上海大学学报(自然科学版) ›› 2016, Vol. 22 ›› Issue (6): 821-828.doi: 10.3969/j.issn.1007-2861.2016.05.014

• 土木工程 • 上一篇    

水利护岸结构施工对临近地下已有原水管线的影响

蔡育   

  1. 上海勘测设计研究院有限公司, 上海 200434
  • 收稿日期:2016-05-20 出版日期:2016-12-30 发布日期:2016-12-30
  • 通讯作者: 蔡育(1983—), 男, 工程师, 研究方向为水利水电工程设计. E-mail: caiyu@sidri.com
  • 作者简介:蔡育(1983—), 男, 工程师, 研究方向为水利水电工程设计. E-mail: caiyu@sidri.com

Influences of the water conservancy revetment structure construction to the adjacent underground raw water pipeline

CAI Yu   

  1. Shanghai Investigation, Design and Research Institute Co., Ltd., Shanghai 200434, China
  • Received:2016-05-20 Online:2016-12-30 Published:2016-12-30

摘要:

结合大芦线航道整治二期工程, 研究分析了水利护岸结构施工对临近地下已有原水管线的影响. 分析结果表明, 除了桩基的挤土效应外, 施工还会对结构沉降、土体振动、预钻孔塌孔、上部荷载变化等产生影响. 考虑采用相应的工程措施来减轻影响, 包括原位监测、控制沉桩速率、桩基跳打、限制日打桩数量、预钻孔打桩、考虑前排桩基遮帘作用施工、预钻孔护壁等. 工程实践证明, 当采用以上措施后, 对已有原水管线的影响减弱, 效果良好. 相关措施可供类似工程参考.

关键词:  超孔隙水压力 ,  挤土效应 ,  塑性区, 原水管线

Abstract:

Combined with the 2nd Da Lu waterway regulation project, water conservancy revetment constructions on the existing adjacent underground water supply pipelines were investigated. Besides the squeezing soil effect of the piles, the project also influenced the settlement of the structure and soil vibration, pre-drilling hole collapse, change of upper load, and so forth. To reduce the influence, some measures were taken, including in situ monitoring, control of sink rate of pile, and seperate pilling of neighboring pile foundations, restrictions on piling quantity, pre-drilled piling, considering the front pile curtain effect,
and pre-borehole wall protection. The practice results showed that these measures were effective and could be used for the similar projects.

Key words:  excess pore water pressure ,  plastic zone,  squeezing soil effect , raw water pipeline