CN106968695B - Prefabricated tunnel lock foot stock and steelframe connecting element - Google Patents
Prefabricated tunnel lock foot stock and steelframe connecting element Download PDFInfo
- Publication number
- CN106968695B CN106968695B CN201710305767.9A CN201710305767A CN106968695B CN 106968695 B CN106968695 B CN 106968695B CN 201710305767 A CN201710305767 A CN 201710305767A CN 106968695 B CN106968695 B CN 106968695B
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- CN
- China
- Prior art keywords
- anchor rod
- steel frame
- locking anchor
- foot locking
- foot
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D21/008—Anchoring or tensioning means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The invention discloses a prefabricated connecting component for a tunnel foot locking anchor rod and a steel frame, and belongs to the technical field of tunnel engineering. The invention comprises a foot locking anchor rod, a supporting steel frame, a positioning ring piece, a left bolt sleeve, a right bolt sleeve and a bolt fastener. In the preparation stage, firstly, carrying out thread processing pretreatment on the end head (one side connected with a steel frame) of the foot locking anchor rod; secondly, according to the design position and the construction angle of the foot locking anchor rod, the positioning ring piece is welded at the corresponding position of the supporting steel frame. In the construction stage, the foot locking anchor rods are accurately positioned and constructed through the front positioning ring piece and the rear positioning ring piece of the support steel frame, and then the foot locking anchor rods on two sides of the support steel frame are connected into a whole by utilizing the prefabricated left-width bolt sleeve, the prefabricated right-width bolt sleeve and the prefabricated right-width bolt fastener. By adopting the structure, accurate construction of the foot locking anchor rod and stable connection of the foot locking anchor rod and the supporting steel frame can be realized, the overall stability of the primary supporting structure of the tunnel is enhanced, and a great difficulty in tunnel engineering construction is effectively solved.
Description
Technical Field
The invention relates to a steel frame connecting member, in particular to a prefabricated tunnel foot locking anchor rod and steel frame connecting member, and belongs to the technical field of tunnel engineering.
Background
In recent years, with the strong development of railway construction, tunnel engineering projects are more common, and the engineering geological conditions are more complex. When the tunnel positive hole, the auxiliary tunnel or the auxiliary chamber is constructed in the poor section of surrounding rock, a foot locking anchor rod is usually required to be additionally arranged in the range of the side wall in the primary support process so as to enhance the integral stability of the primary support structure and prevent the arch feet from shrinking and falling off. However, when tunnel positive holes, auxiliary tunnels or auxiliary caverns are constructed in poor surrounding rock areas.
However, at present, a steel bar welding mode is mostly adopted to connect the foot locking anchor rod and the supporting steel frame in the construction process, the process is too single, the welding procedure is complex, the effect is poor, and engineering accidents caused by the complex welding procedure occur sometimes.
Disclosure of Invention
The invention aims to solve the engineering problem of poor connection effect of a tunnel supporting steel frame and a foot locking anchor rod at present, and provides a set of prefabricated tunnel foot locking anchor rod and steel frame connecting member: and realizes the standardization and the industrial production of the connecting component.
The technical scheme of the invention is as follows: a prefabricated tunnel lock foot stock and steelframe connecting element, its characterized in that: the connecting component consists of an anchor rod (1), a supporting steel frame (2), a positioning ring piece (3), a left bolt sleeve (4), a right bolt sleeve (5) and a bolt fastener (6); in the preparation stage, firstly, tapping thread processing pretreatment is carried out on the end head of the foot locking anchor rod (1); then, according to the design position and the construction angle of the foot locking anchor rod (1), the positioning ring piece (3) is welded at the front flange and the rear flange of the supporting steel frame (2); in the construction stage, after the foot locking anchor rods (1) penetrate through reserved holes in two positioning ring sheets (3) of the front flange and the rear flange of the supporting steel frame (2), accurate positioning construction is performed in a rock layer, and then the foot locking anchor rods (1) on two sides of the supporting steel frame (2) are connected into a whole by utilizing the prefabricated left-width bolt sleeve (4), the prefabricated right-width bolt sleeve (5) and the prefabricated bolt fastener (6) in an anchoring mode.
The foot locking anchor rod (1) is a mortar anchor rod, and the diameter of the foot locking anchor rod is 22mm or 25mm; the end of the foot locking anchor rod (1) connected with one side of the supporting steel frame (2) needs to be subjected to thread tapping pretreatment in the early construction stage, and the length of the thread section of the end of the foot locking anchor rod (1) is 5-10 cm.
The support steel frame (2) is a steel frame, and the model is I14, I16, I18, I20 or I22.
The positioning ring piece (3) is a steel plate with the thickness of 10mm; the reserved aperture in the positioning ring sheet is larger than the diameter of the foot locking anchor rod (1) by 1-mm-2 mm, namely the diameter of the reserved hole is 24mm or 27mm; the width of the positioning ring piece (3) is 10mm, and the outer contour of the positioning ring piece (3) is integrally connected with the bolt sleeves (4, 5).
The left bolt sleeve (4) and the right bolt sleeve (5) are made of profile steel, the inner diameters of the bolt sleeves (4, 5) are matched with the lock foot anchor rod (1), and the diameters are 22mm or 25mm; screw threads for anchoring connection with the foot locking anchor rod (1) are arranged in the bolt sleeves (4, 5); the thickness of the bolt sleeves (4, 5) is 10mm, the outer diameters of the bolt sleeves (4, 5) are matched with the diameter of the lock foot anchor rod (1), and the diameters of the bolt sleeves (4, 5) are 32mm or 35mm; the thickness of the bolt sleeve (4, 5) connecting steel plates is 10mm.
The bolt fastener (6) is made of profile steel, and the bolt fastener (6) is matched with the left bolt sleeve (4) and the right bolt sleeve (5) for use; after the construction of the foot locking anchor rod (1) is completed, the left bolt sleeve ((4) and the right bolt sleeve (5) are respectively connected with the left foot locking anchor rod and the right foot locking anchor rod (1) in a threaded anchoring manner, and finally the left bolt sleeve (4) and the right bolt sleeve (5) are connected into a whole by utilizing the bolt fastener (6).
The connecting component is also suitable for the connection construction of the tunnel foot locking anchor pipe and the steel frame.
The application steps of the invention are as follows:
(1) And (3) construction preparation: (1) pre-processing (tapping) threads on the end (connected with the steel frame) of the foot locking anchor rod; (2) and (3) according to the design position and the construction angle of the foot locking anchor rod, welding the positioning ring piece at the corresponding positions of the front flange and the rear flange of the support steel frame in advance.
(2) The construction is carried out: (1) the four positioning ring pieces (3) welded on the front flange and the rear flange of the supporting steel frame 2 are utilized to accurately position the foot locking anchor rod 1, and the installation construction of the foot locking anchor rod 1 for fixing rocks is carried out; (2) after the construction of the foot locking anchor rod 1 is completed, the left bolt sleeve 4 and the right bolt sleeve 5 are respectively connected with the foot locking anchor rod 1 at the left side and the right side in a threaded anchoring manner; (3) the left bolt sleeve 4 and the right bolt sleeve 5 are fastened and connected with each other into a whole by the bolt fastener 6.
The beneficial effects are as follows: the connecting member can realize accurate construction of the foot locking anchor rod and stable connection of the foot locking anchor rod and the supporting steel frame, enhance the integral stability of the primary supporting structure of the tunnel, and effectively solve a great difficulty in the construction of the tunnel engineering at present; and secondly, the connecting component can be prefabricated in the construction preparation stage, so that factory standardization and batch production are realized, the construction process is simple, convenient and quick, and the engineering value and the social benefit are remarkable.
Drawings
Fig. 1: the invention relates to a connecting component of a prefabricated tunnel foot locking anchor rod and a steel frame.
Fig. 2: the invention relates to a pretreatment method for the thread of the end of a lock foot anchor rod.
Fig. 3: the invention relates to a large sample graph of a positioning ring sheet.
Fig. 4: the invention discloses a steel frame and positioning ring piece welding pretreatment.
Fig. 5: the invention relates to a plane large-scale sample drawing of a bolt sleeve prefabricated part.
Fig. 6: the invention relates to a large vertical surface sample drawing of a bolt sleeve prefabricated part.
Fig. 7: the invention relates to an exploded large-scale view of a bolt sleeve prefabricated part.
The reference numerals in the figures are: 1-a foot locking anchor rod; 2-supporting a steel frame; 3-positioning ring pieces; 4-left bolt sleeve; 5-right bolt sleeve; 6-a bolt fastener.
Detailed Description
The invention is described in further detail below by means of the figures and examples, but the scope of protection of the invention is not limited to the description.
Examples: as shown in fig. 1-7, the prefabricated tunnel foot locking anchor rod and steel frame connecting member provided by the invention consists of a foot locking anchor rod 1, a supporting steel frame 2, a positioning ring piece 3, a left bolt sleeve 4, a right bolt sleeve 5 and a bolt fastener 6. In the preparation stage, firstly, carrying out thread processing pretreatment on the end head (one side connected with a steel frame) of the foot locking anchor rod 1; secondly, according to the design position and the construction angle of the foot locking anchor rod 1, the positioning ring piece 3 is welded at the corresponding position of the supporting steel frame 2. In the construction stage, the foot locking anchor rods 1 are accurately positioned and constructed through the front positioning ring piece 3 and the rear positioning ring piece 3 of the support steel frame 2, and then the foot locking anchor rods 1 on two sides of the support steel frame 2 are connected into a whole in an anchoring manner by utilizing the prefabricated left bolt sleeve 4, the prefabricated right bolt sleeve 5 and the prefabricated right bolt fastener 6.
The foot locking anchor rod 1 is a mortar anchor rod, and the diameter of the foot locking anchor rod is 22mm or 25mm; the end head of the foot locking anchor rod 1 on one side of the supporting steel frame 2 is subjected to thread processing pretreatment in the early construction stage, and the length of the anchor rod with the thread section is 5-10 cm. The support steel frame 2 is a steel frame, and the model is I14, I16, I18, I20 or I22. The positioning ring sheet 3 is a steel plate with the thickness of 10mm; the reserved aperture of the ring piece is larger than the diameter of the foot locking anchor rod 1 by 2mm, namely the diameter of the ring piece is 24mm or 27mm; the width of the ring piece is 10mm, and the outer contour is integrally connected with the bolt sleeves 4 and 5. The bolt sleeve (left width) 4 and the bolt sleeve (right width) 5 are made of section steel, the inner diameter of the sleeve is consistent with that of the foot locking anchor rod 1, and the diameter is 22mm or 25mm; threads are arranged in the sleeve and are in anchoring connection with the foot locking anchor rod 1; the thickness of the sleeve is 10mm, the outer diameter of the sleeve is determined according to the diameter of the foot locking anchor rod 1, and the diameter is 32mm or 35mm; the thickness of the sleeve connecting steel plate is 10mm, and the width is consistent with the diameter. The bolt fastener 6 is made of profile steel, and is basically designed in the left-width bolt sleeve 4, and a small amount of the bolt fastener is designed in the right-width bolt sleeve 5. After the construction of the foot locking anchor rod 1 is completed, the left bolt sleeve 4 and the right bolt sleeve 5 are respectively in anchoring threaded connection with the foot locking anchor rod 1 on the left side and the right side, and finally the left bolt sleeve 4 and the right bolt sleeve 5 are fastened and connected into a whole by utilizing the bolt fastener 6. The connecting component is also suitable for the connection construction of the tunnel lock foot anchor pipe and the steel frame.
By adopting the structure, accurate construction of the foot locking anchor rod and stable connection of the foot locking anchor rod and the supporting steel frame can be realized, the overall stability of the primary supporting structure of the tunnel is enhanced, and a great difficulty in tunnel engineering construction is effectively solved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. A prefabricated tunnel lock foot stock and steelframe connecting element, its characterized in that: the connecting component consists of an anchor rod (1), a supporting steel frame (2), a positioning ring piece (3), a left bolt sleeve (4), a right bolt sleeve (5) and a bolt fastener (6); screw threads for anchoring connection with the foot locking anchor rods (1) are arranged in the bolt sleeves (4, 5), and the outer contours of the positioning ring pieces (3) are integrally connected with the bolt sleeves (4, 5);
in the preparation stage, tapping thread processing pretreatment is carried out on the end head of one side of the foot locking anchor rod (1) connected with the steel frame in advance; then, according to the design position and the construction angle of the foot locking anchor rod (1), the positioning ring piece (3) is welded at the front flange and the rear flange of the supporting steel frame (2) in advance;
in the construction stage, after the foot locking anchor rod (1) passes through the reserved holes in the two positioning ring sheets (3) welded on the front flange and the rear flange of the supporting steel frame (2), the foot locking anchor rod (1) is constructed into a rock layer after accurate positioning, after the construction of the foot locking anchor rod (1) is completed, the left and right prefabricated bolt sleeves (4) and (5) are respectively in threaded anchoring threaded connection with the foot locking anchor rods (1) on the left and right sides, and at the moment, the outer contour of the positioning ring sheets (3) is integrally connected with the bolt sleeves (4 and 5); and then the left bolt sleeve (4) and the right bolt sleeve (5) are mutually buckled and connected into a whole by utilizing the bolt fastener (6), so that accurate construction of the foot locking anchor rod (1) and stable connection of the foot locking anchor rod and the supporting steel frame (2) are realized.
2. The prefabricated tunnel lock foot anchor and steel frame connecting member according to claim 1, wherein: the foot locking anchor rod (1) is a mortar anchor rod, and the diameter of the foot locking anchor rod is 22mm or 25mm; the end of the foot locking anchor rod (1) connected with one side of the supporting steel frame (2) needs to be subjected to thread tapping pretreatment in the early construction stage, and the length of the thread section of the end of the foot locking anchor rod (1) is 5-10 cm.
3. The prefabricated tunnel lock foot anchor and steel frame connecting member according to claim 1, wherein: the support steel frame (2) is a steel frame, and the model is I14, I16, I18, I20 or I22.
4. The prefabricated tunnel lock foot anchor and steel frame connecting member according to claim 1, wherein: the positioning ring piece (3) is a steel plate with the thickness of 10mm; the reserved aperture in the positioning ring sheet is larger than the diameter of the foot locking anchor rod (1) by 1-mm-2 mm, namely the diameter of the reserved hole is 24mm or 27mm; the width of the positioning ring piece (3) is 10mm.
5. The prefabricated tunnel lock foot anchor and steel frame connecting member according to claim 1, wherein: the left bolt sleeve (4) and the right bolt sleeve (5) are made of profile steel, the inner diameters of the bolt sleeves (4, 5) are matched with the lock foot anchor rod (1), and the diameters are 22mm or 25mm; the thickness of the bolt sleeves (4, 5) is 10mm, the outer diameters of the bolt sleeves (4, 5) are matched with the diameter of the lock foot anchor rod (1), and the diameters of the bolt sleeves (4, 5) are 32mm or 35mm; the thickness of the bolt sleeve (4, 5) connecting steel plates is 10mm.
6. The prefabricated tunnel lock foot anchor and steel frame connecting member according to claim 1, wherein: the bolt fastener (6) is made of profile steel, and the bolt fastener (6) is matched with the left bolt sleeve (4) and the right bolt sleeve (5) for use; after the construction of the foot locking anchor rod (1) is completed, the left bolt sleeve (4) and the right bolt sleeve (5) are respectively connected with the left foot locking anchor rod and the right foot locking anchor rod (1) in a threaded anchoring manner, and finally the left bolt sleeve (4) and the right bolt sleeve (5) are connected into a whole by utilizing the bolt fastener (6).
7. The prefabricated tunnel lock foot anchor and steel frame connecting member according to claim 1, wherein: the connecting component is also suitable for the connection construction of the tunnel foot locking anchor pipe and the steel frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710305767.9A CN106968695B (en) | 2017-05-03 | 2017-05-03 | Prefabricated tunnel lock foot stock and steelframe connecting element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710305767.9A CN106968695B (en) | 2017-05-03 | 2017-05-03 | Prefabricated tunnel lock foot stock and steelframe connecting element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106968695A CN106968695A (en) | 2017-07-21 |
| CN106968695B true CN106968695B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710305767.9A Active CN106968695B (en) | 2017-05-03 | 2017-05-03 | Prefabricated tunnel lock foot stock and steelframe connecting element |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107676110B (en) * | 2017-08-23 | 2023-09-08 | 北京工业大学 | Connecting structure of lock leg anchoring device and supporting arch frame |
| CN108150104B (en) * | 2018-02-09 | 2023-12-26 | 中交隧道工程局有限公司 | Pin locking anchor pipe drilling positioning device and anchor pipe fixing method |
| CN109252876A (en) * | 2018-06-26 | 2019-01-22 | 中铁五局集团贵州工程有限公司 | A kind of advanced tubule angle positioning device |
| CN112267903A (en) * | 2020-10-26 | 2021-01-26 | 中铁八局集团第一工程有限公司 | Accurate positioning and construction method for tunnel foot locking anchor rod |
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| CN206957752U (en) * | 2017-05-03 | 2018-02-02 | 云南建投基础工程有限责任公司 | A kind of prefabrication type tunnel lock foot anchoring stock and steelframe connecting elements |
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| KR20130081849A (en) * | 2012-01-10 | 2013-07-18 | 호서대학교 산학협력단 | Tunnel supporting structure |
| CN202787668U (en) * | 2012-08-07 | 2013-03-13 | 中建三局建设工程股份有限公司 | Rear bolt anchoring system for cantilever steel I-beam |
| CN202991079U (en) * | 2013-01-09 | 2013-06-12 | 中铁十二局集团第四工程有限公司 | Base plate type connection device of anchor rod or anchor pipe and structural steel frame |
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| CN106968695A (en) | 2017-07-21 |
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