Fabricated laminated building floor structure

Abstract

The invention relates to the field of constructional engineering, in particular to a fabricated composite floor structure which comprises an existing floor, a composite module arranged above the existing floor and an adhesive filled between the composite module and the existing floor, and the composite module is suspended above the existing floor through a plurality of adjustable supporting assemblies. And a gap in which an adhesive can be injected is formed between the existing building floor and the laminated module. According to the embodiment of the invention, the overlapping module is arranged above the existing building floor, and the gap between the overlapping module and the existing building floor is filled with the adhesive, so that the overlapping module and the existing building floor form an integrated structure, and before the adhesive is solidified, the height and the levelness of the overlapping module can be adjusted through the plurality of adjustable supporting assemblies; therefore, the building floor with high strength, levelness and flatness is obtained.

Description

Technical Field

[0001] The invention relates to the field of construction engineering, and in particular to an assembled composite floor structure. Background Art

[0002] On construction sites, some floors need to be filled with heavy equipment or heavy vehicles. The existing floors are often insufficiently strong and need to be reinforced. The cost of demolishing the existing floors is high and time-consuming, so pouring a floor directly on top of them becomes an efficient option.

[0003] However, this approach faces two key problems:

[0004] Newly poured floors take a long time to completely solidify, extending the construction period.

[0005] After the newly poured floor has completely solidified, it is difficult to form a stable connection between the newly poured floor and the existing floor. Faults and cracks often form at the interface between the new and old floor, resulting in the strength of the existing floor not being substantially improved. Summary of the invention

[0006] The object of the present invention is to provide an assembled composite floor structure to solve the problem of how to quickly overlap a new floor on an existing floor to ensure that the two are tightly and firmly connected.

[0007] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0008] As an embodiment of the present invention, a composite load-bearing floor structure includes an existing floor, a composite module disposed above the existing floor, and an adhesive filled between the two, wherein the composite module is suspended above the existing floor through a plurality of adjustable support components to form a gap between the existing floor and the composite module into which the adhesive can be injected;

[0009] The adjustable support assembly includes an embedded nut embedded in the stacking module, and a first screw rod threadedly connected to the embedded nut, the axis of the embedded nut is vertically arranged, and both ends of the embedded nut are exposed above and below the stacking module. The first screw rod passes through the embedded nut and abuts against the top of the existing floor. The height and horizontality of the stacking module relative to the existing floor are adjusted by rotating the first screw rod.

[0010] Furthermore, the embedded nut has an anti-rotation rod extending radially outward, and the anti-rotation rod is embedded in the stacking module and connected to the built-in steel bar skeleton of the stacking module, thereby preventing the embedded nut from rotating when the first screw rod is rotated.

[0011] Furthermore, the first screw is a hollow structure, the top of the first screw is connected to a grouting joint, the bottom is provided with a slurry outlet hole, and a hollow channel connecting the grouting joint and the slurry outlet hole is formed in the middle. The grouting joint is used to connect the grouting equipment to inject the adhesive into the hollow channel, so that the adhesive flows out from the slurry outlet hole.

[0012] Furthermore, a blind hole is provided on the top of the existing floor, the diameter and depth of the blind hole match the shape of the bottom end of the first screw rod, and the bottom end of the first screw rod is sharp so as to be inserted into the blind hole and prevent the first screw rod from sliding sideways.

[0013] As another embodiment of the present invention, a composite load-bearing floor structure includes an existing floor, a composite module disposed above the existing floor, and an adhesive filled between the two, wherein the composite module is suspended above the existing floor through a plurality of adjustable support components to form a gap between the existing floor and the composite module into which the adhesive can be injected;

[0014] The adjustable support assembly includes a construction hole arranged on the stacking module, an expansion sleeve passing through the construction hole and arranged below the stacking module, and a second screw rod passing through the expansion sleeve;

[0015] The expansion sleeve comprises a sleeve portion, an expansion portion and a lifting nut, wherein the sleeve portion is plugged into the construction hole, the lifting nut is threadedly engaged with the second screw, the expansion portion connects the sleeve portion and the lifting nut, and the expansion portion radially expands outward when the lifting nut approaches the sleeve portion to support the bottom surface of the stacking module;

[0016] After the expansion part is fully expanded, the second screw is rotated to drive the lifting nut to continue to move axially, so that the expansion part continues to lift the stacking module upward, thereby adjusting the height and levelness of the stacking module relative to the existing floor.

[0017] Further, the sleeve portion of the expansion sleeve is a hollow cylindrical shape, and the sleeve portion is made of elastic rubber material;

[0018] The expansion portion includes a plurality of push rods and a plurality of support rods, and the push rods and the support rods are symmetrically distributed relative to the axis of the second screw rod, wherein one end of the push rod is rotatably connected to the sleeve portion, one end of the support rod is rotatably connected to the jacking nut, and the other end of the push rod is rotatably connected to the other end of the support rod;

[0019] When the second screw rod rotates to move the lifting nut upward, the push rod and the support rod are radially expanded outward to abut against the bottom surface of the stacking module and provide upward support thereto.

[0020] Furthermore, the length of the support rod is greater than the length of the top rod, and after the top rod is fully unfolded, it can continue to swing upward and close inward, so that the outer end of the top rod can be higher than the inner end, so that the outer end of the top rod contacts the bottom wall of the composite module but does not contact the end edge of the construction hole.

[0021] Furthermore, an anti-rotation protrusion is provided at the outer end of the push rod, and the anti-rotation protrusion has a groove penetrating along the radial direction of the second screw rod, and the groove is used to prevent the push rod from rotating around the axis of the second screw rod and ensure that the outer end of the push rod can move radially.

[0022] Furthermore, a grouting joint is connected to the top of the second screw, and a slurry outlet hole is provided at the bottom, and a hollow channel connecting the grouting joint and the slurry outlet hole is formed in the middle. The grouting joint is used to connect the grouting equipment to inject the adhesive into the hollow channel, so that the adhesive flows out from the slurry outlet hole.

[0023] Furthermore, a first annular flange is provided on the top of the sleeve portion, the first annular flange abuts against the top wall of the stacking module, and a second annular flange is provided on the top of the second screw, the second annular flange abuts against the top wall of the sleeve portion, and when the expansion portion is unfolded, the second annular flange, the sleeve portion and the first annular flange are tightly fitted with the stacking module to form a sealing layer.

[0024] Compared with the prior art, this application has the following beneficial effects:

[0025] Provided is a stacked load-bearing floor structure, in which a stacked module is arranged above an existing floor and a gap between the two is filled with an adhesive, so that the stacked module and the existing floor form an integrated structure, and before the adhesive solidifies, the height and levelness of the stacked module can be adjusted by a number of adjustable support components, thereby obtaining a floor with higher strength, levelness and flatness. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0027] Figure 1A side view of the construction status of the first embodiment of the present invention;

[0028] Figure 2 for Figure 1 Cross-sectional view in the AA direction;

[0029] Figure 3 is a perspective view of a second embodiment of the present invention;

[0030] Figure 4 A side view of the construction status of the second embodiment of the present invention;

[0031] Figure 5 for Figure 4 Cross-sectional view in the BB direction;

[0032] The numbers in the figure represent the following:

[0033] 1-existing floor; 11-blind hole; 2-superimposed module; 21-construction hole; 31-embedded nut; 311-anti-rotation rod; 32-first screw rod; 321-grouting joint; 322-hollow prism; 323-hollow channel; 324-slurry outlet hole; 33-second screw rod; 331-second annular flange; 34-sleeve part; 341-first annular flange; 35-jack rod; 351-anti-rotation protrusion; 36-support rod; 37-jacking nut. DETAILED DESCRIPTION

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

[0035] (First embodiment)

[0036] The composite load-bearing floor structure includes an existing floor 1, a composite module 2 and an adhesive therebetween (not shown in the figure). The existing floor 1 refers to the existing building floor structure. The composite module 2 is a component newly added to the existing floor 1. The composite module 2 is fixedly connected to the existing floor 1 by an adhesive to enhance the thickness and strength of the existing floor 1. A groove can be reserved at the bottom of the composite module 2 as needed to increase the contact area and flow channel of the adhesive, thereby improving the bonding effect.

[0037] In the overall structure, the composite module 2 is suspended above the existing floor 1 through a support system composed of several adjustable support components (such as jacks), so that a certain gap is left between the composite module 2 and the existing floor 1. The thickness and levelness of the gap can be accurately adjusted by adjusting the height of the adjustable support components. Finally, the two are firmly combined by injecting adhesive to achieve overall load-bearing and stability.

[0038] The adjustable support assembly includes an embedded nut 31 embedded in the stacking module 2, and a first screw rod 32 screwed into the embedded nut 31 from top to bottom. The bottom end of the first screw rod 32 contacts the existing floor 1 to provide an upward support force for the stacking module 2. By rotating the first screw rod 32 to adjust the depth of the screwing into the embedded nut 31, the stacking module 2 can be fine-tuned up and down, thereby achieving precise leveling of the top surface of the stacking module 2.

[0039] The embedded nut 31 includes an anti-rotation rod 311 extending radially outward. The anti-rotation rod 311 is embedded in the interior of the stacking module 2 and fixedly connected to the built-in steel frame of the stacking module 2, thereby preventing the embedded nut 31 from rotating when the construction personnel rotate the first screw rod 32.

[0040] A plurality of blind holes 11 are drilled on the top of the existing floor 1 according to design requirements to provide a positioning channel for the subsequent insertion of the first screw rod 32 to prevent the end of the first screw rod 32 from sliding sideways. The diameter and depth of the blind hole 11 need to match the selected first screw rod 32. The bottom end of the first screw rod 32 is sharp and is used to be inserted into the blind hole 11 of the existing floor 1.

[0041] A hollow prism 322 is coaxially connected to the top end of the first screw rod 32 . The hollow prism 322 is used to connect a wrench. Construction workers can use manual or automatic tools to apply torque to the first screw rod 32 .

[0042] The first screw rod 32 may be designed as a hollow structure, so as to be used as a grouting channel for injecting adhesive into the gap between the superimposed module 2 and the existing floor 1 .

[0043] Specifically, the top end of the first screw 32 is connected to a grouting joint 321, which is coaxially connected to one end of the hollow prism 322 away from the first screw 32. The grouting joint 321 is an externally threaded pipe for connecting a grouting pipe of a grouting equipment. A grouting hole 324 is provided at the bottom end of the first screw 32, and a hollow channel 323 connecting the grouting joint 321 and the grouting hole 324 is formed in the middle of the first screw 32.

[0044] The construction method of the composite load-bearing floor structure comprises the following steps:

[0045] Step 1: Drilling the existing floor 1: Drill a number of blind holes 11 on the top surface of the existing floor 1 according to the position and quantity required by the design. The diameter and depth of the blind holes 11 are determined according to the size of the first screw rod 32, and the opening faces upward, corresponding to the position of the first screw rod 32.

[0046] Step 2, prefabricating the superposition module 2: setting an embedded nut 31 in the superposition module 2, and exposing both ends of the embedded nut 31 on the upper and lower surfaces of the superposition module 2 respectively, to ensure that the embedded nut 31 can be connected to the first screw rod 32, and the bottom surface of the superposition module 2 can be processed with a number of grooves as needed to improve the bonding effect with the adhesive and reserve a channel for the adhesive to flow.

[0047] Step 3, installing the first screw rod 32: screw the first screw rod 32 into the embedded nut 31 from the upper surface of the composite module 2, so that the lower end of the first screw rod 32 extends out of the bottom surface of the composite module 2 and is inserted into the blind hole 11 of the existing floor 1.

[0048] Step 4: Adjusting the levelness: By rotating the first screw rod 32, the height and levelness of the stacking module 2 are adjusted to meet the design requirements.

[0049] Step 5: Grouting and fixing: Connect the grouting pipe to the grouting joint 321 of the first screw rod 32, and inject adhesive into the gap between the existing floor 1 and the superimposed module 2 through the hollow channel 323 inside the first screw rod 32 and the grouting hole 324 at the bottom.

[0050] Step 6: Leveling the site: cutting off the first screw rod 32 that is higher than the stacking module 2.

[0051] The specific operation of step four is as follows.

[0052] Preliminary measurement: Use a level or a laser measuring instrument to perform preliminary measurement on the top surface of the stacking module 2 to determine the height difference at the position of each first screw rod 32 .

[0053] Rotation adjustment: rotate the first screw 32 one by one. Rotate the first screw 32 clockwise, the first screw 32 moves downward relative to the nut, and raises the corresponding part of the stacking module 2; rotate the first screw 32 counterclockwise, the first screw 32 moves upward relative to the embedded nut 31, and lowers the corresponding part of the stacking module 2.

[0054] Precise leveling: repeatedly measure the horizontality of the top surface of the stacking module 2, and fine-tune the rotation angle of each first screw rod 32 according to the measurement results until the horizontality of the top surface of the stacking module 2 reaches the accuracy required by the design.

[0055] Through the above steps, it is ensured that the height and levelness of the stacking module 2 meet the design requirements and accurate leveling is achieved.

[0056] Among them, the specific operations of step five are as follows.

[0057] Connect the grouting equipment: firmly connect the grouting pipe to the top grouting hole of the first screw 32 to ensure good sealing.

[0058] Injecting adhesive: Start the grouting equipment, and the adhesive flows downward through the inner cavity of the first screw 32, and flows out evenly from the slurry outlet hole 324 at the bottom and the small holes on the side.

[0059] Filling gaps: The adhesive fills the blind holes 11 of the existing floor 1, the grooves of the stacked modules 2, and all gaps between them, ensuring that there are no bubbles or voids.

[0060] Solidification and fixation: After the adhesive reaches the initial setting time, the grouting equipment is removed. After the adhesive is completely solidified, the composite module 2 and the existing floor 1 form a solid overall structure.

[0061] (Second embodiment)

[0062] The difference between this embodiment and the first embodiment is that the nut 31 is not embedded in the superposition module 2, but the construction hole 21 is drilled on the superposition module 2 on site, and an expansion sleeve is installed on the outside of the second screw rod 33, and then the second screw rod 33 and the expansion sleeve are placed together into the interior of the construction hole 21.

[0063] The expansion sleeve includes a sleeve portion 34, an expansion portion and a lifting nut 37. The sleeve portion 34 and the lifting nut 37 are coaxial and connected as a whole through the expansion portion.

[0064] The sleeve portion 34 is a hollow cylindrical sleeve, whose outer diameter matches the construction hole 21 drilled on the overlapping module 2, and whose inner diameter matches the outer diameter of the second screw 33, and can prevent the sleeve portion 34 from rotating freely inside the construction hole 21, while allowing the second screw 33 to rotate freely therein.

[0065] The lifting nut 37 is sleeved on the second screw rod 33 .

[0066] The expansion portion includes two push rods 35 which are symmetrical with respect to the axis of the second screw rod 33 . One end of the push rod 35 is rotatably connected to the sleeve portion 34 , so that the push rod 35 can swing up and down.

[0067] The expansion portion also includes two support rods 36 symmetrical to the axis of the second screw rod 33 , one end of the support rod 36 is rotatably connected to the lifting nut 37 so that the support rod 36 can swing up and down, and the other end of the support rod 36 is rotatably connected to the free end of the top rod 35 .

[0068] In the initial state of the expansion sleeve, the lifting nut 37 is close to the bottom of the second screw rod 33, and the push rod 35 and the support rod 36 are parallel to the sleeve body. After the expansion sleeve is unfolded, the lifting nut 37 is close to the top of the second screw rod 33, and the push rod 35 and the support rod 36 support the bottom wall of the overlapping module 2 in a wing shape.

[0069] Furthermore, the length of the support rod 36 is greater than the length of the top rod 35, so that the height of the outer end of the top rod 35 can be higher than the inner end of the top rod 35, so that only the outer end of the top rod 35 contacts the bottom wall of the overlapping module 2, and the top rod 35 does not contact the end edge of the construction hole 21, thereby preventing the force of the second screw 33 supporting the overlapping module 2 upward from being applied to the end edge of the construction hole 21, thereby preventing the end edge of the construction hole 21 from being broken.

[0070] The outer end of the push rod 35 refers to an end of the push rod 35 away from the second screw rod 33 .

[0071] In addition, an anti-rotation protrusion 351 is provided at the outer end of the push rod 35, and the anti-rotation protrusion 351 abuts against the bottom surface of the stacking module 2. Specifically, the anti-rotation protrusion 351 has a plurality of grooves penetrating through itself in the radial direction of the second screw rod 33, so that the anti-rotation protrusion 351 can effectively prevent itself from rotating around the axis of the second screw rod 33, but does not prevent itself from moving radially toward the second screw rod 33, so that the push rod 35 can continue to swing upward and close inward after being fully extended outward, so as to push the stacking module 2 to move upward.

[0072] A first annular flange 341 is disposed at the top of the sleeve portion 34 and abuts against the top wall of the stacking module 2 . The sleeve portion 34 is made of elastic rubber material.

[0073] The shape of the second screw 33 is basically the same as that of the first screw 32, and it also has a grouting joint 321, a hollow prism 322, a hollow channel 323 and a slurry outlet hole 324. The difference between the two is that the top of the second screw 33 is also provided with a second annular flange 331 that abuts against the top of the sleeve part 34.

[0074] When the expansion portion expands outward to support the bottom wall of the stacking module 2, the expansion portion applies a downward force to the bottom wall of the stacking module 2 through the second screw 33, the second annular flange 331 and the first annular flange 341 in sequence, so that the second annular flange 331 fits tightly against the sleeve portion 34, and the first annular flange 341 fits tightly against the stacking module 2, thereby forming a sealing layer in subsequent operations, effectively preventing the adhesive from overflowing to the top of the stacking module 2 through the gap between the second screw 33 and the sleeve portion 34, and the gap between the sleeve portion 34 and the construction hole 21.

[0075] The construction method of the second embodiment includes the following steps:

[0076] Step 1: drilling the existing floor 1 (the specific steps are the same as those in the first embodiment), and then drilling the stacking module 2 at the same position to form a through construction hole 21 on the stacking module 2 that is coaxial with the blind hole 11.

[0077] Step 2, install the expansion sleeve and the second screw 33: put the expansion sleeve on the outside of the second screw 33, and pass the second screw 33 and the expansion sleeve from the upper surface of the composite module 2 through the construction hole 21 until the top rod 35 of the expansion sleeve enters the construction hole 21 of the composite module 2, and the sharp end of the second screw 33 is inserted into the blind hole 11 of the existing floor 1.

[0078] Step 3, fix the expansion sleeve and the second screw 33: rotate the second screw 33, and the upward movement of the lifting nut 37 pushes the top rod 35 and the support rod 36 of the expansion sleeve to expand radially outward to form an airplane shape. After the top rod 35 is expanded, it tilts upward and rests against the bottom surface of the stacking module 2 to form a bottom-up support.

[0079] Step 4: Adjust the levelness: Use a spirit level to detect the top surface of the stacking module 2, fine-tune the rotation angle of the second screw 33 as needed, and adjust the lifting height of the swing end of the top rod 35 to adjust the height of the stacking module 2 to ensure that the levelness meets the design requirements.

[0080] Step 5: Grouting fixation: As in the first embodiment, an adhesive is injected into the gap through the second screw 33 to complete the fixation.

[0081] Step 6: Leveling the site: cutting off the expansion sleeve and the second screw 33 that are higher than the stacking module 2.

[0082] The construction method of the second embodiment is different from that of the first embodiment in that: in the first embodiment, the first screw rod 32 plays the role of supporting the overlapping module 2 and adjusting the height of the overlapping module 2, while in the second embodiment, the lifting nut 37 plays the role of supporting the overlapping module 2 and adjusting the height of the overlapping module 2.

[0083] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A composite load-bearing floor structure, characterized in that: The invention comprises an existing floor (1), a stacking module (2) arranged above the existing floor (1), and an adhesive filled between the two, wherein the stacking module (2) is suspended above the existing floor (1) by means of a plurality of adjustable support components, so as to form a gap between the existing floor (1) and the stacking module (2) into which the adhesive can be injected; The adjustable support assembly comprises an embedded nut (31) embedded in the interior of the stacking module (2), and a first screw rod (32) threadedly connected to the embedded nut (31), the axis of the embedded nut (31) being arranged vertically, the two ends of the embedded nut (31) being exposed above and below the stacking module (2), the first screw rod (32) passing through the embedded nut (31) and resting against the top of the existing floor (1), and the height and horizontality of the stacking module (2) relative to the existing floor (1) are adjusted by rotating the first screw rod (32).

2. The composite load-bearing floor structure according to claim 1, characterized in that: The embedded nut (31) has an anti-rotation rod (311) extending radially outward, and the anti-rotation rod (311) is embedded in the stacking module (2) and connected to the built-in steel frame of the stacking module (2), thereby preventing the embedded nut (31) from rotating when the first screw rod (32) is rotated.

3. The composite load-bearing floor structure according to claim 2, characterized in that: The first screw rod (32) is a hollow structure. The top of the first screw rod (32) is connected to a grouting joint (321), and the bottom is provided with a grouting hole (324). A hollow channel (323) connecting the grouting joint (321) and the grouting hole (324) is formed in the middle. The grouting joint (321) is used to connect a grouting device so as to inject the adhesive into the hollow channel (323) so that the adhesive flows out from the grouting hole (324).

4. The composite load-bearing floor structure according to claim 1, characterized in that: A blind hole (11) is provided at the top of the existing floor (1), the diameter and depth of the blind hole (11) match the shape of the bottom end of the first screw rod (32), and the bottom end of the first screw rod (32) is sharp so as to be inserted into the blind hole (11) and prevent the first screw rod (32) from sliding sideways.

5. A composite load-bearing floor structure, characterized in that: The invention comprises an existing floor (1), a stacking module (2) arranged above the existing floor (1), and an adhesive filled between the two, wherein the stacking module (2) is suspended above the existing floor (1) by means of a plurality of adjustable support components, so as to form a gap between the existing floor (1) and the stacking module (2) into which the adhesive can be injected; The adjustable support assembly comprises a construction hole (21) arranged on the stacking module (2), an expansion sleeve passing through the construction hole (21) and arranged below the stacking module (2), and a second screw (33) passing through the expansion sleeve; The expansion sleeve comprises a sleeve portion (34), an expansion portion and a lifting nut (37); the sleeve portion (34) is plug-fitted with the construction hole (21); the lifting nut (37) and the second screw rod (33) are threadedly matched; the expansion portion connects the sleeve portion (34) and the lifting nut (37); and when the lifting nut (37) is close to the sleeve portion (34), the expansion portion radially expands outward to support the bottom surface of the stacking module (2); After the expansion portion is fully expanded, the second screw rod (33) is rotated to drive the lifting nut (37) to continue to move axially, so that the expansion portion continues to lift the stacking module (2) upward, thereby adjusting the height and horizontality of the stacking module (2) relative to the existing floor (1).

6. The composite load-bearing floor structure according to claim 5, characterized in that: The sleeve portion (34) of the expansion sleeve is in a hollow cylindrical shape and is made of elastic rubber material; The expansion portion comprises a plurality of push rods (35) and a plurality of support rods (36), wherein the push rods (35) and the support rods (36) are symmetrically distributed relative to the axis of the second screw rod (33), wherein one end of the push rod (35) is rotationally connected to the sleeve portion (34), one end of the support rod (36) is rotationally connected to the lifting nut (37), and the other end of the push rod (35) is rotationally connected to the other end of the support rod (36); When the second screw rod (33) rotates to move the lifting nut (37) upward, the push rod (35) and the support rod (36) expand radially outward to abut against the bottom surface of the stacking module (2) and provide upward support thereto.

7. The composite load-bearing floor structure according to claim 6, characterized in that: The length of the support rod (36) is greater than the length of the top rod (35). After being fully unfolded, the top rod (35) can continue to swing upward and close inward, so that the outer end of the top rod (35) can be higher than the inner end, so that the outer end of the top rod (35) contacts the bottom wall of the composite module (2) but does not contact the end edge of the construction hole (21).

8. The composite load-bearing floor structure according to claim 7, characterized in that: The outer end of the push rod (35) is provided with an anti-rotation protrusion (351), and the anti-rotation protrusion (351) has a groove penetrating in the radial direction of the second screw rod (33), and the groove is used to prevent the push rod (35) from rotating around the axis of the second screw rod (33) and ensure that the outer end of the push rod (35) can move radially.

9. The composite load-bearing floor structure according to claim 7, characterized in that: The top of the second screw rod (33) is connected to a grouting joint (321), and a slurry outlet hole (324) is provided at the bottom. A hollow channel (323) connecting the grouting joint (321) and the slurry outlet hole (324) is formed in the middle. The grouting joint (321) is used to connect a grouting device so as to inject the adhesive into the hollow channel (323) so that the adhesive flows out from the slurry outlet hole (324).

10. The composite load-bearing floor structure according to claim 9, characterized in that: A first annular flange (341) is provided at the top of the sleeve portion (34), and the first annular flange (341) abuts against the top wall of the stacking module (2). A second annular flange (331) is provided at the top of the second screw rod (33), and the second annular flange (331) abuts against the top wall of the sleeve portion (34). When the expansion portion is unfolded, the second annular flange (331), the sleeve portion (34) and the first annular flange (341) are tightly fitted with the stacking module (2) to form a sealing layer.

Images