Variable cross-section test device and method for simulating slurry shield slurry permeation film formation
A test device, mud-water shield technology, applied in the direction of permeability/surface area analysis, measurement device, suspension and porous material analysis, etc., can solve the three-dimensional diffusion type seepage deviation, without considering the quality of mud film formation and seepage field changes The impact of excavation face stability and other issues
Active Publication Date: 2021-07-30
SHANDONG UNIV +1
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Problems solved by technology
The inventors found that the existing mud permeation and film formation test device is an equal-section permeation column device, which is a one-dimensional directional permeation test, and does not take into account the quality of mu
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The invention discloses a variable cross-section test device and method for simulating slurry shield slurry permeation film formation. The variable cross-section test device comprises a test cylinder, which comprises an upper cylinder and a lower cylinder which are connected, wherein the diameter of the lower cylinder is greater than that of the upper cylinder, a muddy water bin is arranged on the lower portion in the upper cylinder, a stratum filling bin and a pebble filtering layer are sequentially arranged in the lower cylinder from top to bottom, manometers are arranged on the lower portion of the upper cylinder and the side wall of the upper portion of the lower cylinder, the side wall of the bottom of the lower cylinder is connected with a measuring cylinder, a metering scale is arranged at the bottom of the measuring cylinder in a matched mode, and the manometers and the metering scale are both connected with an upper computer.
Description
technical field [0001] The invention belongs to the technical field of mud-water shield construction, and in particular relates to a variable-section test device and method for simulating mud penetration and film formation in a mud-water shield. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Slurry shield is widely used in the construction of cross-river tunnels because of its good support ability and low disturbance to high permeability strata. The key to mud-water shield construction is to form a dense mud film in front of the excavation face. The mud pressure acts on the soil skeleton through the mud film to balance the water and soil pressure in the stratum, thereby maintaining the stability of the excavation face. The film formation mechanism and the influencing factors of the mud film quality are the core factors to maintain the stability o...
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CPCG01N15/0826
Inventor 丁万涛王中荣黄兴行陈瑞王承震李东升于文端王志成陈永志屈克军郭晓炜
Owner SHANDONG UNIV