Cast-in-place concrete tension bolt hole sealing device and method

Abstract

The present invention discloses a cast-in-place concrete tension bolt hole sealing device and method. The device and method comprises the following steps: two annular grooves are excavated in the wall of the tension bolt hole along the inner circumference of the wall of the tension bolt hole, and then a sealing plate is placed in each of the two annular grooves. The end faces of the sealing plates in the annular grooves can contact the side walls of the annular grooves in which they are located. The two sealing plates are then fastened and connected along the axial direction of the tension bolt hole. Finally, slurry is sealed and filled on the outer sides of the two sealing plates to be flush with the outer wall surface and the inner wall surface of the cast-in-place concrete respectively. A sealing space is formed in the tension bolt hole by cooperating with the end of the annular groove to separate the two ends of the tension bolt hole, thereby effectively preventing leakage of the tension bolt hole of the cast-in-place concrete structure. A tapered structure of the tension bolt hole is formed by using a variable diameter protective tube to assist the cast-in-place process, thereby effectively preventing leakage and backflow of the outer wall.

Description

Technical Field

[0001] The invention relates to the field of plugging reserved holes in reinforced concrete structures, and in particular to a device and method for plugging cast-in-place concrete tension bolt holes. Background Art

[0002] At present, the metal formwork commonly used in cast-in-place concrete structures of high-rise buildings is all-steel large curtains and aluminum alloy formworks. All-steel large curtains and aluminum alloy formworks are used for concrete pouring. After pouring, the inner and outer formworks need to be fixed with tension bolts. Due to design reasons, the hole diameter of the tension bolt holes of the metal formwork is relatively large. In the later processing process, the tension bolt holes need to be sealed. At present, traditional sealing adopts the construction method of direct filling and plugging with waterproof mortar. After filling, due to the fluidity of the mortar, the tension bolt holes have no slope and water backflow often occurs. In the process of direct filling and plugging with waterproof mortar, the bonding gap between the waterproof mortar and the concrete structure is prone to leakage, and the sealing of the plugging cannot be effectively guaranteed. In the later processing process, the leakage problem caused by the sealing of the tension bolt holes cannot be avoided. Summary of the invention

[0003] The purpose of the present invention is to provide a cast-in-place concrete tension bolt hole plugging device and method to overcome the deficiencies of the prior art.

[0004] In order to achieve the above object, the present invention adopts the following technical scheme:

[0005] A method for sealing a cast-in-place concrete tension bolt hole comprises the following steps:

[0006] Step 1), two annular grooves are excavated in the wall of the tension bolt hole along the inner circumference of the tension bolt hole wall;

[0007] Step 2) Place a sealing plate in each of the two annular grooves, so that the end face of the sealing plate in the annular groove can contact the side wall of the annular groove, and then fasten the two sealing plates axially along the tension bolt holes. Finally, fill the outer sides of the two sealing plates with slurry sealing, so that they are flush with the outer and inner wall surfaces of the cast-in-place concrete respectively.

[0008] Furthermore, in step 1), during the installation of the two formworks for pouring cast-in-place concrete, a variable diameter protective tube is pre-embedded at the designed position of the tension bolts, the variable diameter protective tube is located between the two formworks, and the tension bolts connecting the two formworks are located in the variable diameter protective tube. After the cast-in-place concrete is completed, the formworks on both sides of the cast-in-place concrete and the tension bolts and the variable diameter protective tube in the tension bolt holes are removed to form tension bolt holes with a variable diameter structure.

[0009] Furthermore, the end of the variable diameter protection pipe with a smaller diameter is fixedly connected to the inner side of the inner wall formwork, and the end of the variable diameter protection pipe with a larger diameter is fixedly connected to the inner side of the outer wall formwork.

[0010] Furthermore, during the installation of the two templates, both ends of the variable diameter protection pipe are in contact with the inner side surfaces of the two templates respectively.

[0011] Furthermore, the inner wall of the tension bolt hole is roughened before placing the sealing plate.

[0012] Furthermore, when placing the sealing plate, a sealing material layer is applied to the side wall of the annular groove or a sealing waterproof strip is provided, and then the sealing plate is placed in the annular groove so that one side of the sealing plate contacts the sealing material layer or the sealing waterproof strip.

[0013] A cast-in-place concrete tension bolt hole sealing device comprises a sealing plate and a sealing ring, wherein a through hole for bolt connection is provided in the middle of the sealing plate, and the sealing ring comprises two semicircular rings, which are spliced ​​together to form the sealing ring, wherein the outer ring diameter of the sealing ring is larger than the outer ring diameter of the sealing plate, the inner ring diameter of the sealing ring is smaller than the outer ring diameter of the sealing plate, the outer ring diameter of the sealing plate is smaller than the diameter of the tension bolt hole to be sealed, and the outer ring diameter of the sealing ring is larger than the diameter of the tension bolt hole to be sealed.

[0014] A cast-in-place concrete tension bolt hole sealing device comprises a first sealing plate, a second sealing plate and a sealing ring, wherein the second sealing plate is provided with a through hole, a connecting bolt is fixed to the first sealing plate, one end of the connecting bolt can pass through the through hole on the second sealing plate and be connected by a nut, and the end face of the nut contacts the end face of one side of the second sealing plate; the sealing ring is an annular structure, comprising two semicircular rings, the two semicircular rings are spliced ​​to form the sealing ring, the outer ring diameter of the first sealing plate is larger than the outer ring diameter of the second sealing plate, the outer ring diameter of the sealing ring is larger than the outer ring diameter of the second sealing plate, and the inner ring diameter of the sealing ring is smaller than the outer ring diameter of the second sealing plate.

[0015] Furthermore, a gasket is provided between the nut and the second sealing plate.

[0016] Furthermore, the outer ring diameter of the second sealing plate is smaller than the maximum diameter of the small diameter annular groove on the wall of the tension bolt hole, the outer ring diameter of the sealing ring is larger than the maximum diameter of the small diameter annular groove on the wall of the tension bolt hole, the outer ring diameter of the first sealing plate is smaller than the maximum diameter of the large diameter annular groove on the wall of the tension bolt hole, and the outer ring diameter of the first sealing plate is larger than the minimum diameter of the large diameter annular groove on the wall of the tension bolt hole.

[0017] Furthermore, the first sealing plate is a conical structure.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] The present invention discloses a method for sealing a tension bolt hole of cast-in-place concrete. The method comprises the following steps: cutting two annular grooves spaced apart along the inner circumference of the tension bolt hole wall in the tension bolt hole wall, and then placing a sealing plate in each of the two annular grooves. The end faces of the sealing plates in the annular grooves can contact the side walls of the annular grooves in which they are located. The two sealing plates are then fastened and connected along the axial direction of the tension bolt hole. Finally, slurry is sealed and filled on the outer sides of the two sealing plates to be flush with the outer wall surface and the inner wall surface of the cast-in-place concrete respectively. The sealing plate structure cooperates with the end of the annular groove to form a sealed space in the tension bolt hole, and the two ends of the tension bolt hole are separated, so as to effectively prevent leakage of the tension bolt hole of the cast-in-place concrete structure.

[0020] Furthermore, during the installation of the two formworks for pouring cast-in-place concrete, a variable-diameter protective tube is pre-embedded at the designed position of the tension bolts, the variable-diameter protective tube is located between the two formworks, and the tension bolts connecting the two formworks are located in the variable-diameter protective tube. After the cast-in-place concrete is completed, the formworks on both sides of the cast-in-place concrete and the tension bolts and variable-diameter protective tubes in the tension bolt holes are removed to form tension bolt holes with a variable-diameter structure. The variable-diameter structure is adopted to facilitate grooving and sealing. The end with a small diameter of the variable-diameter protective tube is fixed adjacent to the inner side of the inner wall formwork, and the end with a large diameter is fixed adjacent to the inner side of the outer wall formwork, forming a tension bolt hole with a conical structure, which can effectively prevent leakage and backflow of the outer wall.

[0021] Furthermore, during the installation of the two templates, the two ends of the variable diameter protection tube are in contact with the inner side surfaces of the two templates respectively, which can ensure that a stable structure is formed for the tension bolt holes.

[0022] Furthermore, the inner wall of the tension bolt hole is roughened before placing the sealing plate, which is conducive to the combination of the slurry with the inner wall of the tension bolt hole during the sealing filling process.

[0023] Furthermore, when placing the sealing plate, a sealing material layer is applied to the side wall of the annular groove or a sealing water-stop strip is set, and then the sealing plate is placed in the annular groove so that one side of the sealing plate is in contact with the sealing material layer or the sealing water-stop strip, and the sealing strip is used to seal, thereby improving the sealing between the sealing plate and the annular groove.

[0024] The present invention discloses a plugging device for cast-in-place concrete tension bolt holes. The plugging and sealing structure is formed by a first sealing plate, a second sealing plate and a sealing ring. The second sealing plate is provided with a through hole. A connecting bolt is fixed to the first sealing plate. One end of the connecting bolt can pass through the through hole on the second sealing plate and be connected by a nut. The end face of the nut contacts the end face of one side of the second sealing plate. The sealing ring is an annular structure, including two semicircular rings. The two semicircular rings are spliced ​​to form the sealing ring. The outer ring diameter of the first sealing plate is larger than the outer ring diameter of the second sealing plate. The outer ring diameter of the sealing ring is larger than the outer ring diameter of the second sealing plate. The inner ring diameter of the sealing ring is smaller than the outer ring diameter of the second sealing plate. The second sealing plate and the sealing ring cooperate to form a sealing structure with stable structure. The sealing plate structure cooperates with the end of the annular groove to form a sealed space in the tension bolt hole, and the two ends of the tension bolt hole are separated, which can effectively prevent the leakage of the tension bolt hole of the cast-in-place concrete structure.

[0025] Furthermore, a gasket is provided between the nut and the second sealing plate, thereby improving the connection sealing stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of a blocking device in an embodiment of the present invention.

[0027] Figure 2 It is a schematic diagram of the installation structure of the blocking device in an embodiment of the present invention.

[0028] Figure 3 Schematic diagram of the slotting structure in an embodiment of the present invention.

[0029] Figure 4 It is a schematic diagram of the structure of the variable diameter protection pipe in the plugging process in an embodiment of the present invention.

[0030] Figure 5 Schematic diagram of the sealing structure of medium diameter bolt holes in an embodiment of the present invention.

[0031] Among them, 1-variable diameter protection pipe, 2-first annular groove, 3-second annular groove, 4-tension bolt hole sealing device, 5-first sealing plate, 6-connecting bolts, 8-second sealing plate, 9-gasket, 10-nut, 11-sealing ring, A-waterstop strip, B-expansive waterproof mortar, C-mesh, D-polyurethane waterproof coating. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0033] A method for sealing a cast-in-place concrete tension bolt hole comprises the following steps:

[0034] Step 1) During the installation of the two templates for pouring cast-in-place concrete, a variable diameter protective pipe with a variable diameter is pre-buried at the design position of the tension bolts. The variable diameter protective pipe is located between the two templates, and the two ends of the variable diameter protective pipe are respectively in contact with the inner side surfaces of the two templates. The tension bolts connecting the two templates are located in the variable diameter protective pipe; Figure 4 As shown;

[0035] The variable diameter protection pipe adopts PVC pipe, which has a conical structure and the cross section along its axis is an isosceles trapezoid.

[0036] The end with a smaller diameter of the variable diameter protective pipe is fixed adjacent to the inner side of the inner wall formwork, and the end with a larger diameter is fixed adjacent to the inner side of the outer wall formwork. The variable diameter protective pipe adopts a variable diameter pipe structure, and the end with a smaller diameter is fixed adjacent to the inner side of the inner wall formwork. On the one hand, it is convenient to take out the variable diameter protective pipe for recycling after the two formworks are removed. On the other hand, it can make the slope of the tension bolt hole slope from the inside to the outside of the cast-in-place concrete to prevent water backflow.

[0037] During the installation process, the axis of the variable diameter protective pipe is perpendicular to the plane where the two templates are located, which is conducive to the accuracy of the embedded position and ensures that the tension bolts supporting and fixing the template are evenly stressed and tightened.

[0038] Step 2), after the cast-in-place concrete is completed, the templates on both sides of the cast-in-place concrete and the tension bolts and the variable diameter protection tube in the tension bolt hole are removed, and two annular grooves are cut in the wall of the tension bolt hole along the inner circumference of the tension bolt hole wall. The two annular grooves are spaced apart along the axial direction of the tension bolt hole. The slotted structure is as follows: Figure 3 As shown;

[0039] Specifically, the present application has two annular grooves cut in the wall of the tension bolt hole along the inner circumference of the tension bolt hole wall, each with a depth of 10 mm and a width of 10 mm; Figure 1 As shown, the two annular grooves are respectively a first annular groove 2 and a second annular groove 3 , and the diameter of the first annular groove 2 is smaller than the diameter of the second annular groove 3 .

[0040] Step 3) After the annular grooves are excavated, a sealing plate is placed in each of the two annular grooves, and the end face of the sealing plate located in the annular groove can contact the side wall of the annular groove. Then the two sealing plates are axially fastened and connected along the tension bolt holes to form a sealing structure. Then, the slurry sealing is filled on the outside of the two sealing plates to be flush with the outer wall and inner wall of the cast-in-place concrete respectively.

[0041] Specifically, the inner wall of the tension bolt hole is roughened before placing the sealing plate;

[0042] The present application adopts a reducing protective tube of a reducing tube, and the tension bolt hole formed is a reducing hole along the axial direction. Therefore, the two annular grooves opened on the inner wall of the tension bolt hole have different diameters. When placing the sealing plate, a sealing material layer is applied to the side wall of the annular groove or a sealing water-stop strip is set, and then the sealing plate is placed in the annular groove so that one side of the sealing plate is in contact with the sealing material layer or the sealing water-stop strip.

[0043] Specifically, first, after sealing the waterproof strip in the small diameter annular groove, the first sealing plate is passed in from the outer wall side of the tension bolt hole, and then the two semicircular rings of the sealing ring are rotated and shrunk and placed in the small diameter annular groove, and stretched to form a complete ring in the small diameter annular groove, and then the sealing ring 11 is contacted with the end face of the small diameter annular groove, and is clamped on the side wall of the small diameter annular groove for preliminary fixation; then, after sealing the waterproof strip in the large diameter annular groove, the second sealing plate is passed in from the outer wall side of the tension bolt hole and the bolts on the second sealing plate are inserted into the through hole of the first sealing plate, and then the second sealing plate is clamped on the inner wall of the large diameter annular groove and fastened by nuts; the first sealing plate, the second sealing plate and the sealing waterproof strip A are successively clamped on the two annular grooves respectively, thereby achieving the purpose of double effective water interception, and then the two sealing plates are tightly fixed on the side wall of the annular groove by nuts, and integrated with the tension bolt hole to further improve the water interception effect.

[0044] After a 24-hour test of injecting water into the outer wall side of the tension bolt hole and finding no leakage, the inner wall hole and the outer wall hole are sealed with expansion waterproof mortar B respectively. When sealing the outer wall hole, it is necessary to fill the expansion waterproof mortar B, mesh C, and apply polyurethane waterproof coating D in sequence, and finally use the expansion waterproof mortar as the cover layer. Multiple waterproof measures ensure that the metal template tension bolt hole is sealed without leakage. The present invention adopts a pre-buried variable diameter protective pipe to form a slope inverted slope, and uses an annular groove structure to cooperate with a sealing plate to form an axial sealing structure. The two sealing plates form multiple waterproof and water interception measures to avoid the situation where water on the outer wall flows from the tension bolt hole to the inner wall and leaks. It is simple and easy to operate, and most importantly, it reduces the leakage rate of the outer wall caused by the tension bolt hole.

[0045] like Figure 5As shown, for the sealing of the tension bolt holes of the existing cylindrical diameter, a cast-in-place concrete tension bolt hole sealing device includes a sealing plate and a sealing ring 11, wherein a through hole for bolt connection is provided in the middle of the sealing plate, and the sealing ring 11 includes two semicircular rings, which are spliced ​​to form a sealing ring, the outer ring diameter of the sealing ring 11 is larger than the outer ring diameter of the sealing plate, the inner ring diameter of the sealing ring 11 is smaller than the outer ring diameter of the sealing plate, the outer ring diameter of the sealing plate is smaller than the diameter of the tension bolt hole to be sealed, and the outer ring diameter of the sealing ring 11 is larger than the diameter of the tension bolt hole to be sealed; when sealing, two annular grooves arranged at intervals are excavated in the tension bolt hole along the inner circumference of the tension bolt hole wall, so that the bottom diameter of the annular groove is larger than the outer ring diameter of the sealing ring 11, and then a sealing ring 11 is placed in each of the two annular grooves, and a sealing plate is placed at the outer end of the two sealing rings 11, and then the two sealing plates are fastened and connected by bolts.

[0046] like Figure 1 , Figure 2 As shown, a cast-in-place concrete tension bolt hole sealing device includes a first sealing plate 5, a second sealing plate 8 and a sealing ring 11. The second sealing plate 8 is provided with a through hole. A connecting bolt 3 is fixed to the first sealing plate 5. One end of the connecting bolt 3 can pass through the through hole on the second sealing plate 8 and is connected by a nut 10. The end face of the nut 10 contacts the end face of one side of the second sealing plate 8. The sealing ring 11 is an annular structure, including two semicircular rings, which are spliced ​​to form a sealing ring. The outer ring diameter of the first sealing plate 5 is larger than the outer ring diameter of the second sealing plate 8, the outer ring diameter of the sealing ring 11 is larger than the outer ring diameter of the second sealing plate 8, and the inner ring diameter of the sealing ring 11 is smaller than the outer ring diameter of the second sealing plate 8.

[0047] A gasket 9 is provided between the nut 10 and the second sealing plate 8. The first sealing plate 5 is a conical structure, and the large end surface of the conical structure contacts the end surface of the large diameter annular groove, which can prevent water seepage from the external wall.

[0048] During the plugging process, two annular grooves arranged at intervals are excavated in the tension bolt hole of the cast-in-place concrete along the inner circumference of the tension bolt hole wall, wherein the outer ring diameter of the second sealing plate 8 is smaller than the maximum diameter of the small diameter annular groove on the tension bolt hole wall, the outer ring diameter of the sealing ring 11 is larger than the maximum diameter of the small diameter annular groove on the tension bolt hole wall, the outer ring diameter of the first sealing plate 5 is smaller than the maximum diameter of the large diameter annular groove on the tension bolt hole wall, and the outer ring diameter of the first sealing plate 5 is larger than the minimum diameter of the large diameter annular groove on the tension bolt hole wall; during the plugging process, the large diameter end of the tension bolt hole is sealed. The second sealing plate 8 is placed in the small diameter annular groove in the wall of the tension bolt hole, and then the two semicircular rings of the sealing ring 11 are rotated and shrunk and then placed in the small diameter annular groove, and then expanded in the small diameter annular groove to form a complete ring, and then the sealing ring 11 is brought into contact with the end face of the small diameter annular groove, and the first sealing plate 5 is placed in the large diameter annular groove in the wall of the tension bolt hole from the large aperture end of the tension bolt hole, and then the two sealing plates are fastened and connected along the axial direction of the tension bolt hole to form a sealing structure, and then the slurry sealing is filled on the outside of the two sealing plates, flush with the outer wall and inner wall of the cast-in-place concrete respectively.

[0049] Alternatively, in the tension bolt holes of the existing cylindrical through-hole structure, two pairs of second sealing plates 8 and sealing rings 11 are used to cooperate and seal in two annular grooves.

Claims

1. A method for sealing a cast-in-place concrete tension bolt hole, characterized in that: The following steps are involved: Step 1), two annular grooves are excavated in the wall of the tension bolt hole along the inner circumference of the tension bolt hole wall, and during the installation process of the two templates for pouring cast-in-place concrete, a variable diameter protection pipe is embedded at the designed position of the tension bolt, the variable diameter protection pipe is located between the two templates, and the tension bolts connecting the two templates are located in the variable diameter protection pipe. After the cast-in-place concrete is completed, the templates on both sides of the cast-in-place concrete and the tension bolts and the variable diameter protection pipe in the tension bolt hole are removed to form a tension bolt hole with a variable diameter structure; Step 2), place a sealing plate in each of the two annular grooves, the end face of the sealing plate in the annular groove can contact the side wall of the annular groove, and then fasten the two sealing plates axially along the tension bolt holes. Finally, fill the slurry sealing on the outside of the two sealing plates, flush with the outer wall and inner wall of the cast-in-place concrete respectively; the end with a smaller diameter of the variable diameter protective pipe is fixed adjacent to the inner side of the inner wall formwork, and the end with a larger diameter is fixed adjacent to the inner side of the outer wall formwork; during the installation of the two formworks, the two ends of the variable diameter protective pipe are in contact with the inner side surfaces of the two formworks respectively.

2. A method for plugging cast-in-place concrete tension bolt holes according to claim 1, characterized in that: Before placing the cover plate, roughen the inner wall of the tension bolt hole.

3. A method for sealing a cast-in-place concrete tension bolt hole according to claim 1, characterized in that: When placing the sealing plate, a sealing material layer is applied to the side wall of the annular groove or a sealing waterproof strip is provided, and then the sealing plate is placed in the annular groove so that one side of the sealing plate contacts the sealing material layer or the sealing waterproof strip.

4. A cast-in-situ concrete tension bolt hole plugging device used in the cast-in-situ concrete tension bolt hole plugging method according to claim 1, characterized in that: The invention comprises a first sealing plate (5), a second sealing plate (8) and a sealing ring (11), wherein the second sealing plate (8) is provided with a through hole, a connecting bolt (3) is fixed to the first sealing plate (5), one end of the connecting bolt (3) can pass through the through hole on the second sealing plate (8) and be connected via a nut (10), and an end face of the nut (10) contacts an end face of one side of the second sealing plate (8); the sealing ring (11) is an annular structure, comprising two semicircular rings, the two semicircular rings are spliced ​​to form a sealing ring, the outer ring diameter of the first sealing plate (5) is larger than the outer ring diameter of the second sealing plate (8), the outer ring diameter of the sealing ring (11) is larger than the outer ring diameter of the second sealing plate (8), and the inner ring diameter of the sealing ring (11) is smaller than the outer ring diameter of the second sealing plate (8).

5. The cast-in-place concrete tension bolt hole sealing device according to claim 4, characterized in that: The outer ring diameter of the second sealing plate (8) is smaller than the maximum diameter of the small diameter annular groove on the wall of the tension bolt hole, the outer ring diameter of the sealing ring (11) is larger than the maximum diameter of the small diameter annular groove on the wall of the tension bolt hole, the outer ring diameter of the first sealing plate (5) is smaller than the maximum diameter of the large diameter annular groove on the wall of the tension bolt hole, and the outer ring diameter of the first sealing plate (5) is larger than the minimum diameter of the large diameter annular groove on the wall of the tension bolt hole.

6. The cast-in-place concrete tension bolt hole plugging device according to claim 4, characterized in that: The first sealing plate (5) is a conical structure, and a gasket (9) is provided between the nut (10) and the second sealing plate (8).

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