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Filling method of deformable karst cave

A filling method and technology of karst caves, which are applied in the direction of filling, earth square drilling, soil protection, etc., can solve the problems of long grouting time, restricting the passability of block stones, filling and reinforcement, etc., so as to improve the construction speed and reduce the The cost of engineering construction and the effect of ensuring the stability of surrounding rock

Active Publication Date: 2021-08-06
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of my country's construction of a powerful country in transportation, the scale of tunnel construction involved in highway, railway and urban rail transit projects continues to expand, and tunnel engineering construction inevitably passes through high-risk karst areas; karst caves pose a major hidden danger to the safety of tunnel engineering construction , it needs to be filled and reinforced in the early stage; if the karst cave cannot be effectively filled and reinforced, it is very easy to cause the surrounding rock or bottom bearing layer to collapse during the tunnel excavation construction process, resulting in the burial of excavation machines or personnel, endangering the life safety of the builders
However, the traditional method of filling caves during tunnel construction in karst areas is to use the grouting process to fill the caves with cement slurry or mortar to reinforce the caves. This method takes a long time for grouting and consumes a lot of materials. If it encounters areas with abundant groundwater, it is not easy Form a filling reinforcement area; if the stones can be put into the karst cave now, and then the grout is poured in, the complementary reinforcement of different coarse and small stones and the grout can be well realized, and the filling and reinforcement effect of the karst cave can be improved more effectively
However, the size of the diameter of the grouting hole limits the passability of the rocks. Only small rocks can be used to fill the cave through the grouting hole, and the filling effect is not ideal.

Method used

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  • Filling method of deformable karst cave
  • Filling method of deformable karst cave
  • Filling method of deformable karst cave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: A deformable cave filling method

[0037] Such as Figure 1-Figure 7 As shown, the steps are as follows:

[0038] (1) Insert the grouting pipe 8 into the elastic silicone tube 9, and then penetrate into the deformable support 6 as a whole;

[0039] (2) Lower the completed overall pipeline into the karst cave 2 along the drilling conduit 3;

[0040] (3) The console 5 controls the ring locking device 11 through the pipeline 7 to realize that the ring lock is tightly embedded 13 to tightly seal the elastic silicone tube 9 so that the bottom of the elastic silicone tube 9 is sealed without leakage, and then the elastic silicone tube 9 Put down 50cm along the grouting pipe 8 with the deformable support 6;

[0041] (4) Control the amount of silicate resin material injected into the grouting pipe 8 through the grouting equipment 4, fill the elastic silicone tube 9 at the bottom of the drilled conduit 3 to realize its rapid expansion, and ensure that the deformabl...

Embodiment 2

[0050] On the basis of Example 1, the deformable support 6 is a circle with a diameter of 40cm after being opened, and its material is a steel wire; the inner diameter of the elastic silicone tube 9 is 25cm, and the thickness is 2cm; the filling material The filling steps are:

[0051] (1) Divide the silicate resin into two groups, A and B, among which, the viscosity of group A is 300cp, and the density is 1500g / cm 3 ; The viscosity of group B is 135cp, and the density is 1200g / cm 3 , Group A and Group B are mixed at a volume ratio of 1:1 and injected into the elastic silicone tube;

[0052](2) Stir the steel fiber and cement slurry evenly according to the mass ratio of 1:10 and inject them into the elastic silicone tube to complete the filling.

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Abstract

The invention relates to a method for filling a deformable karst cave, which comprises the following steps of: penetrating a grouting pipe into an elastic silicone tube, integrally penetrating into a deformable bracket, and putting into the karst cave. The elastic silicone tube is sealed, silicate resin materials are injected into the grouting tube, and then the evenly-stirred steel fiber cement paste is injected, so that the lower portion of the elastic silicone tube is of a block stone-like structure. Sealing the elastic silicone tube, shearing the elastic silicone tube and the deformable bracket, separating the formed block stone-like structure from the elastic silicone tube, and manufacturing a first block stone-like structure. The elastic silicone tube and the deformable support are lowered by 10 cm, the elastic silicone tube is sealed, and then the elastic silicone tube and the deformable support are lowered by 50 cm along the grouting tube. A block stone-like structure is manufactured again, and filling of the deformable karst cave is completed. The karst cave can be effectively stabilized, safe tunnel construction and surrounding rock stability are guaranteed, and the engineering construction speed is increased.

Description

technical field [0001] The invention relates to a method for filling deformable karst caves, which is suitable for filling and reinforcing karst caves during tunnel excavation construction in karst areas. The invention can efficiently stabilize the karst cave, ensure the safe construction of the tunnel and the stability of the surrounding rock, reduce the influence of the karst karst cave on the tunnel construction and later operation, reduce the engineering construction cost and improve the engineering construction speed, belonging to the field of underground engineering. Background technique [0002] With the development of my country's construction of a powerful country in transportation, the scale of tunnel construction involved in highway, railway and urban rail transit projects continues to expand, and tunnel engineering construction inevitably passes through high-risk karst areas; karst caves pose a major hidden danger to the safety of tunnel engineering construction I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/00E21B33/13E02D3/12
CPCE21F15/00E21F15/005E21B33/13E02D3/12E21F15/06
Inventor 朱斌韩莉徐壮王彦会李江罗小刚王健孟栋李霞武科邢志豪
Owner SHANDONG UNIV