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Method for protecting foundation of bridges and culverts slope connecting section

A technology for slope sections and foundations, applied in infrastructure engineering, roads, roads, etc., can solve the problems of complex construction technology, use of many building materials, and increase in project cost, and achieve the effect of simple construction technology and great application value.

Inactive Publication Date: 2006-06-28
SHANGHAI JIAO TONG UNIV
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  • Abstract
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Problems solved by technology

[0004] The present invention aims at the deficiencies of the above-mentioned prior art, and provides a comparatively economical method for foundation protection of the bridge-culvert slope section, which solves the existing problem that the construction cost increases due to the complicated construction process and the use of many building materials , the method is simple, and can greatly reduce the construction cost and construction period, and can also avoid the maintenance cost caused by differential settlement

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  • Method for protecting foundation of bridges and culverts slope connecting section
  • Method for protecting foundation of bridges and culverts slope connecting section
  • Method for protecting foundation of bridges and culverts slope connecting section

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Embodiment Construction

[0018] The following embodiments are provided in conjunction with the technical scheme of the present invention:

[0019] The invention is used to restore the foundation protection of the slope section of the box culvert of a certain high-grade road.

[0020] The site foundation is composed of 3 layers of soft clay; they are named Sc1, Sc2 and Sc3 respectively, and their thicknesses are Sc1=6.9m, Sc2=5m, Sc3=6.4m. The soft clay is a sediment in the marine environment, which has strong structure, high sensitivity and large compression. Below the soft clay is sandy soil. The void ratios of Sc1, Sc2, and Sc3 are 2.90, 2.43, and 2.20, respectively. The specific parameters during implementation are determined as:

[0021] 1. Settlement of the road within the design life of operation: the design CBR of the subgrade at the site is 8%, and the pavement layer thickness is determined to be 40cm according to the pavement structure calculation method with deflection as the design index...

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Abstract

The invention relates to a bridge connecting grade section foundation protecting method in building engineering technique field. It includes the following steps: confirming construction parameter including settling volume, stirring pipe length, connecting grade section foundation protecting range La and stirring pipe interval, and improved board thickness; enlarging deep layer stirring pipe from 1m to the maximum that means from bridge connecting to building side surface; mixing soft clay and concrete to use as road bed material and solidifying to form improved board. This can reduce the setting volume and differential settlement. The method is simple, and can greatly reduce construction cost and period, and avoid maintenance cost caused by differential settlement.

Description

technical field [0001] The invention relates to a method in the technical field of construction engineering, in particular to a relatively economical method for protecting the foundation of a bridge-culvert slope section. Background technique [0002] The phenomenon of vehicle jumping at the bridge head is a major problem in the design and construction of road engineering on soft soil foundation, and it is a long-term problem in the process of road use. This is due to the low embankment roads on soft soil foundations, which continuously generate post-construction settlements under the action of traffic loads, and the pile-based box culverts that cross the roads. The settlement of structures such as abutments is small. Therefore, a large differential settlement occurs at the joint between the road and the structure. In this way, environmental problems such as traffic vibration and noise will occur, and traffic will be hindered, thereby affecting driving speed and causing di...

Claims

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Application Information

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IPC IPC(8): E01C3/04E02D27/16E02D27/32
Inventor 沈水龙唐翠萍洪振舜许烨霜
Owner SHANGHAI JIAO TONG UNIV
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