Multi-wave stacking intermittent recharge construction method based on water level control

A water level control, wave-type technology, applied in the field of multi-wave superimposed intermittent recharge method based on water level control, can solve problems such as low recharge efficiency, foundation pit safety, and difficulty in lowering the water level in the pit, achieving strong adaptability, The principle is clear and the effect of improving the recharge efficiency

Inactive Publication Date: 2012-07-18
TONGJI UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, the existing groundwater recharge method has the following problems: In the foundation pit dewatering and recharge project, the single-wave long-term recharge method is generally used, which has problems suc

Method used

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  • Multi-wave stacking intermittent recharge construction method based on water level control
  • Multi-wave stacking intermittent recharge construction method based on water level control
  • Multi-wave stacking intermittent recharge construction method based on water level control

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Embodiment 1

[0025] Embodiment 1: Taking the field single well reinjection test in a certain area as an example, the specific application is carried out according to the following steps:

[0026] Step 1, on-site geological exploration: within the influence range of the recharge test, the stratum is divided into 8 layers, which are ① the artificial filling floor elevation is 2.03m, and the layer thickness is 1.5m; ② 1 The silty clay floor of the first layer has an elevation of 0.63m and a layer thickness of 1.4m;② 3 The elevation of the sandy silt floor of the first layer is -3.97m, and the thickness of the layer is 4.6m; 1-1 Layer clay floor elevation -18.17m, layer thickness 3.2m; ⑤ 1-t Layer sandy silt floor elevation -24.97m, layer thickness 9.7m; ⑤ 2 Layer of clayey silt sandwiched with silty clay floor elevation -48.07m, layer thickness 23.1m. The target layer of recharge is ⑤ 1-t layer of sandy silt. The constructed micro-confined aquifer recharge well has a depth of 35.5m, a fi...

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Abstract

The invention relates to a multi-wave stacking intermittent recharge construction method based on water level control. By the aid of the multi-wave stacking intermittent recharge construction method, recharge efficiency is effectively improved to the greatest extent on the premise that a recharge target is achieved. The method includes the specific steps: (1) determining relevant hydrogeology parameters of a precipitation recharge target stratum by means of field pumping tests; (2) inversing parameters of relevant strata by the aid of numerical simulation software and determining the parameters of the target stratum; (3) carrying out field recharge tests for single wells and group wells and numerical simulation, verifying a model, and simultaneously determining the optimal recharge mode, recharge frequency and single recharge time interval; (4) realizing numerical simulation of a recharge scheme and optimizing the recharge scheme; and (5) carrying out field recharge and simultaneously arranging a plurality of observation well according to needs. The relevant hydrogeology parameters include a permeation coefficient, a water storage coefficient and the like. A principle of the method is definite, the method is high in applicability, recharge efficiency can be improved under conditions of original recharge equipment by means of changing an original recharge construction method, simultaneously, recharge is controlled by means of observing recharge water level via the observation wells, dual purposes of controlling surface subsidence and guaranteeing pit safety are achieved to the greatest extent, and the working method is economical.

Description

technical field [0001] The invention belongs to the field of deep foundation pit dewatering mainly used in municipal engineering, industrial and civil construction projects, and in particular relates to a multi-wave superimposed intermittent recharge construction method based on water level control. Background technique [0002] At present, in the construction of more and more ultra-large and ultra-deep foundation pits, it is unavoidable to extract underground confined water for a long time during the excavation of the foundation pit. The long-term pumping of groundwater will have a strong disturbance to the surrounding geological environment, mainly manifested in: the ground around the foundation pit will subside, which will have a serious impact on the surrounding original buildings, underground pipelines, rail transit, etc. Therefore, in order to reduce the disturbance of the deep foundation pit dewatering project to the surrounding geological environment and reduce the a...

Claims

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Application Information

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IPC IPC(8): E02D3/00G06F19/00
Inventor 王建秀吴远斌司鹏飞谷雪影吴治厚
Owner TONGJI UNIV
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