Post-cast strip waterproof treatment structure and construction method thereof

Abstract

The invention discloses a post-cast strip waterproof treatment structure and a construction method thereof. The post-cast strip waterproof treatment structure comprises a core piece arranged in a post-cast strip gap, and corner waterproof pieces are arranged at the four corners of the core piece; the angle waterproof piece comprises angle steel and a plurality of short steel bars evenly arranged in the length direction of the angle steel, one ends of the short steel bars are embedded into the existing structure, the other ends of the short steel bars fixedly support the angle steel, and water stop grooves matched with the angle steel are formed in the positions, on the two sides of the gap of the post-cast strip, of the existing structure. One side of the angle steel is fixedly connected with the top plate, the other side of the angle steel is arranged in the water stop groove, and the water stop groove is filled with epoxy resin glue; a drainage structure is further arranged on the bottom plate; according to the scheme, a plurality of reliable water stopping barriers are formed by the corner waterproof pieces, the water stopping grooves and the epoxy resin glue, meanwhile, an active drainage system is matched, the leakage risk caused by water pressure accumulation is fundamentally avoided under the combined action of the blocking direction and the dredging direction, and the long-term waterproof reliability of the post-cast strip construction joint is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of waterproofing technology for underground structures, and in particular to a waterproofing treatment structure for post-pouring strips and its construction method. Background Technology

[0002] Post-cast strips are an important construction technique in building engineering. They are mainly used to solve problems such as uneven settlement and temperature shrinkage stress that may occur during the construction of large buildings or structures. In other words, a temporary strip-shaped gap is artificially reserved during the construction process to temporarily divide the structure into several parts. After the main structure is completed and a period of time has passed, this gap is then connected by pouring concrete to form a complete whole.

[0003] Waterproofing treatment is required at the joint between the auxiliary structures and the main structure of a subway station in the underground structure to address the water-facing side (the side directly exposed to groundwater or a damp environment). Unlike other building construction processes, underground construction of subway stations presents the following challenges: (1) The most effective embedded steel edge rubber waterstop cannot be pre-embedded on the side of the completed subway main structure, and the effect of pre-embedded waterproof steel plate is limited, resulting in poor initial and reliable waterproofing ability of the post-cast strip joint. (2) The load, foundation form and construction time of subway auxiliary structures (such as entrances and exits, ventilation ducts) and main structures are often quite different, which will result in different construction cycles and construction sequence between auxiliary structures and main structures. This will cause uneven settlement between auxiliary structures and main structures. Uneven settlement will cause continuous shear and tensile stress at the joints, making ordinary waterproof structures (such as waterproof coatings, rolls, expansion seals, etc.) prone to cracking and failure under such micro-deformation, which will further aggravate the leakage phenomenon of post-pouring strip construction joints. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the technical problem to be solved by the present invention is to propose a waterproof treatment structure for post-pouring strips and its construction method. In order to address the weak point of waterproofing at the construction joint of the post-pouring strip, an irregularly shaped connector is designed to cope with the uneven settlement between the auxiliary structure and the main structure, thereby reducing the risk of water leakage at the construction joint of the post-pouring strip.

[0005] To achieve this objective, the present invention adopts the following technical solution: This invention provides a waterproofing structure for post-cast strips, comprising a core component disposed within the gap of the post-cast strip. The core component is arranged along the length of the post-cast strip gap and includes a top plate, a vertical plate, and a bottom plate integrally formed in an I-shape. Corner waterproofing components are arranged at the four corners of the core component to divide the post-cast strip gap into an inner cavity and an outer cavity. The corner waterproofing components include angle steel and a plurality of short reinforcing bars evenly arranged along the length of the angle steel. One end of each short reinforcing bar is embedded in the existing structure, and the other end is fixedly supporting the angle steel. Water-stopping grooves that cooperate with the angle steel are formed in the existing structure on both sides of the post-cast strip gap. One side of the angle steel is fixedly connected to the top plate, and the other side is disposed in the water-stopping groove. The water-stopping groove is filled with epoxy resin. The inner cavity is filled with a hydrophobic layer, and the outer cavity is filled with micro-expansion fine stone concrete. Drainage structures that cooperate with the hydrophobic layer are also provided on both sides of the vertical plate on the bottom plate.

[0006] The aforementioned structure requires certain conditions during construction, such as the availability of an insertion port at one end of the post-pouring strip gap for convenient assembly. However, if it is inconvenient to create an insertion port on the construction site, space constraints will make the construction of the entire structure quite difficult. Therefore, an alternative post-pouring strip waterproofing structure is proposed, including a core component set in the post-pouring strip gap. The core component is arranged along the length of the post-pouring strip gap and includes a top plate, a vertical plate, and a bottom plate integrally formed in an I-shape. Corner waterproofing components are arranged at the four corners of the core component to waterproof the post-pouring strip gap. The structure is divided into an inner cavity and an outer cavity. The inner cavity is filled with a hydrophobic layer, and the outer cavity is filled with micro-expansion fine stone concrete. The bottom plate is also provided with drainage structures on both sides of the vertical plate to cooperate with the hydrophobic layer. The corner waterproof component includes an angle steel and a number of short steel bars evenly arranged along the length of the angle steel. One end of the short steel bar is embedded in the existing structure, and the other end is fixed to support the angle steel. A connecting plate is also provided between the top plate and the angle steel. The two sides of the connecting plate are bolted to the angle steel and the top plate, respectively. The bottom plate is bolted to the angle steel.

[0007] Based on the above two structures, from the perspective of waterproofing and sealing, the existing structures on both sides of the post-cast strip gap are provided with water-stop grooves that cooperate with the angle steel. One side of the angle steel is fixedly connected to the top plate, and the other side is set in the water-stop groove, which is filled with epoxy resin.

[0008] Based on the constructed waterproof sealing structure, to prevent water pressure buildup and seepage, simple blocking is insufficient for effective waterproofing. Therefore, in addition to sealing and waterproofing, a drainage design can be added. This drainage structure includes drainage channels on both sides of the vertical plate on the base plate. The sidewalls of these drainage channels have a plurality of evenly distributed drainage holes along the length of the post-cast strip joint. These drainage holes are conical, and the bottom of the drainage channel is arc-shaped. The drainage channel connects to an external water collection device. One end of the angle steel that mates with the top and base plates has a water-passing step. The thickness of the base plate is less than the thickness of the water-passing step. The drainage structure includes several water-conducting pipes respectively disposed between two adjacent short steel bars. One side of the angle steel has a through hole that cooperates with the water-conducting pipe. One end of the water-conducting pipe passes through the through hole and is embedded in the existing structure, and the other end extends into the drainage layer. The end of the water-conducting pipe extending into the drainage layer overlaps the surface of the water-passing step to clamp the angle steel with the short steel bars. The inner cavity surface is covered with geotextile. The top plate has an injection port that communicates with the inner cavity. The drainage layer is a graded crushed stone layer covered with geotextile.

[0009] Several diagonal bracing rods are also fixed between the top plate and the bottom plate on both sides of the vertical plate. The several diagonal bracing rods are evenly arranged along the length direction of the post-cast strip gap to increase the structural strength of the entire post-cast strip after molding.

[0010] Based on the above structure, a construction method for post-pouring strip waterproofing treatment structure can be summarized, which is used to set up the above-mentioned post-pouring strip waterproofing treatment structure, including the following steps: S00: Pre-treatment, cleaning the concrete surface on both sides of the existing structure of the post-cast strip, removing loose parts, measuring and marking the position lines of the corner waterproofing parts, the center line of the core parts, and the position lines of the drainage channels, excavating the water-stop trench, and prefabricating the required core parts, corner waterproofing parts, and water pipes according to the dimensions of the post-cast strip. S10: First, fill the gaps in the post-cast strip with micro-expansion fine stone concrete until it matches the bottom plate of the core component; S20: Then the core component is placed in the gap of the post-cast strip, and corner waterproofing components and water pipes are installed at the four corners of the core component. The core component is filled with a graded crushed stone layer covered with geotextile to form a hydrophobic layer. S30: Continue filling the top of the core component with micro-expansion fine stone concrete up to the surface of the post-cast strip gap.

[0011] Under different construction conditions, the first type is step S20, where there is no connecting plate, and the construction steps are as follows: S21: Reserve an insertion port at one end of the post-cast strip gap to mate with the core component. First, install and fix short steel bars and angle steels that mate with the four corners of the core component according to the layout position. Then, insert guide tubes sequentially through the holes of the angle steels and fix them in place. Finally, fill the gap between the angle steels and the waterstop groove with epoxy resin. S22: Assemble the core component, insert the core component into the channel formed by the corner waterproof components arranged at the four corners, fill the gap between the core component and the corner waterproof components with waterproof adhesive, and weld the core component and the corner waterproof components to fix them. S23: A geotextile bag is installed in the cavity between the core component and the existing structure of the post-cast strip, so that the opening of the geotextile bag is connected to the injection port of the top plate of the core component, and then graded crushed stone is filled into the cavity through the injection port to form a hydrophobic layer.

[0012] The second scenario is when there is no insertion port available at the construction site. In step S20, the construction steps for setting up the connecting plate are as follows: S201: First, install and fix the short steel bars and angle steel that match the bottom plate of the core component according to the layout position. Then, insert the guide pipes into the holes of the angle steel in sequence and fix them. Then, use epoxy resin to fill the gap between the angle steel and the water-stop groove. S202: Hoist the core component into the post-cast strip gap from the top, fix the bottom plate of the core component to the angle steel on both sides, and fill the gap with water-stopping adhesive. S203: Install and fix short steel bars and angle steels that match the top plate on both sides of the core component according to the layout position, then insert guide tubes sequentially through the holes of the angle steels for fixing, and then fill the gap between the angle steels and the water-stop groove with epoxy resin. S204: A geotextile bag is installed in the cavity between the core component and the existing structure of the post-cast strip. Then, graded crushed stone is filled into the geotextile bag to form a hydrophobic layer. A connecting plate is then placed on top of the core component and fixed to the corresponding angle steel and the top plate of the core component.

[0013] The beneficial effects of this invention are as follows: (1) This case uses corner waterproofing parts, water-stop grooves and epoxy resin to form multiple reliable water-stop barriers. At the same time, an active drainage system consisting of a hydrophobic layer, water pipes and drainage channels is set up to guide the water that may seep in to the external water collection device in an organized manner. This design, with the combined effect of blocking and drainage, fundamentally avoids the risk of leakage caused by water pressure accumulation and significantly improves the long-term waterproof reliability of the post-pouring strip construction joint. (2) By embedding an integrally formed I-shaped core component in the post-pouring strip and assembling it with diagonal bracing and corner waterproofing components, a high-rigidity three-dimensional reinforced frame is formed. This structure can effectively resist shear and tensile stress caused by uneven settlement, giving the post-pouring strip a certain resistance to deformation, protecting the waterproofing layer from being cracked, thereby greatly improving the structural integrity, stability and durability of this weak link. (3) The structural components (core components, corner waterproof components, etc.) of this invention can be prefabricated in the factory and assembled on site. The construction process is highly standardized and flexible construction schemes can be selected based on the limitations of the construction site. The design of the connecting plate solves the problem of core component installation in enclosed space. There is no need to reserve end insertion ports, which greatly enhances the adaptability of construction. This assembly scheme not only improves construction efficiency, but also helps to accurately control the construction quality of each waterproof node and reduces defects caused by human factors. (4) The invention connects the drainage system with the external water collection device, so that the drainage situation can be observed directly during daily maintenance, and the leakage of hidden parts can be indirectly monitored. The clear layered design (water-repellent inner cavity and load-bearing outer cavity) also provides convenience for possible local inspection or repair in the future, and reduces the maintenance cost throughout the entire life cycle. (5) The use of hot-dip galvanized angle steel, corrosion-resistant epoxy resin, micro-expansion concrete and graded crushed stone layer that is permeable and does not leak grout ensures that the structure can work reliably for a long time in the underground environment with humid and complex chemical media. This invention comprehensively solves the two major problems of leakage and structural weakening in the post-cast strip, and is especially suitable for underground projects with extremely high requirements for waterproofing and structural safety, such as subways, tunnels and integrated pipe corridors. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structural principle of a post-pouring strip waterproofing treatment structure provided in Embodiment 1 of the present invention; Figure 2 This is a three-dimensional schematic diagram of the structural principle of a post-pouring strip waterproofing treatment structure provided in Embodiment 1 of the present invention; Figure 3 This is an exploded view illustrating the principle of a post-pouring strip waterproofing structure provided in Embodiment 1 of the present invention; Figure 4 This is an assembly diagram of the corner waterproof component provided in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the structural principle of a post-pouring strip waterproofing treatment structure (with connecting plate) provided in Embodiment 2 of the present invention; Figure 6 This is a three-dimensional schematic diagram of the structural principle of a post-pouring strip waterproofing treatment structure (with connecting plate) provided in Embodiment 2 of the present invention; Figure 7This is an exploded view illustrating the principle of a waterproofing structure for post-pouring strips (with connecting plates) provided in Embodiment 2 of the present invention. Figure 8 This is a schematic diagram of the structural principle of a post-pouring strip waterproofing treatment structure provided in Embodiment 2 of the present invention when the connecting plate is not installed.

[0015] In the picture: 1. Core component; 11. Top plate; 12. Vertical plate; 13. Bottom plate; 14. Diagonal brace; 111. Injection port; 2. Corner waterproof fittings; 21. Angle steel; 22. Short reinforcing bars; 211. Perforation; 212. Water-crossing steps; 3. Post-cast strip gap; 31. Inner cavity; 32. Outer cavity; 33. Water-stop groove; 311. Drainage layer; 4. Epoxy resin adhesive; 5. Drainage structure; 51. Drainage channel; 52. Drainage hole; 6. Connecting plate; 7. Water pipe. Detailed Implementation

[0016] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] At the junction of the underground structure and the main structure of a subway station, the completed main structure lacks the conditions to prevent the installation of embedded steel-edged waterstops. Furthermore, due to objective factors such as the construction cycle and sequence of the auxiliary and main structures, uneven settlement can occur, making the waterproofing of the construction joint at the junction a weak point. Uneven settlement can lead to leakage at the construction joint. To address these issues, this invention aims to reduce the risk of leakage and improve the strength of the junction. It provides a waterproofing structure and construction method for the junction. The core idea is to install a connector (which can be installed in sections for longer sections) in the junction gap. This increases the shear and tensile strength of the junction while enhancing the sealing and incorporating active drainage design to improve the overall waterproofing capability of the junction.

[0018] Example 1: This example proposes a waterproofing structure for post-pouring strips, including a core component 1 disposed in the post-pouring strip gap 3. The core component 1 is arranged along the length of the post-pouring strip gap 3 and includes a top plate 11, a vertical plate 12, and a bottom plate 13 integrally formed in an I-shape. Corner waterproofing components 2 are arranged at the four corners of the core component 1. After the core component 1 and the corner waterproofing components 2 are assembled, the post-pouring strip gap 3 is divided into an inner cavity 31 and an outer cavity 32. Preferably, the inner cavity 31 is filled with a hydrophobic layer 311, and the outer cavity 32 is filled with micro-expansion fine stone concrete, thus forming a waterproofing structure for the post-pouring strip on the vertical plate. The basic structure at the depth of the body, with an I-shaped core component 1, can resist shear / tensile stress while ensuring the structural strength of the post-pouring strip, changing from "passive waterproofing" to "active deformation control," protecting the waterproof layer from cracking. Preferably, several diagonal bracing rods 14 are fixed on both sides of the vertical plate 12 between the top plate 11 and the bottom plate 13, and these diagonal bracing rods 14 are evenly arranged along the length direction of the post-pouring strip gap 3. On this basis, in order to further improve the waterproofing ability, instead of simply relying on sealing for waterproofing, this case adopts a solution that combines "blocking" and "dredging": (1) From the perspective of “blocking”, the corner waterproofing component 2 includes an angle steel 21 and several short steel bars 22 evenly arranged along the length of the angle steel 21. One end of the short steel bar 22 is embedded in the existing structure, and the other end is fixed to support the angle steel 21. In actual operation, the angle steel 21 is preferably hot-dip galvanized angle steel. Hot-dip galvanized angle steel has high strength and corrosion resistance. During installation, it is necessary to ensure that the hot-dip galvanized angle steel is straight. When constructing in sections, the connection between the angle steel 21 and the angle steel 21 is welded on both sides and the weld is full without slag or air bubbles. The connection between the short steel bar 22 and the supporting angle steel 21 can also be achieved by welding. Furthermore, the existing structure on both sides of the post-pouring strip gap 3 is provided with a matching angle steel 21. The water-stop trench 33 is constructed with one side of angle steel 21 fixedly connected to the top plate 11 and the other side set inside the water-stop trench 33. The water-stop trench 33 is filled with epoxy resin 4. Epoxy resin has excellent resistance to chemicals such as acids, alkalis and salts. After curing, epoxy resin has high hardness and strong wear resistance to ensure that groundwater cannot pass through the water-stop trench 33. In actual construction, epoxy resin 4 can be filled in stages until the excavated water-stop trench 33 is completely filled, so that the existing concrete of the post-cast strip is fully bonded to it, avoiding the concrete from being not dense. In this way, by adding a water-stop structure, it plays a good role in preventing water leakage from the construction joint of the post-cast strip. (2) On the basis of "blocking", the water is further actively "drained" to prevent it from accumulating at a certain point and causing leakage risk to the existing structure and the structure of the post-cast strip. Specifically, on the bottom plate 13, drainage structures 5 are set on both sides of the vertical plate 12 to cooperate with the drainage layer 311; and the drainage structure 5 includes several water guide pipes 7 respectively set between two adjacent short steel bars 22. One side of the angle steel 21 is provided with a perforation to cooperate with the water guide pipe 7. One end of the water guide pipe 7 passes through the perforation and is embedded in the existing structure, and the other end extends into the drainage layer 311. 7 can be filled with filter material to ensure water can pass through while enhancing structural strength. Further drainage structure 5 includes drainage channels 51 on both sides of the vertical plate 12 on the base plate 13. Several drainage holes 52 are evenly distributed along the length of the post-cast strip gap 3 on the sidewalls of the drainage channels 51. The drainage holes 52 are conical, and the bottom of the drainage channels 51 is arc-shaped. The drainage channels 51 are connected to an external water collection device. Thus, water in the existing structure can enter the hydrophobic layer 311 through the water pipe 7. The hydrophobic layer 311 needs to be permeable but not leaking grout. In this case... One proposed scheme involves covering the surface of the inner cavity 31 with geotextile, and providing an injection port 111 on the top plate 11 that communicates with the inner cavity 31. The drainage layer 311 is a graded crushed stone layer covered with geotextile. This allows seepage water entering the drainage layer 311 to further enter the drainage channel 51 through the drainage hole 52 and connect to an external water collection device (such as a drainage ditch or a collection well). Preferably, to facilitate the connection between the angle steel 21 and the top plate 11 and the bottom plate 13, a water-passing step 212 is provided at one end of the angle steel 21 that mates with the top plate 11 and the bottom plate 13. Simultaneously, the thickness of the bottom plate 13 is less than the thickness of the water-passing step. The thickness of step 212 is designed to ensure that seepage water can pass through the drainage layer 311 and enter the drainage channel 51 normally. It should be noted that the end of the water guide pipe 7 extends into the drainage layer 311 and overlaps the surface of the water-passing step 212 to clamp the angle steel 21 with the short steel bar 22. In terms of structural layout, the water guide pipe 7 and the short steel bar 22 are respectively on both sides of the water-passing step 212. The water guide pipe 7 and two adjacent short steel bars 22 are arranged in a V-shape. The arrangement of multiple water guide pipes 7 and short steel bars 22 on one side and both sides of the angle steel 21 in a wave-like manner can accurately position and clamp the angle steel 21 during assembly.

[0019] In summary, a construction method for a post-pouring strip waterproofing structure is provided, for setting up the post-pouring strip waterproofing structure as described above, including the following steps: S00: Pre-treatment, cleaning the concrete surface on both sides of the existing structure of the post-cast strip, removing loose parts, measuring and marking the position lines of the corner waterproof component 2, the center line of the core component 1, and the position lines of the drainage channel 51, excavating the water-stop trench 33, and prefabricating the required core component 1, corner waterproof component 2, and water pipe 7 according to the size of the post-cast strip. S10: First, fill the gap 3 of the post-cast strip with micro-expansion fine stone concrete until it fits with the base plate 13 of the core component 1; S20: Then, the core component 1 is placed in the post-cast strip gap 3, and corner waterproofing components 2 and water guide pipes 7 are installed at the four corners of the core component 1. The inner cavity 31 of the core component 1 is filled with a graded crushed stone layer covered with geotextile to form a hydrophobic layer 311; specifically, step S20 also includes the following construction steps: S21: Reserve an insertion port at one end of the post-cast strip gap 3 to mate with the core component 1. First, install and fix the short steel bars 22 and angle steel 21 that mate with the four corners of the core component 1 according to the layout position. Then, insert the guide pipes sequentially through the holes of the angle steel 21 and fix them. Finally, fill the gap between the angle steel 21 and the waterstop groove 33 with epoxy resin. S22: Assemble the core component 1, insert the core component 1 into the channel formed by the corner waterproof components 2 arranged at the four corners, fill the gap between the core component 1 and the corner waterproof components 2 with waterproof sealant, and weld the core component 1 and the corner waterproof components 2 to fix them. S23: A geotextile bag is installed in the cavity 31 between the core component 1 and the existing structure of the post-cast strip, so that the opening of the geotextile bag is connected to the injection port 111 of the top plate 11 of the core component 1, and then graded crushed stone is filled into the cavity 31 through the injection port 111 to form a hydrophobic layer 311. S30: Continue filling the top of core component 1 with micro-expansion fine aggregate concrete up to the surface of the post-cast strip joint 3.

[0020] Example 2: During the construction of the waterproofing structure in Example 1, an insertion port for the core component 1 needs to be reserved at one end of the post-pouring strip gap 3. Otherwise, it is inconvenient to install the corner waterproofing component 2 after the core component 1 is inserted, or it is inconvenient to insert the core component 1 after the corner waterproofing component 2 is installed. In this case, this example further introduces a post-pouring strip waterproofing structure based on Example 1, including a core component 1 set in the post-pouring strip gap 3. The core component 1 is set along the length of the post-pouring strip gap 3. The core component 1 includes a top plate 11, a vertical plate 12, and a bottom plate 13 that are integrally formed in an I-shape. Corner waterproofing components 2 are arranged at the four corners of the core component 1 to divide the post-pouring strip gap 3 into an inner cavity 31 and an outer cavity 32. The inner cavity 31 is filled with a hydrophobic layer 311, and the outer cavity 32 is filled with micro-expansion fine stone concrete. Drainage structures 5 that cooperate with the hydrophobic layer 311 are also provided on both sides of the vertical plate 12 on the bottom plate 13. 3. The existing structures on both sides are provided with water-stop grooves 33 that cooperate with the angle steel 21. One side of the angle steel 21 is fixedly connected to the top plate 11, and the other side is set in the water-stop groove 33. The water-stop groove 33 is filled with epoxy resin 4. The corner waterproof component 2 includes the angle steel 21 and a number of short steel bars 22 evenly arranged along the length of the angle steel 21. One end of the short steel bar 22 is embedded in the existing structure, and the other end is fixedly supporting the angle steel 21. Preferably, a connecting plate 6 is also provided between the top plate 11 and the angle steel 21. The two sides of the connecting plate 6 are bolted to the angle steel 21 and the top plate 11 respectively, and the bottom plate 13 is bolted to the angle steel 21. By adding the connecting plate 6, it is equivalent to dividing the top plate 11 to form an operation opening that is convenient for later construction. In this way, it is not necessary to reserve insertion openings at both ends of the post-pouring strip and then use the connecting plate 6 to close the operation opening, and then continue to pour micro-expansion fine stone concrete to complete the construction of the post-pouring strip.

[0021] This results in a construction method for a post-pouring strip waterproofing structure, used to install the post-pouring strip waterproofing structure as described above, including the following steps: S00: Pre-treatment, cleaning the concrete surface on both sides of the existing structure of the post-cast strip, removing loose parts, measuring and marking the position lines of the corner waterproof component 2, the center line of the core component 1, and the position lines of the drainage channel 51, excavating the water-stop trench 33, and prefabricating the required core component 1, corner waterproof component 2, and water pipe 7 according to the size of the post-cast strip. S10: First, fill the gap 3 of the post-cast strip with micro-expansion fine stone concrete until it fits with the base plate 13 of the core component 1; S20: Then, the core component 1 is placed in the post-cast strip gap 3, and corner waterproofing components 2 and water guide pipes 7 are installed at the four corners of the core component 1. The inner cavity 31 of the core component 1 is filled with a graded crushed stone layer covered with geotextile to form a hydrophobic layer 311; In step S20, the construction steps after setting the connecting plate 6 are as follows: S201: First, install and fix the short steel bars 22 and angle steel 21 that match the bottom plate 13 of the core component 1 according to the layout position. Then, insert the guide pipes into the holes of the angle steel 21 in sequence and fix them. Then, fill the gap between the angle steel 21 and the water-stop groove 33 with epoxy resin. S202: Hoist the core component 1 into the post-cast strip gap 3 from the top of the post-cast strip gap 3, fix the bottom plate 13 of the core component 1 to the angle steel 21 on both sides, and fill the gap with water-stopping glue. S203: Install and fix the short steel bars 22 and angle steel 21 that are compatible with the top plate 11 of the core component 1 according to the layout position. Then, insert the guide pipes through the holes of the angle steel 21 in sequence and fix them. Then, use epoxy resin to fill the gap between the angle steel 21 and the water-stop groove 33. S204: A geotextile bag is installed in the cavity 31 between the core component 1 and the existing structure of the post-cast strip. Then, graded crushed stone is filled into the geotextile bag to form a hydrophobic layer 311. A connecting plate 6 is then placed on top of the core component 1 and fixed to the corresponding angle steel 21 and the top plate 11 of the core component 1. S30: Continue filling the top of core component 1 with micro-expansion fine aggregate concrete up to the surface of the post-cast strip joint 3.

[0022] This invention has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. This invention is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims are also within the protection scope of this invention.

Claims

1. A post-cast strip waterproofing treatment structure, characterized by, The application relates to a core piece (1) arranged in a post-pouring belt gap (3), wherein the core piece (1) is arranged along the length direction of the post-pouring belt gap (3), the core piece (1) comprises a top plate (11), a vertical plate (12) and a bottom plate (13) which are integrally formed in an I-shaped layout, and corner waterproof pieces (2) are arranged at the four corners of the core piece (1) to divide the post-pouring belt gap (3) into an inner cavity (31) and an outer cavity (32). The corner waterproof piece (2) comprises an angle steel (21) and a plurality of short steels (22) which are uniformly arranged along the length direction of the angle steel (21), one end of the short steel (22) is embedded into an existing structure, the other end supports the angle steel (21), the existing structure on both sides of the post-pouring belt gap (3) is provided with a water stop groove (33) matched with the angle steel (21), one side of the angle steel (21) is fixedly connected with the top plate (11), and the other side is arranged in the water stop groove (33), and the water stop groove (33) is filled with epoxy resin glue (4). The inner cavity (31) is filled with a hydrophobic layer (311), the outer cavity (32) is filled with micro-expansion fine stone concrete, and the bottom plate (13) is further provided with a drainage structure (5) matched with the hydrophobic layer (311) on both sides of the vertical plate (12).

2. A post-cast strip waterproofing treatment structure, characterized by, The application relates to a core piece (1) arranged in a post-pouring belt gap (3), wherein the core piece (1) is arranged along the length direction of the post-pouring belt gap (3), the core piece (1) comprises a top plate (11), a vertical plate (12) and a bottom plate (13) which are integrally formed in an I-shaped layout, and corner waterproof pieces (2) are arranged at the four corners of the core piece (1) to divide the post-pouring belt gap (3) into an inner cavity (31) and an outer cavity (32), the inner cavity (31) is filled with a hydrophobic layer (311), the outer cavity (32) is filled with micro-expansion fine stone concrete, and the bottom plate (13) is further provided with a drainage structure (5) matched with the hydrophobic layer (311) on both sides of the vertical plate (12). The corner waterproof piece (2) comprises an angle steel (21) and a plurality of short steels (22) which are uniformly arranged along the length direction of the angle steel (21), one end of the short steel (22) is embedded into an existing structure, the other end supports the angle steel (21), the existing structure on both sides of the post-pouring belt gap (3) is provided with a water stop groove (33) matched with the angle steel (21), one side of the angle steel (21) is fixedly connected with the top plate (11), and the other side is arranged in the water stop groove (33), and the water stop groove (33) is filled with epoxy resin glue (4). The inner cavity (31) is filled with a hydrophobic layer (311), the outer cavity (32) is filled with micro-expansion fine stone concrete, and the bottom plate (13) is further provided with a drainage structure (5) matched with the hydrophobic layer (311) on both sides of the vertical plate (12).

3. A post-cast strip waterproofing treatment structure according to any one of claims 1 or 2, characterized in that, The inner cavity (31) is covered with geotextile, the top plate (11) is provided with a pouring opening (111) communicated with the inner cavity (31), and the hydrophobic layer (311) is a graded gravel layer wrapped with geotextile.

4. The post-cast strip waterproofing treatment structure according to claim 3, characterized in that, The drainage structure (5) comprises drainage channels (51) provided on the bottom plate (13) on both sides of the vertical plate (12), the side walls of the drainage channels (51) are uniformly provided with a plurality of drainage holes (52) along the length direction of the post-cast strip gap (3), the drainage holes (52) are tapered holes, the bottom of the drainage channel (51) is arc-shaped, and the drainage channel (51) is connected to an external water collecting device.

5. The post-cast strip waterproofing treatment structure according to claim 4, characterized in that, The angle steel (21) is provided with a water passing step (212) at one end in cooperation with the top plate (11) and the bottom plate (13), and the thickness of the bottom plate (13) is less than the thickness of the water passing step (212).

6. The post-cast strip waterproofing treatment structure according to claim 5, characterized in that, The drainage structure (5) comprises a plurality of water guide pipes (7) respectively arranged between adjacent two short steels (22), one side of the angle steel (21) is provided with a through hole matched with the water guide pipe (7), one end of the water guide pipe (7) is embedded into the existing structure through the through hole, and the other end extends into the water draining layer (311), and the end of the water guide pipe (7) extending into the water draining layer (311) is lapped on the surface of the water passing step (212) to clamp the angle steel (21) with the short steel (22).

7. The post-cast strip waterproofing treatment structure according to claim 6, characterized in that, A plurality of inclined struts (14) are further fixed between the top plate (11) and the bottom plate (13) on both sides of the vertical plate (12), and the plurality of inclined struts (14) are uniformly arranged along the length direction of the post-cast strip gap (3).

8. A construction method of a post-cast strip waterproof treatment structure, for setting a post-cast strip waterproof treatment structure as claimed in claim 7, characterized in that, The method comprises the following steps: S00: preprocessing, cleaning the concrete surface on both sides of the post-cast strip existing structure, removing loose parts, measuring and marking the position line of the corner waterproof part (2), the center line of the core part (1), and the position line of the drainage channel (51), digging the water stopping groove (33), and precasting the core part (1), the corner waterproof part (2), and the water guide pipe (7) according to the size of the post-cast strip; S10: first filling the micro-expanding fine stone concrete into the post-cast strip gap (3) to the position matched with the bottom plate (13) of the core part (1); S20: then placing the core part (1) in the post-cast strip gap (3), and arranging the corner waterproof part (2) and the water guide pipe (7) at the four corners of the core part (1), and filling the graded gravel layer wrapped with geotextile into the inner cavity (31) of the core part (1) to form the water draining layer (311); S30: continuing to fill the micro-expanding fine stone concrete into the top of the core part (1) to the surface of the post-cast strip gap (3).

9. The construction method of a post-cast strip waterproof treatment structure according to claim 8, characterized in that, In step S20, when there is no adapter plate (6), the construction steps are as follows: S21: reserving an insertion port matched with the core part (1) at one end of the post-cast strip gap (3), first installing the short steel (22) matched with the four corners of the core part (1) and the angle steel (21) according to the marked position, then inserting the water guide pipe (7) into the through hole of the angle steel (21) in sequence, and then filling the gap between the angle steel (21) and the water stopping groove (33) with epoxy resin glue. S22: Assemble the core piece (1), insert the core piece (1) from the channel formed by the four-cornered corner waterproof piece (2), fill the gap between the core piece (1) and the corner waterproof piece (2) with waterproof glue, and weld and fix the core piece (1) and the corner waterproof piece (2); S23: In the inner cavity (31) between the core piece (1) and the existing structure of the post-cast strip, a geotextile bag is arranged, so that the bag opening of the geotextile bag is connected to the pouring port (111) of the top plate (11) of the core piece (1), and then graded gravel is filled into the inner cavity (31) through the pouring port (111) to form a hydrophobic layer (311).

10. The construction method of a post-cast strip waterproof treatment structure according to claim 8, characterized in that, In step S20, the construction steps for setting the connecting plate (6) are: S201: First, install the short steel bars (22) and angle steels (21) matched with the two sides of the bottom plate (13) of the core piece (1) according to the position of the line, then insert the guide pipes in sequence through the perforations of the angle steels (21), and then fill the gap between the angle steels (21) and the waterproof groove (33) with epoxy resin glue; S202: Hoist the core piece (1) into the post-cast strip gap (3) from the top of the post-cast strip gap (3), and fix the bottom plate (13) of the core piece (1) to the corresponding angle steels (21) on both sides and fill the gap with waterproof glue; S203: Install and fix the short steel bars (22) and angle steels (21) matched with the two sides of the top plate (11) of the core piece (1) according to the position of the line, then insert the guide pipes in sequence through the perforations of the angle steels (21), and then fill the gap between the angle steels (21) and the waterproof groove (33) with epoxy resin glue; S204: In the inner cavity (31) between the core piece (1) and the existing structure of the post-cast strip, a geotextile bag is arranged, then graded gravel is filled into the geotextile bag to form a hydrophobic layer (311), and finally the connecting plate (6) is placed on the top of the core piece (1), and the connecting plate (6) is fixed with the corresponding angle steels (21) and the top plate (11) of the core piece (1).

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