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Construction method of edge top arch and bottom arch of concrete pouring tunnel

A construction method, concrete technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc.

Active Publication Date: 2013-02-20
CHINA RAILWAY 19TH BUREAU GRP SECOND ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a construction method for concrete pouring tunnel side arches and bottom arches. The tunnel side arches poured according to this method are not prone to defects such as concrete bubbles, pockmarks, and honeycombs, and the formwork can be moved. Can greatly improve construction efficiency and reduce construction costs

Method used

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Embodiment Construction

[0062] For tunnels with circular sections that require concrete lining construction, the pouring sequence of the bottom arch within the range of 120° below the center of the circular cavern is firstly constructed, and then the side arches are constructed; , the side and roof arch adopts the construction process of integral mobile steel pipe scaffolding equipped with steel formwork; the length of the mobile scaffold is 12m, and two sections of flexible connection are used, and the entire turning section is replaced by a smooth transition of several broken line sections;

[0063] First, the construction method of pouring the bottom arch of the tunnel:

[0064] a. Rock surface cleaning, foundation acceptance:

[0065] Remove the sundries, soil, loose blocks and concrete spraying layer within the concrete pouring range, and rinse them with high-pressure water; before the bottom arch reinforcement is installed, a number of Φ25mm inserts are installed, and the row spacing between in...

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Abstract

The invention provides a construction method of an edge top arch and a bottom arch of a concrete pouring tunnel and relates to a construction method of the concrete pouring tunnel. The construction method is invented for mainly solving the problems of the existing concrete pouring tunnel that the construction cost is high and the like. With regard to the tunnel needing to be constructed, the bottom arch is firstly constructed and the pouring of the edge top arch is secondly constructed. The bottom arch is plastered by overturning a die; and the edge top arch adopts an integrally movable type steel pipe scaffold to be configured with a steel template to carry out a process of construction. A construction method of pouring the bottom arch of the tunnel comprises the following steps of: cleaning a rock surface and checking a foundation; measuring and setting out; mounting a steel bar; mounting the template; pre-burying a slurry filling pipe and mounting water-sealing and grounding flat irons; mounting a drain plug template; cleaning a cabin and checking; pouring concrete; and overturning the die and plastering; and maintaining. A construction method of pouring the edge top arch of the tunnel comprises the following steps of: cleaning the foundation, processing a construction seam and flushing; erecting an integrally movable bearing frame, measuring, setting out and mounting a steel arch frame; splicing the template; mounting the steel bar and a pre-buried piece; cleaning the cabin and checking; pouring the concrete; removing the template, the arch frame and the like; and maintaining. The construction method has the advantage of low construction cost.

Description

Technical field: [0001] The invention relates to a construction method for pouring concrete into tunnel side vaults and bottom arches. Background technique: [0002] At present, the construction technology of the concrete pouring tunnel bottom arch is to directly reinforce the formwork for the structural molding. After the concrete pouring is completed, for the bottom arch with a circular cross-section, defects such as concrete bubbles, pockmarks, and honeycombs are prone to appear, which is difficult to deal with and consumes a lot of time. Long time and high cost. When pouring concrete for the side vault, it is necessary to set up steel pipe scaffolding and other supporting systems separately, and use scattered small steel formwork and wooden formwork to assemble and form. The formwork cannot be moved. frame, erect formwork, and pour concrete in the next warehouse, but the steel mold trolley customized by the manufacturer cannot be reused, and the cost is high. Due to the...

Claims

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Application Information

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IPC IPC(8): E21D11/10
Inventor 魏景云张玉曹树强曲华张洪杰王孝平
Owner CHINA RAILWAY 19TH BUREAU GRP SECOND ENG CO LTD
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