A column support system for post-cast strips in basement roof slabs and its construction method

Abstract

This invention discloses a support system and construction method for post-cast strip columns in basement roof slabs, including a base with a height adjuster on it. A frame assembly is movably inserted into one end of the height adjuster, and a detection mold is movably inserted into the top of the frame assembly. This invention relates to the field of building construction technology. The beneficial effects of this invention are that the frame assembly uses standardized unit frames, allowing for flexible addition or reduction of the number of units according to the site's net height, enabling rapid assembly and disassembly, thus shortening the formwork erection and dismantling time. The height adjuster achieves height adjustment through worm gear and screw internal thread sleeve transmission, enabling smooth stepless height adjustment and quickly aligning the top surface of the formwork precisely with the design height. The detection mold has a first working mode and a second working mode. After the concrete reaches a certain strength, by operating the support filler, rebound testing can be performed through the detection holes while the support system remains in its original safe position, without the need to remove the entire formwork.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a post-cast strip column support system for basement roof slabs and its construction method. Background Technology

[0002] In building construction, post-cast strips are temporary structural joints designed to accommodate structural deformation and reduce uneven settlement or temperature stress. The quality of their subsequent sealing and pouring directly affects the integrity and safety of the structure. Due to their special location, post-cast strips in basement roof slabs require a reliable temporary support system during the main structure construction and before sealing to transfer the loads from the superstructure, ensuring construction safety and the stability of adjacent structures. The support systems involved are as follows:

[0003] 1. A post-cast strip independent support system and implementation method disclosed in CN117266558B, which discloses two sets of support components. Both sets of support components include a vertical support rod one and a vertical support rod two. The vertical support rod one and the vertical support rod two are vertically adjustable. A sealing plate is installed on the top of the vertical support rod two. The sealing plate is suitable for supporting the bottom of the post-cast strip area. The two sets of sealing plates are spliced ​​together. Two diagonal braces are installed on both sides of the vertical support rod two. The diagonal braces are suitable for supporting the sealing plate upward. The two ends of the diagonal braces are respectively connected to the vertical support rod.

[0004] 2. A support structure for post-pouring strips of basement roof slabs disclosed in CN113529788B discloses a support frame and a formwork. The support frame is provided in several units and arranged along the length of the post-pouring strip. The support frame includes several uprights, which are divided into two groups along the length of the post-pouring strip. Adjacent uprights are fixed by reinforcing members. Each upright is threaded with a first adjusting cylinder. The top of the first adjusting cylinder is rotatably connected to a first top support. Sleepers are laid on the two first top supports opposite to the post-pouring strip. Several keels are provided on each sleeper. The formwork is laid on the keels.

[0005] Including but not limited to the above-mentioned existing technologies, the support system only has two sections of frame, which are spliced ​​together by a structure with adjustable longitudinal height. For example, the height can be adjusted by using threaded cylinders, pin holes or pads. If there is a large difference between the target height and the existing height, the adjustment is difficult and the operation steps are cumbersome when raising or lowering the support system.

[0006] In actual construction work, it is also necessary to remove part of the formwork to expose the concrete, and then randomly select points or manually draw a rectangular grid array on the concrete to use the rebound method to test the actual concrete strength. This includes, but is not limited to, the above-mentioned existing technology. The top of the support system is usually set with a complete formwork covering a large area. If a large area of ​​formwork is removed, it is equivalent to directly removing the main force-transmitting component of the post-pouring strip area. Once the concrete strength does not reach the target value, its bending and shear bearing capacity will be lower than the design value. The unsupported concrete slab will have a large deflection under its own weight and the upper construction load, which will lead to cracks on the bottom of the slab on both sides of the post-pouring strip, resulting in a low safety factor.

[0007] Furthermore, at any stage of construction, as long as there is an edge and no permanent protective facilities, reliable temporary protection must be set up immediately. Since the pouring strip is used as the dividing line when pouring the basement roof slab, the pouring strip is used to pour the slab on both sides. Therefore, after pouring one side, the pouring strip is the edge of the basement roof slab.

[0008] The existing post-cast strip support system has a simple top slab structure and lacks the function of installing edge protection devices. Usually, after the floor slab is poured and the concrete is completely dry, sleeves are installed on the concrete with bolts, and then edge protection steel pipes are inserted into the sleeves. The operation is complicated. During this period, the edge of the post-cast strip has already been formed, but reliable protection cannot be set up in time, which poses a safety hazard. The edge protection structure installed by bolts alone has low strength and is not firm, which also has a high risk factor. Furthermore, drilling holes in the poured floor slab concrete will damage the concrete structure, affect the structural durability, increase the risk of leakage later, and make repair difficult. In view of this, in-depth research was conducted on the above problems, which led to this case. Summary of the Invention

[0009] The purpose of this invention is to solve the aforementioned problems by designing a post-cast strip column support system and construction method for basement roof slabs. This addresses the shortcomings of existing support systems, which only consist of two sections of frame, making adjustments difficult and cumbersome. Furthermore, in actual construction, it requires removing portions of formwork to expose the concrete, then randomly selecting points or manually drawing a rectangular grid array on the concrete for concrete strength testing using the rebound method. If a large area of ​​formwork is removed, and the concrete strength fails to reach the target value, its bending and shear bearing capacity will be lower than the design value, leading to a weakened concrete floor slab. Under the combined effects of heavy and superstructure construction loads, significant deflection occurs, leading to cracks on the bottom of the slab on both sides of the post-cast strip. This results in a low safety factor. Furthermore, the existing post-cast strip support system has a simple top slab structure and lacks the capability to install edge protection devices. Typically, after the floor slab is poured and the concrete has dried, sleeves are bolted onto the concrete, and then edge protection steel pipes are inserted into the sleeves. This process is complex, poses safety hazards, and results in low strength and instability of the edge protection structure, leading to a high risk factor. Drilling holes in the poured floor slab concrete damages the concrete structure, affects structural durability, increases the risk of future leakage, and makes repairs difficult.

[0010] The technical solution of the present invention to achieve the above objectives is as follows: a column support system for post-cast strip of basement roof slab, including a base, a height adjuster is provided on the base, a frame assembly is movably inserted at one end of the height adjuster, and a detection module is movably inserted at the top of the frame assembly.

[0011] The frame group includes multiple unit frames, the detection module includes a plate, a planned detection area is provided on the plate, a pre-embedded foundation is provided on the plate and on one side of the planned detection area, and a supporting filler is provided on the lower wall of the plate corresponding to the planned detection area. The detection module has a first working mode and a second working mode.

[0012] The first working mode is that the support filler fills the planned detection area; the second working mode is that the support filler is separated from the plate, and the planned detection area on the plate is an open structure.

[0013] The planned detection area consists of detection holes arranged in a rectangular array on the plate. The supporting filler includes a sealing plate, on which a sealing piece matching the detection hole is installed on the upper wall. The thickness of the sealing piece is the same as the depth of the detection hole.

[0014] The embedded foundation includes a plug bolt, which is movably inserted into the plate. One end of the plug bolt is fixedly mounted with a foot, and a sealing washer is provided between the foot and the plate. A U-shaped nut is threaded onto the plug bolt, and a support bolt is threaded onto the top of the foot. A protective sleeve is fixedly installed on the top of the support bolt.

[0015] Preferably, the top of each unit frame is an insertion end, and the bottom of each unit frame is a fitting end. Adjacent unit frames are vertically inserted by matching the insertion end and the fitting end. The bottom unit frame among the multiple unit frames is movably fitted onto the height adjuster through the fitting end. A support is provided on the fitting end and inside the unit frame. The bottom of the support is located below the bottom of the fitting end. The plate is movably fitted onto the insertion end of the top unit frame among the multiple unit frames.

[0016] Preferably, the plate body includes a template, and a first sleeve is installed at each of the four corners of the lower wall of the template. The sealing plate is movably installed on the lower wall of the template via a hinge. A plug sleeve is installed on the lower wall of the sealing plate. The support filler also includes a pin. The pin matches the plug sleeve. A support assembly is also installed on the plate body.

[0017] Preferably, the support assembly includes two studs, which are respectively installed on both sides of the sealing plate. A crossbeam is movably fitted on the two studs. A groove is formed on the upper wall of the crossbeam. The depth of the groove is the same as the thickness of the sealing plate. The groove is movably fitted to the sealing plate. A nut is movably fitted on each stud by means of threads. The nut is movably fitted to the lower wall of the crossbeam.

[0018] Preferably, each of the unit frames includes a bottom node and a top node, with four bottom nodes and four top nodes. The bottom nodes and the top nodes are interconnected by a tie rod assembly. The insertion end is a frame insertion rod, which is installed on the upper wall of the top node. The fitting end is a second sleeve, which is coaxially installed on the lower wall of the top node with the frame insertion rod. The support includes a sleeve plate, which is fixedly fitted onto the bottom node. A foot rod is installed on the lower wall of one end of the sleeve plate inside the tie rod assembly.

[0019] Preferably, the tie rod assembly includes a crossbar, four bottom nodes and four top nodes are arranged in a cube, the crossbar is fixedly welded to each bottom node and top node, a vertical rod is fixedly welded between the bottom node and the top node, a side diagonal rod is installed between the bottom node and the top node corresponding to the diagonal upper side of one side of the cube, and a spatial diagonal rod is installed between the bottom node and the top node corresponding to the diagonal upper side of the cube space.

[0020] Preferably, the height adjuster includes an edge support rod, which is mounted on a base. A sleeve is movably fitted onto the edge support rod, and a lifting platform is mounted on the top of the sleeve. A base insertion rod that matches the second sleeve is mounted on the wall of the lifting platform. An internally threaded sleeve is fixedly inserted into the center of the lifting platform, and a driving structure is installed between the internally threaded sleeve and the base.

[0021] Preferably, the drive structure includes a lead screw, which is threadedly inserted into an internally threaded sleeve. A stand is installed at the center of the upper wall of the base. One end of the lead screw is movably inserted into the stand. A cover is installed on the base. The lead screw movably passes through the upper wall of the cover. A worm gear is fixedly fitted on the lead screw. A handle shaft is movably inserted into the cover. A worm is provided at the center of the handle shaft. The worm and the worm gear mesh with each other.

[0022] Preferably, the base is movably fitted with a base screw via a thread, and an n-shaped frame is mounted on the base, with the lifting platform movably fitted onto the n-shaped frame.

[0023] A method for constructing column supports for post-cast strips in basement roof slabs includes the following steps;

[0024] Step 1: First, plan the inspection area on the plate, and make holes on one side of the planned inspection area on the plate that match the insertion bolts;

[0025] Step 2: Based on the clear height of the basement, calculate the theoretical height of the required support system and the number of unit frames needed.

[0026] Step 3: Move the base and height adjuster to the target position, align the center of the base with the center line of the post-pouring strip, and adjust the base to be level and stable in contact with the ground by rotating the base screws;

[0027] Step 4: Assemble the unit frames from bottom to top according to the pre-calculated number of unit frames, and install the detection module on the top unit frame. Then, install the pre-embedded foundation as a whole on the plate through the holes. During the assembly process, use a plumb line or laser instrument to check the verticality of the frame assembly and the detection module. Adjust the verticality of the unit frame and the detection module by adjusting the bottom screws.

[0028] Step 5: Use the height adjuster to continuously adjust the height of the entire support system until the upper surface of the testing mold is flush with the bottom mold of the post-pouring strip as required by the design.

[0029] Step 6: After the support system is installed and qualified, tie the top slab reinforcement, weld the grout-blocking mesh of the post-pouring strip, and erect the edge protection device. Then pour the concrete on both sides of the post-pouring strip of the basement top slab. After the concrete dries, remove the edge protection device.

[0030] Step 7: After the concrete is poured at the post-cast strip of the basement roof slab, the support bolts and the protective sleeve are embedded in the concrete. After the test block under the same conditions passes the test, the planned test area is exposed by operating the support filler. The concrete strength is tested in the planned test area using the rebound method.

[0031] Step 8: When dismantling the support system, first remove the mountain-shaped nut, and lower the height of the support system by operating the height adjuster so that the entire testing mold is detached from the post-pouring concrete. Then, gradually disassemble the support system, and then rotate the foot and the insert bolt to separate the rotating foot from the concrete.

[0032] The basement roof slab post-cast strip column support system and construction method using the technical solution of this invention employ standardized unit frames, which can be flexibly increased or decreased in number according to the site clearance, enabling rapid assembly and disassembly, shortening the formwork erection and dismantling time. The height adjuster achieves height adjustment through worm gear and screw internal thread sleeve transmission, allowing for smooth stepless height adjustment and quickly aligning the top surface of the formwork precisely with the design height. The formwork detection device has a first working mode and a second working mode. After the concrete reaches a certain strength, the support filling component can be operated, and rebound testing can be performed through the detection hole while the support system remains in place safely, without removing the entire formwork. This avoids the risk of increased concrete deflection or even cracking that may occur due to premature formwork removal for testing in traditional methods, thus improving the safety factor. Through the matching setting of the pre-embedded foundation and the roof slab, the edge protection device can be preset before the edge of the concrete structure is formed, improving the safety factor. The edge protection device can be installed without damaging the concrete, making operation simple, ensuring the durability of the concrete structure, and reducing the risk of later leakage. Attached Figure Description

[0033] Figure 1 This is a top-view three-dimensional structural diagram of the post-cast strip column support system for basement roof slabs according to the present invention.

[0034] Figure 2 This is a three-dimensional structural diagram of the post-cast strip column support system for basement roof slabs as described in this invention, viewed from below.

[0035] Figure 3 This is a three-dimensional structural diagram of the support filling component of the post-cast strip column support system for basement roof slabs according to the present invention, viewed from an upward angle.

[0036] Figure 4 This is a partial upward-view three-dimensional structural diagram of the support filling component of the post-cast strip column support system for basement roof slabs according to the present invention.

[0037] Figure 5 This is a partial top-view three-dimensional structural diagram of the support filling component of the post-cast strip column support system for basement roof slabs according to the present invention.

[0038] Figure 6 This is a schematic diagram of the overall three-dimensional structure of the height adjuster of the post-cast strip column support system for basement roof slabs according to the present invention.

[0039] Figure 7 This is a partial three-dimensional structural diagram of the height adjuster of the post-cast strip column support system for basement roof slabs described in this invention.

[0040] Figure 8 This is a top-view three-dimensional structural diagram of the unit frame of the post-cast strip column support system for basement roof slabs according to the present invention.

[0041] Figure 9 This is a three-dimensional structural diagram of the unit frame of the post-cast strip column support system for basement roof slabs as described in this invention, viewed from an upward angle.

[0042] Figure 10 This is a schematic diagram of the main structure of the unit frame of the post-cast strip column support system for basement roof slabs according to the present invention.

[0043] Figure 11 This is a three-dimensional structural diagram of the embedded foundation of the post-cast strip column support system for basement roof slabs according to the present invention.

[0044] Figure 12 This is a side sectional view of the pre-embedded foundation of the post-cast strip column support system for basement roof slabs according to the present invention.

[0045] In the picture:

[0046] 1. Base; 2. Foot screws;

[0047] 3. Height adjuster; 301. Edge support rod; 302. Sleeve; 303. Lifting platform; 304. Base rod; 305. Internal threaded sleeve; 306. Lead screw; 307. Stand; 308. Cover box; 309. Worm gear; 310. Handle shaft; 311. Worm; 312. N-type frame;

[0048] 4. Unit frame; 41. Bottom node; 42. Top node; 43. Frame insert; 44. Second sleeve; 45. Horizontal bar; 46. Vertical bar; 47. Side diagonal bar; 48. Spatial diagonal bar.

[0049] 5. Support device; 51. Sleeve plate; 52. Leg pole;

[0050] 6. Plate body; 61. Template; 62. First sleeve;

[0051] 7. Support filler; 71. Sealing plate; 72. Sealing piece; 73. Hinge; 74. Pin; 75. Stud; 76. Crossbar; 77. Groove; 78. Nut; 79. Sleeve.

[0052] 8. Inspection hole;

[0053] 9. Embedded foundation; 91. Insert bolts; 92. Foot brackets; 93. V-shaped nuts; 94. Support bolts; 95. Protective sleeves; 96. Sealing washers. Detailed Implementation

[0054] Example 1:

[0055] The present invention will now be described in detail with reference to the accompanying drawings, such as... Figures 1-12 As shown, a column support system for post-cast strips in basement roof slabs.

[0056] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0057] A column support system for post-cast strip of basement roof slab includes a base 1, on which a base bolt 2 is movably inserted by thread, and a height adjuster 3 is provided on the base 1. A frame assembly is movably inserted at one end of the height adjuster 3, and a detection mold is movably inserted at the top of the frame assembly.

[0058] It should be noted that the base 1 and the height adjuster 3 are the basic modules of the support system. In actual construction, the basic module consisting of the base 1 and the height adjuster 3 is placed on the ground of the basement by the foot screws 2, and is set up vertically and vertically with the top slab post-pouring strip. The base 1 is placed stably and horizontally on the ground of the basement by adjusting the foot screws 2. At this time, the height adjuster 3 is at the lowest point.

[0059] Specifically, the frame group includes multiple unit frames 4. The top of each unit frame 4 is an insertion end, and the bottom of each unit frame 4 is a fitting end. Adjacent unit frames 4 are vertically inserted through the mutual matching of the insertion end and the fitting end. A bracket 5 is provided on the fitting end and inside the unit frame 4. The bottom of the bracket 5 is located below the bottom of the fitting end. The bottom unit frame 4 among the multiple unit frames 4 is movably fitted onto the height adjuster 3 through the fitting end.

[0060] It should be noted that during the production stage of the support system, multiple unit frames 4 are produced. In actual construction, the net height from the basement floor to the bottom of the post-pouring strip of the basement roof slab is measured. Based on this height and the height of the unit frame 4, the required number of unit frames 4 is calculated and pre-selected. Different floor height requirements can be quickly adapted by increasing or decreasing the number of unit frames 4. If, after the height adjuster 3, the frame group and the testing mold are assembled, the distance between the top surface of the testing mold and the bottom surface of the post-pouring strip of the basement roof slab is less than the height of one unit frame 4, the overall height of the support system is adjusted by the height adjuster 3 until the top surface of the testing mold reaches the height of the bottom surface of the post-pouring strip of the basement roof slab.

[0061] Specifically, the testing device includes a plate 6, which is movably fitted into multiple unit frames 4 and located on the insertion end of the top unit frame 4. A planned testing area is provided on the plate 6, and a pre-embedded foundation 9 is provided on the plate 6 and on one side of the planned testing area. A support filler 7 is movably provided on the lower wall of the plate 6 corresponding to the planned testing area. The testing device has a first working mode and a second working mode.

[0062] It should be noted that the testing mold is connected to the frame assembly by a movable insert. The testing mold serves as the pouring template 61. The plate 6 is in direct contact with the concrete. A chemically active release agent can be applied to the top of the plate 6 to assist in demolding from the concrete.

[0063] Specifically, in the first working mode, the support filler 7 and the plate 6 are in close contact with each other, and the support filler 7 fills the planned detection area. At this time, the upper wall of the plate 6 forms a closed plane through the matching of the support filler 7 and the planned detection area.

[0064] It should be noted that during the pouring stage, the testing mold is in its first working mode, that is, the support filler 7 and the plate 6 are in close contact with each other, so that the upper wall of the plate 6 forms a complete closed plane, so as to ensure that the plate 6 can serve as the lower formwork 61 to support and shape the concrete at the bottom of the pouring strip when pouring concrete, and prevent grout leakage.

[0065] Specifically, in the second working mode, the supporting filler 7 is separated from the plate 6, and the planned detection area on the plate 6 is an open structure.

[0066] It should be noted that when the concrete pouring of the post-pouring strip in the basement floor slab is completed and the test block shows that the concrete strength has reached the target value, the testing mold is adjusted to the second working mode. By operating the support filler 7, the planned testing area is exposed, and the hardened post-pouring strip concrete entity is exposed in the planned testing area.

[0067] Specifically, the planned detection area consists of detection holes 8 arranged in a rectangular array on the plate 6. The supporting filler 7 includes a sealing plate 71. The upper wall of the sealing plate 71 is fitted with a sealing piece 72 that matches the detection holes 8. The thickness of the sealing piece 72 is the same as the depth of the detection holes 8.

[0068] It should be noted that in the first working mode, the sealing plate 71 is in contact with the lower wall of the plate 6, and the sealing piece 72 is sealed in the detection hole 8, so that the upper wall of the plate 6 forms a complete closed plane. In the second working mode, the sealing plate 71 is separated from the lower wall of the plate 6, so that the sealing piece 72 leaves the detection hole 8 and separates from the concrete, exposing the detection holes 8 arranged in a rectangular array. The operator can use a rebound hammer to test the hardness of the concrete through the detection hole 8, while other parts of the plate 6 still support the concrete, ensuring the support effect of the support system, avoiding large deflection at the part where the formwork 61 is removed, avoiding cracks on both sides of the bottom of the slab, and improving the safety factor. Through the rectangular array of detection holes 8, the operator does not need to spend time measuring and marking the grid on site. He only needs to quickly and sequentially complete the test of all points according to the position of the detection hole 8, which improves the efficiency of the testing operation and avoids missing areas with insufficient strength due to too few test points or improper positions, thus improving the representativeness and reliability of the test results.

[0069] Specifically, the pre-embedded foundation 9 includes a plug bolt 91, which is movably inserted into the plate 6. A foot 92 is fixedly installed at one end of the plug bolt 91. A sealing washer 96 is provided between the foot 92 and the plate 6. A mountain-shaped nut 93 is threaded onto the plug bolt 91. A support bolt 94 is threaded onto the top of the foot 92. A protective sleeve 95 is fixedly installed on the top of the support bolt 94.

[0070] It should be noted that the foot 92 is made of plastic, which facilitates separation from the concrete. The support bolt 94, with the protective sleeve 95 pre-installed, is threaded into the upper wall of the foot 92 to form an assembly. Holes matching the insertion bolt 91 are made on the plate 6, on one side of the planned inspection area. Before installing the plate 6 onto the topmost unit frame 4, a sealing washer 96 is placed on the upper wall of the plate 6, corresponding to the hole. The insertion bolt 91 from the assembly passes through the sealing washer 96 and the hole from above the plate 6, so that the lower wall of the foot 92 fits against the upper wall of the sealing washer 96. Then, a U-shaped nut 93 is fitted below the insertion bolt 91, so that the U-shaped nut 93 fits against... On the lower wall of slab 6, the pre-embedded foundation 9 is fixed, followed by the assembly of the device. After the support system is installed successfully, the mountain-shaped nut 93 can be loosened, the main keel and secondary keel can be installed, and the mountain-shaped nut 93 can be tightened again to fix the main keel and secondary keel. The foot seat 92 is tightly fitted to the sealing gasket 96 to prevent grout leakage. The top plate reinforcement is tied and the post-pouring strip grout barrier is welded. Before the concrete is poured, the longitudinal steel pipe in the edge protection device is inserted into the protective sleeve 95. The edge protection device is preset before the edge is formed, which improves the safety factor. The edge protection device can be installed without damaging the concrete. The operation is simple, ensures the durability of the concrete structure, and reduces the risk of leakage in the later stage.

[0071] Subsequently, the concrete on both sides of the post-pouring strip of the basement roof slab is poured. After the concrete dries completely, the edge protection device is removed. After the concrete is poured in the post-pouring strip of the basement roof slab, the support bolt 94 and the protective sleeve 95 are embedded in the concrete. When removing the support system, first remove the mountain nut 93, and lower the height of the support system by operating the height adjuster 3 so that the entire testing mold is separated from the post-pouring strip concrete. Then, gradually disassemble the support system. Then, rotate the foot 92 and the insert bolt 91 to separate the rotating foot 92 from the sealing washer 96 and the concrete.

[0072] Specifically, the plate body 6 includes a template 61, and a first sleeve 62 is installed at each of the four corners of the lower wall of the template 61. The sealing plate 71 is movably installed on the lower wall of the template 61 via a hinge 73. A plug sleeve 79 is installed on the lower wall of the sealing plate 71. The support filler 7 also includes a pin 74, which matches the plug sleeve 79. A support component is also installed on the plate body 6.

[0073] Specifically, the support assembly includes two studs 75, which are respectively installed on both sides of the sealing plate 71. A crossbeam 76 is movably fitted on the two studs 75. A groove 77 is formed on the upper wall of the crossbeam 76. The depth of the groove 77 is the same as the thickness of the sealing plate 71. The groove 77 is movably fitted on the sealing plate 71. A nut 78 is movably fitted on each stud 75 by thread. The nut 78 is movably fitted on the lower wall of the crossbeam 76.

[0074] It should be noted that the first sleeve 62 is detachably fitted onto the top insertion end of the unit frame 4. In the first working mode, the pin 74 is movably inserted into the sleeve 79 to fix the sealing plate 71, and the crossbar 76 is tightly fitted to the lower wall of the template 61 by the action of the nut 78 and the stud 75. The groove 77 is used to match the thickness of the sealing plate 71. The groove 77 provides large-area support for the sealing plate 71 and prevents the sealing plate 71 from deforming under the pressure of concrete. In the second working mode, the nut 78 and the crossbar 76 are removed in sequence, and the pin 74 is operated to separate it from the sleeve 79. The detection hole 8 can be exposed by rotating the sealing plate 71 through the hinge 73.

[0075] Specifically, each unit frame 4 includes a bottom node 41 and a top node 42, with four bottom nodes 41 and four top nodes 42. The bottom nodes 41 and the top nodes 42 are connected to each other by a tie rod assembly. The insertion end is a frame insertion rod 43, which is installed on the upper wall of the top node 42. The fitting end is a second sleeve 44, which is coaxially installed on the lower wall of the top node 42 with the frame insertion rod 43. The support device 5 includes a sleeve plate 51, which is fixedly fitted on the bottom node 41. A foot rod 52 is installed on the lower wall of one end of the sleeve plate 51 inside the tie rod assembly.

[0076] It should be noted that by fitting the second sleeve 44 of one unit frame 4 onto the frame insertion rod 43 of another unit frame 4, the two unit frames 4 are longitudinally spliced. When the unit frame 4 is placed on the ground, the foot rod 52 is supported on the ground to prevent the second sleeve 44 from wearing with the ground and to ensure that the frame insertion rod 43 and the second sleeve 44 are smoothly connected and inserted. The foot rod 52 is set inside the tie rod assembly to avoid increasing the lateral appearance size of the unit frame 4. The first sleeve 62 matches the frame insertion rod 43.

[0077] Specifically, the tie rod assembly includes a crossbar 45, four bottom nodes 41 and four top nodes 42 arranged in a cube, with a crossbar 45 fixedly welded to both the bottom nodes 41 and the top nodes 42, a vertical rod 46 fixedly welded between the bottom nodes 41 and the top nodes 42, a side diagonal rod 47 installed between the bottom node 41 and the corresponding top node 42 on one side of the cube, and a spatial diagonal rod 48 installed between the bottom node 41 and the corresponding top node 42 on the upper diagonal of the cube space.

[0078] It should be noted that the horizontal bar 45 and the vertical bar 46 are used to position the four bottom nodes 41 and the four top nodes 42, and the side diagonal bar 47 and the spatial diagonal bar 48 are used to support the unit frame 4 and strengthen the unit frame 4.

[0079] Specifically, the height adjuster 3 includes an edge support rod 301, which is mounted on the base 1. A sleeve 302 is movably fitted on the edge support rod 301. A lifting platform 303 is mounted on the top of the sleeve 302. A base insertion rod 304 that matches the second sleeve 44 is mounted on the upper wall of the lifting platform 303. An internal threaded sleeve 305 is fixedly inserted into the center of the lifting platform 303. A drive structure is installed between the internal threaded sleeve 305 and the base 1.

[0080] Specifically, the drive structure includes a lead screw 306, which is threadedly inserted into an internally threaded sleeve 305. A stand 307 is installed at the center of the upper wall of the base 1. One end of the lead screw 306 is movably inserted into the stand 307. A cover 308 is installed on the base 1. The lead screw 306 movably passes through the upper wall of the cover 308. A worm gear 309 is fixedly fitted on the lead screw 306. A handle shaft 310 is movably inserted into the cover 308. A worm 311 is provided at the center of the handle shaft 310. The worm 311 meshes with the worm gear 309.

[0081] As a preferred and further option, an n-shaped frame 312 is mounted on the base 1, and the lifting platform 303 is movably mounted on the n-shaped frame 312;

[0082] It should be noted that a linear bearing can be installed inside the sleeve 302, allowing the sleeve 302 to rise and fall on the edge support rod 301 via the linear bearing. A linear bearing can also be installed at the connection between the lifting platform 303 and the n-shaped frame 312, allowing the lifting platform 303 to rise and fall on the n-shaped frame 312 via the linear bearing. The sleeve 302, the edge support rod 301, and the n-shaped frame 312 provide support and limit for the lifting platform 303. By rotating the handle shaft 310, the handle shaft 310 rotates on the cover box 308, causing the worm gear 311 to rotate, which in turn drives the worm wheel 309 to rotate, thus driving the lead screw 306 to rotate in the stand 307. With the threaded engagement between the lead screw 306 and the internal threaded sleeve 305, the internal threaded sleeve 305 drives the sleeve 302 to rise and fall along the axial direction of the lead screw 306, making the overall height of the support system infinitely adjustable. The operation is simple and convenient, and it is suitable for use in construction spaces of different heights and dimensions.

[0083] Example 2:

[0084] A method for constructing column supports for post-cast strips in basement roof slabs includes the following steps;

[0085] Step 1: First, plan the inspection area on the plate 6, and make a hole on the plate 6 on one side of the planned inspection area that matches the insertion bolt 91;

[0086] Step 2: Based on the clear height of the basement, calculate the theoretical height of the required support system and the number of unit frames needed.

[0087] Step 3: Move the base 1 and the height adjuster 3 to the target position, align the center of the base 1 with the center line of the post-pouring strip, and adjust the base 1 to be level and stably in contact with the ground by rotating the base screws 2;

[0088] Step 4: Assemble the unit frames 4 from bottom to top according to the pre-calculated number of unit frames 4, and install the detection mold on the top unit frame 4. Then, install the pre-embedded foundation 9 as a whole on the plate 6 through the holes. During the assembly process, use a plumb line or laser instrument to check the verticality of the frame assembly and the detection mold. Adjust the verticality of the unit frame 4 and the detection mold by adjusting the bottom screws 2.

[0089] Step 5: Use the height adjuster 3 to steplessly adjust the height of the entire support system until the upper surface of the testing mold is flush with the bottom mold of the post-pouring strip as required by the design.

[0090] Step 6: After the support system is installed and qualified, tie the top slab reinforcement, weld the grout-blocking mesh of the post-pouring strip, and erect the edge protection device. Then pour the concrete on both sides of the post-pouring strip of the basement top slab. After the concrete dries, remove the edge protection device.

[0091] Step 7: After the concrete is poured at the post-cast strip of the basement roof slab, the support bolt 94 and the protective sleeve 95 are embedded in the concrete. After the test block under the same conditions is qualified, the planned test area is exposed by operating the support filler 7. The concrete strength is tested in the planned test area using the rebound method.

[0092] Step 8: When dismantling the support system, first remove the mountain-shaped nut 93, and lower the height of the support system by operating the height adjuster 3 so that the entire testing mold is detached from the post-pouring concrete. Then, gradually disassemble the support system, and then rotate the foot 92 and the insert bolt 91 to separate the rotating foot 92 from the concrete.

[0093] The above technical solutions only embody the preferred technical solutions of the present invention. Any modifications that may be made by those skilled in the art to certain parts thereof embody the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A column support system for post-cast strips in basement roof slabs, comprising a base (1), characterized in that, A height adjuster (3) is provided on the base (1). A frame assembly is movably inserted at one end of the height adjuster (3), and a detection module is movably inserted at the top of the frame assembly. The frame group includes multiple unit frames (4), the detection module includes a plate (6), a planned detection area is provided on the plate (6), a pre-embedded foundation (9) is provided on the plate (6) and on one side of the planned detection area, and a support filler (7) is provided on the lower wall of the plate (6) corresponding to the planned detection area. The detection module has a first working mode and a second working mode. The first working mode is that the support filler (7) fills the planned detection area; the second working mode is that the support filler (7) is separated from the plate (6), and the planned detection area on the plate (6) is an open structure. The planned detection area consists of detection holes (8) arranged in a rectangular array on the plate (6). The supporting filler (7) includes a sealing plate (71), and the upper wall of the sealing plate (71) is fitted with sealing pieces (72) that match the detection holes (8). The pre-embedded foundation (9) includes a plug bolt (91), which is movably inserted into the plate (6). A foot (92) is fixedly installed at one end of the plug bolt (91). A sealing washer (96) is provided between the foot (92) and the plate (6). A mountain-shaped nut (93) is threaded onto the plug bolt (91). A support bolt (94) is threaded onto the top of the foot (92). A protective sleeve (95) is fixedly installed on the top of the support bolt (94).

2. The basement roof slab post-cast strip column support system according to claim 1, characterized in that, The top of each unit frame (4) is an insertion end, and the bottom of each unit frame (4) is a fitting end. Two adjacent unit frames (4) are vertically inserted by matching the insertion end and the fitting end. The unit frame (4) located at the bottom of the multiple unit frames (4) is movably fitted onto the height adjuster (3) through the fitting end. A bracket (5) is provided on the fitting end and inside the unit frame (4). The bottom of the bracket (5) is located below the bottom of the fitting end. The plate (6) is movably fitted onto the insertion end of the top unit frame (4) of the multiple unit frames (4).

3. The basement roof slab post-cast strip column support system according to claim 1, characterized in that, The plate (6) includes a template (61), and a first sleeve (62) is installed at each of the four corners of the lower wall of the template (61). The sealing plate (71) is movably installed on the lower wall of the template (61) via a hinge (73). A plug sleeve (79) is installed on the lower wall of the sealing plate (71). The support filler (7) also includes a pin (74). The pin (74) matches the plug sleeve (79). A support assembly is also installed on the plate (6).

4. The column support system for post-cast strips in basement roof slabs according to claim 3, characterized in that, The support assembly includes two studs (75), which are respectively installed on both sides of the sealing plate (71). A crossbeam (76) is movably fitted on the two studs (75). A groove (77) is provided on the upper wall of the crossbeam (76). The depth of the groove (77) is the same as the thickness of the sealing plate (71). The groove (77) is movably fitted on the sealing plate (71). A nut (78) is movably fitted on each stud (75) by thread. The nut (78) is movably fitted on the lower wall of the crossbeam (76).

5. A column support system for post-cast strips in basement roof slabs according to claim 2, characterized in that, Each of the unit frames (4) includes a bottom node (41) and a top node (42). There are four bottom nodes (41) and four top nodes (42). The bottom nodes (41) and the top nodes (42) are connected to each other by a tie rod assembly. The insertion end is a frame insertion rod (43). The frame insertion rod (43) is installed on the upper wall of the top node (42). The fitting end is a second sleeve (44). The second sleeve (44) is coaxially installed with the frame insertion rod (43) on the lower wall of the top node (42). The bracket (5) includes a sleeve plate (51). The sleeve plate (51) is fixedly fitted on the bottom node (41). The lower wall of one end of the sleeve plate (51) inside the tie rod assembly is equipped with a foot rod (52).

6. The column support system for post-cast strips in basement roof slabs according to claim 5, characterized in that, The tie rod assembly includes a crossbar (45), four bottom nodes (41) and four top nodes (42) arranged in a cube, the crossbar (45) is fixedly welded to both the bottom nodes (41) and the top nodes (42), a vertical rod (46) is fixedly welded between the bottom nodes (41) and the top nodes (42), a side diagonal rod (47) is installed between the bottom node (41) and the top node (42) corresponding to the upper diagonal on one side of the cube, and a spatial diagonal rod (48) is installed between the bottom node (41) and the top node (42) corresponding to the upper diagonal in the space of the cube.

7. A column support system for post-cast strips in basement roof slabs according to claim 5, characterized in that, The height adjuster (3) includes an edge support rod (301), which is mounted on the base (1). A sleeve (302) is movably fitted on the edge support rod (301). A lifting platform (303) is installed on the top of the sleeve (302). A base insertion rod (304) that matches the second sleeve (44) is installed on the upper wall of the lifting platform (303). An internal threaded sleeve (305) is fixedly inserted in the center of the lifting platform (303). A driving structure is installed between the internal threaded sleeve (305) and the base (1).

8. A column support system for post-cast strips in basement roof slabs according to claim 7, characterized in that, The drive structure includes a lead screw (306), which is threadedly inserted into an internally threaded sleeve (305). A stand (307) is installed at the center of the upper wall of the base (1). One end of the lead screw (306) is movably inserted into the stand (307). A cover box (308) is installed on the base (1). The lead screw (306) movably passes through the upper wall of the cover box (308). A worm gear (309) is fixedly fitted on the lead screw (306). A handle shaft (310) is movably inserted into the cover box (308). A worm (311) is provided at the center of the handle shaft (310). The worm (311) meshes with the worm gear (309).

9. A column support system for post-cast strips in basement roof slabs according to claim 7, characterized in that, The base (1) is fitted with a foot screw (2) by a threaded insertion, and an n-shaped frame (312) is installed on the base (1). The lifting platform (303) is movably fitted onto the n-shaped frame (312).

10. A method for constructing column supports for post-cast strips in basement roof slabs, applied to the column support system described in any one of claims 1-9, characterized in that, The following steps are included; Step 1: First, plan the inspection area on the plate (6) in advance, and make a hole on the plate (6) on one side of the planned inspection area that matches the insert bolt (91); Step 2: Based on the clear height of the basement, calculate the theoretical height of the required support system and the number of unit frames (4) needed; Step 3: Move the base (1) and the height adjuster (3) to the target position, align the center of the base (1) with the center line of the post-pouring strip, and adjust the base (1) to be level and stable in contact with the ground by rotating the base screws (2); Step 4: According to the pre-calculated number of unit frames (4), assemble the unit frames (4) from bottom to top, and install the detection mold on the top unit frame (4). Then, install the pre-embedded foundation (9) as a whole on the plate (6) through the hole. During the assembly process, use a plumb line or laser instrument to check the verticality of the frame assembly and the detection mold. Adjust the verticality of the unit frame (4) and the detection mold by adjusting the bottom screws (2). Step 5: Operate the height adjuster (3) to steplessly adjust the height of the entire support system until the upper surface of the test mold is flush with the bottom mold of the post-pouring strip as required by the design. Step 6: After the support system is installed and qualified, tie the top slab reinforcement, weld the grout-blocking mesh of the post-pouring strip, and erect the edge protection device. Then pour the concrete on both sides of the post-pouring strip of the basement top slab. After the concrete dries, remove the edge protection device. Step 7: After the concrete is poured in the post-cast strip of the basement roof slab, the support bolt (94) and the protective sleeve (95) are embedded in the concrete. After the test block under the same conditions is qualified, the planned test area is exposed by operating the support filler (7). The concrete strength is tested in the planned test area using the rebound method. Step 8: When dismantling the support system, first remove the mountain-shaped nut (93), and lower the height of the support system by operating the height adjuster (3) so that the entire testing mold is separated from the post-pouring concrete. Then gradually disassemble the support system, and then rotate the foot (92) and the insert bolt (91) to separate the rotating foot (92) from the concrete.

Images