DOC《UDC》

30 6.6 其他有关计算

31 7 人工挖孔灌注桩

31 7.1 一般规定

31 7.2 施工准备

31 7.3 成孔

32 7.4 钢筋笼制作与安装

34 7.5 混凝土施工

36 7.6 安全

38 8 冲击成孔灌注桩

40 8.1 一般规定

40 8.2 施工准备

40 8.3 成孔

41 8.4 清孔

44 8.5 钢筋笼制作与安装

45 8.6 混凝土施工

45 8.7 安全

45 9 旋挖成孔灌注桩

46 9.1 一般规定

46 9.2 施工准备

46 9.3 成孔

46 9.4 清孔

47 9.5 钢筋笼制作与安装

48 9.6 混凝土施工

48 9.7 安全

48 10 全套管管内取土(岩)成孔灌注桩

49 10.1 一般规定

49 10.2 施工准备

49 10.3 成孔

49 10.4 清孔

50 10.5 钢筋笼制作与安装

51 10.6 混凝土施工

51 10.7 安全

51 11 桩基工程质量检查及验收

51 11.1 一般规定

51 11.2 施工前检验

52 11.3 施工检验

52 11.4 施工后检验

56 11.5 基桩及承台工程验收资料

57 附录A溶洞的稳定性半定量计算

59 附录B桩的极限侧阻力标准值、桩的极限端阻力标准值

63 附录C溶洞顶板岩体的抗冲切承载力验算

66 附录D桩基位于临空面附近滑移稳定性验算

66 附录E灌注桩成孔施工允许偏差

67 附录F大直径桩端阻力载荷试验要点

68 附录G基岩内桩侧阻力试验要点

69 本规范用词说明

71 条文说明

72 Contents

1 General and normative references…5 1.1 General…5 1.2 Normative reference standards

5 2 Terms and symbols…6 2.1Terms…6 2.2 Symbols…9

3 Basic requirement…12

4 Site Investigation…14 4.1General requirement…14 4.2 Detailed investigation…16 4.3 Construction investigation…17 4.4 Evaluation…18

5 Design and structure…19 5.1General requirement…19 5.2 Type selection and arrangement of pile foundation…19 5.3 Structure of pile foundation…21 5.4Structure of pile foundation cap…23

6 Calculation

25 6.1 Calculation of load effect on top of pile foundation…25 6.2 Calculation of vertical load on pile foundation…25 6.3 Vertical ultimate bearing capacity of single pile foundation…26 6.4 Checking calculation of pile foundation stability under special conditions……………………30 6.5 Pile foundation cap calculation…30 6.6 Other relevant calculations…31

7 Artificial Digging Pile…31 7.1General Regulations…31 7.2 Construction Preparation…31 7.3Hole-forming…32 7.4Reinforcement Cage Production Insrallation…34 7.5Concrete Construction…36 7.6Safety…38

8 Impact hole filling pile…40 8.1 General Regulations…40 8.2 Construction Preparation…40 8.3Hole-forming…41 8.4 hole Cleaning…41 8.5Reinforcement Cage Production Installation…45 8.6Concrete construction…45 8.7Safety…45

9 DRILLING Pile with Rotary drilling Bucke…46 9.1 General Requirement…46 9.2 Construction Preparation…46 9.3Drilling…46 9.4 hole Cleaning…47 9.5Production and Insrallation of Reinforcing steel Cage…48 9.6Concrete construction…48 9.7Safety…48

10 Full-casing MechanicalSoil(rock)-sampling Drilling Pile…49 10.1 General Requirement…49 10.2 Construction Preparation…49 10.3 Drilling…49 10.4 hole cleaning…50 10.5Production and Insrallation of Reinforcing steel Cage…51 10.6Concrete construction…51 10.7Safety…51 11Quality Inspection and Acceptance of Pile Foundation Engineering…51 11.1General Provisions…51 11.2Pre-construction Check…52 11.3In-construction Check…52 11.4Post-construction Check…56 11.5Pile Cap and Engineering Acceptance Data…57 Appendix A Semiquantitative stability calculation of cave…59 Appendix B Standard values of ultimate lateral resistance of pile foundation and ultimate bottom resistance of pile foundation