With the sumarization of dynamic compaction method applied to mountain cutting and sea filling engineering in Shenzhen area, this paper analysed the reasonablity of compaction parameters, the effectiveness and the reliability of the foundation treatment, two practical examples were given.

As difference on site condition,there are geotechnical problems in hill excavating and offshore filling.

Influences from the reclamation projects in western part of Shenzhen Bay on the discharging capacities of the rivers flowing into the sea are studied herein with depth-averaged 2D hydrodynamic numerical model.

The present paper established a two-dimensional depth-integrated hydrodynamic model in the Zhanjiang Bay, and simulated the tidal current fields before and after reclamation engineering in the bay.

The first step is to build a sea embankment for reclamation engineering,the quality of sea embankment plays an important role to secure the success of reclamation engineering,so the quality inspection of sea embankment is of great significance.

Reclamation brings us economic benefits and also many environmentalproblems, such as changing hydrodynamic conditions, water self-purification capacityweakened, deteriorating water quality, and causing sedimentation in harbor, and so on.