CN111910693A - Method and device for monitoring leakage of sealing belt between pipe joints of immersed tunnel - Google Patents
Method and device for monitoring leakage of sealing belt between pipe joints of immersed tunnel Download PDFInfo
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- CN111910693A CN111910693A CN201910375100.5A CN201910375100A CN111910693A CN 111910693 A CN111910693 A CN 111910693A CN 201910375100 A CN201910375100 A CN 201910375100A CN 111910693 A CN111910693 A CN 111910693A
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- 238000007789 sealing Methods 0.000 title claims abstract description 295
- 238000012544 monitoring process Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000008859 change Effects 0.000 claims abstract description 33
- 238000012806 monitoring device Methods 0.000 claims description 45
- 230000005540 biological transmission Effects 0.000 claims description 17
- 239000003566 sealing material Substances 0.000 claims description 17
- 230000004044 response Effects 0.000 claims description 14
- 239000013535 sea water Substances 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 230000008054 signal transmission Effects 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 239000000084 colloidal system Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
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- 230000008961 swelling Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
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- 239000004033 plastic Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
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Abstract
The invention discloses a method and a device for monitoring the leakage of a sealing belt between pipe joints of a immersed tunnel. The beneficial effects are as follows: the sealing cavity is externally monitored, so that the design cost and the manufacturing cost of the sealing strip are saved, the sealing and monitoring structure is simplified, and the sealing performance of the segment sealing structure is enhanced; the same inner sealing belt is designed by adopting a multi-structure pressure conduction component, and the unidirectional linear change and nonlinear sudden change of the pressure value are monitored, so that the accuracy degree of the monitoring result is enhanced; the timeliness and the safety of monitoring are improved; the construction concept of resource saving and environmental protection is met; the engineering cost is saved.
Description
Technical Field
The invention relates to the field of leakage monitoring of a sealing element between pipe joints, in particular to a method and a device for monitoring leakage of a sealing strip between pipe joints of a immersed tunnel.
Background
The water resistance of joints of tunnels by immersed tube method is very important. At present, two water stop belts of GINA and OMEGA are generally adopted to play the role of water prevention of the pipe joint. The GINA type rubber waterstop is a main waterproof component of the pipe joint connector and is also a first waterproof line of the pipe joint connector, and the immersed tube tunnel is externally sealed. The OMEGA type rubber waterstop is a second defense line for sealing the pipe joint and is used for internally sealing the immersed tunnel. However, since the GINA and OMEGA water stops mainly adopt a forced sealing structure, the sealing material is deformed by pre-tightening extrusion to realize sealing, the requirement on the performance of the sealing material is very high, the plastic deformation of the sealing material is large, the resilience performance in the later period is reduced, the sealing failure is easily caused, the leakage of the immersed tube joint is caused, and once the leakage of the immersed tube joint is caused, if the leakage cannot be timely detected and corresponding measures are taken, the huge economic loss is caused, the life safety of personnel can be harmed, and the serious threat to the marine ecological environment can be generated. The existing sealing tape monitoring methods are that a monitoring device is integrated with a sealing structure or communicated with a closed space, and the leakage amount of the sealing tape is measured after leakage occurs. However, the complexity of the segment structure is increased by the integrated design or the communicated design, the sealing performance of the tunnel is easily reduced, the design and manufacturing cost is also increased, in the immersed tube tunnel engineering, accumulated water, dust or other impurities often exist in the immersed tube joint along with the passage of time, the sealing performance is easily reduced, and the maintenance cost is increased.
Disclosure of Invention
The invention aims to provide a method and a device for monitoring leakage of a sealing belt between pipe joints of a immersed tunnel, so as to overcome the defects in the prior art.
The invention can be realized by the following technical scheme:
a method for monitoring leakage of a sealing belt between pipe sections of a immersed tube tunnel includes that the pipe sections of the immersed tube tunnel comprise two adjacent sections of end joints of the immersed tube tunnel, an outer sealing belt, an inner sealing belt and a sealed cavity formed by the end joints of the two adjacent sections of the immersed tube tunnel, the outer sealing belt and the inner sealing belt are arranged in a joint between the end joints of the two adjacent sections of the immersed tube tunnel, the outer sealing belt is made of elastic sealing materials and matched with the pipe body joint of the immersed tube tunnel at one side to extrude with the pipe body joint of the immersed tube tunnel at the other side to form an outer sealing structure which is a main pressure-bearing sealing structure, the inner sealing belt is made of elastic sealing materials and respectively and tightly attached with the end joints of the two adjacent sections of the immersed tube tunnel to form an inner sealing structure which is a pressure-sensitive sealing structure, and the outer surface of the inner sealing belt, namely the surface facing the inside of the immersed tube tunnel, and the end joints of the two The inner seam of the tunnel forms a groove, the outer surface of the inner sealing belt is the bottom surface of the groove, the sealing monitoring device comprises a pressure sensor, a signal amplifier and a signal converter, the sealing monitoring device is arranged inside the immersed tube tunnel, the pressure sensor of the sealing monitoring device is in pressure contact with the outer surface of the inner sealing belt through a pressure conduction component, gas is filled in a sealed cavity to apply pre-pressing, the pre-pressing is higher than the atmospheric pressure inside the immersed tube tunnel and lower than the seawater pressure outside the immersed tube tunnel, the sealing monitoring device is connected with a power supply, the pressure conduction component conducts the pressure to the pressure sensor, the pressure sensor converts the pressure into an electric signal, the electric signal is amplified and converted by the signal amplifier and the signal converter, and the amplified electric signal is transmitted to a monitoring center through a wired/wireless signal conduction device.
When the external sealing structure leaks, the pressure inside the sealed cavity is increased, the pressure between the outer surface of the inner sealing belt and the pressure conduction component is increased, the pressure conduction component conducts the pressure to the pressure sensor, the pressure sensor converts the pressure into an electric signal, the electric signal is amplified and converted by the signal amplifier, the amplified electric signal is transmitted to the monitoring center by the wired/wireless signal conduction device, and the monitoring center makes a response decision according to a preset algorithm and pressure change.
When the internal sealing structure leaks, the pressure inside the sealing cavity is reduced, the pressure between the outer surface of the inner sealing belt and the pressure conduction component is reduced, the pressure conduction component conducts the pressure to the pressure sensor, the pressure sensor converts the pressure into an electric signal, the electric signal is amplified and converted by the signal amplifier and the signal converter, the amplified electric signal is transmitted to the monitoring center by the wired/wireless signal conduction device, and the monitoring center makes a response decision according to a preset algorithm and pressure change.
The pressure conducting part is in surface contact with the outer surface of the inner sealing band.
The sealing monitoring device is fixedly arranged in a joint between end connectors of two adjacent sections of immersed tube tunnels.
The pressure sensor is in direct contact with the inner sealing band outer surface.
The monitoring center records the change time, the time length, the change value and the decision and outputs the result.
The monitoring center calculates and records the difference value between the monitoring data of each section of sealing tape of the same immersed tube tunnel in the same time period, monitors the change of the difference value, makes a response decision when the difference value changes, records the change time, the time length, the change value and the decision, and outputs the result.
The inner sealing strip is an OMEGA sealing strip, the pressure conduction component is in a long-handle crescent shape, the distance between two ends of a crescent opening part at the front part of the long-handle crescent shape is smaller than the inner diameter of the crescent shape, the two ends of the crescent opening part are in pressure contact with the bulge part of the inner sealing strip and clamped on the upper part of the bulge part, when the expansion deformation quantity of the inner sealing strip is increased, the bulge part and the pressure conduction component can slide relatively, and the bulge part continues to expand in the crescent shape.
At the initial stage of leakage of the outer sealing belt, the expansion deformation amount of the inner sealing belt is small, the pressure between the bulge part and the pressure conduction component is increased, the pressure applied to the two ends of the crescent-shaped opening part forms resultant force, and the resultant force is transmitted to the pressure sensor through the pressure conduction component and is reflected as pressure.
The expansion deformation of the inner sealing belt is increased along with the increase of the leakage amount of the outer sealing belt, the relative displacement between the bulge part and the pressure conduction part is increased, a portion of the bulging portion which does not receive the pressure of the pressure-transmitting member contact portion has entered the inside of the crescent-shaped portion of the pressure-transmitting member, and the pressure between the bulge portion and the pressure-transmitting member is increased to be greater than the frictional force between the outer surface of the inner seal band and the pressure-transmitting member, the bulge being slidable relative to the pressure-conducting member, the bulge continuing to expand inside the crescent shape, the pressure direction between the bulge part and the pressure conduction component changes, the pressure applied to the two ends of the crescent-shaped opening part forms resultant force, is conducted to the pressure sensor through the pressure conducting part, embodied as a tensile force/suddenly reduced pressure.
The method for monitoring the leakage of the sealing tape of the immersed tube tunnel pipe section as claimed in claim 2 is applied to the same section, and electric signals are respectively transmitted to the monitoring centers.
When the outer sealing belt leaks, the monitoring center makes a response decision according to the corresponding change of the corresponding signal of the pressure value change signal received by the method.
The utility model provides a device of monitoring immersed tube tunnel internode sealing strip leaks, includes two sections adjacent immersed tube tunnel end interface, outer sealing strip, interior sealing strip and by the airtight cavity of two sections adjacent immersed tube tunnel end interface, outer sealing strip, interior sealing strip formation, outer sealing strip and interior sealing strip setting are in the seam between two sections adjacent immersed tube tunnel end interface, outer sealing strip is made with elastic sealing material, cooperates with one side immersed tube tunnel body interface, extrudees with opposite side immersed tube tunnel interface, forms outside seal structure, for main pressure-bearing seal structure, interior sealing strip is made with elastic sealing material, closely laminates with two sections adjacent immersed tube tunnel end interface respectively, forms inside seal structure, inside seal structure is pressure sensitive seal structure, the surface of interior sealing strip that the interior sealing strip is towards immersed tube tunnel inside and two sections adjacent immersed tube tunnel end interface (1) are in the inside sealed structure of immersed tube tunnel The seam forms the recess, interior sealing strip surface does the bottom surface of recess, sealed monitoring devices sets up inside the immersed tube tunnel, sealed monitoring devices's pressure sensor pass through pressure conduction part with interior sealing strip surface pressure contact, fill gas in the airtight cavity and exert the pre-compaction, the pre-compaction is higher than the inside atmospheric pressure of immersed tube tunnel, and it is strong to be less than the outer sea water pressure of immersed tube tunnel, and sealed monitoring devices connects the power, but through signal amplifier and signal converter enlargeable and conversion the signal of telecommunication is for corresponding pressure numerical value and output.
The contact part of the pressure conduction part and the outer surface of the inner sealing belt is of a surface structure.
The outer surface of the inner sealing belt protrudes towards the interior of the immersed tube tunnel, and the contact surface of the pressure conduction part, which is in surface contact with the outer surface of the inner sealing belt, is arc-shaped and is matched with the outer surface of the inner sealing belt.
And a transition cushion layer is arranged between the pressure conduction part and the outer surface of the inner sealing belt and is matched with the outer surface of the inner sealing belt.
The pressure conducting part is adjustable in length.
The pressure conduction component is composed of a fixing rod and a contact rod, one end of the fixing rod is fixedly connected with the sealing monitoring device, the other end of the fixing rod is connected with the contact rod, one end of the contact rod is in pressure contact with the outer surface of the inner sealing strip, the other end of the contact rod is connected with the fixing rod, and the joint of the fixing rod and the contact rod is matched with each other to form a structure capable of adjusting the whole length of the pressure conduction component.
The component capable of adjusting the whole length of the pressure conduction component is a mechanical spiral component.
The part of adjustable pressure conduction part overall length is the piston structure, the piston pipe of piston structure is fixed to be set up on dead lever/contact lever, and contact lever/dead lever are the piston, during the installation the piston sleeve tubular construction fills liquid in the sealed cavity, makes pressure conduction part and interior sealing strip surface contact surface between the pressure reach the pressure value of predetermineeing, and sealed.
The pressure conduction part comprises dead lever, contact bar and intermediate junction spare, dead lever one end and sealed monitoring devices fixed connection, the other end are the concave surface shape, concave surface shape oral area to the contact bar extends, concave surface shape concave part with intermediate junction spare pressure contact, contact bar one end and interior sealing strip surface pressure contact, the other end is the concave surface shape, concave surface shape oral area to the dead lever extends, concave surface shape concave part with intermediate junction spare pressure contact, intermediate junction spare is the rubber bag, fills gas/liquid/colloid in the rubber bag during use, makes pressure reach the preset pressure value between pressure conduction part and the interior sealing strip surface contact surface to it is sealed.
The sealing monitoring device can respectively convert and amplify pressure value signals of the two pressure sensors and respectively transmit the pressure value signals to a monitoring center, the inner sealing belt is an OMEGA sealing belt, one of the pressure conduction part contact parts is of a surface structure and is in pressure contact with the outer surface of the inner sealing belt, when the expansion deformation of the inner sealing belt is increased, the pressure direction between the inner sealing belt bulge part and the pressure conduction part is unchanged, the other pressure conduction part is of a long-handle crescent shape, the distance between two ends of the long-handle crescent-shaped opening part is smaller than the inner diameter of the crescent shape, two ends of the crescent-shaped opening part are in pressure contact with the inner sealing belt bulge part and are clamped on the upper part of the bulge part, and when the expansion deformation of the inner sealing belt is increased, the relative displacement between the bulging portion and the pressure-transmitting member is increased, a portion of the bulging portion that does not receive the pressure of the pressure-transmitting member contact portion can enter the inside of the crescent-shaped portion of the pressure-transmitting member, and the bulging portion and the pressure-transmitting member can slide relative to each other, and the bulging portion can continue to expand inside the crescent-shaped portion.
After the technical scheme is adopted, the invention has the following beneficial effects:
(1) the sealing cavity is externally monitored, so that the design cost and the manufacturing cost of the sealing strip are saved, the sealing and monitoring structure is simplified, and the sealing performance of the segment sealing structure is enhanced;
(2) the same inner sealing belt is designed by adopting a multi-structure pressure conduction component, and the unidirectional linear change and nonlinear sudden change of the pressure value are monitored, so that the accuracy degree of the monitoring result is enhanced;
(3) the timeliness and the safety of monitoring are improved;
(4) the construction concept of resource saving and environmental protection is met;
(5) the construction and installation are simple and convenient, the later maintenance cost is low, and the engineering cost is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating the principle of the method for monitoring the leakage of the sealing band between the tube joints of the immersed tunnel according to the present invention;
FIG. 2 is a schematic view of the working condition of the device for monitoring the leakage of the sealing band between the tube joints of the immersed tunnel according to the present invention;
fig. 3 is a schematic view of the working condition of the device for monitoring the leakage of the sealing band between the pipe joints of the immersed tunnel according to the invention.
The figures are labeled as follows:
1. an immersed tunnel end interface; 3. an outer sealing band; 4. an inner sealing band; 5. sealing the cavity; 6. a groove; 7. a seal monitoring device; 8. a pressure sensor; 9. a pressure-conducting member; 10. a monitoring center; 11. a power source; 12. a signal amplifier; 13. a signal converter.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
The method and the device for monitoring the leakage of the sealing band between the pipe joints of the immersed tube tunnel according to the invention are described below with reference to the accompanying drawings (fig. 1-3).
As shown in fig. 1, the present invention provides a method for monitoring the leakage of a sealing tape between the pipe sections of a sinking pipe tunnel, which is schematically illustrated in principle, wherein the pipe sections of the sinking pipe tunnel comprise two adjacent sections of tunnel end joints 1 of the sinking pipe tunnel, an outer sealing tape 3, an inner sealing tape 4, and a sealed cavity 5 formed by the two adjacent sections of tunnel end joints 1 of the sinking pipe tunnel, the outer sealing tape 3 and the inner sealing tape 4 are arranged in the joint between the two adjacent sections of tunnel end joints 1 of the sinking pipe tunnel, the outer sealing tape 3 is made of elastic sealing material, is matched with the tunnel end joint of the sinking pipe tunnel on one side and is extruded with the tunnel end joint of the sinking pipe on the other side to form an outer sealing 3 structure, which is a main pressure-bearing sealing structure, the inner sealing tape 4 is made of elastic sealing material, and is tightly attached to the end joints 1 of the two adjacent sections of sinking pipe tunnel, the inner sealing structure is a pressure sensitive sealing structure, a groove 6 is formed between the surface of the outer surface of the inner sealing strip 4 facing the interior of the immersed tube tunnel and the joint of the end connectors 1 of two adjacent immersed tube tunnels in the interior of the immersed tube tunnel, the outer surface of the inner sealing strip 4 is the bottom surface of the groove 6, the sealing monitoring device 7 comprises a signal amplifier 12 and a signal converter 13, the sealing monitoring device 7 is arranged in the interior of the immersed tube tunnel, the pressure sensor 8 of the sealing monitoring device 7 is in pressure contact with the outer surface of the inner sealing strip 4 through a pressure conducting part 9, gas is filled in the sealed cavity 5 to apply pre-pressure, the pre-pressure is higher than the atmospheric pressure in the interior of the immersed tube tunnel and lower than the external seawater pressure of the immersed tube tunnel, the sealing monitoring device 7 is connected with a power supply 11, the pressure conducting part 9 conducts the pressure to the pressure sensor 8, and the pressure sensor, the electric signal is amplified and converted by a signal amplifier 12 and a signal converter 13, and the amplified electric signal is transmitted to the monitoring center 10 by a wired or wireless signal transmission means.
When the external sealing structure leaks, the internal pressure of the sealed cavity 5 is increased, the internal sealing belt 4 expands, the pressure between the outer surface of the internal sealing belt 4 and the pressure conduction part 9 is increased, the pressure conduction part 9 conducts the pressure to the pressure sensor 8, the pressure sensor 8 converts the pressure into an electric signal, the electric signal is amplified and converted by the sealing monitoring device 7 through the signal amplifier 12 and the signal converter 13, the amplified electric signal is transmitted to the monitoring center 10 through the wired or wireless signal conduction device, and the monitoring center 10 makes a response decision according to a preset algorithm and pressure change.
When the internal sealing structure leaks, the internal pressure of the sealing cavity 5 is reduced, the internal sealing belt 4 contracts, the pressure between the outer surface of the internal sealing belt 4 and the pressure conduction part 9 is reduced, the pressure conduction part 9 conducts the pressure to the pressure sensor 8, the pressure sensor 8 converts the pressure into an electric signal, the electric signal is amplified and converted by the sealing monitoring device 7 through the signal amplifier 12 and the signal converter 13, the amplified electric signal is transmitted to the monitoring center 10 through the wired or wireless signal conduction device, and the monitoring center 10 makes a response decision according to a preset algorithm and pressure change.
In said method the pressure-conducting part 9 is in surface contact with the outer surface of said inner sealing band 4.
The sealing monitoring device 7 is fixedly arranged in the joint between the end joints 1 of two adjacent sections of immersed tube tunnels.
As shown in fig. 2, the present invention provides a device for monitoring the leakage of a sealing tape between two sections of immersed tube tunnel pipe joints, wherein each immersed tube tunnel pipe joint comprises two adjacent sections of immersed tube tunnel end joints 1, an outer sealing tape 3, an inner sealing tape 4, and a sealed cavity 5 formed by the two adjacent sections of immersed tube tunnel end joints 1, the outer sealing tape 3 and the inner sealing tape 4 are arranged in a seam between the two adjacent sections of immersed tube tunnel end joints 1, the outer sealing tape 3 is made of elastic sealing material, is matched with one side immersed tube tunnel pipe joint and is extruded with the other side immersed tube tunnel joint to form an outer sealing structure, which is a main pressure-bearing sealing structure, the inner sealing tape 4 is made of elastic sealing material, and is respectively tightly attached to the two adjacent sections of immersed tube tunnel end joints 1 to form an inner sealing structure, and the inner sealing structure is a pressure-sensitive sealing structure, the outer surface of the inner sealing tape 4, namely the surface of the inner sealing tape 4 facing the interior of the immersed tube tunnel and the joint of the end interfaces 1 of two adjacent immersed tube tunnels in the interior of the immersed tube tunnel form a groove 6, the outer surface of the inner sealing strip 3 is the bottom surface of the groove 6, the sealing monitoring device 7 comprises a signal amplifier 12 and a signal converter 13, the sealing monitoring device 7 is arranged in the immersed tube tunnel, the pressure sensor 8 of the sealing monitoring device 7 is in pressure contact with the outer surface of the inner sealing belt 4, gas is filled in the closed cavity 5 to apply pre-pressing, the pre-pressure is higher than the atmospheric pressure inside the immersed tube tunnel and lower than the seawater pressure outside the immersed tube tunnel, the sealing monitoring device 7 is connected with a power supply, the pressure sensor 8 converts the pressure into an electric signal, the electric signal is amplified and converted by the signal amplifier 12 and the signal converter 13, the amplified electrical signals are transmitted to the monitoring center 10 by wired or wireless signal transmission means.
When the external sealing structure leaks, the internal pressure of the sealed cavity 5 is increased, the internal sealing strip 4 expands, the pressure between the outer surface of the internal sealing strip 4 and the pressure sensor 8 is increased, the pressure sensor 8 converts the pressure into an electric signal, the electric signal is amplified and converted by the sealing monitoring device 7, the amplified electric signal is transmitted to the monitoring center 10 by the wired or wireless signal transmission device, and the monitoring center 10 makes a response decision according to a preset algorithm and pressure change.
When the internal sealing structure leaks, the internal pressure of the sealing cavity 5 is reduced, the internal sealing belt 4 contracts, the pressure between the outer surface of the internal sealing belt 4 and the pressure sensor 8 is increased, the pressure sensor 8 converts the pressure into an electric signal, the electric signal is amplified and converted by the sealing monitoring device 7 through the signal amplifier 12 and the signal converter 13, the amplified electric signal is transmitted to the monitoring center 10 through the wired or wireless signal transmission device, and the monitoring center 10 makes a response decision according to a preset algorithm and pressure change.
The monitoring center 10 also records the change time, duration, change value and decision, and outputs the result.
The monitoring center 10 also calculates and records the difference between the monitoring data of each section of sealing tape of the same immersed tube tunnel in the same time period, monitors the change of the difference, makes a response decision when the difference changes, records the change time, the time length, the change value and the decision, and outputs the result.
The inner sealing strip is made of OMEGA sealing strips, the pressure conduction part 9 is in a long-handle crescent shape, the distance between two ends of a crescent-shaped opening part at the front part of the long-handle crescent shape is smaller than the inner diameter of the crescent shape, the two ends of the crescent-shaped opening part are in pressure contact with the bulge part of the inner sealing strip 4 and clamped on the upper part of the bulge part, when the expansion deformation quantity of the inner sealing strip 4 is increased, the bulge part and the pressure conduction part 9 can slide relatively, and the bulge part continues to expand in the crescent shape.
At the initial stage of leakage of the outer seal band, the amount of expansion deformation of the inner seal band 4 is small, the pressure between the bulge portion and the pressure transmission member 9 is increased, and the pressure applied to both ends of the crescent-shaped opening portion forms a resultant force, which is transmitted to the pressure sensor 8 through the pressure transmission member 9 to be reflected as pressure.
As the amount of leakage of the outer seal band 3 increases, the amount of swelling deformation of the inner seal band 4 increases, the relative displacement between the bulge portion and the pressure transmission member 9 increases, the portion of the bulge portion not subjected to the pressure of the contact portion of the pressure transmission member 9 enters the crescent-shaped portion of the pressure transmission member 9, and the pressure between the bulge portion and the pressure transmission member 9 increases to be greater than the frictional force between the outer surface of the inner seal band 4 and the pressure transmission member 9, the bulge portion and the pressure transmission member 9 are slidable relative to each other, the bulge portion continues to swell inside the crescent shape, the pressure direction between the bulge portion and the pressure transmission member 9 changes, the pressure applied to both ends of the crescent-shaped opening portion forms a resultant force, and the resultant force is transmitted to the pressure sensor 8 through the pressure transmission member 9 and is reflected as a tensile force, or as a sudden decrease in pressure.
The above monitoring method is applied to the same segment, and electric signals are respectively transmitted to the monitoring center 10.
When the outer sealing belt 3 leaks, the monitoring center 10 makes a response decision according to the corresponding change of the corresponding signal of the pressure value change signal received by the method.
As shown in fig. 3, the present invention provides a device for monitoring the leakage of a sealing strip between two sections of immersed tube tunnel pipe, the device comprises two adjacent sections of immersed tube tunnel end joints 1, an outer sealing strip 3, an inner sealing strip 4, and a sealed cavity 5 formed by the two adjacent sections of immersed tube tunnel end joints 1, the outer sealing strip 3 and the inner sealing strip 4 are arranged in a seam between the two adjacent sections of immersed tube tunnel end joints 1, the outer sealing strip 3 is made of elastic sealing material, is matched with the pipe joint of one side immersed tube tunnel, and is extruded with the pipe joint of the other side immersed tube tunnel to form an outer sealing structure which is a main pressure-bearing sealing structure, the inner sealing strip 4 is made of elastic sealing material, and is respectively tightly attached to the end joints 1 of the two adjacent sections of immersed tube tunnels to form an inner sealing structure, and the inner sealing structure is a pressure-, the outer surface of the inner sealing strip 4, namely the surface of the inner sealing strip 4 facing the interior of the immersed tube tunnel and the joints of the end connectors 1 of two adjacent immersed tube tunnels in the interior of the immersed tube tunnel form a groove 6, the outer surface of the inner sealing strip 4 is the bottom surface of the groove 6, the sealing monitoring device 7 comprises a signal amplifier 12 and a signal converter 13, the sealing monitoring device 7 is arranged in the interior of the immersed tube tunnel, a pressure sensor 8 of the sealing monitoring device 7 is in pressure contact with the outer surface of the inner sealing strip 4 through a pressure conducting part 9, gas is filled in the closed cavity 5 to apply pre-pressure, the pre-pressure is higher than the air pressure in the interior of the immersed tube tunnel and lower than the seawater pressure outside the immersed tube tunnel, the sealing monitoring device 7 is connected with a power supply 11, and the sealing monitoring device 7 amplifies and converts the electric signal into a corresponding pressure value through the signal amplifier 12, the pressure conducting part 9 is adjustable and lengthened in length.
The contact part of the pressure conducting part 9 and the outer surface of the inner sealing belt 4 can be a surface structure and is in surface contact with the outer surface of the inner sealing belt 4. The arrangement can reduce the abrasion of the contact surface or the cutting or stabbing damage and prolong the service life of the device.
The outer surface of the inner sealing belt 4 protrudes towards the interior of the immersed tube tunnel, and the contact surface of the pressure conduction part 9, which is in surface contact with the outer surface of the inner sealing belt 4, is arc-shaped and is matched with the outer surface of the inner sealing belt 4.
A transition cushion layer is arranged between the pressure conduction part 9 and the outer surface of the inner sealing belt 4, and the transition cushion layer is matched with the outer surface of the inner sealing belt 4. The arrangement can reduce the abrasion or cutting damage of the contact surface and prolong the service life of the device.
The pressure conduction part 9 is adjustable in length, and the specific structure can be any one of the structures which can adjust the length and do not obviously reduce the strength in the prior art such as a mechanical screw, an air bag, hydraulic pressure and a bayonet sleeve. The pressure conduction part 9 can be composed of a fixed rod and a contact rod, one end of the fixed rod is fixedly connected with the sealing monitoring device 7, the other end of the fixed rod is connected with the contact rod, one end of the contact rod is in pressure contact with the outer surface of the inner sealing belt 4, the other end of the contact rod is connected with the fixed rod, and the joint of the fixed rod and the contact rod is mutually matched to form a structure capable of adjusting the whole length of the pressure conduction part 9.
The part capable of adjusting the whole length of the pressure transmission part 9 can also be a piston structure, a piston pipe of the piston structure is fixedly arranged on the fixed rod or the contact rod, the other end of the piston structure is a piston, liquid is filled in a sealing cavity of the piston sleeve structure during installation, and the pressure between the pressure transmission part 9 and the outer surface contact surface of the inner sealing belt 4 reaches a preset pressure value and is sealed.
The pressure conduction part 9 comprises dead lever, contact lever and intermediate junction spare, dead lever one end and sealed monitoring devices 7 fixed connection, the other end are the concave surface shape, concave surface shape oral area to the contact lever extends, concave surface shape concave part with intermediate junction spare pressure contact, contact lever one end and interior sealing strip 4 surface pressure contact, the other end is the concave surface shape, concave surface shape oral area to the dead lever extends, concave surface shape concave part with intermediate junction spare pressure contact, intermediate junction spare is the rubber bag, fills gas or liquid or colloid in the rubber bag during the use, makes pressure reach preset pressure value between pressure conduction part 9 and the interior sealing strip 4 surface contact surface to it is sealed.
The inner sealing belt 4 is an OMEGA sealing belt, the device comprises two pressure sensors 8 and two pressure conduction parts 9 respectively connected with the two pressure sensors 8, the sealing monitoring device 7 can respectively convert and amplify pressure value signals of the two pressure sensors 8 and respectively transmit the pressure value signals to a monitoring center, one of the pressure conduction parts 9 is of a surface structure and is in pressure contact with the outer surface of the inner sealing belt 4, when the expansion deformation quantity of the inner sealing belt 4 is increased, the pressure direction between the bulge part of the inner sealing belt 4 and the pressure conduction part 9 is unchanged, the other pressure conduction part 9 is of a long-handle crescent shape, the distance between two ends of a crescent opening part of the long-handle crescent shape is smaller than the inner diameter of the crescent shape, the two ends of the crescent opening part are in pressure contact with the bulge part of the inner sealing belt 44 and are clamped on the bulge part, when the amount of swelling deformation of the inner seal tape 4 increases, the relative displacement between the bulging portion and the pressure transmission member 9 increases, a portion of the bulging portion which does not receive the pressure of the contact portion of the pressure transmission member 9 can enter the inside of the crescent-shaped portion of the pressure transmission member 9, and the bulging portion and the pressure transmission member 9 can slide relative to each other, and the bulging portion can continue to swell inside the crescent-shaped portion.
The difference between the first working condition and the second working condition is that the sealing belt is in different leakage conditions.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (18)
1. A method for monitoring the leakage of a sealing belt between pipe joints of a immersed tunnel is characterized in that: the immersed tube tunnel pipe joint comprises two adjacent immersed tube tunnel end part interfaces (1), an outer sealing belt (3), an inner sealing belt (4) and a sealed cavity (5) formed by the two adjacent immersed tube tunnel end part interfaces (1), the outer sealing belt (3) and the inner sealing belt (4), wherein the outer sealing belt (3) and the inner sealing belt (4) are arranged in a joint between the two adjacent immersed tube tunnel end part interfaces (1), the outer sealing belt (3) is made of elastic sealing materials, is matched with the immersed tube tunnel pipe body interface on one side and is extruded with the immersed tube tunnel pipe interface on the other side to form an outer sealing structure which is a main pressure-bearing sealing structure, the inner sealing belt (4) is made of elastic sealing materials and is respectively tightly attached to the two adjacent immersed tube tunnel end part interfaces (1) to form an inner sealing structure which is a pressure-sensitive sealing structure, the outer surface of the inner sealing strip (4), namely the surface of the inner sealing strip (4) facing the interior of the immersed tube tunnel and the joint of the end connectors (1) of two adjacent immersed tube tunnels in the interior of the immersed tube tunnel form a groove (6), the outer surface of the inner sealing strip (4) is the bottom surface of the groove (6), the sealing monitoring device (7) comprises a pressure sensor (8), a signal amplifier (12) and a signal converter (13), the sealing monitoring device (7) is arranged in the interior of the immersed tube tunnel, the pressure sensor (8) of the sealing monitoring device (7) is in pressure contact with the outer surface of the inner sealing strip (4) through a pressure conducting part (9), gas is filled in the closed cavity (5) to apply pre-pressing, the pre-pressing pressure is higher than the atmospheric pressure in the interior of the immersed tube tunnel and lower than the seawater pressure outside the immersed tube tunnel, and the sealing monitoring device (7) is connected with a, the pressure transmission component (9) transmits pressure to the pressure sensor (8), the pressure sensor (8) converts the pressure into an electric signal, the electric signal is amplified and converted by a signal amplifier (12) and a signal converter (13), and the amplified electric signal is transmitted to the monitoring center (10) by a wired/wireless signal transmission device;
when the external sealing structure leaks, the internal pressure of the sealed cavity (5) is increased, the pressure between the outer surface of the inner sealing belt (4) and the pressure conduction component (9) is increased, the pressure conduction component (9) conducts the pressure to the pressure sensor (8), the pressure sensor (8) converts the pressure into an electric signal, the electric signal is amplified and converted by the signal amplifier (12), the amplified electric signal is transmitted to the monitoring center (10) by the wired/wireless signal conduction device, and the monitoring center (10) makes a response decision according to a preset algorithm and pressure change;
when the internal sealing structure leaks, the pressure inside the sealing cavity is reduced, the pressure between the outer surface of the inner sealing belt (4) and the pressure conduction component (9) is reduced, the pressure conduction component (9) conducts the pressure to the pressure sensor (8), the pressure sensor (8) converts the pressure into an electric signal, the electric signal is amplified and converted by the signal amplifier (12) and the signal converter (13), the amplified electric signal is transmitted to the monitoring center (10) through the wired/wireless signal conduction device, and the monitoring center (10) makes a response decision according to a preset algorithm and pressure change.
2. The method of claim 1, wherein the method comprises the steps of: the pressure conducting part (9) is in surface contact with the outer surface of the inner sealing belt (4).
3. The method of claim 1, wherein the method comprises the steps of: and the sealing monitoring device (7) is fixedly arranged in a joint between the end interfaces (1) of two adjacent sections of immersed tube tunnels.
4. The method of claim 1, wherein the method comprises the steps of: the pressure sensor (8) is in direct contact with the outer surface of the inner sealing band (4).
5. The method for monitoring the sealing tape leakage between the tube segments of the immersed tunnel according to the claims 1 to 4, wherein: the monitoring center (10) records the change time, the time length, the change value and the decision and outputs the result.
6. The method of claim 5, wherein the method comprises the steps of: the monitoring center (10) calculates and records the difference value between the monitoring data of each section of sealing tape of the same immersed tube tunnel in the same time period, monitors the change of the difference value, makes a response decision when the difference value changes, records the change time, the time length, the change value and the decision, and outputs the result.
7. The method of claim 1, wherein the method comprises the steps of: the inner sealing strip (4) is an OMEGA sealing strip, the pressure conduction component (9) is in a long-handle crescent shape, the distance between two ends of a crescent-shaped opening part at the front part of the long-handle crescent shape is smaller than the inner diameter of the crescent shape, the two ends of the crescent-shaped opening part are in pressure contact with the bulge part of the inner sealing strip (4) and clamped on the upper part of the bulge part, when the expansion deformation quantity of the inner sealing strip (4) is increased, the bulge part and the pressure conduction component (9) can slide relatively, and the bulge part continues to expand in the crescent shape;
in the initial stage of leakage of the outer seal band (3), the amount of expansion deformation of the inner seal band (4) is small, the pressure between the bulge part and the pressure conduction component (9) is increased, the pressure applied to the two ends of the crescent-shaped opening part forms a resultant force, and the resultant force is conducted to the pressure sensor (8) through the pressure conduction component (9) and is reflected as pressure;
the amount of expansion deformation of the inner seal belt (4) is increased along with the increase of the leakage amount of the outer seal belt (3), the relative displacement between the bulge part and the pressure conduction component (9) is increased, when the part of the bulge part which is not subjected to the pressure of the contact part of the pressure conduction component (9) enters the crescent-shaped part of the pressure conduction component (9), and the pressure between the bulge part and the pressure conduction component (9) is increased to be larger than the friction force between the outer surface of the inner seal belt (4) and the pressure conduction component (9), the bulge part and the pressure conduction component (9) can slide relatively, the bulge part continues to expand in the crescent-shaped part, the pressure direction between the bulge part and the pressure conduction component (9) is changed, the pressure applied to the two ends of the crescent-shaped opening part forms a resultant force, and the resultant force is conducted to the pressure sensor (8) through the pressure conduction component (9), embodied as a tensile force/sudden decrease in pressure.
8. The method of claim 7, wherein the method comprises the steps of: the method for monitoring the leakage of the sealing tape of the immersed tube tunnel pipe section is applied to the same section, and an electric signal is respectively transmitted to the monitoring center (10);
when the outer sealing belt (3) leaks, the monitoring center (10) makes a response decision according to the corresponding change of the corresponding signal of the pressure value change signal received by the method.
9. The utility model provides a device that monitoring immersed tube tunnel internode sealing strip leaked which characterized in that: the sealing structure comprises two adjacent sections of immersed tube tunnel end connectors (1), an outer sealing strip (3), an inner sealing strip (4) and a sealed cavity (5) formed by the two adjacent sections of immersed tube tunnel end connectors (1), the outer sealing strip (3) and the inner sealing strip (4), wherein the outer sealing strip (3) and the inner sealing strip (4) are arranged in a joint between the two adjacent sections of immersed tube tunnel end connectors (1), the outer sealing strip (3) is made of elastic sealing materials, is matched with one side immersed tube tunnel body connector and is extruded with the other side immersed tube tunnel connector to form an outer sealing structure which is a main pressure-bearing sealing structure, the inner sealing strip (4) is made of elastic sealing materials and is respectively tightly attached to the two adjacent sections of immersed tube tunnel end connectors (1) to form an inner sealing structure which is a pressure-sensitive sealing structure, the outer surface of the inner sealing tape (4), namely the surface of the inner sealing tape (4) facing the interior of the immersed tube tunnel and the joint of the end joints (1) of two adjacent immersed tube tunnels in the interior of the immersed tube tunnel form a groove (6), the outer surface of the inner sealing belt (4) is the bottom surface of the groove (6), the sealing monitoring device (7) is arranged in the immersed tube tunnel, a pressure sensor (8) of the sealing monitoring device (7) is in pressure contact with the outer surface of the inner sealing belt (4) through a pressure conducting part (9), gas is filled in the closed cavity (5) to apply pre-pressing, the pre-pressure is higher than the internal air pressure of the immersed tube tunnel and lower than the external seawater pressure of the immersed tube tunnel, the sealing monitoring device (7) is connected with a power supply (11), the signal amplifier (12) and the signal converter (13) can amplify and convert the electric signals into corresponding pressure values and output the pressure values.
10. The apparatus according to claim 9, wherein said means for monitoring the leakage of said sealing band between the tube segments of the immersed tunnel comprises: the contact part of the pressure conduction part (9) and the outer surface of the inner sealing belt (4) is of a surface structure.
11. The apparatus according to claim 10, wherein said means for monitoring the leakage of said sealing band between the tube segments of the immersed tunnel comprises: the outer surface of the inner sealing belt (4) protrudes towards the interior of the immersed tube tunnel, and the contact surface of the pressure conduction part (9) and the outer surface of the inner sealing belt (4) in surface contact is arc-shaped and is matched with the outer surface of the inner sealing belt (4).
12. The apparatus according to claim 11, wherein said means for monitoring the leakage of said sealing band between the tube segments of the immersed tunnel comprises: and a transition cushion layer is arranged between the pressure conduction part (9) and the outer surface of the inner sealing belt (4), and the transition cushion layer is matched with the outer surface of the inner sealing belt (4).
13. The apparatus according to claim 9, wherein said means for monitoring the leakage of said sealing band between the tube segments of the immersed tunnel comprises: the pressure conducting part (9) is adjustable in length.
14. The apparatus according to claim 13, wherein said means for monitoring the leakage of said sealing band between the tube segments of the immersed tunnel comprises: the pressure conduction component (9) is composed of a fixing rod and a contact rod, one end of the fixing rod is fixedly connected with the sealing monitoring device (7), the other end of the fixing rod is connected with the contact rod, one end of the contact rod is in pressure contact with the outer surface of the inner sealing belt (4), the other end of the contact rod is connected with the fixing rod, and the joint of the fixing rod and the contact rod is matched with each other to form a structure capable of adjusting the whole length of the pressure conduction component (9).
15. The apparatus according to claim 14, wherein said means for monitoring the leakage of said sealing band between the tube segments of the immersed tunnel comprises: the part capable of adjusting the whole length of the pressure conduction part (9) is a mechanical spiral part.
16. The apparatus according to claim 14, wherein said means for monitoring the leakage of said sealing band between the tube segments of the immersed tunnel comprises: the part capable of adjusting the whole length of the pressure conduction part (9) is of a piston structure, a piston tube of the piston structure is fixedly arranged on a fixed rod/contact rod, the contact rod/fixed rod is a piston, liquid is filled into a sealing cavity of the piston sleeve structure during installation, and the pressure between the pressure conduction part (9) and the outer surface contact surface of the inner sealing strip (4) reaches a preset pressure value and is sealed.
17. The apparatus according to claim 14, wherein said means for monitoring the leakage of said sealing band between the tube segments of the immersed tunnel comprises: pressure conduction part (9) comprises dead lever, contact bar and intermediate junction spare, dead lever one end and sealed monitoring devices (7) fixed connection, the other end are the concave surface shape, concave surface shape oral area to the contact bar extends, concave surface shape concave part with intermediate junction spare pressure contact, contact bar one end and interior sealing strip (4) surface pressure contact, the other end is the concave surface shape, concave surface shape oral area to the dead lever extends, concave surface shape concave part with intermediate junction spare pressure contact, intermediate junction spare is the rubber bag, fills gas/liquid/colloid in the rubber bag during the use, makes pressure reach preset pressure value between pressure conduction part (9) and the interior sealing strip (4) surface contact surface to it is sealed.
18. The apparatus according to claim 9, wherein said means for monitoring the leakage of said sealing band between the tube segments of the immersed tunnel comprises: the device comprises two pressure sensors (8) and two pressure conduction components (9) which are respectively connected with the two pressure sensors (8), the sealing monitoring device (7) can respectively convert and amplify pressure value signals of the two pressure sensors (8) and respectively transmit the pressure value signals to a monitoring center (10), the inner sealing belt (4) is an OMEGA sealing belt, the contact part of one pressure conduction component (9) is of a surface structure and is in pressure contact with the outer surface of the inner sealing belt (4), when the expansion deformation quantity of the inner sealing belt (4) is increased, the pressure direction between the bulge part of the inner sealing belt (4) and the pressure conduction component (9) is unchanged, the other pressure conduction component (9) is of a long-handle crescent shape, the distance between two ends of a crescent-shaped opening part of the long-handle crescent shape is smaller than the inner diameter of the crescent shape, and the two ends of the crescent-shaped opening part are in pressure contact with the bulge part of the inner sealing belt (4), when the inner seal band (4) is expanded and deformed by being clamped on the upper part of the bulge part, the relative displacement between the bulge part and the pressure conduction component (9) is increased, the part of the bulge part which is not subjected to the pressure of the contact part of the pressure conduction component (9) can enter the crescent-shaped part of the pressure conduction component (9), the bulge part and the pressure conduction component (9) can slide relatively, and the bulge part can continue to expand in the crescent shape.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910375100.5A CN111910693A (en) | 2019-05-07 | 2019-05-07 | Method and device for monitoring leakage of sealing belt between pipe joints of immersed tunnel |
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| CN201910375100.5A CN111910693A (en) | 2019-05-07 | 2019-05-07 | Method and device for monitoring leakage of sealing belt between pipe joints of immersed tunnel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607342A (en) * | 2021-07-30 | 2021-11-05 | 中船黄埔文冲船舶有限公司 | Immersed tube tunnel steel shell bulkhead seal inspection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607342A (en) * | 2021-07-30 | 2021-11-05 | 中船黄埔文冲船舶有限公司 | Immersed tube tunnel steel shell bulkhead seal inspection method |
| CN113607342B (en) * | 2021-07-30 | 2024-05-03 | 中船黄埔文冲船舶有限公司 | Sealing inspection method for steel shell compartment of immersed tube tunnel |
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