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Method of calculating hydraulic pressure of high-pressure karst tunnel lining

A calculation method, high water pressure technology, applied in the field of tunnel hydraulics

Inactive Publication Date: 2017-10-03
中国水利水电第七工程局成都水电建设工程有限公司
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Problems solved by technology

[0008] The purpose of the present invention is to provide a high water pressure karst tunnel lining water pressure calculation method for most of the current tunnels that have water leakage problems, and many environmental problems caused by tunnel drainage in the tunnel site area are also very serious. method, can more accurately calculate the water pressure of the tunnel lining, so as to guide the tunnel survey, design and construction process, and reduce the risk of tunnel leakage

Method used

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  • Method of calculating hydraulic pressure of high-pressure karst tunnel lining
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  • Method of calculating hydraulic pressure of high-pressure karst tunnel lining

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Embodiment 1

[0115]In actual engineering, groundwater is discharged intensively through drainage systems such as blind pipes between primary support and secondary lining. Considering the efficiency of the drainage system, this part of groundwater is evenly distributed over the entire cross-section and considered as "reduced permeability coefficient".

[0116] Drainage tunnel, the seepage flow network of groundwater is as follows: figure 2 shown.

[0117] In actual engineering, the surrounding rock is a layered structure composed of layers of strata with different water permeability irregularly alternating. The permeability in the same stratum is almost the same, but there are obvious differences in permeability between strata and strata. In the past In the calculation, the researchers did not consider the surrounding rock as a homogeneous continuous medium, so the establishment of the following model will be based on the positional relationship between the tunnel section and strata with d...

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Abstract

The invention relates to the technical field of tunnel hydraulics, in particular to a method of calculating hydraulic pressure of a high-pressure karst tunnel lining; the method comprises: A, determining geological conditions of an excavation section of a tunnel, wherein the geological conditions include one of the tunnel excavation section being in a homogeneous formation, and the tunnel excavation section longitudinally crossing a formation; B, determining the outer diameter of each formation to the center of the tunnel, and corresponding head and osmotic coefficient of each formation; determining outer diameter of a grouting reinforcement ring, outer diameter of a primary support, outer diameter of a secondary lining, and inner diameter of the secondary lining, as well as corresponding head and osmotic coefficient; C, transforming Laplace's equation; D, calculating water inrush of the tunnel per linear meter, back head of the secondary lining, and back head of the primary support, and calculating back pore hydraulic water of the secondary lining and back pore hydraulic pressure of the primary support. The invention is intended to provide the method of calculating hydraulic pressure of a high-pressure karst tunnel lining in order to decrease the leakage risk of a tunnel.

Description

technical field [0001] The invention relates to the technical field of tunnel hydraulics, in particular to a method for calculating the water pressure of the lining of a high water pressure karst tunnel. Background technique [0002] With the rapid development of my country's economic construction, the demand for infrastructure construction, especially the construction of transportation facilities, has become more and more urgent. my country has a vast territory, and road and railway-based land transportation is the mainstream mode of transportation. In 2008, the National Railway Administration revised the "Medium and Long-Term Railway Network Planning" and estimated that the operating mileage of national railways will reach 120,000 kilometers in 2020. Above, and in 2016, the National Development and Reform Commission of China announced the latest "Medium and Long-term Railway Network Planning", indicating that by the end of 2015, the operating mileage of my country's railway...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/06
Inventor 任跃勤杨军谢强祝全兵胡海明何其芳瞿加俊聂华吴宗林杨春灿
Owner 中国水利水电第七工程局成都水电建设工程有限公司
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