岳建勇¹，黄绍铭²，王卫东³，吴江斌³，夏焰光⁴
    （1 现代设计集团上海建筑设计研究院有限公司，上海200041; 2 上海现代建筑设计集团有限公司，上海200041; 3 现代设计集团华东建筑设计研究院有限公司，上海200002；4 武汉地质勘察基础工程有限公司(沪)，上海200063）

[摘要] 由于桩端后注浆灌注桩可弥补常规灌注桩自身的不足，因而桩端后注浆灌注桩在上海软土地区逐步得到广泛的工程应用，但目前在上海地区对桩端后注浆灌注桩单桩极限承载力的估算尚无合适的计算方法。本文根据上海地区十余个比较典型的桩端后注浆灌注桩桩基工程实例，提出了上海地区的桩端后注浆桩单桩极限承载力的估算方法——灌注桩经验参数上限法。
[关键词] 桩端后注浆灌注桩；灌注桩；单桩极限承载力

Discussion on Estimation Calculation Method of the Ultimate Bearing Capacity of a Single Base-grouting Bored Pile in Shanghai Soft Soil Area
Yue Jianyong¹,  Huang Shaoming²,  Wang Weidong³,  Wu Jiangbin³,  Xia Yanguang⁴
(1Xian Dai Architectural Design Group, Shanghai Institute of Architectural Design & Research Co. ,Ltd., Shanghai 200041, China; 2 Shanghai Xian Dai Architectural Design( Group) , Co., Ltd. , Shanghai   200041; 3 Xian Dai Architectural Design Group, East China Architectural Design&Research Institute Co. , Ltd. , Shanghai  200002, China; 4 Shanghai Branch of Wuhan Ceological Prospection & Foundation Engineering Company, Shanghai  200063, China)

Abstract: Because of the shortcomings of bored piles in Shanghai soft soil area, base-grouting bored piles have been widely used in the foundation engmeering of buildings, but there is not a suitable calculation method of the ultimate bearing capacity of a single base-grouting bored pile in Shanghai soft soil area. Based on the experience of tens of pile foundations in which base-grouting bored piles are used, a new upper boundary method of empirical parameter has been put forward to estimate the ultimate bearing capacity of a single base-grouting bored pile.
Keywords: base-grouting bored pile; bored pile; ultimate bearing capacity of a single pile