Metro engineering pile foundation underpinning construction method

A construction method and technology of engineering piles, applied in the direction of infrastructure engineering, construction, etc., can solve the problems of large investment, complicated construction process, and impact on the surrounding environment, and achieve the effect of saving investment

Active Publication Date: 2008-05-28
CHINA RAILWAY 18TH BUREAU GRP CO LTD
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Problems solved by technology

[0002] At present, in municipal underground projects, there are many situations where spaces intersect with bridges and passage facilities or pass by. Most of the solutions adopted are to d

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  • Metro engineering pile foundation underpinning construction method
  • Metro engineering pile foundation underpinning construction method
  • Metro engineering pile foundation underpinning construction method

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Embodiment Construction

[0014] The tunnel between Huangzhuang Station and Kenan Road Station (hereinafter referred to as Huangke Section) of Beijing Metro Line 10 is constructed by shallow buried underground excavation method. The tunnel passes through Zhichun Road and runs east-west along Zhichun Road. The tunnel on the right line of the section passes under the pedestrian bridge of Zhichun Building at k2+629.983, and the section tunnel crosses the pile foundation of the bridge in space. This section is the bell-mouth separation section of the interval line, and the tunnel structure is in the form of a double-arch section, which is constructed by the middle-hole method. The main girder of the upper structure of Zhichun Building Pedestrian Bridge is a three-span continuous two-chamber closed steel girder, the ladder girder is a simply supported steel step plate, and the bridge piles are φ1000 bored piles with a length of 15.2m. The buried depth of the tunnel roof at this place is 8.348m. The main pil...

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Abstract

The invention relates to a railway engineering pile foundation underpinning construction method, the procedures comprise reinforcing the ground, namely, a pedestrian bridge is supported by a steel pipe scaffold on the ground, and processing in a cave, firstly, concrete which is distributed on the surface layer of a pile is removed, secondly, enciphering grids are set up, thirdly, muscles are planted and formwork lining umbrella arch is poured, fourthly, piles are sectionalized and secondary lining concrete is poured, namely, when the formwork lining on the lower portion of support at primary stage achieves the intensity which is designed, base piles in tunnel lining is removed, and boundary agent is brushed, and a foam board bedding layer is further arranged, and a water-protecting layer is made, and space interval structure formwork lining is poured. The invention has the advantages that firstly, the monitor measure data of on site construction shows that the largest sedimentation of pile accumulation is 8047mm, and the largest discrepancy sedimentation is 291mm. Cracks are not founded during the construction period though the observation of a hat beam, and sedimentation of piles and bending deflection of the hat beam is designed in the regulated scope, and the deformation rule conforms to the design account, which fully shows that underpinning design of piles is reliable and safe, secondly, the invention saves investment.

Description

Technical field: [0001] The invention belongs to a building construction method, in particular to a subway engineering pile foundation underpinning construction method. Background technique: [0002] At present, in municipal underground projects, there are many situations where spaces intersect with bridges and passage facilities or pass by. Most of the solutions adopted are to demolish and modify existing bridges and passage facilities. This method is complicated in construction process, poor in safety, and large in investment. And seriously affect the surrounding environment. Invention content: [0003] The purpose of the present invention is to overcome the shortcomings in the above-mentioned prior art, and provide a construction method for pile foundation underpinning in subway engineering, the construction process of which is simple, safe and reliable. [0004] The technical solution of the present invention is: a subway engineering pile foundation underpinning const...

Claims

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Application Information

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IPC IPC(8): E02D35/00
Inventor 童顺军黄广锴安建平
Owner CHINA RAILWAY 18TH BUREAU GRP CO LTD
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