硅压阻式压力传感器在桩土接触面受力测试的探究
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摘要
近些年,随着众多学者对桩土相互作用的研究和认识逐渐深入,关于桩土接触面的受力特性的研究成为热点。但在预制桩贯入过程、休止期及静载荷试验中桩土界面受力状态如何能够被准确测试一直是研究的难点。硅压阻式压力传感器是一种智能化测试元件,并且因其优良的测试特性而被应用于土与混凝土结构物的接触问题中。本文通过详细阐述硅压阻式压力传感器的结构组成、测试原理以及其在试验中的应用和试验结果的分析,论证了其被应用于预制桩贯入过程、休止期及静载荷试验中判断测试桩桩土界面力学机制的可行性,并为硅压阻式压力传感器测试技术应用于岩土工程其他相关领域开辟了一条新路径。
In recent years,the research on the mechanism characteristics of the pile-soil surface gets more attention with the scholar's further study on the pile-soil interaction. However,it's difficult to accurately measure the pile-soil interface stress of prefabricated pile in the process of the penetration,the rest period and the static loading test. The silicon piezo-resistive pressure sensor is an intelligent test element and be widely used in concrete structure contact for excellent testing performance. The feasibility of the silicon piezo-resistive pressure sensors used for the pile-soil interface measurement during the process of the penetration,the rest period and the static loading test is discussed through explaining the structure,testing principle and test application of the sensors,which opens up a new way for the application of the sensors in the related fields of geotechnical engineering.
In recent years,the research on the mechanism characteristics of the pile-soil surface gets more attention with the scholar's further study on the pile-soil interaction. However,it's difficult to accurately measure the pile-soil interface stress of prefabricated pile in the process of the penetration,the rest period and the static loading test. The silicon piezo-resistive pressure sensor is an intelligent test element and be widely used in concrete structure contact for excellent testing performance. The feasibility of the silicon piezo-resistive pressure sensors used for the pile-soil interface measurement during the process of the penetration,the rest period and the static loading test is discussed through explaining the structure,testing principle and test application of the sensors,which opens up a new way for the application of the sensors in the related fields of geotechnical engineering.
引文
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[14]魏广庆,施斌,余小奎等.BOTDR分布式检测技术在复杂地层钻孔灌注桩测试[J].工程地质学报,2008,16(6):826~832.Wei Guanagqing,Shi Bin,Yu Xiaokui et al.BOTDR based distributed strain test on bored pile buried in complicated geological ground[J].Journal of Engineering Geology,2008,16(6):826~832.(in Chinese)
[15]殷宗泽,朱泓,徐国华.土与结构材料接触面的变形及其数学模拟[J].岩土工程学报,1994,16(3):14~22.Yin Zongze,Zhu Hong,Xu Guohua.Deformation and mathematical simulation of contact surface of soil and structural materials[J].Chinese Journal of Geotechnical Engineering,1994,16(3):14~22.(in Chinese)
[16]Desai C S,Rigby D B.Cyclic interface and joint shear device including pore pressure effects[J].Journal of Geotechnical and Geoenvironmental Engineering,1997,123,(6):568~579.
[17]张嘎,张建民.循环荷载作用下粗粒土与结构接触面变形特性试验研究[J].岩土工程学报,2004,26(2):254~258.Zhang Ga,Zhang Jianmin.Experimental study on cyclic behavior of interface between soil and structure[J].Chinese Journal of Geotechnical Engineering,2004,26(2):254~258.(in Chinese)
[18]李登华,郦能惠.土与混凝土结构接触面力学特性试验研究[J].水电能源科学,2009,27(5):114~118.Li Denghua,Li Nenghui.Experimental study on mechanical properties of contact surface of soil and concrete structure[J].Water Resources and Power,2009,27(5):114~118.(in Chinese)
[19]张忠苗,谢志专,刘俊伟等.淤质与粉质互层中管桩沉桩过程的土压力[J].浙江大学学报(工学版),2011,45(8):1430~1434.Zhang Zhongmiao,Xie Zhizhuan,Liu Junwei et al.The earth pressure during pile driving in silty soil with mucky soil interbed[J].Journal of Zhejiang University(Engineering Science),2011,45(8):1430~1434.(in Chinese)
[20]石熊,张家生,刘蓓等.红黏土与混凝土接触面剪切特性试验研究[J].中南大学学报(自然科学学版),2015,46(5):1826~1831.Shi Xiong,Zhang Jiasheng,Liu Bei et al.Experimental research on shearing properties of interface between red clay and concrete[J].Journal of Central South University(Science and Technology),2015,46(5):1826~1831.(in Chinese)
[21]陈俊桦,张家生,李键等.接触面粗糙度对红黏土—混凝土接触面力学特性的影响[J].中南大学学报(自然科学版),2016,47(5):1682~1688.Chen Junhua,Zhang Jiasheng,Li Jian et al.Influence of interface roughness on mechanical properties of red clay-concrete interface[J].Journal of Central South University(Science and Technology),2016,47(5):1682~1688.(in Chinese)
[22]唐世栋,何连生,傅纵.软土地基中单桩施工引起的超孔隙水压力[J].岩土力学,2002,23(6):725~732.Tang Shidong,He Liansheng,Fu Zong.Excess pore water pressure caused by an installing pile in soft foundation[J].Rock and Soil Mechanics,2002,23(6):725~732.(in Chinese)
[23]朱向荣,何耀辉,徐崇锋等.饱和软土单桩沉桩超孔隙水压力分析[J].岩石力学与工程学报,2005,24(S2):5740~5744.Zhu Xiangrong,He Yaohui,Xu Chongfeng et al.Excess pore water pressure caused by single pile driving in saturated soft soil[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(S2):5740~5744.(in Chinese)
[2]张忠苗,喻君,张广兴等.PHC管桩和预制方桩受力性状试验对比分析[J].岩土力学,2008,29(11):95~99.Zhang Zhongmiao,Yu Jun,Zhang Guangxing et al.Contrastive experimental analysis of bearing behaviors of PHC pile and precast square piles[J].Rock and Soil Mechanics,2008,29(11):95~99.(in Chinese)
[3]周建,邓益兵,叶建忠等.砂土中静压桩沉桩过程试验研究与颗粒流模拟[J].岩土工程学报,2009,31(4):501~507.Zhou Jian,Deng Yibing,Ye Jianzhong et al.Experimental and numerical analysis of jacked piles during installation in sand[J].Chinese Journal of Geotechnical Engineering,2009,31(4):501~507.(in Chinese)
[4]Banerjee P K,Davis T G,Fathallah R C.Behavior of anxially loaded driven piles(Chapter 7).in:Development in soil mechanics and foundation engineering[M].New York:Elsevier Science Publishing Co.,Inc.,1982.
[5]Altaee A,Fellenius B H,Evgin E.Load transfer for piles in sand and the critical depth[J].Canadian Geotechnical Journal,1993,30:455~463.
[6]Boloton M D,Gui M W,Garner J et al.Centrifuge cone penetration tests in sand[J].Geotechnique,1999,49(4):543~552.
[7]胡立峰,龚维明,过超等.静压桩沉桩机制及承载力试验[J].解放军理工大学学报(自然科学学版),2009,10(6):610~614.Hu Lifeng,Gong Weiming,Guo Chao et al.Experimental research on piling mechanism and bearing capacity of jacked pile[J].Journal of PLA University of Science and Technology(Natural Science Edition),2009,10(6):610~614.(in Chinese)
[8]Broms B B,Hellman L.End bearing and skin friction resistance of piles[J].Journal of the Soil Mechanics and Foundtions Division,ASCE,1968,94(SM2):421~429.
[9]张明义,邓安福.预制桩静力贯入层状地基的试验研究[J].岩土工程学报,2000,22(4):490~492.Zhang Mingyi,Deng Anfu.Experimental study on jacked precast piles in layered soil[J].Chinese Journal of Geotechnical Engineering,2000,22(4):490~492.(in Chinese)
[10]陈福全,简洪钰,许万强等.小截面静压预制桩的现场试验及其应用研究[J].岩土力学,2002,23(2):213~216.Chen Fuquan,Jian Hongyu,Xu Wanqiang et al.An in situ and analysis of static pressed precast piles with small section[J].Rock and Soil Mechanics,2002,23(2):213~216.(in Chinese)
[11]冷伍明,律文田,谢维鎏等.基桩现场静动载试验技术研究[J].岩土工程学报,2004,26(5):619~622.Leng Wuming,Lu Wentian,Xie Weiliu et al.Study on static and dynamic load test of pile in situ[J].Chinese Journal of Geotechnical Engineering,2004,26(5):619~622.(in Chinese)
[12]白晓宇,张明义,寇海磊等.基于BP神经网络的静压桩承载力时间效应预测[J].工程勘察,2014,42(4):7~11.Bai Xiaoyu,Zhang Mingyi,Kou Hailei et al.Prediction of time effect of static pile bearing capacity by BP neural network[J].Geotechnical Investigation&Surveying,2014,42(4):7~11.(in Chinese)
[13]王晓阳,戴国亮,唐佳男等.桥梁支盘桩基础内力检测分析[J].工程勘察,2017,45(1):16~22.Wang Xiaoyang,Dai Guoliang,Tang Jianan et al.Monitoring analysis of internal force of squeezed branch pile as bridge foundation[J].Geotechnical Investigation&Surveying,2017,45(1):16~22.(in Chinese)
[14]魏广庆,施斌,余小奎等.BOTDR分布式检测技术在复杂地层钻孔灌注桩测试[J].工程地质学报,2008,16(6):826~832.Wei Guanagqing,Shi Bin,Yu Xiaokui et al.BOTDR based distributed strain test on bored pile buried in complicated geological ground[J].Journal of Engineering Geology,2008,16(6):826~832.(in Chinese)
[15]殷宗泽,朱泓,徐国华.土与结构材料接触面的变形及其数学模拟[J].岩土工程学报,1994,16(3):14~22.Yin Zongze,Zhu Hong,Xu Guohua.Deformation and mathematical simulation of contact surface of soil and structural materials[J].Chinese Journal of Geotechnical Engineering,1994,16(3):14~22.(in Chinese)
[16]Desai C S,Rigby D B.Cyclic interface and joint shear device including pore pressure effects[J].Journal of Geotechnical and Geoenvironmental Engineering,1997,123,(6):568~579.
[17]张嘎,张建民.循环荷载作用下粗粒土与结构接触面变形特性试验研究[J].岩土工程学报,2004,26(2):254~258.Zhang Ga,Zhang Jianmin.Experimental study on cyclic behavior of interface between soil and structure[J].Chinese Journal of Geotechnical Engineering,2004,26(2):254~258.(in Chinese)
[18]李登华,郦能惠.土与混凝土结构接触面力学特性试验研究[J].水电能源科学,2009,27(5):114~118.Li Denghua,Li Nenghui.Experimental study on mechanical properties of contact surface of soil and concrete structure[J].Water Resources and Power,2009,27(5):114~118.(in Chinese)
[19]张忠苗,谢志专,刘俊伟等.淤质与粉质互层中管桩沉桩过程的土压力[J].浙江大学学报(工学版),2011,45(8):1430~1434.Zhang Zhongmiao,Xie Zhizhuan,Liu Junwei et al.The earth pressure during pile driving in silty soil with mucky soil interbed[J].Journal of Zhejiang University(Engineering Science),2011,45(8):1430~1434.(in Chinese)
[20]石熊,张家生,刘蓓等.红黏土与混凝土接触面剪切特性试验研究[J].中南大学学报(自然科学学版),2015,46(5):1826~1831.Shi Xiong,Zhang Jiasheng,Liu Bei et al.Experimental research on shearing properties of interface between red clay and concrete[J].Journal of Central South University(Science and Technology),2015,46(5):1826~1831.(in Chinese)
[21]陈俊桦,张家生,李键等.接触面粗糙度对红黏土—混凝土接触面力学特性的影响[J].中南大学学报(自然科学版),2016,47(5):1682~1688.Chen Junhua,Zhang Jiasheng,Li Jian et al.Influence of interface roughness on mechanical properties of red clay-concrete interface[J].Journal of Central South University(Science and Technology),2016,47(5):1682~1688.(in Chinese)
[22]唐世栋,何连生,傅纵.软土地基中单桩施工引起的超孔隙水压力[J].岩土力学,2002,23(6):725~732.Tang Shidong,He Liansheng,Fu Zong.Excess pore water pressure caused by an installing pile in soft foundation[J].Rock and Soil Mechanics,2002,23(6):725~732.(in Chinese)
[23]朱向荣,何耀辉,徐崇锋等.饱和软土单桩沉桩超孔隙水压力分析[J].岩石力学与工程学报,2005,24(S2):5740~5744.Zhu Xiangrong,He Yaohui,Xu Chongfeng et al.Excess pore water pressure caused by single pile driving in saturated soft soil[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(S2):5740~5744.(in Chinese)