CN120312241A - A pipeline renewal pipe jacking machine and pipeline renewal construction method - Google Patents
A pipeline renewal pipe jacking machine and pipeline renewal construction methodInfo
- Publication number
- CN120312241A CN120312241A CN202510636158.6A CN202510636158A CN120312241A CN 120312241 A CN120312241 A CN 120312241A CN 202510636158 A CN202510636158 A CN 202510636158A CN 120312241 A CN120312241 A CN 120312241A
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- Prior art keywords
- shield
- pipe
- pipeline
- outer shield
- cutter
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Abstract
本发明提供了一种管道更新顶管机及管道更新施工方法，属于隧道掘进设备领域。该管道更新施工方法在设定区段内的旧管道全部破除完毕后将顶管机的内盾以及内盾以内的结构向后回退至始发井内，顶管机的外盾最前端的分盾体在推进装置的顶进下进入到检查井内，将位于检查井内的分盾体拆下，然后将拆下的分盾体由检查井吊出。该管道更新顶管机的外盾包括至少两个分盾体，相邻分盾体之间可拆卸固定连接。本发明中外盾在检查井中被拆除并吊出，被拆除的部分不承担支撑土体的作用，避免外盾拆除对土体稳定的影响。
The present invention provides a pipeline renewal jacking machine and a pipeline renewal construction method, which belong to the field of tunnel excavation equipment. After all the old pipelines in a set section are broken, the pipeline renewal construction method retracts the inner shield of the jacking machine and the structure within the inner shield back into the starting well, and the sub-shield body at the front end of the outer shield of the jacking machine enters the inspection well under the jacking of a propulsion device, and the sub-shield body located in the inspection well is removed, and then the removed sub-shield body is hoisted out of the inspection well. The outer shield of the pipeline renewal jacking machine includes at least two sub-shield bodies, and adjacent sub-shield bodies are detachably fixedly connected. In the present invention, the outer shield is removed and hoisted out in the inspection well, and the removed part does not bear the role of supporting the soil, thereby avoiding the influence of the removal of the outer shield on the stability of the soil.
Description
Technical Field
The invention belongs to the field of tunnel construction, and particularly relates to a pipe-jacking machine for updating a pipe and a pipe-updating construction method.
Background
With the continued development of cities, some old municipal pipelines have failed to meet the current use requirements, and therefore, the old pipelines need to be replaced with new pipelines with larger sizes or better structures. The pipeline is updated in two construction modes, namely open excavation and underground excavation, wherein the construction effect of the open excavation method is larger, so that more pipeline updating is constructed by adopting the underground excavation method at present.
The pipe is updated by the pipe pushing machine, an originating well and a receiving well are respectively built at the head end and the tail end of a section to be updated of the pipe before the pipe is updated by the pipe pushing machine, after the pipe pushing machine is assembled in the originating well, the originating well begins tunneling along the old pipe towards the receiving well, and after the pipe updating task is completed, the pipe pushing machine is disassembled in the receiving well and lifted out of the receiving well. The receiving well needs to be built before the pipeline is updated, and the receiving well needs to have a sufficient size to facilitate the disassembly and the lifting out of the push bench, the construction of the receiving well not only increases the construction cost, but also prolongs the construction period, and meanwhile, due to the complexity of the urban ground building, some positions may not be able to leave enough space to build the receiving well.
At present, the push bench capable of backing back is arranged in the field of tunneling, and can return to the originating well along the original path of the tunneling route after the tunneling task is completed, a receiving well is not required, so that the construction efficiency can be greatly improved, and the construction cost can be reduced.
The Chinese patent application with the application publication number of CN111425213A discloses an in-hole rollback method of a rock pipe jacking machine, in the method, a shield of the pipe jacking machine is divided into an inner shield and an outer shield (namely an outer shield) which are respectively an inner shield and an expanding shield fixed outside the inner shield, a cutter disc is divided into a central block and a side block fixed on the periphery of the central block, after construction is finished, the inner shield and the expanding shield are separated from each other, the central block and the side block of the cutter disc are separated from each other, then a host part with the inner shield and the central block of the cutter disc is dragged back into an originating well by a winch, and the side block and the expanding shield of the cutter disc are detached and transported back into the originating well.
The method can realize the rollback of the pipe pushing machine, but has some problems when the method is applied to the pipeline updating, such as the inner shield and the expanding shield are fixedly connected together in advance, the inner shield and the expanding shield are required to be separated from each other after the pipeline updating is finished and before the rollback, the construction efficiency is low, the expanding shield still supports the position of the inner shield and the part inside the inner shield of the pipe pushing machine after the inner shield and the part inside the inner shield are retracted, the ground collapse risk exists if the expanding shield with the supporting function is directly disassembled, and the efficiency of the expanding shield to be transported back to the originating well along the original path of an insulating route is low because the space inside a new pipeline is limited. In addition, the existing expanding shield of the rollback pipe pushing jack is inconvenient to disassemble and has low disassembling efficiency.
Disclosure of Invention
The invention aims to provide a pipeline updating construction method, which aims to solve the technical problems that when a pipe jacking machine rollback method in the prior art is used for pipeline updating, an outer shield with a supporting function needs to be detached, so that ground collapse is easy to occur, and the efficiency of transporting the outer shield back to an originating well is low.
The invention further aims to provide a pipe-jacking machine with updated pipes, which solves the technical problem that an outer shield is inconvenient to disassemble in the prior art.
In order to achieve the above purpose, the technical scheme of the pipeline updating construction method provided by the invention is as follows:
A pipeline updating construction method includes taking an old pipeline section needing to be updated as a setting section, enabling the tail end of the setting section to be located at an inspection well, arranging an originating well at the head end of the setting section, pushing a new pipeline and a host of a pipe jacking machine forwards by means of a pushing device in the originating well, in-situ breaking the old pipeline in the process of pushing the host and completing pipeline updating, returning an inner shield of the pipe jacking machine and a structure in the inner shield backwards to the originating well after the old pipeline in the setting section is completely broken, enabling a shield body at the foremost end of an outer shield of the pipe jacking machine to enter the inspection well under pushing of the pushing device, removing the shield body located in the inspection well, and then hanging the removed shield body out of the inspection well.
As a further improvement, the shield bodies of the outer shield are arranged along the circumferential direction to form annular joints, after one annular joint of the outer shield is firstly disassembled in the inspection well, the annular joints are continuously disassembled to form shield bodies, and then the shield bodies are hung out of the inspection well one by one.
As a further improvement, the inner shield of the pipe jacking machine and the structure inside the inner shield are retracted backwards to the originating well, and then the shield body of the outer shield is gradually jacked into the inspection well.
As a further improvement, the originating well is retrofitted from an existing manhole.
As a further improvement, the cutter head of the push bench is arranged into two parts, wherein the two parts are a main part positioned in the center and a detachable part positioned at the edge respectively, the detachable part is detached from the main part after the old pipeline in the set section is broken, the detachable part is lifted out of the inspection well after being detached in the inspection well, and the main part is retracted back into the originating well along with the inner shield.
The pipeline updating construction method has the beneficial effects that the pipeline updating construction method is created for the development type invention. According to the method, the pipe is updated by using the pipe push bench, an existing inspection well at the tail end of an old pipe section needing to be updated is used as a space for removing and hanging the outer shield, the removed part of the outer shield does not bear the function of supporting soil, the influence of the outer shield removal on the stability of the soil is avoided, and after the removed part of the outer shield is lifted out of the inspection well, the outer shield can be transported on the ground, so that the outer shield removal and transportation efficiency is effectively improved.
In order to achieve the above purpose, the technical scheme of the pipe-renewing push bench provided by the invention is as follows:
The utility model provides a pipe-jacking machine is updated to pipeline, including the interior shield and the outer shield of nested setting, the outer shield includes two at least shield bodies, can dismantle fixed connection between the adjacent shield body, the shield body includes main part and the connecting plate of setting in main part inboard edge, be provided with on the connecting plate and supply the connecting fastener to install in order to fix the connecting hole together of adjacent shield body, the radial dimension of connecting plate equals the radial distance between main part and the interior shield of outer shield, the inboard edge of jacking in-process connecting plate and interior shield butt and provide the support for interior shield.
As a further improvement, the shield body further comprises a support body fixed on the inner side of the main body part, the radial dimension of the support body is equal to the radial distance between the main body part of the outer shield and the inner shield, and the inner side edge of the support body is abutted against the inner shield and provides support for the inner shield in the jacking process.
As a further improvement, the shield bodies are circumferentially arranged in annular segments, the outer shield comprising at least two axially arranged annular segments, a single annular segment comprising at least two shield bodies.
As a further improvement, the shield body is annular and axially aligned.
As a further improvement, the pipe-jacking machine further comprises a variable-diameter cutter and a cutter driving structure capable of driving the cutter to rotate, wherein the cutter driving structure comprises a planetary gear transmission system, the variable-diameter cutter comprises a main cutter and a planetary cutter, the main cutter is connected with a planet carrier in the planetary gear transmission system, and the planetary cutter is detachably connected with a planetary gear in the planetary gear transmission system.
The pipe-jacking machine has the beneficial effects that the pipe-jacking machine with updated pipes provided by the invention is an improvement on the prior art. The outer shield of the pipe-jacking machine can be disassembled into a plurality of shield bodies, the connecting plates of the shield bodies can not only play a role in connecting adjacent shield bodies together, but also play a role in supporting the inner shield, and the inner side of the shield bodies is in an open state, so that when the inner shield retreats, operators can directly disassemble the outer shield from the inner side of the outer shield, and the operation is convenient.
Drawings
FIG. 1 is a schematic diagram of a tunneling construction process in example 1 of a pipe renewal construction method according to the present invention;
FIG. 2 is a schematic diagram of a rollback preparation procedure in embodiment 1 of a pipeline renewal construction method according to the present invention;
FIG. 3 is a schematic diagram of the inner shield rollback procedure in embodiment 1 of the pipe update construction method according to the present invention;
FIG. 4 is a schematic diagram of the process of removing the outer shield in embodiment 1 of the method for constructing a pipeline renewal according to the present invention;
FIG. 5 is a schematic view of a pipe-push bench according to embodiment 1 of the present invention;
FIG. 6 is a schematic view showing the structure of a tightening device in embodiment 1 of the pipe-push bench according to the present invention;
FIG. 7 is a schematic view showing the structure of the legs of embodiment 1 of the pipe-push bench according to the present invention;
FIG. 8 is a schematic view showing a structure of a planetary gear transmission system in embodiment 1 of a pipe-refreshing push bench according to the present invention;
FIG. 9 is a schematic view of a variable diameter cutterhead in embodiment 1 of a pipe-in-pipe push bench according to the present invention;
fig. 10 is a schematic view of the structure of a shield in embodiment 1 of the pipe-push bench according to the present invention.
Reference numerals illustrate:
1. The device comprises a propulsion device, 2, a shield, 21, an inner shield, 22, an outer shield, 221, a shield body, 2211, a main body, 2212, a connecting plate, 2213, a support body, 2214, a connecting bolt, 23, a ring groove structure, 24, a sealing structure, 3, a main cutter disc, 4, a planetary cutter disc, 5, a screw conveyor, 6, a slag box, 7, a slag discharging pipeline, 8, a fixed frame body, 9, a movable frame body, 10, a telescopic oil cylinder, 11, a tightening oil cylinder, 12, a shoe plate, 13, a supporting leg, 14, a roller, 15, a power source, 16, a planetary gear transmission system, 161, a gear ring, 162, a sun gear, 163, a planetary gear, 17, an old pipeline, 18, a new pipeline, 19, a starting well, 20 and a inspection well.
Detailed Description
The present invention is described in further detail below with reference to examples.
In order to solve the problems in the prior art, the basic idea of the invention is to use the existing inspection well as a space for removing and hanging the outer shield, so as to avoid the collapse of the soil body caused by the loss of support when the outer shield is removed.
The specific embodiment 1 of the pipeline updating construction method provided by the invention comprises the following steps:
In this embodiment, the shield 2 is used for construction of the pipe pushing jack with an inner nested structure, and the cutterhead of the pipe pushing jack needs to include a main portion located at the center and a detachable portion located at the edge, where the radial dimension of the main portion is smaller than or equal to that of the inner shield 21, so that the main portion can retract along with the inner shield 21, and a specific process of updating a pipeline is as follows:
First, construction preparation is performed. Firstly, determining the section of the old pipeline 17 which needs to be updated, taking the section as a set section, starting from the head end of the set section during construction, backing back after jacking to the tail end of the set section, and positioning the tail end of the set section at an inspection well 20 during the set section selection. Secondly, the sewage at both ends of the old pipe 17 needs to be guided so as to facilitate the subsequent operation.
And secondly, working well construction. After the set section is determined, an originating well 19 is built at the head end of the set section. In this embodiment, the originating well 19 is modified from the existing manhole 20, so that the construction amount and the construction cost can be reduced, and therefore, when the setting section is determined in the previous step, the head end of the setting section needs to be located at one manhole 20. In other implementations of the present embodiment, the initiation well 19 may also be constructed separately.
Thirdly, installing tunneling equipment. This step is essentially to suspend the tunnelling equipment into the initiation well 19 and install it. The tunneling equipment comprises a host machine of the push bench and a propelling device 1.
Fourthly, tunneling construction. Before tunneling construction is formally started, the inner shield 21 and the outer shield 22 of the push bench need to be relatively fixed, referring to fig. 1, after tunneling construction is started, a host machine of the push bench is located in front of the pushing device 1, a new pipeline 18 is arranged between the main body of the push bench and the pushing device, and the pushing device enables the host machine of the push bench to advance by pushing the new pipeline 18. The front end of the new pipe 18 is abutted against the outer shield 22, and the new pipe 18 pushes the outer shield 22 to move forwards, and the outer shield 22 and the inner shield 21 are relatively fixed, so that the inner shield 21 and the structure in the inner shield 21 can be carried forward together.
In the forward tunneling process of the pipe jacking machine, the old pipeline 17 is broken in situ by utilizing the rotary cutter head, and meanwhile, the new pipeline 18 replaces the original old pipeline 17, so that the updating of the pipeline is realized.
And fifthly, rollback preparation. After all of the old pipe 17 of the set section is broken, this step is performed. Referring to fig. 2, after the old pipe 17 is completely broken, the front end of the shield 2 of the push bench is inserted into the inspection well 20 at the tail end of the set section, and the cutterhead is completely inserted into the inspection well 20. The operation to be completed in this step is to detach the detachable part on the cutterhead, to lift the detachable part out of the manhole 20, and to cancel the relative fixation of the inner shield 21 and the outer shield 22.
Sixth, the inner shield 21 and the structure within the inner shield 21 are retracted into the originating well 19. Referring to fig. 3, the inner shield 21 and the structure (including the main part of the cutterhead) inside the inner shield 21 can realize backward backspacing by using the traction of the winch, and a specific mode can refer to a backspacing mode in the chinese patent application with application publication number CN111425213a, or can realize backward backspacing by using a stepping mode of the supporting shield, and a specific mode can refer to a backspacing mode in the chinese patent application with application publication number CN114086970 a.
After the inner shield 21 and the structure within the inner shield 21 are retracted into the originating well 19, the disassembly work can be completed within the originating well 19, and finally the components are lifted out of the originating well 19.
Seventh, the outer shield 22 is removed. Referring to fig. 4, after the inner shield 21 and the structure inside the inner shield 21 are retracted, the outer shield 22 of the push bench remains in a section of the set section near the rear end, which section is now supported by the outer shield 22. The pushing device is utilized to continuously push the new pipeline 18, on one hand, the outer shield 22 is pushed into the inspection well 20 so as to facilitate the detachment of the outer end, and on the other hand, the new pipeline 18 is used for supporting the area instead of the outer shield 22, so that the updating of the pipeline is thoroughly completed.
The outer shield 22 positioned in the inspection well 20 does not bear the function of supporting the soil body, so that the outer shield 22 of the part is removed, the soil body is not influenced, and the ground collapse is avoided. And the part of the outer shield 22 is not stressed any more, so that the dismantling operation is easier and more convenient.
Considering that the axial length of the outer shield 22 is long, the space in the manhole 20 cannot allow the outer shield 22 to fully enter the manhole 20, so in this embodiment, the outer shield 22 is provided as a plurality of annular sections which are axially arranged and detachably connected, after the annular section at the forefront of the outer shield 22 fully enters the manhole 20, the annular section is detached and then lifted out, and the operation is repeatedly performed until all the annular sections of the outer shield 22 are lifted out.
The specific embodiment 2 of the pipeline updating construction method provided by the invention comprises the following steps:
Embodiment 1 of the present embodiment based on the pipe renewal construction method is different from embodiment 1 of the pipe renewal construction method in that in this embodiment, a single annular section of the outer shield is set to be at least two segment-shaped shield bodies arranged in a circumferential direction, and in a seventh step, after the single annular section is disassembled, the annular section is disassembled to be the single shield bodies, and then the shield bodies are lifted out of the manhole one by one.
In view of limited space in the inspection well, the annular joint can be inconvenient to integrally hoist, and in view of the fact that part of the wellhead of the inspection well is not opposite to the pipeline, the annular joint can be greatly convenient to transfer and hoist after being decomposed into shield bodies.
The embodiment 3 of the pipeline updating construction method provided by the invention comprises the following steps:
The difference between the embodiment 1 based on the pipe updating construction method and the embodiment 1 of the pipe updating construction method is that the cutter head in the embodiment is a foldable cutter head, the radial dimension of the cutter head is larger in the tunneling process, and the edge of the cutter head is folded inwards before the retraction so as to reduce the radial dimension of the cutter head and facilitate the retraction operation. The cutterhead can be specifically referred to as cutterhead in Chinese patent application with application publication number of CN114086970A, and is not described in detail.
The embodiment 4 of the pipeline updating construction method provided by the invention comprises the following steps:
Embodiment 1 of the present embodiment based on the pipe renewal construction method differs from embodiment 1 of the pipe renewal construction method in that the removal of the outer shield in the present embodiment is different from embodiment 1.
Specifically, in this embodiment, the inner shield and the structure inside the inner shield are retracted backwards for a certain distance, then the retraction is stopped, at this time, the inner shield is completely retracted out of the outer shield, then at least one annular section of the outer shield is completely inserted into the inspection well by pushing up of the pushing device, the outer shield is removed and lifted out of the inspection well according to the operation of the seventh step in embodiment 1, and the inner shield and the structure inside the inner shield are retracted again.
In other implementations of this embodiment, the inner shield may also be retracted by a distance that is less than the distance that the outer shield is completely retracted, and the outer shield is advanced by tightening the pushing device, and after removing and lifting one of the annular sections of the outer shield, the inner shield continues to be retracted, so as to circulate until the outer end is completely removed, and the inner shield is retracted to the originating well.
The invention provides a concrete embodiment 1 of a pipe-updating push bench, which comprises the following steps:
The pipe-renewing push bench is used for implementing the pipe-renewing construction method, and specifically comprises a pushing device 1 and a host, wherein a new pipe 18 is arranged between the host and the pushing device 1 in the pipe-renewing construction process, and the pushing device 1 pushes the host forward by pushing the new pipe 18.
Referring to fig. 5, the main machine includes a shield 2, a variable diameter cutter, and a cutter driving structure and a slag discharging structure disposed in the shield 2. The cutter disc driving structure is used for driving the cutter disc to rotate, the slag discharging structure comprises a screw conveyor 5 and a slag box 6 positioned below the tail end of the screw conveyor 5, slag stones discharged by the screw conveyor 5 can fall into the slag box 6 and temporarily exist in the slag box 6, and the slag box 6 is connected with a slag discharging pipeline 7 capable of discharging the slag stones.
The shield 2 comprises an inner shield 21 and an outer shield 22 which are arranged in a nested mode, and the cutterhead driving structure and the slag discharging structure are arranged on the inner side of the inner shield 21 and can move along with the inner shield 21. The inner shield 21 is of tubular construction, the outer diameter of the inner shield 21 being less than or equal to the inner diameter of the new pipe 18, so that the inner shield 21 can move axially inside the new pipe 18.
The front end of the new pipeline 18 is connected with the outer shield 22, and in the process that the propulsion device 1 forwards pushes the new pipeline 18, the new pipeline 18 applies pushing force to the outer shield 22, a fixed structure is arranged between the inner shield 21 and the outer shield 22, and the fixed structure can simultaneously transmit the forward pushing force to the inner shield 21, so that the inner shield 21 and the outer shield 22 are relatively static and synchronously move forwards.
Specifically, the fixed structure comprises a force transmission frame and a tightening device, wherein the force transmission frame comprises a fixed frame body 8, a movable frame body 9 and a telescopic device connected between the fixed frame body 8 and the movable frame body 9. The fixed frame body 8 is fixedly arranged on the inner side of the rear end of the inner shield 21, the movable frame body 9 is positioned at the rear of the fixed frame body 8, the movable frame body 9 can move back and forth under the driving of a telescopic device, and the telescopic device is specifically a telescopic oil cylinder 10. The movable frame 9 is specifically a beam extending in the front-rear direction.
The tightening device is arranged on the movable frame body 9, and referring to fig. 6, the tightening device comprises four tightening cylinders 11 fixed on the movable frame body 9, piston rods of the tightening cylinders 11 face different directions, arc-shaped shoe plates 12 are arranged at the end parts of the piston rods of the tightening cylinders 11, and when the piston rods of the tightening cylinders 11 extend out, the shoe plates 12 move outwards in the radial direction.
Referring to fig. 7, the movable frame 9 is further provided with supporting legs 13, the lower ends of the supporting legs 13 are provided with rollers 14 capable of rolling on the inner side walls of the new pipes 18, the rollers 14 are arranged in pairs, and the rollers 14 of the same pair are arranged in a splayed shape so as to better adapt to the inner side walls of the new pipes 18 in a round shape. The supporting leg 13 is located at one side of the tightening device far away from the fixed frame 8, and the supporting leg 13 is of a telescopic structure, when the supporting leg 13 is not needed to support the movable frame 9, the supporting leg 13 can be contracted, so that the roller 14 is separated from the inner side wall of the new pipeline 18, and the supporting leg 13 can be an oil cylinder.
In this embodiment, the axial dimensions of the inner shield 21 and the outer shield 22 are the same, and the tightening device is located at the rear of the inner shield 21 and can tighten on the inner side wall surface of the new pipe 18, and since the front end of the new pipe 18 and the front end of the outer shield 22 are tightened, the inner shield 21 and the outer shield 22 can be relatively fixed. When the new pipeline 18 is jacked by the propulsion device 1, the pushing acting force can be simultaneously transmitted to the inner shield 21 and the outer shield 22, and the inner shield 21 and the outer shield 22 synchronously move forwards.
In this embodiment, the fixing structure fixes the inner shield 21 and the outer shield 22 relatively, so as to realize synchronous forward movement of the inner shield 21 and the outer shield 22, and also realize retraction of the inner shield 21. The support legs 13 extend downwards and enable the rollers 14 to be in contact with the inner side wall of the new pipeline 18, the support legs 13 can be used for supporting the rear end of the movable frame body 9, then the supporting devices are retracted, the supporting devices and the new pipeline 18 are not relatively fixed, the supporting legs 13 can support the movable frame body 9, the supporting devices cannot fall down, the telescopic devices are extended, the position of the inner shield 21 cannot change due to the fact that larger friction force exists between the inner shield 21 and the outer shield 22 in the process, the rollers 14 between the support legs 13 and the inner side wall of the new pipeline 18 can reduce friction, the movable frame body 9 can drive the supporting legs 13 and the supporting devices to integrally move backwards, the supporting devices extend again and are supported on the inner side wall of the new pipeline 18, the telescopic devices are shortened, larger static friction force exists between the supporting devices and the new pipeline 18 due to the fact that the supporting devices have larger supporting force on the new pipeline 18 in the process, the inner shield 21 and the outer shield 22 are small in the process, the inner shield 21 can be pulled backwards repeatedly, and the inner shield 21 can be pulled backwards.
Before the inner shield 21 retreats, the diameter of the variable-diameter cutterhead is reduced, and the variable-diameter cutterhead retreats together with the inner shield 21. The variable diameter cutterhead includes a centrally located main portion and a peripherally located removable portion sized to be lifted from the manhole 20 at the end of the set section, such that the removable portion is removed from the manhole 20 before the inner shield 21 is retracted and the main portion of the cutterhead is retracted into the originating well 19 with the inner shield 21.
The cutterhead drive structure includes a power source 15 and a planetary gear transmission system 16. Referring to fig. 8, the planetary gear transmission system 16 includes a ring gear 161, a sun gear 162, a carrier, and a planetary gear 163 located between the ring gear 161 and the sun gear 162, the planetary gear 163 is rotatably mounted on the carrier, and the planetary gear 163 is engaged with both the ring gear 161 and the sun gear 162. In this embodiment, the ring gear 161 is fixed to the inner side of the inner shield 21, the rotation driving force output by the power source 15 acts on the sun gear 162, the sun gear 162 rotates to drive the planetary gear 163 to revolve around the sun gear 162, and the ring gear 161 is fixed, so that the planetary gear 163 rotates in the revolution process, and the revolution of the planetary gear 163 can drive the planet carrier to rotate.
Referring to fig. 5 in combination with fig. 9, the variable diameter cutterhead specifically includes a main cutterhead 3 and a planetary cutterhead 4, wherein the main cutterhead 3 is mounted on a planet carrier and can rotate under the drive of the planet carrier, and the planetary cutterhead 4 is in transmission connection with a planetary gear 163 and can revolve around the main cutterhead 3 under the drive of the planetary gear 163 and rotate. In this embodiment, the main cutter 3 forms the main part of the cutter, the planetary cutter 4 forms the detachable part of the cutter, and the planetary cutter 4 can be detached when necessary.
In the normal tunneling process, the pipe jacking machine is provided with the planetary cutterhead 4, the planetary cutterhead 4 can enlarge the excavation section, and the size of the excavation section is ensured to be larger than or equal to the outer diameter of the outer shield 22 and the outer diameter of the new pipeline 18, so that the replacement of the old pipeline 17 by the new pipeline 18 can be successfully completed. After tunneling is completed, the planetary cutterhead 4 needs to be detached, then the planetary cutterhead 4 is lifted out of the manhole 20, and the inner shield 21 is retracted. The diameter of the main cutterhead 3 is smaller than or equal to the outer diameter of the inner shield 21, so that the inner shield 21 can be retracted together with the main cutterhead 3.
The outer shield 22 comprises at least two annular sections arranged along the axial direction, wherein adjacent annular sections are detachably and fixedly connected, and each annular section comprises at least two circumferentially arranged shield bodies 221, and the adjacent two shield bodies 221 in the same annular section are detachably and fixedly connected, as shown in fig. 10. In the process of removing the shield 22, the whole annular section can be lifted out of the inspection well 20, or the shield bodies 221 can be lifted out of the inspection well 20 one by one after the annular section is disassembled into the individual shield bodies 221.
The shield body 221 includes a tubular main body portion 2211 and a connection plate 2212 fixed to the inner side of the axial and circumferential end portions of the main body portion 2211, and the connection plate 2212 is provided with a connection hole through which a connection fastener, specifically a connection bolt 2214 in this embodiment, is passed. The connection plates 2212 inside the circumferential end parts of the shield bodies 221 are used for realizing the connection of two adjacent shield bodies 221 in the same annular joint, and the connection plates 2212 inside the axial end parts of the shield bodies 221 are used for realizing the connection of different annular joints but adjacent shield bodies 221. The operator can disassemble and assemble the shield 22 from the inner side, and the operation is convenient.
The radial dimension of the connection plate 2212 on the shield body 221 is equal to the radial distance between the main body portion 2211 of the outer shield 22 and the inner shield 21, so that the inner edge of the connection plate 2212 can be abutted with the outer peripheral wall surface of the inner shield 21 in the tunneling process, and support is provided for the inner shield 21. Because the inner shield 21 and the structure inside the inner shield 21 are heavy, in order to avoid crushing the outer shield 22, a supporting body 2213 is further arranged on each shield body 221 of the outer shield 22, the supporting body 2213 is fixed on the inner side of the main body portion 2211 of the shield body 221, and the radial dimension of the supporting body 2213 is equal to the radial distance between the main body portion 2211 of the outer shield 22 and the inner shield 21, so that the inner side edge of the supporting body 2213 can be abutted against the outer peripheral wall surface of the inner shield 21 in the tunneling process, thereby providing support for the inner shield 21. After the support body 2213 is arranged, not only is the inner shield 21 better supported, but also the structural strength of the outer shield 22 is enhanced, and the deformation is not easy to be unstable.
A sealing gasket is arranged between two axially adjacent and circumferentially adjacent shield bodies 221, and after the outer shield 22 is assembled, the sealing gasket can play a sealing role between the adjacent shield bodies 221 to prevent water and dregs in the tunneling process from entering between the outer shield 22 and the inner shield 21. A sealing structure 24 is arranged between the annular section at the forefront end of the outer shield 22 and the inner shield 21 so as to prevent water and dregs from entering between the outer shield 22 and the inner shield 21 in the tunneling process. The sealing structure 24 may be a welded structure, that is, the annular joint at the foremost end of the outer shield 22 and the inner shield 21 are directly welded together to realize sealing, and the sealing structure 24 may also be sealant, specifically, the sealant may be smeared between the inner edge of the front connecting plate 2212 of the annular joint at the foremost end of the outer shield 22 and the inner shield 21.
In order to ensure reliable connection between the shield 2 and the new pipe 18, the rear end of the shield 2 is in socket fit with the new pipe 18, specifically, the rear connection plate 2212 of the ring of shield bodies 221 at the rearmost end of the shield 2 is arranged at the front, so that the tail end of the shield 2 forms an annular groove structure 23, the front end of the new pipe 18 is embedded into the annular groove structure 23, the outer peripheral surface of the new pipe 18 is aligned with the outer peripheral surface of the outer shield 22, and therefore, a groove for embedding the rear end of the main body 2211 of the ring of shield bodies 221 at the rearmost end of the outer shield 22 is also arranged at the outer side of the front end of the new pipe 18.
The invention provides a concrete embodiment 2 of a pipe-updating push bench, which comprises the following steps:
The embodiment 1 based on the pipe-updating push bench differs from the embodiment 1 of the pipe-updating push bench in that in the embodiment, the outer diameter of the inner shield is smaller than the inner diameter of the new pipe, the inner side of the rear end of the outer shield is provided with a backward extending extension plate, the extension plate is located on the inner side of the new pipe, and the tightening device in the embodiment can be directly tightened on the extension plate of the outer shield, so that more reliable synchronism exists between the inner shield and the outer shield.
The invention provides a concrete embodiment 3 of a pipe-updating push bench, which comprises the following steps:
The embodiment 1 of the pipe-renewal push bench according to the present embodiment is different from the embodiment 1 of the pipe-renewal push bench according to the present embodiment in that the variable-diameter cutterhead includes a main cutterhead and a side block fixedly installed at the edge of the main cutterhead, and the cutterhead driving structure directly drives the main cutterhead to rotate, and the side block rotates together with the main cutterhead. Before the inner shield retreats, the edge blocks are detached from the main cutterhead and lifted out of the inspection shaft. The structure of the variable diameter cutterhead in this embodiment can refer to the cutterhead in the chinese patent application with publication number CN111425213 a.
The invention provides a concrete embodiment 4 of a pipe-updating push bench, which comprises the following steps:
The difference between the embodiment 1 of the pipe-push bench based on the pipe-update and the embodiment 1 of the pipe-push bench based on the pipe-update is that the diameter-variable cutterhead in the embodiment is a folding structure, the edge of the cutterhead can be folded inwards to reduce the diameter of the cutterhead, and the structure of the diameter-variable cutterhead in the embodiment can refer to the cutterhead in the Chinese patent application with the application publication number of CN 114086970A.
The embodiment 5 of the pipe-refreshing push bench provided by the invention comprises the following components:
The embodiment is based on the concrete embodiment 1 of the pipe-renewal push bench, and is different from the concrete embodiment 1 of the pipe-renewal push bench in that the force transmission frame only comprises a fixed frame body, but no movable frame body and telescopic device are arranged, and the tightening device is arranged at the rear side of the fixed frame body. The fixing structure in the embodiment is only used for keeping the inner shield and the outer shield relatively fixed in the forward tunneling process of the pipe jacking machine, and is not used for providing power for the rollback of the inner shield. In this embodiment, the inner shield realizes rollback by pulling of the winch, and will not be described again.
The invention provides a concrete embodiment 6 of a pipe-updating push bench, which comprises the following steps:
the embodiment is based on the concrete embodiment 1 of the pipe-renewal push bench, and is different from the concrete embodiment 1 of the pipe-renewal push bench in that the fixing structure in the embodiment comprises a fixing bolt installed between an inner shield and an outer shield.
Specifically, a through hole for the fixing bolt to pass through can be formed in the inner shield, and a fixing nut matched with the fixing bolt is welded and fixed on the outer shield, so that the inner shield and the outer shield are mutually fixed by the fixing bolt in the tunneling process, and the fixing bolt is detached before retreating, so that the fixation release of the inner shield and the outer shield is realized.
The invention provides a concrete embodiment 7 of a pipe-updating push bench, which comprises the following steps:
The embodiment 1 of the pipe-push bench based on the pipe update differs from the embodiment 1 of the pipe-push bench based on the pipe update in that the ring-shaped section of the outer shield in the embodiment is of an integral structure and cannot be split into a plurality of shield bodies, and the ring-shaped section of the outer shield is integrally lifted out of the inspection well in the outer shield dismantling process.
The invention provides a concrete embodiment 8 of a pipe-updating push bench, which comprises the following steps:
The embodiment is based on the concrete embodiment 1 of the pipe-renewal push bench, and is different from the concrete embodiment 1 of the pipe-renewal push bench in that the whole shield body in the embodiment is a closed hollow structure in a segment shape, the inner side of the shield body is provided with a threaded hole, the corresponding position on the inner shield is provided with a through hole for a fixing bolt to pass through, and the fixing bolt passes through the through hole and is filled into the threaded hole, so that the fixation of the inner shield and the outer shield is realized, and the assembly of each shield body is also realized.
Before the inner shield retreats, the fixing bolts are removed, so that all the shield bodies are not connected with each other any more, and the embodiment is suitable for the pipeline updating construction method in the concrete embodiment 4 of the pipeline updating construction method.
The invention provides a concrete embodiment 9 of a pipe-updating push bench, which comprises the following steps:
The difference between the embodiment 1 of the pipe-renewal push bench and the embodiment 1 of the pipe-renewal push bench is that the radial dimension of the connecting plate in the embodiment is smaller than the distance between the main body part and the inner shield, and the connecting plate is only used for connecting adjacent shield bodies, but not used for supporting the inner shield, and the inner shield is completely supported by the supporting body.
The invention provides a concrete embodiment 10 of a pipe-refreshing push bench, which comprises the following steps:
The embodiment is based on the concrete embodiment 1 of the pipe-renewal push bench, and is different from the concrete embodiment 1 of the pipe-renewal push bench in that the embodiment does not provide a supporting body, and the inner shield is supported by the connecting plate.
The invention provides a concrete embodiment 11 of a pipe-refreshing push bench, which comprises the following steps:
The embodiment 1 of the pipe-renewal push bench is different from the embodiment 1 of the pipe-renewal push bench in that no supporting leg is arranged in the embodiment, the lower supporting cylinder of the supporting device is not retracted, and the lower supporting cylinder is used for supporting the movable frame body.
The invention provides a concrete embodiment 12 of a pipe-updating push bench, which comprises the following steps:
The embodiment 1 of the pipe-push bench based on the pipe-update differs from the embodiment 1 of the pipe-push bench based on the pipe-update in that the supporting legs in the embodiment are of non-telescopic structures, and are always supported on the inner side walls of new pipes in the tunneling process.
It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present invention, and the present invention is not limited to the above-mentioned embodiments, but may be modified without inventive effort or equivalent substitution of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A pipeline updating construction method is characterized in that an old pipeline section needing to be updated is taken as a setting section, the tail end of the setting section is located at an inspection well, an originating well is arranged at the head end of the setting section, a propelling device in the originating well is utilized to push a new pipeline and a host of a pipe pusher forward, the old pipeline is broken in situ in the process of pushing the host, pipeline updating is completed at the same time, after the old pipeline in the setting section is completely broken, an inner shield of the pipe pusher and a structure in the inner shield are retracted backwards into the originating well, a shield body at the foremost end of an outer shield of the pipe pusher enters the inspection well under pushing of the propelling device, the shield body located in the inspection well is detached, and then the detached shield body is lifted out of the inspection well.
2. The pipe renewal construction method according to claim 1, wherein the shield bodies of the outer shield are arranged in a circumferential direction to form annular sections, and after one annular section of the outer shield is removed in the manhole, the annular section is continued to be removed into shield bodies, and then the shield bodies are lifted out of the manhole one by one.
3. The pipe renewal construction method according to claim 1 or 2, wherein the inner shield of the push bench and the structure inside the inner shield are retracted back to the originating well, and then the shield body of the outer shield is successively pushed into the inspection well.
4. A method of pipe renewal construction according to claim 1 or 2, wherein the originating well is retrofitted from an existing manhole.
5. The pipe renewing construction method according to claim 1 or 2, wherein the cutterhead of the push bench is provided with two parts, namely a main part positioned in the center and a detachable part positioned at the edge, the detachable part is detached from the main part after the old pipe in the set section is broken, the detachable part is lifted out of the inspection well after being detached in the inspection well, and the main part is retracted back into the originating well along with the inner shield.
6. The utility model provides a pipe-jacking machine is updated to pipeline, including the interior shield and the outer shield of nested setting, characterized by, the outer shield includes two at least shield bodies, can dismantle fixed connection between the adjacent shield body, the shield body includes main part and the connecting plate of setting in main part inboard edge, be provided with on the connecting plate and supply the connecting fastener to install in order to fix the connecting hole together adjacent shield body, the radial dimension of connecting plate equals the radial distance between main part and the interior shield of outer shield, the inboard edge of in-process connecting plate and interior shield butt provide support for interior shield.
7. The pipe-in-one push bench of claim 6, wherein the shield body further comprises a support body fixed on the inner side of the main body part, the radial dimension of the support body is equal to the radial distance between the main body part of the outer shield and the inner shield, and the inner side edge of the support body is abutted against the inner shield and provides support for the inner shield during pushing.
8. The pipe-refreshing push bench according to claim 6 or 7, wherein the shield bodies are circumferentially arranged in annular sections, the outer shield comprises at least two axially arranged annular sections, and a single annular section comprises at least two shield bodies.
9. The pipe-refreshing push bench according to claim 6 or 7, wherein the shield bodies are annular and axially arranged.
10. The pipe-refreshing push bench according to claim 6 or 7, wherein the pipe-refreshing push bench further comprises a variable-diameter cutter and a cutter driving structure capable of driving the cutter to rotate, the cutter driving structure comprises a planetary gear transmission system, the variable-diameter cutter comprises a main cutter and a planetary cutter, the main cutter is connected with a planet carrier in the planetary gear transmission system, and the planetary cutter is detachably connected with a planetary gear in the planetary gear transmission system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510636158.6A CN120312241A (en) | 2025-05-16 | 2025-05-16 | A pipeline renewal pipe jacking machine and pipeline renewal construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510636158.6A CN120312241A (en) | 2025-05-16 | 2025-05-16 | A pipeline renewal pipe jacking machine and pipeline renewal construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN120312241A true CN120312241A (en) | 2025-07-15 |
Family
ID=96327884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202510636158.6A Pending CN120312241A (en) | 2025-05-16 | 2025-05-16 | A pipeline renewal pipe jacking machine and pipeline renewal construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN120312241A (en) |
-
2025
- 2025-05-16 CN CN202510636158.6A patent/CN120312241A/en active Pending
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