Construction method for preventing slurry leakage at connection nodes between horizontal precast components and cast-in-place structures

Abstract

The present invention relates to the field of building construction, and specifically to a construction method for preventing slurry leakage at the connection node between a horizontal precast member and a cast-in-place structure, including: manufacturing a liquid bladder and manufacturing a supporting plate according to the size of the liquid bladder, and arranging adjustable supports at the bottom surface of the supporting plate; placing the liquid bladder on the supporting plate, and lifting the liquid bladder to a position slightly lower than the upper side edge of the cast-in-place structure formwork through the adjustable supports, with the horizontal side edge of the supporting plate abutting against the cast-in-place structure formwork; after the horizontal precast member is in place, continuously lift the liquid bladder through the adjustable supports so as to squeeze the liquid bladder at the internal corner position, and seal the joint between the cast-in-place structure formwork and the horizontal precast member through the liquid bladder, thereby avoiding slurry leakage at the joint. Using the liquid bladder to seal the joint at the internal corner position between the cast-in-place structure formwork and the horizontal precast member can effectively improve the tightness of the connection part, ensure that there is no slurry leakage between the horizontal precast member and the cast-in-place structure formwork, solve the phenomenon of reduction in the physical properties of concrete caused by slurry leakage, and ensure the subsequent durability of the concrete.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and particularly to a construction method for preventing slurry leakage at the connection node between a horizontal precast member and a cast-in-place structure. Background Art

[0002] Currently, when constructing the joint between a horizontal precast member and a cast-in-place structure, such as a cast-in-place wall or a cast-in-place beam, there are mainly two methods for preventing slurry leakage: one is to paste a sponge strip on the upper side of the formwork before lapping the horizontal precast member on the formwork of the cast-in-place structure. However, since the reinforcement system of the cast-in-place structure and the support system of the precast member are not related to each other, the precast member cannot exert a certain pressure on the formwork, resulting in the sponge strip not being effectively extruded and poor anti-leakage effect at the joint; the other is to set a sealing formwork strip at the joint between the precast member and the cast-in-place structure. However, due to the formwork being mostly made of semi-rigid materials and the problem of the manufacturing precision of the precast member itself, there are still gaps between the precast member and the cast-in-place structure, resulting in slurry leakage. If slurry leakage occurs between the precast member and the cast-in-place structure, it will directly affect the durability of the structure. In addition, the leakage of concrete slurry will largely affect the physical properties of the concrete and reduce the reliability of the structure. Summary of the Invention

[0003] In view of the above problems, an embodiment of the present invention provides a construction method for preventing slurry leakage at the connection node between a horizontal precast member and a cast-in-place structure.

[0004] The construction method for preventing slurry leakage at the connection node between a horizontal precast member and a cast-in-place structure provided by the embodiment of the present invention includes:

[0005] Set up the formwork of the cast-in-place structure according to the construction design requirements, and determine the length of the internal corner position between the upper side of the cast-in-place structure formwork and the horizontal precast member;

[0006] Manufacture a liquid bag according to the determined length, and manufacture a support plate with an L-shaped cross-section according to the size of the liquid bag, and set adjustable supports on the bottom surface of the support plate;

[0007] Place the liquid bag on the support plate, and lift the liquid bag to a position slightly lower than the upper side edge of the cast-in-place structure formwork through the adjustable support, and at the same time, the horizontal side of the support plate abuts against the cast-in-place structure formwork;

[0008] Complete the construction and positioning of the horizontal precast member according to the conventional process, and continue to lift the liquid bag through the adjustable support to squeeze the liquid bag at the internal corner position, and seal the joint between the cast-in-place structure formwork and the horizontal precast member through the liquid bag to avoid slurry leakage at the joint.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: By using a liquid bladder to seal the joint between the formwork of the cast-in-place structure and the horizontal precast member, the tightness of the connection part can be effectively improved, ensuring that there is no leakage of mortar between the horizontal precast member and the formwork of the cast-in-place structure, solving the phenomenon of reduced physical properties of concrete caused by mortar leakage, and ensuring the subsequent durability of the concrete.

[0010] Optionally, after the formwork of the cast-in-place structure is erected, according to the position where the adjustable support is to be erected, a counterbore is opened on the formwork of the cast-in-place structure, and a hook bolt is inserted through the counterbore;

[0011] Correspondingly, during the process of continuously lifting the liquid bladder by the adjustable support, the hook at one end of the hook bolt is hooked to the adjustable support, and a certain pulling force is applied to the adjustable support by screwing the locking nut at the other end, thereby enhancing the extrusion strength of the liquid bladder at the internal corner position.

[0012] Optionally, the hook bolt includes an intermediate section whose length is adapted to the width of the cast-in-place structure. Rubber mortar plugs are sleeved at both ends of the intermediate section. An external thread is provided at the first end of the intermediate section and a hook is connected through the external thread. An internal thread is provided at the second end and a screw rod is connected through the internal thread. A backing plate and a locking nut are provided on the screw rod;

[0013] During the process of inserting the hook bolt through the counterbore, the intermediate section is inserted into the counterbore, and the rubber mortar plugs are sleeved at both ends of the intermediate section. At the same time, the rubber mortar plugs are stuffed into the gap between the hook bolt and the counterbore for sealing; at the first end of the intermediate section close to the adjustable support, the hook is screwed in until the hook abuts against the outer side of the adjustable support, and the screw rod is screwed into the second end, and the backing plate and the locking nut are sequentially arranged on the screw rod, and the backing plate abuts against the rubber mortar plug.

[0014] Optionally, the rubber mortar plug is frustum-shaped.

[0015] Optionally, the cross-section of the liquid bladder is rectangular, the width of the liquid bladder is not less than the width of the support plate, and the height of the liquid bladder is greater than the height of the support plate.

[0016] Optionally, the liquid bladder adopts an integrally formed structure, and the length is not less than the length of the internal corner position; or,

[0017] The liquid bladder adopts a split structure and is formed by butt-jointing a plurality of sub-liquid bladders end to end. The sub-liquid bladders are butt-jointed through a connecting piece. The connecting piece includes a first cylindrical connecting piece and a second cylindrical connecting piece that are inserted into each other. Steel balls are circumferentially arranged on the inner wall of the first cylindrical connecting piece, and grooves adapted to the steel balls are circumferentially arranged on the second cylindrical connecting piece.

[0018] Optionally, an air bag is sleeved on the outer wall of the first cylindrical connecting piece.

[0019] Optionally, the liquid bladder is filled with non-Newtonian fluid.

[0020] Optionally, the adjustable support includes a strut that is perpendicular to the pallet and rotatably connected. A sleeve is threadedly sleeved on the bottom end of the strut, and a U-shaped base is provided at the bottom end of the sleeve. Description of the Drawings

[0021] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and do not limit the present invention. In the drawings:

[0022] Figure 1 is a construction structure for preventing slurry leakage at the connection node between a horizontal precast member and a cast-in-place structure provided by an embodiment of the present invention Figure 1 ;

[0023] Figure 2 is a construction structure for preventing slurry leakage at the connection node between a horizontal precast member and a cast-in-place structure provided by an embodiment of the present invention Figure 2 ;

[0024] Figure 3 is a schematic diagram of a partial setting structure of the liquid sac part provided by an embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of the structure of the hook bolt provided by an embodiment of the present invention;

[0026] Figure 5 is a schematic diagram of the connection state of the split liquid sac provided by an embodiment of the present invention;

[0027] Figure 6 is a schematic diagram of the structure of the first cylindrical connector provided by an embodiment of the present invention;

[0028] Figure 7 is a schematic diagram of the structure of the second cylindrical connector provided by an embodiment of the present invention.

[0029] Among them, 1, cast-in-place structure formwork; 2, horizontal precast member; 3, liquid sac; 4, pallet; 5, adjustable support; 6, hook bolt; 7, intermediate section; 8, rubber slurry stop plug; 9, hook head; 10, screw; 11, backing plate; 12, locking nut; 13, sub-liquid sac; 14, connector; 15, first cylindrical connector; 16, second cylindrical connector; 17, steel ball; 18, groove; 19, airbag. Detailed Embodiments

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. Herein, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but do not limit the present invention.

[0031] See Figures 1-7 , a construction method for preventing slurry leakage at the connection node between a horizontal precast member and a cast-in-place structure provided by an embodiment of the present invention includes:

[0032] Step 1: Set up the formwork 1 of the cast-in-place structure according to the requirements of the construction design, and determine the length of the internal corner position between the upper side of the formwork 1 of the cast-in-place structure and the horizontal precast member 2.

[0033] Step 2: Fabricate the liquid bladder 3 according to the determined length, fabricate a support plate 4 with an L-shaped cross-section according to the size of the liquid bladder 3, and set up adjustable supports 5 on the bottom surface of the support plate 4.

[0034] Step 3: Place the liquid bladder 3 on the support plate 4, lift the liquid bladder 3 to a position slightly lower than the upper side of the formwork 1 of the cast-in-place structure through the adjustable supports 5, and at the same time, the horizontal side of the support plate 4 abuts against the formwork 1 of the cast-in-place structure.

[0035] Step 4: Complete the construction and positioning of the horizontal precast member 2 according to the conventional process. Continue to lift the liquid bladder 3 through the adjustable supports 5 to squeeze the liquid bladder 3 at the internal corner position, and seal the joint between the formwork 1 of the cast-in-place structure and the horizontal precast member 2 through the liquid bladder 3 to prevent slurry leakage at the joint.

[0036] During implementation, after the formwork 1 of the cast-in-place structure is set up, counterbores are drilled in the formwork 1 of the cast-in-place structure according to the positions where the adjustable supports 5 are to be set up, and hook bolts 6 are inserted through the counterbores.

[0037] Correspondingly, during the process of continuously lifting the liquid bladder 3 through the adjustable supports 5, hook the hook 9 at one end of the hook bolt 6 to the adjustable support 5, and apply a certain tensile force to the adjustable support 5 by screwing the locking nut 12 at the other end, so as to enhance the extrusion strength of the liquid bladder 3 squeezed at the internal corner position.

[0038] During implementation, the hook bolt 6 includes an intermediate section 7 with a length adapted to the width of the cast-in-place structure. Rubber slurry stop plugs 8 are sleeved at both ends of the intermediate section 7. An external thread is provided at the first end of the intermediate section 7 and a hook 9 is connected through the external thread. An internal thread is provided at the second end and a screw rod 10 is coaxially connected through the internal thread. A backing plate 11 and a locking nut 12 are provided on the screw rod 10.

[0039] During the process of inserting the hook bolt 6 through the counterbore, first insert the intermediate section 7 into the counterbore, and then sleeve the rubber slurry stop plugs 8 at both ends of the intermediate section 7. At the same time, the rubber slurry stop plugs 8 are inserted into the gap between the hook bolt 6 and the counterbore for sealing; screw the hook 9 onto the first end of the intermediate section 7 close to the adjustable support 5 until the hook 9 abuts against the outer side of the adjustable support 5, screw the screw rod 10 onto the second end, and sequentially set the backing plate 11 and the locking nut 12 on the screw rod 10. The backing plate 11 abuts against the rubber slurry stop plug 8. The detachable setting of the hook 9 and the screw rod 10 can be removed for turnover use after the construction is completed, reducing the construction cost.

[0040] During implementation, the rubber slurry stop plug 8 is frustum-shaped.

[0041] In implementation, the cross-section of the liquid sac 3 is rectangular, the width of the liquid sac 3 is not less than the width of the support plate 4, and the height of the liquid sac 3 is greater than the height of the support plate 4.

[0042] In implementation, the liquid sac 3 adopts an integrally formed structure, and its length is not less than the length of the internal corner position; or,

[0043] The liquid sac 3 adopts a split structure and is formed by butt-jointing a plurality of sub-liquid sacs 13 end to end. The sub-liquid sacs 13 are butt-jointed through a connecting piece 14. The connecting piece 14 includes a first cylindrical connecting piece 15 and a second cylindrical connecting piece 16 that are inserted into each other. Steel balls 17 are circumferentially arranged on the inner wall of the first cylindrical connecting piece 15, and grooves 18 adapted to the steel balls 17 are circumferentially arranged on the second cylindrical connecting piece 16; the split structure can adapt to the construction requirements of different internal corner size conditions.

[0044] In implementation, an air bag 19 is sleeved on the outer wall of the first cylindrical connecting piece 15 to ensure the overall sealing performance.

[0045] In implementation, the liquid sac 3 is filled with non-Newtonian fluid.

[0046] In implementation, the adjustable support 5 includes a strut that is perpendicular to and rotatably connected to the support plate 4. A sleeve is threadedly sleeved at the bottom end of the strut, and a U-shaped base is arranged at the bottom end of the sleeve; the length of the strut can be determined according to the height of the in-situ cast structure formwork 1. During adjustment, the horizontal side of the support plate 4 abuts against the in-situ cast structure formwork 1. Therefore, rotating the strut can jack up the support plate 4 upward through the threaded connection structure between the strut and the bottom sleeve.

[0047] The solution provided by the embodiment of the present invention uses the liquid sac 3 to seal the joint between the in-situ cast structure formwork 1 and the horizontal precast member 2, which can effectively improve the tightness of the connection part, ensure that there is no slurry leakage between the horizontal precast member 2 and the in-situ cast structure formwork 1, solve the phenomenon of reduced physical properties of concrete caused by slurry leakage, and ensure the subsequent durability of the concrete.

[0048] The above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A method for preventing slurry leakage at the connection node between a horizontal prefabricated component and a cast-in-place structure, characterized in that: include: Complete the support of the cast-in-place structure formwork according to the construction design requirements, and determine the length of the inner angle between the upper side of the cast-in-place structure formwork and the horizontal prefabricated component; The liquid capsule is manufactured according to the determined length, and a support plate with an L-shaped cross section is manufactured according to the size of the liquid capsule, and an adjustable bracket is arranged on the bottom surface of the support plate; Place the liquid capsule on the support plate, and lift the liquid capsule to a position slightly lower than the upper side of the cast-in-place structure template through the adjustable bracket, while the horizontal side of the support plate abuts against the cast-in-place structure template; The horizontal prefabricated components are put into place according to the conventional procedures, and the liquid capsule is lifted by the adjustable bracket to squeeze the liquid capsule at the inner corner. The joints between the cast-in-place structure template and the horizontal prefabricated components are sealed by the liquid capsule to prevent leakage of mortar at the joints. After the cast-in-place structure template is supported, a pair of holes are opened on the cast-in-place structure template according to the position of the adjustable bracket to be supported, and hook bolts are inserted into the pair of holes; Accordingly, in the process of continuing to lift the liquid capsule through the adjustable bracket, the hook head at one end of the hook head bolt is hooked on the adjustable bracket, and a certain pulling force is applied to the adjustable bracket by twisting the locking nut at the other end, thereby enhancing the squeezing strength of the liquid capsule at the inner corner position; The hook bolt includes an intermediate section whose length matches the width of the cast-in-place structure, and rubber stop plugs are sleeved at both ends of the intermediate section. The first end of the intermediate section is provided with an external thread and connected to the hook head through the external thread, and the second end is provided with an internal thread and connected to the screw through the internal thread, and a pad and a locking nut are provided on the screw. During the process of inserting the hook bolt into the counter hole, the middle section is inserted into the counter hole, and the rubber stop plugs are sleeved on both ends of the middle section. At the same time, the rubber stop plugs are inserted into the gap between the hook bolt and the counter hole to seal; the hook head is screwed into the first end of the middle section close to the adjustable bracket until the hook head abuts against the outer side of the adjustable bracket, the second end is screwed into the screw rod, and a pad and a locking nut are sequentially arranged on the screw rod, and the pad and the rubber stop plug abut against each other; The cross section of the liquid capsule is rectangular, the width of the liquid capsule is not less than the width of the support plate, and the height of the liquid capsule is greater than the height of the support plate; the liquid capsule adopts an integrated molding structure, and the length is not less than the length of the inner corner position; or, The liquid capsule adopts a split structure and is formed by connecting a plurality of sub-liquid capsules end to end. The sub-liquid capsules are connected to each other through a connecting piece, and the connecting piece includes a first cylindrical connecting piece and a second cylindrical connecting piece that are plugged into each other. The inner wall of the first cylindrical connecting piece is circumferentially provided with steel balls, and the second cylindrical connecting piece is circumferentially provided with grooves adapted to the steel balls. The interior of the sac is filled with a non-Newtonian fluid.

2. The method for preventing leakage of slurry at the connection node between horizontal prefabricated components and cast-in-place structures as claimed in claim 1 is characterized in that: The rubber stopper is in the shape of a truncated cone.

3. The method for preventing leakage of slurry at the connection node between horizontal prefabricated components and cast-in-place structures as claimed in claim 1, characterized in that: An air bag is sleeved on the outer wall of the first cylindrical connecting piece.

4. The method for preventing slurry leakage at the connection node between the horizontal prefabricated component and the cast-in-place structure according to claim 1, characterized in that: The adjustable bracket comprises a support rod which is vertically connected to the supporting plate and is rotatably connected. A sleeve is threadedly sleeved on the bottom end of the support rod, and a U-shaped base is arranged on the bottom end of the sleeve.

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