Device and method for testing soil structure under the action of dynamic change of underground confined water level

Abstract

The invention discloses a device and a method for testing soil structure characteristics under action of dynamic change of underground pressure water head. The testing system comprises a calibration tank, a loading device, a confined water control system and a measurement system and also comprises a corresponding data analysis method, wherein a cohesive soil layer and a sandy soil layer are arranged in the calibration tank in a layered mode so as to simulate to form an underground water-bearing structure; the confined water control system is formed by connecting a water tank which can be freely controlled to lift and a water inlet and outlet pipe; the measurement system comprises an electrical resistivity testing module, a soil deformation testing module, a water head pressure measuring tube, a micro pore pressure gage and a micro static penetrometer, and the electrical resistivity testing module consists of testing electrodes in the circular and vertical directions. The calibration tank serves as a bearing device and is matched with other several systems, so that the change of soil structure characteristics under complex conditions of dynamic change of the underground pressure water head can be dynamically tested, the influence on the soil characteristics is further analyzed, and basic data is provided for evaluating the structural behavior and health state of underground construction under complex conditions.

Description

technical field

[0001] The invention belongs to the fields of civil engineering, traffic engineering, underground space engineering and environmental engineering, and relates to a soil structural testing device and method under the action of dynamic changes of underground confined water levels. Background technique

[0002] The development and utilization of urban underground space is an important way to solve problems such as urban space congestion, traffic jams, environmental degradation, and lack of land resources in the 21st century. In recent years, in my country's most economically developed coastal areas along the river, there has been an upsurge in the development of underground space. The underground complex formed by the combination of complex underground streets, underground cities, and underground rail transit, and large-scale underground water supply, energy systems, drainage and sewage treatment. A large number of underground municipal facilities such as undergr...

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