大跨径连续箱梁加固新浇混凝土裂缝原因及控制

林宝珠

doi:10.11835/j.issn.1674-4764.2006.05.015

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大跨径连续箱梁加固新浇混凝土裂缝原因及控制

更新时间：2023-11-28

- 大跨径连续箱梁加固新浇混凝土裂缝原因及控制
- Cause Analysis and Treatment Measure on Cracks in New Reinforced Concrete Restricted by Old Web Concrete
- 土木与环境工程学报（中英文） 2006年28卷第5期
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- DOI：10.11835/j.issn.1674-4764.2006.05.015
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- 纸质出版：2006
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林宝珠. 大跨径连续箱梁加固新浇混凝土裂缝原因及控制[J]. 土木与环境工程学报（中英文）, 2006,28(5).

LIN Bao - zhu. Cause Analysis and Treatment Measure on Cracks in New Reinforced Concrete Restricted by Old Web Concrete[J]. Journal of Civil and Environmental Engineering, 2006, 28(5).
林宝珠. 大跨径连续箱梁加固新浇混凝土裂缝原因及控制[J]. 土木与环境工程学报（中英文）, 2006,28(5). DOI： 10.11835/j.issn.1674-4764.2006.05.015.

LIN Bao - zhu. Cause Analysis and Treatment Measure on Cracks in New Reinforced Concrete Restricted by Old Web Concrete[J]. Journal of Civil and Environmental Engineering, 2006, 28(5). DOI： 10.11835/j.issn.1674-4764.2006.05.015.

摘要

介绍了一座主跨80m的多跨预应力混凝土变截面连续箱梁主桥，在维持通车情况下在箱内浇注大批量混凝土，但新浇腹板混凝土受到旧腹板约束而引起收缩裂缝，对新增混凝土裂缝情况介绍、原因分析及控制措施。

Abstract

In this paper

the cause analysis about cracks on the new concrete web poured in multi -span continuous box -girder of a main bridge was introduced. This bridge is a prestressed concrete one with variable cross sections and an 80 -meter main span. When casting reinforced concrete in large volume in box girder during vehicle transport service

the shrinkage cracks in cast -in place reinforced web concrete were formed due to the restriction of old web concrete. Then

the control measure taken on these cracks is discussed.

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