A real-time automatic grouting control system for ultra-shallow cover soil pipe curtain construction

Abstract

The utility model discloses a kind of for ultra-shallow soil covering pipe curtain construction real-time automatic grout supplementing control system, including mixing bucket, grout supplementing device and grout supplementing pipe, mixing bucket is used to inject the grout supplementing medium of ready-made dispensing into grout supplementing device, grout supplementing device injects grout supplementing medium to pipe curtain steel pipe through grout supplementing pipe.The utility model utilizes pressure and press in the crack between pipe curtain steel pipe and hole wall with certain concentration grout supplementing medium, realize the real-time injection of high concentration slurry, and can form strength quickly, realize timely compensation stress loss generated due to pipe curtain construction, effectively control stratum subsidence, realized immediate control subsidence, and ensured the stability and reliability of subsidence control, and grout supplementing speed can be adjusted in time with the change of ground internal pressure, construction is safer and more controllable.

Description

Technical Field

[0001] This utility model relates to the field of anti-settlement technology in underground space construction, specifically to a real-time automatic grouting control system for ultra-shallow overburden pipe jacking construction. Background Technology

[0002] In the construction of small-diameter pipe jacking systems, ground settlement control is a critical issue for project safety. Existing settlement control methods mainly fall into two categories. One is to reduce disturbance through the adjustment of construction parameters, primarily including controlling the jacking speed, jacking force, guiding accuracy, and the range of soil disturbance. While this method can reduce settlement risk, it is often limited by geological conditions and construction equipment, making it difficult to fundamentally solve the settlement problem. The second method is compensatory grouting after construction. This is mainly done after the pipe jacking is completed, often through small guide pipes attached to the outside of the steel pipe, to fill the gap between the pipe and the soil, thereby achieving compensation. However, this method has a significant lag: grout is injected only after the pipe jacking has been jacked into place, by which time ground settlement has often already occurred, limiting the control effect. In addition, there have been attempts at grouting during drilling, but currently, ordinary cement grout or low-concentration grout is mostly used: because cement grout requires time to develop strength, it cannot provide effective support in the short term; and although the grout concentration is low and its fluidity is good, its filling and reinforcement effects are limited. Especially for pipe jacking construction under ultra-shallow overburden conditions, settlement control is extremely stringent, and relying solely on construction parameter control or post-construction grouting is insufficient to achieve real-time control of surface settlement. This invention provides a real-time automatic grouting control system for ultra-shallow overburden pipe jacking construction to solve the aforementioned problems. Utility Model Content

[0003] This invention provides a real-time automatic grouting control system for ultra-shallow overburden pipe jacking construction. By injecting a grouting medium of a certain concentration in real time, it compensates for stress loss caused by pipe jacking construction, thereby achieving real-time settlement control and effectively controlling settlement.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: A real-time automatic grouting control system for ultra-shallow soil cover pipe curtain construction includes a mixing tank, a grouting device, and a grouting pipe. The mixing tank and the grouting device are connected and used to inject a prepared grouting medium into the grouting device. The grouting device is connected to the grouting pipe and injects the grouting medium into the pipe curtain steel pipe through the grouting pipe. The grouting device includes a storage tank and a grouting mechanism. The storage tank is connected to a mixing tank, the grouting mechanism is connected to the storage tank, and the grouting pipe is connected to the storage tank.

[0005] Furthermore, the grouting mechanism is located at the top of the storage tank, and the grouting pipe is connected to the bottom of the storage tank; The grouting mechanism includes a mounting frame, a first power structure, and a squeezing plug. The mounting frame is disposed on the top of the storage tank. The first power structure is vertically disposed on the mounting frame and its output end is located in the storage tank. The squeezing plug is horizontally disposed on the output end of the first power structure and is located in the storage tank, matching the inner cavity of the storage tank.

[0006] Furthermore, the extrusion plug is provided with a feeding port. When opened, the feeding port is connected to the mixing tank for feeding. The feeding port is provided with a cover plate.

[0007] Furthermore, the storage tank is provided with a connecting structure, which includes a connecting seat and a connecting plate. The connecting seat is located at the top of the storage tank, and the connecting plate is located at the bottom of the mounting frame. When adding slurry, the connecting plate is located in the connecting seat and is fixedly connected to the connecting seat.

[0008] Furthermore, the mounting bracket is connected to the storage tank via a rotating shaft.

[0009] Furthermore, a sealing ring is provided on the outer periphery of the squeeze plug.

[0010] Furthermore, the grouting mechanism is located on the outside of the storage tank, and the grouting pipe is connected to the bottom of the storage tank through the grouting mechanism; The grouting mechanism includes a second power structure, a piston, and a grout outlet mechanism. The grout outlet mechanism includes a grout outlet pipe, a grout outlet valve, and a grout suction valve. The grout outlet pipe is provided with a grout outlet, a grout suction port, and a pressure chamber. The grout suction port is connected to a storage tank. The grout suction valve is located at the grout suction port. The grout outlet is connected to a grout replenishment pipe. The piston is connected to the pressure chamber. The second power structure is connected to the piston.

[0011] Furthermore, the grouting pipe includes a connecting pipe, a grout delivery pipe, and a grouting conduit. The connecting pipe is connected to a storage tank, and the grouting conduit is located outside the pipe curtain steel pipe and is connected to the connecting pipe through the grout delivery pipe.

[0012] Furthermore, control valves are provided on the connecting pipe and the slurry delivery pipe.

[0013] Furthermore, the mixing tank includes a tank body, a third power structure, and a mixing mechanism, wherein the mixing mechanism is disposed in the tank body and connected to the third power structure.

[0014] The beneficial effects of this utility model are as follows: By using pressure to inject a certain concentration of grouting medium into the gap between the pipe curtain steel pipe and the borehole wall, a high-concentration grout can be injected in real time and quickly form strength. This allows for timely compensation of stress loss caused by pipe curtain construction, effectively controlling ground settlement. It achieves real-time settlement control and ensures the stability and reliability of settlement control. Furthermore, the grouting speed can be adjusted in a timely manner according to changes in ground pressure, making construction safer and more controllable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model; Figure 2 This is a schematic diagram of the grouting process steps in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the grouting mechanism according to Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model; Figure 5 This is a schematic diagram of the grouting mechanism according to Embodiment 2 of this utility model; Figure 6 This is a schematic diagram of the slurry discharge structure according to Embodiment 2 of this utility model; Figure 7 This is a schematic diagram of the grouting mechanism in Embodiment 3 of this utility model.

[0016] Reference numerals: 1. Mixing tank; 2. Grouting device; 21. Storage tank; 22. Grouting mechanism; 221. Mounting frame; 222. First power structure; 223. Squeezing plug; 224. Second power structure; 225. Piston; 226. Grouting mechanism; 2261. Grouting pipe; 2262. Grouting valve; 2263. Suction valve; 23. Connecting structure; 3. Grouting pipe; 31. Connecting pipe; 32. Grouting conveying pipe; 33. Grouting conduit. Detailed Implementation

[0017] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0019] like Figure 1 As shown, a real-time automatic grouting control system for ultra-shallow overburden pipe curtain construction includes a mixing tank 1, a grouting device 2, and a grouting pipe 3. The mixing tank 1 and the grouting device 2 are connected. The mixing tank 1 is used to mix the grouting medium and inject the prepared grouting medium into the grouting device 2. The grouting device 2 is connected to the grouting pipe 3. The grouting device 2 injects the grouting medium into the gap between the pipe curtain steel pipes through the grouting pipe 3. During grouting, the grouting medium enters the grouting pipe 3 through the grouting device 2 and finally enters the gap between the steel pipe and the hole wall through the grouting hole set at the front end of the grouting pipe 3 to achieve filling.

[0020] This invention utilizes a mixing tank 1 to mix the grouting medium, then uses a grouting device 2 to provide the corresponding injection pressure for the mixed grouting medium, and injects the grouting medium into the space between the pipe curtain steel pipes through a grouting pipe 3. The real-time grouting is ensured by injection while drilling, effectively controlling deformation and settlement and playing a role in drag reduction and lubrication. Furthermore, as the pipe curtain construction progresses, the pressure of the injected grouting medium can be adjusted to meet continuous and stable injection, thereby ensuring effective support for the formation.

[0021] like Figure 1 , 4 As shown, the grouting device 2 includes a storage tank 21 and a grouting mechanism 22. The storage tank 21 is connected to the mixing tank 1, and the mixing tank 1 transports the mixed grouting medium to the storage tank 21. The grouting mechanism 22 is connected to the storage tank 21, and the grouting mechanism 22 outputs the grouting medium from the storage tank 21 to the grouting pipe 3, and then injects the grouting medium into the space between the pipe curtain steel pipes through the grouting pipe 3. The grouting pipe 3 is connected to the storage tank 21.

[0022] like Figure 3 As shown in Embodiment 1 of this utility model, the grouting mechanism 22 is located at the upper part of the storage tank 21, and the grouting pipe 3 is connected to the bottom of the storage tank 21. The grouting mechanism 22 presses downward from the top of the storage tank 21, forcing the grouting medium in the storage tank 21 from the grout outlet at the bottom of the storage tank 21 into the grouting pipe 3.

[0023] like Figure 3As shown, the grouting mechanism 22 includes a mounting frame 221, a first power structure 222, and a compression plug 223. The mounting frame 221 is disposed on the top of the storage tank 21 and is used to install the first power structure 222. The first power structure 222 is vertically disposed on the mounting frame 221, and the output end of the first power structure 222 extends into the storage tank 21. The compression plug 223 is horizontally disposed on the output end of the first power structure 222 and is horizontally disposed in the storage tank 21. Its shape matches the inner cavity of the storage tank 21, and the edge of the compression plug 223 is in close contact with the tank wall of the storage tank 21.

[0024] like Figure 2 As shown, when the grouting mechanism 22 of Embodiment 1 operates, the output end of the first power structure 222 set on the mounting frame 221 extends downward and drives the extrusion plug 223 to move downward. Since the extrusion plug 223 and the barrel wall of the storage barrel 21 form a seal, when the extrusion plug 223 moves downward, it will squeeze the grouting medium in the storage barrel 21 into the grouting pipe 3, thereby realizing the injection of the grouting medium.

[0025] like Figure 2 , 3 As shown, the extrusion plug 223 is further provided with a feeding port. When opened, the feeding port is connected to the mixing tank 1 for feeding materials. The feeding port is provided with a cover plate. When adding slurry, materials are added through the feeding port on the extrusion plug 223.

[0026] like Figure 2 , 3 As shown, the storage hopper 21 is further provided with a connecting structure 23. The function of the connecting structure 23 is to connect the mounting frame 221 to the storage hopper 21. The mounting frame 221 is connected to the storage hopper 21 in an openable and closable manner. During connection, the connecting structure 23 ensures the stability of the connection between the mounting frame 221 and the storage hopper 21. The connecting structure 23 includes a connecting seat and a connecting plate. The connecting seat is spaced apart at the top of the storage hopper 21, and the connecting plate is movably disposed at the bottom of the mounting frame 221. The connecting plate and the connecting seat are correspondingly arranged. During grouting, the connecting plate is located in the connecting seat and is fixedly connected to the connecting seat by a pin.

[0027] Preferably, the connecting seat is a connecting lug seat, welded to the storage bin 21, and the connecting plate is a connecting lug, connected to the mounting frame 221 by a pin. The connecting plate can rotate around the axis to avoid interference when the mounting frame 221 is opened and closed. In use, the mounting frame 221 is flipped downwards and placed on top of the storage bin 21, then the connecting plate is inserted into the connecting seat, and then the pin is used to lock the connecting plate to the connecting seat, thus ensuring a stable connection between the mounting frame 221 and the storage bin 21, thereby ensuring the stability of the first power structure 222. When it is necessary to open the mounting frame 221, the pin between the connecting plate and the connecting seat is removed, the connecting plate is removed from the connecting seat, and then the mounting frame 221 is flipped upwards. Furthermore, the mounting frame 221 is connected to the storage tank 21 via a rotating shaft. When the mounting frame 221 is opened and closed, it flips up and down with the rotating shaft as the fulcrum.

[0028] Furthermore, a sealing ring is provided on the outer periphery of the extrusion plug 223, so that a seal is formed between the extrusion plug 223 and the barrel wall of the storage barrel 21 to prevent the slurry replenishing medium from overflowing.

[0029] like Figure 2 As shown, the overall usage process of Embodiment 1 is as follows: First, the first power structure 222 is reset upwards, and the extrusion plug 223 is moved to the top of the storage tank 21. Then, the cover plate on the feeding port of the extrusion plug 223 is opened, and the slurry mixed in the mixing tank 1 is added into the storage tank 21 through the feeding port. After the slurry is full, the cover plate is closed. Then, under the action of the grouting mechanism 22, the grouting operation is performed. After the slurry is injected, the first power structure 222 is reset and the feeding is continued until the construction is completed. After the construction is completely finished, the first power structure 222 is reset, and then the connecting structure 23 between the storage tank 21 and the mounting frame 221 is opened. The mounting frame 221 is flipped upwards and opened to clean the inside of the storage tank 21.

[0030] like Figure 4 As shown in Embodiment 2 of this utility model, the grouting mechanism 22 is located on the outside of the storage tank 21, and the grouting pipe 3 is connected to the bottom of the storage tank 21 through the grouting mechanism 22. The grouting mechanism 22 outputs the grouting medium through pressure changes.

[0031] like Figure 4 , 5As shown in Figure 6, the grouting mechanism 22 includes a second power structure 224, a piston 225, and a grout outlet mechanism 226. The grout outlet mechanism 226 includes a grout outlet pipe 2261, a grout outlet valve 2262, and a grout suction valve 2263. The grout outlet pipe 2261 is provided with a grout outlet, a grout suction port, and a pressure chamber. The grout suction port is connected to the storage tank 21. The grout suction valve 2263 is located at the grout suction port. The grout outlet is connected to the grout replenishment pipe 3. The grout outlet valve 2262 is located at the grout outlet. Both the grout suction valve 2263 and the grout outlet valve 2262 are one-way valves. The grout suction valve 2263 allows the grout to enter the grout outlet pipe 2261 from the storage tank 21 through the grout suction port. The grout outlet valve 2262 allows the grout to be discharged from the grout outlet of the grout outlet pipe 2261. The piston 225 is connected to the pressure chamber, and the second power structure 224 is connected to the piston 225.

[0032] Piston 225 and slurry discharge mechanism 226 form a unidirectional slurry delivery channel, and the action of piston 225 realizes the continuous circulation of slurry suction and discharge, thereby realizing the function of continuous pumping of high-concentration slurry while drilling. The specific structure is as follows: the slurry discharge pipe 2261 is a three-way structure. The slurry suction port is connected to the storage tank 21 for slurry suction from the storage tank 21, and the slurry suction valve 2263 controls the unidirectional entry of slurry. The slurry discharge port is connected to the slurry supply pipe 3 for inputting the suction slurry into the slurry supply pipe 3, and the slurry discharge valve 2262 controls the unidirectional output of slurry. The piston 225, which is connected to the pressure chamber, provides the pressure for slurry suction and discharge. The specific actions are as follows: When the piston 225 moves upward under the drive of the second power structure 224, a negative pressure is formed in the pressure chamber of the slurry outlet pipe 2261. At this time, the slurry suction valve 2263 located at the slurry suction port opens, while the slurry outlet valve 2262 located at the slurry outlet remains closed. Under the action of negative pressure, the slurry in the storage tank 21 is sucked into the pressure chamber, completing the slurry suction action. When the piston 225 moves downward from the top under the drive of the second power structure 224, the pressure in the pressure chamber increases. At this time, the slurry suction valve 2263 located at the slurry suction port closes to prevent the slurry from flowing back into the storage tank 21. At the same time, the slurry outlet valve 2262 located at the slurry outlet opens. Under the action of positive pressure, the slurry in the pressure chamber is squeezed from the slurry outlet into the slurry replenishment pipe 3, and injected into the gap between the pipe curtain steel pipe and the hole wall through the overflow hole on the slurry replenishment pipe 3. With the reciprocating action of the piston 225, the cyclic slurry suction-grouting is realized.

[0033] like Figure 7As shown in Embodiment 3 of this utility model, the grouting mechanism 22 is located on the outside of the mixing tank 1, at the bottom of the mixing tank 1. The grouting mechanism 22 consists of a third power structure and a screw pump. The screw pump is connected to the mixing tank 1 through a discharge pipe located at the bottom of the mixing tank 1. A valve is provided on the discharge pipe. The third power structure is connected to the screw pump. The grouting pipe 3 is connected to the grout outlet of the screw pump. In use, the mixing tank 1 mixes and stirs the slurry. Then, the valve on the discharge pipe is opened, and the mixed slurry flows into the screw pump. The screw pump then transports the slurry to the grouting pipe 3, and finally injects it into the gap between the pipe curtain steel pipe and the hole wall through the overflow hole on the grouting pipe 3.

[0034] Furthermore, the grouting pipe 3 includes a connecting pipe 31, a grout delivery pipe 32, and a grouting conduit 33. The connecting pipe 31 is connected to the storage tank 21. The grouting conduit 33 is located outside the pipe curtain steel pipe. The grouting conduit 33 is connected to the connecting pipe 31 through the grout delivery pipe 32. The grouting conduit 33 is provided with an overflow hole.

[0035] Furthermore, control valves are provided on the connecting pipe 31 and the slurry delivery pipe 32.

[0036] Furthermore, the first power structure 222 and the second power structure 224 are hydraulic cylinders.

[0037] Furthermore, the mixing tank 1 includes a tank body, a third power structure, and a mixing mechanism. The mixing mechanism is located in the tank body and connected to the third power structure. The mixing mechanism consists of a mixing shaft and mixing blades.

[0038] Furthermore, the grouting medium is bentonite slurry pre-mixed according to factors such as strata, or a mixture thereof with other liquid media such as cement, water glass, chemical polymers, etc.

[0039] Furthermore, a control system is installed to monitor grouting pressure, borehole formation, and grouting frequency in real time, ensuring that grouting is synchronized with drilling. This achieves constant grouting pressure or automatic balanced grouting operation that follows drilling. During construction, grouting parameters are determined based on construction speed, ground pressure monitoring data, and the concentration and characteristics of the grout medium. The grouting speed is also adjusted in real time by modifying the parameters of the power structure, ensuring real-time controllability.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A real-time automatic grouting control system for ultra-shallow overburden pipe jacking construction, characterized in that: It includes a mixing tank (1), a grouting device (2) and a grouting pipe (3). The mixing tank (1) and the grouting device (2) are connected and used to inject the prepared grouting medium into the grouting device (2). The grouting device (2) is connected to the grouting pipe (3) and the grouting medium is injected into the pipe curtain steel pipe through the grouting pipe (3). The grouting device (2) includes a storage tank (21) and a grouting mechanism (22). The storage tank (21) is connected to the mixing tank (1), the grouting mechanism (22) is connected to the storage tank (21), and the grouting pipe (3) is connected to the storage tank (21).

2. The real-time automatic grouting control system for ultra-shallow overburden pipe jacking construction according to claim 1, characterized in that: The grouting mechanism (22) is located on the upper part of the storage tank (21), and the grouting pipe (3) is connected to the bottom of the storage tank (21); The grouting mechanism (22) includes a mounting frame (221), a first power structure (222), and a squeezing plug (223). The mounting frame (221) is set on the top of the storage tank (21). The first power structure (222) is vertically set on the mounting frame (221). The output end of the first power structure (222) is located in the storage tank (21). The squeezing plug (223) is horizontally set on the output end of the first power structure (222). The squeezing plug (223) is located in the storage tank (21) and matches the inner cavity of the storage tank (21).

3. The real-time automatic grouting control system for ultra-shallow overburden pipe jacking construction according to claim 2, characterized in that: The extrusion plug (223) is provided with a feeding port. When opened, the feeding port is connected to the mixing tank (1). The feeding port is provided with a cover plate.

4. A real-time automatic grouting control system for ultra-shallow overburden pipe jacking construction according to claim 2, characterized in that: The storage tank (21) is provided with a connecting structure (23), which includes a connecting seat and a connecting plate. The connecting seat is located on the top of the storage tank (21), and the connecting plate is located at the bottom of the mounting frame (221). When grouting, the connecting plate is located in the connecting seat and is fixedly connected to the connecting seat.

5. A real-time automatic grouting control system for ultra-shallow overburden pipe jacking construction according to claim 2, characterized in that: The mounting bracket (221) is connected to the storage tank (21) via a rotating shaft.

6. A real-time automatic grouting control system for ultra-shallow overburden pipe jacking construction according to claim 2, characterized in that: The outer periphery of the compression plug (223) is provided with a sealing ring.

7. A real-time automatic grouting control system for ultra-shallow overburden pipe jacking construction according to claim 1, characterized in that: The grouting mechanism (22) is located on the outside of the storage tank (21), and the grouting pipe (3) is connected to the bottom of the storage tank (21) through the grouting mechanism (22); The grouting mechanism (22) includes a second power structure (224), a piston (225), and a grouting mechanism (226). The grouting mechanism (226) includes a grouting pipe (2261), a grouting valve (2262), and a grouting suction valve (2263). The grouting pipe (2261) is provided with a grouting outlet, a grouting suction outlet, and a pressure chamber. The grouting suction outlet is connected to the storage tank (21). The grouting suction valve (2263) is located at the grouting suction outlet. The grouting outlet is connected to the grouting replenishment pipe (3). The grouting valve (2262) is located at the grouting outlet. The piston (225) is connected to the pressure chamber. The second power structure (224) is connected to the piston (225).

8. A real-time automatic grouting control system for ultra-shallow overburden pipe jacking construction according to claim 7, characterized in that: The grouting pipe (3) includes a connecting pipe (31), a grout delivery pipe (32), and a grouting conduit (33). The connecting pipe (31) is connected to the storage tank (21). The grouting conduit (33) is located outside the pipe curtain steel pipe and is connected to the connecting pipe (31) through the grout delivery pipe (32).

9. A real-time automatic grouting control system for ultra-shallow overburden pipe jacking construction according to claim 8, characterized in that: Control valves are provided on the connecting pipe (31) and the slurry delivery pipe (32).

10. A real-time automatic grouting control system for ultra-shallow overburden pipe jacking construction according to claim 1, characterized in that: The mixing tank (1) includes a tank body, a third power structure and a mixing mechanism. The mixing mechanism is located in the tank body and is connected to the third power structure.

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