Combined retaining structure and construction method thereof

Abstract

The invention relates to a combined retaining structure and a construction method thereof. The combined retaining structure comprises anti-sliding piles, connecting beams, a ribbed soil retaining wall, rigid panels and connecting components. The anti-sliding piles penetrate a covering soil layer and are anchored in a stable stratum. The anti-sliding piles are arranged in parallel, and the connecting beams are arranged at the tops of the anti-sliding piles. The rigid panels are arranged at the tops of the connecting beams. The ribbed soil retaining wall is built behind the rigid panels. The connecting components are arranged between the rigid panels and the ribbed soil retaining wall and connected with the rigid panels and the ribbed soil retaining wall respectively. The combined retaining structure is high in adaptability to foundations and sites, higher in overall rigidity, good in stability, convenient to construct, large in building height, good in anti-seismic property and suitable for highfill projects on complex terrains of western mountainous areas.

Description

technical field [0001] The invention belongs to the field of slope stability support in geotechnical engineering, and relates to a combined retaining structure and a construction method thereof, in particular to a combined retaining structure suitable for high filling engineering on complex terrain in western mountainous areas and a construction method thereof. Background technique [0002] In recent years, with the large-scale construction of transportation infrastructure in western my country, a large number of high-filling projects on complex terrain in mountainous areas have appeared. Such high-filling projects often have the following characteristics: (1) The filling height is large, reaching several Tens to hundreds of meters, large deformation after construction; (2) Located on valleys, steep slopes and other terrains, the site is narrow, and it is difficult for large-scale construction machinery to enter the site; (3) The slope is steep, and the stability of the coveri...

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Problems solved by technology

The disadvantages are: (1) It is not suitable for landslides, water erosion and other unfavorable geological areas; (2) The panel stiffness of traditional turn-up and modular reinforced earth retaining walls is small, and the single-stage wall height is generally below 10m If it is too high, it is easy to cause large wall deformation or overall instability, and at the same time, it is easy to cause a large-scale collapse due to local tie breakage; (3) Even if the overall cast-in-place reinforced concrete panel is used, the traditional process is to pour the panel first Refilling, at this time, it will be difficult to compact the filling soil behind the wall, and the settlement difference between the face plate and the reinforced soil is relatively large, and the reinforcement material is directly connected to the face plate, and it is easy to cause the filling soil compaction construction and the excessive foundation difference. connection failure due to subsidence

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