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Large-gradient small-section underground cavity excavating construction method

A technology for underground caverns and construction methods, which is applied in earth-moving drilling, mining equipment, tunnels, etc., can solve problems such as high maintenance and operation requirements, worsening operating environment, and smoke exhausting of fuel equipment, so as to reduce construction interference and slag removal efficiency. High and cost saving effect

Inactive Publication Date: 2017-11-24
CHINA RAILWAY SIXTH GRP TIANJIN RAILWAY CONSTR +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages: one-time investment cost is large, transportation needs to be reversed twice, high maintenance operation requirements, high safety risks
Disadvantages: limited by the construction conditions such as the length of the inclined shaft, the size of the section, and the size of the longitudinal slope, the exhaust of fuel oil equipment will deteriorate the working environment

Method used

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  • Large-gradient small-section underground cavity excavating construction method
  • Large-gradient small-section underground cavity excavating construction method

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Embodiment Construction

[0021] The construction method for excavating underground caverns with large slopes and small sections provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] The length of the inclined shaft in the underground cavern in the second phase of a water supply project is 708.983m, and the comprehensive slope is 36.875%. The rock category is mainly extremely soft rock, which belongs to underground caverns with large slopes and small sections. The construction is difficult and the safety risk is high. How to reasonably select and arrange the transportation system and how to scientifically organize the close construction of each process is the key to ensure the smooth construction of the project.

[0023] According to the requirements of construction conditions, engineering quantity and construction period, after the demonstration and optimization of the construction technical plan, it was dec...

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Abstract

The invention discloses a large-gradient small-section underground cavity excavating construction method. By combination of inclined shaft track transport and main tunnel trackless transport, people-oriented safety construction is realized, construction safety is guaranteed, construction interferences are reduced, construction cost is saved, and safety accidents in a construction process are avoided. In construction, the construction progress requirement is met, slag discharging efficiency is improved, and inclined shaft transport is no longer an engineering construction progress restriction factor. According to engineering construction practice, the construction method is effective and has advantages of technical reliability, high mechanization degree, convenience in operation, safety, reliability, high slag discharging efficiency, low operating cost and high economic benefits, thereby having a certain reference significance and popularization value in similar engineering construction.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction methods, in particular to an excavation construction method for underground caverns with large slopes and small sections. Background technique [0002] According to the "Construction Specifications for Underground Excavation of Hydraulic Structures", the scale of underground caverns is divided according to the excavation size and section size of underground caverns. Among them, tunnels with an area of ​​10-30㎡ or a span of 3.0-5.5m are small-section tunnels ;According to the inclination angle, it can be divided into three types: flat hole, inclined shaft and vertical shaft, among which the inclination angle is 6°-75° for the inclined shaft. In the case of inclined shafts with large slopes and small cross-sections, there are certain restrictions on the selection of construction methods, and the construction safety risk level is correspondingly increased. Therefore, choosing scientific ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D9/12
CPCE21D9/00E21D9/12E21D9/126
Inventor 马陆民贺龙杨微微马学权高纪禄孙强王瑞王博刁帅铭郭晓军
Owner CHINA RAILWAY SIXTH GRP TIANJIN RAILWAY CONSTR
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