摘要
针对中化南通456号罐组桩基础施工项目,介绍了石油储罐静压管桩沉桩施工时会对周边土体产生挤土效应,引起周围土体破坏,产生土体移位、涌起、桩身上浮等现象,对工程桩本身和临近储罐造成危害及破坏的情况,并结合工程地质、地下水位和施工特点,阐述了采用综合性预防挤土效应和控制措施,包括设计阶段的桩尖类型选择、应力释放孔的位置、施工路线的优化,以及采用跳压法施工、控制沉桩速率、设置偏移和沉降观测点等达到了预期目的,有效地规避了倒罐带来的安全风险和成本增加,使生产经营正常开展,保证了项目质量并按期完成。
The static pressure tubal piling construction of tank can produce soil squeezing effect, causing the destruction of soil around the pile, generating the phenomena of soil displacement, surging, pile floating, which results in damage and destruction of the pile itself and the adjacent tank.The preventive measures of anti- squeezing effect in pile construction are varied, combining engineering geology and construction characteristics, applying comprehensive antisqueezing options, the better control effect can often be achieved. Combining the pile foundation construction and the surrounding tank safety control of No.456 tanks group of SinoChem in Nantong, integrating the application of various control measures affecting soil squeezing, the adverse effects f the squeezing stress of piling on the pile itself and urrounding of tank are solved, which provides reference of security monitoring and preventive measures for the piling construction of static pressure tubal pile ofadjacent tanks.
出处
《石油库与加油站》
2013年第6期3-6,2+1,共4页
Oil Depot And Gas Station
关键词
静压管桩施工
挤土效应
应力释放孔
安全监测
static pressure tubal piling construction,soil squeezing effect,stress release hole,security monitoring
