Introduction of Xiamen Xiang 'an subsea tunnel?

What is Xiang 'an Tunnel? What is the basic situation of Xiang 'an Tunnel? The basic contents of Xiang 'an Tunnel compiled by Bian Xiaozhongda Consulting Company are as follows:

Through the knowledge collation of the architectural knowledge column of this website, Zhong Da Consulting has the following basic information about Xiang 'an Tunnel:

Xiamen Xiang 'an Cross-Harbour Tunnel, with a total length of 8.695 kilometers, takes 82 minutes to reach the opposite mainland from Xiamen Island. 20 10 On April 26th, the first subsea tunnel in Chinese mainland, Xiamen Xiang 'an subsea tunnel, was completed and opened to traffic. Xiamen Xiang 'an subsea tunnel with two directions and six lanes is the fifth access channel in Xiamen Island, which has dual functions of highway and urban road. Its completion and opening to traffic will enable Xiamen to reach the island and form all-weather three-dimensional traffic from the sea to the seabed.

Construction process of Xiang' an subsea tunnel in Xiamen;

As early as 1994, the far-sighted urban construction decision-makers in Xiamen planned to open the East Passage, and formally listed the preliminary project of the East Passage as the key project during the Ninth Five-Year Plan and the Tenth Five-Year Plan. Starting from 1998, the preliminary work of the East Passage started in an all-round way, and geological exploration and scheme research began. From 1997, it has gone through eight years of preliminary work. The project officially started construction on September 6, 2005. The three tunnels were fully connected on June 5438+065438+ 10, 2009, and opened for operation on April 26, 2006. The construction process lasted four years and eight months. During the construction period, leaders at all levels of the central government, provinces and municipalities placed great hopes on the tunnel project, and all relevant departments and units of the state, provinces and municipalities and experts at home and abroad gave full support and careful guidance, and all sectors of society and the general public also paid close attention to it. General Secretary Hu Jintao is very concerned about the construction of Xiang 'an Tunnel. During the Spring Festival of 20 10 in Xiamen, I specially inspected Xiang 'an Tunnel Project, demanding "make persistent efforts to ensure quality and safety and build this project into a high-quality project!" .

On June 3rd, 2009 15: 58, with the loud noise of the last group of blasting, the right line of Xiamen Xiang 'an subsea tunnel, the first subsea tunnel in Chinese mainland, was connected.

165438+200915 October, the first subsea tunnel in Chinese mainland-Xiamen Xiang' an subsea tunnel took more than four years to complete.

The implementation of Xiang 'an tunnel project has the characteristics of complex geological conditions, little engineering experience, high technical difficulty, great construction risk and great social impact. There are three main technical difficulties in the construction process: one is to carry out large-section shallow excavation in the completely weathered land area; The second is the construction of permeable sand layer in shallow section; Third, the construction of weathered deep trench on the seabed. The builder of Xiang 'an Tunnel told reporters that Xiamen Xiang 'an Cross-Harbour Tunnel has several rare problems in the world-the shallowest cross-harbour tunnel in the world, with the thinnest part of 5.7 meters; The excavation section area of the vehicle main tunnel is 170.7 square meters, which is the first case in the history of subsea tunnel construction in the world. The scale of weak surrounding rock (commonly known as mud), water-rich sand layer and weathering trough group (capsule) is also rare in the world.

In order to overcome these world-class problems, builders rely on scientific and technological progress, strengthen geological advance prediction, use the method of combining tradition and innovation, adjust measures to local conditions, and promote tunnel construction safely and steadily. They purchased the most advanced RPD 180C multi-functional drilling rig in the world today, adhering to the principle of "exploring if there is danger, exploring if there is no danger, and exploring before doing it" to ensure that every step of the construction is well known; They innovated and reformed the traditional CRD construction method, and the continuous monthly driving speed in soft surrounding rock exceeded 60 meters, with the highest value reaching 73 meters, creating a record of the construction progress of the world's super-large cross-section submarine tunnel under the same geological conditions; They adopted the method of "underground continuous wall well point dewatering" and successfully crossed the water-rich sand layer of more than 630 meters; By adopting "full-face curtain grouting technology" and "grouting small duct technology", the rampant of strong weathering trough was restrained.

Due to independent innovation, the safety of Xiang 'an subsea tunnel has been guaranteed to the greatest extent. It has the highest corrosion resistance and water permeability, and can resist an earthquake of magnitude 8. Its construction technology has reached the top level in the world, and the qualified rate of engineering quality is 100%. It was identified as one of the three national model projects by the Ministry of Transport.

According to statistics, about 2.35 million cubic meters of earth and stone were abandoned in the excavation of Xiang 'an subsea tunnel, which could almost fill the Great Pyramid of Egypt. Bolt, steel frame, steel mesh, lining steel bar and other supporting steel products are about 50,000 tons, equivalent to seven Eiffel Towers in Paris. There are more than 20 cross-sea tunnels built or under construction all over the world, mainly distributed in Europe, Japan and Hong Kong.

Xiamen Xiang 'an subsea tunnel contractor:

Brief introduction of China Railway Tunnel Group Co., Ltd.;

China Railway Tunnel Group (CTG) is the largest enterprise group in the field of tunnel and underground engineering in China, which integrates four functions: survey and design, building construction, scientific research and development, and mechanical repair.

The predecessor of China Railway Tunnel Group was 1978+00, the Tunnel Engineering Bureau of the Ministry of Railways approved by the State Council in June, and later renamed as China Railway Tunnel Engineering Bureau. In May of 20001,it was restructured into China Railway Tunnel Group Co., Ltd., headquartered in Luoyang, Henan Province, and affiliated to China Railway Engineering Group Co., Ltd., and in 2008, it was affiliated to China Railway Corporation, known as China Railway Tunnel.

Relevant construction enterprise personnel can log in to Zhong Da Consulting and Construction Communication column to inquire about the relevant contents of China Railway Tunnel Group's bidding. Basic information includes:

China Railway 20th Bureau Group Co., Ltd. has won 442 bids, with construction enterprise qualification 15 and bad construction record 130. For details, please visit Zhong Da Consulting Construction Link.

Luo Dongping, the project manager, was sent to informed criticism because of the problems in the special safety inspection of the civil engineering Ⅳ-TS-08 of Suzhou Rail Transit Line 4.

Because the project manager of No.4 Bid Section of Tongling Road Elevated Project has not been on duty, the box girder support at the intersection of Linquan Road and Tongling Road was constructed. Four scaffolders who were working at heights were stopped from rectification without wearing safety belts, and were given a "yellow card" warning. Their bad behavior was recorded once, and the project manager Cao Yang was recorded once.

Because the tower crane driver and conductor of the second phase of rail transit line 4 did not provide the original works, they were required to make rectification within a time limit.

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