Basement bottom plate post-cast strip construction joint leakage treatment method and device

Abstract

The invention discloses a basement bottom plate post-cast strip construction joint leakage treatment method and device. The method comprises the steps of determining the position of a leakage point, zoning and marking a close leakage point or a gap large leakage position, then chiseling a V-shaped notch in the length direction of leakage, placing an embedded grouting component with holes evenly formed in the periphery and with the two ends connected with a grouting pipe and an exhaust pipe, laying a gravel layer with the uniform particle size, mixing a proper amount of a high-performance expanding agent into the gravel layer, and conducting grouting. And a high-strength early-strength concrete protection layer is poured, and heavy objects are applied for reinforcement. Before grouting, a grouting pump is connected with a grouting pipe, relevant valves are opened, then pressure grouting is carried out until the grouting pipe is full, and a grouting material is a high-strength grouting material. Meanwhile, a prefabricated pressure grouting device is provided, and the repairing liquid is pushed through compressed air to conduct grouting. According to the method, the problems that a water leakage part needs to be accurately found and grouting needs to be conducted for multiple times in the prior art are solved, cracks at the whole leakage part can be blocked at a time, grout use is reduced, the structural strength and durability are improved, and treatment is more thorough.

Description

Technical Field

[0001] This invention belongs to the field of construction joint leakage control, and more specifically, relates to a method and device for controlling leakage at construction joints in post-cast strips of basement slabs. Background Technology

[0002] In recent years, many construction projects have incorporated basements or underground garages. As basement areas have grown larger, post-construction joints are typically designed to prevent stress shrinkage and cracking in the basement floor slab concrete. However, many of these post-construction joints experience leakage at the horizontal construction joints some time after pouring, with water seeping out of the floor slab. Although engineers implement preventative measures during the design phase, such as installing water-stop steel plates, water-expanding strips, and using high-strength, non-shrink concrete, the contact surface of the previously poured concrete at these joints often requires roughening and is difficult to clean, with cleaning often proving ineffective. Furthermore, the shrinkage properties of the post-construction concrete itself and issues with construction processes, including insufficient compaction during pouring and untimely concrete supply, can easily lead to cracks at the construction joints, resulting in leakage. Sealing leaks at construction joints is also a challenge, especially when large-area leakage occurs along the entire joint, requiring multiple repairs and observations to resolve the issue. Meanwhile, existing technologies lack intelligent and automated grouting methods, resulting in low efficiency and poor effectiveness. Existing drilling and grouting methods are primarily effective when construction joint leakage is minor and the leakage point is localized. This involves drilling at least one row of waterproof holes downwards from both sides of each construction joint; then drilling at least one row of grouting holes at an angle towards the construction joint from both sides; and finally injecting grout into the construction joint through these holes for water-stopping reinforcement. However, this method is not very effective, as it is affected by factors such as the horizontal spacing of the grouting holes, the drilling depth and angle, and the grouting pressure. It cannot guarantee that the grout will completely penetrate the leaking cracks, and the leakage control effect may be insignificant. This invention employs a new leakage control structure and construction method, offering better control and assurance, especially for long, straight construction joints that leak, resulting in a more thorough leakage control. Summary of the Invention

[0003] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides a method for treating leakage at construction joints in post-cast strips of basement floor slabs, comprising the following steps: Step 1: Determine the location of the leakage point and locate the leakage point at the construction joint of the post-pouring strip in the base slab; divide multiple similar leakage points or large leakage points within a post-pouring strip into one area; Step 2: Referring to the marked area, chisel out the concrete around the leakage point in the direction of the extension of the post-pouring strip to form a groove. Place the pre-made embedded grouting component into the groove. The front and rear ends of the embedded grouting component are respectively connected to the grouting pipe and the vent pipe. The grouting pipe and the vent pipe are equipped with grouting pipe valves and vent pipe valves. Step 3: Lay a layer of crushed stone. Smoothly lay a layer of crushed stone into the chiseled groove. Step 4: Pour a concrete protective layer. After the crushed stone layer is laid, pour a concrete protective layer on the outer surface of the crushed stone layer to expose the grouting pipe and the vent pipe. Step 5: Preparations before grouting: Connect the grouting pump to the grouting pipe, and open the grouting pipe valve and the vent pipe valve; Step 6: Pressure grouting. Based on the statistical model, optimize the grouting parameters; start the grouting pump and use the grouting components to perform pressure grouting into the trench until the gaps between the crushed stone layers in the trench are completely filled with grout, then close the grouting pipe valve. Step 7: Post-grouting treatment. After the grout has solidified for a period of time, cut off the entire portion of the grouting pipe and vent pipe above the bottom plate, clean up debris, and check the effectiveness of the construction joint leakage treatment.

[0004] Furthermore, the embedded grouting component in step two is a seamless steel pipe with uniformly spaced holes on all four sides.

[0005] Furthermore, the crushed stone layer laid in step three is composed of a mixture of crushed stone with multiple particle sizes, ranging from 10mm to 30mm. Specifically, it includes: crushed stone with a particle size of 10mm to 15mm accounting for 20% to 30% of the total weight, crushed stone with a particle size of 15mm to 20mm accounting for 30% to 40% of the total weight, crushed stone with a particle size of 20mm to 25mm accounting for 20% to 30% of the total weight, and crushed stone with a particle size of 25mm to 30mm accounting for 10% to 20% of the total weight.

[0006] Furthermore, the crushed stone material is high-strength granite or basalt, with a compressive strength of not less than 120 MPa and a water absorption rate of less than 0.5%.

[0007] Furthermore, an appropriate amount of high-performance expanding agent is incorporated into the crushed stone layer, with an amount of 0.5% to 1.5% of the total weight of the crushed stone.

[0008] Furthermore, one or more holes are provided on the concrete protective layer.

[0009] Furthermore, the pressure grouting method in step six includes: starting the grouting pump, performing pressure grouting into the V-shaped groove through the grouting pipe, and immediately closing the exhaust pipe valve when a stable grout overflow is observed from the exhaust pipe; continuing to pressurize and grout inward until the V-shaped groove and the gap between the crushed stone layers are completely filled with grout and a stable grout overflow is observed from the holes in the concrete protective layer, at which point the grouting pipe valve is closed.

[0010] Furthermore, the method for optimizing grouting parameters based on a statistical model includes the following steps: S1: Data Acquisition and Preprocessing: Real-time acquisition of pressure during the grouting process via sensors. and traffic Data; noise and outliers are removed from the collected data, and then normalization is performed. The specific formula is as follows: ; ; in, This is the normalized pressure value; Normalized flow and These are the minimum and maximum values ​​of the pressure data, respectively. and These are the minimum and maximum values ​​of the traffic data, respectively. This represents the real-time pressure value during the grouting process. This refers to the real-time flow rate during the grouting process. S2: Statistical Model Construction: Based on historical grouting data, a statistical model is constructed to predict the optimal grouting pressure and flow rate; the statistical model uses a multiple linear regression method, taking into account the porosity of the construction joint. and the properties of grouting materials Grouting pressure is the independent variable. and traffic As the dependent variable; the specific formula is as follows: ; ; in, and For model parameters, and For error terms, For optimal grouting pressure, To achieve the optimal grouting flow rate; S3: Parameter Adjustment and Feedback Control: Based on the prediction results of the statistical model, the operating parameters of the grouting pump are adjusted in real time; the specific adjustment formula is as follows: ; ; in, and This is the feedback control coefficient, used to adjust the response speed of grouting pressure and flow rate; The system monitors pressure and flow rate changes during the grouting process in real time. When an abnormality is detected, it automatically adjusts the grouting parameters or suspends grouting and issues an alarm to notify the operator. S4: Model Optimization and Iterative Updates: Regularly evaluate the prediction accuracy of the statistical model and adjust the model parameters according to the actual grouting effect; continuously update the statistical model based on new grouting data to improve the model's adaptability and accuracy.

[0011] Furthermore, the method for updating the statistical model is as follows: ; ; in, For learning rate, The number of samples for grouting data. and This refers to the pressure and flow rate data during the actual grouting process.

[0012] Furthermore, the present invention provides a device for treating leakage at construction joints of post-cast strips in basement slabs, used to implement the method for treating leakage at construction joints of post-cast strips in basement slabs as described in any one of claims 1-9, comprising: a grouting pump and a grouting pipe connected to the grouting pump, a grouting pipe valve for controlling the opening and closing of the grouting pipe being provided on the grouting pipe, one end of the grouting pipe being connected to an embedded grouting component, the other end of the embedded grouting component being connected to an exhaust pipe, and an exhaust pipe valve for controlling the opening and closing of the exhaust pipe being provided on the exhaust pipe.

[0013] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects: 1. The present invention provides a method for treating leakage at construction joints in post-cast strips of basement slabs. By dividing multiple similar leakage points or large leakage areas within a post-cast strip into a region, a V-shaped groove covering the entire region is chiseled out along the length of the leakage. An embedded grouting component is used to achieve full coverage grouting of the entire leakage joint. This avoids the drawbacks of traditional processes that require precise location of individual leakage points and multiple drilling and grouting operations. It achieves one-time sealing of the entire leakage crack, reduces the manpower and time costs of repeated construction, and provides a more comprehensive treatment range, reducing the risk of secondary leakage.

[0014] 2. This invention provides a method for treating leakage at construction joints in post-cast strips of basement slabs. This involves laying a layer of crushed stone composed of granite or basalt with multi-grade particle sizes of 10-30mm, and incorporating 0.5%-1.5% high-performance expanding agent. The multi-grade crushed stone forms a well-defined porous structure, facilitating uniform grout penetration. The expanding agent expands moderately during grouting, filling tiny gaps and enhancing the bond between the crushed stone layer and the construction joint. This improves the overall strength and durability of the structure, extending the service life after treatment.

[0015] 3. The present invention provides a method for treating leakage at construction joints of post-cast strips in basement slabs. By designing a grouting parameter adjustment method based on a statistical model, the grouting parameters are dynamically adjusted to ensure the uniformity and stability of the grouting process, improve grouting quality, reduce manual intervention, and improve construction efficiency and safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the treatment of leakage at construction joints in the post-cast strip of the basement floor slab according to an embodiment of the present invention. Figure 2 This is a plan view of the construction joint leakage treatment for the post-cast strip of the basement floor slab according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of the construction joint leakage treatment of the basement floor slab post-pouring strip according to an embodiment of the present invention: Figure 4 This is a longitudinal cross-sectional view of the construction joint leakage treatment of the post-cast strip in the basement floor slab according to an embodiment of the present invention; Figure 5 A schematic diagram of the embedded grouting component, grouting pipe, and vent pipe, as described in an embodiment of the present invention; Figure 6 A schematic diagram of a prefabricated embedded pressure grouting device is provided as an embodiment of the present invention. In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 101-concrete base slab, 102-post-cast strip, 103-post-cast strip construction joint, 104-V-groove, 105-crushed stone layer, 106-embedded grouting component, 107-concrete protective layer, 108-grouting pipe, 109-grouting pipe valve, 110-vent pipe, 111-vent pipe valve, 112-grouting pump, 113-prefabricated embedded pressure grouting device, 114-pressure cylinder, 115-piston, 116-grouting cylinder, 117-pressure plug. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0018] Example 1: Normal Grouting Please refer to Figure 1 A device for treating leakage at construction joints of post-cast strips in basement slabs, used to implement the method for treating leakage at construction joints of post-cast strips in basement slabs as described in Embodiment 1, includes: a grouting pump 112 and a grouting pipe 108 connected to the grouting pump 112, a grouting pipe valve 109 for controlling the opening and closing of the grouting pipe 108 is provided on the grouting pipe 108, one end of the grouting pipe 108 is connected to an embedded grouting component 106, the other end of the embedded grouting component 106 is connected to an exhaust pipe 110, and an exhaust pipe valve 111 for controlling the opening and closing of the exhaust pipe 110 is provided on the exhaust pipe 110.

[0019] Step 1: Locate the leakage point at the construction joint of the post-cast strip in the foundation slab based on the actual site conditions. If possible, group multiple nearby leakage points or large straight leakage areas along the post-cast strip into a single area, marking it with a line. The marked area should be slightly longer than the actual leakage area. Preferably, image recognition technology can be used to quickly determine the leakage point location.

[0020] Step Two: Chisel out a V-shaped groove 104 at the construction joint. Referring to the marked area, use a power tool to chisel out a V-shaped groove 104 along the length of the leakage direction of the construction joint in the post-cast strip 102. The length must be greater than and cover all leakage points in the construction joint, with an angle of 45° on both sides and a depth of approximately 50mm. The length must be greater than and cover all leakage points in the construction joint. During the V-shaped groove chiseling process, the original reinforcing steel in the base slab and post-cast strip must not be damaged.

[0021] Please refer to Figure 2 , Figure 3 , Figure 4 Clean the interfaces on both sides of the V-shaped groove 104 chiseled out at the construction joint. Clean the interfaces on both sides of the V-shaped groove along its length, removing surface laitance to expose the concrete aggregate, and thoroughly clean all dust and debris from the inside. Insert the pre-fabricated embedded grouting component 106 into the V-shaped groove.

[0022] Please refer to Figure 5 The embedded grouting component 106 is a seamless steel pipe with a diameter of approximately 32mm to 38mm. The seamless steel pipe has 3 to 4 holes with a diameter of 10mm evenly opened around its perimeter. The two ends of the pipe are connected to the grouting pipe and the venting pipe, respectively. The grouting pipe 108 and the venting pipe 110 are equipped with grouting pipe valve 109 and venting pipe valve 111.

[0023] For long-distance or complex leakage areas, an auxiliary grouting point is added every 1.5 to 2m along the length of the trench to avoid grouting dead zones caused by insufficient grouting pressure in one direction.

[0024] Step 3: Lay the crushed stone layer 105. Lay a layer of crushed stone 105 with uniform particle size into the cleaned V-shaped groove, making it as flat as possible.

[0025] The crushed stone layer is composed of a mixture of crushed stone of multiple particle sizes, ranging from 10mm to 30mm. Specifically, crushed stone with a particle size of 10mm to 15mm accounts for 20% to 30% of the total weight, crushed stone with a particle size of 15mm to 20mm accounts for 30% to 40% of the total weight, crushed stone with a particle size of 20mm to 25mm accounts for 20% to 30% of the total weight, and crushed stone with a particle size of 25mm to 30mm accounts for 10% to 20% of the total weight. The crushed stone material is high-strength granite or basalt, with a compressive strength of not less than 120MPa and a water absorption rate of less than 0.5%. By adopting a multi-sized crushed stone mix, a good gradation structure can be formed, increasing the porosity and permeability of the crushed stone layer, while ensuring the overall stability of the crushed stone layer. This allows the grouting material to penetrate more evenly to all parts of the construction joint, improving the effectiveness of leakage control and the durability of the structure.

[0026] The crushed stone layer also incorporates an appropriate amount of high-performance expanding agent, at a dosage of 0.5% to 1.5% of the total weight of the crushed stone. The expanding agent can generate moderate expansion during the grouting process, filling the tiny gaps between the crushed stone layer and the construction joint, further enhancing the tightness of the bond between the crushed stone layer and the construction joint, preventing leakage recurrence, while reducing the amount of grouting material used, lowering construction costs, and improving construction efficiency.

[0027] Step 4: Pour the concrete protective layer. After the crushed stone layer 105 is laid, pour a concrete protective layer 107 on the outer surface, exposing the grouting pipe 108 and the vent pipe 110; the concrete used is C40 early strength concrete, which needs to reach its strength as soon as possible before grouting.

[0028] In some preferred embodiments, one or more holes are provided in the concrete protective layer 107.

[0029] Step 5: Preparation before grouting. Connect the grouting pump 112 to the grouting pipe 108, and open the grouting pipe valve 109 and the vent pipe valve 111.

[0030] Preferably, the method further includes applying a weight to the concrete protective layer 107 to reinforce the concrete protective layer 107 and prevent the concrete protective layer from cracking or leaking during the grouting process.

[0031] Step Six: Pressure Grouting. Start the grouting pump 112 and perform pressure grouting into the V-groove 104 through the grouting pipe 106. When a stable flow of grout is observed overflowing from the vent pipe 110, immediately close the vent pipe valve. Continue to pressurize and grout until the V-groove and the gaps between the crushed stone layers are completely filled with grout. Immediately close the grouting pipe valve 109. The grouting material is C60 high-strength grout.

[0032] A filtration and recovery device is installed at the exhaust pipe outlet to filter the excess slurry through a 50-mesh filter.

[0033] Step 7: Post-grouting treatment. After the grout has solidified for a period of time, cut off the entire portion of the grouting pipe 108 and the vent pipe 110 above the bottom plate, clean up debris, and check the effectiveness of the construction joint leakage treatment.

[0034] Preferably, during the grouting process, sealing rings can be installed in the holes provided in the concrete protective layer 107, and air can be extracted. Then, pressure grouting can begin, and air extraction can continue until the groove 104 is filled with grout. This ensures that the gas in the groove is completely removed, improving the quality of the leak sealing treatment.

[0035] Example 2: Grouting of Embedded Precast Pressure Device Please refer to Figure 6 An embedded prefabricated pressure grouting device is used to implement the method for treating leakage at construction joints of post-cast strips in basement slabs in Example 2. The prefabricated embedded pressure grouting device is cylindrical in shape and includes a central pressure cylinder 114, two pistons 115, grouting cylinders 116, and pressure plugs 117 on either side. The pressure cylinder 114 and the grouting cylinder 116 are separated by the pistons 115. The pressure cylinder 114 is filled with compressed air, and the grouting cylinder 116 is filled with repair fluid. When the pressure plugs 117 are opened, the pistons 115 push the repair fluid in the grouting cylinder 116 to perform grouting. Step 1: Locate the leakage point at the construction joint of the post-cast strip in the foundation slab based on the actual site conditions. If possible, group multiple similar leakage points or large straight leakage areas along the post-cast strip into a single area, mark it with a line, and make the marked area slightly longer than the actual leakage area.

[0036] Step 2: Chisel out a V-shaped groove at the construction joint. Referring to the marked area, use a power tool to chisel out a V-shaped groove 104 along the length of the leakage direction of the construction joint in the post-cast strip 102. The length must be greater than and cover all leakage points in the construction joint. The angle on both sides can be 45°, and the depth should be approximately 50mm. The length must be greater than and cover all leakage points in the construction joint. During the V-shaped groove chiseling process, the original reinforcing steel in the base slab and post-cast strip must not be damaged.

[0037] Clean the interfaces on both sides of the V-shaped groove 104 chiseled out at the construction joint. Clean the interfaces on both sides of the V-shaped groove along its length, removing surface laitance to expose the concrete aggregate, and thoroughly clean all dust and debris from the inside. Insert the prefabricated embedded pressure grouting device 113 into the V-shaped groove, and connect a pull rope to the pressure plug 117 of the prefabricated embedded pressure grouting device 113. Depending on the depth and length of the V-shaped groove, one or more grouting devices 113 can be inserted.

[0038] Step 3: Lay the crushed stone layer 105. Lay a layer of crushed stone 105 with uniform particle size into the cleaned V-shaped groove, making it as flat as possible.

[0039] The crushed stone layer is composed of a mixture of crushed stone of multiple particle sizes, ranging from 10mm to 30mm. Specifically, crushed stone with a particle size of 10mm to 15mm accounts for 20% to 30% of the total weight, crushed stone with a particle size of 15mm to 20mm accounts for 30% to 40% of the total weight, crushed stone with a particle size of 20mm to 25mm accounts for 20% to 30% of the total weight, and crushed stone with a particle size of 25mm to 30mm accounts for 10% to 20% of the total weight. The crushed stone material is high-strength granite or basalt, with a compressive strength of not less than 120MPa and a water absorption rate of less than 0.5%. By adopting a multi-sized crushed stone mix, a good gradation structure can be formed, increasing the porosity and permeability of the crushed stone layer, while ensuring the overall stability of the crushed stone layer. This allows the grouting material to penetrate more evenly to all parts of the construction joint, improving the effectiveness of leakage control and the durability of the structure.

[0040] The crushed stone layer also incorporates an appropriate amount of high-performance expanding agent, at a dosage of 0.5% to 1.5% of the total weight of the crushed stone. The expanding agent can generate moderate expansion during the grouting process, filling the tiny gaps between the crushed stone layer and the construction joint, further enhancing the tightness of the bond between the crushed stone layer and the construction joint, preventing leakage recurrence, while reducing the amount of grouting material used, lowering construction costs, and improving construction efficiency.

[0041] Step 4: Pour the concrete protective layer. After the crushed stone layer 105 is laid, pour a concrete protective layer 107 on the outer surface and tie ropes. High-strength, early-strength concrete should be used, and grouting should be carried out after it reaches the required strength as soon as possible.

[0042] Step 5: Preparation before grouting. Preferably, this also includes applying a weight to the concrete protective layer 107 to reinforce it and prevent cracking or leakage during the grouting process.

[0043] Step 6: Pull the rope to start the prefabricated embedded pressure grouting device 113. The internal pressure of the prefabricated embedded pressure grouting device 113 will push the repair liquid to perform grouting. The grouting material is C60 high-strength grout, or it can be polyurethane foam.

[0044] The pressure plug 117 is a mechanical snap-fit ​​pressure plug: made of hard plastic or metal, cylindrical in shape, and tightly connected to the outlet of the grouting cylinder 116 via a snap-fit ​​structure. A rubber sealing ring is provided at the snap-fit ​​to ensure sealing. In use, the snap-fit ​​is unlocked by pulling the rope, and the pressure plug 117 disengages from the outlet of the grouting cylinder, allowing compressed air to push the piston to begin grouting. When not pulled, the snap-fit ​​engages the pressure plug to achieve a seal; pulling the rope releases the snap-fit, and the pressure plug 117 is pushed out by the internal pressure.

[0045] To address the issue of uneven grouting that may result from insufficient grouting ports in embedded precast pressure devices, an embedded grouting component 106 can be connected to the pressure plug 117 at the corresponding grout outlet to extend the grouting distance and range.

[0046] Step 7: Post-grouting treatment. After the repair fluid has solidified for a period of time, remove the exposed ignition device, clean up debris, and check the effectiveness of the construction joint leakage treatment to observe whether there is any leakage. If local leakage is still found, promptly perform regrouting to ensure that the leakage treatment of the construction joint of the post-cast strip of the base slab achieves the expected results.

[0047] Example 3: This example 3 also provides a method for adjusting grouting parameters based on a statistical model, including the following steps: S1: Data Acquisition and Preprocessing: Real-time acquisition of pressure during the grouting process via sensors. and traffic Data; noise and outliers are removed from the collected data, and then normalization is performed. The specific formula is as follows: ; ; in, This is the normalized pressure value; Normalized flow and These are the minimum and maximum values ​​of the pressure data, respectively. and These are the minimum and maximum values ​​of the traffic data, respectively. This represents the real-time pressure value during the grouting process. This refers to the real-time flow rate during the grouting process. S2: Statistical Model Construction: Based on historical grouting data, a statistical model is constructed to predict the optimal grouting pressure and flow rate; the statistical model uses a multiple linear regression method, taking into account the porosity of the construction joint. and the properties of grouting materials Grouting pressure is the independent variable. and traffic As the dependent variable; the specific formula is as follows: ; ; in, and For model parameters, and For error terms, For optimal grouting pressure, To achieve the optimal grouting flow rate; S3: Parameter Adjustment and Feedback Control: Based on the prediction results of the statistical model, the operating parameters of the grouting pump are adjusted in real time; the specific adjustment formula is as follows: ; ; in, and This is the feedback control coefficient, used to adjust the response speed of grouting pressure and flow rate; The system monitors pressure and flow rate changes during the grouting process in real time. When an abnormality is detected, it automatically adjusts the grouting parameters or suspends grouting and issues an alarm to notify the operator. S4: Model optimization and iterative updates: Regularly evaluate the prediction accuracy of the statistical model and adjust the model parameters according to the actual grouting effect; The statistical model is continuously updated based on new grouting data to improve its adaptability and accuracy; the specific update formula is as follows: ; ; in, For learning rate, The number of samples for grouting data. and This provides pressure and flow rate data for the actual grouting process. Through the above method, this invention enables dynamic adjustment of grouting parameters, ensuring the uniformity and stability of the grouting process, improving grouting quality, reducing manual intervention, and enhancing construction efficiency and safety.

[0048] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for treating leakage at construction joints in post-cast strips of basement floor slabs, characterized in that, Includes the following steps: Step 1: Determine the location of the leakage point and locate the leakage point at the construction joint of the post-pouring strip in the base slab; divide multiple similar leakage points or large leakage points within a post-pouring strip into one area; Step 2: Referring to the marked area, chisel out the concrete around the leakage point in the extension direction of the post-cast strip (102) to form a groove (104). Place the pre-made embedded grouting component (106) into the groove (104). The front and rear ends of the embedded grouting component (106) are respectively connected to the grouting pipe (108) and the exhaust pipe (110). The grouting pipe (108) and the exhaust pipe (110) are equipped with grouting pipe valve (109) and exhaust pipe valve (111). Step 3: Lay a layer of crushed stone (105), and lay the crushed stone layer (105) evenly into the chiseled groove (104). Step 4: Pour concrete protective layer. After the crushed stone layer (105) is laid, pour a concrete protective layer (107) on the outer surface of the crushed stone layer (105) and expose the grouting pipe (108) and the vent pipe (110). Step 5: Preparation before grouting. Connect the grouting pump (112) to the grouting pipe (108), and open the grouting pipe valve (109) and the exhaust pipe valve (111). Step 6: Pressure grouting. Based on the statistical model, optimize the grouting parameters; start the grouting pump (112) and perform pressure grouting into the groove (104) through the grouting component (106) until the gaps between the crushed stone layers in the groove (104) are completely filled with grout, then close the grouting pipe valve (109). Step 7: Post-grouting treatment. After the grout has solidified for a period of time, cut off the part above the bottom plate of the grouting pipe (108) and the exhaust pipe (110), clean up the debris and check the effect of the construction joint leakage treatment.

2. The method for treating leakage at construction joints of post-cast strips in basement slabs according to claim 1, characterized in that, In step two, the embedded grouting component (106) is a seamless steel pipe with uniform openings on all four sides.

3. The method for treating leakage at construction joints in post-cast strips of basement floor slabs according to claim 1, characterized in that, The crushed stone layer laid in step three is composed of a mixture of crushed stone of multiple particle sizes, ranging from 10mm to 30mm. Specifically, it includes: crushed stone with a particle size of 10mm to 15mm accounting for 20% to 30% of the total weight, crushed stone with a particle size of 15mm to 20mm accounting for 30% to 40% of the total weight, crushed stone with a particle size of 20mm to 25mm accounting for 20% to 30% of the total weight, and crushed stone with a particle size of 25mm to 30mm accounting for 10% to 20% of the total weight.

4. The method for treating leakage at construction joints of post-cast strips in basement slabs according to claim 1, characterized in that, The crushed stone is made of high-strength granite or basalt, with a compressive strength of not less than 120 MPa and a water absorption rate of less than 0.5%.

5. The method for treating leakage at construction joints of post-cast strips in basement slabs according to claim 1, characterized in that, The crushed stone layer contains an appropriate amount of high-performance expanding agent, with an addition amount of 0.5% to 1.5% of the total weight of the crushed stone.

6. The method for treating leakage at construction joints of post-cast strips in basement slabs according to claim 1, characterized in that, One or more holes are provided on the concrete protective layer (107).

7. A method for treating leakage at construction joints in post-cast strips of basement floor slabs according to any one of claims 1-7, characterized in that, The pressure grouting method in step six includes: starting the grouting pump (112), performing pressure grouting into the V-groove (104) through the grouting pipe (108), and immediately closing the vent pipe valve when a stable grout overflow is found in the vent pipe (110); continuing to pressurize and grout inward until the V-groove and the gap between the crushed stone layers are completely filled with grout and a stable grout overflow is found in the holes on the concrete protective layer (107), and then closing the grouting pipe valve (109).

8. A method for treating leakage at construction joints in post-cast strips of basement floor slabs according to any one of claims 1-7, characterized in that, The method for optimizing grouting parameters based on a statistical model includes the following steps: S1: Data Acquisition and Preprocessing: Real-time acquisition of pressure during the grouting process via sensors. and traffic Data; noise and outliers are removed from the collected data, and then normalization is performed. The specific formula is as follows: ； ； in, This is the normalized pressure value; Normalized flow and These are the minimum and maximum values ​​of the pressure data, respectively. and These are the minimum and maximum values ​​of the traffic data, respectively. This represents the real-time pressure value during the grouting process. This refers to the real-time flow rate during the grouting process. S2: Statistical Model Construction: Based on historical grouting data, a statistical model is constructed to predict the optimal grouting pressure and flow rate; the statistical model uses a multiple linear regression method, taking into account the porosity of the construction joint. and the properties of grouting materials Grouting pressure is the independent variable. and traffic As the dependent variable; the specific formula is as follows: ； ； in, and For model parameters, and For error terms, For optimal grouting pressure, To achieve the optimal grouting flow rate; S3: Parameter Adjustment and Feedback Control: Based on the prediction results of the statistical model, the operating parameters of the grouting pump are adjusted in real time; the specific adjustment formula is as follows: ； ； in, and This is the feedback control coefficient, used to adjust the response speed of grouting pressure and flow rate; The system monitors pressure and flow rate changes during the grouting process in real time. When an abnormality is detected, it automatically adjusts the grouting parameters or suspends grouting and issues an alarm to notify the operator. S4: Model Optimization and Iterative Updates: Regularly evaluate the prediction accuracy of the statistical model and adjust the model parameters according to the actual grouting effect; continuously update the statistical model based on new grouting data to improve the model's adaptability and accuracy.

9. A method for treating leakage at construction joints in post-cast strips of basement floor slabs according to claim 9, characterized in that, The method for updating the statistical model is as follows: ； ； in, For learning rate, The number of samples for grouting data. and This refers to the pressure and flow rate data during the actual grouting process.

10. A device for treating leakage at construction joints in post-cast strips of basement floor slabs, characterized in that, The method for treating leakage at construction joints of post-cast strips in basement slabs as described in any one of claims 1-9 includes: a grouting pump (112) and a grouting pipe (108) connected to the grouting pump (112), wherein a grouting pipe valve (109) for controlling the opening and closing of the grouting pipe (108) is provided on the grouting pipe (108), one end of the grouting pipe (108) is connected to an embedded grouting component (106), the other end of the embedded grouting component (106) is connected to an exhaust pipe (110), and an exhaust pipe valve (111) for controlling the opening and closing of the exhaust pipe (110) is provided on the exhaust pipe (110).

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