Pipe renewal construction apparatus and method

Abstract

The application provides a pipeline updating construction equipment and method, and belongs to the field of tunneling. The pipeline updating construction equipment comprises a front shield, a containing space for containing an old pipe section is arranged in the front shield, and a lifting outlet for lifting out the old pipe section is arranged at the top of the containing space. The pipeline updating construction method is as follows: the soil in front of the front shield is excavated to expose the old pipeline, then the front shield and the tail shield move forward, in this process, the old pipe section at the tail end of the old pipeline enters the containing space, the old pipe section is lifted out by a crane and a new pipe section is lifted into the assembling space, after the new pipe section is assembled, the above process is repeated until the updating of the old pipeline is completed. The containing space for containing the old pipe section is arranged on the front shield, so that the exposed old pipeline during excavation can enter the containing space immediately after the front shield moves forward, the old pipeline can be lifted out, and the application can be applied to the updating construction of the old pipeline.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of tunneling, in particular relates to a pipeline updating construction equipment and method. BACKGROUND

[0002] The shallow buried pipeline is generally laid by open cut method, and the open cut method needs to slope and support the construction trench to prevent collapse, so the construction influence range is large, and the construction efficiency is low, which cannot meet the construction period requirement.

[0003] The existing Chinese patent application with the application publication number CN118008333A and the application publication date of May 10, 2024 discloses a U-shaped shield machine, which comprises a front shield body, a middle shield body and a tail shield body, a waterproof plug knife assembly is arranged on the front shield body, a closing partition plate for blocking the front shield body is further arranged in the front shield body, a hinged sealing structure is arranged at the connecting position of the front shield body and the middle shield body, so that the front shield body and the middle shield body can relatively deflect while maintaining good sealing, the middle shield body and the tail shield body are integrally connected, a jacking system for driving the whole U-shaped shield machine to move forward by jacking the pipeline is arranged in the middle shield body, and a sealing brush assembly is arranged on the inner side of the tail shield body to ensure good sealing between the tail shield body and the outer wall of the pipeline. The closing partition plate is arranged at a position close to the front end of the front shield body, the lower end of the closing partition plate is provided with an inclined plug plate, the lower end of the plug plate is located at the front end of the bottom plate of the front shield body, and an inclined plug knife for controlling the overbreak amount is arranged below the plug plate.

[0004] The above-mentioned U-shaped shield machine can effectively reduce the construction process and improve the construction efficiency during construction, and since the left and right sides of the trench do not need to be sloped, the influence on the surrounding environment is also small.

[0005] However, in some areas, some pipelines need to be replaced with new pipelines after being removed due to insufficient design capacity or aging and damage, but the existing U-shaped shield machine is only suitable for laying new pipelines and cannot simultaneously perform the operations of removing old pipelines and laying new pipelines, so a pipeline updating construction equipment capable of updating old pipelines needs to be designed. SUMMARY

[0006] One of the purposes of the present application is to provide a pipeline updating construction method to solve the technical problem that there is no equipment capable of being used for old pipeline updating construction in the prior art.

[0007] One of the purposes of the present application is to provide a pipeline updating construction equipment to solve the above-mentioned technical problem.

[0008] To achieve the above object, the technical scheme of the pipeline renewal construction method provided by the present application is:

[0009] The pipeline renewal construction method comprises the following steps: firstly, the soil in front of the front shield is excavated to expose the old pipeline; then, the front shield and the tail shield move forward; in this process, the old pipe joint at the end of the old pipeline gradually enters the accommodation space in the front shield, and the new pipe joint at the head of the new pipeline gradually exits the assembling space in the tail shield; when the old pipe joint at the end of the old pipeline completely enters the accommodation space, the old pipe joint is lifted out of the accommodation space by a crane, and the new pipe joint is lifted into the assembling space; after the new pipe joint is assembled, the above process is repeated until the renewal of the old pipeline is completed.

[0010] The pipeline renewal construction method provided by the present application belongs to the development type invention. The pipeline renewal construction method is mainly used in the construction of the renewal of the old pipeline. After the old pipe joint is exposed by excavation, the front shield moves forward to make the old pipe joint enter the accommodation space, and the new pipe joint exits the assembling space to leave space for the assembly of the next new pipe joint. The old pipe joint can be lifted out of the accommodation space through the lifting outlet, the new pipe joint can be lifted into the assembling space through the lifting inlet, and then the next cycle can be entered to continuously remove the old pipe joint and continuously lay the new pipe joint.

[0011] To achieve the above object, the technical scheme of the pipeline renewal construction method provided by the present application is:

[0012] The pipeline renewal construction device comprises a front shield and a jacking mechanism for driving the front shield to move forward. An accommodation space for accommodating the old pipe joint is arranged in the front shield. A lifting outlet for lifting the old pipe joint is arranged at the top of the accommodation space. The side walls of the front shield at the position of the accommodation space form support side walls for supporting the trench wall corresponding to the position of the exposed old pipe joint.

[0013] As a further improvement, the front part of the front shield is provided with a front slag blocking structure. The accommodation space is located behind the front slag blocking structure. The front shield is provided with a first through hole at the front slag blocking structure for the old pipe joint to pass from front to back and enter the accommodation space.

[0014] As a further improvement, the front slag blocking structure is a front baffle arranged in the front shield. The first through hole is arranged on the front baffle and located at the lower part of the front baffle.

[0015] As a further improvement, a first sealing structure is arranged in the first through hole for forming a seal between the first through hole and the old pipe joint.

[0016] As a further improvement, the pipeline renewal construction equipment further comprises a tail shield located behind the front shield, a rear slag blocking structure is arranged at the rear of the tail shield, a assembling space for assembling new pipe sections is arranged in front of the rear slag blocking structure in the tail shield, a lifting inlet for lifting the new pipe sections into the assembling space is arranged at the top of the assembling space, and a second through hole for the new pipe sections to pass from front to rear and in communication with the assembling space is arranged at the rear slag blocking structure of the tail shield.

[0017] As a further improvement, a second sealing structure for forming a seal between the second through hole and the new pipe sections is arranged in the second through hole.

[0018] As a further improvement, the rear slag blocking structure is a rear baffle arranged in the tail shield, and the second through hole is arranged on the rear baffle and located at the lower part of the rear baffle.

[0019] As a further improvement, a flow channel for the fluid medium discharged from the old pipeline to flow into the new pipeline is arranged between the containing space and the assembling space.

[0020] As a further improvement, the pipeline renewal construction equipment further comprises a tail shield located behind the front shield, a rear slag blocking structure is arranged at the rear of the tail shield, a assembling space for assembling new pipe sections is arranged in front of the rear slag blocking structure in the tail shield, a lifting inlet for lifting the new pipe sections into the assembling space is arranged at the top of the assembling space, and a second through hole for the new pipe sections to pass from front to rear and in communication with the assembling space is arranged at the rear slag blocking structure of the tail shield, a second sealing structure for forming a seal between the second through hole and the new pipe sections is arranged in the second through hole, and a flow channel for the fluid medium discharged from the old pipeline to flow into the new pipeline is arranged between the containing space and the assembling space.

[0021] As a further improvement, the front shield comprises a front shield bottom plate and front shield side plates located on both sides of the front shield bottom plate, the front shield side plates form the supporting side walls, and a soil discharging structure for discharging the slag soil under the old pipeline to the side of the old pipeline is arranged at the front end of the front shield bottom plate.

[0022] As a further improvement, the soil discharging structure comprises a protruding part protruding forward from the front end wall of the front shield bottom plate, and inclined walls are arranged on both sides of the protruding part, and the front ends of the two inclined walls intersect.

[0023] As a further improvement, a grouting channel for injecting concrete slurry under the new pipe sections to lay a cushion layer is arranged on the rear baffle and located below the second through hole.

[0024] As a further improvement, the pipeline renewal construction equipment further comprises a crane for lifting the old pipe sections and the new pipe sections, and a tail shield located behind the front shield, and the crane is installed at the rear of the front shield or the front of the tail shield.

[0025] The beneficial effect is that the pipeline updating construction equipment belongs to an open-type invention and creation, and is mainly used for updating old pipelines, and the front shield can be moved forward to make the old pipe joint enter the accommodating space immediately, the front shield has a supporting side wall which can support the trench wall corresponding to the position of the exposed old pipe joint, and the construction safety is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a sectional view of the pipeline updating construction equipment side view angle in an embodiment of the pipeline updating construction equipment of the present application.

[0027] Figure 2 It is a top view of the pipeline updating construction equipment in an embodiment of the pipeline updating construction equipment of the present application.

[0028] Figure 3 It is a structure schematic view of the pipeline updating construction equipment front view angle in an embodiment of the pipeline updating construction equipment of the present application.

[0029] Figure 4 It is a structure schematic view of the pipeline updating construction equipment rear view angle in an embodiment of the pipeline updating construction equipment of the present application.

[0030] Figure 5 It is a process schematic view of the pipeline updating construction equipment trench digging in an embodiment of the pipeline updating construction equipment of the present application.

[0031] Figure 6 It is a process schematic view of the pipeline updating construction equipment forward movement in an embodiment of the pipeline updating construction equipment of the present application.

[0032] Figure 7 It is a state schematic view of the pipeline updating construction equipment when the old pipe joint completely enters the accommodating space in an embodiment of the pipeline updating construction equipment of the present application.

[0033] Figure 8 It is a process schematic view of the pipeline updating construction equipment old pipe joint lifting in an embodiment of the pipeline updating construction equipment of the present application.

[0034] Figure 9 It is a process schematic view of the pipeline updating construction equipment new pipe joint lifting in an embodiment of the pipeline updating construction equipment of the present application.

[0035] Figure 10 It is a process schematic view of the pipeline updating construction equipment after the new pipe joint lifting in an embodiment of the pipeline updating construction equipment of the present application.

[0036] Figure 11Structure diagram of an embodiment of the pipeline renewal construction equipment without a front baffle;

[0037] Figure 12 Structure diagram of an embodiment of the pipeline renewal construction equipment when the cross section of the old pipeline is rectangular.

[0038] Explanation of reference signs:

[0039] 1, front shield; 101, front shield side plate; 102, front shield bottom plate; 103, side edge insert; 104, bottom insert; 2, tail shield; 201, tail shield bottom plate; 202, tail shield side plate; 3, connecting structure; 4, front baffle; 5, first through hole; 6, first sealing structure; 7, rear baffle; 8, second through hole; 9, second sealing structure; 10, crane; 11, jacking mechanism; 12, protrusion; 13, inclined wall; 14, grouting channel; 15, cushion layer; 16, soil body; 17, new pipe section; 18, old pipe section; 19, backfill layer; 20, partition plate; 21, flow channel. DETAILED DESCRIPTION

[0040] The application will be further described in detail below in combination with embodiments.

[0041] To solve the problems in the prior art, the basic idea of the application is to set an accommodation space for accommodating the old pipe section on the front shield, so that the exposed old pipeline can enter the accommodation space immediately after the front shield moves forward, the front shield has a supporting side wall that can support the trench wall corresponding to the position of the exposed old pipe section, ensuring construction safety, and the old pipe section can be lifted out of the accommodation space through the lifting port after being removed.

[0042] The pipeline renewal construction equipment provided by the application has the following specific embodiments:

[0043] A pipeline renewal construction equipment, as shown in the accompanying drawings Figure 1 , the accompanying drawings Figure 2 , and the accompanying drawings Figure 3 , comprises a front shield 1 and a tail shield 2, the cross-sectional shape of the front shield 1 and the tail shield 2 is U-shaped, and a connecting structure 3 is arranged between the front shield 1 and the tail shield 2, which is in the same form as the hinge sealing structure in the Chinese invention patent application CN118008333A, can play a sealing and connecting role between the front shield 1 and the tail shield 2, and can also make the front shield 1 and the tail shield 2 relatively deflect to facilitate turning, which will not be described here.

[0044] The front shield 1 comprises a front shield bottom plate 102 and front shield side plates 101 located on both sides of the front shield bottom plate 102, and the front ends (i.e. the ends facing the tunneling direction) of the front shield side plates 101 are provided with a plurality of side edge cutters 103 in a stepped manner, which can reshape the two side walls of the trench and also provide timely support during the process of the excavator performing advanced excavation. The arrangement of the side edge cutters 103 is a prior art and will not be described here.

[0045] The front shield 1 further comprises a front slag blocking structure arranged at the front part thereof, and the front shield 1 is provided with a containing space behind the front slag blocking structure for containing the old pipe section 18. In the present embodiment, the front slag blocking structure is a front baffle plate 4 for preventing the slag from entering the containing space. The lower end of the front baffle plate 4 is fixedly connected to the upper side wall of the front end of the front shield bottom plate 102, and the left and right ends of the front baffle plate 4 are fixedly connected to the inner walls of the two front shield side plates 101. The lower part of the front baffle plate 4 is provided with a first passing hole 5, and the diameter of the first passing hole 5 is matched with the outer diameter of the old pipe section 18, so that the old pipe section 18 exposed by excavation can pass through the first passing hole 5 and enter the rear of the front baffle plate 4. The rear side wall of the front baffle plate 4 and the space surrounded by the inner walls of the two front shield side plates 101 form the containing space, and the top of the containing space is an open structure, which forms a lifting outlet for lifting the old pipe section 18 out of the containing space upward.

[0046] The tail shield 2 comprises a tail shield bottom plate 201 and tail shield side plates 202 located on both sides of the tail shield bottom plate 201, and the tail shield 2 further comprises a rear slag blocking structure arranged at the rear part thereof, and the tail shield 2 is provided with an assembling space in front of the rear slag blocking structure for assembling the new pipe section 17. In the present embodiment, the rear slag blocking structure is a rear baffle plate 7 for preventing the slag from entering the assembling space. The lower end of the rear baffle plate 7 is fixedly connected to the upper side wall of the rear end of the tail shield bottom plate 201, and the left and right ends of the rear baffle plate 7 are fixedly connected to the inner walls of the two tail shield side plates 202. The lower part of the rear baffle plate 7 is provided with a second passing hole 8, and the diameter of the second passing hole 8 is matched with the outer diameter of the new pipe section 17, so that the assembled new pipe section 17 can pass through the second passing hole 8 and enter the rear of the rear baffle plate 7. The front side wall of the rear baffle plate 7 and the space surrounded by the inner walls of the two front shield side plates 101 form the assembling space, and the top of the assembling space is also an open structure, which forms a lifting inlet for lifting the new pipe section 17 into the assembling space from top to bottom.

[0047] A crane 10 is fixedly installed at the front part of the tail shield 2 to perform lifting and transporting operations on the old pipe section 18 and the new pipe section 17. In other embodiments, the crane 10 can also be installed at the rear part of the front shield 1, or an independent crane 10 can be used.

[0048] The tail shield 2 is provided with a pushing mechanism 11, which comprises a pushing piece and pushing oil cylinders arranged on the left and right sides of the pushing piece. In use, the pushing piece abuts against the front end wall of the new pipe section 17, and the pushing oil cylinders are extended to push the tail shield 2 and the front shield 1 to move forward (i.e. in the tunneling direction). There are four pushing oil cylinders, and two pushing oil cylinders are arranged on each side of the pushing piece in the left-right direction.

[0049] The piston rod of the pushing oil cylinder faces forward and is hinged to the tail shield 2. The cylinder body of the pushing oil cylinder is provided with at least two matching parts arranged in the axial direction. The pushing piece is provided with a connecting part for detachable connection with the matching parts. When the new pipe section 17 is assembled, the pushing oil cylinder is in a shortened state, and the connecting part is detachably connected with the most forward matching part to leave more space in the assembly space for the assembly of the new pipe section 17. The assembly of the new pipe section 17 is carried out between the two pushing oil cylinders. After the new pipe section 17 is assembled, the pushing oil cylinder is extended to push the tail shield 2 and the front shield 1 to move forward by a distance, and then the pushing oil cylinder is shortened. At this time, a larger space is left between the pushing piece and the front end of the new pipe section 17. Then, the pushing piece is moved backward to the second matching part, the pushing oil cylinder is re-extended, and the tail shield 2 and the front shield 1 are continuously pushed to move forward by a distance.

[0050] The connecting part can be a clamping groove arranged on the cylinder body of the oil cylinder, and the matching part can be a clamping block fixedly arranged on the pushing piece. When the connecting part is matched with the matching part, the clamping block is embedded in the clamping groove to transmit force between the pushing oil cylinder and the pushing piece.

[0051] The first through hole 5 is provided with a first sealing structure 6 for forming a seal between the inner wall of the first through hole 5 and the outer wall of the old pipe section 18. The second through hole 8 is provided with a second sealing structure 9 for forming a seal between the inner wall of the second through hole 8 and the outer wall of the new pipe section 17. In order to ensure wear resistance, the first sealing structure 6 and the second sealing structure 9 each comprise two or three steel plate brushes, and sealing grease is filled between the adjacent two steel plate brushes.

[0052] The front baffle 4 and the rear baffle 7 are each provided with a thickened part, and the first through hole 5 and the second through hole 8 are arranged at the corresponding thickened parts, so that the first through hole 5 has sufficient length in the extension direction to arrange the first sealing structure 6, and the second through hole 8 has sufficient length in the extension direction to arrange the second sealing structure 9.

[0053] The front end of the front shield bottom plate 102 is provided with a soil discharge structure for discharging the muck below the old pipe to the side of the old pipe. Figure 3The soil removal structure comprises a protruding portion 12 protruding forward from the front end wall of the front shield bottom plate 102, and the left and right sides of the protruding portion 12 are respectively provided with an inclined wall 13. The front ends of the two inclined walls 13 intersect to form a wedge-shaped structure, and the edge formed by the intersection of the front ends of the two inclined walls 13 extends in the vertical direction. During the forward movement of the front shield 1, the muck under the old pipeline will be pushed to the left and right sides of the old pipeline by the inclined wall 13 of the protruding portion 12, so as to facilitate the use of the excavator to dig out the muck, thereby reducing the construction difficulty. The front ends of the two inclined walls 13 of the soil removal structure intersect to form a wedge-shaped structure, so as to respectively remove the muck under the old pipeline to the left and right sides, thereby improving the removal effect, and the edge formed by the intersection of the front ends of the two inclined walls 13 needs to be located directly below the old pipeline.

[0054] Referring to the accompanying drawings Figure 4 The rear baffle 7 is provided with a grouting channel 14 for injecting concrete slurry under the new pipe section 17 to lay the cushion layer 15, and the grouting channel 14 is located below the second through hole 8. Specifically, the rear baffle 7 is provided with four guide pipes penetratingly arranged below the second through hole 8, the guide pipes are arranged in the left-right direction of the tail shield 2, the guide pipes constitute the grouting channel 14, the front ends of the guide pipes are connected with grouting pipes, and the grouting pipes are used to provide concrete slurry. In other embodiments, a through hole can also be formed in the rear baffle, and the through hole constitutes the grouting channel, and the front end of the through hole is connected with the grouting pipe. During the laying of the new pipeline, the grouting channel 14 can directly inject grouting to the lower side of the new pipeline to lay the cushion layer 15, thereby improving the stability of the new pipeline. In other embodiments, the cushion layer 15 can also be manually poured, and in this embodiment, the backfill muck needs to be filled after the manual pouring of the cushion layer 15.

[0055] The specific method for updating the old pipeline is described below with reference to the accompanying drawings Figure 5 Firstly, a trench is excavated in front of the front shield 1 by using an excavator, and the side cutting knife 103 is extended forward to shape the side wall of the trench during the excavation, and the excavated position is supported in time. After the excavator excavates one end, referring to the accompanying drawings Figure 6 The thrust oil cylinder of the thrust mechanism 11 is elongated to drive the front shield 1 and the tail shield 2 to move forward together, and the front shield 1 moves forward in the excavated trench. During the excavation, the old pipe section 18 will be exposed from the soil body 16, and with the forward movement of the front shield 1, the old pipe section 18 passes through the first through hole 5 and enters the containing space.

[0056] Referring to the accompanying drawings Figure 7 When one complete old pipe section 18 enters the containing space, the front shield 1 and the tail shield 2 stop moving forward, referring to the accompanying drawings Figure 8 Then, the old pipe section 18 is lifted out of the containing space by using the crane 10 through the lifting outlet. After the old pipe section 18 completely located in the containing space is lifted out, the tail end of the old pipeline composed of the old pipe section 18 is located in the containing space.

[0057] See appendix Figure 9 The jacking cylinder in the jacking mechanism 11 is shortened to create assembly space. The front end of the new pipeline, consisting of the new pipe section 17, remains within the assembly space. Then, the crane 10 lifts a new pipe section 17 through the lifting inlet into the assembly space, where it is then assembled with the new pipeline. After the new pipe section 17 is assembled, see Appendix. Figure 10 The jacking component is placed against the front end of the new pipe section 17, ready to continue pushing the front shield 1 and the tail shield 2 forward. The above operation is repeated until all the old pipes are updated.

[0058] During the above construction process, after the old pipe section 18 is excavated, it can immediately enter the containment space. The front shield side plates 101 on both sides of the containment space form support sidewalls, which can support the trench wall corresponding to the position of the exposed old pipe section 18, ensuring construction safety. In addition, the front baffle 4 can also separate the trench being excavated from the containment space, playing a role in blocking slag and preventing soil from entering the containment space.

[0059] As the front shield 1 and the tail shield 2 move forward, the assembled new pipe section 17 will emerge from the assembly space through the second through hole 8. At this time, the trench needs to be backfilled in time, and a backfill layer 19 composed of backfilled slag will be formed above the new pipe. The rear baffle 7 can act as a slag retainer to prevent backfilled slag from entering the assembly space. Therefore, the rear end of the trench does not need to be sloped and can be backfilled directly up to the rear baffle 7.

[0060] During construction, the tail end of the old pipeline remains within the containment space, while the front end of the new pipeline remains within the assembly space. Both the rear end of the front shield 1 and the front end of the tail shield 2 have openings. After the front shield 1 and tail shield 2 are connected by the connecting structure 3, the openings on the front shield 1 and tail shield 2 communicate and together form a flow channel 21 for the fluid medium to flow between the new and old pipelines. The fluid medium in the old pipeline flows out from its tail end, enters the containment space, then flows through the flow channel 21 into the assembly space, and finally flows into the new pipeline from its front end. Therefore, when using this pipeline replacement construction equipment to replace an old pipeline, it is not necessary to cut off the flow in the old pipeline, maintaining continuous flow of the fluid medium and improving the convenience of construction.

[0061] The shapes of the first through hole 5 and the second through hole 8 can be determined according to the cross-sectional shapes of the new pipe and the old pipe. In the above embodiments, the shapes of the first through hole 5 and the second through hole 8 are both circular. See Appendix. Figure 11 In other embodiments, it can also be a rectangle.

[0062] In other embodiments, the earth removal structure can also have other forms. For example, the upper end of the edge formed by the intersection of the two inclined walls on the protrusion can be inclined forward or backward. There can also be only one inclined wall on the protrusion, and in this embodiment, the inclined wall is located at the front end of the protrusion and is horizontally oriented in the vertical direction, the left end and the right end of the inclined wall are located on the left side and the right side of the old pipeline respectively, and the left end of the inclined wall is inclined forward compared to the right end to discharge all the earth below the old pipeline to the right side. In other embodiments, the front end wall of the front shield bottom plate is inclined, and the left end of the front end wall is inclined forward compared to the right end to discharge the earth below the old pipeline to the right side. In this embodiment, the front end of the front shield bottom plate constitutes the earth removal structure. The earth removal structure can be set according to the needs. For soft soil, the earth below the old pipeline can be squeezed out during the forward movement of the front shield using the front shield bottom plate, and the earth removal structure can also not be set.

[0063] In the above embodiments, the front earth retaining structure is a front baffle, and the first through hole is formed in the front baffle to facilitate the setting of the front earth retaining structure. The front baffle can be fixedly connected to the front shield by welding, or can be detachably connected to the front shield. The detachable connection structure includes a connecting protrusion provided on the inner wall of the front shield, a mounting hole is formed in the connecting protrusion, and a corresponding bolt hole is formed in the front baffle. When the front baffle is installed, the front baffle is overlapped with the connecting protrusion and the bolt hole is aligned with the mounting hole, and then the front baffle is fixedly connected to the connecting protrusion by using a bolt. A sealing strip can be provided between the connecting path and the front baffle to improve the sealing performance. The detachable connection of the front baffle and the front shield can facilitate the replacement of different front baffles according to the needs to adapt to old pipelines of different sizes and shapes.

[0064] In other embodiments, the front earth retaining structure can also be a front earth retaining beam. In this embodiment, the front earth retaining beam is located at the upper part of the front shield, the front earth retaining beam, the front shield side plate, and the front shield bottom plate form a first through hole, and the first sealing structure is located on the lower side of the front earth retaining beam, the upper side of the front shield bottom plate, and the inner side of the front shield side plate. The front earth retaining beam can prevent earth from entering the accommodation space and play a role in retaining earth. This embodiment is suitable for old pipelines with large sizes. In other embodiments, the rear earth retaining structure can also be a rear earth retaining beam, and the setting method of the rear earth retaining beam is similar to that of the front earth retaining beam.

[0065] The first sealing structure and the second sealing structure are arranged to prevent the fluid medium in the accommodating space and the assembling space from flowing out, and also prevent groundwater from entering the accommodating space and the assembling space in a stratum with a high water content. In other embodiments, if there is no fluid medium in the old pipeline and the corresponding stratum has a low water content, the first sealing structure and the second sealing structure can be omitted, and the inner diameter of the first passing hole can be slightly larger than the outer diameter of the old pipeline to facilitate the smooth passing of the old pipeline through the first passing hole, and the gap between the first passing hole and the old pipeline can satisfy the condition that the muck does not flow into the accommodating space. The second passing hole can be arranged in the same manner as the first passing hole.

[0066] The front muck blocking structure and the rear muck blocking structure are arranged to prevent the muck from entering the accommodating space and the assembling space and affecting normal operation. In other embodiments, referring to the accompanying drawings, Figure 12 If the end of the front old pipe section 18 has a flange and the first sealing structure 6 cannot play a good sealing role, the front muck blocking structure can be omitted. In this embodiment, the front shield 1 has sufficient length in the front-rear direction to support the corresponding groove wall of the exposed old pipe section 18 to ensure construction safety, but in order to prevent groundwater from flowing into the new pipe section 17, the rear muck blocking structure and the second sealing structure 9 are still arranged, and the tail end of the front shield 1 is sealed by the partition plate 20 to disconnect the flow channel 21 and prevent groundwater from flowing into the assembling space from there. In other embodiments, if the front shield 1 and the tail shield 2 have sufficient length in the front-rear direction and meet the conditions that there is no fluid medium in the old pipeline and the corresponding stratum has a low water content, the front muck blocking structure and the rear muck blocking structure can be omitted.

[0067] Specific embodiments of the pipeline renewal construction method provided by the present application:

[0068] The pipeline renewal construction method is to first excavate the soil in front of the front shield to expose the old pipeline, and then move the front shield and the tail shield forward. In this process, the old pipe section at the end of the old pipeline enters the accommodating space, and the new pipe section at the head of the new pipeline exits the assembling space. After the old pipe section at the end of the old pipeline completely enters the accommodating space, the old pipe section is lifted out by a crane and the new pipe section is lifted into the assembling space. After the new pipe section is assembled, the above process is repeated until the renewal of the old pipeline is completed.

[0069] In this method, there is no sequence for lifting the old pipe section and the new pipe section. The old pipe section can be lifted out and then the new pipe section is lifted in, or the new pipe section can be lifted in and then the old pipe section is lifted out, or two cranes can be used to simultaneously lift the new pipe section and the old pipe section.

[0070] Finally, it should be noted that the above description is only the preferred embodiments of the present application, and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that modifications can be made to the technical solutions described in the foregoing embodiments without departing from the spirit and principle of the present application, or some technical features thereof can be replaced by equivalent features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A pipeline renovation construction device, characterized in that, The system includes a front shield and a tail shield, both with U-shaped cross-sections, and a jacking mechanism for driving the front and tail shields forward. The front shield includes a front shield base plate and front shield side plates located on the left and right sides of the base plate. A front baffle is fixedly connected to all three components, with a first through hole at the bottom of the baffle for the old pipe section to pass through. The space behind the front baffle within the front shield forms a space for removing the old pipe section, and the opening at the top of this space forms a lifting outlet. The tail shield includes a tail shield base plate and tail shield side plates located on the left and right sides of the base plate. A rear baffle is fixedly connected to the plate and the tail shield side plates on the left and right sides. The lower part of the rear baffle is provided with a second passage hole for the new pipe section to pass through. The space in front of the rear baffle at the tail end forms an assembly space for assembling the new pipe section. The opening at the top of the assembly space is a hoisting entrance. The front shield side plate forms a support side wall for supporting the construction trench wall. A flow channel is provided between the accommodating space and the assembly space for the fluid medium discharged from the old pipeline to flow into the new pipeline. The front end of the front shield bottom plate is provided with a soil discharge structure for discharging the slag below the old pipeline to the side of the old pipeline.

2. The pipeline renovation construction equipment according to claim 1, characterized in that, The first through hole is provided with a first sealing structure for forming a seal between the first through hole and the old pipe section.

3. The pipeline renovation construction equipment according to claim 1, characterized in that, The second through hole is provided with a second sealing structure for forming a seal between the second through hole and the new pipe section.

4. The pipeline renovation construction equipment according to claim 1, characterized in that, The soil removal structure includes a protrusion that extends forward from the front wall of the front shield bottom plate. The protrusion has inclined walls on both the left and right sides, and the front ends of the two inclined walls intersect.

5. The pipeline renovation construction equipment according to claim 1, characterized in that, The rear baffle is provided with a grouting channel for injecting concrete grout into the lower part of the new pipe section to lay the bedding layer. The grouting channel is located below the second through hole.

6. The pipeline renovation construction equipment according to claim 1, characterized in that, The pipeline renovation construction equipment also includes a crane for lifting old and new pipe sections, which is installed at the rear of the front shield or the front of the tail shield.

7. A pipeline renovation construction method using the pipeline renovation construction equipment according to any one of claims 1-6, characterized in that, First, the soil in front of the front shield is excavated to expose the old pipeline. Then, the front and rear shields move forward. During this process, the old pipe section at the end of the old pipeline gradually passes through the front baffle on the front shield and enters the receiving space behind the front baffle inside the front shield. The new pipe section at the beginning of the new pipeline gradually passes through the rear baffle on the rear shield and exits the assembly space in front of the rear baffle inside the rear shield. After the old pipe section at the end of the old pipeline has completely entered the receiving space, a crane is used to lift the old pipe section out and lift the new pipe section into the assembly space. After the new pipe section is assembled, the above process is repeated until the replacement of the old pipeline is completed.

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