|Table of Contents|

Analysis of load-bearing characteristics of new composite foundation with micro steel pipe pile and anchor(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2024年06期
Page:
152-161
Research Field:
岩土工程
Publishing date:

Info

Title:
Analysis of load-bearing characteristics of new composite foundation with micro steel pipe pile and anchor
Author(s):
WANG Xinping1;  WANG Ruicheng1;  NIE Shaofeng2;  MENG Chunling1;  ZHANG Qingzheng3
(1. China Energy Engineering Group Shanxi Electric Power Engineering Co., Ltd., Taiyuan 030001, Shanxi, China; 2. School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China; 3. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China)
Keywords:
transmission line foundation;  micro steel pipe pile;  anchor foundation;  rock mass;  complex load
PACS:
TU473
DOI:
10.19815/j.jace.2023.05104
Abstract:
In order to solve the problems of large material consumption, prominent construction safety problems, poor environmental and water protection benefits, long construction period and inconvenient transportation of traditional anchor foundation of transmission lines, a prefabricated transmission line steel group anchor foundation was proposed, including steel structure and new composite foundation with micro steel pipe pile and anchor. The three-dimensional refined numerical model of a single micro steel pipe pile and anchor combination foundation was established using finite element method, the changes in stress and displacement fields of composite foundation anchor bar, grout, steel pipe and surrounding rock under various load conditions were studied. The calculation results were compared with those of common anchor foundation. The influence of factors such as steel pipe size and rock strength on the bearing performance of the new composite foundation were analyzed. The quantitative relationship between the horizontal displacement of the new composite foundation and the strength of the rock mass was discussed. The steel pipe, concrete inside the steel pipe, and anchor bars were simplified into a holistic mechanical model. Based on the Winkler elastic foundation beam method, a horizontal displacement calculation method for single micro steel pipe pile and anchor combination foundation was established, and the calculation results were compared with numerical simulation results. The results show that under the same working conditions, the stress and displacement of the new composite foundation anchor bars, grout, and surrounding rock are smaller. The new composite foundation is suitable for situations where the rock mass grade is extremely soft. The displacement generated by the new composite foundation under various load conditions gradually increases as the rock strength decreases. When the quality of the rock mass is poor, measures such as increasing the cross-sectional area and length of the steel pipe can be taken to limit the horizontal displacement of the composite foundation.

References:

[1] 程永锋,赵江涛,鲁先龙,等.特高压直流输电线路岩石锚杆群锚基础试验[J].中国电力,2014,47(12):55-60.
CHENG Yongfeng,ZHAO Jiangtao,LU Xianlong,et al.Field full-scale tests on group anchorage rock foundations of DC UHV transmission line project[J].Electric Power,2014,47(12):55-60.
[2]吴晓锋,张 楷,赵贞欣,等.输电线路及电气化铁路新型伞形桩基础应用研究[J].电气化铁道,2021,32(4):91-94.
WU Xiaofeng,ZHANG Kai,ZHAO Zhenxin,et al.Study on application of new umbrella pile foundation for transmission lines and electrified railways[J].Electric Railway,2021,32(4):91-94.
[3]王月斌,王 伟,陈淑宏,等.特高压输电线路基础选型与优化[J].农村电气化,2016(11):16-18.
WANG Yuebin,WANG Wei,CHEN Shuhong,et al.Selection and optimization of UHV transmission line foundation[J].Rural Electrification,2016(11):16-18.
[4]郭 政.宁德霞浦某海上风电场基础选型研究[J].能源与环境,2022(2):16-19.
GUO Zheng.Study on foundation selection of an offshore wind farm in Xiapu,Ningde[J].Energy and Environment,2022(2):16-19.
[5]乾增珍,鲁先龙,童瑞铭.上拔水平力组合荷载作用下混凝土扩展基础承载性能试验[J].防灾减灾工程学报,2012,32(5):573-578.
QIAN Zengzhen,LU Xianlong,TONG Ruiming.Experiments on bearing behavior concrete spread foundation under a combination action of uplift and lateral loads[J].Journal of Disaster Prevention and Mitigation Engineering,2012,32(5):573-578.
[6]乾增珍,鲁先龙.风积砂地基装配式基础下压水平力组合荷载试验[J].工程力学,2012,29(6):133-137,195.
QIAN Zengzhen,LU Xianlong.Field tests on assembly foundations subjected to compression and horizontal combination loads in aeolian[J].Engineering Mechanics,2012,29(6):133-137,195.
[7]吕 庆,李 欣,麻 坚,等.上拔-水平荷载作用下锚索承台基础受力变形特性[J].湖南大学学报(自然科学版),2022,49(7):106-112.
LU Qing,LI Xin,MA Jian,et al.Mechanical and deformation characteristics of cable anchored platform foundation under uplift and horizontal loads[J].Journal of Hunan University(Natural Sciences),2022,49(7):106-112.
[8]KYUNG D,LEE J.Uplift load-carrying capacity of single and group micropiles installed with inclined conditions[J].Journal of Geotechnical and Geoenvironmental Engineering,2017,143(8):04017031.
[9]陈 正,梅 岭,梅国雄.柔性微型桩水平承载力数值模拟[J].岩土力学,2011,7(6):2219-2224.
CHEN Zheng,MEI Ling,MEI Guoxiong.Numerical simulation of lateral bearing capacity of flexible micropiles [J].Rock and Soil Mechanics,2011,7(6):2219-2224.
[10]陈 焰,罗 旭,王新宽,等.输电线路装配式承台锚杆基础形式研究[J].电力勘测设计,2018(12):35-40.
CHEN Yan,LUO Xu,WANG Xinkuan,et al.Research on the foundation form of assembly cushion cap anchor rod of transmission line[J].Electric Power Survey & Design,2018(12):35-40.
[11]金子皓,王京学,冀晓东,等.偏心对全金属装配式基础抗拔性能影响研究[J].地下空间与工程学报,2022,18(增1):209-215,225.
JIN Zihao,WANG Jingxue,JI Xiaodong,et al.Numerical simulation study on the effect of eccentricity on the uplift bearing performance of all-metal assembly foundations[J].Chinese Journal of Underground Space and Engineering,2022,18(S1):209-215,225.
[12]中国能源建设集团山西省电力勘测设计院有限公司.在岩石上群锚的输电线路杆塔的钢骨基础架结构:CN202220051161.3[P].2022-07-19.
China Energy Construction Group Shanxi Electric Power Survey and Design Institute Co.,Ltd.Steel frame foundation structure of transmission line tower with anchor on rock:CN202220051161.3[P].2022-07-19.
[13]架空输电线路锚杆基础设计规程:DL/T 5544—2018[S].北京:中国计划出版社,2018.
Code for design of anchor foundation of overhead transmission line:DL/T 5544—2018[S].Beijing:China Planning Press,2018.
[14]钢结构设计标准:GB 50017—2017[S].北京:中国建筑工业出版社,2017.
Standard for design of steel structures:GB 50017—2017[S].Beijing:China Architecture & Building Press,2017.
[15]LUBLINER J,OLIVER J,OLLER S,et al.A plastic-damage model for concrete[J].International Journal of Solids and Structures,1989,25(3):299-326.
[16]《工程地质手册》编委会.工程地质手册[M].5版.北京:中国建筑工业出版社,2018.
Editorial Board of Handbook of Engineering Geology.Engineering geology manual [M].5th ed.Beijing:China Architecture & Building Press,2018.
[17]练其安.钢管混凝土内配型钢拉拔性能研究[D].杭州:浙江大学,2018.
LIAN Qian.Research on pull-out performance of profile steel in concrete filled steel tube[D].Hangzhou:Zhejiang University,2018.
[18]宋壁丞.风力发电机岩石锚杆基础受力状态分析与监测[D].沈阳:沈阳建筑大学,2014.
SONG Bicheng.Stress state analysis and monitoring on rock anchor foundation for wind turbo-generator[D].Shenyang:Shenyang Jianzhu University,2014.
[19]赵 琳,李建波,付 兵.光面钢筋拉拔试验细观数值模拟研究[J].建筑科学与工程学报,2013,30(2):104-108.
ZHAO Lin,LI Jianbo,FU Bing.Research on mesoscale numerical simulation of smooth rebar pullout test[J].Journal of Architecture and Civil Engineering,2013,30(2):104-108.
[20]刘 丰.风电场中岩石锚杆风机基础应用研究[D].沈阳:沈阳建筑大学,2022.
LIU Feng.Study on basic application of rock bolt fan in wind farm[D].Shenyang:Shenyang Jianzhu University,2022.
[21]刘振亚.国家电网公司输变电工程通用设计[M].北京:中国电力出版社,2011.
LIU Zhenya.General design of power transmission and transformation project of state grid corporation [M].Beijing:China Electric Power Press,2011.
[22]架空输电线路基础设计技术规程:DL/T 205219—2014[S].北京:中国计划出版社,2014.
Technical code for design of foundation overhead transmission lines:DL/T 205219—2014[S].Beijing:China Planning Press,2014.
[23]夏永旭,王永东.隧道结构力学计算[M].2版.北京:人民交通出版社,2012.
XIA Yongxu,WANG Yongdong.Mechanical calculations of the tunnel structure[M].2nd ed.Beijing:China Communications Press,2012.

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Last Update: 2024-12-10