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Method for calculating main influence radius of surface settlement of salt rock underground storage

A technology of surface settlement and influence radius, which is applied in the direction of foundation structure test, construction, foundation structure engineering, etc., can solve problems such as uncertainty, influence radius is not theoretically strong, influence radius calculation results have large errors, etc., to achieve The effect of high calculation accuracy

Inactive Publication Date: 2018-11-30
西安华清科教产业(集团)有限公司
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Problems solved by technology

[0007] As mentioned above, the existing main influence radius calculation method is based on engineering experience, and the value of the subsidence influence angle depends on the empirical value, which has great uncertainty
If there is no relevant engineering experience for reference, the calculation result of the main influence radius will have a large error
[0008] In short, there is no theoretical, scientific and reasonable calculation method for the main influence radius of the settlement of the salt rock underground storage.

Method used

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  • Method for calculating main influence radius of surface settlement of salt rock underground storage
  • Method for calculating main influence radius of surface settlement of salt rock underground storage
  • Method for calculating main influence radius of surface settlement of salt rock underground storage

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Embodiment 1

[0066] Taking a proposed salt rock storage house as an example, the present invention is used to solve the settlement main influence radius of the salt rock storage house. The cave shape of the salt rock storage is a combined shape of the upper half ellipsoid and the lower hemisphere, with a height of 116m, a maximum span of 60m, and an initial volume of 200,000m 3 , the buried depth at the bottom is 758m; the reservoir is located in the salt rock formation, and the gravity of the salt rock is 26kN / m 3 , the internal friction angle is 30°, and the cohesion force is 1.0MPa.

[0067] According to symmetry, take half of the rock salt reservoir for simplified calculations. Take a point above the surface center of the salt rock reservoir as the center of the circle, draw an arc with R as the radius, divide the rock pillars in the arc into 10 rock pillars, and number them as follows Figure 4 shown. Table 1 shows the total shear on the arc when the center is located at 0, 50m, 10...

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Abstract

The invention discloses a method for calculating a main influence radius of surface settlement of a salt rock underground storage, which comprises the following steps: 1) simplifying the salt rock underground storage; 2) assuming that the boundary line of the subsidence area of the salt rock underground storage is an arc with O as a circle center and R as the radius; 3) calculating the total shearforce T and the total shearing resistance S acting on the arc; 4) changing the value of the arc radius R, calculating the total shear force and the total shearing resistance on the arc correspondingto the different arc radii; 5) fitting the relation expression of the difference (T-S) of the total shear force T and the total shearing resistance S on different radius arcs with the radius R, and making the T-S=0, determining the corresponding circular arc critical radius Rm value at the moment, and the circular arc corresponding to the critical radius is the settlement area boundary line in real significance; 6) determining the main influence radius of the surface settlement of the underground repository according to the boundary line of the settlement area. By the method, the main influence radius of the surface settlement of the underground repository is obtained, and the calculation accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of underground space engineering, and relates to a calculation method for the main influence radius of surface settlement of salt rock underground storage. Background technique [0002] The use of deep salt rock caves for energy storage is an energy storage method widely recognized internationally. However, during the long-term operation of the storage, due to the strong creep of salt rock, the rock mass around the cave will experience large creep deformation. As a result, the volume of the storage tank is continuously reduced and the surface subsidence is triggered. Surface subsidence is one of the main disasters in salt rock storage areas. Many cases of surface subsidence caused by excessive convergence of salt rock karst cavities have been reported internationally, such as the Tersanne gas storage in France, the Kavernen Feldes gas storage in Germany, and the U.S. West Hackberry, Mont Belvieu, Bryan Moun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00
CPCE02D33/00
Inventor 王军保宋战平刘新荣李世豪张玉伟杨欣
Owner 西安华清科教产业(集团)有限公司
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