CN115434367A

CN115434367A - Seabed tunnel modularization laying device

Info

Publication number: CN115434367A
Application number: CN202211130768.1A
Authority: CN
Inventors: 路懿; 路扬; 丁玲; 常泽锋
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2022-09-16
Filing date: 2022-09-16
Publication date: 2022-12-06
Anticipated expiration: 2042-09-16
Also published as: CN115434367B

Abstract

The invention relates to a modular laying device for a submarine tunnel, which comprises the submarine tunnel, a propelling machine and a sealing head, wherein the submarine tunnel comprises a plurality of supports arranged along the submarine tunnel, a plurality of tunnels, sealing rings arranged between two adjacent tunnels and a sealing connecting assembly for connecting the two adjacent tunnels, the supports are uniformly distributed and fixedly arranged on a surface of the submarine bed, the tunnels are arranged on the supports, the sealing rings are arranged between the two adjacent tunnels, the two adjacent tunnels are connected through the sealing connecting assemblies, the propelling machine and the sealing head are arranged in the tunnels, the sealing head is arranged at the front end of the propelling machine, and the propelling machine is alternately locked and released in the tunnels through a gear-rack mechanism. The submarine tunnel is constructed in a modular mode, manufacturing and installation are convenient, the sealing head can be driven to move forwards by driving the gear screw mechanism to rotate forwards synchronously when the propelling machine is locked, and the sealing head can drive the propelling machine to move forwards by driving the gear screw mechanism to rotate backwards synchronously when the propelling machine is unlocked.

Description

Seabed tunnel modularization laying device

Technical Field

The invention belongs to the technical field of traffic pipeline engineering, and particularly relates to a modular laying device for a submarine tunnel.

Background

The submarine tunnel is a traffic pipeline engineering constructed under the sea floor at straits, bays, estuaries, etc. to communicate traffic between land areas. The submarine tunnel does not obstruct the navigation of the water ship, does not prevent the lateral flow of seawater above and below the tunnel, and is not influenced by weather conditions such as strong wind, strong fog and the like, so the submarine tunnel is a rapid, energy-saving and convenient traffic and transportation channel for vehicles to pass through straits, bay and estuary. The famous submarine tunnels built in the world at present comprise Japanese green letter tunnels, english-method strait tunnels, hongzhu-Australian bridge tunnels and the like.

Usually, a large machine is used for completing the construction process of the submarine tunnel, and seawater is also isolated, so that the construction of the submarine tunnel is always a great challenge in the field of world building engineering. Subsea tunnels are generally divided into two types, sub-subsea strata and subsea surfaces. The existing method for laying the submarine tunnel comprises the following steps: (1) The drilling and blasting method is characterized in that blasting is carried out by punching and loading explosives, water easily seeps into a tunnel in the process of tunnel excavation, an engineer needs to adopt a waterproof remediation method, the whole tunnel is cast in situ, the seabed earthwork engineering amount is large, and the method is limited by seabed geographic structures. (2) The shield method is to push out the soil layer under the seabed stratum by a large shield machine, send out the soil by using a transport machine, and form a tunnel by splicing. Because the tunnel is formed by splicing the segments, the requirement on the segments is particularly high, and absolute waterproof is required. (3) The immersed tube method is used for constructing the Hongzhu Australia bridge tunnel. In the process of laying the tunnel, seawater is prevented from being poured into the tunnel, the seawater can directly enter the tunnel to carry out tunnel internal construction when a section of tunnel prefabricated member is laid, the laying construction is carried out synchronously, the process is complex, and the methods have respective defects. Chinese patent CN112341013B discloses cement for grouting of a submarine tunnel and a preparation method thereof, and the cement is used for improving the compressive strength of the submarine tunnel; chinese patent CN110241858B discloses a sealing technology for a submarine tunnel junction, which drives workers on an operation platform to be more stably close to a protective net to be revised through a transmission structure; chinese patent CN109973125B discloses a submarine tunnel laying device, which uses a track type immersed tube tunnel, wherein the track fixes the running track of the device, so as to prevent the device from shifting due to submarine current, and the installation device carrying the immersed tube to be installed can run on the immersed tube which is installed and not buried. The invention provides a modular laying device of a submarine tunnel, which is used for the modular laying of the submarine tunnel and is an effective means for overcoming the difficulty in the conventional submarine tunnel engineering.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a submarine tunnel modular laying device, which aims to modularize a submarine tunnel built, a large number of supports and each section of tunnel can be moved to shore land for casting and manufacturing, the requirements of high strength and accurate structure of the supports and the tunnel are easy to achieve, meanwhile, the whole structure of the tunnel is simple and compact, the space is saved, and the sealing is safe and reliable.

The invention adopts the technical scheme that the submarine tunnel modular laying device comprises a submarine tunnel, a propelling machine and a sealing head, wherein the submarine tunnel comprises a plurality of supports arranged along the submarine tunnel, a plurality of tunnels with the same structure, a sealing ring arranged between every two adjacent tunnels and a sealing connecting assembly for connecting every two adjacent tunnels, the supports are uniformly distributed on a seabed surface, the bottoms of the supports are fixedly connected with the seabed surface, the tunnels are thick-wall tube bodies with long circular cross sections, the tunnels are arranged on the supports, the outer side surface of a first end of each tunnel is provided with a frustum section along the axial direction of the tunnel, the outer side surface of a second end of each tunnel is provided with a boss and a mounting positioning groove section along the axial direction of the tunnel, the mounting positioning groove sections are positioned on the inner sides of the bosses, the inner side surfaces of the first end and the second end of each tunnel are symmetrically provided with a small-diameter driving channel, a middle-diameter connecting section and a large-diameter sealing part along the axial direction of the tunnel, the small-diameter driving channel, the middle-diameter connecting section and the large-diameter sealing part are sequentially arranged along the radial direction of the tunnel, the mounting positioning grooves of the tunnel, the front sections of the tunnels are inserted into the mounting positioning grooves of the tunnels, the tunnel, the sealing rings are radially connected with the sealing connecting assemblies, the sealing rings, and the sealing rings and the sealing assemblies are respectively connected with the sealing rings through the sealing rings, and the sealing rings, the sealing rings are respectively, and the sealing rings and the sealing connecting assemblies and the sealing rings are tightly connected with the sealing rings; the sealing device is characterized in that the propelling machine and the sealing head are arranged in the tunnel, the sealing head is arranged at the front end of the propelling machine, the propelling machine comprises a frame, a rack-and-pinion mechanism, a gear screw mechanism and a guide wheel, the guide wheel is symmetrically arranged on the side face of a rectangular sleeve in the frame, the guide wheel is in rolling contact with the inner wall of the tunnel, the rack-and-pinion mechanism is arranged in the frame, the propelling machine can support the propelling machine in the tunnel through driving the rack rod in the rack-and-pinion mechanism to move linearly, the gear screw mechanism is arranged at the front end of the frame, one end of a screw rod in the gear screw mechanism is in threaded connection with a screw nut on a frame in the sealing head, the propelling machine drives the screw rod in the gear screw mechanism to rotate through driving, the sealing head can drive the sealing head to move linearly along the tunnel, and is arranged on each sealing face of a flexible sealing ring outside the frame in the sealing head to contact with the inner wall of the tunnel.

Preferably, the support and the tunnel are both formed by pouring a steel reinforcement framework and concrete, and the support is in a rectangular upright column structure.

Further, the sealing ring comprises a T-shaped flexible body formed by a radial ring and an axial ring, zigzag sealing protruding portions are symmetrically and uniformly distributed on the two sides of the radial ring and on the two sides of the upper end face of the axial ring respectively, one end of the sealing ring is fixed to the side wall of the large-diameter sealing portion in the front section tunnel through screws, the sealing protruding portions of the first side face of the radial ring and the sealing protruding portions of the upper end face of the first side of the axial ring in the sealing ring are in pressing contact with the end face of the positioning groove section in the front section tunnel and the side wall of the large-diameter sealing portion in the front section tunnel respectively, when the frustum section of the rear section tunnel is inserted into the positioning groove section in the front section tunnel, the sealing connecting assembly is used for connecting the front section tunnel and the rear section tunnel, and the sealing protruding portions of the second side face of the radial ring and the upper end face of the axial ring in the sealing ring are in pressing contact with the end face of the second side of the frustum section tunnel and the side wall of the large-diameter sealing portion in the rear section tunnel respectively.

Further, sealing connection subassembly equipartition encircles and locates the circumferencial direction of two adjacent tunnel junctions, just sealing connection subassembly includes connecting plate, spring and clamp plate, the both ends of connecting plate all are equipped with the screw hole, just the top of connecting plate is equipped with the clamp plate, be equipped with between connecting plate and the clamp plate the spring, just the first end of spring is supported on the connecting plate, the second end of spring supports on the clamp plate, clamp plate and connecting plate are located respectively big footpath sealing and the well footpath linkage segment in anterior segment tunnel and the back end tunnel, just the up end of clamp plate compresses tightly the bottom of axial ring in the seal ring, the connecting plate both ends respectively through the bolt with anterior segment tunnel and back end tunnel are connected, just the medial surface of connecting plate with each side of the path of a vehicle passageway in the tunnel is the coplane all.

Preferably, the rack and pinion mechanism includes first engine, pinion and four groups of rack bars, first engine is located on the back riser of frame, just the output shaft of first engine passes back riser with the pinion is connected, be equipped with around the pinion four groups of rack bars, four groups of rack bars all locate on the rectangle sleeve of frame, just the pole portion on the rack bar with radial through-hole on the rectangle sleeve removes vice and connects, the rack on every group rack bar all with the pinion meshing transmission, just four groups of rack bars are perpendicular to respectively the inner wall in tunnel, the one end of every group rack bar all is equipped with the support disc, just first engine passes through rack and pinion meshing transmission can drive rack bar rectilinear movement, make the support disc with the inner wall in tunnel contacts, will the propeller supports in the tunnel.

Preferably, the gear screw mechanism comprises four groups of gear screws, a second engine and a gearwheel, the second engine is arranged on a front vertical plate of the rack, an output shaft of the second engine penetrates through the front vertical plate to be connected with the gearwheel, the four groups of gear screws are arranged on the periphery of the gearwheel, gears on the gear screws are all in meshing transmission with the gearwheel, one end of a screw rod on the gear screws is connected with the gearwheel, the screw rod penetrates through a circumferential through hole in the front end of the front vertical plate and is supported in the circumferential through hole through a bearing, and the other end of the screw rod is in threaded connection with a nut on a frame in the sealing head.

Further, the sealing head comprises a frame, a flexible sealing ring, four nuts and a drainage pump, the frame is of a shell structure formed by a front vertical plate, a rear vertical plate and a shaft sleeve, the flexible sealing ring is arranged on the shaft sleeve in a surrounding mode, each seal of the flexible sealing ring is in contact with the inner wall of the tunnel, the four nuts are uniformly distributed on the rear vertical plate, the drainage pump is arranged between the front vertical plate and the rear vertical plate, a water suction pipe of the drainage pump penetrates through a through hole in the lower end of the rear vertical plate and is communicated with an operation area of the submarine tunnel, a drainage pipe of the drainage pump penetrates through a through hole in the lower end of the front vertical plate and is communicated with a non-operation area of the submarine tunnel, and the drainage pump can discharge water in the operation area of the submarine tunnel to the non-operation area of the submarine tunnel.

The invention has the characteristics and beneficial effects that:

1. the modular submarine tunnel laying device provided by the invention has the advantages that the submarine tunnel can be constructed in a modular manner, a large number of supports and each section of tunnel are identical in structure and can be moved to land on the shore for casting, the requirements of high strength and accurate structure of the supports and the tunnel are easily met, meanwhile, the tunnel is simple and compact in overall structure, space is saved, sealing is safe and reliable, the constructed submarine tunnel does not obstruct navigation of a water ship, seawater flow is not prevented from transversely flowing above and below the tunnel, and the influence of weather conditions such as strong wind, strong fog and the like is avoided.

2. The invention provides a submarine tunnel modular laying device, which can be used for sleeving and fixing a sealing ring at one end of each tunnel in advance, after a rear tunnel is inserted into a front tunnel, two adjacent tunnels are fixedly connected through a sealing connecting assembly, meanwhile, each sealing surface of the sealing ring is provided with a sawtooth-shaped sealing protruding part, and after the connection of the two adjacent tunnels is completed, the sealing protruding parts of each sealing surface in the sealing ring are in extrusion contact with the end surfaces and the side walls of the front tunnel and the rear tunnel, so that the sealing process is simple, and the sealing performance of the tunnel connection part can be improved.

3. According to the modular laying device for the submarine tunnel, the propelling machine and the sealing head are arranged in the tunnel, the propelling machine can be locked and supported in the tunnel alternatively by driving the gear screw mechanism arranged on the propelling machine, and the propelling machine and the sealing head can move forwards in the tunnel alternatively and reciprocally by driving the gear screw mechanism arranged on the propelling machine.

4. According to the modular laying device for the submarine tunnel, the flexible sealing ring on the sealing head is in contact with the inner wall of the tunnel, so that the submarine tunnel is divided into the operating area and the non-operating area, and meanwhile, water in the operating area in the submarine tunnel can be discharged to the non-operating area of the submarine tunnel through the drainage pump arranged at the sealing head, so that construction and construction of operators are facilitated.

Drawings

Fig. 1 is a sectional view of a modular laying apparatus of a submarine tunnel according to the present invention;

FIG. 2 is a cross-sectional view of a tunnel of the present invention;

FIG. 3 is a cross-sectional view of the seal ring and seal connection assembly of the present invention;

fig. 4 is an axial sectional view of the modular laying apparatus of the submarine tunnel according to the present invention.

The main reference numbers:

a support 1; a tunnel 2; a frustum section 2-1; 2-2 parts of a boss; installing the positioning groove section 2-3; 2-4 of small-diameter traffic lane; 2-5 of a medium diameter connecting section; 2-6 of large-diameter sealing part; the sealing connection assembly 3 is connected with the connecting plate 3-1; 3-2 of a spring; 3-3 parts of a sealing ring; radial ring 3-3-1; axial ring 3-3-2; 3-4 of a pressing plate; a pusher 4; a frame 4-1; a first engine 4-2; pinion 4-3; four groups of rack rods 4-4; 4-5 parts of a gear lead screw; 4-5-1 of a silk lever; 4-5-2 parts of a gear; a second engine 4-6; 4-7 of a bull gear; 4-8 parts of a guide wheel; a sealing head 5; a frame 5-1; a flexible sealing ring 5-2; 5-3 of a screw nut; and 5-4, draining a pump.

Detailed Description

The technical contents, structural features, attained objects and effects of the present invention are explained in detail below with reference to the accompanying drawings.

The invention provides a modular laying device for a submarine tunnel, which comprises a submarine tunnel, a pusher 4 and a sealing head 5, wherein the submarine tunnel comprises a plurality of supports 1 arranged along the submarine tunnel, a plurality of tunnels 2 with the same structure, sealing rings 3-3 arranged between every two adjacent tunnels 2 and a sealing connecting assembly 3 for connecting every two adjacent tunnels 2, the supports 1 are rectangular columns formed by pouring a steel bar framework and concrete, the supports 1 are uniformly distributed on a surface of the submarine bed, the bottoms of the supports 1 are poured and fixed on the surface of the submarine bed, and the top of each support 1 is provided with a positioning support surface and a connecting hole.

As shown in figure 2, the tunnel 2 is a thick-walled tube body with an oblong cross section formed by pouring a steel reinforcement framework and concrete, the tunnel 2 is arranged on a support 1, the outer side surface of the first end of the tunnel 2 is provided with a frustum section 2-1 along the axis direction, the outer side surface of the second end of the tunnel 2 is provided with a boss 2-2 and a positioning groove section 2-3 along the axis direction, the positioning groove section 2-3 is arranged on the inner side of the boss 2-2, the lower end of the boss 2-2 is provided with a mounting table and a connecting hole, the mounting table of the boss 2-2 in the tunnel 2 is placed on a positioning support surface at the top of the support 1, the tunnel 2 is fixed on the support 1 through bolts respectively penetrating through the connecting hole at the top of the support 1 and the connecting hole on the tunnel 2, the inner side surfaces of the first end and the second end of the tunnel 2 are symmetrically provided with a small-diameter running passage 2-4, a middle-diameter connecting section 2-5 and a large-diameter sealing part 2, the running passage 2-4, the middle-diameter connecting section 2 and the large-diameter sealing part 2 are arranged in a step shape along the radial direction of the tunnel 2, and the front section of the positioning groove 2-2 is inserted into the positioning pin of the positioning groove section 2-2.

As shown in fig. 3, the sealing ring 3-3 is disposed between two adjacent tunnels 2, the sealing ring 3-3 is a T-shaped flexible body formed by the radial ring 3-3-1 and the axial ring 3-3-2, and the side surfaces of both sides of the radial ring 3-3-1 and both sides of the upper end surface of the axial ring 3-3-2 are symmetrically and uniformly provided with sawtooth-shaped sealing protrusions, respectively, one end of the sealing ring 3-3 is fixed on the side wall of the large-diameter sealing part 2-6 in the front-section tunnel 2 by screws, and the sealing protrusion on the first side surface of the radial ring 3-3-1 and the sealing protrusion on the upper end surface of the first side of the axial ring 3-3-2 in the sealing ring 3-3 are respectively in pressing contact with the end surface of the mounting positioning groove section 2-3 in the front-section tunnel 2 and the side wall of the large-diameter sealing part 2-6 in the front-section tunnel 2, when the cone section 2-1 of the rear-section tunnel 2 is inserted into the mounting positioning groove section 2-3 of the front-section tunnel 2, and the sealing ring 2-3 is connected with the rear-section tunnel 2 by the sealing connection assembly 3, and the sealing ring 3 is connected with the front-section 2 and the front-2 and the rear-2.

As shown in fig. 3, two adjacent tunnels 2 are connected by a sealing connection assembly 3, the sealing connection assembly 3 can compress a sealing ring 3-3, and each sealing surface of the sealing ring 3-3 is respectively in contact with the end surface and the side wall of the front-stage tunnel 2 and the rear-stage tunnel 2. The sealing connection assemblies 3 are uniformly arranged in the circumferential direction of the joint of every two adjacent tunnels 2 in a surrounding mode, each sealing connection assembly 3 comprises a connection plate 3-1, a spring 3-2 and a pressing plate 3-4, threaded holes are formed in two ends of each connection plate 3-1, the pressing plates 3-4 are arranged above the connection plates 3-1, the springs 3-2 are arranged between the connection plates 3-1 and the pressing plates 3-4, first ends of the springs 3-2 abut against the connection plates 3-1, second ends of the springs 3-2 abut against the pressing plates 3-4, the pressing plates 3-4 and the connection plates 3-1 are respectively arranged on large-diameter sealing portions 2-6 and middle-diameter connection sections 2-5 in the front-section tunnels 2 and the rear-section tunnels 2, the upper end faces of the pressing plates 3-4 press the bottoms of the axial rings 3-3-2 in the sealing rings 3-3, two ends of the connection plates 3-1 are respectively connected with the front-section tunnels 2 and the rear-section tunnels 2 through bolts, and the inner side faces of the middle-diameter passages 2 and the connecting plates 3-1 are coplanar with the side faces of the middle-diameter passages 2 and the middle-4 in the tunnels 2.

As shown in fig. 1 and 4, the propelling machine 4 is disposed in the tunnel 2, and the propelling machine 4 includes a rack 4-1, a rack-and-pinion mechanism, a gear-and-screw mechanism and guide wheels 4-8, the rack 4-1 is a housing structure composed of a front vertical plate, a rear vertical plate and a rectangular sleeve, the guide wheels 4-8 are symmetrically disposed on the side of the rectangular sleeve in the rack 4-1, and the guide wheels 4-8 are in rolling contact with the inner wall of the tunnel 2, the rack-and-pinion mechanism is disposed on the rack 4-1, and the propelling machine 4 can support the propelling machine 4 in the tunnel 2 by driving the rack bar 4-4 in the rack-and-pinion mechanism to move linearly, the gear-and-screw mechanism is disposed at the front end of the rack 4-1, and one end of the screw bar 4-5-1 in the gear-and-screw mechanism is in threaded connection with the screw 5-3 on the frame 5-1 in the sealing head 5, and the propelling machine 4 rotates by driving the screw bar 4-5-1 in the driving gear-screw mechanism to drive the sealing head 5 to move linearly, and the sealing head 5 is disposed at the outer side of the sealing ring 5, and is in contact with the sealing surface of each sealing surface of the sealing surface 2 of the tunnel 2.

In a preferred mode, the rack and pinion mechanism comprises a first engine 4-2, a pinion 4-3 and four groups of rack rods 4-4, the first engine 4-2 is arranged on a rear vertical plate of the rack 4-1, an output shaft of the first engine 4-2 penetrates through the rear vertical plate to be connected with the pinion 4-3, four groups of rack rods 4-4 are arranged around the pinion 4-3, four groups of rack rods 4-4 are arranged on a rectangular sleeve of the rack 4-1, a round rod part on each rack rod 4-4 is connected with a radial through hole moving pair on the rectangular sleeve, a rack on each group of rack rods 4-4 is in meshing transmission with the pinion 4-3, the four groups of rack rods 4-4 are respectively perpendicular to the inner wall of the tunnel 2, a supporting disc is arranged at one end of each group of rack rods 4-4, and the first engine 4-2 can drive the rack rods 4-4 to move linearly through the rack and pinion meshing transmission, so that the supporting discs are in contact with the inner wall of the tunnel 2 to support the propulsion machine 4 in the tunnel 2.

In a preferable mode, the gear screw mechanism comprises four groups of gear screws 4-5, a second engine 4-6 and a large gear 4-7, the second engine 4-6 is arranged on a front vertical plate of a rack 4-1, an output shaft of the second engine 4-6 penetrates through the front vertical plate to be connected with the large gear 4-7, the four groups of gear screws 4-5 are arranged on the periphery of the large gear 4-7, gears 4-5-2 on the gear screws 4-5 are in meshing transmission with the large gear 4-7, one end of a screw rod 4-5-1 on the gear screw 4-5 is connected with the gear 4-5-2, the screw rod 4-5-1 penetrates through a circumferential through hole in the front end of the front vertical plate and is supported in the circumferential through hole through a bearing, and the other end of the screw rod 4-5-1 is in threaded connection with a screw nut 5-3 on a middle frame 5-1 of a sealing head 5.

As shown in fig. 1 and 4, the sealing heads 5 are all arranged in the tunnel 2, the sealing head 5 is arranged at the front end of the propelling machine 4, the sealing head 5 comprises a frame 5-1, a flexible sealing ring 5-2, four nuts 5-3 and a drainage pump 5-4, the frame 5-1 is a shell structure formed by a front vertical plate, a rear vertical plate and a shaft sleeve, the flexible sealing ring 5-2 is arranged on the shaft sleeve in a surrounding manner, each seal of the flexible sealing ring 5-2 is in contact with the inner wall of the tunnel 2, the four nuts 5-3 are uniformly distributed on the rear vertical plate, the drainage pump 5-4 is arranged between the front vertical plate and the rear vertical plate, a water suction pipe of the drainage pump 5-4 penetrates through a through hole at the lower end of the rear vertical plate and is communicated with an operating area of the submarine tunnel, a drainage pipe of the drainage pump 5-4 penetrates through a through hole at the lower end of the front vertical plate and is communicated with a non-operating area of the submarine tunnel, and the drainage pump 5-4 can drain water in the operating area in the submarine tunnel to the non-operating area of the submarine tunnel.

In the advancing process of the propelling machine 4 and the sealing head 5 in the tunnel 2, when the first engine 4-2 drives the pinion 4-3 to rotate forwards, the pinion 4-3 drives four groups of rack rods 4-4 to radially extend out through gear and rack meshing, the supporting disc at one end of each rack rod 4-4 presses the inner wall of the tunnel 2 to lock and support the propelling machine 4 in the tunnel 2, the second engine 4-6 rotates forwards at the moment, the gear wheels 4-7 drive four groups of gear screws 4-5 to rotate forwards synchronously, and the sealing head 5 is pushed to move forwards through four nuts 5-3 on the sealing head 5. When the first engine 4-2 drives the pinion 4-3 to rotate reversely, the pinion 4-3 drives four groups of rack rods 4-4 to retract radially through the meshing of a rack and a pinion, at the moment, a supporting disk at one end of each rack rod 4-4 is separated from the inner wall of the tunnel 2, the guide wheels 4-8 in the tunnel 2 support the propeller 4, at the moment, the second engine 4-6 rotates reversely, the gear screws 4-5 of the four groups are driven to rotate reversely synchronously through the large gears 4-7, and as the friction resistance between the sealing ring groups 5-2 of the sealing head 5 and the inner wall of the tunnel 2 is larger than the support friction resistance of the guide wheels 4-8 on the propeller 4 in the tunnel 2, the sealing head 5 pulls the propeller 4 to move forwards through the nuts 5-3.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A modular laying device for a submarine tunnel is characterized by comprising the submarine tunnel, a propelling machine and a sealing head,

the submarine tunnel comprises a plurality of supports arranged along the submarine tunnel, a plurality of tunnels with the same structure, sealing rings arranged between every two adjacent tunnels and a sealing connection assembly for connecting every two adjacent tunnels, the supports are uniformly distributed on a seabed surface, the bottoms of the supports are fixedly connected with the seabed surface, the tunnels are thick-walled tube bodies with long circular cross sections, the tunnels are arranged on the supports, the outer side surface of the first end of each tunnel is provided with a frustum section along the axis direction of the tunnel, the outer side surface of the second end of each tunnel is provided with a boss and an installation positioning groove section along the axis direction of the tunnel, the installation positioning groove sections are positioned on the inner sides of the bosses, the inner side surfaces of the first end and the second end of each tunnel are symmetrically provided with a small-diameter driving channel, a middle-diameter connecting section and a large-diameter sealing part along the axial direction of the tunnel, the small-diameter driving channel, the middle-diameter connecting section and the large-diameter sealing part are sequentially arranged in a step shape along the radial direction of the tunnel, the frustum sections of the rear section of each tunnel are inserted into the installation positioning groove sections of the front section of each tunnel and are radially positioned and connected with each sealing ring through the positioning pins, the sealing connection assembly, and the sealing rings are respectively compressed and the sealing surfaces of the sealing rings and the sealing surfaces of the tunnel are respectively connected between the tunnel;

the tunnel sealing device is characterized in that the propelling machine and the sealing head are arranged in the tunnel, the sealing head is arranged at the front end of the propelling machine, the propelling machine comprises a rack, a rack-and-pinion mechanism, a gear screw mechanism and guide wheels, the guide wheels are symmetrically arranged on the side face of a rectangular sleeve in the rack and are in rolling contact with the inner wall of the tunnel, the rack-and-pinion mechanism is arranged on the rack and can support the propelling machine in the tunnel by driving the rack rod in the rack-and-pinion mechanism to move linearly, the gear screw mechanism is arranged at the front end of the rack, one end of a screw rod in the gear screw mechanism is in threaded connection with a screw nut on a frame in the sealing head, and the propelling machine can drive the sealing head to move linearly along the tunnel by driving the screw rod in the gear screw mechanism to rotate and is arranged on each sealing surface of a flexible sealing ring outside the frame in the sealing head to be in contact with the inner wall of the tunnel.

2. The modular undersea tunnel laying apparatus according to claim 1, wherein said support and tunnel are each constructed by a steel reinforcement cage and concrete casting, and said support is in a rectangular column structure.

3. The modular submarine tunnel laying device according to claim 1, wherein the sealing ring is a T-shaped flexible body formed by a radial ring and an axial ring, the two sides of the radial ring and the two sides of the upper end face of the axial ring are symmetrically and uniformly provided with sawtooth-shaped sealing protrusions, one end of the sealing ring is fixed on the side wall of the large-diameter sealing portion in the front tunnel through screws, the sealing protrusion on the first side face of the radial ring and the sealing protrusion on the upper end face of the first side of the axial ring in the sealing ring respectively press-contact the end face of the installation positioning groove section in the front tunnel and the side wall of the large-diameter sealing portion in the front tunnel, and when the frustum section of the rear tunnel is inserted into the installation positioning groove section of the front tunnel and the rear tunnel are connected through the sealing connection assembly, the sealing protrusion on the second side face of the radial ring and the sealing protrusion on the second side face of the axial ring respectively press-contact the end face of the frustum section in the rear tunnel and the side wall of the large-diameter sealing portion in the rear tunnel.

4. The modular submarine tunnel laying device according to claim 3, wherein the sealing and connecting assemblies are uniformly distributed around the circumferential direction of the joint of the two adjacent tunnels, each sealing and connecting assembly comprises a connecting plate, a spring and a pressing plate, threaded holes are formed in two ends of each connecting plate, the pressing plate is arranged above each connecting plate, the springs are arranged between the connecting plates, the first ends of the springs abut against the connecting plates, the second ends of the springs abut against the pressing plates, the pressing plates and the connecting plates are respectively arranged at large-diameter sealing parts and middle-diameter connecting sections in the front section tunnel and the rear section tunnel, the upper end faces of the pressing plates press the bottom of axial rings in the sealing rings, two ends of each connecting plate are respectively connected with the front section tunnel and the rear section tunnel through bolts, and the inner side faces of the connecting plates are coplanar with the side faces of small-diameter traveling channels in the tunnels.

5. The modular laying device for the submarine tunnel according to claim 1, wherein the rack-and-pinion mechanism comprises a first engine, a pinion and four groups of rack rods, the first engine is arranged on a rear vertical plate of the rack, an output shaft of the first engine penetrates through the rear vertical plate and is connected with the pinion, the four groups of rack rods are arranged around the pinion, the four groups of rack rods are arranged on a rectangular sleeve of the rack, a round rod part on each rack rod is connected with a radial through hole moving pair on the rectangular sleeve, a rack on each group of rack rods is in meshing transmission with the pinion, the four groups of rack rods are respectively perpendicular to the inner wall of the tunnel, a supporting disc is arranged at one end of each group of rack rods, and the first engine can drive the rack rods to linearly move through the rack-and-pinion meshing transmission, so that the supporting disc is in contact with the inner wall of the tunnel to support the propeller in the tunnel.

6. The modular submarine tunnel laying device according to claim 5, wherein the gear screw mechanism comprises four sets of gear screws, a second engine and a bull gear, the second engine is arranged on a front vertical plate of the frame, an output shaft of the second engine penetrates through the front vertical plate and is connected with the bull gear, the four sets of gear screws are arranged on the periphery of the bull gear, gears on the gear screws are in meshing transmission with the bull gear, one end of a screw rod on the gear screws is connected with the gears, the screw rod penetrates through a circumferential through hole in the front end of the front vertical plate and is supported in the circumferential through hole through a bearing, and the other end of the screw rod is in threaded connection with a screw nut on a frame in the sealing head.

7. The modular laying apparatus for submarine tunnels according to claim 6, wherein the sealing head comprises a frame, a flexible sealing ring, four nuts and a drainage pump, the frame is a shell structure composed of a front vertical plate, a rear vertical plate and a shaft sleeve, the flexible sealing ring is arranged around the shaft sleeve, each seal of the flexible sealing ring is in contact with the inner wall of the tunnel, the four nuts are uniformly distributed on the rear vertical plate, the drainage pump is arranged between the front vertical plate and the rear vertical plate, a water suction pipe of the drainage pump passes through a through hole at the lower end of the rear vertical plate and is communicated with an operating area of the submarine tunnel, a drainage pipe of the drainage pump passes through a through hole at the lower end of the front vertical plate and is communicated with a non-operating area of the submarine tunnel, and the drainage pump can drain water in the operating area of the submarine tunnel to the non-operating area of the submarine tunnel.