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Soft soil area railway station platform subsidence mini-pile repairing structure and construction method

A technology for repairing structures and micro-piles, which is applied in basic structure engineering, sheet pile walls, buildings, etc., can solve the problems of narrow construction site, limited construction height, and high construction equipment, and achieve the effect of avoiding intrusion.

Pending Publication Date: 2017-09-01
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the narrow construction site and limited construction height in the station platform area, the conventional foundation treatment methods in the foundation treatment of railway subgrades, such as mixing piles, CFG piles, and pipe piles, require tall and heavy construction equipment, which cannot be implemented

Method used

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  • Soft soil area railway station platform subsidence mini-pile repairing structure and construction method
  • Soft soil area railway station platform subsidence mini-pile repairing structure and construction method
  • Soft soil area railway station platform subsidence mini-pile repairing structure and construction method

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Such as figure 1 As shown in the present invention, a subsidence mini-pile repair structure of a railway station platform in a soft soil area includes reinforcement holes 9 arranged in the subgrade fill soil 3 in the area to be repaired on the platform. The hollow seamless steel pipe 2 is adopted, the outer diameter of the hollow seamless steel pipe 2 is 90-200 mm, the wall thickness is 5-10 mm, and the vertical direction is connected by joints. The hollow seamless steel pipe 2 is provided with grouting eyes for grouting out along the periphery, and the grouting eyes are arranged in a quincunx shape. The cement slurry is injected from the top of the hollow seamless steel pipe 2 and solidified inside and outside the hollow seamless steel pipe 2 to form a micro pile 1. The bottom of the micro pile 1 goes deep below the soft soil...

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Abstract

The invention discloses a soft soil area railway station platform subsidence mini-pile repairing structure and a construction method. The structure comprises a reinforcing hole formed in roadbed filled soil of a to-be-repaired area of a station platform, a mini-pile is arranged in the reinforcing hole, and the mini-pile adopts a hollow seamless steel tube; the hollow seamless steel tube is provided with slip casting holes supplied for cement slurry out-pouring along the periphery, cement slurry is injected from the top of the hollow seamless steel tube, and the mini pile is formed after the cement slurry is solidified at the interior and exterior of the hollow seamless steel tube. The bottom of the mini-pipe goes deep into a soft soil foundation of the station platform, and the top of the mini-pipe is flush with the platform surface. According to the soft soil area railway station platform subsidence mini-pile repairing structure and the construction method, the defect that the construction equipment cannot be used for the station platform due to the fact that the construction equipment such as traditional mixing piles, CFG piles and tubular piles is tall, big and heavy is overcome, the characteristics that mini-pile pore-forming equipment is small, and suitable for the narrow and small space are utilized, the station platform with the limited height is subjected to foundation reinforcement, the load of the station platform and the roadbed filled soil is undertaken through the mini-pipe, so the subsidence of the platform is controlled.

Description

technical field [0001] The invention relates to the field of railway embankment engineering, in particular to a repair structure and construction method of subsidence miniature piles on railway station platforms in soft soil areas. Background technique [0002] Soft soil foundation is the most common special soil roadbed in my country's railway construction. Because soft soil has the characteristics of high moisture content, high void ratio, low strength, and high compressibility, the settlement of the foundation is very large when the roadbed is filled on it. . [0003] At present, whether it is a normal-speed railway or a high-speed railway, there are many stations built on soft soil foundations, and the soft soil foundations of lacustrine plains and marine plains in East China, South China, and coastal areas are the most typical. In the early general-speed railway, the platform of the station on soft soil foundation basically did not undergo foundation treatment, and the ...

Claims

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Application Information

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IPC IPC(8): E02D5/64
CPCE02D5/64
Inventor 陈尚勇孙红林赵新益田光盛吴成杰杭红星邓天天
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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