Super large super deep basement ground pit construction method

A construction method and basement technology, applied in infrastructure engineering, excavation, construction, etc., can solve problems such as the inapplicability of foundation pits in super-large and super-deep basements, and achieve the effects of solving construction safety problems, increasing utilization rates, and reducing total investment

Active Publication Date: 2015-09-30
THE SECOND CONSTR ENG CO LTD OF CHINA CONSTR THIRD ENG BUREAU
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  • Application Information

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Problems solved by technology

This system is suitable for general large-scale basement pits, but not suitable for super-large and ultra-deep basement pits

Method used

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  • Super large super deep basement ground pit construction method
  • Super large super deep basement ground pit construction method
  • Super large super deep basement ground pit construction method

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Embodiment Construction

[0016] The present invention is described in detail below in conjunction with accompanying drawing:

[0017] Such as figure 1 , figure 2 , image 3 , Figure 4 As shown, a partition construction method of super large and super deep basement pit is characterized in that it is carried out according to the following steps:

[0018] Step (1) Set up a "two walls in one" underground diaphragm wall 3 around the foundation pit of the super-large and deep basement as the foundation pit enclosure, and set a temporary connecting wall 1 and bored pile row 2 in the foundation pit to integrate the whole It is divided into three parts, and the two sides are subdivided for construction at the same time, and the middle area is used as a buffer zone for construction;

[0019] Step (2) Set ring support 4 during the excavation of the foundation pit on both sides, that is, zone I and zone II, and transmit the horizontal force around the foundation pit to the buffer zone, zone III, through the...

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Abstract

The invention relates to a super large super deep basement ground pit construction method comprising the following steps: using underground diaphragm wall and drilling perfusion campsheds to divide a whole body into three parts, wherein two side subareas are simultaneously in consequence construction, and a middle zone is constructed later so as to serve as a buffer area; in a construction process, an annular support and change-support beams can transfer horizontal forces received by the ground pit to the buffer area, thus ensuring safety and stability of the ground pit in an excavation process; after two side subareas basement structure construction is completed, the buffer area basement ground pit is excavated, and a first-support-then-excavation principle is followed in the excavation process, after the buffer area basement structure construction is completed, change-support beams in each layer are dismounted in sequence from top to bottom. In the construction process, the method uses the annular support and the change-support beams to cancel the horizontal force received by the ground pit, thus ensuring whole stability of the ground pit. The method can solve the construction safety problems of the super large super deep ground pit, can greatly reducing technical and construction difficulties of the super large ground pit, and thus improving ground pit construction efficiency.

Description

[0001] The invention relates to a construction method for an ultra-large and ultra-deep basement pit. It is mainly used in the construction of ultra-large and ultra-deep basement structures. Background technique [0002] In current construction projects, the existing basement foundation pit support system often adopts the "support first and then excavate ring beam support system", that is, the underground diaphragm wall and ring beam support system are constructed before excavation of the foundation pit, and then excavated. This system is suitable for general large-scale basement pits, but not suitable for super-large and ultra-deep basement pits. Contents of the invention [0003] The purpose of the present invention is to overcome the time problems and shortcomings of the above-mentioned prior art, and provide a construction method suitable for super-large and super-deep basement pits. The pit is divided into three as a whole, and the two sides are subdivided for construc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02E02D17/04
Inventor 戴旭强刘波杨利民彭建锋黎平袁小兵曾寅陈颖陈广照
Owner THE SECOND CONSTR ENG CO LTD OF CHINA CONSTR THIRD ENG BUREAU
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