Construction technology for reserving novel rock plug

A new type of construction technology, applied in water conservancy projects, hydroelectric power stations, hydroelectric power generation, etc., to achieve the effect of convenient construction, saving construction diversion works, and shortening drainage distance

Inactive Publication Date: 2014-12-24
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: for underground caverns with high requirements for flood control and flood control, under the condition of not affecting the construction working environment of underground caverns during the construction of import and export projects, solve the problem of safe flood control in underground caverns

Method used

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  • Construction technology for reserving novel rock plug
  • Construction technology for reserving novel rock plug

Examples

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Embodiment 1

[0015] The construction diversion standard for the inlet and outlet of the upper reservoir of the Huanggou pumped storage power station project adopts the 10-year return period rainstorm standard. The flood control standard for water delivery systems and underground powerhouses adopts the 100-year return period rainstorm standard. Considering the large difference between the diversion standard of the water inlet and outlet and the flood control standard of the underground cavern, the construction plan of the water inlet and outlet of the upper reservoir was designed with a new type of rock plug construction plan reserved. That is, a new type of rock plug with a length of 10m is reserved 15m downstream of the structural joint between the concrete at the end of the water inlet and outlet structural concrete transition and the tunnel lining concrete. And drill a 1.5m pilot hole in the middle of the rock plug, install a steel pipe with an inner diameter of 1m, δ=10mm, and make a s...

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Abstract

The invention discloses a construction technology for reserving a novel rock plug and relates to the technical field of hydraulic and hydro-power engineering, in particular to the construction technology for entrance/exit engineering of an underground cavern with the higher flood prevention requirement. According to the construction technology disclosed by the invention, the rock plug is reserved between an entrance/exit and the underground cavern; the reserved rock plug is arranged in a tunnel which is 10-15m apart from a structural joint between structural concrete of the entrance/exit and lining concrete of the tunnel; a steel pipe channel is formed in the reserved rock plug; the tip of the steel pipe channel is provided with a steel valve; after construction on the concrete of the entrance/exit and a gate is switched out, the reserved rock plug is removed by explosion. The construction technology disclosed by the invention is simple in pattern, safe and reliable to run and convenient in construction, and has very good application prospect and promotion value on the entrance/exit engineering construction of the underground cavern with the higher flood prevention requirement.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering, in particular to the construction technology of an underground cavern import and export project with high requirements for flood control and flood control. Background technique [0002] Underground caverns in water conservancy and hydropower projects often set the entrance and exit elevations in low-lying places in order to meet the needs of water intake, irrigation, power generation, and flood discharge. Some projects even have entrances and exits arranged tens of meters below the water surface. Due to the relatively low elevation layout of the entrance and exit, in the flood season every year, we have to face the safety problems of flood control and flood control of the entrance and exit projects. The problem of flood safety during the construction period of underground caverns. The diversion standards for the entrance and exit construction of water conser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B9/06
CPCY02E10/20
Inventor 赵兵唐国峰任建川崔志刚蔡光哲黄相军于长征
Owner STATE GRID CORP OF CHINA
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