A composite flexible support integrated construction method for building deep foundation pit engineering

A construction method and technology of deep foundation pits, which are applied in basic structure engineering, construction, excavation, etc., can solve problems such as low construction efficiency and poor support effect, and achieve the effects of improving construction efficiency, convenient construction, and improving self-bearing capacity

Active Publication Date: 2021-06-08
NANCHANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Flexible support structures are widely used in deep foundation pit engineering. Different from rigid supports, flexible support structures in the prior art are generally composed of rows of piles or continuous walls, and their lower ends are embedded in the soil. And through the anchor rod or internal support system to obtain additional support, its working state is generally elastic embedding, the construction of flexible support in the prior art is generally on-site construction, the construction efficiency is low, and adjacent rows of piles or continuous walls There is a rigid connection between them, and the supporting effect is poor

Method used

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  • A composite flexible support integrated construction method for building deep foundation pit engineering
  • A composite flexible support integrated construction method for building deep foundation pit engineering
  • A composite flexible support integrated construction method for building deep foundation pit engineering

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Effect test

Embodiment 1

[0033] An integrated construction method of composite flexible support for deep foundation pit engineering provided by the invention comprises the following steps:

[0034] S1, leveling the foundation pit slope 1;

[0035] S2, quickly spray the primary concrete 2 on the slope after step S1 trimming, and seal the foundation pit slope in time;

[0036] S3. After the concrete in step S2 is solidified, drill holes according to the support design requirements, inject cement slurry into the anchor hole, and insert the anchor rod 3;

[0037] S4. Install prefabricated steel wire mesh frames 4 on the foundation pit slope 1 after the construction of anchor rods 3 is completed. Two adjacent steel wire mesh frames 4 are connected to the ends of anchor rods 3 through connecting components. The insertion end 6 is reserved, and the insertion end 6 is inserted at the bottom of the foundation pit during construction;

[0038] S5. Secondary spraying of concrete on the installed prefabricated ...

Embodiment 2

[0040] On the basis of Embodiment 1, in order to enhance the effect of flexible support, the connection assembly of this embodiment includes a butterfly member 8 arranged at the outer end of the anchor rod 3, and the outer edges on both sides of the butterfly member 8 are V-shaped edge, described V-shaped edge comprises first hypotenuse 81 and second hypotenuse 82; The wire mesh frame 4 that is positioned at butterfly member 8 both sides is provided with V-shaped member 9, and the outer edge of V-shaped member 9 includes The third hypotenuse 91 and the fourth hypotenuse 92, the third hypotenuse 91 is slidingly connected with the first hypotenuse 81, the fourth hypotenuse 92 and the second hypotenuse 82 are provided with a set of limit teeth 10, The stop teeth 10 are used to limit the V-shaped member through the stop teeth 10 provided on the fourth bevel 92 and the second bevel 82 after the third bevel 91 slides along the first bevel 81 to the fourth bevel 92 9 slips.

[0041]...

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Abstract

The invention discloses a composite flexible support integrated construction method for building deep foundation pit engineering, and belongs to the technical field of foundation pit support. The construction method comprises the following steps: rapidly spray concrete on the repaired slope, and seal the foundation pit slope in time; after the concrete is solidified, drill holes, inject cement slurry into the anchor hole, and insert the anchor rod; The prefabricated steel wire mesh frame is installed on the slope of the foundation pit, and the two adjacent steel wire mesh frames are connected to the end of the anchor rod through the connecting component. The bottom of each steel mesh frame frame is reserved with an insertion end, and the insertion end is inserted in the construction during construction. The bottom of the foundation pit; secondary shotcrete on the installed prefabricated wire mesh frame. In the present invention, the steel wire frame for support, the elastic filler for buffering, the bolt for reinforcement and shotcrete together constitute a composite flexible support system, which greatly changes the support effect, and the prefabricated components make construction convenient , efficient.

Description

technical field [0001] The invention relates to the technical field of foundation pit support, in particular to an integrated construction method of composite flexible support for building deep foundation pit engineering. Background technique [0002] The foundation pit support is to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit, and the support, reinforcement and protection measures are adopted for the side wall of the foundation pit and the surrounding environment. [0003] With the increasing number of high-rise buildings, the importance of foundation pit engineering is highlighted. Since most foundation pits are constructed in buildings with dense population, dense buildings, and dense underground and ground municipal pipelines, the stability and displacement of foundation pits require control. Very strict, with the full use of the underground space, the depth of the foundation pit continues to increase,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 曾开华李汉龙田海李学军骆禹锦
Owner NANCHANG INST OF TECH
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