CN109736848B - Secondary lining trolley for preventing arch from falling out and construction method for preventing arch from falling out - Google Patents
Secondary lining trolley for preventing arch from falling out and construction method for preventing arch from falling out Download PDFInfo
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- CN109736848B CN109736848B CN201910142919.7A CN201910142919A CN109736848B CN 109736848 B CN109736848 B CN 109736848B CN 201910142919 A CN201910142919 A CN 201910142919A CN 109736848 B CN109736848 B CN 109736848B
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- 238000010276 construction Methods 0.000 title claims abstract description 19
- 239000004020 conductor Substances 0.000 claims abstract description 49
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 239000011800 void material Substances 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims 1
- 239000011435 rock Substances 0.000 description 12
- 238000005266 casting Methods 0.000 description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
本发明公开了一种预防拱顶脱空的二衬台车，包括二衬台车主体和设置在二衬台车主体中部的可升降检测装置；所述可升降检测装置包括检测组件、涡轮丝杠升降机和电机；所述检测组件包括同轴设置在涡轮丝杠升降机的丝杠顶部的套管、分别独立设置在套管内壁顶部并露出于套管的第一导电体和第二导电体、正负极分别与第一导电体和第二导电体电连接的监控器；所述电机驱动涡轮丝杠升降机能使套管沿竖直方向滑动实现套管伸出或缩回二衬台车主体顶部台车模板；所述第一导电体和第二导电体互相绝缘。本发明还公布了一种预防拱顶脱空施工方法。本发明提供的一种预防拱顶脱空的二衬台车和预防拱顶脱空施工方法，能够防止拱顶脱空和拱顶注浆过多。
The present invention discloses a secondary lining trolley for preventing the vault from being emptied, comprising a secondary lining trolley body and a liftable detection device arranged in the middle of the secondary lining trolley body; the liftable detection device comprises a detection assembly, a turbine screw lift and a motor; the detection assembly comprises a sleeve coaxially arranged at the top of the screw of the turbine screw lift, a first conductor and a second conductor independently arranged at the top of the inner wall of the sleeve and exposed from the sleeve, and a monitor whose positive and negative poles are electrically connected to the first conductor and the second conductor respectively; the motor drives the turbine screw lift to slide the sleeve in a vertical direction to realize the sleeve extending or retracting the trolley template at the top of the secondary lining trolley body; the first conductor and the second conductor are insulated from each other. The present invention also discloses a construction method for preventing the vault from being emptied. The secondary lining trolley for preventing the vault from being emptied and the construction method for preventing the vault from being emptied provided by the present invention can prevent the vault from being emptied and excessive grouting of the vault.
Description
Technical Field
The invention relates to the field of tunnel construction, in particular to a secondary lining trolley for preventing vault from being emptied and a vault from being emptied construction method.
Background
At present, highway tunnel lining in China is designed into a composite lining, and in general, the secondary lining of II-level and III-level surrounding rocks bears 30% of the relaxation load of the surrounding rocks, and the secondary lining of IV-level and V-level surrounding rocks bears 50% of the relaxation load of the surrounding rocks. When the design structure is analyzed and calculated, the back backfill is compacted according to the back backfill of the composite lining, and the surrounding rock at the back of the lining can provide radial elastic resistance. Therefore, the stress form of the secondary lining structure is changed no matter the back of the arch secondary lining is hollow or the back of the side wall secondary lining is hollow, so that the local stress of the secondary lining is increased, the engineering is greatly hidden danger, and the hidden danger of the hollow back of the arch secondary lining is larger. When the secondary lining vault is empty, the vault is positive bending moment, namely the upper edge of the vault is pulled, the upper edge of the arch part is not matched with stressed reinforcing steel bars according to the conventional reinforcement, so that the upper edge of the arch part is pulled to crack, water leakage and reinforcing steel bars are caused, and the secondary village concrete is damaged. On the other hand, if the secondary lining vault is hollow in pouring, surrounding rocks lose due protection and support at the beginning, and the surrounding rocks are possibly further loosened and deformed to be increased, so that the surrounding rocks are unstable and damaged, and even the serious surrounding rocks can cause tunnel block falling and local collapse. In summary, the secondary lining top void phenomenon must be prevented. The void in the casting of the secondary liner dome is generally caused by the way of casting concrete from bottom to top, and the secondary liner is cast in a ring-by-ring manner, so that the dome is completely unknown whether the dome is completely filled with concrete or not when the dome is cast.
Therefore, in order to solve the above problems, there is a need for a secondary lining trolley for preventing vault from being emptied and a construction method for preventing vault from being emptied, in which a monitor can send a warning by means of a concrete forming passage when vault casting concrete reaches a designated position, calculate the grouting time required after the concrete reaches the designated position by means of grouting speed and vault curve, set corresponding parameters to enable the monitor to give a prompt to stop vault grouting at the corresponding time, and prevent vault from being emptied and vault grouting from being excessive.
Disclosure of Invention
In view of the above, the present invention aims to overcome the defects in the prior art, and provides a secondary lining trolley for preventing vault from emptying and a construction method for preventing vault from emptying, wherein a monitor can send a warning by means of a concrete forming passage when vault casting concrete reaches a designated position, the grouting time required after the concrete reaches the designated position is calculated by the grouting speed and a vault curve, and corresponding parameters are set to enable the monitor to give a prompt to stop vault grouting at corresponding time, so that vault emptying and vault grouting overmuch are prevented.
The invention provides a secondary lining trolley for preventing vault from being emptied, which comprises a secondary lining trolley main body and a liftable detection device arranged in the middle of the secondary lining trolley main body; the liftable detection device comprises a detection assembly, a turbine screw lifter and a motor; the detection assembly comprises a sleeve coaxially arranged at the top of a screw of the turbine screw elevator, a first conductor and a second conductor which are respectively and independently arranged at the top of the inner wall of the sleeve and are exposed out of the sleeve, and a monitor, wherein the positive electrode and the negative electrode of the monitor are respectively and electrically connected with the first conductor and the second conductor; the motor drives the turbine screw rod lifter to enable the sleeve to slide along the vertical direction so as to enable the sleeve to extend or retract into the trolley template at the top of the trolley main body of the second lining trolley; the first and second conductors are insulated from each other.
Further, the monitor comprises a buzzer, a warning red light and a warning green light which are respectively connected with the power supply on the two-lining trolley in series, and the warning red light is also connected with a controller in series.
Further, the monitor is arranged in a protection box body, and the protection box body is fixed at a position 1.2-1.5m away from the ground on the two-lining trolley through a box body bracket.
Further, the first electrical conductor and the second electrical conductor are symmetrical along the sleeve axis.
Further, rubber sleeves are sleeved outside the first electric conductor and the second electric conductor, and the rubber sleeves are clamped in holes in the inner wall of the sleeve.
Further, the top grouting holes of the two lining trolley main bodies are arranged on two sides of the bottom of the top trolley template, and the height difference between the top grouting holes and the highest point of the top trolley template is 0.5-1.0m.
The beneficial effects of the invention are as follows: according to the secondary lining trolley for preventing vault from being emptied, the monitor is used for sending out a warning by means of a concrete forming passage when vault pouring concrete reaches a designated position, the grouting time required after the concrete reaches the designated position is calculated through the grouting speed and the vault curve, corresponding parameters are set to enable the monitor to give out a prompt to stop vault grouting at the corresponding time, vault emptying and excessive vault grouting are prevented, and the liftable detection device can be recycled and does not influence vault quality.
The invention also provides a construction method for preventing the vault from being emptied, which comprises the following steps:
step one: preparing construction;
step two: the second lining trolley is installed in a whole;
Step three: grouting and filling the arches on the two sides of the tunnel, and simultaneously starting a motor to drive a turbine screw rod lifter to lift the sleeve to a specified position;
Step four: grouting and filling the arch top; when the vault concrete is poured, if a buzzer of the monitor sounds and a warning green light is on, the concrete reaches a designated position;
step five: the starting motor drives the turbine screw rod lifter to retract the sleeve into the trolley template at the top of the secondary lining trolley main body;
Step six: the warning red light is turned on, and concrete arch grouting is stopped;
Step seven: demolding and moving the trolley.
The beneficial effects of the invention are as follows: according to the construction method for preventing the vault from being emptied, when the vault is grouted, a buzzer sounds and a warning green light is warned when concrete reaches a designated position through a monitor of the two lining trolleys, then the liftable detection device is retracted, and the vault grouting is stopped when a warning red light of the monitor is lighted, so that the vault is prevented from being emptied and the vault is prevented from being overmuch.
Drawings
The invention is further described below with reference to the accompanying drawings and examples:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the structure of the present invention;
fig. 3 is a construction flow chart of the present invention.
Detailed Description
As shown in fig. 1 and 2, the secondary lining trolley for preventing vault from being emptied in the present embodiment comprises a secondary lining trolley body 1 and a liftable detection device arranged in the middle of the secondary lining trolley body 1; the liftable detection device comprises a detection assembly 2, a turbine screw lifter 3 and a motor 4; the detection assembly 2 comprises a sleeve 21 coaxially arranged at the top of a screw of the turbine screw elevator 3, a first conductor 22 and a second conductor 23 which are respectively and independently arranged at the top of the inner wall of the sleeve 21 and are exposed out of the sleeve 21, and a monitor of which the positive electrode and the negative electrode are respectively and electrically connected with the first conductor 22 and the second conductor 23; the motor 4 drives the turbine screw rod lifter 3 to enable the sleeve 21 to slide along the vertical direction so as to enable the sleeve 21 to extend or retract into the trolley template 11 at the top of the two-lining trolley main body 1; the first electrical conductor 22 and the second electrical conductor 23 are insulated from each other. When the grouting of the arch top reaches the positions of the first conductor 22 and the second conductor 23, the anode and the cathode of the monitor are communicated due to the conduction of the concrete, and the monitor works to give out corresponding warning. The turbine screw lifter 3 is driven by the motor 4, and can enable the sleeve 21 to slide along the vertical direction, so that the positions of the first conductor 22 and the second conductor 23 are controlled, and the heights of the first conductor 22 and the second conductor 23 can be changed for different grouting equipment and different vault specifications. Meanwhile, the sleeve 21 can retract into the trolley template 11 at the top of the secondary lining trolley body 1 after warning by the monitor, so that the vault pouring is not influenced and the secondary lining trolley can be recycled.
In this embodiment, the monitor includes a buzzer 24, a warning red light 25 and a warning green light 26, which are respectively connected in series with the power supply on the secondary trolley, and the warning red light 25 is also connected in series with a controller 27. The controller 27 is a time delay controller, and a time relay may be used. When the concrete reaches the specified position, the buzzer 24 sounds, the warning green light 26 lights, the staff is reminded to retract the sleeve 21 and prepare to stop grouting of the arch, the controller 27 also starts timing at the moment, the time is calculated by the staff according to the heights of the first conductor 22 and the second conductor 23, the grouting speed and the arch curve, and the warning red light 25 lights when the time reaches, and the staff is reminded to stop grouting of the arch.
In this embodiment, the monitor is installed in the protection box 12, and the protection box 12 is fixed on the secondary lining trolley at a position 1.2-1.5m away from the ground through a box bracket. Because blasting and transportation vehicle go out the tiny fragments of stone, coal, etc. all can produce a large amount of dust to the air humidity is great in the tunnel, so the watch-dog must do waterproof dustproof work, avoids equipment damage or internal short circuit.
In this embodiment, the first conductor 22 and the second conductor 23 are symmetrical along the axis of the sleeve 21, are exposed at two sides of the sleeve 21 respectively, and are in contact with the outside, the formwork is vibrated during grouting, so as to avoid concrete cavities, and the first conductor 22 and the second conductor 23 are arranged at two sides along the sleeve 21, so that unexpected formation of a path due to concrete sputtering caused by vibration during grouting of the dome can be avoided to the greatest extent.
In this embodiment, the first conductor 22 and the second conductor 23 are sleeved with rubber sleeves, and the rubber sleeves are clamped in holes on the inner wall of the sleeve 21. The sleeve 21 is conductive, the first conductor 22 and the second conductor 23 are insulated from each other, and the insulating effect of the rubber sleeve is good, the cost is low, and the installation is simple.
In this embodiment, the top grouting holes 13 of the secondary lining trolley body 1 are disposed on two sides of the bottom of the top trolley template 11, and the height difference between the top grouting holes 13 and the highest point of the top trolley template 11 is 0.5-1.0m. The top grouting holes 13 are generally designed at the highest point of the top trolley form 11, but in the present embodiment, concrete is prevented from being sputtered onto the first conductor 22 and the second conductor 23 during grouting, so the top grouting holes 13 are designed at both sides, but in consideration of the grouting pressure of grouting equipment, the height difference between the top grouting holes 13 and the highest point of the top trolley form 11 cannot be too large, and the height difference is preferably 0.7m. Of course, a larger height difference can be employed with grouting equipment having a larger delivery pressure.
As shown in fig. 3, the invention further provides a construction method for preventing the vault from being emptied, which comprises the following steps:
Step one: and (5) preparing construction.
Carrying out laser measurement on the primary support section, and treating the support section which does not meet the requirements; when the level of the surrounding rock changes, the level of the lining section also changes correspondingly, but the lining of the poor surrounding rock section needs to be approved by a design unit and extends for 10m to the good surrounding rock section; and executing an admission system of the second lining trolley of the tunnel, wherein the second lining trolley can enter the tunnel only after passing acceptance check before entering the tunnel.
Step two: and the two lining trolleys are mounted in a whole.
The second lining trolley body is a second lining platform for processing steel bars, and steel rails are paved below the trolley to facilitate walking; installing auxiliary parts such as telescopic members, hydraulic systems, electric control systems and the like; meanwhile, some preparation work is also carried out for the concrete poured at the back: lifting a top die, opening a side die, detecting clearance and cleaning a template; installing a conveying pipeline, a baffle plate, a water stop bar and an embedded part; finally cleaning the machine bin, repairing the panel, reinforcing the trolley, coating the release agent and the like.
Step three: grouting and filling the arches on the two sides of the tunnel, and simultaneously starting the motor 4 to drive the turbine screw lifter 3 to lift the sleeve 21 to a specified position.
Concrete is injected into side molds at two sides of the tunnel (the cloth hanging trolley is provided with reinforcing steel bars when the waterproof board is paved, and the two linings only need to be poured with concrete), and a working window is opened on the side molds for concrete pouring and tamping. The casting concrete should be put in the warehouse as directly as possible, the end of the concrete conveying pipe should be provided with a hose to control the vertical distance between the pipe orifice and the casting surface, the concrete should not directly impact the waterproof board surface to flow to the casting position, and the vertical distance should be controlled within 1.2m to prevent the segregation of the concrete. Before the operation window is closed, the concrete slurry residue and other sundries near the window should be cleaned up, and the mold release agent should be painted to tightly close the window, so as to prevent the uneven patch or even slurry leakage on the concrete surface at the window. The position of the sleeve 21 is determined according to the grouting speed and the vault curve, and the situation that the vault is empty due to too much grouting caused by the fact that a concrete grouting pipe cannot be closed immediately after a monitor prompts the situation is avoided;
step four: grouting and filling the arch top; when the vault concrete is poured, if the buzzer 24 of the monitor sounds and the warning green light 26 is on, the concrete reaches a designated position;
the grouting hole spacing should be no more than 3m, and the number of reserved holes in the range of each template trolley should be no less than 4. Grouting and filling of the arch roof are preferably carried out after the intensity of lining concrete reaches 100%, the intensity level of the injected mortar meets the design requirement, and the grouting pressure is controlled within 0.1 MPa.
Step five: the starting motor 4 drives the turbine screw rod lifter 3 to retract the sleeve 21 into the trolley template 11 at the top of the secondary lining trolley body 1.
When the concrete reaches the specified position, the worker is prompted to start the motor 4 to drive the turbine screw elevator 3 and pays attention to the warning red light 25 in preparation for stopping the concrete dome grouting.
Step six: the warning red light 25 lights up to stop grouting the concrete dome.
The illumination of the warning red light 25 indicates that the grouting amount of the vault has reached an ideal value, and at this time, the concrete vault grouting is stopped, so that the vault can be prevented from being emptied, and too much vault grouting can be prevented.
Step seven: demolding and moving the trolley.
After detection, the vault void rate of the technical scheme is reduced to 0.1% from the original 4%, so that the vault void phenomenon can be obviously reduced, the construction cost is reduced, the construction progress is accelerated, and the construction quality is improved by adopting the technical scheme.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (5)
1. A two lining trolleys of prevention vault void, its characterized in that: comprises a second lining trolley main body and a lifting detection device arranged in the middle of the second lining trolley main body; the liftable detection device comprises a detection assembly, a worm gear screw lifter and a motor; the detection assembly comprises a sleeve coaxially arranged at the top of a screw of the worm gear screw elevator, a first conductor and a second conductor which are respectively and independently arranged at the top of the inner wall of the sleeve and are exposed out of the sleeve, and a monitor, the positive electrode and the negative electrode of which are respectively and electrically connected with the first conductor and the second conductor; the motor drives the worm gear screw rod lifter to enable the sleeve to slide along the vertical direction so as to enable the sleeve to extend or retract into the trolley template at the top of the trolley main body of the second lining trolley; the first conductor and the second conductor are mutually insulated, the first conductor and the second conductor are symmetrical along the axis of the sleeve, the top grouting holes of the two-lining trolley main body are arranged on two sides of the bottom of the top trolley template, and the height difference between the top grouting holes and the highest point of the top trolley template is 0.5-1.0m.
2. The secondary liner trolley for preventing vault collapse of claim 1, wherein: the monitor comprises a buzzer, a warning red light and a warning green light which are respectively connected with the power supply on the two-lining trolley in series, and the warning red light is also connected with a controller in series.
3. The secondary liner trolley for preventing vault collapse of claim 1, wherein: the monitor is arranged in a protection box body, and the protection box body is fixed on the secondary lining trolley at a position which is 1.2-1.5m away from the ground through a box body bracket.
4. The secondary liner trolley for preventing vault collapse of claim 1, wherein: the first conductor and the second conductor are sleeved with rubber sleeves, and the rubber sleeves are clamped in holes in the inner wall of the sleeve.
5. The secondary liner trolley for preventing vault collapse of claim 2, wherein: the construction method for preventing the vault from being emptied is characterized by comprising the following steps of:
step one: preparing construction;
step two: the second lining trolley is installed in a whole;
Step three: grouting and filling arch walls at two sides of a tunnel, and simultaneously starting a motor to drive a worm screw elevator to lift the sleeve to a specified position;
Step four: grouting and filling the arch top; when the vault concrete is poured, if a buzzer of the monitor sounds and a warning green light is on, the concrete reaches a designated position;
Step five: starting a motor to drive a worm screw elevator to retract the sleeve into the trolley template at the top of the secondary lining trolley main body;
Step six: the warning red light is turned on, and concrete arch grouting is stopped;
Step seven: demolding and moving the trolley.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910142919.7A CN109736848B (en) | 2019-02-26 | 2019-02-26 | Secondary lining trolley for preventing arch from falling out and construction method for preventing arch from falling out |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910142919.7A CN109736848B (en) | 2019-02-26 | 2019-02-26 | Secondary lining trolley for preventing arch from falling out and construction method for preventing arch from falling out |
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| CN109736848A CN109736848A (en) | 2019-05-10 |
| CN109736848B true CN109736848B (en) | 2024-11-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110656958B (en) * | 2019-10-15 | 2021-02-26 | 中铁五局集团第一工程有限责任公司 | Steady formula construction equipment |
| CN110617070B (en) * | 2019-10-15 | 2020-12-11 | 中铁五局集团第一工程有限责任公司 | Tunnel construction method |
| CN110645019B (en) * | 2019-10-15 | 2021-02-26 | 中铁五局集团第一工程有限责任公司 | An integrated tunnel construction equipment |
| CN110645020B (en) * | 2019-10-15 | 2021-02-26 | 中铁五局集团第一工程有限责任公司 | Construction equipment walking method |
| CN113047872B (en) * | 2021-03-09 | 2022-12-13 | 山东高速工程建设集团有限公司 | Two lining platform trucks of prevention vault sky |
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| CN109209442A (en) * | 2018-11-04 | 2019-01-15 | 福建省交通建设工程监理咨询有限公司 | Tunnel double-lining tee tube liquid level relay bomb shelter warning device |
| CN209637775U (en) * | 2019-02-26 | 2019-11-15 | 重庆交通建设(集团)有限责任公司 | Prevent the two lining trolleys that vault comes to nothing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3527106B2 (en) * | 1998-10-05 | 2004-05-17 | 鹿島建設株式会社 | Concrete placement method using formwork fitted with boxless foam |
| CN201306192Y (en) * | 2008-11-04 | 2009-09-09 | 刘廷国 | Tunnel lining hollow detection device |
| CN106837422A (en) * | 2017-02-17 | 2017-06-13 | 中铁二十局集团第三工程有限公司 | Tunnel double-lining pours into a mould concrete autoalarm |
| JP6957213B2 (en) * | 2017-06-05 | 2021-11-02 | 戸田建設株式会社 | Formwork contact detection sensor |
| CN107939416A (en) * | 2017-11-15 | 2018-04-20 | 中铁四局集团有限公司 | A Pre-warning Method for Preventing Concrete Evacuation of Tunnel Vault |
| CN108331601A (en) * | 2018-03-06 | 2018-07-27 | 中铁十六局集团第工程有限公司 | A kind of anti-device that comes to nothing of tunnel-liner |
| CN109026017A (en) * | 2018-07-26 | 2018-12-18 | 重庆交通建设(集团)有限责任公司 | Tunnel excavation support safe construction method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209442A (en) * | 2018-11-04 | 2019-01-15 | 福建省交通建设工程监理咨询有限公司 | Tunnel double-lining tee tube liquid level relay bomb shelter warning device |
| CN209637775U (en) * | 2019-02-26 | 2019-11-15 | 重庆交通建设(集团)有限责任公司 | Prevent the two lining trolleys that vault comes to nothing |
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