Pre-sealing advanced water stop grouting device and method

Abstract

The invention relates to the technical field of settlement post-cast strips, in particular to a pre-closed advanced water stop grouting device and method.The pre-closed advanced water stop grouting device comprises a basement top plate, a bottom plate, a cover plate and a grouting sleeve and further comprises a self-adaptive adjusting assembly; the self-adaptive adjusting assembly comprises an inner cylinder, an outer cylinder, a spring, a sealing ring and a pre-tightening force adjusting component, and when the building body settles, the cover plate descends to drive the outer cylinder to descend, and then the spring is extruded; the springs on the two sides generate reverse buffering force after being compressed, the force is transmitted to the cover plate through the outer cylinder, the internal stress of the cover plate caused by differential settlement is effectively counteracted, and it is avoided that a sealing structure at the joint of the cover plate and a basement top plate cracks due to rigid pulling; and after the settlement is stable, pressure grouting is performed through the grouting sleeve, so that the problems of cracking of the cover plate and failure of sealing structures such as a sealant and a waterproof coiled material due to rigid pulling are solved.

Description

Technical Field

[0001] This invention relates to the field of post-settlement grouting technology, and in particular to a pre-sealed advanced water-stopping grouting device and method. Background Technology

[0002] With urban development, more and more high-rise buildings in China have basements connected to the main building. Due to the difference in settlement, a settlement strip is usually designed at the connection between the main building and the basement. The settlement strip can only be closed after the main structure of the building is capped and the settlement is stable, which has a significant impact on the construction period and site layout. At the same time, because the settlement strip cannot be closed for a long time, rainwater from the roof slab flows into the basement, which affects the construction of both the exterior and the basement.

[0003] Existing technology CN115787738 A discloses a pre-sealing and advanced water-stopping grouting device for the post-settlement concrete strip of a basement roof slab, comprising: a primary waterproof layer, including a plain concrete curb and a water-stopping steel plate, wherein the extended end of the water-stopping steel plate is provided with an upwardly bent water-retaining edge to prevent rainwater from entering below the post-settlement concrete strip; and a secondary waterproof layer, including a precast concrete slab, a cast steel pipe, and a water-stopping ring. By setting up a two-layer waterproof structure, not only is the waterproof performance of the post-settlement concrete strip effectively improved, but also the integrally formed plain concrete curb in the primary waterproof layer eliminates the need for separate construction of the basement roof slab concrete layer and the plain concrete curb, reducing curing time and improving work efficiency; the cast steel pipe in the secondary waterproof layer provides an effective solution for the subsequent pouring construction steps of the post-settlement concrete strip.

[0004] The aforementioned device can prevent rainwater from flowing from the roof slab into the basement, thus affecting the construction of both the exterior and the basement. However, the precast concrete slab lacks adaptive settlement adjustment, making it prone to cracking and leakage due to differential settlement. Summary of the Invention

[0005] The purpose of this invention is to provide a pre-sealed advanced water-stopping grouting device and method, which solves the problem that existing pre-sealed advanced water-stopping grouting devices for basement roof slabs after settlement have no adaptive settlement adjustment for precast concrete slabs, and are prone to cracking and leakage due to differential settlement.

[0006] To achieve the above objectives, the present invention provides a pre-sealed advanced water-stopping grouting device, comprising a basement roof slab, a bottom slab, a cover plate, and a grouting sleeve. The bottom slab is disposed below the basement roof slab, the cover plate is disposed on the side of the basement roof slab away from the bottom slab, and the grouting sleeve is disposed on the cover plate. The device also includes an adaptive adjustment component. The adaptive adjustment component includes an inner cylinder, an outer cylinder, a spring, a sealing ring, and a pre-tightening force adjusting member. The inner cylinder is fixedly connected to the basement roof slab and located on the side of the basement roof slab closest to the cover plate. The outer cylinder is fixedly connected to the cover plate and slidably connected to the inner cylinder, and is sleeved on the inner cylinder. The sealing ring is fixedly connected to the inner cylinder and contacts the inner wall of the outer cylinder, and is sleeved on the inner cylinder. The pre-tightening force adjusting member is disposed on the outer cylinder. The two ends of the spring are respectively connected to the inner cylinder and the pre-tightening force adjusting member, and the spring is located inside the outer cylinder.

[0007] The basement roof slab has a positioning groove, which is located on the side of the basement roof slab near the cover plate; the cover plate has a positioning protrusion, which is located on the side of the cover plate near the positioning groove and extends into the positioning groove.

[0008] The preload adjusting component includes a threaded rod and a movable plate. The threaded rod is threadedly connected to the outer cylinder and passes through the outer cylinder. The movable plate is rotatably connected to the threaded rod, slidably connected to the outer cylinder, and connected to the spring.

[0009] The preload adjusting component further includes a limiting strip, which is fixedly connected to the outer cylinder and located inside the outer cylinder; the moving plate has a limiting groove, which cooperates with the limiting strip.

[0010] The pre-sealed advanced water-stopping grouting device also includes a water-stopping steel plate, which is fixedly connected to the basement roof slab and installed on the side wall of the basement roof slab.

[0011] The base plate is made of transparent acrylic sheet with a thickness of ≥18mm.

[0012] On the other hand, the present invention also includes a pre-sealing advanced water-stopping grouting method, comprising the following steps: The inner cylinder is installed to the basement roof slab, the outer cylinder is installed to the cover plate, the outer cylinder is fitted onto the inner cylinder, and the spring is compressed by the pre-tightening force adjustment component. Two-component polyurethane sealant was filled between the cover plate and the basement roof slab, then waterproof membrane was laid, and the water-stop steel plate and transparent base plate were fixed. The system acquires real-time data from the pull rope displacement sensor to monitor the sliding amount of the inner and outer cylinders. If the spring approaches its elastic limit, the threaded rod is rotated in the opposite direction to release the pressure. When the sliding amount is ≤0.01mm / d for 7 consecutive days, inject grout through the grouting sleeve and observe the transparent bottom plate to confirm that the grout is dense; The grouting material is cured, and the quality of the post-cast strip is observed regularly through a transparent base plate.

[0013] This invention discloses a pre-sealed advanced water-stopping grouting device and method. When the main building settles, the basement roof slab on the main building side, due to its large load and high rigidity, moves significantly downward with the main building, causing the fixed cover plate to move downward synchronously. Meanwhile, the basement roof slab on the basement side settles less, and its inner cylinder remains relatively fixed. At this time, the downward movement of the cover plate forces the outer cylinder on the main building side to slide downward relative to the inner cylinder on the main building side, compressing the spring on that side. Simultaneously, the movement of the cover plate also causes the outer cylinder on the basement side to slide downward relative to the almost stationary inner cylinder on the basement side, compressing the spring on that side. The springs on both sides generate a reverse buffer force after being compressed. This force is transmitted to the cover plate through the outer cylinder, effectively offsetting the internal stress of the cover plate caused by uneven settlement and preventing the sealing structure at the connection between the cover plate and the basement roof slab from cracking due to rigid tension. At the same time, during the relative sliding process of the inner and outer cylinders, the sealing ring fixed on the inner cylinder relies on its elastic deformation to maintain close contact with the inner wall of the outer cylinder, achieving dynamic sealing and preventing water infiltration. After the settlement stabilizes, pressure grouting is performed through the grouting sleeve, thereby preventing the cover plate from cracking and the sealing structure such as sealant and waterproof membrane from failing due to rigid tension. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall structure of the pre-sealed advanced water-stopping grouting device according to the first embodiment of the present invention.

[0016] Figure 2 This is the first embodiment of the present invention. Figure 1 Enlarged view of point A.

[0017] Figure 3 This is a schematic diagram of the installation structure of the limiting strip according to the first embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the detection component according to the second embodiment of the present invention.

[0019] Figure 5 This is a flowchart of the pre-sealing advanced water-stopping grouting method of the present invention.

[0020] In the diagram: 101-Basement roof slab, 102-Bottom slab, 103-Cover plate, 104-Grouting sleeve, 105-Adaptive adjustment component, 106-Inner cylinder, 107-Outer cylinder, 108-Spring, 109-Sealing ring, 110-Preload adjustment component, 111-Positioning groove, 112-Positioning protrusion, 113-Threaded rod, 114-Moving plate, 115-Limiting strip, 116-Limiting groove, 117-Waterstop steel plate, 201-Positioning column, 202-Detection component, 203-Outer shell, 204-Pull rope displacement sensor, 205-Connecting rod. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] First embodiment: Please see Figures 1 to 3 ,in Figure 1 This is a schematic diagram of the overall structure of the pre-sealed advanced water-stopping grouting device. Figure 2 yes Figure 1 Enlarged view of point A, Figure 3 This is a schematic diagram of the installation structure of the limit strip.

[0023] This invention provides a pre-sealed advanced water-stopping grouting device and method, including a basement roof slab 101, a bottom slab 102, a cover plate 103, a grouting sleeve 104, an adaptive adjustment component 105, and a water-stopping steel plate 117. The adaptive adjustment component 105 includes an inner cylinder 106, an outer cylinder 107, a spring 108, a sealing ring 109, and a pre-tightening force adjustment component 110. The basement roof slab 101 has a positioning groove 111, and the cover plate 103 has a positioning protrusion 112. The pre-tightening force adjustment component 110 includes a threaded rod 113 and a moving plate 114. The pre-tightening force adjustment component 110 also includes a limiting strip 115. The reverse buffering force generated by the compression of the spring 108 prevents the sealing connection between the cover plate 103 and the basement roof slab 101 from cracking. It can be understood that the aforementioned solution can be used to improve the connection stability between the cover plate 103 and the roof slab, and can also be used to detect the relative displacement between the outer cylinder 107 and the inner cylinder 106.

[0024] In this specific embodiment, the base plate 102 is located below the basement roof slab 101, the cover plate 103 is located on the side of the basement roof slab 101 away from the base plate 102, the grouting sleeve 104 is located on the cover plate 103, and a two-component polyurethane sealant is provided between the cover plate 103 and the basement roof slab 101. The bottom of the sealant is tightly attached to the basement roof slab 101, and the top is bonded to the cover plate 103. After curing, it forms an elastic sealing strip. Waterproof membrane is also laid on the cover plate 103, the basement roof slab 101, and the grouting sleeve 104 to prevent rainwater from seeping in from the edge gap between the cover plate 103 and the basement roof slab 101.

[0025] The inner cylinder 106 is fixedly connected to the basement roof slab 101 and located on the side of the basement roof slab 101 near the cover plate 103. The outer cylinder 107 is fixedly connected to the cover plate 103 and slidably connected to the inner cylinder 106, and is sleeved on the inner cylinder 106. The sealing ring 109 is fixedly connected to the inner cylinder 106, contacts the inner wall of the outer cylinder 107, and is sleeved on the inner cylinder 106. The preload adjustment component 110 is disposed on the outer cylinder 107. The two ends of the spring 108 are respectively connected to the inner cylinder 106 and the preload adjustment component 110, and the spring 108 is located inside the outer cylinder 107. Two adaptive adjustment components 105 are provided and are respectively located on the basement roof slab 101 on both sides. The basement roof slab 101 has a groove that mates with the inner cylinder 106, and the inner cylinder 106 is embedded in the groove on the basement roof slab 101. The cover plate 103 has a groove that mates with the outer cylinder 107, and the outer cylinder 107 is embedded in the groove on the cover plate 103. During installation, the inner cylinder 106 is first fixedly connected to the basement roof slab 101; the outer cylinder 107 is fixedly connected to the cover plate 103; and then the outer cylinder 107 is fitted onto the outside of the inner cylinder 106. At this time, the spring 108 between the inner cylinder 106 and the outer cylinder 107 is in an initial compressed state, storing elastic force for subsequent settlement buffering. At the same time, the space between the cover plate 103 and the basement roof slab 101 is filled with two-component polyurethane sealant, and a waterproof membrane is laid to form static waterproofing on the surface.

[0026] When the main building settles, the basement roof slab 101 on the main building side, due to its large load and high rigidity, moves down significantly with the main building, causing the fixed cover plate 103 to move down synchronously. Meanwhile, the basement roof slab 101 on the basement side settles less, and its inner cylinder 106 remains relatively fixed. At this time, the downward movement of the cover plate 103 forces the outer cylinder 107 on the main building side to slide downward relative to the inner cylinder 106, compressing the spring 108 on that side. Simultaneously, the movement of the cover plate 103 also causes the outer cylinder 107 on the basement side to slide downward relative to the almost stationary inner cylinder 106, compressing the spring 108 on that side. Thus, both springs 108 are compressed. This generates a reverse buffer force, which is transmitted to the cover plate 103 through the outer cylinder 107. This effectively counteracts the internal stress of the cover plate 103 caused by uneven settlement, preventing the sealing structure at the connection between the cover plate 103 and the basement roof slab 101 from cracking due to rigid tension. Simultaneously, during the relative sliding process of the inner and outer cylinders 107, the sealing ring 109 fixed on the inner cylinder 106 maintains close contact with the inner wall of the outer cylinder 107 due to its elastic deformation, achieving dynamic sealing and preventing water infiltration. After the settlement stabilizes, pressure grouting is performed through the grouting sleeve 104, thereby preventing the cover plate 103 from cracking and the sealing structure such as sealant and waterproof membrane from failing due to rigid tension.

[0027] Secondly, the positioning groove 111 is provided on the side of the basement roof slab 101 near the cover plate 103; the cover plate 103 has a positioning protrusion 112, which is provided on the side of the cover plate 103 near the positioning groove 111 and extends into the positioning groove 111; the positioning protrusion 112 extending into the positioning groove 111 provides guidance for the settlement of the cover plate 103, avoids the cover plate 103 from lateral displacement due to uneven settlement, and ensures that the outer cylinder 107 on the main building side and the basement side always slides coaxially with the inner cylinder 106, preventing the inner and outer cylinders 107 from being relatively stuck and affecting the compression and buffering effect of the spring 108.

[0028] Meanwhile, the threaded rod 113 is threadedly connected to the outer cylinder 107 and passes through the outer cylinder 107; the moving plate 114 is rotatably connected to the threaded rod 113 and slidably connected to the outer cylinder 107, and is connected to the spring 108; the top of the threaded rod 113 is provided with an internal hexagonal groove, which allows the operator to rotate the threaded rod 113 with tools. By rotating the threaded rod 113, the moving plate 114 is driven to rise and fall, thereby compressing or releasing the spring 108 to ensure that it has sufficient elastic buffering force. During the settling process, if the compression of the spring 108 is detected to be close to the elastic limit, the threaded rod 113 can be rotated in the opposite direction to release some pressure, so as to avoid permanent deformation of the spring 108 due to overcompression; after the settling is stable, the threaded rod 113 is rotated in the forward direction to keep the spring 108 at a compression of 20-25mm, ensuring that the spring 108 can buffer the cover plate 103.

[0029] In addition, the limiting strip 115 is fixedly connected to the outer cylinder 107 and is located inside the outer cylinder 107; the moving plate 114 has a limiting groove 116, which cooperates with the limiting strip 115; there are two limiting strips 115 and two limiting grooves 116, which are respectively located on both sides of the moving plate 114. The limiting strip 115 extends into the inner side of the limiting groove 116, and the lifting and lowering of the moving plate 114 is limited by the limiting strip 115, so that the moving plate 114 can only move vertically along the length direction of the limiting strip 115.

[0030] Then, the water-stop steel plate 117 is fixedly connected to the basement roof slab 101 and is installed on the side wall of the basement roof slab 101; the water-stop steel plate 117 is used to reduce the potential leakage between the old and new concrete at the connection of the post-cast strip of the roof slab, and its thickness is ≥3mm.

[0031] Finally, the base plate 102 is made of transparent acrylic sheet with a thickness of ≥18mm; the use of transparent templates allows for real-time observation of the later pouring quality of the post-pouring strip, and the thickness of ≥18mm ensures that it has sufficient strength and rigidity.

[0032] Second embodiment: Based on the first embodiment, please refer to Figure 4 , Figure 4 This is a schematic diagram of the detection component in the second embodiment. The adaptive adjustment component 105 in this embodiment also includes a positioning post 201 and a detection component 202. The detection component 202 includes a housing 203, a pull rope displacement sensor 204, and a connecting rod 205.

[0033] In this specific embodiment, the positioning post 201 is fixedly connected to the inner cylinder 106 and is located on the side of the inner cylinder 106 close to the spring 108. The positioning post 201 extends into the inner side of the spring 108 and positions the spring 108 to prevent the spring 108 from shifting laterally or tilting during compression or rebound.

[0034] The outer shell 203 is fixedly connected to the outer cylinder 107 and located on one side of the outer cylinder 107; the pull rope sensor is fixedly connected to the outer shell 203 and located inside the outer shell 203; the connecting rod 205 is fixedly connected to the inner cylinder 106 and connected to the outer shell 203, and connected to the pull rope of the tension sensor; the connecting rod 205 slides vertically along the guide hole opened in the outer shell 203 to ensure that the extension and retraction direction of the pull rope is consistent with the relative sliding direction of the inner and outer cylinders 107; when the building settlement causes the outer cylinder 107 to slide relative to the inner cylinder 106, the outer shell 203 moves synchronously with the outer cylinder 107, the connecting rod 205 slides relative to the outer shell 203, and the pull rope displacement sensor 204 detects the sliding data through the extension and retraction of the pull rope and transmits the data to the remote monitoring system; this facilitates the determination of whether the settlement is stable and also facilitates the determination of the elastic limit of the spring 108.

[0035] When using the pre-sealed advanced water-stopping grouting device of the present invention, the device is set at the post-pouring strip, and the spring 108 is in a compressed state, the rope displacement sensor 204 is zeroed, and at the same time, it is checked that the two-component polyurethane sealant is free of bubbles, the waterproof membrane is laid flat, and the transparent acrylic base plate 102 is undamaged. During the settlement of the main building, the data of the detection component 202 is obtained in real time through the remote monitoring system. The rope displacement sensor 204 will dynamically feed back the sliding amount of the outer cylinders 107 on both sides relative to the inner cylinder 106. The staff can judge the settlement distribution by the data difference. When the settlement is stable, the grouting process is carried out. The self-compacting micro-expansion grout is injected through the grouting sleeve 104. After the transparent acrylic base plate 102 observes that the grout is evenly filled in the gap of the post-pouring strip and that the grout overflows from the vent hole without bubbles, the pressure is stabilized for 3 minutes and the grouting valve is closed.

[0036] On the other hand, please see Figure 5 , Figure 5 This is a flowchart of the pre-sealing advanced water-stopping grouting method of the present invention.

[0037] The present invention also includes a pre-sealing advanced water-stopping grouting method, comprising the following steps: S1: Install the inner cylinder to the basement roof slab, install the outer cylinder to the cover plate, and fit the outer cylinder onto the inner cylinder. Use the pre-tightening force adjustment component to keep the spring in a compressed state. S2: Fill the space between the cover plate and the basement roof slab with two-component polyurethane sealant, then lay the waterproof membrane and fix the water-stop steel plate and the transparent base plate. S3: Real-time acquisition of data from the pull rope displacement sensor to monitor the sliding amount of the inner and outer cylinders. If the spring approaches its elastic limit, the threaded rod is rotated in the opposite direction to release the pressure. S4: When the sliding amount is ≤0.01mm / d for 7 consecutive days, inject grout through the grouting sleeve and observe the transparent bottom plate to confirm that the grout is dense; S5: Curing of the grouting material and regular observation of the quality of the post-cast strip through a transparent base plate.

[0038] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. A pre-sealed advanced water-stopping grouting device, comprising a basement roof slab, a bottom slab, a cover plate, and a grouting sleeve, wherein the bottom slab is disposed below the basement roof slab, the cover plate is disposed on the side of the basement roof slab away from the bottom slab, and the grouting sleeve is disposed on the cover plate, characterized in that, It also includes adaptive adjustment components; The adaptive adjustment component includes an inner cylinder, an outer cylinder, a spring, a sealing ring, and a preload adjustment component. The inner cylinder is fixedly connected to the basement roof slab and located on the side of the basement roof slab closest to the cover plate. The outer cylinder is fixedly connected to the cover plate and slidably connected to the inner cylinder, and is sleeved on the inner cylinder. The sealing ring is fixedly connected to the inner cylinder and contacts the inner wall of the outer cylinder, and is sleeved on the inner cylinder. The preload adjustment component is disposed on the outer cylinder. The two ends of the spring are respectively connected to the inner cylinder and the preload adjustment component, and the spring is located inside the outer cylinder.

2. The pre-sealed advanced water-stopping grouting device as described in claim 1, characterized in that, The basement roof slab has a positioning groove, which is located on the side of the basement roof slab near the cover plate; the cover plate has a positioning protrusion, which is located on the side of the cover plate near the positioning groove and extends into the positioning groove.

3. The pre-sealed advanced water-stopping grouting device as described in claim 1, characterized in that, The preload adjustment component includes a threaded rod and a movable plate. The threaded rod is threadedly connected to the outer cylinder and passes through the outer cylinder. The movable plate is rotatably connected to the threaded rod, slidably connected to the outer cylinder, and connected to the spring.

4. The pre-sealed advanced water-stopping grouting device as described in claim 3, characterized in that, The preload adjustment component also includes a limiting strip, which is fixedly connected to the outer cylinder and located inside the outer cylinder; the movable plate has a limiting groove, which cooperates with the limiting strip.

5. The pre-sealed advanced water-stopping grouting device as described in claim 1, characterized in that, The pre-sealed advanced water-stopping grouting device also includes a water-stopping steel plate, which is fixedly connected to the basement roof slab and installed on the side wall of the basement roof slab.

6. The pre-sealed advanced water-stopping grouting device as described in claim 1, characterized in that, The base plate is made of transparent acrylic sheet with a thickness of ≥18mm.

7. A pre-sealed advanced water-stopping grouting method, employing the pre-sealed advanced water-stopping grouting device as described in any one of claims 1-6, characterized in that, Includes the following steps: The inner cylinder is installed to the basement roof slab, the outer cylinder is installed to the cover plate, the outer cylinder is fitted onto the inner cylinder, and the spring is compressed by the pre-tightening force adjustment component. Two-component polyurethane sealant was filled between the cover plate and the basement roof slab, then waterproof membrane was laid, and the water-stop steel plate and transparent base plate were fixed. The system acquires real-time data from the pull rope displacement sensor to monitor the sliding amount of the inner and outer cylinders. If the spring approaches its elastic limit, the threaded rod is rotated in the opposite direction to release the pressure. When the sliding amount is ≤0.01mm / d for 7 consecutive days, inject grout through the grouting sleeve and observe the transparent bottom plate to confirm that the grout is dense; The grouting material is cured, and the quality of the post-cast strip is observed regularly through a transparent base plate.

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