波浪荷载作用下桩周土体孔隙水压力试验研究

doi:10.16183/j.cnki.jsjtu.2018.07.001

上海交通大学学报 ›› 2018, Vol. 52 ›› Issue (07): 757-763.doi: 10.16183/j.cnki.jsjtu.2018.07.001

所属专题：王建华教授学报发文专辑

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波浪荷载作用下桩周土体孔隙水压力试验研究

吕豪杰¹^,²(), 周香莲²^,³(), 王建华¹^,³

^1.上海交通大学海洋工程国家重点试验室
^2.上海交通大学高新船舶与深海开发装备协同创新中心
^3.上海交通大学土木工程系，上海　200240

收稿日期:2017-04-25 出版日期:2018-07-01 发布日期:2021-06-04
通讯作者: 周香莲 E-mail:313266801lv@sjtu.edu.cn;zhouxl@sjtu.edu.cn
作者简介:吕豪杰（1993-)，男，浙江省台州市人，硕士生，研究方向为海洋岩土工程，E-mail: 313266801lv@sjtu.edu.cn.
基金资助:
国家自然科学基金资助项目(41372286)

Laboratory Study of Wave-Induced Pore Pressures Around the Pile

LÜ Haojie¹^,²(), ZHOU Xianglian²^,³(), WANG Jianhua¹^,³

^1.State Key Laboratory of Ocean Engineering
^2.Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration
^3.Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received:2017-04-25 Online:2018-07-01 Published:2021-06-04
Contact: ZHOU Xianglian E-mail:313266801lv@sjtu.edu.cn;zhouxl@sjtu.edu.cn

摘要/Abstract

摘要：

基于改造的圆筒试验设备，通过加载装置控制模型土体上方的波压力，实现对波浪荷载作用下的桩周土体响应试验的模拟．研究不同的波浪周期、波压力和土体相对密实度等参数对桩周土体孔隙水压力的影响；分析试验中土体孔隙水压力最大振幅值随深度的变化情况以及液化情况．结果表明：较小的波浪周期、波压力会使土体内孔隙水压力最大振幅值随深度衰减得更快；桩底附近的土体内孔隙水压力出现突然增大现象，即出现桩端孔压放大效应；波浪周期、波压力等对桩端孔压放大效应的影响较大．

关键词: 圆筒试验, 海洋桩基, 孔隙水压力, 土体液化

Abstract:

Based on the modified cylinder test equipment, the wave pressure is controlled by the loading device to simulate the response of the soil under wave loading. The effects of different wave periods, wave pressure, and soil relative density on the pore pressure around the pile are studied. The maximum amplitude of the pore pressure and the liquefaction of the seabed are analyzed. The results show that the smaller wave period, wave pressure and permeability make the maximum amplitude of pore water pressure attenuates more quickly. The pore pressure in the seabed soil near the pile bottom suddenly increases. The effect of wave period, wave pressure and permeability on the pore pressure is great.

Key words: cylinder test, offshore pile foundation, pore pressure, liquefaction

中图分类号:

吕豪杰, 周香莲, 王建华. 波浪荷载作用下桩周土体孔隙水压力试验研究[J]. 上海交通大学学报, 2018, 52(07): 757-763.

LÜ Haojie, ZHOU Xianglian, WANG Jianhua. Laboratory Study of Wave-Induced Pore Pressures Around the Pile[J]. Journal of Shanghai Jiao Tong University, 2018, 52(07): 757-763.

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参考文献 15

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参数	取值
G_s	2.57
e_max	0.745
e_min	0.487
D₅₀／mm	0.58
K／（m·s^-1）	1.4×10^-4（D_r＝46.7％，e＝0.624）
?	9.0×10^-5（D_r＝73.8％，e＝0.554）
S／％	97.9

传感器测点	z／cm
P1	-6.7
P2	-13.3
P3	-26.7
P4	-33.3
P5	-46.7
P6	-53.3
P7	-70.0
P2-1	-4.0
P2-2	-24.0
P2-3	-34.0
P2-4	-51.0
P2-5	-58.0

编号	2｜p_m｜／kPa	T／s	d／m	D_r／％
1	20	3	4.2	73.8
2	20	6	4.2	73.8
3	20	9	4.2	73.8
4	20	3	4.8	73.8
5	20	6	4.8	73.8
6	20	9	4.8	73.8
7	20	3	5.2	73.8
8	20	6	5.2	73.8
9	20	9	5.2	73.8
10	30	3	5.2	73.8
11	30	6	5.2	73.8
12	30	9	5.2	73.8
13	25	9	5.2	73.8
14	20	3	5.2	46.7
15	20	6	5.2	46.7
16	20	9	5.2	46.7
17	30	3	5.2	46.7
18	30	6	5.2	46.7

波浪荷载作用下桩周土体孔隙水压力试验研究

Laboratory Study of Wave-Induced Pore Pressures Around the Pile

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