Underground diaphragm wall foundation pit construction method

An underground continuous wall and construction method technology, which is applied in basic structure engineering, sheet pile walls, buildings, etc., can solve the problems of the need to improve the construction efficiency, affect the construction progress, and prolong the construction period, so as to improve the convenience and stability, Improve the use effect and strengthen the effect of connection stability

Inactive Publication Date: 2020-06-05
深圳市蛇口招商港湾工程有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: the foundation pit construction method of the underground diaphragm wall seriously affects the construction progress during the construction process, prolongs the construction period, and the construction efficiency needs to be improved

Method used

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  • Underground diaphragm wall foundation pit construction method

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0030] Such as figure 1 Shown, a kind of underground diaphragm wall foundation pit construction method comprises the following steps:

[0031] Before the underground diaphragm wall is grooved, the guide wall should be made first, and the total station should be used for lofting. Considering the construction error and the convergence of the maintenance structure during the excavation of the foundation pit, the guide wall needs to be properly placed outside. In this embodiment, it is preferable to place 8CM outside. ; The guide wall adopts an integral reinforced concrete structure, and the steel bars are bound, and the formwork is reinforced. At the knuckles of the ground wall, in order to ensure the quality of the groove, the knuckles need to be lengthened by a certain length. This embodiment preferably lengthens 30CM, and made "Ten" shape; after the strength...

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Abstract

The invention relates to an underground diaphragm wall foundation pit construction method which is characterized by comprising the following steps: S1, before grooving of an underground diaphragm wall, manufacturing a guide wall first, adopting a total station for lofting, and considering the construction error and convergence of a maintenance structure during the foundation pit excavation stage,adopting automobile pumps to symmetrically pour the guide wall, and carrying out form removal when the strength of the guide wall reaches 70%; S2, adopting a grooving machine for grooving of a hydraulic grab, and detecting the depth of the groove section and the perpendicularity of the wall surface of the groove section; S3, sequentially processing the bottom bar, sounding pipe, truss bar, reserved relay, pulping pipe, inclinometer, surface bar and protective layer cushion block of a reinforcement cage; S4, constructing the underground diaphragm wall body, adopting the catheter method for concrete casting, adopting a screw thread to connecting a guide pipe, and adopting an annular rubber blanket to seal the guide pipe; and S5, pulling a fore shaft pipe from the top, and according to the onsite concrete pouring log sheet to calculate the allowed top pulling height of the fore shaft pipe to realize the effect of improving the construction efficiency.

Description

technical field [0001] The invention relates to the technical field of foundation pit construction, in particular to a foundation pit construction method for an underground diaphragm wall. Background technique [0002] The underground diaphragm wall is a continuous reinforced concrete wall built by using continuous unit groove segments built segment by segment in foundation engineering, and is used as a water interception, anti-seepage, load-bearing, and water retaining structure. [0003] Existing can refer to the Chinese patent that notification number is CN108677961A, and it discloses a kind of underground diaphragm wall foundation pit construction method and foundation pit excavation system, and this method comprises the following steps: S1, arrange high-pressure water pump outside foundation pit, arrange drainage Slag and water supply pipelines, set up mud ships, install gravel pumps, build a construction platform in the foundation pit, install relay gravel pumps on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/18
CPCE02D5/18E02D5/182E02D2300/0001
Inventor 陈新兵彭若宏钟凤长司鹏陈忠琦罗建斌温为东陈金波王厦刘俊卿
Owner 深圳市蛇口招商港湾工程有限公司
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