Cleaning methods for deep pipelines

Abstract

The application discloses a device and method for removing obstacles in deep pipelines. The device for removing obstacles in deep pipelines comprises a steel sleeve box supporting device, which is characterized in that the steel sleeve box supporting device comprises a steel panel structure and a supporting structure. The steel panel structure comprises front panels and side panels, wherein the side panels are between the front panels, and the front panels and the side panels are welded into a ring shape. The supporting structure is inside the steel sleeve box supporting device, and the supporting structure is welded and fixed with the front panels. The application can effectively solve the risk of underground continuous wall trench collapse, ensure the safe and stable working environment inside the steel sleeve box, shorten the obstacle removal period of deep pipelines in the underground continuous wall construction process, reduce the site restrictions of obstacle removal, and reduce the economic cost of obstacle removal.

Description

[0001] This application is a divisional application of patent application No. 202010595452.4 filed on June 28, 2020, entitled "Device and method for clearing obstacles in deep pipelines". Technical Field

[0002] This invention relates to the field of engineering construction technology, and in particular to a clearing device and method for clearing obstructions in deep pipelines. Background Technology

[0003] In recent years, with the rapid expansion of urban scale and economic development in my country, urban rail transit construction has developed rapidly. As one of the main modes of urban transportation, the complex underground pipelines and obstacles along main urban roads and commercial areas often constrain the construction of underground rail transit projects. For deep and hard underground pipelines and obstacles encountered during diaphragm wall construction, existing technologies typically employ Larssen sheet piles and waler supports to excavate to the bottom of the obstacle, or use a large-scale slope excavation method to excavate to the bottom of the obstacle, followed by manual obstacle removal and finally backfilling using conventional procedures to construct the diaphragm wall. However, the existing methods of using Larssen sheet piles and waler supports to remove deep obstacles have long construction cycles and high economic costs; while the large-scale slope excavation method also has a long construction cycle and, due to the need for large-area slope excavation, has high site requirements and presents site limitations. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a clearing device and method for clearing obstacles in deep pipelines. By utilizing steel casing supports to clear obstacles in deep pipelines and obstacles, a steel casing-type clearing method for deep pipelines is realized, thereby solving the problems of the prior art mentioned above. This shortens the clearing cycle of deep pipelines during the construction of underground continuous walls, reduces site restrictions for clearing obstacles, and reduces the economic cost of clearing obstacles. At the same time, it also enhances the safety and convenience of clearing obstacles.

[0005] To achieve the above objectives, according to one aspect of the present invention, a clearing device for deep pipeline clearing is provided, comprising: a steel casing support device, characterized in that the steel casing support device comprises: a steel panel structure, the steel panel structure comprising a front panel and a side panel, wherein the side panel is between the front panel and the front panel and the side panel are welded to form a ring; and a support structure, the support structure being inside the steel casing support device and welded and fixed to the front panel.

[0006] Preferably, the spacing between the side panels is no greater than the width of the front panel.

[0007] Preferably, the length of the side panel is less than the length of the front panel.

[0008] Preferably, the obstacle removal device for deep pipeline clearing further includes a reserved groove at the bottom of the steel casing support device.

[0009] Preferably, the obstacle removal device for deep pipeline clearing further includes a lifting hole located at the top of the steel casing support device.

[0010] Preferably, the clearing device for deep pipeline clearing further includes a support hole located at the top of the steel casing support device.

[0011] Preferably, the support structure includes a first number of longitudinal support members arranged along the width direction inside the steel casing support device, wherein the center-to-center distance between the laterally arranged longitudinal support members is a first distance, and the center-to-center distance between the centrally arranged longitudinal support members is a second distance.

[0012] Preferably, the support structure includes a second number of transverse support members arranged along the length direction inside the steel casing support device, wherein the center spacing between the transverse support members is a third spacing, and the center spacing of the top and bottom outermost transverse support members of the steel casing support device from the outer edge of the steel casing support device is a fourth spacing.

[0013] Preferably, the length of the support structure is the same as the width of the side panel.

[0014] To achieve the above objectives, according to another aspect of the present invention, a method for clearing obstacles using a clearing device for deep pipeline clearing is provided, characterized by comprising the following steps: preparing a specific construction plan based on the location and depth obtained through exploratory excavation, and prefabricating a steel casing according to calculations; inserting locking pipes on both sides of the excavated trench, hoisting the prefabricated steel casing support device, and fixing the position of the steel casing support device with a support pole; pumping out the mud in the trench; manually entering the steel casing support device to clear the obstacle to the bottom of the obstacle; and after the obstacle clearing is completed, refilling the mud and pulling out the steel casing support device and locking pipes.

[0015] One or more embodiments of the above invention have at least the following advantages or beneficial effects simultaneously:

[0016] First, this invention uses a deep-layer pipe steel casing box for obstacle removal. It only requires hoisting the steel casing box into the diaphragm wall trench and manually clearing the obstacles. The obstacle removal operation is simple and convenient. Compared with the Larssen pile method, this invention reduces the process of driving and removing steel sheet piles and the process of installing and dismantling walers and supports. Compared with the large-scale excavation method, this invention reduces the amount of earthwork excavation and backfilling over a large area. As a result, this invention can greatly shorten the obstacle removal cycle.

[0017] Secondly, this invention only requires the steel casing to be hoisted into the diaphragm wall trench, and obstacles to be cleared manually. Afterwards, the steel casing can be recycled and reused. Compared with the Larssen pile method, this invention reduces the rental costs of Larssen piles, steel walers, and steel supports, as well as the costs of mechanical installation. Compared with the open-cut method, this invention reduces the mechanical costs of earthwork excavation and backfilling, as well as the transportation costs of earthwork transportation and internal barge transport. Thus, this invention can greatly save costs.

[0018] Third, the steel casing of the present invention has a small overall volume and occupies little space. Compared with large-scale excavation for obstacle removal, the present invention does not require large-scale excavation, thereby reducing site restrictions for obstacle removal.

[0019] Fourth, this invention uses a prefabricated steel casing placed into the underground continuous wall trench to withstand the soil pressure of the trench wall, ensuring a safe and stable working environment inside the steel casing, guaranteeing the smooth implementation of deep obstacle removal operations, and enhancing the safety of obstacle removal operations. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the steel casing support device of the obstacle removal device for deep pipeline obstacle removal according to an embodiment of the present invention.

[0022] Figure 2 This is a perspective view of a steel casing support device for a deep pipeline clearing apparatus according to an embodiment of the present invention.

[0023] Figure 3 This is a side view of the steel casing support device of a clearing apparatus for deep pipeline clearing according to an embodiment of the present invention.

[0024] Figure 4 This is a front view of the steel casing support device of a clearing apparatus for deep pipeline clearing according to an embodiment of the present invention.

[0025] Figure 5 This is a plan view of the steel casing support device of a clearing device for deep pipeline clearing according to an embodiment of the present invention.

[0026] Figure 6a This is a schematic diagram of the welding between the support structure and the front panel of the steel casing support device of the obstacle removal device for deep pipeline obstacle removal according to an embodiment of the present invention.

[0027] Figure 6bThis is an enlarged view of the welding between the support structure of the steel casing support device of the obstacle removal device for deep pipeline obstacle removal according to an embodiment of the present invention and the front panel.

[0028] Figure 7 This is a flowchart of a method for clearing obstructions in a deep pipeline according to an embodiment of the present invention.

[0029] Figure 8 This is a longitudinal bending moment diagram of the steel casing support device of a clearing device for deep pipeline clearing according to an embodiment of the present invention.

[0030] Figure 9 This is a transverse bending moment diagram of the steel casing support device of a clearing device for deep pipeline clearing according to an embodiment of the present invention.

[0031] Figure 10 This is a simulation diagram of the buckling degree of the RISA-2D steel panel of the steel casing support device for a deep pipeline clearing device according to an embodiment of the present invention.

[0032] Figure label:

[0033] 101-Reserved slot; 102-Front panel; 103-Side panel; 104-Support structure; 201-Lifting hole; 202-Supporting hole; 501-Lock tube. Detailed Implementation

[0034] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of the present invention, including various details to aid understanding. These details should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the invention. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0036] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used to describe the relative positions of components in relation to the directions shown in the accompanying drawings or in relation to the vertical, perpendicular, or gravitational directions.

[0037] In summary, this invention relates to the clearing of deep pipelines and obstacles during the construction of diaphragm walls for underground engineering retaining structures. This invention effectively mitigates the risk of diaphragm wall trench collapse by transferring soil pressure from the trench wall to the steel casing support system through a prefabricated steel casing, ensuring a safe and stable working environment inside the steel casing. Simultaneously, it allows for the efficient, low-cost, and short-cycle clearing of deep pipelines and obstacles.

[0038] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] According to one aspect of the embodiments of the present invention, the present invention is based on Figures 1 to 6b A device for clearing obstructions in deep pipelines is provided. The device for clearing obstructions in deep pipelines according to the present invention mainly includes: a steel casing support device, characterized in that the steel casing support device includes: a steel panel structure, the steel panel structure including a front panel and side panels, wherein the side panels are located between the front panels, and the front panels and side panels are welded together to form a ring; and a support structure, the support structure being located inside the steel casing support device, and the support structure being welded and fixed to the front panel.

[0040] Figure 1 This is a schematic diagram of the overall structure of the steel casing support device of the obstacle removal device for deep pipeline obstacle removal according to an embodiment of the present invention. Figure 2 This is a perspective view of a steel casing support device for a deep pipeline clearing apparatus according to an embodiment of the present invention.

[0041] like Figure 1 and Figure 2 As shown, the obstacle removal device for deep pipeline clearing includes a steel casing support device 1. The steel casing support device 1 may include a steel panel structure, which may include a front panel 102 and side panels 103. The side panels 103 are located between the front panels 102, and the front panels 102 and side panels 103 can be welded into a ring. For example, the front panel 102 can be welded to the side panels 103 into a ring using fillet welds. More specifically, the front panel 102 and side panels 103 are welded into a ring using 6mm fillet welds.

[0042] The steel casing support device 1 may further include a support structure 104, which is located inside the steel casing support device 1 and can be welded and fixed to the front panel 102. For example, the support structure 104 and the front panel 102 can also be firmly welded together using fillet welds. More specifically, the support structure 104 and the front panel 102 can also be firmly welded together using 6mm fillet welds.

[0043] from Figure 1 and Figure 2As can be seen, the two side panels 103 can be positioned between the two front panels 102. Furthermore, the distance between the two side panels 103 can be no greater than the width of the two front panels 102, which is for the sake of a suitable working surface and appropriate economic cost considerations. Specifically, when the width of the front panel 102 is greater than the distance between the side panels 103, each front panel 102 is extended by a certain distance compared to the side panels 101 to facilitate welding and ensure welding quality.

[0044] Furthermore, the front panel 102 and the side panel 103 can have the same thickness, which ensures convenient material sourcing, ease of operation, and consistent steel hardness, thus enhancing safety. Moreover, the length of the side panel 103 can be shorter than the length of the front panel 102, correspondingly providing space at the bottom of the front panel 102 for a pre-drilled groove 101.

[0045] Furthermore, the spacing between the two front panels 102 can be the same as the width of the side panels 103. The sum of the spacing between the two front panels and the thickness of the two front panels equals the thickness of the diaphragm wall. This is to ensure the proper lowering of the steel casing support device into the diaphragm wall trench. This technical feature will be further described in detail later.

[0046] like Figure 1 As shown, the reserved groove 101 can be located at the bottom of the steel casing support device 1. A reserved groove 101 of a certain size can be opened at the bottom of the steel plate of the steel casing support device 1 according to the pipeline size and measured location. The reserved groove 101 is used to place abandoned pipelines, thereby facilitating obstacle removal operations. Specifically, since pipeline clearing machinery can only excavate to the top of the pipeline, the excavation from the top to the bottom of the pipeline needs to be done manually. If the reserved groove 101 is not provided, the soil around the trench walls from the top to the bottom of the pipeline may collapse during manual clearing, affecting the clearing operation. After the reserved groove is opened, the steel casing can still provide support for the soil in the pipeline area.

[0047] like Figure 1 and Figure 2 As shown, the lifting hole 201 can be located on the top of the steel casing support device 1. For example, the lifting hole 201 can be located on the top of the front panel 102 of the steel casing support device 1. The placement hole 202 can also be located on the top of the steel casing support device 1. For example, the placement hole 202 can be located on the top of the front panel 102 of the steel casing support device 1. The lifting hole 201 and the placement hole 202 are mainly for facilitating the lifting and fixing of the steel casing support device 1. Figure 2As can be seen from the length direction of the steel casing support device 1, the lifting hole 201 can be above the resting hole 202. More specifically, the lifting hole 201 can be directly above the resting hole 202. The diameter of the resting hole 202 can be different from the diameter of the lifting hole 201. For example, the diameter of the resting hole 202 is larger than the diameter of the lifting hole 201. The lifting hole 201 is mainly for facilitating the lifting of the steel casing support device 1, while the resting hole 202 is mainly for inserting a resting spreader pole (not shown) into the ground to fix the steel casing support device 1.

[0048] like Figure 1 and Figure 2 As shown, the support structure 104 includes a first number of longitudinal support members arranged along the width direction inside the steel casing support device 1. The center-to-center distance between the laterally arranged longitudinal support members is the first distance, and the center-to-center distance between the centrally arranged longitudinal support members is the second distance. Specifically, the size of the second distance is different from the size of the first distance. Further, the second distance is larger than the first distance. Specifically, the larger second distance is to provide the necessary obstacle removal operation surface, and the distance setting must meet the calculation requirements.

[0049] The support structure 104 includes a second number of transverse support members arranged along the length direction inside the steel casing support device 1. The center-to-center spacing between the transverse support members is the same, which is a third spacing. The center-to-outer edge transverse support members at the top and bottom of the steel casing support device are each equidistant from the outer edge of the steel casing support device, and the center-to-outer edge spacing of the top and bottom edge transverse support members is defined as a fourth spacing. The size of the third spacing is different from the size of the fourth spacing. Furthermore, the fourth spacing is smaller than the third spacing. This spacing design allows the steel casing support device to meet the minimum requirements of the design calculations.

[0050] Specifically, the first number and the second number can be different. Furthermore, the first number can be smaller than the second number. Even further, the ratio of the first number to the second number can be 1:2.

[0051] Specifically, such as Figure 2 As shown, the outermost longitudinal support members on the left and right sides can approach the two side panels 103 respectively, but neither of them directly contacts the two side panels 103.

[0052] The spacing between the front panels 102 can be the same as the width of the side panels 103. The length of the support structure 104 can also be the same as the width of the side panels 103, thereby ensuring that the support structure 104 is perpendicular to the front panels 102, ensuring proper force distribution, and enhancing the safety of obstacle removal. As mentioned above, the support structure 104 can be welded and fixed to the front panels 102.

[0053] Next, we will refer to Figure 3 and Figure 4 The above description will be further described in more detail and with more specific examples from the embodiments. Figure 3 This is a side view of the steel casing support device of a clearing apparatus for deep pipeline clearing according to an embodiment of the present invention. Figure 4 This is a front view of the steel casing support device of a clearing apparatus for deep pipeline clearing according to an embodiment of the present invention.

[0054] like Figure 3 and Figure 4 As shown, in a specific embodiment of the present invention, for example, the front panel 102 can be made of a Q235 steel plate with a planar size of 230*800cm and a thickness of 2cm, and can be welded to the side panel 103 to form a ring by fillet welding. For example, the side panel 103 can be made of a Q235 steel plate with a planar size of 76*740cm and a thickness of 2cm, and can be welded to the front panel 102 to form a ring by fillet welding.

[0055] The distance between the two side panels 103 may not exceed the width of the two front panels 102. For example, the distance between the two side panels 103 is 220cm, which is less than the width of the two front panels 102 (230cm). This is for the sake of a suitable working surface and appropriate economic cost. Specifically, this design is based on the fact that the diameter of the obstruction pipeline is, for example, 30cm. Considering a suitable working surface and economic cost, the front panel is 230cm wide. Thus, when the width of the front panel 102 (230cm) is larger than the distance between the side panels 103 (220cm), each front panel 102 is 5cm wider than the side panel 101 to facilitate welding, ensure welding quality, and ensure that the working surface width is 220cm.

[0056] Furthermore, for example, the 76cm spacing between the two front panels 102 can be the same as the 76cm width of the side panel 103. The sum of the 76cm spacing between the two front panels and the 2cm thickness of the two front panels equals the diaphragm wall thickness of 80cm. This is to ensure the proper lowering of the steel casing support device into the diaphragm wall trench. In other words, the diaphragm wall thickness in the project involved in this invention is 80cm. To ensure the proper lowering of the steel casing, the net spacing between the two front panels needs to be controlled at 76cm, which, when added to the thickness of the two front panels, equals the diaphragm wall thickness, i.e., 76cm + 2cm + 2cm = 80cm. Therefore, this invention can also ensure the resistance to trench wall soil pressure, ensure a safe and stable working environment inside the steel casing, effectively solve the risk of diaphragm wall trench collapse, and ensure the smooth implementation of deep obstacle removal operations.

[0057] Furthermore, the thickness of the front panel 102 and the side panel 103 can be the same, for example, 2cm. This ensures convenient material sourcing, ease of operation, and consistent steel hardness, enhancing safety. Moreover, for example, the length of the side panel 103 (740cm) can be less than the length of the front panel 102 (800cm), correspondingly providing space at the bottom of the front panel 102 for a pre-reserved groove 101. For example, the length-to-width ratio of the pre-reserved groove 101 can be, for example, 2:1. Further, the dimensions of the pre-reserved groove can be, for example, 60*30cm, i.e., 60cm long and 30cm wide. The dimensions of the pre-reserved groove can be adjusted according to the pipeline size and actual measured location, allowing the pre-reserved groove 101 to accommodate abandoned pipes, thereby facilitating obstacle removal operations. This is because: pipeline clearing machinery can only excavate up to the top of the pipeline, and manual excavation is required from the top to the bottom of the pipeline. If no pre-reserved trench is set up, the soil around the trench wall from the top to the bottom of the pipeline may collapse during the manual soil clearing process, affecting the clearing operation. After the pre-reserved trench is set up, the steel casing of the soil in the pipeline area can still play a supporting role.

[0058] like Figure 4 As shown, for example, a mounting hole 201 can be located at the top of the front panel 102. For example, a placement hole 202 can be located at the top of the front panel 102. The number of mounting holes 201 and placement holes 201 can be the same. For example, the number of mounting holes 201 and placement holes 201 can be four. Figure 4 In the vertical direction, that is, from the length direction of the steel casing support device 1, the lifting hole 201 can be above the resting hole 202, more specifically, the lifting hole 201 can be directly above the resting hole 202. The diameter of the resting hole 202 and the diameter of the lifting hole 201 can be different. More specifically, the diameter of the resting hole 202 is larger than the diameter of the lifting hole 201. More preferably, for example, the ratio of the diameter of the resting hole 202 to the diameter of the lifting hole 201 is 2:1. For example, Figure 4 As shown, the diameter of the placement hole 202 is 10cm and the radius is 5cm, while the diameter of the hoisting hole 201 is 5cm and the radius is 2.5cm. The hoisting hole 201 is mainly for facilitating the hoisting of the steel casing support device 1, while the placement hole 202 is mainly for inserting a placement spreader (not shown) into the ground to fix the steel casing support device 1.

[0059] like Figure 4 As shown, the distance from the center of the mounting hole 201 to the top edge of the front panel and the distance from the center of the support hole 202 to the top edge of the front panel can be different. Preferably, for example, the ratio of the distance from the center of the mounting hole 201 to the top edge of the front panel to the distance from the center of the support hole 202 to the top edge of the front panel can be 1:2. For example, the distance from the center of the mounting hole 201 to the top edge of the front panel is 10cm, while the distance from the center of the support hole 202 to the top edge of the front panel is 20cm.

[0060] like Figure 4 As shown, for example, the support structure 104 may include four longitudinal support members arranged along the width direction inside the steel casing support device 1. Figure 4 In the width direction, the center-to-center distance between the lateral longitudinal track supports is the first distance, and the center-to-center distance between the centrally located longitudinal track supports is the second distance. Specifically, the size of the second distance is different from that of the first distance. Further, the second distance is larger than the first distance. Specifically, the larger second distance is to provide the necessary obstacle clearing operation surface, and the distance setting must meet calculation requirements. For example, the ratio of the first distance to the second distance can be 1:3. More specifically, for example, the first distance on both the left and right sides is 40cm, while the second distance is 120cm.

[0061] Furthermore, for example, the support structure 104 may include eight transverse support members arranged along its length inside the steel casing support device 1. The center-to-center spacing between the transverse support members is a third spacing, and the center distance from the outer edge of the top and bottom outermost transverse support members of the steel casing support device to the outer edge of the steel casing support device is a fourth spacing. The sizes of the third and fourth spacings can be different. Further, the fourth spacing can be smaller than the third spacing. This spacing design allows the steel casing support device to meet the minimum requirements of the design calculations. For example, the ratio of the third spacing to the fourth spacing can be, for example, 2:1. More specifically, for example, the third spacing is 100cm, while the fourth spacing is 50cm.

[0062] For example, the length 76cm of the support structure 104 can be the same as the width 76cm of the side panel 103, thereby ensuring that the support structure 104 is perpendicular to the front panel 102, ensuring proper force distribution and enhancing the safety of obstacle removal.

[0063] For example, the support structure 104 can be a channel steel. More specifically, the support structure 104 can be a 14b channel steel (i.e., Figure 4 Model 1 in the series.

[0064] For example, such as Figure 4 As shown, the outermost longitudinal track supports on the left and right sides can approach the side panels 103 respectively, but neither directly contacts the two side panels 103. The left and right longitudinal track supports are symmetrically arranged within the steel casing support device 1. Specifically, for example, as... Figure 4 As shown, from Figure 4 Looking from left to right, the center of the second longitudinal support is 55cm (the sum of 15cm and 40cm) from the left edge of the front panel 102. The center of the third longitudinal support is 55cm from the right edge of the front panel 102. Further, as... Figure 4 As shown, the center of the first longitudinal support is 15cm away from the left edge of the front panel 102, while the center of the fourth longitudinal support is 15cm away from the right edge of the front panel 102 (the difference between 55cm and 40cm).

[0065] Furthermore, an embodiment of the present invention can be taken as an example of clearing a D300 gas steel pipe. More specifically, the obstacle to be cleared by the present invention is an abandoned DN300 gas pipe, made of 1cm thick steel pipe, buried at a depth of approximately 750cm. Therefore, a prefabricated steel casing support device with a length of 800cm is constructed. In conjunction with the foregoing, for an abandoned gas pipe buried at a depth of 750cm, a 30cm long groove (i.e., the aforementioned reserved groove 101 with dimensions of 60*30cm) is provided at the bottom of the steel casing support device. This facilitates pipe cutting operations and the placement of the abandoned pipe. A support hole 202 is provided at the top, 20cm from the top, to facilitate the placement of a spreader pole through the support hole on the steel casing for vertical fixation. Thus, a prefabricated steel casing support device with a length of 800cm (750cm + 30cm + 20cm = 800cm) is constructed. In other words, the relevant parameters of the steel casing support device are comprehensively set considering the needs for placement, hoisting, placement of the abandoned pipe, and ease of cutting.

[0066] Figure 5 This is a plan view of a steel casing support device for a deep pipeline clearing apparatus according to an embodiment of the present invention. To avoid repetition, descriptions of identical structures are omitted here. Further, as... Figure 5 As shown, for example, the locking pipes 501 are respectively arranged on the sides of the two side panels 103 of the steel casing support device. This is because the width of the excavated trench is larger than the width of the steel casing support device. In order to prevent the lateral soil wall from collapsing after the mud is pumped out, the locking pipes 501 are inserted on both sides of the two side panels 103 of the steel casing support device.

[0067] Figure 6a This is a schematic diagram of the welding between the support structure and the front panel of the steel casing support device of the obstacle removal device for deep pipeline obstacle removal according to an embodiment of the present invention. Figure 6b This is an enlarged view of the welding between the support structure of the steel casing support device of the obstacle removal apparatus for deep pipeline obstacle removal according to an embodiment of the present invention and the front panel. (See 6a and...) Figure 6b As shown, the supporting structure is firmly welded to the front panel using 6mm fillet welds.

[0068] In this embodiment of the invention, a deep-layer pipeline steel-casing box-type obstacle removal method is employed. The steel casing is simply hoisted into the diaphragm wall trench, and obstacles are manually cleared. This method is simple and convenient, significantly shortening the obstacle removal cycle. Furthermore, the steel casing can be recycled and reused during manual obstacle removal, greatly saving costs. The steel casing of this invention has a small overall volume and occupies little space, eliminating the need for large-scale excavation and reducing site restrictions for obstacle removal. Another important point is that by lowering the prefabricated steel casing into the underground diaphragm wall trench, it withstands the soil pressure of the trench wall, ensuring a safe and stable working environment inside the steel casing. This guarantees the smooth implementation of deep obstacle removal operations and enhances the safety of the operation.

[0069] Next, according to embodiments of the present invention, the embodiments of the present invention are based on Figures 7 to 10 A method for clearing obstructions using a clearing device for deep pipeline clearing is provided. Figure 7 This is a flowchart of a method for clearing obstructions in a deep pipeline according to an embodiment of the present invention. Figure 8 This is a longitudinal bending moment diagram of the steel casing support device of a clearing device for deep pipeline clearing according to an embodiment of the present invention. Figure 9 This is a transverse bending moment diagram of the steel casing support device of a clearing device for deep pipeline clearing according to an embodiment of the present invention. Figure 10 This is a simulation diagram of the buckling degree of the RISA-2D steel panel of the steel casing support device for a deep pipeline clearing device according to an embodiment of the present invention.

[0070] like Figure 7 As shown, the obstacle removal method of the obstacle removal device for deep pipeline clearing of the present invention mainly includes the following steps: preparing a special construction plan based on the location and depth obtained by exploration and excavation, and prefabricating a steel casing according to the calculation sheet S701; inserting locking pipes on both sides of the excavated trench, hoisting the prefabricated steel casing support device, and fixing the position of the steel casing support device with a support pole S702; pumping out the mud in the trench S703; manually entering the steel casing support device to clear the obstacle to the bottom of the obstacle S704; and after the obstacle removal is completed, refilling the mud and pulling out the steel casing support device and locking pipe S705.

[0071] Furthermore, prior to step S701 of the method of the present invention, the obstacle removal method of the obstacle removal device for deep pipeline obstacle removal according to the present invention further includes: setting out according to drawings, determining the approximate location of the pipeline, and using mechanical excavation to determine the actual location and burial depth of the pipeline. In the above step (1), the present invention adopts the diaphragm wall construction process, and under the premise of mud slurry, for example, using a trenching machine for excavation.

[0072] Furthermore, in step S701 of the method of the present invention, based on the location and depth obtained through excavation, a special construction plan for clearing obstacles is prepared according to the actual site conditions, and structural analysis is performed using RISA-2D to obtain the degree of buckling at different locations in two directions (as shown in the figures below). Figure 8 and Figure 9 As shown); the deflection was linearly superimposed using Matlab to simulate the panel deformation in 3D (e.g. Figure 10 As shown in the figure, the stress change of the prefabricated steel casing is verified.

[0073] In this embodiment of the method, the obstacle on which the calculation of the present invention is based can be taken as an example of an abandoned DN300 gas pipe. More specifically, the obstacle to be cleared by the present invention is an abandoned DN300 gas pipe, the pipe material is 1cm thick steel pipe, and the burial depth is about 750cm. Therefore, a steel casing support device with a prefabricated length of 800cm is used. Taking into account the needs of placement, hoisting, placement of abandoned pipes, and ease of cutting, the obstacle clearing method of the present invention pre-defines the relevant parameters of the steel casing support device. For example, the bottom of the 800cm long steel casing support device has a 30cm long groove (i.e., the aforementioned reserved groove with dimensions of 60*30cm), which facilitates pipe cutting operations and placement of abandoned pipes. A placement hole 202 is provided at the top 20cm from the top to facilitate the placement of a spreader pole through the placement hole on the steel casing to fix its vertical position.

[0074] The method step S702 of the present invention further specifically includes: inserting a shackle into the lifting hole at the top of the steel casing support device, performing a trial lift using a crawler crane to ensure safety and stability, and then slowly lowering the steel casing support device into the diaphragm wall trench. The opening of the pre-reserved groove is accurately positioned above the pipeline. Finally, a spreading beam is inserted into the ground to fix the position of the steel casing support device, and the shackle is released to remove the crawler crane. Furthermore, after completing the above method step S701, when excavation reaches the top of the obstacle, the above method step S702 is executed.

[0075] Furthermore, the obstacle removal method of the obstacle removal device for deep pipeline obstacle removal according to the present invention further includes:

[0076] After step S705, proceed with the normal construction procedures for diaphragm walls.

[0077] The obstacle removal method of the obstacle removal device for deep pipeline cleaning of the present invention corresponds to the obstacle removal device for deep pipeline cleaning of the present invention.

[0078] The obstacle removal device and method for deep pipeline obstacle removal according to embodiments of the present invention realize the steel-casing type obstacle removal method for deep pipelines, thereby solving the problems of the prior art, shortening the obstacle removal cycle of deep pipelines during the construction of underground continuous walls, reducing site restrictions for obstacle removal, reducing the economic cost of obstacle removal, and enhancing the safety and convenience of obstacle removal.

[0079] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for removing an obstruction from a deep pipeline, characterized in that, The steps include: S701: preparing a special construction scheme according to the position and depth obtained by exploration and excavation, and prefabricating a steel sleeve box according to the calculation book; S702: inserting lock pipes on both sides of the excavated trench, hoisting the prefabricated steel sleeve box support device, and fixing the position of the steel sleeve box support device with a resting pole, wherein the steel sleeve box support device includes a steel panel structure including front panels and side panels, and a support structure inside the steel sleeve box support device, the side panels are between the front panels, the front panels and the side panels are welded into a ring shape, and the support structure is welded and fixed with the front panels, wherein a fixed size reserved groove is provided at the bottom of the steel sleeve box support device for placing waste obstacles, thereby facilitating the obstacle removal operation of the waste obstacles, and wherein the S702 step further includes: passing a shackle through the lifting hole at the top of the steel sleeve box support device, performing a trial hoisting with a crawler crane, slowly placing the steel sleeve box support device into the diaphragm wall trench after ensuring safety and stability, accurately positioning the groove opening of the reserved groove above the pipeline, and finally fixing the position of the steel sleeve box support device on the ground with a resting pole passing through the resting hole located directly below the lifting hole, and removing the shackle from the crawler crane; S703: pumping and draining the mud in the trench; S704: manually entering the steel sleeve box support device to clean the waste obstacles to the bottom of the waste obstacles; and S705: backfilling mud after obstacle removal is completed, and pulling out the steel sleeve box support device and the lock pipe, Before the step S701, it further includes: placing a sample according to the drawing, determining the approximate position of the pipeline, and determining the actual position and burial depth of the pipeline by mechanical exploration.

2. The method for removing an obstacle from a deep pipeline according to claim 1, wherein The step S701 further includes: preparing a special obstacle removal construction scheme according to the position and depth obtained by exploration and excavation, and performing structural analysis using RISA-2D to obtain the buckling degree at different positions in two directions; performing linear superposition on the deflection by Matlab, simulating the deformation of the panel in 3D, and checking the stress change of the steel sleeve box to prefabricate the steel sleeve box.

3. The obstacle removal method for deep pipeline obstacle removal according to claim 1, wherein The support structure includes: a first number of columns of longitudinal lane supports arranged in the width direction, and each column of longitudinal lane supports is provided with a second number of rows of transverse lane supports in the length direction, wherein the leftmost and rightmost longitudinal lane supports in the longitudinal lane supports are respectively close to the side panels but do not directly contact the side panels, and wherein the left and right longitudinal lane supports in the longitudinal lane supports are symmetrically arranged inside the steel sleeve box support device.

4. The obstacle removal method for deep pipeline obstacle removal according to claim 3, wherein The center distance between the laterally arranged longitudinal lane supports is a first distance, and the center distance between the centrally arranged longitudinal lane supports is a second distance, and wherein the second distance is greater than the first distance, thereby facilitating the provision of a necessary waste obstacle removal operation surface.

5. The method for removing an obstacle from a deep pipeline according to claim 3, wherein The center distance between the lateral track supports is a third distance, and the center distance from the outer edge of the steel casing support device to the outermost lateral track support at the top and bottom of the steel casing support device is a fourth distance, and wherein the fourth distance is less than the third distance.

6. The method for deep pipeline obstacle removal according to claim 3, wherein, The ratio of the first number to the second number is 1:

2.

7. The method for deep pipeline obstacle removal according to claim 1, wherein, The diameter of the resting hole is greater than the diameter of the hoisting hole.

8. The method for removing an obstacle from a deep pipeline according to claim 1, wherein The sum of the spacing of the front panel plus the thickness of the front panel is equal to the thickness of the diaphragm wall, thereby ensuring that the steel casing support device is normally lowered into the diaphragm wall trench, thereby solving the risk of diaphragm wall trench collapse and ensuring the smooth implementation of deep obstacle removal operations.

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