A method of dealing with bridge head jumping based on portal cement mixing wall

A technology of bridge head jumping and cement mixing piles, which is applied to bridges, bridge parts, bridge construction, etc., can solve the problems of large proportion of repair materials and large foundation settlement, so as to reduce construction cost, increase bearing capacity and shear strength, reduce The effect of small lateral deformations

Active Publication Date: 2011-12-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These repair methods can temporarily meet the settlement requirements, but due to the large proportion of the repair materials, the foundation settlement will become larger and larger as the repairs are repeated again and again.

Method used

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  • A method of dealing with bridge head jumping based on portal cement mixing wall
  • A method of dealing with bridge head jumping based on portal cement mixing wall
  • A method of dealing with bridge head jumping based on portal cement mixing wall

Examples

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Embodiment 1

[0025] Embodiment 1, the transition section between highway abutment 1 and the embankment in a certain soft soil area is 50m long, the filling height is 3m, the road width is 26.5m, and the foundation 9 has a strong structure of 3 layers with a thickness of 11.9-18.3m. Constructed of soft clay with high sensitivity and great compression.

[0026] The processing range of portal cement mixing wall 11 is 30m in length, and the cement mixing piles are in a single row. The wall treatment section 4 is taken as 9m, the pile diameter is uniformly 500mm, and the lap length is uniformly 100mm; the geomembrane used as the horizontal anti-seepage layer adopts the form of a single-layer geomembrane anti-seepage layer with a thickness of 1mm.

[0027] At the abutment and the embankment adjacent, the settlement after 2500 days after construction is only 74mm, meeting the requirement of post-construction differential settlement within 100mm. By repairing the road surface during the overh...

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Abstract

The invention discloses a method for solving bump of a vehicle at the bridge head on the basis of a door type cement mixing wall. The method is characterized by comprising the following steps of: 1) piling continuous cement mixing piles on two sides of a road at two ends of a bridge abutment; 2) piling the cement mixing piles with lengths of piles gradually reducing from the bridge abutment; and 3) hermetically paving a geomembrane at the bottom of a roadbed between the continuous cement mixing piles. The method has the advantages of prolonging maintenance time limit by constructing the door type cement mixing wall, guaranteeing to control sediment within 10 cm in a heavy repair period, avoiding renovation before the heavy repair, reducing lateral deformation of the foundation, improving bearing capacity and shearing strength of soil, greatly reducing manufacturing cost compared with other methods on the basis of reducing the final settlement quantity of the foundation, not damaging the constitutive property of the foundation, and completely exerting the natural strength of the foundation.

Description

technical field [0001] The invention relates to the field of expressway construction and maintenance, in particular to a method for dealing with bridge head jumping based on a portal cement mixing wall. Background technique [0002] The phenomenon of vehicle jumping at the bridge head makes the transportation function of the highway unsatisfactory, shortens the service life of vehicles, and affects traffic safety. The problem of vehicle jumping at the bridge head has become an internationally recognized road traffic technical problem for a long time. The main reason for this lies in the sudden change of rigidity and flexibility at the bridge head. The abutment is a rigid structure, and the foundation is set on a better bearing layer. The settlement is basically zero, and the embankment fill and foundation have consolidation. Due to the nature of compression and creep, non-recoverable plastic deformation occurs under the action of self-weight, vehicle vertical load and impact...

Claims

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Application Information

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IPC IPC(8): E01C3/04E02D27/12E01D19/02
Inventor 唐晓武申昊姚远
Owner ZHEJIANG UNIV
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