CN204663561U - A kind of large deformation hollow self-feeding anchor pile - Google Patents

A kind of large deformation hollow self-feeding anchor pile Download PDF

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Publication number
CN204663561U
CN204663561U CN201520370680.6U CN201520370680U CN204663561U CN 204663561 U CN204663561 U CN 204663561U CN 201520370680 U CN201520370680 U CN 201520370680U CN 204663561 U CN204663561 U CN 204663561U
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CN
China
Prior art keywords
sleeve pipe
hollow bolt
hollow
resistance sleeve
strength
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201520370680.6U
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Chinese (zh)
Inventor
徐开山
吕连勋
杜贻腾
陈佃浩
尚黎明
段会玲
吴帅
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Shandong University of Science and Technology
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Shandong University of Science and Technology
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Application filed by Shandong University of Science and Technology filed Critical Shandong University of Science and Technology
Priority to CN201520370680.6U priority Critical patent/CN204663561U/en
Application granted granted Critical
Publication of CN204663561U publication Critical patent/CN204663561U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of large deformation hollow self-feeding anchor pile, it mainly comprises hollow bolt body, resistance sleeve pipe, high-strength drill bit and backing plate, wherein said hollow bolt body is that threaded smooth hollow steel tube is established at two ends, anchor bar body surface is provided with even extravasating hole, can realize the full slip casting around anchor bar body; Described resistance sleeve pipe is high-strength alloy sleeve pipe, its external surface is provided with external screw thread, inner surface is provided with internal thread, the maximum outside diameter of resistance sleeve pipe is less than the diameter of high-strength drill bit, and be greater than the external diameter of hollow bolt body, two sections of hollow bolt bodies link into an integrated entity by resistance sleeve pipe, and hollow bolt body two ends external thread length is greater than the internal thread length of high-strength resistance sleeve pipe.The utility model can realize slip casing by pressure, improve construction quality, when country rock generation large deformation, can reduce or avoid the generation of anchor bar body tensile phenomenon, reach the object of long-term supporting, the supporting of the bad geological section such as weak surrounding rock, fault belt can be widely used in.

Description

A kind of large deformation hollow self-feeding anchor pile
Technical field
The utility model relates to Anchorage Technology field, is specifically related to a kind of large deformation hollow self-feeding anchor pile, is particularly useful for the reinforcing of the complex geological condition such as weak surrounding rock, fault belt.
Background technology
At present, along with engineering construction particularly the developing rapidly of underground engineering construction, in the engineering constructions such as tunnel, roadway surrounding rock and slope retaining, the requirement of anchor pole is increased day by day.When running into the unfavorable geological conditions such as fault belt, adopting first shaping anchor hole to squeeze into the form of construction work of bolt grouting again, easily occurring collapse hole phenomenon, cause into porosity lower.In addition, anchor pole during insertion, owing to being subject to complexing action power, is difficult to keep linear state, makes anchor pole be difficult to insert anchor hole.Now can adopt self-feeding anchor pile, namely anchor pole is with drill bit, as the anchor bar body of drilling rod without the need to extracting.
Hollow bolt is anchor bar body hollow and can be used as the anchor pole of Grouting Pipe, carry out slip casting from the inside to the outside during slip casting, when grouting pressure is larger, slurries penetrate in crack by anchor hole, thus reinforce adjoining rock, extract because of Grouting Pipe the slurries caused when avoiding conventional anchor construction and run off.Engineering practice proves, in the country rock that geological conditions is good, ordinary hollow anchor pole can meet the stability requirement to surrounding rock supporting, but under the complex geological condition such as weak surrounding rock, fault belt, when country rock or tomography are subjected to displacement, larger distortion can be produced, now ordinary hollow anchor pole then cannot suitable for surrounding rock large deformation and be easily pulled off.
Summary of the invention
The purpose of this utility model is to provide a kind of large deformation hollow self-feeding anchor pile, this anchor pole can pierce voluntarily under the complex geological condition such as weak surrounding rock, fault belt, and can effectively avoid anchor bar body to be pulled off when country rock or tomography are subjected to displacement and produce large deformation.
The realization of the utility model object is completed by following technical scheme: a kind of large deformation hollow self-feeding anchor pile, form primarily of hollow bolt body, resistance sleeve pipe, high-strength drill bit and backing plate, wherein said hollow bolt body is that threaded smooth hollow steel tube is established at two ends, anchor bar body surface is provided with even extravasating hole, can realize the full slip casting around anchor bar body; Described resistance sleeve pipe is high-strength alloy sleeve pipe, its external surface is provided with external screw thread, inner surface is provided with internal thread, the maximum outside diameter of resistance sleeve pipe is less than the diameter of high-strength drill bit, and be greater than the external diameter of hollow bolt body, two sections of hollow bolt bodies link into an integrated entity by resistance sleeve pipe, and hollow bolt body two ends external thread length is greater than the internal thread length of high-strength resistance sleeve pipe.
The beneficial effects of the utility model are: when the bad geological section such as weak surrounding rock, fault belt is constructed, anchor pole can pierce voluntarily, and when the country rock between two described resistance sleeve pipes or tomography are subjected to displacement and produce large deformation, because anchor rod body is more smooth, between adjacent two resistance sleeve pipes, the adhesion stress of anchor bar body or active force disappear, add the effective length of anchor bar body distortion, thus avoid anchor pole to be pulled off.Anchor bar body hollow can realize slip casing by pressure simultaneously, makes mortar can wrap up anchor bar body total length, improves construction quality, reaches the object of long-term supporting.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of large deformation hollow of the utility model self-feeding anchor pile.
Fig. 2 is the structural representation of the utility model hollow bolt body.
Marginal data: 1-plugging valve, 2-nut, 3-backing plate, 4-stop grouting plug, 5-hollow bolt body, 6-resistance sleeve pipe, the high-strength drill bit of 7-, 8-extravasating hole, 9-external screw thread, 10-screw thread.
Detailed description of the invention
Content elaborates to detailed description of the invention of the present utility model by reference to the accompanying drawings below.
As shown in Figure 1, a kind of large deformation hollow self-feeding anchor pile described in the utility model, form primarily of hollow bolt body 5, resistance sleeve pipe 6, high-strength drill bit 7 and backing plate 3, wherein high-strength drill bit 7 is high-strength carbide drill, be bolted integral with hollow bolt body 5, hollow bolt body 5 surface is provided with even extravasating hole 8.Two adjacent hollow anchor bar bodies 5 are connected by resistance sleeve pipe 6, resistance sleeve pipe 6 is high-strength alloy sleeve pipe, and its external surface is provided with external screw thread 9, and inner surface is provided with internal thread, resistance sleeve pipe 6 external diameter is extremely identical with hollow bolt body 5 external diameter by maximum gradual change, and is linked into an integrated entity by two sections of hollow bolt bodies 5.Rockbolt packer 4 is the auxiliary part that rubber or plastics are made, and can improve grouting effect and block grouting liquid to prevent it from flowing out aperture.Anchor pole afterbody is provided with backing plate 3, nut 2 and plugging valve 1 successively, in case slurries fall outside effuser in slip casting process.
Construction technology of the present utility model comprises the following steps:
(1) high-strength drill bit 7 is connected with hollow bolt body 5, and the hollow bolt body 5 of required joint number is linked into an integrated entity with resistance sleeve pipe 6;
(2) rig is utilized the anchor pole connected to be drilled to section by section designated depth and to use stop grouting plug 4, backing plate 3, nut 2 fixing anchor bar successively;
(3) therefrom the exposed junction of the spare anchor body of rod 5 carries out high-pressure slip-casting, utilizes plugging valve 1 to carry out shutoff after slip casting.
In described step (1), hollow bolt body 5 in a pre-installation, should check that whether its mesopore is unimpeded, and whether extravasating hole 8 is intact, if there is foreign matter to need cleaning in time.
In described step (2), in anchor pole drilling process, resistance sleeve pipe 6 follows up until reach desired depth with hollow bolt body 5 whole process.Described stop grouting plug 4 is high-performance stop grouting plug, the grouting pressure that injecting cement paste keeps stronger can be made, filling space fully, fixing fragmented rock body, simultaneously deep-level country rock stress equilibrium can be delivered on perisporium country rock by the arch backing plate 3 of high strength, nut 2, reaches the object of country rock and anchor pole supporting each other.
In described step (3), before hollow bolt body 5 slip casting, need carry out blowpipe to it, remove the dust produced in rock drilling process, during slip casting, slurries are sprayed by hollow bolt from high-strength drill bit 7 and overflow from extravasating hole 8, install plugging valve 1, prevent slurries from flowing backwards.Slurries fill the crack around anchor bar body, make anchor pole and surrounding Rock And Soil condense into one, play the effect of its support reinforcement country rock.The fastening nut when cement slurry reaches some strength.

Claims (1)

1. a large deformation hollow self-feeding anchor pile, form primarily of hollow bolt body, resistance sleeve pipe, high-strength drill bit and backing plate, it is characterized in that, described hollow bolt body is that threaded smooth hollow steel tube is established at two ends, anchor bar body surface is provided with even extravasating hole, can realize the full slip casting around anchor bar body; Described resistance sleeve pipe is high-strength alloy sleeve pipe, its external surface is provided with external screw thread, inner surface is provided with internal thread, the maximum outside diameter of resistance sleeve pipe is less than the diameter of high-strength drill bit, and be greater than the external diameter of hollow bolt body, two sections of hollow bolt bodies link into an integrated entity by resistance sleeve pipe, and hollow bolt body two ends external thread length is greater than the internal thread length of high-strength resistance sleeve pipe.
CN201520370680.6U 2015-06-02 2015-06-02 A kind of large deformation hollow self-feeding anchor pile Expired - Fee Related CN204663561U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520370680.6U CN204663561U (en) 2015-06-02 2015-06-02 A kind of large deformation hollow self-feeding anchor pile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520370680.6U CN204663561U (en) 2015-06-02 2015-06-02 A kind of large deformation hollow self-feeding anchor pile

Publications (1)

Publication Number Publication Date
CN204663561U true CN204663561U (en) 2015-09-23

Family

ID=54133953

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520370680.6U Expired - Fee Related CN204663561U (en) 2015-06-02 2015-06-02 A kind of large deformation hollow self-feeding anchor pile

Country Status (1)

Country Link
CN (1) CN204663561U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105863697A (en) * 2016-05-18 2016-08-17 重庆大学 Tensile break resistant energy-absorbing anchor rod

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105863697A (en) * 2016-05-18 2016-08-17 重庆大学 Tensile break resistant energy-absorbing anchor rod

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150923

Termination date: 20160602