Model test device simulating dynamic responses of near-sea foundation pit under action of wave loads

Abstract

The invention discloses a model test device simulating dynamic responses of a near-sea foundation pit under the action of wave loads. The device comprises a model case, a supporting steel frame, a drainage slope and a measuring system. The model case comprises a model case framework, a retaining wall, a breakwater and sensor fixing supports. The drainage slope comprises a slope framework, a slope panel, organic glass boards and damping bars, wherein the damping bars are supported between the drainage slope and a wave channel. Miniature earth pressure cells are buried in the retaining wall. The breakwater is arranged on the driving side of the foundation pit, and wave height meters are hung in front of the breakwater. The sensor fixing supports are arranged at the bottom of the model case and used for fixing pore pressure meters. By means of the model test device, responses of earth pressure and pore water pressure at the driving side and the driven side of the foundation pit under the actions of different foundation pit widths, different retaining wall burying depths, different distances from the breakwater to the retaining wall and different wave parameters can be simulated. The model test device can provide effective test data support for researches of the dynamic response problem of the near-sea foundation pit under the action of the wave loads, and provide help for theoretical analysis.

Description

technical field [0001] The invention relates to a test device for measuring earth pressure and pore water pressure in marine foundation pit engineering, in particular to a model test device for the response of active and passive side soil pressure and pore water pressure of foundation pits near the sea with changes in wave elements, which can be used for measuring The values ​​of active and passive lateral soil pressure and pore water pressure of foundation pits near the sea under different excavation widths, different excavation depths, different depths of retaining walls, and different distances between retaining walls and breakwaters. technical background [0002] With the development of coastal cities, more and more high-rise buildings, underground space development projects, cross-sea team roads, cross-sea bridges and other major projects have been put into construction, followed by the development and construction of a large number of deep and large foundation pits alon...

AI Technical Summary

Problems solved by technology

However, in the existing design of coastal engineering in China, only the loads directly transmitted by waves to the seabed and buildings (structures) are considered, and the influence of pore water pressure in the seabed under the action of waves on the engineering force and deformation is not considered.

This makes the design of the foundation pit near the sea more conservative than the actual situation, which makes the project construction cost high, and may also cause safety hazards in the project because the effect of pore pressure accumulation is ignored

Images