Deep foundation pit dewatering environment-friendly and energy-saving construction process

It is a technology of environmental protection, energy saving and construction technology, which is applied in the fields of infrastructure engineering, soil protection, construction, etc. It can solve the problems of groundwater treatment and low utilization rate of groundwater resources, and achieve construction safety, good energy saving and environmental protection effects, and high treatment efficiency. Effect

Inactive Publication Date: 2020-08-25
广州金辉建设集团有限公司
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Problems solved by technology

[0004] But in this invention, the groundwater collected in the water collection well is not further treated, and the problem of low utilization rate of groundwater resources needs to be solved urgently

Method used

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  • Deep foundation pit dewatering environment-friendly and energy-saving construction process

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] refer to figure 1 , is a deep foundation pit dewatering environmental protection and energy-saving construction technology disclosed by the present invention, comprising the following steps:

[0036] S1, measuring and setting out, the staff will measure the groundwater around the foundation pit to be excavated and mark the relevant construction location;

[0037] S2. For the construction of the water-stop curtain, after leveling the site, the staff mark the pile position of the high-pressure rotary spraying pile, then start the pile machine and use the double pipe rotary spraying method for construction. The pile diameter determines the construction parameters such as rotary speed of rotary spraying, drilling pipe lifting speed, grouting pressure, mud flow, nozzle diameter, etc. The hole position deviation is not greater than 50mm, and the verticality...

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Abstract

The invention relates to a deep foundation pit dewatering environment-friendly and energy-saving construction process, and belongs to the technical field of underground structure construction. The process comprises the following steps that S1, surveying and setting out is conducted; S2, a water stop curtain is constructed; S3, a dewatering system is excavated; S4, detention pool operation is conducted, a worker uses a water pump to pump underground water in a dewatering well, perform filtering and sand setting treatment on pumped underground water, and then store the underground water in the detention pool outside a foundation pit; S5, the foundation pit is excavated; and S6, the dewatering well is subjected to backfilling, and after the foundation pit is excavated to a designed elevation,the dewatering well and a recharge well are blocked according to the underground water level condition. The method has the effects that in an excavation process of the foundation pit, the probabilitythat the underground water flows into the foundation pit is reduced, the worker does not need to externally connecting municipal pipeline water for use, the energy-saving and environment-friendly effects are good, the phenomena of water and soil loss at the dewatering well, and voids caused by interception of the underground water below the foundation pit are reduced, and construction safety is achieved.

Description

technical field [0001] The invention relates to the technical field of underground structure construction, in particular to an environment-friendly and energy-saving construction technology for deep foundation pit dewatering. Background technique [0002] Foundation pit dewatering means that when the foundation pit is excavated, the groundwater level is higher than the excavation bottom, and the groundwater will continue to seep into the pit. Dewatering work due to pit bottom piping and foundation bearing capacity decline. [0003] In the prior art, such as the Chinese invention patent whose application publication number is CN107700507A discloses a construction method of precipitation in the auxiliary tank of the steel sheet pile water-stop curtain, which includes the following steps: a) setting the wire; Steel sheet pile; c) earthwork excavation; d) backfilling of foundation pit; e) setting tube well dewatering points; f) opening trenches; gutters; h) installing pipes in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/10E02D3/10
CPCE02D3/10E02D19/10
Inventor 周晓马嘉杰朱培明李嘉亮箫文生
Owner 广州金辉建设集团有限公司
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