Building engineering floor deformation joint structure and combined deformation joint construction method thereof

Abstract

The application discloses a building engineering floor ground deformation joint structure, which comprises a base body, a deformation joint arranged on the base body, an anchor-shaped plug-in part arranged in the base body, a hook-shaped anchor part and a positioning plug hole arranged on the anchor-shaped plug-in part, a pressed flat iron arranged on the floor ground of the base body, a horizontal plug-in cavity arranged on the pressed flat iron, a stainless steel gutter arranged on the pressed flat iron, a slit opening arranged in the middle of the stainless steel gutter, an inner lining silica gel mounted on the slit opening, a steel plate part arranged on the stainless steel gutter, stone materials pasted on the upper part of the pressed flat iron and the steel plate part, a horizontal plug-in part arranged on the steel plate part, an expansion gap arranged between the side part of the steel plate part and the side part of the pressed flat iron, elastic glue filled in the expansion gap and the horizontal plug-in cavity, a settlement expansion mechanism arranged at the bottom of the stainless steel gutter, and embedded stone asbestos silk pitch, butyl rubber elliptic column, fire resistance belt and filling layer arranged in sequence below the settlement expansion mechanism. The building engineering floor ground deformation joint structure has the characteristics of good waterproof effect, small structural deformation, simple operation and long service life.

Description

Technical Field

[0001] This invention belongs to the field of building engineering technology, and in particular relates to a building floor expansion joint structure and a combined expansion joint construction method. Background Technology

[0002] According to building codes and practices, when the length of industrial and civil buildings of different structural forms reaches a certain value, in order to avoid damage to the overall structure due to thermal expansion and contraction, it is necessary to add temperature expansion joints, commonly known as deformation joints, to divide the overall structure into several construction sections.

[0003] Conventional expansion joints use rubber or metal waterstops, which are fixed by compaction or mechanical fastening with screws. Even if the small gaps between the waterstop and the base material are sealed with sealant on the inner side of the ends, in practical applications, due to structural settlement, temperature deformation, changes in the concrete itself, and the increasing modulus of rubber over the years, gaps form between the waterstop and the concrete. Water can seep through these gaps on the water-facing side. Furthermore, during the deformation process of the expansion joint, the metal itself lacks resilience, causing gaps to appear at the bond between the metal and the concrete. Waterproof membranes and self-adhesive waterproof membranes are also used for expansion joints. In actual use, due to a combination of factors such as structural deformation, mechanical pressure, water impact, and the limitation of membrane deformation, the adhesion between the membrane and the substrate is damaged, the overlap of the membrane joints is damaged, and the membrane itself is also damaged after a period of time, resulting in the loss of waterproof function. Therefore, how to ensure good waterproof effect and reduce structural deformation in expansion joint structures is something that needs to be explored. Moreover, existing expansion joint structures are generally too difficult to operate and have a short service life, so it is necessary to improve them. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the existing technology by providing a building floor expansion joint structure and its combined expansion joint construction method, which features good waterproofing, reduced structural deformation, simple operation, and long service life.

[0005] To achieve the above objectives, the technical solution adopted by this invention is as follows: a building engineering floor expansion joint structure, comprising a base, on which an expansion joint is provided, an anchor-type insert plate is provided within the base, the anchor-type insert plate is provided with a hook-type anchor and a positioning insertion hole, a pressure-edge flat iron is provided on the floor surface of the base, a transverse insertion cavity is provided on the pressure-edge flat iron, a stainless steel water channel is provided on the pressure-edge flat iron, a slot is opened in the middle of the stainless steel water channel, the slot is fitted with silicone lining, a steel plate is provided on the stainless steel water channel, stone is laid on the upper part of the steel plate and the pressure-edge flat iron, a transverse insertion part is provided on the steel plate, an expansion gap is provided between the side of the steel plate and the side of the pressure-edge flat iron, the transverse insertion part is inserted into the transverse insertion cavity, the expansion gap and the transverse insertion cavity are filled with elastic potting compound, the elastic potting compound is a modified rubber type potting compound; the bottom of the stainless steel water channel is provided with... A settlement expansion mechanism is inserted into a positioning hole. The settlement expansion mechanism includes a damping tube, a side expansion member, a return spring, and a positioning rod. The damping tube has a movable cavity, and the top and bottom surfaces of the movable cavity are provided with damping friction surfaces. The side expansion member is provided with an abutment plate, which moves laterally with damping against the damping friction surface. The return spring is located between the abutment plates. The side expansion member is provided with a hinge ear. A connecting rod is provided at the bottom of the stainless steel ditch, and the connecting rod is hinged to the hinge ear. The positioning rod is inserted into the positioning hole. Below the settlement expansion mechanism, there are asbestos-embedded hemp fiber asphalt, styrene-butadiene rubber elliptical cylinders, fire-resistant strips, and a joint filler layer. The styrene-butadiene rubber elliptical cylinders are made of modified latex styrene-butadiene rubber material, including 23% styrene, 3% acrylamide, and 72% butadiene. The joint filler layer is filled with foam mortar.

[0006] As a preferred embodiment of the present invention, a removable expansion bolt is installed between the pressure flat iron and the base. The removable expansion bolt includes a tapered rod, an outer support rod, an expansion sleeve, and a nut locking member. The outer support rod is provided with a trapezoidal head, which abuts against the expansion sleeve. The nut locking member is provided with a threaded portion, which is threadedly installed with the expansion sleeve to position the outer support rod.

[0007] As a preferred embodiment of the present invention, a drain pipe is provided at the bottom of the stainless steel ditch, and a drainage conveying pipe is provided on the drain pipe.

[0008] A construction method for a combined expansion joint structure for floor and ground expansion joints in building engineering, characterized by the following steps: (1) Expansion joint retention and pre-embedding: During building construction, expansion joints are reserved between adjacent bases, and anchor-type insert plates are pre-embedded in the bases at front and back intervals, wherein the insert plate part of the anchor-type insert plate is exposed at the expansion joint. (2) Install fire-resistant strips: The fire-resistant strips are embedded in the expansion joints using their own elasticity; (3) Install styrene-butadiene rubber elliptical columns: The styrene-butadiene rubber elliptical columns are physically pushed into place between the expansion joints and located above the fire-resistant strip, adapting to longitudinal settlement deformation capacity and lateral expansion and compression deformation capacity. (4) Laying asbestos-embedded hemp fiber asphalt: Lay asbestos-embedded hemp fiber asphalt on top of the styrene-butadiene rubber elliptical column, melt the asphalt and sprinkle it into the asphalt hemp fiber and sprinkle it vertically into the expansion joint, then clean and dry the expansion joint, after filling it, sprinkle talcum powder on both sides of the expansion joint, heat and melt the asphalt and pour it onto the asphalt hemp fiber, after solidification and cooling, remove the excess asphalt. (5) Assemble the stainless steel water ditch, the pressure flat iron and the settlement expansion mechanism: First, the anchor-type insert plate is set at intervals in front and back. The number of settlement expansion mechanisms is matched with the positioning holes on the anchor-type insert plate. The settlement expansion mechanism is designed and manufactured first. Then, the hinge ear and the connecting rod at the bottom of the stainless steel water ditch are used to achieve rotational installation. Then, the horizontal insert part of the steel plate on the stainless steel water ditch is inserted into the horizontal insert cavity to achieve longitudinal limit installation. Before installation, the horizontal insert cavity is filled with elastic glue, and then the external expansion gap is filled with elastic glue again. (6) Installation of the settlement expansion mechanism: The positioning rod is positioned and lowered into the positioning hole, and the anchor plate supports and limits its position. (7) Stone reinforcement: Stone is laid in the expansion gap, on the steel plate of the stainless steel water channel and on the edge flat iron for reinforcement and decoration; (8) Joint filling layer construction: Fill the bottom of the expansion joint with joint filling layer to complete the construction.

[0009] This invention features a scientifically sound and rationally designed structure. Anchor-type insert plates are pre-embedded within the substrate, forming a stable structure with the hook-shaped anchor portion, ensuring the anchor-type insert plates are fixed. During installation of the stainless steel water channel, the settlement and expansion mechanism is pre-assembled at the bottom of the channel, and then assembled with the pressure-edge flat iron. The stainless steel water channel is horizontally inserted into the horizontal insertion cavity through the steel plate portion. An expansion gap is provided between the side of the steel plate portion and the side of the pressure-edge flat iron. The expansion gap and the horizontal insertion cavity are filled with elastic grout. When the expansion joint structure expands or contracts, the elasticity of the grout allows the top of the stainless steel water channel and the pressure-edge flat iron to effectively follow the expansion and contraction. Furthermore, the settlement and expansion mechanism at the bottom of the stainless steel water channel effectively regulates the settlement or expansion of the expansion joint. The expansion joint structure mitigates and reduces structural deformation. The silicone lining installed at the joint provides some waterproofing to the floor. Even if leakage occurs, the water will drain into the stainless steel drainage channel, creating a second layer of waterproofing. Furthermore, the horizontal insertion structure, connected by elastic adhesive, also effectively achieves waterproofing. This structure is relatively simple to operate and has a long service life. Secondly, the styrene-butadiene rubber elliptical columns, based on their tensile strength characteristics, allow the expansion joint structure to adapt to both longitudinal settlement deformation and lateral expansion and compression deformation. The asbestos-embedded hemp fiber asphalt layer laid on the styrene-butadiene rubber elliptical columns provides excellent leak-stopping effect, and the fire-resistant strip enhances the building's fire resistance. Finally, the joint filler layer reinforces the bottom of the expansion joint. Attached Figure Description

[0010] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structural design of the present invention; Figure 2 This is a schematic diagram of the expansion joint of the present invention; Figure 3 This is a schematic diagram of the structure of the anchor-type insert plate of the present invention; Figure 4 This is a schematic diagram of the installation of the stainless steel water channel and the pressure flat iron of the present invention; Figure 5 This is a schematic diagram of the installation of the stainless steel water ditch and the settlement telescopic mechanism of the present invention. Figure 6 This is a schematic diagram of the structure of the easy-to-remove expansion bolt of the present invention; Figure 7 This is a flowchart of the construction method for the combined expansion joint of the present invention. In the diagram: 1. Matrix; 2. Expansion joint; 3. Anchor-type insert plate; 4. Hook-type anchor; 5. Positioning hole; 6. Flat iron edge; 7. Horizontal insertion cavity; 8. Stainless steel drainage channel; 9. Joint opening; 10. Silicone lining; 11. Steel plate; 12. Stone; 13. Horizontal insertion; 14. Expansion gap; 15. Elastic grout; 16. Asbestos-embedded hemp fiber asphalt; 17. Styrene-butadiene rubber elliptical cylinder; 18. Fire-resistant strip; 19. Joint filler 20. Damping tube; 21. Side telescopic component; 22. Return spring; 23. Positioning rod part; 24. Movable cavity; 25. Damping friction surface; 26. Abutment plate; 27. Hinge ear; 28. Connecting rod; 29. ​​Easy-to-remove expansion bolt; 30. Tapered rod; 31. External support rod; 32. Expansion sleeve; 33. Nut locking part; 34. Trapezoidal head; 35. Threaded part; 36. Drain pipe; 37. Drainage conveying pipe. Detailed Implementation

[0011] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0012] Please see Figure 1-7 A building construction floor expansion joint structure includes a base 1, an expansion joint 2 on the base 1, an anchor-type insert plate 3 inside the base 1, a hook-type anchor part 4 and a positioning insertion hole 5 on the anchor-type insert plate 3, a pressure-edge flat iron 6 on the floor surface of the base 1, a horizontal insertion cavity 7 on the pressure-edge flat iron 6, a stainless steel water channel 8 on the pressure-edge flat iron 6, a slot 9 in the middle of the stainless steel water channel 8, a silicone lining 10 installed in the slot 9, and a steel plate part 11 on the stainless steel water channel 8. The steel plate part 11 and the pressure-edge flat iron are connected... The upper part of 6 is covered with stone 12, and a horizontal insertion part 13 is provided on the steel plate part 11. An expansion gap 14 is provided between the side of the steel plate part 11 and the side of the pressing flat iron 6. The horizontal insertion part 13 is inserted into the horizontal insertion cavity 7. The expansion gap 14 and the horizontal insertion cavity 7 are filled with elastic glue 15. The bottom of the stainless steel water ditch 8 is provided with a settlement expansion mechanism. The settlement expansion mechanism is inserted into the positioning insertion hole 5. Below the settlement expansion mechanism, there are asbestos-embedded hemp fiber asphalt 16, styrene-butadiene rubber elliptical cylinder 17, fire-resistant strip 18 and joint filling layer 19 arranged in sequence.

[0013] In this embodiment, the structure of the present invention is scientifically and rationally designed. Anchor-type insert plates 3 are pre-embedded within the base 1, and hook-type anchor parts 4 form a stable structure with the base 1, making the anchor-type insert plates 3 fixed. During the installation of the stainless steel water ditch 8, the settlement expansion mechanism is pre-assembled at the bottom of the stainless steel water ditch 8, and then assembled with the pressure-edge flat iron 6. The stainless steel water ditch 8 is horizontally inserted into the horizontal insertion cavity 7 through the horizontal insertion part 13 of the steel plate part. An expansion gap 14 is provided between the side of the steel plate part 11 and the side of the pressure-edge flat iron 6. The expansion gap 14 and the horizontal insertion cavity 7 are filled with elastic grout 15. When the expansion joint structure expands or contracts, the elasticity of the elastic grout 15 allows the top of the stainless steel water ditch 8 and the pressure-edge flat iron 6 to effectively follow the expansion and contraction. Furthermore, the settlement expansion mechanism at the bottom of the stainless steel water ditch 8 effectively controls the settlement of the expansion joint. The expansion joint effectively mitigates structural deformation through expansion and contraction, while the silicone lining 10 installed at the joint 9 provides a certain degree of waterproofing to the floor. Even if the silicone lining 10 leaks, the water will drain into the stainless steel drainage ditch 8, thus achieving a second line of waterproofing. Furthermore, the horizontal insertion structure is connected by elastic glue injection 15, which also effectively achieves a waterproofing effect. This structure is relatively simple to operate and has a long service life. Secondly, the styrene-butadiene rubber elliptical column 17, based on its own tensile strength characteristics, allows the expansion joint structure to adapt to longitudinal settlement deformation and lateral expansion and contraction deformation. By laying asbestos-embedded hemp fiber asphalt 16 on the styrene-butadiene rubber elliptical column 17, a better leak-stopping effect is achieved, and the fire-resistant strip 18 provides a fire-resistant effect, improving the fire resistance of the building. In addition, the joint filling layer 19 can consolidate the bottom of the expansion joint.

[0014] Specifically, the number of positioning holes 5 is determined according to the width of the expansion joint. Anchor-type inserts 3 are prefabricated and mass-produced. Elastic adhesive 15 not only provides elastic expansion and contraction but also serves a connecting function. Stone 12 provides reinforcement. Fire-retardant tape 18 uses Kevlar webbing, offering fire resistance and high-temperature resistance, withstanding temperatures above 300 degrees Celsius, and providing permanent flame retardancy, making it highly usable.

[0015] Furthermore, the settlement telescopic mechanism includes a damping tube 20, a side telescopic component 21, a return spring 22, and a positioning rod part 23. The damping tube 20 is provided with a movable cavity 24. The top and bottom surfaces of the movable cavity 24 are provided with damping friction surfaces 25. The side telescopic component 21 is provided with an abutment plate 26. The abutment plate 26 and the damping friction surface 25 move laterally with damping. The return spring 22 is located between the abutment plates 26. The side telescopic component 21 is provided with a hinge ear 27. The bottom of the stainless steel water ditch 8 is provided with a connecting rod 28. The connecting rod 8 is hinged to the hinge ear 27. The positioning rod part 23 is inserted into the positioning hole 5.

[0016] In this embodiment, the side expansion member 21 extends and retracts laterally via the return spring 22. During the extension and retraction process, the abutment plate 26 and the damping friction surface 25 exhibit lateral damping movement. The damping friction surface 25 serves as a damping mechanism for the extension and retraction, providing a lateral expansion and retraction buffer for the expansion joint structure. Furthermore, when the expansion joint structure experiences settlement, the stainless steel water ditch 8 exerts a downward force through the connecting rod 28. At this time, the connecting rod 28 rotates and presses against the hinge ear 27 of the side expansion member 21, causing the side expansion member 21 to retract inward. During the extension and retraction process, the abutment plate 26 and the damping friction surface 25 exhibit lateral damping movement. The damping friction surface 25 serves as a damping mechanism for the extension and retraction, providing a expansion and retraction buffer for the settlement of the expansion joint structure. The positioning insert 23 is inserted into the positioning insert 5, ensuring the stainless steel water ditch 8 is securely positioned and installed.

[0017] Furthermore, a removable expansion bolt 29 is installed between the pressure flat iron 6 and the base 1. The removable expansion bolt 29 includes a tapered rod 30, an outer support rod 31, an expansion sleeve 32, and a nut locking member 33. The outer support rod 31 is provided with a trapezoidal head 34, which abuts against the expansion sleeve 32. The nut locking member 33 is provided with a threaded part 35, which is threadedly installed with the expansion sleeve 32 to position the outer support rod 31.

[0018] In this embodiment, by setting the easy-to-remove expansion bolt 29, during installation, the outer support rod 31 is adjusted upward so that the trapezoidal head 34 abuts against the expansion sleeve 32, and then the nut locking member 33 is threaded on, so that the nut locking member 33 and the outer support rod 31 are inwardly squeezed and locked, which allows the expansion sleeve 32 to expand. Conversely, by unscrewing the nut locking member 33, the outer support rod 31 can be easily disassembled. This structure can facilitate the installation or disassembly of the pressure flat iron 6, and facilitate maintenance.

[0019] Furthermore, a drain pipe 36 is installed at the bottom of the stainless steel ditch 8, and a drainage conveying pipe 37 is installed on the drain pipe 36.

[0020] In this embodiment, the structure enables efficient drainage of water from the stainless steel ditch 8.

[0021] Furthermore, the elastic potting compound 15 is a modified rubber-type potting compound.

[0022] In this embodiment, a modified rubber-based potting compound is used, which has better vibration resistance, high temperature resistance, rapid curing and good adhesion. A dedicated potting equipment is used for potting.

[0023] Furthermore, the styrene-butadiene rubber elliptical cylinder 17 is made of modified emulsion styrene-butadiene rubber material, including 23% styrene content, 3% acrylamide content and 72% butadiene content.

[0024] In this embodiment, the material has high tensile strength and low rolling resistance.

[0025] Furthermore, the joint filler layer 19 is filled with foam mortar.

[0026] In this embodiment, foam mortar is used as a filler, which is elastic and forms a whole after filling, achieving a seamless overlap.

[0027] A construction method for a combined expansion joint structure for floor and ground expansion joints in building engineering, characterized by the following steps: (1) Expansion joint retention and pre-embedding: During building construction, expansion joint 2 is reserved between adjacent base 1, and anchor-type insert plate 3 is pre-embedded on base 1 at front and back intervals, wherein the insert plate part of the anchor-type insert plate 3 is exposed at the expansion joint 2. (2) Install fire-resistant strips: Fire-resistant strips 18 are embedded in the expansion joints 2 using their own elasticity; (3) Install styrene-butadiene rubber elliptical columns: The styrene-butadiene rubber elliptical columns 17 are physically pushed into place between the expansion joints 2 and located above the fire-resistant strip 18, adapting to longitudinal settlement deformation capacity and lateral expansion and compression deformation capacity. (4) Laying asbestos-embedded hemp fiber asphalt: Lay asbestos-embedded hemp fiber asphalt 16 on top of styrene-butadiene rubber elliptical column 17, melt the asphalt and sprinkle it into the asphalt hemp fiber and sprinkle it vertically into the expansion joint. Then clean and dry the expansion joint 2. After filling, sprinkle talcum powder on both sides of the expansion joint 2, heat and melt the asphalt and pour it onto the asphalt hemp fiber. After solidification and cooling, remove the excess asphalt. (5) Assemble the stainless steel water ditch, the pressure flat iron and the settlement expansion mechanism: First, the anchor type insert plate 3 is set at intervals in front and back. The number of settlement expansion mechanisms is matched with the positioning insertion holes 5 on the anchor type insert plate 3. The settlement expansion mechanism is designed and manufactured first. Then, the hinge ear 27 is used to achieve rotational installation with the connecting rod 28 at the bottom of the stainless steel water ditch 8. Then, the horizontal insertion part 13 of the steel plate part 11 on the stainless steel water ditch 8 is inserted into the horizontal insertion cavity 7 to achieve longitudinal limit installation. Before installation, the horizontal insertion cavity 7 is filled with elastic glue 15, and then the external expansion gap 14 is filled with elastic glue 15 again. (6) Installation of the settlement telescopic mechanism: The positioning rod part 23 is positioned and lowered into the positioning hole 5, and the anchor plate part 3 limits and supports it; (7) Stone reinforcement: Stone 12 is laid on the expansion gap 14, the steel plate part 11 of the stainless steel water ditch 8 and the edge flat iron 6 for reinforcement and decoration; (8) Construction of joint filler layer: Fill the bottom of expansion joint 2 with joint filler layer 19, and the construction is completed.

[0028] Through the implementation of the above construction methods, anchor-type insert plates 3 are first pre-embedded in the base 1, and hook-type anchors 4 form a stable structure with the base 1. The styrene-butadiene rubber elliptical columns 17 and fire-resistant strips 18 are easily installed, making the expansion joint structure able to adapt to longitudinal settlement deformation and lateral expansion and compression deformation. The construction process of embedding asbestos, hemp fiber, and asphalt 16 achieves a good leak-stopping effect. The stainless steel water ditch 8, the edge flat iron 6, and the settlement expansion mechanism are assembled using an outdoor prefabrication method to facilitate subsequent finished product installation, which is also relatively convenient. The elasticity of the elastic grout 15 is utilized to ensure that the top of the stainless steel water ditch 8 and the edge flat iron 6 are aligned. The iron 6 effectively follows the expansion and contraction. Secondly, the settlement and expansion mechanism at the bottom of the stainless steel water ditch 8 effectively alleviates the settlement or expansion of the expansion joint 2, reducing structural deformation. The joint opening 9 is equipped with silicone lining 10, which can play a certain role in waterproofing the floor. Even if the silicone lining 10 leaks, the water will be drained into the stainless steel water ditch 8, thus achieving a second line of waterproofing. Finally, the joint filling layer 19 can provide a flexible and reinforced connection at the bottom of the expansion joint 2. Compared with existing technologies, this process achieves better waterproofing, does not affect structural deformation, and greatly improves service life. Therefore, it can be widely promoted and has great construction value.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A building floor expansion joint structure, characterized in that: The system includes a base (1), on which expansion joints (2) are provided. An anchor-type insert plate (3) is provided inside the base (1). The anchor-type insert plate (3) is provided with hook-type anchor (4) and positioning insertion hole (5). A pressing flat iron (6) is provided on the floor surface of the base (1). A horizontal insertion cavity (7) is provided on the pressing flat iron (6). A stainless steel water ditch (8) is provided on the pressing flat iron (6). A slot (9) is opened in the middle of the stainless steel water ditch (8). A silicone lining (10) is installed on the slot (9). A steel... The plate part (11) is covered with stone (12) on the upper part of the steel plate part (11) and the pressing flat iron (6). A horizontal insertion part (13) is provided on the steel plate part (11). A telescopic gap (14) is provided between the side of the steel plate part (11) and the side of the pressing flat iron (6). The horizontal insertion part (13) is inserted into the horizontal insertion cavity (7). The telescopic gap (14) and the horizontal insertion cavity (7) are filled with elastic potting compound (15). The elastic potting compound (15) is a modified rubber type potting compound. A settlement telescopic mechanism is provided at the bottom of the stainless steel water ditch (8). The settlement telescopic mechanism is inserted into the water ditch. On the positioning socket (5), the settlement telescopic mechanism includes a damping tube (20), a side telescopic member (21), a return spring (22), and a positioning plug part (23). The damping tube (20) is provided with a movable cavity (24). The top and bottom surfaces of the movable cavity (24) are provided with damping friction surfaces (25). The side telescopic member (21) is provided with an abutment plate (26). The abutment plate (26) and the damping friction surface (25) move laterally with damping. The return spring (22) is located between the abutment plates (26). The side telescopic member (21) is provided with a hinge ear (27). The bottom of the stainless steel water ditch (8) is provided with a connecting rod (28), which is hinged to the hinge ear (27). The positioning plug part (23) is inserted into the positioning plug hole (5). Below the settlement telescopic mechanism, there are asbestos-embedded hemp fiber asphalt (16), styrene-butadiene rubber elliptical cylinder (17), fire-resistant strip (18) and joint filler (19) in sequence. The styrene-butadiene rubber elliptical cylinder (17) is made of modified latex styrene-butadiene rubber material, including 23% styrene, 3% acrylamide and 72% butadiene. The joint filler (19) is filled with foam mortar.

2. The building floor expansion joint structure according to claim 1, characterized in that: A removable expansion bolt (29) is installed between the pressing flat iron (6) and the base (1). The removable expansion bolt (29) includes a tapered rod (30), an outer support rod (31), an expansion sleeve (32), and a nut locking member (33). A trapezoidal head (34) is provided on the outer support rod (31), and the trapezoidal head (34) abuts against the expansion sleeve (32). The nut locking member (33) is provided with a threaded part (35), and the threaded part (35) and the expansion sleeve (32) are threadedly installed to position the outer support rod (31).

3. The building floor expansion joint structure according to claim 1, characterized in that: The bottom of the stainless steel ditch (8) is provided with a drain pipe (36), and a drainage conveying pipe (37) is provided on the drain pipe (36).

4. A construction method for a combined expansion joint structure for floor and ground expansion joints in building engineering, characterized in that: The implementation of the building floor expansion joint structure according to claim 1 specifically includes the following steps: (1) Expansion joint retention and pre-embedding: During building construction, expansion joints (2) are reserved between adjacent bases (1), and anchor-type insert plates (3) are pre-embedded on the bases (1) at front and back intervals, wherein the insert plate part of the anchor-type insert plate (3) is exposed at the expansion joint (2); (2) Install fire-resistant strips: The fire-resistant strips (18) are embedded in the expansion joints (2) using their own elasticity; (3) Install styrene-butadiene rubber elliptical columns: The styrene-butadiene rubber elliptical columns (17) are physically pushed into place between the expansion joints (2) and located above the fire-resistant strip (18) to adapt to longitudinal settlement deformation capacity and lateral expansion and compression deformation capacity. (4) Laying asbestos-embedded hemp fiber asphalt: Lay asbestos-embedded hemp fiber asphalt (16) on top of the styrene-butadiene rubber elliptical column (17), melt the asphalt and sprinkle it into the asphalt hemp fiber and sprinkle it vertically into the expansion joint (2), then clean and dry the expansion joint (2), after filling it, sprinkle talcum powder on both sides of the expansion joint (2), heat and melt the asphalt and pour it onto the asphalt hemp fiber, after solidification and cooling, remove the excess asphalt; (5) Assemble the stainless steel water ditch, the edge flat iron and the settlement expansion mechanism: First, the anchor type insert plate (3) is set in a front and back interval. The number of settlement expansion mechanisms is matched with the positioning insertion hole (5) on the anchor type insert plate (3). The settlement expansion mechanism is designed and manufactured first. Then, the hinge ear (27) and the connecting rod (28) at the bottom of the stainless steel water ditch (8) are used to achieve rotational installation. Then, the horizontal insertion part (13) of the steel plate part (11) on the stainless steel water ditch (8) is inserted into the horizontal insertion cavity (7) to achieve longitudinal limit installation. Before installation, the horizontal insertion cavity (7) is filled with elastic glue (15). Then, the external expansion gap (14) is filled with elastic glue (15). (6) Installation of the settlement telescopic mechanism: The positioning rod (23) is used to position and lower the mechanism into the positioning hole (5), and the anchor plate (3) provides limiting support for it. (7) Stone reinforcement: Stone (12) is laid on the expansion gap (14), the steel plate part (11) of the stainless steel water channel (8) and the edge flat iron (6) for reinforcement and decoration; (8) Filling layer construction: Fill the bottom of the expansion joint (2) with the filling layer (19) to complete the construction.

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