Safe construction control method for drying shrinkage cracks on basement exterior walls

Abstract

The present invention discloses a safe construction control method for drying shrinkage cracks on the outer wall of a basement, and the specific steps are as follows: the basement wall is divided into a plurality of unit walls for casting, and a crack adjustment component is pre-installed at each unit wall casting position; after cracks are generated, concrete is injected into the built-in square tube, and the concrete penetrates into the cracks through the through holes to repair the cracks. The outer wall of the basement of the present invention is divided into a plurality of unit walls for casting, and a crack adjustment component is buried during the casting of each unit wall. The crack adjustment component forms a weak layer of the unit wall by means of an elastic adhesive layer, which facilitates the generation of cracks on both sides of the built-in square tube, thereby achieving a controllable crack position and reducing the probability of cracks at other positions of the unit wall. At the same time, after cracks are generated, the crack adjustment component gradually increases the lateral tightening force on the crack position of the unit wall in stages to resist the lateral force of unit wall shrinkage.

Description

Technical Field

[0001] The invention relates to the technical field of basement outer wall drying shrinkage crack treatment, and in particular to a safe construction control method for basement outer wall drying shrinkage cracks. Background Art

[0002] The cracks on the basement exterior wall are mainly caused by the shrinkage of the concrete surface temperature during the cooling stage. Generally, most of the cracks are through cracks, which are vertical cracks that are wide at the top and narrow at the bottom. The cracks can easily cause surface water or groundwater to penetrate into the wall along the cracks, corrode the wall steel bars, and reduce the service life of the wall.

[0003] The Chinese patent authorization announcement number is CN215670255U, and the name is a shrinkage crack control structure for an extra-long concrete exterior wall of a basement, which specifically includes a concrete layer; a formwork; a mounting pipe; a supporting mechanism; a spraying mechanism; a fixing mechanism; and a maintenance mechanism, wherein the maintenance mechanism includes a first straw curtain, a hose, a second straw curtain, a connecting pipe, a through hole, a base, and a connecting pipe. The second straw curtain is installed on the top of the concrete layer, and the side walls of the second straw curtain and the first straw curtain are respectively fixedly connected to a plurality of the hoses, and the side walls of the hoses are equidistantly provided with the through holes; the connecting pipe and the base are installed on the side walls of the second straw curtain, and the connecting pipe is connected to the hose; the spraying mechanism is engaged inside the base, and the prior art solution uses a spraying mechanism to maintain the wall in moisture, and at the same time removes the formwork layer by layer to reduce the occurrence of cracks;

[0004] The disadvantages of the prior art solution are that the prior art solution only resists the shrinkage force of the wall and reduces the occurrence of cracks by moisturizing and maintaining and clamping the formwork, but cannot control the location of the cracks. Once cracks appear, they cannot be controlled in time, so the safety of the wall at a later stage cannot be guaranteed. At the same time, it is not easy to effectively repair the cracks after they occur. Summary of the invention

[0005] In order to overcome the above technical problems, the object of the present invention is to provide a safe construction control method for drying shrinkage cracks on the outer wall of a basement.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] The safe construction control method for drying shrinkage cracks on the basement exterior wall, the specific steps are as follows:

[0008] The first step is to divide the basement wall into a plurality of unit walls for pouring, and install a crack adjustment component in advance at each unit wall pouring position; the crack adjustment component includes an internal square tube, elastic adhesive layers are attached to both sides of the internal square tube, and then the unit walls are poured on both sides of the internal square tube;

[0009] Step 2: After the pouring of each unit wall is completed, the surface of the unit wall is sprayed with water for maintenance;

[0010] Step 3: The weak layer formed by the elastic adhesive layer causes cracks to be generated on both sides of the built-in square tube, and then the crack adjustment component is used to apply lateral force to the crack positions on both sides of the built-in square tube to tighten them, and the crack positions of the unit wall are gradually tightened in stages during the maintenance period;

[0011] The fourth step is to burn and remove the elastic rubber layer. Through holes are provided on both sides of the built-in square tube, and the elastic rubber layer is burned through the through holes from bottom to top along the inside of the built-in square tube.

[0012] Step 5: Inject concrete into the built-in square tube, and the concrete penetrates into the crack through the through hole to repair the crack;

[0013] Step 6: Smooth and cover the interface between the built-in square tube and the unit wall with cement slurry to complete the integrated repair.

[0014] As a further solution of the present invention: a plurality of laterally retractable pulling components are distributed longitudinally and equidistantly on the built-in square tube, the pulling components are used to generate a laterally pulling force on the crack position of the unit wall, and the pulling component includes a slider and a linkage wire, the slider slides down along the built-in square tube, and the unit wall is pulled by the linkage wire; a threaded pressing mechanism that can press longitudinally is provided on the built-in square tube, the threaded pressing mechanism cooperates with the slider, and the pushing slider can be adjusted in stages, so as to gradually tighten the crack position of the unit wall in stages during maintenance.

[0015] As a further solution of the present invention: inclined baffles are arranged on both sides of the bottom of the built-in square tube, and a discharge port is formed between the inclined baffle and the bottom of the built-in square tube for the burnt and melted elastic rubber layer to flow out.

[0016] As a further solution of the present invention: a heat-insulating and moisture-retaining pad is hung on the surface of the unit wall for maintenance. The heat-insulating and moisture-retaining pad includes a heat-insulating outer colloid and a moisture-retaining cotton layer, which respectively perform heat-insulating and moisture-retaining functions, thereby reducing the temperature difference between the inside and outside of the unit wall and preventing the unit wall from drying out and shrinking to form cracks.

[0017] As a further solution of the present invention: a post-cast gap is reserved between two unit walls for shrinkage of both ends of the unit walls.

[0018] As a further solution of the present invention: repair grooves are provided at the outer walls of the front and rear ends of the built-in square tube, and the repair grooves are used to prevent the cement slurry from falling off when the interface between the built-in square tube and the unit wall is smoothed and covered with cement slurry.

[0019] As a further solution of the present invention: the concrete material injected to repair the crack is completed by an injection assembly, and the injection assembly includes an injection conduit. The concrete material is injected into the built-in square tube through the injection conduit, and the injection conduit is moved from bottom to top during the injection process.

[0020] Beneficial effects of the present invention:

[0021] 1. The outer wall of the basement of the present invention is divided into multiple unit walls for casting. A crack adjustment component is buried during the casting of each unit wall. The crack adjustment component forms a weak layer of the unit wall by means of an elastic adhesive layer, which facilitates the generation of cracks on both sides of the built-in square tube, thereby achieving a controllable crack position and reducing the probability of cracks at other positions of the unit wall. At the same time, after the crack is generated, the crack adjustment component gradually increases the lateral tightening force on the crack position of the unit wall in stages to resist the lateral force of the unit wall contraction, thereby limiting the expansion of the crack. At the same time, it can also avoid damaging the unit wall, thereby achieving effective control of the crack and ensuring safety.

[0022] 2. In the present invention, since a through hole is provided on the built-in square tube and there is space inside the built-in square tube, it is convenient to move the flame from bottom to top inside the built-in square tube. The flame burns the elastic rubber layer existing at the crack through the through hole to remove it, thereby preventing the remaining elastic rubber layer from affecting the later repair of the crack;

[0023] 3. The cracks produced by the present invention are distributed on both sides of the built-in square tube, and the built-in square tube is a hollow body with through holes on both sides, which makes it convenient to directly inject concrete from the inside of the built-in square tube. The concrete penetrates into the cracks through the through holes to achieve filling. At the same time, since the material body penetrates the built-in square tube, the firmness of the connection between the built-in square tube and the unit wall can be enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 It is a schematic flow chart of the method of the present invention;

[0026] Figure 2 It is a schematic diagram of the overall structure of the unit wall and the built-in square tube in the present invention;

[0027] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 4 It is a schematic diagram of the top view of the structure of the unit wall and the built-in square tube in the present invention;

[0029] Figure 5 yes Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0030] Figure 6 It is a schematic diagram of the structure of the heat-insulating outer colloid and the moisturizing cotton layer in the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of the ignition assembly and the gas delivery assembly in the present invention;

[0032] Figure 8 It is a structural schematic diagram of the coordinated connection between the injection conduit and the funnel in the present invention.

[0033] In the figure: 1. unit wall; 2. built-in square tube; 3. adjusting nut; 4. stud; 5. screw sleeve; 6. support frame; 7. through hole; 8. elastic rubber layer; 9. pulling block; 10. convex rod; 11. slider; 12. lower rod; 13. pressure block; 14. strip through hole; 15. supporting spring; 16. linkage steel wire; 17. embedded slide groove; 18. repair groove; 19. discharge port; 20. inclined baffle; 21. connecting convex bolt; 22. long conduit; 23. gas transmission component; 24. ignition component; 25. injection conduit; 26. funnel; 27. thermal insulation outer colloid; 28. moisturizing cotton layer. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The safe construction control method for drying shrinkage cracks on the basement exterior wall, the specific steps are as follows:

[0036] The first step is to cast a wall of the basement in sections, that is, to divide it into a plurality of unit walls 1, and then cast the unit walls 1 one by one, and when casting each unit wall 1, a crack adjustment component is pre-installed in the middle of the casting position;

[0037] like Figures 2 to 5As shown, the crack adjustment component includes a built-in square tube 2 and a retractable component that can be retracted laterally. The built-in square tube 2 is vertically buried in the middle position of the unit wall 1. The outer walls of the left and right sides of the built-in square tube 2 are both attached with elastic adhesive layers 8. The elastic adhesive layer 8 is used to form a weak layer between the built-in square tube 2 and the unit wall 1. A plurality of retractable components are provided and are longitudinally equidistantly distributed on the built-in square tube 2. The retractable components are used to generate a transverse retractable force on the crack position of the unit wall 1. The retractable components include a slider 11 and a linkage wire 16. The slider 11 is slidably connected to the built-in square tube 2. Inside the square tube 2, a support spring 15 is connected between the slider 11 and the built-in square tube 2. A plurality of engaging grooves 17 corresponding to the slider 11 are longitudinally and equidistantly provided on the outer walls on both sides of the built-in square tube 2. A retracting block 9 is slidably provided in each engaging groove 17. A linkage wire 16 is connected to the side of each retracting block 9 close to the built-in square tube 2. The linkage wire 16 penetrates the interior of the built-in square tube 2 transversely and is connected to the corresponding slider 11. A convex rod 10 is fixedly connected to the side of the retracting block 9 away from the built-in square tube 2. A plurality of convex rods 10 are distributed transversely and equidistantly.

[0038] A plurality of through holes 7 are evenly distributed on the side wall of the built-in square tube 2 close to the unit wall 1;

[0039] The built-in square tube 2 is also equipped with a threaded pressing mechanism that can be pressed longitudinally. The threaded pressing mechanism cooperates with the slider 11. The threaded pressing mechanism includes a lower through rod 12, which is vertically inserted into the built-in square tube 2. A plurality of pressing blocks 13 corresponding to the slider 11 are longitudinally equidistantly connected to the lower through rod 12. Each slider 11 is provided with a strip through hole 14. The length of the strip through hole 14 is greater than the length of the pressing block 13, and the width is less than the length of the pressing block 13, so that the pressing block 13 passes through the slider 11 after being flush with the strip through hole 14, and then rotates, so that the pressing block 13 is placed on the corresponding slider 11. The top of the lower through rod 12 is rotatably connected with a stud 4, and the top of the built-in square tube 2 is fixedly installed with a support frame 6 by screws. A screw sleeve 5 threadedly connected to the stud 4 is fixedly connected to the support frame 6, and an adjusting nut 3 is fixedly connected to the top of the stud 4;

[0040] When pouring the unit wall 1, the built-in square tube 2 is first fixed in a vertical position, and then the unit wall 1 is poured from the left and right sides of the built-in square tube 2, and the thickness of the built-in square tube 2 is the same as the thickness of the unit wall 1;

[0041] Step 2: After the pouring of a unit wall 1 is completed, the surface of the unit wall 1 is sprayed with water for curing, and a heat preservation and moisture-retaining pad is installed and hung on the surface of the unit wall 1 during curing;

[0042] like Figure 6As shown, the heat-insulating and moisturizing pad body includes a heat-insulating outer colloid 27 and a moisturizing cotton layer 28. The moisturizing cotton layer 28 and the heat-insulating outer colloid 27 are connected together. When the heat-insulating and moisturizing pad body is installed, the moisturizing cotton layer 28 is attached to the surface of the unit wall 1, and the moisturizing cotton layer 28 moisturizes the surface of the unit wall 1. At the same time, the heat-insulating outer colloid 27 is used for heat preservation, so that the temperature difference between the inside and outside of the unit wall 1 is reduced, and the surface concrete of the unit wall 1 is prevented from dehydrating and drying and shrinking to produce cracks;

[0043] Step 3: Since the connection position between the unit wall 1 and the built-in square tube 2 is connected by the elastic adhesive layer 8 and has a certain flexibility, when the unit wall 1 dries and shrinks due to environmental factors, cracks are generated on both sides of the built-in square tube 2 due to the presence of the elastic adhesive layer 8, that is, the deformation is released, and the probability of cracks in other positions of the unit wall 1 is reduced. When the cracks begin to appear, the crack adjustment component applies a lateral force to tighten the crack positions on both sides, and gradually tightens them in stages during the maintenance period to resist the lateral shrinkage force of the unit wall 1 and prevent the cracks from further expanding. Specifically, during the moisture and heat preservation maintenance During the protection stage, the stud 4 is rotated downward a certain distance every day, and the stud 4 pushes the lower through rod 12 downward, and the lower through rod 12 pushes the longitudinally distributed pressure blocks 13 downward, and each pressure block 13 presses down the corresponding slider 11, and the slider 11 slides down a certain distance along the built-in square tube 2. During the sliding process, the slider 11 pulls the corresponding retracting block 9 through the linkage steel wire 16, and the retracting block 9 retracts the connected unit wall 1 through the convex rods 10 distributed equidistantly in the horizontal direction, so that the lateral pulling force opposite to the shrinkage force can be generated at the crack position to resist, and the stud 4 is gradually rotated to avoid rigid damage caused by excessive resistance;

[0044] Step 4: After the unit wall 1 is cured and shaped, in order to repair the cracks, the elastic rubber layer 8 needs to be removed first, and a burning process is performed from bottom to top through the through hole 7 along the inside of the built-in square tube 2, and the burning equipment is a flamethrower;

[0045] like Figure 7 As shown, the flame-spraying device includes a gas delivery component 23, the output end of the gas delivery component 23 is connected to a long conduit 22 through a hose, the long conduit 22 can pass through the strip-shaped through-hole 14 on the slider 11, and the bottom end of the long conduit 22 is connected to an ignition component 24 in pairs. When the elastic rubber layer 8 needs to be processed, the long conduit 22 is passed down to the inner bottom of the built-in square tube 2, and then the gas is delivered to the ignition component 24 at the end through the gas delivery component 23, and the ignition component 24 is started to ignite to generate a flame, and then the flame passes through the through hole 7 to burn the elastic rubber layer 8 on the outside of both sides of the built-in square tube 2 to melt it, and during the combustion process, the ignition component 24 is driven by the long conduit 22 to move and burn from bottom to top, so as to burn the elastic rubber layer 8 at each position, so as to facilitate the later repair of concrete materials to enter the crack for effective connection;

[0046] Both sides of the bottom of the built-in square tube 2 are provided with inclined baffles 20, and the bottom ends of the inclined baffles 20 are provided with connecting convex bolts 21. The top ends of the inclined baffles 20 lean against the elastic rubber layer 8. When the unit wall 1 is cast on both sides of the built-in square tube 2, the inclined baffles 20 are connected to the unit wall 1 through the connecting convex bolts 21. Due to the obstruction of the inclined baffles 20, a discharge port 19 is formed between the inclined baffles 20 and the bottom of the built-in square tube 2. When the elastic rubber layer 8 burns and melts, its melt flows downward and flows out from the discharge port 19, which is convenient for cleaning and disposal;

[0047] Step 5: inject concrete into the built-in square tube 2 to repair the cracks. The injection of concrete is completed by the injection assembly;

[0048] like Figure 8 As shown, the injection assembly includes an injection conduit 25, a funnel 26 is provided on the top of the injection conduit 25, the injection conduit 25 is used to pass down to the inner bottom of the built-in square tube 2, and the funnel 26 is used to guide the concrete material into the injection conduit 25, and then the concrete material is injected into the built-in square tube 2 through the injection conduit 25. During the injection process, the injection conduit 25 is moved from bottom to top, so that the concrete material body is gradually accumulated in the built-in square tube 2, and the concrete material body injected into the built-in square tube 2 penetrates into the generated cracks through the through holes 7 opened on both sides to achieve crack repair. At the same time, when the filled concrete material body is solidified, since the material body penetrates the built-in square tube 2 to connect the unit wall 1, the firmness of the connection position between the unit wall 1 and the built-in square tube 2 can be effectively guaranteed;

[0049] Step 6: After the cracks are repaired, the front and rear ends of the built-in square tube 2 and the interface of the unit wall 1 are repaired, and the cement slurry is used to smooth and cover the interface to complete the integrated repair process. The front and rear ends of the built-in square tube 2 are provided with repair grooves 18. Due to the presence of the repair grooves 18, it is convenient for the cement slurry to be embedded in the built-in square tube 2, and at the same time, it can also cover the interface of the built-in square tube 2 and the unit wall 1 to prevent the cement slurry from falling off;

[0050] When one unit wall 1 is completed, the next unit wall 1 is cast, and a post-cast gap is reserved between the two unit walls 1 to facilitate the shrinkage of both ends of each unit wall 1 during the curing process. After the unit walls 1 are completed, the post-cast gap can be repaired by casting.

[0051] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A safe construction control method for drying shrinkage cracks on basement exterior walls, characterized in that: The specific steps are as follows: The first step is to divide the basement wall into a plurality of unit walls (1) for casting, and to install a crack adjustment component in advance at the casting position of each unit wall (1); the crack adjustment component comprises an inner square tube (2), elastic adhesive layers (8) are attached to both sides of the inner square tube (2), and then the unit walls (1) are cast on both sides of the inner square tube (2); Step 2: After each unit wall (1) is poured, the surface of the unit wall (1) is sprayed with water for curing; Step 3: Cracks are generated on both sides of the built-in square tube (2) through the weak layer formed by the elastic adhesive layer (8), and then a lateral force is applied to the crack positions on both sides of the built-in square tube (2) through the crack adjustment component to tighten them, and the crack positions of the unit wall (1) are gradually tightened in stages during the maintenance period; Step 4: The elastic rubber layer (8) is subjected to a burning and removing treatment. Through holes (7) are provided on both sides of the built-in square tube (2), and the elastic rubber layer (8) is burned through the through holes (7) from bottom to top along the inside of the built-in square tube (2); Step 5: inject concrete into the built-in square tube (2), and the concrete penetrates into the crack through the through hole (7) to repair the crack; Step 6: Smooth and cover the interface between the built-in square tube (2) and the unit wall (1) with cement slurry to complete the integrated repair.

2. The safe construction control method for drying shrinkage cracks of basement exterior walls according to claim 1 is characterized in that: A plurality of retractable assemblies capable of being retracted transversely are longitudinally and equidistantly distributed on the built-in square tube (2). The retractable assemblies are used to generate transverse retractable forces on crack positions of the unit wall (1). The retractable assemblies include a slider (11) and a linkage steel wire (16). The slider (11) slides down along the built-in square tube (2) and retracts the unit wall (1) through the linkage steel wire (16). A threaded pressing mechanism capable of longitudinal pressing is provided on the built-in square tube (2). The threaded pressing mechanism cooperates with the slider (11) and can adjust the pushing slider (11) in stages, so as to gradually tighten the crack position of the unit wall (1) in stages during maintenance.

3. The safe construction control method for drying shrinkage cracks of basement exterior walls according to claim 1 is characterized in that: Sloped baffles (20) are arranged on both sides of the bottom of the built-in square tube (2), and a discharge port (19) is formed between the sloping baffles (20) and the bottom of the built-in square tube (2) for the burnt and melted elastic rubber layer (8) to flow out.

4. The safe construction control method for drying shrinkage cracks of basement exterior walls according to claim 1 is characterized in that: A heat-insulating and moisture-retaining pad is hung on the surface of the unit wall (1) for maintenance. The heat-insulating and moisture-retaining pad comprises a heat-insulating outer colloid (27) and a moisture-retaining cotton layer (28), which respectively perform heat-insulating and moisture-retaining functions, thereby reducing the temperature difference between the inside and outside of the unit wall (1) and preventing the unit wall (1) from drying out and shrinking to produce cracks.

5. The safe construction control method for drying shrinkage cracks of basement exterior walls according to claim 1 is characterized in that: A post-cast gap is reserved between the two unit walls (1) for shrinkage at both ends of the unit walls (1).

6. The safe construction control method for drying shrinkage cracks of basement exterior walls according to claim 1 is characterized in that: Repair grooves (18) are provided on the outer walls of the front and rear ends of the built-in square tube (2). When the interface between the built-in square tube (2) and the unit wall (1) is smoothed and covered with cement slurry, the repair grooves (18) are used to prevent the cement slurry from falling off.

7. The safe construction control method for drying shrinkage cracks of basement exterior walls according to claim 1 is characterized in that: The concrete material injected to repair the crack is completed through an injection assembly, which includes an injection conduit (25). The concrete material is injected into the built-in square tube (2) through the injection conduit (25). During the injection process, the injection conduit (25) is moved from bottom to top.

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