Method of calculating hydraulic pressure of high-pressure karst tunnel lining
A calculation method, high water pressure technology, applied in the field of tunnel hydraulics
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[0115]In actual engineering, groundwater is discharged intensively through drainage systems such as blind pipes between primary support and secondary lining. Considering the efficiency of the drainage system, this part of groundwater is evenly distributed over the entire cross-section and considered as "reduced permeability coefficient".
[0116] Drainage tunnel, the seepage flow network of groundwater is as follows: figure 2 shown.
[0117] In actual engineering, the surrounding rock is a layered structure composed of layers of strata with different water permeability irregularly alternating. The permeability in the same stratum is almost the same, but there are obvious differences in permeability between strata and strata. In the past In the calculation, the researchers did not consider the surrounding rock as a homogeneous continuous medium, so the establishment of the following model will be based on the positional relationship between the tunnel section and strata with d...
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