246-2017

GUIDANCE NOTES ON GEOTECHNICAL PERFORMANCE OF SPUDCAN FOUNDATIONS

246-2017 发布历史

Scope and Application The Guidance Notes apply to the geotechnical design@ installation and operation of jack up spudcan foundations. These recommendations are to be used in conjunction with Part 3 of the ABS Rules for Building and Classing Mobile Offshore Drilling Units (MODU Rules). As MODU Classification is not site-specific in nature@ the Owner specifies conditions for which the unit is to be installed. Guidance for site assessment of jackup operability is given in Section 2@ followed by spudcan penetration prediction in single layer soil@ such as clay and sand in Section 3. In strong over soft soil where punchthrough failure is a major concern on design of jackup spudcan foundation@ the recommended prediction methods to calculate spudcan bearing capacity in layered soils are introduced in Section 4@ as well as the mitigation method for reducing punch-through failure. Three steps are suggested in the order of increasing complexity and reducing conservatism for the overall foundation stability assessment in Section 5. The procedure for calculating foundation fixity is presented in Section 6. If the proximity of the spudcan to the pile is less than one spudcan diameter@ detailed analysis is recommended to estimate the severity of spudcan-pile interaction problems as given in Section 7. The footprint characteristics and its influence on spudcan-footprint interaction are presented in Section 8 as well as possible effective mitigation methods in various field conditions. These Guidance Notes are applicable to self-elevating units which undertake drilling@ construction@ support@ wind turbine installation or other offshore activities.

246-2017由ABS - American Bureau of Shipping 发布于 2017-01-01，并于 2017-02-08 实施。

246-2017的历代版本如下：

• 1993年06月02日 246-1993
• 2011年05月25日 246-2011
• 2017年01月01日 246-2017

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标准号

246-2017

发布日期

2017年01月01日

实施日期

2017年02月08日

废止日期

无

中国标准分类号

/

国际标准分类号

/

发布单位

ABS - American Bureau of Shipping

引用标准

55

适用范围

Scope and Application The Guidance Notes apply to the geotechnical design@ installation and operation of jack up spudcan foundations. These recommendations are to be used in conjunction with Part 3 of the ABS Rules for Building and Classing Mobile Offshore Drilling Units (MODU Rules). As MODU Classification is not site-specific in nature@ the Owner specifies conditions for which the unit is to be installed. Guidance for site assessment of jackup operability is given in Section 2@ followed by spudcan penetration prediction in single layer soil@ such as clay and sand in Section 3. In strong over soft soil where punchthrough failure is a major concern on design of jackup spudcan foundation@ the recommended prediction methods to calculate spudcan bearing capacity in layered soils are introduced in Section 4@ as well as the mitigation method for reducing punch-through failure. Three steps are suggested in the order of increasing complexity and reducing conservatism for the overall foundation stability assessment in Section 5. The procedure for calculating foundation fixity is presented in Section 6. If the proximity of the spudcan to the pile is less than one spudcan diameter@ detailed analysis is recommended to estimate the severity of spudcan-pile interaction problems as given in Section 7. The footprint characteristics and its influence on spudcan-footprint interaction are presented in Section 8 as well as possible effective mitigation methods in various field conditions. These Guidance Notes are applicable to self-elevating units which undertake drilling@ construction@ support@ wind turbine installation or other offshore activities.

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