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The invention discloses a replacement type rotary jet grouting stratum reinforcing method

A technology of grouting and formation, applied in underground chambers, earth drilling, soil protection, etc., can solve the problems of poor quality reinforcement, large waste discharge, long construction period, etc., and achieve high operating efficiency and automation High-level, high-tech effects

Inactive Publication Date: 2019-05-21
王琪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the side effects caused by the existing high-pressure rotary jet grouting to strengthen the ground and repair tunnels and underground structure diseases, such as disturbance and damage to adjacent buildings (structures), poor reinforcement quality, The amount of waste generated during the construction process is large, and the construction period is long. Provide a replacement type rotary jet grouting ground reinforcement method

Method used

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  • The invention discloses a replacement type rotary jet grouting stratum reinforcing method
  • The invention discloses a replacement type rotary jet grouting stratum reinforcing method
  • The invention discloses a replacement type rotary jet grouting stratum reinforcing method

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Embodiment Construction

[0036] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0037] Such as figure 1 As shown, in order to form the jet-jet reinforced body 1 in the pre-reinforced area 16, a jet-jet drill bit 21 is first installed at the bottom of the jet-jet drill pipe 2, and the jet-jet drill 3 is used to drive the pilot hole to reach the bottom of the reinforced area.

[0038] Distributed on the rotary grouting drill bit 21 are: reinforcement slurry nozzle 22 , high-pressure air flow nozzle 23 , suction mud discharge port 25 , hydraulic control valve 26 and pressure monitoring sensor 27 .

[0039]When the jetting drill bit reaches the bottom of the pre-reinforced area 16, turn on the high-pressure generating device such as the high-pressure pump, and the curing agent slurry is delivered to the slurry nozzle 22 and the...

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Abstract

The invention discloses a replacement type rotary jet grouting stratum reinforcing method. A construction machine tool is composed of a rotary jet drilling machine, a high-pressure pump, a rotary jetdrilling rod, a rotary jet drill bit, a nozzle, a pressure sensor, a hydraulic control valve, a slurry suction opening, a waste slurry storage treatment tank, a construction parameter controller and the like. A pressure sensor is arranged behind the nozzle to monitor the pressure value of the rotary spraying area; Based on the pressure value monitored in the rotary spraying area, the size and theslurry discharging amount of a valve on a slurry discharging opening are controlled; And the sucked and discharged replacement mud is collected into a waste mud storage treatment tank for harmless treatment. The bending angle between the rotary jet grouting drill bit and the rotary jet grouting drill rod is controlled; discharging the floating waste mud; The method has the advantages that the problem of reinforcement of stratums in sensitive areas affected by environments is solved, the quality of formed large-diameter reinforcing bodies is guaranteed, the diameter of the rotary jet grouting reinforcing bodies can reach 4.2 m, disturbance to existing buildings and structures in the reinforced areas is small, and the method is the most effective green construction method for reinforcing thestratums.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a reinforcement maintenance and active protection technology for urban subway tunnels or high-speed rail and highway tunnels, excavation of foundation pits and urban construction (construction) foundations. Background technique [0002] Under the guidance of the urbanization policy, with the rapid development of urban infrastructure construction, the development of underground space is increasing. In an area where pipelines and subways, municipal traffic tunnels, bridges and building pile foundations are densely distributed, new buildings or structures need to be protected for these existing facilities. In addition, a large number of tunnels in operation have suffered from diseases or damages of different procedures, such as tunnel structure cracks, lining body exposed reinforcement, spalling, corrosion, wrong platform, cracking, water leakage and large structural defor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/12E21D11/10
Inventor 刘斐然
Owner 王琪
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