Locally replaceable modular single-slit expansion device

Abstract

The present invention discloses a modular single-slit telescopic device that can be locally replaced, which is formed by arranging a number of standardized components in the length direction of the expansion joint. The standardized components include two side beams and a water stop belt. The two side beams are respectively fixedly arranged on two anchor plates, and the two anchor plates are respectively placed on two precast blocks. The two precast blocks are respectively arranged in the L-shaped notch at the end of two precast T-beams. A transverse joint is formed between the precast block and the vertical part of the L-shaped notch. An embedded sleeve with a threaded hole facing upward is embedded in the precast block. The anchor plate is provided with a hole, and the anchor plate and the precast block are connected by a bolt passing through the hole and threadedly screwing into the embedded sleeve. The transverse joint is provided with joint steel bars that can connect the precast T-beam and the precast block into an integral body. A steel mesh is horizontally laid between the middle part of the side beam facing the vertical part of the L-shaped notch and the vertical part of the L-shaped notch. A concrete body is poured in the L-shaped notch between the side beam and the precast T-beam; when the device is damaged, only the damaged part needs to be replaced, and the replacement can be realized without traffic interruption.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge structure expansion joints, and particularly relates to a modular single-joint expansion device that can be partially replaced. Background Art

[0002] Survey data from domestic urban construction management departments on multiple occasions shows that the intact rate of bridge expansion joints only accounts for 25% - 50% of the total number of bridges. Research on the current usage status of highway expansion devices shows that for expansion devices with a span of 160 and below, the vast majority are steel section expansion joints, mainly single-joint expansion joints. The damage of expansion devices is also very common, and most of the damage to expansion devices is local damage. However, when replacing, the entire single-joint steel section expansion device still needs to be replaced as a whole. In addition, the local damage of the concrete in the anchorage area of the expansion joint is particularly prominent. If only the damaged concrete in the local area is treated, the damaged concrete at the notch is chiseled out and re-poured, and it is necessary to implant steel bars in the beam body. There is no steel bar connection between the newly poured concrete and the original concrete, which is extremely easy to crack and damage again, and the treatment effect is not ideal. If the concrete at the expansion joint notch is chiseled out and replaced as a whole, the replacement takes a long time, and a single lane of the highway needs to be closed, and continuous traffic replacement cannot be achieved, bringing great pressure to traffic. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a modular single-joint expansion device that can be partially replaced. When damaged, only the damaged part needs to be replaced, continuous traffic replacement can be achieved, the replacement is simple and time-consuming, and good replacement treatment effects can be obtained.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A modular single-joint expansion device that can be partially replaced is formed by arranging a number of standardized components in the length direction of the expansion joint. The standardized components include two side beams and a waterstop. The two side beams are respectively fixedly arranged on two anchorage steel plates. The two anchorage steel plates are respectively placed on two precast blocks. The two precast blocks are respectively arranged in the L-shaped notches at the ends of two precast T-beams. A transverse joint is formed between the precast block and the vertical part of the L-shaped notch. The precast block is embedded with a threaded sleeve with a threaded hole facing upwards. The anchorage steel plate is provided with a hole. The anchorage steel plate and the precast block are connected by a bolt passing through the hole and being screwed into the threaded sleeve. The transverse joint is provided with joint steel bars that can connect the precast T-beam and the precast block into one body. A steel mesh is horizontally laid between the middle part of the side beam facing the vertical part of the L-shaped notch and the vertical part of the L-shaped notch. A concrete body is poured in the L-shaped notch between the side beam and the precast T-beam.

[0006] Furthermore, the anchoring steel plate is in an inverted L shape in cross section. An L-shaped notch is provided on the side of the precast block away from the transverse joint. The vertical part of the inverted L-shaped anchoring steel plate is located in the L-shaped notch, and the horizontal part overlaps on the top of the precast block. The holes are arranged on the horizontal part of the inverted L-shaped anchoring steel plate.

[0007] Furthermore, the joint steel bars include precast T-beam connecting steel bars, precast block connecting steel bars and longitudinally penetrating joint steel bars. The precast T-beam connecting steel bars are arranged on the horizontal part of the L-shaped notch and are annular. There are several precast T-beam connecting steel bars arranged along the width direction of the precast T-beam. The precast block connecting steel bars are arranged on the side of the precast block facing the transverse joint and are annular. There are several precast block connecting steel bars arranged along the length direction of the precast block. The precast T-beam connecting steel bars and the precast block connecting steel bars partially overlap, and the longitudinally penetrating joint steel bars are fixedly arranged inside the overlapping part of the precast T-beam connecting steel bars and the precast block connecting steel bars.

[0008] Furthermore, the joint steel bars include precast T-beam connecting steel bars, precast block connecting steel bars, circular stirrups and longitudinally penetrating joint steel bars. The precast T-beam connecting steel bars are arranged on the vertical part of the L-shaped notch and are annular. There are several precast T-beam connecting steel bars arranged along the width direction of the precast T-beam. The precast block connecting steel bars are arranged on the side of the precast block facing the transverse joint and are annular. There are several precast block connecting steel bars arranged along the length direction of the precast block. There are several circular stirrups. The opposite sides of each circular stirrup overlap and are connected as a whole with the precast T-beam connecting steel bars and the precast block connecting steel bars respectively. The longitudinally penetrating joint steel bars are fixedly arranged inside the overlapping part of the circular stirrups with the precast T-beam connecting steel bars and the precast block connecting steel bars.

[0009] Furthermore, the side beam is in an F shape in the longitudinal section.

[0010] Furthermore, both the precast T-beam connecting steel bars and the precast block connecting steel bars are long strip-shaped rings, and one end of each of them is embedded in the precast T-beam connecting steel bars or the precast block connecting steel bars.

[0011] The beneficial effects of the present invention are as follows:

[0012] The locally replaceable modular single-seam expansion device of the present invention has the following beneficial effects:

[0013] First, the device replacement is very convenient. That is, for local damage, only the standardized components at the damaged part need to be replaced, and the other parts of the expansion device are not affected. At the same time, it can be replaced without interrupting traffic, and only a single lane needs to be occupied for construction. Secondly, during the construction and installation of the single-slit expansion device, the use of a modular expansion device greatly reduces the weight, and it can be installed without the aid of a lifting device, easily realizing the adjustment of the position of the expansion device. Thirdly, for the modular single-slit expansion device, since the bottom of the side beam is fixed to the anchor plate, and the anchor plate is connected to the precast block by bolts, the connection is fast and the construction is convenient. The precast block is connected to the precast T-beam as a whole through the joint steel bars, and the connection is reliable.

[0014] Other advantages, objectives, and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following specification and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the drawings, where:

[0016] Figure 1 is a sectional view of the present invention.

[0017] Figure 2 is Figure 1 the front view of the left half part in

[0018] Figure 3 is Figure 1 the top view of the left half part in

[0019] Figure 4 is Figure 1 another sectional view of the joint steel bars of the left half part in DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] The following will refer to the drawings to describe the preferred embodiments of the present invention in detail. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the protection scope of the present invention.

[0021] As Figures 1-4As shown, a partially replaceable modular single-slit expansion joint device is formed by arranging a number of standardized components in the length direction of the expansion joint. The gap between two adjacent standardized components is very small, which is only a thin gap. The length of each standardized component is equal to the width of a lane. The standardized components include two side beams 1 and a water stop. The arrangement of the two side beams and the connection between the side beams and the water stop are both prior art. The two side beams 1 are respectively fixed on two anchor steel plates 2, and the two anchor steel plates 2 are respectively placed on two prefabricated blocks 3. The side beams, anchor steel plates, and prefabricated blocks are of the same length. The two prefabricated blocks 3 are respectively arranged on the two prefabricated T In the L-shaped groove at the end of the beam 4, a transverse joint 5 is formed between the prefabricated block 3 and the vertical part of the L-shaped groove. A prefabricated sleeve 6 with a threaded hole opening upward is embedded in the prefabricated block 3. A hole is provided on the anchor steel plate 2. The anchor steel plate 2 and the prefabricated block 3 are connected by bolts 7 passing through the hole and screwed into the embedded sleeve 6. The connection is convenient. A joint steel bar that can connect the prefabricated T-beam 4 and the prefabricated block 3 as a whole is provided in the transverse joint 5. A steel mesh 8 is horizontally laid between the middle part of the side beam 1 facing the vertical part of the L-shaped groove and the vertical part of the L-shaped groove. A concrete body 9 is poured in the L-shaped groove between the side beam 1 and the prefabricated T-beam 4.

[0022] The device is very easy to replace, that is, in case of local damage, only the standardized components of the damaged part need to be replaced, and the other parts of the telescopic device will not be affected. At the same time, it can be replaced continuously, and only a single lane needs to be occupied for construction. Secondly, when constructing and installing a single-seam telescopic device, the weight is greatly reduced by using a modular telescopic device, and it can be installed without the help of a lifting device, and the position of the telescopic device can be easily adjusted. Thirdly, the modular single-seam telescopic device fixes the bottom of the side beam to the anchor steel plate, and the anchor steel plate is connected to the prefabricated block by bolts. The connection is fast and the construction is convenient. The prefabricated block is connected to the prefabricated T-beam as a whole through the joint steel bar, and the connection is reliable.

[0023] Preferably, the anchoring steel plate 2 is an inverted L-shape in cross section, and an L-shaped notch is provided on the side of the prefabricated block 3 facing away from the transverse seam 5. The vertical portion of the inverted L-shaped anchoring steel plate 2 is located in the L-shaped notch, and the horizontal portion overlaps the top of the prefabricated block. The hole is provided on the horizontal portion of the inverted L-shaped anchoring steel plate 2, and the corners of the anchoring steel plate can protect the prefabricated block.

[0024] The joint steel bars include precast T-beam connecting steel bars 9, precast block connecting steel bars 10 and joint longitudinal through-steel bars 11. The precast T-beam connecting steel bars 9 are arranged on the horizontal part of the L-shaped groove and are in a ring shape. There are several precast T-beam connecting steel bars 9 and they are arranged along the width direction of the precast T-beam 4. The precast block connecting steel bars 10 are arranged on the side of the precast block 3 facing the transverse joint 5 and are in a ring shape. There are several precast block connecting steel bars 10 and they are arranged along the length direction of the precast block 3. The precast T-beam connecting steel bars 9 partially overlap with the precast block connecting steel bars 10. The joint longitudinal through-steel bars 11 are fixedly passed through the overlapping part of the precast T-beam connecting steel bars 9 and the precast block connecting steel bars 10.

[0025] The joint reinforcement bars include precast T-beam connecting reinforcement bars, precast block connecting reinforcement bars, circular stirrups 12 and joint longitudinal through reinforcement bars. The precast T-beam connecting reinforcement bars are arranged on the vertical part of the L-shaped notch and are circular. There are several precast T-beam connecting reinforcement bars, which are arranged along the width direction of the precast T-beam 4. The precast block connecting reinforcement bars are arranged on the side of the precast block facing the transverse joint and are circular. There are several precast block connecting reinforcement bars, which are arranged along the length direction of the precast block. There are several circular stirrups 12. The two opposite sides of the circular stirrups 12 respectively overlap and are connected as a whole with the precast T-beam connecting reinforcement bars and the precast block connecting reinforcement bars. The joint longitudinal through reinforcement bars are fixedly arranged inside the overlapping parts of the circular stirrups with the precast T-beam connecting reinforcement bars and the precast block connecting reinforcement bars.

[0026] The side beam 1 is F-shaped in the longitudinal section.

[0027] Both the precast T-beam connecting reinforcement bar 9 and the precast block connecting reinforcement bar 10 are long strip-shaped and circular, and one end of each of them is embedded in the precast T-beam connecting reinforcement bar 9 or the precast block connecting reinforcement bar 10.

[0028] In this device, a notch is provided on the precast T-beam 4, and precast block connecting reinforcement bars 10 and embedded sleeves 6 are provided on the precast block 3. After the precast T-beam 4 is erected, the precast block 3 is installed at the notch. At the transverse joint 5, the precast block 3 and the precast T-beam 4 are connected as a whole through the precast block connecting reinforcement bars 10, the precast T-beam connecting reinforcement bars 6, and the joint longitudinal through reinforcement bars 11. The anchor steel plate 2 on the side beam 1 and the precast block 3 are connected by bolts 7 passing through holes and being screwed into the embedded sleeves 6 in a threaded manner. At the same time, when pouring concrete, no additional formwork needs to be set up. The gap between the precast T-beam 4, the side beam 1, and the precast block 3 is directly used as the transverse joint 5, which is convenient for pouring the concrete body 9. When the concrete in the expansion device or the anchor area of the expansion joint is locally damaged, only the corresponding concrete body needs to be chiseled, and the bolts 7 are unscrewed from the embedded sleeves 6 to take out the side beam 1 for replacement, or continue to take out the connecting reinforcement bars at the joint, take out the corresponding precast block 3 for replacement, then reinstall the connecting reinforcement bars at the joint, connect the side beam 1 to the precast block 3 and then lay the steel mesh 8 and pour the concrete body 9 to complete the replacement of the side beam 1 or the precast block 3.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A modular single-slit expansion device that can be locally replaced, characterized in that: The invention is formed by arranging a plurality of standardized components in the length direction of the expansion joint, wherein the length of each standardized component is equal to the width of a lane, wherein the standardized components include two side beams (1) and a water stop strip, wherein the two side beams (1) are respectively fixedly arranged on two anchoring steel plates (2), wherein the two anchoring steel plates (2) are respectively placed on two prefabricated blocks (3), wherein the side beams, the anchoring steel plates and the prefabricated blocks are of the same length, wherein the two prefabricated blocks (3) are respectively placed in L-shaped notches at the ends of two prefabricated T-beams (4), wherein a transverse joint (5) is formed between the prefabricated blocks (3) and the vertical portions of the L-shaped notches, and wherein the prefabricated blocks (3) are provided with a plurality of standard components. An embedded sleeve (6) with a threaded hole opening upward is pre-embedded, a hole is provided on the anchoring steel plate (2), the anchoring steel plate (2) and the prefabricated block (3) are connected by bolts (7) passing through the hole and screwed into the embedded sleeve (6), the transverse joint (5) is provided with joint steel bars for connecting the prefabricated T beam (4) and the prefabricated block (3) as a whole, a steel mesh (8) is horizontally laid between the middle part of the side beam (1) facing the vertical part of the L-shaped notch and the vertical part of the L-shaped notch, and a concrete body (14) is poured in the L-shaped notch between the side beam (1) and the prefabricated T beam (4); The anchoring steel plate (2) is in an inverted L-shape in cross section, and the prefabricated block (3) is provided with an L-shaped notch on the side facing away from the transverse joint (5). The vertical portion of the inverted L-shaped anchoring steel plate (2) is located in the L-shaped notch, and the horizontal portion overlaps the top of the prefabricated block, and the hole is provided on the horizontal portion of the inverted L-shaped anchoring steel plate (2).

2. The locally replaceable modular single-slit telescopic device according to claim 1, wherein: The joint steel bars include prefabricated T-beam connecting steel bars (9), prefabricated block connecting steel bars (10) and joint longitudinal through-steel bars (11); the prefabricated T-beam connecting steel bars (9) are arranged on the horizontal part of the L-shaped notch and are in an annular shape; the prefabricated T-beam connecting steel bars (9) are in a plurality and are arranged along the width direction of the prefabricated T-beam (4); the prefabricated block connecting steel bars (10) are in an annular shape and are arranged on the side of the prefabricated block (3) facing the transverse joint (5); the prefabricated block connecting steel bars (10) are in a plurality and are arranged along the length direction of the prefabricated block (3); the prefabricated T-beam connecting steel bars (9) and the prefabricated block connecting steel bars (10) partially overlap; and the joint longitudinal through-steel bars (11) are fixedly inserted into the overlapping part of the prefabricated T-beam connecting steel bars (9) and the prefabricated block connecting steel bars (10).

3. The locally replaceable modular single-slit telescopic device according to claim 1, characterized in that: The joint reinforcement comprises precast T-beam connecting reinforcement, precast block connecting reinforcement, annular stirrups (12) and joint longitudinal through reinforcement. The precast T-beam connecting reinforcement is arranged on the vertical portion of the L-shaped notch and is annular. The precast T-beam connecting reinforcement is in the form of a plurality of steel bars and is arranged along the width direction of the precast T-beam (4). The precast block connecting reinforcement is in the form of annular and is arranged on the side of the precast block facing the transverse joint. The precast block connecting reinforcement is in the form of a plurality of steel bars and is arranged along the length direction of the precast block. The annular stirrups (12) are in the form of a plurality of steel bars. The opposite sides of the annular stirrups (12) overlap with the precast T-beam connecting reinforcement and the precast block connecting reinforcement and are connected as one body. The joint longitudinal through reinforcement is fixedly penetrated inside the overlapping portion of the annular stirrups, the precast T-beam connecting reinforcement and the precast block connecting reinforcement.

4. The locally replaceable modular single-slit telescopic device according to any one of claims 1-3, characterized in that: The side beam (1) is F-shaped in the longitudinal cross section.

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