CN212003215U - Tunnel lock foot steel pipe initiative bearing system - Google Patents
Tunnel lock foot steel pipe initiative bearing system Download PDFInfo
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- CN212003215U CN212003215U CN202020285416.3U CN202020285416U CN212003215U CN 212003215 U CN212003215 U CN 212003215U CN 202020285416 U CN202020285416 U CN 202020285416U CN 212003215 U CN212003215 U CN 212003215U
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- steel pipe
- pushing mechanism
- lock
- bearing system
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Abstract
The active bearing system for the tunnel lock leg steel pipe comprises a reaction ring, a pressure applying device and a pushing mechanism, wherein the reaction ring is arranged right above the lock leg steel pipe and fixed on I-shaped steel, the pressure applying device is in contact with the lock leg steel pipe, the pushing mechanism applies downward force to the pressure applying device so as to push the lock leg steel pipe downwards, one end of the pushing mechanism is hinged to the reaction ring, and the other end of the pushing mechanism is hinged to the pressure applying device. Adopt the utility model provides a system and method can realize that the lock foot steel pipe initiatively bears, and the lock foot steel pipe can not become invalid because of too big deformation, simple to operate, and material consumption is few, low cost.
Description
Technical Field
The utility model relates to a tunnel and underground works field specifically are a tunnel lock foot steel pipe initiative bearing system.
Background
The locking steel pipe is an important method for controlling the settlement of the primary supporting structure of the tunnel. The foot locking steel pipe is usually a seamless steel pipe with the diameter of 42 mm-108 mm, the outer end of the foot locking steel pipe is welded with I-shaped steel of primary support, and the inner end of the foot locking steel pipe is inserted into a rock-soil body. When the primary support I-shaped steel is settled downwards, the outer end of the steel pipe inserted into the rock-soil body is synchronously displaced downwards, so that the steel pipe is bent to provide an upward supporting force. According to the traditional construction method, the lock leg steel pipe is directly welded with the steel arch after being driven into the steel arch, the lock leg steel pipe is deformed to exert the bearing capacity only when the I-steel is settled, and the lock leg steel pipe can provide larger bearing capacity only when the I-steel is settled greatly, so that the lock leg steel pipe is in a passive bearing mode. And the I-steel takes place great settlement, often means tunnel country rock takes place to warp by a wide margin and even destroys, very is unfavorable for tunnel country rock and supporting construction's stability. Therefore, for the tunnel which is easy to deform greatly, it is necessary to make the lock leg steel tube actively provide bearing capacity, and provide supporting force to control the deformation of the i-shaped steel and the surrounding rock when the i-shaped steel and the surrounding rock do not deform by settlement.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the passive bearing of tunnel lock foot steel pipe lead to it can not provide the holding power as early as possible, be unfavorable for control I-steel and the problem that the country rock subsides, provide one kind and provide the counter-force through the I-steel, the initiative makes the lock foot steel pipe crooked to provide the tunnel lock foot steel pipe initiative load-bearing system of holding power immediately.
The utility model comprises the following embodiments:
the active bearing system for the tunnel lock leg steel pipe comprises a reaction ring, a pressure applying device and a pushing mechanism, wherein the reaction ring is arranged right above the lock leg steel pipe and fixed on I-shaped steel, the pressure applying device is in contact with the lock leg steel pipe, the pushing mechanism applies downward force to the pressure applying device so as to push the lock leg steel pipe downwards, one end of the pushing mechanism is hinged to the reaction ring, and the other end of the pushing mechanism is hinged to the pressure applying device.
This embodiment is when using, and the arc of with biasing means is executed the clamp plate cladding and is being locked the end of foot steel pipe, starts the extending structure of pushing mechanism, and through biography power steel pipe promotion arc and is executed the clamp plate downward displacement, make the foot steel pipe take place the downwarping, controls the holding power on the I-steel from this to can control the deformation of country rock, compare traditional construction method, the utility model discloses material consumption is few, and is with low costs, can provide the bearing capacity after making the installation of lock foot steel pipe.
In this embodiment, the reaction ring is a reaction steel plate with a center circular hole.
In this embodiment, the pushing mechanism includes a telescopic structure, and an upper connecting member and a lower connecting member respectively fixedly connected to the upper end and the lower end of the telescopic structure.
In this embodiment, the telescopic structure is a mechanical, electric or hydraulic push rod.
In this embodiment, the pressing device comprises a force transmission steel plate with a central circular hole and an arc-shaped pressing plate, the arc-shaped pressing plate is fixed at the bottom of the force transmission steel plate, and an arc-shaped positioning groove matched with the outer diameter of the lock pin steel pipe is formed in one side, facing the lock pin steel pipe, of the arc-shaped pressing plate.
In this embodiment, the upper connecting member of the pushing mechanism is rotatably connected to the reaction ring through a rotating shaft, and the lower connecting member is rotatably connected to the force transmission steel plate through a rotating shaft.
To sum up, the utility model discloses a thrustor makes the lock foot steel pipe take place the moderate degree before I-steel and country rock subside to warp, and the initiative provides the holding power for the I-steel, is favorable to restraining that the country rock warp not hard up, realizes through thrustor's stroke that the I-steel subsides the deflection dynamic adaptation with the lock foot steel pipe, and the deformation and the bearing capacity of lock foot steel pipe can dynamic regulation, also can not subside inefficacy because of the I-steel is too big, the utility model discloses installation work volume is little, convenient operation, and material consumption is little, low cost.
Drawings
Fig. 1 is the schematic diagram of the active bearing system of the tunnel lock leg steel tube of the present invention.
Fig. 2 is a front view and a side view of the reaction ring of the present invention.
Fig. 3 is a front view and a side view of the pushing mechanism of the present invention.
Fig. 4 is a front view and a side view of the pressing device of the present invention.
In the figure: 1-locking steel pipe; 11-deformed lock pin steel pipe; 2-a reaction ring; 3-a pushing mechanism; 4-a pressure applying device; 5-surrounding rock; 6-I-steel; 21-a central circular hole; 22-reaction steel plate; 31-upper connecting piece; 32-lower connector; 33-a telescopic structure; 41-force transmission steel plate; 42-arc pressing plate.
Detailed Description
For a better understanding of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and the embodiments, however, the present invention is not limited thereto, and the protection scope of the present invention also relates to the equivalent technical means that can be conceived by those skilled in the art according to the inventive concept.
Referring to fig. 1 to 4, an active bearing system for a tunnel lock leg steel pipe comprises a lock leg steel pipe 1, a reaction ring 2, a pushing mechanism 3 and a pressing device 4. The reaction ring 2 is a reaction steel plate 22 with a central round hole 21, and the thickness of the reaction steel plate 22 meets the bearing requirement. The pushing mechanism 3 comprises a telescopic structure 33, and an upper connecting piece 31 and a lower connecting piece 32 which are respectively and fixedly connected to one end of the telescopic structure 33, wherein the telescopic structure can be a mechanical, electric or hydraulic push rod, and the embodiment adopts a mechanical push rod. The pressing device 4 is formed by welding a force transmission steel plate 41 with a central circular hole and an arc pressing plate 42, the upper connecting piece 31 of the pushing mechanism is rotatably connected to the reaction ring 2 through a rotating shaft, the lower connecting piece 32 is rotatably connected to the force transmission steel plate 41 through a rotating shaft, and an arc positioning groove matched with the outer diameter of the lock pin steel pipe 1 is formed in one side, facing the lock pin steel pipe 1, of the arc pressing plate 42, so that the pressure is closely transferred.
In tunnel construction, install I-steel 6 after 5 excavations of country rock, when 5 weak, poor stability of country rock, deformation such as downward subside can take place for 5 and I-steel 6 of country rock, can collapse when serious, need lock foot steel pipe 1 to provide the bearing force this moment. According to traditional approach, direct and I-steel 6 welding behind the construction of lock foot steel pipe 1, only when I-steel 6 subsides the back downwards, lock foot steel pipe 1 takes place to warp in step and provides the holding power, warp more greatly, the holding power is big more, warp and exceed the certain limit, and lock foot steel pipe 1 takes place to destroy and becomes invalid, and the utility model discloses a holding power can be controlled to following mode:
a method for actively bearing a tunnel lock leg steel pipe comprises the steps of firstly welding a reaction ring 2 on an I-shaped steel 6, driving a lock leg steel pipe 1 into a surrounding rock 5, then connecting a pushing mechanism 3 and a pressing device 4 on the reaction ring 2, wherein the distance between the reaction ring 2 and the tail end of the lock leg steel pipe 1 is the minimum value of the pushing mechanism 3. The arc pressing plate 42 of the pressing device 4 is coated at the tail end of the lock pin steel pipe 1, the telescopic structure 33 of the pushing mechanism 3 is started, the arc pressing plate 42 is pushed to move downwards through the force transmission steel pipe 41, the lock pin steel pipe 1 is bent downwards, and the deformed lock pin steel pipe 11 is formed. Corresponding bearing forces can thus be obtained on the i-beam 6 for controlling the deformation of the surrounding rock 5. In the next construction step, the surrounding rock 5 and the I-steel 6 can be settled downwards, and if the telescopic structure 33 is not adjusted, the leg locking steel pipe 1 can be deformed continuously. At this time, the telescopic structure 33 can be partially contracted according to the ultimate deformation capacity of the lock leg steel pipe 1, so that the deformation of the lock leg steel pipe 1 is within the allowable range, and the lock leg steel pipe is not damaged or failed. After the surrounding rock 5 and the I-steel 6 are stable or the subsequent construction is finished, the lock leg steel pipe 1 and the I-steel 6 are firmly welded, the telescopic structure 33 is contracted, and the pushing mechanism 3 and the pressing device 4 can be detached for subsequent full use. Compare traditional construction method, the utility model discloses the material consumption that increases is reaction ring 2, and the material consumption is few, and is with low costs.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. The utility model provides a tunnel lock foot steel pipe initiative bearing system which characterized in that: the pushing mechanism comprises a reaction ring which is arranged right above the lock pin steel pipe and fixed on the I-shaped steel, a pressing device which is in contact with the lock pin steel pipe, and a pushing mechanism which gives downward force to the pressing device so as to push the lock pin steel pipe downwards, wherein one end of the pushing mechanism is hinged on the reaction ring, and the other end of the pushing mechanism is hinged with the pressing device.
2. The active bearing system of the tunnel lock foot steel pipe of claim 1 is characterized in that: the reaction ring is a reaction steel plate with a central round hole.
3. The active bearing system of the tunnel lock foot steel pipe of claim 2 is characterized in that: the pushing mechanism comprises a telescopic structure, and an upper connecting piece and a lower connecting piece which are respectively and fixedly connected to the upper end and the lower end of the telescopic structure.
4. The active bearing system of the tunnel lock foot steel pipe of claim 3 is characterized in that: the telescopic structure is a mechanical, electric or hydraulic push rod.
5. The active bearing system of the tunnel lock foot steel pipe of claim 1 is characterized in that: the pressing device comprises a force transmission steel plate with a central circular hole and an arc pressing plate, the arc pressing plate is fixed at the bottom of the force transmission steel plate, and an arc positioning groove matched with the outer diameter of the lock leg steel pipe is formed in one side, facing the lock leg steel pipe, of the arc pressing plate.
6. The active bearing system of the tunnel lock foot steel pipe of claim 5 is characterized in that: the upper connecting piece of the pushing mechanism is rotatably connected to the reaction ring through a rotating shaft, and the lower connecting piece is rotatably connected to the force transmission steel plate through a rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020285416.3U CN212003215U (en) | 2020-03-10 | 2020-03-10 | Tunnel lock foot steel pipe initiative bearing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020285416.3U CN212003215U (en) | 2020-03-10 | 2020-03-10 | Tunnel lock foot steel pipe initiative bearing system |
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| CN212003215U true CN212003215U (en) | 2020-11-24 |
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| CN202020285416.3U Active CN212003215U (en) | 2020-03-10 | 2020-03-10 | Tunnel lock foot steel pipe initiative bearing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664237A (en) * | 2020-12-29 | 2021-04-16 | 宁波朗达工程科技有限公司 | Tunnel support acting force adjusting device and method |
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2020
- 2020-03-10 CN CN202020285416.3U patent/CN212003215U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664237A (en) * | 2020-12-29 | 2021-04-16 | 宁波朗达工程科技有限公司 | Tunnel support acting force adjusting device and method |
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