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Narrow area ultra-deep channel inclined well back excavation construction method

A construction method and technology for inclined shafts, applied in tunnels, shaft linings, tunnel linings, etc., can solve the problems of deep passage, difficult construction, and narrow construction area, and achieve the effect of small road area, shortened construction period, and less personnel input.

Inactive Publication Date: 2017-08-18
THE THIRD CONSTR OF CHINA CONSTR EIGHTH ENG BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the narrow construction area and deep passage, this kind of auxiliary project is extremely difficult to construct
And because most of the construction sites are located in downtown areas with relatively dense buildings, it also brings great challenges to construction safety.

Method used

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  • Narrow area ultra-deep channel inclined well back excavation construction method
  • Narrow area ultra-deep channel inclined well back excavation construction method
  • Narrow area ultra-deep channel inclined well back excavation construction method

Examples

Experimental program
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Effect test

Embodiment

[0039] Embodiment: A back-excavation construction method for an ultra-deep channel inclined shaft in a narrow area, comprising the following steps:

[0040] (1) Construction stakeout: According to the construction drawings, excavate along the outline of the main tunnel arch;

[0041] (2) Advance support: Drill the installed steel soffit in the stratum outside the contour excavated in step (1) and drive into the conduit. Seam steel pipe, one end of the conduit is closed and made into a pointed shape, inserted into the drilled conduit hole, and a reinforcing hoop is welded to the tail of the other end to prevent deformation of the tail end of the conduit during construction; in the middle of the conduit Drill quincunx-shaped small holes with a diameter of 6mm and a spacing of 100mm as grouting holes, and pressurize the grout for cementation into the surrounding rock stratum through the conduit, forming a 0.4-1m thick reinforcement ring outside the contour of the tunnel arch. , ...

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Abstract

The invention discloses a narrow area ultra-deep channel inclined well back excavation construction method. The narrow area ultra-deep channel inclined well back excavation construction method comprises the following steps of (1), construction lofting, (2), advance support, (3) freeing surface excavation, (4), measurement lofting, (5), static blasting, (6), rock breaking and residue soil outward transporting and (7), primary support. According to the back excavation construction method, excavation is conducted from bottom to top, the occupied ground road area is small, normal traffic of a road can be guaranteed, and additional pressure is not brought to transportation; residue soil in the inclined well construction process can be transported out directly with residue soil in a main channel, so that the secondary carrying process is omitted, used equipment is simple, personnel input is less, cross operation can be conducted, the construction period is shortened, and the cost is reduced by a large margin; and after rock breaking is conducted through static blasting, manual work and a machine are matched to conduct clear-up and excavation, the residue soil is directly loaded into a vehicle through an excavator after blasting and directly transported to a residue field through a main tunnel, disturbance of inclined well excavation to tunnel bedrock on the two sides and an upper rock stratum is reduced, and construction safety is guaranteed.

Description

technical field [0001] The invention belongs to the field of ancillary engineering construction of underground buildings, and in particular relates to a reverse excavation construction method for an inclined shaft of an ultra-deep passage in a narrow area. Background technique [0002] The utilization of urban underground space has become an important content and development trend of modern city construction in China and even the world. The utilization of urban underground space includes underground comprehensive pipeline corridors, urban underground transportation, and urban underground commerce. my country's urban construction is in the stage of rapid development. With the rapid development of modern cities, the urban population is overloaded and the traffic is congested. An indispensable auxiliary project for road tunnels. [0003] Due to the narrow construction area and deep passage, this kind of auxiliary project is extremely difficult to construct. And because most of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/02E21D9/00E21D11/10
CPCE21D9/02E21D9/00E21D9/006E21D11/10
Inventor 全有维丁涯程建军向明沈兴东赵腾飞邓军张晓鹏
Owner THE THIRD CONSTR OF CHINA CONSTR EIGHTH ENG BUREAU
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