Steel splicing pipe for replacing pipe jacking device in emergency and corresponding underground pipeline

Abstract

The utility model relates to a steel splicing pipe for replacing a pipe jacking device in emergency, which is composed of one or more sections of steel splicing pipe single bodies, each steel splicing pipe single body is formed by folding two single-piece pipes, each single-piece pipe is in the shape of a semicircular pipe, the edges of the two sides of each single-piece pipe are respectively provided with a straight folding edge, and the edges of the two ends of each single-piece pipe are respectively provided with a semicircular ring-shaped folding edge. The straight folded edges which are mutually folded in the two single-piece pipes are fastened through fastening bolts, the semicircular folded edges which are mutually folded in the two steel splicing pipe single bodies are fastened through fastening bolts, and middle rib plates which extend in the axial direction are arranged on the outer side faces of the single-piece pipes. The utility model further relates to an underground pipeline adopting the steel splicing pipe, the underground pipeline comprises a working pipe and a casing pipe, and the casing pipe adopts the steel splicing pipe and is sleeved on the outer side of the working pipe. By means of the steel splicing pipe and the underground pipeline, operation can be continued under the condition that conventional pipe jacking construction is blocked.

Description

Technical Field

[0001] The utility model relates to a steel pipe assembly for an emergency replacement pipe jacking device and a corresponding underground pipeline. Background Art

[0002] Pipe jacking technology enables underground pipeline laying without ground excavation, allowing pipelines to pass beneath existing objects such as surface buildings, underground pipelines, and riverbeds. This not only minimizes the impact on existing objects but also significantly reduces the intensity and scope of interference with social life on the ground, making it widely popular. However, this construction method is significantly affected by underground factors. When encountering sandy and gravel formations prone to collapse or rockfall, it is very easy for the pipeline to become stuck or ruptured, making it difficult for pipe jacking construction to proceed smoothly. Currently, the commonly used approach for strata prone to collapse is to reinforce them with grouting before jacking, or to reselect the pipe jacking route to avoid strata prone to collapse. These treatment methods will inevitably lead to extended construction periods and increased costs, especially when the pipe becomes stuck after the pipe jacking construction has advanced a certain distance and cannot be further advanced. The losses caused by re-routing the pipe jacking route will be even greater. Utility Model Content

[0003] The purpose of the utility model is to provide a steel spliced ​​pipe and a corresponding underground pipeline that can replace an emergency pipe jacking device. By adopting the steel spliced ​​pipe and the underground pipeline of the utility model, operations can be continued in some situations where conventional pipe jacking construction is blocked.

[0004] The technical solution of the utility model is: a steel spliced ​​pipe for emergency replacement of pipe jacking device, which is composed of one or more sections of steel spliced ​​pipe monomers (or single-section steel spliced ​​pipes), and the multiple sections of steel spliced ​​pipe monomers are connected in sequence along the axial direction. The steel spliced ​​pipe monomer is formed by two single-piece pipes (single-piece steel spliced ​​pipes) being matched together. The single-piece pipe (or the main part of the single-piece pipe) is in the shape of a semicircular tube (equivalent to cutting a circular pipe into two halves through its axis, and the shape of any one half), both side edges (edges in the circumferential direction) are provided with straight folding edges (rectangular plane folding edges), and both end edges (edges in the axial direction) are provided with semicircular annular folding edges, and the two single-piece pipes (matched to form the same steel) are matched together. The straight folded edges that fit together (fit) in the two monolithic tubes of the spliced ​​tube unit are fastened by fastening bolts, thereby achieving a fixed connection between the two monolithic tubes. The semicircular annular folded edges that fit together in the two steel spliced ​​tube units (two steel spliced ​​tube units connected to each other) are fastened by fastening bolts, thereby achieving a fixed connection between the two steel spliced ​​tube units. An axially extending intermediate rib (a rib located between the two side edges) is provided on the outer surface of the monolithic tube. The number of the intermediate ribs is one or more, and the two ends are respectively connected to the semicircular annular folded edges at the corresponding ends, and are connected to the semicircular annular folded edges at the corresponding ends to form a whole, so as to further improve the strength of the monolithic tube.

[0005] Depending on actual needs, sealing material (for example, a conformable sealing gasket) may be provided between the mutually aligned straight folded edges of two monolithic tubes (two monolithic tubes aligned to form the same steel tube unit), or may not be provided with sealing material.

[0006] The above-mentioned sealing material / sealing gasket may be provided by any suitable existing technology. For example, a convex-concave structure for embedding / clamping the sealing material / sealing gasket may be provided on the mating surface of the straight folded edge.

[0007] Preferably, the number of holes for setting fastening bolts on the straight folding edge is two and they are respectively located near the two ends of the straight folding edge.

[0008] The holes for setting fastening bolts on each straight folded edge are arranged in the same manner, that is, when any two single-piece tubes (in practice, single-piece tubes of the same specification) are aligned with each other, the corresponding holes for setting fastening bolts on the two aligned straight folded edges are aligned with each other.

[0009] According to actual needs, a sealing material (eg, a conformable sealing gasket) may be provided between the mutually facing semicircular annular folded edges of the two steel pipe units (two steel pipe units connected to each other), or no sealing material may be provided.

[0010] The sealing material / sealing gasket may be provided by any suitable existing technology. For example, a convex-concave structure for embedding / clamping the sealing material / sealing gasket may be provided on the mating surface of the semicircular fold.

[0011] Preferably, the number of holes for setting fastening bolts on the semicircular fold is one and the hole is located in the middle (circumferential middle) of the semicircular fold.

[0012] The holes for setting fastening bolts on each semicircular fold are arranged in the same manner, that is, when any two monolithic tubes (monolithic tubes of the same specification) are axially butted together, the holes for setting fastening bolts on the two semicircular folds are aligned with each other.

[0013] Preferably, the folded edges (straight folded edges and semicircular folded edges) on the same single-piece tube are connected end to end, thereby forming a closed rib structure on the outer surface of the single-piece tube (the straight folded edges and semicircular folded edges can both play a reinforcing role of the ribs and can be used as ribs).

[0014] The heights (dimensions in the radial direction) of the straight flanges, the semicircular flanges and the intermediate ribs (if provided) are generally equal.

[0015] When an intermediate rib is provided in the middle portion of the outer surface of the monolithic tube (for example, when there is only one intermediate rib), the holes for receiving the fastening bolts on the semicircular folded edge can be staggered relative to the intermediate rib and can be located on one side of the intermediate rib. After the staggered arrangement, the holes for receiving the fastening bolts on the two semicircular folded edges at both ends of the monolithic tube should also be aligned so that when the two monolithic tubes are axially butted together, the holes for receiving the fastening bolts on the semicircular folded edges that abut against each other are aligned.

[0016] The monolithic tube can be made of steel plates, and the fixed connection between the parts on the same monolithic tube can be one-piece pressure forming and welding.

[0017] An underground pipeline using steel spliced ​​pipes includes a working pipe and a casing. The working pipe is formed by connecting multiple sections of working pipes (for example, by socket connection). The casing uses any steel spliced ​​pipe of the emergency alternative pipe jacking device disclosed in the utility model and is sleeved on the outside of the working pipe.

[0018] The working pipe can be installed by using a jacking construction method.

[0019] Preferably, the rear portion of the working pipe is disposed in the underground medium without a casing on the outside, and the front portion of the working pipe is disposed in a casing disposed in the underground medium. The working pipe can be divided into a front portion and a rear portion depending on whether the casing is disposed on the outside.

[0020] Preferably, the inner diameter of the sleeve is larger than the outer diameter of the working tube, and the gap between the sleeve and the working tube is filled by sandblasting.

[0021] The underground pipeline disclosed by the present invention can be set up by the following jacking construction method: during the jacking construction, especially when the jacking of the working pipe is blocked, short-length excavation is carried out in the forward direction according to the assembly requirements of the steel pipe unit, and two single-piece pipes are delivered to (for example, transported to through the channel in the existing installed working pipe) the space excavated at the front end, and assembled into a single-section steel pipe (steel pipe unit). In the case that there is an installed steel pipe at the rear side, the assembled single-section steel pipe is connected to the front end of the installed steel pipe. After one or more sections of steel pipe are installed in this way, the front working pipe is pushed into the steel pipe, and the above process is continued until the working pipe is set up. The single-piece pipe is the single-piece pipe described in the steel pipe of the emergency replacement pipe jacking device disclosed by the present invention.

[0022] Furthermore, after the two monolithic tubes are delivered to the space excavated at the front end, the monolithic tube located at the bottom after splicing is first set, and the outer side of the monolithic tube located at the bottom is filled according to actual needs to achieve positioning support of the monolithic tube located at the bottom and filling of the surrounding gaps, and then the monolithic tube located at the top is matched (fastened) to the monolithic tube located at the bottom, so that the holes for setting fastening bolts on the straight folded edges that are matched with each other are aligned with each other, and the fastening bolts are passed through the aligned holes for setting fastening bolts, and the corresponding straight folded edges are fastened together, thereby realizing the assembly of single-section steel pipes.

[0023] Furthermore, when there is a steel pipe installed in place on the rear side, the two single-piece tubes in the assembled single-section steel pipe should be aligned with the two single-piece tubes on the steel pipe installed in place on the rear side, so that the holes for setting fastening bolts on the semicircular annular folding edges that are opposite to each other are aligned with each other, and the fastening bolts are passed through the aligned holes for setting fastening bolts to fasten the corresponding semicircular annular folding edges together, thereby realizing the connection of the spliced ​​single-section steel pipe at the front end of the installed steel pipe.

[0024] The beneficial effects of the present invention are as follows: the single-piece pipes that make up the steel spliced ​​pipe are of appropriate size, can be fed into the front end of the pipe through the hole in the reinforced concrete pipe, and are suitable for on-site assembly in underground holes to form an unobstructed hole that allows the reinforced concrete pipe to be jacked. During the pipe jacking construction process, if the pipe jacking is blocked or encounters other special circumstances, it is impossible to directly jack the working pipe into the underground medium. Then, manual excavation and installation of the steel spliced ​​pipe can be used in the pipe, and the subsequent construction of the pipe jacking work can be continued with the support of the steel spliced ​​pipe. This can effectively overcome the problems that hinder the pipe jacking construction due to poor geological conditions or long jacking distance, such as the jamming or rupture of the working pipe, and avoid losses caused by the inability to continue construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the underground pipeline (cross section) involved in the present utility model;

[0026] Figure 2 This is a schematic diagram of a single-piece tube (cross section) involved in the present utility model;

[0027] Figure 3 This is a schematic diagram of a monolithic tube (side view) involved in the present utility model;

[0028] Figure 4 This is a schematic diagram of a steel pipe (multiple sections, top view) involved in the utility model;

[0029] Figure 5 This is a schematic diagram of a steel pipe (multiple sections, side view) involved in the utility model;

[0030] Figure 6It is another embodiment of the underground pipeline (section) schematic drawing of the utility model. DETAILED DESCRIPTION

[0031] Referring to Figures 1-6 The single-section steel pipe 20 is composed of an upper single-piece pipe 21 and a lower single-piece pipe 22, and the upper and lower single-piece pipes have the same structure and can adopt the same single-piece pipe.

[0032] The single-piece pipe can be usually made of steel, and other suitable materials can also be adopted according to actual needs.

[0033] The main part of the single-piece pipe can be regarded as a half piece cut along an axis of a single-section steel pipe, and the edges of two sides and two ends are provided with folded edges, the folded edges provided on the edges of two sides are straight folded edges 24 for connecting two single-piece pipes in the same single-section steel pipe, and the folded edges provided on the edges of two ends are semicircular ring-shaped folded edges 23 for axial connection between adjacent single-section steel pipes. Meanwhile, the folded edges also play a role of rib plate reinforcement, and since the straight folded edges and the semicircular ring-shaped folded edges are connected in a closed (whole circle) structure, stress concentration or weak links of anti-deformation are avoided, which is beneficial to improving the overall strength of the single-piece pipe.

[0034] One or more intermediate rib plates 25 are arranged on the outer side of the single-piece pipe according to the reinforcement requirement. The intermediate rib plate is located between the straight folded edges in the circumferential direction, and the two ends (axial ends) are connected with the corresponding semicircular ring-shaped folded edges to form an integral whole, for further improving the strength of the single-piece pipe.

[0035] When the number of the intermediate rib plates is one, the intermediate rib plate is located at a circumferential intermediate position. In this case, the holes for arranging the fastening bolts on the semicircular ring-shaped folded edges can be staggered with the intermediate rib plate and arranged on one side of the intermediate rib plate. The positions of the holes for arranging the fastening bolts on the two semicircular ring-shaped folded edges located at the two ends of the single-piece pipe should be corresponding, so that when the two single-piece pipes are axially butted, the holes for arranging the fastening bolts on the semicircular ring-shaped folded edges of the two single-piece pipes that are in close contact with each other are aligned.

[0036] For the convenience of on-site assembly, the number of the holes for arranging the fastening bolts on the semicircular ring-shaped folded edges is one and located at the intermediate (circumferential intermediate) part of the semicircular ring-shaped folded edge, and the number of the holes for arranging the fastening bolts on the straight folded edges is two and located at the two end parts of the straight folded edge.

[0037] The single-piece pipe can be made by welding and processing in a factory according to the design specification size. For example, the inner diameter (the inner diameter of the steel pipe after splicing) DN1000mm, the wall thickness 3mm, the rib plate (each folded edge and the intermediate rib plate if provided) height 50mm, and the processing length is 500mm per section, and the weight of each single-piece pipe is 25Kg.

[0038] After the two single-piece pipes are folded together, the two groups of straight folded edges that are adhered to each other between the two single-piece pipes are fastened into one body by the bolts 27 to form a single-section steel spliced pipe (or a steel spliced pipe monomer).

[0039] A plurality of single-section steel spliced pipes (steel spliced pipe monomers) are connected in sequence in the axial direction to form a multi-section steel spliced pipe with a corresponding length.

[0040] In the assembly (connection) process of the multi-section steel spliced pipe, two single-piece pipes can be connected into a single-section steel spliced pipe first, and then the connected single-section steel spliced pipe is connected to an existing steel spliced pipe (single section or multi-section), or one single-piece pipe can be connected to a corresponding position of an existing steel spliced pipe (single section or multi-section) first, and then the other single-piece pipe is connected.

[0041] The inner diameter of the single-piece pipe / single-section steel spliced pipe is greater than the outer diameter of the working pipe (a pipe to be set in the pipe jacking construction, usually a reinforced concrete pipe, and other material pipes can also be used as appropriate) by 10, and the length can be significantly smaller than the length of the working pipe monomer (for example, a prefabricated reinforced concrete pipe) to adapt to short footage excavation.

[0042] The steel spliced pipe can improve the pipe jacking construction mode of underground pipes and expand the application range of the pipe jacking technology. For example, in the geological conditions prone to collapse or in the case of a long jacked pipe, it may be difficult / impossible to continue jacking the working pipe. In such cases, the steel spliced pipe can be used as a casing pipe for the working pipe, and a short footage and small range excavation method can be used to first open a forward (the forward of the jacked working pipe / steel spliced pipe or the forward of the starting point) hole (or tunnel) suitable for setting a single-section steel spliced pipe, set the single-section steel spliced pipe in the forward hole, and connect it with the existing steel spliced pipe (if any) located behind it. The single-section steel spliced pipe is formed by folding two single-piece pipes together. Since the size of the single-piece pipe is relatively small, it can pass through the existing working pipe and be transported to the front end of the hole. The single-section steel spliced pipe monomer is assembled in the forward hole, the two single-piece pipes are folded together, and the single-section steel spliced pipe is connected by bolts. The assembled single-section steel spliced pipe is connected with the existing steel spliced pipe located on the rear side (if there is a steel spliced pipe on the rear side). However, when the first section of the steel spliced pipe is set, there is no steel spliced pipe on the rear side, and there is no connection with the steel spliced pipe located on the rear side. The setting position of the steel spliced pipe should allow the working pipe to be jacked into the steel spliced pipe. Based on the convenience of operation and geological conditions, the jacking of the working pipe can be performed after setting a single-section steel spliced pipe in the forward direction, or the jacking of the working pipe can be performed after setting multiple-section steel spliced pipes in the forward direction (for example, when the length of the steel spliced pipe at the front end reaches the length of a single-section working pipe). After assembling one or more steel spliced pipes in the forward direction, the working pipe is pushed into the steel spliced pipe(s), and then the hole is excavated and the steel spliced pipe is set in the forward direction. In this way, the working pipe is continuously jacked by continuously extending the steel spliced pipe until the laying of the working pipe is completed.

[0043] Usually, steel pipes are not required at the beginning of construction. After direct pipe jacking is blocked, steel pipes are installed at the front end of the working pipe that has been jacked. With the help of steel pipes, subsequent operations of pipe jacking construction can be continued, so that the pipe jacking can be completed along the original route without changing or adjusting the route after being blocked. This greatly reduces the construction cost when direct pipe jacking is blocked, and the construction is convenient, the effect is good, and the construction period is guaranteed.

[0044] Through the above-mentioned construction method, the underground pipeline of the present invention can be constructed even in situations where the geological conditions are poor or the pipeline length is long.

[0045] The relevant operation methods mainly include:

[0046] 1) Transportation of monolithic pipes to the construction site: The factory prepares monolithic pipes according to the design specifications and transports them in batches according to the construction progress. Loading and unloading should be directed by a dedicated person and should be handled with care during unloading to prevent damage and deformation of the pipes, which may affect subsequent installation.

[0047] Place wooden pads on the bottom of the transport vehicle and wooden blocks between each monolithic tube to prevent damage to the monolithic tube due to strong collisions during transportation. Pay special attention to the protection of the ribs.

[0048] 2) In-pipe transport of monolithic pipes: Monolithic pipes are transported to the front end along the established working pipeline using an excavation trolley. When the excavation at the front end meets the installation requirements, the trolley can transport two monolithic pipes at a time.

[0049] When transporting in pipes, they must be tied to a trolley with straw ropes to prevent collision with surrounding pipes or falling.

[0050] 3) Single-section pipe splicing: The steel pipe and the working pipe are connected by inner diameter butt joint. The steel pipe is assembled from bottom to top. The lower single-piece pipe is installed first. The area within 120° outside the lower single-piece pipe is backfilled with medium-coarse sand, and then the upper single-piece pipe is installed. During the installation process, the position of the bolt holes between the upper and lower single-piece pipes should be adjusted at any time to ensure that the holes are aligned and the bolts are installed.

[0051] 4) Front and rear connection: Use M12 bolts to connect the two sections of steel pipes. Insert the bolts through the upper and lower screw holes and tighten them.

[0052] Typically, the mating surfaces 29 of the two monolithic tubes in the same steel pipe assembly can be generally horizontal. When appropriate, the mating surfaces of the two monolithic tubes in the same steel pipe assembly preferably have an angle β relative to the horizontal plane. This angle can be 0 to 45° (0 ≤ β ≤ 45°; when horizontal, β can be considered to be 0), for example, 10°, 20°, or 30°, to facilitate bolt tightening.

[0053] The lower piece single piece pipe is backfilled with medium coarse sand in a range of 120 degrees outside, sand blasting is used between the steel spliced pipe and the working pipe to ensure that the steel spliced pipe and the working pipe are densely filled.

[0054] After the single piece pipe is positioned, the hole centering condition is confirmed again before bolt installation, so as to ensure that the holes of the upper and lower pipes are aligned.

[0055] After installation, the gap between the sleeve pipe and the working pipe can be filled by sand blasting.

[0056] The underground pipeline thus constructed mainly comprises a working pipe and a sleeve pipe, wherein the working pipe is connected by socket connection of multiple working pipe units (usually reinforced concrete pipe units) 10, and the sleeve pipe is the steel spliced pipe of any one of the emergency replacement pipe jacking devices disclosed in the utility model.

[0057] Since in a normal situation, a certain distance of working pipe can be set by using conventional pipe jacking when starting construction, only in the case that the direct pipe jacking operation of the working pipe is blocked, etc., the steel spliced pipe needs to be set, therefore, the sleeve pipe composed of the steel spliced pipe is usually only located at the front part of the working pipe, and the outside of the rear part (the specific length depends on the actual situation) of the working pipe is not provided with the sleeve pipe.

[0058] The preferred and optional technical means disclosed in the utility model can be combined arbitrarily to form several different specific embodiments, except for the special description and the further limitation of one preferred or optional technical means to another technical means.

Claims

1. A steel pipe for emergency replacement of pipe jacking device, which is composed of one or more sections of steel pipe monomers, and the multiple sections of steel pipe monomers are connected in sequence along the axial direction, characterized in that The steel pipe monomer is formed by two single-piece pipes being matched together. The single-piece pipe is semi-circular in shape, with straight folded edges on both sides and semi-circular annular folded edges on both ends. The straight folded edges that match each other in the two single-piece pipes are fastened by fastening bolts, thereby achieving a fixed connection between the two single-piece pipes. The semi-circular annular folded edges that match each other in the two steel pipe monomers are fastened by fastening bolts, thereby achieving a fixed connection between the two steel pipe monomers. An axially extending middle rib is provided on the outer side of the single-piece pipe, and the number of the middle ribs is one or more, and the two ends are respectively connected to the semi-circular annular folded edges at the corresponding ends.

2. The steel pipe according to claim 1, characterized in that Sealing material is provided or not provided between the mutually facing straight folded edges of the two single-piece tubes.

3. The steel pipe according to claim 1, characterized in that There are two holes on the straight folding edge for arranging fastening bolts, and the holes are respectively located near the two ends of the straight folding edge.

4. The steel pipe according to claim 1, characterized in that Sealing material is provided or not provided between the semicircular annular folded edges that are aligned with each other in the two steel pipe units.

5. The steel pipe according to claim 1, characterized in that The number of holes for arranging fastening bolts on the semicircular ring fold is one and the hole is located in the middle of the semicircular ring fold.

6. The steel pipe according to claim 1, characterized in that The folded edges on the same single tube are connected end to end.

7. The steel pipe according to claim 1, characterized in that The monolithic tube is made of steel plate.

8. An underground pipeline using steel pipes, comprising a working pipe, wherein the working pipe is formed by connecting multiple sections of working pipes, characterized in that A casing is also provided, which is made of the steel pipe of the emergency replacement pipe jacking device according to any one of claims 1 to 7 and is sleeved on the outside of the working pipe.

9. The underground pipeline according to claim 8, characterized in that The rear portion of the working pipe is arranged in the underground medium, and no casing is arranged on the outside of the working pipe. The front portion of the working pipe is arranged in the casing, and the casing is arranged in the underground medium.

10. The underground pipeline according to claim 8 or 9, characterized in that The inner diameter of the sleeve is larger than the outer diameter of the working tube, and the gap between the sleeve and the working tube is filled by sandblasting.

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