CN112523787A - Mobile shield tunnel temporary reinforcing platform - Google Patents
Mobile shield tunnel temporary reinforcing platform Download PDFInfo
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- CN112523787A CN112523787A CN202011218038.8A CN202011218038A CN112523787A CN 112523787 A CN112523787 A CN 112523787A CN 202011218038 A CN202011218038 A CN 202011218038A CN 112523787 A CN112523787 A CN 112523787A
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 33
- 230000002787 reinforcement Effects 0.000 claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000008859 change Effects 0.000 abstract description 3
- 230000008439 repair process Effects 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
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- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
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- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000004044 response Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D19/00—Provisional protective covers for working space
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Abstract
The invention discloses a movable shield tunnel temporary reinforcing platform which comprises an air bag, an umbrella-shaped support and a trolley, wherein the top of the air bag is used for pushing a tunnel structure, the umbrella-shaped support is used for supporting the air bag below the air bag, the trolley is connected to the bottom of the umbrella-shaped support and can move on a track, and the trolley can be switched between a driving state and a parking state. The invention can be quickly positioned along the track to the tunnel in the elliptical deformation area to be repaired, quickly pressurizes and pushes the tunnel structure for the air bag, can avoid the personnel from being exposed in the risk tunnel without protective measures for a long time to operate while recovering the deformation of the tunnel structure, reserves sufficient operating space for the permanent reinforcement of the two sides of the tunnel and provides a new idea for the emergency repair of the shield tunnel. In addition, when the tunnel is influenced by external operation, the platform can also reinforce the tunnel in the influenced area in advance, and can flexibly adjust the reinforcing position to adapt to the change of the external operation and reduce the influence of the external operation on the safety of the tunnel structure.
Description
Technical Field
The invention relates to the field of urban tunnel construction, in particular to a movable shield tunnel temporary reinforcing platform.
Background
With the great improvement of the urban underground space utilization rate, the service life of the shield tunnel is gradually prolonged, and therefore more and more attention is paid to the shield tunnel deformation diseases. The accidents that serious diseases of the shield tunnel are caused by overlarge transverse deformation are frequently caused by the influences of foundation pit construction, shield tunneling, ground overload and the like. The shield tunnel diseases induced by excessive transverse deformation are mainly shown as follows: the structure invades the tunnel limit, which affects the train operation safety; the water leakage at the joint part is caused by overlarge longitudinal seam opening amount of the duct piece; the phenomenon of concrete block falling occurs at the longitudinal joint of the shield tunnel segment, so that the train running safety is influenced, and the life safety of inspection personnel is endangered; the transverse deformation is too large, so that the transverse stress safety of the structure is endangered, and further, a major accident of the collapse of the shield tunnel is induced. At present, reinforcing measures such as steel plate pasting reinforcement and grouting reinforcement which are adopted aiming at overlarge transverse deformation mostly need personnel to enter a tunnel for construction operation. However, there is a great potential safety hazard when the personnel do not carry out the construction operation under the reinforcement protection measure, and the reinforcement under the condition easily causes disturbance to the tunnel, aggravates the lateral deformation.
At present, aiming at the shield tunnel with overlarge transverse deformation, a rounding device integrated with a shield machine is generally adopted to carry out rounding treatment on shield tunnel segments, but the shield machine is large in size and difficult to operate, and the method is only suitable for the initial stage of shield construction and cannot be applied to subway tunnels in operation. In addition, as the device measures for reinforcing the shield tunnel disclosed in the shield tunnel repair reinforcing platform and the reinforcing method with the application number of 201910353616.X and the device measures for reinforcing the shield tunnel disclosed in the stacked shield modular steel support reinforcing structure with the application number of 201920002072.8, the former adopts a method of combining a support frame structure with a jack to provide support reinforcing measures for a tunnel structure, and the latter uses an integral steel frame structure for supporting. Because the degree of ellipse variation of the tunnel under the reinforcing effect constantly changes, the above two methods adopting the rigid support can not be attached to the tunnel structure with the dynamically-changed curvature, the jacking force can not be uniformly applied to the top of the tunnel, the condition of local stress of the tunnel structure is easy to occur, and secondary damage is caused to the tunnel structure. In addition, traditional steelframe supports and needs the manual work to get into the tunnel and install, and the operation is comparatively troublesome.
A method for supporting the shield tunnel structure by using the air bag is also provided in the following, such as a method for preventing continuous collapse of the shield tunnel and failure of the tunnel lining structure, which is applied under the application number 201710823373.2, and a temporary duct piece supporting device for emergency rescue of shield tunnel accidents, which is applied under the application number 201710223548.6. Although the method solves the problem of local stress, the air bag integrally attached to the inside of the tunnel cannot provide required operation space for constructors, and certain risk of air bag rupture exists. The method is only suitable for emergency rescue, subsequent permanent reinforcement measures cannot be carried out after the air bag is reinforced, and the application range is small.
Disclosure of Invention
The invention aims to provide a mobile shield tunnel temporary reinforcing platform aiming at the defects of the prior art.
The above object of the present invention is achieved by the following technical solutions:
a movable shield tunnel temporary reinforcing platform comprises an air bag, an umbrella-shaped support and a trolley; the trolley can run on the shield tunnel track, the bottom end of the umbrella-shaped support is fixed on a support base at the top of the trolley, the top of the umbrella-shaped support comprises an arc-shaped plate, and the air bag is fixed on the arc-shaped plate; the trolley can be switched between a driving state and a parking state, and the air bag is provided with an air nozzle air bag which can provide normal pressure for the top of the tunnel structure after being inflated, pressurized and expanded. Through even top of gasbag, can improve the laminating nature with shield tunnel structure greatly for gasbag pressure evenly acts on tunnel structure, is difficult for appearing local atress. In addition, the maneuvering performance of the trolley can lead the device to flexibly and flexibly adjust the reinforcing area of the tunnel according to the change of the influence range of external operation, and the construction efficiency and the safety can be effectively improved. Through this structure of umbrella-type support, can reserve sufficient operation space for the constructor, be convenient for further consolidate the operation.
Further, the gasbag includes that the gasbag inflation face at top, bottom are fixed in the gasbag stationary plane on the arc, the gasbag inflation face is equipped with pressure sensor, be equipped with the control cabinet in the platform truck, the control cabinet can acquire pressure sensor's pressure value to adjust aerating device with this and control gasbag pressure, improved the maneuverability and the flexibility that gasbag pressure adjusted.
Further, the air bag is composed of latticed air bag units, and each air bag unit is provided with an air nozzle and a pressure sensor. The separated air bag is beneficial to improving the overall safety of the air bag and avoiding the construction risk caused by the rupture of the air bag.
Further, in order to improve the rigidity and the bearing capacity of the umbrella-shaped support structure, the umbrella-shaped support mainly comprises a support structure formed by splicing the arc-shaped plates and the prefabricated section steel parts; the supporting structure mainly comprises a central pillar, inclined struts symmetrically distributed on two sides of the central pillar and cross beams symmetrically distributed on two sides of the central pillar, and two adjacent trusses are connected through a longitudinal connecting beam for connecting the central pillars between the trusses; one end of the middle column is fixed on the bracket base, and the other end of the middle column is fixedly connected with the arc-shaped plate; one end of the inclined strut is fixed on the bracket base, and the other end of the inclined strut is fixedly connected to the arc-shaped plate; one end of the cross beam is fixed to the center pillar, the other end of the cross beam is fixed to the inclined strut, and two ends of the longitudinal connecting beam are respectively fixed to the center pillars of two adjacent trusses.
Furthermore, bolts are adopted for connecting all parts of the umbrella-shaped support, and bolts are also adopted for connecting the umbrella-shaped support and the support base. The detachable design greatly improves the convenience and flexibility of construction.
Further, the gasbag is equipped with the first face of magic subsides, the arc is equipped with corresponding second face of magic subsides. The first surface of the magic tape and the second surface of the magic tape are respectively one of a hook surface and a hair surface. Adopt the magic subsides to carry out fixed connection between gasbag and the arc, make full use of magic subsides have this characteristics of great frictional force, do benefit to the installation dismantlement and the reuse of gasbag simultaneously.
Further, the trolley also comprises an air bag inflating device, and the air bag inflating device is used for inflating the air bag.
Further, in order to improve the rigidity of the trolley structure, the trolley further comprises a supporting frame, and the supporting frame is fixed below the support base. Can be used for avoiding overlarge supporting counter force from acting on the trolley, thereby leading the trolley to obviously deform.
Furthermore, in order to realize the conversion between the driving state and the parking state of the trolley, the trolley further comprises a supporting foot arranged at the bottom, and the driving state and the parking state are switched by adjusting the lifting of the supporting foot through the control console. The spike falls to prop to the railway roadbed and makes the wheel break away from the track when driving the vehicle state, can effectively fix the platform truck like this and avoid it to appear removing under the parking state, also avoids the track atress to warp simultaneously, influences the operation safety.
Compared with the prior art, the invention has the following advantages:
(1) the temporary reinforcing platform adopts the flexible air bags to support and reinforce the shield tunnel, and compared with the traditional rigid support, the temporary reinforcing platform greatly improves the fitting property with the shield tunnel structure, so that the air bag pressure uniformly acts on the tunnel structure, and local stress is not easy to occur.
(2) The mobility of the trolley can lead the device to flexibly adjust the reinforced area of the tunnel according to the change of the influence range of external operation. When the tunnel has the reinforcement demand, this device accessible track is taken one's place fast, accomplishes the reinforcement and in time leaves the field in the short time. The device can realize standardized operation by fast positioning and fast supporting, and particularly, when a plurality of areas of the tunnel have reinforcement requirements, the mobility and the standardization can effectively improve the construction efficiency and the safety.
(3) The umbrella-shaped structure adopted by the temporary reinforcing platform reserves sufficient reinforcing operation space at two sides, and is beneficial to construction personnel entering the tunnel to further carry out construction operation of permanent reinforcing measures after the temporary supporting and reinforcing of the air bags.
(4) The pressure sensor at the top of the air bag is beneficial to real-time measurement and safety early warning of the jacking force of the air bag, and signals are transmitted to the console, so that the pressure of the air bag can be flexibly adjusted.
(5) The air bag is internally provided with an air bag middle partition layer which divides the air bag into a grid shape integrally, and the grid shape also comprises a plurality of strip areas which are divided along the longitudinal direction or the transverse direction. The separated air bag is beneficial to increasing the overall safety of the air bag, and the construction risk caused by accidental rupture of the air bag is greatly reduced.
(6) The supporting feet are arranged at the bottom of the trolley, so that the local pressure of wheels on the track during air bag supporting and reinforcing can be reduced, the track is prevented from deforming and laterally moving due to excessive pressure, the positioning effect can be realized during supporting and reinforcing, and the trolley is prevented from moving through the friction force between the supporting feet and the track bed.
(7) The support base and the support frame of the trolley fully consider the force transmission characteristic of the umbrella-shaped support and are used for improving the integral deformation resistance of the trolley.
(8) The umbrella-shaped support is of a splicing structure, can be quickly spliced and installed on the trolley before entering the tunnel, and reduces the construction risk of constructors. The disassembly is also convenient in the standby state to save the storage space.
(9) The air bag and the arc-shaped plate are fixedly connected by the magic tape, the characteristic that the magic tape has larger friction force is fully utilized, and the air bag is favorable for mounting, dismounting and recycling.
Drawings
The invention is described in further detail below with reference to the figures and the detailed description.
FIG. 1 is an overall three-dimensional schematic view of a shield tunnel in a parking state of a temporary reinforcing platform;
fig. 2 is a front view of the shield tunnel in a state where the temporary reinforcing platform is stopped;
FIG. 3 is a three-dimensional schematic diagram of the overall structure of a temporary reinforcing platform according to an embodiment of the invention;
FIG. 4 is a schematic illustration of the assembly of the components of the temporary reinforced platform according to an embodiment of the present invention;
FIG. 5 is an overall three-dimensional schematic view of an air bag in an embodiment of the invention;
FIG. 6 is an internal deployment view of an airbag in an embodiment of the invention;
FIG. 7 is a schematic view showing the flow direction of the air inside the air bag in the embodiment of the present invention;
FIG. 8 is a three-dimensional schematic diagram of the overall structure of an umbrella-shaped stent in an embodiment of the present invention;
FIG. 9 is a schematic diagram showing the assembly of the components of the umbrella stent in an embodiment of the present invention;
FIG. 10 is a schematic illustration of the components of the trolley in an embodiment of the invention;
FIG. 11 is a front view of the cart in the embodiment of the present invention in a driving state;
fig. 12 is a front view of the bogie in the parking state in the embodiment of the invention;
in the figure: 1-tunnel structure; 2-ballast bed; 3-track; 4, air bags; 5-umbrella-shaped support; 6, a trolley; 11-reserving an operation space; 41-balloon inflation surface; 42-airbag fixing surface; 43-airbag middle barrier; 44-air tap; 45, sticking the first surface of the magic tape; 46-gas flow direction schematic; 47-a pressure sensor; 51-an arc-shaped plate; 52-center pillar; 53-diagonal bracing; 54-a cross beam; 55-longitudinal coupling beam; 56-magic tape second surface; 57-reserved air pipe holes; 61-a bracket base; 62-a console; 63-an airbag inflation device; 64-a support frame; 65-a wheel; 66-arm brace.
Detailed Description
As shown in fig. 1-2, the structure is a tunnel structure 1 in which a mobile temporary reinforcing platform enters a tunnel and enters a parking state, a trolley 6 of the temporary reinforcing platform is positioned on a track 3 of a shield tunnel, an umbrella-shaped support 5 is fixed on the trolley 6, and a top arc plate 51 provides pushing counter force for an air bag 4. The air bag 4 plays a supporting role for the top of the tunnel structure 1 after being inflated. Along with the increase of the jacking force of the air bag 4, the ovality of the tunnel structure 1 is gradually reduced, and the transverse deformation is recovered to a certain extent. After the air bag 4 is stably supported, constructors enter the reserved operation space 11 to carry out construction of permanent reinforcement measures.
Before the temporary reinforcing platform enters the tunnel, the assembling of the umbrella-shaped support 5 and the fixing of the air bag 4 are completed. As shown in fig. 5, a plurality of first surfaces 45 of hook and loop fasteners for connecting arc-shaped plates are welded on two sides of the airbag fixing surface 42 of the airbag 4, and an air nozzle 44 is arranged in the middle of the airbag fixing surface corresponding to each airbag partition. And a plurality of pressure sensors are uniformly arranged on the air bag expansion surface 41 and are used for measuring the jacking force of the air bag 4 on the tunnel structure 1 in real time.
As shown in fig. 3-4 and 8-9, a reserved air pipe hole 57 is formed in the special arc-shaped plate 51 at a position corresponding to the air nozzle 44, and is used for connecting the air pipe of the air bag 4 and the air bag inflating device 63, a plurality of second magic tape surfaces 56 are welded to two sides of the arc-shaped plate 51, and the positions of the second magic tape surfaces 56 correspond to the first magic tape surfaces of the air bag fixing surface 42. When the air bag 4 is fixedly connected with the arc-shaped plate 51, the air nozzles 44 are firstly embedded into the reserved air pipe holes 57 at the corresponding positions one by one to play a role of preliminary positioning. Meanwhile, the first surface 45 of the hook and loop fastener is adhered to the second surface 56 of the hook and loop fastener, thereby further enhancing the connection between the air bag 4 and the arc-shaped plate 51.
After the arc-shaped plates 51 and the air bags 4 are fixedly connected, the umbrella-shaped support 5 is assembled. As shown in fig. 8 to 9, the position of each umbrella-shaped support 5 is marked on the support base 61, the center pillar 52 and the diagonal brace 53 of each frame are fixed to the support base 61 at predetermined positions by bolts, and the overall strength of each frame and the adjacent frames is increased by the cross beam 54 and the longitudinal connecting beam 55. Finally, the arc-shaped plate 51 to which the airbag 4 has been fixed is connected to the top ends of the center pillar 52 and the diagonal brace 53 by bolts.
As shown in fig. 10 to 12, a support frame 64 for providing a reaction force to the umbrella-shaped support 5 is mounted on the bogie 6. In order to improve the overall stability of the frame, a support base 61 is further arranged between the support frame 64 and the umbrella-shaped support 5. In the gaps of the supporting frame 64, a plurality of airbag inflators 63 are provided, which are connected to the air nozzles 44 of the airbags 4 through air tubes. The front part of the trolley is provided with a control console 62 for controlling the work coordination of the whole temporary reinforcing platform. The bottom of the trolley is provided with a supporting foot 66 which is folded in a driving state and supported on the track bed 2 in a parking state, and the wheels 65 are separated from the track 3.
After the air bag 4, the umbrella-shaped support 5 and the trolley 6 are assembled outside the tunnel, the tunnel enters the tunnel and is quickly located at the designated reinforcing position. After the trolley 6 is in place, the trolley is switched to a parking state, the supporting feet 66 are firstly adjusted through the control console 62 to be put down and supported on the track bed 2 until the wheels 65 are separated from the track 3, and then the air bags 4 are started to be inflated through adjusting the air bag inflation device 63. As shown in fig. 7, the air flow enters the air bag through the air cap 44. When the state of the air bag 4 is stable and the air bag expansion surface 41 contacts the top of the tunnel structure 1, the pressure sensor 47 feeds the pressure value back to the control console 62, and the control console 62 controls the working power of the air bag inflating device 63 in real time through the pressure value parameters, so that the jacking force of the air bag 4 on the top of the tunnel structure 1 is adjusted. When the ovality of the tunnel structure 1 is reduced and the state of the air bag 4 is stable, constructors quickly enter the tunnel and reach the reserved operation space to perform construction of other permanent reinforcement measures, for example, measures such as grouting reinforcement on two sides of the tunnel structure 1 are performed.
The embodiment of the present invention is not limited thereto, and according to the above-mentioned contents of the present invention, the movable shield tunnel temporary strengthening platform of the present invention has other forms of air bag shapes and support structures according to the ordinary techniques and conventional means in the art without departing from the basic technical idea of the present invention; the structural sizes of the air bag and the umbrella-shaped support can be designed and processed according to the actual engineering condition; the connection among all the parts and the connection between the air bag and the bracket can adopt other modes; the support base, the umbrella-shaped support and other structures can be made of steel and other materials with better strength according to actual conditions. Other schemes can be adopted for linkage response between the console and the air bag. Therefore, the present invention is susceptible to various modifications, substitutions and changes, and falls within the scope of the appended claims.
Claims (9)
1. A movable shield tunnel temporary reinforcing platform is characterized by comprising an air bag (4), an umbrella-shaped support (5) and a trolley (6); the trolley (6) can run on the shield tunnel track (3), the bottom end of the umbrella-shaped support (5) is fixed on a support base (61) at the top of the trolley (6), the top of the umbrella-shaped support (5) comprises an arc-shaped plate (51), and the air bag (4) is fixed on the arc-shaped plate (51); the trolley (6) can be switched between a driving state and a parking state, and the air bag (4) is provided with an air nozzle (44).
2. The mobile shield tunnel temporary reinforcement platform of claim 1, wherein: gasbag (4) are fixed in gasbag stationary plane (42) on arc (51) including gasbag inflation face (41), the bottom at top, gasbag inflation face (41) are equipped with pressure sensor (47), be equipped with control cabinet (62) in platform truck (6), pressure value that pressure sensor (47) can be acquireed in control cabinet (62).
3. The mobile shield tunnel temporary reinforcement platform of claim 2, wherein: the air bag (4) is composed of latticed air bag units, and each air bag unit is provided with an air nozzle (44) and a pressure sensor (47).
4. The mobile shield tunnel temporary reinforcement platform of any one of claims 1 to 3, wherein: the umbrella-shaped support (5) mainly comprises a supporting structure formed by splicing the arc-shaped plate (51) and the prefabricated steel part; the supporting structure mainly comprises a central pillar (52), inclined struts (53) symmetrically distributed on two sides of the central pillar (52) and cross beams (54) symmetrically distributed on two sides of the central pillar (52) to form one truss of the supporting structure, and two adjacent trusses are connected through longitudinal connecting beams (55) for connecting the central pillars (52) between the trusses; one end of the middle column (52) is fixed on the bracket base (61), and the other end is fixedly connected with the arc-shaped plate (51); one end of the inclined strut (53) is fixed on the bracket base (61), and the other end is fixedly connected with the arc-shaped plate (51); one end of the cross beam (53) is fixed to the central column (52), the other end of the cross beam is fixed to the inclined support (53), and two ends of the longitudinal connecting beam (55) are respectively fixed to the central columns (52) of two adjacent trusses.
5. The mobile shield tunnel temporary reinforcement platform of claim 4, wherein: bolts are adopted for connecting all parts of the umbrella-shaped support (5), and bolts are also adopted for connecting the umbrella-shaped support (5) and the support base (61).
6. The mobile shield tunnel temporary reinforcement platform of claim 4, wherein: the air bag (4) is provided with a magic tape first surface (45), and the arc-shaped plate (51) is provided with a corresponding magic tape second surface (56).
7. The mobile shield tunnel temporary reinforcement platform of any one of claims 1 to 3, wherein: the trolley (6) further comprises an airbag inflation device (63), and the airbag inflation device (63) is used for inflating the airbag (4).
8. The mobile shield tunnel temporary reinforcement platform of claim 7, wherein: the trolley (6) further comprises a supporting frame (64), and the supporting frame (64) is fixed below the support base (61).
9. The mobile shield tunnel temporary reinforcement platform of claim 8, wherein: the trolley (6) further comprises a supporting foot (66) arranged at the bottom, and the driving state and the parking state are switched by adjusting the lifting of the supporting foot (66) through the control console (62).
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| CN202011218038.8A CN112523787A (en) | 2020-11-04 | 2020-11-04 | Mobile shield tunnel temporary reinforcing platform |
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| CN202011218038.8A CN112523787A (en) | 2020-11-04 | 2020-11-04 | Mobile shield tunnel temporary reinforcing platform |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113027503A (en) * | 2021-03-24 | 2021-06-25 | 三峡大学 | Movable device for filling non-Newtonian fluid to resist impact force and construction method |
| CN113374984A (en) * | 2021-05-28 | 2021-09-10 | 苏州市平海排水服务有限公司 | Grouting repair method for drainage pipeline |
| CN114320464A (en) * | 2021-12-08 | 2022-04-12 | 华侨大学 | Tunnel segment joint early warning device and method |
| CN116792131A (en) * | 2023-08-23 | 2023-09-22 | 吉林蛟河抽水蓄能有限公司 | Tunnel supporting device |
| CN117167057A (en) * | 2023-11-03 | 2023-12-05 | 北京城建设计发展集团股份有限公司 | Shield tunnel reinforcing unit, reinforcing device and reinforcing method |
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| CN114320464A (en) * | 2021-12-08 | 2022-04-12 | 华侨大学 | Tunnel segment joint early warning device and method |
| CN114320464B (en) * | 2021-12-08 | 2023-05-26 | 华侨大学 | Tunnel segment joint early warning device and method |
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| CN116792131B (en) * | 2023-08-23 | 2023-10-20 | 吉林蛟河抽水蓄能有限公司 | Tunnel supporting device |
| CN117167057A (en) * | 2023-11-03 | 2023-12-05 | 北京城建设计发展集团股份有限公司 | Shield tunnel reinforcing unit, reinforcing device and reinforcing method |
| CN117167057B (en) * | 2023-11-03 | 2024-02-20 | 北京城建设计发展集团股份有限公司 | Shield tunnel reinforcing unit, reinforcing device and reinforcing method |
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Application publication date: 20210319 |