Sensor protection techniques of super-large deep-water pile group foundation

CHEN Zhi-jian; CHEN Xin-di; TANG Yong; ZHANG Ning-ning

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Sensor protection techniques of super-large deep-water pile group foundation

更新时间：2026-06-25

- Sensor protection techniques of super-large deep-water pile group foundation
- Vol. 33, Issue 11, (2012)
- 作者机构：
  
  1. 河海大学地球科学与工程学院,南京,210098
  2. 河海大学港口海岸与近海工程学院,南京,210098
  3. 福建省建筑科学研究院,福州,350025
  4. 华电电力科学研究院,杭州,310030
- 作者简介：
- 基金信息：
- DOI：
  CLC： U44
- Online First：14 November 2012，
  
  Published：2012
- 稿件说明：
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CHEN Zhi-jian, CHEN Xin-di, TANG Yong, et al. Sensor protection techniques of super-large deep-water pile group foundation[J]. 2012, 33(11).
DOI：

CHEN Zhi-jian, CHEN Xin-di, TANG Yong, et al. Sensor protection techniques of super-large deep-water pile group foundation[J]. 2012, 33(11). DOI：

摘要

苏通大桥主塔墩群桩基础是世界上规模最大的群桩基础，由131根长117 m的超长钻孔灌注桩组成。在这样的工程环境下工作的传感器不仅要承受巨大的压力作用，还受一些施工因素影响，极易损坏。为了提高传感器埋设的成活率，经过多次现场试验，提出了包括混凝土应变计、表面应变计、静力水准和水深传感器等多种传感器的保护技术。传感器保护技术的实施，使得传感器成活率得到保证，整个监测系统的平均成活率超过96%。并利用实测数据分析了超长桩的荷载传递和不均匀沉降规律，结果表明，超长钻孔灌注桩的荷载传递规律有别于一般的桩基础；大型群桩基础的不均匀沉降主要表现在横桥向，纵桥向的不均匀沉降可以忽略。

Abstract

The pile group foundation of Sutong bridge is the largest in the world. It is composed of 131 overlength cast-in place bored piles which are 117 m long. The sensors worked under this engineering environment must subject to large pressure

as well as construction factors

and they damage easily. In order to improve the installing survival rate of the sensors

some sensor protection techniques are put forward after several field tests

including concrete strain gauge

surface strain gauge

hydrostatic level and water pressure gauge. The installing survival rate of sensors can be ensured by implementation of sensor protection techniques. The average survival rate exceeds 96%. The rules of load mechanism and uneven settlement are analyzed by monitoring data. The results show that the load mechanism of overlength cast-in place bored piles is different with the piles in common. The uneven settlement of large-scale pile group foundation appears in the direction across bridge; and the uneven settlement in longitudinal direction can be ignored.

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