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Partition support system for large-area deep foundation pit under forward and backward working condition, and construction method thereof

A support system and deep foundation pit technology, applied in infrastructure engineering, excavation, construction, etc., can solve the problems that cannot fully meet the safety requirements of on-site construction and surrounding environment, and reduce the overall exposure time, shorten the flow time, and reduce the length and distance Effect

Active Publication Date: 2015-12-16
THE SECOND CONSTR ENG CO LTD OF CHINA CONSTR THIRD ENG BUREAU +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome that the existing construction methods cannot fully meet the requirements of site construction and surrounding environment safety

Method used

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  • Partition support system for large-area deep foundation pit under forward and backward working condition, and construction method thereof
  • Partition support system for large-area deep foundation pit under forward and backward working condition, and construction method thereof
  • Partition support system for large-area deep foundation pit under forward and backward working condition, and construction method thereof

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Embodiment Construction

[0019] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 As shown, a support system for a large-area deep foundation pit of the present invention under partitioned forward and reverse working conditions includes a TRD water-stop curtain 1, an enclosure pile 2, a three-axis stirring pile 3, a lattice column 4, a column pile 5, The reinforced concrete inner support 6 is characterized in that: a closed water stop wall on the outside of the deep foundation pit is formed by the TRD water stop curtain 1; a row of retaining piles 2 are arranged on the inner side of the TRD water stop curtain 1 as the support system of the deep foundation pit; A triaxial stirring pile 3 is arranged in the middle of the deep foundation pit to divide the deep foundation pit into two regions, and a row of surrounding piles 2 is arranged on one side of the triaxial stirring pile 3; several column piles 5 are arranged in the deep foundation pit, each The column pile 5 is conn...

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Abstract

The invention relates to a partition support system for a large-area deep foundation pit under forward and backward working condition, and a construction method thereof. In the support system, a TRD waterproof curtain forms a closed water barrier wall on the outer side of a deep foundation pit. The inner side of the TRD waterproof curtain is provided with a row of fender posts. The middle part of the deep foundation pit is provided with a tri-axial stirring pile, so as to divide the deep foundation pit into two regions, and a row of fender posts are arranged on a side of the tri-axial stirring pile. The deep foundation pit is internally provided with a plurality of upright piles. Each upright pile is connected with a latticed column. The fender posts are internally provided with a plurality of reinforced concrete internal supports. Through corresponding latticed column, the internal supports bear the internal support which forms the deep foundation pit. The construction method comprises: performing earth excavation and support construction on a region, and performing structural construction from a foundation mat upward, before a first support is dismounted, performing support changing construction of a structural steel diagonal supporting beam, ensuring horizontal stress of the other region to be transmitted to a structural beam plate of the region which is constructed firstly; and performing earth excavation and support construction on the other region from top to bottom.

Description

technical field [0001] The invention relates to a support system and a construction method for a large-area deep foundation pit in a construction project, and in particular to a support system and a construction method for a large-area deep foundation pit under partitioned forward and reverse working conditions. Background technique [0002] At present, large-area deep foundation pits are equipped with multiple reinforced concrete internal supports and multi-layer basement structures. Therefore, during construction, the excavation of the next layer of earthwork is started after the construction of the previous internal support of the entire foundation pit is completed. ; Then, after all the construction of the lower structure is completed, the last inner support is removed. As a result, the time for each support construction and the construction of each layer of structure is longer, so that the entire deep foundation pit is exposed for a long time with a large distance in le...

Claims

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Application Information

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IPC IPC(8): E02D17/04
Inventor 邓兰艳彭文郭剑飞周杨
Owner THE SECOND CONSTR ENG CO LTD OF CHINA CONSTR THIRD ENG BUREAU
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