Application of strengthen ramming in dealing of soil foundation deeply filled

The test results of the deep backfill strengthened by high efficiency dynamic compaction show this technology is feasible and can be the reference for the similar engineering.

By introducing a new foundation treatment technology named expanded and compacted ash residue soil column composite foundation by using heavy hammer,controlling construction process and analyzing detection result,heavy miscellaneous fill layer s collapsibility can be eliminated and its bearing capacity of composite foundation soil can reached to 200kPa.

A practical engineering on deep fill treated by dynamic consolidation is introduced in this paper,especially, the design parameters,construction, and effect observed are briefly discussed and analyzed.

This thesis is completed on the basis of the Ministry of Railways complex test--the study for different fill depth on the cover slabsof the culverts on Qinhuangdao-Shenyang dedicated passenger line.

The present high pressure experimental research and analysis of undisturbed deep soil indicate that the static earth pressure of thick overburden is considerable different from that of superficial soil.

Based on the condition of Banji Coal Mine, this paper discusses the selection of shaft sinking techniques through thick overburden, and according to the concerned latest specifications, proposes the designing method of reinforced concrete wall and composite wall with steel plate and concrete in shaft drilling.

This paper summarizes the new freezing technology used in construction of the auxiliary shaft of Longgu Colliery in thick overburden.