Integrated embedding type skewback foundation excavation construction method

A construction method and basic technology, applied in basic structure engineering, excavation, erection/assembly of bridges, etc., can solve problems such as difficulty in adapting to the water level height difference in the fractured zone, achieve a reasonable and reliable construction method, reduce the time of slag production, and speed up The effect of construction progress

Inactive Publication Date: 2019-06-11
中铁广州工程局集团桥梁工程有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction method of the integral embedded abutment foundation in the prior art is difficult to adapt to the construction conditions of large water level difference and strong water conductivity in the fractured zone

Method used

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  • Integrated embedding type skewback foundation excavation construction method
  • Integrated embedding type skewback foundation excavation construction method
  • Integrated embedding type skewback foundation excavation construction method

Examples

Experimental program
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Embodiment Construction

[0038] refer to Figures 1 to 10 , a construction method for excavating an integral embedded abutment foundation, which can fix a concrete abutment foundation 2 on a slope surface 1, comprising the following steps:

[0039] Step 1, the first section of drilling, including drilling some back cover grouting holes 3 and some curtain grouting holes 4 arranged around the back cover grouting holes 3, after the back cover grouting holes 3 and curtain grouting holes 4 are drilled, respectively Insert the steel pipe, and the outer wall of the steel pipe fits the inner wall of the grouting hole. The role of the steel pipe is to ensure the stability of the hole in the early stage and not to collapse the hole, and to increase the lateral stiffness of the foundation pit and improve the stability of the foundation pit.

[0040] Step 2, the first section of grouting, grouting the back cover grouting hole 3 and the curtain grouting hole 4 drilled in step 1.

[0041] Step 3, the second sectio...

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Abstract

The invention discloses an integrated embedding type skewback foundation excavation construction method, and relates to bridges. The method comprises the steps that at least two steps are excavated ona slope, specifically, the first step is excavated on the slope at first, then, the second step is excavated below the first step, and the rest steps continue being excavated downwards in sequence, wherein the excavation depth of the first step is the largest, and the excavation depth of the follow-up steps is gradually decreased. The method has the beneficial effects that by arranging the multiple steps, the construction problems of large-gradient excavation and hole opening eccentric compression can be solved, and surrounding soil body displacement can be reduced advantageously; and the construction method is reasonable and reliable, the deslagging time can be shortened, and construction progress is accelerated.

Description

technical field [0001] The invention relates to bridges, in particular to an excavation construction method for integrally embedded and fixed abutment foundations. Background technique [0002] As a common structural form across rivers, lakes and seas, bridges are often used on every traffic network. There are more and more types of foundation forms for bridges. [0003] The original geology of the fissure fracture zone is fractured granite with joints, poor geological conditions, rich groundwater, and rapid river water supply. The general abutment construction method is difficult to adapt to the crack fracture zone. [0004] The abutment is a cast-in-place concrete structure set at the connection between the arch ring of the bridge and the pier and the arch ring and the ventral pier of the building on the hollow arch. [0005] The overall embedded abutment foundation has the characteristics of large section, large depth and large slope, and most of the abutment foundatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E02D15/04E02D17/02
Inventor 周文冯朝军王远锋朱志钢孙军刑锋杨景新熊文宇连晖张峰梁锋卢伟康赵卫星
Owner 中铁广州工程局集团桥梁工程有限公司
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