Fabricated profile steel telescopic device and mounting method thereof

Abstract

The invention discloses an assembly type profile steel telescopic device and an installation method thereof.The telescopic device comprises a prefabricated part assembly, a steel plate assembly and a detachable reinforcing assembly, the steel plate assembly is detachably embedded in the prefabricated part assembly, and the detachable reinforcing assembly detachably connects the prefabricated part assembly and the steel plate assembly into a contraction joint notch; the prefabricated part assembly is provided with a first notch and a second notch, the steel plate assembly comprises first deformed steel and second deformed steel, the first deformed steel is arranged in the first notch, the second deformed steel is arranged in the second notch, and a water stop belt formed in a cast-in-place mode is arranged between the first deformed steel and the second deformed steel. The prefabricated part assembly and the steel plate assembly are of an assembly type structure and are detachably connected with the bridge body through the detachable reinforcing assembly, and therefore the replacement efficiency of the expansion joint structure is high. The two sides of the water stop belt formed through cast-in-place are embedded in the first deformed steel and the second deformed steel correspondingly, and the stability and durability of the expansion joint structure are guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of bridge construction, and in particular to an assembled steel expansion device and an installation method thereof. Background Art

[0002] The main function of bridge expansion joints is to adapt to the expansion and contraction deformation of the bridge under temperature changes and loads, ensuring the safety and service life of the bridge. Expansion joints are usually set between the two beam ends, between the beam ends and the abutments, or at the hinged positions of the bridge. They are a vital component of the bridge structure.

[0003] Expansion joint structures are usually set on the bridge beams on both sides of the bridge expansion joint. In actual applications, existing expansion joint structures still have problems such as material aging, structural damage, water leakage and vehicle jumping. These problems not only affect the performance of the bridge, but also increase maintenance costs and safety risks. When the expansion joint structure is damaged and its service life can no longer be extended by repair, it is usually necessary to replace the entire expansion joint structure. The replacement process includes time-consuming steps such as crushing and chiseling concrete, pouring concrete, and curing. In addition, the road needs to be closed for a long time, which not only affects traffic, but also requires long-term on-site operations, making it difficult to control the quality of on-site construction. Summary of the invention

[0004] To this end, the present application provides a prefabricated steel expansion device and an installation method thereof to solve the technical problems of low replacement efficiency and poor durability of expansion joint structures in the prior art.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A first aspect of the present invention provides an assembled steel expansion device, comprising:

[0007] A prefabricated component assembly, comprising a first prefabricated component and a second prefabricated component, wherein the first prefabricated component is detachably arranged in a first expansion joint slot on a bridge beam body at one side of a bridge expansion joint, and the second prefabricated component is detachably arranged in a second expansion joint slot on a bridge beam body at the other side of the bridge expansion joint, a first slot is arranged on one side of a top of the first prefabricated component, a second slot is arranged on one side of a top of the second prefabricated component, the first slot and the second slot are arranged opposite to each other, and the first slot and the second slot are arranged on both sides of the bridge expansion joint;

[0008] A steel plate assembly, comprising a first steel plate and a second steel plate, wherein the first steel plate is detachably embedded in the top of the first prefabricated component, and the second steel plate is detachably embedded in the top of the second prefabricated component, the first steel plate comprises a first special-shaped steel, and the second steel plate comprises a second special-shaped steel, the first special-shaped steel is arranged in the first notch, and the second special-shaped steel is arranged in the second notch, and a waterstop formed by cast-in-situ is arranged between the first special-shaped steel and the second special-shaped steel, and two sides of the waterstop are respectively embedded in the first special-shaped steel and the second special-shaped steel;

[0009] A detachable reinforcement assembly is used to detachably connect the prefabricated component assembly and the steel plate assembly in the first expansion joint notch and the second expansion joint notch.

[0010] Optionally, the first steel plate includes a first comb-tooth structure, the first comb-tooth structure is integrally formed with the first special-shaped steel, the first comb-tooth structure is arranged on a side of the first special-shaped steel away from the second special-shaped steel, a first accommodating groove for accommodating the first comb-tooth structure is arranged on the first prefabricated component, and the first steel plate and the first prefabricated component form a first plane;

[0011] The second steel plate includes a second comb-tooth structure, the second comb-tooth structure is integrally formed with the second special-shaped steel, the second comb-tooth structure is arranged on a side of the second special-shaped steel away from the first special-shaped steel, a second receiving groove for receiving the second comb-tooth structure is arranged on the second prefabricated component, and the second steel plate and the second prefabricated component form a second plane;

[0012] The first plane and the second plane are flush with the bridge deck of the bridge beam.

[0013] Further optionally, a detachable reinforcement component is fixedly installed on the bottom surface of the first expansion joint slot and the bottom surface of the second expansion joint slot, respectively, and the detachable reinforcement component includes an anchoring bar, a fixing steel bar and an anti-loosening bolt. Both ends of the anchoring bar are buried in the bridge beam and form a fastening ring between the bridge beam and the fixing steel bar. The fixing steel bar is arranged on the bridge beam along the width direction of the bridge beam, and the fixing steel bar is fastened in the fastening ring. Anchor holes are arranged on the fixing steel bar, and one end of the anti-loosening bolt is fixed in the anchor hole. The anti-loosening bolt is detachably connected to the prefabricated component assembly and the steel plate assembly.

[0014] Further optionally, anchor bolt through holes are correspondingly arranged on the first comb-tooth structure and in the first accommodating groove, anchor bolt through holes are correspondingly arranged on the second comb-tooth structure and in the second accommodating groove, bolt caps are arranged in the anchor bolt through holes of the first comb-tooth structure and the second comb-tooth structure, and the anti-loosening bolt is tightened with the bolt cap after passing through the anchor bolt through holes.

[0015] Further optionally, the first prefabricated component and the second prefabricated component are provided with bottom grooves, and the bottom grooves are used to embed the anchoring reinforcement and the fixing steel bar.

[0016] Optionally, both the first prefabricated component and the second prefabricated component are ultra-high performance concrete components.

[0017] Optionally, the waterstop is made of liquid rubber, and the thickness of the waterstop is the same as the thickness of the first special-shaped steel and the second special-shaped steel.

[0018] Optionally, the first special-shaped steel and the second special-shaped steel are both provided with open slots, and the open slots are used to connect the water stop belt.

[0019] The second aspect of the present invention provides an installation method of an assembled steel expansion device, which is used to install the assembled steel expansion device provided by the first aspect of the present invention, comprising:

[0020] Install the detachable reinforcement assembly, place the fixed steel bar with the anti-loosening bolts placed in advance on the bottom surface of the first expansion joint notch and the bottom surface of the second expansion joint notch, cover the fixed steel bar with anchoring bars, and embed the two ends of the anchoring bars in the bridge beam. The fastening ring formed between the anchoring bars and the bridge beam fastens the fixed steel bar to the bridge beam, and the contact surface between the anchoring bars and the fixed steel bar is welded;

[0021] Install the prefabricated component assembly, align the anchor bolt through hole provided in the first receiving groove with the anti-loosening bolt on the fixed steel bar, lower the first prefabricated component and place it in the first expansion joint notch, so that the anchoring bar and the fixed steel bar in the first expansion joint notch are embedded in the bottom slot of the first prefabricated component, align the anchor bolt through hole provided in the second receiving groove with the anti-loosening bolt on the fixed steel bar, lower the second prefabricated component and place it in the second expansion joint notch, so that the anchoring bar and the fixed steel bar in the second expansion joint notch are embedded in the bottom slot of the second prefabricated component;

[0022] Install the steel plate assembly, align the first special-shaped steel of the first steel plate with the first notch, the first comb-tooth structure with the first receiving groove, and the anchor bolt through hole on the first comb-tooth structure with the anti-loosening bolt, then install the first steel plate on the first prefabricated component, align the second special-shaped steel of the second steel plate with the second notch, the second comb-tooth structure with the second receiving groove, and the anchor bolt through hole on the second comb-tooth structure with the anti-loosening bolt, then install the second steel plate on the second prefabricated component, tighten the anti-loosening bolts in the anchor bolt through holes on the first comb-tooth structure and the second comb-tooth structure with bolt nuts, set the end of the anti-loosening bolt below the top surface of the steel plate assembly, and pour epoxy resin into the anchor bolt through hole;

[0023] Casting water stop, the water stop is cast with liquid rubber.

[0024] Optionally, the pouring of the waterstop includes installing a template between the first special-shaped steel and the second special-shaped steel, the template is arranged at the bottom and sides of the first special-shaped steel and the second special-shaped steel, the template wraps the expansion joint between the first special-shaped steel and the second special-shaped steel to form an enclosing groove, and liquid rubber is poured into the enclosing groove until the liquid rubber fills the expansion joint and the open slot between the first special-shaped steel and the second special-shaped steel.

[0025] Compared with the prior art, this application has at least the following beneficial effects:

[0026] A prefabricated steel expansion device, comprising a prefabricated component assembly, a steel plate assembly and a detachable reinforcement assembly, wherein the prefabricated component assembly comprises a first prefabricated component and a second prefabricated component, the first prefabricated component is detachably arranged in a first expansion joint notch on a bridge beam body on one side of the bridge expansion joint, and the second prefabricated component is detachably arranged in a second expansion joint notch on a bridge beam body on the other side of the bridge expansion joint, the steel plate assembly comprises a first steel plate and a second steel plate, the first steel plate is detachably embedded in the top of the first prefabricated component, and the second steel plate is detachably embedded in the top of the second prefabricated component, the detachable reinforcement assembly detachably connects the prefabricated component assembly and the steel plate assembly to the first expansion joint notch and the second expansion joint notch, and at the same time, a first notch is arranged on one side of the top of the first prefabricated component, and a second notch is arranged on one side of the top of the second prefabricated component, the first notch and the second notch are arranged opposite to each other, and ... A notch and a second notch are arranged on both sides of the bridge expansion joint, the first steel plate includes a first special-shaped steel, the second steel plate includes a second special-shaped steel, the first special-shaped steel is arranged in the first notch, the second special-shaped steel is arranged in the second notch, and a waterstop cast on site is arranged between the first special-shaped steel and the second special-shaped steel, and the two sides of the waterstop are respectively embedded in the first special-shaped steel and the second special-shaped steel. In this way, an assembled structure is adopted between the prefabricated component assembly and the steel plate assembly, and then the assembly is detachably connected to the bridge beam body through a detachable reinforcement assembly, thereby achieving a technical effect of high efficiency in replacing the expansion joint structure; in addition, the two sides of the waterstop cast on site are respectively embedded in the first special-shaped steel and the second special-shaped steel, and the connection of the waterstop is no longer a weak link in the entire expansion device, which not only adapts to the expansion and contraction deformation of the bridge expansion joint, but also ensures the stability and durability of the expansion joint structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more intuitively illustrate the prior art and the present application, exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, those skilled in the art are capable of easily making conventional adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components) based on the technical concepts and exemplary drawings disclosed in the present application.

[0028] Figure 1 An exploded structural diagram of an assembled steel expansion device provided in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of the structure of anchoring door bars and fixing steel bars of an assembled steel expansion and contraction device provided in an embodiment of the present application;

[0030] Figure 3 A schematic structural diagram of a prefabricated component assembly of an assembled steel expansion device provided in an embodiment of the present application;

[0031] Figure 4 A schematic structural diagram of a steel plate assembly of an assembled steel section expansion and contraction device provided in an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 1. First prefabricated component; 101. First notch; 102. First receiving groove; 2. Second prefabricated component; 201. Second notch; 202. Second receiving groove; 3. First steel plate; 301. First special-shaped steel; 302. First comb-tooth structure; 303. Open slot; 4. Second steel plate; 401. Second special-shaped steel; 402. Second comb-tooth structure; 5. Waterstop; 6. Anchoring reinforcement; 7. Fixing steel bar; 8. Anti-loosening bolt; 9. Anchor bolt through hole; 10. First expansion joint notch; 11. Second expansion joint notch; 12. Bridge deck. DETAILED DESCRIPTION

[0034] The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0035] The purpose of the present invention is to provide an assembled steel expansion device and an installation method thereof, the main purpose of which is to solve the technical problems of low replacement efficiency and poor durability of expansion joint structures.

[0036] refer to Figure 1-4 As shown, this embodiment provides an assembled steel expansion device, including a prefabricated component assembly, a steel plate assembly and a detachable reinforcement assembly, the prefabricated component assembly includes a first prefabricated component 1 and a second prefabricated component 2, the first prefabricated component 1 is detachably arranged in a first expansion joint slot 10 on a bridge beam body on one side of the bridge expansion joint, the second prefabricated component 2 is detachably arranged in a second expansion joint slot 11 on a bridge beam body on the other side of the bridge expansion joint, the steel plate assembly includes a first steel plate 3 and a second steel plate 4, the first steel plate 3 is detachably embedded in the top of the first prefabricated component 1, and the second steel plate 4 is detachably embedded in the top of the second prefabricated component 2. Among them, a first notch 101 is provided on one side of the top of the first prefabricated component 1, and a second notch 201 is provided on one side of the top of the second prefabricated component 2. The first notch 101 and the second notch 201 are arranged opposite to each other, and the first notch 101 and the second notch 201 are arranged on both sides of the expansion joint of the bridge. The first steel plate 3 includes a first special-shaped steel 301, and the second steel plate 4 includes a second special-shaped steel 401. The first special-shaped steel 301 is arranged in the first notch 101, and the second special-shaped steel 401 is arranged in the second notch 201.

[0037] The distance between the first special-shaped steel 301 and the second special-shaped steel 401 is the width of the bridge expansion joint. A cast-in-place waterstop 5 is arranged between the first special-shaped steel 301 and the second special-shaped steel 401. Both sides of the waterstop 5 are respectively embedded in the first special-shaped steel 301 and the second special-shaped steel 401. Specifically, the first special-shaped steel 301 and the second special-shaped steel 401 are provided with opening slots 303 with openings arranged opposite to each other, the width of the bottom of the opening slot 303 is greater than the width of the opening, and the cross-sectional shape of the opening slot 303 is preferably a transverse "T" shape, and the two sides of the waterstop 5 are respectively embedded in the opening slot 303, wherein the waterstop 5 is cast on site, and the waterstop 5 is preferably made of liquid rubber, and the liquid rubber is cast between the first special-shaped steel 301 and the second special-shaped steel 401. Before casting, the expansion joint between the first special-shaped steel 301 and the second special-shaped steel 401 is first wrapped with a template, and then liquid rubber is poured into the expansion joint until the liquid rubber fills the opening slot 303 and the expansion joint between the first special-shaped steel 301 and the second special-shaped steel 401. After the liquid rubber is shaped, the waterstop 5 is formed, and the two sides of the waterstop 5 are fixedly embedded in the opening slot 303. The thickness of the waterstop 5 is the same as that of the first special-shaped steel 301 and the second special-shaped steel 401. With this arrangement, the waterstop 5 not only has good expansion and contraction ductility and adhesion with the first special-shaped steel 301 and the second special-shaped steel 401, but also the connection of the waterstop 5 is no longer the weak link of the entire expansion device. It not only adapts to the expansion and contraction deformation of the bridge expansion joint, but also increases the flatness of the expansion device. At the same time, compared with the traditional waterstop 5, the waterstop 5 of the present application is not only sealed and leak-proof, but also will not retain impurities such as mud and sand, thereby ensuring the stability and durability of the expansion joint structure.

[0038] The prefabricated component assembly and the steel plate assembly are detachably connected to the first expansion joint notch 10 and the second expansion joint notch 11 by using a detachable reinforcement assembly. In this way, the prefabricated component assembly and the steel plate assembly are detachably connected to the bridge beam body by using an assembled structure, thereby achieving a technical effect of high efficiency in replacing the expansion joint structure.

[0039] The first precast component 1 and the second precast component 2 are both ultra-high performance concrete (UHPC) components, which have high strength and durability, and further improve the durability of the expansion joint structure.

[0040] In an optional embodiment of the present application, the first steel plate 3 includes a first comb-tooth structure 302, which is integrally formed with the first special-shaped steel 301, and is arranged on a side of the first special-shaped steel 301 away from the second special-shaped steel 401. The first prefabricated component 1 is provided with a first accommodating groove 102 for accommodating the first comb-tooth structure 302, and the first steel plate 3 and the first prefabricated component 1 form a first plane; the second steel plate 4 includes a second comb-tooth structure 402, which is integrally formed with the second special-shaped steel 401, and the second comb-tooth structure 402 is arranged on a side of the second special-shaped steel 401 away from the first special-shaped steel 301. The second prefabricated component 2 is provided with a second accommodating groove 202 for accommodating the second comb-tooth structure 402, and the second steel plate 4 and the second prefabricated component 2 form a second plane, and the first plane and the second plane are flush with the bridge deck 12 of the bridge beam. In this way, by combining the first receiving groove 102 with the first comb-tooth structure 302, the first steel plate 3 can be more stably and detachably embedded in the top of the first prefabricated component 1, and by combining the second receiving groove 202 with the second comb-tooth structure 402, the second steel plate 4 can be more stably and detachably embedded in the top of the second prefabricated component 2. While ensuring the stability of the device, the telescopic device also adopts the first steel plate 3 and the second steel plate 4 to be comb-tooth structures, which greatly saves the use of steel. The first plane and the second plane are flush with the bridge deck 12 of the bridge beam body, and there is no need to pave the upper surface of the telescopic device with asphalt, which improves the construction efficiency. It should be noted that in order to further ensure the durability of the telescopic device, the thickness of the first special-shaped steel 301 of the telescopic device is greater than the thickness of the first comb-tooth structure 302, and the thickness of the second special-shaped steel 401 is greater than the thickness of the second comb-tooth structure 402. The gap on the upper surface of the telescopic device can be filled with waterproof glue to improve the overall firmness and waterproof effect of the telescopic device.

[0041] In an optional embodiment of the present application, a detachable reinforcement component is fixedly installed on the bottom surface of the first expansion joint slot 10 and the bottom surface of the second expansion joint slot 11, respectively, and the detachable reinforcement component includes an anchoring bar 6, a fixed steel bar 7 and an anti-loosening bolt 8. Both ends of the anchoring bar 6 are buried in the bridge beam and form a fastening ring between the bridge beam and the bridge beam. The fixed steel bar 7 is arranged on the bridge beam along the width direction of the bridge beam. The fixed steel bar 7 is fastened in the fastening ring by the anchoring bar 6. Anchor holes are arranged on the fixed steel bar 7, and anti-loosening bolts 8 are arranged in the anchor holes. The anti-loosening bolts 8 are detachably connected to the prefabricated component assembly and the steel plate assembly.

[0042] A plurality of anchoring bars 6 are arranged at equal intervals in the length direction of the fixed steel bar 7, and the contact surface between the anchoring bars 6 and the fixed steel bar 7 can be fixed again by welding to achieve a better fixation effect of the fixed steel bar 7.

[0043] A plurality of fixed steel bars 7 are arranged on the horizontal plane of the first expansion joint notch 10 and the horizontal plane of the second expansion joint notch 11. Only one fixed steel bar 7 may be fixed in the fastening circle formed by each anchoring door reinforcement 6, or two or three fixed steel bars 7 may be fixed side by side.

[0044] A plurality of anchor holes are arranged at equal intervals on the fixed steel bar 7, and the anchor holes are arranged in a staggered manner with the anchoring door reinforcement 6, and anti-loosening bolts 8 are arranged in the anchor holes. Anchor holes 9 are correspondingly arranged on the first comb-tooth structure 302 and in the first receiving groove 102, and anchor holes 9 are correspondingly arranged on the second comb-tooth structure 402 and in the second receiving groove 202. The anti-loosening bolts 8 pass through the anchor holes 9 to detachably connect the prefabricated component assembly and the steel plate assembly to the first expansion joint notch 10 and the second expansion joint notch 11. The detachable reinforcement assembly not only strengthens the stability of the prefabricated component assembly and the steel plate assembly, but also facilitates the replacement of the prefabricated component assembly and the steel plate assembly.

[0045] Bolt caps are provided in the anchor holes 9 of the first comb-tooth structure 302 and the second comb-tooth structure 402, and the bolt caps are tightened onto the anti-loosening bolts 8. It should be noted that the tops of the bolt caps and the tops of the anti-loosening bolts 8 after tightening are not higher than the bridge deck 12, and the shape of the bolt caps is preferably an integrated anti-slip bolt cap with an enlarged bottom surface, that is, the bottom edge of the bolt cap extends around to increase the contact area between the bolt cap and the edge of the anchor hole 9.

[0046] The first prefabricated component 1 and the second prefabricated component 2 are provided with bottom grooves, which are used to embed the anchoring door bars 6 and the fixing steel bars 7, so that the protruding structures on the horizontal plane of the first expansion joint notch 10 and the horizontal plane of the second expansion joint notch 11 are embedded in the bottom grooves, so that the prefabricated component assembly can be stably placed in the first expansion joint notch 10 and the second expansion joint notch 11, further increasing the stability of the expansion joint structure.

[0047] This embodiment also provides an installation method of an assembled steel expansion device, which is used to install the assembled steel expansion device of the above embodiment, and specifically includes the following steps:

[0048] Step S1, install the detachable reinforcement component, place the fixed steel bar 7 with anti-loosening bolts 8 placed in advance horizontally on the bottom surface of the first expansion joint slot 10 and the bottom surface of the second expansion joint slot 11 on the bridge beam, the anchoring bar 6 covers the fixed steel bar 7, and the two ends of the anchoring bar 6 are buried in the bridge beam. The fastening ring formed between the anchoring bar 6 and the bridge beam fastens the fixed steel bar 7 to the bridge beam. The contact surface between the anchoring bar 6 and the fixed steel bar 7 is welded, and multiple anchoring bars 6 are arranged at equal intervals in the length direction of the fixed steel bar 7.

[0049] Step S2, install the prefabricated component assembly, align the anchor bolt through hole 9 set in the first accommodating groove 102 with the anti-loosening bolt 8 on the fixed steel bar 7, lower the first prefabricated component 1 and place it in the first expansion joint notch 10, so that the anchoring bar 6 and the fixed steel bar 7 in the first expansion joint notch 10 are embedded in the bottom groove of the first prefabricated component 1, align the anchor bolt through hole 9 set in the second accommodating groove 202 with the anti-loosening bolt 8 on the fixed steel bar 7, lower the second prefabricated component 2 and place it in the second expansion joint notch 11, so that the anchoring bar 6 and the fixed steel bar 7 in the second expansion joint notch 11 are embedded in the bottom groove of the second prefabricated component 2.

[0050] Step S3, installing the steel plate assembly, aligning the first special-shaped steel 301 of the first steel plate 3 with the first notch 101, the first comb-tooth structure 302 with the first receiving groove 102, and the anchor through hole 9 on the first comb-tooth structure 302 with the anti-loosening bolt 8, then installing the first steel plate 3 on the first prefabricated component 1, aligning the second special-shaped steel 401 of the second steel plate 4 with the second notch 201, the second comb-tooth structure 402 with the second receiving groove 202, and the anchor through hole 9 on the second comb-tooth structure 402 with the anti-loosening bolt 8, then installing the second steel plate 4 on the second prefabricated component 2, tightening the anti-loosening bolt 8 in the anchor through hole 9 on the first comb-tooth structure 302 and the second comb-tooth structure 402 with the bolt nut, grinding the top of the anti-loosening bolt 8 so that the top of the anti-loosening bolt 8 is not higher than the bridge deck 12, and pouring epoxy resin into the anchor through hole 9.

[0051] Step S4, pouring the water stop 5, the water stop 5 is poured with liquid rubber.

[0052] In an optional embodiment of the present application, pouring the water stop 5 includes installing a template between the first special-shaped steel 301 and the second special-shaped steel 401, the template is arranged at the bottom and side of the first special-shaped steel 301 and the second special-shaped steel 401, the template wraps the expansion joint between the first special-shaped steel 301 and the second special-shaped steel 401 to form an enclosing groove, and pouring liquid rubber into the enclosing groove until the liquid rubber fills the expansion joint between the first special-shaped steel 301 and the second special-shaped steel 401 and the open card slot 303, and the water stop 5 is formed after the liquid rubber is shaped. Among them, the template preferably uses a rectangular plastic plate or a thin wooden board with a thickness of about 5mm. After the liquid rubber is shaped, the templates on the sides of the first special-shaped steel 301 and the second special-shaped steel 401 are removed, while the templates at the bottom of the first special-shaped steel 301 and the second special-shaped steel 401 do not need to be disassembled. After being put into use, the template at the bottom will be broken due to pressure.

[0053] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. An assembled steel expansion device, characterized in that: The steel expansion device comprises: A prefabricated component assembly, comprising a first prefabricated component and a second prefabricated component, wherein the first prefabricated component is detachably arranged in a first expansion joint slot on a bridge beam body at one side of a bridge expansion joint, and the second prefabricated component is detachably arranged in a second expansion joint slot on a bridge beam body at the other side of the bridge expansion joint, a first slot is arranged on one side of a top of the first prefabricated component, a second slot is arranged on one side of a top of the second prefabricated component, the first slot and the second slot are arranged opposite to each other, and the first slot and the second slot are arranged on both sides of the bridge expansion joint; A steel plate assembly, comprising a first steel plate and a second steel plate, wherein the first steel plate is detachably embedded in the top of the first prefabricated component, and the second steel plate is detachably embedded in the top of the second prefabricated component, the first steel plate comprises a first special-shaped steel, and the second steel plate comprises a second special-shaped steel, the first special-shaped steel is arranged in the first notch, and the second special-shaped steel is arranged in the second notch, and a waterstop formed by cast-in-situ is arranged between the first special-shaped steel and the second special-shaped steel, and two sides of the waterstop are respectively embedded in the first special-shaped steel and the second special-shaped steel; A detachable reinforcement assembly is used to detachably connect the prefabricated component assembly and the steel plate assembly in the first expansion joint notch and the second expansion joint notch.

2. The assembled steel expansion device according to claim 1, characterized in that: The first steel plate includes a first comb-tooth structure, the first comb-tooth structure is integrally formed with the first special-shaped steel, the first comb-tooth structure is arranged on a side of the first special-shaped steel away from the second special-shaped steel, a first receiving groove for receiving the first comb-tooth structure is arranged on the first prefabricated component, and the first steel plate and the first prefabricated component form a first plane; The second steel plate includes a second comb-tooth structure, the second comb-tooth structure is integrally formed with the second special-shaped steel, the second comb-tooth structure is arranged on a side of the second special-shaped steel away from the first special-shaped steel, a second receiving groove for receiving the second comb-tooth structure is arranged on the second prefabricated component, and the second steel plate and the second prefabricated component form a second plane; The first plane and the second plane are flush with the bridge deck of the bridge beam.

3. The assembled steel expansion device according to claim 2, characterized in that: Removable reinforcement components are fixedly arranged on the bottom surface of the first expansion joint slot and the bottom surface of the second expansion joint slot, respectively, and the detachable reinforcement components include anchoring bars, fixing steel bars and anti-loosening bolts. Both ends of the anchoring bars are buried in the bridge beam and form a fastening ring with the bridge beam. The fixing steel bar is arranged on the bridge beam along the width direction of the bridge beam, and the fixing steel bar is fastened in the fastening ring. Anchor holes are arranged on the fixing steel bar, and one end of the anti-loosening bolt is fixed in the anchor hole. The anti-loosening bolt is detachably connected to the prefabricated component assembly and the steel plate assembly.

4. The assembled steel expansion device according to claim 3, characterized in that: Anchor bolt through holes are correspondingly arranged on the first comb-tooth structure and in the first accommodating groove, anchor bolt through holes are correspondingly arranged on the second comb-tooth structure and in the second accommodating groove, bolt caps are arranged in the anchor bolt through holes of the first comb-tooth structure and the second comb-tooth structure, and the anti-loosening bolt is tightened with the bolt cap after passing through the anchor bolt through holes.

5. The assembled steel expansion device according to claim 3, characterized in that: The first prefabricated component and the second prefabricated component are provided with bottom slots, and the bottom slots are used to embed the anchoring reinforcement and the fixing steel bar.

6. The assembled steel expansion device according to claim 1, characterized in that: The first prefabricated component and the second prefabricated component are both ultra-high performance concrete components.

7. The assembled steel expansion device according to claim 1, characterized in that: The waterstop is made of liquid rubber, and the thickness of the waterstop is the same as the thickness of the first special-shaped steel and the second special-shaped steel.

8. The assembled steel expansion device according to claim 1, characterized in that: The first special-shaped steel and the second special-shaped steel are both provided with an open slot, and the open slot is used for connecting the water stop belt.

9. A method for installing an assembled steel expansion device, characterized in that: The assembled steel expansion device for installing any one of claims 1 to 8 comprises: Install the detachable reinforcement assembly, place the fixed steel bar with the anti-loosening bolts placed in advance on the bottom surface of the first expansion joint notch and the bottom surface of the second expansion joint notch, cover the fixed steel bar with anchoring bars, and embed the two ends of the anchoring bars in the bridge beam. The fastening ring formed between the anchoring bars and the bridge beam fastens the fixed steel bar to the bridge beam, and the contact surface between the anchoring bars and the fixed steel bar is welded; Install the prefabricated component assembly, align the anchor bolt through hole provided in the first receiving groove with the anti-loosening bolt on the fixed steel bar, lower the first prefabricated component and place it in the first expansion joint notch, so that the anchoring bar and the fixed steel bar in the first expansion joint notch are embedded in the bottom slot of the first prefabricated component, align the anchor bolt through hole provided in the second receiving groove with the anti-loosening bolt on the fixed steel bar, lower the second prefabricated component and place it in the second expansion joint notch, so that the anchoring bar and the fixed steel bar in the second expansion joint notch are embedded in the bottom slot of the second prefabricated component; Install the steel plate assembly, align the first special-shaped steel of the first steel plate with the first notch, the first comb-tooth structure with the first receiving groove, and the anchor bolt through hole on the first comb-tooth structure with the anti-loosening bolt, then install the first steel plate on the first prefabricated component, align the second special-shaped steel of the second steel plate with the second notch, the second comb-tooth structure with the second receiving groove, and the anchor bolt through hole on the second comb-tooth structure with the anti-loosening bolt, then install the second steel plate on the second prefabricated component, tighten the anti-loosening bolts in the anchor bolt through holes on the first comb-tooth structure and the second comb-tooth structure with bolt nuts, set the end of the anti-loosening bolt below the top surface of the steel plate assembly, and pour epoxy resin into the anchor bolt through hole; Casting water stop, the water stop is cast with liquid rubber.

10. The method for installing a prefabricated steel expansion device according to claim 9, characterized in that: The casting waterstop includes installing a template between the first special-shaped steel and the second special-shaped steel, the template is set at the bottom and side of the first special-shaped steel and the second special-shaped steel, the template wraps the expansion joint between the first special-shaped steel and the second special-shaped steel to form an enclosing groove, and liquid rubber is poured into the enclosing groove until the liquid rubber fills the expansion joint and the open slot between the first special-shaped steel and the second special-shaped steel.

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