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Microorganism curing striking-in type steel pipe soil nail and construction method thereof

A construction method and microbial technology, applied in excavation, soil protection, infrastructure engineering, etc., can solve problems such as collapse and disturbance of the excavation surface, and achieve the effects of large width, improved mechanical properties, and short construction period

Inactive Publication Date: 2019-12-03
GUANGDONG UNIV OF TECH
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Problems solved by technology

[0003] During construction in areas rich in water and highly saturated with water, although precipitation measures have been taken, some free water will still seep from the slope after excavation. If this part is not treated properly, a large number of particles may be brought out. Disturbance of the excavation surface and possible collapse

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  • Microorganism curing striking-in type steel pipe soil nail and construction method thereof
  • Microorganism curing striking-in type steel pipe soil nail and construction method thereof
  • Microorganism curing striking-in type steel pipe soil nail and construction method thereof

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Embodiment 1

[0050] Such as Figure 1 to Figure 5 As shown, this embodiment discloses a microbial solidification drive-in steel pipe soil nail, which mainly includes a steel pipe and an angle steel. The steel pipe includes a pipe head and a pipe body. The tube body adopts a cylindrical hollow tube structure design. The pipe head adopts a conical structure design, and the pipe head is installed on the pipe body, and is fixedly and sealedly connected with the pipe body. The pipe body and pipe head are also provided with grout holes for grouting and drainage. The slurry outlet holes run through the wall of the steel pipe and are distributed on the pipe body and the pipe head at intervals. The angle steel is arranged on one side of the slurry outlet, one end of which is fixed on the outer wall of the pipe body, and the other end extends obliquely upward along the tail direction of the steel pipe. When in use, insert the pipe head into the soil and drive it in from the pipe tail. When grout...

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Abstract

The invention discloses a microorganism curing striking-in type steel pipe soil nail and a construction method thereof. The steel pipe soil nail mainly comprises a steel pipe and angle iron. The steelpipe comprises a pipe head and a pipe body. The construction method mainly includes the steps that the steel pipe soil nail is manufactured, and the steel pipe soil nail is struck into mud through apneumatic down-the-hole hammer; sporosarcina pasteurii is activated and subjected to enlarge cultivation, and a microorganism bacterium solution is obtained; the obtained microorganism bacterium solution is injected into the soil nail through the steel pipe soil nail so that the microorganism bacterium solution can be spread in sandy soil; a composite nutrient solution is prepared and includes 0.5mol / L of urea and 0.5 mol / L of calcium salt; the composite nutrient solution is injected into the steel pipe soil nail and a slope face, and an anchoring body is formed; and the above steps are repeated till the strength of the soil nail reaches the design requirement, and the microorganism curing striking-in type steel pipe soil nail is obtained. By means of the microorganism curing striking-intype steel pipe soil nail and the construction method thereof, the sandy soil in the soil nail is cemented through a cementing effect of microorganisms, the mechanical property of a slope soil body isimproved, the integrity and self stability of the slope soil body are improved, and the slope can be more stable.

Description

technical field [0001] The invention relates to the technical field of foundation pit support, in particular to a microbial solidification driven-in steel pipe soil nail and a construction method thereof. Background technique [0002] The foundation pit support is to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit, and the support, reinforcement and protection measures adopted for the side wall of the foundation pit and the surrounding environment. The foundation pit support methods mainly include row pile support, pile anchor, pile support, underground diaphragm wall, steel sheet pile, cement-soil retaining wall and soil nail wall, etc. In the form of soil nailing wall support, the driven-in grouting soil nail is suitable for the weak soil layer where it is difficult to form holes. [0003] During construction in areas rich in water and highly saturated with water, although precipitation measures have been t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04E02D17/20E02D19/00E02D3/12
CPCE02D3/12E02D17/04E02D17/20E02D19/00
Inventor 肖雪莉梁仕华范楚灿卢晓燕钟宙
Owner GUANGDONG UNIV OF TECH
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