CN113309539A - Tunnel supporting structure with shock attenuation and stress early warning effect - Google Patents
Tunnel supporting structure with shock attenuation and stress early warning effect Download PDFInfo
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- CN113309539A CN113309539A CN202110787154.XA CN202110787154A CN113309539A CN 113309539 A CN113309539 A CN 113309539A CN 202110787154 A CN202110787154 A CN 202110787154A CN 113309539 A CN113309539 A CN 113309539A
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- foam concrete
- layer
- concrete pouring
- spring
- pouring layer
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- 230000008093 supporting effect Effects 0.000 title claims abstract description 62
- 230000035939 shock Effects 0.000 title claims abstract description 20
- 230000000694 effects Effects 0.000 title abstract description 5
- 239000011381 foam concrete Substances 0.000 claims abstract description 58
- 239000004567 concrete Substances 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 238000003466 welding Methods 0.000 claims abstract description 4
- 230000006870 function Effects 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 12
- 238000005260 corrosion Methods 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000000741 silica gel Substances 0.000 claims description 7
- 229910002027 silica gel Inorganic materials 0.000 claims description 7
- 238000010276 construction Methods 0.000 abstract description 13
- 230000006378 damage Effects 0.000 abstract description 10
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- 239000000835 fiber Substances 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000035807 sensation Effects 0.000 description 2
- 239000011378 shotcrete Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/155—Laggings made of strips, slats, slabs or sheet piles
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
- E21F17/185—Rock-pressure control devices with or without alarm devices; Alarm devices in case of roof subsidence
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model provides a tunnel supporting construction with shock attenuation and stress early warning effect, includes interior outer foam concrete placement layer, seals the backup pad of U-shaped, foam concrete is for the novel foam concrete material of doping tip area crotch shaped steel fibre, concrete placement layer is pour inside two-layer foam concrete, the U-shaped backup pad passes through the spring and is connected with foam concrete, the inside pressure sensor that is equipped with of spring, pressure sensor with pilot lamp and power in the U-shaped backup pad link to each other, the U-shaped backup pad is for sealing mouthful shape to the bottom welding has the conical body, can effectively prevent that the backup pad from sinking and the phenomenon of side shifting. The supporting plate is connected with the foam concrete through the spring, so that the influence caused by vibration can be effectively reduced, the phenomenon of stress concentration is avoided, the damage degree of the top stress of the concrete pouring layer is prolonged, and the phenomenon of damage caused by exceeding the stress can be timely warned.
Description
Technical Field
The invention belongs to the technical field of tunnel construction, and particularly relates to a tunnel supporting structure with shock absorption and stress early warning functions.
Background
In recent years, the progress of the construction of modern cities in China is faster and faster, and the construction of underground rail transit, urban subway industry and mine roadway chambers is continuously developed. At present, the most widely applied structures of tunnel supporting are metal supports, U-shaped steel supports, anchor-shotcrete supporting, anchor-net-shotcrete supporting and the like, and in the using process, due to the fact that the strength of the supports is low, the contractibility is small, a plurality of problems are caused due to vibration and the fact that the problems cannot be found in time, the situation is frequent, and loss is caused.
Therefore, before the supporting structure is applied to actual engineering, an indoor model test is needed to measure the bearing capacity and deformation condition of the supporting structure and find weak parts of the supporting structure in time so as to adjust the supporting structure in the actual engineering.
At present, with the development of construction in China, the phenomenon that supports are damaged due to vibration exists, and serious influence cannot be found in time, so that a tunnel support structure with the functions of shock absorption and stress early warning is needed.
Disclosure of Invention
Based on the analysis and in combination with the defects in the prior art, the invention solves the problem of providing the tunnel supporting structure with the functions of shock absorption and stress early warning, which can effectively reduce the influence of shock on the tunnel, avoid the damage of the supporting structure caused by the shock, avoid the economic influence caused by the untimely discovery, prolong the service life of the supporting structure and play a role of effective early warning.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention provides a tunnel supporting structure with shock absorption and stress early warning functions.
Novel foam concrete materials with hook-shaped steel fibers at the end parts are poured in the outer layer foam concrete pouring layer and the inner layer foam concrete pouring layer;
the outer layer foam concrete pouring layer and the inner layer foam concrete pouring layer are poured inside the tunnel.
The concrete pouring layer is poured between the outer layer foam concrete pouring layer and the inner layer foam concrete pouring layer.
The sealing U-shaped supporting plate is connected with the inner-layer foam concrete pouring layer through a spring, the bottom of the sealing U-shaped supporting plate is embedded in the bottom surface of the inside of the tunnel, and a plurality of conical bodies are fixedly welded at the bottom of the sealing U-shaped supporting plate;
the upper surface of sealing the U-shaped backup pad is equipped with a plurality of first spring grooves, first spring inslot portion is placed the spring, the upper portion of spring is connected inlayer foam concrete placement layer, the lower surface on inlayer foam concrete placement layer is equipped with second spring groove, the upper portion of spring is located in the second spring inslot, just first spring groove sets up with second spring groove one-to-one.
And an anti-corrosion silica gel sleeve is arranged inside the spring.
And a pressure sensor is arranged inside the anti-corrosion silica gel sleeve.
And opening square grooves are arranged below all the first spring grooves in the sealing U-shaped supporting plate.
And an indicator light and a power supply are fixed inside the square groove of the opening.
The pressure sensor is connected with the indicator light and the power supply.
The technical scheme of the tunnel supporting structure with the shock absorption and stress early warning functions comprises the following steps:
preferably, the upper surface of the U-shaped supporting plate is provided with a plurality of first spring grooves, the springs are placed in the first spring grooves, the upper portions of the springs are connected with the inner-layer foam concrete pouring layer, the lower surface of the inner-layer foam concrete pouring layer is provided with second spring grooves, the upper portions of the springs are located in the second spring grooves, and the first spring grooves and the second spring grooves are arranged in a one-to-one correspondence mode.
Preferably, 2-5% by volume of steel fibers with hooks at the end parts are added into the outer foam concrete pouring layer, foam concrete is pumped in the metal formwork and the inner wall space of the tunnel from bottom to top through a concrete filling pump, and the mold is disassembled after the concrete reaches the designed strength.
Further, the concrete pouring layer pumps the foam concrete from bottom to top in the metal template and the lower surface space of the outer layer foam concrete pouring layer through a concrete filling pump, and the mould is disassembled after the concrete reaches the designed strength.
Furthermore, 2-5% by volume of steel fibers with hooks at the end parts are added into the inner-layer foam concrete pouring layer, foam concrete is pumped from bottom to top in the metal template and the space on the lower surface of the concrete pouring layer through a concrete filling pump, and the mold is disassembled after the concrete reaches the designed strength.
Further, seal U-shaped backup pad bottom fixed welding and have the conical body, seal U-shaped backup pad with the conical body is pre-buried in the inside bottom surface in tunnel.
By above, add the steel fibre of tip area crotch type and can increase the intensity on foam concrete pouring layer, can reach the effect of fixed tunnel supporting construction steadily simultaneously, prevent that supporting construction from taking place to remove, increase the contact surface with the tunnel bottom, prevent to sink with the side displacement.
Preferably, the U-shaped supporting plate for sealing is connected with the inner layer foam concrete pouring layer through a spring.
Furthermore, the spring is stainless steel, the lower part of the spring is welded in a first spring groove formed in the upper surface of the sealed U-shaped supporting plate, and the upper part of the spring is placed in a second spring groove formed in the lower surface of the inner foam concrete pouring layer.
Therefore, the tunnel supporting structure can be effectively protected by arranging the springs and the foam concrete layer, so that the tunnel supporting structure is prevented from being damaged by impact and vibration resistance, and the service life of the supporting structure is prolonged; and the supporting device is convenient to construct, and the construction steps are simple, so that the manufacturing cost is reduced.
Preferably, the pressure sensor is a sensor with high precision and is fully in contact with the sealing U-shaped supporting plate and the inner layer foam concrete pouring layer.
Furthermore, the indicator light is an indicator light with low power consumption and high brightness, the change of the indicator light can be better reflected, the power supply equipment with large storage capacity is selected for the power supply, and the pressure sensor, the indicator light and the power supply are connected through wires with good conductivity.
Therefore, the invention can timely warn whether the supporting structure reaches the damage limit or not by arranging the pressure sensor, the indicator light and the power supply, and can effectively prevent and reduce the serious influence caused by an emergency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a schematic view of a tunnel supporting structure with shock absorption and stress early warning functions according to the present invention;
FIG. 2 is a partial schematic view of the closed U-shaped support plate of the present invention connected to an inner foam concrete pour layer;
FIG. 3 is a schematic cross-sectional view of the U-shaped support plate of the closure of the present invention attached to the inner foam concrete pour layer.
In the figure: 1-outer foam concrete pouring layer; 2-concrete pouring layer; 3-inner layer foam concrete pouring layer; 4-sealing the U-shaped supporting plate; 5-a spring; 6-a cone; 7-a first spring groove; 8-a second spring groove; 9-anti-corrosion silica gel sleeve; 10-a pressure sensor; 11-open square groove; 12-an indicator light; 13-power supply.
Detailed Description
Other aspects, features and advantages of the present invention will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which form a part of this specification, and which illustrate, by way of example, the principles of the invention. In the referenced drawings, the same or similar components in different drawings are denoted by the same reference numerals.
Furthermore, the terms "upper portion", "space", "inner bottom surface", "upper surface", "lower surface", "provided with", "welded", "connected", etc., are to be understood broadly, such as "connected", which may be a fixed connection, a detachable 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 3, the present invention provides a tunnel supporting structure with shock absorption and stress warning functions, which can effectively prevent a supporting plate from sinking and laterally moving after being stressed in some aspects, and can effectively resist a shock sensation in other aspects, so as to avoid damage to the supporting structure due to shock, avoid deformation and damage of the supporting structure due to extrusion or strong shock sensation, and further prolong the service life of the supporting structure; and prevent that supporting construction from taking place to destroy suddenly, cause the injury to inside equipment of tunnel and personnel. The tunnel sealing structure comprises an outer layer foam concrete pouring layer 1, a concrete pouring layer 2, an inner layer foam concrete pouring layer 3 and a sealing U-shaped support plate 4, wherein the outer layer foam concrete pouring layer 1 is poured inside a tunnel, the concrete pouring layer 2 is poured between the outer layer foam concrete pouring layer 1 and the inner layer foam concrete pouring layer 3, and the sealing U-shaped support plate 4 is connected with the inner layer foam concrete pouring layer 3 through a spring 5. Seal U-shaped backup pad 4 pre-buried in the inside bottom surface in tunnel, seal the fixed welding in U-shaped backup pad 4 bottom and have a plurality of coniform bodies 6.
According to the outer-layer foam concrete pouring layer 1, 2-5% by volume of steel fibers with hooks at the end parts are added, foam concrete is pumped in a metal template and a tunnel inner wall space from bottom to top through a concrete filling pump, and a mold is disassembled after the concrete reaches the designed strength. And the concrete pouring layer 2 pumps concrete in the lower surface spaces of the metal template and the outer layer foam concrete pouring layer 1 from bottom to top through a concrete filling pump, and the mould is disassembled after the concrete reaches the designed strength. And 2-5% by volume of steel fibers with hook-shaped ends are added into the inner-layer foam concrete pouring layer 3, foam concrete is pumped from bottom to top in the metal template and the lower surface space of the concrete pouring layer 2 through a concrete filling pump, and the mold is disassembled after the concrete reaches the designed strength.
The U-shaped supporting plate 4 for sealing is a stainless steel supporting plate, and the spring 5 is a stainless steel spring. The sealing U-shaped support plate 4 and the spring 5 can be prevented from rusting, and the service life of the sealing U-shaped support plate and the spring is prolonged.
According to the invention, 2-5% by volume of steel fiber with a hook at the end is added into the outer layer foam concrete pouring layer 1 and the inner layer foam concrete pouring layer 3, so that the strength of a supporting structure can be effectively increased, and the influence caused by vibration can be effectively reduced.
The indicating lamp 12 is an indicating lamp with various color changes, when the pressure sensor 10 bears different pressures, the displayed colors are different, early warning can be effectively carried out, and the condition that equipment and personnel in a tunnel are injured due to sudden damage of a supporting structure is avoided.
The anti-corrosion silica gel sleeve 9 has high strength, corrosion resistance and good contractibility, and the problem that the pressure sensor 10 is inaccurate in acquisition due to the influence of the anti-corrosion silica gel sleeve is avoided.
The power supply 13 of the invention is a concentrated power supply with high-strength storage effect, can be repeatedly used by one-time charging, avoids manual loss caused by repeated replacement and repeated charging, or can be connected with a circuit in a tunnel for power utilization.
The working principle of the tunnel supporting structure with shock absorption and stress warning function according to the present invention is briefly described with reference to fig. 1 to 3 in conjunction with the above description of the structural features:
through setting up and sealing U-shaped backup pad 4 and conical body 6, can play the supporting role to supporting construction better, prevent that the backup pad from taking place to sink and the phenomenon appearance that the side moved. Because the influence that vibrations brought supporting construction through the reduction that sets up spring 5 can be better, prevent that strutting arrangement from taking place to warp and damaging and prevent that the backup pad from bringing direct extrusion influence to inlayer foam concrete placement layer 3, through setting up outer foam concrete placement layer 1 and inlayer foam concrete placement layer 3, can effectual support concrete placement layer 2, avoid appearing stress concentration's phenomenon, and because the influence that the characteristic of foam concrete can effectual reduction vibrations bring concrete placement layer 2, can effectually avoid the destruction that vibrations brought whole supporting construction, and the support intensity of its own is strengthened simultaneously to extension supporting construction's life, prop up fine supporting effect to whole tunnel.
According to the invention, the pressure sensor 10, the indicator light 12 and the power supply 13 are arranged, the pressure sensor 10 can be used for receiving the pressure 4 between the inner concrete pouring layer 3 and the sealed U-shaped support plate, and further the stress condition of the whole supporting device is determined, and the pressure sensor 10 is arranged in multiple directions, and information is transmitted through the indicator light 12 in the open square groove 11, so that the stress and the stability condition of the whole supporting structure can be comprehensively reflected, and the loss caused by sudden damage is effectively reduced.
While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (5)
1. The tunnel supporting structure with the shock absorption and stress early warning functions is characterized by comprising an outer-layer foam concrete pouring layer, a concrete pouring layer, an inner-layer foam concrete pouring layer and a sealing U-shaped supporting plate, wherein the foam concrete pouring layer is poured inside a tunnel, the concrete pouring layer is poured between the outer-layer foam concrete pouring layer and the inner-layer foam concrete pouring layer, and the sealing U-shaped supporting plate is connected with the inner-layer foam concrete pouring layer through a spring. Seal U-shaped backup pad pre-buried in the inside bottom surface in tunnel, seal U-shaped backup pad bottom fixed welding and have a plurality of coniform bodies.
2. A tunnel supporting structure with shock absorption and stress warning functions as claimed in claim 1, wherein a plurality of first spring grooves are formed in the upper surface of the U-shaped supporting plate, the springs are placed in the first spring grooves, the upper portions of the springs are connected with the inner foam concrete pouring layer, second spring grooves are formed in the lower surface of the inner foam concrete pouring layer, the upper portions of the springs are located in the second spring grooves, and the first spring grooves and the second spring grooves are arranged in a one-to-one correspondence manner.
3. A tunnel supporting structure with shock absorption and stress early warning functions as claimed in claim 1, wherein an anti-corrosion silica gel sleeve is arranged inside the spring, and a pressure sensor is arranged inside the anti-corrosion silica gel sleeve.
4. The tunnel supporting structure with the functions of shock absorption and stress early warning as claimed in claim 1, wherein an open square groove is arranged below all the first spring grooves in the U-shaped supporting plate, and an indicator light and a power supply are fixed inside the open square groove.
5. A tunnel supporting structure with shock-absorbing and stress-warning functions as claimed in claim 3, wherein said pressure sensor is connected with an indicator light and a power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110787154.XA CN113309539A (en) | 2021-07-13 | 2021-07-13 | Tunnel supporting structure with shock attenuation and stress early warning effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110787154.XA CN113309539A (en) | 2021-07-13 | 2021-07-13 | Tunnel supporting structure with shock attenuation and stress early warning effect |
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| Publication Number | Publication Date |
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| CN113309539A true CN113309539A (en) | 2021-08-27 |
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| CN202110787154.XA Pending CN113309539A (en) | 2021-07-13 | 2021-07-13 | Tunnel supporting structure with shock attenuation and stress early warning effect |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914901A (en) * | 2021-11-11 | 2022-01-11 | 中国铁建大桥工程局集团有限公司 | Tunnel supporting structure |
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| CN113914901B (en) * | 2021-11-11 | 2024-04-09 | 中国铁建大桥工程局集团有限公司 | Tunnel supporting structure |
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Application publication date: 20210827 |