Composite bamboo rib combined bolting and shotcrete support for foundation pit supporting and construction method of composite bamboo rib combined bolting and shotcrete support

A foundation pit support and shotcrete anchor support technology, which is applied in the direction of foundation structure engineering, excavation, sheet pile walls, etc., can solve the problems of high investment and inability to ensure the stability of the foundation pit slope, and achieve low construction cost and low construction cost. Green environmental protection, large surface area effect

Inactive Publication Date: 2013-10-23
WUXI DAZHU GEOTECHN TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The distribution of surface soil layers in the eastern part of my country is that the upper soil quality is better, generally clay or sub-clay, and the lower layer has a soft bed layer. When the foundation pit reaches a certain depth, the use of ordinary soil nail wall support structure cannot guarantee the foundation pit edge. slope stability
The traditional retaining pile support system (such as cast-in-situ pile plus internal support, etc.) requires a high investment

Method used

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  • Composite bamboo rib combined bolting and shotcrete support for foundation pit supporting and construction method of composite bamboo rib combined bolting and shotcrete support
  • Composite bamboo rib combined bolting and shotcrete support for foundation pit supporting and construction method of composite bamboo rib combined bolting and shotcrete support
  • Composite bamboo rib combined bolting and shotcrete support for foundation pit supporting and construction method of composite bamboo rib combined bolting and shotcrete support

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as Figure 1-3 Shown, a kind of foundation pit support is supported with composite bamboo reinforcement spray anchor, comprises foundation pit 7, and described foundation pit 7 is made up of several groups of upper layer soil body 8, platform 11 and lower layer soil body 9, and platform 11 is positioned at upper layer soil body Between the body 8 and the lower soil body 9; a deep mixing pile 1 is arranged in the platform 11, and the surface of the foundation pit 7 is covered with a layer of first concrete panel 2-1;

[0032] The first concrete panel 2-1 is provided with several through holes 10, and a bamboo anchor rod 3 is inserted in each through hole 10; a layer of bamboo reinforcement net 4 is arranged around each bamboo anchor rod 3; The bamboo reinforcement net 4 is fixed on the first concrete panel 2-1 by a plurality of bamboo nails 5; a second concrete panel 2-2 is laid above the bamboo reinforcement net 4.

[0033] The tail end of the bamboo anchor rod 3 ...

Embodiment 2

[0037] The construction method of composite bamboo reinforcement sprayed anchor support for described foundation pit support, the steps are as follows:

[0038] (1) Construction of deep mixing piles: The construction of deep mixing piles in soft lying soil layer is as follows:

[0039] a. Level the soil layer to be constructed, and carry out technical test piles, the number of which shall not be less than 3;

[0040] b. The mixer is installed in place, the deviation of the pile position is not more than 20mm, the guide frame and the stirring shaft should be perpendicular to the ground, and the verticality deviation is not more than 1.5%;

[0041] c. After pre-stirring and sinking to the design reinforcement depth, spray concrete slurry while stirring and lift to the predetermined slurry stop surface;

[0042] d. Repeated drilling and stirring meet the design requirements;

[0043] e. Lift the mixing equipment and shut down the machinery;

[0044] That is, the processed deep...

Embodiment 3

[0051] First, carry out the construction of deep mixing pile 1 in the soft lying soil layer, and then excavate the upper layer of soil 8 along the mixing pile 1 according to the slope ratio of not less than 1:1, and then initially spray 30mm thick on the excavated soil Spray the first concrete panel 2-1, and then drill anchor holes. The hole spacing is generally between 1-2m, the hole diameter is between 50-100mm, and the downward angle of the hole is generally in the range of 0-20°. Enter the bamboo anchor rod 3 that has been set with the iron wire locator 7, and then inject cement slurry, whose strength is not less than M10. Lay bamboo reinforcement net 4 again, and the grid pitch of bamboo reinforcement 4 is generally about 250mm, and is fixed on the first concrete panel 2-1 of initial spraying with bamboo nail 5. Then insert two 20cm long ф10 steel bars 6 in the reserved holes at the end of the bamboo anchor rod 3, and bind and fix with the bamboo reinforcement net 4. Fin...

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Abstract

The invention relates to a composite bamboo rib combined bolting and shotcrete support for foundation pit supporting and a construction method of the composite bamboo rib combined bolting and shotcrete support, and belongs to the technical field of municipal construction. Firstly, deep mixed piles are used for soil stabilization construction, then, excavation is conducted in a layered mode, and a bamboo rib anchoring and shotcreting structure is arranged on a soil body with a certain gradient. The bamboo rib anchoring and shotcreting structure comprises a panel, and further comprises bamboo anchor rods, bamboo ribs, bamboo nails, short steel bars and the like. Holes are transversely drilled in the tail portions of the bamboo anchor rods, and the two phi 10 steel bars which are 20cm long are installed in the holes to form a whole with the panel. The composite bamboo rib combined bolting and shotcrete support for foundation pit supporting and the construction method of the composite bamboo rib combined bolting and shotcrete support have the advantages of being low in construction cost and environmentally friendly, and are suitable for being used in regions where soil layer conditions are poor.

Description

technical field [0001] The invention relates to a composite bamboo reinforcement spray anchor support for foundation pit support and a construction method thereof, belonging to the technical field of municipal construction. Background technique [0002] The distribution of surface soil layers in the eastern part of my country is that the upper soil quality is better, generally clay or sub-clay, and the lower layer has a soft bed layer. When the foundation pit reaches a certain depth, the use of ordinary soil nail wall support structure cannot guarantee the foundation pit edge. The slope is stable. The investment of traditional retaining pile support system (such as cast-in-situ pile plus internal support, etc.) is relatively high. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned disadvantages, and provide a composite bamboo-reinforced anchor-spray support structure with low construction cost and suitable for use in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04E02D5/76
Inventor 张军阳陆英
Owner WUXI DAZHU GEOTECHN TECH
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