New and old wall waterproof layer mechanical occlusion sealing connection device and construction method

Abstract

A mechanical occlusion sealing connection device for waterproof layers of new and old walls comprises a fixed base section (1) and a sealing cover plate section (2), and is characterized in that the fixed base section (1) is a long-strip-shaped aluminum alloy plate, splicing lock catches (12 and 13) used for lengthening are arranged at the two ends of the long-strip-shaped aluminum alloy plate respectively, the sealing cover plate section (2) is a long-strip-shaped aluminum alloy plate matched with the fixed base section (1), and the splicing lock catches (12 and 13) are arranged at the two ends of the long-strip-shaped aluminum alloy plate. A plurality of bolt holes (3) are formed in the long-strip-shaped aluminum alloy plate, and bolt nails (17) are provided and are fastened and spliced into the required sealing connection length through the bolt holes (3) of the fixed base section (1) and the sealing cover plate section (2). The new and old wall waterproof layer mechanical occlusion sealing connecting device and the construction method have the advantages that complete mechanical connection is achieved, the base plane requirement is low, sealing is reliable, durability is good, and long-term sealing effectiveness and leakage resistance of connecting joints are guaranteed through multiple sealing design.

Description

Technical Field

[0001] This invention belongs to the field of building waterproofing engineering technology. Specifically, it is a mechanical interlocking and sealing connection device and construction method for waterproofing layers of new and old walls. Background Technology

[0002] After the walls of an underground space are completed and waterproofing is finished, if openings are needed to create new spaces and add external connection channels due to functional expansion, the effective connection between the old and new waterproofing layers is crucial to preventing leakage. In existing technologies, the old and new waterproofing layers are typically joined by adhesive overlap or hot-melt overlap. However, the exterior of the original walls in an underground space is constantly exposed to the underground environment, and its surface is prone to accumulating impurities such as soil, silt, and corrosive media, which are difficult to clean completely. This results in insufficient adhesion of the adhesive surfaces and gaps easily appearing in the hot-melt overlap, creating potential leakage hazards. Some projects use edge-sealing strips for auxiliary fixing, but traditional edge-sealing strips are integral structures with poor adaptability. Furthermore, relying solely on mechanical fixing lacks sealing redundancy and cannot cope with the seepage pressure caused by changes in groundwater levels. Simultaneously, the fixing process can easily damage the integrity of the original waterproofing layer, further exacerbating the risk of leakage. Existing construction methods have not solved the problem of interlocking and locking between new and old waterproofing layers, and the layer is prone to detachment under dynamic loads. Therefore, there is an urgent need for a purely mechanical connection device that does not require thorough cleaning of the original wall impurities, can be modularly spliced, and has both mechanical fixing and multiple sealing functions, so as to achieve a reliable connection between the old and new waterproof layers. Summary of the Invention

[0003] The purpose of this invention is to provide a safe and reliable mechanical interlocking and sealing connection device for waterproof layers of new and old walls.

[0004] Another objective of this invention is to provide a safe and reliable construction method for mechanically interlocking and sealing the waterproofing layers of new and old walls.

[0005] To achieve the above objectives, the technical solution of the present invention is: A mechanical interlocking and sealing connection device for waterproof layers of new and old walls, comprising a fixed base section and a sealing cover plate section, characterized in that: The fixed base section is a long strip of aluminum alloy plate. Each end of the strip has a splicing latch for extension. One end of the splicing latch has a splicing protrusion for sealing, and the other end has a matching splicing groove for extending several fixed base sections. The aluminum alloy plate has several bolt holes. On one side of the lower part of the aluminum alloy plate, there are several vertically downward waterproof pressure points for interlocking with the old wall waterproofing layer. Between the waterproof pressure points, there are grouting areas for grouting. On one side of the upper part of the aluminum alloy plate, there is a vertically upward-facing cover plate support. On the other side of the lower part of the aluminum alloy plate, there is a bottom support. On the other side of the upper part of the aluminum alloy plate, there is an upward-facing serrated lower end interlocking feature. The sealing cover plate section is a long strip of aluminum alloy plate that matches the fixed base section. The long strip of aluminum alloy plate has several bolt holes. A sealing gasket is provided on the lower part of one side of the sealing cover plate section for sealing and fitting with the cover plate support seat. The lower part of the other side of the sealing cover plate section has a downward serrated upper end engagement for engaging with the lower end engagement to engage with the new wall waterproof layer. Wherein: bolts are provided, which are fastened and spliced ​​to the fixed base section and the sealing cover section through the bolt holes to form the required sealing connection length.

[0006] The mechanical interlocking and sealing connection device for the new and old wall waterproofing layers of the present invention can also be further implemented by the following technical measures.

[0007] The aforementioned mechanical interlocking sealing connection device for the new and old wall waterproofing layers, wherein the length, width, and thickness dimensions of the long strip aluminum alloy plate of the fixed base section are 120mm×150mm×100mm.

[0008] The aforementioned mechanical interlocking sealing connection device for the new and old wall waterproofing layers, wherein the bolt is an M12 bolt.

[0009] The aforementioned mechanical interlocking sealing connection device for the new and old wall waterproofing layers, wherein the grouting area is a grouting area with a length of 10mm and a height of 5mm.

[0010] The aforementioned mechanical interlocking sealing connection device for the new and old wall waterproofing layers includes a 4mm diameter water-swellable material at the end of the waterproofing pressure point, which serves as a soft connection with the waterproofing protective layer.

[0011] The aforementioned mechanical interlocking sealing connection device for the new and old wall waterproofing layers, wherein the length, width, and thickness dimensions of the sealing cover section are 120mm × 150mm × 5mm.

[0012] A construction method for mechanically interlocking and sealing new and old wall waterproofing layers, characterized by the following steps: a. Basic pretreatment and positioning layout Mark the center line of the device and the fixed reference line along the designed location of the joint between the new and old walls; b. The fixed base section is installed and pressed firmly against the old waterproof layer, including the following steps: 1) Single-section device placement: Place the fixed base section tightly against the surface of the old wall waterproof layer and align it with the positioning reference line; make the lower waterproof pressure point directly opposite the old wall waterproof layer, and make the bottom support base tightly fit with the base layer; 2) Segmented splicing and sealing: The splicing lock of one fixed base segment is fastened to the splicing lock of the next fixed base segment, and the reserved splicing protrusion of one segment is embedded into the reserved splicing groove of the next segment. 3) Mechanical fixing and interlocking compaction: Bolts are used to anchor the fixing base section to the old wall through the bolt holes, ensuring that the waterproof pressure point is embedded in the surface of the waterproof layer of the old wall; 4) Grouting inspection and sealing reinforcement: After all the fixed base sections are installed, inject clean water or pressure test liquid through the grouting area in the middle to check the tightness of the waterproof pressure point and the old wall waterproof layer; after maintaining no leakage or pressure drop for 30 minutes, drain the test liquid, and then inject waterproof grout (preferably epoxy grout or cement-based penetrating crystalline grout to fill the gap) through the grouting area. c. Laying and fixing of the new waterproof layer with double interlocking To construct a new waterproof layer on the outside of the newly poured wall, cut the new waterproof layer roll to the designed width, ensuring the surface of the roll is flat and wrinkle-free. Lay the end of the new waterproof layer roll above the lower interlocking part of the fixed base section, and adjust the position so that the edge of the roll is aligned with the interlocking area. Then cover the fixed base section with the sealing cover section, aligning the upper interlocking part of the sealing cover section with the lower interlocking part, forming a double clamping effect on the new waterproof layer. d. Install bolts through the bolt holes of the sealing cover section; during the tightening process, ensure that the upper and lower engagements clamp the new waterproof layer simultaneously, and at the same time, the sealing gasket on the left side of the sealing cover section and the cover support groove of the fixed base section are tightly fitted to achieve a seal.

[0013] The mechanical interlocking and sealing connection construction method for the new and old wall waterproofing layers of the present invention can also be further implemented by the following technical measures.

[0014] In the aforementioned method, the pressure of the pressure test fluid is ≤0.1MPa.

[0015] In the aforementioned method, the waterproof grout is an epoxy grout or a cement-based penetrating crystalline grout.

[0016] After adopting the above technical solution, the mechanical interlocking sealing connection device and construction method for the new and old wall waterproofing layers of the present invention have the following advantages: 1. Fully mechanical connection with low substrate requirements: Through anchor bolt fixation and elastic interlocking, it does not rely on the bonding of the new and old waterproof layers, completely solving the problem of bonding failure caused by contamination and dampness on the outside of the original waterproof layer. 2. Reliable sealing and good durability: The multi-seal design (mechanical compression, pre-embedded rubber strips, and optional sealant) ensures the long-term sealing effectiveness of the connection nodes and has excellent anti-leakage performance; 3. High adaptability and convenient construction: The device can be spliced ​​and extended, the components can be prefabricated, the on-site installation speed is fast, it is highly adaptable to the construction environment, and the quality is easy to control; 4. Reasonable structure and high strength: The device integrates anchoring force, clamping force and sealing function into one, with a stable structure that can resist certain base deformation and groundwater pressure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the fixed base segment structure according to an embodiment of the present invention; Figure 2 This is a plan view of the fixed base section according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the sealing cover plate segment structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the overall structure of the mechanical interlocking and sealing connection device for the waterproof layers of new and old walls according to an embodiment of the present invention. Detailed Implementation

[0018] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0019] Example 1 Please see now Figures 1-4 The mechanical interlocking sealing connection device for the new and old wall waterproofing layers of the present invention is a long strip-shaped mechanical sealing assembly with an asymmetrical composite structure in cross-section. It includes a fixed base section 1 and a sealing cover plate section 2, and each section can be integrally die-cast using aluminum alloy profiles.

[0020] The fixed base section 1 is a flat plate structure measuring 120mm × 150mm × 100mm. Multiple 12mm diameter through-holes (3) for threaded internal walls facilitate later fixation to the existing structural wall using M12 studs (17). The lower left side features a first waterproof pressure point 14 (10mm long) and a second waterproof pressure point 5 (5mm thick) for engaging with the existing waterproof protective layer. The ends of the pressure points are fitted with a 4mm diameter water-swellable material, providing a flexible connection to the waterproof protective layer. Using industry-recognized technology, a 10mm long and 5mm high grouting zone 6 is located in the center of the pressure point area to verify the effectiveness of the first and second waterproof pressure points 14 and 5 in maintaining the existing waterproof protective layer. The tightness of the interlocking layers and subsequent grouting are ensured; a 10mm long and 20mm thick cover plate support seat 10 is provided on the upper left side; a 10mm×10mm left-side splicing lock 12 is provided at the left end for connecting the extended section; a 10mm long and 5mm thick bottom support seat 7 is provided on the lower right side; a 30mm long and 10mm thick lower end interlocking 8 is provided at the upper right end for interlocking with a 30mm long and 10mm thick upper end interlocking 9 to interlock the new waterproof layer; a 10mm×10mm right-side splicing lock 13 is provided at the right end for connecting the extended section; a 5mm diameter protruding seal 15 is provided at the front end for assembling and lengthening in conjunction with a 5mm diameter pre-reserved splicing groove 14 at the rear end to achieve effective sealing.

[0021] Sealing cover section 2: A flat plate structure, measuring 120mm × 150mm × 5mm, with multiple 12mm diameter through-holes 3 for studs. A 5mm diameter sealing gasket 11 is located on the lower left side, forming a 5mm diameter groove with the cover support 10 for effective sealing. A 30mm long, 10mm thick upper engagement 9 is located on the lower right side, engaging with a 30mm long, 10mm thick lower engagement 8 to seal the new waterproof layer. A 5mm diameter pre-reserved assembly protrusion seal 15 at the front end, combined with a 5mm diameter pre-reserved splicing groove 14 at the rear end, is used for assembly, lengthening, and effective sealing. Sealing cover section 2 is assembled in multiple sections using a 50mm × 20mm × 2mm splicer 16.

[0022] Example 2 Based on the "fixed base section + sealing cover plate section" combined device, the construction steps of the mechanical interlocking and sealing connection construction method of the new and old wall waterproofing layers of the present invention are as follows, the core of which realizes the interlocking and fixing of the existing waterproofing protective layer, the double interlocking and sealing of the new waterproofing layer, the segmented splicing and sealing and the grouting inspection in one integrated manner.

[0023] 1. Base layer pretreatment and positioning layout Draw double lines (the center line of the device and the fixed reference line) along the designed position of the joint between the new and old walls to ensure that the device is installed straight and that the spacing between the double lines matches the width of the fixed base section (error ≤ 2mm). 2. The fixed base section is installed and compacted to interlock with the old waterproof layer. Single-section device placement: Place the fixed base section 1 tightly against the surface of the existing structural wall and align it with the positioning reference line; ensure that the waterproof pressure point 4 and the second waterproof pressure point 5 on the lower left are directly opposite the old waterproof layer, and that the bottom support 7 on the right is tightly attached to the base layer to avoid being suspended. Segmented splicing and sealing: If the joint length exceeds the length of a single segment, the left splicing lock 12 on the left side of the fixed base segment is fastened to the left splicing lock 12 on the left side of the next segment, and the right splicing lock 13 on the right side of the next segment is fastened to the right splicing lock 13 on the right side of the next segment. At the same time, the reserved splicing protrusion 15 of the previous segment is embedded into the reserved splicing groove 14 of the next segment, ensuring that the protrusion and the groove are completely fitted at the splice to achieve a mechanical seal; repeat this step until the entire joint length is covered. Mechanical fixing and interlocking compaction: The fixing base section is anchored to the existing structural wall by using studs 17 through the stud holes 3 of the fixing base section; during the tightening process, ensure that the first waterproof pressure point 4 and the second waterproof pressure point 5 are gradually embedded into the surface of the old waterproof layer to form mechanical interlocking, and the interlocking depth is controlled at 0.50-1mm (to avoid damaging the old waterproof layer itself). Grouting Inspection and Sealing Enhancement: After all the fixed base sections are installed, use industry-known technology to inject clean water or pressure test fluid (pressure ≤ 0.1MPa) through the grouting zone 6 in the middle to check the tightness of the first waterproof pressure point 4, the first waterproof pressure point 5 and the old waterproof layer; after maintaining no leakage or pressure drop for 30 minutes, drain the test fluid, and then inject special waterproof grout (preferably epoxy grout or cement-based penetrating crystalline grout) through the grouting zone to fill the gaps and form a permanent seal.

[0024] New waterproof layer installation and double-interlocking fixation When constructing a new waterproof layer on the outside of the newly poured wall, cut the new waterproof layer roll to the designed width to ensure that the surface of the roll is flat and wrinkle-free. Lay the end of the new waterproof layer roll above the lower end engagement 8 of the fixed base section, and adjust the position so that the edge of the roll is aligned with the engagement area; then cover the fixed base section with the sealing cover section 2, so that the upper end engagement (9) of the sealing cover section is aligned with the lower end engagement 8, forming a double clamping of the new waterproof layer. Install the stud 17 through the stud through hole 3 of the sealing cover plate section; during the tightening process, ensure that the upper end engagement 9 and the lower end engagement 8 clamp the new waterproof layer simultaneously, and at the same time, the sealing gasket 11 on the left side of the sealing cover plate section and the groove of the cover plate support seat 10 of the fixed base section are tightly fitted to achieve a seal. If the joint length is long, multiple sealing cover sections are assembled using the splicer 16. The splice position is aligned with the splice position of the fixed base section to ensure that the reserved splicing protrusion 15 and the reserved splicing groove 14 are sealed and fitted together. Sealing and additional protection of splice joints Apply butyl waterproof sealant to all joints of the device (locking connections, protrusion-groove mating areas), with a sealant thickness of ≥3mm, covering the joint gaps and the area around the locks to form a secondary seal.

[0025] This invention has substantial features and significant technological advancements. The mechanical interlocking sealing connection device and construction method for the new and old wall waterproofing layers of this invention have a reasonable connection structure and high strength. The connection device integrates anchoring force, clamping force and sealing function into one, with a stable structure that can resist certain base deformation and groundwater pressure. It has reliable sealing and good durability. The multiple sealing design (mechanical compression, pre-embedded rubber strips, and optional sealant) ensures the long-term sealing effectiveness of the connection nodes and has excellent anti-leakage performance.

[0026] The above embodiments are for illustrative purposes only and are not intended to limit the invention. Those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions should also fall within the scope of this invention and are defined by the claims.

Claims

1. A mechanical interlocking sealing connection device for waterproof layers of new and old walls, comprising a fixed base section (1) and a sealing cover plate section (2), characterized in that: The fixed base section (1) is a long strip of aluminum alloy plate. Each end of the long strip of aluminum alloy plate is provided with splicing buckles (12, 13) for extension. One end of the splicing buckle at both ends is provided with a splicing protrusion seal (15), and the other end is provided with a matching splicing groove (14) for extending several fixed base sections. Several bolt holes (3) are provided on the aluminum alloy plate. Several vertically downward waterproof pressure points are provided on the lower part of one side of the aluminum alloy plate for interlocking with the waterproof layer of the old wall. A grouting area (6) for grouting is provided between the waterproof pressure points. A vertically upward cover plate support seat (10) is provided on the upper part of one side of the aluminum alloy plate. A bottom support seat (7) is provided on the lower part of the other side of the aluminum alloy plate. An upward serrated lower end interlocking (8) is provided on the upper part of the other side of the aluminum alloy plate. The sealing cover plate section (2) is a long strip aluminum alloy plate that matches the fixed base section (1). The long strip aluminum alloy plate is provided with several bolt holes (3). A sealing gasket (11) is provided on the lower part of one side of the sealing cover plate section for sealing cooperation with the cover plate support seat (10). The lower part of the other side of the sealing cover plate section is provided with a downward sawtooth-shaped upper end engagement (9) for cooperating with the lower end engagement (8) to engage the new wall waterproof layer. Wherein: a bolt (17) is provided, which is fastened to the required sealing connection length by the bolt holes (3) of the fixed base section (1) and the sealing cover section (2).

2. The mechanical interlocking and sealing connection device for new and old wall waterproofing layers as described in claim 1, characterized in that, The dimensions of the long strip aluminum alloy plate of the fixed base section (1) are 120mm×150mm×100mm.

3. The mechanical interlocking and sealing connection device for waterproof layers of new and old walls as described in claim 1, characterized in that, The bolt (17) is an M12 bolt.

4. The mechanical interlocking and sealing connection device for waterproof layers of new and old walls as described in claim 1, characterized in that, The grouting area is a grouting area with a length of 10 mm and a height of 5 mm (6).

5. The mechanical interlocking and sealing connection device for waterproof layers of new and old walls as described in claim 1, characterized in that, The end of the waterproof pressure point is provided with a water-swellable material with a diameter of 4mm, which serves as a soft connection with the waterproof protective layer.

6. The mechanical interlocking and sealing connection device for waterproof layers of new and old walls as described in claim 1, characterized in that, The length, width, and thickness of the sealing cover section (2) are 120mm × 150mm × 5mm.

7. A construction method for mechanically interlocking and sealing the waterproof layers of new and old walls as described in claim 1, characterized in that... Includes the following steps: a. Basic pretreatment and positioning layout Mark the center line of the device and the fixed reference line along the designed location of the joint between the new and old walls; b. The fixed base section is installed and pressed firmly against the old waterproof layer, including the following steps: 1) Single-section device placement: Place the fixed base section (1) tightly against the surface of the old wall waterproof layer and align it with the positioning reference line; make the lower waterproof pressure point (4) and waterproof pressure point (5) face the old wall waterproof layer, and make the bottom support (7) fit tightly against the base layer; 2) Segmented splicing and sealing: The splicing lock (12) of one fixed base segment is fastened to the splicing lock (13) of the next fixed base segment, and the reserved splicing protrusion (15) of one segment is embedded into the reserved splicing groove (14) of the next segment. 3) Mechanical fixing and interlocking compaction: Using bolts (17) through the bolt holes (3) of the fixing base section, the fixing base section is anchored to the old wall to ensure that the waterproof pressure points (4,5) are embedded in the surface of the waterproof layer of the old wall; 4) Grouting inspection and sealing reinforcement: After all the fixed base sections are installed, inject clean water or pressure test liquid through the grouting area (6) in the middle to check the tightness of the waterproof pressure point (4,5) and the old wall waterproof layer; after keeping it without leakage or pressure drop for 30 minutes, drain the test liquid, and then inject waterproof grout (preferably epoxy grout or cement-based penetrating crystalline grout to fill the gap) through the grouting area. c. Laying and fixing of the new waterproof layer with double interlocking To construct a new waterproof layer on the outside of the newly poured wall, cut the new waterproof layer roll to the designed width, ensuring that the roll surface is flat and wrinkle-free; lay the end of the new waterproof layer roll above the lower end interlocking (8) of the fixed base section, and adjust the position so that the edge of the roll is aligned with the interlocking area; then cover the fixed base section with the sealing cover section (2), so that the upper end interlocking (9) of the sealing cover section is aligned with the lower end interlocking (8), forming a double clamping of the new waterproof layer; d. Install bolts (17) through the bolt holes (3) of the sealing cover section; during the tightening process, ensure that the upper end engagement (9) and the lower end engagement (8) clamp the new waterproof layer simultaneously, and at the same time, the sealing gasket (11) on the left side of the sealing cover section and the groove of the cover support seat (10) of the fixed base section are tightly fitted to achieve sealing.

8. The construction method for mechanically interlocking and sealing the waterproof layers of new and old walls as described in claim 7, characterized in that, The pressure of the pressure test fluid is ≤0.1MPa.

9. The construction method for mechanically interlocking and sealing the waterproof layers of new and old walls as described in claim 7, characterized in that, The waterproof grouting material is either epoxy grouting liquid or cement-based penetrating crystalline grouting material.

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