Discussions on “Technical code for building slope engineering (GB 50330-2013)”
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摘要: 针对《建筑边坡工程技术计规范》(GB 50330—2013)中的一些问题进行了讨论。指出该规范的一些不足、不当及不对之处。指出关于锚杆的抗拉和从砂浆中的抗拔设计应当使用分项系数法,而不是安全系数法;在安全系数法设计中,抗力应使用极限抗力的标准值,而非设计值。该规范所列的一些主动土压力计算的半经验公式,主要是源于无限斜坡的朗肯土压力理论解,但主动土压力的方向不正确,会造成较大的误差。在饱和黏性土边坡的稳定分析中,使用饱和重度与固结不排水强度指标的水土合算是错误的,有害的。Abstract: Some discussions on “Technical code for building slope engineering(GB 50330-2013)” are presented and some deficient, unsuitable and incorrect parts of the code are indicated. In checking the tensile strength of reinforcing bar (anchor wire) and the cohesive strength between reinforcing bar (anchor wire) and mortar in anchor engineering, the partial factor method but not the safety factor method is applicable and reasonable. In the safety factor method, using the characteristic value of the limit resistance but not the design value is correct. Some semi-empirical equations for the active earth pressure on the retaining wall are based on Rankine’s earth pressure theory for infinite soil slope in which the active earth pressure must be parallel to slope surface not perpendicular to wall surface. In the stability analysis of saturated clay slope, the combined calculation of water and soil pressure by means of the saturation unit weight and the CU shear strength parameters is wrong and harmful in engineering practice.
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[1] GB 50330—2013建筑边坡工程技术规范[S]. 2013. (GB 50330—2013 Technical code for building slope engineering[S]. 2013. (in Chinese)) [2] GB 50153—2008工程可靠性设计统一标准[S]. 2008. (GB 50153—2008 Unified standard for reliability design of engineering structure[S]. 2008. (in Chinese)) [3] GB 50009—2012建筑结构荷载规范[S]. 20012. (GB 50009—2012 Load code the design of building structure[S]. 2008. (in Chinese)) [4] 周景星, 李广信. 基础工程[M]. 3版. 北京: 清华大学出版社, 2015. (ZHOU Jing-xing, LI Guang-xin. Foundation engineering[M]. 3rd ed. Beijing: Tsinghua University Press, 2015. (in Chinese)) [5] GB 50068—2001建筑工程可靠性设计统一标准[S]. 2001. (GB 50068—2001 Unified standard for reliability design of building structure[S]. 2001. (in Chinese)) [6] GB 50007—2011建筑地基基础设计规范[S]. 2011. (GB 50007—2011 Code for design of building foundation[S]. 2011. (in Chinese)) [7] JGJ 120—2012建筑基坑支护技术规程[S]. 2012. (JGJ 120—2012 Technical specification for retaining and protection of building excavation[S]. 2012. (in Chinese)) [8] 李广信, 张丙印, 于玉贞. 土力学[M]. 2版. 北京: 清华大学出版社, 2013. (LI Guang-xin, ZHANG Bing-yin, YU Yu-zhen. Soil mechanics[M]. 2nd ed. Beijing: Tsinghua University Press, 2013. (in Chinese)) [9] 李广信. 对基坑工程有关规范的讨论(2)[J]. 工程勘察, 2013, 41(10): 1-6. (Li Guang-xin. The discussion on some codes concerned with building foundation pit (2)[J]. Geotechnical Investigation & Surveying, 2013, 41(10): 1-6. (in Chinese)) [10] 李广信. 对基坑工程有关规范的讨论(3)[J]. 工程勘察, 2013, 41(11): 1-4. (LI Guang-xin. The discussion on some codes concerned with building foundation pit (3)[J]. Geotechnical Investigation & Surveying, 2013, 41(11): 1-4. (in Chinese))
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