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Foundation pit groundwater recharge system

A groundwater and foundation pit technology, which is applied in infrastructure engineering, soil protection, construction, etc., can solve problems such as blockage of recharge wells and affect the effect of recharge, and achieve the goals of reducing blockage, improving recharge effect, and optimizing water quality Effect

Active Publication Date: 2017-10-20
SHANGHAI CHANGKAI GEOTECHN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, after the existing groundwater recharge system has been used for a period of time, it is easy to block the recharge well due to suspended solids, air bubbles, chemical precipitation, microbial growth, and fine particle media in the aquifer itself, which affects the recharge effect.

Method used

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  • Foundation pit groundwater recharge system
  • Foundation pit groundwater recharge system
  • Foundation pit groundwater recharge system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment relates to a groundwater recharge system for foundation pits, and its structural diagram is as follows image 3 As shown, it includes a pumping well 1, a primary water storage tank 2, an aeration unit, a primary filter 5, a secondary filter 6, a secondary water storage tank 7 and a recharge well 8 connected in sequence, and also includes a backwashing unit, The control processing unit and the water level monitoring unit; the backwashing unit is connected with the primary filter 5 and the secondary filter 6 respectively; the water level monitoring unit is connected with the pumping well 1, the secondary water storage tank 7 and the recharge well 8 respectively The control processing unit includes a pumping control subunit connected to the pumping well 1, a water treatment control subunit connected to the recharge water quality treatment system, and a recharge and flow control subunit connected to the recharge well 8. As a preferred implementation of this ...

Embodiment 2

[0089] This embodiment relates to a foundation pit groundwater recharge system, and its system composition and process operation are the same as those in Embodiment 1. The difference lies in that the choice of filter fillers in the primary and secondary filters in this embodiment is different from that in Embodiment 1. In this example, on the basis of Example 1, in combination with the groundwater quality of the foundation pit, the filtering effect and the filtering cost, the following selection schemes for filter packings are determined:

[0090] Option One:

[0091] Primary filter: The quartz sand filter material layer (thickness = 1.8m) is laid with graded quartz sand filter material (d = 0.5-1.2mm, d = 1-2mm, volume ratio 1:1.5).

[0092] Secondary filter: with embodiment 1.

[0093] Option II:

[0094] Primary filter: with embodiment 1.

[0095] Secondary filter: such as Figure 8 As shown, on the filter screen 611, the SS filter material filter layer 612 of 1.2m, th...

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Abstract

The invention discloses a foundation pit groundwater recharging system. The foundation pit groundwater recharging system comprises a back wash unit, a water pumping well, a one-level water storage tank, an aeration unit, a one-level filter, a two-level filter, a two-level water storage tank and a recharge well. The water pumping well, the one-level water storage tank, the aeration unit, the one-level filter, the two-level filter, the two-level water storage tank and the recharge well are sequentially connected. The back wash unit is connected with the one-level filter and the two-level filter. The foundation pit groundwater recharging system further comprises a control treatment unit and a water level monitoring unit which is connected with the water pumping well, the two-level water storage tank and the recharge well. The control treatment unit comprises a water pumping control subunit connected with the water pumping well, a water treatment control subunit connected with a recharge water quality treatment system and a recharge and flow control subunit connected with the recharge well. According to the foundation pit groundwater recharging system, the effect that land subsidence surrounding a foundation pit due to rainfall is avoided can be ensured, and meanwhile, optimization of recharge water quality is further really achieved. After recharge of recharge water is finished, drop of the water level of regional groundwater, water quality reduction and pollution do not occur, blocking of the recharge well is also avoided, and the recharge effect is good.

Description

technical field [0001] The invention belongs to the technical field of foundation pit engineering in rock engineering in the field of municipal and construction engineering, relates to the technical field of foundation pit dewatering and recharge technology, and in particular relates to a groundwater recharge system for foundation pits. Background technique [0002] The environmental problems related to the foundation pit engineering mainly include: ground subsidence around the pit, drop of groundwater around the pit, lateral movement of the soil around the pit to the inside of the pit, settlement, inclination and cracks of adjacent buildings (structures), integrated pipelines around the pit Subsidence and displacement, etc. The excavation of the foundation pit and the dewatering of the foundation pit are the main causes of environmental problems around the pit. The main influencing factors of deformation, and the decrease of groundwater level outside the range of 2 times t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/10E02D19/10
CPCE02D3/10E02D19/10
Inventor 瞿成松张晓晖徐丹牛磊陈晖毛喜云李宏军
Owner SHANGHAI CHANGKAI GEOTECHN ENG
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