Grouting device and grouting construction method

Abstract

The present application provides a kind of grouting device and grouting construction method, for the demand of large-area grouting engineering and the deficiency of existing grouting technology, the present application is directly delivered to grouting point by grouting main pipe and grouting branch pipe, according to the real-time acquisition of grouting quantity data of each point flow sensor, adjust grouting pressure by grouting pressure regulator, realize on-demand grouting to large-area component.The present application utilizes grouting main pipe to connect multiple grouting branch pipes, which can simultaneously grout multiple grouting stations, improving construction efficiency;The flow sensor arranged in the grouting branch pipe can timely understand the grouting quantity of each place;According to the data of flow sensor, combined with pressure regulator, orderly grouting and on-demand grouting are realized by adjusting grouting pressure, which ensures the grouting quality at the station.

Description

Technical Field

[0001] This invention relates to a grouting device and a grouting construction method. Background Technology

[0002] Current grouting technologies mainly focus on point grouting and strip grouting.

[0003] The main characteristic of point grouting is that one grouting pipe corresponds to one fixed grout outlet. The grout is injected into the soil adjacent to the grout outlet under pressure. This grouting method has a small range of influence, but the local stress within the range is large, such as the post-grouting technology of bored piles.

[0004] The main characteristic of strip grouting is that one grouting pipe corresponds to one moving grout outlet. Under pressure, the grout moves with the grout outlet to grout the adjacent soil. The affected area is distributed in a strip shape, such as the back wall grouting technology in the shield tunnel construction process.

[0005] For large-area grouting in specific projects, such as grouting the side of precast underground continuous walls where there are high requirements for controlling surface settlement, neither point grouting technology nor strip grouting technology can achieve the desired effect. Summary of the Invention

[0006] The purpose of this invention is to provide a grouting device and a grouting construction method.

[0007] To solve the above problems, the present invention provides a grouting device, comprising:

[0008] The grouting main pipe is connected to the grouting equipment via a valve;

[0009] Multiple grouting branch pipes are connected to the main grouting pipe, and each grouting branch pipe is provided with multiple grout outlet holes.

[0010] Multiple flow sensors are arranged between two adjacent grout outlets of the grouting branch pipe;

[0011] Multiple grouting pressure regulators are provided, with each grout outlet connected to a grouting pressure regulator. The outlet end of each grouting pressure regulator is provided with a rotary grouting hole, and the outlet end of the rotary grouting hole is located at various grouting positions in the soil.

[0012] Furthermore, in the above-mentioned grouting device, the grouting pressure regulator includes:

[0013] A cylindrical outer shell, wherein a hollow cavity is formed inside the cylindrical outer shell, and the rotating spray hole is provided on the top wall of the cylindrical outer shell;

[0014] A grouting pipe integrally connected to the cylindrical outer shell, wherein the outlet end of the grouting pipe extends into the cavity, the inlet end of the grouting pipe extends out of the cavity, and the inlet end of the grouting pipe is provided with the external thread;

[0015] A movable grout-blocking valve is installed inside the cavity, and the movable grout-blocking valve is used to block the outlet end of the grouting pipe;

[0016] A spring is disposed within the cavity, wherein the upper end of the spring abuts against the top wall of the cylindrical outer shell, and the lower end of the spring abuts against the movable slurry blocking valve.

[0017] Furthermore, in the above-mentioned grouting device, the movable grout-blocking valve includes an upper ring plate, a lower ring plate, a grout-blocking valve, and several structural rods disposed within the cavity. The grout-blocking valve is disposed at the outlet end of the grouting pipe. The upper ring plate, the lower ring plate, and the movable grout-blocking valve are connected by several structural rods. The lower ring plate is sleeved on the outer side wall of the grouting pipe, and a first ball bearing is disposed between the inner side wall of the lower ring plate and the outer side wall of the grouting pipe, allowing the lower ring plate to slide up and down along the outer side wall of the grouting pipe. The upper ring plate is sleeved on the inner side wall of a cylindrical shell at the upper part of the outlet end of the grouting pipe, and a second ball bearing is disposed between the outer side wall of the upper ring plate and the inner side wall of the cylindrical shell, allowing the upper ring plate to slide up and down along the inner side wall of the cylindrical shell.

[0018] Furthermore, in the above-mentioned grouting device, the upper end of the spring abuts against the top wall of the cylindrical outer shell, and the lower end of the spring abuts against the top of the upper ring plate.

[0019] Furthermore, in the above-mentioned grouting device, the outlet end of the grouting pipe and the grout-blocking valve are located at the lower part of the lower end of the spring.

[0020] Furthermore, in the above-mentioned grouting device, the flow sensor is a clamp-type flow sensor.

[0021] According to another aspect of the present invention, a grouting construction method is also provided, employing the grouting device described in any of the preceding claims, the grouting construction method comprising:

[0022] Arrange the main grouting pipe and branch pipe according to the grouting requirements, and determine the number and location of the grout outlet holes of the branch pipe;

[0023] Flow sensors are arranged between the grout outlets along the grouting branch pipe, and the power and data lines of the flow sensors are fixed to the grouting main pipe and the grouting branch pipe.

[0024] Based on the pressure and injection volume requirements at each grouting location in the soil, the stiffness coefficient of the corresponding spring is determined. After selecting the spring in the grouting pressure regulator based on the stiffness coefficient, the grouting pressure regulator is installed on the corresponding grout outlet.

[0025] Each grouting pressure regulator is pre-embedded in the grouting position of the precast diaphragm wall in the soil. The grouting branch pipes between the diaphragm wall segments are connected through the grouting main pipe. After the diaphragm wall is constructed, the grouting equipment is connected to the grouting main pipe.

[0026] Pre-inject clean water into the grouting pipe to clean the hole. After cleaning the hole, maintain the pressure inside the grouting pipe during the cleaning process and close the valve on the main grouting pipe.

[0027] The grouting pressure is determined by first increasing the spring stiffness coefficient, and then grouting is carried out in an orderly and on-demand manner.

[0028] After grouting is completed, shut down the grouting equipment, or inject clean water into the grouting pipe to clean the hole as needed according to the formal grouting process. After cleaning the hole, maintain the pressure in the grouting pipe during the cleaning process and close the valve on the main grouting pipe.

[0029] Furthermore, in the above method, the grouting pressure is determined by first decreasing the spring stiffness coefficient and then increasing it, enabling orderly and on-demand grouting, including:

[0030] Under the action of grouting pressure, the grout flows from the grouting main pipe into the grouting branch pipe, and the actual grouting volume at each grouting position is measured by the flow sensor.

[0031] By comparing the grouting demand and the actual grouting volume at the grouting location, the grouting pressure of the main grouting pipe is adjusted, and the grouting valves of each grouting pressure regulator are controlled to open or close the grouting process.

[0032] Furthermore, in the above method, controlling the grouting valve of each grouting pressure regulator to open or close the grouting process includes:

[0033] When the grouting pressure is greater than the sum of the spring force and the external grout force, the grout-blocking valve opens and grouting begins in the grouting pipe; when the grouting pressure is less than the sum of the spring force and the external grout force, the grout-blocking valve closes and grouting is interrupted in the grouting pipe.

[0034] Furthermore, in the above method, the spring stiffness coefficient is determined based on the pressure and injection volume requirements at the grouting location in the soil, and the spring in the grouting pressure regulator is selected based on the stiffness coefficient, including:

[0035] When two grouting pressure regulators are located, one close to the main grouting pipe and the other far from it; if the grouting demand at the far-distance grouting pressure regulator is large, then, while ensuring the grouting pressure, the far-distance grouting pressure regulator should select a spring with a smaller stiffness coefficient, and the near-distance grouting pressure regulator should select a spring with a larger stiffness coefficient.

[0036] By comparing the required grouting volume at the grouting location with the actual grouting volume, the grouting pressure of the main grouting pipe is adjusted, and the grouting valves of each grouting pressure regulator are controlled to open or close the grouting process, including:

[0037] When the pressure in the grouting main pipe is controlled to be greater than the sum of the force of the smaller stiffness coefficient spring and the force of the external grout, but less than the sum of the force of the larger stiffness coefficient spring and the force of the external grout, the grouting pressure regulator of the smaller stiffness coefficient spring at a distance opens.

[0038] During the grouting process, the grouting pressure is increased based on the grouting volume measured by the flow sensor between the grouting pressure controllers. When the grouting pressure is greater than the sum of the force of the large stiffness coefficient spring and the force of the external grout, the grout blocking valve of the grouting pressure controller at the nearest point will open, and the grouting pressure controllers at both locations will grout together.

[0039] Compared with the prior art, the present invention allows for the arbitrary arrangement of grouting main pipes and grouting branch pipes in different shapes according to engineering requirements. A valve is installed at the connection point between the grouting main pipe and the grouting equipment. The grouting main pipe can be connected to multiple grouting branch pipes. Multiple grout outlet holes are provided on each grout outlet hole. Clamp-type flow sensors are arranged between each grout outlet hole along the branch pipe. The sensors measure the grouting volume. The rotating spray holes of the grouting pressure regulator are distributed at the grouting positions in the soil.

[0040] This invention addresses the needs of large-area grouting projects and the shortcomings of existing grouting technologies. It delivers grout directly to the grouting points through a main grouting pipe and branch pipes. Based on the grouting volume data collected in real time by flow sensors at each point, the grouting pressure is adjusted by a grouting pressure regulator, enabling on-demand grouting of large-area components.

[0041] This invention utilizes a main grouting pipe connected to multiple grouting branch pipes to simultaneously grout multiple grouting stations, improving construction efficiency. Flow sensors arranged in the grouting branch pipes can monitor the grouting volume at each location in real time. Based on the data from the flow sensors, combined with a pressure regulator, the grouting pressure is adjusted to achieve orderly and on-demand grouting, ensuring the grouting quality at each station. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the grouting plan according to an embodiment of the present invention;

[0043] Figure 2This is a schematic diagram of a grouting pressure regulator according to an embodiment of the present invention;

[0044] Figure 3 This is a schematic diagram of the working principle of a grouting pressure regulator according to an embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of the structure of a pressure regulator according to an embodiment of the present invention;

[0046] Figure 5 This is a schematic diagram of the structure of a movable sealing valve according to an embodiment of the present invention. Detailed Implementation

[0047] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] like Figures 1 to 5 As shown, the present invention provides a grouting device, comprising:

[0049] Grouting main pipe 1, which is connected to the grouting equipment via a valve;

[0050] Multiple grouting branch pipes 2, each grouting branch pipe is connected to the main grouting pipe, and each grouting branch pipe is provided with multiple grout outlet holes 4;

[0051] Multiple flow sensors 3, each flow sensor is arranged between two adjacent grout outlets of the grouting branch pipe;

[0052] Multiple grouting pressure regulators 5 are provided, and each grout outlet 4 is connected to a grouting pressure regulator 5. The outlet end of the grouting pressure regulator 5 is provided with a rotary grouting hole 6, and the outlet end of the rotary grouting hole 6 is provided at each grouting position in the soil.

[0053] In this invention, the grouting main pipe and grouting branch pipe can be arbitrarily set according to different shapes according to engineering requirements. A valve is set at the connection position of the grouting main pipe with the grouting equipment. The grouting main pipe can be connected to multiple grouting branch pipes. Multiple grout outlet holes are set on each grout outlet hole. Clamp-type flow sensors are arranged between each grout outlet hole along the branch pipe. The sensors measure the grouting volume. The rotating spray holes of the grouting pressure regulator are distributed at the grouting position in the soil.

[0054] This invention addresses the needs of large-area grouting projects and the shortcomings of existing grouting technologies. It delivers grout directly to the grouting points through a main grouting pipe and branch pipes. Based on the grouting volume data collected in real time by flow sensors at each point, the grouting pressure is adjusted by a grouting pressure regulator, enabling on-demand grouting of large-area components.

[0055] This invention utilizes a main grouting pipe connected to multiple grouting branch pipes to simultaneously grout multiple grouting stations, improving construction efficiency. Flow sensors arranged in the grouting branch pipes can monitor the grouting volume at each location in real time. Based on the data from the flow sensors, combined with a pressure regulator, the grouting pressure is adjusted to achieve orderly and on-demand grouting, ensuring the grouting quality at each station.

[0056] In one embodiment of the grouting device of the present invention, the outlet end of the grout outlet 4 is provided with an internal thread, and the inlet end of the grouting pressure regulator 5 is provided with an external thread 7 that mates with the internal thread.

[0057] like Figures 2 to 4 As shown, in one embodiment of the grouting device of the present invention, the grouting pressure regulator 5 includes:

[0058] A cylindrical outer shell, with a hollow cavity 9 formed inside the cylindrical outer shell, and the rotating spray hole 6 is provided on the top wall of the cylindrical outer shell 8;

[0059] The grouting pipe 10 is integrally connected to the cylindrical outer shell. The outlet end of the grouting pipe 10 extends into the cavity 9, and the inlet end of the grouting pipe 10 extends out of the cavity 9. The inlet end of the grouting pipe 10 is provided with the external thread 7.

[0060] A movable grout-blocking valve is installed inside the cavity 9, and the movable grout-blocking valve is used to block the outlet end of the grouting pipe 10;

[0061] A spring 11 is disposed in the cavity, wherein the upper end of the spring 11 abuts against the top wall of the cylindrical outer shell 8, and the lower end of the spring 11 abuts against the movable slurry blocking valve.

[0062] Here, the grouting pressure regulator is cylindrical and consists of a cylindrical shell, a movable grout-blocking valve, a spring, etc.

[0063] In one embodiment of the grouting device of the present invention, the movable grout-blocking valve includes an upper annular plate 12, a lower annular plate 13, a grout-blocking valve 14, and a plurality of structural rods 15 disposed within the cavity 9. The grout-blocking valve 14 is disposed at the outlet end of the grouting pipe 10. The upper annular plate 12, the lower annular plate 13, and the movable grout-blocking valve 14 are connected by a plurality of structural rods 15. The lower annular plate 13 is sleeved on the outer side wall of the grouting pipe 10. Between the inner wall of the lower ring plate 13 and the outer wall of the grouting pipe 10, a first ball bearing 17 is provided for the lower ring plate 13 to slide up and down along the outer wall of the grouting pipe 10; the upper ring plate 12 is sleeved inside the inner wall of the cylindrical outer shell 8 at the upper part of the outlet end of the grouting pipe 10, and between the outer wall of the upper ring plate 12 and the inner wall of the cylindrical outer shell 8, a second ball bearing 16 is provided for the upper ring plate 12 to slide up and down along the inner wall of the cylindrical outer shell 8.

[0064] Here, the movable grout-blocking valve consists of a grout-blocking valve, several structural rods, an upper ring plate, and a lower ring plate. To facilitate the movement of the movable grout-blocking valve, a ball bearing is provided between the inner wall of the lower ring plate and the outer wall of the grouting pipe, allowing the lower ring plate to slide up and down along the outer wall of the grouting pipe. Similarly, a ball bearing is provided between the outer wall of the upper ring plate and the inner wall of the cylindrical outer shell, allowing the upper ring plate to slide up and down along the inner wall of the cylindrical outer shell. A rotating grout injection hole is provided at the top of the pressure regulator.

[0065] In one embodiment of the grouting device of the present invention, the upper end of the spring abuts against the top wall of the cylindrical outer shell, and the lower end of the spring abuts against the top of the upper ring plate.

[0066] In one embodiment of the grouting device of the present invention, the outlet end of the grouting pipe and the grout-blocking valve are located at the lower part of the lower end of the spring.

[0067] In one embodiment of the grouting device of the present invention, the flow sensor is a clamp-type flow sensor.

[0068] According to another aspect of the present invention, a grouting construction method is also provided, employing the grouting device described in any of the above embodiments, the method comprising:

[0069] Step S1: Arrange the main grouting pipe and branch pipe according to the grouting requirements, and determine the number and location of the grout outlet holes of the branch pipe;

[0070] Step S2: Arrange flow sensors between the grout outlet holes along the grouting branch pipe, and fix the power and data cables of the flow sensors to the grouting main pipe and the grouting branch pipe.

[0071] Step S3: Determine the stiffness coefficient of the corresponding spring according to the pressure and injection volume requirements of each grouting location in the soil. After selecting the spring in the grouting pressure regulator according to the stiffness coefficient, install the grouting pressure regulator on the corresponding grout outlet.

[0072] Step S4: Pre-embed each grouting pressure regulator in the grouting position of the precast diaphragm wall in the soil. The grouting branch pipes between the diaphragm wall segments are connected through the grouting main pipe. After the diaphragm wall is constructed, connect the grouting equipment to the grouting main pipe.

[0073] Step S5: Pre-inject clean water into the grouting pipe to clean the hole. After cleaning the hole, maintain the pressure inside the grouting pipe during the cleaning process and close the valve on the main grouting pipe.

[0074] Step S6: Determine the grouting pressure by first increasing the spring stiffness coefficient, and then perform orderly and on-demand grouting.

[0075] Step S7: After grouting is completed, shut down the grouting equipment, or inject clean water into the grouting pipe to clean the hole as needed according to the formal grouting process. After cleaning the hole, maintain the pressure in the grouting pipe during the cleaning process and close the valve on the main grouting pipe.

[0076] Further, in step S6, the grouting pressure is determined by first decreasing the spring stiffness coefficient and then increasing it, and orderly and on-demand grouting is performed, including:

[0077] In step S61, under the action of grouting pressure, grout flows from the grouting main pipe into the grouting branch pipe, and the actual grouting volume at each grouting position is measured by the flow sensor.

[0078] Step S62: By comparing the grouting demand at the grouting location with the actual grouting volume, the grouting pressure of the grouting main pipe is adjusted, and the grouting valves of each grouting pressure regulator are controlled to open or close the grouting, ultimately achieving orderly and on-demand grouting at each grouting location.

[0079] Further, step S62, controlling the grouting valve of each grouting pressure regulator to open or close the grouting, includes:

[0080] When the grouting pressure is greater than the sum of the spring force and the external grout force, the grout-blocking valve opens and grouting begins in the grouting pipe; when the grouting pressure is less than the sum of the spring force and the external grout force, the grout-blocking valve closes and grouting is interrupted in the grouting pipe.

[0081] Further, in step S3, based on the pressure and injection volume requirements at the grouting location in the soil, the spring stiffness coefficient is determined, and the spring in the grouting pressure regulator is selected based on the stiffness coefficient, including:

[0082] When two grouting pressure regulators are located, one close to the main grouting pipe and the other far from it, if the grouting demand at the far-distance grouting pressure regulator is large, then, while ensuring the grouting pressure, the far-distance grouting pressure regulator should select a spring with a smaller stiffness coefficient, and the near-distance grouting pressure regulator should select a spring with a larger stiffness coefficient.

[0083] Further, in step S62, by comparing the grouting demand at the grouting location with the actual grouting volume, the grouting pressure of the main grouting pipe is adjusted, and the grouting valves of each grouting pressure regulator are controlled to open or close the grouting process, including:

[0084] When the pressure in the grouting main pipe is controlled to be greater than the sum of the force of the smaller stiffness coefficient spring and the force of the external grout, but less than the sum of the force of the larger stiffness coefficient spring and the force of the external grout, the grouting pressure regulator of the smaller stiffness coefficient spring at a distance opens.

[0085] During the grouting process, the grouting pressure is increased based on the grouting volume measured by the flow sensor between the grouting pressure controllers. When the grouting pressure is greater than the sum of the force of the large stiffness coefficient spring and the force of the external grout, the grout blocking valve of the grouting pressure controller at the nearest point will open, and the grouting pressure controllers at both locations will grout together.

[0086] Specifically, the movable grouting valve mainly bears the grouting pressure in the grouting pipe, the spring force, and the external grout force. The magnitude of the spring force is determined by its stiffness coefficient, the grouting pressure in the grouting pipe can be controlled by the grouting equipment, and the external grout force gradually increases with the amount of grout injected into the soil.

[0087] Taking two grouting pressure regulators as an example, we can further illustrate their regulating function:

[0088] Two grouting pressure regulators are used, one closer to the main grouting pipe and the other farther away. Due to pressure loss as the grout flows through the pipe, the pressure of the grout entering the farther regulator is lower than the pressure entering the closer regulator. If the grouting demand at the farther regulator is high, then, while ensuring the grouting pressure, a spring with a smaller stiffness coefficient should be selected for the farther regulator, and a spring with a larger stiffness coefficient should be selected for the closer regulator. When the pressure in the grouting main pipe is controlled to be greater than the sum of the force of the smaller stiffness coefficient spring and the force of the external grout, but less than the sum of the force of the larger stiffness coefficient spring and the force of the external grout, the grout-blocking valve of the grouting pressure regulator with the smaller stiffness coefficient spring at a distance opens, thus prioritizing grouting at the grouting location with the highest demand at a distance. During grouting, the grouting pressure is increased in a timely manner based on the grouting volume measured by the flow sensors between the grouting pressure regulators. When the grouting pressure exceeds the sum of the force of the larger stiffness coefficient spring and the force of the external grout, the grout-blocking valve of the grouting pressure regulator at a closer distance opens, and both grouting pressure regulators simultaneously begin grouting. Other operating conditions between the two regulators can also be met according to the above principle.

[0089] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0090] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0091] Obviously, those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Therefore, if these modifications and variations fall within the scope of the claims of the invention and their equivalents, the invention is also intended to include these modifications and variations.

Claims

1. A grouting construction method, characterized in that, A grouting device is employed, the grouting device comprising: The grouting main pipe is connected to the grouting equipment via a valve; Multiple grouting branch pipes are connected to the main grouting pipe, and each grouting branch pipe is provided with multiple grout outlet holes. Multiple flow sensors are arranged between two adjacent grout outlets of the grouting branch pipe; Multiple grouting pressure regulators are provided, and each grout outlet is connected to a grouting pressure regulator. The outlet end of the grouting pressure regulator is provided with a rotary grouting hole, and the outlet end of the rotary grouting hole is located at each grouting position in the soil. The grouting pressure regulator includes: A cylindrical outer shell, wherein a hollow cavity is formed inside the cylindrical outer shell, and the rotating spray hole is provided on the top wall of the cylindrical outer shell; A grouting pipe integrally connected to the cylindrical outer shell, wherein the outlet end of the grouting pipe extends into the cavity, the inlet end of the grouting pipe extends out of the cavity, and the inlet end of the grouting pipe is provided with an external thread; A movable grout-blocking valve is installed inside the cavity, and the movable grout-blocking valve is used to block the outlet end of the grouting pipe; A spring is disposed within the cavity, wherein the upper end of the spring abuts against the top wall of the cylindrical outer shell, and the lower end of the spring abuts against the movable slurry blocking valve; The movable grout-blocking valve includes an upper ring plate, a lower ring plate, a grout-blocking valve, and several structural rods disposed within the cavity. The grout-blocking valve is located at the outlet end of the grouting pipe. The upper ring plate, the lower ring plate, and the movable grout-blocking valve are connected by several structural rods. The lower ring plate is sleeved on the outer side wall of the grouting pipe, and a first ball bearing is provided between the inner side wall of the lower ring plate and the outer side wall of the grouting pipe for the lower ring plate to slide up and down along the outer side wall of the grouting pipe. The upper ring plate is sleeved on the inner side wall of a cylindrical shell at the upper part of the outlet end of the grouting pipe, and a second ball bearing is provided between the outer side wall of the upper ring plate and the inner side wall of the cylindrical shell for the upper ring plate to slide up and down along the inner side wall of the cylindrical shell. The upper end of the spring abuts against the top wall of the cylindrical outer shell, and the lower end of the spring abuts against the top of the upper ring plate; The outlet end of the grouting pipe and the grout-blocking valve are located at the lower part of the lower end of the spring; The flow sensor is a clamp-type flow sensor; The grouting construction method includes: Arrange the main grouting pipe and branch pipe according to the grouting requirements, and determine the number and location of the grout outlet holes of the branch pipe; Flow sensors are arranged between the grout outlets along the grouting branch pipe, and the power and data lines of the flow sensors are fixed to the grouting main pipe and the grouting branch pipe. Based on the pressure and injection volume requirements at each grouting location in the soil, the stiffness coefficient of the corresponding spring is determined. After selecting the spring in the grouting pressure regulator based on the stiffness coefficient, the grouting pressure regulator is installed on the corresponding grout outlet. Each grouting pressure regulator is pre-embedded in the grouting position of the precast diaphragm wall in the soil. The grouting branch pipes between the diaphragm wall segments are connected through the grouting main pipe. After the diaphragm wall is constructed, the grouting equipment is connected to the grouting main pipe. Pre-inject clean water into the grouting pipe to clean the hole. After cleaning the hole, maintain the pressure inside the grouting pipe during the cleaning process and close the valve on the main grouting pipe. The grouting pressure is determined by first increasing the spring stiffness coefficient, and then grouting is carried out in an orderly and on-demand manner. After grouting is completed, shut down the grouting equipment, or inject clean water into the grouting pipe to clean the hole as needed according to the formal grouting process. After cleaning the hole, maintain the pressure in the grouting pipe during the cleaning process and close the valve on the main grouting pipe.

2. The grouting construction method as described in claim 1, characterized in that, The grouting pressure is determined by first decreasing the spring constant and then increasing it, allowing for orderly and on-demand grouting, including: Under the action of grouting pressure, the grout flows from the grouting main pipe into the grouting branch pipe, and the actual grouting volume at each grouting position is measured by the flow sensor. By comparing the grouting demand and the actual grouting volume at the grouting location, the grouting pressure of the main grouting pipe is adjusted, and the grouting valves of each grouting pressure regulator are controlled to open or close the grouting process.

3. The grouting construction method as described in claim 1, characterized in that, Controlling the grouting valves of each grouting pressure regulator to open or close the grouting process includes: When the grouting pressure is greater than the sum of the spring force and the external grout force, the grout-blocking valve opens and grouting begins in the grouting pipe; when the grouting pressure is less than the sum of the spring force and the external grout force, the grout-blocking valve closes and grouting is interrupted in the grouting pipe.

4. The grouting construction method as described in claim 1, characterized in that, Based on the pressure and injection volume requirements at the grouting location in the soil, the spring stiffness coefficient is determined, and the spring in the grouting pressure regulator is selected based on the stiffness coefficient, including: When two grouting pressure regulators are located, one close to the main grouting pipe and the other far from it; if the grouting demand at the far-distance grouting pressure regulator is large, then, while ensuring the grouting pressure, the far-distance grouting pressure regulator should select a spring with a smaller stiffness coefficient, and the near-distance grouting pressure regulator should select a spring with a larger stiffness coefficient. By comparing the required grouting volume at the grouting location with the actual grouting volume, the grouting pressure of the main grouting pipe is adjusted, and the grouting valves of each grouting pressure regulator are controlled to open or close the grouting process, including: When the pressure in the grouting main pipe is controlled to be greater than the sum of the force of the smaller stiffness coefficient spring and the force of the external grout, but less than the sum of the force of the larger stiffness coefficient spring and the force of the external grout, the grouting pressure regulator of the smaller stiffness coefficient spring at a distance opens. During the grouting process, the grouting pressure is increased based on the grouting volume measured by the flow sensor between the grouting pressure controllers. When the grouting pressure is greater than the sum of the force of the large stiffness coefficient spring and the force of the external grout, the grout blocking valve of the grouting pressure controller at the nearest point will open, and the grouting pressure controllers at both locations will grout together.

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