CN212837883U - Locking device of soft surrounding rock steel arch center - Google Patents
Locking device of soft surrounding rock steel arch center Download PDFInfo
- Publication number
- CN212837883U CN212837883U CN202021161217.8U CN202021161217U CN212837883U CN 212837883 U CN212837883 U CN 212837883U CN 202021161217 U CN202021161217 U CN 202021161217U CN 212837883 U CN212837883 U CN 212837883U
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- steel
- surrounding rock
- bow member
- backing plate
- locking device
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 135
- 239000010959 steel Substances 0.000 title claims abstract description 135
- 239000011435 rock Substances 0.000 title claims abstract description 54
- 238000012856 packing Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 description 10
- 238000003466 welding Methods 0.000 description 7
- 101150097977 arch-1 gene Proteins 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004567 concrete Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Lining And Supports For Tunnels (AREA)
Abstract
The utility model discloses a locking device of soft surrounding rock steel bow member, including steel bow member, a plurality of anchor pipe and locking foot subassembly, the locking foot subassembly includes stiffening backing plate and lock nut, the steel bow member with all set up a plurality of through-holes that supply on the stiffening backing plate the anchor pipe passes through, the first end of anchor pipe be equipped with lock nut complex external screw thread, the second end of anchor pipe is worn to locate in proper order through-hole on stiffening backing plate and the steel bow member and is anchored in the soft surrounding rock; the device can strengthen the connection strength among the steel arch, the anchor pipe and the weak surrounding rock, and strengthen the safety and the reliability of the steel arch.
Description
Technical Field
The utility model relates to a tunnel steel bow member struts technical field, concretely relates to locking foot device of weak surrounding rock steel bow member.
Background
After the tunnel is excavated, the original balance state of the weak surrounding rock is broken, the surrounding rock and the vault at the periphery generate plastic change and relaxation, in order to prevent the excessive displacement and deformation of the weak surrounding rock after the excavation disturbance and reduce the sinking and convergence, a reasonable supporting structure is required to restrict and bear the pressure of the weak surrounding rock, the steel arch frame is an important component in the primary supporting structure of the weak and loess surrounding rock tunnel and is also an important content of the supporting before the concrete secondary lining construction of the tunnel, although the arch frame has certain rigidity, strength and bearing capacity, the deformation of the surrounding rock can be effectively controlled before the strength of the sprayed concrete is not reached, and the stratum pressure and the restrained deformation are borne.
At present, soft rock tunnels are usually excavated step by step, and the stability of a primary supporting structure is ensured, so that the primary supporting structure plays an important role in ensuring the construction safety. However, due to the limitation of the step-by-step tunnel excavation process, the steel arch frames also need to be installed step by step, generally speaking, after the upper arch frame is installed, the lower surrounding rock is excavated and the lower steel arch frame is installed, but after the lower surrounding rock is excavated and before the lower steel arch frame is installed, the end of the upper steel arch frame loses support, so that a special locking device is often needed to ensure the stability of the end of the steel arch frame.
In the prior art, the stability of the steel arch is often ensured by a method of welding the steel arch and the foot locking anchor rods, but the construction environment in a tunnel is severe, such as high dust concentration, large water seepage amount, large air humidity, poor visibility and the like, which can cause serious influence on welding quality, such as welding failure and welding leakage, which can cause that the welding quality cannot be ensured, the fixing capacity is poor, and meanwhile, due to the limitation of the site construction process, effective symmetry cannot be realized in the fixation of the steel arch, and a deflection site is easy to generate. Part of welding seams can be damaged after being stressed, and further arch support failure can be caused, so that the surrounding rock of the arch is excessively settled and even collapses can be caused. The welding method adopted in the tunnel can increase the construction time and also influence the construction safety.
Therefore, it is urgently needed to design a reinforced connecting device with strong stability and high safety factor to solve the problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a locking foot device of weak surrounding rock steel bow member can strengthen the joint strength between steel bow member, anchor pipe and the weak surrounding rock, strengthens the security and the reliability of steel bow member to solve the technical problem who mentions in the background art.
The purpose of the utility model is realized through the following technical scheme:
the utility model provides a weak surrounding rock steel bow member's lock foot device, includes steel bow member, a plurality of anchor pipe and lock foot subassembly, the lock foot subassembly includes stiffening backing plate and lock nut, the steel bow member with all seted up a plurality of confessions on the stiffening backing plate the through-hole that the anchor pipe passes through, the first end of anchor pipe be equipped with lock nut complex external screw thread, the second end of anchor pipe is worn to locate in proper order through-hole and anchor on stiffening backing plate and the steel bow member in the weak surrounding rock.
Further, the steel bow member is the I shape bow member, the steel bow member includes first vertical steel sheet, binding steel plate and the vertical steel sheet of second, first vertical steel sheet with the vertical steel sheet parallel arrangement of second, binding steel plate's first end with first vertical steel sheet is connected, binding steel plate's second end with the vertical steel sheet of second is connected.
Further, the lengths of the first vertical steel plate, the connecting steel plate and the second vertical steel plate are equal.
Furthermore, the through holes are symmetrically formed in the first vertical steel plate and the second vertical steel plate.
Furthermore, a washer is arranged between the locking nut and the stiffening backing plate, the washer is a steel ring, and the diameter of the washer is larger than the outer diameter of the locking nut.
Furthermore, the stiffening backing plate is a steel backing plate, and the thickness of the stiffening backing plate is 1.5-2.0 mm.
Furthermore, the number of anchor pipes is 4 and divide into two sets ofly, and every group the anchor pipe respectively wear to locate in proper order through-hole on stiffening backing plate and the steel bow member and anchor in weak country rock.
Further, the second end of the anchor tube is tapered.
The utility model has the advantages that:
the utility model discloses a locking foot device of weak surrounding rock steel bow member, realize connecting through the locking foot subassembly between its steel bow member and the anchor pipe, adopt the mode of mechanical assembly to replace traditional welded connection mode promptly, the locking foot subassembly can strengthen the joint strength between steel bow member and the weak surrounding rock and then strengthen the whole stability of weak surrounding rock steel bow member, when weak surrounding rock pressure increases, the whole that forms between anchor pipe and the steel bow member can bear sufficient pressure and can not break phenomenon, thereby can resist the surrounding rock and warp, the overall stability has been strengthened, the construction process has been simplified, the construction time has been reduced, construction safety has also been improved; first vertical steel sheet with the mode that the vertical steel sheet upper end through-hole of second adopted the symmetry is arranged, the through-hole is used for inserting and establishes the anchor pipe, and the anchor pipe is the anchor in weak country rock, therefore the anchor pipe also symmetrical formula connect in first vertical steel sheet with on the vertical steel sheet of second to realize the effect of the displacement between restriction steel bow member and the weak country rock.
Drawings
Fig. 1 is a schematic view of the overall structure of the leg locking device of the soft surrounding rock steel arch of the utility model;
fig. 2 is a side view of the leg locking device of the soft surrounding rock steel arch of the utility model;
in the figure, 1-steel arch frame, 101-first vertical steel plate, 102-connecting steel plate, 103-second vertical steel plate, 2-anchor pipe, 3-stiffening backing plate, 4-locking nut, 5-through hole, 6-weak surrounding rock and 7-gasket.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
Referring to fig. 1-2, the present invention provides a technical solution:
please refer to fig. 1-2, a leg locking device of a soft surrounding rock 6 steel arch 1, comprising a steel arch 1, a plurality of anchor pipes 2 and a leg locking component, wherein the leg locking component comprises a stiffening backing plate 3 and a locking nut 4, a plurality of through holes 5 for the anchor pipes 2 to pass through are arranged on the steel arch 1 and the stiffening backing plate 3, a first end of the anchor pipe 2 is provided with an external thread matched with the locking nut 4, and a second end of the anchor pipe 2 sequentially penetrates through the stiffening backing plate 3 and the through holes 5 on the steel arch 1 and is anchored in the soft surrounding rock 6.
The utility model discloses a locking foot device of soft surrounding rock 6 steel bow member 1, realize connecting through the locking foot subassembly between its steel bow member 1 and the anchor pipe 2, the mode that has adopted mechanical equipment replaces traditional welded connection mode promptly, the locking foot subassembly can strengthen the joint strength between steel bow member 1 and the soft surrounding rock 6 and then strengthen the holistic stability of soft surrounding rock 6 steel bow member 1, when the increase of soft surrounding rock 6 pressure, the whole that forms between anchor pipe 2 and the steel bow member 1 can bear sufficient pressure and can not take place cracked phenomenon, thereby can resist the surrounding rock deformation, strengthen holistic stability, simplify the work progress, reduce the engineering time, also can improve construction safety nature.
Referring to fig. 1, the steel arch 1 is an i-shaped arch, the steel arch 1 includes a first vertical steel plate 101, a connection steel plate 102 and a second vertical steel plate 103, the first vertical steel plate 101 and the second vertical steel plate 103 are arranged in parallel, a first end of the connection steel plate 102 is connected to the first vertical steel plate 101, and a second end of the connection steel plate 102 is connected to the second vertical steel plate 103.
The utility model discloses I shape bow member adopts first vertical steel sheet 101, connector plate 102 and the vertical steel sheet 103 interconnect's of second mode, and the stability of the overall structure of multiplicable steel bow member 1 is convenient for install anchor pipe 2 and lock foot device moreover.
Referring to fig. 1, the lengths of the first vertical steel plate 101, the connecting steel plate 102 and the second vertical steel plate 103 are equal.
The utility model discloses a three component part of I shape bow member, first vertical steel sheet 101, connecting steel plate 102 and the vertical steel plate 103's of second length equals promptly, can guarantee the stability when connecting the installation between each I shape bow member, and connecting steel plate 102 can strengthen the intensity of single pin I shaped steel bow member itself.
Referring to fig. 1, the through holes 5 are symmetrically formed in the first vertical steel plate 101 and the second vertical steel plate 103.
The utility model discloses first vertical steel sheet 101 with the mode of symmetry is arranged to vertical steel sheet 103 upper end through-hole 5 of second, through-hole 5 is used for inserting and establishes anchor pipe 2, and anchor pipe 2 is the anchor in weak country rock 6, therefore anchor pipe 2 also symmetrical type connect in first vertical steel sheet 101 with on the vertical steel sheet 103 of second to realize the effect of the displacement between restriction steel bow member 1 and the weak country rock 6.
Referring to fig. 1-2, a washer 7 is disposed between the lock nut 4 and the stiffening shim plate 3, the washer 7 is a steel ring, and the diameter of the washer 7 is larger than the outer diameter of the lock nut 4.
The utility model discloses a 7 multiplicable lock nuts 4 of packing ring and the area of contact of stiffening backing plate 3 let packing ring 7 and contact can inseparable link together, the power of effect so also can corresponding less than, also be more easy not hard up, also start the effect of locking more easily simultaneously.
Preferably, the stiffening backing plate 3 is a steel backing plate, and the thickness of the stiffening backing plate 3 is 1.5-2.0 mm.
The utility model discloses a thickness is 1.5 ~ 2.0 mm's steel backing plate preparation stiffening backing plate 3, can guarantee sufficient intensity and hardness.
Preferably, the number of the anchor pipes 2 is 4 and is divided into two groups, and each group of the anchor pipes 2 sequentially penetrate through the stiffening backing plate 3 and the through holes 5 on the steel arch frame 1 and are anchored on the weak surrounding rock 6.
The utility model discloses two sets of 4 anchor pipes 2 fall into the symmetry, wear to establish in proper order through-hole 5 and anchor on stiffening backing plate 3 and the steel bow member 1 in weak country rock 6 realizes the stable connection between steel bow member 1 and the weak country rock 6.
Preferably, the second end of the anchor tube 2 is tapered.
The second end of the anchor pipe 2 of the utility model is set to be a cone shape, so as to anchor rapidly in the weak surrounding rock 6.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (8)
1. The utility model provides a leg locking device of weak surrounding rock steel bow member which characterized in that: including steel bow member (1), a plurality of anchor pipe (2) and lock foot subassembly, the lock foot subassembly includes stiffening backing plate (3) and lock nut (4), steel bow member (1) with all seted up a plurality of confessions on stiffening backing plate (3) through-hole (5) that anchor pipe (2) pass through, the first end of anchor pipe (2) be equipped with lock nut (4) complex external screw thread, the second end of anchor pipe (2) is worn to locate in proper order through-hole (5) and anchor on stiffening backing plate (3) and steel bow member (1) are in weak country rock (6).
2. The locking device for the weak surrounding rock steel arch frame according to claim 1, wherein: steel bow member (1) is the I shape bow member, steel bow member (1) includes first vertical steel sheet (101), binding steel sheet (102) and second vertical steel sheet (103), first vertical steel sheet (101) with second vertical steel sheet (103) parallel arrangement, binding steel sheet (102) first end with first vertical steel sheet (101) are connected, binding steel sheet (102) second end with second vertical steel sheet (103) are connected.
3. The locking device for the weak surrounding rock steel arch frame of claim 2, wherein: the lengths of the first vertical steel plate (101), the connecting steel plate (102) and the second vertical steel plate (103) are equal.
4. The locking device for the weak surrounding rock steel arch frame of claim 2, wherein: the through holes (5) are symmetrically formed in the first vertical steel plate (101) and the second vertical steel plate (103).
5. The locking device for the weak surrounding rock steel arch frame according to claim 1, wherein: the locking nut (4) with be equipped with packing ring (7) between stiffening backing plate (3), packing ring (7) are the steel circle, the diameter of packing ring (7) is greater than the external diameter of locking nut (4).
6. The locking device for the weak surrounding rock steel arch frame according to claim 1, wherein: the stiffening backing plate (3) be the steel backing plate, the thickness of stiffening backing plate (3) is 1.5 ~ 2.0 mm.
7. The locking device for the weak surrounding rock steel arch frame according to claim 1, wherein: the quantity of anchor pipe (2) is 4 and divide into two sets ofly, every group anchor pipe (2) wear to locate in proper order respectively through-hole (5) on stiffening backing plate (3) and the steel bow member (1) and anchor in weak country rock (6).
8. The locking device for the weak surrounding rock steel arch frame according to claim 1, wherein: the second end of the anchor pipe (2) is in a conical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021161217.8U CN212837883U (en) | 2020-06-19 | 2020-06-19 | Locking device of soft surrounding rock steel arch center |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021161217.8U CN212837883U (en) | 2020-06-19 | 2020-06-19 | Locking device of soft surrounding rock steel arch center |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212837883U true CN212837883U (en) | 2021-03-30 |
Family
ID=75175617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021161217.8U Expired - Fee Related CN212837883U (en) | 2020-06-19 | 2020-06-19 | Locking device of soft surrounding rock steel arch center |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212837883U (en) |
-
2020
- 2020-06-19 CN CN202021161217.8U patent/CN212837883U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210330 |
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| CF01 | Termination of patent right due to non-payment of annual fee |