Existing railway roadbed micropile reinforcing structure under operation condition

Abstract

The invention discloses an existing railway roadbed micropile reinforcing structure under the operation condition. The structure is composed of a small-diameter reinforced concrete pile and connection beams at two ends of the reinforced concrete pile which is horizontally installed in a roadbed. Reinforcement cages or steel pipes or preformed piles are inserted into drill holes and mortar pouring is conducted to constitute the small-diameter reinforced concrete pile, and the drill holes are horizontally formed in the side slope of an embankment in a continuous mode or at intervals; the connection beams are of reinforced concrete structures and arranged at two ends of the small-diameter reinforced concrete pile, and reinforcing steel bars in the connection beams are connected with the reinforcement cages or the steel pipes or the preformed piles in the small-diameter reinforced concrete pile. The existing railway roadbed micropile reinforcing structure under the operation condition has the advantages of being strong in structural integrality, reliable in pile-forming quality, low in price, convenient to construct and the like.

Description

technical field [0001] The invention belongs to the technical field of railway embankment reinforcement technology, and relates to an existing railway embankment reinforcement technology under operating conditions, in particular to an existing railway embankment micro pile reinforcement structure using reinforced concrete piles. Background technique [0002] After the heavy-load capacity expansion and reconstruction of existing railways and the speed-up reconstruction of existing railways, due to the increase of train axle load and the increase of train speed, the dynamic stress acting on the subgrade surface has increased significantly, and the subgrade strength that does not meet the requirements of heavy-duty expansion needs to be adjusted. Reinforce the existing subgrade sections that can meet the requirements of speed-up reconstruction to ensure the safety of train operation. [0003] Among the existing reinforcement methods such as inclined cement-soil piles, grouting,...

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Problems solved by technology

[0006] However, the oblique cement-soil pile method is difficult to guarantee the pile quality of the rotary grouting pile, and the grouting method has poor adaptability to subgrade filling, poor controllability, and problems such as grouting and grouting.

At the same time, because there is no steel material in the rotary grouting pile, its bending resistance is relatively poor, and it is easy to crack or break the pile during operation.

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