采用强夯法处理的地基,应进行强夯试验;采用强夯置换法处理的地基,必须通过现场试验,确定其适用性和处理效果,确定合适的强夯设计参数和施工参数。
The dynamic compaction test should be carried out for the foundation treated by dynamic compaction method, and the field test must be carried out to determine the applicability and treatment effect of the foundation treated by dynamic compaction replacement method, and to determine the appropriate dynamic compaction design parameters and construction parameters.
(1 )确定地基有效加固深度,确定处理后地基土的强度、承栽力和变形指标;
(1) Determine the effective reinforcement depth of the foundation, and determine the strength, bearing capacity and deformation index of the treated foundation soil;
(2) 确定合适的夯击能、夯捶尺寸和落距等施工参数;
(2) Determine the suitable construction parameters such as ramming energy, ramming size and drop distance.
(3) 校核强夯后场地的沉降量或抬升簠,为确定起夯面标高提供依据;
(3) Check the settlement or uplift of the site after dynamic compaction to provide a basis for determining the elevation of the tamping surface;
(4) 确定夯点间距、夯击次数、夯击遍数、最后两击夯沉蚩和间隔时间等设计参数;
(4) Determine the design parameters such as the distance between tamping points, the number of tamping times, the number of tamping times, the last two tamping sinks and the interval time.
(5) 确定强夯施工停夯标准等施工质星控制指标;
(5) Determine quality control indicators such as stopping standards for dynamic compaction construction;
(6) 了解强夯施工振动、侧向挤压等对周边环境和工程的影响,确定与周边工 程的安全施工最小距离。
(6) Understand the impact of dynamic compaction construction vibration and lateral extrusion on the surrounding environment and engineering, and determine the minimum distance from the safe construction of surrounding projects.