Introduction to the construction characteristics of Hefei-Tonghua-Huanghua Expressway?

Anhui Communications Investment Group Co., Ltd. is the main investor in the construction of Huang Tong section of Hefei-Wuhu-Bangguo Expressway. Tongling-Tangkou section is a World Bank loan project, which started construction in June 2004, and Tangkou-Tunxi section started construction in February 2004, both of which were completed and opened to traffic on September 28, 2007. The following describes the construction characteristics of Hefei-Tonghua-Huanghua Expressway:

Mountain expressway

Strengthen the management in the design stage to ensure that the design scheme reduces the occupation of resources. On the premise of ensuring safety, the route selection of Huang Tong Road has been strictly compared and demonstrated, and wasteland and non-cultivated land are used as much as possible to minimize the occupation of basic farmland; Optimize the design many times during the construction process. Through the extensive use of bridge and tunnel schemes, Huang Tong Expressway saves land 1685 mu, accounting for 8% of the original planned land acquisition.

Strengthen the management of construction process and make rational use of resources. In the construction, firstly, the local development should take into account the utilization of building resources, and use waste stones to process gravel filling to reduce resource exploitation. The second is to strengthen project site management and save resources. Reduce building area and roads.

Further save energy and increase efficiency through scientific and technological innovation. Two scientific and technological achievements in Tangtun section of Huang Tong Road, "Research on key technologies of long-span tunnel design and construction under complex geological conditions" and "Research on optimization system of high slope stability and support design", have been identified as international advanced levels, and the funds saved after application have reached more than 6,543.8 billion yuan. Huang Tong Road Huangbangling Tunnel is tested for solar power supply lighting, and other tunnels adopt LED energy-saving power supply system. After the application of this achievement, the electricity consumption of the tunnel will be greatly reduced and good energy-saving effect will be achieved.

Ecological high speed

In order to protect the environment, in addition to being included in the main project, the environmental protection investment in the construction of Tonghuang Expressway has reached 654.38+0.5 billion yuan. We adhere to the principles of "no damage is maximum protection" and "minimum damage is maximum recovery" and strive to achieve minimum impact, maximum protection and maximum recovery. At present, due to proper ecological protection measures, the vegetation in the excavation section of Huang Tong Road has basically recovered, and more than 80% of them are native plants.

Establish a new concept of environmental protection under construction in an all-round way and establish a complete environmental protection work system. Invite the local government and the masses to participate in environmental supervision, set up environmental warning signs in each bid section, and publish environmental reporting telephone numbers.

Solve the difficulties of ecological protection and strive to achieve the most effective protection of the environment. The first is to innovate the design concept and implement ecological protection in the design ideas. The route shall be arranged according to the natural terrain as far as possible to avoid high filling and deep excavation. When the Taiping Lake Bridge crosses the lake, there are no piers in the lake to reduce the pollution to the water body. The second is to innovate the concept of slope construction and adopt natural slope technology to realize the combination of slope and landscape.

Strict construction management, and strive to achieve the minimum impact on the environment. First, regular environmental monitoring. The second is to strengthen the construction of residents' environmental sanitation. The third is to strengthen the node control in the construction process. Fourth, strengthen the protection of water resources. Fifth, strengthen the control of dust and air pollution.

Strictly control the important pass of environmental restoration and restore the environment to the maximum extent. First, strictly control the restoration of borrow sites and spoil sites. The recovery and utilization rate of waste residue yard is as high as 90%. The second is to strictly control the ecological restoration of slopes. Professional greening design units, ecological landscape consulting units and ecological restoration technical experts put forward optimization design suggestions, which are implemented by professional greening construction teams. The third is to strengthen the restoration of the surrounding environment of construction projects. Local protection measures were taken for ancient trees along the trunk line, which effectively protected the natural environment along the line.

Demonstration expressway

Breakthroughs of 2000 meters and 3000 meters of Anhui Highway Tunnel were achieved in Huang Tong section, and the Taiping Lake Bridge, the first span in Asia, was also built in Huang Tong section.

The first is to carry out in-depth scientific research. Extensive cooperation with universities and research institutes, from design to construction, declared a number of scientific research topics. Among them, the research on the cable hoisting system without support of Taiping Lake Bridge has reached the international advanced level. During the construction of the project, more than 65,438+00 famous domestic experts and scholars, including China Institute of Engineering, were invited for technical consultation, service and guidance.

The second is to strengthen project management innovation. Actively carry out the first piece system project. Use the first project to guide standardization and standardized production.

The third is to encourage the application of new technologies and new processes. New technologies such as dry vibration composite pile technology, high-speed hydraulic impact tamping, impact roller supplementary tamping technology, pile foundation construction in karst area and goaf treatment have been successfully applied.

Harmonious expressway

In the design of Hefei-Tonghua-Huanghua Expressway, we should adhere to the awareness of the interests of the masses and actively solve the problems left over by the policy; Adhere to the principle of non-interference between engineering production and people's lives; Adhere to the principle of protecting groups and properly handle the problems of migrant workers and vulnerable groups in demolition.

First, in the process of land acquisition and demolition, the purpose of emotional demolition and sincere resettlement was achieved. The project office strictly follows the action plan for resettlement of the second phase of Anhui highway project approved by the World Bank, and carries out resettlement work in line with the principle of minimizing the impact on immigrants and striving to restore and improve their production and living standards, and combines resettlement with regional development and economic development. The most obvious change is Zhenjiang immigrant village in Tanjiaqiao, huangshan district. Twenty-nine immigrants took advantage of the beautiful local natural environment and uniform new homes to develop "farmhouse" tourism projects. The "May Day" Golden Week in the past two years has made the people's money bags bulge.

The second is civilized construction, which will minimize the impact of construction on the living environment of residents. Set up sound insulation walls in densely populated construction sites, choose to carry out tunnel blasting at a time that does not disturb residents' rest, and reserve safe passages for surrounding schools.

Boutique expressway

First, the pass moves forward and the source is closed.

Introduce advanced technology and design concepts, carry out joint research and improve design quality. In the process of construction, the Taiping Lake Bridge, high slope, subgrade and overall structure are optimized. Control the purchasing and testing of materials.

The second is to highlight key points and strengthen process control.

Through the analysis and investigation of the difficulties in the whole project, the construction process control of Taiping Lake Bridge, high slope, tunnel and karst pile foundation is particularly strengthened. Taiping Lake Bridge is a basket-type concrete-filled steel tubular arch bridge with a clear distance of 336m m. During the construction stage, famous domestic experts are invited to conduct expert review on the technical scheme and safety scheme, and attention should be paid to inspection and monitoring during the construction process. For the treatment of high slopes and ancient landslides, we should adhere to the principle of "radical treatment at one time, leaving no future trouble" and strictly implement the principle of "step-by-step excavation, first-level excavation and first-level protection". In tunnel construction, the scheme of "four grasping and one strengthening" is adopted, that is, grasping into the tunnel to realize early entry; Master the classification and evaluation of surrounding rock, and revise and improve the design; Pay attention to monitoring and measurement to serve the design and construction; Grasp the construction difficulties and ensure steady progress; Strengthen the acceptance of concealed works to ensure no future trouble.

The above is the introduction of Zhong Da Consulting on the construction characteristics of Hefei-Tonghua-Huanghua Expressway. For more information about expressways, please pay attention to the architectural knowledge column of Zhong Da Consulting.

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