Reinforcing and lifting method for large abutment of high-speed rail

Abstract

The invention discloses a reinforcing and lifting method for a large abutment of a high-speed rail, and relates to the technical field of pier lifting. The technical scheme of the reinforcing and lifting method comprises the following construction steps that pile shoe body grouting holes are obliquely drilled downwards in the periphery of a pier bearing platform, the hole bottom does deep into theside position of a pile foundation close to the base end of a pier pile, the hole bottom is grouted, soil bodies among the multiple pile foundations and on the peripheries of the pile foundations arereinforced, and pile shoe bodies are formed; holes are obliquely drilled downwards in the periphery of the pier bearing platform to form a plurality of spaced curtain holes, the curtain holes are grouted to form an enclosed curtain wall, and an inverted groove structure is formed by the curtain wall and the pile shoe body; holes are obliquely drilled downwards to form lifting holes, and the lifting holes go deep into the bottoms of the pile foundations; and pressure grouting is conducted on the bottom of the lifting holes, and the pier is gradually lifted to the required height along with continuous increasing and rapid solidification of grout in the enclosed range of the curtain wall. The reinforcing and lifting method has the advantages that lifting of the large abutment is realized; and secondary settlement of the lifted bridge pier is effectively prevented.

Description

technical field [0001] The invention relates to the technical field of settlement treatment of large high-speed railway piers, in particular to a method for strengthening and lifting large high-speed railway piers. Background technique [0002] At present, with the development of my country's economy, the construction of high-speed railways is also increasing. Compared with ordinary speed railways, high-speed railways have higher requirements for track smoothness. However, at present, the piers of some high-speed rail lines that have been in operation have suffered settlement, which has seriously affected the smoothness of the track and the comfort of passengers. Therefore, the track needs to be lifted and leveled. In the prior art, when the settlement is not large, grouting is generally performed between the integral ballast bed and the beam body at the bottom of the track; when the settlement is large, the method of raising the bottom support of the beam body is used for a...

AI Technical Summary

Problems solved by technology

However, the patented technology needs to jack up the beam before rotating the height-adjusting support. When the beam is a continuous beam, the weight of the beam is too heavy to be lifted by equipment

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