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Low-disturbance groove-forming construction method for underground continuous wall encountering old supporting structure

A technology for underground diaphragm walls and supporting structures, which is applied in foundation structure engineering, excavation, sheet pile walls, etc., can solve the problems of underground diaphragm wall trenching construction and no construction method, etc., and achieves wide application range, high cost efficiency, large Promoting the effect of app value

Active Publication Date: 2019-04-26
广州珠江建设发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the construction of the underground diaphragm wall of the underground structure of the old city renovation project, there are often engineering problems that coincide with the old support structure of the underground structure of the existing building, and the foundation is silty soil and quicksand and other unfavorable geology. The tunneling construction of the underground diaphragm wall is carried out by means of high disturbance such as punching piles and holes, but there is no better construction method to solve this engineering problem at present

Method used

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  • Low-disturbance groove-forming construction method for underground continuous wall encountering old supporting structure
  • Low-disturbance groove-forming construction method for underground continuous wall encountering old supporting structure
  • Low-disturbance groove-forming construction method for underground continuous wall encountering old supporting structure

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Embodiment 1

[0045] Now, the underground structure of an old city renovation project partially overlaps with the underground structure of the existing subway rail transit. Under the premise of ensuring the normal operation of the subway line, how to carry out the demolition of the old underground foundation with the minimum disturbance to the surrounding structure of the subway And the construction of the proposed underground diaphragm wall is taken as an example to describe the low-disturbance trough construction method of the underground diaphragm wall of the present invention in case of old support structures.

[0046] Such as figure 2 with image 3 As shown, in the S10 step of the present embodiment, because the old support structure of the existing subway rail transit underground structure (subway station) is buried below the flat ground, and the data of the old underground structure is incomplete, its construction positioning quality is also poor. Can not guarantee. Therefore, it ...

Embodiment 2

[0064] Such as Image 6 with Figure 7 As shown, the construction method of the underground diaphragm wall described in this embodiment with low disturbance to the old support structure is only different from that of Embodiment 1 in the step S31: that is, the two adjacent existing enclosures to be demolished With the pile as the center, pour the first section of the retaining wall 51 of the artificially dug hole 4, and the height of the brick form of the first section of the retaining wall is from the field flat surface to the pile top+100mm.

[0065] Other steps and implementation effects are the same as those in Embodiment 1, and will not be repeated here.

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Abstract

The invention discloses a low-disturbance groove-forming construction method for an underground continuous wall encountering an old supporting structure. The low-disturbance groove-forming construction method comprises the following steps of S10, detecting a position of the old supporting structure, and determining a to-be-disassembled region of the old supporting structure according to a trend ofan underground continuous wall groove body planned to build; S20, arranging double rows of stirring pile water retaining curtains on the outer side of the region to be disassembled; S30, chiseling off each existing fender pile in the region to be disassembled by adopting a manner of manual hole digging and a soundless breaking agent; S40, performing backfilling and replacement soil body construction on manually digged holes in the region to be disassembled; and S50, performing groove-forming construction of the underground continuous wall groove body by using a groove milling machine. The low-disturbance groove-forming construction method can realize low-disturbance groove-forming construction of the underground continuous wall planned to build when the old supporting structure is encountered, effectively solves the engineering problem that the underground continuous wall planned to build encounters the old supporting structure in an old city renovation project adjacent to a subway atpresent, is wide in application range, is economic and efficient and has very large popularization and application values.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a low-disturbance groove-forming construction method for an underground continuous wall meeting an old support structure. Background technique [0002] In recent years, urban construction and development are changing with each passing day. In big cities such as Beijing, Shanghai and Guangzhou, where land is scarce, there are more and more old city renovation projects. Affected by the lack of foresight in the early urban construction planning, the underground structure of the old city renovation project in the old urban areas of Beijing, Shanghai, Guangzhou and other big cities overlaps with the underground structure of existing buildings, especially the underground structure of subway rail transit. Under the premise of operation, how to carry out the demolition of the old underground foundation and the construction of the new structure adjacent to the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/18E02D17/08
CPCE02D5/187E02D17/08
Inventor 卜继斌温喜廉黄林叶家成曾梓杰张少敏潘盛欣
Owner 广州珠江建设发展有限公司