Characteristics of stone subgrade

After the rolling is completed, the longitudinal joint (b) should be checked.

A roller operates a 2m straightedge B 3m straightedge C theodolite E's angle and grade.

2, the following does not belong to the highway engineering infrastructure project is (D).

A, project proposal B, preparation of preliminary design documents and budget estimates

C, the preparation of construction drawings and construction budget d, the calculation of quantities.

At 3 o'clock, the steep slope subgrade crosses the original foundation slope 1: 5: 00. On the original basis, steps with a width not less than (b) should be dug and compressed.

a 0.8m b 1.0m

C,1.5m e2.0

4. As a base filler, the maximum particle size of interstitial gravel should not exceed (b).

One, 70 mm, 60 mm? 50 mm caliber, 80 mm caliber

5. It is incorrect to follow the relevant deflection values. The statement is (c).

A, the existing pavement deflection lever deflectometer is measured according to the standard vehicle unloading method.

B, deflection value reflects the pavement strength.

C deflection is proportional to the cumulative number of repeated actions and the life of wheel load.

D, the index of pavement design deflection value, representing the overall stiffness of pavement, mainly calculating the thickness of pavement.

After the mistake, the basis evaluation of construction organization design is (D).

A, the same factor input, and in the shortest time b, the same quality standards and the least production input.

C, the same input of production factors, the same quality standards, safe operation, the best.

D, the same quality standards and input growth of production factors

7, do not belong to the following options, the focus of the cement concrete pavement construction quality control is (D).

A, concrete material B, concrete mix design and test inspection and test samples

C, seam cutting and health control d, design construction joints and seam to grasp the time.

8, loose earth-rock embankment construction control thickness (c) or lower than the subgrade design elevation, need to use earthwork.

One, 20 cm b, 30 cm? 40 cm e50 cm

9. Soils with different properties should be recycled and cannot be mixed. The cumulative total thickness of each layer of filler shall not be less than the thickness in (a).

A.0.5 B.0.8 C. 1.0 D， 1.2m

10。 Building gabion groins in a certain reach, planting grass on the masonry slope and planting a large number of trees in flood, its structure and measures belong to (c).

A. subgrade waterproof engineering B. subgrade reinforcement engineering C. bank protection engineering D. embankment slope protection engineering

1 1。 (3) Grassland protection of various protection projects.

A. Embankment B with stable slope and slight slope erosion is suitable for rapid greening of soil slope.

C. It is suitable for 1: 1.5 or gentle slope D. It is suitable for cutting slope of easily weathered soft rock.

12。 Gabion, riprap, foot guard and branch pile can be used for (a).

A. Direct protection of embankment B. Indirect protection of embankment C. Reinforcement of embankment foundation with embankment support

13。 Which method can measure the density of various soil or pavement materials, and can measure the water content (B).

A. sand filling method B. cutting ring C. nuclear density moisture analyzer D. Beckman method

14。 The asphalt passing through this layer is (A) and should be poured under the following conditions.

A graded macadam and graded macadam base of asphalt pavement

B. Asphalt layer on old asphalt pavement

C. overlay asphalt pavement on cement concrete pavement D. crack or repair old asphalt pavement BR /> 15. Horizontal distance between two ends of arch axis (b) of arch bridge.

A. clear span B. calculate standard span C. D. total span

16。 The height difference between deck and low water level is called (b). .

A. construction height of bridge B. Bridge height C. Bridge clearance height D. Bridge navigation height

17。 Bridge structural system under the same vertical load and span, (a) the maximum bending moment.

A. Beam bridge B. Arch bridge C. Suspension bridge D. Composite bridge

18。 The function of gravity pier (a) of pier arch bridge is braked.

Must be able to withstand large one-way horizontal thrust; B. able to withstand large vertical forces;

. Able to bear large deformation capacity; D. able to withstand greater bending moment.

19。 Highway bridge loads and external forces can be classified into three categories: permanent loads, different loads and (d).

A. vehicle load B. crowd load C. vehicle braking force D. unexpected load

20。 The following construction contents: (1) Fully consider in the construction organization design of bridges and culverts.

A. Construction method and earthwork allocation scheme B. Organize the construction through the method of balanced running water.

C. Implementation plans and methods of each division (item) D. Determine the preparatory work that must be completed before commencement BR />2 1. The following does not belong to the simply supported beam bridge construction quality control point is (C).

A. Control of concrete strength of simply supported beam B. Control of pre-camber

C. Geometric control of simply supported beam D. Support position control of embedded parts

22。 The following cement impermeability requirements are applicable to industries with harsh engineering and crossing roads (A).

A. Ordinary Portland cement

C. slag portland cement

23。 Bearing structure of arch bridge (b).

A. tension b pressure c bending d twisting

24. The contents of the tender announcement do not include (d).

A, the name and address of the tenderer, the nature of the tender, the number of tender places in C network, the time d, and the initial investment.

25。 In the construction project schedule system, we must pay attention to the contact and coordination with the owner, designer, constructor and equipment installer (b) such as schedule arrangement and adjustment.

A. Purchasing goods B. Supervision C. Foreign property management D. General contracting

26。 The construction project constitutes (c) the progress of the phased plan.

A. General schedule B. Sexual schedule C. Monthly schedule D. Construction and equipment installation schedule

27。 The following is the construction project schedule control measures (b).

A. Legal measures B. Management measures C. Safety measures D. Engineering measures

28。 The transverse joint of cement concrete pavement is wrong (A).

A chute b should be adopted for transverse contraction joint of ordinary concrete pavement, and horizontal construction joints should be set at the end of daily paving.

C the transverse contraction joints of ordinary concrete pavement shall be arranged at equal intervals. D. the temperature difference between day and night is determined by the slit mode.

29。 This unit is responsible for the overall organization of drawing diversion (1).

A. Construction unit B. Design unit C. Construction unit D. Supervision unit

30, highway construction should be according to the existing laws and regulations, (a) equipment

Intermittent forced mixing B, continuous forced mixing C, intermittent drum mixing D and continuous drum mixing.

3 1。 In order to achieve the goal and control material consumption, the most commonly used method in construction is (b).

A. Adopt new technology and new process B. Implement the system of quota acquisition.

C. reduce the loss of materials in off-site transportation D. use new structures.

32。 The correct order of the preparation of various plans for material management and the preparation of material plans is (a).

A required material quantity plan → material supply plan → material procurement plan → material contribution plan.

B material supply plan → material consumption plan → material procurement plan → material plan.

C required material quantity plan → material purchasing plan → material supply plan → material plan.

D. Plan material purchasing plan → material demand → material supply plan → material plan.

33。 The main purpose of smooth blasting is (c).

A. the influence caused by the formation of isolation belt and the leveling of slope C. D. seismic performance of test

34。 The base (b) should adopt natural gravel, and its gradation and plasticity index should meet the technical requirements.

And the following two B. expressways and the following expressways.

C. 33d. 4- Factory roads, roads below Grade 4

35。 The first phase of the project has 720 person-days, which must be completed within 20 days, with one person in two shifts every day (D).

A, 36. A, B, 28. C, 18 people D, 18 people.

36。 The dashed arrow indicates the dual code network plan (b).

A, A, B, other C, D workplaces, the logical relationship between adjacent workplaces, free floating work.

37。 In the network diagram, the critical path can be represented as (c).

A, imaginary arrow b, real arrow c, double arrow d, wavy line

38。 The following project construction organization time is the shortest (B)

A, C, B, three-dimensional random construction of parallel flow construction

39。 It is called the operation period, and the construction period (a) is in the process of construction.

1. The duration of water in steps b and c is d, during the construction process.

40。 The time interval between two adjacent construction periods in the same construction period is called (b) visit.

A, running water b, running water duration d and assembly line c during construction.

4 1 defeated. Rhythm flow (d) is based on such an organization.

A, the number of construction teams in the construction process is the same; B, the number of construction sections in the construction process is equal.

C, equal to water, in the process of construction, the duration of group D is equal to

Duration of the construction period. The characteristics of rhythmic flowing water construction that does not belong to it are: (a)

A, the water jump in the construction process, the construction section is equal to B, and the water jump range in the construction process is unstable.

During the construction of C professional operation team, a lot of D and water are one step away from the general scope.

43。 The dashed arrow represents virtual work, and the double code network diagram is (C).

It takes time and resources. B, it not only consumes time, but also does not consume resources.

C, neither time nor resources are consumed. E, neither consumes time nor resources.

44。 Plan, implement, check and improve "(PDCA) cycle management mode, C(D).

The disposal of plan C, A and B is in the process of implementation and inspection.

45。 In industrial construction, a chemical fertilizer plant is planned, and the project is (c).

A, project b, project c, project under construction d, part of this project,

46。 Those with independent design, independent construction and giving full play to production capacity or efficiency are called (B) after completion.

A, single project b, unit project c, subdivisional work d

47. The blue prints.the design preparation unit project construction organization design which stage of the construction procedure (D).

A, undertake the construction task, and determine the acceptance and delivery of the construction contract.

C, carefully organize the construction, strengthen the management d, implement the construction preparation, and submit the commencement report.

48。 Three elements of double arrow network (C).

A, node arrow b starts working hours immediately before going to work, and the work is tense. The critical path is C, work node, D line, construction period, critical path and non-critical line.

49。 Take up the longest schedule and organize the construction in an organized way, construction (a).

A, B, C and Shuiding Stations

50 degrees north latitude. Intermittent time and early insertion time when the construction project organizes flow construction, (a).

A, intermittent time is long, so that the running water and construction time will be prolonged, while inserting time in advance will shorten the pipeline construction period.

B intermittent time, make water shorten the construction period, insert time in advance to make water extend the construction time.

c； Intermittent time or early insertion time

E. The pipeline construction period will extend the intermittent time and advance the insertion time, thus shortening the construction period .../> 5 1。 The third phase of the project is divided into four pipelines, the rhythm is equal to the rhythm of flowing water construction, and the organization to speed up the construction period is doubled. The construction process of running water beat is called 6, 4 and 4 days, and the number of running water steps and professional teams are respectively (D).

A, 6 days, 3 B, 4 and 4 C, 4 days, 3 days, 2 days, 7 days

52。 The engineering quantity of this project is 200 units, and the number of construction teams is 25, with 0.8 units. The construction time per person per day is (a).

A 10 days B 12 days C 8 days team 24 days.

53。 In the process of completing its professional construction team, the duration of each construction period refers to (c).

I. water intensity b, fixing time c, water beating d, and water step

54。 Every activity must have a professional workspace, which refers to the flowing architectural space parameter (B).

In the process of construction, construction surface B, construction surface C, construction surface D and construction layer

Second, multiple choices.

The principles of construction project cost management include: (ABCE). about

Principle b lowest cost, total cost management principle?

D effective principle, cost management, cost management and cost optimization principle? Scientific management of principles

2. The following information about cement concrete pavement is wrong (AD).

A, cement concrete is a kind of flexible material, and its cracks are relatively large when it is stretched and deformed.

B, concrete slab under load, this group has a great influence.br/>;. C, uneven deformation of foundation leads to concrete slab, mainly nothingness.

D, flexural strength The compressive strength of concrete is much higher than that of concrete.

E, concrete slab must have enough tensile strength and bending thickness to withstand repeated wheel loads.

3. The conditions for the completion acceptance of highway projects include: (ABDE).

A, after the acceptance date, all parts reach the qualified project.

Complete file

The Interim Provisions on Archives Management of 3C National Infrastructure Projects and related regulations have been completed, and it is required to start compiling the final accounts of the project completion.

D, construction, supervision, design, construction, supervision and other units have written reports.

E, unfinished projects, or from the date of maintenance, remedial projects have been processed and qualified.

4. Roadbed supervision engineer and quality supervision department (ABCD) shall conduct dry and wet inspection.

A, dry B, wet? Wet d, it's too wet

5 pavement test, including (ABC).

A, height, thickness b, base, width, cross slope, base flatness />c, base compactness and strength d, base compaction method e, base anti-sliding structure depth.

The following materials are suitable for roots, transverse and terminal groups (AC) of highway grass at all levels.

A cement stabilized lime stabilized B class C class lime fly ash stabilized D class, cement fly ash? , fly ash stability grade

7. The principles of plane design for expressway construction include: (ABDE).

First, make full use of the existing topography and features, reduce cultivated land, and reduce the project cost according to the local actual situation.

B. Fully consider natural conditions such as hydrology, geology and meteorology.

C, full

E considering the influence of site planning of self-built capacity, it must be scientific and reasonable.

Must comply with the provisions and requirements of safety, public security, fire prevention and civilized construction.

8 The basic methods of expressway construction organization include: (BC).

A, mixed task force method ",through the construction of control matrix in department B, realize orderly work, parallel operation and parallel sequence method"

C, assembly line method, network planning method, manual operation parallel flow method D, semi-mechanized mechanized construction method and construction method

Group e system, linear system function, hybrid working group

9。 Embankment protection engineering is an important facility to prevent subgrade diseases, ensure subgrade stability, improve environmental landscape and protect ecology, which can be divided into (AB).

A. slope protection and river bank erosion protection C. plant protection D. engineering protection (mineral protection) E. natural protection

10。 Subgrade is divided into structural classes (ABE)

B.A. Fill subgrade excavation subgrade C. Rock-filled embankment D. Fill subgrade E. Half-filled and half-filled.

1 1。 The construction of compacted cement stabilized soil structure layer should be carried out during mixing (BC).

A. slightly less than the optimal water content B. slightly greater than the optimal water content D. daily limit in drying E. maximum water content

12。 (AC) The structural layer is paved with viscous asphalt, and the asphalt surface layer is poured.

A. Old asphalt pavement B. Graded macadam C. Concrete D. Lime stabilized macadam E. Gap-filling macadam

13。 Hanging important parts (ABCD).

A. Sarasota B. Main cable C. Lifting strap D. Stiffening beam E. Deck system and accessories

14。 Construction method of reinforced concrete arch bridge.

A. support method B. cable hoisting method C. swivel method D. combined bridge method E. method, collocation method and tower method

15。 The whole process of construction quality control includes: (ABED).

A. Quality control of input material resources B. Evaluation and acceptance of engineering quality

C. Preparation of engineering bidding and quality control of engineering products D. Quality control

E. process control of building installation quality

16。 The following statement is based on the correct handling of the original text (ABCD).

A. trees, shrubs, etc. Before transplanting, the subgrade land should be cut down or cleared, and the cut trees should be moved appropriately on the subgrade land.

B backfill the original pits, holes and graves with soil or sand, and tamp them according to regulations.

C. If the undisturbed soil strength of the original foundation does not meet the requirements, the remaining part shall be backfilled, and the replacement depth shall be not less than 20cm.

D when the height of embankment is less than the compaction layer of subgrade (80cm), the thickness should not be less than the compaction standard of base.

E. When the height of embankment fill is greater than the thickness of subgrade (80cm), the compaction degree of subgrade shall not be lower than the compaction standard of foundation.

17。 The fillings of subgrade of the following grades shall be tested by site excavation to meet the design requirements (AB).

A. Highway b- high-grade highway C. Secondary highway D. Tertiary highway E. Sima Road

18。 Engineering characteristics of expansive soil (CD). BR/>； A.b. low strength, low compression, C. dehydration shrinkage, D. water absorption expansion, E. good integration

In case, the title

1。 The steel pipe support of the 20+3× 2520m reinforced concrete continuous box girder bridge of the bridge was cast in situ, and it was completed at one time.

[Question]:

1) the basis of co-processing?

Answer: Usually the foundation replaces the roller compacted concrete strip foundation and the concrete beam of the pile foundation.

2) How to build a bridge with the same quality control points?

Answer: (1) control of strength concrete beams; (2) Pre-camber control; (3) Support the position control of embedded components; (4) bearing installation mode and direction control (5) expansion joint installation quality control; (6) The solution of controlled support.

3) What are the requirements for raw materials and templates to prevent bridge structural cracks?

Answer: choose high-quality cement and concrete with reasonable overall design to prevent cracks caused by excessive water-cement ratio; Control the concrete mixing time to avoid too long after mixing. When pouring concrete, it should be fully vibrated, and health work should be strengthened.

2。 A 62.0-meter bridge foundation pile with a length of 35 meters is set at the top of the cap. The geological conditions are as follows: the original site is covered by 2M in turn, and the soil contains 65,438+05% sand and gravel; The construction unit whose construction elevation is 1.5M higher than the top of the pile adopts the positive circulation rotating traffic, and the conduit is poured with underwater concrete. /& gt； [question]

What should I pay attention to?

2) What should I pay attention to when cleaning holes?

3) How does the underwater concrete hole-forming process proceed?

Answer: 1) It should be noted that:

(1) Start the mud pump and rotary table, and start drilling only after a certain amount of mud is drilled;

(2) Continuous drilling has not stopped; The blade of casing drilling foot should be low-grade and slow;

(3) During drilling, ensure the mud in the hole and the water level above 0.5m to make up the leakage;

(4)2-3M to check the aperture and verticality;

(5) Decompression drilling should be adopted to reduce reaming, bending and inclined holes, so as to keep the drill pipe vertical.

2) In the process of hole cleaning, attention should be paid to:

(1) and the rapidly changing slurry cleaning method (2) must ensure the head of the hole to prevent the hole from collapsing; (3) After hole cleaning, the relative density and deposition thickness of mud should meet the specification requirements.

3) Key points of concrete pouring:

(1) Before using the closed water test, conduct (water tightness and pressure) and joint tensile test;

(2) The catheter should sink stably in the center; The distance between the conduit and the pile bottom should meet the specification requirements, generally 0.25 ~ 0.4, and it can be 0.8 when buried in concrete. 1.2m；

(3) After the first time, the catheter is poured and sheared, and the concrete is slowly poured to prevent the high-pressure air bag from being generated. The construction conduit is always filled with concrete, the height and buried depth of the top surface of concrete are measured in time, and the conduit is removed in time;

(4) The first batch of concrete conduits should be installed before the initial setting of the underwater concrete pouring pipeline, otherwise it will slow down the speed.

(5) Concrete shall be poured continuously, and the pile position shall be kept at 0.5? 1.0m pile with altitude higher than the top.

3. A village is located in a mountainous area, and the villagers' committee decides that roads and highways in the mountainous area will be connected with the outside world, and villagers in the same village will know more about the outside world, thus driving the economic development of the village. When the construction team entered the construction site, they found many rocks on the road subgrade. Subgrade stonework blasting technicians decide.

1) What are the commonly used blasting methods?

2) What are the advantages of the pot blasting method chosen by stone engineering technicians?

Answer: 1) Common blasting methods: brazing gun, sand blasting, pharmaceutical gun, cat hole blasting (cave) construction method and comprehensive blasting method.

2) Features of guns produced by pharmaceutical manufacturers: terms mainly used for open-air blasting: the rock should be below Grade VII, without humidity, and the step height (h) should be less than 10? 20 meters, the natural slope of the ground is about 70. If it is mild, steel guns are generally used to cut off the natural slope of the ground and blast out the steps. Then the experience shows that the center is most suitable for drug makers to shoot 7-9 grade rocks, 6 meters high and deepen.

4. Roads and bridges under bridge foundation construction have a lot of sand, gravel and flood sand layers below a certain depth on the surface of flood alluvial plain. The company is going to adopt the bored pile construction method of pouring off piles during the test.

Scope of application of bored pile described in 1).

2) In order to ensure the smooth construction of bored piles, how to prevent broken piles?

Answer: (1) Bored piles are suitable for clay, sand, gravel, crushed stone and other soils.

(2) Prevention of broken pile of bored pile: (1) Before the catheter is used, conduct leak detection and tensile test on the catheter to prevent broken pile.

Catheter leaks. (2) the downcomer, the distance from the bottom hole to the bottom of the hole is not more than 40? 50cm, at the same time can ensure that at least 65438+/-0.0 meters after the first concrete pouring. When pouring, the buried depth of the conduit is generally controlled within 2.0. 4.0m ③ The slump of concrete should be controlled at 18? 22 cm, good machinability requirements ④ Reinforcing cages are generally used for butt joint, in order to ensure smooth welding in subsequent processes. ⑤ Determine the depth of the lifting conduit by measuring the concrete filling quantity, take out the length of the conduit and carefully calculate the length of the lifting conduit. Have spare key equipment and materials, and make full preparations to ensure that concrete can be continuously used as a conduit for concrete plugs, can support hot plugs and shake conduits, and pass special treatment in the conduits. ⑧ When trying to put the catheter reinforcement cage, the catheter got stuck.

5 perfusion. After the completion and acceptance of major highway reconstruction projects, they presided over the engineering design documents approved by the local transportation departments, comprehensively evaluated the comprehensive evaluation results of major construction projects, and determined that the unit that presided over the completion and acceptance of construction projects would accept the projects from the date of receiving the acceptance report from the construction unit and verifying it in detail, and accept the documents with quality defects that failed to fully reach the project quality level. Meet the design requirements.

Question:

(1) Highway engineering acceptance is divided into two stages?

(2) What are the conditions for the completion and acceptance of the expressway project?

(3) What should they do if there are quality defects during the handover and acceptance?

A:

(1) The acceptance of highway engineering is divided into two stages, from the date of acceptance to the completion acceptance. BR/>； (2) The highway project completion acceptance shall meet the following conditions:

(1) Project bidding after completion acceptance;

(2) The unfinished project, or the remedial project has been handled and inspected by the supervision engineer and quality supervision department since the date of maintenance acceptance;

(3) The Interim Provisions on Archives Management of National Infrastructure Construction Projects and relevant regulations have completed the completion documents as required; /& gt； ④ The project account has been compiled;

(5) the construction, supervision, design, construction, supervision and other units have submitted materials in writing.

(3) unqualified or defective projects and projects under construction must be provided by the contractor and repaired within a time limit, and the expenses shall be borne by the contractor from the date of completion of the repair measures.

6. During road construction, the tunnel collapsed, and eight workers of the road construction company were injured on the spot and were taken to the hospital, two of whom had died. After the accident, the quality supervision station initially identified the incident as a major quality accident.

1) Should the accident unit report it?

In case of a major quality accident, the accident unit must report to the provincial department in charge of transportation and the the State Council department in charge of transportation within 2 hours, and at the same time report to the provincial quality station and the general quality supervision station. 12 months. Express of major quality accidents in highway engineering. The quality accidents reported in writing are as follows: (1) project name, accident time, place, name of construction, design, construction and supervision unit; (two) a brief description of the accident, engineering injuries, casualties and direct economic losses; (3) preliminarily judge the cause of the incident; (4) Measures taken after the accident and accident control; (5) accident reporting unit.

2) Should protective measures be taken at the scene of major quality accidents? After the accident, the accident unit and the project construction, construction and supervision unit shall strictly protect the scene of the accident, rescuers and property, and take practical and effective measures to prevent accidents. Rescuers, mobile traffic and other reasons, need to move the scene objects, should be marked, draw a sketch of the scene, and make a written record, save the important traces and physical evidence at the scene, and should be reflected in the photos or videos taken at the scene, and recorded directly without interference.

3) What is the principle of "not letting go" of quality accidents?

The principle of "three-no-misses" shall be implemented in the handling of quality accidents: the cause of the accident is unknown and stand by; Responsible for accidents and people who have no education and no preventive measures.