Karst tunnel operation period base plate separation layer rotary spraying grouting technology and grouting device

A grouting device and layer-separation technology, applied in tunnels, tunnel linings, shaft equipment, etc., can solve the problems of non-diffusion of diseased sections, recurrence of floor water gushing, poor reinforcement effects, etc., achieve excellent reinforcement effects, improve soil strength, less stressful effect

Active Publication Date: 2019-07-16
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this kind of grouting method is under the condition of rich water in the separation layer, it is difficult for the grout to displace all the water in the separation layer. If the ideal effect is to be achieved, the grouting pressure must be increased, but the problem it brings is: artificially causing the road surface drumming, cracking
In addition, when the tunnel has a certain slope, this type of traditional grouting method is likely to cause the grout to pool down the slope, which cannot be better diffused in the diseased section, resulting in poor reinforcement effect, and the floor gushing will recur under long-term operation conditions

Method used

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  • Karst tunnel operation period base plate separation layer rotary spraying grouting technology and grouting device
  • Karst tunnel operation period base plate separation layer rotary spraying grouting technology and grouting device
  • Karst tunnel operation period base plate separation layer rotary spraying grouting technology and grouting device

Examples

Experimental program
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Effect test

Embodiment 1

[0044] A rotary jet grouting device for the floor separation layer during the operation period of the karst tunnel, refer to figure 1 , including: a grouting pipe 1, a nut 2, a tray 3, a grout stopper 4, a block 5, a film bag 6, an overflow hole 7, a self-rotating nozzle 8 and a nozzle 9.

[0045] One end of the grouting pipe 1 is open, and the outer surface of the open end is provided with an external thread that cooperates with the nut 2, and the tray 3 is provided with a through hole that can pass through the open end of the grouting pipe. The stopper 5 is fixedly arranged on the outer surface of the grouting pipe 1 , the grout stopper 4 is sleeved on the grouting pipe 1 , and the grout stopper 4 is located between the stopper 5 and the tray 3 .

[0046] The other end of the grouting pipe 1 communicates with the self-rotating nozzle 8, the self-rotating nozzle 8 is provided with a nozzle 9, the self-rotating nozzle 8 rotates under the action of the high-pressure slurry, and...

Embodiment 2

[0049] A karst tunnel floor separation rotary jet grouting process during the operation period, the process includes the following steps:

[0050] (1) Comprehensive exploration of floor abscission layers of karst operating tunnels

[0051] Comprehensively analyze the hydrogeological data during the exploration period and construction excavation period of the karst operation tunnel, and comprehensively analyze the generation mechanism of the floor separation layer 12 from the structural environment, stratum lithology and groundwater; use the combination of geological radar and high-density direct current method The geophysical prospecting method explores the tunnel floor area, roughly determines the spatial distribution range of the floor separation layer 12 and the corresponding general depth, and provides a decision-making basis for the delineation of the grouting treatment target area and the design of the treatment plan.

[0052] (2) Governance plan design

[0053] 1) Dete...

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Abstract

The invention belongs to the technical field of tunnel and underground engineering disaster treatment, and particularly relates to a Karst tunnel operation period base plate separation layer rotary spraying grouting technology and a grouting device. The technology comprises the following steps: A, physical exploration of a separation layer of a base plate: determining the depth, the spatial rangeand the characteristics of the separation layer, and providing a decision basis for the design of a grouting treatment scheme; B, treatment scheme design: determining a treatment area, and completingscheme design, including slurry parameters, grouting parameters and drilling parameters; C, drilling construction: designing and arranging hole sites on site according to the scheme; and D, grouting reinforcement of the separation layer of the base plate: lowering the nozzle end of a separation layer plate rotary spraying grouting device into a drill hole, enabling a rotary sprayer to be located at the depth of the separation layer, and then conducting rotary spraying grouting on broken surrounding rock and holes in the separation layer. By means of the method, directional quick-setting grouting can be conducted on the position of the separation layer, circular diffusion is even, the reinforcing effect is better, and the method is not affected by the tunnel gradient and separation layer cavity water storage.

Description

technical field [0001] The invention belongs to the technical field of tunnel and underground engineering disaster control, and in particular relates to a rotary jet grouting process and a grouting device for a karst tunnel in operation period. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] Floor abscission occurs during the long-term operation of karst tunnels, and tunnels under construction will not have such problems. At present, there are few floor grouting works in China during the operation of karst tunnels. In the actual construction process of the project for many times, the present invention finds that the traditional grouting is indeed difficult ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
CPCE21D11/10
Inventor 张霄杨腾张庆松傅强张红金潘光明
Owner SHANDONG UNIV
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