Device and method for strengthening different fracture zones of deep rock mass with expansion agent head-enlarging effect

A technology of expansion agent and rock mass, which is applied in the field of new-type expansion anchorage, can solve the problems of spray body falling off, serious damage, high construction cost, etc., and achieve the effect of increasing the thickness of the protective layer, resisting the corrosion of steel bars, and saving engineering costs

Inactive Publication Date: 2018-12-18
CHINA THREE GORGES UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The large deformation load of the surrounding rock makes it difficult to support the partitioned fractured surrounding rock, and the damage is serious. The anchorage section of the anchor bolt is too long (up to 6-12m), and the pullout resistance per unit anchor length is low. Non-linear deformation damage such as roof caving, rib and bottom drum, high repair rate, and increased support costs
And the construction cost is too high and the construction period is long

Method used

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  • Device and method for strengthening different fracture zones of deep rock mass with expansion agent head-enlarging effect
  • Device and method for strengthening different fracture zones of deep rock mass with expansion agent head-enlarging effect

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Embodiment 1

[0037] refer to Figure 1-2 A device for reinforcing different fractured areas of deep rock mass by utilizing the expansion agent head expansion effect, which includes a deep rock mass 1, and there are different fractured rock mass areas 2 and intact rock mass areas 3 inside the deep rock mass 1; The inside of the broken rock mass area 2 and the complete rock mass area 3 are anchored with bolts 9, and the inside of the broken rock mass area 2 with different depths or layers where the anchor bars 9 are located is poured with expansive cement slurry with different contents of expansion agent to form different Deep anchoring body, and then anchor the anchor rod 9 inside the deep rock mass 1; the cushion layer 4 is arranged on the anchor rod 9 and at the edge of the fractured rock mass area 2. By adopting the reinforcement device of the above structure, in the construction process, by forming anchor bodies of different depths in the fractured rock mass area 2, and then reinforcing...

Embodiment 2

[0046] Any method for reinforcing different fractured areas of deep rock mass by using expansion agent head expansion effect, is characterized in that it includes the following steps:

[0047] Step1: Material preparation: ordinary cement mortar, expansion agent, anchor cable, anchor rod, acoustic wave detector;

[0048] Step2: Use a sound wave detector to detect: Use a sound wave detector to accurately locate the location, quantity and scope of the rupture area. The measured sound velocity is 4000m / s-6000m / s as a complete rock mass area, and the sound velocity is lower than 4000m / s. Rock mass area;

[0049] Step3: Drilling: Use a drilling machine to drill holes of corresponding size according to the divided area;

[0050] Step4: Configure water: cement: sand: expansion agent according to a certain mix ratio, and expand the cement mortar with a ratio of a: b: c: d, and prepare a certain proportion of ordinary cement slurry;

[0051] Step5: Assemble the anchor rod: Tighten one...

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Abstract

The invention discloses a device and method for strengthening different fracture zones of deep rock mass with the expansion agent head-enlarging effect. The device comprises the deep rock mass, the deep rock mass is internally provided with different fracture rock mass zones and intact rock mass zones; anchor rods are anchored in the fracture rock mass zones and the intact rock mass zones, expansion cement slurry with different contents of expansion agents is poured in the fractured rock mass zones at different depths or layers at which the anchor rods are located to form anchoring bodies at different depths, and then the anchor rods are anchored in the deep rock mass; and cushions are arranged on the anchor rods and located on the edges of the fractured rock mass zones. The device and method have the advantages of greatly shortening the length of anchoring segments, reducing the diameter of drilling holes, greatly increasing the anti-pulling force, saving the construction cost and theconstruction period and the like. The device for strengthening the different fracture zones of the deep rock mass with the expansion agent head-enlarging effect is mainly used in bridge and tunnel engineering, ports and piers, slope engineering, mine construction, national defense engineering and the like, and has a wide range of engineering practical significance and application prospects.

Description

technical field [0001] The present invention mainly relates to a new type of body-expanding anchoring technology, a method for reinforcing different rupture areas of deep rock mass by utilizing the head-expanding effect of expansion agent, which mainly belongs to the support field of deep high-in-situ stress surrounding rock, and is mainly applicable to bridge and tunnel projects, ports Wharf, slope engineering, mine construction, national defense engineering and other projects. Background technique [0002] With the rapid development of my country's economy, anchoring technology has been widely used in high-rise buildings, rail transit, bridge and tunnel engineering, urban underground transportation hubs, ports, high reservoir dams, slope engineering, mine construction, national defense engineering and other fields. The engineering community is facing large-scale, technically difficult and risky geotechnical engineering stability issues such as tunnels, underground caverns,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04E02D17/20
CPCE02D17/04E02D17/20
Inventor 刘杰兰俊高素芳周克虎张罗送高进罗越文孙涛黎照周文俊莫承林姜锋韩绍康李骁霖武杰宾蒋旭
Owner CHINA THREE GORGES UNIV
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