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Metro-adjacent complex geological environment supporting system construction method

A technology with complex geology and construction methods, applied in excavation, infrastructure engineering, construction, etc., can solve problems such as damage to the vibration of track test lines, and achieve the effects of solving mud pollution, improving bearing capacity, and flexible walking of equipment

Inactive Publication Date: 2017-04-26
CHINA CONSTR SIXTH ENG BUREAU CIVILENG +1
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Problems solved by technology

What this patent discloses is the water-stop support of the foundation pit with long helical rotary spraying and mixing cement-soil shaped steel piles, in which the shaped steel needs to be pulled out and reused repeatedly, and the vibration that will easily damage the track test line is easily caused when the shaped steel is pulled out

Method used

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  • Metro-adjacent complex geological environment supporting system construction method
  • Metro-adjacent complex geological environment supporting system construction method

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Embodiment 1

[0029] (1) Determine the positions of the foundation pits of the basement 1 of the 1# plot and the basement 2 of the 2# plot on the front and rear sides of the track 3 of the subway test line; 6 constructions of bored piles, and the construction of the adjacent long spiral bored piles is carried out after pouring the concrete for 24 hours; the construction of the long spiral bored piles in the basement 1 of the 1# plot and the basement 2 of the 2# plot The direction is: the first step: carry out the construction of long helical bored cast-in-situ piles 6 on the side where the basement of the 1# plot 1 and the basement of the 2# plot are closest to the track 3 of the subway test line. The starting position of the construction of the cast-in-place pile 6 is the place where the soil squeezing effect is the largest; the second step: carry out the construction of the long spiral bored cast-in-place pile 6 in the remaining parts of the basement 1 of the 1# plot and the basement 2 of ...

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Abstract

The invention discloses a metro-adjacent complex geological environment supporting system construction method which comprises the following steps: (1) determining foundation pit positions of a 1# plot basement and a 2# plot basement 2, which are to be established, adjacent to the front side and the back side of a metro test line rail respectively, and then carrying out poured long screw drill pile construction on each pit sideline position every two holes respectively; and (2) symmetrically and simultaneously excavating the 1# plot basement foundation pit and the 2# plot basement foundation pit adjacent to the front side and the back side of the metro test line rail according to layers and sections respectively, and then carrying out prestressed anchor rod construction of corresponding layers, wherein at the depth of a first layer, tops of piles in the same foundation pit are connected together through a top beam, and a circle of brick wall is built on the top of the top beam. With adoption of the method, running safety of a metro is guaranteed to the maximum.

Description

technical field [0001] The invention relates to a foundation pit support in a complex geological environment, in particular to a construction method for a support system in a complex geological environment adjacent to a subway. Background technique [0002] With the rapid development of the modern construction industry, a large number of subway projects have started construction. Many test line tracks are included in the construction of the subway project. When the foundation pit of the proposed building is adjacent to the track of the existing subway test line, safe and reliable support methods should be adopted to reduce the vibration impact of the foundation pit support excavation of the proposed building on the track test line. [0003] Authorized patents obtained by searching: [0004] 1. The Chinese patent with the application number: CN201010101099.6 discloses the "full-length spiral anchor rod pressure grouting device and construction technology", including the fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 王丽梅袁银书王安鑫张肖郭建东
Owner CHINA CONSTR SIXTH ENG BUREAU CIVILENG
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