Underground precast concrete pipe grouting tensile anchoring system
Patent Information
- Application Number
- CN202611016749.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-09
- Publication Date
- 2026-10-16
AI Technical Summary
[0004]然而管节接头是结构薄弱点，接口处大多缺少环形钢筋受力骨架，轴向抗拉性能差，地基沉降、土体挤压易造成管口错位脱节，通过物理垫圈密封的方式，易出现老化开裂、持续渗漏，冲刷基底加剧沉降的情况，且管道内水流、土体侧压会在转弯、变径段产生较大轴向推力，使得管网无法形成稳定受力体系，长期推力作用下接头持续受拉，加速密封与钢筋结构破坏
本发明通过密封组件的设置，对两个混凝土管道的相接处进行连接密封，同时在免拆预制座和钢模板的配合使用下，对两个混凝土管道相接处形成相对封闭的浇筑空间，并在螺口式注浆头、锁固组件和防溢组件的配合使用下，对两个混凝土管道相接处的表面进行注浆加强，最后在回填层和混凝土止推墩的配合使用下，对混凝土管道进一步补强，即可达到密封严密、防渗和整体抗拉、抗移位的目的。
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Figure CN122920192A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of municipal pipeline construction technology, specifically relating to an underground precast concrete pipeline grouting tensile anchoring system. Background Technology
[0002] Precast underground concrete pipes are widely used in municipal and water conservancy networks. They are made up of multiple pipe sections spliced together and connected by pipe joints to achieve a sealed connection, and are used to transport water.
[0003] Pipelines are buried in the soil for a long time and bear the weight of the soil, the load of vehicles on the ground, the pressure of groundwater and the lateral compression of the soil. Therefore, the requirements for pipe strength, joint seepage prevention, overall tensile strength and displacement resistance are high.
[0004] However, pipe joints are structurally weak points. Most joints lack a ring-shaped steel reinforcement skeleton, resulting in poor axial tensile strength. Foundation settlement and soil compression can easily cause misalignment and disconnection of the pipe ends. Physical gasket sealing methods are prone to aging, cracking, and continuous leakage. The scouring of the base exacerbates settlement. Furthermore, the water flow and soil lateral pressure inside the pipe will generate significant axial thrust at bends and diameter changes, making it impossible for the pipe network to form a stable stress system. Under long-term thrust, the joints are continuously under tension, accelerating the damage to the seal and steel reinforcement structure. Summary of the Invention
[0005] The purpose of this invention is to provide an underground precast concrete pipe grouting tensile anchoring system to solve the above-mentioned technical problems.
[0006] The technical solution of this invention to solve the above-mentioned technical problems is as follows: An underground precast concrete pipe grouting tensile anchoring system includes a non-removable precast base located at the bottom of the junction of two concrete pipes. A sealing component is provided on the top of the non-removable precast base. The sealing component includes a polyurethane sealing layer covering the surface of the junction of the two concrete pipes. Multiple U-shaped steel reinforcement sections are circumferentially distributed on the surface of the junction of the two concrete pipes. The U-shaped steel reinforcement sections are embedded in the surface of the concrete pipes. Two O-shaped steel reinforcement rings are provided inside the cavity of each U-shaped steel reinforcement section. The surface of the O-shaped steel reinforcement rings is welded and fixed to the U-shaped steel reinforcement sections. Cement is poured to seal the junction of the two concrete pipes, and the cement seal completely covers the surface of the U-shaped steel reinforcement sections and the O-shaped steel reinforcement rings. The inner cavity of the precast concrete base is equipped with two steel templates. A screw-type grouting head is installed at the top of the joint of the two steel templates. A locking component is installed at the bottom of the screw-type grouting head. An overflow prevention component is installed in the inner cavity of the screw-type grouting head. An anchoring component is installed at the top of the precast concrete base. A backfill layer is installed below the multiple sets of concrete pipes. The backfill layer includes a crushed stone cushion layer. A fine stone leveling layer is laid on top of the crushed stone cushion layer. A concrete cover layer is poured on top of the fine stone leveling layer. The concrete cover layer covers the lower surface of the concrete pipes. A compacted plain soil layer is backfilled on the upper surface of the concrete pipes. A concrete thrust block is buried on the right side of the concrete pipes. Diagonal bracing masonry is built on the front and rear sides of the concrete thrust block.
[0007] Preferably, the locking assembly includes a mating pressure plate fixedly connected to a screw-type grouting head, the top of the steel template is provided with a mating groove adapted to the mating pressure plate, a sealing gasket is provided between the mating pressure plate and the mating groove, and the top and bottom of the sealing gasket are respectively tightly fitted to the mating pressure plate and the mating groove.
[0008] Preferably, two threaded pins are welded to the bottom of the inner cavity of the mating groove, and M-shaped clamps are fitted on the surfaces of two adjacent threaded pins. An annular groove adapted to the M-shaped clamps is opened on the surface of the threaded pins.
[0009] Preferably, the surface of the threaded pin is threaded with a first hexagonal nut, which is pressed onto the surface of the M-shaped clamp.
[0010] Preferably, the anti-overflow component includes a threaded cap threaded to the top of the screw-type grouting head, a threaded rotating rod threadedly connected to the center of the threaded cap, a rubber plug fixedly connected to the bottom of the threaded rotating rod, and a rubber pressure ring sleeved on the surface of the threaded rotating rod.
[0011] Preferably, both sides of the top of the mating pressure plate are fixedly connected to exhaust nozzles, and an exhaust hole communicating with the inner cavity of the exhaust nozzle is opened at the bottom of one side of the exhaust nozzle.
[0012] Preferably, the inner cavity of the exhaust nozzle is provided with a slidable rubber stop, the rubber stop is sealed at the bottom of the inner cavity of the exhaust nozzle, and a spring is sleeved on the surface of the rubber stop, the top and bottom of the spring contacting the exhaust nozzle and the rubber stop respectively.
[0013] Preferably, the anchoring assembly includes threaded rods embedded in the four corners of the top of the prefabricated base that can be disassembled. The top of the threaded rod extends through to the top of the steel template. The surface of the threaded rod is threaded with a second hexagonal nut, and the bottom of the second hexagonal nut is tightly pressed against the surface of the connecting ear plate of the steel template.
[0014] Preferably, the front and rear sides of the prefabricated base cavity are integrally cast with rectangular slots that are compatible with the steel template, and two anchor rods are installed through the front and rear sides of the bottom of the prefabricated base cavity.
[0015] Preferably, two sealing strips are embedded in the inner wall of the steel formwork, and the surface of the sealing strips is in close contact with the surface of the concrete pipe.
[0016] The beneficial effects of this invention are: This invention uses a sealing component to seal the joint of two concrete pipes. Simultaneously, with the combined use of a precast, non-removable base and steel formwork, a relatively enclosed pouring space is formed at the joint. Furthermore, with the combined use of a screw-type grouting head, locking components, and anti-overflow components, the surface of the joint is reinforced with grout. Finally, with the combined use of a backfill layer and concrete thrust blocks, the concrete pipes are further reinforced, achieving a tight seal, impermeability, and overall tensile and displacement resistance. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the front cross-sectional structure of the present invention; Figure 2 This is a structural schematic diagram of the concrete pipe, the precast non-removable base, the sealing component, and the concrete thrust block in this invention. Figure 3 This is a schematic diagram of the concrete pipe, the prefabricated base that does not need to be disassembled, the sealing component, and the anchoring component in this invention. Figure 4 This is an exploded structural diagram of the concrete pipe and sealing assembly in this invention; Figure 5 This is a schematic diagram of the concrete pipe and cement encapsulation structure in this invention; Figure 6 This is a schematic diagram of the structure of the concrete pipe, the precast base that does not need to be dismantled, the steel formwork, and the screw-type grouting head in this invention; Figure 7This is a schematic diagram of the steel template, screw-type grouting head, locking assembly, and anti-overflow assembly in this invention; Figure 8 This is an exploded structural diagram of the steel template and screw-type grouting head in this invention; Figure 9 for Figure 8 Enlarged view of point A in the middle; Figure 10 This is a schematic diagram of the main sectional view of the screw-type grouting head and anti-overflow component in this invention; Figure 11 This is an exploded structural diagram of the anchoring component in this invention. Detailed Implementation
[0018] To clearly illustrate the technical features of this solution, the following detailed implementation method, in conjunction with its accompanying drawings, will be used to describe the solution.
[0019] Underground precast concrete pipe grouting tensile anchoring system, such as Figures 1-11 As shown, the assembly includes a precast, non-removable base 2 located at the bottom of the junction of two concrete pipes 1. A sealing component 3 is provided on the top of the precast, non-removable base 2. The sealing component 3 includes a polyurethane sealing layer 31 covering the surface of the junction of the two concrete pipes 1. Multiple U-shaped steel bar sections 32 are distributed in a ring on the surface of the junction of the two concrete pipes 1. The U-shaped steel bar sections 32 are embedded in the surface of the concrete pipes 1. Two O-shaped steel bar rings 33 are provided in the inner cavity of the U-shaped steel bar sections 32. The surface of the O-shaped steel bar rings 33 and the U-shaped steel bar sections 32 are welded and fixed. Cement seal 34 is poured at the junction of the two concrete pipes 1, and the cement seal 34 completely covers the surface of the U-shaped steel bar sections 32 and the O-shaped steel bar rings 33.
[0020] The inner cavity of the precast concrete base 2 is equipped with two steel templates 4. Two sealing strips 12 are embedded in the inner wall of the steel templates 4. The surface of the sealing strips 12 is in close contact with the surface of the concrete pipe 1. A screw-type grouting head 5 is provided at the top of the joint of the two steel templates 4. A locking component 6 is provided at the bottom of the screw-type grouting head 5. An anti-overflow component 7 is provided in the inner cavity of the screw-type grouting head 5. An anchoring component 8 is provided at the top of the precast concrete base 2. A backfill layer 9 is provided below the multiple sets of concrete pipes 1.
[0021] The backfill layer 9 includes a crushed stone cushion layer 91, a fine stone leveling layer 92 is laid on top of the crushed stone cushion layer 91, a concrete cover layer 93 is poured on top of the fine stone leveling layer 92, the concrete cover layer 93 covers the lower surface of the concrete pipe 1, the upper surface of the concrete pipe 1 is backfilled with a plain soil compaction layer 94, a concrete thrust block 10 is buried on the right side of the concrete pipe 1, and diagonal bracing masonry 11 is built on the front and rear sides of the concrete thrust block 10.
[0022] The locking assembly 6 includes a mating pressure plate 61 fixedly connected to the screw-type grouting head 5. The top of the steel template 4 is provided with a mating groove 62 that is adapted to the mating pressure plate 61. A sealing gasket 64 is provided between the mating pressure plate 61 and the mating groove 62. The top and bottom of the sealing gasket 64 are tightly fitted to the mating pressure plate 61 and the mating groove 62, respectively. Two threaded pins 63 are welded to the bottom of the inner cavity of the mating groove 62. An M-shaped clamp 65 is fitted on the surface of two adjacent threaded pins 63. An annular groove 66 adapted to the M-shaped clamp 65 is provided on the surface of the threaded pin 63. A first hexagonal nut 67 is threadedly connected to the surface of the threaded pin 63. The first hexagonal nut 67 is pressed onto the surface of the M-shaped clamp 65. The use of the mating pressure plate 61 and the mating groove 62 allows the screw-type grouting head 5 to quickly connect with the inner cavity of the steel template 4, conveying the grout. At the same time, the use of the threaded pin 63, M-shaped clamp 65 and first hexagonal nut 67 connects and locks the screw-type grouting head 5 and the steel template 4, improving the stability of the screw-type grouting head 5 during the grouting process. Meanwhile, the sealing gasket 64 seals the connection between the mating pressure plate 61 and the mating groove 62, effectively preventing grout leakage at the connection point during the grouting process.
[0023] The anti-overflow component 7 includes a threaded cap 71 threadedly connected to the top of the threaded grouting head 5. A threaded rotating rod 72 threadedly connected to the middle of the threaded cap 71 is provided. A rubber plug 73 is fixedly connected to the bottom of the threaded rotating rod 72. A rubber pressure ring 74 is sleeved on the surface of the threaded rotating rod 72. Vents 75 are fixedly connected to both sides of the top of the mating pressure plate 61. A vent hole 76 communicating with the inner cavity of the vent 75 is opened at the bottom of one side. A slidable rubber stop 77 is provided in the inner cavity of the vent 75. The rubber stop 77 is sealed at the bottom of the inner cavity of the vent 75. A spring 78 is sleeved on the surface of the rubber stop 77. The top and bottom ends of the spring 78 are in contact with the vent 75 and the rubber stop 77, respectively. The threaded cap 71 and threaded rod 72 work together to push the rubber plug 73 forward. After grouting, the inner cavity of the threaded grouting head 5 can be sealed, effectively preventing grout backflow. The threaded cap 71 also facilitates the subsequent removal of the threaded grouting head 5 and the treatment of its inner cavity. The vent nozzle 75 and vent hole 76 work together to expel gas from the inner cavity of the steel formwork 4, ensuring sufficient air pressure for grout injection. The rubber stopper 77 and spring 78 work together to squeeze out gas from the inner cavity of the vent nozzle 75, improving the internal filling of the grout, preventing cavitation or voids, and avoiding uneven structural strength after curing.
[0024] The anchoring assembly 8 includes threaded rods 81 embedded at the four corners of the top of the precast concrete base 2. The top of the threaded rods 81 extends to the top of the steel template 4. A second hexagonal nut 82 is threaded onto the surface of the threaded rods 81. The bottom of the second hexagonal nut 82 is tightly pressed against the connecting ear plate surface of the steel template 4. Rectangular slots 83, adapted to the steel template 4, are integrally cast on the front and rear sides of the inner cavity of the precast concrete base 2. Two anchor rods 84 are inserted through the front and rear sides of the bottom of the inner cavity of the precast concrete base 2. Through the combined use of the threaded rods 81 and the second hexagonal nut 82, the steel template 4 is connected and fixed, improving its stability during grouting. Simultaneously, the anchor rods 84 provide temporary anchoring for the precast concrete base 2, ensuring stable support for the concrete pipe 1 when backfilling is not yet complete.
[0025] Construction process of the underground precast concrete pipe grouting tensile anchoring system in this invention: (1) The crushed stone cushion layer 91 and the fine stone leveling layer 92 are pre-leveled. Then, multiple sets of non-removable precast seats 2 are laid at equal intervals on the top of the fine stone leveling layer 92. Anchor rods 84 are inserted from top to bottom to the bottom of the non-removable precast seats 2 and implanted into the interior of the fine stone leveling layer 92 to anchor the non-removable precast seats 2. Then, concrete pipes 1 are laid on the top of the non-removable precast seats 2 to ensure that the joint of the two concrete pipes 1 is located at the center of the top of the non-removable precast seats 2. (2) Apply polyurethane sealing layer 31 to the contact surface of the two concrete pipes 1 for sealing treatment. Then drill holes on the surface of the concrete pipe 1 and insert U-shaped steel bar section 32 into the hole on the surface of the concrete pipe 1. Anchor it with chemical bolts. Then insert O-shaped steel bar ring 33 into the inner cavity of U-shaped steel bar section 32 so that O-shaped steel bar ring 33 surrounds the surface of the concrete pipe 1. Weld and fix U-shaped steel bar section 32 and O-shaped steel bar ring 33. Then insert steel template 4 into the inner cavity of the precast base 2 so that steel template 4 is simultaneously inserted into the inner cavity of rectangular slot 83. Rotate the second hexagonal nut 82 thread on the surface of threaded rod 81 to fix steel template 4. At this time, steel template 4 tightly wraps around the surface of concrete pipe 1 and squeezes sealing strip 12 to seal the contact position of steel template 4 and concrete pipe 1, so that the two steel templates 4 and the precast base 2 form a relatively closed pouring space on the surface of concrete pipe 1. (3) Insert the screw-type grouting head 5 into the inner cavity of the mating groove 62 and squeeze the sealing gasket 64. Then, clamp the M-shaped clamp 65 on the surface of the threaded pin 63 to ensure that the M-shaped clamp 65 is fastened in the inner cavity of the annular groove 66 and tighten the front and rear positions of the two concrete pipes 1. Finally, rotate the first hexagonal nut 67 on the surface of the threaded pin 63 to press and fix the M-shaped clamp 65. Then connect the grouting machine to the screw-type grouting head 5 and grout into the inner cavity of the screw-type grouting head 5. The grout enters the inner cavity of the two steel templates 4 from the inner cavity of the screw-type grouting head 5, so that the grout completely covers the joint of the two concrete pipes 1 and completely covers the U-shaped steel bar section 32 and the O-shaped steel bar ring 33. (4) After grouting is completed, rotate the threaded rod 72 so that the threaded rod 72 drives the rubber plug 73 to press down and seal the inner cavity of the screw-type grouting head 5, effectively preventing the grout from flowing back from the inner cavity of the screw-type grouting head 5. During the grouting process, the gas in the inner cavity of the steel template 4 is discharged from the inner cavity of the exhaust hole 76 and the exhaust nozzle 75 to ensure that the grouting is full and dense. After the grout is completely formed, the steel template 4 and the screw-type grouting head 5 are removed. After the formed grout is solidified, a cement seal 34 is formed. (5) According to the actual laying requirements, an intermittent reinforcement method can be adopted to further strengthen the contact position of the two concrete pipes 1. The concrete thrust block 10 is hoisted and laid to the contact surface of the two concrete pipes 1. Then, the inclined bracing masonry 11 is built on the front and rear sides of the concrete thrust block 10 to further support and strengthen the concrete thrust block 10. Finally, a concrete burial layer 93 is poured in the inner cavity of the concrete thrust block 10 and on the lower surface of the concrete pipe 1. After the concrete burial layer 93 has solidified, a plain soil compaction layer 94 is backfilled on the surface of the concrete burial layer 93 to complete the overall laying and reinforcement construction.
[0026] Technical features not described in this invention can be implemented using existing technologies and will not be elaborated upon here. This invention is not limited to the specific embodiments described above; any changes, modifications, additions, or substitutions made by those skilled in the art within the scope of this invention should also fall within the protection scope of this invention.
Claims
1. An underground precast concrete pipe grouting tensile anchoring system, characterized in that, The system includes a precast, non-removable base (2) located at the bottom of the junction of two concrete pipes (1). A sealing assembly (3) is provided on the top of the precast, non-removable base (2). The sealing assembly (3) includes a polyurethane sealing layer (31) covering the surface of the junction of the two concrete pipes (1). Multiple U-shaped steel sections (32) are circumferentially distributed on the surface of the junction of the two concrete pipes (1). The U-shaped steel sections (32) are embedded in the surface of the concrete pipes (1). Two O-shaped steel rings (33) are provided inside the cavity of the U-shaped steel section (32). The surface of the O-shaped steel rings (33) is welded and fixed to the U-shaped steel section (32). Cement sealant (34) is poured at the junction of the two concrete pipes (1). The cement sealant (34) completely covers the surface of the U-shaped steel section (32) and the O-shaped steel rings (33). Two steel templates (4) are provided inside the cavity of the precast, non-removable base (2). A screw-type grouting head (5) is provided at the top of the joint of the steel formwork (4). A locking component (6) is provided at the bottom of the screw-type grouting head (5). An anti-overflow component (7) is provided in the inner cavity of the screw-type grouting head (5). An anchoring component (8) is provided at the top of the precast base (2). A backfill layer (9) is provided below the multiple sets of concrete pipes (1). The backfill layer (9) includes a crushed stone cushion layer (91). The top of the crushed stone cushion layer (91) is... A fine stone leveling layer (92) is laid on the bottom, and a concrete cover layer (93) is poured on top of the fine stone leveling layer (92). The concrete cover layer (93) covers the lower surface of the concrete pipe (1). The upper surface of the concrete pipe (1) is backfilled with a plain soil compaction layer (94). A concrete thrust block (10) is buried on the right side of the concrete pipe (1). The front and rear sides of the concrete thrust block (10) are both built with diagonal bracing masonry (11).
2. The underground precast concrete pipe grouting tensile anchoring system according to claim 1, characterized in that, The locking assembly (6) includes a docking pressure plate (61) fixedly connected to the screw-type grouting head (5). The top of the steel template (4) is provided with a docking groove (62) that is adapted to the docking pressure plate (61). A sealing gasket (64) is provided between the docking pressure plate (61) and the docking groove (62). The top and bottom of the sealing gasket (64) are tightly fitted to the docking pressure plate (61) and the docking groove (62) respectively.
3. The underground precast concrete pipe grouting tensile anchoring system according to claim 2, characterized in that, Two threaded pins (63) are welded to the bottom of the inner cavity of the mating groove (62). M-shaped clamps (65) are fitted on the surfaces of two adjacent threaded pins (63). An annular groove (66) adapted to the M-shaped clamps (65) is opened on the surface of the threaded pins (63).
4. The underground precast concrete pipe grouting tensile anchoring system according to claim 3, characterized in that, The threaded pin (63) is threadedly connected to a first hexagonal nut (67), which is pressed against the surface of the M-shaped clamp (65).
5. The underground precast concrete pipe grouting tensile anchoring system according to claim 4, characterized in that, The anti-overflow component (7) includes a threaded cap (71) threadedly connected to the top of the threaded grouting head (5). A threaded rotating rod (72) threadedly connected to the threaded cap (71) is provided through the middle of the threaded cap (71). A rubber plug (73) is fixedly connected to the bottom of the threaded rotating rod (72). A rubber pressure ring (74) is sleeved on the surface of the threaded rotating rod (72).
6. The underground precast concrete pipeline grouting tensile anchoring system according to claim 5, characterized in that, Both sides of the top of the mating pressure plate (61) are fixedly connected with exhaust nozzles (75), and an exhaust hole (76) communicating with its inner cavity is opened at the bottom of one side of the exhaust nozzle (75).
7. The underground precast concrete pipe grouting tensile anchoring system according to claim 6, characterized in that, The inner cavity of the exhaust nozzle (75) is provided with a sliding rubber stop (77), which is sealed at the bottom of the inner cavity of the exhaust nozzle (75). A spring (78) is sleeved on the surface of the rubber stop (77), and the top and bottom ends of the spring (78) are in contact with the exhaust nozzle (75) and the rubber stop (77) respectively.
8. The underground precast concrete pipe grouting tensile anchoring system according to claim 7, characterized in that, The anchoring assembly (8) includes threaded rods (81) embedded in the top four corners of the prefabricated base (2) without disassembly. The top of the threaded rods (81) extends through to the top of the steel template (4). The surface of the threaded rods (81) is threaded with a second hexagonal nut (82). The bottom of the second hexagonal nut (82) is tightly pressed against the surface of the connecting ear plate of the steel template (4).
9. The underground precast concrete pipe grouting tensile anchoring system according to claim 8, characterized in that, The front and rear sides of the cavity of the precast base (2) are integrally cast with rectangular slots (83) that are compatible with the steel template (4). Two anchor rods (84) are installed through the front and rear sides of the bottom of the cavity of the precast base (2).
10. The underground precast concrete pipe grouting tensile anchoring system according to claim 9, characterized in that, Two sealing strips (12) are embedded in the inner wall of the steel template (4), and the surface of the sealing strips (12) is in close contact with the surface of the concrete pipe (1).