Construction method for deformation joint of outer wall of high-rise building
Through the pull-up connection method of the hanging ring bolt casing and the main keel of the exterior wall, combined with the sealing process of rubber plugs and polyurethane foaming agent, the problem of floating and sealing of EPS/XPS plates in the construction of deformed joints is solved, the construction quality and waterproofing effect are improved, and the cost is reduced.
Patent Information
- Application Number
- CN202510834030.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-20
- Publication Date
- 2025-07-25
AI Technical Summary
The existing cross-layer casting and simultaneous casting construction methods are likely to cause EPS/XPS plates to float or squeeze in during the deformed joints of the exterior wall of high-rise buildings, affecting the quality of concrete forming, and the thickness of the steel bar protective layer is difficult to ensure.
The pull-on connection method of the suspension ring bolt casing and the main keel of the exterior wall is used to initially fix the deformation joint template, and the final reinforcement is achieved through the tightening of the suspension ring bolt nuts, and the sealing is combined with rubber plugs and polyurethane foaming agent to ensure the integrity of the deformation joint and waterproof effect.
The construction quality of deformed joints is improved, the rubber plug is prevented from falling off, the sealing effect is enhanced, the construction cost is reduced, and problems are discovered in a timely manner through water shower tests to ensure the construction quality.
Smart Images
Figure CN120367384A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of construction joints, and particularly to a construction method for construction joints of high-rise building exterior walls. Background Art
[0002] There are mainly two traditional construction methods for construction joint formwork: stepped casting and simultaneous casting. In stepped casting, first, the formwork of one side wall is reinforced. After the concrete is poured, the steel bars of the other side wall are tied, and the adjacent room wall is tied. At this time, the construction joint formwork is not erected, and EPS board or XPS board is stuffed into the construction joint, and then the concrete is poured; in simultaneous casting, this method requires the formwork of the adjacent room surface of the walls on both sides of the construction joint to be reinforced, while the formwork of the construction joint is not reinforced, and EPS board or XPS board is filled.
[0003] Stepped casting is the mainstream currently in use. Although this method is simple, due to the relatively large lateral pressure at the root of the concrete wall and the relatively small density of the EPS (XPS) board, extrusion is likely to occur, resulting in the floating of the EPS (XPS) board. Furthermore, the concrete walls at least 200 mm high at the root of the concrete wall are connected, affecting the normal function of the construction joint and having a certain impact on the building structure; in addition, the extrusion of the concrete will directly lead to difficulty in ensuring the thickness of the steel bar protection layer.
[0004] In simultaneous casting during the concrete pouring process, it is required that the shear walls of the outer walls on both sides be poured simultaneously at the same speed and in the same volume. If one side wall is poured too fast, it will cause the EPS (XPS) board to be squeezed into the other side wall, resulting in distortion and formwork bulging, seriously affecting the quality of the formed concrete of the construction joint, and the EPS (XPS) board is fragile, and the garbage after fragmentation is difficult to clean up. Summary of the Invention
[0005] The technical problem to be solved by the present invention is that the existing stepped casting and simultaneous casting construction methods both have defects, seriously affecting the quality of the formed concrete of the construction joint.
[0006] To solve the above problems, the present invention provides a construction plan that can improve the construction efficiency and quality of the construction joint. The specific plan is as follows: A construction method for construction joints of high-rise building exterior walls, comprising the following steps: Step 1: Position and set out the construction joint shear wall at a position close to the construction joint plate surface. After the positioning and setting out are completed, tie the steel bars of the construction joint wall columns.
[0007] Step 2: Pre-fabricate a lifting ring bolt sleeve. The front end of the lifting ring bolt sleeve is a reduced-diameter opening. Open a first through hole on the construction joint formwork that matches the size of the front end of the lifting ring bolt sleeve. Insert the construction joint formwork inside the steel bars of the construction joint wall columns on both sides. Subsequently, open a second through hole on the room walls on both sides of the construction joint corresponding to the positions of the through holes; Step 3: In the rooms on both sides of the deformation joint, insert the eyebolt sleeve into the corresponding first through-hole from the second through-hole, so that the front end of the eyebolt sleeve is stuck in the first through-hole; Step 4: Pass the eyebolt through the eyebolt sleeve in the rooms on both sides of the deformation joint, so that the eyebolt on the eyebolt passes through the first through-hole and extends to the position of the deformation joint; Step 5: Insert multiple main external wall keels downward from above the position of the deformation joint, so that each main external wall keel passes through the eyebolt of at least one eyebolt, and the bent part of the main external wall keel is placed on the top of the deformation joint formwork; Step 6: Screw the nut onto the eyebolt in the rooms on both sides. As the nut is gradually tightened, the main external wall keel drives the deformation joint formwork to gradually approach the deformation joint wall column steel bars until the distance between the two deformation joint formworks is the same as the width of the set-out deformation joint; Step 7: Pour concrete into the deformation joint shear wall formwork so that the concrete wraps the deformation joint wall column steel bars to form a deformation joint shear wall; Step 8: After the concrete of the deformation joint shear wall reaches the formwork removal condition, remove the nut, the main external wall keel, the eyebolt, and the deformation joint formwork in sequence, ream the inner wall bolt holes of the shear wall, and clean the residual mortar in the holes; Step 9: Insert the small head of the prefabricated rubber plug outward from the inner wall side into the reduced-diameter part of the eyebolt sleeve. The rubber plug is in a conical structure, the size of its large head is slightly larger than the size of the reduced-diameter opening, and it is made of alkali-resistant rubber material; Step 10: Inject polyurethane foam agent into the bolt holes of the shear wall from the inner wall to the outer wall, and reserve a waterproof mortar filling layer at the inner end; Step 11: Fill the waterproof mortar filling layer in two layers tightly. After the first layer sets and dries, perform secondary filling and smooth it to the wall surface layer; Step 12: Conduct an external wall water spraying test. Potential problems can be discovered in time through the water spraying test, and remedial measures can be implemented as early as possible to ensure the construction quality.
[0008] The present invention adopting the above technical solution, compared with the prior art, has the beneficial effects that: The construction method of the present invention is that the formwork of the shear wall at the deformation joint is reinforced by tension connection with the help of hanger bolts. At the deformation joint, for the external wall, the main keel of the external wall is inserted into the hanger bolts in a way of tension hanger to preliminarily fix the formwork of the deformation joint; subsequently, by tightening the nuts of the hanger bolts in the room, the reinforcement of the shear wall formwork is realized; during the process of tightening the nuts, the hanger drives the main keel of the external wall to gradually approach the shear wall formwork, and then makes the shear wall formwork move closer inward until it reaches the width required by the design and specifications. At this time, the formwork of the deformation joint is finally reinforced by the hanger bolts; through the reduced-diameter structure of the hanger bolt sleeve, the problem that the rubber plug falls off from the front end of the external wall sleeve when being inserted from the internal wall is effectively prevented, and the technical problem that it is difficult to effectively seal the outside of the bolt hole of the external wall at the deformation joint due to space limitation is successfully solved, improving the sealing effect; the present invention adopts the method of integrally installing and pouring the deformation joint, which not only improves the quality of the project entity, but also greatly saves the construction cost. In addition, the bolt holes of the external wall are sealed by a composite construction process of rubber plugs, foaming agents and mortar layers. After actual detection and verification, the waterproof effect is remarkable, successfully achieving the preset design goal.
[0009] As a preferred embodiment, a further technical solution of the present invention is: The hanger bolt sleeve includes a straight pipe and a reduced-diameter joint. The straight pipe and the reduced-diameter joint are connected by an adhesive. The front end of the reduced-diameter joint is a reduced-diameter port that tapers forward. The diameter of the hanger of the hanger bolt is smaller than the minimum diameter of the reduced-diameter port, and the large-head size of the rubber plug is slightly larger than the size of the reduced-diameter port.
[0010] Multiple groups of first through holes are provided on the formwork of the deformation joint. The vertical intervals of each group of first through holes are arranged, and the intervals between the first through holes in the same group are equal.
[0011] The main keel of the external wall is a prefabricated part. The length of the vertical part of the main keel of the external wall is made according to the height of the formwork of the deformation joint. The bent part of the main keel of the external wall is larger than the width of the formwork of the deformation joint. Each group of first through holes is connected in series by a main keel of the external wall.
[0012] The formwork of the deformation joint adopts an integral steel formwork. Description of the Drawings
[0013] Figure 1 is the construction schematic diagram of the embodiment of the present invention; Figure 2 is the structural schematic diagram of the hanger bolt sleeve of the embodiment of the present invention; Figure 3 is the structural schematic diagram of the rubber plug of the embodiment of the present invention; Figure 4 is the relative state schematic diagram of the hanger bolt and the hanger bolt sleeve of the embodiment of the present invention.
[0014] In the figure: 1. Bent part; 2. Main exterior wall keel; 3. Shear wall of deformation joint; 4. Formwork of deformation joint; 5. Hoisting ring bolt; 51. Hoisting ring; 52. Nut; 53. Threaded screw rod; 6. Sleeve of hoisting ring bolt; 61. Reducing joint; 62. Straight pipe; 63. Reduced diameter opening; 7. Rubber plug. Specific implementation manner
[0015] The present invention will be further described below in conjunction with embodiments. The purpose is only to better understand the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.
[0016] See appendix Figures 1-4 , the embodiment of the present invention discloses a construction method for a deformation joint of a high-rise building exterior wall, including the following steps: Step 1: Position and set out the shear wall of the deformation joint at a position close to the deformation joint board surface. After completing the positioning and setting out, bind the steel bars of the wall columns of the deformation joint. Step 2: Pre-manufacture the sleeve 6 of the hoisting ring bolt and the formwork 4 of the deformation joint. The front end of the sleeve 6 of the hoisting ring bolt is a reduced diameter opening 63. The formwork 4 of the deformation joint is improved to Q235 steel, mainly composed of two parts: a 4-mm-thick steel plate and a 40 mm × 40 mm × 2.5-mm square steel. Hoisting ears are provided at both ends 500 mm from the top of the side of the formwork 4 of the deformation joint for convenient hoisting. A first through hole with a 45-mm aperture matching the size of the front end of the sleeve 6 of the hoisting ring bolt is opened on the formwork 4 of the deformation joint. Holes are opened at positions 350 mm from the top end and 200 mm from the end on both sides of the top of the formwork 4 of the deformation joint, and holes are opened at positions 50 mm from the bottom and 200 mm from the end on both sides of the bottom of the formwork 4 of the deformation joint. Insert and place the formwork 4 of the deformation joint inside the steel bars of the wall columns of the deformation joint on both sides, and then open second through holes on the room walls on both sides of the deformation joint corresponding to the positions of each through hole. Step 3: Prefabricate the lifting ring bolt sleeve 6 and the lifting ring bolt 5. The lifting ring bolt sleeve 6 includes a straight pipe 62 and a reducing joint 61. The straight pipe 62 is a PVC pipe with an outer diameter of 50 mm and a wall thickness of 2 mm; the reducing joint 61 is a PVC reducing joint 61 with dimensions of 50 mm * 40 mm. The straight pipe 62 and the reducing joint 61 are connected by an adhesive to ensure the firmness and tightness of the connection part; the total length of the sleeve is 300 mm (the thickness of the building exterior wall is 200 mm); the front end of the reducing joint 61 is a reducing port 63 that tapers forward, and the minimum diameter of the reducing port 63 is 40 mm; the lifting ring bolt 5 is composed of a lifting ring 51, a threaded screw rod 53, a flat washer, and a nut 52, all made of stainless steel; the outer diameter of the lifting ring 51 is 34 mm, the inner diameter of the lifting ring 51 is 21 mm, the diameter of the threaded screw rod 53 is 14 mm, and the length is selected according to the wall thickness. After reinforcement, the exposed length of the threaded screw rod 53 is not less than 100 mm; the nut 52 and the flat washer are used in combination with the threaded screw rod 53. Therefore, the diameter of the lifting ring 51 of the lifting ring bolt 5 is smaller than the minimum diameter of the reducing port 63. In the rooms on both sides of the deformation joint, insert the lifting ring bolt sleeve 6 from the second through hole into the corresponding first through hole, so that the front end of the lifting ring bolt sleeve 6 is stuck in the first through hole; Step 4: Insert the lifting ring bolt 5 into the lifting ring bolt sleeve 6 in the rooms on both sides of the deformation joint, so that the lifting ring on the lifting ring bolt 5 passes through the first through hole and extends to the position of the deformation joint; Step 5: Insert multiple exterior wall main keels 2 from above the position of the deformation joint, so that each exterior wall main keel 2 passes through the lifting ring of at least one lifting ring bolt 5, and the bent part 1 of the exterior wall main keel 2 is placed on the top of the deformation joint formwork 4; Step 6: Screw the nut 52 onto the lifting ring bolt 5 in the rooms on both sides. As the nut 52 is gradually tightened, the exterior wall main keel 2 drives the deformation joint formwork 4 to gradually approach the deformation joint wall column steel bars, so that the deformation joint formwork 4 is closely attached to the deformation joint wall column steel bars until the distance between the two deformation joint formworks 4 is the same as the width of the set-out deformation joint; Step 7: Pour concrete into the deformation joint shear wall formwork, so that the concrete wraps the deformation joint wall column steel bars to form the deformation joint shear wall 3; Step 8: After the concrete of the deformation joint shear wall 3 reaches the formwork removal condition, remove the nut 52, the exterior wall main keel 2, the lifting ring bolt 5, and the deformation joint formwork 4 in sequence, and remove the reducing joint 61 of the lifting ring bolt 5, and perform reaming treatment on the bolt holes on the inner side of the shear wall to clean the residual mortar in the holes; Step 9: Prefabricate a rubber plug 7. The rubber plug 7 is matched with the size of the reducing port 63. The rubber plug 7 is conical, made of alkali-resistant rubber, with a top diameter of 45 mm, a height of 30 mm, and a bottom diameter of 33 mm. Place the small end of the prefabricated rubber plug 7 facing outward and insert it into the reducing part of the lifting ring bolt sleeve 6 from the inner wall side; Step Ten: Inject polyurethane foam agent into the bolt holes of the shear wall from the inner wall to the outside, and reserve a waterproof mortar filling layer at the inner end. Step Eleven: Fill the waterproof mortar filling layer in two layers tightly. Inject waterproof mortar into the mortar filling layer. After the first layer of waterproof mortar begins to set and dry, conduct secondary grouting and smooth it to the wall surface layer. Step Twelve: Conduct a water spraying test on the exterior wall. Timely discover potential problems through the water spraying test, implement remedial measures as early as possible, and ensure the construction quality.
[0017] In this embodiment, a plurality of groups of first through holes are opened on the deformation joint formwork 4. The vertical intervals of each group of first through holes are provided, and the intervals between the first through holes in the same group are equal.
[0018] In this embodiment, the exterior wall main keel 2 is a prefabricated part. The exterior wall main keel 2 is made of round steel with a diameter of φ16, and the top is bent at 90°. The vertical part length of the exterior wall main keel 2 is made according to the height of the deformation joint formwork 4. The length of the bent part 1 of the exterior wall main keel 2 is greater than the width of the deformation joint formwork 4 and not less than 100 mm. Each first through hole in the same group is connected in series by an exterior wall main keel 2.
[0019] In the construction method of the present invention, the deformation joint formwork 4 of the deformation joint shear wall is connected by tensioning with the inner formwork through the lifting ring bolts 5. At the deformation joint position, the exterior wall main keel 2 passes through the tensioning lifting rings of the lifting ring bolts 5 to preliminarily fix the exterior wall to the lifting ring bolts. Subsequently, when tightening the nuts 52 in the room, the formwork 4 of the shear wall is reinforced. During the process of tightening the nuts, the lifting rings of the lifting ring bolts 5 drive the exterior wall main keel 2 to gradually approach the formwork 4 of the shear wall, thereby causing the formwork 4 of the shear wall to move inward until the width required by the design and specifications is reached. At this time, the deformation joint formwork 4 is finally reinforced through the lifting ring bolts. Through the reduced diameter structure of the lifting ring bolt sleeve 6, the problem that the rubber plug 7 falls off from the front end of the exterior wall when being inserted from the inner wall is effectively prevented, and the technical problem that it is difficult to effectively seal the outside of the bolt holes of the exterior wall of the deformation joint due to space limitations is successfully solved, improving the sealing effect. The present invention adopts an integrated installation and pouring method for the deformation joint, which not only improves the quality of the project entity but also greatly saves the construction cost. In addition, the bolt holes of the exterior wall are sealed by a composite construction process of rubber plugs 7, foaming agents, and waterproof mortar. Through actual detection and verification, its waterproof effect is remarkable, and the preset design goal is successfully achieved.
[0020] The above are only the preferred and feasible embodiments of the present invention, and do not limit the scope of rights of the present invention accordingly. All equivalent changes made by using the content of the specification and drawings of the present invention are included within the scope of rights of the present invention.
Claims
1. A construction method for deformation joints on the outer walls of high-rise buildings, characterized in that, It includes the following steps: Step 1: Position and lay out the deformation joint shear wall near the slab surface of the deformation joint. After completing the positioning and layout, bind the steel bars of the deformation joint wall columns; Step 2: Pre-fabricate the lifting ring bolt sleeves. The front end of the lifting ring bolt sleeve is a reduced-diameter opening. Open a first through hole on the deformation joint formwork that matches the size of the front end of the lifting ring bolt sleeve. Insert the deformation joint formwork into the inner sides of the steel bars of the deformation joint wall columns on both sides. Subsequently, open a second through hole on the room walls on both sides of the deformation joint corresponding to the positions of the through holes; Step 3: In the rooms on both sides of the deformation joint, insert the lifting ring bolt sleeves from the second through holes into the corresponding first through holes, so that the front end of the lifting ring bolt sleeve is stuck in the first through hole; Step 4: Pass the lifting ring bolts through the lifting ring bolt sleeves in the rooms on both sides of the deformation joint, so that the lifting rings on the lifting ring bolts pass through the first through holes and extend to the deformation joint position; Step 5: Insert multiple main external wall keels downward from above the deformation joint position, so that each main external wall keel passes through the lifting ring of at least one lifting ring bolt, and the bent part of the main external wall keel is placed on the top of the deformation joint formwork; Step 6: Screw nuts onto the lifting ring bolts in the rooms on both sides. As the nuts are gradually tightened, the main external wall keels drive the deformation joint formwork to gradually approach the steel bars of the deformation joint wall columns until the distance between the two deformation joint formworks is the same as the width of the laid-out deformation joint; Step 7: Pour concrete into the deformation joint shear wall formwork, so that the concrete wraps the steel bars of the deformation joint wall columns to form the deformation joint shear wall; Step 8: After the concrete of the deformation joint shear wall reaches the form removal condition, remove the nuts, main external wall keels, lifting ring bolts, and deformation joint formwork in sequence, and perform reaming treatment on the bolt holes on the inner side of the shear wall, and clean the residual mortar in the holes; Step 9: Insert the small end of the prefabricated rubber plug outward from the inner wall side into the reduced-diameter part of the lifting ring bolt sleeve. The rubber plug is in a conical structure, the size of its large head is slightly larger than the size of the reduced-diameter opening, and it is made of alkali-resistant rubber material; Step 10: Inject polyurethane foam agent into the bolt holes of the shear wall from the inner wall to the outside, and reserve a waterproof mortar filling layer at the inner end; Step 11: Fill the waterproof mortar filling layer in two layers tightly. After the first layer sets and dries, perform secondary filling and smooth it to the wall surface layer; Step 12: Conduct an external wall water spray test. Timely discover potential problems through the water spray test, implement remedial measures as early as possible, and ensure the construction quality.
2. The construction method of the deformation joint on the exterior wall of a high-rise building according to claim 1, wherein: The lifting ring bolt sleeve includes a straight pipe and a reducing joint. The straight pipe and the reducing joint are connected by an adhesive. The front end of the reducing joint is a reducing opening that reduces in diameter forward. The diameter of the lifting ring of the lifting ring bolt is smaller than the minimum diameter of the reducing opening, and the rubber plug has the same size as the reducing opening.
3. The construction method of the deformation joint on the exterior wall of a high-rise building according to claim 1, wherein: Multiple groups of first through holes are opened on the deformation joint formwork. The vertical spacing of each group of first through holes is opened, and the spacing between the first through holes in the same group is equal.
4. The construction method of the expansion joint of the high-rise building exterior wall according to claim 3, wherein: The main external wall keel is a prefabricated part. The length of the vertical part of the main external wall keel is made according to the height of the deformation joint formwork. The bent part of the main external wall keel is larger than the width of the deformation joint formwork. Each first through hole in the same group is connected in series by a main external wall keel.
5. The construction method of the expansion joint of the high-rise building exterior wall according to claim 1, characterized in that: The deformation joint formwork adopts an integrated steel formwork.