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Foundation pit supporting structure and foundation pit supporting method

A technology for foundation pit support and foundation pit, which is applied in foundation structure engineering, excavation, construction, etc.

Pending Publication Date: 2019-03-01
SHANXI CONSTR ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention aims to provide a foundation pit support structure and a foundation pit support method to solve the support problem of ultra-deep foundation pits with a high groundwater level in the prior art

Method used

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  • Foundation pit supporting structure and foundation pit supporting method
  • Foundation pit supporting structure and foundation pit supporting method
  • Foundation pit supporting structure and foundation pit supporting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A foundation pit 020 support structure, which can be constructed while draining water during the construction process, and does not occupy the internal space of the foundation pit 020 after the support structure is formed, and is especially suitable for ultra-deep, high groundwater level, and relatively small base area. The small foundation pit 020 is supported.

[0038] Please refer to the attached figure 1 And attached image 3 , the foundation pit 020 includes an inner wall and a bottom. For the convenience of description, the inner wall of the foundation pit 020 is referred to as the foundation wall, and the bottom of the foundation pit 020 is referred to as the base. The foundation pit 020 is bounded by the base, including an excavation part and an underground part, wherein the underground part is located below the base, the excavation part is above the base, and the base wall is located in the excavation part.

[0039] Refer to attached image 3 As shown, the exc...

Embodiment 2

[0048] On the basis of embodiment 1, further, with reference to the attached figure 1 And attached image 3 As shown, the outer soil of the foundation pit 020 is provided with a water-stop curtain 100, the top of the foundation pit 020 is provided with a soil nail wall 200, and the soil nail wall 200 is slope-graded. An unloading platform 300 is set between the foot of the slope 200 and the base wall, and the slope of the unloading platform 300 is smaller than that of the soil nail wall 200. In this implementation, the unloading platform 300 is a platform.

[0049] The water-stop curtain 100 pre-consolidates the soil around the foundation pit 020 to form a safety protection, and separates the soil around the foundation pit 020, that is, the part close to the foundation wall and the part far away from the foundation wall. The water-stop curtain 100 Separate the soil away from the foundation wall to prevent the water from far away from continuously flowing to the foundation pit...

Embodiment 3

[0059] A support method for foundation pit 020, used for supporting foundation walls, especially suitable for supporting ultra-deep foundation pit 020 with high groundwater level and large amount of groundwater, further, it is suitable for high groundwater level, groundwater Support for foundation pit 020 with large volume, ultra-deep and small base area.

[0060] The foundation pit 020 supporting method includes a first process and a second process.

[0061] first process

[0062] Set the water-stop curtain 100:

[0063] There are various forms of the water-stop curtain 100 , and the water-stop curtain 100 of a three-axis stirring pile is used in this embodiment. Using a three-axis mixing pile machine, the water-stop piles are drilled and filled with repeated casing drilling techniques. The water-stop piles are closely connected to form a water-stop curtain 100. The bottom of the water-stop curtain 100 is lower than the design base, and the bottom of the water-stop curtain ...

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Abstract

The invention relates to the field of ultra-deep foundation pit supporting at underground-water-rich areas, in particular to a foundation pit supporting structure and a foundation pit supporting method. Supporting piles are arranged on the inner wall of a foundation pit; at least part of each supporting pile is buried underground; prestress anchor cables are arranged at an excavation part; water drainage wells are arranged at a soil body at the periphery of the foundation pit; each prestress anchor cable comprises a fixed end which is fixed on the inner wall of the foundation pit and an anchoring end which is deep in the soil body; the water drainage wells are arranged at positions close to the anchoring ends; and the distance between the well bottom of each water drainage well to the ground is greater than or equal to the distance between the corresponding anchoring end to the ground. According to the foundation pit supporting structure and the foundation pit supporting method, supporting of the ultra-deep foundation pit with a high underground water level is realized through the supporting structure consisting of the supporting piles, the prestress anchoring cables and the waterdrainage wells; the space in the foundation pit is not occupied by the supporting structure, so that deep foundation pit construction work for foundation pits with small areas is facilitated; besides,disassembly is not need, and later-period construction is not affected; and a later-period supporting effect is realized for the foundation pit.

Description

technical field [0001] The invention relates to the field of ultra-deep foundation pit support with a lot of groundwater, in particular to a foundation pit support structure and a foundation pit support method. Background technique [0002] At present, in the support of ultra-deep foundation pits, the underground diaphragm wall is generally installed first, and then the internal support structure is set inside the foundation pit for support. The internal support structure set by this support method will occupy the internal space of the foundation pit and affect the In the later stage of construction, sometimes the installation needs to be dismantled before construction, which prolongs the construction period and is not conducive to the operation of deep foundation pits with small base areas. [0003] However, for ultra-deep foundation pits with high groundwater levels and abundant water, the excavation and drainage construction of the foundation pits are relatively difficult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04E02D19/06E02D19/10E02D19/18
CPCE02D17/04E02D19/06E02D19/10E02D19/18
Inventor 陈俊杰崔峰李龙刘勇张斌闫恺卫剑鹏刘帅帅成雷生
Owner SHANXI CONSTR ENG CO LTD
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