Angle-adjusting pipe joint of prefabricated curved pipe and construction process

Abstract

This invention discloses a prefabricated curved pipe jacking section with adjustable angle and its construction process, comprising an inserted pipe section and a concrete pipe body. A connecting mechanism is provided on the front side of the inserted pipe section, and the connecting mechanism includes fixing grooves. The fixing grooves are located on the left and right sides of the front side of the inserted pipe section. A fixing plate is provided on the rear side of the inner cavity of the fixing groove. Fixing holes are provided around the front side of the fixing plate. The rear thread of a screw is threaded into the inner cavity of the inserted pipe section. ； The steel ring pump inlet is equipped with an adjuster. The beneficial effects of this invention are: by inserting the connecting rod into the inner cavity of the connecting groove, it is limited by a limiting block. Currently, curved pipe jacking uses soft soil pads added in the middle of the pipe sections to adjust the angle and achieve a straight jacking effect. This method lacks sufficient curve accuracy and cannot be adjusted according to geological conditions and working conditions after construction. By using connectors and adjusters installed between pipe sections for adjustment, the purpose of curved pipe jacking can be achieved, resulting in high adjustment accuracy and stable connection between pipes.

Description

Technical Field

[0001] This invention relates to the field of pipe jacking technology, specifically to a prefabricated curved pipe jacking angle-adjustable section and its construction process. Background Technology

[0002] Pipe jacking technology is a trenchless pipeline laying construction technique used in municipal construction. Common cross-sectional shapes include circular, rectangular, and irregular shapes. With the rapid development of urbanization, the utilization and demand for underground space are becoming increasingly prominent. Curved pipe jacking can meet the needs of subway entrances and underground utility tunnels, and its development prospects are becoming increasingly promising.

[0003] 1. A Chinese patent discloses a construction method for multi-curve, small-radius, micro-disturbance pipe jacking tunnels. Its features include at least the following steps: prefabricating pipe sections; processing wooden pads to form wedge-shaped combined gaskets; reinforcing the soil at the starting point of the bend and at the transition point of the curved pipe jacking; opening one side of the pipe section joint; and inserting combined gaskets between the pipe section joints. This invention is applicable to multi-curve pipe jacking construction in underground areas with surface structures or sensitive to ground settlement. It can form a small-radius multi-curve pipe jacking profile smaller than conventional curved pipe jacking, meeting underground obstacle avoidance requirements.

[0004] 2. A method for adjusting templates during the prefabrication of curved immersed tunnel sections (Publication No.: CN107599149B), comprising the following steps: 1) After lifting and leveling the bottom formwork, the folding plate is lifted to the same height as the bottom formwork; 2) The side formwork is pushed laterally to the design position for fine-tuning and positioning, and then retracted. After the top of the reinforcing cage is pushed in, the measurement is repeated; 3) The height and axis position of the inner formwork are adjusted, and after adjustment, the inner formwork is retracted. After the top of the reinforcing cage is pushed in, the measurement is repeated; 4) When installing the end formwork, it is hoisted in sections according to the order of bottom plate, wall, and top plate. Each end formwork is measured and positioned to ensure the end face dimensions of the immersed tunnel segment. The method in this invention can utilize existing straight section templates for the prefabrication of curved immersed tunnel sections and can meet the accuracy requirements of curved immersed tunnel prefabrication without the need to design and manufacture templates specifically for curved immersed tunnel sections. This is beneficial for reducing the construction cost of immersed tunnel prefabrication and has very important guiding significance for the design and construction of similar immersed tunnel projects.

[0005] Pipe jacking technology is frequently used in pipeline construction. Currently, curved pipe jacking with small curvature radius adopts the method of straight jacking on a curve, adding soft soil pads in the middle of the pipe section to adjust the angle. This method of pipe jacking does not have high curve accuracy, and it cannot be adjusted according to the stratum conditions and working conditions after construction, nor can it guarantee the structural safety of the pipe section port.

[0006] Therefore, those skilled in the art have provided a prefabricated curved jacking pipe angle adjustment section and construction process to solve the problems mentioned in the background art. Summary of the Invention

[0007] The technical problem to be solved by this invention is that the existing technology has the disadvantages of unstable connection between pipes and insufficient accuracy of curved pipe jacking. To address this, we propose a prefabricated curved pipe jacking angle adjustment section and construction process.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] An angle-adjustable pipe section for precast curved pipe jacking includes an insertion pipe section and a concrete pipe body. A connecting mechanism is provided on the front side of the insertion pipe section, and the connecting mechanism includes a fixing groove.

[0010] The fixing grooves are all opened on the left and right sides of the front of the inserted pipe section. A fixing plate is provided on the rear side of the inner cavity of the fixing groove. Fixing holes are opened on all four sides of the front side of the fixing plate. Screws are movably connected to the inner cavity of the fixing holes. The rear side of the screws is threaded into the inner cavity of the inserted pipe section. A fixing rod is fixedly connected to the front side of the fixing plate. A movable block is fixedly connected to the front side of the fixing rod. A connecting rod is movably connected to the front side of the movable block. Connecting grooves are opened on the left and right sides of the rear of the concrete pipe. The front side of the connecting rod is located in the inner cavity of the connecting groove. A threaded rod is movably connected to the inner cavity of the connecting groove. Limit blocks are threadedly connected to the surface of the threaded rod. A steel ring pump port is connected to the end face of the concrete pipe body. The steel ring pump port is equipped with an adjuster and a sealing strip.

[0011] As a further embodiment of the present invention: a connecting ring is fixedly connected to the surface of the concrete pipe body, and the inserted pipe section is movably connected to the inner cavity of the connecting ring.

[0012] As a further embodiment of the present invention: a soft pad is fixedly connected to the front side of the inserted pipe section, and the soft pad is movably connected to the rear side of the concrete pipe body.

[0013] As a further embodiment of the present invention: a knob is fixedly connected to the right side of the threaded rod, and anti-slip strips are fixedly connected to the surface of the knob.

[0014] As a further embodiment of the present invention: the upper and lower sides of the connecting groove are provided with sliding grooves, and the limiting block is movably connected in the inner cavity of the sliding groove.

[0015] A construction process for a prefabricated curved pipe jacking section with adjustable angle, comprising the following steps:

[0016] S1. By suspending the crane hook into the inner cavity of the fixed rod, the concrete pipe body is moved to a suitable position, and the front side of the inserted pipe section is moved to insert into the inner cavity of the connecting ring.

[0017] S2. The staff can manually rotate the knob to drive the threaded rod to rotate. The rotation of the threaded rod can drive the limit block to move inward along the inner cavity of the slide groove.

[0018] S3. Fix the inserted pipe section and the concrete pipe body. When it is necessary to adjust a certain angle, the soft pad will contract when the inserted pipe section is moved left and right by squeezing one side of the inserted pipe section, and the soft pad will extend on the other side.

[0019] S4. The movement of the inserted pipe section can drive the connecting rod to move along the movable block.

[0020] S5. The regulator adjusts the pipe section angle by means of telescopic length adjustment, and six units are combined in a group to adjust the pipe section angle. The regulator itself has the ability to resist high axial jacking force.

[0021] The beneficial effects of this invention are:

[0022] 1. This invention connects the inserted pipe section and the concrete pipe body by inserting the connecting rod into the inner cavity of the connecting groove and limiting it with a limiting block. This reduces the risk of the installed pipeline being displaced due to soil loosening caused by rainfall, soil impact, etc., resulting in a discontinuity in the pipeline connection and soil falling and causing pipeline blockage.

[0023] 2. This invention prevents the insertion pipe section and the concrete pipe body from moving during transportation. By setting a connecting ring, it can play an auxiliary role in docking the insertion pipe section and the concrete pipe body. By setting a fixing block and a suspension hole, it can fix the suspension hook when moving the insertion pipe section and the concrete pipe body with a crane. By setting a soft pad, it can adjust the angle of the insertion pipe section and the concrete pipe body to a certain extent.

[0024] 3. The present invention has 6 regulators, three on the left and three on the right. The extension and retraction length of the regulators can be adjusted. By adjusting the relative gap between the two pipes, the deflection can be achieved, thus achieving the purpose of curved pipe jacking. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the front structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the left side structure of the present invention;

[0027] Figure 3 This is a schematic cross-sectional view of the fixing groove structure of the present invention;

[0028] Figure 4 This is a cross-sectional view of the connecting groove structure of the present invention.

[0029] Figure 5 This is a flowchart of the construction process of the present invention.

[0030] The attached diagram shows the following labels: 1. Inserted pipe section; 2. Concrete pipe body; 3. Steel ring pump port; 4. Regulator; 8. Knob; 9. Connecting mechanism; 901. Fixing groove; 902. Screw; 903. Fixing plate; 904. Connecting rod; 905. Movable block; 906. Fixing hole; 907. Fixing rod; 908. Connecting groove; 909. Limiting block; 910. Threaded rod; 10. Soft pad; 11. Anti-slip strip; 12. Slide groove; 13. Sealing strip. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] like Figure 1 and combined Figures 2 to 5 As shown, a precast curved jacking pipe angle adjustment section includes an insertion section 1 and a concrete pipe body 2. A connecting mechanism 9 is provided on the front side of the insertion section 1. The connecting mechanism 9 includes a fixing groove 901.

[0035] Fixed grooves 901 are all opened on the left and right sides of the front of the insertion pipe section 1. A fixed plate 903 is provided on the rear side of the inner cavity of the fixed groove 901. Fixed holes 906 are opened on all four sides of the front side of the fixed plate 903. Screws 902 are movably connected to the inner cavity of the fixed holes 906. The rear side of the screws 902 is threaded into the inner cavity of the insertion pipe section 1. A fixed rod 907 is fixedly connected to the front side of the fixed plate 903. A movable block 905 is fixedly connected to the front side of the fixed rod 907. A connecting rod 904 is movably connected to the front side of the movable block 905. Connecting grooves 908 are opened on the left and right sides of the rear of the concrete pipe body 2. The front side of the connecting rod 904 is located in the inner cavity of the connecting groove 908. A threaded rod 910 is movably connected to the inner cavity of the connecting groove 908. Limit blocks 909 are threadedly connected to the surface of the threaded rod 910. A steel ring pump port 3 is connected to the end face of the concrete pipe body 2. The steel ring pump port 3 is provided with an adjuster 4 and a sealing strip 13. The steel ring pump inlet 3 can achieve angle adjustment between pipe sections, and the six adjusters 4 can resist high axial jacking force.

[0036] Through the above technical solution, after the connecting rod 904 is inserted into the inner cavity of the connecting groove 908, it is limited by the limiting block 909, thereby connecting the inserted pipe section 1 and the concrete pipe body 2. This reduces the risk that the installed pipeline may be displaced due to soil loosening caused by rainfall, the pipeline may be impacted by soil and shift, resulting in a break in the pipeline connection and soil falling and causing pipeline blockage.

[0037] The present invention has six regulators, three on the left and three on the right. The extension and retraction length of the regulators can be adjusted. By adjusting the relative gap between the two pipes, the deflection is achieved, thus achieving the purpose of curved pipe jacking.

[0038] Specifically, a connecting ring is fixedly connected to the surface of the concrete pipe body 2, and the pipe section 1 is movably connected to the inner cavity of the connecting ring 6.

[0039] The above technical solution, by setting a connecting ring, can play an auxiliary role in connecting the inserted pipe section 1 and the concrete pipe body 2.

[0040] Specifically, a soft pad 10 is fixedly connected to the front side of the inserted pipe section 1, and the soft pad 10 is movably connected to the rear side of the concrete pipe body 2.

[0041] Through the above technical solution, by setting the soft pad 10, the angle of the inserted pipe section 1 and the concrete pipe body 2 can be adjusted to a certain extent.

[0042] Specifically, a knob 8 is fixedly connected to the right side of the threaded rod 910, and anti-slip strips 11 are fixedly connected to the surface of the knob 8.

[0043] Through the above technical solution, by setting the knob 8 and the anti-slip strip 11, the threaded rod 910 can be rotated by the operator holding the knob 8 and the anti-slip strip 11 to prevent slipping.

[0044] Specifically, sliding grooves 12 are provided on both the upper and lower sides of the connecting groove 908, and the limiting block 909 is movably connected in the inner cavity of the sliding groove 12.

[0045] By using the above technical solution and by setting the slide groove 12, the movement of the limit block 909 can be made more stable.

[0046] A construction process for a prefabricated curved pipe jacking section with adjustable angle, comprising the following steps:

[0047] S1. By suspending the hook of the crane into the inner cavity of the fixed rod 907, the concrete pipe body 2 is moved to a suitable position, and the front side of the inserted pipe section 1 is moved to insert into the inner cavity of the connecting ring 6.

[0048] S2. The staff can manually rotate the knob 8 to drive the threaded rod 910 to rotate. The rotation of the threaded rod 910 can drive the limit block 909 to move inward along the inner cavity of the slide groove 12.

[0049] S3. Fix the inserted pipe section 1 and the concrete pipe body 2. When it is necessary to adjust a certain angle, the inserted pipe section 1 is moved left and right. When one side of the inserted pipe section 1 squeezes the soft pad 10, the soft pad 10 contracts and the soft pad 10 extends on the other side.

[0050] S4. The movement of the inserted pipe section 1 can drive the connecting rod 904 to move along the movable block 905.

[0051] S5. The regulator adjusts the pipe section angle by means of telescopic length adjustment, and six units are combined in a group to adjust the pipe section angle. The regulator itself has the ability to resist high axial jacking force.

[0052] The working principle is as follows: First, by suspending the crane hook into the inner cavity of the fixed rod 907, the concrete pipe body 2 is moved to a suitable position. Then, the front side of the inserted pipe section 1 is moved to insert into the inner cavity of the connecting ring 6, and the front end of the connecting rod 904 is moved into the inner cavity of the connecting groove 908. At this time, the operator manually rotates the knob 8 to drive the threaded rod 910 to rotate. The rotation of the threaded rod 910 can drive the limiting block 909 to move inward along the inner cavity of the slide groove 12, thereby limiting the connecting rod 904 and fixing the inserted pipe section 1 and the concrete pipe body 2. When a certain angle needs to be adjusted, when the inserted pipe section 1 is moved left and right, one side of the inserted pipe section 1 squeezes the soft pad 10, causing the soft pad 10 to contract, while the other side of the soft pad 10 extends, achieving a sealing effect. At the same time, the movement of the inserted pipe section 1 can drive the connecting rod 904 to move along the movable block 905, preventing the connection between the inserted pipe section 1 and the concrete pipe body 2 from being disconnected.

[0053] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A precast curved pipe jacking angle adjustment section, comprising an insertion section (1) and a concrete pipe body (2), characterized in that: The front side of the insertion tube section (1) is provided with a connecting mechanism (9), which includes a fixing groove (901). The fixing grooves (901) are all opened on the left and right sides of the front side of the insertion pipe section (1). A fixing plate (903) is provided on the rear side of the inner cavity of the fixing groove (901). Fixing holes (906) are opened on all four sides of the front side of the fixing plate (903). A screw (902) is movably connected to the inner cavity of the fixing hole (906). The rear side of the screw (902) is threaded into the inner cavity of the insertion pipe section (1). A fixing rod (907) is fixedly connected to the front side of the fixing plate (903). A movable block (905) is fixedly connected to the front side of the fixing rod (907). A connecting rod (904) is movably connected to the front side of the movable block (905). A connecting groove (908) is opened on the left and right sides of the rear side of the concrete pipe body (2). The front side of the connecting rod (904) is located in the inner cavity of the connecting groove (908). A steel ring pump port (3) is connected to the end face of the concrete pipe body (2), and the steel ring pump port (3) is equipped with an adjuster (4) and a sealing strip (13); a threaded rod (910) is movably connected to the inner cavity of the connecting groove (908), and a limit block (909) is threadedly connected to the surface of the threaded rod (910); a connecting ring (6) is fixedly connected to the surface of the concrete pipe body (2), and the insertion pipe section (1) is movably connected to the inner cavity of the connecting ring (6); a soft pad (10) is fixedly connected to the front side of the insertion pipe section (1), and the soft pad (10) is movably connected to the rear side of the concrete pipe body (2); a knob (8) is fixedly connected to the right side of the threaded rod (910), and an anti-slip strip (11) is fixedly connected to the surface of the knob (8); a sliding groove (12) is opened on both the upper and lower sides of the connecting groove (908), and the limit block (909) is movably connected to the inner cavity of the sliding groove (12); It also includes the construction process, the steps of which are as follows: S1. By suspending the hook of the crane into the inner cavity of the fixed rod (907), the concrete pipe body (2) is moved to a suitable position, and the front side of the inserted pipe section (1) is moved to insert the inner cavity of the connecting ring. S2. The staff manually rotates the knob (8) to drive the threaded rod (910) to rotate. The rotation of the threaded rod (910) can drive the limit block (909) to move inward along the inner cavity of the slide groove (12). S3. Fix the insertion pipe section (1) and the concrete pipe body (2). When it is necessary to adjust a certain angle, the insertion pipe section (1) is moved left and right. When one side of the insertion pipe section (1) squeezes the soft pad (10), the soft pad (10) contracts and the soft pad (10) on the other side extends. S4. The movement of the inserted pipe section (1) can drive the connecting rod (904) to move along the movable block (905); S5. The regulator adjusts the pipe section angle by means of telescopic length adjustment, and six units are combined in a group to adjust the pipe section angle. The regulator itself has the ability to resist high axial jacking force.

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