A test simulation method for the bearing capacity of vertical support columns under the construction environment of reverse construction

Abstract

A method for testing and simulating the bearing capacity of a vertical support column under an upside-down construction environment, comprising the following steps: S1, proportionally reducing the box body, steel pipe test pieces, bedrock, actual piles, soil layers, shaped pipes, medium materials, and applying pressure Component size; S2, making concrete-filled steel pipe columns, actual piles, bedrock, and boxes; S3, placing shaped tubes coaxially outside the steel tube test piece, and filling the medium material between the shaped tube and the steel tube test piece, and the difference is different outside the shaped tube Fill the corresponding soil layer at a height. During the filling process, the shaping pipe is pulled out layer by layer, and detection components are installed at different heights of the soil layer; S4. Install the pressure applying component and apply pressure vertically downward to the top of the steel pipe test piece; S5. Draw simultaneously N‑Delta curve. The invention integrates geotechnical engineering and construction engineering, can realize the simulation of the construction environment and construction conditions of the upside-down method, and provides a scientific and convenient bearing capacity test method for the upside-down vertical load-bearing components.

Description

Technical field [0001] The present invention relates to the technical field of building construction tests, and more particularly to a trial simulation method of vertical support column load in a counter-construction environment. Background technique [0002] With the leap-forward development of China's urban construction, large-scale high-rise building foundations and basements, large underground shopping malls, underground parking lots, underground stations, underground transportation hubs, and underground substations are facing deep base pit construction. Puzzle. Due to the engineering geological and hydrogeological conditions of the construction site tend to be complex, the foundation of the foundation, the construction of the large area and large depth construction, in the case of ensuring the progress of time, resource conservation, environmental protection, etc., the traditional The construction method of deep foundation pit is difficult to adapt to the increasingly comple...

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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