施工技术 2016年2月上 12 CONSTRUCTION TECHNOLOGY 第45卷第3期 D0I:10.7672/sgj82016030012 旋挖桩成孔钻速影响因素回归分析 程瀛,邵泉,李敏健,陈洋洋2 (1.广州市第一建筑工程有限公司,广东广州510060;2.广州大学工程抗震研究中心,广东广州510500) [摘要]根据宏城广场基坑项目APM中央工程桩的地质超前钻,对宝峨旋挖机钻进速度的差异性进行研究,通过 回归分析,得到钻进速度与岩层(土层)厚度、岩石埋深、岩石RQD值及岩石强度值之间的相互关系,并分析原因提 出处理措施,合理组织施工. [关键词]桩基工程;旋挖桩;钻速;施工机械;回归分析;施工技术 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2016)03-0012-04 Regression Analysis of Factors Affecting the Speeds of Rotary Drilling Hole Drilling Cheng Ying' Shao Quan' Li Minjian' Chen Yangyang (1.Guangzhou First Construction Engineering Co.Ltd.Guangzhou Guangdong 510060 China: 2.Earthquake Resistant Research Center of Guangzhou University Guangzhou Guangdong 510500 China) Abstract:Taking the foundation construction of Guangzhou Hongcheng Plaza as an example and according to the geology of the rock's advanced drilling in the area of Guangzhou metro's APM line the variability of drilling speeds of Bauer rotary drilling rig are taken account the regression analysis is applied to gain the relationships between the drilling speeds and such factors as thicknesses depths values of RQD and strengths then the related construction reasons are raised and some strategies are suggested. Key words:pile foundations;rotary digging piles;drilling speed;construction machinery;regression analysis;construction 随着施工机械工业的进步,越来越多的新型机城旅客自动输送系统)上方(见图1).该基坑采用 械运用于灌注桩的成孔,结合正、反循环的旋挖钻 的支护类型有:排桩(冲孔桩或旋挖桩)、立柱桩、地 进广泛应用于桩基工程. 下连续墙、内支撑、锚索和微型钢管桩,这些支护类 采用正循环旋挖钻进,提、下钻具会对孔壁形 型组合形成各种形式的支护体系. 成抽吸和挤压;而采用反循环旋挖钻进,桩...