CN218813685U - Self-advancing anchor rod prestress applying device - Google Patents
Self-advancing anchor rod prestress applying device Download PDFInfo
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- CN218813685U CN218813685U CN202223251679.0U CN202223251679U CN218813685U CN 218813685 U CN218813685 U CN 218813685U CN 202223251679 U CN202223251679 U CN 202223251679U CN 218813685 U CN218813685 U CN 218813685U
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- anchor rod
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- anchoring
- prestress
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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Abstract
The application discloses a self-propelled anchor rod prestress applying device, which comprises an anchor rod, wherein the anchor rod comprises an exposed drill rod body, an anchoring agent isolation sleeve, an anchor rod anchoring section part, a spiral drilling steel sheet and an alloy drill bit, the anchoring agent isolation sleeve is sleeved outside the anchor rod anchoring section part, the spiral drilling steel sheet is connected with the anchor rod anchoring section part in a welding mode, and the alloy drill bit is arranged at the tail end of the anchor rod anchoring section part; set gradually waist rail, prestressing force locker, hollow jack and tool to lock from foundation ditch lateral wall one side on exposing the drilling rod body of rod, the stock is inside to be equipped with the slip casting pipe, and stock anchor section part end is equipped with the slip casting hole. The anchor rod has the advantages that the anchor rod is grouted for multiple times, the strength of the anchoring body is enhanced, a cavity in the position of the side wall of the foundation pit is filled, the anchor rod can apply prestress, and deformation of the foundation pit can be responded.
Description
Technical Field
The application belongs to the building construction field, concretely relates to from advancing formula stock prestressing force and applying device.
Background
With the development of underground space in large quantities, the foundation pit environment is more and more complicated, and especially in deep and thick pebble strata, the conventional anchor rod is difficult to construct, and the problems of hole collapse, drill sticking and the like exist. At present, the self-advancing anchor rod is mostly a full-bonding anchor rod, and the anchor rod can not apply prestress, so that the capability of limiting the deformation of a foundation pit is poor.
SUMMERY OF THE UTILITY MODEL
Based on above-mentioned problem, this application provides one kind can apply prestressing force, deals with the foundation ditch and warp a formula stock prestressing force applying device that advances certainly. The technical proposal is that the method comprises the following steps,
a self-advancing anchor rod prestress applying device comprises an anchor rod, wherein the anchor rod comprises an exposed drill rod body, an anchoring agent isolation sleeve, an anchor rod anchoring section part, a spiral drilling steel sheet and an alloy drill bit, the anchoring agent isolation sleeve is sleeved outside the anchor rod anchoring section part, the spiral drilling steel sheet is connected with the anchor rod anchoring section part in a welding mode, and the alloy drill bit is arranged at the tail end of the anchor rod anchoring section part; the exposed drill rod body is sequentially provided with a waist beam, a prestress locking device, a hollow jack and a lockset from one side of the side wall of the foundation pit, a grouting pipe is arranged in the anchor rod, and the tail end of the anchoring section of the anchor rod is provided with a grouting hole.
Preferably, the anchor rod body is a hollow high-strength alloy steel pipe, and a multi-section connecting mode combined rod body is adopted.
Preferably, the anchoring agent isolation sleeve is positioned above the spiral drilling steel sheet and close to one side of the side wall of the foundation pit, and a plastic sleeve is adopted.
Preferably, the prestress locking device is of a cylindrical structure and comprises a thick-wall steel pipe, an anchor rod hole, a pressure-bearing steel plate and welding holes, wherein the cylindrical pressure-bearing steel plate is arranged inside the thick-wall steel pipe, the anchor rod hole is formed in the center of the pressure-bearing steel plate, the thick-wall steel pipe is symmetrically provided with welding grooves, the radian of each welding groove is 20-40 degrees, and the diameter of each welding groove is 4-15cm.
Preferably, steel backing plates are arranged on two sides of the hollow jack.
Preferably, the lock comprises a lock ring and a lock clamping piece, wherein the lock clamping piece is of a conical structure, and an annular clamping groove is formed in the end face of the lock clamping piece.
Preferably, the anchor rod is internally provided with a secondary grouting pipe and a tertiary grouting pipe, a grout outlet of the secondary grouting pipe is positioned behind the spiral piece, and a grout outlet of the tertiary grouting pipe is positioned 1-2 meters behind the side wall of the foundation pit.
Advantageous effects
The anchorage device is used for locking the positions of the rod body and the hollow jack and providing conditions for applying prestress so as to better cope with foundation pit deformation.
Drawings
Fig. 1 is a schematic diagram of the present application.
Fig. 2 is a schematic view of the anchor rod structure.
Fig. 3 is a schematic view of the lock structure.
In the figure, 1, a foundation pit side wall, 2, a waist beam, 4, a prestress locking device, 5 steel backing plates, 6 hollow jacks, 8 locks, 9 exposed drill rod bodies, 10 prestress locking steel bars, 11 waist beam holes, 12 anchoring agent isolation sleeves, 13 anchor rod anchoring section parts, 14 spiral drilling steel sheets, 15 grouting holes, 16 alloy drill bits, 17 secondary grouting pipes, 18 tertiary grouting pipes, 19 secondary grouting holes, 20 tertiary grouting holes, 4-1 steel pipes, 4-2 anchor rod holes, 4-3 thick-wall pressure-bearing steel plates, 4-4 welding holes, 8-1 lock rings, 8-2 lock clamping pieces and 8-3 clamping grooves.
Detailed Description
The following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application.
As shown in fig. 1 to 3, the self-advancing anchor rod prestress applying device comprises an anchor rod, wherein a hollow high-strength alloy steel pipe is adopted as a rod body of the anchor rod, and a multi-section connecting mode combined rod body is adopted. The anchor rod comprises an exposed drill rod body 9, an anchoring agent isolation sleeve 12, an anchor rod anchoring section part 13, a spiral drilling steel sheet 14 and an alloy drill bit 16, wherein the anchoring agent isolation sleeve 12 is sleeved outside the anchor rod anchoring section part 13, the spiral drilling steel sheet 14 is connected with the anchor rod anchoring section part 13 in a welding mode, and the alloy drill bit 16 is arranged at the tail end of the anchor rod anchoring section part 13; the exposed drill rod body 9 is sequentially provided with a waist beam 2, a steel base plate 5, a prestress locking device 4, a hollow jack 6 and a lockset 8 from one side of the side wall 1 of the foundation pit, the steel base plate 5 is fixed on two sides of the hollow jack 6, and the steel base plate 5 is fixedly connected with the waist beam 2 and the prestress locking device 4.
Two grouting pipes, namely a secondary grouting pipe 17 and a tertiary grouting pipe 18, are arranged inside the anchor rod, and two grouting holes, namely a secondary grouting hole 19 and a tertiary grouting hole 20, are correspondingly arranged at the tail end of the anchoring section part 13 of the anchor rod.
The anchoring agent isolation sleeve 12 is positioned above the spiral drilling steel sheet 14 and close to one side of the side wall 1 of the foundation pit, and is a plastic sleeve. The prestress locking device 4 is of a cylindrical structure and comprises a thick-wall steel pipe 4-1, an anchor rod hole 4-2, a pressure-bearing steel plate 4-3 and a welding hole 4-4, wherein the thick-wall steel pipe is internally provided with the cylindrical pressure-bearing steel plate, the anchor rod hole is formed in the center of the pressure-bearing steel plate, the thick-wall steel pipe is symmetrically provided with welding grooves, the radian of each welding groove is 30 degrees, and the diameter of each welding groove is 10cm.
The lock 8 comprises a lock ring 8-1 and a lock clamping piece 8-2, the lock clamping piece is of a conical structure, and an annular clamping groove 8-3 is formed in the end face of the lock clamping piece.
Application method
Firstly, a self-advancing anchor rod is adopted for drilling construction, after an anchoring section part is constructed on the anchor rod, an anchoring agent isolation sleeve 12 is arranged on the rest rod body part, and drilling construction is continued until the designed rod body length is reached. The exposed length of the anchor rod is not less than 1.0 meter. And then, injecting cement slurry to the hollow position of the anchor rod for the first time by adopting high-pressure grouting equipment until the cement slurry turns out from the drilling hole. When the primary grouting liquid finishes initial setting, adopting a secondary grouting pipe to perform high-pressure grouting, and finishing secondary grouting after the grouting pressure is stabilized to be 1-1.5 Mpa; and performing three times of grouting, and finishing grouting after the orifice returns. And after grouting is finished, constructing a waist beam 2, which is generally a cast-in-place concrete waist beam and can also be a steel waist beam, at the position of the anchor rod on the side wall 1 of the foundation pit. And (4) performing prestress tensioning and locking after the strength of the cement paste reaches 75% of the designed strength.
The prestress tension is composed of a prestress locking device 4, a hollow jack 6, a lockset 8, a plurality of steel base plates 5, welding steel bars and the like. The prestress locking device 4 is made of a thick-wall steel pipe with the diameter of 15-20cm and a steel plate, a hole with the height of about 10cm and the width of about 10cm is formed in the side wall of the steel pipe and used for prestress locking welding construction, and a steel base plate with holes is arranged at the top of the steel pipe and used for bearing prestress applied by the hollow jack 6. The lock 8 is used for locking the positions of the rod body and the hollow jack 6 and providing conditions for applying prestress. The lock 8 is clamped on the exposed drill rod body 9, and the hollow jack 6 is locked. The hollow jack is tensioned to apply pretightening force. Firstly, the lock ring 8-1 is sleeved on the anchor rod, and then the clamping piece 8-2 is arranged in the hollow position of the lock ring 8-1.
After the prestress locking device 4, the hollow jack 6, the lock 8 and the steel backing plate 5 are assembled in sequence, the hollow jack 6 is stretched, and after the hollow jack 6 is stretched to the designed locking value of 1.2 times, the stretching state of the hollow jack 6 is kept. At the moment, the steel bars are fully welded on the side wall of the thick-wall steel pipe 4-1 through the welding holes of the prestress locking device 4 in a welding mode, and during welding, the contact surface between the steel bars and the thick-wall steel pipe 4-1 and the contact surface between the steel bars and the steel backing plate 5 are fully welded. 2-4 steel bars are welded according to the situation according to the size of the locking value, and the steel bars can adopt steel bars with the diameter of 25-36 mm. The locking of the prestress is realized after the welding is finished. The hollow jack 6, the lock 8 and the auxiliary steel plate can be removed, and the exposed redundant part of the anchor rod is cut off.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. A self-propelled anchor rod prestress applying device is characterized by comprising an anchor rod, wherein the anchor rod comprises an exposed drill rod body, an anchoring agent isolation sleeve, an anchor rod anchoring section part, a spiral drilling steel sheet and an alloy drill bit, the anchoring agent isolation sleeve is sleeved outside the anchor rod anchoring section part, the spiral drilling steel sheet is connected with the anchor rod anchoring section part in a welding mode, and the alloy drill bit is arranged at the tail end of the anchor rod anchoring section part; the exposed drill rod body is sequentially provided with a waist beam, a prestress locking device, a hollow jack and a lockset from one side of the side wall of the foundation pit, a grouting pipe is arranged in the anchor rod, and the tail end of the anchoring section of the anchor rod is provided with a grouting hole.
2. The self-advancing anchor rod prestress applying device according to claim 1, wherein the anchor rod body is a hollow high-strength alloy steel pipe, and a multi-section connecting combined rod body is adopted.
3. The self-advancing anchor rod prestress applying device according to claim 1, wherein the anchoring agent isolating sleeve is positioned above the spiral drilling steel sheet and on one side close to the side wall of the foundation pit, and a plastic sleeve is adopted.
4. The self-advancing anchor rod prestress applying device according to claim 1, wherein the prestress locking device is of a cylindrical structure and comprises a thick-wall steel pipe, an anchor rod hole, a pressure-bearing steel plate and a welding hole, the thick-wall steel pipe is internally provided with the cylindrical pressure-bearing steel plate, the anchor rod hole is arranged at the center of the pressure-bearing steel plate, the thick-wall steel pipe is symmetrically provided with welding grooves, the radian of each welding groove is 20-40 degrees, and the diameter of each welding groove is 4-15cm.
5. A self-advancing bolt pre-stressing device as defined in claim 1, wherein steel tie-plates are provided on both sides of the hollow jack.
6. The self-propelled anchor rod prestress applying device according to claim 1, wherein the lock comprises a lock ring and a lock clamping piece, the lock clamping piece is of a conical structure, and an annular clamping groove is formed in the end face of the lock clamping piece.
7. The self-advancing anchor rod prestress applying device according to claim 1, wherein a secondary grouting pipe and a tertiary grouting pipe are arranged inside the anchor rod, a grout outlet of the secondary grouting pipe is located behind the spiral sheet, and a grout outlet of the tertiary grouting pipe is located 1-2 meters behind the side wall of the foundation pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223251679.0U CN218813685U (en) | 2022-12-06 | 2022-12-06 | Self-advancing anchor rod prestress applying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223251679.0U CN218813685U (en) | 2022-12-06 | 2022-12-06 | Self-advancing anchor rod prestress applying device |
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| CN218813685U true CN218813685U (en) | 2023-04-07 |
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| CN202223251679.0U Active CN218813685U (en) | 2022-12-06 | 2022-12-06 | Self-advancing anchor rod prestress applying device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116220733A (en) * | 2023-05-08 | 2023-06-06 | 济南轨道交通集团有限公司 | Internal anchoring combined protection technology for lower existing tunnel under top unloading |
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2022
- 2022-12-06 CN CN202223251679.0U patent/CN218813685U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116220733A (en) * | 2023-05-08 | 2023-06-06 | 济南轨道交通集团有限公司 | Internal anchoring combined protection technology for lower existing tunnel under top unloading |
| CN116220733B (en) * | 2023-05-08 | 2023-08-18 | 济南轨道交通集团有限公司 | Internal anchoring combined protection technology for lower existing tunnel under top unloading |
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