Remote control adjustable steel box girder cantilever construction channel and construction method thereof

Abstract

Provided is a remote-controlled adjustable steel box girder cantilever arm construction channel and a construction method thereof, comprising the following steps: lofting calculation - adjusting size - steel box girder construction - construction channel construction - use of the construction channel and then cantilever arm construction. The invention has a simple structure and does not require additional investment; the lower support and the upper support are combined, the support is stable, and the construction is accurate and shake-free; the remote control drives the construction channel to move horizontally, effectively ensuring the continuity of construction, saving manpower, and improving construction efficiency; the construction channel size can be adaptively adjusted according to the change in the cantilever arm size, and has strong versatility.

Description

Technical Field

[0001] The invention belongs to the technical field of cantilever erection and assembly equipment for fixed building bridges, and in particular relates to a remote-controlled adjustable steel box girder cantilever construction channel and a construction method thereof. Background Art

[0002] Steel box girder bridges are increasingly used due to their many advantages, such as convenient construction, fast erection, and green and pollution-free. The cantilever in a steel box girder bridge is the key to reducing wind vibration in the steel box girder. It plays a vital role in reducing wind vibration in the entire steel box girder structure and is an indispensable structure for the steel box girder.

[0003] At present, due to the interference of the bracket, the steel box girder installed by the bracket method cannot be welded and painted at the cantilever by a bridge inspection vehicle. In this regard, a hanging basket is generally installed at the cantilever to complete the painting and welding construction. However, the disadvantages of using a hanging basket are: (1) There is no support point at the bottom of the hanging basket, and it shakes a lot during use, making it difficult to achieve precise construction and posing a major safety hazard; (2) Once the cross-sectional structural dimensions of the cantilever arm change, the original hanging basket cannot be used again, or it needs to be modified before it can be used again, which is not universal; and the manufacturing process of the hanging basket is complicated, resulting in serious waste of materials; (3) The hanging basket under the existing technology needs to be moved by human push and pull, and the displacement operation is labor-intensive, time-consuming, and labor-intensive. At the same time, it makes it impossible to continuously operate the painting and welding, and the construction efficiency is low. In this regard, the following improved technical solutions are proposed. Summary of the invention

[0004] The technical problem solved by the present invention is: to provide a remote-controlled adjustable steel box girder cantilever construction channel and a construction method thereof, so as to solve the technical problems that the steel box girder cantilever construction channel has no bottom support, there are shaking and safety hazards; the size cannot be adaptively adjusted; and the manual displacement operation is labor-intensive, time-consuming and labor-intensive.

[0005] The technical solution adopted by the present invention is a construction method of a remote-controlled adjustable steel box beam cantilever construction channel, comprising the following steps:

[0006] S001. Lofting calculation: Calculate the outline size of the construction channel by calculation or lofting according to the cross-sectional profile specifications of the cantilever arm;

[0007] S002, adjusting the size: manually adjusting the size of the upper platform, lower platform, vertical beam and lower support of the construction channel according to the calculated outline size of the construction channel, assembling the construction channel of the required size, checking whether the construction channel is qualified, and waiting for hoisting and installation after the construction channel is qualified;

[0008] S003, Steel box girder construction: first fix the cantilever arm on the top of the steel box girder support, and then fix the cantilever arm to the steel box girder body;

[0009] S004, construction channel construction: use a lifting device to hoist the construction channel that has passed the inspection in step S002 into place and after it has passed the inspection, use a safety rope to perform safety protection construction around the construction channel;

[0010] S005. Use of construction channel: The operator enters and exits the upper platform or the lower platform through the vertical beam, and controls the moving direction and speed of the construction channel through the remote control to carry out the cantilever construction.

[0011] It also includes a remote-controlled adjustable steel box girder cantilever construction channel, which has a U-shaped channel structure surrounding the cantilever composed of an upper platform, a vertical beam, and a lower platform, a counterweight box is provided at the top inner side of the upper platform; a traction wheel and an upper support wheel are provided at intervals and in parallel at the bottom inner side of the upper platform; the traction wheel and the upper support wheel roll on the upper end surface of the connection between the cantilever and the steel box girder body; the traction wheel is driven to rotate by a frequency conversion motor; and the frequency conversion motor is electrically connected to a remote control; a lower support is provided at the bottom inner side of the lower platform; a lower support wheel is provided at the bottom end of the lower support; the lower support wheel rolls on the upper end surface of the steel box girder bracket to support the entire construction channel from the bottom; the aforementioned upper platform, vertical beam, lower platform, and lower support respectively have size adjustment mechanisms, and the size adjustment mechanisms adjust the corresponding sizes according to changes in the cantilever size.

[0012] In the above technical solution, further: the size adjustment mechanism replaces the fixed plug-in position of the pins through multiple pins on the size extension line to lock the size of the size adjustment mechanism.

[0013] In the above technical solution, further: the upper end surface of the steel box beam support is provided with a U-shaped track with an open upper end; the lower support wheel and the U-shaped track are adapted for rolling friction to provide a linear guide for the rolling of the lower support wheel.

[0014] In the above technical solution, further: an adjustable diagonal brace is provided between the vertical beam and the lower platform; and between the lower platform and the lower support.

[0015] In the above technical solution, preferably: the adjustable diagonal brace adjusts the inclined support length of the adjustable diagonal brace through a screw sleeve and a screw rod.

[0016] In the above technical solution, further: the vertical beam is provided with a ladder; the vertical beam is also provided with a safety enclosure.

[0017] In the above technical solution, further: the upper platform, vertical beams, lower platform and lower support respectively have a square frame surrounded by horizontal beams and longitudinal beams; a plurality of longitudinal beams for reinforcement are respectively arranged in the square frames; and patterned plates are also arranged in the square frames of the upper platform and the lower platform.

[0018] The advantages of the present invention compared with the prior art are:

[0019] 1. The construction method of the present invention can save materials for the construction channel to the greatest extent.

[0020] 2. The present invention not only has an upper support hanging point, but also has a lower support point. There is no shaking during the construction process, which reduces the safety risk caused by shaking.

[0021] 3. The present invention controls the variable frequency motor through a remote controller, and can adjust the movement direction and running speed of the construction channel as needed to meet the requirements of continuous construction.

[0022] 4. The size of the construction channel of the present invention can be adaptively adjusted according to the size of the rocker arm model, and the adjustment is simple and convenient, and the multi-point fixation is reliable.

[0023] 5. The present invention does not require additional investment, has a simple structure, stable support, precise construction, guaranteed construction continuity, high efficiency and strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the present invention in use state;

[0025] Figure 2 It is the front view of the present invention;

[0026] Figure 3 for Figure 2 AA structural diagram in FIG.

[0027] Figure 4 for Figure 2 Schematic diagram of CC structure;

[0028] Figure 5 for Figure 2 DD direction structure diagram in;

[0029] Figure 6 for Figure 2 EE structure diagram in the figure;

[0030] Figure 7 It is a flow chart of the construction method of the present invention;

[0031] In the figure: 1-steel box girder support, 2-cantilever arm, 3-steel box girder body, 4-construction channel, 5-upper platform, 6-lower platform, 7-vertical beam, 8-lower support, 9-counterweight box, 10-traction wheel, 11-upper support wheel, 12-frequency conversion motor, 13-adjustable diagonal brace, 14-safety enclosure, 15-cross beam, 16-longitudinal beam, 17-patterned plate; 801-lower support wheel, 802-U-shaped track, 701-ladder. DETAILED DESCRIPTION

[0032] The following will be combined with the attached embodiment of the present invention Figure 1-7, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] (like Figure 7 The construction method of the remote-controlled adjustable steel box girder cantilever construction channel comprises the following steps:

[0034] Step S001, layout calculation: Calculate the outline size of the construction channel 4 by calculation or layout according to the cross-sectional profile specifications of the cantilever arm 2. The construction channel size obtained by layout or accurate calculation can save materials for the construction channel to the maximum extent, reduce costs and increase efficiency.

[0035] Step S002, adjusting the size: manually adjust the sizes of the upper platform 5, the lower platform 6, the vertical beam 7 and the lower support 8 of the construction channel 4 according to the calculated outline size of the construction channel 4, assemble the construction channel 4 of the required size on the ground, check whether the construction channel 4 is qualified, that is, whether the size meets the requirements, and after the construction channel 4 is checked and qualified, place it on the ground and wait to be hoisted and installed.

[0036] Step S003, steel box girder construction: first, fix the cantilever arm 2 on the top of the steel box girder support 1, and then fix the cantilever arm 2 to the steel box girder body 3.

[0037] Step S004, construction of construction channel: After the construction channel 4 that has passed the inspection in step S002 is hoisted into place using lifting equipment such as a crane and passed the inspection, it is ensured that the counterweight box 9 can firmly press down the inside of the construction channel to prevent the construction channel from turning outward. Next, a safety rope is used to perform safety protection construction around the construction channel 4. Specifically, the safety rope can be freely disassembled and formed into a flexible enclosure structure with the construction channel by tying. As needed, the construction channel is provided with a plurality of tying ear plates or tying rings for tying flexible safety ropes. At the same time, ensure that the lower support wheel 801 of the construction channel is included in the U-shaped track 802.

[0038] Step S005, use of the construction channel: the operator enters and exits the upper platform 5 or the lower platform 6 through the ladder 701 on the vertical beam 7, and remotely controls the variable frequency motor 12 of the construction channel 4 through the remote controller, and then remotely controls the moving direction and moving speed of the construction channel, so as to continuously and efficiently construct the boom. Specifically, the remote controller remotely controls the speed and direction of rotation of the variable frequency motor 12 to adjust the moving direction and moving speed of the construction channel 4.

[0039] (like Figure 1 , Figure 2The invention also includes a remote-controlled adjustable steel box beam cantilever construction channel: a U-shaped channel structure around the cantilever 2 consisting of an upper platform 5, a vertical beam 7, and a lower platform 6. The U-shaped channel structure is the same as the U-shaped structure of a movable telescopic cantilever hanging basket disclosed in the announcement number CN210856969U, and will not be described in detail here.

[0040] The difference from the hanging basket in the prior art is that the top inner side of the upper platform 5 of the present invention is provided with a counterweight box 9. The counterweight box 9 is arranged at the innermost top of the construction channel 4, and is used to press down the inner side of the construction channel 4 to adjust the center of gravity, prevent the construction channel from turning outward, and prevent the construction channel 4 from shaking.

[0041] The inner bottom of the upper platform 5 is also provided with a traction wheel 10 and an upper support wheel 11 which are spaced and parallel to each other; the traction wheel 10 and the upper support wheel 11 roll on the upper end surface of the connection between the cantilever arm 2 and the steel box beam body 3. The traction wheel 10 and the upper support wheel 11 have the same hanging point structure as the upper support of the hanging basket installed in the prior art.

[0042] The difference is that the traction wheel 10 of the present invention is driven to rotate by the variable frequency motor 12; and the variable frequency motor 12 is electrically connected to the remote control. Specifically, the traction wheel 10 is coaxially fixedly installed on the traction wheel shaft, and the traction wheel shaft is coaxially fixedly connected to the power output end of the variable frequency motor 12 through a coupling, so that the traction wheel shaft is driven by the variable frequency motor 12, and the traction wheel 10 is coaxially actively rotated. The electrical connection method between the remote control and the variable frequency motor belongs to the prior art: wherein, the remote control can select the A1015 motor speed control remote control produced by Yancheng Ruijiu Electromechanical Technology Co., Ltd.

[0043] Therefore, the present invention controls the variable frequency motor through a remote controller, and can adjust the movement direction and running speed of the construction channel 4 as needed to meet the continuous construction requirements and improve the construction efficiency.

[0044] A lower support 8 is provided at the inner bottom of the lower platform 6; a lower support wheel 801 is provided at the bottom end of the lower support 8; the lower support wheel 801 rolls on the upper end surface of the steel box beam support 1 to support the entire construction channel 4 from the bottom.

[0045] Therefore, the present invention not only has an upper support hanging point, but also has a lower support point, so the construction process is safe and without shaking, thus reducing the safety risk hidden danger caused by shaking.

[0046] (like Figure 2 As shown in the figure, the upper platform 5, the vertical beam 7, the lower platform 6, and the lower support 8 are provided with size adjustment mechanisms respectively, and the size adjustment mechanisms adjust the corresponding sizes according to the size changes of the cantilever arm 2. It should be understood that any rigid telescopic structure that can achieve size adjustment and size telescopic position locking is applicable to this case. For example, the size adjustment mechanism composed of a sleeve, a plug rod, and a plurality of linearly arranged top screws.

[0047] Therefore, the size of the construction channel of the present invention can be adaptively adjusted according to the size of the rocker arm model, and the adjustment is simple and convenient, and the multi-point fixation is firm and reliable.

[0048] (like Figure 2 ) In the above embodiment, preferably: the size adjustment mechanism locks the size of the size adjustment mechanism by replacing the pin fixing plug-in position through multiple pins on the size extension line.

[0049] (Combined Figure 5 ) Specifically, the size adjustment mechanism of the upper platform 5 is taken as an example: the upper platform 5 includes a square frame surrounded by a horizontal beam 15 and a longitudinal beam 16, and the square frame has two, and the horizontal beams 15 spaced parallel in the two square frames are adapted to be pulled out horizontally, and the pull-out adaptation connection of the two square frames is provided with a plurality of pin holes arranged horizontally, and the pin holes at different positions of the pull-out connection of the two square frames are coaxially fixed and plugged, so as to lock the adjusted size of the upper platform 5. The adjustment and locking principles of the remaining size adjustment mechanisms are the same and will not be repeated.

[0050] (like Figure 1 , Figure 2 ) In the above embodiment, further: the upper end surface of the steel box beam support 1 is provided with a U-shaped track 802 with an open upper end; the U-shaped track 802 is arranged in a straight line along the extension direction of the bridge. The lower support wheel 801 and the U-shaped track 802 are adapted to provide a linear guide for the rolling of the lower support wheel 801 to prevent eccentric load yaw. At the same time, the U-shaped track 802 is made of steel, and the material is easy to obtain.

[0051] In the above embodiment, further: an adjustable diagonal brace 13 is provided between the vertical beam 7 and the lower platform 6; and between the lower platform 6 and the lower support 8. The two ends of the adjustable diagonal brace 13 respectively use ear plate connection structures to connect the vertical beam 7, the lower platform 6, and the lower support 8. The adjustable diagonal brace 13 improves the structural support strength and rigidity of the U-shaped vertical connection structure of the construction channel based on the principle that a triangle has stability.

[0052] In the above embodiment, further: the adjustable diagonal brace 13 is screwed and fitted with the axially extending screw rod through the axially extending screw sleeve, so as to adjust the inclined supporting length of the adjustable diagonal brace 13 .

[0053] (like Figure 4 In the above embodiment, further: the vertical beam 7 is provided with a ladder 701; the ladder 701 is used for turnover between the upper and lower platforms. The vertical beam 7 is also provided with a safety enclosure 14. The safety enclosure 14 is a rigid structure to improve the safety of people going up and down.

[0054] (like Figure 5 , Figure 6In the above embodiment, the upper platform 5, the vertical beam 7, the lower platform 6, and the lower support 8 are respectively provided with a square frame surrounded by a horizontal beam 15 and a longitudinal beam 16; a plurality of longitudinal beams 16 for reinforcement are respectively provided in the square frame; and a pattern plate 17 is also provided in the square frame of the upper platform 5 and the lower platform 6, and the pattern of the pattern plate is used for anti-slip function. The longitudinal beams and the horizontal beams are respectively made of steel and welded to form a frame structure.

[0055] From the above description, it can be found that after the cantilever arm of the present invention is installed in place, the cantilever arm and the steel box girder body are fixedly connected as one through the code plate code, and the present invention is installed in place by a crane. After power is turned on, the operator stands on the lower platform and controls the variable frequency motor through the remote control to adjust the running direction and running speed of the construction channel as needed. The traction wheel and the upper support wheel use the steel box girder body and the bridge deck at the upper end of the cantilever arm as the walking track, and the lower support wheel runs in the special U-shaped track on the steel box girder bracket.

[0056] When the outline size of the boom changes, the present invention can adjust the overall outline size of the construction channel by adjusting the crossbeam misalignment plug-in position and the length of the screw sleeve extending axially from the screw rod: that is, the crossbeam size changes by changing the relative pin hole position, and the screw rod changes the extension length of the screw rod through the thread. The operator reaches the upper platform by climbing the ladder and can start the construction work on the upper platform.

[0057] In summary, the present invention requires no additional investment, has a simple structure, stable support, precise construction, ensures construction continuity, and has strong adaptability.

[0058] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A construction method for a remotely controlled adjustable steel box girder cantilever construction channel, characterized in that: The steps include: S001, layout calculation: according to the cross-sectional profile specifications of the boom (2), the outline dimensions of the construction channel (4) are calculated or laid out; S002, adjusting the size: manually adjusting the size of the upper platform (5), the lower platform (6), the vertical beam (7) and the lower support (8) of the construction channel (4) according to the calculated outline size of the construction channel (4), assembling the construction channel (4) of the required size, checking whether the construction channel (4) is qualified, and waiting for the construction channel (4) to be hoisted and installed after the inspection is qualified; S003, steel box girder construction: first, a cantilever arm (2) is fixedly installed on the top of the steel box girder support (1), and then the cantilever arm (2) is fixedly connected to the steel box girder body (3); S004, construction of construction channel: after the construction channel (4) that has passed the inspection in step S002 is hoisted into place using a lifting device and passed the inspection, a safety protection rope is used to perform safety protection construction around the construction channel (4); S005. Use of the construction channel: The operator enters and exits the upper platform (5) or the lower platform (6) through the vertical beam (7), and controls the moving direction and speed of the construction channel (4) by remote control to perform construction on the boom; The remote-controlled adjustable steel box girder cantilever construction channel used in the construction method of the remote-controlled adjustable steel box girder cantilever construction channel has a U-shaped channel structure surrounding the cantilever (2) and composed of an upper platform (5), a vertical beam (7), and a lower platform (6); a counterweight box (9) is provided at the top inner side of the upper platform (5); a traction wheel (10) and an upper support wheel (11) are provided at the bottom inner side of the upper platform (5) and are spaced and parallel; the traction wheel (10) and the upper support wheel (11) roll on the upper end surface of the connection between the cantilever (2) and the steel box girder body (3); ...); the traction wheel (10) and the upper support wheel (11) roll The wheel (10) is driven to rotate by a variable frequency motor (12); and the variable frequency motor (12) is electrically connected to a remote control; a lower support (8) is provided at the inner bottom of the lower platform (6); a lower support wheel (801) is provided at the bottom end of the lower support (8); the lower support wheel (801) rolls on the upper end surface of the steel box beam support (1) to support the entire construction channel (4) from the bottom; the upper platform (5), the vertical beam (7), the lower platform (6), and the lower support (8) are respectively provided with a size adjustment mechanism, and the size adjustment mechanism adjusts the corresponding size according to the size change of the cantilever arm (2); The size adjustment mechanism locks the size of the size adjustment mechanism by replacing a plurality of pins on the size extension line to fix the plug-in position of the pins; The upper end surface of the steel box beam support (1) is provided with a U-shaped track (802) with an open upper end; the lower support wheel (801) and the U-shaped track (802) are adapted to roll frictionally with each other to provide a linear guide for the rolling of the lower support wheel (801).

2. The construction method of the remote-controlled adjustable steel box girder cantilever construction channel according to claim 1 is characterized in that: An adjustable diagonal brace (13) is provided between the vertical beam (7) and the lower platform (6); and between the lower platform (6) and the lower support (8).

3. The construction method of the remote-controlled adjustable steel box girder cantilever construction channel according to claim 2 is characterized in that: The adjustable diagonal brace (13) is used to adjust the inclined support length of the adjustable diagonal brace (13) through a threaded sleeve and a screw rod.

4. The construction method of the remote-controlled adjustable steel box girder cantilever construction channel according to claim 3 is characterized in that: The vertical beam (7) is provided with a ladder (701); the vertical beam (7) is also provided with a safety enclosure (14).

5. The construction method of the remote-controlled adjustable steel box girder cantilever construction channel according to claim 2 is characterized in that: The upper platform (5), vertical beams (7), lower platform (6), and lower support (8) each have a square frame surrounded by a horizontal beam (15) and a longitudinal beam (16); a plurality of longitudinal beams (16) for reinforcement are respectively arranged in the square frame; and a patterned plate (17) is also arranged in the square frame of the upper platform (5) and the lower platform (6).

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