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A kind of advanced support device for water-saturated plastic clay and using method

A technology of advanced support and plasticity, which is used in earth-moving drilling, shaft equipment, wellbore lining, etc., can solve the problems such as the ineffective pre-consolidation of the surrounding rock of the tunnel, the difficulty of effective diffusion of cement slurry, and the easy collapse of mud. To achieve the effect of simple structure, simple construction and cost reduction

Active Publication Date: 2022-02-01
CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an advanced support device for water-saturated plastic clay and its use method. The technical problem to be solved is that it is difficult for the cement slurry conveyed by traditional small conduits or pipe sheds to be effectively supported by the geological conditions of water-saturated plastic clay. Diffusion, the tunnel surrounding rock cannot be effectively pre-consolidated, and it is easy to collapse during the excavation process. The rapid consolidation and advanced pre-reinforcement of saturated plastic clay can avoid the collapse of the tunnel surrounding rock

Method used

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  • A kind of advanced support device for water-saturated plastic clay and using method
  • A kind of advanced support device for water-saturated plastic clay and using method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as Figure 1~2 As shown, an advanced support device for saturated plastic clay includes a guide cap 1 and a closing plate 2. The guide cap 1 and the closing plate 2 are fixedly connected by a connecting piece 3, and also include a The sealing member 4, the guide cap 1, the closing plate 2 and the sealing member 4 enclose a premix chamber, and the premix chamber is used to accommodate the mixture of dry cement powder and sand.

[0030] In this embodiment, the shape of the guide cap 1 is conical, and the guide cap 1 may be a combination of a circular plate and a cone, and a through hole is opened on the circular plate, and one end of the connecting piece 3 passes through the through hole and is inserted into the In the cone, the connecting piece 3 is a round rod, the axis of the round rod coincides with the center line of the cone, and the connecting piece 3 is vertically connected with the closing plate 2; further, the connecting piece 3 can be an anchor rod, and th...

Embodiment 2

[0035] Such as Figure 1~2 As shown, this embodiment is further defined on the basis of Embodiment 1, a method for using an advanced support device for saturated plastic clay, the steps include:

[0036] S1. Fill the mixture of dry cement powder and sand into the premix chamber of the advance support device;

[0037] S2. Knock the tail end of the sealing member 4 to drive the advance support device into the surrounding rock;

[0038] S3. After using the jack to support the advance support device, slowly pull the sealing member 4 out of the surrounding rock. In this step, use the jack to cooperate with the excavator to slowly pull the sealing member out of the surrounding rock through the pull ring 6;

[0039] In step S1, from the front end of the seal 4, put the connector 3 with the closing plate 2, the positioning ring 5 and the guide cap 1 into the seal 4, the guide cap 1, the seal 2, the connector 3 and the seal 4 The four are combined into an advanced support device, and...

Embodiment 3

[0043] Such as Figure 1~2 As shown, this embodiment is further defined on the basis of Embodiment 1, a method for using an advanced support device for saturated plastic clay, the steps include:

[0044] S1. Fill the mixture of dry cement powder and sand into the premix chamber of the advance support device;

[0045] S2. Knock the tail end of the sealing member 4 to drive the advance support device into the surrounding rock;

[0046] S3. After using the jack to support the advance support device, slowly pull the sealing member 4 out of the surrounding rock. In this step, use the jack to cooperate with the excavator to slowly pull the sealing member out of the surrounding rock through the pull ring 6;

[0047] S4. When the length of the sealing member 4 leaking out of the surrounding rock is 2 / 3 of its own length, use an excavator to pull the sealing member 4 out of the surrounding rock at one time;

[0048] First use a jack to slowly pull the seal 4 out of the surrounding ro...

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Abstract

The invention discloses an advanced support device for water-saturated plastic clay and its use method, which includes a guide cap and a closing plate, the guide cap and the closing plate are fixedly connected through a connecting piece, and a sealing piece covered on the connecting piece , the guide cap, the closing plate and the sealing member enclose a premix chamber, which is used to accommodate the mixture of cement dry powder and sand; compared with the existing advanced support method, the present invention has carried out extremely Great improvement, effectively combining the characteristics of water-saturated plastic clay, absorbing the moisture in the clay through the mixture of cement dry powder and sand and hardening it into a reinforced concrete column, and the clay around the column will be consolidated to a certain extent after dehydration, and the strength of the clay will be improved. , the combined effect of clay and reinforced concrete column after the strength is increased, improves the integrity and self-stability of the surrounding rock, and realizes the function of advanced pre-reinforcement.

Description

technical field [0001] The invention relates to the technical field of tunnel advance support, in particular to an advance support device for saturated plastic clay and a use method. Background technique [0002] In the process of tunnel construction, advanced support is required to ensure the stability of excavation and avoid tunnel collapse; for the advanced support technology of saturated plastic clay, the traditional small conduit or pipe shed advanced grouting is still used at present. Both methods need to drill holes in the steel pipe first, then drive the hollow steel pipe into the surrounding rock of the tunnel, and then perform pressure grouting on the empty pipe. The cement slurry penetrates into the cracks of the surrounding rock to consolidate the rock mass and improve the integrity of the rock mass. It plays the role of pre-reinforcement in advance; due to the low porosity and strong water resistance of water-saturated plastic clay, it is difficult for the cemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21D11/10
CPCE21D9/001E21D11/10
Inventor 徐自享郭宏丽
Owner CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE