Vertical support column bearing capacity test simulation device in reverse construction environment

Abstract

The invention provides a vertical support column bearing capacity test simulation device in reverse construction environment. The device comprises a box body, a steel tube test piece, bedrock, an actual pile, soil layers, a pressure applying assembly, a control unit, and a test unit, wherein the bedrock whose middle part is provided with a pile hole is placed into the box body, the steel tube testpiece filled with concrete is coaxially inserted into the actual pile arranged in the pile hole, a plurality of layers of soil layers are compacted in sequence above the bedrock in the height direction of the box body, a medium material can fill the space between the inner side wall of the soil layer and the surface of the steel tube test piece, the pressure applying assembly is used for applyingpressure to the upper end of the steel tube test piece, and the control unit is in signal connection with a plurality of strain gauges and a plurality of displacement meters D arranged on the steel tube test piece and connected with the controlled end of the pressure applying assembly. According to the device, a pile is the actual pile, and a steel tube filled with the concrete is used as a column. According to the device, the influence, generated when different gaps are adopted between the pile and the column for backfill materials, on the constraint effect of the support column is researched through the test, so as to verify the rationality of the vertical support column slenderness ratio calculation formula.

Description

technical field [0001] The invention relates to the technical field of building construction tests, in particular to a test simulation device for the bearing capacity of vertical support columns under the construction environment of the reverse method. Background technique [0002] With the leap-forward development of China's urban construction, the construction of large-scale high-rise building foundations and basements, large underground shopping malls, underground parking lots, underground stations, underground transportation hubs, and underground substations are all faced with deep foundation pit construction. problem. Since the engineering geology and hydrogeological conditions of the construction site are often complex and changeable, and the foundation pit construction is often in a super large area and deep construction situation, under the condition of ensuring a series of requirements such as construction schedule, resource conservation and environmental protection...

AI Technical Summary

Problems solved by technology

Since the engineering geology and hydrogeological conditions of the construction site are often complex and changeable, and the foundation pit construction is often in a super large area and deep construction situation, under the condition of ensuring a series of requirements such as construction schedule, resource conservation and environmental protection, traditional methods The deep foundation pit construction method is difficult to adapt to the increasingly complex development conditions

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