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A mold bag filling type anchor grouting device and method

A grouting device and filling technology, which is applied in the direction of earthwork drilling, installation of bolts, mining equipment, etc., can solve the problems of low strength of tunnel surrounding rock, decline of anchoring quality, easy occurrence of surrounding rock collapse, etc., and improve the quality of the project and technical level, the effect of increasing the grouting pressure

Active Publication Date: 2019-03-22
INST OF MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the surrounding rock strength of the tunnel in the water-rich fractured zone is low, and it is prone to safety hazards such as surrounding rock collapse, debris flow, and tunnel water inrush.
Anchor bolt grouting is one of the commonly used reinforcement measures, but conventional bolt grouting fluid is ordinary cement mortar, which is lost in large quantities under groundwater erosion conditions, resulting in a significant drop in anchorage quality
In addition, due to the high fluidity of cement mortar, the grouting pressure is usually lower than 0.4MPa, which cannot effectively fill and compact the surrounding rock in the broken zone.

Method used

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  • A mold bag filling type anchor grouting device and method
  • A mold bag filling type anchor grouting device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: see figure 1 , a mold bag filling type anchoring grouting device, comprising: orifice sealing steel pipe 1, wall eyelet 2, constant pressure occluder A, orifice sealing mold bag 4, grouting steel pipe 5, constant pressure occluder B, Reinforcing rib 6, hole bottom anchor steel pipe 7, hole bottom anchor mold bag 8;

[0029] The orifice sealing steel pipe 1, the grouting steel pipe 5, and the hole bottom anchoring steel pipe 7 are seamless steel pipes, fixedly connected, and the orifice sealing steel pipe (1) and the grouting steel pipe (5 ) into the constant pressure choke A at the connection of the grouting steel pipe (5) and the anchor steel pipe (7) at the bottom of the hole into the constant pressure choke B;

[0030] The length of the orifice sealing steel pipe 1 is consistent with the depth of the orifice sealing area, and is used to inject pure cement slurry into the orifice sealing mold bag 4 through the wall eyelet 2;

[0031] The wall eyelets 2...

Embodiment 2

[0039] Example 2: see figure 2 , 2. a kind of mold bag filling type anchoring grouting method, uses a kind of mold bag filling type anchoring grouting device described in embodiment 1, comprises the following steps:

[0040] A. According to the exploration data of the loose surrounding rock in the broken zone and the surrounding rock reinforcement design index, calculate the hole sealing mold bag size, anchor grouting drilling depth, hole bottom anchor mold bag size, injection The size of the reinforcement rib of the slurry pipe, the number of drilling holes and the spacing of the drilling holes;

[0041] B. Drill holes according to the designed anchor hole position, select a drill with a diameter of Φ70mm to Φ200mm to drill the hole, and drill the hole once to the designed anchor depth;

[0042] C. Assemble the anchoring grouting pipe; first connect the orifice sealing steel pipe, the grouting steel pipe and the anchoring steel pipe at the bottom of the hole, and place a co...

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Abstract

The invention discloses a mold-bag-filling-type anchor grouting device which comprises a hole opening hole sealing steel pipe (1), wall surface patterned holes (2), a constant pressure stopper A (3),a hole opening hole sealing mold bag (4), a grouting steel pipe (5), a constant pressure stopper B (6), reinforcing ribs (7), a hole bottom anchoring steel pipe (8) and a hole bottom anchoring mold bag (9). According to the mold-bag-filling-type anchor grouting device, an anchoring rod is divided into three parts of the hole opening hole sealing steel pipe, the grouting steel pipe and the hole bottom anchoring steel pipe, the mold bags, the reinforcing ribs and the wall surface patterned holes are arranged / formed, and by combining the characteristics that the mold bags are expanded during grouting and grout leakage is not prone to occurring, hole bottom anchoring and hole opening filling closing are achieved; through the wall surface patterned holes, cement grout and solidification grout are effectively grouted into loose wall rock; and thus, the grouting pressure is effectively increased, the broken loose wall rock is quickly filled, grouting liquid is prevented from being subjected to underground water erosion, and finally the firm mold-bag-filling-type anchor rod is formed, so that the engineering quality and the technical level are comprehensively improved.

Description

technical field [0001] The invention belongs to the technical field of engineering reinforcement grouting, and in particular relates to a bag-filled anchoring grouting device and method. Background technique [0002] At present, the surrounding rock strength of the tunnel in the water-rich fracture zone is low, and there are prone to safety hazards such as surrounding rock collapse, debris flow, and tunnel water inrush. Bolt grouting is one of the commonly used reinforcement measures, but conventional bolt grouting is common cement mortar, which is lost in large quantities under groundwater erosion conditions, resulting in a significant drop in anchorage quality. In addition, due to the high fluidity of cement mortar, the grouting pressure is usually lower than 0.4MPa, which cannot effectively fill and compact the surrounding rock in the broken zone. Contents of the invention [0003] The purpose of the present invention is to provide a mold bag filling type anchor grouti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D20/02
CPCE21D20/021E21D20/028
Inventor 程鹏达李世海冯春杨田
Owner INST OF MECHANICS CHINESE ACAD OF SCI
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