CN210622819U - Pipe shed and steel support combined supporting device - Google Patents
Pipe shed and steel support combined supporting device Download PDFInfo
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- CN210622819U CN210622819U CN201921753963.3U CN201921753963U CN210622819U CN 210622819 U CN210622819 U CN 210622819U CN 201921753963 U CN201921753963 U CN 201921753963U CN 210622819 U CN210622819 U CN 210622819U
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Abstract
The utility model discloses a pipe shed and steel support combined supporting device, including first steel support, second steel support and pipe shed, first steel support, the second steel support all includes arch steel canopy roof beam and fixed the setting in left steel canopy pillar and the right steel canopy pillar of arch steel canopy roof beam lower extreme, between the left steel canopy pillar of first steel support and the left steel canopy pillar of second steel support, all be connected with side connection girder steel and side protection network between the right steel canopy pillar of first steel support and second steel support, the pipe shed inserts the steel pipe to one side in the tunnel top surface rock body by many first sections slopes and constitutes, the middle section of inserting the steel pipe to one side is pressed and is arranged in the up end of the arch steel canopy roof beam of first steel support, the rear end of inserting the steel pipe to one side is chosen and is arranged in the bottom surface of the arch steel canopy roof beam of second steel support, the fixed top protection network that is provided with in below of pipe shed. The utility model discloses the efficiency of construction is high, can effectively restrain the country rock not hard up and collapse, maintains the stability in tunnel, can play better supporting effect.
Description
Technical Field
The utility model relates to a mining device and method technical field, concretely relates to pipe shed and steel support combined supporting device.
Background
During construction, the main haulage roadway penetrates through a geological abnormal area formed by faults. The fault rock is gray, is cemented by mud, is loose and fragile, and is easy to weather. Is in the form of powder or broken block, and is in the form of mud when it is in contact with water. The geological structure zone rock mass is mostly soft, broken and poor in cementation, is easy to disintegrate and soften when meeting water, rapidly expands in volume after being softened when meeting water, generates larger expansion pressure, enables a roadway to generate large deformation, causes too large deformation of the roadway during tunneling, has the phenomenon of 'mud-rock flow', causes great difficulty for construction and supporting work, and has great potential safety hazards.
During the development process from shallow to deep, along with the increasing ground pressure from shallow to deep, the phenomena of roof fall, rib spalling and the like frequently occur when a tunnel is excavated in the surrounding rock, and the tunnel is difficult to support. To the supporting in this type of tunnel, there are with high costs, intensity of labour is big, and the operation flow is complicated, and the operation cycle is long, the big scheduling problem of potential safety hazard in the concrete placement mode of adoption tradition. In addition, the blasting vibration in the mining production process can further damage and deform the rock mass which is deformed originally, so that the deformation and the damage of the roadway are aggravated.
The time effect of the surrounding rock from deformation to failure comprises two aspects of the time effect of gradual release of the stress of the surrounding rock and the inherent rheological effect of the surrounding rock medium. The excavation speed determines the time effect, and along with the continuous forward propulsion of the working face, the rheological effect of the rock mass is continuously developed. After the releasing of the load of the surrounding rock is finished, the rheological effect of the rock mass of the excavation face disappears, and at the moment, the deformation speed of the surrounding rock is accelerated, so that the surrounding rock enters a viscoplastic yield stage. At this time, the working face must be supported, otherwise the whole surrounding rock is damaged.
Therefore, the support is a safety technical measure such as support, reinforcement and protection for ensuring the stability of surrounding rocks and the safety of construction after underground engineering excavation and preventing the phenomena of surrounding rock collapse, stone falling and the like. The supporting device for the rapid excavation process of the broken soft rock roadway, which can effectively inhibit the loosening and the collapse of surrounding rocks, maintain the stability of the roadway and play a better supporting role, is urgently needed in the prior art.
Disclosure of Invention
The utility model aims at overcoming the not enough of prior art existence, provide one kind can effectively restrain the surrounding rock not hard up with collapse, maintain the stability in tunnel, can play better supporting effect, be applicable to the pipe shed and the combined supporting device of steel support of broken soft rock tunnel rapid excavation process.
The utility model aims at realizing through the following technical scheme: a combined supporting device of a pipe shed and a steel support comprises a first steel support, a second steel support and the pipe shed, wherein the first steel support and the second steel support respectively comprise an arched steel shed beam, a left steel shed pillar and a right steel shed pillar which are fixedly arranged at the lower end of the arched steel shed beam, a side connecting steel beam and a side protective net are connected between the left steel shed pillar of the first steel support and the left steel shed pillar of the second steel support, a side connecting steel beam and a side protective net are connected between the right steel shed pillar of the first steel support and the right steel shed pillar of the second steel support, the pipe shed is composed of a plurality of obliquely inserted steel pipes of which the front half sections are obliquely inserted into a top rock body of a roadway, the obliquely inserted steel pipes are pressed on the upper end surface of the arched steel shed beam of the first steel support, the rear ends of the obliquely inserted steel pipes are chosen and arranged on the bottom surface of the arched steel shed beam of the second steel support, the oblique inserting steel pipes are welded with the upper end face of the arched steel shed beam of the first steel support and the bottom face of the arched steel shed beam of the second steel support, and a top protective net is fixedly arranged between the arched steel shed beam of the first steel support and the arched steel shed beam of the second steel support below the pipe shed.
And the lower end of the left steel shed pillar and the lower end of the right steel shed pillar are provided with supporting plate-shaped bottom feet.
And the lower end of the pipe shed is provided with an arched I-shaped steel bracket on the front side of the first steel bracket.
A steel beam and a protective net are arranged between the left side face and the right side face of the arched I-steel support and the left side face and the right side face of the first steel support, and a steel beam and a protective net are arranged between the top of the arched I-steel support and the arched steel shed beam of the first steel support.
The utility model has the advantages that: the utility model discloses the efficiency of construction is high, and the security is good, can improve the physical mechanics nature of weak broken rock stratum, and the rigidity of strutting the system simultaneously is great, can bear early country rock pressure in advance, and effective control country rock is out of shape, and it is not hard up and the slump to restrain the country rock, maintains the stability in tunnel, and uninstallation country rock deformation stress plays better supporting effect to broken soft rock tunnel.
Drawings
Fig. 1 is a schematic structural diagram of the combined supporting device of the pipe shed and the steel bracket of the utility model.
In the figure: 1-a first steel support; 2-a second steel bracket; 3-arched steel shed beams; 4-left steel shed struts; 5-footing; 6-connecting the steel beam on the side; 7-side protective net; 8-pipe shed; 9-obliquely inserting a steel pipe; 10-top protective net; 11-right steel shed support.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in figure 1, the pipe shed and steel support combined supporting device for the rapid excavation of the tunnel for the crushed soft rock comprises a first steel support 1, a second steel support 2 and a pipe shed 8, wherein each of the first steel support 1 and the second steel support 2 comprises an arched steel shed beam 3, a left steel shed pillar 4 and a right steel shed pillar 4 which are fixedly arranged at the lower end of the arched steel shed beam 3, a side connecting steel beam 6 and a side protective net 7 are connected between the left steel shed pillar 4 of the first steel support 1 and the left steel shed pillar 4 of the second steel support 2, a side connecting steel beam 6 and a side protective net 7 are connected between the right steel shed pillar 4 of the first steel support 1 and the right steel shed pillar 4 of the second steel support 2, the pipe shed 8 is formed by a plurality of obliquely inserted steel pipes 9 of which front half sections are obliquely inserted into a rock body on the top surface of the tunnel, the middle sections of the obliquely inserted steel pipes 9 are pressed on the upper end surface of the arched steel shed beam 3 of the first steel support 1, the rear end of the oblique steel pipe 9 is inserted and the bottom surface of the arched steel shed beam 3 of the second steel support 2 is selected, the oblique steel pipe 9 is welded with the upper end surface of the arched steel shed beam 3 of the first steel support 1 and the bottom surface of the arched steel shed beam 3 of the second steel support 2, and a top protective net 10 is fixedly arranged below the pipe shed 8 between the arched steel shed beam 3 of the first steel support 1 and the arched steel shed beam 3 of the second steel support 2.
The inclined insertion steel pipe 9 is driven into along the rock surface at a smaller elevation angle, the front section of the inclined insertion steel pipe is embedded into surrounding rocks, the first steel support 1, the second steel support 2 and the pipe shed 8 jointly form a beam structure to bear the pressure of the surrounding rocks, the surrounding rocks can be effectively prevented from loosening and collapsing, the physical and mechanical properties of a weak broken rock stratum can be improved, meanwhile, the rigidity of a supporting system is large, the deformation of the surrounding rocks is effectively controlled, the stability of a roadway is maintained, the deformation stress of the surrounding rocks is unloaded, and a better supporting effect is achieved on the broken soft rock roadway. The utility model discloses the efficiency of construction is high, and the security is good.
The lower end of the left steel shed pillar 4 and the lower end of the right steel shed pillar 4 are both provided with a supporting plate-shaped footing 5.
An arched I-shaped steel bracket is arranged at the lower end of the pipe shed 8 and in front of the first steel bracket 1. And steel beams and protective nets are arranged between the left side surface and the right side surface of the arched I-steel bracket and the left side surface and the right side surface of the first steel bracket 1, and the steel beams and the protective nets are arranged between the top of the arched I-steel bracket and the arched steel shed beam 3 of the first steel bracket 1. The arched I-steel bracket is an arched bracket body with the same shape as the first steel bracket 1 and mainly plays a role in supporting the pipe shed 8.
Referring to fig. 1, the combined supporting device of the pipe shed and the steel bracket comprises the following steps:
1) after the tunnel is excavated and blasted, calibrating a plurality of hole sites of the obliquely inserted steel pipes 9 on the top surface of the tunnel outside the outline line of the excavated tunnel, and drilling holes on the calibrated hole sites to clear the holes after the designed depth is reached;
2) a plurality of obliquely inserted steel pipes 9 are sequentially driven into the holes to serve as pipe sheds 8, foaming glue is injected between the obliquely inserted steel pipes 9 and the top surface of the roadway, temporary steel supports are erected below the obliquely inserted steel pipes 9 to support the obliquely inserted steel pipes 9, and the obliquely inserted steel pipes 9 and the temporary steel supports are used as pre-support structures during engineering excavation;
3) manufacturing a first steel support 1 and a second steel support 2 on the rear side of the temporary steel support while excavating, wherein the distance between the first steel support 1 and the second steel support 2 is 800-1200 mm, the middle section of an obliquely inserted steel pipe 9 is pressed on the upper end surface of an arched steel shed beam 3 of the first steel support 1, the rear end of the obliquely inserted steel pipe 9 is placed on the bottom surface of the arched steel shed beam 3 of the second steel support 2, and the obliquely inserted steel pipe 9 is welded with the upper end surface of the arched steel shed beam 3 of the first steel support 1 and the bottom surface of the arched steel shed beam 3 of the second steel support 2;
4) a side connecting steel beam 6 and a side protective net 7 are arranged between a left steel shed pillar 4 of the first steel bracket 1 and a left steel shed pillar 4 of the second steel bracket 2, a side connecting steel beam 6 and a side protective net 7 are arranged between a right steel shed pillar 4 of the first steel bracket 1 and a right steel shed pillar 4 of the second steel bracket 2, and a top protective net 10 is fixedly arranged below a pipe shed 8 between an arched steel shed beam 3 of the first steel bracket 1 and an arched steel shed beam 3 of the second steel bracket 2;
5) replacing temporary steel brackets with arched I-steel brackets, arranging steel beams and protective nets between the left and right side surfaces of the arched I-steel brackets and the left and right side surfaces of the first steel brackets 1, arranging the steel beams and the protective nets between the tops of the arched I-steel brackets and the arched steel shed beams 3 of the first steel brackets 1, and forming a combined supporting system structure by the arched I-steel brackets, the first steel brackets 1, the second steel brackets 2 and the pipe sheds 8;
6) and grouting cement mortar between the left and right side surfaces and the top surface of the combined supporting system structure and the wall surface of the roadway.
Through predetermineeing 8 means of pipe shed, consolidate the stratum, improve its bearing capacity, change the closely knit degree and the porosity of rock mass, the shelly supporting construction who has better intensity and rigidity simultaneously has better the wholeness of maintaining the rock mass structure, furthest's performance country rock's self-supporting ability, the deformation of effectual control country rock plays better supporting effect. The advanced pre-support is adopted for roadway excavation and excavation, so that disturbance to surrounding rock can be effectively reduced, underground water can be controlled as early as possible, hole collapse after hole drilling is prevented, the construction speed is high, the safety is high, the construction period is short, the support effect is good, and a solid foundation is laid for subsequent roadway excavation.
When the tunnel is tunneled through a fault, the rock mass at the upper part applies huge load to the tunnel, and part of the load is removed through the deformation of the pipe shed 8 and the steel support, so that the load transmitted to the supporting structure at the upper part of the tunnel is reduced, and the aims of advanced roof control and temporary support can be achieved even if grouting is not performed. Meanwhile, the arched I-shaped steel support, the first steel support 1 and the second steel support 2 are arranged in the length direction of the obliquely inserted steel pipe 9, so that the supporting structure forms a whole, and the safety of later-stage tunneling construction can be effectively guaranteed.
It should be finally noted that the above only serves to illustrate the technical solution of the present invention, and not to limit the scope of the present invention, and that simple modifications or equivalent replacements performed by those skilled in the art to the technical solution of the present invention do not depart from the spirit and scope of the technical solution of the present invention.
Claims (4)
1. The utility model provides a pipe shed and steel support combined support device which characterized in that: the combined supporting device of the pipe shed and the steel support comprises a first steel support, a second steel support and a pipe shed, wherein the first steel support and the second steel support respectively comprise an arched steel shed beam, a left steel shed pillar and a right steel shed pillar which are fixedly arranged at the lower end of the arched steel shed beam, a side connecting steel beam and a side protective net are connected between the left steel shed pillar of the first steel support and the left steel shed pillar of the second steel support, a side connecting steel beam and a side protective net are connected between the right steel shed pillar of the first steel support and the right steel shed pillar of the second steel support, the pipe shed is composed of a plurality of obliquely inserted steel pipes of which the front half sections are obliquely inserted into a rock body of a top surface of a roadway, the middle sections of the obliquely inserted steel pipes are pressed on the upper end surface of the arched steel shed beam of the first steel support, and the rear ends of the obliquely inserted steel pipes are arranged on the bottom surface of the arched steel shed beam of the second steel support, the oblique inserting steel pipes are welded with the upper end face of the arched steel shed beam of the first steel support and the bottom face of the arched steel shed beam of the second steel support, and a top protective net is fixedly arranged between the arched steel shed beam of the first steel support and the arched steel shed beam of the second steel support below the pipe shed.
2. The combined supporting device of the pipe shed and the steel bracket according to claim 1, characterized in that: and the lower end of the left steel shed pillar and the lower end of the right steel shed pillar are provided with supporting plate-shaped bottom feet.
3. The combined supporting device of the pipe shed and the steel bracket according to claim 2, characterized in that: and the lower end of the pipe shed is provided with an arched I-shaped steel bracket on the front side of the first steel bracket.
4. The combined supporting device of the pipe shed and the steel bracket according to claim 3, characterized in that: a steel beam and a protective net are arranged between the left side face and the right side face of the arched I-steel support and the left side face and the right side face of the first steel support, and a steel beam and a protective net are arranged between the top of the arched I-steel support and the arched steel shed beam of the first steel support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921753963.3U CN210622819U (en) | 2019-10-18 | 2019-10-18 | Pipe shed and steel support combined supporting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921753963.3U CN210622819U (en) | 2019-10-18 | 2019-10-18 | Pipe shed and steel support combined supporting device |
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| CN210622819U true CN210622819U (en) | 2020-05-26 |
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| CN201921753963.3U Active CN210622819U (en) | 2019-10-18 | 2019-10-18 | Pipe shed and steel support combined supporting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566236A (en) * | 2019-10-18 | 2019-12-13 | 赤峰柴胡栏子黄金矿业有限公司 | Pipe shed and steel support combined supporting device and supporting method |
| CN115306447A (en) * | 2022-08-10 | 2022-11-08 | 中国有色金属工业昆明勘察设计研究院有限公司 | Broken rock supporting device in tunnel |
-
2019
- 2019-10-18 CN CN201921753963.3U patent/CN210622819U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566236A (en) * | 2019-10-18 | 2019-12-13 | 赤峰柴胡栏子黄金矿业有限公司 | Pipe shed and steel support combined supporting device and supporting method |
| CN110566236B (en) * | 2019-10-18 | 2024-03-08 | 赤峰柴胡栏子黄金矿业有限公司 | Combined supporting device and supporting method for pipe shed and steel support |
| CN115306447A (en) * | 2022-08-10 | 2022-11-08 | 中国有色金属工业昆明勘察设计研究院有限公司 | Broken rock supporting device in tunnel |
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