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Pre-reinforcing process for vertical shaft penetrating through confined water layer

A technology of confined water layer and confined water, which is applied in shaft equipment, water supply equipment, wellbore lining, etc., can solve problems such as waste, prevent water gushing and sand gushing, prevent safety instability, and solve safety hazards

Pending Publication Date: 2022-07-01
BEIJING UNI-CONSTR GRP CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

This invention will consume more reinforcing material to form the overall structure of the reinforcing body, and the formed reinforcing body structure is not completely used for the reinforcing effect, and most of the material in the middle must be removed to form the shaft structure, which obviously causes a greater degree of waste

Method used

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  • Pre-reinforcing process for vertical shaft penetrating through confined water layer
  • Pre-reinforcing process for vertical shaft penetrating through confined water layer
  • Pre-reinforcing process for vertical shaft penetrating through confined water layer

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Embodiment Construction

[0053] The following detailed description is given in conjunction with the accompanying drawings.

[0054] The invention provides a method for constructing a shaft in a confined water layer based on non-drop drainage, which adopts the method of pre-reinforcement and then excavation for continuous operation, so that the shaft can pass through the confined water layer and avoid water gushing caused by the action of the confined water. phenomenon of sand.

[0055] The principle of the present invention is as follows: figure 2 As shown, the water-proof and bottom-sealing reinforcement is realized by artificial grouting, an artificial water-proof reinforcement structure is formed at the bottom of the shaft, and a closed longitudinal reinforcement structure is formed in the peripheral range of the shaft to resist water pressure.

[0056] During trenchless, γH 1 =γ ω h;

[0057] Among them, H 1 is the thickness of the impermeable layer after the shaft is excavated, γ is the wei...

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Abstract

The invention relates to a pre-reinforcing process for a vertical shaft penetrating through a confined aquifer, which at least comprises the following steps of: before a longitudinal reinforcing structure (3) forming the outline of the vertical shaft and a waterproof reinforcing structure (4) connected with the longitudinal reinforcing structure (3) into a whole are arranged; at least one temporary bottom sealing structure (1) matched with the size of the vertical shaft in advance is arranged at a first position which is not influenced by a confined water layer, and after the outline of the vertical shaft is arranged, the temporary bottom sealing structure (1) is broken, and the vertical shaft is excavated to a preset distance which does not penetrate through the waterproof reinforcing structure (4). According to the process method, the pre-excavation section of the vertical shaft is reinforced in advance, the confined water layer is blocked, then the interior of the reinforced section is excavated, the depth of the vertical shaft is gradually increased, each excavation section is located in a waterproof and reinforced protective layer, and therefore the influence of water pressure of the confined water layer is avoided.

Description

[0001] The present invention is a divisional application for an invention patent with an application number of 202010958047.4 and an application date of September 11, 2020. technical field [0002] The invention relates to the technical field of subway construction, in particular to a pre-reinforcing process for a shaft passing through a confined water layer. Background technique [0003] The gradual rise of the groundwater level in the northern region has brought certain difficulties to the current municipal subway construction; in order to protect the water source in the green and environmental protection construction, the pumping and drainage of groundwater has been prohibited, which further aggravates the difficulty of the current shaft construction. At present, there are many construction methods for unpressurized water-rich strata, but there are relatively few excavation techniques for shafts in confined water strata. [0004] The current prior art generally uses preci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D5/11
CPCE03B3/10E02B3/12
Inventor 张功王贺旺李皓
Owner BEIJING UNI-CONSTR GRP CO LTD
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