Multi-anchoring point antisliding pile adapted to multilayer slide surface and deep sliding face

Abstract

The present invention discloses one kind of multiple anchor point anti-slide pile suitable for multiple slide plane condition and deep slide plane condition and its construction process. The construction process includes the following steps: excavating pile well and setting pile stem protecting wall in sections; boring hole in proper depth, installing anchor cable, grouting and tensing the anchor cable temporarily onto the protecting wall; further downward excavating and repeating the forgoing said steps until installing the lowest anchor cable; further excavating the pile well to designed depth; assembling reinforcing cage inside the pile well; tensing anchor cables and locking; and final pouring pile concrete to complete the pile construction.

Description

technical field [0001] The invention relates to supporting and anchoring measures in geotechnical engineering slopes, deep foundation pit supporting, landslide prevention and other projects, including the setting method of anti-sliding piles and anchor cables and the piles formed by the method. The invention is applicable to many fields such as roads, railways, water conservancy and hydropower buildings, urban buildings and the like. The anti-slide pile of the present invention is to arrange the pile body poured by reinforced concrete in the landslide body, and make the lower end of the pile body embedded in the stratum below the sliding surface, and the cantilever section of the pile body is provided with a prestressed anchor cable, The anchoring end of the prestressed anchor cable is also embedded in the stable formation below the sliding surface. Background technique [0002] In order to prevent the hazard and impact of landslides on buildings, it is necessary to set up ...

AI Technical Summary

Problems solved by technology

[0011] 1. Since the anchor cable of this patent is set at the pile head, it is easy to generate stress concentration at the pile head

[0012] 2. In this patent, in order to obtain the best anchoring effect, it is often necessary to arrange porous anchor cables at the pile head. These anchor cables are too concentrated at the anchoring ends, which is easy to form a group anchor effect, resulting in pull-off failure

[0013] 3. The tension of this kind of pile is concentrated at one point, although the internal force of the pile body is smaller than that of the anti-slide pile without anchor cable, but it is still relatively large. To solve this problem, it is still necessary to use a larger pile section, so its The amount of steel reinforcement is large, the amount of concrete required is also large, and its economy becomes poor

[0015] 5. The deeper the anchor cable hole, the longer the steel strand required, resulting in an increase in cost, and it is also very difficult to install the anchor

At the same time, due to the use of longer anchor cables, the large absolute elastic deformation brought by the long anchor cables will relatively reduce the pulling effect on the pile during the load-bearing process, which will affect the effect of use.

[0016] 6. For some large and complex landslides (with large landslide thrust), landslides with deep sliding surfaces, and landslides with multiple layers of sliding surfaces, the effect will be worse and the defects will become more obvious

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