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Process for forming piles on mine dumping field

A technology for dumping dumps and piles, which is applied in sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of difficulty in forming large-diameter holes, and achieve the effect of improving bearing capacity

Inactive Publication Date: 2013-11-27
ANSTEEL GRP MINING CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

The eccentric down-the-hole hammer and pipe drilling technology has been popularized in China to form small-diameter holes in dumps, but it is very difficult to drill large-diameter holes. There is no precedent for using pile foundations to build on ultra-deep dumps

Method used

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  • Process for forming piles on mine dumping field

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Embodiment

[0030] A unit builds a belt corridor, and the support foundation of the belt corridor is located on the dump site. The stratum distribution of the dump site is as follows: the newly discharged gravel soil is 8-11 meters, the maximum particle size is 350 mm, and the structure is loose; the slope accumulation soil 1-2 meters, clay containing gravel, the characteristic value of bearing capacity is 180kpa; strongly weathered mixed rock is 2-3 meters, the characteristic value of bearing capacity is 600kpa; the layer of moderately weathered mixed rock is not penetrated, the characteristic value of bearing capacity is 1500kpa; the original ground slope 35 degrees.

[0031] The design adopts eccentric down-the-hole hammer and pipe drill. The casing is a straight seam welded pipe processed by 5 mm thick Q235b steel plate. 2 meters of mixed rock is the standard end hole), the diameter of the drill hole is 159 mm, the pile caps of three equilateral piles, the pile distance is 0.8 meters,...

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Abstract

The invention relate to the technical field of pile foundations, in particular to a process for forming piles on a mine dumping field. The process is characterized in that holes are formed by an eccentric down-hole hammer and pipe drilling technology, protection casings with holes are used as reinforcing bars of formed piles, and the piles are formed by high-pressure poured concrete and mortar. The process has the advantages that the high-pressure poured concrete and mortar are filled into gaps of the dumping field via the holes of the protection casings, so that expansion piles or expansion compact piles can be formed; pile bodies manufactured by the process can effectively guarantee that the concrete and mortar filled into the casings with the holes can be effectively and integrally combined with bearing strata after the piles are formed, the bearing capacity of each formed pile is greatly improved, and a perfect formed pile body structure is provided for the dumping field structure and complex regions with dimension stones, broken stones, miscellaneous fill and clay at the current stage.

Description

technical field [0001] The invention relates to the technical field of pile foundations, in particular to a pile forming process on a mine dump. Background technique [0002] As an indispensable auxiliary site for mining, mine dumps occupy a large amount of land resources and occupy the very limited building land of the mine. With the country's strict control of land resources, it is inevitable that the old dumps will be used as construction land. Most of the building foundations now require the removal of the original soil discharge and are built on natural foundations. If the construction time permits and the investment is large enough, it is of course the most reliable, but it may not be the most economical overall. [0003] The main reasons for the difficulties in using mine dumps as construction land are as follows: first, the materials for dumping are very complex, including huge stones, block stones, gravel, miscellaneous fill, clay, etc., and the discharge is irreg...

Claims

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Application Information

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IPC IPC(8): E02D5/38
Inventor 李海臣于开波戴若丁高凤家于向东
Owner ANSTEEL GRP MINING CO LTD
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