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A method for modifying and strengthening rock and soil layers by injecting materials

A rock soil layer modification technology, applied in soil protection, construction, infrastructure engineering, etc., to achieve the effects of ensuring a stable foundation, shortening the construction period, and reducing labor costs

Active Publication Date: 2017-12-29
李翔宇 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a method for modifying and reinforcing the rock-soil layer by injecting material to solve the difficulty in construction caused by the instability of the rock-soil layer

Method used

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  • A method for modifying and strengthening rock and soil layers by injecting materials
  • A method for modifying and strengthening rock and soil layers by injecting materials
  • A method for modifying and strengthening rock and soil layers by injecting materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for modifying and strengthening rock and soil layers by injecting materials, comprising the following steps,

[0041] Drill the rock and soil layer from the ground 1 to form a hole with a diameter of 15 mm and a hole depth of 1 m. Insert the high-pressure gas explosion spray gun 2 into the hole, and fill the gap between the high-pressure gas explosion spray gun 2 and the hole wall with glass glue The space 3 between; Then carry out explosion fracturing to rock and soil layer with high-pressure gas explosion injection gun 2, because the high-pressure gas explosion injection gun 2 of use is high-pressure gas injection gun, the gun head of described high-pressure gas injection gun There are holes arranged in a ring around the gun head, so that when blasting the rock-soil layer, radial cracks 4 are formed in the rock-soil layer. When the high-pressure gas explosion spray gun 2 sprays high-pressure air, it will produce an instantaneous compressed air explosion effec...

Embodiment 2

[0045] On the basis of embodiment 1, the rock and soil layer is drilled from the ground 1 to form a hole with a diameter of 200mm and a hole depth of 200m. The high-pressure gas blasting spray gun 2 is inserted into the hole, and the high-pressure gas blasting is filled with cement The gap 3 between the spray gun 2 and the hole wall; and then use the high-pressure gas explosion spray gun 2 to blast and fracture the rock and soil layer, so that radial cracks 4 are formed in the rock and soil layer.

[0046] Then use the high-pressure gas spray gun 2 to spray fine sand in the radial crack 4 (if the rock and soil layer is a permafrost layer, inject industrial salt or deicing agent while spraying fine sand), the fine sand is sprayed to the blast In the formed radial fissure 4, pull back the high-pressure gas explosion spray gun 2 upwards for 20m, then use the high-pressure gas explosion injection gun 2 to blast the rock and soil layer, and spray fine sand, repeat this operation unt...

Embodiment 3

[0048] On the basis of Example 1, the rock and soil layer is drilled from the ground 1 to form a hole with a diameter of 350mm and a hole depth of 300m. The high-pressure gas blasting spray gun 2 is inserted into the hole, and the high-pressure gas is filled with viscous mud The gap 3 between the explosion spray gun 2 and the hole wall; and then the high-pressure gas explosion injection gun 2 is used to blast and fracturing the rock-soil layer, so that radial cracks 4 are formed in the rock-soil layer.

[0049] Then use the high-pressure gas spray gun 2 to spray fine sand in the radial crack 4 (if the rock and soil layer is a permafrost layer, inject industrial salt or deicing agent while spraying fine sand), the fine sand is sprayed to the blast In the formed radial fissure 4, pull back the high-pressure gas explosion spray gun 2 upwards by 50m, then use the high-pressure gas explosion injection gun 2 to blast the rock and soil layer, and spray fine sand, repeat this operation...

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Abstract

The invention relates to a method for modifying and reinforcing a rock and soil layer by injecting materials. The method includes the following steps that (1) the rock and soil layer is drilled from the ground surface, and a hole is formed; (2) a high-pressure gas spray explosion jetting gun is inserted into the hole, and the gap between the high-pressure gas spray explosion jetting gun and the wall of the hole is stuffed; (3) spray explosion fracturing is carried out on the rock and soil layer through the high-pressure gas spray explosion jetting gun, and radial cracks are formed in the part, around a head of the high-pressure gas spray explosion jetting gun, of the rock and soil layer; (4) the materials are jet into the radial cracks through the high-pressure gas spray explosion jetting gun; (5) then the high-pressure gas spray explosion jetting gun is pulled back upwards, and the step (3) and the step (4) are repeated until all the radial cracks are filled with the powder materials; and (6) coagulating agents are injected into the area where high-pressure gas spray explosion jetting is completed, and the powder materials jet into the radial cracks and the rock and soil layer are fully fused, modified and cured. The method has the beneficial effects that the rock and soil layer can be modified according to needs, and the structure of the rock and soil layer is more stable.

Description

technical field [0001] The invention relates to a reinforcement method for a rock-soil layer, in particular to a material-injection modification reinforcement method for a rock-soil layer. Background technique [0002] For the reinforcement of stable foundations in ground engineering construction, the main methods currently used in China include deep-hole deep dynamic compaction method, cushion replacement method, sand pile method, vibratory impact method, cement-soil mixing method, and high-pressure jet grouting method , preloading method, rammed cement-soil pile method, cement fly ash gravel pile method, lime pile method, lime-soil compaction pile method, soil compaction pile method, single-liquid silicification method, lye method, drainage consolidation method, Replacement and mixing method, reinforcement method, etc. These methods are difficult to adapt to the environment with strict foundation requirements such as expressway and high-speed railway, especially the constr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/12
CPCE02D3/12
Inventor 李翔宇吴福成李涛
Owner 李翔宇
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