A Method for Predicting the Thickness of Tunnel Water and Mud Burst Stop Grouting Wall
A prediction method and technology of the grout-stop wall, applied in earthwork drilling, instrumentation, geometric CAD, etc., can solve problems such as insufficient or too large thickness of the grout-stop wall, so as to avoid insufficient or too large thickness setting, simple process, reliable results
Active Publication Date: 2022-06-07
HUAQIAO UNIVERSITY
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Problems solved by technology
[0003] The main technical problem to be solved by the present invention is to provide a method for predicting the thickness of the grout-stop wall for water and mud inrush, which can predict the thickness of the grout-stop wall under specific construction conditions and geological conditions, and has the advantages of simple process and reliable results. Avoid the problem of insufficient or excessive setting of the thickness of the grout wall
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[0074] A railway tunnel in Fujian Province in the construction process of sudden water inrush mud, in order to better control the water inrush mud, it is necessary to reasonably build a pulp wall, the method of the present invention to predict the thickness of the pulp wall. According to the design data of the tunnel, the width of the tunnel is 7.0 m, the height H is 8.0 m, and the burial depth is D is 130 m; according to the length L along the longitudinal length of the tunnel, the water inrush mud revealed after the tunnel drilling and blasting construction 1 It is 3.2m; the depth of the collapse pit is measured by the total station d 1 It is 4.7 m, and the underside elevation h of the collapse pit is measured by RTK 1 423.5m; the site was drilled to reveal a stable groundwater level h 2If it is 401.6m, the distance from the bottom of the ground collapse pit to the water table d 2 It is 21.9m; the water inrush soil above and below the groundwater level is taken at the drilling s...
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The invention provides a method for predicting the thickness of the water and mud inrush wall of a tunnel, including: determining the width B, height H, and buried depth D of the tunnel; measuring the length L of the water and mud inrush along the longitudinal direction of the tunnel 1 ;Determine the depth d of the ground collapse 1 and bottom elevation h 1 , the distance from the bottom of the ground collapse pit to the groundwater table d 2 , the natural gravity γ above the groundwater level and the saturated gravity γ below the groundwater level after the disturbance of water and soil inrush sat , the effective weight γ' of the soil below the groundwater level, and the undrained shear strength c of the soil with water inrush u , The distance L from the edge of the grout-stop wall close to the face of the tunnel to the edge of the vault where the water and mud burst is far away from the tunnel face 2 , the self-weight G of the vertical water-inrush mud body, the frictional resistance R between the vertical water-inrush mud body and the surrounding side walls, the horizontal earth pressure generated by the vertical water-inrush mud body at the elevation of the vault and the tunnel bottom, The resultant force E of horizontal earth pressure produced by vertical water and mud inrush a , The frictional resistance F of the horizontal water and mud inrush, the resultant horizontal earth pressure force E acting on the grout stop wall, and the thickness L of the grout stop wall 3 .
Description
Technical field [0001] The present invention relates to a tunnel construction project, specifically a method for predicting the thickness of the slurry wall of the inrush mud tunnel. Background [0002] When tunnel construction encounters bad geology such as fault fracture zones and intrusion contact zones, water inrushes may occur. Once such a disaster is encountered, a large amount of groundwater and soil bodies gush out of the tunnel in a short period of time, posing a serious threat to the safety of construction personnel and machinery and equipment. Due to the loss of rock and soil below, the surface is prone to collapse and form a collapse pit. At this time, a concrete slurry wall is usually built quickly to seal the tunnel to prevent the further development of water inrush disasters. The thickness of the slurry wall is crucial for the further development of the water inrush disaster, if the thickness is not enough, it will move under the pressure of the water and soil of t...
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IPC IPC(8): G06F30/13E21F17/103G06F119/14
CPCG06F30/13E21F17/103G06F2119/14
Inventor 常方强
Owner HUAQIAO UNIVERSITY