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Simplified design calculation method for tunnel and underground space different cavity shape surrounding rock pressure

A technology of surrounding rock pressure and underground space, applied in calculation, computer-aided design, special data processing applications, etc., can solve the problems of not the most simplified calculation and cumbersome parameter selection

Pending Publication Date: 2019-07-23
中国市政工程西北设计研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, using the "universal method" to calculate the surrounding rock pressure values ​​of underground spaces with different cross-section types such as rectangles, circular tanks, squares, and through tunnels, the selection of parameters is cumbersome. Which parameters are applicable and which parameters Not applicable, need to analyze and judge according to the situation and experience
In addition, this "universal method" is not the most simplified calculation for different hole shapes

Method used

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  • Simplified design calculation method for tunnel and underground space different cavity shape surrounding rock pressure
  • Simplified design calculation method for tunnel and underground space different cavity shape surrounding rock pressure
  • Simplified design calculation method for tunnel and underground space different cavity shape surrounding rock pressure

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Embodiment Construction

[0045] figure 1 Shows the known conditions of the tunnel and underground space: H is the buried depth, α is the half-width of the hair hole, α 1 is the half-width of the stratum sliding surface, y is the height of the hole, L is the length of the subsidence soil column, that is, the length from the hole mouth to the face of the tunnel, Z is the thickness of the soil column unit,

[0046] The application method of the present invention is as figure 2 Shown: According to figure 1 Given the known conditions provided, the following parameters are obtained: subsidence soil column aspect ratio n, depth influence coefficient n', n'=2n / (1+2n);

[0047] Then judge the shape of the cavern according to the aspect ratio n of the subsidence soil column and the influence coefficient n′ of the depth;

[0048] And according to the geological conditions of the tunnel and underground space and the classification of the surrounding rock, the physical parameters are determined: cohesion c o...

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Abstract

A simplified design calculation method for tunnel and underground space different cavity shape surrounding rock pressure comprises the following steps that according to known conditions provided by the design of the tunnel and the underground space, the length-width ratio n and the depth influence coefficient value n' of a sunken soil column are obtained, wherein n '= 2n / (1 + 2n); n and n' judge the shape of the cavern; according to the geological conditions and the grades of the surrounding rocks, physical parameters are determined: a cavity shape surrounding rock cohesive force c, an internal friction angle weight gamma, a Poisson's ratio mu and an initial side pressure coefficient xi which are equal to / (1-mu); and the surrounding rock pressure values of the tunnel and the underground space by applying a simplified formula corresponding to the shape of the corresponding cavity are calcualted. Surrounding rock pressure values calculated through the method are well matched with measured values, and the engineering actual situation is met. A beneficial reference value is provided for application of the load structure method to guidance of engineering practice.

Description

technical field [0001] The invention belongs to the technical field of calculation and design of surrounding rock pressure in tunnels and underground spaces, in particular to a simplified design and calculation method for surrounding rock pressures of different cave shapes in tunnels and underground spaces. Background technique [0002] Application number: 201610824651.1 Invention application name "Universal Design and Calculation Method for Deep and Shallow Buried Vertical Surrounding Rock Pressure in Tunnels and Underground Spaces" (hereinafter referred to as "General Method"), which provides a general design and calculation method to solve the calculation of surrounding rock pressure. This "universal method" is a three-dimensional limit surrounding rock pressure calculation theory based on objective multi-factors, taking into account the buried depth H, the half-hole width α, and the half-width of the stratum sliding surface α 1 , hole height y, subsidence soil column len...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F2119/06
Inventor 童景盛陈双庆张伟强韩秀丽
Owner 中国市政工程西北设计研究院有限公司
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