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Construction method for multi-dike river closure of winter diversion tunnel at alpine region

A technology for alpine regions and construction methods, which is applied in marine engineering, water conservancy engineering, hydroelectric power stations, etc., can solve problems such as affecting engineering construction and the gate cannot be normally opened, and achieves the effect of short construction time and simple construction method.

Inactive Publication Date: 2019-01-04
CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD +1
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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the prior art, and to provide a construction method for diversion tunnels with multiple dikes to intercept flow in winter in alpine regions, so as to prevent the gate bottom sill, gate slot and other parts from being damaged for some reason, resulting in the gate not being able to work normally. Lower gates, problems that affect the follow-up construction

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  • Construction method for multi-dike river closure of winter diversion tunnel at alpine region

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with the accompanying drawings of the description.

[0056] Such as figure 1 Shown, the construction method of the multi-deck embankment interception of described diversion tunnel comprises the steps:

[0057] Step 1, lower the gate to form the second dike 2:

[0058] Step 1.1, set up the diversion system:

[0059] Step 1.1.1, measure and set out the line to determine the opening line of the open diversion channel, break the frozen soil layer with a hydraulic breaker, excavate the open channel from the middle to both sides according to the determined slope, and reserve the opening line at the head of the open channel 10m without excavation;

[0060] Step 1.1.2, use backhoe to cut the slope of the diversion open channel, with a slope of 1:1;

[0061] Step 1.1.3, use blasting method to remove the blocking section of diversion branch tunnel, and excavate diversion branch tunnel by wedge-shaped groove ...

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Abstract

The invention belongs to the technical field of construction of water conservancy projects, and particularly relates to a construction method for multi-dike river closure of a winter diversion tunnelat an alpine region. The water level is gradually reduced through separate arrangement of a first dike, a second dike and a third dike, and the kinetic energy of water leakage from the front and backsides of a gate is reduced; and the river closure of blockage seal is formed through pouring of underwater concrete layers. The construction method for multi-dike river closure of the winter diversiontunnel is suitable for construction of emergency conditions, such as damage of the gate and a gate slot at the alpine region, and the manufacturing of the gate according to the design requirements isnot required; a simple gate is adopted, and the influence of harsh climate on a project is eliminated; the construction method is simple and economical, and the construction time is short.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering construction, and in particular relates to a construction method for diversion tunnels with multiple dikes to intercept flow in winter in alpine regions. Background technique [0002] The interception in the hydraulic tunnel is generally provided with a gate slot, and the interception is realized by lowering the gate. However, in hydropower construction, it often happens that the bottom sill of the gate, the gate slot and other parts are damaged for some reason, causing the gate to fail to open normally, and the amount of water leakage is large, which affects the subsequent construction of the project, such as the sealing of the diversion tunnel, etc., especially In winter in alpine regions, once such problems occur, they cannot be repaired and controlled in a short time. [0003] For example, the Chinese patent application number is: CN201710270872.3, which discloses a cons...

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Application Information

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IPC IPC(8): E02B9/06E02B8/04
CPCE02B8/04E02B9/06Y02E10/20
Inventor 何无产李丹丹王飞
Owner CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD
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