夯筑土遗址木锚杆四锚系统锚固机制物理模型试验研究

doi:10.13722/j.cnki.jrme.2019.0611

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1353 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要选择夯筑土遗址木锚杆四锚系统为研究对象，构建尺寸为2 m×2 m×0.5 m室内试验模型，运用自主研发的拉拔试验测试系统，获得四锚锚固系统的荷载位移关系与破坏模式。基于三维有限差分数值模拟方法，分析夯筑土体的位移场与应力场、单根锚杆轴应力以及锚杆–浆体界面的应力分布特征。研究结果表明，荷载位移关系前期处于弹性阶段，后期进入塑性阶段。单根锚杆周围土体的破坏半径约为26 cm，杆间裂纹相互贯通，群锚系统呈现典型的复合锥形破坏。数值模拟结果表明，所选取的四锚对角线L1、边线L2、中线L3三条测线位移分布特征相同，均呈对称的抛物线分布。四锚锚固系统的受力区集中在试样中部土层。随着荷载增加，锚杆–浆体界面的剪应力向锚杆末端转移，上部界面脱黏破坏。受到夯筑工艺影响，夯筑土遗址群锚破坏模式可能会沿着土层分离。研究结果对夯筑土遗址木锚杆群锚锚固系统设计具有较高的参考价值。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	李金峰1
	2
	张景科1
	2
	王南1
	2
	赵林毅3
	郭青林3

关键词 ：土力学, 夯筑土遗址, 四锚系统, 群锚效应, 模型试验, 数值模拟

Abstract：A model test of a four-anchor system applied in the earthen site with a size of 2 m×2 m×0.5 m was carried out through a self-developed pull-out system，and the failure mode and load-displacement relationship were studied. Based on the three-dimensional finite difference method，the displacement and stress fields of rammed soil，the axial stress of a single bolt and the stress distribution of the anchor-slurry interface were analyzed. The results show that the load-displacement curve shows elastic first and then plastic. The crack radius of the soil around an anchor is about 26 cm，and the cracks among anchors are connected with each other. The failure mode of the four-anchor anchorage system is a typical composite cone failure. The numerical simulation test reveals that the load-displacement distributions of the three selected measuring lines of the four anchor system including diagonal L1，sideline L2 and center line L3 are all symmetric parabola. The stress area of the four-anchor anchorage system is concentrated in the middle soil layer of the sample. With increasing the load，the shear stress of the bolt- slurry interface will transfer from the top to the bottom of the bolt，and the upper interface will debond. Under the influence of the ramming construction technology，the anchor group may separate along the soil layer. The research results have high reference value for the design of the anchor group system with wood bolts in earthen sites.

Key words： soil mechanics rammed earthen sites anchor system with four bolts effect of anchor group model test numerical simulation

引用本文:

李金峰1，2，张景科1，2，王南1，2，赵林毅3，郭青林3. 夯筑土遗址木锚杆四锚系统锚固机制物理模型试验研究[J]. 岩石力学与工程学报, 2019, 38(11): 2321-2331.
LI Jinfeng1，2，ZHANG Jingke1，2，WANG Nan1，2，ZHAO Linyi3，GUO Qinglin3. Physical model test on working mechanisms of an anchor group system with four wood bolts in rammed earthen sites#br#. , 2019, 38(11): 2321-2331.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2019.0611 或 http://www.rockmech.org/CN/Y2019/V38/I11/2321

[15]	LYNCH T J，BURDETTE E G. Some design considerations for anchors in concrete[J]. Aci Structural Journal，1991，88(1)：91-97.
[2]	孙满利，李最雄，王旭东，等. 南竹加筋复合锚杆加固土遗址研究[J]. 岩石力学与工程学报，2008，27(增2)：3 381-3 385.(SUN Manli，LI Zuixiong，WANG Xudong，et al. Study on reinforcement of earthen sites by bamboo-steel composite anchor[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(Supp.2)：3 381-3 385.(in Chinese))
[4]	周环，张秉坚，陈港泉，等. 潮湿环境下古代土遗址的原位保护加固研究[J]. 岩土力学，2008，29(4)：954-962.(ZHOU Huan，ZHANG Bingjian，CHEN Gangquan，et al. Study on consolidation and conservation of historical earthen sites in moisture circumstances conservation of Tangshan Site in situ[J]. Rock and Soil Mechanics，2008，29(4)：954-962.(in Chinese))
[5]	ZHANG J K，CHEN P F，CHEN W W，et al. Anchor performance of wood bolt fully grouted by natural hydraulic lime and quartz sand slurry[J]. Journal of Civil，Architectural and Environmental Engineering，2015，37(3)：86-93.
[6]	芦苇. 干旱地区夯土遗址锚杆加固锚固机理研究[博士学位论文][D]. 西安：西安建筑科技大学，2017.(LU Wei. Research on anchoring mechanism of reinforced rammed earthen site in arid regions[Ph. D. Thesis][D]. Xi?an：Xi?an University of Architecture and Technology，2017.(in Chinese))
[8]	崔凯，冯飞，谌文武，等. 生石灰为掺料的土遗址裂隙注浆浆液结石体力学兼容性研究[J]. 岩土力学，2019，DOI：10.16285/ j.rsm.2018.1996.(CUI Kai，FENG Fei，CHEN Wenwu，et al. Researches on the fissure of grouting slurry mixed with quick lime and the optimization of grouting technology in earthen sites[J]. Rock and Soil Mechanics，2019，DOI：10.16285/ j.rsm.2018.1996.(in Chinese))
[9]	和法国，吕燃，粟华忠，等. SH材料加固夯筑遗址土耐久性试验及机理研究[J]. 岩土力学，2019，40(增1)：1-12.(HE Faguo，LV Ran，SU Huazhong，et al. Durability test and reinforced mechanism on adding SH materials into soil of archaeological sites[J]. Rock and Soil Mechanics，2019，40(Supp.1)：1-12.(in Chinese))
[7]	石玉成，秋仁东. 木质锚杆加固土遗址边坡的稳定性分析[J]. 地震工程学报，2015，37(3)：809-815.(SHI Yucheng，QIU Rendong. Stability analysis of earthen slope sites reinforced with wood anchors[J]. China Earthquake Engineering Journal，2015，37(3)：809-815.(in Chinese))
[17]	ZHANG Y G，KLINGNER R E，GRAVES H L. Seismic response of multiple-anchor connections to concrete[J]. Aci Structural Journal，2001，98(6)：811-822.
[27]	中华人民共和国行业标准编写组. WW/T 0038干燥类土遗址保护加固工程设计规范[S]. 北京：文物出版社，2012.(The Professional Standards Compilation Group of People?s Republic of China. WW/T 0038 Design specification for preservation and reinforcement engineering of arid earthen sites[S]. Beijing：Cultural Relics Press，2012.(in Chinese))
[12]	李最雄，赵林毅，孙满利. 中国丝绸之路土遗址的病害及PS加固[J]. 岩石力学与工程学报，2009，28(5)：1 047-1 054.(LI Zuixiong，ZHAO Linyi，SUN Manli. Deterioration of earthen sites and consolidation with PS material along silk road of China[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(5)：1 047- 1 054.(in Chinese))
[14]	ZHANG J K，CHEN W W，LI Z X，et al. Study on workability and durability of calcined ginger nuts-based grouts used in anchoring conservation of earthen sites[J]. Journal of Cultural Heritage，2015，16(6)：6-12.
[16]	BENFARROW C，KLINGNER R E. Tensile capacity of anchors with partial or overlapping failure surfaces：Evaluation of existing formulas on an LRFD basis[J]. Aci Structural Journal，1995，92(6)：698-710.
[19]	许明，唐树名，李强，等. 单锚及群锚失效对边坡稳定性影响的模型试验研究[J]. 岩石力学与工程学报，2007，26(增1)：2 755- 2 760.(XU Ming，TANG Shuming，LI Qiang，et al. Laboratory model test on investigation of effect of invalidation of single and group anchor cable on slope stability[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.1)：2 755-2 760.(in Chinese))
[22]	李英勇，张顶立，张宏博，等. 边坡加固中预应力锚索失效机制与失效效应研究[J]. 岩土力学，2010，31(1)：144-150.(LI Yingyong，ZHANG Dingli，ZHANG Hongbo，et al. Research on failure mechanism and effects of prestressed anchor cables of reinforcing slopes[J]. Rock and Soil Mechanics，2010，31(1)：144-150.(in Chinese))
[24]	张景科，王南，樊孟，等. 烧料礓石改性遗址土裂隙注浆材料龄期性能试验研究[J]. 岩石力学与工程学报，2018，37(1)：220-229.(ZHANG Jingke，WANG Nan，FAN Meng，et al. Experimental study on age properties of fissure grouting material composed of calcined ginger nuts and earthen site soil[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(1)：220-229.(in Chinese))
[25]	张景科，郭青林，李最雄，等. 土遗址锚固机理初探[M]. 兰州：兰州大学出版社，2014：64-65.(ZHANG Jingke，GUO Qinglin，LI Zuixiong，et al. Preliminary study on anchoring mechanism of earthen sites[M]. Lanzhou：Lanzhou University Press，2014：64-65.(in Chinese))
[26]	中华人民共和国国家标准编写组. GB/T 50123—1999 土工试验方法标准[S]. 北京：中国计划出版社，1999.(The National Standards Compilation Group of People?s Republic of China. GB/T 50123—1999 Standard for soil test method[S]. Beijing：China Planning Press，1999.(in Chinese))
[29]	蒋铁柱，徐福泉，吴林志. 锚栓群锚抗拉性能试验研究[J]. 工程抗震与加固改造，2013，35(5)：108-114.(JIANG Tiezhu，XU Fuquan，WU Linzhi. Experimental study on tension performance of anchor group[J]. Earthequake Resistant Engineering and Retrofitting，2013，35(5)：108-114.(in Chinese))
[32]	崔凯，王东华，谌文武，等. 基于改性糯米灰浆的3种锚杆锚固性能对比研究[J]. 岩土力学，2018，39(2)：498-506.(CUI Kai，WANG Donghua，CHEN Wenwu，et al. Comparative study of anchorage performance of three types of bolts fully grouted by modified glutinous rice mortar[J]. Rock and Soil Mechanics，2018，39(2)：498-506.(in Chinese))
[3]	赵海英，李最雄，汪稔，等. PS材料加固土遗址风蚀试验研究[J]. 岩土力学，2008，29(2)：392-396.(ZHAO Haiying，LI Zuixiong，WANG Ren，et al. Wind erosion experiment of ancient earthen site consolidated by PS material[J]. Rock and Soil Mechanics，2008，29(2)：392-396.(in Chinese))
[13]	孙满利，王旭东，李最雄，等. 木质锚杆加固生土遗址研究[J]. 岩土工程学报，2006，28(12)：2 156-2 159.(SUN Manli，WANG Xudong，LI Zuixiong，et al. Study on immature earthen sites reinforced with wood anchor[J]. Chinese Journal of Geotechnical Engineering，2006，28(12)：2 156-2 159.(in Chinese))
[23]	丁秀丽，盛谦，韩军，等. 预应力锚索锚固机理的数值模拟试验研究[J]. 岩石力学与工程学报，2002，21(7)：980-988.(DING Xiuli，SHENG Qian，HAN Jun，et al. Numerical simulation testing study on reinforcement mechanism of prestressed anchorage cable[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(7)：980-988.(in Chinese))
[33]	郝冬雪，符胜男，陈榕，等. 砂土中锚板拉拔模型试验及其抗拔力计算[J]. 岩土工程学报，2015，37(11)：2 101-2 106.(HAO Dongxue，FU Shengnan，CHEN Rong，et al. Experimental investigation of uplift behavior of anchors and estimation of uplift capacity in sands[J]. Chinese Journal of Geotechnical Engineering，2015，37(11)：2 101-2 106.(in Chinese))
[1]	吴文，徐松林，周劲松，等. 深基坑桩锚支护结构受力和变形特性研究[J]. 岩石力学与工程学报，2001，20(3)：399-402.(WU Wen，XU Songlin，ZHOU Jinsong，et al. Studies of force and deformation properties considering pile-anchor-soil interaction in deep pits[J]. Chinese Journal of Rock Mechanics and Engineering，2001，20(3)：399-402.(in Chinese))
[11]	崔凯，王东华，谌文武，等. 基于改性糯米灰浆的3种锚杆锚固性能对比研究[J]. 岩土力学，2018，39(2)：498-506.(CUI Kai，WANG Donghua，CHEN Wenwu，et al. Comparative study of anchorage performance of three types of bolts fully grouted by modified glutinous rice mortar[J]. Rock and Soil Mechanics，2018，39(2)：498-506.(in Chinese))
[21]	孙赤，刘展，黄润秋. 大型工程高边坡群锚效应的数值研究[J]. 工程科学与技术，2012，44(增1)：110-114.(SUN Chi，LIU Zhan，HUANG Runqiu. Numerical analysis of multi-anchorage effect on large high slope[J]. Advanced Engineering Sciences，2012，44(Supp.1)：110-114.(in Chinese))
[31]	张景科，谌文武，李最雄，等. 土遗址加固中木锚杆锚固机理的现场试验研究[J]. 岩土工程学报，2013，35(6)：1 166-1 171.(ZHANG Jingke，CHEN Wenwu，LI Zuixiong，et al. Field tests on anchorage mechanism of wood bolts for conservation of earthen sites[J]. Chinese Journal of Geotechnical Engineering，2013，35(6)：1 166-1 171.(in Chinese))
[10]	任克彬，王博，李新明，等. 毛细水干湿循环作用下土遗址的强度特性与孔隙分布特征[J]. 岩土力学，2019，40(3)：962-970.(REN Kebin，WANG Bo，LI Xinming，et al. Strength properties and pore-size distribution of earthen archaeological site under dry-wet cycles of capillary water[J]. Rock and Soil Mechanics，2019，40(3)：962-970.(in Chinese))
[20]	李宁，陈飞熊，赵彦辉. 预应力群锚加固机理数值试验研究[J].岩土工程学报，1997，19(5)：62-68.(LI Ning，CHEN Feixiong，ZHAO Yanhui. Numerical model test on strengthening mechanism of prestressed bolts[J]. Chinese Journal of Geotechnical Engineering，1997，19(5)：62-68.(in Chinese))
[30]	周萌. 混凝土结构化学锚栓群锚抗拉性能研究[硕士学位论文][D]. 武汉：华中科技大学，2012.(ZHOU Meng. Study on tensile properties of bonded-mental-anchor group for post-installed fastenings in concrete structures[M. S. Thesis][D]. Wuhan：Huazhong University of Science and Technology，2012.(in Chinese))
[18]	唐树名，曾祥勇，邓安福. 预应力锚索群锚锚固边坡均质岩体的室内模型试验研究[J]. 中国公路学报，2004，17(3)：23-27.(TANG Shuming，ZENG Xiangyong，DENG Anfu. Laboratory model test investigation of prestressed anchor cable group strengthened slope intact rock[J]. China Journal of Highway and Transport，2004，17(3)：23-27.(in Chinese))
[28]	王南，张景科，黄军朋，等. 土遗址用GFRP锚杆双锚固模型试验与模拟分析[C]// 陆新征编. 第26届全国结构工程学术会议论文集(第Ⅲ册). 长沙：工程力学杂志社，2017：4.(WANG Nan，ZHANG Jingke，HUANG Junpeng，et al. Experimental and numerical study on double-anchoring model of GFRP bolt in earthen sites[C]// LU Xinzheng ed. Proceedings of the 26th National Conference on Structural Engineering(Volume 3). Changsha：Engineering Mechanics Press，2017：4.(in Chinese))