A protective platform and method for steel-concrete composite beam bridge deck construction

Abstract

The present invention discloses a protective platform and method for the construction of a steel-concrete composite beam bridge deck, which relates to the technical field of bridge construction. The protective platform includes a platform panel, a hole is provided in the middle, and a turning platform is hinged in the hole; two platform longitudinal beams are relatively arranged on both sides below the platform panel; two platform cross beams, both ends of which are respectively connected to the ends of the two platform longitudinal beams; two reinforcing cross beams are respectively arranged on both sides below the opening, and the distance between the platform cross beam away from the forward direction of the protective platform and the corresponding reinforcing cross beam is greater than the spacing between adjacent bridge cross beams, and less than the longitudinal length of a single bridge deck in the bridge direction; two support adjustment mechanisms, each support adjustment mechanism is arranged at the end of a platform longitudinal beam away from the forward direction; four running devices, and every two running devices are arranged at intervals below a platform longitudinal beam. The protective platform of the present invention effectively reduces safety risks, improves construction efficiency, and saves construction period.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a protective platform and method for the construction of a steel-concrete combined beam bridge deck. Background Art

[0002] The installation and construction of steel-concrete composite beam bridge deck is an aerial operation, which is mainly carried out by crane lifting and manual assistance. The above method is often used in the construction of steel-concrete composite beam bridge decks in China, but when installing the bridge deck, workers need to stand on the steel longitudinal beams and cross beams facing the sky on all sides, and there is no reliable safety rope hanging position on the top of the steel beam, which has a high risk factor and a high construction risk. At the same time, due to the limited construction space, the construction efficiency of workers is relatively low.

[0003] Since the steel beams of the bridge are a beam grid system, the existing bridge deck construction is mostly carried out by splicing and setting up platforms on site. However, although on-site splicing construction is simple, it is only suitable for small-space systems. When there is a large space between the crossbeam and the small longitudinal beam, and the overpass railway is an operating line, the strength of the on-site platform is difficult to meet the requirements, which poses a great threat to the personal safety of workers and the auxiliary structures under the bridge. It is difficult to protect the equipment and facilities within the railway range, and the construction speed is slow. Summary of the invention

[0004] In view of the defects existing in the prior art, the purpose of the present invention is to provide a protection platform and method for the construction of steel-concrete composite beam bridge deck, so as to effectively reduce safety risks and improve construction efficiency.

[0005] A first aspect of the present invention provides a protective platform for the construction of a steel-concrete composite beam bridge deck, wherein the steel-concrete composite beam comprises two steel longitudinal beams, a plurality of small longitudinal beams arranged in parallel between the two steel longitudinal beams, and a plurality of bridge cross beams perpendicular to the steel longitudinal beams, wherein the protective platform is erected between the steel longitudinal beam and the small longitudinal beam arranged opposite to the steel longitudinal beam, or between adjacent small longitudinal beams, and comprises:

[0006] A platform panel, the center of which is provided with an opening, and a turning platform is hinged in the opening;

[0007] Two platform longitudinal beams, which are arranged oppositely on both sides below the platform panel;

[0008] Two platform cross beams, each of which has two ends connected to the ends of the two platform longitudinal beams;

[0009] Two reinforcing cross beams are respectively arranged on both sides below the opening, and both ends of each reinforcing cross beam are respectively connected to two platform longitudinal beams, and the distance between the platform cross beam away from the advancing direction of the protection platform and the reinforcing cross beam opposite thereto is greater than the spacing between adjacent bridge cross beams and less than the longitudinal length of a single bridge deck in the bridge direction;

[0010] Two support adjustment mechanisms, each support adjustment mechanism is arranged at an end of a platform longitudinal beam away from the forward direction;

[0011] There are four running devices, with every two running devices being arranged at intervals under a platform longitudinal beam.

[0012] Based on the first aspect, in a possible embodiment, a distance between a platform crossbeam close to the advancing direction and its opposite reinforcing crossbeam is greater than a distance between another platform crossbeam and its opposite reinforcing crossbeam.

[0013] Based on the first aspect, in a possible embodiment, the running device includes:

[0014] The wheel box comprises two side plates arranged opposite to each other, an end plate connecting the two side plates, and a top plate located above the side plates and the end plates, wherein the top plate is fixedly connected to the side plates and the end plates respectively;

[0015] A pin shaft, both ends of which are fixed to the two side plates respectively;

[0016] A steel wheel is mounted on the pin shaft through a bearing sleeve, and a wear-resistant rubber layer is provided on the surface of the steel wheel;

[0017] At least two rows of shear nails are arranged on the steel longitudinal beam, and at least four rows of shear nails are arranged on the small longitudinal beam. The track of the steel wheel is formed between two adjacent rows of shear nails, and the lower end surface of the side plate is lower than the upper end surface of the shear nails.

[0018] Based on the first aspect, in a possible embodiment, both ends of the wheel box are fixedly connected to the platform longitudinal beam through a connecting arm, and the other side of the connection between the platform longitudinal beam and the connecting arm is fixedly connected to the platform cross beam or the reinforcing cross beam through a wheel box diagonal brace;

[0019] The side plates of the two wheel boxes located on one side of the longitudinal bridge are connected by a guide plate.

[0020] Based on the first aspect, in a possible embodiment, the running device further includes two traction devices, each traction device is fixed to a platform longitudinal beam, one end of the traction device is connected to a fixing member via a steel wire rope, and the other end thereof is connected to a traction member via a steel wire rope, the fixing member is fixed to the platform cross beam, and the traction member is fixed to the steel longitudinal beam where the platform longitudinal beam is located or the platform longitudinal beam of an adjacent protective platform.

[0021] Based on the first aspect, in a possible embodiment, the support adjustment mechanism includes an adjustment sleeve and an adjustment bolt passing through the adjustment sleeve, the adjustment sleeve is fixed to the platform longitudinal beam, and an inner wall of the adjustment sleeve is formed with an internal thread matching the adjustment bolt.

[0022] Based on the first aspect, in a possible embodiment, a plurality of longitudinal ribs are arranged between the two platform longitudinal beams, and two ends of the longitudinal ribs are respectively fixed to the upper surfaces of the two platform cross beams;

[0023] A plurality of transverse ribs are arranged between the two platform cross beams, and the two ends of the transverse ribs are respectively fixed to the upper surfaces of the two platform longitudinal beams;

[0024] The above platform panels are respectively welded and fixed to the longitudinal ribs and transverse ribs;

[0025] A reinforcing longitudinal beam is also provided in the middle of the two platform longitudinal beams, and the two ends of the reinforcing longitudinal beam are respectively fixed to the two platform cross beams;

[0026] Each platform cross beam is located at the two sides of the above-mentioned reinforcing longitudinal beam, and is provided with two mutually intersecting oblique ribs between the opposite reinforcing cross beams.

[0027] A second aspect of the present invention provides a method for constructing a steel-concrete composite beam bridge deck using the above-mentioned protection platform, which comprises the following steps:

[0028] Protective platforms are set up between the steel longitudinal beams and the small longitudinal beams, and between adjacent small longitudinal beams; the area between a platform crossbeam away from the advancing direction of one of the protective platforms and the reinforcing crossbeam arranged opposite to the platform crossbeam is the installation area of ​​the bridge deck to be installed;

[0029] Open the above-mentioned turning table, and install rubber strips on the top surface of the steel longitudinal beam, the top surface of the small longitudinal beam, and the top surface of the bridge cross beam corresponding to the bridge deck to be installed;

[0030] The bridge deck to be installed is hoisted above the above-mentioned installation area, and the protective platform is driven by the traveling device to move along the longitudinal direction of the bridge to the position of the adjacent bridge deck to be installed;

[0031] Adjust the relative positions of the bridge deck to be installed and the rubber strip, and install and fix them;

[0032] Using the currently installed bridge deck as partial protection, continue installing other bridge decks until all bridge decks are installed.

[0033] Based on the second aspect, in a possible embodiment, when the bridge deck to be installed is installed, protective components are provided on all four sides thereof, and the protective components are protective platforms, installed bridge decks or steel longitudinal beams.

[0034] Based on the second aspect, in a possible embodiment, when installing the rubber strip, the support adjustment mechanism is adjusted to be supported on the steel longitudinal beam or small longitudinal beam on which it is located.

[0035] Compared with the prior art, the advantages of the present invention are:

[0036] (1) The protective platform of the present invention has an opening in the middle of the platform panel and a turning platform that can be opened and closed at any time is hinged in the opening, so that construction workers can install rubber strips on the top surface of the bridge beam at the corresponding position, effectively reducing safety risks, improving construction efficiency, and saving construction time.

[0037] (2) The protective platform of the present invention uses shear nails as the lateral limit of the steel wheel track, ensuring that the steel wheel is always located between two adjacent rows of shear nails and moves along the longitudinal bridge direction; the lower end surface of the side plate of the wheel box is lower than the upper end surface of the shear nails, effectively separating the steel wheel from the shear nails, avoiding scratches and damage between the two, and preventing the steel wheel from being stuck in the gap between the shear nails.

[0038] (3) The protective platform of the present invention is provided with a support adjustment mechanism at the end of the platform longitudinal beam away from the forward direction, so that the support adjustment mechanism can be adjusted at any time to support the steel longitudinal beam or small longitudinal beam on which it is located to form a fulcrum of the platform panel.

[0039] (4) When the bridge deck to be installed is installed, protective components are provided on all sides of the bridge deck to be installed. The protective components are protective platforms, installed bridge decks or steel longitudinal beams, so that there is no free surface during the bridge deck construction process, which further reduces the safety risk. There is no need to hang a safety rope, thereby freeing up operating space and speeding up the construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of the structure of a protection platform in an embodiment of the present invention;

[0041] Figure 2 for Figure 1 AA section view in the figure;

[0042] Figure 3 for Figure 2 A magnified view of middle;

[0043] Figure 4 for Figure 1 BB section diagram in the figure;

[0044] Figure 5 This is a schematic diagram of the installation of the running device in an embodiment of the present invention;

[0045] Figure 6 It is a schematic diagram of the structure of the running device in an embodiment of the present invention;

[0046] Figure 7 for Figure 6 CC cross-sectional view in (connecting arm not shown);

[0047] Figure 8 for Figure 6 DD section diagram in;

[0048] Fig. 9 It is a schematic diagram of the structure of a steel wheel in an embodiment of the present invention;

[0049] Fig.10 This is a schematic diagram of the installation of a tractor in an embodiment of the present invention;

[0050] Fig.11 This is a schematic diagram of the installation of a protection platform in an embodiment of the present invention;

[0051] Fig.12 It is a structural schematic diagram of a support adjustment mechanism in an embodiment of the present invention;

[0052] Fig.13 A schematic diagram of a supporting state of a supporting adjustment mechanism in an embodiment of the present invention;

[0053] Fig.14 This is a schematic diagram of construction steps S1 to S2 in an embodiment of the present invention;

[0054] Fig.15 This is a schematic diagram of construction step S3 in an embodiment of the present invention;

[0055] Fig.16 Schematic diagram of construction step S4 in an embodiment of the present invention.

[0056] Reference numerals:

[0057] 1- platform panel, 11- turning table;

[0058] 2-platform longitudinal beam, 20-reinforced longitudinal beam, 21-longitudinal rib, 22-railing;

[0059] 3- platform beam, 30- reinforcing beam, 31- transverse rib;

[0060] 4-support adjustment mechanism, 41-adjustment sleeve, 42-adjustment bolt;

[0061] 5-running device, 51-wheel box, 511-side plate, 512-end plate, 513-top plate, 514-connecting arm, 515-wheel diagonal support, 52-pin shaft, 53-steel wheel, 531-bearing, 532-wear-resistant rubber layer, 54-guide plate, 55-tractor, 56-fixing part, 57-traction part;

[0062] 6-Steel longitudinal beam; 7-Small longitudinal beam; 8-Bridge cross beam; 9-Rubber strip. DETAILED DESCRIPTION

[0063] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0064] See also Figure 1-4As shown, the embodiment of the present invention provides a protective platform for the construction of steel-concrete composite beam bridge deck, which is suitable for the construction of bridge decks at high altitude and beam grid system. The steel-concrete composite beam is a hollow structure, which includes two steel longitudinal beams 6, a plurality of small longitudinal beams 7 located between the two steel longitudinal beams 6, and a plurality of bridge cross beams 8 perpendicular to the steel longitudinal beams 6. The plurality of small longitudinal beams 7 are parallel to each other and evenly spaced, and the plurality of bridge cross beams 8 are parallel to each other and evenly spaced.

[0065] The above-mentioned protection platform is erected between the steel longitudinal beam 6 and the small longitudinal beam 7 arranged opposite to the steel longitudinal beam 6, or between adjacent small longitudinal beams 7. The forward direction of the protection platform is the construction direction of the bridge deck along the longitudinal direction of the bridge. The protection platform includes a platform panel 1, two platform longitudinal beams 2, two platform cross beams 3, two support adjustment mechanisms 4 and four running devices 5.

[0066] The platform panel 1 is provided with an opening in the middle, and a turning platform 11 which can be opened and closed at any time is hinged in the opening. The opening can be rectangular, and the turning platform 11 can be set as an integral large turning platform, or a plurality of small turning platforms arranged in parallel.

[0067] Two platform longitudinal beams 2 are arranged oppositely on both sides below the platform panel 1. The two platform longitudinal beams 2 are parallel to each other and arranged along the longitudinal bridge direction. Both ends of each platform cross beam 3 are respectively connected to the ends of the two platform longitudinal beams 2, and are used to connect the two platform longitudinal beams 2. The two platform cross beams 3 are parallel to each other and arranged along the transverse bridge direction.

[0068] In this embodiment, the platform longitudinal beam 2 and the platform cross beam 3 can both be selected as I-beams, and the ends of the webs of the platform longitudinal beam 2 are provided with stiffening plates, and the ends of the platform cross beam 3 are welded and fixed to the stiffening plates of the webs of the platform longitudinal beam 2 .

[0069] Two reinforcing beams 30 are respectively arranged on both sides below the above-mentioned opening, and the two ends of each reinforcing beam 30 are respectively fixedly connected to the two platform longitudinal beams 2. The distance between the platform beam 3 away from the advancing direction of the above-mentioned protection platform and the reinforcing beam 30 opposite to it is greater than the spacing between adjacent bridge beams 8, and less than the longitudinal length of a single bridge deck. When the platform panel 1 is located at the bridge deck to be installed, the turning platform 11 and the bridge beam below it can be in the same vertical plane.

[0070] Each support adjustment mechanism 4 is arranged at the end of a platform longitudinal beam 2 away from the forward direction. By arranging the support adjustment mechanism 4 at the end of the platform longitudinal beam 2 away from the forward direction, the support of the support adjustment mechanism 4 on the steel longitudinal beam 6 or small longitudinal beam 7 where it is located can be adjusted at any time to form a fulcrum of the platform panel 1.

[0071] Every two running devices 5 are arranged at intervals below a platform longitudinal beam 2, one of the running devices 5 is located at the end of the platform longitudinal beam 2 close to the forward direction, and the other running device 5 is located on the platform longitudinal beam 2 at the opening.

[0072] The protective platform of this embodiment can prevent objects from falling during construction, so as to protect the personnel and existing structures below it. By opening an opening in the middle of the platform panel 1 and hingedly connecting a turning platform 11 that can be opened and closed at any time in the opening, it is convenient for construction workers to install the rubber strip on the top surface of the bridge beam 8 at the corresponding position. After opening the turning platform 11, the construction workers can directly stand on the platform panel 1 to install the rubber strip on the top surface of the bridge beam 8 below the turning platform 11, which effectively reduces safety risks, improves construction efficiency, and saves construction time.

[0073] In this embodiment, the distance between the platform beam 3 close to the advancing direction and the opposite reinforcing beam 30 is greater than the distance between the other platform beam 3 and the opposite reinforcing beam 30. Preferably, the distance between the platform beam 3 close to the advancing direction and the opposite reinforcing beam 30 is 1.5 times the distance between the other platform beam 3 and the opposite reinforcing beam 30.

[0074] See also Figure 5-8 As shown, in this embodiment, the running device 5 includes a wheel box 51, a pin shaft 52 and a steel wheel 53.

[0075] The wheel box 51 includes two side plates 511, two end plates 512 and a top plate 513. The two side plates 511 are arranged in parallel and opposite to each other, and the two end plates 512 are arranged in parallel and opposite to each other. The two side plates 511 and the two end plates 512 intersect each other to form a rectangular frame. The top plate 513 is located above the side plates 511 and the end plates 512, and the top plate 513 is fixedly connected to the side plates 511 and the end plates 512, respectively.

[0076] The two ends of the pin shaft 52 are respectively fixed on the two side plates 511, and the pin shaft 52 is vertically arranged with the side plates 511. The steel wheel 53 is embedded with a bearing 531, and is sleeved on the pin shaft 52 through the bearing 531.

[0077] See also Fig. 9 As shown, the surface of the steel wheel 53 is provided with a wear-resistant rubber layer 532. The steel wheel 53 is a steel wheel, which has high controllability and flexibility, and can save the time spent on platform movement.

[0078] Optionally, since one protective platform is generally provided on the steel longitudinal beam 6, and two protective platforms are generally provided on the small longitudinal beam 7, at least two rows of shear nails are provided on the steel longitudinal beam 6, and at least four rows of shear nails are provided on the small longitudinal beam 7, and the track of the steel wheel 53 is formed between two adjacent rows of shear nails. At the same time, the shear nails can also serve as lateral limiters of the steel wheel track, ensuring that the steel wheel 53 is always located between two adjacent rows of shear nails and moves along the longitudinal bridge direction. In addition, the lower end surface of the wheel box side plate 511 is lower than the upper end surface of the shear nails, which can effectively separate the steel wheel 53 from the shear nails, avoiding scratches and damage between the two, and the situation where the steel wheel 53 is stuck in the gap of the shear nails.

[0079] In this embodiment, the two ends of the wheel box 51 are fixedly connected to the platform longitudinal beam 2 through a connecting arm 514, and the other side of the connection between the platform longitudinal beam 2 and the connecting arm 514 is fixedly connected to the platform cross beam 3 or the reinforcing cross beam 30 through a wheel box brace 515.

[0080] When the wheel box 51 is arranged near the platform cross beam 3, the other side of the connection between the platform longitudinal beam 2 and the connecting arm 514 is fixedly connected to the platform cross beam 3 through the wheel box brace 515. When the wheel box 51 is arranged near the reinforcing cross beam 30, the other side of the connection between the platform longitudinal beam 2 and the connecting arm 514 is fixedly connected to the reinforcing cross beam 30 through the wheel box brace 515. The running device 5 can be reinforced by the connecting arm 514 and the wheel box brace 515 to ensure its connection stability.

[0081] Furthermore, the side plates 511 of the two wheel boxes 51 located on one side of the longitudinal bridge can also be connected by a guide plate 54, and the guide plate 54 can further limit and guide the steel wheel 53.

[0082] See also Figure 10-11 As shown, in this embodiment, the running device 5 further includes two tractors 55. Each tractor 55 is fixed to a platform longitudinal beam 2, one end of the tractor 55 is connected to a fixing member 56 through a steel wire rope, and the other end of the tractor 55 is connected to a traction member 57 through a steel wire rope, the fixing member 56 is fixed to the platform cross beam 3, and the traction member 57 is fixed to the steel longitudinal beam 6 or small longitudinal beam 7 where the platform longitudinal beam 2 is located. The traction member 57 can also be fixed to the platform longitudinal beam 2 of the adjacent protection platform.

[0083] When the platform panel 1 needs to be moved, the traction member 57 is first fixed to the required position of the steel longitudinal beam 6 or the small longitudinal beam 7. At this time, the distance between the traction member 57 and the traction device 55 is greater than the required moving distance; then the traction device 55 is started to drive the steel wheel 53 to roll by tightening the wire rope; when the next movement is required, the traction member 57 is fixed to another required position on the steel longitudinal beam 6 or the small longitudinal beam 7. The traction device 55 is an electric traction device, and the parameters of the electric traction device should meet the traction force and space requirements.

[0084] See also Figure 12-13 As shown, preferably, the support adjustment mechanism 4 includes an adjustment sleeve 41 and an adjustment bolt 42 passing through the adjustment sleeve 41 . The adjustment sleeve 41 is fixed on the platform longitudinal beam 2 , and an inner wall of the adjustment sleeve 41 is formed with an internal thread matched with the adjustment bolt 42 .

[0085] When the platform longitudinal beam 2 is an I-beam, two adjusting sleeves 41 can be provided and fixed respectively on both sides of the web in the middle of the I-beam, and corresponding through holes are provided on the two parallel end surfaces of the I-beam to facilitate the passage of the adjusting bolt 42. When the protection platform does not need to be walked, the adjusting bolt 42 is screwed out until it abuts against the corresponding steel longitudinal beam 6 or small longitudinal beam 7 to form a fulcrum for the platform panel 1.

[0086] In this embodiment, a plurality of longitudinal ribs 21 are arranged between the two platform longitudinal beams 2, and the two ends of the longitudinal ribs 21 are respectively fixed to the upper surfaces of the two platform transverse beams 3. A plurality of transverse ribs 31 are arranged between the two platform transverse beams 3, and the two ends of the transverse ribs 31 are respectively fixed to the upper surfaces of the two platform longitudinal beams 2. The longitudinal ribs 21 and the transverse ribs 31 are welded and fixed, and the platform panel 1 is respectively welded and fixed to the longitudinal ribs 21 and the transverse ribs 31.

[0087] Furthermore, a reinforcing longitudinal beam 20 is provided between the two platform longitudinal beams 2, and the two ends of the reinforcing longitudinal beam 20 are respectively fixed on the two platform cross beams 3. The web of the platform cross beam 3 is provided with a stiffening plate, and the ends of the reinforcing longitudinal beam 20 are welded and fixed to the stiffening plate of the web of the platform cross beam 3.

[0088] Each platform cross beam 3 is provided with two mutually intersecting oblique ribs between the parts located on both sides of the above-mentioned reinforcing longitudinal beam 20 and the opposite reinforcing cross beam 30. Preferably, the oblique ribs can be provided at the upper and lower sides and welded and fixed on the platform cross beam 3 and the reinforcing cross beam 30 to further strengthen the strength of the protection platform.

[0089] In this embodiment, a railing 22 is provided on one side of each platform longitudinal beam 2 close to the forward direction, and a through hole is provided on the platform panel 1 for the railing 22 to pass through. The railings 22 on the same platform longitudinal beam 2 are connected by a skirting board, and the skirting board is welded and fixed on the platform panel 1. The skirting board is used to strengthen the protection of the construction workers of the platform panel 1.

[0090] This embodiment also provides a method for constructing a steel-concrete composite beam bridge deck using the above-mentioned protective platform, which is suitable for the construction of steel-concrete composite beam bridge decks in the highway and railway industries. The construction method includes the following steps:

[0091] S1. See Fig.14 As shown, processed protection platforms are set up between the steel longitudinal beam 6 and the small longitudinal beam 7, and between adjacent small longitudinal beams 7. Therefore, the number of protection platforms is one more than the number of small longitudinal beams 7, and multiple protection platforms are all in the designed positions.

[0092] The area between the platform beam 3 of one of the protection platforms away from the forward direction and the reinforcing beam 30 arranged relative to the platform beam 3 is the installation area of ​​the bridge deck to be installed. The turning platform 11 of the protection platform and the bridge beam 8 below it are in the same vertical plane, and the design positions of the remaining protection platforms must ensure that protection is provided on all sides during the construction of the bridge deck.

[0093] In this embodiment, the protection platform is designed to be 2.5 spans in the longitudinal direction of the bridge, the platform between the platform cross beam 3 at the front end and the opposite reinforcing cross beam 30 is 1.5 spans, the steel wheel 53 is arranged at the middle span and the front end, and the rear span of the protection platform is designed to be a cantilever state with a support adjustment mechanism 4. The cantilever state of the rear span of the protection platform can avoid the conflict between the protection platform and the embedded steel bars of the adjacent bridge deck to be installed.

[0094] S2. After opening the above-mentioned turning platform 11, the construction personnel can install the rubber strip 9 on the top surface of the steel longitudinal beam 6, the top surface of the small longitudinal beam 7, and the top surface of the bridge cross beam 8 corresponding to the bridge deck to be installed on the protective platform, the top surface of the steel longitudinal beam or the installed bridge deck. After the rubber strip 9 is installed, the turning platform 11 is closed.

[0095] S3. See Fig.15 As shown, the bridge deck to be installed is hoisted above the installation area by a beam top crane and slowly dropped to a position 10 cm above the protection platform; at the same time, the tractor 55 is used to drive the running device 5 to move, so as to drive the protection platform to move along the longitudinal direction of the bridge to the position of the adjacent bridge deck to be installed.

[0096] S4. See Fig.16 As shown, the construction workers stand on the protection platform, the top surface of the steel longitudinal beam, the top surface of the small longitudinal beam or the top surface of the bridge cross beam, adjust the relative positions of the embedded steel bars, rubber strips 9 and the shear nails on the top of the beam of the bridge deck to be installed, and then install and fix the bridge deck.

[0097] S5. Using the currently installed bridge deck as partial protection, continue installing other bridge decks until all bridge decks are installed.

[0098] In this embodiment, when the above-mentioned bridge deck to be installed is installed, protective components are arranged around it, and the above-mentioned protective components are protective platforms, installed bridge decks or steel longitudinal beams 6. Among them, when constructing the bridge deck at the end along the longitudinal bridge direction, a steel cross beam can also be used as a protective component.

[0099] In this embodiment, when installing the rubber strip 9, the support adjustment mechanism 4 is adjusted to support the steel longitudinal beam 6 or the small longitudinal beam 7 where it is located to ensure the stability of the protective platform. When the protective platform needs to be moved, the support adjustment mechanism 4 can be retracted. After the protective platform moves to the next design position, it is lowered by the adjustment bolt 42 of the support adjustment mechanism 4 to form a fulcrum.

[0100] According to the method of this embodiment, when the bridge deck to be installed is installed, protective platforms, installed bridge decks or steel longitudinal beams are provided on all sides of the bridge deck to be installed. The protective components on all sides ensure that there is no air-exposed section during the bridge deck construction process, thereby reducing safety risks. In addition, there is no need to hang safety ropes during the construction process, thereby freeing up operating space and accelerating the construction progress.

[0101] The present invention is not limited to the above-mentioned embodiments. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A protective platform for the construction of a steel-concrete composite beam bridge deck, wherein the steel-concrete composite beam comprises two steel longitudinal beams (6), a plurality of small longitudinal beams (7) arranged in parallel between the two steel longitudinal beams (6), and a plurality of bridge cross beams (8) perpendicular to the steel longitudinal beams (6), wherein the protective platform is erected between the steel longitudinal beam (6) and the small longitudinal beam (7) arranged relative to the steel longitudinal beam (6), or between adjacent small longitudinal beams (7), and wherein: The protection platform comprises: A platform panel (1) having an opening in the middle thereof, wherein a turning platform (11) is hingedly connected in the opening; Two platform longitudinal beams (2) are arranged oppositely on two sides below the platform panel (1); Two platform cross beams (3), with two ends of each platform cross beam (3) respectively connected to the ends of two platform longitudinal beams (2); Two reinforcing cross beams (30) are respectively arranged on both sides below the opening, and the two ends of each reinforcing cross beam (30) are respectively connected to the two platform longitudinal beams (2), and the distance between the platform cross beam (3) away from the advancing direction of the protection platform and the reinforcing cross beam (30) opposite to it is greater than the spacing between adjacent bridge cross beams (8) and less than the longitudinal length of a single bridge deck; Two support adjustment mechanisms (4), each support adjustment mechanism (4) is arranged at an end of a platform longitudinal beam (2) away from the forward direction; Four running devices (5), with every two running devices (5) being arranged at intervals below a platform longitudinal beam (2); The running device (5) comprises: The wheel box (51) comprises two side plates (511) arranged opposite to each other, an end plate (512) connecting the two side plates (511), and a top plate (513) located above the side plates (511) and the end plates (512), wherein the top plate (513) is fixedly connected to the side plates (511) and the end plates (512) respectively; A pin shaft (52), both ends of which are fixed to the two side plates (511) respectively; A steel wheel (53) is sleeved on the pin shaft (52) via a bearing (531), and a wear-resistant rubber layer (532) is provided on the surface of the steel wheel (53); The steel longitudinal beam (6) is provided with at least two rows of shear nails, and the small longitudinal beam (7) is provided with at least four rows of shear nails, and a track of the steel wheel (53) is formed between two adjacent rows of shear nails, and the lower end surface of the side plate (511) is lower than the upper end surface of the shear nails; The running device (5) also includes two traction devices (55), each traction device (55) is fixed to a platform longitudinal beam (2), one end of the traction device (55) is connected to a fixing member (56) via a steel wire rope, and the other end thereof is connected to a traction member (57) via a steel wire rope, the fixing member (56) is fixed to the platform cross beam (3), and the traction member (57) is fixed to the steel longitudinal beam (6) where the platform longitudinal beam (2) is located or to the platform longitudinal beam of an adjacent protective platform.

2. The protective platform for steel-concrete composite beam bridge deck construction as claimed in claim 1, characterized in that: The distance between a platform crossbeam (3) close to the advancing direction and its opposite reinforcing crossbeam (30) is greater than the distance between another platform crossbeam (3) and its opposite reinforcing crossbeam (30).

3. The protective platform for steel-concrete composite beam bridge deck construction according to claim 1, characterized in that: The two ends of the wheel box (51) are fixedly connected to the platform longitudinal beam (2) through a connecting arm (514), and the other side of the connection between the platform longitudinal beam (2) and the connecting arm (514) is fixedly connected to the platform cross beam (3) or the reinforcing cross beam (30) through a wheel box diagonal brace (515); The side plates (511) of the two wheel boxes (51) located on one side of the longitudinal bridge are connected via a guide plate (54).

4. The protective platform for steel-concrete composite beam bridge deck construction according to claim 1, characterized in that: The support adjustment mechanism (4) comprises an adjustment sleeve (41) and an adjustment bolt (42) passing through the adjustment sleeve (41); the adjustment sleeve (41) is fixed to the platform longitudinal beam (2); and an inner wall of the adjustment sleeve (41) is formed with an internal thread matched with the adjustment bolt (42).

5. The protective platform for steel-concrete composite beam bridge deck construction according to claim 1, characterized in that: A plurality of longitudinal ribs (21) are arranged at intervals between the two platform longitudinal beams (2), and two ends of the longitudinal ribs (21) are respectively fixed to the upper surfaces of the two platform cross beams (3); A plurality of transverse ribs (31) are arranged at intervals between the two platform transverse beams (3), and two ends of the transverse ribs (31) are respectively fixed to the upper surfaces of the two platform longitudinal beams (2); The platform panel (1) is respectively welded and fixed to the longitudinal ribs (21) and the transverse ribs (31); A reinforcing longitudinal beam (20) is also provided in the middle of the two platform longitudinal beams (2), and the two ends of the reinforcing longitudinal beam (20) are respectively fixed to the two platform cross beams (3); The part of each platform crossbeam (3) located on both sides of the reinforcing longitudinal beam (20) and the opposite reinforcing crossbeam (30) are provided with two mutually intersecting oblique ribs.

6. A method for constructing a steel-concrete composite beam bridge deck using the protective platform of claim 1, characterized in that: It includes the steps of: A protective platform is set up between the steel longitudinal beam (6) and the small longitudinal beam (7), and between adjacent small longitudinal beams (7); the area between one of the protective platforms, which is away from the platform cross beam (3) in the forward direction, and the reinforcing cross beam (30) arranged relative to the platform cross beam (3), is the installation area of ​​the bridge deck to be installed; Open the turning table (11), and install rubber strips on the top surface of the steel longitudinal beam (6), the top surface of the small longitudinal beam (7), and the top surface of the bridge cross beam (8) corresponding to the bridge deck to be installed; The bridge deck to be installed is hoisted above the installation area, and the protective platform is driven by a running device (5) to move along the longitudinal direction of the bridge to the position of the adjacent bridge deck to be installed; Adjusting the relative positions of the bridge deck to be installed and the rubber strip, and installing and fixing them; Using the currently installed bridge deck as partial protection, continue installing other bridge decks until all bridge decks are installed.

7. The method for constructing a steel-concrete composite beam bridge deck as claimed in claim 6, characterized in that: When the bridge deck to be installed is installed, protective components are arranged on all sides thereof, wherein the protective components are protective platforms, installed bridge decks or steel longitudinal beams (6).

8. The method for constructing a steel-concrete composite beam bridge deck as claimed in claim 6, characterized in that: When the rubber strip is installed, the adjustment support adjustment mechanism (4) is supported on the steel longitudinal beam (6) or the small longitudinal beam (7) where it is located.

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