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Construction method of hydropower station traffic tunnels

A construction method and technology of a hydropower station, which is applied in the fields of earth drilling, mine/tunnel ventilation, dust prevention, etc., can solve the problems of unconsidered construction economy, harsh construction environment, single excavation method, etc., and shorten the overall construction time , balanced construction resources and reasonable construction schedule

Inactive Publication Date: 2020-06-05
CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The ventilation and dust reduction of the construction work surface is not considered, which makes the construction environment relatively harsh, which also reduces the efficiency of tunnel construction; only the excavation method of support is adopted, and the excavation method is single, and the construction economy is not considered

Method used

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Embodiment

[0038] A construction method for a traffic tunnel group of a hydropower station, comprising:

[0039] Step 1: Formulate ventilation, smoke exhaust and dust removal schemes during tunnel excavation;

[0040] Step 1.1: Install the press-in ventilation device, so that the dust after blasting is diluted and discharged through the press-in ventilation. The air outlet of the ventilator is arranged outside the tunnel opening to ensure that the air entering the tunnel is fresh air. The ventilation pipe adopts the matching ventilation fan. The soft air duct is arranged along the top arch of the tunnel wall to exhaust smoke during tunnel construction and provide fresh air to the working face. Keep a distance of 10m;

[0041] Step 1.2: Set up a precipitation curtain close to the construction work surface to reduce the escape of smoke and dust;

[0042] Step 1.3: Use physical isolation to close the dust-generating equipment and the place where the dust is generated, so as to reduce the ...

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Abstract

The invention belongs to the technical field of infrastructure construction engineering, and discloses a construction method of hydropower station traffic tunnels. The method comprises the following steps of step 1, formulating a ventilation, smoke exhaust and dust removal scheme during tunnel excavation; step 2, formulating a tunnel drilling and blasting scheme, adopting a double-wedge-shaped cutting and full-section excavation construction method for excavation construction of the III-level surrounding rock cave section, and excavating the IV-level and V-level surrounding rock deep-buried cave sections in an anchor rod supporting and step method mode; and step 3, after the tunnel is excavated, firstly lining an inverted arch, then filling the inverted arch, and carrying out pavement baselayer concrete construction, and after primary support convergence, completing arch wall concrete construction through one-time lining by means of a lining formwork trolley. According to the method disclosed by the invention, the working face of each cavern can be scientifically utilized, time is strived for, construction period arrangement is reasonable, workers of all types of work can be in continuous construction, specialized construction is achieved, reasonable lap joint among all types of work is realized, invested construction resources are relatively balanced, organization work of resource supply is facilitated, and construction efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of infrastructure construction engineering, and in particular relates to a construction method for a traffic tunnel group of a hydropower station. Background technique [0002] At present, the development of the hydropower market is gradually shifting to remote areas, and the terrain conditions in the construction area are complex. Therefore, the road design in the power plant area is mainly based on tunnels, so the road system on the site is mainly based on tunnel groups, which leads to long tunnel lengths and increased However, in order to pursue greater benefits, the hydropower development unit will not extend the construction period, and often keeps the construction period within a reasonable range. Therefore, it is necessary to summarize a set of rapid construction technologies for highway tunnel groups to ensure that the construction goals can be completed normally, and even ahead of schedule. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F1/00E21F1/08E21F5/04E21F5/00E21F17/103F04D29/70C04B28/02C04B111/70
CPCC04B28/02C04B2111/00724C04B2111/70E21F1/003E21F1/006E21F1/08E21F5/00E21F5/04E21F17/103F04D29/703C04B14/06C04B24/383C04B24/045C04B24/42C04B22/142C04B18/08C04B24/223C04B22/124C04B22/08
Inventor 景通肖亮邰二东齐双全何慧慧
Owner CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD
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