Pile-spraying rotary construction method using tide difference subsection pile-formation

A construction method and technology of rotary grouting piles, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve problems such as grout running, hole collapse, grout leakage, etc., and achieve good technical and economic effects

Inactive Publication Date: 2012-06-06
QINGJIAN GRP CO LTD +1
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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a construction method of rotary grouting piles using tidal difference to form piles in sections, which can solve the problem of slurry leakage when high-pressure rotary grouting piles form holes in offshore highly permeable gravel and riprap layers , hole collapse, and grout running during high-pressure grouting, successfully completed the high-pressure rotary grouting pile

Method used

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  • Pile-spraying rotary construction method using tide difference subsection pile-formation
  • Pile-spraying rotary construction method using tide difference subsection pile-formation

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Embodiment 1

[0011] Please refer to the attached drawing of the instruction manual, a construction method of rotary grouting piles using tidal difference to form piles in sections. The whole pile is divided into 3 sections to complete. Section II piles are also completed by one-time jet spraying; Section III piles between section I piles and section II piles are gradually completed using the time of tide level changes.

[0012] Specific steps are as follows:

[0013] 1) Before the high tide, complete the section I pile at the lowest tide level, and stop the rotary spraying when the high tide water level reaches the rotary spraying position, so as to prevent the cement slurry from being taken away by sea water;

[0014] 2), at this time, adjust the nozzle to the soil layer with poor water permeability in the upper part of the highest tide level, and complete the rotary spraying of the II section pile;

[0015] 3), when the tide level drops below the top of the I section pile, immediately f...

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Abstract

The invention discloses a construction method of a rotary grouting pile using a tidal difference to sectionally form a pile, which is characterized in that the whole pile is completed through that the pile is divided into three segments, the first step is that the I segment pile on a lowest tidal level is completed in one time before rising tide, the II segment pile which is higher than the highest tidal lever is completed in one time through rotationally grouting, the III segment pile which is arranged between the I segment pile and the II segment pile is completed step by step using the time of the changing of the tidal level. The rotary grouting pile technology which is used by the invention uses the tidal difference to sectionally forming pile is capable of successfully solving the technical problems that a high-pressure rotary grouting pile gravels stone in a high permeability near the sea and forms holes in a riprap layer, thereby guaranteeing the rotary grouting pile to smoothly form the pile under the conditions of complex geological conditions near the sea, and the construction method of the rotary grouting pile has excellent technical and economic effects.

Description

technical field [0001] The invention relates to an underground engineering foundation pit support technology, in particular to a method for forming holes in offshore high-permeable gravel and riprap layers with high-pressure rotary grouting piles. Background technique [0002] The geological conditions in the coastal area are complex, with both natural sedimentary rock and soil layers and backfilled miscellaneous fill soils containing gravel and riprap with strong water permeability; the bedrock surface is undulating; the groundwater level is seriously affected by seawater, and some The groundwater in the region even directly connects with the seawater; the main technical problems encountered in excavating the foundation pit under such complex geological conditions are: ①The groundwater directly connects with the seawater, and it is impossible to implement the foundation pit excavation with the drainage scheme; The choice of water curtain scheme is greatly affected by geolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/46
Inventor 张同波刘海军
Owner QINGJIAN GRP CO LTD
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