埕岛油田反复插拔桩区域就位风险及预防措施
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安涛, 林增勇, 张达
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Risk and Preventive Measures of Pile Placement in Chengdao Oilfield
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AN Tao, LIN Zengyong, ZHANG Da
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表3 A井场动平台右艉桩工程地质调查成果参数表
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Tab.3 Soil parameters of borehole at wellsite of jack-up right stern pile at Well Site A
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土层
编号 | 土层名称 | 深度/m | 水下重度/
(kN·m-3) | 黏性土设计
抗剪强度/kPa | 粒状土设计
抗剪强度,Φ/(°) | 承载力系数 | | Nq | Nr | | 1 | 粉土 | 0.0~2.5 | 7.2~7.9 | | 13~18 | 3.9 | 2.6 | | 2 | 粉土 | 2.5~3.2 | 8.0~9.0 | | 18~22 | 6.4 | 5.4 | | 3 | 粉质黏土 | 3.2~5.2 | 8.0~9.0 | 35.2~52.6 | | | | | 4 | 粉土 | 5.2~10.6 | 9.3~10.3 | | 25~30 | 14.7 | 16.7 | | 5 | 粉砂 | 10.6~17.2 | 9.8~10.5 | | 25~30 | 14.7 | 16.7 | | 6 | 粉质黏土 | 17.2~18.6 | 10.3~10.8 | 58.6~83.5 | | | | | 7 | 粉土 | 18.6~20.0 | 10.3~10.8 | | 28~32 | 18.4 | 22.4 |
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