Model test system for groundwater seepage in foundation pit engineering
摘要
The model test system designed is in accordance with the conditions of foundation pit engineering, which can simulate the groundwater seepage. It is composed of a soil box, a drainage box, a feed-water tank, an upper water tank, a lower water tank and a pressure measuring device. It can get the constant water head inside and outside the foundation pit by changing the water level in the feed-water tank and the drainage box, and thus forming stable seepage. The model test system is used to complete the tests on groundwater seepage of foundation pit with unclosed curtain of cutting-off drains and the groundwater seepage of completely penetrating well in stratified aquifers. The seepage shape gained is consistent with the actual situation, and it is used to study the characteristics and laws of groundwater seepage fields. The test results can guide the actual engineering design, and can be used to modify the calculation of water inflow, the water level drawdown outside the foundation pit and the settlement caused by precipitation in foundation pit specifications.