Combined steel structure support pile and construction method

Abstract

The invention provides and discloses a combined steel structure support pile and a construction method thereof. The combined steel structure support pile comprises special-shaped hollow steel piles with right-angle edges, H-shaped steel piles and U-shaped steel piles. Two cantilevers with the end portions provided with circular balls are arranged on each of the two sides of each special-shaped hollow steel pile with the right-angle edge. Each of two wings of each H-shaped steel pile is provided with two buckles of 3 / 4 arcs. The two ends of each U-shaped steel pile are arranged to be in a circular ball shape. The special-shaped hollow steel piles with the right-angle edges are connected with the H-shaped steel piles through the circular balls on the cantilevers on the pile edges. The U-shaped steel piles are connected with the H-shaped steel piles through the circular balls at the two ends. According to the construction method, the special-shaped hollow steel piles with right-angle edges are arranged at the right-angle corners of the four edges of a foundation pit; along an outer edge line parallel to an underground structure outer wall, paying off of the H-shaped steel piles and the U-shaped steel piles is conducted, and the H-shaped steel piles and the U-shaped steel piles are pressed to sink one by one through a mechanical method; and foundation earthwork is excavated, and steel purlines or steel purlines and steel supports are erected according to the design requirement. The combined steel structure support pile and the construction method are particularly suitable for medium-small-sized basements, underground garages and comprehensive pipe racks, and operation can still be conducted in the construction environment with the narrow field.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a temporary building or part suitable for foundation pit support of small underground garages, foundation pit support of underground fire pools, bridge foundation cofferdams, flood control and interception, and comprehensive pipe gallery excavation support. Permanent buildings, especially suitable for composite steel structure support piles and construction methods for foundation pit projects with tight construction schedules, low construction costs, and high requirements for deformation control. Background technique [0002] In recent years, with the vigorous development of underground construction in our country, the development and utilization of underground space has become increasingly prosperous. With the continuous rise of land prices, the use of underground space is becoming more and more urgent. Therefore, the planned underground buildings are close to the red line o...

AI Technical Summary

Problems solved by technology

Although the present invention achieves the purpose of high structural rigidity, soil-retaining and water-stopping functions, recyclable utilization, and application to deep foundation pits, it still has the following deficiencies: (1) After the construction of double-row steel sheet piles, the The land area is too large, so that the effective utilization rate of the land is low; (2) The H-shaped steel is installed in the middle of the two rows of steel sheet piles and connected by fasteners, which makes the construction difficult

Although the present invention has the advantages of rapid construction, good water-stop effect, and good deformation resistance, it still has the following disadvantages: (1) The I-beam is connected to the belly of the Larsen steel sheet pile, which increases the belly of the steel sheet pile stiffness, but the interface stiffness of Larsen steel sheet pile fasteners has not increased, so the weak link of the support structure has not been resolved; (2) A row of steel sheet piles can only form a water-stop function. The water situation is serious

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