Test study of changing rules of excess pore water pressure during dynamic consolidation at subgrade of expressway in Yellow River flood area

LI Xiao-jing; LI Shu-cai; YAO kai; ZHU Shao-chun; Lü Guo-ren

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Test study of changing rules of excess pore water pressure during dynamic consolidation at subgrade of expressway in Yellow River flood area

更新时间：2026-06-25

- Test study of changing rules of excess pore water pressure during dynamic consolidation at subgrade of expressway in Yellow River flood area
- Vol. 32, Issue 9, (2011)
- 作者机构：
  
  1. 山东建筑大学土木工程学院,济南,250101
  2. 山东大学岩土与结构工程研究中心,济南,250061
  3. 山东大学土建与水利学院,济南,250061
  4. 滨州市公路勘察设计院,山东,滨州,256600
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU472
- Online First：13 September 2011，
  
  Published：2011
- 稿件说明：
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LI Xiao-jing, LI Shu-cai, YAO kai, et al. Test study of changing rules of excess pore water pressure during dynamic consolidation at subgrade of expressway in Yellow River flood area[J]. 2011, 32(9).
DOI：

LI Xiao-jing, LI Shu-cai, YAO kai, et al. Test study of changing rules of excess pore water pressure during dynamic consolidation at subgrade of expressway in Yellow River flood area[J]. 2011, 32(9). DOI：

摘要

滨德高速公路所经地区主要由黄河冲积而成，场区地层以粉土和粉质黏土为主。在试验区不同地层深度处埋设孔隙水压力计，通过观测、分析强夯各个过程中超孔隙水压力的变化规律，得出以下结论：在2 000 kN•m夯击能的作用下，第1～2遍夯击时最佳夯击数为8～9击，第3遍夯击时最佳夯击数为6～8击；夯击后，浅层的超孔隙水压力基本均大于深层的超孔隙水压力，消散时间也相对较长，并且浅层孔隙水压力受夯击影响的水平距离较深层的大；在2 000 kN•m夯击能的作用下，强夯最大影响深度为8～9 m，有效加固深度为6～8 m，有效加固深度系数? =0.134～0.179；6～7 m深处孔隙水压力水平最大影响距离小于10 m，有效影响宽度基本为5～7 m。

Abstract

The subgrade of Binde Expressway mainly consist of silt and silty clay. The dissipation rule of excess pore water pressure could reflect the reinforcement effect of soil. Pore water pressure gauges were embedded in the test section. By analyzing the changing rules of excess pore water pressure

some conclusions are drawn as follows. When the test section is striked by the tamping energy of 2 000 kN•m，the best hitting number is 8-9 during the first and second passes; the best hitting number is 6-8 during the third pass. The excess pore water pressure of shallow place is higher than that of deeper place; and the excess pore water pressure of shallow place dissipated slowly. The maximum impacting depth is 8-9 m and the effective impacting depth is 6-8 m; the ratio of the effective impacting depth is 0.134-0.179. The maximum horizontal impacting distance is less than 10 m

and the effective horizontal impacting distance is about 5-7 m

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