Method for concrete conveying and lining construction in large-slope long inclined-shaft small-section tunnel

A construction method and concrete technology, which is applied in the direction of tunnel lining, shaft lining, tunnel, etc., can solve the problems of long process time, inflexible construction equipment, loose construction organization, etc., so as to speed up the speed of dismantling and erecting, improve the use efficiency and pouring speed effect

Inactive Publication Date: 2017-10-24
CHINA RAILWAY NO 5 ENG GRP +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a concrete transportation and lining construction method for a tunnel with a large slope, long inclined shaft, and small section, so as to overcome the problems of long process ti

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  • Method for concrete conveying and lining construction in large-slope long inclined-shaft small-section tunnel
  • Method for concrete conveying and lining construction in large-slope long inclined-shaft small-section tunnel

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Embodiment Construction

[0023] Such as figure 1 , the inclined shaft penetrates into the main tunnel from the side of the tunnel, the inclination angle of the inclined shaft is 17-24°, a chute is installed on the inclined shaft, and a concrete mixing system is installed near the top of the inclined shaft, and the mixed concrete enters the inclined shaft through the chute installed on the inclined shaft The collection bin at the bottom of the well, the collection bin is larger than 2.5m³, and a delivery pump and two delivery pump elbows are installed under the collection bin to transport the concrete to the pouring surface of the upper and lower sections of the tunnel. The horizontal transportation slope in the tunnel is -0.24% to 0.24 %, it can achieve up to 1.4km downhill pumping relay transportation, and the maximum distance of a single pump relay can reach 640m. In order to ensure the smooth flow of the trackless transportation channel, a place with a relatively large section is selected as the pl...

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Abstract

The invention discloses a concrete transportation and lining construction method for a small-section tunnel with a long inclined shaft with a large slope: the inclined shaft penetrates into the main tunnel from the side of the tunnel, and the mixed concrete enters the aggregate bin at the bottom of the inclined shaft through a chute installed on the inclined shaft , and then transported to the pouring areas on both sides by the delivery pump, and each pouring area uses four sets of bottom formwork and two sets of side arch formwork for partition pouring. The invention solves the problem of rail slag transportation and concrete hole pouring transportation through the inclined shaft chute The interference of parallel operations, through the pumping relay in the front tunnel, overcomes the difficulties of trackless transportation, concrete transportation and bottom sorting equipment in the tunnel. The difficulty of large and narrow passages for bottom picking equipment is increased through the formwork configuration of 4 sets of bottom formwork and 2 sets of side and top arches combined with partitioned pouring. The working surface is optimized, the space is optimized, and the construction progress is accelerated under the premise of ensuring the construction quality and safety.

Description

technical field [0001] The invention relates to a construction method for tunnel lining, in particular to a method for transporting concrete in an inclined shaft and for pouring tunnels in different areas. Background technique [0002] When the section of the tunnel is small, the slope of the inclined shaft reaches 24°, the height difference reaches 213.5m and above, and the length of the inclined shaft reaches 575.75m, it is difficult to realize the tunnel lining while excavating the inclined shaft. , How to realize the uninterrupted transportation in the tunnel, the parallel operation of the lining in the concrete transportation tunnel, and the two-way running space of the transportation channel are difficult problems during construction. Similar tunnels are currently being built in China. In order to ensure that the tunnel lining can not be disturbed, the method of complete bottom selection of the whole tunnel and centralized pouring after the floor cushion is poured is g...

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Application Information

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IPC IPC(8): E21D11/10E21F13/04
CPCE21D11/105E21D11/102E21F13/04
Inventor 何志敏何志平刘玉府黄勇邓理游唐明秀
Owner CHINA RAILWAY NO 5 ENG GRP
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