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Construction method of deep and high permeable layer foundation pit dewatering structure

A construction method and technology of water seepage layer, applied in infrastructure engineering, excavation, construction, etc., can solve the problems of high precipitation costs, great impact on the surrounding soil environment, long construction period of foundation engineering, etc., and achieve the effect of saving costs

Inactive Publication Date: 2018-10-09
NO 2 ENG CO LTD OF CCCC FIRST HIGHWAY ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of water and the long construction period of foundation works in conventional foundation pits with deep and strong permeable layers, the cost of precipitation in the general method is extremely high, and the cost of large volumes can even reach tens of millions, and it has a considerable impact on the surrounding soil environment

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  • Construction method of deep and high permeable layer foundation pit dewatering structure

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Experimental program
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Effect test

Embodiment 1

[0017] A construction method for a foundation pit dewatering structure in a deep and highly permeable water layer, comprising the following steps:

[0018] S1. Vertical curtain construction: In the deep and strong permeable layer foundation, a rectangular vertical curtain 10 is formed through the eccentric occlusal pile foundation construction method;

[0019] Wherein, the eccentric occlusal pile foundation construction method includes the following steps,

[0020] S11. Make a concrete guide wall to ensure the accurate positioning of the occlusal piles, ensure the stability of the drilling rig, and bear the construction load;

[0021] S12. The arrangement of the occlusal piles is an unreinforced ultra-retarded concrete pile (A pile) and a reinforced concrete pile (B pile) at intervals. The A pile is constructed first, followed by the B pile. The construction of Pile B was completed before the coagulation. Both Pile A and Pile B were constructed with full-casing drilling rigs,...

Embodiment 2

[0026] A construction method for a foundation pit dewatering structure in a deep and highly permeable water layer, comprising the following steps:

[0027] S1. Vertical curtain construction: In the deep and strong permeable layer foundation, a rectangular vertical curtain 10 is formed through the eccentric occlusal pile foundation construction method;

[0028] Wherein, the eccentric occlusal pile foundation construction method includes the following steps,

[0029] S11. Make a concrete guide wall to ensure the accurate positioning of the occlusal piles, ensure the stability of the drilling rig, and bear the construction load;

[0030] S12. The arrangement of the occlusal piles is an unreinforced ultra-retarded concrete pile (A pile) and a reinforced concrete pile (B pile) at intervals. The A pile is constructed first, followed by the B pile. The construction of Pile B was completed before the coagulation. Both Pile A and Pile B were constructed with full-casing drilling rigs,...

Embodiment 3

[0035] A construction method for a foundation pit dewatering structure in a deep and highly permeable water layer, comprising the following steps:

[0036] S1. Vertical curtain construction: In the deep and strong permeable layer foundation, a rectangular vertical curtain 10 is formed through the eccentric occlusal pile foundation construction method;

[0037] Wherein, the eccentric occlusal pile foundation construction method includes the following steps,

[0038] S11. Make a concrete guide wall to ensure the accurate positioning of the occlusal piles, ensure the stability of the drilling rig, and bear the construction load;

[0039] S12. The arrangement of the occlusal piles is an unreinforced ultra-retarded concrete pile (A pile) and a reinforced concrete pile (B pile) at intervals. The A pile is constructed first, followed by the B pile. The construction of Pile B was completed before the coagulation. Both Pile A and Pile B were constructed with full-casing drilling rigs,...

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Abstract

The invention relates to a construction method of a deep and high permeable layer foundation pit dewatering structure. The construction method of the deep and high permeable layer foundation pit dewatering structure comprises the steps of constructing a vertical curtain: in a deep and high permeable layer foundation, forming the rectangular vertical curtain through an eccentric occlusion pile foundation construction method; constructing a horizontal seal using concretes for casting to form the horizontal seal base in the rectangular vertical curtain, and bonding the horizontal seal baseand a building foundation bed layer; connecting gaps between the vertical curtain and the horizontal seal base by adopting a pressure grouting manner, wherein a slurry subjected to pressure grouting is the cement-water glass mixed slurry; and after completely curing the cement-water glass mixed slurry, forming the deep and high permeable layer foundation pit dewatering structure. According to theconstruction method of the deep and high permeable layer foundation pit dewatering structure provided by the invention, a foundation pit engineering supporting structure and underground water controlare combined, and a deep and high permeable geological layer adopts the construction of the vertical curtain and the horizontal seal base, so that the foundation pit engineering forms a five-surface impervious structure with double functions of supporting and water resisting, the foundation engineering operation is ensured, cost is greatly saved, and meanwhile, the influence on the environment during construction is almost zero.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to a construction method for a foundation pit dewatering structure in a deep and strong permeable layer. Background technique [0002] During the construction of the foundation pit project, the impact of groundwater will not only deteriorate the construction conditions, but also cause the slope to collapse and the bearing capacity of the foundation to decrease. Therefore, the groundwater must be strictly controlled in the foundation pit project, and the dry operation construction of the foundation project can be obtained by controlling the groundwater, so as to ensure the stability of the foundation pit support and the bottom plate and the safety of the surrounding environment of the foundation pit. For groundwater control in foundation pit engineering, we usually adopt the methods of water collection and drainage, well point precipitation, water interception and recharge, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/18E02D17/04
Inventor 刘成万朋均江绪芫屈小飞
Owner NO 2 ENG CO LTD OF CCCC FIRST HIGHWAY ENG