With the rapid development of construction projects, the ways of various towns, townships and cities have been utilized and developed, and the dynamic compaction construction technology has been widely used. In the face of fierce market competition,

个别建造工程对地基加固非常常用的两种方法：一种是强夯法跟另一种强夯置换法。强夯机租赁基坑的夯实范围应大于基础底面。开挖时，基坑每边比设计宽度加宽不宜小于0.3米，以便于夯实工作的进行，基坑边坡适度放缓。夯实前，基坑底面应高出设计标高，预留土层的厚度可为试夯时的总下沉量加50100毫米。夯实完毕，将基坑表面拍实设计标高。

There are two commonly used methods for foundation reinforcement in individual construction projects: one is dynamic compaction method and the other is dynamic compaction replacement method. The rental price of dynamic compactor the tamping range of foundation pit shall be greater than the bottom surface of foundation. During excavation, the width of each side of the foundation pit shall not be less than 0.3m wider than the design width, so as to facilitate the compaction work, and the slope of the foundation pit shall be moderately slowed down. Before compaction, the bottom of the foundation pit shall be higher than the design elevation, and the thickness of the reserved soil layer can be the total settlement during trial compaction plus 50 to 100 mm. After compaction, the surface of the foundation pit shall be compacted to the design elevation.

强夯置换法是指饱跟软土质，在夯点铺垫碎石块跟矿渣形成一个庞杂地基，利用重锤从预设的高度产生夯击能，将碎石块跟矿渣挤入地基中，地基形成一个粒料墩，粒料墩有较好的透水性，从而进步承载力，减少沉降。本地强夯施工前应进行试夯，选定夯锤重量、底面直径和落距，以便确定下沉量及相应的夯实遍数和总下沉量等施工参数。试夯的密实度和夯实程度需要到达设计要求。

Dynamic compaction replacement method refers to filling soft soil, paving crushed stones and slag at the tamping point to form a complex foundation, using the heavy hammer to generate tamping energy from the preset height, squeezing crushed stones and slag into the foundation, and forming a granular pier with good water permeability, so as to improve the bearing capacity and reduce settlement. Before the construction of local dynamic compaction, trial compaction shall be carried out, and the weight, bottom diameter and falling distance of the rammer shall be selected, so as to determine the settlement, corresponding compaction times, total settlement and other construction parameters. The compactness and compaction degree of trial compaction shall meet the design requirements.

强夯法又称为能源固结法。强夯机租赁基坑的夯实范围应大于基础底面。开挖时，基坑每边比设计宽度加宽不宜小于0.3米，以便于夯实工作的进行，基坑边坡适度放缓。夯实前，基坑底面应高出设计标高，预留土层的厚度可为试夯时的总下沉量加50100毫米。夯实完毕，将基坑表面拍实设计标高。实用于碎石土、砂土、湿陷性黄土、低饱跟的粉土跟粘性土等地基，是指起重机的重锤从预设的高度自由下落，促使地基瞬速固结方法。应用了起重设备，将夯锤（8t—30t）晋升到预设的高度（6米—20米）自由下落，对地基施加夯击能的冲击波跟夯击应力，地面裂隙，孔隙间水跟气体逸出，地基紧缩密实，土体局部液化，减少沉降，地基达到承载力。

Dynamic compaction method is also called energy consolidation method. The rental price of dynamic compactor the tamping range of foundation pit shall be greater than the bottom surface of foundation. During excavation, the width of each side of the foundation pit shall not be less than 0.3m wider than the design width, so as to facilitate the compaction work, and the slope of the foundation pit shall be moderately slowed down. Before compaction, the bottom of the foundation pit shall be higher than the design elevation, and the thickness of the reserved soil layer can be the total settlement during trial compaction plus 50 to 100 mm. After compaction, the surface of the foundation pit shall be compacted to the design elevation. It is applicable to the foundation of gravel soil, sandy soil, collapsible loess, low saturated silt and cohesive soil. It refers to the method that the heavy hammer of the crane falls freely from the preset height to promote the instantaneous consolidation of the foundation. The lifting equipment is applied to raise the rammer (8t-30t) to the preset height (6m-20m) and fall freely. The shock wave and tamping stress of tamping energy are applied to the foundation, the water and gas between ground fissures and pores escape, the foundation is compacted, the soil is locally liquefied, the settlement is reduced, and the foundation reaches the bearing capacity.

1：强夯法的加固应依据现场试夯或当地教训判断

1: The reinforcement of dynamic compaction method shall be judged according to the on-site trial compaction or local lessons

2：强夯加固时所产生的振动会对周边的建造物跟途径产生影响，应采取防震沟或防震办法

2: The vibration generated during dynamic compaction reinforcement will affect the surrounding buildings and ways, so shockproof ditch or shockproof method shall be adopted

3：夯击能的大小、夯击次数、夯击程度应依照设计计划进行施工

3: The size of tamping energy, tamping times and tamping degree shall be constructed according to the design plan

4：夯击点的位置、夯击点的散布应采取正方形、三角形安排

4: The location of tamping points and the distribution of tamping points shall be arranged in square and triangle

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