CN116427303A - An amphibious light work platform and its installation method - Google Patents

Abstract

The invention relates to an amphibious light work platform and an installation method thereof. The amphibious light work platform includes a platform frame, a steel springboard laid and fixed on the platform frame; the platform frame is spliced by horizontal aluminum alloy trusses and longitudinal aluminum alloy trusses; A plurality of buoys, the buoys are used to make the platform frame float on the water surface; the amphibious light work platform also includes a lifting point support structure, and the lifting point support structure includes a number of first ends and the preset lifting point of the platform frame. The connected steel wire ropes are disassembled, and the second ends of each steel wire rope can pass through the corresponding lifting point holes opened on the bridge and overlapped on the bearing parts arranged on the bridge deck. Under the premise of meeting the construction load requirements, the amphibious light work platform reduces the self-weight of the platform, improves the working space of the platform, and can realize free assembly, is suitable for different construction scenarios on land and in water, and improves the disassembly and transition of the platform. efficiency.

Description

An amphibious light work platform and its installation method

technical field

The invention relates to the technical field of road and bridge construction equipment, in particular to an amphibious light work platform and an installation method thereof.

Background technique

With the continuous development of social economy, the traffic volume of roads is increasing day by day, and the load class has changed. A large number of bridges built in the 1980s and before have been difficult to meet the current road traffic needs according to the design standards at that time. At the same time, due to various reasons such as maintenance management defects, most bridges, especially local bridges, cannot be repaired and maintained in time after they are damaged, and the problem of bridge work with diseases has become increasingly prominent.

In recent years, the domestic research on the construction work platform technology of the integral hanger of the bridge has developed rapidly. The overall bridge hanger construction work platform is used for bridge maintenance and reinforcement, which has the characteristics of safety and efficiency. With the increase of domestic bridge maintenance and reinforcement projects, the technical level of the overall bridge hanger construction work platform has been greatly improved in recent years, and a lot of valuable design and construction experience has been accumulated. However, the current design and construction mainly rely on experience, and most of them are steel pipe hanger work platforms or steel composite hanger work platforms. The steel pipe hanger work platforms have great safety hazards in the process of erection and dismantling, and the lifting points that need to be set are relatively large. Many, construction space is limited. The steel combined hanger work platform has high safety, but it is relatively heavy, and the transfer requires the cooperation of large machinery, and the turnover efficiency is low. Therefore, many problems need to be further studied.

Contents of the invention

In view of the above problems, the present invention is proposed to provide an amphibious light work platform and an installation method thereof which overcome the above problems or at least partly solve the above problems.

In the first aspect, the embodiment of the present invention provides an amphibious light work platform, the amphibious light work platform includes a platform frame, a steel springboard laid and fixed on the platform frame; the platform frame is made of transverse aluminum alloy Trusses and longitudinal aluminum alloy trusses are spliced together; the platform frame is arranged with several detachable buoys, and the buoys are used to make the platform frame float on the water; the amphibious light work platform also includes a lifting point support structure, The supporting structure of the lifting point includes a plurality of steel wire ropes whose first ends are detachably connected to the preset lifting points of the platform frame. on the carrier.

In one embodiment, the steel springboards are composed of several first steel springboards, and there are overlapping parts between adjacent first steel springboards, and the overlapping parts are locked by screws and fixed to the platform frame by iron wires.

In one embodiment, the bearing member includes two channel steels with notches facing away from each other, and the second end of the steel wire rope is provided with a bridging piece, and the bridging piece is formed with two horizontal and oppositely arranged bearing parts , each load-bearing part is lapped on the corresponding channel steel.

In one embodiment, the wicker includes a handle for adjusting the position of the wicker.

In one embodiment, the amphibious light work platform further includes a cantilever platform, and the cantilever platform can reduce or eliminate the amphibious light work platform operation and cover when the amphibious light work platform is in operation. The gap between the two beams; the cantilevered platform includes a number of steel pipes firmly connected to the horizontal aluminum alloy trusses in the platform frame close to the cover beam through fasteners, and a second steel springboard laid and fixed on the steel pipes.

In one embodiment, the amphibious light work platform further includes safety guardrails arranged around the amphibious light work platform, and ladders connecting the ground and the amphibious light work platform, or connecting the bridge deck with the amphibious two Ladders with light work platforms.

In the second aspect, an embodiment of the present invention provides an installation method of an amphibious light work platform, and the installation method includes the following steps:

Splice the horizontal aluminum alloy trusses and vertical aluminum alloy trusses into a platform frame, and lay and fix steel springboards on the platform frame;

Carry out lofting positioning and drilling of lifting point holes on the bridge, and then arrange a lifting system; the lifting system is composed of a number of mobile lifting trolleys, and each mobile lifting trolley is equipped with a counterweight, a boom, and a hoist;

Move the platform frame after laying the steel springboard to the bottom of the bridge span, and use the lifting system to lift it to the preset height;

Install a fixed lifting point and use a steel wire rope as a sling. The second end of the steel wire rope passes through the hole of the lifting point and overlaps the carrier. The first end of the steel wire rope bypasses the aluminum alloy truss corresponding to the preset lifting point and locks it with a shackle. ;

After the fixed lifting point is installed, the hoisting system slowly lowers the platform frame after the steel springboard is laid, and the lifting system is removed after the load is completely transferred to the fixed lifting point;

Install safety guardrails around the work platform, and install ladders connecting the ground and the work platform, or ladders connecting the bridge deck and the work platform.

In one embodiment, the contact position between the platform frame and the wire rope is provided with an arc-shaped steel plate.

In one embodiment, after removing the lifting system, it also includes

Fasteners are used to securely connect several steel pipes to the horizontal aluminum alloy truss close to the cover beam in the platform frame, and a second steel springboard is laid and fixed on the steel pipes to form a cantilevered platform; the cantilevered platform can reduce or eliminate amphibious use When the light work platform is in operation, the gap between the amphibious light work platform and the cover beam.

In one embodiment, after laying and fixing the steel springboard on the platform frame, it also includes

A number of detachable buoys are arranged on the platform frame, and the buoys are used to promote the platform frame to float on the water surface.

In the embodiment, the main structure of the amphibious light work platform is composed of aluminum alloy trusses and steel springboards. Under the premise of meeting the construction load requirements, the platform's self-weight can be reduced, the platform's work space can be improved, and free assembly can be realized. In different construction scenarios on land and water, the efficiency of platform disassembly and transition is improved, thereby reducing construction costs and speeding up construction progress. It is suitable for scenes with low loads such as bridge maintenance and reinforcement operations.

Description of drawings

The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation of the present application, and explain the principle of the present application together with the text description. Apparently, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without any creative effort. In the attached picture:

Figure 1 is a schematic diagram of the longitudinal installation of an amphibious light work platform according to an embodiment of the present invention;

Figure 2 is a schematic diagram of the horizontal installation of the amphibious light work platform shown in Figure 1;

Fig. 3 is an enlarged view of part A in Fig. 2;

Fig. 4 is the structural schematic diagram of lap joint;

Fig. 5 is a schematic diagram of the arrangement of lifting points of the amphibious light work platform shown in Fig. 1;

Explanation of reference signs: 1. platform skeleton; 2. horizontal aluminum alloy truss; 3. longitudinal aluminum alloy truss; 4. buoy; 5. steel wire rope; Handle; 10, vertical connection; 11, shackle; 12, steel pipe; 13, safety guardrail; 14, ladder; 20, cover beam; 21, column.

Detailed ways

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, but should not be construed as limitations of the present invention. Those of ordinary skill in the art can There are numerous changes, modifications, substitutions and variations to these embodiments, the scope of the present invention being defined by the claims and their equivalents.

The terms "center", "longitudinal", "transverse", "length", "upper", "lower", "left", "right", "vertical" mentioned or may be mentioned in the description of the present invention , "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation shown in the drawings Or positional relationship is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. Additionally, the terms "comprises," "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral Ground connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

An amphibious light work platform according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The amphibious light work platform can be applied to a dangerous bridge reconstruction project.

The bridge crosses the river. The total width of the bridge deck is 12.5m. It is 14×16m+5×25m+(52.5m+80m+52.5m)+8×25m+16×16m. The upper structure of the main bridge is a T-shaped steel structure, the hanging beam is a prestressed concrete simply supported T beam, 5 girders are set in a single span, and the lower structure is a thin-walled pier; the upper structure of the approach bridge is a 25m span prestressed concrete simply supported T beam and a 16m Ordinary reinforced concrete simply supported T-beams across the span, with 7 girders for each single span, and double-column piers as the substructure; There are 2 spans and 1 joint. Expansion joints are provided between each joint of the approach bridge and at both ends of the hanging beam of the main bridge. There are 24 expansion joints in the whole bridge. When strengthening the 16m and 25m span T beams of the approach bridge, the construction work surface is located under the bridge, and most of the bridge spans are located above the water, and the amphibious light work platform is used as the construction work platform.

Referring to Fig. 1 and Fig. 2, an amphibious light work platform according to an embodiment of the present invention, its structure includes a platform frame 1, a steel springboard laid and fixed on the platform frame 1 (not shown in the figure). The platform frame 1 is spliced by transverse aluminum alloy trusses 2 and longitudinal aluminum alloy trusses 3, wherein the transverse aluminum alloy trusses 2 are arranged in the direction of the bridge, the longitudinal aluminum alloy trusses 3 are arranged in the direction of the bridge, and the transverse aluminum alloy trusses 2 , Longitudinal aluminum alloy truss 3 The truss pipe type, section size, standard section length and the number of vertical and horizontal load-bearing beams can be adjusted and selected according to the load and actual conditions.

For example, as shown in Figure 5, for the 25m-span T-beam reinforcement of the approach bridge, the parameters of the platform frame 1 of the amphibious light-duty work platform can be specifically, the longitudinal length is 22.08m, the transverse width is 13m, and the longitudinal aluminum profile of 500 × 500mm is set longitudinally. There are 7 alloy trusses 3 (truss distribution beams), with a combined span of 6m+8m+6m, and 4 horizontal aluminum alloy trusses 2 (truss load-bearing beams) of 760×520mm. The selected aluminum alloy truss is 6061T6 aluminum alloy, its modulus of elasticity is 68.9Gpa, the design value of tensile strength is 200MPa, and the shear strength is 115MPa. The section resistance distance of the longitudinal aluminum alloy truss 3 is W=360766mm ³ , the moment of inertia I=90191572mm ⁴ , the section resistance distance of the transverse aluminum alloy truss 2 is W=860730mm ³ , and the moment of inertia I=223789684mm ⁴ .

The overall truss connection of the platform skeleton 1 should be straight and tight, and there should be no staggered platforms. The standard sections should be connected by flanges. Each truss is inspected, and the trusses with collision deformation, cracking and desoldering are replaced in time.

The steel springboard may be composed of several first steel springboards, and there are overlapping parts between adjacent first steel springboards, and the overlapping parts are locked by screws and fixed to the platform frame 1 by iron wires. The size of the first steel springboard can be 200*40cm, arranged horizontally, paved and paved steadily, there is an overlap of 5cm between adjacent first steel springboards, locked with self-tapping screws and fixed with iron wires and trusses. Of course, the first steel springboard can also adopt other suitable dimensions.

Returning now to Fig. 1 and Fig. 2, for the case where the construction work surface is located on the water surface, the platform framework 1 needs to be arranged with several detachable buoys 4, and the buoys 4 are used to make the platform framework 1 float on the water surface. The quantity of buoy 4 can be determined according to the dead weight of platform frame 1 after laying steel springboard. For the situation that the construction work surface is located on the ground, then there is no need to install the buoy 4.

The amphibious light work platform also includes a lifting point support structure, the lifting point support structure includes a number of steel wire ropes 5 whose first ends are detachably connected to the preset lifting points of the platform frame 1, and the second ends of each steel wire rope 5 can pass through The corresponding lifting point holes opened on the bridge are overlapped on the bearing parts 6 arranged on the bridge deck. Corresponding to the perspectives of Figures 1 and 2, the bottom end of the steel wire rope 5 is detachably connected to the preset lifting point of the platform frame 1, and the top end of the steel wire rope 5 can pass through the corresponding lifting point hole opened on the bridge and overlap it with the bridge laid on the bridge deck. on the carrier 6.

Specifically, in this embodiment, as shown in FIG. 3 , the bearing member 6 includes two channel steels with notches facing away from each other, and the second end of the steel wire rope 5 is provided with a bridging piece 7, and the bridging piece 7 is formed with two horizontal and opposite bearing parts 8, and each bearing part 8 is lapped on a corresponding channel steel. The bridge 7 can also include a handle 9 for adjusting the position of the bridge 7, a vertical connection 10 connected to the second end of the wire rope 5 and passing through the gap between two channel steels, the vertical The connection part 10 is formed with a through hole, and the vertical connection part 10 can be connected with the second end of the wire rope 5 through the shackle 11 .

Returning now to Fig. 1 and Fig. 2, in one embodiment, the amphibious light work platform further includes a cantilevered platform, and the cantilevered platform can reduce or eliminate the The gap between the dual-purpose light work platform and the cover beam can also support the work platform, cover beam and column to prevent the work platform from swinging as a whole. Specifically, the cantilevered platform may include several steel pipes 12 firmly connected to the horizontal aluminum alloy trusses 2 of the platform frame 1 close to the cover beam through fasteners, and a second steel springboard (not shown in the figure) laid and fixed on the steel pipes. draw).

In another embodiment, for the continuous erection of two-span operation platforms, steel pipes can also be used to connect the two operation platforms to form a whole, so as to further prevent the overall swing of the operation platforms.

In this embodiment, the amphibious light work platform also includes a safety guardrail 13 arranged around the amphibious light work platform, and a ladder 14 connecting the ground with the amphibious light work platform, or connecting the bridge deck with the amphibious two Use the climbing ladder 14 of light work platform. For example, steel pipes can be used to set up a ladder 14 to enter the platform from the side of the bridge, which is convenient for construction workers to go up and down and transfer construction tools and materials.

In this embodiment, the main structure of the amphibious light work platform is composed of an aluminum alloy truss and a steel springboard. Under the premise of meeting the construction load requirements, the platform's self-weight is reduced, the platform's working space is improved, and free assembly can be realized. It is suitable for different construction scenarios on land and in water areas, improving the efficiency of platform disassembly and transition, thereby reducing construction costs and speeding up construction progress. It is suitable for scenes with low loads such as bridge maintenance and reinforcement operations.

In this embodiment, the amphibious light work platform can be installed in the following steps:

1) The horizontal aluminum alloy truss 2 and the vertical aluminum alloy truss 3 are spliced into a platform frame 1, and a steel springboard is laid and fixed on the platform frame 1.

For the case where the construction work surface is located on the water, the platform frame 1 needs to be arranged with several detachable buoys 4 . The quantity and the buoyancy of the buoys 4 can be determined according to the dead weight of the platform frame 1.

2) Carry out lofting positioning and drilling of lifting point holes on the bridge, and then arrange the lifting system.

Consult the original bridge design drawings to understand the distribution of steel bars in the original structure. According to the design plan, fix the positions of the lifting points on the bridge deck for lofting and positioning. Hanging point holes are drilled on the beam flange.

The lifting system is composed of several mobile hoisting trolleys, and each mobile hoisting trolley is provided with a counterweight, a boom, and a hoist. Move the lifting trolley to the design position, add counterweight, power on for test machine and stand by.

3) Move the platform frame 1 after laying the steel springboard to the bottom of the bridge span, and use the lifting system to lift it to a preset height.

For the case where the construction work surface is located on the water, the main structure is hoisted into the water surface by a crane after being assembled on the shore, and then towed by a working boat to the position below the bridge span.

For rivers affected by the tide, the phenomenon of ebb and flow is relatively obvious. When the tide is high, the main structure can be dragged to the upstream of the bridge span by setting a traction rope on the bridge. The side piers are fixed.

The main structure of the lifting system should be lifted synchronously and smoothly as a whole. At the beginning of the lifting, the main structure should be lifted slowly, and the overall force of the main structure should be observed. After the main structure leaves the water surface, it should be leveled to ensure that the force of each lifting point is balanced, and then the overall uniform speed can be lifted. , stop lifting after reaching the preset height.

4), install the fixed lifting point, use the steel wire rope 5 as the spreader, the second end of the steel wire rope 5 passes through the hole of the lifting point and is lapped on the carrier 6, and the first end of the steel wire rope 5 bypasses the aluminum alloy corresponding to the preset lifting point Lock with shackle 11 behind the truss.

After the main structure is lifted to the preset height, the fixed lifting point can be installed. The second end of the steel wire rope 5 is passed through the hole of the lifting point and lapped on the carrier 6. Lock with shackle 11 behind the alloy truss. The contact position between the platform frame 1 and the steel wire rope 5 is provided with an arc-shaped steel plate.

5) After the fixed lifting point is installed, the lifting system slowly lowers the platform frame 1 after the steel springboard is laid, and the lifting system is removed after the load is completely transferred to the fixed lifting point.

6) Install safety guardrails 13 around the work platform, and install a ladder 14 connecting the ground and the work platform, or a ladder 14 connecting the bridge deck and the work platform.

In one embodiment, before the safety guardrail 13 is installed around the work platform, the installation method of the amphibious light work platform further includes:

Fasteners are used to firmly connect several steel pipes 12 to the horizontal aluminum alloy truss 2 close to the cover beam in the platform frame 1, and lay and fix a second steel springboard on the steel pipes to form a cantilevered platform. The cantilevered platform can reduce or eliminate the gap between the amphibious light work platform and the cover beam when the amphibious light work platform is in operation, and at the same time make the work platform form a support with the cover beam and the column to prevent The work platform swings as a whole.

It should be noted that for the embodiment of the installation method, for the sake of simple description, it is expressed as a series of action combinations, but those skilled in the art should know that the embodiment of the present invention is not limited by the described action sequence. Because according to the embodiment of the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

Claims (10)

1. An amphibious light work platform, characterized in that: it includes a platform frame, a steel springboard laid and fixed on the platform frame; the platform frame is spliced by horizontal aluminum alloy trusses and longitudinal aluminum alloy trusses; The platform frame is equipped with several detachable buoys, and the buoys are used to make the platform frame float on the water surface; the amphibious light work platform also includes a lifting point support structure, and the lifting point support structure includes several first ends and The steel wire ropes that are detachably connected to the preset lifting points of the platform frame, and the second ends of each steel wire rope can pass through the corresponding lifting point holes opened on the bridge and overlap on the bearing parts arranged on the bridge deck. 2. The amphibious light-duty work platform according to claim 1, characterized in that: the steel springboard is composed of several first steel springboards, and there are overlapping parts between adjacent first steel springboards, and the overlapping parts are locked by screws Tight and fixed with the platform frame by iron wire. 3. The amphibious light-duty work platform according to claim 1, characterized in that: the bearing member comprises two channel steels with notches facing away from each other, the second end of the wire rope is arranged with a lap joint, and the The bridging member is formed with two horizontal and opposite bearing parts, and each bearing part is overlapped on the corresponding channel steel. 4. The amphibious light work platform according to claim 3, wherein the wicker includes a handle for adjusting the position of the wicker. 5. The amphibious light work platform according to claim 1, characterized in that: it also includes a cantilevered platform, and the cantilever platform can reduce or eliminate the amphibious light work platform when it is in the working state. The gap between the work platform operation and the cover beam; the cantilevered platform includes a number of steel pipes firmly connected with the horizontal aluminum alloy truss in the platform frame close to the cover beam through fasteners, and the second steel pipe laid and fixed on the steel pipe steel gangway. 6. The amphibious light work platform according to claim 1, characterized in that: it also includes safety guardrails arranged around the amphibious light work platform, and a ladder connecting the ground and the amphibious light work platform, or connecting Ladders for bridge decks and amphibious light work platforms. 7. An installation method of the amphibious light work platform according to any one of claims 1 to 6, characterized in that it comprises: Splice the horizontal aluminum alloy trusses and vertical aluminum alloy trusses into a platform frame, and lay and fix steel springboards on the platform frame; Carry out lofting positioning and drilling of lifting point holes on the bridge, and then arrange a lifting system; the lifting system is composed of a number of mobile lifting trolleys, and each mobile lifting trolley is equipped with a counterweight, a boom, and a hoist; Move the platform frame after laying the steel springboard to the bottom of the bridge span, and use the lifting system to lift it to the preset height; Install a fixed lifting point and use a steel wire rope as a sling. The second end of the steel wire rope passes through the hole of the lifting point and overlaps the carrier. The first end of the steel wire rope bypasses the aluminum alloy truss corresponding to the preset lifting point and locks it with a shackle. ; After the fixed lifting point is installed, the hoisting system slowly lowers the platform frame after the steel springboard is laid, and the lifting system is removed after the load is completely transferred to the fixed lifting point; Install safety guardrails around the work platform, and install ladders connecting the ground and the work platform, or ladders connecting the bridge deck and the work platform. 8. The installation method of the amphibious light work platform according to claim 7, characterized in that: the contact position between the platform framework and the steel wire rope is provided with an arc-shaped steel plate. 9. The installation method of the amphibious light work platform according to claim 7, characterized in that: after removing the lifting system, further comprising: Fasteners are used to securely connect several steel pipes to the horizontal aluminum alloy truss close to the cover beam in the platform frame, and a second steel springboard is laid and fixed on the steel pipes to form a cantilevered platform; the cantilevered platform can reduce or eliminate amphibious use When the light work platform is in operation, the gap between the amphibious light work platform and the cover beam. 10. The installation method of the amphibious light work platform according to claim 7, characterized in that: after laying and fixing the steel springboard on the platform frame, further comprising: A number of detachable buoys are arranged on the platform frame, and the buoys are used to promote the platform frame to float on the water surface.

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