An energy-saving grouting system and grouting method applicable to high-pressure water-rich strata

Abstract

The present invention discloses an energy-saving grouting system applicable to high-pressure water-rich formations, comprising: an improved energy-saving grouting machine, which includes a boosting drive module, wherein: the boosting drive module includes: a slurry piston cylinder, a water pressure boosting cylinder and a water pressure boosting sleeve, and the slurry piston cylinder and the water pressure boosting cylinder are connected in a stepped manner front and back in the axial direction; two channels are provided at the front end of the slurry piston cylinder. A slurry piston having the same inner diameter as that of the slurry piston cylinder is coaxially sleeved in the slurry piston cylinder, and the slurry piston can slide back and forth in the slurry piston cylinder; a slurry piston rod is connected to the rear end of the slurry piston, and the slurry piston rod passes through the rear end of the water pressure boosting cylinder backward and is connected to a motor. The high-pressure water chamber is connected to the high-pressure water pipeline in the formation for receiving high-pressure water to push the water pressure boosting sleeve and the slurry piston to slide forward. By using this device, the existing high-pressure water resources in the environment are used as auxiliary driving forces to complete the grouting operation with extremely high water pressure under the conditions of low energy consumption and low power.

Description

Technical Field

[0001] The present invention belongs to the technical field of grouting water plugging in tunnel engineering, and particularly relates to an energy-saving grouting system and a grouting method applicable to high-pressure water-rich strata. Background Technique

[0002] The southwestern mountainous areas of our country are adjacent to the Qinghai-Tibet Plateau, with extremely rich water resources and are located in the areas where multiple large rivers flow through, and the surface and groundwater systems are developed. As the transportation construction network in our country continues to extend to this region, the tunnel engineering in this region faces the problems of large burial depth, high water pressure, and almost infinite water supply. Therefore, using grouting technology to block the hydraulic channels and provide a basic working environment for tunnel excavation and construction is an almost inevitable key construction link.

[0003] When conventional tunnel engineering conducts grouting reinforcement and water plugging, the water head pressure is often below 2 MPa (200 m water head height). However, in the southwestern mountainous areas, the hydraulic channels have good connectivity, large water volume, and large topographic elevation difference, and the water head pressure can reach more than 20 MPa (2000 m water head height). To overcome such a huge pressure and inject the grout into the surrounding rock, the performance and power of conventional piston grouting equipment are difficult to meet, and special gear mechanical pump grouting equipment needs to be used for grouting operations. The equipment cost is high, the operation power consumption is high, and the grouting speed is slow. Summary of the Invention

[0004] The purpose of the present invention is to provide an energy-saving grouting system and a grouting method applicable to high-pressure water-rich strata, which use the existing high-pressure water resources in the environment as an auxiliary driving force to complete the grouting operation of extremely high water pressure under low energy consumption and low power, avoid the use of ultra-conventional high-pressure grouting machines, reduce equipment loss and operation energy consumption, can not only effectively improve the grouting construction efficiency, but also realize the utilization of part of the underground water resources.

[0005] The present invention adopts the following technical solutions: An energy-saving grouting system applicable to high-pressure water-rich strata, comprising: an improved energy-saving grouting machine, and the improved energy-saving grouting machine comprises: a boosting drive module, wherein:

[0006] The boosting drive module comprises: a slurry piston cylinder, a water pressure boosting cylinder, and a water pressure boosting sleeve. The inner diameter of the slurry piston cylinder is smaller than the inner diameter of the water pressure boosting cylinder, and the two are connected in a stepped manner front and back in the axial direction, and the inner cavities are connected; and the inner cavities are connected; two channels are opened at the front end of the slurry piston cylinder, one is a slurry outlet, and the other is a slurry suction port.

[0007] A slurry piston with the same inner diameter as the slurry piston cylinder is coaxially sleeved in the slurry piston cylinder. The slurry piston can slide back and forth in the slurry piston cylinder, forming a variable-size slurry cavity with the front end of the slurry piston cylinder; a slurry piston rod is connected to the rear end of the slurry piston, and the slurry piston rod passes through the rear end of the water pressure boosting cylinder backward and is connected to the motor.

[0008] The water pressure boost sleeve is a cylindrical cylinder with open ends. The outer wall of the rear end of the cylindrical cylinder is disc-shaped. It is coaxially sleeved outside the slurry piston rod, and the front end fits tightly with the rear end of the slurry piston. The rear end disc is located in the water pressure boost cylinder, fits with the inner wall of the water pressure boost cylinder, and is sealed with the front section of the water pressure boost cylinder to form a high-pressure water chamber.

[0009] The high-pressure water chamber is connected to the high-pressure water pipeline in the formation, and is used to receive high-pressure water to push the water pressure booster sleeve and the slurry piston to slide forward, push the slurry to overflow from the slurry outlet, and the water in the high-pressure water chamber becomes pressureless water. When the slurry piston slides backward, the pressureless water in the high-pressure water chamber is discharged.

[0010] Furthermore, a high-pressure water bag is provided in the high-pressure water chamber of the water pressure boost cylinder to receive high-pressure water. The high-pressure water bag is cylindrical and coaxially sleeved outside the limiting sleeve. An opening is provided at the rear end thereof for communicating with the high-pressure water. After receiving water, the high-pressure water bag can expand in the high-pressure water chamber to push the water pressure boost sleeve.

[0011] Furthermore, the improved energy-saving grouting machine also includes a travel switch module, which includes a water supply dial, a drainage dial, a lever, a conductive bridge and a conductive seat, wherein:

[0012] The water supply dial is a metal disc, which is coaxially sleeved and fixed on the part of the slurry piston rod located outside the water pressure booster cylinder;

[0013] The water discharge dial is a metal disc, which is coaxially sleeved and fixed on the slurry piston rod and is located at the rear end of the water supply dial;

[0014] There are two conductive seats, which are spaced apart from each other and are located in the space between the water supply dial and the drainage dial; both conductive seats are copper conductive sheets, which are used to connect to the power supply;

[0015] The conductive bridge is a rod with a permanent magnet wrapped inside and a copper conductor covered outside. It is tilted and set between the two conductive seats. One end of the bridge is fixed, and the other free end can swing back and forth between the two conductive seats to achieve contact and connection with the front or rear conductive seat.

[0016] The lever is an insulating rod-shaped body, one end of which is connected to the fixed end of the conductive bridge, and the other end extends into the space between the water supply dial and the drainage dial. At the end of the grouting stroke of the slurry piston rod reciprocating back and forth, it touches the water supply dial and the drainage dial, is moved by the water supply dial and the drainage dial, and drives the free end of the conductive bridge to swing back and forth.

[0017] Furthermore, the improved energy-saving grouting machine also includes a water inlet and outlet module, which includes a shell, a water supply electromagnetic head, a drainage electromagnetic head, an axis iron rod and an isolation piston, wherein:

[0018] The housing is horizontally arranged, and a magnetic chamber connected to it is provided at each of its front and rear ends.

[0019] The water supply solenoid valve and the drain solenoid valve are arranged in the magnetic chamber, one at each end. Among them, the water supply solenoid valve is arranged in the magnetic chamber at the rear end, and the water supply solenoid valve is connected between the conductive base at the rear end and the power supply. The drain solenoid valve is connected between the conductive base at the front end and the power supply.

[0020] A high-pressure water inlet, a low-pressure water outlet and a communication water port are opened on the housing. The high-pressure water inlet and the low-pressure water outlet are located on one side of the housing and are arranged at intervals along the length direction of the housing. The communication water port is opened on the opposite side of the housing and is located in the middle part between the high-pressure water inlet and the low-pressure water outlet. The high-pressure water inlet is communicated with the high-pressure water pipeline, the low-pressure water outlet is emptied, and the communication water port is communicated with the high-pressure water bladder pipeline.

[0021] The axial iron rod is horizontally arranged in the housing, and two groups of isolation pistons are sleeved and fixed on it at intervals. The two groups are respectively located at the front and rear ends of the axial iron rod, and each group has two arranged at intervals. Each isolation piston is in close fit with the inner wall of the housing. In the same group, between the two isolation pistons, and between the two adjacent isolation pistons in the two groups, chambers are respectively formed with the housing.

[0022] Under the action of electromagnetic force, the axial iron rod can move back and forth to block the low-pressure water outlet, so that the high-pressure water inlet is communicated with the communication water port, or block the high-pressure water inlet, so that the low-pressure water outlet is communicated with the communication water port.

[0023] Furthermore, the improved energy-saving grouting machine further includes a limit sleeve, which is a cylindrical barrel with openings at both front and rear ends. It is coaxially sleeved in the water pressure boosting sleeve and sleeved outside the slurry piston rod. The rear end of the limit sleeve is located outside the rear end of the water pressure boosting cylinder, and its front end does not adhere to the front end inside the water pressure boosting sleeve. Its rear end is threadedly connected to the water pressure boosting cylinder, and the outer wall of its rear end is a disc-shaped convex outward, which is clamped and fitted to the outer wall of the rear end of the water pressure boosting cylinder.

[0024] Furthermore, it also includes a water storage bucket, a pulp-making stirring bucket and a slurry storage bucket. The water storage bucket is connected to the communication water port through a pipeline and is used to receive and store the non-pressure water in the high-pressure water chamber.

[0025] The pulp-making stirring bucket is connected to the water storage bucket through a pipeline, and non-pressure water is introduced into it for stirring and preparing slurry.

[0026] The slurry storage bucket is communicated with the pulp-making stirring bucket through a pipeline and is also connected to the slurry suction port through a pipeline. It is used to receive and store the stirred slurry and transport it to the slurry suction port.

[0027] Furthermore, the diameter of the front section of the water pressure boosting sleeve is the same as the inner diameter of the slurry piston cylinder, and the sum of the length of the front section and the thickness of the slurry piston is the same as the length of the inner cavity of the slurry piston cylinder.

[0028] Furthermore, the high-pressure water in the formation is supplied by a sump well, which is located inside the tunnel and outside the grouting influence area, and is excavated vertically downward.

[0029] The present invention also discloses a construction method of the above energy-saving grouting system applicable to high-pressure water-rich formations, and the construction method is as follows:

[0030] Step 1: Excavate a sump well vertically downward inside the tunnel and outside the grouting influence area;

[0031] Step 2: Connect the high-pressure water inlet to the pipeline of the sump well; prepare slurry in the mixing barrel and transport it to the slurry storage barrel;

[0032] Step 3: The motor drives the slurry piston rod, and at the same time, high-pressure water enters the high-pressure water bag from the high-pressure water inlet, driving the slurry piston to the front end of the slurry piston cylinder, and the water content in the high-pressure water bag reaches the maximum; then the drainage dial rotates to move the lever, making the drainage electromagnetic head energized, closing the high-pressure water inlet, and opening the low-pressure water outlet, disconnecting the water in the high-pressure water bag from the high-pressure water in the sump well and becoming non-pressure water;

[0033] Step 4: The motor drives the slurry piston rod to move backward, driving the slurry piston to move backward, forming a negative pressure in the slurry piston cylinder, sucking the slurry in the slurry storage barrel into the slurry piston cylinder through the slurry suction port, and the slurry piston pushes the water pressure boosting sleeve to move backward, squeezing the non-pressure water in the high-pressure water bag, flowing through the communication water port and the low-pressure water outlet, and discharging it to the water storage barrel;

[0034] During the slurry suction process, the drainage dial disengages from the lever, and the conductive bridge and the conductive seat remain in contact and connected under the action of the magnet, making the drainage electromagnetic head continuously energized, the high-pressure water inlet continuously closed, and the low-pressure water outlet continuously open until the non-pressure water is completely discharged;

[0035] Step 5: The water supply dial contacts the lever, moves the lever, making the water supply electromagnetic head energized, opening the high-pressure water inlet, and closing the low-pressure water outlet;

[0036] The high-pressure water bag is connected to the high-pressure water in the sump well, high-pressure water continuously flows into the high-pressure water bag, the high-pressure water bag expands continuously, pushing the water pressure boosting sleeve to move forward, and the thrust is transmitted to the slurry piston and the slurry piston rod, and the slurry piston moves forward, squeezing the slurry in the slurry piston cylinder, and injecting the slurry into the drill hole through the slurry outlet;

[0037] During the process of high-pressure water inflow, the water supply dial disengages from the lever, and the electric bridge and the conductive seat remain in contact and connected under the action of the magnetic force, making the water supply electromagnetic head continuously energized, the high-pressure water inlet continuously open, and the low-pressure water outlet continuously closed;

[0038] Step 6: Repeat Steps 4 - 5, continuously grout into the borehole until the total amount of grout injected into the grouting hole reaches the designed value.

[0039] Further, after Step 6, it further includes: sequentially conveying the water in the water storage bucket to clean the grout mixing bucket, grout storage bucket, and grout piston cylinder.

[0040] The beneficial effects of the present invention are as follows: 1. Utilize the high - pressure water resources in the formation as an auxiliary driving force to drive the grout piston to slide and inject the grout into the grouting hole, completing the grouting operation under extremely high water pressure with low energy consumption and low power, realizing the utilization of some underground water resources, saving energy consumption, and improving the grouting efficiency. 2. Set up a grout piston cylinder and a water pressure boosting cylinder connected axially. The water pressure boosting sleeve is used as a transmission device for the water pressure of high - pressure water to transmit the pressure to the grout piston. The large cross - section is subjected to water pressure, and the small cross - section pushes the piston to squeeze the grout and inject the grout into the grouting hole, realizing the application of the water pressure of high - pressure water in a closed space. 3. Set up a high - pressure water bag. The high - pressure water is injected into the high - pressure water bag, and through the expansion of the high - pressure water bag, it realizes the pushing of the water pressure boosting sleeve. On the one hand, it better realizes the sealing performance. On the other hand, it reduces the frictional loss during boosting. 4. Set up a limit sleeve to prevent the water bag from wrapping the piston rod after expansion, which may hinder the movement; and prevent the piston from retreating and disengaging from the cylinder. Description of the Drawings

[0041] Figure 1 It is a schematic diagram of an energy - saving grouting system applicable to high - pressure water - rich formations;

[0042] Figure 2 It is a schematic diagram of the core module of an energy - saving grouting machine applicable to high - pressure water - rich formations;

[0043] Figure 3 It is a schematic diagram of the boosting drive module of an energy - saving grouting machine applicable to high - pressure water - rich formations;

[0044] Figure 4 It is a schematic diagram (3D) of the boosting drive module of an energy - saving grouting machine applicable to high - pressure water - rich formations;

[0045] Figure 5 It is a schematic diagram of the travel switch module of an energy - saving grouting machine applicable to high - pressure water - rich formations;

[0046] Figure 6 It is a schematic diagram of the water inlet and outlet module of an energy - saving grouting machine applicable to high - pressure water - rich formations;

[0047] Figure 7 It is a schematic diagram (I) of the operating state of the core module of an energy - saving grouting machine applicable to high - pressure water - rich formations;

[0048] Figure 8Schematic diagram (II) of the operating state of the core module of an energy-saving grouting machine applicable to high-pressure water-rich strata;

[0049] Figure 9 Schematic diagram (III) of the operating state of the core module of an energy-saving grouting machine applicable to high-pressure water-rich strata;

[0050] Figure 10 Schematic diagram (IV) of the operating state of the core module of an energy-saving grouting machine applicable to high-pressure water-rich strata;

[0051] Wherein: 1. Sump; 2. Filter and sedimentator; 3. Water hammer eliminator; 4. Improved energy-saving grouting machine;

[0052] 41. Boost drive module; 42. Travel switch module; 43. Water inlet and outlet module;

[0053] 411. Slurry piston cylinder; 412. Slurry piston; 413. Slurry piston rod; 414. Check valve; 415. Hydraulic boost cylinder; 416. Hydraulic boost sleeve; 417. Limit sleeve; 418. High-pressure water bag; 419. Water inlet and outlet pipe;

[0054] 421. Water supply dial; 422. Drainage dial; 423. Dial rod; 424. Conductive bridge; 425. Conductive seat;

[0055] 431. Water supply solenoid head; 432. Drainage solenoid head; 433. Axial iron rod; 434. Isolation piston; 435. High-pressure water inlet; 436. Low-pressure water outlet; 437. Connecting water port;

[0056] 5. Water storage bucket; 6. Pulp mixing bucket; 7. Slurry storage bucket; 8. Grouting hole. Detailed implementation method

[0057] The present invention will be described in detail below in conjunction with the accompanying drawings and the detailed implementation method.

[0058] The present invention discloses an energy-saving grouting system applicable to high-pressure water-rich strata. As Figures 1 to 4 shown, it includes an improved energy-saving grouting machine 4. The improved energy-saving grouting machine 4 is arranged in the tunnel and is connected to the sump 1 through a pipeline. Its slurry outlet is connected to the grouting hole 8 through a pipeline. The improved energy-saving grouting machine 4 is used to introduce high-pressure water into it, and utilizes the energy of the high water pressure in the strata to assist in driving the grouting piston to advance, and injects the slurry into the surrounding rock through the grouting hole 8.

[0059] High-pressure water in the formation is obtained from the sump 1, which is located inside the tunnel and outside the grouting influence area. It is excavated vertically downward and serves as a channel for leading out the high-pressure water in the formation, achieving full and good connection with the high-pressure water in the formation. Its longitudinal distance from the tunnel excavation face is greater than twice the length of the grouting reinforcement section, and its depth is more than twice the grouting reinforcement range. A valve is provided at the upper orifice of the sump 1, which can be opened or closed to provide high-pressure water source according to construction needs. For example, in the curtain grouting scheme design: the longitudinal reinforcement length is 20m, and the cross-sectional reinforcement range is 5m outside the tunnel excavation contour line. Then the distance between the sump and the excavation face is greater than 40m, and the depth is greater than 10m.

[0060] As Figures 5 to 10 shown, the improved energy-saving grouting machine 4 includes: a boosting drive module 41, a travel switch module 42, and a water inlet and outlet module 43. Among them: the boosting drive module 41 includes: a slurry piston cylinder 411, a water pressure boosting cylinder 415, and a water pressure boosting sleeve 416. The inner diameter of the slurry piston cylinder 411 is smaller than that of the water pressure boosting cylinder 415, and the two are connected in a stepped manner front and back axially, and the inner cavities are connected. Two channels are opened at the front end of the slurry piston cylinder 411, one is a slurry outlet, and the other is a slurry suction port. One-way valves 414 are provided in both the slurry outlet and the slurry suction port. The rear end of the water pressure boosting cylinder 415 is connected with a water inlet and outlet pipe 419.

[0061] Both the slurry piston cylinder 411 and the water pressure boosting cylinder 415 are steel cylinders. A slurry piston 412 with the same inner diameter as it is coaxially sleeved in the slurry piston cylinder 411. The slurry piston 412 can slide back and forth in the slurry piston cylinder 411, forming a variable-sized slurry chamber with the front end of the slurry piston cylinder 411. A slurry piston rod 413 is connected to the rear end of the slurry piston 412. The slurry piston rod 413 passes through the rear end of the water pressure boosting cylinder 415 backward and is connected to the motor. Specifically, a through hole is opened at the center of the rear end housing of the water pressure boosting cylinder 415, and the rear end of the slurry piston rod 413 passes through the through hole. The radius of the through hole is R / 2. A disc is integrally connected to the front end of the slurry piston rod 413, and the disc is adhesively connected to the slurry piston 412.

[0062] The inner diameter of the above slurry piston cylinder 411 is R, and the inner diameter of the water pressure boosting cylinder 415 is 2R, which is twice the inner diameter of the slurry piston cylinder 411.

[0063] The water pressure boosting sleeve 416 is a columnar cylinder with both ends open. The outer wall of the rear end of the columnar cylinder is disc-shaped. It is coaxially sleeved outside the slurry piston rod 413. The front end is closely attached to the rear end of the slurry piston 412, and the rear disc is located inside the water pressure boosting cylinder 415 and fits with the inner wall of the water pressure boosting cylinder 415, enclosing a high-pressure water chamber with the front section of the water pressure boosting cylinder 415.

[0064] The high-pressure water chamber is connected to the high-pressure water pipeline in the formation and is used to receive high-pressure water to push the hydraulic pressure boosting sleeve 416 and the slurry piston 412 to slide forward, so as to push the slurry to overflow from the slurry outlet. The water in the high-pressure water chamber becomes non-pressure water, and when the slurry piston 412 slides backward, the non-pressure water in the high-pressure water chamber is discharged.

[0065] In the high-pressure water chamber of the hydraulic pressure boosting cylinder 415, a high-pressure water bag 418 is arranged to receive high-pressure water. The high-pressure water bag 418 is cylindrical, coaxially sleeved outside the limiting sleeve 417 and is located in the hydraulic pressure boosting cylinder 415. Its rear end is provided with an opening, and the opening is bonded to the outer wall of the inlet and outlet water pipe 419 and is connected to the inlet and outlet water pipe 419. After receiving water, the high-pressure water bag 418 can expand in the high-pressure water chamber to push the hydraulic pressure boosting sleeve 416.

[0066] The hydraulic pressure boosting sleeve 416 is a columnar cylinder with a closed front end and an open rear end. The outer wall of the rear end of the columnar cylinder is disc-shaped, and the diameter of the disc is the same as the inner diameter of the hydraulic pressure boosting cylinder 415. It is located in the inner cavities of the slurry piston cylinder 411 and the hydraulic pressure boosting cylinder 415, and is coaxially sleeved outside the slurry piston rod 413. Its length is less than the length of the inner cavity and can slide back and forth in the inner cavity. Its front end is closely attached to the rear end of the slurry piston 412, and the rear disc is located in the hydraulic pressure boosting cylinder 415. The disc and the front section of the hydraulic pressure boosting cylinder 415 are enclosed to form a high-pressure water chamber, and the high-pressure water chamber is connected to the inlet and outlet water pipe 419.

[0067] The diameter of the front section of the above-mentioned hydraulic pressure boosting sleeve 416 is the same as the inner diameter of the slurry piston cylinder 411, and the sum of the length of the front section and the thickness of the slurry piston 412 is the same as the length of the inner cavity of the slurry piston cylinder 411.

[0068] The high-pressure water bag 418 is cylindrical, sleeved outside the limiting sleeve 417 and is located in the high-pressure water chamber of the hydraulic pressure boosting cylinder 415. It is made of high-elastic rubber material. Its rear end is provided with an opening, and the opening is bonded to the inlet and outlet water pipe 419 and is connected. The high-pressure water bag 418 is used to hold high-pressure water. It is made of high-elastic rubber material. When it holds high-pressure water, its volume expands to push the hydraulic pressure boosting sleeve 416, so as to push the slurry piston 412 to push forward and extrude the slurry, providing auxiliary power for high-pressure grouting.

[0069] The limit sleeve 417 is a cylindrical barrel with openings at both the front and rear ends. It is coaxially sleeved inside the hydraulic boost sleeve 416 and outside the slurry piston rod 413. The rear end of the limit sleeve 417 is located outside the rear end of the hydraulic boost cylinder 415, and its front end does not touch the front end inside the hydraulic boost sleeve 416. The limit sleeve 417 and the hydraulic boost sleeve 416 work together to make the high-pressure water chamber of the hydraulic boost cylinder 415 annular. The limit sleeve 417 is made of metal, and its rear end is threadedly connected to the hydraulic boost cylinder 415. The outer wall of its rear end is a disc shape protruding outward, which is clamped and fitted to the outer wall of the rear end of the hydraulic boost cylinder 415.

[0070] The limit sleeve 417 is used to prevent the high-pressure water bag 418 from contacting and squeezing the slurry piston rod 413, which affects the forward and backward movement of the slurry piston rod 413. On the other hand, it fixes the insertion length, and the front end limits the movement distance of the slurry piston rod 413, avoiding the slurry piston rod 413 and the slurry piston 412 from slipping out of the slurry piston cylinder 411 during operation.

[0071] A filter sedimentator 2 is installed on the pipeline between the sump 1 and the improved energy-saving grouting machine 4, which is used to filter out the particles and slag blocks in the high-pressure water flowing out of the sump 1. A water hammer eliminator 3 is installed on the pipeline between the filter sedimentator 2 and the improved energy-saving grouting machine 4. The water hammer eliminator 3 is used to eliminate the huge water hammer formed by the frequent opening and closing of the high-pressure water pipeline, playing a role in protecting the pipeline.

[0072] The water storage bucket 5 is connected to the pipeline of the improved energy-saving grouting machine 4, which is used to temporarily store the non-pressure water discharged by the improved energy-saving grouting machine 4 for subsequent slurry preparation. The slurry mixing bucket 6 is connected to the pipeline of the water storage bucket 5, and it is used to stir and prepare the slurry inside. The slurry storage bucket 7 is connected to the pipeline of the slurry mixing bucket 6, which is used to temporarily store the slurry stirred and prepared in the slurry mixing bucket 6. It is also connected to the suction port pipeline of the improved energy-saving grouting machine 4.

[0073] The operating characteristics of an energy-saving grouting system applicable to high-pressure water-rich strata are analyzed as follows:

[0074] (1) Boosting force: F 助推力 >F 注浆力 ;

[0075] During grouting construction, the grouting pressure needs to be greater than the high-pressure water pressure in the borehole 9, and the high-pressure water pressures in the sump 1 and the borehole 9 are approximately equal, so P 水 =P 浆 ;

[0076] F 助推力 =P 水 *S 环 =P 水 *π((2R) 2 -(R / 2)2 ) = 3.75πR 2 P 水 ;

[0077] F 注浆力 = P 水 *S 活塞 = P 浆 *πR 2 = πR 2 P 浆 ;

[0078] F 助推力 = 3.75F 注浆力 ;

[0079] That is, under normal circumstances, the grouting stroke of the extruded slurry can occur automatically under the action of the high-pressure water provided by the sump 1, and the conventional mechanical force F (conventional thrust) provided by the grouting machine itself can be zero.

[0080] (2) Recycling of water circulation: V 高压水消耗 > V 制备浆液耗水 ;

[0081] During the reciprocating motion of the slurry piston 412 and the water pressure boosting sleeve 416, they always remain in close contact, and the stroke lengths of both are equal, both being L. Then:

[0082] Slurry injected per stroke: V 浆液 = L*S 活塞 = L*πR 2 = πR 2 L;

[0083] High-pressure water consumed per stroke: V 高压水消耗 = L*S 环 = L*π((2R) 2 -(R / 2) 2 ) = 3.75πR 2 L;

[0084] Water consumption for preparing slurry is approximately V 制备浆液耗水 = 0.7V 浆液 = 0.7πR 2 L;

[0085] Therefore, V 高压水消耗 is approximately 5.4 times that of V 制备浆液耗水 . The discharged water is temporarily stored in the water storage bucket 5 and is used to wash the residual slurry in the equipment and pipelines after the grouting work of this hole is completed.

[0086] The above-mentioned travel switch module 42 includes: a water supply dial 421, a drainage dial 422, a dial rod 423, a conductive bridge 424, and a conductive seat 425, where:

[0087] The water supply dial 421 is a metal disc, which is coaxially sleeved and fixed on the part of the slurry piston rod 413 located outside the water pressure booster cylinder 415, and is used to toggle the dial rod 423 to open the high-pressure water injection passage and close the drainage passage at the same time.

[0088] The drainage dial 422 is a metal disc, which is coaxially sleeved and fixed on the slurry piston rod 413 and is located at the rear end of the water supply dial 421. The distance between the water supply dial 421 and the water supply dial 421 is the stroke length of the slurry piston 412. It is used to move the lever 423 to open the drainage passage and close the high-pressure water injection passage at the same time.

[0089] There are two conductive seats 425, both of which are copper conductive sheets, which are arranged at intervals in front and back, and permanent magnets are arranged on the opposite backs, and are located in the space between the water supply dial 421 and the drainage dial 422; the two conductive seats 425 are respectively connected to the water supply electromagnetic head 431 and the drainage electromagnetic head 432 through wires.

[0090] The conductive bridge 424 is a rod with a permanent magnet wrapped inside and a copper conductor covered outside. It is tiltedly arranged between the two conductive seats 425. One end of the conductive bridge 424 is fixed, and the other free end can swing back and forth between the two conductive seats 425 to achieve contact and connection with the front or rear conductive seat 425. It is connected to one end of the power supply at the axis center and swings synchronously when the lever 423 is moved.

[0091] One end of the lever 423 is connected to the fixed end of the conductive bridge 424, and the other end extends into the space between the water supply dial 421 and the drainage dial 422. At the end of the grouting stroke of the slurry piston rod 413 which reciprocates back and forth, it touches the water supply dial 421 and the drainage dial 422, and is moved by the water supply dial 421 and the drainage dial 422, and drives the free end of the conductive bridge 424 to swing back and forth.

[0092] When the water supply dial 421 moves the lever 423, the conductive bridge 424 is connected to the front conductive seat 425 and energized, and is adsorbed by the permanent magnet to keep the water supply electromagnetic head 431 continuously energized, and the high-pressure waterway continuously unobstructed; when the drainage dial 422 moves the lever 423, the conductive bridge 424 is connected to the rear conductive seat 425 and energized, and is adsorbed by the permanent magnet to keep the drainage electromagnetic head 432 continuously energized, and the drainage waterway continuously unobstructed.

[0093] The water inlet and outlet module 43 includes: a housing, a water supply electromagnetic head 431, a water discharge electromagnetic head 432, an axial iron rod 433 and an isolation piston 434; wherein:

[0094] The shell is arranged horizontally, and each of the front and rear ends thereof is provided with a magnetic chamber connected thereto;

[0095] The water supply solenoid valve 431 and the drain solenoid valve 432 are arranged in the magnetic chamber, with one at each end. The water supply solenoid valve 431 is arranged in the magnetic chamber at the rear end and is connected between the conductive base 425 at the rear end and the power supply. The drain solenoid valve 432 is connected between the conductive base 425 at the front end and the power supply.

[0096] The high-pressure water inlet 435, the low-pressure water outlet 436, and the communication water inlet 437 are all opened on the housing and are communicated with the inner cavity of the housing; the high-pressure water inlet 435 and the low-pressure water outlet 436 are located on one side of the housing and are arranged at intervals along the length direction of the housing; the communication water inlet 437 is opened on the side of the housing opposite to the high-pressure water inlet 435 and the low-pressure water outlet 436 and is located in the middle part between the high-pressure water inlet 435 and the low-pressure water outlet 436; the high-pressure water inlet 435 is communicated with the high-pressure water pipeline, the low-pressure water outlet 436 is emptied, and the communication water inlet 437 is communicated with the high-pressure water bladder 418 through a pipeline.

[0097] The axial center iron rod 433 is horizontally arranged in the housing, and two groups of isolation pistons 434 are sleeved and fixed thereon at intervals. The two groups are respectively located in the front and rear of the axial center iron rod 433, and each group has two arranged at intervals. Each isolation piston 434 is in close fit with the inner wall of the housing. In the same group, between the two isolation pistons 434, and between the two adjacent isolation pistons 434 in the two groups, chambers are respectively formed with the housing.

[0098] Under the action of the electromagnetic force, the axial center iron rod 433 can move back and forth to block the low-pressure water outlet 436, so that the high-pressure water inlet 435 and the communication water inlet 437 are communicated, or block the high-pressure water inlet 435, so that the low-pressure water outlet 436 and the communication water inlet 437 are communicated.

[0099] Specifically: when the water supply solenoid valve 431 is energized, the axial center iron rod 433 moves towards the water supply solenoid valve 431. The two isolation pistons 434 at the front end are located in the front and rear of the low-pressure water outlet 436, blocking the water channel of the low-pressure water outlet 436, so that the high-pressure water inlet 435 and the communication water inlet 437 are communicated, and the high-pressure water is injected into the high-pressure water bladder 418 through the inlet and outlet pipe 419.

[0100] When the drain solenoid valve 432 is energized, the axial center iron rod 433 moves towards the drain solenoid valve 432. The two isolation pistons 434 at the rear end are located in the front and rear of the high-pressure water inlet 435, blocking the water channel of the high-pressure water inlet 435, so that the low-pressure water outlet 436 and the communication water inlet 437 are communicated, and the water in the high-pressure water bladder 418 is squeezed out during the backward movement of the slurry piston rod 413 and discharged into the water storage bucket 5.

[0101] The grouting method of the above energy-saving grouting system applicable to high-pressure water-rich strata is as follows:

[0102] Step 1: Vertically excavate the sump 1 inside the tunnel and outside the grouting influence area.

[0103] Step 2: Connect the high-pressure water inlet 435 to the sump 1 through a pipeline; prepare the slurry in the mixing barrel 6 and transport it to the slurry storage barrel 7.

[0104] Step 3: The motor drives the slurry piston rod 413. At the same time, high-pressure water enters the high-pressure water bag 418 from the high-pressure water inlet 435, driving the slurry piston 412 to the forefront of the slurry piston cylinder 411, and the water volume in the high-pressure water bag 418 reaches the maximum; then the drainage dial 422 toggles the lever 423 to energize the drainage electromagnetic head 432, close the high-pressure water inlet 435, and open the low-pressure water outlet 436. The water in the high-pressure water bag 418 is disconnected from the high-pressure water in the sump 1 and becomes non-pressure water.

[0105] Step 4: The motor drives the slurry piston rod 413 to move backward, driving the slurry piston 412 to move backward. A negative pressure is formed in the slurry piston cylinder 411, and the slurry in the slurry storage barrel 7 is sucked into the slurry piston cylinder 411 through the slurry suction port. The slurry piston 412 pushes the water pressure boost sleeve 416 to move backward, squeezing the non-pressure water in the high-pressure water bag 418, flowing through the communication water port 437 and the low-pressure water outlet 436, and discharging it to the water storage barrel 5.

[0106] During the slurry suction process, the drainage dial 422 disengages from the lever 423, and the conductive bridge 424 and the conductive seat 425 remain in contact and connected under the action of the magnet, keeping the drainage electromagnetic head 432 continuously energized, the high-pressure water inlet 435 continuously closed, and the low-pressure water outlet 436 continuously open until the non-pressure water is completely discharged.

[0107] Step 5: The water supply dial 421 contacts the lever 423, toggles the lever 423 to energize the water supply electromagnetic head 431, opens the high-pressure water inlet 435, and closes the low-pressure water outlet 436;

[0108] The high-pressure water bag 418 is connected to the high-pressure water in the sump 1, and high-pressure water continuously flows into the high-pressure water bag 418. The high-pressure water bag 418 continuously expands, pushing the water pressure boost sleeve 416 to move forward. The thrust is transmitted to the slurry piston 412 and the slurry piston rod 413, and the slurry piston 412 moves forward, squeezing the slurry in the slurry piston cylinder 411, and injecting the slurry into the drill hole 9 through the slurry outlet;

[0109] During the process of high-pressure water inflow, the water supply dial 421 disengages from the lever 423, and the electric bridge 424 and the conductive seat 425 remain in contact and connected under the action of the magnetic force, keeping the water supply electromagnetic head 431 continuously energized, the high-pressure water inlet 435 continuously open, and the low-pressure water outlet 436 continuously closed.

[0110] Step 6: Repeat steps 4 to 5 to continuously inject grout into the borehole 9 until the total amount of slurry injected into the grouting hole 9 reaches the designed value. After step 6, the process also includes: sequentially transporting the water in the water storage tank 5 and cleaning the slurry mixing tank 6, the slurry storage tank 7 and the slurry piston cylinder 411.

[0111] The energy-saving grouting system suitable for high-pressure water-rich strata in the present invention is applied to the actual tunnel construction process, as follows:

[0112] S1: Set up water collection well 1:

[0113] In the tunnel, and outside the grouting influence area, at a distance from the excavation surface greater than 2 times the length of the grouting reinforcement section, it is excavated vertically downward. The depth of the water collection well 1 is more than 2 times the grouting reinforcement range, and the diameter is greater than 100mm. It is fully and well connected with the high-pressure water in the stratum. The orifice of the water collection well 1 is provided with a valve, which can be opened or closed to provide a high-pressure water source according to construction needs; if the curtain grouting scheme is designed: the longitudinal reinforcement length is 20m, and the cross-sectional reinforcement range is 5m outside the tunnel excavation contour line, then the water collection well is greater than 40m from the excavation surface and the depth is greater than 10m.

[0114] S2: Setting grouting hole 8:

[0115] Grouting holes 8 are drilled according to the position, angle and depth designed in the grouting plan.

[0116] S3: Connect the pipelines to form a system:

[0117] S4: Preparation of slurry:

[0118] Water and grouting materials are added into the mixing barrel 6, and slurry is prepared by sufficient stirring, and the slurry is transferred to a slurry storage barrel for standby use.

[0119] S5: Grouting operation:

[0120] Take a bucket of slurry as an example.

[0121] S51: The state is switched to slurry suction:

[0122] like Figure 7 As shown, the slurry piston 412, the slurry piston rod 413, and the water pressure boost sleeve 416 are at the front end, the slurry in the slurry piston cylinder 411 is zero, and the water content in the high-pressure water bag 418 in the water pressure boost cylinder 415 reaches the maximum;

[0123] The drainage dial 422 moves the lever 423 to energize the drainage electromagnetic head 432, close the high-pressure water inlet 435, and open the low-pressure water outlet 436; at this time, the water in the high-pressure water bag 418 is disconnected from the high-pressure water source in the water collection well 1 and becomes pressureless water.

[0124] S52: drainage and slurry suction;

[0125] like Figure 8 The slurry piston 412 and the slurry piston rod 413 move backward under the operation of the conventional grouting machine mechanism, and negative pressure is formed in the slurry piston cylinder 411, and the slurry is sucked from the slurry storage barrel 7 through the one-way valve 414 of the slurry suction port.

[0126] At the same time, the slurry piston rod 413 pushes the water pressure boost sleeve 416 to move backward, squeezing the pressureless water in the high-pressure water bag 418, flowing through the water inlet and outlet pipes 419, the connecting water port 437, and the low-pressure water outlet 436, and discharged into the water storage barrel 5.

[0127] During this process, the drain dial 422 is separated from the lever 423, but the conductive bridge 424 and the conductive seat 425 remain in contact and connection under the action of the magnet, so that the drain electromagnetic head 432 is continuously energized, the high-pressure water inlet 435 is continuously in a closed state, and the low-pressure water outlet 436 is continuously in an open state.

[0128] S53: Status switched to grouting:

[0129] like Figure 9 As shown, the slurry piston 412, the slurry piston rod 413, and the water pressure boost sleeve 416 are at the rear end, the slurry in the slurry piston cylinder 411 is fully absorbed, and the water content in the high-pressure water bag 418 in the water pressure boost cylinder 415 is reduced to a minimum;

[0130] The water supply dial 421 moves the lever 423 to energize the water supply electromagnetic head 431, open the high-pressure water inlet 435, and close the low-pressure water outlet 436;

[0131] At this time, the water in the high-pressure water bag 418 is connected to the high-pressure water source in the water collection well 1 and becomes high-pressure water.

[0132] S54: Water injection:

[0133] like Figure 10 When the water in the high-pressure water bag 418 is connected to the high-pressure water source in the water collection well 1, the high-pressure water actively flows into the high-pressure water bag 418, causing the high-pressure water bag 418 to expand continuously, pushing the water pressure boost sleeve 416 to move forward, forming a strong boost force transmitted to the slurry piston 412 and the slurry piston rod 413, and the slurry piston 412 moves forward, squeezing the slurry in the slurry piston cylinder 411, and injecting the slurry into the borehole 9 through the one-way valve 414 at the slurry outlet;

[0134] During this process, the water supply dial 421 is separated from the lever 423, but the conductive bridge 424 and the conductive seat 425 remain in contact and connection under the action of the magnet, so that the water supply electromagnetic head 431 is continuously energized, the high-pressure water inlet 435 is continuously in an open state, and the low-pressure water outlet 436 is continuously in a closed state.

[0135] Repeat steps S51 - S54. The slurry piston moves back and forth continuously, injecting slurry into the borehole 9 until the slurry in the slurry storage bucket 6 is exhausted.

[0136] S6: Continuously prepare slurry:

[0137] Repeat step S4 to prepare slurry;

[0138] Repeat steps S51 - S54 to consume the slurry in the bucket;

[0139] During the process of repeating step S4, the total designed slurry injection volume of this grouting hole 9 needs to be considered to avoid excessive slurry preparation in the last bucket, that is, "the slurry volume of the last bucket = the total designed slurry injection volume of this hole - the full bucket volume of the first bucket of slurry - the full bucket volume of the second bucket of slurry -...".

[0140] S7: Terminate grouting:

[0141] After the total volume of the slurry injected into this grouting hole 9 reaches the designed value, terminate the grouting operation and cut off the connection between the grouting hole 9 and the system.

[0142] S8: Clean the system and pipelines:

[0143] Use the surplus water in the water storage bucket 5 to clean the slurry mixing bucket 6, the slurry storage bucket 7, the slurry piston cylinder 411 and the pipelines connecting the system in sequence.

[0144] S9: Grout the next hole:

[0145] According to the grouting plan design, drill the next grouting hole and repeat steps S2 - S8 until the grouting of all the boreholes in this grouting operation is completed.

Claims

1. An energy-saving grouting system applicable to high-pressure water-rich strata, characterized in that, Comprising: An improved energy-saving grouting machine (4), the improved energy-saving grouting machine (4) includes a boosting drive module (41), wherein: The boosting drive module (41) includes: a slurry piston cylinder (411), a water pressure boosting cylinder (415) and a water pressure boosting sleeve (416); the inner diameter of the slurry piston cylinder (411) is smaller than the inner diameter of the water pressure boosting cylinder (415), and the two are connected in a stepped manner front and back in the axial direction, and the inner cavities are connected; two channels are opened at the front end of the slurry piston cylinder (411), one is a slurry outlet and the other is a slurry suction port; one-way valves (414) are arranged in both the slurry outlet and the slurry suction port; A slurry piston (412) with the same inner diameter as that of the slurry piston cylinder (411) is coaxially sleeved in the slurry piston cylinder (411), the slurry piston (412) can slide back and forth in the slurry piston cylinder (411), and a variable-sized slurry cavity is formed with the front end of the slurry piston cylinder (411); a slurry piston rod (413) is connected to the rear end of the slurry piston (412), the slurry piston rod (413) passes through the rear end of the water pressure boosting cylinder (415) backward and is connected to a motor; the motor is used to drive the slurry piston rod (413) to move backward; The water pressure boosting sleeve (416) is a columnar cylinder with both ends open, and the outer wall of the rear end of the columnar cylinder is disc-shaped. It is coaxially sleeved outside the slurry piston rod (413), the front end is closely attached to the rear end of the slurry piston (412), and the rear disc is located in the water pressure boosting cylinder (415) and fits with the inner wall of the water pressure boosting cylinder (415), and is closed with the front section of the water pressure boosting cylinder (415) to form a high-pressure water cavity; The high-pressure water cavity is connected to the high-pressure water pipeline in the formation, and is used to receive high-pressure water to push the water pressure boosting sleeve (416) and the slurry piston (412) to slide forward, so as to push the slurry to overflow from the slurry outlet. The water in the high-pressure water cavity becomes non-pressure water. When the slurry piston (412) slides backward, the non-pressure water in the high-pressure water cavity is discharged, and the slurry is sucked into the slurry piston cylinder (411) from the slurry suction port.

2. The energy-saving grouting system applicable to high-pressure water-rich strata according to claim 1, wherein A high-pressure water bag (418) is arranged in the high-pressure water cavity of the water pressure boosting cylinder (415) to receive high-pressure water. The high-pressure water bag (418) is cylindrical, and an opening is provided at the rear end for communicating with high-pressure water. After receiving water, the high-pressure water bag (418) can expand in the high-pressure water cavity to push the water pressure boosting sleeve (416).

3. The energy-saving grouting system applicable to high-pressure water-rich strata according to claim 2, wherein The improved energy-saving grouting machine (4) further includes a travel switch module (42), the travel switch module (42) includes a water supply dial (421), a drainage dial (422), a lever (423), a conductive bridge (424) and a conductive seat (425), wherein: The water supply dial (421) is a metal disc and is coaxially sleeved and fixed on the part of the slurry piston rod (413) located outside the water pressure boosting cylinder (415); The drainage dial (422) is a metal disc and is coaxially sleeved and fixed on the slurry piston rod (413) and is located at the rear end of the water supply dial (421); The conductive seats (425) are two in number, arranged at intervals in front and back, and located in the space between the water supply dial (421) and the drainage dial (422); the two conductive seats (425) are both copper conductive sheets, and are used to connect to a power source; The conductive bridge (424) is a rod body with a permanent magnet wrapped inside and a copper conductor covered outside, and is obliquely arranged between the two conductive seats (425). One end of the bridge is fixed, and the other free end can swing back and forth between the two conductive seats (425) to achieve contact and connection with the front or rear conductive seat (425); The lever (423) is an insulating rod-shaped body, one end of which is connected to the fixed end of the conductive bridge (424), and the other end of which extends into the space between the water supply dial (421) and the drainage dial (422). At the end of the grouting stroke of the slurry piston rod (413) which reciprocates back and forth, the lever touches the water supply dial (421) and the drainage dial (422), is moved by the water supply dial (421) and the drainage dial (422), and drives the free end of the conductive bridge (424) to swing back and forth.

4. The energy-saving grouting system applicable to high-pressure water-rich formations according to claim 3, characterized in that, The improved energy-saving grouting machine (4) further comprises a water inlet and outlet module (43), wherein the water inlet and outlet module (43) comprises a housing, a water supply electromagnetic head (431), a water discharge electromagnetic head (432), an axial iron rod (433) and an isolation piston (434), wherein: The housing is arranged horizontally, and a magnetic chamber connected to the housing is arranged at both the front and rear ends; The water supply electromagnetic head (431) and the drainage electromagnetic head (432) are arranged in the magnetic chamber, one at each end, wherein the water supply electromagnetic head (431) is arranged in the magnetic chamber at the rear end, the water supply electromagnetic head (431) is connected between the conductive seat (425) at the rear end and the power supply, and the drainage electromagnetic head (432) is connected between the conductive seat (425) at the front end and the power supply; A high-pressure water inlet (435), a low-pressure water outlet (436) and a connecting water port (437) are provided on the shell; the high-pressure water inlet (435) and the low-pressure water outlet (436) are located on one side of the shell and are spaced apart along the length direction of the shell; the connecting water port (437) is provided on the opposite side of the shell and is located in the middle part between the high-pressure water inlet (435) and the low-pressure water outlet (436); the high-pressure water inlet (435) is connected to the high-pressure water pipeline, the low-pressure water outlet (436) is emptied, and the connecting water port (437) is connected to the pipeline of the high-pressure water bag (418); The axial iron rod (433) is horizontally arranged in the shell, and two groups of isolation pistons (434) are fixedly sleeved thereon at intervals. The two groups are respectively located at the front and rear ends of the axial iron rod (433), and each group consists of two isolation pistons (434) arranged at intervals. Each isolation piston (434) is tightly fitted with the inner wall of the shell. In the same group, two isolation pistons (434) and two adjacent isolation pistons (434) in two groups form a chamber with the shell respectively. Under the action of the electromagnetic force, the axial iron rod (433) can move forward and backward to close the low-pressure water outlet (436) so that the high-pressure water inlet (435) and the connecting water outlet (437) are connected, or close the high-pressure water inlet (435) so that the low-pressure water outlet (436) and the connecting water outlet (437) are connected.

5. The energy-saving grouting system applicable to high-pressure water-rich strata according to claim 4, characterized in that, The improved energy-saving grouting machine (4) further comprises a limiting sleeve (417), which is a cylindrical body with openings at both ends, and is coaxially sleeved inside the water pressure boosting sleeve (416) and the high-pressure water bag (418), and sleeved outside the slurry piston rod (413). The rear end of the limiting sleeve (417) is located outside the rear end of the water pressure boosting cylinder (415), and the front end thereof is not attached to the front end inside the water pressure boosting sleeve (416); the rear end thereof is threadedly connected to the water pressure boosting cylinder (415), and the outer wall of the rear end thereof is in the shape of a disc protruding outward, and is clamped and attached to the rear end outer wall of the water pressure boosting cylinder (415).

6. The energy-saving grouting system applicable to high-pressure water-rich strata according to claim 5, characterized in that, It also includes a water storage barrel (5), a pulping and stirring barrel (6) and a pulp storage barrel (7), wherein the water storage barrel (5) is connected to a pipeline communicating with the water inlet (437) and is used to receive and store the non-pressurized water in the high-pressure water chamber; The slurry-making stirring barrel (6) is connected to the water storage barrel (5) through a pipeline, and non-pressurized water is introduced into the slurry-making stirring barrel (6) for stirring and preparing the slurry; The slurry storage barrel (7) is connected to the slurry mixing barrel (6) through a pipeline, and is also connected to the slurry suction port pipeline, and is used to receive and store the stirred slurry and transport it to the slurry suction port.

7. The energy-saving grouting system applicable to high-pressure water-rich strata according to claim 6, characterized in that, The diameter of the front section of the water pressure boost sleeve (416) is the same as the inner diameter of the slurry piston cylinder (411), and the sum of the length of the front section and the thickness of the slurry piston (412) is the same as the length of the inner cavity of the slurry piston cylinder (411).

8. The energy-saving grouting system applicable to high-pressure water-rich formations according to claim 7, wherein, High-pressure water in the stratum is supplied by a water collection well (1), which is located in the tunnel and outside the grouting influence area and is excavated vertically downwards.

9. The construction method of an energy-saving grouting system applicable to high-pressure water-rich strata according to claim 8, characterized in that, The construction method is as follows: Step 1: dig a water collection well (1) vertically downward in the tunnel and outside the grouting influence area; Step 2: Connect the high-pressure water inlet (435) to the pipeline of the water collection well (1); prepare slurry in the stirring barrel (6) and transport it to the slurry storage barrel (7); Step 3: The motor drives the slurry piston rod (413), and at the same time, high-pressure water enters the high-pressure water bag (418) from the high-pressure water inlet (435), driving the slurry piston (412) to be located at the front end of the slurry piston cylinder (411), and the water capacity in the high-pressure water bag (418) reaches a maximum; then the drainage dial (422) toggles the lever (423), so that the drainage electromagnetic head (432) is energized, the high-pressure water inlet (435) is closed, and the low-pressure water outlet (436) is opened, so that the water in the high-pressure water bag (418) is disconnected from the high-pressure water in the water collection well (1), and becomes pressureless water; Step 4: The motor drives the slurry piston rod (413) to move backward, and drives the slurry piston (412) to move backward, so that negative pressure is formed in the slurry piston cylinder (411), and the slurry in the slurry storage barrel (7) is sucked into the slurry piston cylinder (411) through the slurry suction port. The slurry piston (412) pushes the water pressure boost sleeve (416) to move backward, squeezing the non-pressurized water in the high-pressure water bag (418), which flows through the connecting water port (437) and the low-pressure water outlet (436) and is discharged into the water storage barrel (5); During the slurry suction process, the drainage dial (422) is separated from the lever (423), and the conductive bridge (424) and the conductive seat (425) remain in contact and communication under the action of the magnet, so that the drainage electromagnetic head (432) is continuously energized, the high-pressure water inlet (435) is continuously in a closed state, and the low-pressure water outlet (436) is continuously in an open state, until the pressure-free water is completely discharged; Step 5: The water supply dial (421) contacts the lever (423), and the lever (423) is moved to energize the water supply electromagnetic head (431), open the high-pressure water inlet (435), and close the low-pressure water outlet (436); The high-pressure water bag (418) is connected to the high-pressure water in the water collection well (1). The high-pressure water continuously flows into the high-pressure water bag (418). The high-pressure water bag (418) continuously expands, pushing the water pressure boost sleeve (416) to move forward. The thrust is transmitted to the slurry piston (412) and the slurry piston rod (413). The slurry piston (412) moves forward, squeezes the slurry in the slurry piston cylinder (411), and injects the slurry into the borehole (9) through the slurry outlet. During the inflow of high-pressure water, the water supply dial (421) is separated from the lever (423), and the bridge (424) and the conductive seat (425) remain in contact and communication under the action of magnetic force, so that the water supply electromagnetic head (431) is continuously energized, the high-pressure water inlet (435) is continuously in an open state, and the low-pressure water outlet (436) is continuously in a closed state; Step 6: Repeat steps 4 to 5 to continuously inject grout into the borehole (9) until the total amount of grout injected into the grouting hole reaches the designed value.

10. The construction method of an energy-saving grouting system applicable to high-pressure water-rich strata according to claim 9, characterized in that, After step six, the method further includes: transporting the water in the water storage barrel (5) in sequence to clean the slurry stirring barrel (6), the slurry storage barrel (7) and the slurry piston cylinder (411).

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