Intelligent grouting system for pipe jacking construction
The design of the intelligent grouting system solves the difficulties and environmental problems of the mud circulation system in pipe jacking construction, realizes the efficient recycling and resource treatment of mud and water, ensures construction safety and stability, reduces costs and meets environmental protection requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- MUNICIPAL ENVIRONMENTAL CONSTR CO LTD OF CREC
- Filing Date
- 2026-02-11
- Publication Date
- 2026-05-08
AI Technical Summary
Existing mud circulation systems have problems in pipe jacking construction, such as difficulty in setting up mud pits, low solids control efficiency, easy to exceed the standard for mud sand content, limited ventilation in underground spaces, and difficulty in meeting environmental protection standards for volatile organic compound emissions, especially in narrow underground spaces such as underground sewage treatment plants.
An intelligent grouting system was designed, including a working well for pipe jacking construction, a mud-water circulation mechanism, a water-stopping mechanism at the tunnel entrance, a jacking mechanism, and a grouting mechanism. By integrating mud pumping, pipeline switching, and solid-liquid separation functions, the system realizes the recycling and resource-based treatment of mud and water. Combined with pressure sensors to monitor mud performance, and the use of biodegradable polymer additives, the system ensures stable sealing pressure, provides sealing effect, and stabilizes the soil structure.
It achieves efficient recycling of mud and water, reduces construction costs and environmental risks, ensures the safety and stability of the construction area, improves water resource utilization, reduces construction damage to the ground surface, and meets environmental protection standards.
Smart Images
Figure CN121993210A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of pipe jacking construction equipment, specifically relating to an intelligent grouting system for pipe jacking construction. Background Technology
[0002] Pipe jacking is an underground pipeline construction method developed after shield tunneling. It is a pipeline burial technology that requires little or no excavation. It does not require excavation of the surface layer and can cross highways, railways, rivers, surface buildings, underground structures, and various underground pipelines. Pipe jacking construction involves using the jacking force generated by jacking equipment in the working pit to overcome the friction between the pipeline and the surrounding soil, pushing the pipeline into the ground at the designed slope, and then removing the excavated soil. After one section of the pipe is pushed into the soil layer, the second section is pushed in to continue jacking. The principle is to use the thrust of the main jacking cylinder and the pipeline and intermediate sections to push the tool pipe or tunneling machine from the working pit through the soil layer to the receiving pit and lift it out. The pipeline follows the tool pipe or tunneling machine and is buried between the two pits to achieve a trenchless underground pipeline laying method. During the pipe jacking construction process, the soil produced at the machine head needs to be transported to the working shaft through the already jacked pipe channel for discharge.
[0003] Existing mud circulation systems face challenges in narrow underground space construction, such as difficulties in setting up mud pits and low solids control efficiency. Due to the burial depth of underground box structures in buried sewage treatment plants reaching 15 to 20 meters, conventional mud circulation processes result in spatial conflicts between mud pipeline layout and structural steel reinforcement mesh. This can lead to problems such as excessive sand content in the mud causing abnormal shutdowns during pipe jacking. Furthermore, ventilation in underground spaces is limited, and the emissions of volatile organic compounds generated during mud treatment are difficult to meet environmental protection standards in ecologically sensitive areas.
[0004] Therefore, there is an urgent need to provide an intelligent grouting system for pipe jacking construction to solve the above problems. Summary of the Invention
[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an intelligent grouting system for pipe jacking construction.
[0006] The technical solution adopted to solve the above technical problems is: an intelligent grouting system for pipe jacking construction, including a pipe jacking construction working well, a steel back support fixedly installed on one side of the inner wall of the pipe jacking construction working well, and a front wall cast on the other side of the inner wall of the pipe jacking construction working well.
[0007] The working shaft for pipe jacking is equipped with a jacking mechanism for pipe jacking, and one side of the front wall is equipped with a water-stopping mechanism for providing a sealing effect.
[0008] The outer side of the pipe jacking construction working shaft is equipped with a mud-water circulation mechanism to realize mud-water recycling, and the outer side of the pipe jacking construction working shaft is equipped with a grouting mechanism that combines mud-water pressure monitoring to adjust the mud injection volume in real time.
[0009] The mud and water circulation mechanism is equipped with a connection mechanism for quick installation of pipes.
[0010] Furthermore, the jacking mechanism includes a jack fixed to one side of the steel rear seat, a cylinder frame fixed to the outside of the jack and fixedly connected to the steel rear seat, and a jacking iron fixed to one end of the piston rod of the jack.
[0011] Through the above technical solution, the rear wall of the working shaft of the pipe jacking construction is made of C fine stone concrete cast in place. Then, the steel rear support is fixed on the front plane of the rear wall and ensured to be perpendicular to the jacking axis. Next, the jack is fixed to one side of the steel rear support and the hydraulic cylinder frame is used to fix it to the steel rear support to ensure the stability of the jack. The jack drives the jack iron to move.
[0012] Furthermore, a guide rail is fixed to the inner bottom wall of the pipe jacking construction working shaft, the top of the guide rail is tightly fitted with the pipe jacking machine, and a prefabricated pipe is tightly fitted to one side of the pipe jacking machine.
[0013] Using the above technical solution, a guide rail made of welded steel sections and steel plates is fixed to the inner bottom wall of the working shaft of the pipe jacking construction using anchor bolts. C-grade fine stone concrete is poured between the bottom of the guide rail and the foundation to make it firm. Then, the pipe jacking machine is placed on the top of the guide rail, so that it fits tightly against the guide rail. The precast pipe is then placed on one side of the pipe jacking machine, so that it fits tightly against the pipe jacking machine as well. The jacking iron pushes the precast pipe and the pipe jacking machine to move along the direction of the guide rail, thus completing the pipe jacking construction operation.
[0014] Furthermore, a ventilation pipe is provided on one side of the inside of the precast pipe, and a main cable is provided on the other side of the inside of the precast pipe. An LED light strip is suspended on one side of the inner wall of the precast pipe by a hook.
[0015] The above technical solution involves prefabricated pipes containing main cables and ventilation pipes. The cables and pipes are arranged separately on both sides, with a one-meter slack cable left at the relay station for the main cable. The ventilation pipes are fitted with bellows-style corrugated pipes at the relay station, and LED light strips are hung on the inner wall of the pipes using special hooks.
[0016] Furthermore, the opening water-stopping mechanism includes a single-layer curtain rubber sheet fixed to one side of the front wall by pre-embedded bolts, and a grouting steel pipe is pre-embedded and cast inside the front wall. Both ends of the grouting steel pipe are pre-drilled holes, and an external square plug is threaded onto one end of the grouting steel pipe.
[0017] Through the above technical solution, the opening water-stopping mechanism installs a single-layer cord rubber sheet through a pre-embedded steel ring in the front wall. The single-layer cord rubber sheet has good flexibility and sealing performance, can adapt to deformation at the opening, and effectively prevent water penetration. At the same time, a pre-embedded grouting steel pipe is used to inject cement grout into the opening to fill the gaps around the opening, forming a solid waterproof layer and enhancing the density and impermeability of the entire opening water-stopping structure. The reserved hole ensures that the pre-embedded grouting steel pipe will not affect the prefabricated pipe and the pipe jacking operation of the pipe jacking machine. The function of the external threaded plug is to seal one end of the grouting steel pipe when grouting is not required.
[0018] Furthermore, the mud-water circulation mechanism includes a mud purification device located on one side of the top of the working shaft during pipe jacking construction. The inlet of the mud purification device is fixedly connected to a water replenishment pump via a pipeline, and the outlet of the mud purification device is fixedly connected to a mud inlet pump via a pipeline. A mud inlet pipe is fixed between the outlet of the mud inlet pump and the mud-water chamber of the pipe jacking machine.
[0019] Through the above technical solution, the water replenishment pump is placed at the water source, preferably a non-clogging sewage pump. Its main function is to replenish water for the mud purification device, ensuring a stable water supply in the entire mud-water circulation system. The mud purification device integrates a surface vibrating screen and a cyclone separator, which can efficiently separate rock debris from the mud-water to obtain relatively clean water. The mud inlet pump is a slurry pump, which is used to transport the purified water to the mud-water chamber of the pipe jacking machine to maintain the pressure balance in the mud-water chamber during pipe jacking construction, ensuring the normal advancement of the pipe jacking, realizing the recycling of mud-water, greatly improving the utilization rate of water resources, reducing water consumption during construction, and lowering costs.
[0020] Furthermore, the sludge outlet of the sludge chamber of the pipe jacking machine is fixed with a relay pump via a pipeline, the sludge outlet of the relay pump is fixed with a sludge discharge pump via a pipeline, and a sludge discharge pipe is fixed between the sludge outlet of the sludge discharge pump and the sludge inlet of the sludge purification device.
[0021] Through the above technical solution, the mud pump is also a slurry pump, and both the mud pump and the mud pump are equipped with frequency converters to adjust the speed, which can more flexibly control the flow and pressure of the mud-water circulation, thereby better maintaining the stability of the mud-water pressure at the tunnel face and ensuring the smooth progress of pipe jacking construction. The relay pump set in the relay room plays a relay pumping role in long-distance pipe jacking construction, which helps to maintain the stable flow of mud in the entire circulation system, further stabilize the mud-water pressure at the tunnel face, and prevent problems such as insufficient mud-water pressure or excessive fluctuations caused by long-distance transportation.
[0022] Furthermore, the grouting mechanism includes a grout storage tank located on the other side of the top of the pipe jacking construction well. Two mixing tanks are provided on one side of the grout storage tank. Two grouting pumps are fixed at the grout outlet of the grout storage tank. A first grouting pipe is fixed at the grout outlet of one grouting pump, with one end penetrating and extending into the interior of the precast pipe. A second grouting pipe is fixed at the grout outlet of the other grouting pump, with one end penetrating and extending into the interior of the precast pipe.
[0023] The above technical solution involves first starting two mixing tanks to fully mix the pre-mixed cement slurry. After mixing, the cement slurry is transported to a storage tank for storage. When grouting is required, two grouting pumps are turned on, so that the cement slurry in the storage tank is transported out along the first grouting pipe and the second grouting pipe under the pressure of the grouting pumps.
[0024] Furthermore, pressure gauges are fixed inside both the first and second grouting pipes, and grouting branch pipes are fixed outside both the first and second grouting pipes. Grouting holes connected to the grouting branch pipes are provided inside the precast pipes. High-pressure water pipes are provided inside both the first and second grouting pipes, and sealing pipes are provided inside the high-pressure water pipes.
[0025] Through the above technical solution, a grouting branch pipe is set every 7.5 meters for the first grouting pipe and every 2.5 meters for the second grouting pipe. A pressure gauge is set every three grouting branch pipes. During the grouting process, the pressure gauges on the first and second grouting pipes can monitor the grouting pressure in the pipes in real time. Construction personnel can adjust the working parameters of the grouting pump in a timely manner based on the data fed back by the pressure gauges, thereby accurately controlling the amount of cement grout injected. This ensures that the cement grout is evenly injected into the soil around the precast pipe, guaranteeing the stability of the soil. The setting of high-pressure water pipes and sealing pipes helps to achieve effective sealing operations under appropriate pressure conditions, avoiding problems such as grout leakage, and ensuring the safety and smooth progress of the entire pipe jacking construction process.
[0026] Furthermore, the connecting mechanism includes pipe ends fixed to both ends of the two sludge discharge pipes, a sealing ring is installed between the two pipe ends, a first retaining ring is snapped onto one side of the two pipe ends, and a second retaining ring is snapped onto the other side of the two pipe ends. Two fixing bolts are installed on the internal threads of the first retaining ring and the second retaining ring.
[0027] Using the above technical solution, a sealing ring is placed between the pipe ends of the two sludge discharge pipes. Then, the first retaining ring is snapped into the designated position on the outside of the two pipe ends, and the second retaining ring is snapped into the corresponding position on the outside of the two pipe ends, ensuring that the two retaining rings are opposite and accurately positioned. Finally, the fixing bolt is rotated to pass through the first and second retaining rings and tightened, thereby completing the connection between the two sludge discharge pipes. When disassembly is required, simply reverse the operation, loosen the fixing bolt, remove the retaining rings, and the two sludge discharge pipes can be easily separated.
[0028] The beneficial effects of this invention are as follows:
[0029] (1) This invention addresses the environmental risks faced by traditional slurry equipment in the current pipe jacking construction process, such as the direct discharge of waste residue and wastewater, by setting up a slurry circulation mechanism and a connection mechanism. By integrating slurry pumping, pipeline switching and solid-liquid separation functions, it innovates the technology of slurry solid-liquid separation treatment and resource utilization, realizes the recycling of slurry, the separation of clean water is reused for construction washing, and the separated rock chips are used for roadbed filling or building material production after harmless treatment, reducing construction costs and achieving huge economic and environmental benefits.
[0030] (2) This invention is equipped with a grouting mechanism, and uses pressure sensors and turbidity meters to monitor the mud performance parameters in real time. It combines the appropriate working grout with the soil properties on site, and uses biodegradable polymer additives to replace traditional bentonite grout, reducing COD emissions by more than 60%. It also forms a closed loop circulation through a mud-water circulation mechanism to form a stable pressure to balance soil pressure and groundwater pressure. In addition, it combines mud-water pressure monitoring to adjust the cement grout injection volume in real time, ensuring that the sealing pressure is slightly higher than the static pressure of cement grout, which avoids grout leakage and prevents the sealing device from over-expanding and damaging the soil structure.
[0031] (3) The present invention is equipped with a jacking mechanism and a hole-stopping mechanism. The jacking mechanism can carry out pipe jacking construction on the prefabricated pipe, avoiding large-scale damage to the ground surface. It can provide an effective sealing effect during the pipe jacking construction process, especially at the hole where the pipe is in contact with the soil. By injecting cement grout into these pre-embedded grouting holes, the gap between the pipe and the surrounding soil can be filled, the stability of the hole can be enhanced, and groundwater or other liquids can be prevented from seeping in or out through the hole, thereby ensuring the safety and stability of the construction area. Attached Figure Description
[0032] Figure 1 This is a diagram of the internal structure of the working shaft for pipe jacking construction according to the present invention;
[0033] Figure 2 This is a cross-sectional structural diagram of the working shaft for pipe jacking construction according to the present invention;
[0034] Figure 3 This is a cross-sectional structural diagram of the opening water-stopping mechanism of the present invention;
[0035] Figure 4 This is a schematic diagram of the mud-water circulation mechanism of the present invention;
[0036] Figure 5 This is a schematic diagram of the grouting mechanism of the present invention;
[0037] Figure 6 This is a schematic diagram of the pipeline arrangement structure inside the prefabricated pipe of the present invention;
[0038] Figure 7 This is a schematic diagram of the cross-sectional arrangement of the first grouting pipe and grouting branch pipe of the present invention;
[0039] Figure 8 This is a schematic diagram of the cross-sectional arrangement of the second grouting pipe and the grouting branch pipe of the present invention;
[0040] Figure 9 This is a schematic diagram of the internal structure of the second grouting pipe of the present invention;
[0041] Figure 10 This is a schematic diagram of the connection mechanism structure of the present invention.
[0042] Attached reference numerals: 1. Pipe jacking working shaft; 2. Steel rear support; 3. Front wall; 4. Jacking mechanism; 401. Jack; 402. Hydraulic cylinder frame; 403. Jacking iron; 404. Guide rail; 405. Pipe jacking machine; 406. Precast pipe; 407. Ventilation duct; 408. Main cable; 409. LED light strip; 5. Water-stopping mechanism at the opening; 501. Single-layer fabric rubber sheet; 502. Grouting steel pipe; 503. Reserved opening; 504. External plug; 6. Slurry circulation mechanism; 601. Slurry purification device; 602. Water replenishment pump; 6 03. Mud inlet pump; 604. Mud inlet pipe; 605. Relay pump; 606. Mud discharge pump; 607. Mud discharge pipe; 7. Grouting mechanism; 701. Grout storage tank; 702. Mixing tank; 703. Grouting pump; 704. First grouting pipe; 705. Second grouting pipe; 706. Pressure gauge; 707. Grouting branch pipe; 708. Grouting hole; 709. High-pressure water pipe; 710. Sealing device pipe; 8. Connecting mechanism; 801. Pipe end; 802. Sealing ring; 803. First retaining ring; 804. Second retaining ring; 805. Fixing bolt. Detailed Implementation
[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.
[0044] like Figures 1-10As shown, this embodiment of an intelligent grouting system for pipe jacking construction includes a pipe jacking working shaft 1. A steel rear support 2 is fixedly installed on one side of the inner wall of the pipe jacking working shaft 1, and a front wall 3 is cast on the other side of the inner wall of the pipe jacking working shaft 1. The inside of the pipe jacking working shaft 1 is provided with a jacking mechanism 4 for pipe jacking construction. The jacking mechanism 4 includes a jack 401 fixed to one side of the steel rear support 2. A hydraulic cylinder frame 402 fixedly connected to the steel rear support 2 is fixed to the outside of the jack 401. A jacking iron 403 is fixed to one end of the piston rod of the jack 401. The inner bottom wall of the pipe jacking working shaft 1 is fixed with a guide rail 404. The top of the guide rail 404 is tightly fitted with a pipe jacking machine 405. One side of the pipe jacking machine 405 is tightly fitted with a precast pipe 406. A ventilation pipe 407 is provided on one side of the inside of the precast pipe 406, and a main cable 408 is provided on the other side of the inside of the precast pipe 406. An LED light strip 409 is suspended from one side of the inner wall of the precast pipe 406 by a hook. The rear wall of the pipe jacking working shaft 1 is made of C30 fine stone concrete cast in place, and then a steel rear support 2 is fixed on the front end plane of the rear wall, ensuring that it... Perpendicular to the jacking axis, the jack 401 is then fixed to one side of the steel rear support 2, and the hydraulic cylinder bracket 402 is used to fix it to the steel rear support 2 to ensure the stability of the jack 401. On the inner bottom wall of the pipe jacking working shaft 1, the guide rail 404, which is welded from structural steel and steel plates, is fixed with anchor bolts, and C15 fine stone concrete is poured between the bottom of the guide rail 404 and the foundation to make it firm. Then, the pipe jacking machine 405 is placed on the top of the guide rail 404, so that it fits tightly with the guide rail 404. Finally, the prefabricated pipe 406 is placed on the pipe jacking machine 405. On one side, it is also tightly fitted to the pipe jacking machine 405. The precast pipe 406 contains the main cable 408 and ventilation pipe 407, etc. The cable and pipe are arranged separately on both sides, and the main cable 408 leaves a one-meter slack at the relay station. The ventilation pipe 407 is equipped with a bellows-style corrugated pipe at the relay station. The LED light strip 409 is hung on the inner wall of the pipe with a special hook. During the pipe jacking construction, the jack 401 drives the jacking iron 403 to move. The jacking iron 403 pushes the precast pipe 406 and the pipe jacking machine 405 to move along the guide rail 404 to complete the pipe jacking construction operation.
[0045] like Figure 3As shown, a water-stopping mechanism 5 for providing a sealing effect is provided on one side of the front wall 3. The water-stopping mechanism 5 includes a single-layer fabric rubber sheet 501 fixed to one side of the front wall 3 by pre-embedded bolts. A grouting steel pipe 502 is pre-embedded and cast inside the front wall 3. Both ends of the grouting steel pipe 502 have pre-reserved holes 503. An external square plug 504 is threaded onto one end of the grouting steel pipe 502. The water-stopping mechanism 5 is installed on the single-layer fabric rubber sheet 501 through the pre-embedded steel ring of the front wall 3. The single-layer fabric rubber sheet 501 has good sealing effect. Its flexibility and sealing performance can adapt to deformation at the opening, effectively preventing water penetration. At the same time, the pre-embedded grouting steel pipe 502 allows for subsequent injection of cement grout into the opening to fill the gaps around the opening, forming a solid waterproof layer and enhancing the density and impermeability of the entire opening water-stopping structure. The reserved hole 503 ensures that the pre-embedded grouting steel pipe 502 will not affect the pipe jacking operation of the precast pipe 406 and the pipe jacking machine 405. The function of the external threaded plug 504 is to seal one end of the grouting steel pipe 502 when grouting is not required.
[0046] like Figures 4-6As shown, a mud-water circulation mechanism 6 for mud and water recycling is provided on one side of the external side of the pipe jacking construction working shaft 1. The mud-water circulation mechanism 6 includes a mud purification device 601 located on one side of the top of the pipe jacking construction working shaft 1. The inlet of the mud purification device 601 is fixedly connected to a water supply pump 602 through a pipe. The outlet of the mud purification device 601 is fixedly connected to a mud inlet pump 603 through a pipe. A mud inlet pipe 604 is fixed between the outlet of the mud inlet pump 603 and the mud-water tank of the pipe jacking machine 405. The pipe jacking machine 405 A relay pump 605 is fixed to the mud outlet of the mud slurry tank via a pipeline. A sludge discharge pump 606 is fixed to the mud outlet of the relay pump 605 via a pipeline. A sludge discharge pipe 607 is fixed between the mud outlet of the sludge discharge pump 606 and the mud inlet of the mud purification device 601. A water supply pump 602 is placed at the water source; preferably, it is a non-clogging sewage pump. Its main function is to supply water to the mud purification device 601, ensuring a stable water supply throughout the mud-water circulation system. The mud purification device 601 integrates a surface vibrating screen and... The cyclone separator efficiently separates rock debris from the mud and water, yielding cleaner water. The mud inlet pump 603, a slurry pump, delivers the purified water to the mud and water chamber of the pipe jacking machine 405 to maintain pressure balance during pipe jacking, ensuring normal pipe advancement and enabling mud and water recycling. This significantly improves water resource utilization, reduces water consumption during construction, and lowers costs. The mud discharge pump 606 is also a slurry pump. Both the mud inlet pump 603 and the mud discharge pump 606 are equipped with frequency converters to adjust speed, allowing for more flexible control of the mud and water circulation flow and pressure. This better maintains stable mud and water pressure at the tunnel face, ensuring smooth pipe jacking. A relay pump 605 is installed in the relay station. In long-distance pipe jacking, it acts as a relay pump, helping to maintain stable mud flow throughout the circulation system, further stabilizing mud and water pressure at the tunnel face, and preventing insufficient or excessively fluctuating mud and water pressure due to long-distance transport.
[0047] like Figure 5-9As shown, a grouting mechanism 7 is provided on the other side of the external side of the pipe jacking construction working shaft 1, which is combined with slurry pressure monitoring to adjust the slurry injection volume in real time. The grouting mechanism 7 includes a slurry storage tank 701 located on the other side of the top of the pipe jacking construction working shaft 1. Two mixing tanks 702 are provided on one side of the slurry storage tank 701. Two grouting pumps 703 are fixed at the slurry outlet of the slurry storage tank 701. A first grouting pipe 704 is fixed at the slurry outlet of one grouting pump 703, which extends through and into the precast pipe 406. A first grouting pipe 704 is fixed at the slurry outlet of the other grouting pump 703, which extends through and into the precast pipe 406. Pressure gauges 706 are fixed inside the second grouting pipe 705, the first grouting pipe 704, and the second grouting pipe 705. Grouting branch pipes 707 are fixed outside the first grouting pipe 704 and the second grouting pipe 705. Grouting holes 708 connected to the grouting branch pipes 707 are provided inside the precast pipe 406. High-pressure water pipes 709 are provided inside the first grouting pipe 704 and the second grouting pipe 705. A sealing pipe 710 is provided inside the high-pressure water pipe 709. First, the two mixing tanks 702 are started to fully mix the pre-mixed cement slurry. After mixing, the cement slurry is transported to the storage tank 701 for storage. When grouting is required, two grouting pumps 703 are turned on, causing the cement slurry in the storage tank 701 to be pumped out along the first grouting pipe 704 and the second grouting pipe 705 under the pressure of the grouting pumps 703. A grouting branch pipe 707 is installed every 7.5 meters on the first grouting pipe 704, and a grouting branch pipe 707 is installed every 2.5 meters on the second grouting pipe 705. A pressure gauge 706 is installed every three grouting branch pipes 707. During the grouting process, due to the pressure difference between the first grouting pipe 704 and the second grouting pipe 705... The pressure gauge 706 installed on the second grouting pipe 705 can monitor the grouting pressure inside the pipe in real time. Construction personnel can adjust the working parameters of the grouting pump 703 in a timely manner based on the data fed back by the pressure gauge 706, thereby accurately controlling the amount of cement grout injected. This ensures that the cement grout can be evenly injected into the soil around the precast pipe 406, guaranteeing the stability of the soil. The installation of the high-pressure water pipe 709 and the sealing pipe 710 helps to achieve effective sealing operations under appropriate pressure conditions, avoiding problems such as grout leakage, and ensuring the safety and smooth progress of the entire pipe jacking construction process.
[0048] like Figure 10As shown, the mud-water circulation mechanism 6 has a connecting mechanism 8 for quick pipe installation. The connecting mechanism 8 includes pipe ends 801 fixed to both ends of two sludge discharge pipes 607. A sealing ring 802 is installed between the two pipe ends 801. A first retaining ring 803 is snapped onto one side of the two pipe ends 801, and a second retaining ring 804 is snapped onto the other side of the two pipe ends 801. Two fixing bolts 805 are installed on the internal threads of the first retaining ring 803 and the second retaining ring 804. The sealing ring 802 is placed between the pipe ends 801 of the two sludge discharge pipes 607. Then, the first retaining ring 803 is snapped onto the designated position on the outside of the two pipe ends 801, and the second retaining ring 804 is snapped onto the corresponding outside position of the two pipe ends 801, ensuring that the two retaining rings are opposite and accurately positioned. Finally, the fixing bolts 805 are rotated to pass through the first retaining ring 803 and the second retaining ring 804 and tightened, thereby completing the connection between the two sludge discharge pipes 607. When disassembly is required, simply reverse the operation, loosen the fixing bolt 805, remove the retaining ring, and the two mud discharge pipes 607 can be easily separated.
[0049] The working principle of this embodiment is as follows: the jack 401 drives the jacking iron 403 to move, and the jacking iron 403 pushes the precast pipe 406 and the pipe jacking machine 405 to move along the guide rail 404 to carry out pipe jacking construction. At this time, it is the dynamic grouting stage. The mud pump 603 delivers clean water to the mud-water chamber of the pipe jacking machine 405 to maintain the pressure balance in the mud-water chamber during the pipe jacking construction process and ensure the normal advancement of the pipe. The mud and water in the mud-water chamber are discharged through the mud discharge pipe 607 and then discharged into the slurry through the relay pump 605 and the mud discharge pump 606. Inside the purification device 601, the surface vibrating screen and cyclone separator integrated into the mud purification device 601 separate the rock debris inside the mud and water to obtain relatively clean water, realizing the recycling of mud and water. Both the mud inlet pump 603 and the mud outlet pump 606 are equipped with frequency converters to adjust the speed, which can more flexibly control the flow rate and pressure of the mud and water circulation, thereby better maintaining the stability of the mud and water pressure at the tunneling face. The water replenishment pump 602 replenishes water to the mud purification device 601 to ensure a stable water supply in the entire mud and water circulation system.
[0050] Then, in the static grouting stage, the valves of the mud inlet pipe 604 and the mud outlet pipe 607 connected to the mud and water chamber of the pipe jacking machine 405 are closed, so that the mud inlet pipe 604 and the mud outlet pipe 607 are connected and switched to a partial closed-loop mode. Through the surface vibrating screen and cyclone separator integrated in the mud purification device 601, the rock debris inside the mud and water is separated and circulated for purification.
[0051] First, add 80% water to the mixing tank 702, then add sodium carbonate to dissolve while stirring. Next, add bentonite and stir for 15 to 20 minutes. Add the remaining water and continue stirring. Slowly add carboxymethyl cellulose by sprinkling powder and stir for about 25 minutes. After stirring, transport the thixotropic mud to the storage tank 701 for storage.
[0052] During pipe jacking construction, synchronous grouting is required. The cement slurry in the slurry storage tank 701 is pumped out by the grouting pump 703 under the pressure of the grouting pump 703, and then transported out along the first grouting pipe 704 and the second grouting pipe 705 respectively. This fills the gaps between the machine head and the pipe section, as well as the gaps caused by correction, and fills the gaps before the soil comes into contact with the pipe section, thus establishing a mud sleeve.
[0053] During the grouting process, the pressure gauges 706 installed on the first grouting pipe 704 and the second grouting pipe 705 can monitor the grouting pressure in the pipe in real time. Based on the data fed back by the pressure gauges 706, the construction personnel can adjust the working parameters of the grouting pump 703 in a timely manner, thereby accurately controlling the amount of cement grout injected, so that the cement grout can be evenly injected into the soil around the precast pipe 406, ensuring the stability of the soil.
[0054] After the jacking is completed, the existing grouting equipment is used to grout the outer wall of the precast pipe 406. The grout injected is cement grout. At one end of the top section, cement grout is pressed into the outer wall of the pipe through the grouting hole 708, and thixotropic mud is released from the other end until cement grout flows out. After the mud is replaced, the grouting branch pipe 707 is removed, the plug is tightened, and epoxy cement mortar is filled into the grouting hole 708. If there is no leakage, it is qualified. If there is leakage, it needs to be resealed.
[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.
Claims
1. An intelligent grouting system for pipe jacking construction, comprising a pipe jacking construction working shaft (1), characterized in that: A steel backrest (2) is fixedly installed on one side of the inner wall of the pipe jacking construction working well (1), and a front wall (3) is cast on the other side of the inner wall of the pipe jacking construction working well (1). The inside of the pipe jacking construction working well (1) is provided with a jacking mechanism (4) for pipe jacking construction, and a hole water-stopping mechanism (5) that provides a sealing effect is provided on one side of the front wall (3). The outer side of the pipe jacking construction working well (1) is provided with a mud and water circulation mechanism (6) to realize mud and water recycling, and the other side of the outer side of the pipe jacking construction working well (1) is provided with a grouting mechanism (7) that combines mud and water pressure monitoring to adjust the mud injection volume in real time. The mud and water circulation mechanism (6) is equipped with a connecting mechanism (8) for quick installation of pipes.
2. The intelligent grouting system for pipe jacking construction according to claim 1, characterized in that, The jacking mechanism (4) includes a jack (401) fixed to one side of the steel rear backrest (2), and a cylinder frame (402) fixed to the outside of the jack (401) and fixedly connected to the steel rear backrest (2). One end of the piston rod of the jack (401) is fixed with a top iron (403).
3. The intelligent grouting system for pipe jacking construction according to claim 1, characterized in that, The inner bottom wall of the jacking construction working well (1) is fixed with a guide rail (404), the top of the guide rail (404) is tightly fitted with a jacking machine (405), and a precast pipe (406) is tightly fitted to one side of the jacking machine (405).
4. The intelligent grouting system for pipe jacking construction according to claim 3, characterized in that, A ventilation pipe (407) is provided on one side of the interior of the precast pipe (406), and a main cable (408) is provided on the other side of the interior of the precast pipe (406). An LED light strip (409) is suspended on one side of the inner wall of the precast pipe (406) by a hook.
5. The intelligent grouting system for pipe jacking construction according to claim 1, characterized in that, The opening water-stopping mechanism (5) includes a single-layer curtain rubber plate (501) fixed to one side of the front wall (3) by pre-embedded bolts. A grouting steel pipe (502) is pre-embedded and cast inside the front wall (3). Both ends of the grouting steel pipe (502) are pre-reserved holes (503). One end of the grouting steel pipe (502) is threaded with an external square plug (504).
6. The intelligent grouting system for pipe jacking construction according to claim 3, characterized in that, The mud-water circulation mechanism (6) includes a mud purification device (601) located on one side of the top of the working well (1) of the pipe jacking construction. The water inlet of the mud purification device (601) is fixedly connected to a water replenishment pump (602) through a pipe. The mud outlet of the mud purification device (601) is fixedly connected to a mud inlet pump (603) through a pipe. The mud outlet of the mud inlet pump (603) is fixedly connected to the mud-water tank of the pipe jacking machine (405) through a mud inlet pipe (604).
7. The intelligent grouting system for pipe jacking construction according to claim 6, characterized in that, The mud outlet of the slurry tank of the pipe jacking machine (405) is fixed with a relay pump (605) through a pipe. The mud outlet of the relay pump (605) is fixed with a mud discharge pump (606) through a pipe. A mud discharge pipe (607) is fixed between the mud outlet of the mud discharge pump (606) and the mud inlet of the mud purification device (601).
8. The intelligent grouting system for pipe jacking construction according to claim 3, characterized in that, The grouting mechanism (7) includes a grout storage tank (701) located on the other side of the top of the jacking construction working well (1). Two mixing tanks (702) are provided on one side of the grout storage tank (701). Two grouting pumps (703) are fixed at the grout outlet of the grout storage tank (701). A first grouting pipe (704) is fixed at the grout outlet of one side of the grouting pump (703) with one end penetrating and extending into the interior of the precast pipe (406). A second grouting pipe (705) is fixed at the grout outlet of the other side of the grouting pump (703) with one end penetrating and extending into the interior of the precast pipe (406).
9. The intelligent grouting system for pipe jacking construction according to claim 8, characterized in that, Pressure gauges (706) are fixed inside the first grouting pipe (704) and the second grouting pipe (705). Grouting branch pipes (707) are fixed outside the first grouting pipe (704) and the second grouting pipe (705). A grouting hole (708) communicating with the grouting branch pipe (707) is provided inside the precast pipe (406). A high-pressure water pipe (709) is provided inside the first grouting pipe (704) and the second grouting pipe (705). A sealing pipe (710) is provided inside the high-pressure water pipe (709).
10. The intelligent grouting system for pipe jacking construction according to claim 7, characterized in that, The connecting mechanism (8) includes pipe ends (801) fixed to both ends of two sludge discharge pipes (607), a sealing ring (802) is sealed between the two pipe ends (801), a first retaining ring (803) is snapped onto one side of the two pipe ends (801), a second retaining ring (804) is snapped onto the other side of the two pipe ends (801), and two fixing bolts (805) are installed on the internal threads of the first retaining ring (803) and the second retaining ring (804).