CN203808066U - PHA anchor rod - Google Patents

PHA anchor rod Download PDF

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Publication number
CN203808066U
CN203808066U CN201420190280.2U CN201420190280U CN203808066U CN 203808066 U CN203808066 U CN 203808066U CN 201420190280 U CN201420190280 U CN 201420190280U CN 203808066 U CN203808066 U CN 203808066U
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China
Prior art keywords
anchoring
pha
prefabricated
slurry
anchor rod
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CN201420190280.2U
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Chinese (zh)
Inventor
周同和
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Zhengzhou University Multi-Functional Design and Research Academy Co., Ltd.
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周同和
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Abstract

The utility model discloses a PHA anchor rod and belongs to the technical field of supporting. The PHA anchor rod comprises an anchor rod body sleeved with a prefabricated tubular outer anchoring body. The PHA anchor rod can be formed according to the steps that (1) a hole is formed; (2) prefabricated tubular outer anchoring body is jacked into the hole and then a steel sleeve continues to be jacked in the outer end of the prefabricated tubular outer anchoring body; (3) the anchor rod body is embedded in the prefabricated tubular outer anchoring body, high-grade cement slurry or cement mortar is poured, and the steel sleeve is pulled out after pouring is finished; (4) slurry is replenished; (5) tensioning and locking are carried out. The outer anchoring body is a prefabricated part, can shorten the work time on spot, is higher than a cast-in-place anchoring body in strength and is not prone to cracking or being damaged. The PHA anchor rod does not need to be taken out after being embedded and is convenient to construct and good in effect. The prefabricated outer anchoring body is tightly combined with soil in the hole, so that gaps are prevented from being formed between the slurry and the soil after the slurry retracts. The whole slurry pouring process is carried out inside the outer anchoring body, the secondary splitting slurry pouring process is not adopted, and disturbance on the soil is reduced.

Description

A kind of PHA anchor pole
Technical field
The utility model belongs to support technology field, is specifically related to a kind of PHA anchor pole (prefabricated High strength bolt).
Background technology
No matter be for the earth's surface such as side slope, foundation ditch engineering or to the underground chamber such as tunnel, stope, bolt support is all a kind of very conventional its support reinforcement mode.Existing anchor pole is made up of parts such as anchor head, the body of rod, stop grouting plug, backing plate, nuts conventionally, coordinates form anchoring system in construction with cast-in-place anchoring body, and its construction process is as follows:
(1) plant equipment and material enter job site;
(2) anchor hole location;
(3) rig pore-forming or utilize casing pipe hole forming;
(4) clear hole;
(5) anchor pole is implanted in hole, and setting and anchor pole two pipelines side by side;
(6) toward a pressure pouring cement mortar in anchor hole, cast limit, limit detaches a wherein Grouting Pipe (should extract sleeve pipe in slip casting while utilizing casing pipe hole forming simultaneously, both increased difficulty of construction, can affect again construction effect), percolating water in anchor hole is flowed out, until cement mortar is filled whole anchor hole along this pipeline;
(7) after slurry initial set, in another pipeline, carry out secondary pressure slip casting, fill up the space forming after once-cast initial set;
(8) slurry is mended in the contraction producing for cement paste after secondary grouting;
(9) after reaching designing requirement, slurry intensity carries out tensioning fixation;
(10) cement mortar length of time to after detect.
Generally use although above-mentioned technique is existing, but still have following problem:
1) no matter adopt cement mortar or cement paste pours into, all can produce larger amount of contraction, solidifying rear actual filling volume is negative, therefore, between cast-in-place anchoring body and hole wall, exist the frictional force between gap and the soil body to reduce, meanwhile, underground water is easily clamp-oned gap, further reduces the frictional force between anchor pole and hole wall.
2) secondary splitting grouting technique can cause very large disturbance to the soil body, while application, can cause the sedimentation of the foundation ditch periphery soil body in base pit engineering, even causes periphery house, road cracking.
3) after once grouting initial set, can carry out secondary grouting, after injecting cement paste intensity reaches designing requirement, can carry out tensioning fixation, the construction period is longer.
Therefore,, in the urgent need to developing a kind of novel anchor rod, to change existing construction technology, thoroughly address the above problem.
Summary of the invention
The purpose of this utility model is for a kind of easy construction, anchor pole that intensity is higher are provided.
Based on above-mentioned purpose, the utility model has been taked following technical scheme: a kind of PHA anchor pole, comprise bolt body, and described bolt body is arranged with the outer anchoring body of prefabricated pipe shape outward.
The outer anchoring body of described prefabricated tubulose is formed by connecting by multistage, engages fixing between each adjacent segment by adapter sleeve.
The outer every segment length 1~1.6m of anchoring body of described prefabricated tubulose.
The outer anchoring body wall thickness 25mm~40mm of described prefabricated tubulose, external diameter is 150~180mm.
This anchor pole can have been constructed by following step: (1) pore-forming; (2) the outer anchoring body of the prefabricated tubulose of jacking, then outside prefabricated tubulose, jacking steel sleeve is continued in anchoring body outer end; (3) outside prefabricated tubulose, in anchoring body, implant bolt body, perfusion high-mark cement slurry or cement mortar, extract steel sleeve after having poured into; (4) mend slurry; (5) tensioning fixation.
For guaranteed strength, in the outer anchoring body employing of the prefabricated tubulose C80 concrete in the utility model, join cold-drawn low-carbon wire and be made; Being designed to multi-segment structure, is mainly to consider transport and easy construction.
Compared with common bolt, the PHA anchor pole that the utility model provides has following technical advantage:
1) outer anchoring body is prefabricated units, after buying, can directly use, and can significantly shorten man-hour;
2) prefabricated outer anchoring body is higher with cast-in-place anchoring body phase specific strength, is not easy to occur cracking destruction phenomenon;
3) outer anchoring body implant after without taking-up, easy construction and effective;
4) prefabricated outer anchoring body soil body in hole is combined closely, has avoided after common bolt slip casting because slurry shrinks the gap that forms between the soil body;
5) PHA bolt grouting all occurs in outer anchoring body inside, does not adopt secondary splitting grouting technique, has reduced the disturbance to the soil body.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model PHA anchor pole.
Detailed description of the invention
Below in conjunction with specific embodiment, utility model is described further.
embodiment 1
A kind of PHA anchor pole, as shown in Figure 1, comprises bolt body 4, the outer outer anchoring body 1 of prefabricated pipe shape that is arranged with of bolt body 4.The wall thickness of the outer anchoring body 1 of prefabricated tubulose is that 25mm, external diameter are 150, is formed by connecting by multistage, and every segment length 1.5m, engages fixing by adapter sleeve 3 between each adjacent segment.
Its construction method comprises the following steps:
(1) pore-forming: adopt built-in auger stem operation to fetch earth and creep into, form and draw hole;
(2) the outer anchoring body 1 of the prefabricated tubulose of jacking, then outside prefabricated tubulose, jacking steel sleeve is continued in anchoring body 1 outer end;
(3) outside prefabricated tubulose, in anchoring body 1, implant bolt body 4, perfusion high-mark cement slurry or cement mortar 2, extract steel sleeve after having poured into;
(4) mend slurry;
(5) tensioning fixation.
The present embodiment employing is drawn hole plunging and is implanted the outer anchoring body 1 of prefabricated tubulose, and its work progress is simple, and outer anchoring body 1 is high with the bond strength of surrounding soil, is particularly useful for Soft Soil Layer under groundwater table.
embodiment 2
A kind of PHA anchor pole, as shown in Figure 1, comprises bolt body 4, the outer outer anchoring body 1 of prefabricated pipe shape that is arranged with of bolt body 1.The wall thickness of the outer anchoring body 1 of prefabricated tubulose is that 40mm, external diameter are 180mm, is formed by connecting by multistage, and every segment length 1.5m, engages fixing by adapter sleeve 3 between each adjacent segment.
Its construction method comprises the following steps:
(1) pore-forming: injected water mud off when adopting auger stem boring, injects low strength cement slurry when rod pulling;
(2) the outer anchoring body 1 of the prefabricated tubulose of jacking, then outside prefabricated tubulose, jacking steel sleeve is continued in anchoring body 1 outer end;
(3) outside prefabricated tubulose, in anchoring body 1, implant bolt body 4, perfusion high-mark cement slurry or cement mortar 2, extract steel sleeve after having poured into;
(4) mend slurry;
(5) tensioning fixation.
The present embodiment adopts slip casting implantation to implant the outer anchoring body 1 of prefabricated tubulose, and retaining wall cement paste can also play the effect of the binding strength of strengthening outer anchoring body 1 and surrounding soil simultaneously, especially applicable to clay, silt and more closely knit layer of sand.
embodiment 3
A kind of PHA anchor pole, as shown in Figure 1, comprises bolt body 4, the outer outer anchoring body 1 of prefabricated pipe shape that is arranged with of bolt body 4.The wall thickness of the outer anchoring body 1 of prefabricated tubulose is that 30mm, external diameter are 160mm, is formed by connecting by multistage, and every segment length 1.5m, engages fixing by adapter sleeve 3 between each adjacent segment.
Its construction method comprises the following steps:
(1) pore-forming: adopt the boring of umbrella shape drilling tool, creep into the displacement of the water filling simultaneously soil body;
(2) the outer anchoring body 1 of the prefabricated tubulose of jacking and steel sleeve successively when rig creeps into, rod pulling pour into low strength cement and starch after anchoring body 1 arrives precalculated position prefabricated tubulose outside, can carry out churning reaming while needing bellend;
(3) outside prefabricated tubulose, in anchoring body 1, implant bolt body 4, perfusion high-mark cement slurry or cement mortar 2, extract steel sleeve after having poured into;
(4) mend slurry;
(5) tensioning fixation.
The present embodiment adopts drilling follow pipe method to implant outer anchoring body 1, can prevent in drilling process that hole wall collapse or quicksand fill boring, are applicable to scall and drifting sand layer.

Claims (4)

1. a PHA anchor pole, comprises bolt body, it is characterized in that, described bolt body is arranged with the outer anchoring body of prefabricated pipe shape outward.
2. PHA anchor pole as claimed in claim 1, is characterized in that, the outer anchoring body of described prefabricated tubulose is formed by connecting by multistage, engages fixing between each adjacent segment by adapter sleeve.
3. PHA anchor pole as claimed in claim 2, is characterized in that, the outer every segment length 1~1.6m of anchoring body of described prefabricated tubulose.
4. the PHA anchor pole as described in as arbitrary in claim 1-3, is characterized in that, the outer anchoring body wall thickness 25~40mm of described prefabricated tubulose, and external diameter is 150~180mm.
CN201420190280.2U 2014-04-18 2014-04-18 PHA anchor rod Active CN203808066U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420190280.2U CN203808066U (en) 2014-04-18 2014-04-18 PHA anchor rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420190280.2U CN203808066U (en) 2014-04-18 2014-04-18 PHA anchor rod

Publications (1)

Publication Number Publication Date
CN203808066U true CN203808066U (en) 2014-09-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420190280.2U Active CN203808066U (en) 2014-04-18 2014-04-18 PHA anchor rod

Country Status (1)

Country Link
CN (1) CN203808066U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103911993A (en) * 2014-04-18 2014-07-09 周同和 PHA (preliminary hazard analysis) anchor rod and construction method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103911993A (en) * 2014-04-18 2014-07-09 周同和 PHA (preliminary hazard analysis) anchor rod and construction method thereof
CN103911993B (en) * 2014-04-18 2016-05-04 周同和 A kind of PHA anchor pole and construction method thereof

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: GUAN GANG

Free format text: FORMER OWNER: ZHOU TONGHE

Effective date: 20150828

Owner name: ZHENGZHOU UNIVERSITY MULTI-FUNCTIONAL DESIGN AND R

Effective date: 20150828

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20150828

Address after: 450002 No. 48, Wenhua Road, Henan, Zhengzhou

Patentee after: Guan Gang

Patentee after: Zhengzhou University Multi-Functional Design and Research Academy Co., Ltd.

Address before: 450002 No. 50, Wenhua Road, Henan, Zhengzhou

Patentee before: Zhou Tonghe