CN112576262A

CN112576262A - Device for shield tunnel construction of soft soil foundation and using method

Info

Publication number: CN112576262A
Application number: CN202011446749.0A
Authority: CN
Inventors: 张琼方; 娄亚东; 何绍衡
Original assignee: Chongqing Yichenxing Industrial Design Co ltd
Current assignee: Chongqing Yichenxing Industrial Design Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-03-30

Abstract

The invention relates to the technical field of tunnel construction, in particular to a device for shield tunnel construction of a soft soil foundation, which comprises a shield body, a cleaning system and a duct piece assembling system, wherein the shield body is provided with a plurality of segments; the cleaning system is arranged in the shield body, and the duct piece assembling system is connected with the tail part of the shield body; the invention further provides a using method of the device for the shield tunnel construction of the soft soil foundation, and the device solves the problems that in the prior art, when the device is used specifically, the existing urban underground pipeline is very complex, the large-diameter pipe piece is not suitable for tunnel installation with complex and changeable lines, and in the prior art, construction of small-diameter pipe pieces is very time-consuming and precision is difficult to grasp.

Description

Device for shield tunnel construction of soft soil foundation and using method

Technical Field

The invention relates to the technical field of tunnel construction, in particular to a device for shield tunnel construction of a soft soil foundation and a using method.

Background

With the continuous development of urban construction, more and more municipal pipelines are buried underground. Generally, the underground pipeline is installed basically in a burying mode, but for large-diameter urban water diversion steel pipes, due to the fact that the diameter of the steel pipes is large, burying is inconvenient, in addition, due to the fact that urban buildings are more, peripheral buildings need to be removed in the burying process, the engineering quantity is large, and therefore construction difficulty is large, and cost is high.

Carry out the piping erection at the shield tunnel, at present at hydraulic engineering, mine engineering, oil, often meet in the nuclear power pipeline engineering, but to some major diameter's heavy pipeline, because the pipeline is bulky, and the shield tunnel section of jurisdiction is circular section of jurisdiction, its bottom has certain radian, so when carrying out the steel pipe transportation, need utilize the original track in the shield tunnel or the installation track comes to the steel pipe transportation in the tunnel, and after the steel pipe transportation targets in place, support the steel pipe through the support, demolish the track in the tunnel again, then carry out the installation of steel pipe. Due to the limited space of the shield tunnel and the large diameter of the steel pipe, after the steel pipe is transported into the tunnel, the area between the steel pipe and the track is narrow, so that inconvenience is brought to dismantling of the track and installation of the steel pipe.

Chinese patent publication No. CN111119913A discloses a TBM delicacy-removal processing method in tunnel construction and a tunnel construction structure, including the following steps: firstly, constructing a pilot tunnel above a vault of a TBM close to a shield along a tunneling direction and carrying out primary support on the pilot tunnel; step two, carrying out two-side expanding excavation on the pilot tunnel section close to the cutter head to form an expanded excavation hole and carrying out primary support on the expanded excavation hole; thirdly, constructing an advanced pipe shed by using a pilot tunnel expanded excavation space to support surrounding rocks ahead of the excavation; and fourthly, tunneling by the TBM after the construction of the advanced pipe shed is completed. Constructing a pilot tunnel above the vault at the position, close to the shield, of the TBM along the tunneling direction, so that the excavation engineering quantity is small; the method has the advantages that the two sides of the pilot tunnel section close to the cutter head are expanded and excavated to form expanded excavation tunnels, the external insertion angles of the pipe shed are eliminated by utilizing the space, the horizontal advanced pipe shed is constructed, the large range of the upper part of the cutter head is effectively reinforced, the rotation resistance of the cutter head is reduced, the method is favorable for quick escape of TBM, the construction is simple and convenient, the operation efficiency is obviously improved, and the construction cost is low.

Also, a chinese patent with publication number CN111022080A discloses a connection structure of a track beam and a shield tunnel, which includes a steel pipe sheet, a base and a support, wherein the steel pipe sheet is used for forming a lining ring of the shield tunnel; the base comprises a steel reinforcement cage and a concrete layer, the steel reinforcement cage is welded with the steel pipe sheet, and the concrete layer is formed by pouring concrete on the steel reinforcement cage; one end of the support is connected with the base, and the other end of the support is detachably connected with the track beam. Because the support is detachably connected with the track beam, the position of the track beam can be conveniently adjusted according to the linear change of the shield tunnel according to the on-site construction requirement, and the track beam is also convenient to maintain and replace. The embodiment of the application also provides a construction method of the connection structure of the track beam and the shield tunnel, wherein the construction method of the connection structure of the track beam and the shield tunnel is the construction method of the connection structure of the track beam and the shield tunnel, and the shield tunnel comprises the connection structure of the track beam and the shield tunnel.

The major diameter section of jurisdiction that above-mentioned structure all adopted, but because present city underground piping is very complicated, the tunnel that the minor diameter section of jurisdiction was under construction more is applicable to complicated city underground piping, and adopts above-mentioned prior art to carry out the construction of minor diameter section of jurisdiction, and very consuming time, and be difficult to hold the precision, can take place shield portion infiltration.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a device for shield tunnel construction of a soft soil foundation and a using method thereof.

The basic scheme of the invention is as follows: a device for shield tunnel construction of a soft soil foundation comprises a shield body, a cleaning system and a segment assembling system;

the cleaning system is arranged in the shield body, and the duct piece assembling system is connected with the tail part of the shield body;

the system is assembled to section of jurisdiction passes through mounting disc and shield body end connection, just the system is assembled to section of jurisdiction includes promotion portion and clamping part, promotion portion and mounting disc fixed connection, just the clamping part with the free expansion end of promotion portion is connected, the clamping part centre gripping section of jurisdiction splices.

When specifically using, it is very complicated to be directed against in current city underground pipeline, the unsuitable complicated changeable tunnel installation of circuit of section of jurisdiction of major diameter, and prior art carries out the construction of minor diameter section of jurisdiction, it is very consuming time, and be difficult to hold the precision, and great rock and cobblestone can be broken into the fritter by crushing mechanism in the soil storehouse, avoid hard rock particle diameters such as cobblestone to exceed the maximum particle diameter of shield structure machine, and unable breakage, cause the jam passageway to screw conveyer, need remove the condition of rock from excavation cabin manual work, degree of automation is high, save manpower, construction speed is fast.

Preferably, the pushing portions and the clamping portions are arranged in plurality, the number of the pushing portions is equal to that of the clamping portions, the pushing portions are distributed on the mounting disc at even intervals in a circumferential manner, and a stabilizing portion is connected between every two adjacent pushing portions;

the utility model discloses a synchronous rotation of promotion portion, including the mounting disc, promotion portion one end is the stiff end, and is a plurality of the stiff end of promotion portion pass through the drive shaft with the mounting disc is connected, just when the drive shaft rotates, synchronous rotation is done with the mounting disc to a plurality of promotion portions of drive.

Set up a plurality of promotion portions and clamping part, can install the section of jurisdiction of a plurality of minor diameters simultaneously, promoted installation effectiveness and construction speed greatly to the section of jurisdiction of minor diameter is stronger for the section of jurisdiction of major diameter, bending resistance. The duct piece is a main assembly component for shield construction, is the outermost barrier of the tunnel and plays a role in resisting soil layer pressure, underground water pressure and some special loads. The quality of the shield segment is directly related to the overall quality and safety of the tunnel, the waterproof performance and the durability of the tunnel are affected, the shield segment can be flexibly selected by adopting a small-diameter segment for installation, and the requirement of advancing of a fitting line is met.

Preferably, each of the pushing parts includes a profile connecting rod, a sleeve, a hydraulic rod, and a cylinder;

the utility model discloses a hydraulic drive device, including special-shaped connecting rod, pivot, cylinder, maintenance window, special-shaped connecting rod, hydraulic stem, special-shaped connecting rod, just special-shaped connecting rod one end is opened there is the through-hole, and is a plurality of the one end of the special-shaped connecting rod of promotion portion all passes through the through-hole with the pivot and rotates and be connected, the other end and the hydraulic stem of special-shaped connecting rod are connected, the other end of hydraulic stem is driven by the cylinder, cylinder one end and muffjoint, the sleeve both ends are link up, just the maintenance window has still been opened to the sleeve, inside.

Preferably, the clamping part is connected with the fixed end of the cylinder and comprises a connecting base, a sliding base, a lead screw, a sliding plate, a rotating support, a hinging sheet, a rotating torque adjuster, a rotating shaft, a rotating connecting plate and a rotating connecting rod;

the clamping part is fixedly connected with the fixed end of the air cylinder through a connecting base, the connecting base is slidably connected above the sliding base, a sliding plate is slidably connected below the sliding base and provided with two connecting holes, a lead screw penetrates through each connecting hole, the two lead screws are arranged on two sides of the sliding base in parallel, the lower part of the sliding plate is fixedly connected with a rotating support, two sides of the bottom of the rotating support are respectively crossed with a hinge plate, the rotating connecting plate is rotatably connected with the rotating support through the two hinge plates, two ends of the rotating connecting plate are fixedly connected with rotating shafts, the rotating shafts are rotatably connected with the hinge plates, a rotating connecting rod is arranged on the rotating connecting plate, and an adsorption mechanism is fixedly installed on the rotating connecting rod;

the hinged sheet and the rotating shaft are connected with a rotating torque adjuster.

Preferably, the adsorption mechanism comprises an adsorption connection base, a sucker and a sucker core; an adsorption connecting base is communicated above the sucker and fixedly connected with a rotating connecting rod on the rotating connecting plate, a plurality of central plug-ins are arranged between the adsorption connecting base and the sucker, a gap is arranged between each central plug-in, a suction connector is arranged in each interval and connected with a suction pipe, a sucker core is arranged in the middle of the sucker and connected with the suction connector;

and one side of the sucker, which deviates from the adsorption connection base, is also provided with a cushion pad.

Preferably, the shield body comprises a shield shell, a cutter head and a soil discharging system, the cutter head is arranged at the left end of the shield shell, the soil discharging system is arranged in the shield shell, and the front end of the soil discharging system is in conduction connection with the rear end of the cleaning system;

the soil discharging system comprises a screw conveyor and a belt conveyor, wherein the head end of the belt conveyor is arranged below the tail end of the screw conveyor, the screw conveyor is driven by a swash plate type variable axial plunger motor, the belt conveyor is driven by a motor, muck is conveyed onto the belt conveyor from a muck bin by the screw conveyor, the belt conveyor conveys the muck backwards to the tail part of a fourth trolley and falls into a soil box of a waiting muck trolley, after the soil box is filled, the muck is conveyed to a vertical shaft along a track by traction of a storage battery trolley, and a gantry crane lifts the muck box to the ground and dumps the muck;

the cutter head comprises a shovel cutter, a cutting cutter, a push-out type hob and a profiling cutter, wherein the shovel cutter and the profiling cutter are arranged on the outer ring of the cutter head, and the cutting cutter and the push-out type hob are uniformly distributed along the central shaft of the cutter head.

Preferably, when the two duct pieces are spliced, a duct piece reinforcing structure is arranged at the joint of the two pipelines;

the duct piece reinforcing structure comprises a reinforcing piece, a reinforcing pipe and a reinforcing support, wherein the reinforcing piece is provided with a splicing gap of two duct pieces, and the reinforcing pipe and the reinforcing support are arranged on one side of the reinforcing piece, which is far away from the duct pieces;

the reinforcing piece is a plurality of reinforcing sections and a plurality of decompression sections, the reinforcing sections are integrally formed body elastic pieces, one decompression section is arranged between every two reinforcing sections, the pressurizing sections are arc-shaped grooves, the decompression pipes are arranged at the transition connection positions of the pressurizing sections and the reinforcing sections, and the reinforcing piece is connected with the two pipe pieces through the reinforcing pipes, the reinforcing supports and the connecting screws.

Preferably, the cleaning system comprises a screen assembly, a crushing mechanism;

the cleaning system comprises a screening component and a crushing mechanism;

the rear end of the screening component is fixedly connected with the front end of the crushing mechanism, the screening component comprises a stone inlet, a screening net and a scattering part, the tail part of the stone inlet is in conduction connection with the front part of the screening net, and the scattering part is arranged inside the screening net; the screen cloth includes rubble screen cloth, whole stone screen cloth, rubble screen cloth rear end and whole stone screen cloth front end fixed connection, the hole on the whole stone screen cloth is greater than the hole on the rubble screen cloth.

When the screening device is used specifically, large rocks are smashed through the cutter head and are conveyed into the screening net after being divided into small blocks, because hard rocks such as cobblestones cannot be smashed, the cutter head is not broken thoroughly, small cobblestones are mixed with dust in stone materials, one side of the breaking part is connected with a motor, full-automatic operation is realized, after the gravel screen is subjected to vibration screening, materials which are mixed and stuck in the cobblestones and are below the diameter of a control screen hole, and hard rocks or cobblestones which are larger than the diameter of the screen hole of the gravel screen are effectively screened, secondary screening is carried out through the whole-stone screen, the cobblestones are separated from broken soil, the screening effect and speed are improved, the screening component can automatically clean and screen stone materials meeting requirements except special conditions which affect the quality of the stone materials, manual interference is not needed, the processes of poking and cleaning of the screen by workers are reduced, and the labor intensity of manual work is greatly, the screening penetration rate is improved, and the screening efficiency is obviously improved.

Preferably, the scattering component comprises a separation scattering arm and a curved scattering arm, the separation scattering arm is arranged in the stone-dressing screen area, the curved scattering arm is arranged in the gravel screen area, and the front end of the separation scattering arm is fixedly connected with the rear end of the curved scattering arm;

the separation scattering arm comprises a separation scattering rotating shaft, a first separation scattering rod, a second separation scattering rod and a third separation scattering rod, and the first separation scattering rod, the second separation scattering rod and the third separation scattering rod are uniformly distributed by taking the separation scattering rotating shaft as an axis;

the first separating and scattering rod comprises a first separating and scattering sheet, and the first separating and scattering sheet is fixed at the tail end of the rod body of the first separating and scattering rod;

the second separating and scattering rod comprises a second separating and scattering sheet, and the second separating and scattering sheet is arranged at the tail end of the rod body of the second separating and scattering rod in a folding mode;

the third separating and scattering rod comprises two groups of secondary separating and scattering rod bodies, and the head parts of the secondary separating and scattering rod bodies are movably connected with the tail parts of the third separating and scattering rod bodies;

the tail end of each group of secondary separation scattering rod bodies is also provided with a secondary separation scattering sheet;

the curved scattering arm comprises a curved scattering main shaft, a first curved scattering sheet and a second curved scattering sheet, the first curved scattering sheet and the second curved scattering sheet are spirally fixed on the curved scattering main shaft by taking the curved scattering main shaft as an axis, and the first curved scattering sheet is sleeved outside the second curved scattering sheet.

When the soil breaking machine is used specifically, large rocks are broken through the cutter head and are conveyed into the screening net after being divided into small blocks, due to the particularity of soft soil geology, the soil moisture content is high, the soil is adhered, the curved breaking arm can break up the agglomerated or adhered soil blocks, the first curved breaking piece is spirally sleeved outside the second curved breaking piece, when the curved breaking main shaft drives the curved breaking arm to break up, the double-spiral breaking blade can break the soil adhesion, cobblestones can be better separated from the soil blocks, after the curved breaking main shaft breaks the soil entering the cutter head for the first time, the cobblestones or hard rocks or soil blocks which cannot be broken up enter a whole stone screen area, and under the condition of serious soil block adhesion, the folding part can be opened, the breaking area is increased, the breaking efficiency is improved, the secondary separation breaks up the rod body when in work, can detect out large-scale cobblestone soil block, after detecting large-scale cobblestone soil block, the body of rod can carry out the centre gripping rotation to large-scale cobblestone soil block is broken up in secondary separation, increase centrifugal force separates the soil stone, through quick separate soil stone, be favorable to carrying the quick transport of link, avoid simultaneously stopping up, and through the soil stone separation with the adhesion on the cobblestone, when broken mechanism carries out the breakage to the cobblestone, can be more high-efficient and crushing effect better, energy saving.

The invention further provides a using method of the device for shield tunnel construction of the soft soil foundation, which comprises the following steps:

s1, tunneling a cutter head, driving the cutter head through a cutter head motor arranged on a flange on a pressure-bearing partition plate of a front shield, excavating in two directions by a shovel cutter, assisting the shield tunneling machine to turn by the super-excavation function of a copying cutter, smashing large rocks by a hobbing cutter, and enabling the crushed rocks to enter a screening assembly through a rock inlet after being divided into small blocks;

s2, screening stones, wherein one side of the scattering component is connected with a motor to realize full-automatic operation, after the gravel screen is vibrated and screened, materials below the diameter of a control screen hole which are mixed in cobblestones are effectively screened, hard rocks or cobblestones which are larger than the diameter of the screen hole of the gravel screen are screened secondarily through the stone adjusting screen to ensure that the cobblestones are separated from broken soil, after a curved scattering main shaft is used for firstly scattering soil which enters a cutter head, the cobblestones or hard rocks or soil blocks which cannot be scattered enter the area of the stone adjusting screen, the separation scattering rotating shaft drives the first separation scattering rod, the second separation scattering rod and the third separation scattering rod to rotate, the two separation scattering pieces can open a folding part under the condition that soil blocks are seriously adhered, the scattering area is increased, the scattering efficiency is improved, and the secondary separation scattering rod body can detect large cobblestone soil blocks when in work, after the large cobblestone soil blocks are detected, the secondary separation scattering rod body can clamp and rotate the large cobblestone soil blocks, the centrifugal force is increased to separate soil and stones, and the soil and stones are rapidly separated;

s3, crushing stone, separating cobblestone soil and stones, and then feeding the cobblestone soil and stones into a crushing mechanism, wherein the crushing mechanism drives the movable crushing plate to vibrate through the power assembly, and extrudes and crushes the stone between the movable crushing plate and the multi-stage crushing plate and the stone between the movable crushing plate and the main fixed crushing plate;

s4, conveying stone, driving a screw conveyor by a swash plate type variable axial plunger motor, driving a belt conveyor by a motor, conveying the slag soil from a soil bin to the belt conveyor by the screw conveyor, conveying the slag soil backwards to the tail part of a fourth trolley by the belt conveyor, enabling the slag soil to fall into a soil box of a waiting slag trolley, after the soil box is full, conveying the slag soil to a vertical shaft along a rail by traction of a battery truck, and hoisting the soil box to the ground by a gantry crane and pouring the slag soil into a slag pit;

s5, assembling the segments, rapidly assembling the segments into a ring after the shield propulsion is finished, alternately installing the standard segments on the left side and the right side in sequence from the standard segment on the lower part, then assembling the adjacent segment, finally installing the capping segment, fastening the circumferential connecting bolt firstly, and fastening the axial connecting bolt secondly. The axial connecting bolts are fastened by adopting a torque wrench, the fastening force depends on the diameter and the strength of the bolts, and after the ring pipe sheets are assembled, all the shield jacks are used for uniformly applying pressure to sufficiently fasten the axial connecting bolts;

in the installation process, the synchronous installation of a plurality of small-diameter pipe pieces can be realized by utilizing the pipe piece assembling system in the device, a plurality of pushing parts and clamping parts are arranged on an installation disc, each clamping part can clamp one pipe piece, when one clamping part clamps one pipe piece, the clamping part rotates for a certain angle, the next clamping part continues to clamp the pipe piece and rotates for a certain angle, the pipe piece can be pushed to the position to be installed under the action of a sliding base and a lead screw of the clamping part, and because the shape and the size of the pipe piece are different in the actual operation, the angle adjustment can be realized under the action of a rotating support, a rotating shaft, a rotating connecting plate and a rotating connecting rod, so that the installation of the pipe pieces in various shapes is met;

s6, reinforcing the duct piece, and after the duct piece is formed into a ring, installing the duct piece reinforcing structure at the splicing gap of the spliced duct pieces to realize duct piece reinforcement.

The working principle and the advantages of the invention are as follows:

(1) when the tunnel is used specifically, aiming at the situation that the existing urban underground pipeline is very complex, and a segment with a large diameter is not suitable for tunnel installation with complex and variable lines, the construction of a segment with a small diameter in the prior art is very time-consuming and difficult to control the precision, and large rocks and cobblestones in a soil bin can be crushed into small blocks by a crushing mechanism, so that the situation that the particle size of hard rocks such as cobblestones exceeds the maximum particle size of a shield machine and cannot be crushed, the channel is blocked by a screw conveyor, and the rocks need to be manually removed from an excavation cabin is avoided, the automation degree is high, the manpower is saved, and the construction speed is high;

(2) set up a plurality of promotion portions and clamping part, can install the section of jurisdiction of a plurality of minor diameters simultaneously, promoted installation effectiveness and construction speed greatly to the section of jurisdiction of minor diameter is stronger for the section of jurisdiction of major diameter, bending resistance. The duct piece is a main assembly component for shield construction, is the outermost barrier of the tunnel and plays a role in resisting soil layer pressure, underground water pressure and some special loads. The quality of the shield segment is directly related to the overall quality and safety of the tunnel, the waterproof performance and the durability of the tunnel are influenced, and the shield segment can be flexibly selected by adopting a small-diameter segment for installation, so that the traveling requirement of a fitting line is met;

(3) when the screening device is used specifically, large rocks are smashed through the cutter head and are conveyed into the screening net after being divided into small blocks, because hard rocks such as cobblestones cannot be smashed, the cutter head is not broken thoroughly, small cobblestones are mixed with dust in stone materials, one side of the breaking part is connected with a motor, full-automatic operation is realized, after the gravel screen is subjected to vibration screening, materials which are mixed and stuck in the cobblestones and are below the diameter of a control screen hole, and hard rocks or cobblestones which are larger than the diameter of the screen hole of the gravel screen are effectively screened, secondary screening is carried out through the whole-stone screen, the cobblestones are separated from broken soil, the screening effect and speed are improved, the screening component can automatically clean and screen stone materials meeting requirements except special conditions which affect the quality of the stone materials, manual interference is not needed, the processes of poking and cleaning of the screen by workers are reduced, and the labor intensity of manual work is greatly, the screening penetration rate is improved, and the screening efficiency is obviously improved.

Drawings

FIG. 1 is a schematic structural view of a shield tunnel construction device for a soft soil foundation according to the present invention;

FIG. 2 is an enlarged view of the Y-section of FIG. 1;

fig. 3 is a schematic structural view of a segment assembling system of the device for shield tunnel construction of a soft soil foundation according to the present invention (schematic view of installing only one clamping portion);

FIG. 4 is an enlarged view of a portion X of FIG. 3;

FIG. 5 is a schematic structural view of a clamping portion of the device for shield tunnel construction of a soft soil foundation according to the present invention;

FIG. 6 is a schematic view showing the structure of a holding part of the device for shield tunnel construction of a soft soil foundation according to the present invention (adsorption removal mechanism);

FIG. 7 is a schematic structural view of an adsorption mechanism of the device for shield tunnel construction of a soft soil foundation according to the present invention;

FIG. 8 is a schematic view of segment splicing and reinforcing of the device for shield tunnel construction of a soft soil foundation according to the present invention;

fig. 9 is a schematic structural view (view one) of a segment reinforcement structure of the device for shield tunnel construction of a soft soil foundation according to the present invention;

fig. 10 is a schematic structural view (view two) of a segment reinforcement structure of the device for shield tunnel construction of a soft soil foundation according to the present invention;

FIG. 11 is a schematic structural view of a cleaning system of the device for shield tunnel construction of a soft soil foundation according to the present invention;

FIG. 12 is a schematic structural view (view one) of a screen assembly of the device for shield tunnel construction of a soft soil foundation according to the present invention;

FIG. 13 is a schematic structural view (view II) of a screening assembly of the device for shield tunnel construction of a soft soil foundation according to the present invention;

FIG. 14 is a schematic view of a cutter head structure of the device for shield tunnel construction of a soft soil foundation according to the present invention;

reference numerals referred to in the drawings are:

the shield body A, the shield shell A1, the cutter head A2, the scraper knife A21, the cutting knife A22, the push-out hob A23 and the copying knife A24;

cleaning the system B;

screen assembly B1; stone inlet B11; a screening net B12, a gravel screen B121 and a stone-finishing screen B122;

a breaking component B13, a separation breaking arm B131, a separation breaking rotating shaft B1311, a first separation breaking rod B1312, a first separation breaking sheet B13121, a second separation breaking rod B1313, a second separation breaking sheet B13131, a third separation breaking rod B1314, a secondary separation breaking rod body B13141, a secondary separation breaking sheet B131411, a curved breaking arm B132, a curved breaking main shaft B1321, a first curved breaking sheet B1322 and a second curved breaking sheet B1323; a crushing mechanism B2;

the duct piece assembling system C, the mounting disc C1 and the driving shaft C2;

the pushing part C3, the special-shaped connecting rod C301, the sleeve C302, the hydraulic rod C304 and the air cylinder C305;

a stabilizer C4;

a clamping part C5, a connecting base C501, a sliding base C502, a screw rod C503, a sliding plate C504, a rotating support C505, a hinge plate C506, a rotating torque adjuster C507, a rotating shaft C508, a rotating connecting plate C509, a rotating connecting rod C5091, a suction mechanism C510, a suction cup connecting base C5100, a suction cup core C5102, a suction cup C5103, a buffer cushion C5104, a screw rod C503, a rotating connecting rod C5091, a suction cup connecting base C5100, a suction cup,

The pipe piece D, a pipe piece reinforcing structure D1, a reinforcing sheet D101, a pressure reducing section D101, a reinforcing section D1012, a reinforcing pipe D102 and a reinforcing support D103.

Detailed Description

The following is further detailed by the specific embodiments:

the first embodiment is as follows:

as shown in fig. 1 to 7, a device for shield tunnel construction of a soft soil foundation comprises a shield body a, a cleaning system B and a segment D assembling system C;

the cleaning system B is arranged in the shield body A, and the duct piece D assembling system C is connected with the tail of the shield body A;

duct piece D assembling system C is connected with the tail of the shield body A through a mounting disc C1, the duct piece D assembling system C comprises a pushing portion C3 and a clamping portion C5, the pushing portion C3 is fixedly connected with the mounting disc C1, the clamping portion C5 is connected with the free movable end of the pushing portion C3, and the clamping portion C5 clamps the duct piece D for splicing.

The pushing portions C3 and the clamping portions C5 are provided in plurality, the pushing portions C3 are equal to the clamping portions C5 in number, the pushing portions C3 are distributed on the mounting plate C1 at uniform intervals in a circumferential mode, and a stabilizing portion is connected between every two adjacent pushing portions C3;

one end of the pushing part C3 is a fixed end, and the fixed ends of the pushing parts C3 are connected to the mounting plate C1 through the driving shaft C2, and when the driving shaft C2 rotates, the pushing parts C3 and the mounting plate C1 are driven to rotate synchronously.

Each pushing portion C3 includes a shaped connecting rod C301, a sleeve C302, a hydraulic rod C304, and a cylinder C305;

dysmorphism connecting rod C301 is the dogleg shape, and special-shaped connecting rod C301 one end is opened there is the through-hole, the one end of the special-shaped connecting rod C301 of a plurality of promotion portions C3 all passes through the through-hole with pivot C508 and rotates and be connected, special-shaped connecting rod C301's the other end is connected with hydraulic stem C304, hydraulic stem C304's the other end is driven by cylinder C305, cylinder C305 one end is connected with sleeve C302, sleeve C302 both ends are link up, and sleeve C302 still opens the maintenance window, sleeve C302 is inside to be located with the junction of hydraulic stem C304 to special-shaped connecting rod C301, and the maintenance window is directly over special-shaped connecting rod C301 and the junction of hydraulic stem.

The clamping part C5 is connected with the fixed end of the air cylinder C305, and the clamping part C5 comprises a connecting base C501, a sliding base C502, a lead screw C503, a sliding plate C504, a rotating support C505, a hinge sheet C506, a rotating torque adjuster C507, a rotating shaft C508, a rotating connecting plate C509 and a rotating connecting rod C5091;

the clamping part C5 is fixedly connected with the fixed end of the cylinder C305 through a connecting base C501, the connecting base C501 is slidably connected above a sliding base C502, a sliding plate C504 is slidably connected below the sliding base C502, the sliding plate C504 is provided with two connecting holes, a lead screw C503 penetrates through each of the two connecting holes, the two lead screws C503 are arranged on two sides of the sliding base C502 in parallel, the lower part of the sliding plate C504 is fixedly connected with a rotating support C505, two sides of the bottom of the rotating support C505 are respectively crossed with a hinged sheet C506, a rotating connecting plate C509 is rotatably connected with the rotating support C505 through two hinged sheets C506, two ends of the rotating connecting plate C509 are fixedly connected with a rotating shaft C508, the rotating shaft C508 is rotatably connected with the hinged sheet C506, a rotating connecting rod C5091 is arranged on the rotating connecting plate C509, and an adsorption mechanism C510 is fixedly;

the hinged sheet C506 is connected with the rotating shaft C508 and is also provided with a rotating torque adjuster C507.

The adsorption mechanism C510 comprises an adsorption connection base C501, a sucker C5103 and a sucker core C5102; a suction connecting base C501 is communicated with the upper part of the sucker C5103 and is fixedly connected with a rotating connecting rod C5091 on a rotating connecting plate C509, a plurality of central plug-ins are arranged between the suction connecting base C501 and the sucker C5103, a gap is arranged between each central plug-in, a suction connector is arranged in each interval, the suction connector is connected with a suction pipe, a sucker core C5102 is arranged in the middle of the sucker C5103, and the sucker core C5102 is connected with the suction connector;

and a buffer pad C5104 is arranged on one side of the sucker C5103 departing from the adsorption connecting base C501.

The shield body A comprises a shield shell A1, a cutter head A2 and a soil discharging system, wherein the cutter head A2 is installed at the left end of the shield shell A1, the soil discharging system is installed inside the shield shell A1, and the front end of the soil discharging system is communicated and connected with the rear end of the cleaning system B;

the soil discharging system comprises a screw conveyor and a belt conveyor, wherein the head end of the belt conveyor is arranged below the tail end of the screw conveyor, the screw conveyor is driven by a swash plate type variable axial plunger motor, the belt conveyor is driven by a motor, muck is conveyed to the belt conveyor from a muck bin by the screw conveyor, the belt conveyor conveys the muck backwards to the tail part of a fourth trolley and falls into a soil box of a waiting muck trolley, the muck is conveyed to a vertical shaft along a rail by traction of a storage battery trolley after the soil box is filled, and a gantry crane lifts the muck box to the ground and pours the muck into the muck pit;

the cutter head A2 comprises a shovel cutter A21, a cutting cutter A22, a push-out hob A23 and a profiling cutter A24, the shovel cutter A21 and the profiling cutter A24 are arranged on the outer ring of the cutter head A2, and the cutting cutter A22 and the push-out hob A23 are uniformly distributed along the central shaft of the cutter head A2.

Example two:

as shown in fig. 1-10, a device for shield tunnel construction of a soft soil foundation comprises a shield body a, a cleaning system B and a segment D assembling system C;

When the two duct pieces D are spliced, a duct piece reinforcing structure D1 is arranged at the joint of the two pipelines;

the segment reinforcing structure D1 comprises a reinforcing sheet D101, a reinforcing pipe D102 and a reinforcing support D103, wherein the reinforcing sheet D101 is provided with a splicing gap of two segments D, and the reinforcing pipe D102 and the reinforcing support D103 are arranged on one side of the reinforcing sheet D101, which is far away from the segments D;

reinforcing piece D101 is a plurality of reinforcing sections D1012 and the solid elastic piece of decompression section D101 integrated into one piece, is equipped with a decompression section D101 between per two reinforcing sections D1012, and the pressurization section is the arc recess, and the transition junction department of pressurization section and reinforcing section D1012 is located to the decompression pipe, and reinforcing piece D101 is connected with two sections of jurisdiction D through reinforcing pipe D102, reinforcing support D103 and connecting screw.

Example three:

as shown in fig. 1-14, a device for shield tunnel construction of soft soil foundation comprises a shield body a, a cleaning system B and a segment D assembling system C;

Cleaning system B comprises a screening component B1 and a crushing mechanism B2;

the rear end of the screening component B1 is fixedly connected with the front end of a crushing mechanism B2, the screening component B1 comprises a stone inlet B11, a screening net B12 and a scattering component B13, the tail part of the stone inlet B11 is communicated and connected with the front part of the screening net B12, and the scattering component B13 is arranged inside a screening net B12; the screening net B12 comprises a gravel screen B121 and a stone finishing screen B122, the rear end of the gravel screen B121 is fixedly connected with the front end of the stone finishing screen B122, and holes in the stone finishing screen B122 are larger than holes in the gravel screen B121.

The scattering component B13 comprises a separation scattering arm B131 and a curved scattering arm B132, the separation scattering arm B131 is arranged in a stone-dressing screen B122 area, the curved scattering arm B132 is arranged in a gravel screen B121 area, and the front end of the separation scattering arm B131 is fixedly connected with the rear end of the curved scattering arm B132;

the separation breaking arm B131 comprises a separation breaking rotating shaft C508B1311, a first separation breaking rod B1312, a second separation breaking rod B1313 and a third separation breaking rod B1314, and the first separation breaking rod B1312, the second separation breaking rod B1313 and the third separation breaking rod B1314 are uniformly distributed by taking the separation breaking rotating shaft C508B1311 as an axis;

the first separating and scattering rod B1312 comprises a first separating and scattering sheet B13121, and the first separating and scattering sheet B13121 is fixed at the tail end of the rod body of the first separating and scattering rod B1312;

the second separating and scattering rod B1313 comprises a second separating and scattering sheet B13131, and the second separating and scattering sheet B13131 is arranged at the tail end of the rod body of the second separating and scattering rod B1313 in a folding mode;

the third separating and scattering rod B1314 comprises two groups of secondary separating and scattering rod bodies B13141, and the head part of each secondary separating and scattering rod body B13141 is movably connected with the tail part of the third separating and scattering rod B1314;

the tail end of each group of secondary separation scattering rod bodies B13141 is also provided with a secondary separation scattering sheet B131411;

the curved scattering arm B132 includes a curved scattering main shaft B1321, a first curved scattering sheet B1322 and a second curved scattering sheet B1323, the first curved scattering sheet B1322 and the second curved scattering sheet B1323 are spirally fixed to the curved scattering main shaft B1321 with the curved scattering main shaft B1321 as an axis, and the first curved scattering sheet B1322 is sleeved outside the second curved scattering sheet B1323.

The embodiment further provides a using method of the device for the shield tunnel construction of the soft soil foundation, which comprises the following steps:

s1, a cutter head A2 is tunneled, the cutter head A2 is driven by a cutter head A2 motor arranged on a flange on a pressure-bearing partition plate of a front shield, a shovel cutter A21 performs bidirectional excavation, the over-excavation function of a copying cutter can help the shield tunneling machine to turn, a hob breaks large rocks, and the large rocks are divided into small rocks and then enter a screening component B1 through a stone inlet B11;

s2, stone screening, wherein one side of a breaking component B13 is connected with a motor to realize full-automatic operation, after the gravel screen B121 is subjected to vibration screening, materials below the control screen hole diameter mixed in cobbles are effectively screened, hard rocks or cobbles larger than the screen hole diameter of the gravel screen B121 are screened secondarily through a stone-finishing screen B122 to ensure that the cobbles are separated from broken soil, after a curved breaking main shaft B1321 breaks the soil entering from a cutterhead A2 for the first time, the cobbles or hard rocks or soil blocks which cannot be broken up enter the area of the stone-finishing screen B122, a separating and breaking rotating shaft C508B1311 drives a first separating and breaking rod B1312, a second separating and breaking rod B1313 and a third separating and breaking rod B1314 to rotate, and when the two separating and breaking pieces are seriously adhered to soil blocks, a folding part can be opened, the breaking area is increased, the breaking efficiency is improved, and the secondary separating and breaking rod body B13141 is operated, the large cobblestone soil blocks can be detected, after the large cobblestone soil blocks are detected, the secondary separation scattering rod body B13141 can clamp and rotate the large cobblestone soil blocks, centrifugal force is increased to separate soil and stones, and the soil and stones are rapidly separated;

s3, crushing stone, separating cobblestone soil and stones, and then feeding the cobblestone soil and stones into a crushing mechanism B2, wherein the crushing mechanism B2 drives a movable crushing plate to vibrate through a power assembly, and extrudes and crushes the stone between the movable crushing plate and a multi-stage crushing plate and the stone between the movable crushing plate and a main fixed crushing plate;

s5, assembling the duct pieces D, rapidly assembling the duct pieces D into a ring after the shield propulsion is finished, alternately installing the standard duct pieces D on the left side and the right side in sequence from the standard block duct pieces D on the lower portion, then assembling the adjacent block duct pieces D, finally installing the capping block duct pieces D, fastening the annular connecting bolts firstly, and fastening the axial connecting bolts secondly. The ring pipe pieces D are assembled, and then all the shield jacks are used for uniformly applying pressure to fully fasten the axial connecting bolts;

in the installation process, a plurality of small-diameter pipe pieces D can be synchronously installed by utilizing a pipe piece D assembling system C in the device, a plurality of pushing parts C3 and clamping parts C5 are arranged on an installation disc C1, each clamping part C5 can clamp one pipe piece D, when one clamping part C5 clamps one pipe piece D and then rotates for a certain angle, the next clamping part C5 continues to clamp the pipe piece D and then rotates for a certain angle, the pipe piece D can be pushed to a position to be installed under the action of a sliding base C502 and a lead screw C503 of the clamping part C5, and because the shapes and the sizes of the pipe pieces D are different in actual operation, angle adjustment can be realized under the action of a rotating support C505, a rotating shaft C508, a rotating connecting plate 509C and a rotating connecting rod C5091, and installation of the pipe pieces D in various shapes is met;

s6 and reinforcing the segment D, and after the segment D is formed into a ring, installing the segment reinforcing structure D1 at the splicing gap of the spliced segment D to reinforce the segment D.

The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.

Claims

1. The utility model provides a device is used in shield tunnel construction of soft soil foundation which characterized in that: comprises a shield body, a cleaning system and a duct piece assembling system;

2. The device for shield tunnel construction of the soft soil foundation according to claim 1, characterized in that: the pushing parts and the clamping parts are arranged in plurality, the number of the pushing parts is equal to that of the clamping parts, the pushing parts are circumferentially distributed on the mounting disc at uniform intervals, and a stabilizing part is connected between every two adjacent pushing parts;

3. The device for shield tunnel construction of the soft soil foundation according to claim 2, characterized in that: each pushing part comprises a special-shaped connecting rod, a sleeve, a hydraulic rod and a cylinder;

4. The device for shield tunnel construction of the soft soil foundation according to claim 3, characterized in that: the clamping part is connected with the fixed end of the air cylinder and comprises a connecting base, a sliding base, a lead screw, a sliding plate, a rotating support, a hinging sheet, a rotating torque adjuster, a rotating shaft, a rotating connecting plate and a rotating connecting rod;

5. The device for shield tunnel construction of the soft soil foundation according to claim 4, characterized in that: the adsorption mechanism comprises an adsorption connection base, a sucker and a sucker core; an adsorption connecting base is communicated above the sucker and fixedly connected with a rotating connecting rod on the rotating connecting plate, a plurality of central plug-ins are arranged between the adsorption connecting base and the sucker, a gap is arranged between each central plug-in, a suction connector is arranged in each interval and connected with a suction pipe, a sucker core is arranged in the middle of the sucker and connected with the suction connector;

6. The device for shield tunnel construction of the soft soil foundation according to claim 5, characterized in that: the shield body comprises a shield shell, a cutter head and a soil discharging system, wherein the cutter head is arranged at the left end of the shield shell, the soil discharging system is arranged in the shield shell, and the front end of the soil discharging system is communicated with the rear end of the cleaning system;

7. The device for shield tunnel construction of the soft soil foundation according to claim 6, characterized in that: when the two duct pieces are spliced, a duct piece reinforcing structure is arranged at the joint of the two pipelines;

8. The device for shield tunnel construction of the soft soil foundation according to claim 7, characterized in that: the cleaning system comprises a screening component and a crushing mechanism;

9. The device for shield tunnel construction of the soft soil foundation according to claim 8, characterized in that: the breaking component comprises a separation breaking arm and a curved breaking arm, the separation breaking arm is arranged in a stone-dressing screen area, the curved breaking arm is arranged in a gravel screen area, and the front end of the separation breaking arm is fixedly connected with the rear end of the curved breaking arm;

10. The use method of the soft soil foundation shield tunnel construction device according to claim 9, characterized in that: the method comprises the following steps: