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A platform for research: civil engineering, architecture and urbanism
Opposite-pull type prestressed pipe pile foundation pit supporting structure and mounting method thereof
The invention discloses an opposite-pull type prestressed pipe pile foundation pit supporting structure and a mounting method of the opposite-pull type prestressed pipe pile foundation pit supporting structure, and belongs to a foundation pit reinforcing structure. Supporting pipe pile tops and/or pile bodies on the two sides of a convex corner of the foundation pit supporting structure are provided with a plurality of opposite-pull anchor cables. The mounting method includes the steps that after supporting pipe pile and pile top crown beam construction is finished, steel pipes are embedded in the pile tops, and the design strength of the concrete of pile top crown beams reaches 75%, the supporting pipe pile top opposite-pull anchor cables are mounted through excavation slotting or mechanical drilling and pre-tightened, tensioned and locked; then, waist beams are arranged or poured on the anchor cable arrangement portions, where a foundation pit is excavated to, among supporting pipe piles, the anchor cables are arranged in a penetrating mode after mechanical pore-forming is conducted, the anchor head portions on the two sides of the anchor cables are pulled oppositely, and the pre-applied stress is applied to achieve lock, so that the pipe pile supporting structure that the two ends of the anchor cables are balanced in opposite pull stress is formed. By means of the opposite-pull type prestressed pipe pile foundation pit supporting structure and the mounting method, the span among pipe pile supporting points is reduced, the defect that the prestressed pipe pile anti-bending performance and anti-shear performance are insufficient is made up for, and the applicability of the prestressed pipe piles is improved on the aspect that the pipe pile is not suitable for 8-degree seismic fortification regions.
Opposite-pull type prestressed pipe pile foundation pit supporting structure and mounting method thereof
The invention discloses an opposite-pull type prestressed pipe pile foundation pit supporting structure and a mounting method of the opposite-pull type prestressed pipe pile foundation pit supporting structure, and belongs to a foundation pit reinforcing structure. Supporting pipe pile tops and/or pile bodies on the two sides of a convex corner of the foundation pit supporting structure are provided with a plurality of opposite-pull anchor cables. The mounting method includes the steps that after supporting pipe pile and pile top crown beam construction is finished, steel pipes are embedded in the pile tops, and the design strength of the concrete of pile top crown beams reaches 75%, the supporting pipe pile top opposite-pull anchor cables are mounted through excavation slotting or mechanical drilling and pre-tightened, tensioned and locked; then, waist beams are arranged or poured on the anchor cable arrangement portions, where a foundation pit is excavated to, among supporting pipe piles, the anchor cables are arranged in a penetrating mode after mechanical pore-forming is conducted, the anchor head portions on the two sides of the anchor cables are pulled oppositely, and the pre-applied stress is applied to achieve lock, so that the pipe pile supporting structure that the two ends of the anchor cables are balanced in opposite pull stress is formed. By means of the opposite-pull type prestressed pipe pile foundation pit supporting structure and the mounting method, the span among pipe pile supporting points is reduced, the defect that the prestressed pipe pile anti-bending performance and anti-shear performance are insufficient is made up for, and the applicability of the prestressed pipe piles is improved on the aspect that the pipe pile is not suitable for 8-degree seismic fortification regions.
Opposite-pull type prestressed pipe pile foundation pit supporting structure and mounting method thereof
KANG JINGWEN (author) / YAN BIN (author) / ZENG DEQING (author) / LI ZHENGKUN (author) / HU ZHIGANG (author) / LIU XINGGUO (author) / ZHANG XUELIANG (author) / FU BINZHEN (author) / LIU YONGHONG (author) / DENG YIMING (author)
2015-04-22
Patent
Electronic Resource
English
IPC:
E02D
FOUNDATIONS
,
Gründungen
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