CN108240000B

CN108240000B - Immersed tube tunnel tube joint structure

Info

Publication number: CN108240000B
Application number: CN201810021992.4A
Authority: CN
Inventors: 陈长卿; 潘树杰; 何军; 佟安岐; 王国良; 杨柳
Original assignee: China State Construction Engineering Hong Kong Ltd
Current assignee: China State Construction Engineering Hong Kong Ltd
Priority date: 2018-01-10
Filing date: 2018-01-10
Publication date: 2019-12-20
Anticipated expiration: 2038-01-10
Also published as: CN108240000A

Abstract

The invention discloses a immersed tube tunnel pipe joint structure, which comprises at least two waterproof belt assemblies, a first fireproof assembly and a second fireproof assembly, wherein the first fireproof assembly comprises: the protection plate assembly comprises a first fire prevention plate and a second fire prevention plate which are arranged at intervals; a thermal insulation member positioned between the first and second fire shield panels; one end of the flexible fireproof belt is connected with the heat insulation piece, and the other end of the flexible fireproof belt is connected with a pipeline; the second fire prevention assembly includes: the first fireproof filling piece is fixedly connected to the bottom wall of one pipeline and extends towards the other pipeline; the second fireproof filling piece is fixedly connected to the bottom wall of the other pipeline; and the third fireproof plate covers the joint of the first fireproof filling piece and the second fireproof filling piece. The technical scheme of the invention can simultaneously meet the requirements of fire-proof aging and displacement.

Description

Immersed tube tunnel tube joint structure

Technical Field

The invention relates to the technical field of immersed tube tunnels, in particular to a pipe joint structure of an immersed tube tunnel.

Background

In immersed tube method construction tunnel, the junction between two adjacent pipelines need adopt the waterproof tape subassembly, rubber sealing rubber strip for example connects, prevents that outside moisture from permeating the pipeline through this junction in, this waterproof tape subassembly must satisfy the fire prevention requirement in design year (for example 120 years) except that the vertical flexible displacement between the tunnel tube festival needs to be satisfied to guarantee the whole fire behavior of tunnel structure. If fire breaks out in the pipeline, this condition of fire will certainly influence the life of waterproof tape subassembly, consequently, current general practice is to set up a PLASTIC LAMINATED to realize the fire prevention demand of waterproof tape subassembly, however, current PLASTIC LAMINATED has following problem: only set up the PLASTIC LAMINATED, through experimental detection, current fire prevention design reaches two hours's fire prevention demand, also promptly, can not lead to the fact the influence to waterproof area subassembly in two hours of getting on a fire in the pipeline, and two hours ' fire prevention ageing efficiency has can't realize effectual fire prevention demand. Meanwhile, the two adjacent pipelines need longitudinal displacement, and the conventional joint structure is only provided with a fireproof plate and cannot meet the requirement of displacement.

Disclosure of Invention

The invention mainly aims to provide a pipe joint structure of a immersed tube tunnel, aiming at enabling a fireproof assembly to meet the requirements of fireproof timeliness and displacement at the same time.

In order to achieve the above object, the pipe joint structure of the immersed tube tunnel provided by the present invention comprises at least two waterproof belt assemblies, a first fireproof assembly and a second fireproof assembly, wherein one of the waterproof belt assemblies and the first fireproof assembly are connected between two adjacent pipes at intervals and located on top walls of the two pipes, one of the waterproof belt assemblies and the second fireproof assembly are connected between two adjacent pipes at intervals and located on bottom walls of the two pipes, the first fireproof assembly and the second fireproof assembly are located between the two waterproof belt assemblies, and the first fireproof assembly comprises:

the protection plate assembly comprises a first fire-proof plate and a second fire-proof plate which are arranged at intervals, one ends of the first fire-proof plate and the second fire-proof plate are connected with a pipeline, and the other ends of the first fire-proof plate and the second fire-proof plate are movably connected with another pipeline;

an insulation between the first and second fire resistant panels; and

the flexible fireproof belt is positioned between the first fireproof plate and the second fireproof plate, one end of the flexible fireproof belt is connected with the heat insulation piece, and the other end of the flexible fireproof belt is connected with a pipeline;

the second fire prevention assembly includes:

the first fireproof filling piece is fixedly connected to the bottom wall of one pipeline and extends towards the other pipeline;

the first fireproof filling piece and the second fireproof filling piece cover the waterproof belt assembly when abutting against each other;

and the third fireproof plate is fixedly connected to one of the first fireproof filling piece or the second fireproof filling piece and covers the joint of the first fireproof filling piece and the second fireproof filling piece.

Optionally, first fire prevention packing includes first installation department and shielding part, first installation department with one the tip fixed connection of pipeline, shielding part connect in first installation department to extend towards another pipeline, shielding part is located the top of waterproof band subassembly, and be used for with second fire prevention packing butt.

Optionally, the shielding portion is spaced apart from the waterproof strip assembly.

Optionally, a first blocking piece is further arranged between the first mounting portion and the waterproof belt assembly.

Optionally, the second fireproof filling piece comprises a second installation part and an abutting part, the second installation part is fixedly connected with the end part of the pipeline, and the abutting part is arranged on the surface of the second installation part facing the shielding part and is used for abutting against the shielding part.

Optionally, a second barrier is further disposed between the abutting portion and the waterproof strip assembly.

Optionally, the upper surface of first fire prevention packing piece is equipped with the groove of stepping down, the groove of stepping down is close to the setting of second fire prevention packing piece, the upper surface of second fire prevention packing piece corresponds the groove of stepping down is equipped with the mounting groove, step down the groove with the mounting groove intercommunication forms the sliding space, the third fire prevention board is fixed to be located the groove of stepping down or in the mounting groove, and with the sliding space relative slip.

Optionally, the third fire prevention plate is fixed to the receding groove or the mounting groove through screws.

Optionally, the second fire prevention assembly further comprises: the bonding sheet covers the abdicating groove and the notch of the mounting groove.

Optionally, the range of the thickness H1 of the first fireproof plate is: h1 is more than or equal to 28.5mm and less than or equal to 36 mm;

and/or the thickness of the second fire prevention plate H2 has a range value of: h2 is more than or equal to 28.5mm and less than or equal to 36 mm;

and/or the heat insulation piece is made of asbestos, and the range value of the thickness H3 of the heat insulation piece is as follows: h3 is more than or equal to 120mm and less than or equal to 150 mm;

and/or, the one end that deviates from of heat insulating part flexible fire prevention area is equipped with supplementary fire prevention area, this supplementary fire prevention area one end with the heat insulating part is connected, and the other end is connected with a pipeline.

In the technical scheme of the invention, a waterproof belt assembly is arranged between the top walls of two adjacent pipelines to prevent external moisture from entering the pipelines from the upper sides of the two pipelines. First fire prevention subassembly sets up in waterproof band subassembly's below, can prevent that the inside intensity of a fire of pipeline from supreme influence waterproof band subassembly down to protection waterproof band subassembly. Further set up first fire prevention subassembly into first PLASTIC LAMINATED, the heat insulating part, and second PLASTIC LAMINATED, make the inside intensity of a fire of pipeline carry out the separation via first PLASTIC LAMINATED earlier, the setting of heat insulating part further prevents the high temperature of first PLASTIC LAMINATED and makes the air temperature of neighbouring waterproof tape subassembly part too high, set up the second PLASTIC LAMINATED at last, make the inside intensity of a fire of pipeline to the influence of waterproof tape subassembly fall to minimumly, through experimental detection, as above the fire prevention design can reach four hours's fire prevention demand at least, also, can not lead to the fact the influence to the waterproof tape subassembly in getting on a fire in the pipeline within four hours, thereby very big improvement the service life of waterproof tape subassembly. Simultaneously, the one end and the pipe connection of first PLASTIC LAMINATED and second PLASTIC LAMINATED, the other end and another pipeline swing joint of first PLASTIC LAMINATED and second PLASTIC LAMINATED, when carrying out longitudinal displacement between two pipelines, the demand of displacement also can be satisfied to first PLASTIC LAMINATED and second PLASTIC LAMINATED that so set up, and simultaneously, in order to prevent at the in-process that removes, prevent that the temperature from not setting up the position transmission of heat insulating part from first PLASTIC LAMINATED and second PLASTIC LAMINATED, set up flexible fire prevention area in the one end of heat insulating part, this flexible fire prevention area can realize flexible and folding, and then prevent overheated temperature from this transmission, further promote the fire behavior of first fire prevention subassembly.

And, to the fire prevention of lateral wall junction under two pipelines, can adopt the fire resistive construction who is similar to the lateral wall, certainly, in order to simplify the structure, through setting up the second fire prevention subassembly into the first fire prevention filling member of connecting a pipeline diapire and the second fire prevention filling member of connecting another pipeline diapire, the two is the waterproof subassembly of taking of shroud when mutual butt for the inside intensity of a fire of pipeline is blockked by first fire prevention filling member and second fire prevention filling member, make holistic structure simplify, easy to assemble, practice thrift the cost. Simultaneously, when two pipeline reciprocal motion lead to first fire prevention filling member and second fire prevention filling member to break away from, through the junction of the first fire prevention filling member of third PLASTIC LAMINATED closing cap and second fire prevention filling member, prevent that the inside intensity of a fire of pipeline from influencing the waterproof tape subassembly via this junction.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of an embodiment of a pipe joint structure of a sinking pipe tunnel according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a partially enlarged view of B in fig. 1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Waterproof strip assembly	51a	Abdicating groove
30	First fireproof assembly	511	First mounting part
				31	Protection plate assembly	513	Shielding part
311	First fireproof plate	52	First barrier
				313	Second fireproof plate	53	Second fireproof filling part
33	Heat insulation piece	531	Second mounting part
				35	Flexible fire-proof belt	533	Abutting part
37	Auxiliary fire-proof belt	54	Second barrier
				50	Second fire-proof assembly	55	Third fire prevention plate
51	First fireproof filling member	60	Pipeline

The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.

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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a pipe joint structure of an immersed tube tunnel.

Referring to fig. 1 to 3, in the embodiment of the present invention, the immersed tube tunnel pipe joint structure includes at least two waterproof strip assemblies 10, first fireproof assemblies 30 and second fireproof assemblies 50, a waterproof strip assembly 10 and a first fireproof assembly 30 are connected between two adjacent pipes 60 at intervals and located on the top walls of the two pipes 60, a waterproof strip assembly 10 and a second fireproof assembly 50 are connected between two adjacent pipes 60 at intervals and located on the bottom walls of the two pipes 60, and the first fireproof assembly 30 and the second fireproof assembly 50 are located between the two waterproof strip assemblies 10, and the first fireproof assembly 30 includes:

the fender assembly 31, the fender assembly 31 comprises a first fire-proof plate 311 and a second fire-proof plate 313 which are arranged at intervals, one end of the first fire-proof plate 311 and one end of the second fire-proof plate 313 are connected with one pipeline 60, and the other end of the first fire-proof plate 311 and the other end of the second fire-proof plate 313 are movably connected with the other pipeline 60;

an insulation 33, the insulation 33 being located between the first fire shield 311 and the second fire shield 313; and

the flexible fireproof belt 35 is positioned between the first fireproof plate 311 and the second fireproof plate 313, one end of the flexible fireproof belt 35 is connected with the heat insulation piece 33, and the other end of the flexible fireproof belt 35 is connected with a pipeline 60;

the second fire prevention assembly 50 includes:

the first fireproof filling piece 51 is fixedly connected to the bottom wall of one pipeline 60, and extends towards the other pipeline 60;

a second fire-resistant packing 53, the second fire-resistant packing 53 being fixedly connected to the bottom wall of the other duct 60, the first fire-resistant packing 51 and the second fire-resistant packing 53 covering the waterproof tape assembly 10 when abutting against each other;

and the third fireproof plate 55 is fixedly connected to one of the first fireproof filling piece 51 or the second fireproof filling piece 53 and covers the joint of the first fireproof filling piece 51 and the second fireproof filling piece 53.

In the present invention, a waterproof tape assembly 10 is installed between the top walls of two adjacent pipes 60 to prevent external moisture from entering the pipes 60 from the upper sides of the two pipes 60. The first fire prevention assembly 30 is disposed below the flashing strip assembly 10 to prevent the fire inside the pipe 60 from affecting the flashing strip assembly 10 from the bottom up, thereby protecting the flashing strip assembly 10. The first fireproof assembly 30 is further arranged to be a first fireproof plate 311, a heat insulating piece 33 and a second fireproof plate 313, so that the fire in the pipeline 60 is blocked by the first fireproof plate 311, the heat insulating piece 33 is further arranged to prevent the first fireproof plate 311 from being too high in temperature and the air temperature of the part adjacent to the waterproof strip assembly 10 from being too high, and finally the second fireproof plate 313 is arranged to minimize the influence of the fire in the pipeline 60 on the waterproof strip assembly 10. Meanwhile, one end of the first fireproof plate 311 and one end of the second fireproof plate 313 are connected with one pipeline 60, the other end of the first fireproof plate 311 and the other end of the second fireproof plate 313 are movably connected with the other pipeline 60, when the two pipelines 60 are longitudinally displaced, the first fireproof plate 311 and the second fireproof plate 313 which are arranged in the way can meet the requirement of displacement, meanwhile, in order to prevent the temperature from being transmitted from the part, where the heat insulation piece 33 is not arranged, of the first fireproof plate 311 and the second fireproof plate 313, the flexible fireproof belt 35 is arranged at one end of the heat insulation piece 33, the flexible fireproof belt 35 can be stretched and folded, the transmission of the overheat temperature from the part is further prevented, and the fireproof capacity of the fireproof assembly is further improved.

And, to the fire prevention of the lateral wall junction under two pipelines 60, can adopt the fire resistive construction similar to the roof, of course, in order to simplify the structure, through setting up second fire prevention subassembly 50 as the first fire prevention packing 51 of connecting the pipeline 60 diapire and the second fire prevention packing 53 of connecting another pipeline 60 diapire, the two covers waterproof area subassembly 10 when mutual butt for the inside intensity of a fire of pipeline 60 is blockked by first fire prevention packing 51 and second fire prevention packing 53, make holistic structure simplify, easy to assemble, save the cost. Meanwhile, when the first fireproof filling member 51 and the second fireproof filling member 53 are separated due to the mutual movement of the two pipelines 60, the joint of the first fireproof filling member 51 and the second fireproof filling member 53 is covered by the third fireproof plate 55, so that the fire in the pipeline 60 is prevented from affecting the waterproof belt assembly 10 through the joint.

The first fireproof filling member 51 and the second fireproof filling member 53 may be concrete filling members, or filling members made of other fireproof materials. It will be appreciated that the fixed connection of the first and second fire prevention plates 311, 313 to the duct 60 may be by bolting the panels together, and the movable connection of the first and second fire prevention plates 311, 313 to the duct 60 may be by sliding the first and second fire prevention plates 311, 313 along the end of the duct 60, or by sliding sockets in the end of the duct 60 into which the ends of the first and second fire prevention plates 311, 313 are inserted for sliding movement. Of course, it is to be understood that the first and second flame retardant panels 311, 313 can be attached to the conduit 60 in other manners and are within the scope of this invention.

Of course, the upper end and the lower end of the pipeline are fireproof in the above way, and the left side and the right side of the pipeline can adopt the mutually overlapped fireproof way, for example, the left side and the right side of one pipeline form slots, and the left side and the right side of the other pipeline form bulges which are inserted into the slots; or, the left and right sides of a pipeline forms heavy platform, and the left and right sides of another pipeline forms the arch, and this arch and this heavy platform cooperation for the pipeline is at the removal in-process, and the left and right sides also can splice each other and seamless, thereby realizes preventing fires. Of course, fire protection similar to the upper end may be used on the left and right sides.

This flexible fire hose 35 adopts the asbestos, can adopt the mode of precompression to install when the installation, also under same height for the density of asbestos is bigger, makes two adjacent pipelines 50 at longitudinal displacement in-process, and this flexible fire hose 35 can vertically extend, satisfies longitudinal displacement's requirement, and this flexible fire hose 35 can play thermal-insulated fire prevention's effect at longitudinal extension in-process.

Referring to fig. 1 and 3 in combination, in an embodiment of the present application, the first fireproof filling member 51 includes a first mounting portion 511 and a shielding portion 513, the first mounting portion 511 is fixedly connected to an end of one pipe 60, the shielding portion 513 is connected to the first mounting portion 511 and extends toward the other pipe 60, and the shielding portion 513 is located above the waterproof tape assembly 10 and is configured to abut against the second fireproof filling member 53.

The first mounting portion 511 is fixedly connected to the end of the pipe 60, and the shielding portion 513 shields the waterproof tape assembly 10 and abuts against the second fireproof packing 53, thereby preventing fire. The first mounting portion 511 and the shielding portion 513 may be integrally cast.

Further, the shielding portion 513 is spaced apart from the waterproof tape assembly 10. That is, a certain draft gap is formed between the shielding portion 513 and the waterproof strip assembly 10, so as to facilitate the pouring and forming of the first fireproof filling member 51.

Further, a first blocking member 52 is disposed between the first installation portion 511 and the waterproof tape assembly 10. The first barrier member 52 serves to separate the first mounting portion 511 from the waterproof strip assembly 10 and may be made of concrete bricks or other refractory materials.

Referring to fig. 1 and 3, in an embodiment of the present application, the second fireproof filling member 53 includes a second mounting portion 531 and an abutting portion 533, the second mounting portion 531 is fixedly connected to an end of a pipe 60, and the abutting portion 533 is disposed on a surface of the second mounting portion 531 facing the shielding portion 513 and configured to abut against the shielding portion 513.

The second mounting portion 531 may be concrete cast and the abutment portion 533 may be made using a compression packing. By forming the second mounting portion 531 and the abutting portion 533 of different materials, the abutting portion 533 can be easily replaced after being damaged.

Further, similar to the structure of the first fire-resistant packing 51, a second barrier 54 is further provided between the abutting portion 533 and the waterproof tape assembly 10.

The second barrier 54, which serves to separate the abutment 533 from the waterproof strip assembly 10, may be made of concrete brick or other refractory material.

Referring to fig. 3 in combination, in an embodiment of the present application, the upper surface of the first fireproof filling member 51 is provided with a yielding groove 51a, the yielding groove 51a is disposed adjacent to the second fireproof filling member 53, the upper surface of the second fireproof filling member 53 is provided with a mounting groove corresponding to the yielding groove 51a, the yielding groove 51a is communicated with the mounting groove to form a sliding space, and the third fireproof plate 55 is fixedly disposed in the yielding groove 51a or the mounting groove and slides relative to the sliding space.

The third fire prevention plate 55 is arranged in the receding groove 51a or the mounting groove, so that the third fire prevention plate 55 can be conveniently mounted. Meanwhile, a sliding space is formed by the abdicating groove 51a and the installation groove, so that the displacement of the third fire prevention plate 55 can be facilitated. The third fire protection plate 55 may be a steel plate or a fire protection plate made of other materials.

Further, the third fire prevention plate 55 is fixed in the receding groove 51a or the installation groove by screws.

The third fire prevention plate 55 can be quickly mounted and dismounted by mounting the third fire prevention plate 55 through screws. The screw may be a self-tapping screw.

Further, the second fireproof component 50 further includes an adhesive sheet covering the notch arrangement of the receding groove 51a and the installation groove. The bonding sheet may be an oil-based bonding sheet, which may prevent foreign materials from falling into the receding groove 51a or the mounting groove.

Referring collectively to fig. 2, in one embodiment of the present application, the thickness H1 of the first flame retardant panel 311 has a range of values: h1 is more than or equal to 28.5mm and less than or equal to 36 mm.

The first fireproof plate 311 plays a role of preliminary fire prevention, and therefore, the thickness is not too thin, and if the thickness is too thin, the purpose of fire prevention cannot be achieved, and the thickness is set to be more than or equal to 28.5mm, so that the purpose of fire prevention can be achieved. Of course, the thickness of the first flame retardant panel 311 should not be too thick, which would interfere with the overall assembly of the duct 60, and therefore the thickness of the first flame retardant panel 311 is set to 36mm or less.

Further, in order to facilitate transportation and assembly of the first fire-proof plate 311, the first fire-proof plate 311 includes three layers of fire-proof composite plates arranged in a stacked manner, and the thickness range of each fire-proof composite plate is as follows: 9.5mm to 12 mm.

The whole thickness of first PLASTIC LAMINATED 311 needs to satisfy foretell demand, consequently, if this first PLASTIC LAMINATED 311 sets up to the board of monoblock, and is comparatively inconvenient at the in-process of transportation and assembly, consequently, adopts the fire prevention composite sheet of the range upon range of setting of three-layer, can conveniently transport and assemble. Of course, the thickness of the fire-resistant composite board of each layer is from 9.5mm to 12mm so that the overall thickness meets the above requirements.

The three-layer fireproof composite board can be assembled in a self-tapping screw mode, and also can be assembled in other modes, and the three-layer fireproof composite board is within the protection range of the application.

In order to achieve a better fire protection effect, the following settings can be adopted: in the three-layer fireproof composite board, the thickness of the steel plate from bottom to top is gradually reduced, and the integral thickness of the three is still required to be more than or equal to 28.5mm and less than or equal to H1 and less than or equal to 36 mm. Because, the steel sheet thickness that is located the below is thick enough, when producing great intensity of a fire, the steel sheet that is located the below plays the resistance of first layer, can not produce deformation because of the intensity of a fire is too big.

In conjunction with the above, the second flame retardant panel 313 is arranged as follows: the thickness of the second flame retardant panel 313H2 has a range of values: h2 is more than or equal to 28.5mm and less than or equal to 36 mm.

The second fireproof plate 313 plays a role of final heat insulation, so the thickness is also not too thin, and if the thickness is too thin, the purpose of temperature insulation can not be achieved, and the thickness is set to be more than or equal to 28.5mm, so the purpose of temperature insulation can be achieved. Of course, the thickness of the second flame retardant panel 313 should not be too thick, which could interfere with the overall assembly of the duct 60, and therefore the thickness of the second flame retardant panel 313 is set to 36mm or less.

Further, also to facilitate shipping and assembly of the second flame retardant panel 313, the second flame retardant panel 313 includes three layers of stacked flame retardant composite panels, each having a thickness in the range of: 9.5mm to 12 mm.

Also, in order to achieve a better heat insulation effect, the following arrangement may be adopted: in the three-layer fireproof composite board, the thickness of the steel plate from bottom to top is gradually reduced, and the integral thickness of the three is still required to be more than or equal to 28.5mm and less than or equal to H1 and less than or equal to 36 mm. Because the thickness of the steel plate below is thick enough, when higher temperature is generated, the steel plate below can resist the first layer, and deformation caused by overhigh temperature can be avoided.

The fireproof composite board can be a composite steel plate, the inner layer is a cement core layer doped with fibers, and the outer side is a 0.5mm thick perforated galvanized steel plate.

In one embodiment of the present application, the thermal insulation 33 is asbestos. Asbestos, also known as "asbestos fibers", is a generic term for certain silicate minerals that can be broken down into filaments rich in elastic fibers. The chemical formula is as follows: 3 MgO.2 SiO₂·2H₂O, is fibrous, green-yellow or white, white when split into wadding, silky luster, fiber rich in elasticity, and asbestos is a poor conductor of heat and electricity with acid, alkali and heat resistance. Therefore, the heat insulation member 33 of the present application is made of asbestos, and can better insulate heat and prevent fire.

Further, the thickness H3 of the thermal insulation 33 ranges from: h3 is not less than 120mm and not more than 150 mm. Similarly, the thickness of the heat insulation member 33 should not be too thin, and if the thickness is too thin, the purpose of insulating temperature cannot be achieved, and the thickness is set to be greater than or equal to 120mm, so that the purpose of insulating temperature can be achieved. Of course, the thickness of the heat insulating member 33 should not be too large, which may affect the overall assembly of the duct 60, and therefore, the thickness of the heat insulating member 33 is set to 150mm or less.

Referring to fig. 1 and 2 in combination, in one embodiment of the present application, the end of the thermal shield 33 facing away from the flexible fire strip 35 is provided with an auxiliary fire strip 37, and the auxiliary fire strip 37 is connected to the thermal shield 33 at one end and to a duct 60 at the other end.

That is, the thermal insulation member 33 is installed with both ends thereof not directly connected to the ends of the duct 60, one end being connected by the flexible fire hose 35, and the other end being connected by the auxiliary fire hose 37, the auxiliary fire hose 37 functioning similarly to the flexible fire hose 35 to prevent heat from passing therethrough.

In an embodiment of the present application, at the upper end of the pipes 60, a connection section is protruded from the end surface of each pipe 60, the waterproof strip assembly 10 connects two adjacent connection sections, the waterproof strip assembly 10, the two connection sections, the end portions of two adjacent pipes 60 and the first fireproof plate 311 enclose a fireproof space, and the second fireproof plate 313 and the thermal insulation member 33 are located in the fireproof space.

The fire-resistant space thus provided facilitates assembly of both the fire-resistant assembly and the water-resistant strip assembly 10, and also provides a compact overall structure.

Further, an insulation 33 is mounted to a surface of the first flame retardant panel 311 facing the second flame retardant panel 313. When the fireproof component is assembled, the first fireproof plate 311 is assembled, then the heat insulation piece 33 is assembled on the surface of the first fireproof plate 311, then the flexible fireproof strip 35 is assembled, and finally the second fireproof plate 313 is assembled, so that the whole fireproof component can be completely assembled. The upper and lower surfaces of the heat insulator 33 may abut against the upper surface of the first flame retardant plate 311 and the lower surface of the second flame retardant plate 313, respectively, but may be mounted only on the upper surface of the first flame retardant plate 311 similarly to the illustration of the present application.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a immersed tube tunnel tube coupling joint design, its characterized in that includes two at least waterproof band subassemblies, first fire prevention subassembly and second fire prevention subassembly, one waterproof band subassembly with first fire prevention subassembly interval is connected between two adjacent pipelines, and is located two the roof of pipeline, one waterproof band subassembly with second fire prevention subassembly interval is connected between two adjacent pipelines, and is located two the diapire of pipeline, first fire prevention subassembly with second fire prevention subassembly is located two between the waterproof band subassembly, first fire prevention subassembly includes:

an insulation between the first and second fire resistant panels; and

the flexible fireproof belt is positioned between the first fireproof plate and the second fireproof plate, one end of the flexible fireproof belt is connected with the heat insulation piece, the other end of the flexible fireproof belt is connected with a pipeline, and the flexible fireproof belt is made of asbestos;

the second fire prevention assembly includes:

2. The immersed tube tunnel pipe joint structure of claim 1, wherein the first fireproof filling member comprises a first mounting portion and a shielding portion, the first mounting portion is fixedly connected with an end portion of one of the pipes, the shielding portion is connected to the first mounting portion and extends toward the other pipe, and the shielding portion is located above the waterproof belt assembly and is used for abutting against the second fireproof filling member.

3. The immersed tunnel pipe joint structure according to claim 2, wherein the shielding portion is spaced apart from the waterproof tape assembly.

4. The immersed tube tunnel joint structure of claim 3, wherein a first barrier is further provided between the first mounting portion and the waterproof tape assembly.

5. The immersed tube tunnel pipe joint structure of claim 2, wherein the second fireproof filling member comprises a second installation portion and an abutting portion, the second installation portion is fixedly connected with an end portion of the pipe, and the abutting portion is disposed on a surface of the second installation portion facing the shielding portion and is used for abutting against the shielding portion.

6. The immersed tunnel pipe joint structure of claim 5, wherein a second barrier is further provided between the abutting portion and the waterproof strip assembly.

7. The immersed tube tunnel coupling joint structure of any one of claims 1 to 6, wherein the upper surface of the first fireproof filling member is provided with a yielding groove, the yielding groove is disposed adjacent to the second fireproof filling member, the upper surface of the second fireproof filling member is provided with a mounting groove corresponding to the yielding groove, the yielding groove and the mounting groove are communicated to form a sliding space, and the third fireproof plate is fixedly disposed in the yielding groove or the mounting groove and slides relative to the sliding space.

8. The immersed tube tunnel coupling structure of claim 7, wherein the third fire prevention plate is fixed in the receding groove or the installation groove by a screw.

9. The immersed tunnel pipe joint construction of claim 7, wherein said second fire protection assembly further comprises: the bonding sheet covers the abdicating groove and the notch of the mounting groove.

10. The immersed tunnel pipe joint structure of claim 7, wherein the thickness of the first fireproof plate H1 is in the range of: h1 is more than or equal to 28.5mm and less than or equal to 36 mm;