Bedding rock surface bridge steel pipe support foundation and treatment method thereof

Abstract

The invention discloses a bedding rock surface bridge steel pipe support foundation and a treatment method thereof, and relates to the technical field of support foundation treatment methods. The bedding rock surface bridge foundation treatment method comprises the steps of S1, work before hole forming, S2, anchor cable hole drilling, S3, anchor cable lowering, S4, tension reaction beam and anchortool mounting, S5, load application, S6, load holding, and S7, unloading. According to the bedding rock surface bridge foundation treatment method, main ribs tops are subjected to pre-bending treatment before bearing platform steel reinforcing ribs are bound, the steel reinforcing rib anchorage capacity and bearing platform punching-resisting capability can be improved, based on the anchor cableframe beam principle, a jack is used for exerting tension force to a steel strand, whether the micro pile stress condition is consistent with calculation or not is verified, a seamless steel pipe is adopted for following so as to carry out micro pile hole drilling construction, it is ensured that a micro pile does not incline on a bedding rock surface, the pile can be formed completely, and hole collapses do not exist, the good effect is achieved in the complex flysch stratum, the micro pile adaptation of the flysch stratum is verified, and the method is simple, economical and convenient.

Description

technical field [0001] The invention relates to the technical field of support foundation treatment methods, in particular to a bridge steel pipe support foundation on a bedding rock surface and a treatment method thereof. Background technique [0002] Raw anti-slide pile foundation: Through the bearing capacity of the pile, the load is transmitted to the stable rock formation. There are two methods of pile formation: manual digging and mechanical drilling. [0003] 1. The safety risk of manual digging is high, and the efficiency of pile formation is low. Explosive excavation using pyrotechnics may easily cause rock surface loosening. [0004] 2. The construction period of mechanical hole forming is relatively long, and large-scale equipment is required to cooperate with the construction, which has strict requirements on the site, and the construction cost is high and uneconomical. Contents of the invention [0005] The purpose of the invention provided by the present inv...

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Problems solved by technology

[0003] 1. The safety risk of manual digging is high, and the efficiency of pile formation is low. Explosive excavation with pyrotechnics may easily cause rock surface loosening

[0004] 2. The construction period of mechanical hole forming is relatively long, and at the same time, large-scale equipment is required to cooperate with the construction, which has strict requirements on the site, and the construction cost is high and uneconomical

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