CN210660154U - Lock foot anchor bolt supporting construction with expansion bolts is consolidated - Google Patents
Lock foot anchor bolt supporting construction with expansion bolts is consolidated Download PDFInfo
- Publication number
- CN210660154U CN210660154U CN201921597500.2U CN201921597500U CN210660154U CN 210660154 U CN210660154 U CN 210660154U CN 201921597500 U CN201921597500 U CN 201921597500U CN 210660154 U CN210660154 U CN 210660154U
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- steel frame
- expansion bolt
- foot
- anchor rod
- expansion
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Abstract
The utility model discloses a foot-locking anchor rod supporting structure reinforced by expansion bolts, which comprises a steel frame, an anchor rod and expansion bolts; positioning insertion holes for inserting anchor rods are formed in two sides of the steel frame, and limiting guide strips arranged at intervals extend downwards from the bottom of the steel frame; the anchor rod comprises an inserting part penetrating into the inserting hole and a bearing part embedded between the limiting guide strips, and the bearing part is abutted against the bottom of the steel frame to support the steel frame; one end of the inserting part is fixedly connected with the bearing part, and the other end of the inserting part is fixedly connected with the expansion bolt. The novel anchor rod has a stronger anchoring effect by welding the expansion bolt, so that greater supporting resistance is provided for surrounding rocks around the gallery, harmful excessive deformation of the surrounding rocks is prevented, the integrity of the steel arch centering is increased, the connection between the steel arch centering and the foot-locking anchor rod is firmer, and the limit bearing capacity is improved; and the jack and the limiting guide rod limit the mounting position of the anchor rod, so that accurate support is realized.
Description
Technical Field
The utility model relates to a tunnel support equipment field especially relates to a lock foot stock supporting construction with expansion bolts consolidates.
Background
When the tunnel passes through a weak stratum, the weak surrounding rock has poor self-stability, so that the problems of cracking of a primary support, distortion of a steel arch frame and the like are easily caused by large deformation in the construction process, and hidden troubles are brought to construction and later safe operation. The foot-locking anchor rod has the characteristics of effectively controlling the settlement of the steel arch frame and improving the integrity of a supporting structure, so that the foot-locking anchor rod is generally applied to the construction of weak surrounding rock tunnels. At present, anchor pipes and an arch center are mostly welded through L-shaped steel bars in the existing construction process, but in the current construction process, a foot-locking anchor rod and the steel arch center are directly welded into a whole, and in a weak stratum, in order to increase the frictional resistance and the normal pressure between surrounding rocks and the anchor rod, the foot-locking anchor rod with a larger diameter is often used. The main function of the foot-locking anchor rod is to limit the displacement of the steel arch as much as possible, and to play the rigidity and strength of the steel arch, so that the steel arch can bear the pressure caused by the deformation of surrounding rocks as early as possible, and the stability of the tunnel at the initial stage is ensured. The foot locking anchor rods are firmly connected with the steel arch centering, so that the foot locking anchor rods and the steel arch centering are connected into a whole, the steel arch centering is anchored at the deep part of the surrounding rock, the displacement of the steel arch centering is limited to a certain extent, the rigidity and the strength of the steel arch centering are fully exerted, so that larger supporting resistance is provided for the surrounding rock around the gallery, and the harmful excessive deformation of the surrounding rock is prevented.
However, when a certain surrounding rock pressure is borne, the tip of the foot-locking anchor rod cannot be tightly embedded into the surrounding rock due to the influences of surrounding rock loosening, construction and the like, and the foot-locking anchor rod loses the supporting function too early.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving above-mentioned technical problem to a certain extent at least. Therefore, the utility model provides a prevent not hard up lock foot stock supporting construction that has expansion bolts and consolidate.
The utility model provides a technical scheme that its technical problem adopted is: a foot-locking anchor rod supporting structure with expansion bolt reinforcement comprises a steel frame, an anchor rod and an expansion bolt; positioning insertion holes for inserting anchor rods are formed in two sides of the steel frame, and limiting guide strips arranged at intervals extend downwards from the bottom of the steel frame; the anchor rod comprises an inserting part penetrating into the inserting hole and a bearing part embedded between the limiting guide strips, and the bearing part is abutted against the bottom of the steel frame to support the steel frame; one end of the inserting part is fixedly connected with the bearing part, and the other end of the inserting part is fixedly connected with the expansion bolt.
Further, a bracket matched with the bearing part is arranged at the bottom of the steel frame
Further, the limiting guide bars are positioned on two sides below the bracket.
Further, the stock symmetry sets up steelframe both sides.
Furthermore, limiting plates are arranged on two sides of the steel frame in an outwards extending mode, and the jacks are arranged on the limiting plates.
Further, the bearing parts of the two anchor rods are fixedly connected through welding.
Further, the expansion bolt comprises a screw rod, one end of the screw rod is provided with a conical head, the other end of the screw rod is provided with a center hole, and the inserting part and one end, fixed by the expansion bolt, of the inserting part are provided with inserting columns inserted into the center hole.
Furthermore, the inserted column is fixedly connected with the central hole through threads.
Further, the insertion portion and the expansion bolt are fixed by welding.
The utility model has the advantages that: through fixed connection expansion bolts on the insertion portion at the stock, make the insertion portion bury behind the country rock, can pass through expansion bolts's inflation effect, produce the locking force, make the frictional force of lock foot stock and country rock increase, increase the rigidity and the intensity of steelframe, improve the anchoring effect of lock foot stock, make novel stock have stronger anchor effect through expansion bolts, so that provide great supporting resistance to the peripheral country rock of gallery, prevent that the country rock from producing harmful excessive deformation, increase the wholeness with the steel bow member. By adopting the novel structure, the connection between the steel arch frame and the foot locking anchor rod is firmer, and the ultimate bearing capacity is improved; and the jack and the limiting guide rod limit the mounting position of the anchor rod, so that accurate support is realized.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a schematic view of a mounting structure according to one embodiment;
FIG. 2 is an exploded view of an installation according to one embodiment;
fig. 3 is an enlarged view at a of fig. 2.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1 to 3, a foot-locking bolting structure with expansion bolt reinforcement of the present invention includes a steel frame 110, a bolt 120 and an expansion bolt 130.
Two sides (left and right sides) of the steel frame 110 are provided with positioning insertion holes 112 for inserting the anchor rods 120, and the bottom of the steel frame extends downwards to be provided with spacing guide strips 113 arranged at intervals. Specifically, limiting plates 111 extend outwards from two sides of the steel frame 110, and the insertion holes 112 are formed in the limiting plates 111.
The anchor rod 120 comprises an insertion part 121 penetrating into the insertion hole 112 and a bearing part 122 embedded between the limiting guide strips 113, and the insertion part 121 is used for being inserted into the surrounding rock to realize anchoring support. The receiver 122 and the insert 121 form an L-shaped anchor perpendicular to each other. The supporting portion 122 abuts against the bottom of the steel frame 110 to support the steel frame 110. During installation, the inserting portion 121 is inserted into the inserting hole 112, the supporting portion 122 is embedded between the two limiting guide strips 113 and is inserted upwards until the supporting portion 122 abuts against the steel frame 110, and the inserting hole 112 and the limiting guide strips 113 can well achieve the positioning, guiding and installing functions. One end of the insertion portion 121 is fixedly connected to the support portion 122, and the other end is fixedly connected to the expansion bolt 130. Preferably, the insertion portion 121 and the support portion 122 are integrally formed, and the insertion portion 121 and the expansion bolt 130 are fixed by welding, specifically, the expansion bolt 130 includes a screw 131, a nut 132 and an expansion pipe, and the insertion portion 121 and the screw 131 of the expansion bolt 130 are fixed by welding. In order to realize accurate positioning of the expansion bolt 130 and the screw 131 during welding, one end of the screw 131 is provided with a conical head, the other end of the screw 131 is provided with a central hole 1311, one end of the inserting part 121, which is fixed with the expansion bolt 130, is provided with an inserting column 123 inserted into the central hole 1311, the inserting column 123 is matched with the central hole 1311 to realize positioning, and after positioning, welding is carried out at a contact position to realize fixing. In order to improve the connection strength between the insertion part 121 and the expansion bolt 130, the outer peripheral wall of the insertion column 123 is provided with a thread, the central hole 1311 is a threaded hole matched with the thread, and the insertion column 123 and the central hole 1311 are fixed through threaded connection, so that not only welding but also threaded connection are realized, and good connection strength is realized through double connection.
In order to ensure that the supporting portion 122 has good contact with the steel frame 110 and increase the contact area, the bottom of the steel frame 110 is provided with a bracket 114 matched with the supporting portion 122, the cross section of the supporting portion 122 is circular, the bracket 114 is a semicircular groove matched with the supporting portion, the extending direction of the bracket 114 is the acting direction, and the limiting guide strips 113 are located on two sides (front and rear sides) below the bracket 114.
Preferably, for structural symmetry, the anchors 120 are symmetrically disposed on two sides of the steel frame 110, and the supporting portions 122 are oppositely disposed to support the steel frame 110. In order to improve the connection strength, the support portions 122 of the two anchor rods 120 are fixed by welding, and the support portions 122 may also be welded with the steel frame 110 as a whole.
According to the design, the expansion bolt 130 is fixedly connected to the insertion part 121 of the anchor rod 120, so that after the insertion part 121 is embedded into the surrounding rock, locking force can be generated through the expansion effect of the expansion bolt 130, the friction force between the foot-locking anchor rod 120 and the surrounding rock is increased, and the rigidity and the strength of a steel frame are increased; and the jack and the limiting guide rod limit the mounting position of the anchor rod, so that accurate support is realized.
The above embodiments are only used for illustrating the technical solutions of the present invention and are not limited thereto, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of the technical solutions of the present invention.
Claims (9)
1. The utility model provides a lock foot stock supporting construction with expansion bolts is consolidated which characterized in that: the steel frame (110), the anchor rod (120) and the expansion bolt (130) are included;
positioning insertion holes (112) for inserting anchor rods (120) are formed in two sides of the steel frame (110), and limiting guide strips (113) arranged at intervals extend downwards from the bottom of the steel frame;
the anchor rod (120) comprises an insertion part (121) penetrating into the insertion hole (112) and a bearing part (122) embedded between the limiting guide strips (113), and the bearing part (122) is abutted against the bottom of the steel frame (110) to support the steel frame (110);
one end of the insertion part (121) is fixedly connected with the bearing part (122), and the other end of the insertion part is fixedly connected with the expansion bolt (130).
2. A foot-locking bolting construction with expansion bolt reinforcement according to claim 1, characterised in that: and a bracket (114) matched with the bearing part (122) is arranged at the bottom of the steel frame (110).
3. A foot-locking bolting construction with expansion bolt reinforcement according to claim 2, characterised in that: the limiting guide strips (113) are positioned on two sides below the bracket (114).
4. A foot-locking bolting construction with expansion bolt reinforcement according to claim 1, characterised in that: the anchor rods (120) are symmetrically arranged on two sides of the steel frame (110).
5. A lock foot bolt support construction with expansion bolt reinforcement according to claim 4, characterized in that: limiting plates (111) extend outwards from two sides of the steel frame (110), and the insertion holes (112) are formed in the limiting plates (111).
6. A lock foot bolt support construction with expansion bolt reinforcement according to claim 4, characterized in that: the bearing parts (122) of the two anchor rods (120) are connected and fixed through welding.
7. A foot-locking bolting construction with expansion bolt reinforcement according to claim 1, characterised in that: the expansion bolt (130) comprises a screw rod (131), one end of the screw rod (131) is provided with a conical head, the other end of the screw rod is provided with a central hole (1311), and one end, fixed with the expansion bolt (130), of the insertion part (121) is provided with an insertion column (123) inserted into the central hole (1311).
8. A foot-locking bolting construction with expansion bolt reinforcement according to claim 7, characterised in that: the inserted column (123) is fixedly connected with the central hole (1311) through threads.
9. A foot-locking bolting construction with expansion bolt reinforcement according to claim 1, characterised in that: the insertion portion (121) and the expansion bolt (130) are fixed by welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921597500.2U CN210660154U (en) | 2019-09-24 | 2019-09-24 | Lock foot anchor bolt supporting construction with expansion bolts is consolidated |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921597500.2U CN210660154U (en) | 2019-09-24 | 2019-09-24 | Lock foot anchor bolt supporting construction with expansion bolts is consolidated |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210660154U true CN210660154U (en) | 2020-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921597500.2U Expired - Fee Related CN210660154U (en) | 2019-09-24 | 2019-09-24 | Lock foot anchor bolt supporting construction with expansion bolts is consolidated |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210660154U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111622792A (en) * | 2020-06-19 | 2020-09-04 | 贾承志 | Foot locking anchor rod orienting device for tunnel construction |
| CN111720147A (en) * | 2020-06-19 | 2020-09-29 | 贾承志 | Orientation device for locking anchor rod |
| CN113775359A (en) * | 2021-08-24 | 2021-12-10 | 中铁广州工程局集团深圳工程有限公司 | Primary support reinforcing structure and method for expressway tunnel to penetrate through karst unfavorable geology |
-
2019
- 2019-09-24 CN CN201921597500.2U patent/CN210660154U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111622792A (en) * | 2020-06-19 | 2020-09-04 | 贾承志 | Foot locking anchor rod orienting device for tunnel construction |
| CN111720147A (en) * | 2020-06-19 | 2020-09-29 | 贾承志 | Orientation device for locking anchor rod |
| CN111622792B (en) * | 2020-06-19 | 2021-07-23 | 山西路桥第五工程有限公司 | Foot locking anchor rod orienting device for tunnel construction |
| CN111720147B (en) * | 2020-06-19 | 2021-07-30 | 贾承志 | Orientation device for locking anchor rod |
| CN113775359A (en) * | 2021-08-24 | 2021-12-10 | 中铁广州工程局集团深圳工程有限公司 | Primary support reinforcing structure and method for expressway tunnel to penetrate through karst unfavorable geology |
| CN113775359B (en) * | 2021-08-24 | 2024-01-19 | 中铁广州工程局集团深圳工程有限公司 | Highway tunnel through karst poor geological primary support reinforcing structure and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201102 Address after: 100844 Fuxing Road, Beijing, Haidian District, No. 10 Patentee after: China National Railway Group Co.,Ltd. Patentee after: CENTRAL SOUTH University Patentee after: CHINA RAILWAY GUANGZHOU GROUP Co.,Ltd. Patentee after: CHINA RAILWAY NO.3 ENGINEERING GROUP Co.,Ltd. Address before: 269 Yingze street, Yingze District, Taiyuan City, Shanxi Province Patentee before: CHINA RAILWAY NO.3 ENGINEERING GROUP Co.,Ltd. Patentee before: Shenzhen engineering construction headquarters of China Railway Guangzhou Bureau Group Co.,Ltd. Patentee before: CENTRAL SOUTH University |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200602 Termination date: 20210924 |
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| CF01 | Termination of patent right due to non-payment of annual fee |