Single-hole double-layer overlapping tunnel structure and construction method thereof

A technology of tunnel structure and construction method, which is applied in tunnels, tunnel lining, earth-moving drilling and mining, etc., can solve the problems of large influence of surrounding buildings, complex stress and deformation, and difficulty in construction, so as to enhance safety, reliability and stability. , The effect of reducing the number of pile foundation underpinning and reducing the project cost

Inactive Publication Date: 2007-11-07
铁道第二勘察设计院 +2
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The excavation of the tunnel twice has a great impact on the surrounding buildings of the tunnel;
[0004] 2. The two holes are constructed by the positive step method. Due to the overlapping of the upper and lower small intervals, the mutual influence is serious, and the force and deformation are complicated;
[0005] 3. It is necessary to reasonably select the upper and lower construction sequence and construction interval, the process is complicated, it

Method used

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  • Single-hole double-layer overlapping tunnel structure and construction method thereof
  • Single-hole double-layer overlapping tunnel structure and construction method thereof
  • Single-hole double-layer overlapping tunnel structure and construction method thereof

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Embodiment Construction

[0040] Referring to Fig. 1, the single-cavity double-layer overlapping tunnel of the present invention comprises a composite lining structure 2 compounded on the high-side wall single-cavity wall 1 with a height-span ratio greater than 2, and the lining structure consists of an initial support 3, a waterproof layer 4 and two The secondary lining is composed of 5, and a layer of partition board 6 is set in the middle of the tunnel to separate the upper and lower holes. As shown in Fig. 1 and Fig. 2, the initial support is composed of steel arch 7, advanced small conduit 8, system anchor rod 9, and shotcrete 10. The steel arch is spliced ​​by I-beam or grid steel frame. Connect with connecting steel bar 11 between product steel arch frames.

[0041] As shown in Figure 3, when the single-cavity double-cavity overlaps with the double-cavity tunnel, it is necessary to increase the height of the single-cavity double-cavity tunnel and set up a second-floor partition to increase the d...

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Abstract

The invention provides a single hole double layer overlapping tunnel structure including the single hole tunnel which the high side wall with the high/stride ratio is bigger than 2, the composite lining structure in the single wall and the upper/lower overlapping tunnel set in the middle of the high side wall. The invention also provides the constructing method. The invention can build the two-line tunnels in the limit room under ground and decrease the environment influence, the underpinning number of the pile foundation and the cost.

Description

Technical field: [0001] The invention relates to a subway overlapping tunnel structure-a single-hole double-layer overlapping tunnel and a construction method thereof. It belongs to the field of underground engineering. Background technique: [0002] In the construction of underground railway projects in high-density high-rise building urban areas, due to the criss-crossing of underground pipelines and the dense distribution of underground buildings (structures) such as pile foundations, the underground space is very limited and wiring is difficult. In order to meet the requirements of passenger traffic, the subway line needs to adopt a double-line line, and its layout forms are various, mainly including a single line with two lines in parallel, a single line with two lines in parallel, and a single line with two lines overlapping. Tunnels pass through underground pile foundation groups. When the underground corridor is limited and the tunnel width is limited, the structure...

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Application Information

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IPC IPC(8): E21D9/00E21D11/04E21D11/38
Inventor 李德才刘建国仇文革王明年罗世培扈森苟明中牟锐方昌福朱颖张海波喻波刘启峰李学军朱宏海郑余朝陶德敬
Owner 铁道第二勘察设计院
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