Three-dimensional seepage model of drainage hole of torus tunnel
A technology of torus and drainage holes, which is applied in the field of geotechnical engineering, can solve the problems of precision constraints, failure to truly reflect the characteristics of the seepage model, and insufficient calculation accuracy, so as to achieve the effect of reducing complexity and making the solution convenient, accurate and reliable
Inactive Publication Date: 2018-11-06
贵州省水利投资(集团)有限责任公司 +1
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Problems solved by technology
Using the entire inner surface of the lining concrete as the overflow boundary does not truly reflect the characteristics of the seepage model, which will inevitably lead to insufficient calculation accuracy
[0006] The other is to seek a macroscopic equivalent method, avoiding direct physical simulation of the drainage hole, as long as the "drainage effect" is simulated, such as the rod element method, the method of replacing holes with pipes and the method of replacing holes with seams, the advantages of which are almost Does not increase the amount of calculation, but is constrained by the accuracy of "equivalent" and the calculation accuracy is insufficient
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[0019] The present invention will be further described below in conjunction with embodiment, but not as any limitation to the present invention.
[0020] The three-dimensional seepage model of the drainage hole of the annular body tunnel of the present invention is generally composed of the annular rock mass of the grouting ring and the far-field annular rock mass, and the corresponding permeability coefficients are kg and kr respectively; the annular rock mass of the grouting ring and the far-field The ring rock mass remains continuous; the inner radius of the ring body of the grouting ring is r 1 (outer radius of the lining), the outer radius is r g ; The radius in the rock body of the far-field ring is r g , the outer radius is r 2 , r 2 is the far-field radius, which is equal to the height H from the groundwater level to the tunnel center, specifically as figure 1 , figure 2 , image 3 , Figure 4 . figure 1 Among them, body 1 is a torus without drainage holes ove...
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The invention discloses a three-dimensional seepage model of a drainage hole of a torus tunnel. According to the method, a rock space seepage torus is adopted, and a circular overflow boundary of thedrainage hole is equivalent to a rectangular overflow boundary, so that the complexity of the three-dimensional seepage model of the tunnel is greatly lowered; the overflow boundary of the drainage hole is subjected to accurate physical simulation, so that the solving of a three-dimensional seepage field of the tunnel with the drainage hole becomes convenient, accurate and reliable; and therefore,an outer water pressure acting on the outer edge of a concrete lining of the tunnel, a drainage amount, and a hydraulic gradient of a surrounding rock of the tunnel around the lining are obtained andbetter meet the actual conditions.
Description
technical field [0001] The invention relates to a three-dimensional seepage model of a drainage hole of a circular tunnel, belonging to the technical field of geotechnical engineering. technical background [0002] my country is a mountainous country, and the mountainous area accounts for more than two-thirds. In the construction of water conservancy and hydropower projects, highway projects, and railway projects, it is often necessary to build a large number of tunnels. The underground tunnel will interact with groundwater throughout its life cycle. The tunnel will change the environment of groundwater, and groundwater will affect the stability of the tunnel lining and even cause damage to the lining. For tunnels under high groundwater level conditions, the external water pressure acting on the tunnel lining is extremely high. When the tunnel lining is designed as a fully sealed and waterproof structure, the thickness of the lining and the configuration of steel bars are ex...
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IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/20
Inventor 徐江赵芳罗代明刘其文陈大松鲁思远陈军文明贡武兴亮冯楚桥万宁王鹏徐娇艳刘娟程明伟
Owner 贵州省水利投资(集团)有限责任公司