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Special stratum spin-digging pile hole-forming construction method

A construction method and technology of rotary excavation piles, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of low construction difficulty and achieve the effects of improving construction efficiency, simple operation, and reasonable design of construction steps

Inactive Publication Date: 2016-11-30
MCC5 GROUP CORP SHANGHAI
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Problems solved by technology

The rotary excavator is very efficient in general clay layers, silt layers, and strongly weathered rock layers, and the construction difficulty is relatively low, but if it encounters silt, sand layers, slippery clay layers, and hard rock layers Rotary excavation construction will also encounter many difficulties
[0003] Therefore known rotary digging hole-forming technology exists above-mentioned various inconveniences and problems in special formation construction

Method used

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  • Special stratum spin-digging pile hole-forming construction method

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Embodiment 1

[0034] see now figure 1 , figure 1 It is a schematic diagram of forming a hole with a rotary-dug pile in a special formation according to an embodiment of the present invention.

[0035] The construction method of the special formation rotary-dug pile of the present invention uses a rotary drilling rig to be used for the stratum of sand layer, clay layer, crushed pebble layer, hard rock and silt, and is characterized in that comprising the following steps:

[0036] a. Positioning and setting out, use the total station to determine the position of the stake point, align the drill bit of the rotary drilling rig with the center of the pile position, and the deviation of the pile position shall not exceed 10mm;

[0037] b. Bury the casing, the casing should be buried with clay, and layered and symmetrically rammed; the buried casing is aimed at the silt formation, sand layer, and broken pebbles that are easy to collapse, and the guiding function needs to be strengthened or the su...

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Abstract

A spin-digging drilling rig is used for a sand stratum, a clay stratum, a broken pebble stone stratum, a hard rock stratum and a sludge stratum, and a special stratum spin-digging pile hole-forming construction method is characterized by including the steps of a, conducting positioning and paying off; b, burying a protective cylinder; c, preparing sludge; d, putting the spin-digging drilling rig in place; e, drilling holes; f, checking and accepting finished holes and conducting the conversional cast-in-place pile construction procedure of subsequently putting down a reinforcement cage for pouring concrete. The method has the advantages that construction steps are reasonable in design and easy to operate, the spin-digging drilling rig can effectively drill in the five special stratums including the sand stratum, the clay stratum, the broken pebble stone stratum, the hard rock stratum and the sludge stratum, construction efficiency is improved, the special stratums can be prevented from special processing, no special devices need to be arranged, project cost is saved, hole collapse and other quality problems are effectively avoided, and the quality of the finished holes is ensured.

Description

technical field [0001] The invention relates to a pile hole-forming construction method, in particular to a rotary-drilling pile-hole-forming construction method in special formations such as sand layer, clay layer, crushed pebble layer, hard rock and silt by a rotary drilling rig. Background technique [0002] Rotary digging hole-forming cast-in-situ pile is a newly developed hole-forming method, which has been rapidly popularized because of its wide applicability, high construction efficiency and high degree of mechanization. my country has a vast territory with complex and diverse strata. The rotary excavator is very efficient in general clay layers, silt layers, and strongly weathered rock layers, and the construction difficulty is relatively low, but if it encounters silt, sand layers, slippery clay layers, and hard rock layers Rotary excavation construction will also encounter many difficulties. [0003] Therefore known rotary digging hole-forming technology exists a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/38
Inventor 蒋伟沈霞李仙鹤李红林蒲伏华
Owner MCC5 GROUP CORP SHANGHAI
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