Through a lot of engineering practice, this paper further summarizes the successful experience of foundation treatment by deep dynamic compaction method in hole in building foundation treatment engineering. It has the following characteristics:

1、适用范围广泛，可用于各类地基处理，在地基处理工程中，孔内深层强夯处理技术和其他技术相比，能适用于各种复杂地基加固处理，具有广泛的适用性。

1. In the foundation treatment engineering, the deep dynamic compaction technology in the hole can be applied to various complex foundation reinforcement treatment compared with other technologies.

如用于大厚度的黄土，杂填土，液化土地基和各类软弱土，湿性土以及具有酸，碱，盐腐蚀的地基，还可用于具有硬夹层的不均匀地基，石料及废料回填垃圾地基以及地下人防工事等各种复杂建筑场地的处理。通过钻孔。强力冲孔等手段成孔，只要能形成桩孔的地基，不论孔内有无地下水均可采用本法加固处理。

Such as large thickness of loess, miscellaneous fill, liquefied soil foundation and all kinds of soft soil, wet soil and with acid, alkali, salt corrosion foundation, can also be used for uneven foundation with hard interlayer, stone and waste backfill, garbage foundation and underground civil air defense works and other complex construction sites. By drilling. As long as the foundation of pile hole can be formed, no matter whether there is underground water in the hole, this method can be used to reinforce the hole.

总之，采用孔内深层强夯处理技术，即可地基土的湿陷性，液化性，它兼有承载桩的特性以及刚度均匀符合地基的特性，不仅承载力高，而且压缩变形小。

In a word, the collapsibility and liquefaction of the foundation soil can be eliminated by using the deep dynamic compaction treatment technology in the hole. It has the characteristics of bearing pile and uniform stiffness, which conforms to the characteristics of foundation. It not only has high bearing capacity, but also has small compression deformation.

2、用料标准低，就地取材，该技术特点之一就是能就地取材，凡是无机固体材料如土，砂，石，碎瓦，混凝土块，工业废料及其混合物等均可使用，而且用料不需严格加工，凡能填入孔内的无机固体材料均可使用，用料不需长途运输。

2. One of the technical features of this technology is that it can use local materials. All inorganic solid materials such as soil, sand, stone, broken tile, concrete block, industrial waste and its mixture can be used, and the materials need not be strictly processed. All inorganic solid materials that can be filled into the hole can be used without long-distance transportation.

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