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Soil supporting device with telescopic grouting filling type shield segments and construction method

A shield segment and filling technology, which is applied in earth-moving drilling, vertical well equipment, wellbore lining, etc., can solve the problems of reducing the cement strength of segment walls, affecting the impermeability of side walls, and existing safety, etc., and achieves a wide range of applications. Market and development value, solution to delays, effect of job security

Pending Publication Date: 2020-06-19
NANCHANG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

Due to the hysteresis of the hardening of cement mortar, it may cause spalling of the soil in the space. The spalled soil is mixed with the unhardened mortar. On the one hand, the loose soil mixed in the mortar will seriously affect the anti-seepage ability of the side wall. On the other hand, it will Reduce the strength of the segment wall cement after hardening, and there are potential safety hazards

Method used

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  • Soil supporting device with telescopic grouting filling type shield segments and construction method
  • Soil supporting device with telescopic grouting filling type shield segments and construction method
  • Soil supporting device with telescopic grouting filling type shield segments and construction method

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Embodiment Construction

[0027] Below the present invention is further described:

[0028] see Figure 1-4 ,

[0029] The invention discloses a shield segment soil supporting device with telescopic grouting and filling, which comprises a soil supporting device body 1, a grouting pipe 2 and a grouting pipe 3, and the soil supporting device body 1 includes a telescopic bag 4 and A fixed base 5, the flexible bag 4 is a square structure with a hollow bottom opening surrounded by a top cover 7 and a telescopic side wall 6; The connection port 8 connected with the grouting pipe 2 and the grouting pipe 3; the bottom of the telescopic bag 4 is fixed on the upper surface rear end of the fixed base 5, and the inner cavity of the telescopic bag 4 is connected with the The connection port 8 is connected, and after the mortar is injected into the telescoping capsule 4, the telescoping capsule 4 is jacked up to be in close contact with the loose soil, and a certain compressive stress is applied to effectively pre...

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Abstract

The invention relates to the field of subway tunnel construction, in particular to a soil supporting device with telescopic grouting filling type shield segments and a construction method. The soil supporting device comprises a soil supporting device body, a grouting pipe and a mortar supplementing pipe. The soil supporting device body comprises a telescopic bag and a fixed base. The telescopic bag is of a hollow bottom-open square structure defined by a top cover and a telescopic side wall. The fixed base is of a square structure. The front end face of the fixed base is provided with a plurality of connecting ports for being connected with the grouting pipe and the mortar supplementing pipe. The bottom of the telescopic bag is fixed to the rear end of the upper surface of the fixed base.An inner cavity of the telescopic bag communicates with the connecting ports. After the telescopic bag capable of doing telescopic movements is filled with mortar, the telescopic bag performs jackingto make close contact with a loose soil body and exert a certain magnitude of pressure stress, and the stripping of the soil body is effectively prevented; and the top cover has a certain waterproof effect, time is bought for the hardening of the mortar, and the retardation problem of the hardening of the mortar is effectively solved.

Description

technical field [0001] The invention relates to the field of subway tunnel construction, in particular to a shield segment soil supporting device and construction method with telescopic grouting filling type. Background technique [0002] Shield excavation is generally used in tunnel projects such as urban subways, mountain tunnels, and river-crossing tunnels. After the shield machine excavated the soil, the laying and assembling of the segment was carried out quickly, and then the synchronous grouting was carried out. Due to the hysteresis of the hardening of cement mortar, it may cause spalling of the soil in the space. The spalled soil is mixed with the unhardened mortar. On the one hand, the loose soil mixed in the mortar will seriously affect the anti-seepage ability of the side wall. On the other hand, it will Reduce the strength of the segment wall cement after hardening, and there are potential safety hazards. [0003] Based on the above considerations, the present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/08E21D11/10E21D9/06
CPCE21D11/08E21D11/10E21D9/0609
Inventor 赵抚民樊霖涛高祥
Owner NANCHANG UNIV
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