Three-dimensional blind tube seepage model for toric tunnel
A technology of torus and blind pipe, which is applied in the field of geotechnical engineering, can solve the problems of not truly reflecting the characteristics of the seepage model and insufficient calculation accuracy, and achieve the effect of reducing complexity and solving conveniently and accurately
Inactive Publication Date: 2018-10-12
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 to avoid direct physical simulation of the circular blind pipe, as long as the "drainage effect" is simulated, which is similar to the simulation method of the tunnel drainage hole, such as the rod element method and the pipe instead of hole method and the method of replacing holes with seams, which has the advantage of almost no increase in the amount of calculation, but is limited by the "equivalent" precision, and the calculation accuracy is insufficient
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[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, but it is not intended to limit the present invention.
[0019] see Figure 1-4 : The three-dimensional seepage model of the ring body tunnel blind pipe of the present invention is generally composed of a grouting ring ring rock mass and a far-field ring rock mass, and the corresponding permeability coefficients are kg and kr respectively; There is continuity between the rock masses of the field ring; 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 of the far-field annular rock body is r g , the outer radius is r 2 , r 2 is the far-field radius, equal to the height H from the groundwater level line to the center of the tunnel, as shown in figure 1 , figure 2 , image 3 . figure 1 Among them, body 1 is a torus without a blind pipe overflow boundary, body 2 is a torus wi...
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The invention discloses a three-dimensional blind tube seepage model for a toric tunnel. The model adopts a rock space seepage torus, and the circular overflowing boundary of the blind tube is designed to be a rectangular overflowing boundary, so the complex degree of the three-dimensional seepage model for the tunnel is greatly reduced; and a circumferential blind tube overflowing boundary is accurately physically simulated, so the three-dimensional seepage field of the tunnel provided with the circumferential blind tube can be easily and conveniently solved, thereby the external water pressure applied to the outer edge of a tunnel concrete lining, the water discharging capacity and the waterpower gradient of the lining circumference tunnel surrounding rocks accord with the actual situation.
Description
technical field [0001] The invention relates to a three-dimensional seepage model of a torus tunnel blind pipe, 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. Underground tunnels interact with groundwater throughout their life cycle. Tunnels will change the groundwater environment, and groundwater will affect the stability of tunnel linings and even cause lining damage. For the tunnel under the condition of high groundwater level, the external water pressure acting on the tunnel lining is extremely large. When the tunnel lining is designed according to the fully sealed waterproof structure, the thickness of the lining and the configuration of steel bars are extremely large, ...
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IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor徐江欧波罗代明刘其文陈军陈大松管志保武兴亮鲁思远万宁龙云宝冯楚桥候迪
Owner贵州省水利投资(集团)有限责任公司