矩形顶管施工技术在下穿既有雨水箱涵施工中的应用

Application of Rectangular Pipe Jacking Construction Technology in the Construction of Underpassing Existing Rainwater Tank Culvert

为了保证雨水箱涵结构与功能的稳定性,研究了一种矩形顶管施工技术,在下穿既有雨水箱涵施工中的应用方案。文章分析工程概况,计算矩形顶管力学参数,在矩形顶管下穿施工前,应用注浆纠偏技术,保证雨水箱涵的安全性。施工质量检验结果显示,施工区域的最大地表沉降量-15.26 mm,雨水箱涵结构最大沉降量0.62 mm,表明施工效果优良,在完工后的一个月内,实际测量的雨水箱涵周围的地下水位变化平稳,表明雨水箱涵整体结构稳定,施工质量优良。

In order to ensure the stability of the structure and function of the rainwater tank culvert, a rectangular pipe jacking construction technology is studied, and its application scheme in the construction of the existing rainwater tank culvert is studied. Analyze the general situation of the project, calculate the mechanical parameters of the rectangular pipe jacking, and apply the grouting correction technology before the construction of the rectangular pipe jacking to ensure the safety of the rainwater tank culvert. The construction quality inspection results show that the maximum surface settlement of the construction area is 6.31mm, and the maximum settlement of the rainwater box culvert structure is 0.62mm, indicating that the construction effect is excellent. Within one month after completion, the actual measured groundwater level changes around the rainwater box culvert. It is stable, indicating the stability of the overall structure of the rainwater tank culvert and the excellent construction quality.