Construction method of full-section excavation of conglomerate type V surrounding rock diversion and flood discharge scouring tunnel in the western region

A construction method and full-section technology, which is applied in sea area engineering, earthwork drilling, water conservancy engineering, etc., can solve the problems of difficult implementation, lagging progress of manual excavation, and difficult implementation of cemented and slightly dense tunnel sections, so as to achieve the goal of investing manpower The effect of less resources, fast digging progress, and low overall cost
CN106677141BActive Publication Date: 2021-05-04SINOHYDRO ENG BUREAU 15
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SINOHYDRO ENG BUREAU 15
Publication Date
2021-05-04
Patent Text Reader

Abstract

A full-section excavation construction method for diversion and flood-discharge sand tunnels in Type V conglomerate surrounding rocks in the Western Regions. According to the excavation section size in the design drawings, a laser guide is used to point, and a total station is used to stake out the tunnel face; The mechanical short-footage full-face excavation method is used to excavate the conglomerate type V surrounding rock tunnel in the Western Regions. After excavating a circular footage, the initial support is carried out. The invention adopts explosion-free full-section excavation or backhoe full-section excavation for the conglomerate type V surrounding rock in the Western Region, which has the advantages of fast excavation progress, high efficiency, strong applicability, less human resources input, high safety factor, and low comprehensive cost. .
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Description

technical field

[0001] The invention belongs to the technical field of tunnel excavation methods, and in particular relates to a construction method for full-section excavation of a conglomerate Type V surrounding rock diversion and flood discharge sand scour tunnel in the western regions. Background technique

[0002] Xinjiang Nuer Water Conservancy Project consists of main buildings such as roller compacted asphalt concrete core wall dam, left bank diversion and flood discharge and sand washing tunnel, left bank surface hole spillway, left bank power generation water diversion tunnel, and power plant building.

[0003] Among them, the diversion and flood discharge sand washing tunnel adopts the combination of the dragon head and the diversion tunnel, and is arranged on the left bank of the river bed. It is composed of the entrance channel section, the gate well section, the gradual section and the cave body section, with a total length of 848m. The main excavation of the t...

Claims

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