Prefabricated wall and cast-in-place wall connection construction method

Abstract

The invention relates to the technical field of wall connection construction, and provides a prefabricated wall and cast-in-place wall connection construction method aiming at the situation that a steel bar structure reserved at the splicing end of a traditional prefabricated wall easily interferes with binding of a steel bar structure of a cast-in-place wall, the prefabricated wall and cast-in-place wall connection construction method comprises the following steps that S1, the prefabricated wall is installed, specifically, the prefabricated wall is hoisted in place; s2, steel bar binding of the cast-in-place wall, wherein a steel bar structure is bound on a construction station of the cast-in-place wall S3, a connecting assembly is installed, wherein a connecting screw rod is moved to the side, close to the prefabricated wall body, of the cast-in-place wall body steel bar structure and screwed into a corresponding threaded sleeve at the splicing end of the prefabricated wall body; s4, cast-in-place wall pouring is conducted, specifically, a cast-in-place wall formwork structure is erected, and concrete is poured to form a cast-in- And S5, the formwork structure is dismantled. The prefabricated wall and the cast-in-place wall can be effectively connected on the premise that binding of a steel bar structure of the cast-in-place wall is not affected.

Description

Technical Field

[0001] The present application relates to the field of wall connection construction, and in particular to a construction method for connecting precast walls and cast-in-place walls. Background Art

[0002] Currently, in the internal wall structure of buildings, except for load-bearing walls such as shear walls that are constructed by cast-in-place methods, the remaining non-load-bearing walls are generally constructed with precast walls. Compared with the traditional method of uniformly using cast-in-place construction for wall structures, the overall construction period is effectively shortened, and the overall construction efficiency of the wall structure is improved.

[0003] For some cast-in-place walls, due to construction requirements, they need to be poured beside the precast walls. To facilitate the better connection and formation of the cast-in-place wall and the precast wall, several steel bar joints are pre-embedded at the splicing end of the reserved wall. When tying the steel bar structure of the cast-in-place wall subsequently, the steel bar joints on the precast wall are tied to the steel bar structure of the cast-in-place wall through steel wires, so as to realize the connection between the cast-in-place wall and the precast wall after the pouring construction of the cast-in-place wall is completed.

[0004] In view of the above related technologies, the overall construction area of some cast-in-place walls is relatively narrow. When tying the steel bar structure of the cast-in-place wall in this area, the steel bar joints reserved on the precast wall are likely to cause great interference to the tying of the steel bar structure of the cast-in-place wall, affecting the normal construction progress of the cast-in-place wall. Therefore, there is room for improvement. Summary of the Invention

[0005] In order to facilitate the stable connection between the cast-in-place wall and the precast wall without affecting the tying construction of the steel bar structure of the cast-in-place wall, the present application provides a construction method for connecting precast walls and cast-in-place walls.

[0006] A construction method for connecting precast walls and cast-in-place walls provided by the present application adopts the following technical solutions: A construction method for connecting precast walls and cast-in-place walls includes the following steps: S1: Installation of precast wall: Hoist the precast wall in place; several threaded sleeves are buried along the height direction at the splicing end of the precast wall; S2: Tying of steel bars for cast-in-place wall: Tie the steel bar structure at the construction station of the cast-in-place wall; S3: Installation of connection components: Move the connection screw to the side of the steel bar structure of the cast-in-place wall close to the precast wall and screw it into the corresponding threaded sleeve on the splicing end of the precast wall; S4: Pouring of cast-in-place wall: Support the formwork structure of the cast-in-place wall and pour concrete to form the cast-in-place wall: S5: Demolition of formwork structure.

[0007] By adopting the above technical solution, after screwing the connecting screw into the corresponding threaded sleeve of the precast wall, after the subsequent precast wall is cast and formed, the effective connection between the precast wall and the cast-in-place wall can be realized by the mutual cooperation of the connecting screw and the threaded sleeve; at the same time, the connection between the connecting screw and the threaded sleeve can be carried out after the steel bar structure of the cast-in-place wall is tied up. Compared with the traditional method of reserving steel bar joints at the splicing end of the precast wall, the interference of the steel bar joints during the tying of the steel bar structure of the cast-in-place wall is avoided, so that the steel bar structure of the cast-in-place wall can be tied up smoothly.

[0008] Preferably, the following steps are further included: S6: Joint waterproof treatment: Apply waterproof coating on the opposite sides of the joint between the cast-in-place wall and the precast wall respectively to form a waterproof coating layer.

[0009] By adopting the above technical solution, the joint is sealed by the waterproof coating layers applied on both sides of the joint to limit the subsequent situation that external water seeps through the joint and corrodes the connecting screw between the precast wall and the cast-in-place wall.

[0010] Preferably, in step S6, before applying the waterproof coating, lay grid cloth on the opposite sides of the joint between the cast-in-place wall and the precast wall respectively.

[0011] By adopting the above technical solution, by first bonding the grid cloth at the joint, on the one hand, the adhesion of the subsequent applied waterproof coating can be improved by the grid cloth, so that the protective coating can adhere more firmly to the joint between the precast wall and the cast-in-place wall; on the other hand, the overall strength of the waterproof coating layer can be improved by the grid cloth to reduce the cracking of the waterproof coating layer.

[0012] Preferably, in step S3, before screwing the connecting screw into the corresponding threaded sleeve on the splicing end of the precast wall, sleeved a flexible water stop wing ring on the outer periphery of the connecting screw.

[0013] By adopting the above technical solution, after the subsequent cast-in-place wall is poured, the sealing effect of the connection between the connecting screw and the cast-in-place wall can be improved by the flexible water stop wing ring, and it is restricted that after the sealing of the joint between the precast wall and the cast-in-place wall fails, external moisture enters the interior of the cast-in-place wall through the gap between the connecting screw and the connection of the cast-in-place wall, resulting in the corrosion of the connecting screw and the internal steel bar structure of the cast-in-place wall.

[0014] Preferably, in step S3, after screwing the connecting screw into the corresponding threaded sleeve on the splicing end of the precast wall, tie the connecting screw to the steel bar structure of the cast-in-place wall by steel wire.

[0015] By adopting the above technical solution, by binding and fixing the connecting screw on the steel bar structure of the cast-in-place wall, the subsequent external load acting on the connecting screw can be transmitted to the steel bar structure of the cast-in-place wall through the connecting screw, which is beneficial to reducing the situation that the connecting screw is prone to deformation and damage due to the long-term action of the external load on the connecting screw.

[0016] Preferably, two installation grooves are provided at the splicing end of the precast wall, the top and bottom ends of the installation grooves extend to the top and bottom of the precast wall respectively, and a plurality of the threaded sleeves are all located between the two installation grooves; In step S3, after screwing the connecting screw into the corresponding threaded sleeve on the precast wall, insert a sealing plate into the two installation grooves of the precast wall and make one side of the sealing plate extend out of the splicing end of the precast wall.

[0017] By adopting the above technical solution, by inserting sealing plates into the two installation grooves, on the one hand, after the subsequent cast-in-place wall is formed by pouring, the sealing performance of the splicing part between the precast wall and the cast-in-place wall can be improved through the two sealing plates; on the other hand, a water-stop structure can be formed on both sides of a plurality of connecting screws through the two sealing plates to limit the subsequent external water source from seeping through the joint between the precast wall and the cast-in-place wall and corroding the connecting screws on the threaded sleeves, so that the connecting screws are not easily corroded and damaged by the external water source.

[0018] Preferably, two installation grooves are provided at the splicing end of the precast wall, the top and bottom ends of the installation grooves extend to the top and bottom of the precast wall respectively, and a plurality of the threaded sleeves are all located between the two installation grooves; In step S3, after screwing the connecting screw into the corresponding threaded sleeve on the precast wall, insert an expansion water-stop plate into the two installation grooves of the precast wall and make one side of the expansion water-stop plate extend out of the splicing end of the precast wall.

[0019] By adopting the above technical solution, by inserting expansion water-stop plates into the two installation grooves, on the one hand, after the subsequent cast-in-place wall is formed by pouring, the sealing performance of the splicing part between the precast wall and the cast-in-place wall can be improved through the two expansion water-stop plates; on the other hand, a water-stop structure can be formed on both sides of a plurality of connecting screws through the two expansion water-stop plates to limit the subsequent external water source from seeping through the joint between the precast wall and the cast-in-place wall and corroding the connecting screws on the threaded sleeves, so that the connecting screws are not easily corroded and damaged by the external water source.

[0020] Preferably, an XPS board is also laid on the splicing end of the precast wall.

[0021] By adopting the above technical solution, after the cast-in-place wall is formed by pouring, the rigid connection area between the cast-in-place wall and the precast wall can be reduced through the XPS board between the cast-in-place wall and the precast wall, and the internal force transmission of the subsequent cast-in-place wall to the precast wall can be restricted.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. After the steel bar structure of the cast-in-place wall is completed and tied, by screwing the connecting screw into the corresponding threaded sleeve on the splicing end of the precast wall, after the subsequent casting of the cast-in-place wall, the stable connection between the cast-in-place wall and the precast wall can be realized through the threaded connecting screw and the threaded sleeve. At the same time, the connection between the connecting screw and the threaded sleeve can be carried out after the steel bar structure of the cast-in-place wall is tied, avoiding the influence on the construction of the steel bar structure of the cast-in-place wall.

[0023] 2. By inserting the sealing plates into the two installation grooves at the splicing end of the precast wall and making the sealing plates extend out of the installation grooves, after the subsequent precast wall is cast and formed, a water stop barrier can be formed between the two sealing plates among several connecting screws to limit the external water source from contacting the connecting screws through the contact gap between the precast wall and the cast-in-place wall, which is beneficial to reducing the corrosion and damage of the connecting screws.

[0024] 3. Since the connecting plate is buried in the precast wall, several threaded sleeves are all fixedly arranged through the connecting plate and the connecting plate is tied and connected with the steel bar structure in the precast wall. On the one hand, the connecting plate is used to improve the connection integrity and structural stability of several threaded sleeves. On the other hand, the load acting on the threaded sleeve subsequently can be transmitted to the steel bar structure inside the precast wall in time through the connecting plate; at the same time, it is beneficial to limit the displacement of the threaded sleeve during the production process of the precast wall. Description of the Drawings

[0025] Figure 1 is a schematic diagram of the connection relationship between the precast wall and the cast-in-place wall in Embodiment 1 for illustration.

[0026] Figure 2 is a schematic diagram of the state when installing the precast wall in the embodiment of the present application for illustration.

[0027] Figure 3 is Figure 1 an enlarged schematic diagram of part A in

[0028] Figure 4 is a schematic diagram of the connection relationship between the precast wall and the cast-in-place wall in Embodiment 2 for illustration.

[0029] Description of the Reference Numerals: 1. Precast wall; 10. First groove; 11. Threaded sleeve; 12. Connecting plate; 13. Limiting groove; 14. Installation groove; 15. Threaded hole; 2. Cast-in-place wall; 20. Second groove; 21. Connecting screw; 211. Flexible water stop wing ring; 3. XPS board; 31. Limiting protrusion; 4. Sealing plate; 51. Mesh cloth; 5. Waterproof coating layer; 6. Expanded water stop board. Specific embodiments

[0030] The following further elaborates on this application in conjunction with the Figures 1-4 accompanying drawings.

[0031] The embodiment of this application discloses a construction method for connecting a precast wall and a cast-in-place wall, including the following steps: S1: Installation of the precast wall 1: Refer to Figure 1 and Figure 2 , and hoist the precast wall 1 in place by a hoisting device.

[0032] Refer to Figure 1 and Figure 2 , one side of the precast wall 1 facing the cast-in-place wall 2 is the splicing end of the precast wall 1; a plurality of threaded sleeves 11 are embedded in the splicing end of the precast wall 1, the plurality of threaded sleeves 11 are all horizontally arranged axially, and the plurality of threaded sleeves 11 are evenly distributed along the height direction of the precast wall 1. A connecting plate 12 is also embedded in the splicing end of the precast wall 1, the length direction of the connecting plate 12 is parallel to the height direction of the precast wall 1, the threaded sleeves 11 are all fixedly penetrated on the connecting plate 12, and the connecting plate 12 is welded and fixed to the steel bar structure in the precast wall 1.

[0033] Through the arrangement of the connecting plate 12, it is beneficial to improve the connection integrity of the plurality of threaded sleeves 11. By welding the connecting plate 12 to the steel bar structure of the precast wall 1, on the one hand, the connection and limitation of the connecting plate 12 and the plurality of threaded sleeves 11 are realized, and the displacement of the threaded sleeves 11 and the connecting plate 12 during the casting and production of the precast wall 1 is reduced; on the other hand, the external load acting on the threaded sleeves 11 subsequently can be transmitted to the steel bar structure in the precast wall 1 in time through the connecting plate 12, which is beneficial to reducing the situation that the external load acts on the threaded sleeves 11 for a long time and causes the threaded sleeves 11 to be easily deformed and damaged.

[0034] Refer to Figure 1 and Figure 2 , two installation grooves 14 are also opened on the splicing end of the precast wall 1, and the top and bottom ends of the installation grooves 14 respectively extend to the top and bottom of the precast wall 1. The plurality of threaded sleeves 11 are all located between the two installation grooves 14. First grooves 10 are formed on both opposite sides of the splicing end of the precast wall 1.

[0035] Refer to Figure 1 and Figure 2The prefabricated wall 1 also has an XPS board 3 installed on the end face of the splicing end. The XPS board 3 is glued to the splicing end of the prefabricated wall 1. The XPS board 3 is staggered with the two mounting slots 14. The side of the XPS board 3 facing the splicing end of the prefabricated wall 1 also has a protruding stop 31. The splicing end of the prefabricated wall 1 has a limiting groove 13 corresponding to the limiting groove 31. The limiting groove 31 is embedded in the limiting groove 13. The limiting groove 31 and the limiting groove 13 are used to limit the XPS board 3, thereby improving the connection integrity of the XPS board 3 and further preventing the XPS board 3 from detaching from the splicing end of the prefabricated wall 1. The XPS board 3 has a plurality of through-holes corresponding to the plurality of threaded sleeves 11, and the through-holes are connected to the corresponding threaded sleeves 11.

[0036] S2: Tie the steel bars of cast-in-place wall 2: Tie the steel bars at the construction site of cast-in-place wall 2; S3: Connect component installation, refer to Figure 1 and Figure 2 , the specific steps are as follows: S3.1: Insert the flexible water-stop ring 211 into the connecting screw 21; S3.2: Move the connecting screw 21 to the side of the steel structure of the cast-in-place wall 2 close to the precast wall 1 and screw it into the corresponding threaded sleeve 11 on the splicing end of the precast wall 1; S3.3: Repeat steps S3.1 to S3.2 until all connecting screws 21 are installed; S3.4: Secure the connecting screw 21 to the steel structure of the cast-in-place wall 2 by tying with steel wire, so that any subsequent external load acting on the connecting screw 21 can be transferred to the steel structure of the cast-in-place wall 2; S3.5: Installation of sealing plate 4: Refer to Figure 1 and Figure 3 , insert the sealing plate 4 into the two mounting grooves 14 and make one side of the sealing plate 4 extend out of the notch of the mounting groove 14; specifically, the sealing plate 4 is made of polyethylene plastic plate; before inserting the sealing plate 4 into the mounting groove 14, a long through hole is pre-opened on the side of the sealing plate 4 to be inserted into the mounting groove 14; S3.6: Drill a plurality of threaded holes 15 in the first groove 10 on the outer side of the splicing end of the prefabricated wall 1, and connect the threaded holes 15 to the elongated through holes in the sealing plate 4; S3.7: Fix the sealing plate 4: Screw the limiting bolt into the threaded hole 15 and pass the limiting bolt through the long through hole on the sealing plate 4.

[0037] S4: Cast-in-place wall 2 pouring, refer to Figure 1 and Figure 2 , the specific steps are as follows: S4.1: Formwork support: Support the formwork structure of the cast-in-situ wall 2 to form a mold cavity for pouring the cast-in-situ wall 2; S4.2: Concrete pouring: Pour concrete into the mold cavity of the cast-in-place wall 2 and vibrate it to form the cast-in-place wall 2.

[0038] In step S4, when erecting the formwork structure of the cast-in-place wall 2, a forming bump is fixed in the area corresponding to the side of the splicing end of the cast-in-place wall 2 on the inner side of the side formwork of the cast-in-place wall 2, so that when the cast-in-place wall 2 is poured, the forming bump is used to form the second groove 20 on both sides of the splicing end of the cast-in-place wall 2.

[0039] S5: Formwork structure removal: Remove the formwork structure outside the periphery of the cast-in-place wall 2.

[0040] S6: Joint waterproof treatment, the specific steps are as follows: S6.1: Unscrew the limit bolts on the threaded holes 15 on both sides of the splicing end of the precast wall 1, and inject waterproof mortar into the threaded holes 15; S6.2: Lay the fiberglass mesh 51 in the groove-like structure formed by splicing the first groove 10 on the side of the splicing end of the precast wall 1 and the second groove 20 on the side of the splicing end of the cast-in-place wall 2; S6.3: Coat the fiberglass mesh 51 on both sides of the joint between the precast wall 1 and the cast-in-place wall 2 with waterproof coating to form a waterproof coating layer 5. Specifically, the waterproof coating uses cement-based waterproof coating.

[0041] By inserting the sealing plate 4 into the two installation grooves 14 at the splicing end of the precast wall 1 and making one side of the sealing plate 4 extend out of the notch of the installation groove 14; after subsequently screwing the connecting screw 21 into the corresponding threaded sleeve 11 at the splicing end of the precast wall 1 and completing the pouring of the cast-in-place wall 2, a water-stop structure can be formed on both sides of a number of connecting screws 21 at the joint between the precast wall 1 and the cast-in-place wall 2 through the sealing plates 4 at the two installation grooves 14, so as to limit the subsequent situation that external water seeps through the joint between the precast wall 1 and the cast-in-place wall 2 and corrodes the connecting screws 21; at the same time, the connection strength at the joint between the precast wall 1 and the cast-in-place wall 2 can be improved through the two sealing plates 4.

[0042] Limiting the sealing plate 4 through the limit bolt is beneficial to restricting the situation that the sealing plate 4 is displaced due to concrete disturbance during the subsequent pouring process of the cast-in-place wall 2.

[0043] By laying the XPS board 3 at the splicing end of the precast wall 1, after the subsequent pouring of the cast-in-place wall 2 is completed, the rigid contact area between the precast wall 1 and the cast-in-place wall 2 can be reduced through the XPS board 3, thereby restricting the subsequent internal force transfer of the cast-in-place wall 2 to the precast wall 1 and reducing the situation that the precast wall 1 bears the internal force from the cast-in-place wall 2.

[0044] By bonding the fiberglass mesh 51 to the opposite sides of the joint between the precast wall 1 and the cast-in-place wall 2 and applying a waterproof coating layer 5. The waterproof coating layer 5 is used to seal the joint between the precast wall 1 and the cast-in-place wall 2, so as to further restrict the subsequent external water source from infiltrating and corroding the connecting screw 21 through the joint between the precast wall 1 and the cast-in-place wall 2. The setting of the fiberglass mesh 51, on the one hand, is beneficial to improving the adhesion of the subsequent waterproof coating, so that the waterproof coating can be more firmly bonded to the joint between the precast wall 1 and the cast-in-place wall 2. At the same time, the fiberglass mesh 51 can be used to improve the overall strength of the waterproof coating layer 5 and reduce the occurrence of cracking of the subsequent waterproof coating layer 5.

[0045] Example Two The difference between Example Two and Example One lies in steps S3 and S6. Refer to Figure 4 , where Step S3: Installation of the connection components. Refer to Figure 1 and Figure 4 , and the specific steps are as follows: S3.1: Slip a flexible water stop wing ring 211 onto the connecting screw 21; S3.2: Move the connecting screw 21 to the side of the steel bar structure of the cast-in-place wall 2 close to the precast wall 1 and screw it into the corresponding threaded sleeve 11 on the splicing end of the precast wall 1; S3.3: Repeat steps S3.1 to S3.2 until all the connecting screws 21 are installed; S3.4: Fix the connecting screw 21 to the steel bar structure of the cast-in-place wall 2 by wire tying; so that the subsequent external load acting on the connecting screw 21 can be transmitted to the steel bar structure of the cast-in-place wall 2; S3.5: Installation of the expansion water stop plate 6. Refer to Figure 4 , insert the expansion water stop plate 6 into the two installation grooves 14 and make one side of the expansion water stop plate 6 extend out of the notch of the installation groove 14.

[0046] S6: Joint waterproof treatment. The specific steps are as follows: S6.1: Lay the fiberglass mesh 51 in the groove-like structure formed by splicing the first groove 10 on the side of the splicing end of the precast wall 1 and the second groove 20 on the side of the splicing end of the cast-in-place wall 2; S6.2: Apply a waterproof coating to the fiberglass mesh 51 on the opposite sides of the joint between the precast wall 1 and the cast-in-place wall 2 to form a waterproof coating layer 5. Specifically, the waterproof coating uses a cement-based waterproof coating.

[0047] The expansion water stop plate 6 is used to improve the sealing effect of the joint between the precast wall 1 and the cast-in-place wall 2. At the same time, a water blocking structure can be formed on both sides of the threaded sleeve 11 by the connecting rod to restrict the external moisture from contacting the threaded sleeve 11 and the connecting screw 21.

[0048] After the steel bar structure of the cast-in-place wall 2 is bound and connected, the connecting screw 21 is screwed into the corresponding threaded sleeve 11 of the precast wall 1 on the side of the steel bar structure of the cast-in-place wall 2 close to the precast wall 1. After the cast-in-place wall 2 is poured, the threaded sleeve 11 and the connecting screw 21 connected by threads are used to realize the stable connection between the precast wall 1 and the cast-in-place wall 2. At the same time, the connection between the connecting screw 21 and the threaded sleeve 11 is constructed only after the steel bar structure of the cast-in-place wall 2 is bound. This is beneficial to avoiding interference with the binding of the steel bar structure of the cast-in-place wall 2, and thus beneficial to the smooth progress of the construction of the cast-in-place wall 2.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A construction method for connecting precast wall and cast-in-situ wall, characterized in that: It includes the following steps: S1: Installation of precast wall (1): Hoist the precast wall (1) in place; a number of threaded sleeves (11) are buried along the height direction at the splicing end of the precast wall (1). S2: Steel bar binding of cast-in-place wall (2): Bind the steel bar structure at the construction station of the cast-in-place wall (2). S3: Installation of connection components: Move the connecting screw (21) to the side of the steel bar structure of the cast-in-place wall (2) close to the precast wall (1) and screw it into the corresponding threaded sleeve (11) at the splicing end of the precast wall (1). S4: Pouring of cast-in-place wall (2): Support the formwork structure of the cast-in-place wall (2) and pour concrete to form the cast-in-place wall (2). S5: Demolition of formwork structure.

2. The construction method for connecting a precast wall and a cast-in-place wall according to claim 1, wherein: It also includes the following steps: S6: Joint waterproof treatment: Apply waterproof coating on both opposite sides at the joint between the cast-in-place wall (2) and the precast wall (1) to form a waterproof coating layer (5).

3. The method for connecting a prefabricated wall with a cast-in-place wall according to claim 2, characterized in that: In step S6, before applying the waterproof coating, lay grid cloth (51) on both opposite sides at the joint between the cast-in-place wall (2) and the precast wall (1).

4. The method for connecting a prefabricated wall with a cast-in-place wall according to claim 2, characterized in that: In step S3, before screwing the connecting screw (21) into the corresponding threaded sleeve (11) at the splicing end of the precast wall (1), sleeved a flexible water stop wing ring (211) on the outer periphery of the connecting screw (21).

5. A construction method for connecting a precast wall and a cast-in-place wall according to claim 4, characterized in that: In step S3, after screwing the connecting screw (21) into the corresponding threaded sleeve (11) at the splicing end of the precast wall (1), tie the connecting screw (21) to the steel bar structure of the cast-in-place wall (2) with steel wire.

6. The method for connecting a prefabricated wall with a cast-in-place wall according to claim 1, characterized in that: Two installation grooves (14) are provided at the splicing end of the precast wall (1), and the top and bottom ends of the installation grooves (14) extend to the top and bottom of the precast wall (1) respectively. A number of the threaded sleeves (11) are all located between the two installation grooves (14). In step S3, after screwing the connecting screw (21) into the corresponding threaded sleeve (11) on the precast wall (1), insert a sealing plate (4) into the two installation grooves (14) of the precast wall (1) and make one side of the sealing plate (4) extend out of the splicing end of the precast wall (1).

7. A construction method for connecting a precast wall and a cast-in-place wall according to claim 1, characterized in that: Two installation grooves (14) are provided at the splicing end of the precast wall (1), and the top and bottom ends of the installation grooves (14) extend to the top and bottom of the precast wall (1) respectively. A number of the threaded sleeves (11) are all located between the two installation grooves (14). In step S3, after screwing the connecting screw (21) into the corresponding threaded sleeve (11) on the precast wall (1), insert an expansion water stop plate (6) into the two installation grooves (14) of the precast wall (1) and make one side of the expansion water stop plate (6) extend out of the splicing end of the precast wall (1).

8. A construction method for connecting a prefabricated wall and a cast-in-place wall according to any one of claims 1 to 7, characterized in that: The splicing end of the precast wall (1) is also laid with an XPS board (3).

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