JGJ UDC PROFESSIONALSTANDARD OFTHEPEOPLE'SREPUBLICOFCHINA 中华人民共和国行业标准 D JGJ79-2012 RecordNumberJ220-2012 TechnicalCodeforGroundTreatmentof Buildings 建筑地基处理技术规范 Issued on: August 23 2012 Implemented on: June 1 2013 Issued by the Ministry Housing and Urban-Rural Development of thePeople'sRepublic of China
Announcement of theMinistry ofHousing andUrban-Rural Developmentof thePeople'sRepublicofChina No.1448 Announcement on Issuing the Professional Standard "Technical Code for Ground Treatment of Buildings" “Technical Code for Ground Treatment of Buildings" has been approved as a professional standard with a serial number of JGJ 79-2012 and will be implemented on June 1 2013. 3.0.5 4.4.2 5.4.2 6.2.5 6.3.2 6.3.10 6.3.13 7.1.2 7.1.3 7.3.2 7.3.6 8.4.4 and 10.2.7 are pulsory provisions and must be enforced strictly. Professional standard “Technical Code for Ground Treatment of Buildings° (JGJ 79-2002) shall be abolished simultaneously. Authorized by the Standard Rating Research Institute of the Ministry of Housing and Urban-Rural Development of the People's Republic of China this Code is published by China Architecture and Building Press. Ministry of Housing and Urban-Rural Development of the People's Republic of China August 23 2012
Foreword According to the requirements of “Notice on Printing Development and Revision Plan of National Engineering Construction Standards and Codes in 2009" (Jian Biao [2009] No. 88) jo o Ground Treatment of Buildings° (JGJ 79-2002) was revised by the code drafting group through extensive investigation by earnestly summing up the practical experiences with reference to the relevant intemational standards and foreign advanced standards in coordination with the relevant domestic codes as well as on the basis of widely soliciting opinions. This Code prises of the following main technical content: 1. General Provisions; 2. Terms and Symbols; 3. Basic Requirements; 4. Replacement Layer of Compacted Fill; 5. Preloaded Ground; 6. Compacted Ground and Rammed Ground; 7. Composite Foundation; 8. Ground Improvement by Permeation and High Hydrofracture Grouting; 9. Ground Improvement by Micropiles; 10. Inspection and Monitoring. The main technical content revised in this Code is as follows: 1. The treated ground was required to be in conformity with the bearing capacity deformation and stability of buildings; 2. Inspection requirements for the prehensive safety coefficient of acceptance inspection were added for the ground treatment engineering by virtue of various integrated ground treatment methods; 3. Materials for ground treatment were added which shall meet the requirements of durability design according to the categories of the site environment; 4. Overall stability analysis method for the treated ground was added; 5. Design checking method for the replacement layer of tensile reinforcement was added; 6. Design and construction requirements for the bined preloading with surcharge of fill and vacuum preloading treatment were added; 7. Design parameters for the high pacting energy were added; 8. Checking method for the pile body strength of reinforcement with bond strength in case of base depth corrected for the bearing capacity of posite foundation was added; 9. Design and construction requirements for the posite foundation with multiple reinforcement of different materials or lengths were added; 10. Ground improvement by permeation and high hydrofracture grouting was added; 11. Ground improvement by micropiles was added; 12. Inspection and monitoring were added; 13. Key points for load test on single pile of posite foundation were added; 14. Key points for load test on treatment ground were added. The provisions printed in bold type in this Code are pulsory ones and must be enforced strictly. The Ministry of Housing and Urban-Rural Development of the People's Republic of China is in charge of the administration of this Code and the explanation of the pulsory provisions and the China Academy of Building Research is responsible for the explanation of specific technical content. During the process of implementing this Code the relevant opinions and advice whenever necessary can be posted or passed on to China Academy of Building Research (Address: No. 30 North Third Ring East Road Beijing 100013 China). Chief development organization of this Code: China Academy of Building Research Participating development organizations of this Code: China Jikan Research Institute of Engineering Investigations and Design Co. Ltd.
Hubei Design and Research Institute of Building Fujian Academy of Building Research Shenyuan Geotechnical Engineering Co. Ltd. of Shanghai Moderm Architectural Design (Group) Co. Ltd. China Zhonghua Geotechnical Engineering Co. Ltd. China Aviation Planning and Construction Development Co. Ltd. Tianjin University Tongji University Taiyuan University of Technology Zhengzhou University Multi-function Design and Research Academy Chief drafting staff of this Code: Teng Yanjing Zhang Yongjun Yan Mingli Zhang Feng Zhang Donggang Yuan Neizhen Hou Weisheng Ye Guanbao Bai Xiaohong Zheng Gang Wang Yaling Shui Weihou Zheng Jianguo Zhou Tonghe Yang Junfeng Chief examiners of this Code: Gu Guorong Zhou Guojun Gu Xiaolu Xu Zhangjian Zhang Bingji Kang Jingwen Mei Quanting Teng Wenchuan Xiao Ziqiang Pan Kaiyun Huang Xin
Contents General Provisions 2Terms and Symbols 2.1 Terms .. 2 2.2 Symbols 3 3 Basic Requirements. 6 4 Replacement Layer of Compacted Fill. .8 4.1General Requirements. .8 4.2 Design Considerations... .8 4.3 Construction.. 12 13 5 Preloaded Ground. 15 5.1 General Requirements.. .15 5.2 Design Considerations . 16 5.3 Construction. .22 ds s 24 6 Compacted Ground and Rammed Ground . 25 6.1 General Requirements. 25 6.2 Compacted Ground. 25 Rammed Ground. 29 7 Composite Foundation. 36 7.1General Requirements. 36 7.2 Composite Foundation with Sand-gravel Columns .38 7.3 Composite Foundation with Cement Deep Mixed Columns . 43 Composite Foundation with Jet Grouting.. 7.5 Composite Foundation with Compacted Soil-Lime Columns or Compacted Soil Columns.. 49 7.6 Composite Foundation with Rammed Soil-Cement Columns... 53 7.7 Composite Foundation with Cement-Fly Ash-Gravel Piles. 55 7.8 Composite Foundation with Impact Displacement Columns .58 7.9 Composite Foundation with Multiple Reinforcement of Different Materials or Lengths 60 8 Ground Improvement by Permeation and High Hydrofracture Grouting 66 8.1 General Requirements.. ...66 8.2Design Considerations. 66 8.3 Construction.. 69 8.4 Inspection. 72 9Ground Improvement by Micropiles. 74 9.1 General Requirements. 74 9.2 Root Piles. 74 9.3 Driven Cast-in-place Piles . 76 9.4 Grouting Piles with Steel-pipe. 77 9.5I Inspection. 77
英文版 JGJ 79-2012 建筑地基处理技术规范.pdf
