现浇箱梁支架预压监测方法研究及数据分析
Research on preloading monitoring method and data analysis of cast-in-place box girder support
张超1
作者信息
- 1. 中交一航局第二工程有限公司,山东 青岛 266071
- 折叠
摘要
深中通道西人工岛非通航孔桥为现浇预应力连续箱梁,模板通过搭设的支架支撑,箱梁施工前需进行支架堆载预压.为了精确测量支架的各种变形量,为设置预拱度提供依据,结合箱梁支架搭设方式及堆载预压方法研究预压监测方法,提出了使用全站仪在支架底部进行竖向位移监测.该方法避免了人工读数偏差、视线遮挡等因素影响,可以快速、精确地获取预压过程中的变形数据,便于数据处理,保证了后续工序的及时开展,全站仪替代水准仪进行短距离竖向位移监测的方法也为竖向位移监测提供了新的思路.
Abstract
The non-navigable bridge on the west artificial island of the Shenzhen-Zhongshan Link is a continuous box girder with cast-in-place prestressing force,the formwork is supported by the erected supports,and the supports need to be preloaded before the construction of the box girder.In order to measure the deformation of the support accurately and provide the basis for setting the pre-camber,the preloading monitoring method was studied in combination with the setting method of the box girder support and the preloading method.A total station was proposed to monitor the vertical displacement at the bottom of the support.This method avoids the influence of factors such as artificial reading deviation and line of sight occlusion,and can obtain the deformation data quickly and accurately during the preloading process,it is convenient for data processing and ensures the timely development of the following working procedure,the method of short distance vertical displacement monitoring by total station instead of level also provides a new idea for vertical displacement monitoring.
关键词
箱梁/预压监测/全站仪/预拱度Key words
box girder/preloading monitoring/total station/pre-camber引用本文复制引用
出版年
2024
NETL
NSTL
万方数据