1.中交一公局第三工程有限公司,北京 100024
2.河北省土木工程诊断、改造与抗灾重点实验室,河北 张家口 075000
3.河北建筑工程学院土木工程学院,河北 张家口 075000
4.河北省寒冷地区交通基础设施工程技术创新中心, 河北 张家口 075000
贺涛(1981—),男,高级工程师。主要从事道路工程方面的研究。E-mail: 35490151@qq.com
刘晶磊(1981—),男,副教授,博士后。主要从事铁路交通振动响应与相应减隔振措施方面的研究。E-mail: kingbest_1118@163.com
纸质出版:2021-10-15
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贺涛,刘晶磊,刘桓等.单排非连续排桩几何参量对减隔振效果的影响[J].防灾减灾工程学报,2021,41(05):1045-1051.
HE Tao,LIU Jinglei,LIU Huan,et al.Influence of Geometric Parameters of Single Row Discontinuous Row Piles on Vibration Reduction and Isolation[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(05):1045-1051.
贺涛,刘晶磊,刘桓等.单排非连续排桩几何参量对减隔振效果的影响[J].防灾减灾工程学报,2021,41(05):1045-1051. DOI: 10.13409/j.cnki.jdpme.201905011.
HE Tao,LIU Jinglei,LIU Huan,et al.Influence of Geometric Parameters of Single Row Discontinuous Row Piles on Vibration Reduction and Isolation[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(05):1045-1051. DOI: 10.13409/j.cnki.jdpme.201905011.
为了研究砂土地基中单排非连续排桩几何参量对减隔振效果的影响,以振动波在岩土介质中的传播特性为理论基础,构造评价隔振效果的无量纲指标
A
RC
(加速度消耗率)和
S
P
(面积增加比),结合地表加速度消耗率等值线图,分析
A
RC
分别为0.2,0.3,0.4,0.5时对应的排桩几何参量与
S
P
之间的关系。结果表明:各
A
RC
条件下,桩后屏蔽区面积均表现为长桩时较大,
S
P
值分布于0%~9%;桩间距对
S
P
的影响表现为小间距时桩后屏蔽区面积较大,
S
P
分布范围在0%~28%;振源距对
S
P
的影响与桩长相反,
S
P
值处于5%~12%;关于布置形式对
S
P
的影响,振源正对桩间中心这一布置形式在桩长和间距变化时对
S
P
的影响较大,而在振源距这一参量变化时,布置形式的差异对
S
P
值的影响不存在明显区别。
In order to study the influence of geometric parameters of single row discontinuous row piles on vibration reduction and isolation, dimensionless indicators
A
RC
(Acceleration consumption rate) and
S
P
(Area increase ratio) that evaluates the vibration isolation effect was constructed based on the propagation characteristics of vibration waves in a geotechnical medium. Combined with the equipotential line diagram of acceleration consumption rate, the relationship between the geometric parameters of corresponding row piles and
S
P
in
A
RC
of 0.2, 0.3, 0.4, and 0.5 is analyzed. The results show that under various
A
RC
conditions, the area of the shielded area behind the pile was large when the pile was long, and
S
P
values were distributed between 0%~9%. The influence of pile spacing on
S
P
was shown as the shielding area behind the pile was large when the pile spacing was small, and the distribution range of
S
P
was 0%~28%. The influence of vibration source distance on
S
P
was opposite to that of the pile length, and the
S
P
value was between 5%~12%. As for the influence of layout pattern on
S
P
, when the vibration source was on the center between piles, the change of pile length and spacing had a great influence on
S
P
. However, when the parameter of vibration source distance changes, the layout pattern had no significant influence on the
S
P
value.
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