Combined special-shape steel plate stiffened-core cement foundation pit support structure and construction method thereof

Abstract

The invention relates to a combined special-shape steel plate stiffened-core cement foundation pit support structure and a construction method thereof. A combined special-shape steel plate comprises three vertical steel plates, two combined connecting pieces and steel strands. The three vertical steel plates form a Y shape. First steel strand penetration holes and slots are formed in the combined connecting pieces. Both the upper end and the lower end of each vertical steel plate are connected with the combined connecting pieces respectively via the slots. The steel strands penetrate the first steel strand penetration holes and enable the upper and lower combined connecting pieces to tightly clamp the vertical steel plates. The combined special-shape steel plate is embedded into a cement mixing pipe after being combined completely. After the foundation pit construction is over, limit to the vertical steel plates from the combined connecting pieces and the steel strands is released, and finally the vertical steel plates and the steel strands are pulled out respectively. The combined special-shape steel plate stiffened-core cement foundation pit support structure has the advantages of good bending resistance, high bearing capability, high construction speed, convenience in structure combination, recyclable vertical steel plates and steel strands and outstanding technical and economic benefits.

Description

technical field [0001] The invention relates to a combined special-shaped steel plate strength core cement soil foundation pit enclosure structure and a construction method, which belong to the field of foundation pit engineering and are suitable for foundation pit support treatment in construction engineering, road engineering and defense engineering. Background technique [0002] The foundation pit support is to ensure the safety of the surrounding environment of the foundation pit and the construction of the underground structure, and the reinforcement, support and protection measures adopted for the surrounding environment and the side wall of the foundation pit. In the current civil engineering construction process, the scale and depth of foundation pit engineering are also increasing, and the safety and practicability of foundation pit support are challenged to some extent. Therefore, when designing a foundation pit, it is necessary to consider not only the impact of a...

AI Technical Summary

Problems solved by technology

[0009] In summary, although the existing support structures have achieved good reinforcement effects under suitable engineering conditions, there are still some areas that need to be improved, such as the poor bending resistance of the gravity support structure, and the cantilever enclosure. The bending deformation of the protection structure is large, the internal support enclosure structure is difficult to reuse, the cost of prestressed anchor cables and row pile support is too high, and the bending and torsion resistance of concrete core cement-soil composite piles are difficult to guarantee, etc.

Images