基于加速度响应的微型桩加固土质边坡效果评价

doi:10.13722/j.cnki.jrme.2019.0171

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摘要为研究地震作用下微型桩加固土质边坡的作用效果，通过大型振动台试验，获得微型桩加固有软弱面的土质坡体桩间土的加速度响应数据，并对试验现象进行串联分析；重点对比在不同地震波加载方向下，桩群不同位置加速度响应的差异，用小波包对采集加速度时域曲线进行分解，分析其频谱特征，并与无软弱结构面的坡体加速度响应一般规律进行对比分析，以此对微型桩支护效果进行定性评价。结果表明：(1) 在微型桩加固坡体后，会产生多种释放动能的途径，以保证整个坡体的稳定性。(2) 经微型桩加固的测点趋向于无软弱面的均质材料所得到的加速度放大的一般规律，而未加固的山侧测点在滑面上下会产生“加速度错台”现象，表现出未经支护的自然滑坡体的破坏特征。(3) 水平向加载时，低频为影响加速度响应的主导频率，而竖直向加载时，除中频段响应小，其余频段均有明显作用。(4) 在后排桩河侧滑带上下，高频滤波作用明显，而后排桩山侧频率变化不明显。微型桩加固边坡对整体结构性的提升和边坡的稳定作用显著。

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	王飞1
	吴红刚2
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	郭春香1
	武志信1
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关键词 ：边坡工程, 土质边坡, 大型振动台试验, 微型桩, 小波包, 加速度响应, 支护效果

Abstract：In order to study the effect of micro-pile reinforcement in soil slope under the effect of earthquake action，the acceleration response data of inter-pile soil in soil slope with weak structural surface strengthened by micro-pile is obtained through large-scale shaking table test，and the experimental phenomena are analyzed in series. In the different seismic wave loading directions，analyze the different acceleration response of the pile group at different positions，the acceleration time-history curve is decomposed by the wavelet packet，the spectrum characteristics are analyzed，and compared with the general law of the slope acceleration response of soil slope without the weak structural plane，in this way，the micro-pile support effect is qualitatively evaluated. The results show that：(1) In the micro-pile reinforced slope，a variety of ways to release kinetic energy will be generated to ensure the stability of the entire slope. (2) The acceleration response of measurement point in the micro-pile reinforced slope tends to the general law of acceleration amplification obtained by the homogeneous material without the weak surface，while the unreinforced mountain side measurement point will produce the phenomenon of “acceleration staggered platform” under the sliding surface. Destructive characteristics of unsupported natural landslide bodies. (3) When horizontal loading，the low frequency is the dominant frequency that affects the acceleration response，while in the vertical direction，except for the mid-range response，the other frequency bands have obvious effects. (4) Around the slip zone of the river side of the rear row piles，the high-frequency filtering effect is obvious，while this effect of the mountain side of the rear piled is not obvious. The micro-pile reinforced slope has a significant effect on the overall structural improvement and the stability of the slope.

Key words： slope engineering soil slope large-scale shaking table test micropile wavelet packet acceleration response supporting effect

引用本文:

王飞1，吴红刚2，3，4，郭春香1，武志信1，3. 基于加速度响应的微型桩加固土质边坡效果评价[J]. 岩石力学与工程学报, 2019, 38(S2): 3812-3821.
WANG Fei1，WU Honggang2，3，4，GUO Chunxiang1，WU Zhixin1，3. Evaluation of soil slope reinforced by micro-piles based on acceleration response. , 2019, 38(S2): 3812-3821.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2019.0171 或 http://rockmech.whrsm.ac.cn/CN/Y2019/V38/IS2/3812

[9]	NOORZAD R，SAGHAEE G R. Seismic analysis of inclined micropiles using numerical method[C]// Contemporary Topics in Deep Foundations. [S. l.]：[S. n.]，2009：406–413.
[5]	ESMAEILI M，NIK M G，KHAYYER F. Experimental and numerical study of micropiles to reinforce high railway embankments[J]. International Journal of Geomechanics，2012，13(6)：729–744.
[7]	杨静. 微型桩加固边坡的动力响应特征及抗震计算方法研究[硕士学位论文][D]. 成都：西南交通大学，2012.(YANG Jing. Study on dynamic response characteristics of reinforced slope with micropiles and the aseismic analysis method[M. S. Thesis][D]. Chengdu：Southwest Jiaotong University，2012.(in Chinese))
[6]	郑静，牛文庆，吴红刚，等. 微型桩大型振动台试验-坡体及桩动力特性研究[J]. 铁道工程学报，2017，34(9)：22–28.(ZHENG Jing，NIU Wenqing，WU Honggang，et al. Research on the characteristics of large-scale shaking table experiment slope and dynamy of micropiles[J]. Journal of Railway Engineering Society，2017，34(9)：22–28.(in Chinese))
[16]	郑颖人，叶海林，黄润秋. 地震边坡破坏机制及其破裂面的分析探讨[J]. 岩石力学与工程学报，2009，28(8)：1 714–1 723.(ZHENG Yingren，YE Hailin，HUANG Runqiu. Analysis and discussion of failure mechanism and fracture surface of slope under earthquake[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(8)：1 714–1 723.(in Chinese))
[1]	BRUCE D A，DIMILLIO A F，JURAN I. Introduction to micropiles：an international perspective[C]// Foundation Upgrading and Repair for Infrastructure Improvement. New York：Geotechnical Special Publication，ASCE，1995：1–26.
[8]	王栋. 微型桩抗滑结构地震反应分析[硕士学位论文][D]. 成都：西南交通大学，2014.(WANG Dong. Reasearch on micropiles toearthquake load[M. S. Thesis][D]. Chengdu：Southwest Jiaotong University，2014.(in Chinese))
[10]	牛文庆. 微型桩支挡结构地震动力特性试验研究[硕士学位论文][D]. 北京：中国铁道科学研究院，2016.(NIU Wenqing. Research on earthquake dynamic experimental of micropiles supporting structures[M. S. Thesis][D]. Beijing：China Academy Of Railway Sciences，2016.(in Chinese))
[12]	庄一舟，王静杰，陈云，等. 微型桩动力p-y曲线影响因素参数分析[J]. 地震工程与工程振动，2018，38(4)：29–33.(ZHUANG Yizhou，WANG Jingjie，CHEN Yun，et al. Parameter analysis of influence factors of micro-pile dynamic p-y curve[J]. Earthquake Engineering and Engineering Vibration，2018，38(4)：29–33.(in Chinese))
[15]	黄润秋. 汶川8.0级地震触发崩滑灾害机制及其地质力学模式[J]. 岩石力学与工程学报，2009，28(6)：1 239–1 249.(HUANG Runqiu. Mechanism and geomechanical modes of landslide hazards triggered by Wenchuan 8.0 earthquake[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(6)：1 239–1 249.(in Chinese))
[2]	王洋，冯君，谢先当，等. 微型桩组合抗滑结构受力机制的现场试验研究[J]. 岩土力学，2018，39(11)：4 226–4 231.(WANG Yang，FENG Jun，XIE Xiandang，et al. In-situ experimental study of anti-siding mechanism of micro-pile combined structure[J]. Rock and Soil Mechanics，2018，39(11)：4 226–4 231.(in Chinese))
[3]	朱宝龙，胡厚田，张玉芳，等. 钢管压力注浆型抗滑挡墙在京珠高速公路K108滑坡治理中的应用[J]. 岩石力学与工程学报，2006，25(2)：399–406.(ZHU Baolong，HU Houtian，ZHANG Yufang，et al. Application of steel-tube bored grouting anti-sliding retaining wall to treatment of landslide K108 in Beijing——Zhuhai expressway[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(2)：399–406.(in Chinese))
[4]	HOWE W K. Micropiles for slope stabilization[C]// GeoTrends：The Progress of Geological and Geotechnical Engineering in Colorado at the Cusp of a New Decade. [S. l. ]：ASCE，2011：78–90.
[14]	许强，黄润秋. 5.12汶川大地震诱发大型崩滑灾害动力特征初探[J]. 工程地质学报，2008，16(6)：721–729.(XU Qiang，HUANG Runqiu. Kinetics charateristics of large landlides triggered by may 12th Wenchuan earthquake[J]. Journal of Engineering Geology，2008，16(6)：721–729.(in Chinese))
[11]	李楠，门玉明，高讴，等. 微型桩群桩支护滑坡的地震动力响应研究[J]. 岩石力学与工程学报，2018，37(9)：157–164.(LI Nan，MEN Yuming，GAO Wei，et al. Seismic behavior of the landslide supported by micropiles[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(9)：157–164.(in Chinese))
[13]	艾挥，吴红刚，冯文强，等. 冠梁约束型抗滑桩与普通抗滑桩的抗震性能对比试验研究[J]. 防灾减灾工程学报，2017，37(2)：194–200.(AI Hui，WU Honggang，FENG Wenqiang，et al. Research on seismic capacity correlative experiment of top beam bingding anti- slide pile and conmon anti-slide pile[J]. Journal of Disaster Prevention and Mitigation Engineering，2017，37(2)：194–200.(in Chinese))
[19]	MALLAT S G. A theory for multidimension signal decomposition：the wavelet models[J]. IEEE Transactions on Pattern Analysis and Machine Intelligence，1989，(11)：674–693.
[17]	叶海林，郑颖人，杜修力，等. 边坡动力破坏特征的振动台模型试验与数值分析[J]. 土木工程学报，2012，45(9)：128–135.(YE Hailin，ZHENG Yingren，DU Xiuli，et al. Shaking table model test and numerical analysis on dynamic failure characteristics of slope[J]. China Civil Engineering Journal，2012，45(9)：128–135.(in Chinese))
[18]	杜剑，毛毳，林贝贝. 地震波信号的小波包分解及能量分布特征[J]. 天津城建大学学报，2017，23(3)：183–187.(DU Jian，MAO Wei，LIN Beibei. Wavelet packet decomposition and energy distribution analysis of seismic wave signal[J]. Journal of Tianjin Urban Construction University，2017，23(3)：183–187.(in Chinese))
[20]	张德丰. 详解MATLAB数字信号处理[M]. 北京：电子工业出版社，2010：39–44.(ZHANG Defeng. Detailed MATLAB digital signal processing[M]. Beijing：Mechanical Industry Press，2010：39–44.(in Chinese))