CN210599049U - Lock foot anchor rod structure and tunnel strutting arrangement - Google Patents
Lock foot anchor rod structure and tunnel strutting arrangement Download PDFInfo
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- CN210599049U CN210599049U CN201921341410.7U CN201921341410U CN210599049U CN 210599049 U CN210599049 U CN 210599049U CN 201921341410 U CN201921341410 U CN 201921341410U CN 210599049 U CN210599049 U CN 210599049U
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Abstract
The utility model provides a lock foot stock structure relates to tunnel construction technical field. The foot-locking anchor rod structure comprises a baffle plate and a plurality of anchor rods; all stock all are fixed in the baffle through one end, and the other end of all stock extends towards same one side of baffle. The utility model discloses a lock foot stock structure owing to utilize the baffle to connect a plurality of stocks, not only can realize fixed connection with a plurality of stocks and arch steelframe, can increase the lifting surface area of arch steelframe and lock foot stock structure with baffle and arch steelframe welded fastening simultaneously, and lock foot stock structure can bear bigger pressure. On this basis, the utility model also provides a tunnel strutting arrangement, it is fixed with being connected of two at least lock foot anchor rod structures through the arch steelframe, provide sufficient support to the hunch foot in a face, avoided the hunch foot among the tunnel excavation engineering shrink or fall the arch accident.
Description
Technical Field
The utility model relates to a tunnel construction technical field particularly, relates to a lock foot stock structure and tunnel strutting arrangement.
Background
When a tunnel is excavated by a step method, in order to ensure the construction safety, 1 to 2 rows of anchor rods (or anchor pipes) are driven into the arch springing part perpendicular to the rock wall of the tunnel before the lower section is excavated so as to prevent the arch springing from contracting or falling, and the other end of each anchor rod is welded with an arch steel frame to form an integral stress system by common stress. The anchor rod is called a foot locking anchor rod, and the anchor rod is replaced by a hollow steel pipe in part of surrounding rock sections.
Once the foot-locking anchor rod is connected with the arched steel frame and falls off, personal injury and property loss are easily caused. This is a long standing problem in existing tunnel excavation projects.
In the prior art, the foot-locking anchor rod and the arched steel frame form a supporting stress system in a welding mode and are limited by the structural characteristics of the foot-locking anchor rod, the tail of the foot-locking anchor rod is welded with the arched steel frame after the foot-locking anchor rod is drilled, the strip-shaped foot-locking anchor rod and the planar arched steel frame end face can only be welded in a spot welding mode, the stress area of the foot-locking anchor rod and the arched steel frame is small, the bearing load is small, and arch springing or arch falling accidents are difficult to avoid.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a lock foot stock structure, its face of weld that can increase and arch steelframe provides bigger support load for the lock foot stock.
Another object of the utility model is to provide a tunnel strutting arrangement, it can provide sufficient support to the hunch foot in a face, avoids the hunch foot among the tunnel excavation engineering to shrink or fall and encircles the accident.
The embodiment of the utility model is realized like this:
a foot-locking anchor rod structure comprises a baffle plate and a plurality of anchor rod bodies; all the stock body is fixed in the baffle, all the length of stock body is towards the same side extension of baffle.
One end of the anchor rod body is used for being inserted into a rock wall, and the other end of the anchor rod body is fixedly arranged on the baffle. The area of baffle is great, can form the face contact with the terminal surface of arch steelframe. The baffle realizes fixed connection with the arch steelframe through welding mode or other connected modes, has increased the support load of lock foot stock structure, prevents that tunnel cliff from taking place the hunch foot shrink or falling the arch accident. It should be noted that the baffle plate and the arched steel frame are in surface contact, and the operation steps of firstly intermittent welding and then continuous welding are adopted to ensure the connection stress.
In the preferred embodiment of the present invention, the baffle is axially symmetrical, the number of the anchor rod bodies is even, and the even number of the anchor rod bodies is symmetrical to the baffle. The technical effects are as follows: the baffle is the axial symmetry shape, and a plurality of stock bodies of even number divide into two parts of equidistance, also for same symmetry axisymmetric distribution on the baffle, promptly after baffle and arch steelframe welded fastening, a plurality of stock bodies divide into two parts of equidistance, and these two parts stock body symmetrically distribute in the both sides of arch steelframe. At the moment, the force bearing points of the baffle and the anchor rod body are more uniform and balanced, and the situation of inclination or top bending is not easy to occur.
In a preferred embodiment of the present invention, the anchor body penetrates the baffle and is welded and fixed to the baffle. The technical effects are as follows: if the anchor body is only abutted against one side of the baffle plate through the tail end, on one hand, welding is difficult to carry out on site, on the other hand, the welding point is difficult to grasp, and the borne load is limited. The anchor rod body penetrates through the baffle plate to be welded, so that the anchor rod body is convenient to be directly welded on a construction site, the side wall of the anchor rod body and the through hole formed in the baffle plate can be welded more thickly to carry out 360-degree welding, and the welding quality can be ensured by adopting side welding when the anchor rod body is not closely attached to the through hole.
In the preferred embodiment of the present invention, the distance between the position where the baffle is connected to the anchor rod body and the outer edge of the baffle is greater than or equal to 1 cm. The technical effects are as follows: the stock body will support the atress through the baffle and transmit the arch steelframe, even the stock body is enough firm with the solder joint of baffle, also difficult avoid taking place the baffle and buckle and influenced bearing structure's stability. The above problems can be avoided when the position where the baffle contacts the anchor body is sufficiently large from the edge of the baffle. Practical construction tests show that the distance cannot be less than 1 cm.
In a preferred embodiment of the present invention, the thickness of the baffle is 10 cm to 20 cm. The technical effects are as follows: to ensure that the support load is sufficiently large, the shield should be designed thick enough, while to facilitate the welding operation and reduce the weight of the foot bolt structure, the shield should be designed thin. After long-term construction tests, the thickness of the baffle plate is 10-20 cm, and the most preferable thickness is 16 cm.
In a preferred embodiment of the present invention, the anchor body is a solid straight rod or a hollow straight rod. The technical effects are as follows: the anchor rod body of the solid straight rod is supported maximally, and the tensile compression resistance and the shearing force are also maximized, while the anchor rod body of the hollow straight rod is provided with a cavity which can be used for grouting into a rock wall.
In a preferred embodiment of the present invention, the cross-section of the anchor body is rectangular or circular. The technical effects are as follows: the anchor rod body with the rectangular cross section forms surface contact with the arched steel frame due to the fact that the side wall is a plane, and connection stability is higher after welding. The anchor rod body with the circular section is convenient to process, a rectangular hole does not need to be formed in the baffle, and the anchor rod body and the rectangular hole of the baffle do not need to be axially aligned and then welded.
A tunnel supporting device comprises an arched steel frame and at least two foot locking anchor rod structures, wherein a baffle is attached to the inner ring surface of the arched steel frame, and an anchor rod body extends towards the outer ring surface of the arched steel frame and exceeds the outer ring surface of the arched steel frame. Wherein, stock body one end is fixed in the baffle, and the other end extends to the outer anchor ring of arch steelframe from the interior anchor ring face of arch steelframe to exceed the height of whole arch steelframe web, so that the stock body can insert the tunnel cliff, plays the effect of supporting the hunch foot.
In a preferred embodiment of the present invention, the baffle is welded to the inner annular surface of the arched steel frame. The technical effects are as follows: the baffle realizes fixed connection with stock body and arch steelframe to the biggest as far as possible increases the stock body and the baffle, the baffle and the stress surface of arch steelframe, improves the bearable load of lock foot stock structure.
In the preferred embodiment of the present invention, the anchor body is attached to the arched steel frame and welded and fixed to the arched steel frame. The technical effects are as follows: when a plurality of stock body symmetric distribution are on the baffle, can be with the distance design between the stock body for the same with the width of arch steelframe, then the stock body homoenergetic of both sides can be connected with the laminating of arch steelframe, and welded fastening then has further improved the stability of being connected of lock foot stock structure and arch steelframe.
The embodiment of the utility model provides a beneficial effect is:
the utility model discloses a lock foot stock structure owing to utilize the baffle to connect a plurality of stock bodies, not only can realize fixed connection with a plurality of stock bodies and arch steelframe, can increase the lifting surface area of arch steelframe and lock foot stock structure with baffle and arch steelframe welded fastening simultaneously, and lock foot stock structure can bear bigger pressure.
The utility model discloses a tunnel strutting arrangement is fixed through being connected of arch steelframe and two at least lock foot anchor rod structures, provides sufficient support to the hunch foot in a face, has avoided the hunch foot among the tunnel excavation engineering to shrink or fall the arch accident.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a perspective view of a first structural form of a foot-locking anchor rod structure provided by the embodiment of the invention;
fig. 2 is a side view of a first structural form of a foot-locking anchor structure provided by the embodiment of the invention;
fig. 3 is a perspective view of a second structural form of the foot-locking anchor rod structure provided by the embodiment of the invention;
fig. 4 is a side view of a second structural form of the foot-locking anchor structure provided by the embodiment of the invention;
fig. 5 is a perspective view of a third structural form of the foot-locking anchor rod structure provided by the embodiment of the invention;
fig. 6 is a side view of a third structural form of the foot-locking anchor rod structure provided by the embodiment of the invention;
fig. 7 is a schematic view illustrating an installation of a tunnel supporting device according to an embodiment of the present invention;
fig. 8 is a schematic view of a connection position structure of the tunnel supporting device and the tunnel rock wall provided by the embodiment of the present invention.
In the figure: 1-a baffle plate; 2-anchor rod body; 3-an arch steel frame; 4-tunnel rock wall.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Fig. 1 is a perspective view of a first structural form of a foot-locking anchor rod structure provided by the embodiment of the invention; fig. 2 is a side view of a first structural form of a foot-locking anchor structure provided by the embodiment of the invention; fig. 3 is a perspective view of a second structural form of the foot-locking anchor rod structure provided by the embodiment of the invention; fig. 4 is a side view of a second structural form of the foot-locking anchor structure provided by the embodiment of the invention; fig. 5 is a perspective view of a third structural form of the foot-locking anchor rod structure provided by the embodiment of the invention; fig. 6 is a side view of a third structural form of the foot-locking anchor rod structure provided by the embodiment of the invention.
The first embodiment:
referring to fig. 1 to 6, the present embodiment provides a foot-locking anchor rod structure, which includes a baffle 1 and a plurality of anchor rod bodies 2; all stock bodies 2 are all fixed in baffle 1, and the length of all stock bodies 2 extends towards the same side of baffle 1.
The operating principle of the foot-locking anchor rod structure is that because one end of the anchor rod body 2 is used for inserting into a rock wall, the other end of the anchor rod body 2 is fixedly arranged on the baffle plate 1, and the baffle plate 1 is fixedly connected with an arched steel frame 3 for supporting a tunnel rock wall 4. Then the extrusion stress of tunnel cliff 4, gravity and other forces that lead to the hunch foot to contract easily or fall the arch will directly transmit arch steelframe 3 or transmit arch steelframe 3 through baffle 1 through stock body 2, play the supporting role through the fixed mounting of arch steelframe 3 on ground.
The contact area of the baffle plate 1 is larger than that of the pure anchor rod body 2, and the baffle plate can be in surface contact with the end face of the arched steel frame 3. Baffle 1 realizes fixed connection through welding mode or other connected mode and arch steelframe 3, has increased the support load of lock foot stock structure, prevents that tunnel cliff 4 from taking place the hunch foot shrink or falling the arch accident.
It should be noted that the baffle 1 and the arched steel frame 3 are in surface contact, and the operation steps of firstly intermittent welding and then continuous welding are adopted to ensure the connection stress.
In addition, the number of the anchor rod bodies 2 is at least two, so that the connection stability with the baffle plate 1 is improved.
Second embodiment:
referring to fig. 1 to 6, the present embodiment provides a foot-locking anchor rod structure, which is substantially the same as the foot-locking anchor rod structure of the first embodiment, and the difference between the foot-locking anchor rod structure and the first embodiment is that the baffle plate 1 of the foot-locking anchor rod structure of the present embodiment is in an axisymmetric shape, the number of the anchor rod bodies 2 is an even number, and the even number of the anchor rod bodies 2 are symmetrically distributed on the baffle plate 1 with respect to the symmetric axis of the baffle plate 1.
Wherein, the baffle 1 is square, rectangular, round or oval.
Wherein, the quantity of stock body 2 is 2, 4, 6 etc.. If the quantity of stock body 2 is 2, and when baffle 1 was the rectangle, about 2 stock bodies 2 respectively one, for baffle 1 symmetry axisymmetric fixed welding in the same one side of baffle 1, and 2 stock bodies 2 all are perpendicular with the connection face of baffle 1. If the quantity of stock body 2 is 6, and when baffle 1 was the square, about 6 stock bodies 2 respectively 3, for baffle 1 symmetry fixed welding on the same one side of baffle 1, stock body 2 all is perpendicular with the connection face of baffle 1.
The third embodiment:
referring to fig. 2, 4 and 6, the present embodiment provides a foot-locking anchor rod structure, which is substantially the same as the foot-locking anchor rod structure of the first embodiment or the second embodiment, and the difference between the foot-locking anchor rod structure and the foot-locking anchor rod structure is that the anchor rod body 2 of the foot-locking anchor rod structure of the present embodiment penetrates through the baffle plate 1 and is welded and fixed to the baffle plate 1.
Wherein, when the through-hole is the circular port, the latus rectum of this through-hole wants to coincide with the diameter of stock body 2, and when the through-hole was the rectangular hole, the size of this through-hole can just hold stock body 2. In the implementation process, firstly, a through hole is formed in the baffle plate 1, then the anchor rod body 2 penetrates through the baffle plate 1 through the through hole, and finally, the anchor rod body is welded and fixed. Because stock body 2 runs through the through-hole, so can both weld in the both sides of baffle 1 to the welding point is more complete. The welding can be carried out in a production workshop, and also can be carried out in a construction site or repair welding. Flexible use and convenient operation. At this time, since the pipe or rod is welded to the through hole, a mode of intermittent welding and then continuous welding can be adopted.
The fourth embodiment:
referring to fig. 1 to 6, the present embodiment provides a foot-locking anchor rod structure, which is substantially the same as the foot-locking anchor rod structure of the first, second or third embodiment, and the difference between the foot-locking anchor rod structure and the foot-locking anchor rod structure is that the distance between the position where the baffle plate 1 of the foot-locking anchor rod structure is connected to the anchor rod body 2 and the outer edge of the baffle plate 1 is greater than or equal to 1 cm.
Further, the thickness of the baffle 1 ranges from 10 cm to 20 cm.
The distance between the position where the baffle plate 1 is connected with the anchor rod body 2 and the outer edge of the baffle plate 1 is the minimum distance between the diameter of the through hole and the edge of the baffle plate 1 in the third embodiment.
In addition, the baffle 1 can be made of high-quality carbon structural steel plate with the thickness of 16 cm. The high-quality carbon structural steel has pure steel quality, less impurities and good mechanical property.
Fifth embodiment:
referring to fig. 1 to 6, the present embodiment provides a foot-locking anchor rod structure, which is substantially the same as the foot-locking anchor rod structure of the first, second, third or fourth embodiments, and the difference between the foot-locking anchor rod structure and the foot-locking anchor rod structure is that the anchor rod body 2 of the foot-locking anchor rod structure of the present embodiment is a solid straight rod or a hollow straight rod.
Further, the cross section of the anchor rod body 2 is rectangular or circular.
The anchor rod body 2 can be a solid straight rod or a hollow straight rod with a rectangular cross section, and can also be a solid straight rod or a hollow straight rod with a circular cross section.
Fig. 7 is a schematic view illustrating an installation of a tunnel supporting device according to an embodiment of the present invention; fig. 8 is a schematic view of a connection position structure between the tunnel supporting device and the tunnel rock wall 4 according to an embodiment of the present invention.
Sixth embodiment:
referring to fig. 7 and 8, the present embodiment provides a tunnel supporting device, which includes an arched steel frame 3 and at least two of the above-mentioned foot-locking anchor rod structures, wherein the baffle plate 1 is attached to the inner annular surface of the arched steel frame 3, and the anchor rod body 2 extends toward the outer annular surface of the arched steel frame 3 and exceeds the outer annular surface of the arched steel frame 3.
Further, the baffle 1 and the inner annular surface of the arched steel frame 3 are welded and fixed.
Further, the anchor rod body 2 is attached to the arched steel frame 3 and is welded and fixed with the arched steel frame 3.
Wherein, 2 one ends of stock body are fixed in baffle 1, and the other end extends to the outer anchor ring of arch steelframe 3 from the interior anchor ring of arch steelframe 3 to exceed the height of 3 webs of whole arch steelframe, so that the stock body 2 can insert tunnel cliff 4, plays the effect of supporting the hunch foot.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, 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 invention should be included in the protection scope of the present invention.
Claims (7)
1. A tunnel supporting device is characterized by comprising an arched steel frame and at least two foot locking anchor rod structures; the foot locking anchor rod structure comprises a baffle plate and a plurality of anchor rod bodies; all the anchor rod bodies are fixed on the baffle plate, and the length of all the anchor rod bodies extends towards the same side of the baffle plate; the baffle plate is attached to the inner ring surface of the arched steel frame, and the anchor rod body extends towards the outer ring surface of the arched steel frame and exceeds the outer ring surface of the arched steel frame; the baffle plate is welded and fixed with the inner ring surface of the arched steel frame; the anchor rod body is attached to the arched steel frame and fixedly welded with the arched steel frame.
2. The tunnel supporting device according to claim 1, wherein the baffle is in an axisymmetric shape, the number of the anchor rod bodies is even, and the even number of the anchor rod bodies are symmetrically distributed on the baffle relative to the symmetric axis of the baffle.
3. The tunnel support apparatus of claim 1, wherein the anchor body extends through the shield and is welded to the shield.
4. The tunnel support apparatus of claim 1, wherein the baffle is connected to the anchor body at a distance greater than or equal to 1 cm from an outer edge of the baffle.
5. The tunnel support apparatus of claim 1, wherein the thickness of the baffle is in the range of 10 cm to 20 cm.
6. The tunnel support apparatus of claim 1, wherein the anchor body is a solid straight rod or a hollow straight rod.
7. The tunnel support apparatus of claim 1, wherein the bolt body is rectangular or circular in cross-section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921341410.7U CN210599049U (en) | 2019-08-16 | 2019-08-16 | Lock foot anchor rod structure and tunnel strutting arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921341410.7U CN210599049U (en) | 2019-08-16 | 2019-08-16 | Lock foot anchor rod structure and tunnel strutting arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210599049U true CN210599049U (en) | 2020-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921341410.7U Active CN210599049U (en) | 2019-08-16 | 2019-08-16 | Lock foot anchor rod structure and tunnel strutting arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210599049U (en) |
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2019
- 2019-08-16 CN CN201921341410.7U patent/CN210599049U/en active Active
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