A device and construction method for precise quality control of cast-in-place slab strips

Abstract

This invention discloses an auxiliary device and construction method for precise quality control of cast-in-place slab strips, including a bottom formwork, a top support beam, a bottom support beam, and a tension rod. The top surface of the bottom formwork has multiple linearly arranged skeleton modules. Each skeleton module includes an adjustment component and multiple parallel support plates. The two outermost support plates are used to adhere to and press against the side walls of the precast slab. The top support beam has symmetrically arranged legs at both ends, with the two legs supporting the precast slabs on both sides of the formwork to be poured, so that the top support beam spans above the formwork and a shear gap is reserved between the top support beam and the precast slab. The bottom support beam is located below the bottom formwork. The tension rod is vertically inserted into the formwork, with its top and bottom ends penetrating the top and bottom support beams respectively, and each end is screwed with a tensioning nut to ensure the bottom formwork is tightly pressed against the two precast slabs. This invention solves the problems of easy swaying of the horizontal bar and easy leakage of grout from the two sides of the bottom formwork's width direction when using existing T-shaped tie rods.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to an auxiliary device and construction method for precise quality control of cast-in-place slab strips. Background Technology

[0002] Floor slab construction is a common part of building construction. In this process, a steel structure support layer is usually built first, supported by columns. Then, rectangular precast slabs are placed on top of the steel structure support layer at intervals. Next, a bottom formwork is set below the strip gap between two adjacent precast slabs, so that the two sides of the bottom formwork are tightly attached to the bottom surfaces of the two adjacent precast slabs to form a casting groove. Concrete is then poured into the casting groove to form a cast-in-place slab strip. After the cast-in-place slab strip solidifies, it connects with the precast slabs on both sides to form a dense floor slab.

[0003] As can be seen from the above, the airtightness of the fit between the bottom formwork and the bottom surface of the precast slab is a necessary condition for the successful pouring of the cast-in-place slab strip. If the airtightness is not guaranteed, the poured concrete will inevitably flow out from between the bottom formwork and the bottom surface of the precast slab. This will not only form a concrete slope at the edge of the precast slab, but may even cause the bottom surface of the cast-in-place slab strip to be uneven with the bottom surface of the precast slab. This will require manual cleaning and repair later, which is extremely costly and results in a low aesthetic appeal.

[0004] To solve the above problems, existing technologies generally use T-shaped tie rods to control the sealing performance of the bottom template. Specifically, the horizontal bar of the T-shaped tie rod spans the top surface of two adjacent precast slabs, and the vertical bar penetrates the bottom template downwards with external threads. A nut is screwed on, and the bottom template is pressed tightly by the clamping effect of the horizontal bar and the nut.

[0005] However, the above-mentioned device still has the following problems: (1) The horizontal bar of the T-shaped tie rod is easy to swing, and may even fall into the mold to be poured, resulting in an unsatisfactory support effect on the bottom formwork; (2) Although the bottom formwork and the precast slab form a closed mold to be poured, when the concrete is poured, as the quality of the concrete gradually increases, the pressure on the bottom formwork gradually increases. Since the T-shaped tie rod is installed in the middle of the bottom formwork, the two sides of the bottom formwork in the width direction are prone to slight downward bending deformation under the weight of the concrete, resulting in gaps between the bottom formwork and the precast slab and leakage of grout, ultimately leading to The bottom surface of the cast-in-place slab strip is not flush with the bottom surface of the precast slab; (3) After the cast-in-place slab strip has solidified, another layer of concrete needs to be poured on the top surface of the cast-in-place slab strip and the precast slab. At this time, in order to submerge the horizontal bar of the T-shaped tie rod, the thickness of the concrete layer poured is limited by the diameter of the horizontal bar, resulting in an increase in the amount of concrete used; (4) After the floor slab is completed, the bottom formwork needs to be removed, and then the vertical bar of the T-shaped tie rod is cut off. At this time, the end face of the vertical bar is flush with the bottom surface of the cast-in-place slab strip. After the bottom surface of the floor slab is plastered, the end of the vertical bar is prone to rust, resulting in local redness of the plastered surface, which seriously affects the aesthetics. Summary of the Invention

[0006] The purpose of this invention is to provide an auxiliary device for precise quality control of cast-in-place slab strips, which solves the problems of easy swinging of the horizontal bar and easy leakage of grout at both sides of the bottom formwork width direction when using existing T-shaped tie rods.

[0007] This invention is achieved through the following technical solution: A precision quality control auxiliary device for cast-in-place slab strips includes: a bottom template, which is used to form a casting trough with two precast slabs; the top surface of the bottom template has multiple linearly arranged skeleton modules, each skeleton module including an adjustment component and multiple parallel support plates; the adjustment component can adjust the distance between any two support plates; the two outermost support plates are used to adhere to and press against the sidewalls of the precast slabs to connect the bottom template to the precast slabs; and a top support beam, which has symmetrically arranged legs at both ends. The support legs are respectively supported on the precast slabs on both sides of the casting mold, so that the top support beam spans above the casting mold and a shear gap is reserved between the top support beam and the precast slab; the bottom support beam is located below the bottom template and is used to support the bottom template; the tension rod is vertically inserted into the casting mold, and the top and bottom ends of the tension rod pass through the top support beam and the bottom support beam respectively, and are screwed with tension nuts to make the bottom support beam abut against the bottom template, thereby making the bottom template abut against the two precast slabs.

[0008] Optionally, the adjustment assembly includes a sliding plate, an adjusting screw, and multiple sliding rods. The sliding plate is laid on the top surface of the bottom template and slidably connected to the bottom template. The sliding plate has multiple sets of adjusting rails, each set of adjusting rails corresponding to a number of skeleton modules. Each set of adjusting rails corresponds to all the frame plates of the corresponding skeleton module. The adjusting rails gradually move away from the centerline of the sliding plate along their length. All the adjusting rails in each set are symmetrically arranged about the centerline of the sliding plate, and the beginning and end of all the adjusting rails in each set are collinear. Each sliding rod corresponds to a skeleton module. The sliding rod is parallel to the width direction of the sliding plate and is connected to the top surface of the bottom template through a first rod seat. The frame plate slides vertically through the corresponding sliding rod, and the bottom of the frame plate is slidably connected to the corresponding adjusting rail. The adjusting screw is arranged along the centerline of the sliding plate and screwed to the sliding plate. One end of the adjusting screw is rotatably connected to the edge of the bottom template and is detachably connected to a force-saving handle.

[0009] Optionally, the frame includes a sliding plate and a lifting plate; the bottom of the sliding plate is slidably connected to the corresponding adjusting rail, and the sliding plate is vertically slidably inserted through the corresponding sliding rod; the lifting plate is slidably connected to the sliding plate, and the lifting plate is configured as a perforated plate.

[0010] Optionally, the adjusting groove is a straight groove; the slope of the adjusting groove relative to the centerline of the slide plate increases with the increase of the distance between the starting end of the adjusting groove and the centerline of the slide plate; the distance between the starting ends of any two adjacent adjusting grooves is equal, and the distance between the ends of any two adjacent adjusting grooves is equal; multiple support columns are arranged parallel to each other between any two adjacent frame plates, the support columns are perpendicular to the slide plate, the axis of the support column is the same as the distance between the two frame plates on both sides, a pair of adjusting rods are hinged at the top of the support column, the rotation planes of the two adjusting rods are coplanar and parallel to the plane of the frame plate, a second rod seat is hinged at the top of the adjusting rod, the rotation plane of the second rod seat is coplanar with the rotation plane of the adjusting rod, a pair of pressure beams are hinged horizontally at the second rod seat, the free ends of the two pressure beams are symmetrically hinged to the lifting plates on both sides, and the four pressure beams form a rhomboid frame; all the support columns in the same row are fixedly connected by fixed rods.

[0011] Optionally, a sliding bolt is screwed to the bottom of the frame plate and slidably connected to the corresponding adjustment groove rail through the sliding bolt; a semi-cylindrical rod groove is opened at the top of the first rod seat, the rod groove matches the slide rod, the groove wall of the rod groove is provided with a keyway, and the side wall of the slide rod is provided with a corresponding positioning key.

[0012] Optionally, the tensioning rod includes an embedded rod, a disassembly rod, and a connector. The embedded rod and the disassembly rod are coaxially screwed to the connector, and the bottom surface of the connector is flush with the top surface of the bottom template. The embedded rod is vertically fitted with a limiting plate, and the limiting plate is located at the midpoint of the height direction of the mold to be poured.

[0013] Optionally, the connector is frustum-shaped, and the connector is coaxially screwed to the embedded rod and the disassembly rod; the larger diameter end face of the connector is attached to the top surface of the bottom template.

[0014] Optionally, the connector includes a housing and a double-ended nut, the double-ended nut being coaxially sleeved inside the housing and slidably connected to the housing along the axial direction; the pre-embedded rod and the disassembly rod are respectively screwed to both ends of the double-ended nut; the inner wall of the housing is provided with multiple protruding edges, the ends of the protruding edges are provided with limiting plates, the limiting plates are used to abut against the outer edge wall of the double-ended nut to limit the rotation of the housing and the double-ended nut.

[0015] Optionally, the top end of the double-ended nut extends outward to form a limiting disc, the diameter of which is slightly smaller than the outer diameter of the top surface of the housing.

[0016] A method for constructing cast-in-place slab strips includes the following steps: Erect and fix the precast slabs, leaving a predetermined distance between two adjacent precast slabs; The bottom template of any of the above-mentioned cast-in-place slabs with precise quality control auxiliary devices is placed between two precast slabs, so that the top surface of the bottom template is symmetrically attached to the bottom surface of the two precast slabs to form the trough to be poured. Then, the bottom template is pre-supported by columns and / or pins. The frame plates are adjusted by the adjusting assembly so that the two outermost frame plates are attached to and pressed against the side wall of the precast slab; The top support beam and the bottom support beam are installed by means of the tension rod, so that the bottom template is pressed tightly against the two precast slabs; Pour concrete into the mold to be poured until the concrete level is flush with the top surface of the precast slab. After the concrete has solidified, a cast-in-place slab strip will be formed. A thin layer of concrete is poured on the top surface of the cast-in-place slab strip and the precast slab, and after the concrete has solidified, a second layer of concrete is poured. Disassemble the top support beam, and then cut along the top surface of the re-poured concrete layer to the support leg and the tension rod; Disassemble the bottom support beam and the bottom template, and then cut the frame module and the tension rod along the bottom surface of the precast slab and the cast-in-place slab strip.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects: This invention provides an auxiliary device for precise quality control of cast-in-place slab strips. It involves setting a bottom template and linearly arranging multiple skeleton modules on the top surface of the bottom template. Each skeleton module includes multiple parallel support plates and an adjustment assembly. First, the top surface of the bottom template is attached to the bottom surface of the precast slab. Then, the distance between the support plates is adjusted using the adjustment assembly, causing the two outermost support plates to adhere to and press against the sidewalls of the precast slab. Because the support plates are located on the top surface of the bottom template, and the sidewalls of the precast slab have roughness, when the two outermost support plates adhere to and press against the sidewalls of the precast slab, a vertical frictional force is generated, fixing the support plates relative to the sidewalls of the precast slab, thereby ensuring the bottom... Firstly, the formwork and precast slab are relatively fixed. Secondly, because the two outermost support plates are attached to and pressed against the side walls of the precast slab, the right angle at the connection between the precast slab and the bottom formwork is sealed to a certain extent, further improving the sealing performance of the connection. Thirdly, as concrete is gradually poured into the formwork, increasing the pressure on both sides of the bottom formwork in the width direction, the two outermost support plates, attached to and pressed against the side walls of the precast slab, structurally limit the bending deformation of the bottom formwork, thus preventing unnecessary bending deformation on both sides of the bottom formwork in the width direction and preventing grout leakage on both sides of the bottom formwork in the width direction. Based on this, the remaining... The remaining support slabs are adjusted to be spaced out to form the skeleton of the cast-in-place slab strip. As concrete is gradually poured into the formwork, the concrete submerges the support slabs and solidifies with them, effectively improving the structural strength of the cast-in-place slab strip and the connection performance between the slab strip and the precast slab. Based on this, top and bottom support beams, tension rods, and tension nuts are installed. The tension rods and nuts tighten the top and bottom support beams, forcing the bottom support beams to press against the bottom formwork, further compressing the bottom formwork against the precast slab. This further improves the structural performance and airtightness of the formwork, ensuring the bottom surface of the cast-in-place slab strip is flush with the bottom surface of the precast slab. Finally, supports are installed to raise the top support beams. This design creates a shear gap between the top support beam and the precast slab. After the cast-in-place slab has solidified, subsequent concrete pouring can be done in thin layers, simply by smoothing the top surfaces of the precast slab and the cast-in-place slab. The concrete layer will not contact the top support beam during pouring. Once the concrete layer has solidified, the top support beam can be removed, and then the supports and tension rods can be cut along the top surface of the concrete layer. The supports effectively increase local friction, ensuring the top support beam is stably mounted on the precast slab. Through the coordination of these features, this auxiliary device for precise quality control of the cast-in-place slab effectively solves the problems of horizontal bar swaying and grout leakage at the two edges of the bottom formwork width direction when using existing T-shaped tie rods. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the auxiliary device for precise quality control of cast-in-place slab strip provided in an embodiment of the present invention during use; Figure 2 A schematic diagram of the auxiliary device for precise quality control of cast-in-place slab strip provided in an embodiment of the present invention after use (cutting); Figure 3 This is a front sectional view of the bottom formwork and skeleton module of the auxiliary device for precise quality control of cast-in-place slab strips provided in an embodiment of the present invention; Figure 4 A schematic diagram of a support structure for a precise quality control auxiliary device for cast-in-place slabs provided in an embodiment of the present invention; Figure 5 A partial front view of the skeleton module of the auxiliary device for precise quality control of cast-in-place slab strip provided in an embodiment of the present invention; Figure 6 A partial top view of the skeleton module of the auxiliary device for precise quality control of cast-in-place slab strip provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the partial movement of the skeleton module of the auxiliary device for precise quality control of cast-in-place slab strip provided in this embodiment of the invention when it retracts inward; Figure 8 This is a schematic diagram of the movement of the adjusting rod in the auxiliary device for precise quality control of cast-in-place slab strip provided in an embodiment of the present invention; Figure 9 This is a top view of the bottom formwork and frame module of the auxiliary device for precise quality control of cast-in-place slab strips provided in an embodiment of the present invention. Figure 10 A partial top view of the end of the bottom formwork and skeleton module of the auxiliary device for precise quality control of cast-in-place slab strip provided in an embodiment of the present invention; Figure 11 A schematic diagram of the disassembly of the tension rod of the auxiliary device for precise quality control of cast-in-place slab strip provided in an embodiment of the present invention; Figure 12 A half-sectional schematic diagram of the connector of the auxiliary device for precise quality control of cast-in-place slab strip provided in an embodiment of the present invention; Figure 13 A top sectional view of the connector of the auxiliary device for precise quality control of cast-in-place slab strip provided in an embodiment of the present invention; Figure 14 A top view of the bottom support beam of the auxiliary device for precise quality control of cast-in-place slab strips provided in an embodiment of the present invention; Figure 15 This is a side view of the bottom support beam of the auxiliary device for precise quality control of cast-in-place slab strips provided in an embodiment of the present invention.

[0019] The attached diagram shows the markings and corresponding component names: 1-Mold for pouring; 2-Precast slab; 3-Cast-in-place slab strip; 4-Re-poured concrete layer; 10-Top support beam; 11-Foot support; 111-Support rod; 112-Adjusting nut; 113-Locking nut; 114-Support plate; 20-Bottom support beam; 21-Channel steel; 22-Timber; 30-Tension rod; 31-Embedded rod; 311-Limiting plate; 32-Disassembly rod; 33-Connector; 331-Housing shell; 3311-Flange; 3312-Limiting plate; 332-Double Head nut; 3321-Limiting plate; 34-Tightening nut; 40-Bottom template; 41-Frame plate; 411-Transfer plate; 412-Lifting plate; 413-Sliding bolt; 42-Slide plate; 421-Adjusting rail; 43-Adjusting screw; 431-Effort-saving handle; 44-Slide rod; 441-First rod seat; 442-Rod groove; 443-Keyway; 444-Positioning key; 45-Support column; 46-Adjusting rod; 461-Second rod seat; 47-Pressure beam; 48-Fixed rod. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0021] Please refer to Figures 1 to 15 This invention provides an auxiliary device for precise quality control of cast-in-place slab strips, comprising: a bottom template 40, which is used to form a casting trough 1 with two precast slabs 2; the top surface of the bottom template 40 is linearly provided with multiple skeleton modules; each skeleton module includes an adjustment component and multiple parallel support plates 41; the adjustment component can adjust the distance between any two support plates 41; the two outermost support plates 41 are used to adhere to and press against the side wall of the precast slab 2 to connect the bottom template 40 to the precast slab 2; and a second component including a top support beam 10, with symmetrically provided legs 11 at both ends of the top support beam 10. The top support beam 10 is supported on the precast slabs 2 on both sides of the mold 1 to be poured, so that the top support beam 10 spans above the mold 1 and a shear gap is reserved between the top support beam 10 and the precast slab 2; the third includes a bottom support beam 20, which is located below the bottom template 40 and is used to support the bottom template 40; the fourth includes a tension rod 30, which is vertically inserted into the mold 1 to be poured, with the top and bottom ends of the tension rod 30 passing through the top support beam 10 and the bottom support beam 20 respectively, and each is screwed with a tension nut 34, so that the bottom support beam 20 abuts against the bottom template 40, thereby abutting the bottom template 40 against the two precast slabs 2.

[0022] The auxiliary device for precise quality control of cast-in-place slab strips provided in this embodiment involves setting a bottom template 40 and linearly arranging multiple skeleton modules on the top surface of the bottom template 40. Each skeleton module includes multiple parallel support plates 41 and an adjustment assembly. First, the top surface of the bottom template 40 is attached to the bottom surface of the precast slab 2. Then, the distance between the support plates 41 is adjusted using the adjustment assembly, causing the two outermost support plates 41 to adhere to and press against the sidewalls of the precast slab 2. Because the support plates 41 are located on the top surface of the bottom template 40, and the sidewalls of the precast slab 2 have roughness, when the two outermost support plates 41 adhere to and press against the sidewalls of the precast slab 2, a vertical frictional force is generated, fixing the support plates 41 relative to the sidewalls of the precast slab 2, thereby ensuring the bottom template 40... Firstly, since the two outermost support plates 41 are fixed relative to the precast slab 2, and the two outermost support plates 41 are attached to and pressed against the side wall of the precast slab 2, the right angle at the connection between the precast slab 2 and the bottom formwork 40 is sealed to a certain extent, further improving the sealing performance of the connection. Secondly, as concrete is gradually poured into the mold 1 to be poured, and the pressure on both sides of the bottom formwork 40 in the width direction gradually increases, the two outermost support plates 41, being attached to and pressed against the side wall of the precast slab 2, will structurally limit the bending deformation of the bottom formwork 40, thereby preventing unnecessary bending deformation on both sides of the bottom formwork 40 in the width direction and thus preventing grout leakage on both sides of the bottom formwork 40 in the width direction. On this basis, the remaining support plates 41 are adjusted to the spacing between them. The formwork is designed to create a framework for the cast-in-place slab strip 3. As concrete is gradually poured into the formwork 1, it submerges the support slab 41 and solidifies with it, effectively enhancing the structural strength of the cast-in-place slab strip 3 and the connection between it and the precast slab 2. Furthermore, by installing a top support beam 10, a bottom support beam 20, a tension rod 30, and a tension nut 34, the tension rod 30 and tension nut 34 tighten the top support beam 10 and the bottom support beam 20, forcing the bottom support beam 20 to press against the bottom formwork 40. This further compresses the bottom formwork 40 against the precast slab 2, further improving the structural performance and airtightness of the formwork 1, and ensuring the bottom surfaces of the cast-in-place slab strip 3 and the precast slab 2 are flush. Finally, by installing supports 11, the top support beam 10... The support beam 10 is raised to create a shear gap between the top support beam 10 and the precast slab 2. After the cast-in-place slab strip 3 has solidified, the concrete layer 4 can be poured in a thin layer. Only the top surfaces of the precast slab 2 and the cast-in-place slab strip 3 need to be smoothed. During the pouring process, the concrete layer 4 will not contact the top support beam 10. After the concrete layer 4 has solidified, the top support beam 10 can be removed, and then the support leg 11 and tension rod 30 can be cut along the top surface of the concrete layer 4. The support leg 11 can effectively increase the local friction, so that the top support beam 10 is stably erected on the precast slab 2. Through the cooperation of the above features, the cast-in-place slab strip quality precision control auxiliary device can effectively solve the problems of easy swinging of the horizontal bar and easy leakage of grout on both sides of the bottom formwork width direction when using the existing T-shaped tie rod.

[0023] To further explain the specific structure of the adjustment assembly, the adjustment assembly includes a sliding plate 42, an adjusting screw 43, and multiple sliding rods 44. The sliding plate 42 is laid on the top surface of the bottom template 40 and is slidably connected to the bottom template 40. The sliding plate 42 has multiple sets of adjusting rails 421, and each set of adjusting rails 421 corresponds one-to-one with multiple skeleton modules. Each set of adjusting rails 421 corresponds one-to-one with all the frame plates 41 of the corresponding skeleton module. The adjusting rails 421 gradually move away from the centerline of the sliding plate 42 along the length direction, and all the adjusting rails 421 in each set are symmetrical about the centerline of the sliding plate 42. In each group, the beginning and end of all the adjustment rails 421 are collinear. The slide rods 44 correspond one-to-one with the skeleton modules. The slide rods 44 are parallel to the width direction of the slide plate 42 and are connected to the top surface of the bottom template 40 through the first rod seat 441. The frame plate 41 is vertically slidably inserted through the corresponding slide rod 44, and the bottom of the frame plate 41 is slidably connected to the corresponding adjustment rail 421. The adjustment screw 43 is set along the center line of the slide plate 42 and is screwed to the slide plate 42. One end of the adjustment screw 43 is rotatably connected to the edge of the bottom template 40 and is detachably connected to a force-saving handle 431.

[0024] With the above setup, during use, simply use the effortless handle 431 to drive the adjusting screw 43 to rotate in a specific direction, thereby causing the slide plate 42 connected to it to move in a specific direction, thus causing all the adjusting rails 421 on it to move in a specific direction. As the adjusting rails 421 gradually move away from the centerline of the slide plate 42 along the length direction, they apply force to the bottom of all the support plates 41. Since the support plates 41 are simultaneously slidably connected to the slide rod 44, the force applied by the adjusting rails 421 to the support plates forces the support plates 41 to move along the slide rod 44, thereby simultaneously adjusting the spacing between all the support plates 41. Furthermore, since all the adjusting rails 421 in each group are symmetrically arranged about the centerline of the slide plate 42, and the beginning and end of all the adjusting rails 421 in each group are collinear, all the support plates 41 in each group are also symmetrically displaced about the centerline of the slide plate 42 along the width direction of the slide plate 42, so that the two outermost support plates 41 simultaneously adhere to and are pressed against the side walls of the precast slabs 2 on both sides.

[0025] It should be noted that since the end of the effort-saving handle 431 is detachably connected to the adjusting screw 43, the effort-saving handle 431 can be connected to the adjusting screw 43 only when adjusting the frame plate 41, and the effort-saving handle 431 can be detached after the adjustment is completed.

[0026] To accommodate different depths of the casting mold 1, the support plate 41 includes a translation plate 411 and a lifting plate 412; the bottom of the translation plate 411 is slidably connected to the corresponding adjustment rail 421, and the translation plate 411 is vertically slidably inserted through the corresponding slide rod 44; the lifting plate 412 is slidably connected to the translation plate 411, and the lifting plate 412 is configured as a perforated plate.

[0027] Through the above settings, the height of the support plate 41 can be adaptively adjusted according to the depth of the mold 1 to be poured, and the lifting plate 412 is set as a perforated plate, which can further improve its connection performance with the concrete, thereby improving the structural performance of the cast-in-place slab strip 3 after solidification.

[0028] Since the depth and width of the casting mold 1 are positively correlated, in order to adjust the height of the support plates 41 while adjusting the width between the two outermost support plates 41, the adjusting groove 421 is a straight groove; the slope of the adjusting groove 421 relative to the centerline of the slide plate 42 increases as the distance between the beginning of the adjusting groove 421 and the centerline of the slide plate 42 increases; the distance between the beginnings of any two adjacent adjusting grooves 421 is equal, and the distance between the ends of any two adjacent adjusting grooves 421 is equal; multiple support columns 45 are arranged parallel to each other between any two adjacent support plates 41, and the support columns 45 are perpendicular to the slide plate 42. The axis of the support column 45 is the same distance from the two frame plates 41 on both sides. The top of the support column 45 is hinged with a pair of adjusting rods 46. The rotation planes of the two adjusting rods 46 are coplanar and parallel to the plane of the frame plate 41. The top of the adjusting rod 46 is hinged with a second rod seat 461. The rotation plane of the second rod seat 461 is coplanar with the rotation plane of the adjusting rod 46. The second rod seat 461 is horizontally hinged with a pair of pressure beams 47. The free ends of the two pressure beams 47 are symmetrically hinged with the lifting plates 412 on both sides. The four pressure beams 47 form a rhomboid frame. All the support columns 45 located in the same row are fixedly connected by fixed rods 48.

[0029] With the above configuration, when the frame plates 41 are adjusted using the labor-saving handle 431, causing all frame plates 41 to move outward along the width direction of the slide plate 42, the adjusting groove 421 is a straight groove with a gradually increasing slope (the slope of the adjusting groove 421 located on the outer side is larger). Therefore, as the frame plates 41 gradually move outward, the distance between two adjacent clamping plates 41 also gradually increases, thereby pulling the pressure beams 47 outward. Since the four pressure beams 47 form a rhomboid frame and the length of the pressure beams 47 is fixed, when the pressure beams 47 are pulled outward, the end of the pressure beam 47 away from the frame plate 41 rotates inward, thereby causing the ends of the four pressure beams 47 away from the frame plate 41 to gradually move closer together. The two adjusting rods 46 are pressed inward symmetrically by the two second rod seats 461, forcing the tops of the adjusting rods 46 to gradually approach each other, thus gradually turning the adjusting rods 46 to a vertical state. Since its length is fixed, as it gradually approaches a vertical state, its vertical projection length gradually increases. The bottom end of the support column 45, which is hinged to its bottom end, abuts against the slide plate 42. Therefore, the bottom end of the adjusting rod 46 cannot descend, but only the top end rises, thereby driving the lifting plate 412, which is hinged to its top end, to rise. This achieves the effect of adjusting the width between the two outermost frame plates 41 while also adaptively adjusting the height of the frame plates 41.

[0030] It should be noted that, since the adjusting rail 421 is a straight rail, and the beginning and end of all adjusting rails 421 are collinear (the connecting line is parallel to the width direction of the slide plate 42), and the distance between the beginnings of any two adjacent adjusting rails 421 is equal, and the distance between the ends of any two adjacent adjusting rails 421 is equal, therefore, when a straight line is drawn along the width direction of the slide plate 42, and this straight line is compared with all adjusting rails 421, a line segment is formed between two adjacent adjusting rails 421. Then, all line segments have the same length. Therefore, when all the support plates 41 move outward synchronously, the distance between any two support plates 41 is always the same. Therefore, at any time, the angle of all adjusting rods 46 is the same, that is, at any time, the height of all lifting plates 412 is the same.

[0031] To facilitate the subsequent disassembly of the bottom template 40, a sliding bolt 413 is screwed onto the bottom of the frame plate 41, and the sliding bolt 413 is slidably connected to the corresponding adjustment groove rail 421; a semi-cylindrical rod groove 442 is opened on the top of the first rod seat 441, the rod groove 442 matches the slide rod 44, the groove wall of the rod groove 442 is provided with a keyway 443, and the side wall of the slide rod 44 is provided with a corresponding positioning key 444.

[0032] With the above setup, when the cast-in-place slab strip 3 has solidified and the bottom formwork 40 needs to be disassembled, only the bottom support beam 20 needs to be disassembled, then the bottom formwork 40 and the sliding plate 42 need to be separated and removed, then all the sliding bolts 413 need to be removed, and then the sliding plate 42 needs to be removed. At this time, the bottom surface of the support plate 41 is flush with the bottom surface of the cast-in-place slab strip 3, and no sawing or cutting is required. Since the top of the first rod seat 441 is open, all the first rod seats 441 can be removed together when the bottom formwork 40 is disassembled; the keyway 442 and the positioning key 444 can prevent the sliding rod 44 from moving unnecessarily along the axial direction during the sliding of the support plate 41.

[0033] It should be noted that the sliding bolt 413 is screwed to the top center of the frame plate 41, and all screwing points are collinear to ensure that any two adjacent clamping plates 41 are identical.

[0034] To prevent the bottom of the tension rod 30 from rusting and causing localized red discoloration of the wall's painted surface, the tension rod 30 includes a pre-embedded rod 31, a disassembly rod 32, and a connector 33. The pre-embedded rod 31 and the disassembly rod 32 are coaxially screwed onto the connector 33, and the bottom surface of the connector 33 is flush with the top surface of the bottom template 40. The pre-embedded rod 31 is vertically fitted with a limiting rib plate 311, which is located at the midpoint of the height direction of the mold 1 to be poured.

[0035] By setting a tension rod 30 including an embedded rod 31, a disassembly rod 32, and a connector 33, and restricting the bottom surface of the connector 33 to be flush with the top surface of the bottom formwork 40, after the concrete has solidified, the bottom support beam 20 and the bottom formwork 40 (and the sliding plate 42) are removed in sequence. Then, the disassembly rod 32 is unscrewed from the connector 33, at which point the bottom surface of the connector 33 is exposed. Next, the connector 33 is unscrewed from the embedded rod 31, and a hole is formed in the original position of the connector 33 on the bottom surface of the cast-in-place slab strip 3. The bottom end of the embedded rod 31 is located in the hole and is not flush with the hole opening. At this time, the hole is filled with concrete until it is flush with the hole opening, and the bottom end of the embedded rod 31 is sealed in the concrete. Then, subsequent plastering can be carried out on the bottom surface of the floor slab. Since the end of the embedded rod 31 is embedded in the concrete, even if it rusts, it will not cause the plaster surface to turn red locally. By setting a limiting rib plate 311, the axial connection performance between the embedded rod 31 and the cast-in-place slab strip 3 can be effectively improved.

[0036] It should be noted that in this embodiment, the top surface of the slide plate 42 is flush with the top surface of the bottom template 40. Therefore, the bottom surface of the connector 33 is also flush with the top surface of the slide plate 42. However, the shape of the slide plate 42 is not certain, so it is uncertain whether it will contact the top surface of the slide plate 42. For example, a ridge is provided at the center line of the top surface of the bottom template 40, and a groove matching the ridge is opened in the middle of the slide plate 42. In this case, the bottom surface of the connector 33 is flush with the top surface of the bottom template 40 (i.e., flush with the top surface of the ridge), but does not contact the top surface of the slide plate 42. Therefore, it is only limited to being flush. It is sufficient that the bottom surface of the connector 33 can be exposed after the bottom template 40 and the slide plate 42 are removed.

[0037] Preferably, the connector 33 is frustum-shaped, and the connector 33 is coaxially screwed with the embedded rod 31 and the disassembly rod 32; the end face of the connector 33 with a larger diameter is attached to the top surface of the bottom template 40.

[0038] By setting connector 33 to a frustum shape and restricting its large-diameter end face to face downwards, it is easier to disassemble it later.

[0039] To further explain the specific structure of connector 33, connector 33 includes a housing 331 and a double-ended nut 332. The double-ended nut 332 is coaxially sleeved inside the housing 331 and slidably connected to the housing 331 axially. The embedded rod 31 and the disassembly rod 32 are respectively screwed to both ends of the double-ended nut 332. The inner wall of the housing 331 has multiple protruding edges 3311, and the ends of the protruding edges 3311 are provided with limiting plates 3312. The limiting plates 3312 are used to abut against the outer edge wall of the double-ended nut 332 to limit the rotation of the housing 331 and the double-ended nut 332.

[0040] With the above setup, during disassembly, first separate the housing 331 from the double-ended nut 332 to make room, and then use a wrench to unscrew the double-ended nut 332 from the embedded rod 31.

[0041] In order to limit the disassembly direction of the housing 331, the top end of the double-headed nut 332 extends outward to form a limiting disc 3321, the diameter of which is slightly smaller than the outer diameter of the top surface of the housing 331.

[0042] With the above settings, the limiting plate 3321 restricts the housing 331 to slide downward along the double-headed nut 332 for removal.

[0043] To further explain the specific structure of the support leg 11, the support leg 11 includes a support rod 111, an adjusting nut 112, and a locking nut 113. The bottom end of the support rod 111 is vertically provided with a support plate 114, which is used to abut against the top surface of the precast slab 2. The top end of the support rod 111 passes through the top support beam 10 and is slidably engaged with the top support beam 10. The locking nut 113 and the adjusting nut 112 are respectively screwed onto the top end of the support rod 111 and are respectively clamped on the top and bottom sides of the top support beam 10. The adjusting nut 112 is used to adjust the width of the shear gap.

[0044] With the above settings, on the one hand, the main body is set as a support rod 111, which is convenient for cutting; on the other hand, it is convenient to screw it with the locking nut 113 and the adjusting nut 112. The setting height of the adjusting nut 112 is directly related to the setting height of the top support beam 10. Therefore, by adjusting the setting height of the adjusting nut 112, the width of the shearing gap can be adjusted.

[0045] To facilitate tightening, both the tension nut 31 and the locking nut 113 are provided with handles extending radially.

[0046] In order to avoid damage to the bottom formwork 40 on the basis of leveling, the bottom support beam 20 includes a channel steel 21 and a timber 22. The timber 22 is partially embedded in the strip groove of the channel steel 21. The timber 22 is used to contact and compress the bottom formwork 3.

[0047] With the above setup, the rigidity and shape of the channel steel 21 are used to ensure leveling, and then the timber 22 is used to replace the channel steel 21 to contact the bottom template 40, thereby using the plasticity of the timber to avoid damage to the bottom template 40.

[0048] This invention also provides a method for constructing cast-in-place slab strips, comprising the following steps: S1. Erect and fix the precast slab 2, leaving a preset distance between two adjacent precast slabs 2; S2. Place the bottom template 40 of any of the above-mentioned cast-in-place slab with precise quality control auxiliary devices between two precast slabs 2, so that the top surface of the bottom template 40 is symmetrically attached to the bottom surface of the two precast slabs 2 to form the casting trough mold 1, and then use pillars and / or pins to pre-support the bottom template 40. S3. Adjust the frame plate 41 by means of the adjustment component so that the two outermost frame plates 41 are attached to and pressed against the side wall of the precast plate 2; S4. Install the top support beam 10 and the bottom support beam 20 through the tension rod 30 so that the bottom template 40 abuts against the two precast slabs 2; S5. Pour concrete into the mold 1 to be poured until the concrete level is flush with the top surface of the precast slab 2. After the concrete solidifies, the cast-in-place slab strip 3 will be formed. S6. Thin concrete is poured on the top surface of the cast-in-place slab strip 3 and the precast slab 2, and after the concrete has solidified, a second concrete layer 4 is formed. S7. Disassemble the top support beam 10, and then cut the support leg 11 and the tension rod 30 along the top surface of the re-poured concrete layer 4. S8. Disassemble the bottom support beam 20 and the bottom template 40, and then cut the skeleton module and the tension rod 30 along the bottom surface of the precast slab 2 and the cast-in-place slab strip 3.

[0049] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An auxiliary device for precise quality control of cast-in-place slab strips, characterized in that, include: The bottom template (40) is used to form a casting trough (1) with two precast slabs (2). The top surface of the bottom template (40) is provided with multiple skeleton modules in a linear manner. The skeleton module includes an adjustment component and multiple parallel frame plates (41). The adjustment component can adjust the distance between any two frame plates (41). The two outermost frame plates (41) are used to be attached to and pressed against the side wall of the precast slab (2) so that the bottom template (40) is connected to the precast slab (2). The top support beam (10) has symmetrical support legs (11) at both ends. The two support legs (11) are respectively supported on the precast plates (2) on both sides of the mold (1) to be poured, so that the top support beam (10) spans above the mold (1) to be poured, and a shear gap is reserved between the top support beam (10) and the precast plate (2). Bottom support beam (20), the bottom support beam (20) is located below the bottom template (40) and is used to support the bottom template (40). A tension rod (30) is vertically inserted into the mold (1) to be poured. The top and bottom ends of the tension rod (30) pass through the top support beam (10) and the bottom support beam (20) respectively, and are screwed with tension nuts (34) to make the bottom support beam (20) abut against the bottom template (40), thereby making the bottom template (40) abut against the two precast slabs (2).

2. The auxiliary device for precise quality control of cast-in-place slab strips according to claim 1, characterized in that, The adjustment assembly includes a sliding plate (42), an adjustment screw (43), and multiple sliding rods (44). The sliding plate (42) is laid on the top surface of the bottom template (40) and is slidably connected to the bottom template (40). The sliding plate (42) has multiple sets of adjustment rails (421). Each set of adjustment rails (421) corresponds to a number of skeleton modules. Each set of adjustment rails (421) corresponds to all the frame plates (41) of the corresponding skeleton module. The adjustment rails (421) gradually move away from the centerline of the sliding plate (42) along the length direction. All the adjustment rails (421) in each set are symmetrically arranged with the centerline of the sliding plate (42) as the axis. The beginning and end of all the adjustment rails (421) in each set are collinear. The slide rod (44) corresponds to the skeleton module one by one. The slide rod (44) is parallel to the width direction of the slide plate (42) and is connected to the top surface of the bottom template (40) through the first rod seat (441). The frame plate (41) slides vertically through the corresponding slide rod (44). The bottom of the frame plate (41) is slidably connected to the corresponding adjustment groove (421). The adjusting screw (43) is set along the center line of the slide plate (42) and screwed to the slide plate (42). One end of the adjusting screw (43) is rotatably connected to the edge of the bottom template (40) and is detachably connected to a force-saving handle (431).

3. The auxiliary device for precise quality control of cast-in-place slab strips according to claim 2, characterized in that, The frame (41) includes a translation plate (411) and a lifting plate (412). The bottom of the translation plate (411) is slidably connected to the corresponding adjustment rail (421), and the translation plate (411) is vertically slidably inserted through the corresponding slide rod (44). The lifting plate (412) is slidably connected to the translation plate (411), and the lifting plate (412) is configured as a perforated plate.

4. The auxiliary device for precise quality control of cast-in-place slab strips according to claim 3, characterized in that, The adjusting groove (421) is a straight groove; The slope of the adjustment groove (421) relative to the centerline of the slide plate (42) increases as the distance between the beginning of the adjustment groove (421) and the centerline of the slide plate (42) increases; The distance between the beginnings of any two adjacent adjustment rails (421) is equal, and the distance between the ends of any two adjacent adjustment rails (421) is equal. Multiple support columns (45) are arranged parallel to each other between any two adjacent frame plates (41). The support columns (45) are perpendicular to the slide plate (42). The axis of the support column (45) is the same as the distance between the two frame plates (41) on both sides. A pair of adjusting rods (46) are hinged at the top of the support column (45). The rotation planes of the two adjusting rods (46) are coplanar and parallel to the plane of the frame plate (41). A second rod seat (461) is hinged at the top of the adjusting rod (46). The rotation plane of the second rod seat (461) is coplanar with the rotation plane of the adjusting rod (46). A pair of pressure beams (47) are hinged horizontally to the second rod seat (461). The free ends of the two pressure beams (47) are symmetrically hinged to the lifting plates (412) on both sides. The four pressure beams (47) form a rhomboid frame. All the support columns (45) located in the same row are fixedly connected by a fixed rod (48).

5. The auxiliary device for precise quality control of cast-in-place slab strips according to any one of claims 2-4, characterized in that, The bottom of the frame plate (41) is screwed with a sliding bolt (413), and is slidably connected to the corresponding adjustment rail (421) through the sliding bolt (413); The first rod seat (441) has a semi-cylindrical rod groove (442) at the top, the rod groove (442) matches the slide rod (44), the groove wall of the rod groove (442) has a keyway (443), and the side wall of the slide rod (44) is provided with a positioning key (444).

6. The auxiliary device for precise quality control of cast-in-place slab strips according to claim 5, characterized in that, The tensioning rod (30) includes a pre-embedded rod (31), a disassembly rod (32) and a connector (33). The pre-embedded rod (31) and the disassembly rod (32) are coaxially screwed to the connector (33). The bottom surface of the connector (33) is flush with the top surface of the bottom template (40). The pre-embedded rod (31) is vertically fitted with a limiting bone plate (311), and the limiting bone plate (311) is located at the center of the height direction of the mold (1) to be poured.

7. The auxiliary device for precise quality control of cast-in-place slab strips according to claim 6, characterized in that, The connector (33) is frustum-shaped and is coaxially screwed with the embedded rod (31) and the disassembly rod (32); The larger diameter end face of the connector (33) is attached to the top surface of the bottom template (40).

8. The auxiliary device for precise quality control of cast-in-place slab strips according to claim 7, characterized in that, The connector (33) includes a housing (331) and a double-ended nut (332), the double-ended nut (332) being coaxially sleeved inside the housing (331) and slidably connected to the housing (331) along the axial direction; The embedded rod (31) and the disassembly rod (32) are respectively screwed to both ends of the double-headed nut (332); The inner wall of the housing (331) is provided with a plurality of protruding edges (3311), and the end of the protruding edges (3311) is provided with a limiting plate (3312). The limiting plate (3312) is used to attach to the outer edge of the double-headed nut (332) to limit the rotation of the housing (331) and the double-headed nut (332).

9. The auxiliary device for precise quality control of cast-in-place slab strips according to claim 8, characterized in that, The top of the double-headed nut (332) extends outward to form a limiting disc (3321), the diameter of which is slightly smaller than the outer diameter of the top surface of the housing (331).

10. A method for constructing cast-in-place slab strips, characterized in that, Includes the following steps: Erect and fix the precast slabs (2), and reserve a preset distance between two adjacent precast slabs (2); The bottom template (40) of the cast-in-place slab with precise quality control auxiliary device according to any one of claims 1-9 is placed between two precast slabs (2), so that the top surface of the bottom template (40) is symmetrically attached to the bottom surface of the two precast slabs (2) to form the casting trough mold (1), and then the bottom template (40) is pre-supported by pillars and / or pins; The frame plate (41) is adjusted by the adjustment component so that the two outermost frame plates (41) are attached to and pressed against the side wall of the precast plate (2); The top support beam (10) and the bottom support beam (20) are installed by means of the tension rod (30) so that the bottom template (40) abuts against the two precast slabs (2); Pour concrete into the mold (1) until the concrete level is flush with the top surface of the precast slab (2) and the concrete solidifies to form a cast-in-place slab strip (3). Thin concrete is poured on the top surface of the cast-in-place slab strip (3) and the precast slab (2), and after the concrete solidifies, a second concrete layer (4) is formed. Remove the top support beam (10), and then cut the support leg (11) and the tension rod (30) along the top surface of the re-poured concrete layer (4); Disassemble the bottom support beam (20) and the bottom template (40), and then cut the skeleton module and the tension rod (30) along the bottom surface of the precast slab (2) and the cast-in-place slab strip (3).

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