CN201172823Y

CN201172823Y - Exhausting multiplex anti-corrosive anchor rod

Info

Publication number: CN201172823Y
Application number: CNU2008200618273U
Authority: CN
Inventors: 牛建文; 吴航
Original assignee: CHENGDU MODERN WANTONG ANCHOR TECHNOLOGY Co Ltd
Current assignee: CHENGDU MODERN WANTONG ANCHOR TECHNOLOGY Co Ltd
Priority date: 2008-01-17
Filing date: 2008-01-17
Publication date: 2008-12-31
Anticipated expiration: 2018-01-17

Abstract

The utility model relates to an exhaust-type multiple anti-corrosion anchor rod, which comprises an anchor head, a solid anchor rod body, a cannula which is sleeved on the solid anchor rod body, a hollow anchor rod body, a stop grouting plug and a connecting sleeve which is spirally connected with the solid anchor rod body and the hollow anchor rod body, wherein a slurry outlet channel which is communicated with the inner cavity of the hollow anchor rod body and an airway which is communicated with a cavity between the solid anchor rod body and the cannula are arranged in the connecting sleeve, one end of an exhaust pipe is communicated with the airway, and the other end is extended out of the stop grouting plug. Zinc layers are coated on the cannula, a grouting soil and an anchor rod body surface, or plastic is coated on the anchor rod to form multiple anti-corrosion protections. The utility model has the advantages of long service, full slurry filling and high engineering quality, which especially solves the exhausting problem when in upwards grouting.

Description

Vented multiple-anticorrosion anchor rod

Technical field

The utility model relates to geotechnical engineering anchoring support utensil, particularly can exhaust when slip casting, grouted anchor bar with multiple-anticorrosion function, be applicable to the earth formation anchoring support of engineerings such as underground construction, mine Jing Dong, tunnel and side slope, especially can solve the problem of exhaust in the mortar depositing construction that makes progress.

Background technology

In geotechnical engineering constructions such as underground construction, mine working, railway tunnel and side slope, for the major technique measure that prevents stratum deformation, subsides, unstability is reinforced the stratum is to adopt anchor pole.Pulling force by anchor pole in the stratum and with the incorporate concrete grouting body of anchor pole with stratum consolidation, form the globality stratum, thereby reach the purpose of control stratum deformation.And, require its life-span more than a century as a kind of anchor pole of permanent supporting.Therefore, the anticorrosion problem of anchor pole in the stratum is crucial.Chinese patent literature discloses a kind of grouted anchor bar with anticorrosive casing pipe (CN2830645Y), " is made up of anchor bar body, aperture linkage section, sleeve pipe, anchorage head, bearing plate, clamp nut, packing ring.Anchor bar body has sleeve pipe, an end and aperture linkage section threaded engagement, and the other end is connected with anchorage head; Sleeve pipe arranges along the anchor bar body y direction, and an end is connected on the same end face that the aperture linkage section is connected with anchor bar body; The other end extends near the anchorage head; The aperture linkage section is that one section part has thread inner surface and the short straight tube vertical communication hole, and an end cooperates with anchoring body, and the other end inwardly is furnished with nut, packing ring, bearing plate successively from its end face; The cavity of aperture linkage section and intercommunicating pore are communicated with the cavity of sleeve pipe, form the slip casting passage ".This scheme provides multiple-anticorrosion by sleeve pipe grouting reinforcement body for anchor pole, the durability and the application life of anchor pole are prolonged, but, the exhaust performance existing problems of this anchor pole when slip casting, especially certain inclination angle is being arranged, when particularly making progress slip casting, can not discharge air in the anchor hole smoothly, make the Cementer work be difficult to carry out.Be specifically, when along the slip casting of top rade direction, slurry channel is: the cavity → anchor hole front end between Grouting Pipe (being hollow bolt) → linkage section → anchor bar body (being solid anchor bar body) and the sleeve pipe, owing to the gravity reason, mortar is the filling of backing plate position from the anchor hole front end to the anchor hole rear end at first, therefore, steam vent on the backing plate and anchor hole leading portion are blocked, grouting operation can't be proceeded, cause the interior slurry placement of anchor hole discontented, have a strong impact on anchoring quality.

The utility model content

Task of the present utility model provides a kind of vented multiple-anticorrosion anchor rod, with the problem of the reliable exhaust of energy in the solution slurry placement process, the especially exhausting problem when making progress slip casting.

This novel task is realized by the following technical programs: a kind of vented multiple-anticorrosion anchor rod, comprise anchor head, solid anchor bar body, be enclosed within the sleeve pipe on the solid anchor bar body, the hollow bolt body, stop grouting plug, also has the adapter sleeve that is connected with hollow bolt body spiral with described solid anchor bar body, have the pulp passage that is communicated with the hollow bolt intracoelomic cavity in the adapter sleeve and have with solid anchor bar body and sleeve pipe between the air flue that is connected of cavity, stack one end is communicated with air flue, and the other end stretches out beyond the stop grouting plug.

When using this bolt grouting, slurry channel is as follows: the pulp passage → anchor hole back segment of hollow bolt inner chamber → adapter sleeve (contiguous anchor hole opening part, from the anchor hole back segment to the filling forward of anchor hole leading portion direction, at this moment, the air effect of being stressed in the anchor hole, perforate from anchor head enters in the cavity of sleeve pipe and solid anchor bar body, again from the air flue of adapter sleeve beyond stack is discharged stop grouting plug) → cavity between anchor hole leading portion (being full of whole anchor hole) → anchor head perforate → solid anchor bar body and the sleeve pipe (forms the grouting reinforcement body on solid anchor bar body surface, add sleeve pipe and constitute dual anticorrosive coat, with electrochemical corrosion and the heavily stressed corrosion that effectively prevents soil layer).

Compared with prior art, the beneficial effect of this novel anchor rod is:

1, CN2830645Y is to the filling of anchor hole back segment direction from the anchor hole leading portion, therefore, the requirement of exhaust when being difficult to adapt to upwards slip casting, and the slip casting of this novel anchor rod is to the filling gradually of anchor hole leading portion (being inner segment) direction (slurry outlet of adapter sleeve side is positioned at section outside the anchor hole) from anchor hole back segment (section promptly), thereby the exhausting problem when having solved upwards grouting filling effectively can carry out slurry placement smoothly.

In the slip casting process, the air in the anchor pole can be discharged effectively reliably, especially in slip casting upwards or when certain top rade mortar depositing construction is arranged, can discharge the air of anchor hole smoothly, reliably, thereby makes in the anchor hole slurry fills full, improves the anchoring construction quality.

2, the convenient fixing of stack, reliable.Integral body is provided with a tube coupling on the adapter sleeve external surface, and the air flue in tube coupling and the adapter sleeve is communicated with.During mortar depositing construction, stack can be inserted this tube coupling and connect, will pass the hole of stack outer end from stop grouting plug again.Because hollow grouting anchor mainly plays the slip casting effect, length can be shorter, and therefore, stack is also shorter, can not be affected when inserting anchor hole.

3, the zinc coat or the coating layer on sleeve pipe and grouting reinforcement body (the mortar induration in the cavity between hollow anchor bar body and the sleeve pipe) and anchor bar body surface form the multiple-anticorrosion barrier, prolonged the application life of anchor pole greatly, for permanent stratum support engineering as, the supporting of corrosion mine working, the seabed tunnel support engineering provides reliable anchoring utensil.

Description of drawings

Fig. 1 is this novel structure chart.

The specific embodiment

This novel anchor rod shown in Fig. 1 is installed in the situation on the anchor hole.Solid anchor bar body 2 front ends are connected with anchor head 1, and sleeve pipe 3 (being preferably waved plastic pipe) is enclosed within on the solid anchor bar body, and the two forms cavity.Perforate 1a on the anchor head is communicated with this cavity.Adapter sleeve 4 front ends and solid anchor bar body 2 spin, rear end and hollow bolt body 6 spin, be communicated with in the cover 4 and have the pulp passage 6a (adapter sleeve has slurry outlet on the side) that is communicated with hollow bolt body 6 inner chambers, and have with solid anchor bar body 2 and sleeve pipe 3 between the air flue 4a that is connected of cavity, stack 5 one ends are communicated with air flue 4a (on the adapter sleeve integrally, it is the integrated tube coupling that is provided with, tube coupling is communicated with air flue 4a, during slip casting, stack 5 is plugged on the tube coupling), the other end is beyond stop grouting plug 7 is stretched out in the hole on the stop grouting plug.Be provided with zinc-plated anticorrosive coat or resin anticorrosive coat on solid anchor bar body 2 and the hollow bolt body 6.Also be provided with backing plate 8 and nut 9 on the hollow bolt body 6.

Claims

1, a kind of vented multiple-anticorrosion anchor rod, comprise anchor head (1), solid anchor bar body (2), be enclosed within the sleeve pipe (3) on the solid anchor bar body, hollow bolt body (6), stop grouting plug (7), it is characterized in that: also have the adapter sleeve (4) that is connected with hollow bolt body (6) spiral with described solid anchor bar body (2), have the pulp passage (6a) that is communicated with the hollow bolt intracoelomic cavity in the adapter sleeve and have with solid anchor bar body and sleeve pipe (3) between the air flue (4a) that is connected of cavity, stack (5) one ends are communicated with air flue (4a), and the other end stretches out stop grouting plug (7) in addition.

2, according to the described vented multiple-anticorrosion anchor rod of claim 1, it is characterized in that: described adapter sleeve (4) is gone up the integrated tube coupling that is provided with, and tube coupling is communicated with air flue (4a), and stack (5) one ends are inserted on the tube coupling.

3, according to the described vented multiple-anticorrosion anchor rod of claim 2, it is characterized in that: described sleeve pipe (3) is a waved plastic pipe.

4, according to claim 1 or 2 or 3 described vented multiple-anticorrosion anchor rods, it is characterized in that: be provided with zinc-plated anticorrosive coat or resin anticorrosive coat on described solid anchor bar body (2) and the hollow bolt body (6).

5, according to the described vented multiple-anticorrosion anchor rod of claim 4, it is characterized in that: also be provided with backing plate (8) and nut (9) on the described hollow bolt body (6).