CN113446039A - Grouting type variable cross-section anchor pipe and soft rock tunnel surrounding rock grouting reinforcement construction method - Google Patents
Grouting type variable cross-section anchor pipe and soft rock tunnel surrounding rock grouting reinforcement construction method Download PDFInfo
- Publication number
- CN113446039A CN113446039A CN202110852055.5A CN202110852055A CN113446039A CN 113446039 A CN113446039 A CN 113446039A CN 202110852055 A CN202110852055 A CN 202110852055A CN 113446039 A CN113446039 A CN 113446039A
- Authority
- CN
- China
- Prior art keywords
- pipe
- section
- grouting
- special
- anchor
- 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.)
- Pending
Links
- 239000011435 rock Substances 0.000 title claims abstract description 35
- 238000010276 construction Methods 0.000 title claims abstract description 17
- 230000002787 reinforcement Effects 0.000 title claims abstract description 8
- 238000007569 slipcasting Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000011440 grout Substances 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims 1
- 238000004873 anchoring Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 9
- 239000002002 slurry Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 230000008093 supporting effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The utility model provides a variable cross section slip casting formula anchor pipe, includes the body, and body one end sets to coniform, and the slip casting mouth is seted up to the body other end, and the body includes a plurality of circle pipe sections and special-shaped pipe section, and circle pipe section and special-shaped pipe section interval set up and fixed connection, and the pipe diameter of circle pipe section and special-shaped pipe section is different, has all seted up out the thick liquid hole on the pipe wall of circle pipe section and special-shaped pipe section, goes out the inside intercommunication of thick liquid hole and body. Compared with the traditional common hollow anchor pipe, the drawing force can be improved by more than 8 times, and the anchor pipe with high bearing capacity is formed. The invention also relates to a soft rock tunnel surrounding rock grouting reinforcement construction method based on the variable cross-section grouting type anchor pipe, which can greatly improve the combination firmness degree of the anchor pipe and the surrounding rock, has good anchoring effect, and prevents the safety accidents of large deformation or collapse of the surrounding rock and the like.
Description
Technical Field
The invention relates to the technical field of grouting reinforcement equipment, in particular to a variable cross-section grouting type anchor pipe and a soft rock tunnel surrounding rock grouting reinforcement construction method.
Background
In mine tunnel construction, an anchor pipe is one of common supporting tools. The anchor pipe is used for reinforcing surrounding rocks around the tunnel, inhibiting the deformation of the surrounding rocks and fully exerting and improving the self bearing capacity of the surrounding rocks. According to the contact state with the surrounding rock, the anchor pipe can be generally divided into a variable cross-section grouting type anchor pipe and a friction type anchor pipe, the application of the existing variable cross-section grouting type anchor pipe is wide, the contact effect between the surrounding rock and the pipe body is enhanced mainly through grouting, the supporting function of the anchor pipe is enhanced by improving the adhesive strength and the shearing rigidity of the anchor pipe, and the effect of reinforcing the surrounding rock is further achieved.
At present, the construction of common mortar anchor pipes adopts a mode of grouting first and then inserting the anchor pipes, the adopted anchor pipes are steel pipes with common circular pipe structures, the steel pipes are influenced by anchoring materials and surrounding rock conditions, the adhesive force between the anchor pipes and the surrounding rock is limited, the anchoring effect is difficult to meet the bearing capacity under the condition of weak and broken surrounding rock, the surrounding rock is easy to deform, and even collapse accidents are caused. Therefore, the invention aims to improve the traditional anchor pipe and construction process so as to better meet the actual requirement.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a variable cross-section grouting type anchor pipe, so as to solve the problems in the background technology.
The technical problem solved by the invention is realized by adopting the following technical scheme:
the utility model provides a variable cross section slip casting formula anchor pipe, includes the body, and body one end sets to coniform, and the slip casting mouth is seted up to the body other end, and the body includes a plurality of circle pipe sections and special-shaped pipe section, and circle pipe section and special-shaped pipe section interval set up and fixed connection, and the pipe diameter of circle pipe section and special-shaped pipe section is different, has all seted up out the thick liquid hole on the pipe wall of circle pipe section and special-shaped pipe section, goes out the inside intercommunication of thick liquid hole and body. The pipe body is a hollow pipe body, so that the filling of the anchoring material can be ensured to be full, and the pressure grouting can be realized.
Furthermore, the surface of the special pipe section is sunken to form an arc surface groove structure.
Furthermore, the number of the cambered surface groove structures on the special-shaped pipe section is two, and the two cambered surface groove structures are arranged in parallel and are symmetrically arranged along the central axis of the special-shaped pipe section.
Further, the cambered surface groove structures on the adjacent special-shaped pipe sections are arranged in a staggered mode.
Further, the cambered surface groove structures on the adjacent special-shaped pipe sections are vertically arranged.
Furthermore, the pipe diameter corresponding to the position of the non-cambered groove structure on the special-shaped pipe section is larger than that of the round pipe section, and the pipe diameter corresponding to the position of the bottom of the cambered groove structure on the special-shaped pipe section is smaller than that of the round pipe section.
Furthermore, the ratio of the pipe diameter corresponding to the position of the non-cambered groove structure on the special-shaped pipe section to the pipe diameter corresponding to the position of the bottom of the cambered groove structure on the special-shaped pipe section is 1: 2-4.
Furthermore, the number of the slurry outlet holes is multiple, and the slurry outlet holes are uniformly distributed along the circumferential direction of the middle part of the circular pipe section or the special-shaped pipe section.
Further, the anchor pipe is a steel anchor pipe.
A soft rock tunnel surrounding rock grouting reinforcement construction method based on variable cross-section grouting type anchor pipes comprises the following steps:
1) drilling a hole in the surrounding rock;
2) inserting the anchor pipe into the drill hole to prepare for grouting;
3) the grout is formed by secondary grouting by adopting paste with the water cement ratio lower than 0.4, the first grouting adopts static pressure grouting, and the second grouting adopts split grouting;
4) and sealing the anchor pipe after grouting is finished.
Has the advantages that: the variable cross-section grouting type anchor pipe has a unique structure, the cross-sectional area of the anchor pipe is continuously changed by repeatedly combining the circular pipe section and the special-shaped pipe section, and the combination angle between the body of the anchor pipe and a grouting body is continuously changed, so that the contact area between the body of the anchor pipe and the grouting body is enlarged, the bonding strength between surrounding rocks, the grouting body and the anchor pipe is improved, the drawing force of the variable cross-section grouting type anchor pipe can be improved by more than 8 times compared with that of a traditional common hollow anchor pipe, and the anchor pipe with high bearing capacity is formed.
The construction method for reinforcing the surrounding rock of the soft rock tunnel based on the variable cross-section grouting type anchor pipe has the advantages that the construction operation is convenient, the grouting liquid is injected into the pipe body through the grouting port after the construction, and then is diffused into the surrounding rock through the grout outlet holes on the periphery of the pipe body, the construction is convenient, the mortar plumpness is high, the grouting amount and the grouting pressure are easy to control and adjust, the anchoring effect of the pipe body and the surrounding rock can be improved by improving the grouting pressure and increasing the grouting amount, the anchoring effect is good, and the safety accident problems of large deformation or collapse of the surrounding rock and the like are prevented. Meanwhile, the anchor pipe is fully filled and wrapped by the anchoring material in multiple angles, so that the corrosion of the anchor pipe can be reduced, the purpose of long-term support is achieved, and the durability of the support effect of the anchor pipe is improved.
Drawings
FIG. 1 is a front view of the preferred embodiment of the present invention.
Fig. 2 is a partial perspective view (i) of the preferred embodiment of the present invention.
Fig. 3 is a partial perspective view of the preferred embodiment of the present invention (ii).
Wherein: 1. a pipe body; 2. a grouting port; 3. a circular pipe section; 4. a special-shaped pipe section; 5. a cambered surface groove structure; 6. And (6) slurry outlet.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
This embodiment variable cross section slip casting formula anchor pipe, including body 1, the body is hollow structure, the coniform is set to 1 one end of body, slip casting mouth 2 is seted up to the 1 other end of body, slip casting mouth 1 and the inside intercommunication of body 1, body 1 includes a plurality of pipe sections 3 and special-shaped pipe section 4, pipe section 3 and 4 intervals of special-shaped pipe section set up and fixed connection, in this embodiment, pipe section 3 and 4 integrated into one piece of special-shaped pipe section, pipe section 3 and 4 pipe diameters of special-shaped pipe section are different, grout outlet 6 has all been seted up on the pipe wall of pipe section 3 and special-shaped pipe section 4, grout outlet 6 and the inside intercommunication of body 1.
The surface of the special-shaped pipe section 4 is sunken to form an arc surface groove structure 5, in the embodiment, each special-shaped pipe section 4 is provided with two arc surface groove structures 5, the two arc surface groove structures 5 are arranged in parallel and symmetrically arranged along the central axis of the special-shaped pipe section 4, as an improvement, the pipe diameter corresponding to the position of the non-arc surface groove structure 5 on the special-shaped pipe section 4 is larger than that of the round pipe section 3, the pipe diameter corresponding to the position of the bottom of the arc surface groove structure 5 on the special-shaped pipe section 4 is smaller than that of the round pipe section 3, the ratio of the pipe diameter corresponding to the position of the non-arc surface groove structure 5 on the special-shaped pipe section 4 to the pipe diameter corresponding to the position of the bottom of the arc surface groove structure 5 on the special-shaped pipe section 4 is 1:3, so that the sectional area of the anchor pipe is continuously changed along the length extension direction of the anchor pipe, and the arc surface groove structures 5 on the adjacent special-shaped pipe sections 4 are staggered and preferably vertically arranged at 90 degrees, thereby make the direct area of contact maximize of special-shaped pipe section 4 surface and slip casting body, contact surface and contact angle are diversified simultaneously, can furthest improve the anchor degree.
The number of the slurry outlet holes 6 on each circular pipe section 3 or the special-shaped pipe section 4 is multiple, and the slurry outlet holes 6 are uniformly distributed along the circumferential direction of the middle part of the circular pipe section 3 or the special-shaped pipe section. Thereby after the slip casting, the thick liquid can be followed anchor pipe inside and flowed out through grout outlet 6, guarantees the abundant combination of each angle and slip casting body.
In this embodiment, the anchor pipe is a steel anchor pipe. The multi-angle full filling and wrapping of the anchor pipe by the anchoring material can reduce the corrosion of the anchor pipe, achieve the purpose of long-term supporting and improve the durability of the supporting effect of the anchor pipe.
It is within the scope of the present invention to maintain the spacing between adjacent circular tube segments 3 consistent with each other and the distance between adjacent profiled tube segments 4 consistent with each other along the extension direction of the tubular body 1, or to change the distance between adjacent circular tube segments 3 and adjacent profiled tube segments 4 to properly adjust the performance.
A soft rock tunnel surrounding rock grouting reinforcement construction method based on the variable cross section grouting type anchor pipe comprises the following steps:
1) drilling a hole in the surrounding rock; adopting a conventional drilling construction process, positioning hole positions, setting a drilling machine platform, rechecking the positions of the drill holes to realize accurate positioning, and checking the sizes of the drill holes, such as length, diameter and the like after drilling;
2) inserting the conical shape of the anchor pipe inwards into the drill hole to prepare grouting;
3) the slurry adopts paste with the water-cement ratio lower than 0.4, a proper amount of alkaline water reducing agent can be added according to needs, the slurry is injected from the grouting opening 2 and is formed by secondary grouting, the first grouting adopts static pressure grouting, the second grouting is carried out after the slurry strength reaches a certain degree, and the second grouting adopts split grouting;
4) and sealing the anchor pipe after grouting is finished.
And (4) after the construction is finished, carrying out a drawing test, and confirming the anchoring effect. The result shows that the drawing force of the grouting anchor rod can be improved by more than 8 times compared with the traditional ordinary anchor pipe with smooth appearance by using the grouting anchor rod and the construction process.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a variable cross section slip casting formula anchor pipe, its characterized in that, includes the body, and body one end sets up coniform, and the slip casting mouth is seted up to the body other end, and the body includes a plurality of circle pipeline sections and special-shaped pipeline section, and circle pipeline section and special-shaped pipeline section interval set up and fixed connection, and the pipe diameter of circle pipeline section and special-shaped pipeline section is different, has all seted up out the thick liquid hole on the pipe wall of circle pipeline section and special-shaped pipeline section, and the thick liquid hole communicates with the body is inside.
2. The anchor pipe of claim 1, wherein the profiled pipe section is recessed in the surface to form a curved groove structure.
3. The anchor pipe of claim 2, wherein there are two of the arc-shaped groove structures on the special-shaped pipe section, and the two arc-shaped groove structures are arranged in parallel and symmetrically arranged along the central axis of the special-shaped pipe section.
4. The anchor pipe of claim 3, wherein the cambered groove structures on adjacent profiled pipe sections are staggered.
5. The variable cross-section grouting anchor pipe of claim 4, wherein the cambered groove structures on adjacent profiled pipe sections are vertically arranged.
6. The anchor pipe of claim 2, wherein the pipe diameter corresponding to the non-cambered groove structure position on the special-shaped pipe section is larger than that of the round pipe section, and the pipe diameter corresponding to the bottom position of the cambered groove structure on the special-shaped pipe section is smaller than that of the round pipe section.
7. The variable cross-section grouting type anchor pipe according to claim 2, wherein the ratio of the pipe diameter corresponding to the position of the non-cambered groove structure on the special-shaped pipe section to the pipe diameter corresponding to the position of the bottom of the cambered groove structure on the special-shaped pipe section is 1: 2-4.
8. The anchor pipe of claim 1, wherein the plurality of grout outlet holes are evenly distributed along the circumferential direction of the middle part of the circular pipe section or the irregular pipe section.
9. A variable cross-section grouted anchor pipe according to claim 1, wherein said anchor pipe is a steel anchor pipe.
10. A soft rock tunnel surrounding rock grouting reinforcement construction method based on the variable cross-section grouting type anchor pipe of any one of claims 1-9 is characterized by comprising the following steps:
1) drilling a hole in the surrounding rock;
2) inserting the anchor pipe into the drill hole to prepare for grouting;
3) the grout is formed by secondary grouting by adopting paste with the water cement ratio lower than 0.4, the first grouting adopts static pressure grouting, and the second grouting adopts split grouting;
4) and sealing the anchor pipe after grouting is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110852055.5A CN113446039A (en) | 2021-07-27 | 2021-07-27 | Grouting type variable cross-section anchor pipe and soft rock tunnel surrounding rock grouting reinforcement construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110852055.5A CN113446039A (en) | 2021-07-27 | 2021-07-27 | Grouting type variable cross-section anchor pipe and soft rock tunnel surrounding rock grouting reinforcement construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113446039A true CN113446039A (en) | 2021-09-28 |
Family
ID=77817425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110852055.5A Pending CN113446039A (en) | 2021-07-27 | 2021-07-27 | Grouting type variable cross-section anchor pipe and soft rock tunnel surrounding rock grouting reinforcement construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113446039A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116950701A (en) * | 2023-05-06 | 2023-10-27 | 中山大学 | Rock-soil anchoring measurement integrated monitoring device |
-
2021
- 2021-07-27 CN CN202110852055.5A patent/CN113446039A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116950701A (en) * | 2023-05-06 | 2023-10-27 | 中山大学 | Rock-soil anchoring measurement integrated monitoring device |
| CN116950701B (en) * | 2023-05-06 | 2024-03-26 | 中山大学 | Rock-soil anchoring measurement integrated monitoring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210917344U (en) | Anti-floating anchor rod | |
| CN206554832U (en) | Component and the grouting cable anchor and anchor pole using the component are only starched in a kind of hole | |
| CN111576403B (en) | Pile splicing structure and bearing platform anchoring structure using PHC tubular pile | |
| CN102704971B (en) | Grouting grouting cable anchor in hole | |
| WO2020037815A1 (en) | Single anchor concentrated grouting full-length anchored steel wire tendon and method for supporting same | |
| CN112431626A (en) | Prestressed grouting anchor rod with hydraulic telescopic sleeve, grouting system and method | |
| CN113446039A (en) | Grouting type variable cross-section anchor pipe and soft rock tunnel surrounding rock grouting reinforcement construction method | |
| CN210599052U (en) | Self-drilling anchoring type metal anchor rod for soft rock bottom plate | |
| CN110644295A (en) | Assembled karst grouting protective pipe assembly and grouting method | |
| CN102748048A (en) | Hole wall grouting anchor cable | |
| CN205576908U (en) | Novel anchoring rod | |
| CN215444104U (en) | Slip casting type variable cross-section anchor pipe | |
| CN210315529U (en) | Self-drilling high-pressure rotary-jetting bag grouting expanding anti-floating anchor rod | |
| CN212337326U (en) | Solid anchor cable capable of grouting | |
| CN212104063U (en) | Grouting type double-anchor-head anchor rod | |
| CN205530227U (en) | Pile driver drilling rod subassembly | |
| CN110593927B (en) | Grouting structure with adjustable depth and grouting method | |
| CN207362840U (en) | A kind of taper anchor cable suitable for rock side slope | |
| CN211112936U (en) | Assembled karst slip casting pillar subassembly | |
| CN112360530A (en) | Grouting anchor rod for geotechnical engineering construction | |
| CN208040424U (en) | A kind of anchor structure | |
| CN219862789U (en) | Mortar anchor rod with full-length sleeve | |
| CN110714488A (en) | Prefabricated self-drilling screw anti-floating anchor rod | |
| CN215256270U (en) | Grouting anchor rod | |
| CN220081439U (en) | Radial reinforcing system for shield tunnel penetrating through water area |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |