基于静力触探试验指标的静钻根植桩承载力计算方法
引用文献：
吴江斌，凌造， 王卫东， 胡耘. 基于静力触探试验指标的静钻根植桩承载力计算方法[J]. 建筑结构，2023，48（08）：137-142.
WU Jiangbin， LING Zao， WANG Weidong， HU Yun. Calculation method of bearing capacity of pre-bored precast pile with enlarged base by index of CPT[J]. Building Structure，2023,48（08）：137-142.
摘要：静钻根植桩因其兼顾高承载性能和绿色环保的优势而逐步在上海地区得到应用。虽然上海市《地基基础设计标准》(DGJ 08-11—2018)已将植入桩工法纳入到预制桩的推荐施工工法中，但并未提出相关的承载力计算细则，给静钻根植桩设计与应用带来了难度与不确定性。借鉴日本植入桩的承载力计算思路，等效为预制桩直径计算侧阻力，结合上海地区估算桩基承载力的经验，以单桥静力触探比贯入阻力为基本参数，引入侧阻力调整系数和扩大头阻力系数分别计算桩侧阻力和端阻力，提出了一种实用的静钻根植桩竖向承载力计算方法。工程实例计算表明，该承载力计算方法具有一定的可靠性，可为上海地区静钻根植桩设计提供参考。
关键词：静钻根植桩；承载力；计算方法；静力触探比贯入阻力；静载试验；
基金：上海市优秀学术/技术带头人计划(18XD1422600)；上海市青年科技启明星计划(18QB1400300)。
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参考文献[1] 张日红，吴磊磊，孔清华.静钻根植桩基础研究与实践[J].岩土工程学报，2013,35(S2):1200-1203.
[2] 周佳锦，龚晓南，王奎华，等.静钻根植竹节桩荷载传递机理模型试验[J].浙江大学学报(工学版),2015,49(3):531-537,546.
[3] ZHOU J J,GONG X N,WANG K H,et al.Testing and modeling the behavior of pre-bored grouting planted piles under compression and tension[J].Acta Geotechnica,2017,12(5):1061-1075.
[4] 王卫东，凌造，吴江斌，等.上海地区静钻根植桩承载特性现场试验研究[J].建筑结构学报，2019,40(2):238-245.
[5] LING Z,WANG W D,WU J B,et al.Shaft resistance of pre-bored precast piles in Shanghai clay[J].Proceedings of the Institution of Civil Engineers-Geotechnical Engineering,2019,172(3):228-242.
[6] 王卫东，凌造，吴江斌，等.上海地区静钻根植桩成桩效果与质量试验研究[J].建筑结构，2019,49(12):115-119.
[7] 地基基础设计标准：DGJ 08-11—2018 [S].上海：同济大学出版社，2019.
[8] コンクリートパイル建設技術協会.既製コンクリート杭基礎構造設計マニュアル[M].東京：コンクリートパイル建設技術協会，2009.
[9] KARKEE M B,KANAI S,HORIGUCHI T.Quality assurance in bored PHC nodular piles through control of design capacity based on loading test data[C]//Proceedings of the 7th International Conference and Exhibition,Piling and Deep Foundations.Vienna:Deep Foundations Institute,1998,1(24):1-9.
[10] OGURA H,SUMI M,GOAN M,et al.Vertical bearing capacity of pile installed by “EX MEAGTOP”method-base enlarged pre-boring and grouting method for pre-cast pile [J].General Building Research Corporation,2005,30(2):21-30.
[11] KOBAYASHI K,OGURA H.Vertical bearing capacity of bored pre-cast pile with enlarged base considering diameter of the enlarged excavation around pile toe[C]//Advances in Deep Foundations:International Workshop on Recent Advances of Deep Foundations.Yokosuka:Taylor & Francis,2007:277-283.
[12] 静钻根植桩基础技术规程：DB33/T 1134—2017 [S].北京：中国计划出版社，2017.
[13] 周佳锦，龚晓南，王奎华，等.静钻根植竹节桩在软土地基中的应用及其承载力计算[J].岩石力学与工程学报，2014,33(S2):4359-4366.
[14] 水泥土复合管桩基础技术规程：JGJ/T 330—2014[S].北京：中国建筑工业出版社，2014.
[15] 上海市静力触探技术规程：DG/TJ 08-2189—2015 [S].上海：同济大学出版社，2016.
[16] 凌光容，安海玉，谢岱宗，等.劲性搅拌桩的试验研究[J].建筑结构学报，2001,22(2):92-96.
[17] 黄强.桩侧摩阻力计算的简单数学模型[J].岩土工程学报，1986,8(5):84-90.
[18] 吴江斌，凌造，张日红.上海地区静钻根植桩技术的研究与应用[C]//第14届全国桩基工程学术会议论文集.北京：中国建筑工业出版社，2019:353-361.
[2] 周佳锦，龚晓南，王奎华，等.静钻根植竹节桩荷载传递机理模型试验[J].浙江大学学报(工学版),2015,49(3):531-537,546.
[3] ZHOU J J,GONG X N,WANG K H,et al.Testing and modeling the behavior of pre-bored grouting planted piles under compression and tension[J].Acta Geotechnica,2017,12(5):1061-1075.
[4] 王卫东，凌造，吴江斌，等.上海地区静钻根植桩承载特性现场试验研究[J].建筑结构学报，2019,40(2):238-245.
[5] LING Z,WANG W D,WU J B,et al.Shaft resistance of pre-bored precast piles in Shanghai clay[J].Proceedings of the Institution of Civil Engineers-Geotechnical Engineering,2019,172(3):228-242.
[6] 王卫东，凌造，吴江斌，等.上海地区静钻根植桩成桩效果与质量试验研究[J].建筑结构，2019,49(12):115-119.
[7] 地基基础设计标准：DGJ 08-11—2018 [S].上海：同济大学出版社，2019.
[8] コンクリートパイル建設技術協会.既製コンクリート杭基礎構造設計マニュアル[M].東京：コンクリートパイル建設技術協会，2009.
[9] KARKEE M B,KANAI S,HORIGUCHI T.Quality assurance in bored PHC nodular piles through control of design capacity based on loading test data[C]//Proceedings of the 7th International Conference and Exhibition,Piling and Deep Foundations.Vienna:Deep Foundations Institute,1998,1(24):1-9.
[10] OGURA H,SUMI M,GOAN M,et al.Vertical bearing capacity of pile installed by “EX MEAGTOP”method-base enlarged pre-boring and grouting method for pre-cast pile [J].General Building Research Corporation,2005,30(2):21-30.
[11] KOBAYASHI K,OGURA H.Vertical bearing capacity of bored pre-cast pile with enlarged base considering diameter of the enlarged excavation around pile toe[C]//Advances in Deep Foundations:International Workshop on Recent Advances of Deep Foundations.Yokosuka:Taylor & Francis,2007:277-283.
[12] 静钻根植桩基础技术规程：DB33/T 1134—2017 [S].北京：中国计划出版社，2017.
[13] 周佳锦，龚晓南，王奎华，等.静钻根植竹节桩在软土地基中的应用及其承载力计算[J].岩石力学与工程学报，2014,33(S2):4359-4366.
[14] 水泥土复合管桩基础技术规程：JGJ/T 330—2014[S].北京：中国建筑工业出版社，2014.
[15] 上海市静力触探技术规程：DG/TJ 08-2189—2015 [S].上海：同济大学出版社，2016.
[16] 凌光容，安海玉，谢岱宗，等.劲性搅拌桩的试验研究[J].建筑结构学报，2001,22(2):92-96.
[17] 黄强.桩侧摩阻力计算的简单数学模型[J].岩土工程学报，1986,8(5):84-90.
[18] 吴江斌，凌造，张日红.上海地区静钻根植桩技术的研究与应用[C]//第14届全国桩基工程学术会议论文集.北京：中国建筑工业出版社，2019:353-361.
Calculation method of bearing capacity of pre-bored precast pile with enlarged base by index of CPT
Abstract: The pre-bored precast pile with enlarged base(PPEB pile) has been gradually applied in Shanghai area because of its advantages of high bearing capacity and green environmental protection. Although the embedded pile method has been incorporated into the recommended construction method of pre-bored precast pile in the Shanghai Foundation design code(DGJ 08-11—2018), but the relevant detailed rules for calculating the bearing capacity have not been put forward, which brings difficulty and uncertainty to the design and application of PPEB pile.The idea of calculating the bearing capacity of pre-bored precast piles in Japan was used for reference, the equivalent diameter of pre-bored precast piles was used to calculate the shaft resistance. Combined with the experience of estimating the bearing capacity of pile foundation in Shanghai area, the specific penetration resistance of single bridge CPT was taken as the basic parameter. The shaft resistance adjustment coefficient and the toe resistance coefficient were introduced to calculate the shaft resistance and toe resistance respectively, and a practical method for calculating the vertical bearing capacity of PPEB pile was put forward. The calculation of engineering example shows that the calculation method of bearing capacity is reliable and can provide reference for the design of PPEB pile in Shanghai area.
Keywords: pre-bored precast pile with enlarged base; bearing capacity; calculation method; specific penetration resistance of CPT; static load test
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