CN214575522U - Cantilever type construction platform for high-altitude construction - Google Patents
Cantilever type construction platform for high-altitude construction Download PDFInfo
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- CN214575522U CN214575522U CN202022759377.9U CN202022759377U CN214575522U CN 214575522 U CN214575522 U CN 214575522U CN 202022759377 U CN202022759377 U CN 202022759377U CN 214575522 U CN214575522 U CN 214575522U
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Abstract
The utility model relates to a cantilever type construction platform for high altitude construction, construction platform erects on two trusses, and construction platform includes: one end of the length direction of the upper surface of each supporting beam is arranged on the bottom surfaces of the two trusses, the other end of each supporting beam extends to the outer sides of the two trusses, and a supporting platform is formed on the upper surfaces of the supporting beams positioned on the outer sides of the two trusses; the plurality of groups of reinforcing brackets comprise at least two reinforcing rods which are arranged below the supporting beam, one ends of the two reinforcing rods are connected, and the other ends of the two reinforcing rods are respectively connected with the bottom surface of the supporting beam to form a triangular structure; a plurality of safety poles, vertical setting in a supporting beam upper surface, a plurality of ties up and tie up the hole on safety pole surface has been seted up, ties up and tie up downthehole tie up and have tied up the safety rope. The construction platform is simple and reliable in overall structure, easy to install and dismantle, high in working efficiency, safe, reliable, low in cost, short in construction period and not prone to being influenced by external factors, and has high popularization value.
Description
Technical Field
The utility model belongs to the technical field of the high altitude construction, concretely relates to cantilever type construction platform for high altitude construction.
Background
On the premise that the demand for heat supply area is increased, the existing first station and the steam pipe network need to be modified. The main content of the reconstruction is that the original DN700 heat supply pipeline is completely dismantled, and the diameter is expanded to DN 900.
In the heat supply pipeline construction process, the current river section overhead pipeline with the highest difficulty and the highest danger belongs to. The length of the section of pipeline is 320 meters, the distance between the pipeline and the river bottom is 12 meters, the distance between the pipeline and the edge of the bridge is 30 meters, and the distance between the pipeline and the buttress is 20 meters, belonging to high-altitude operation and relating to a plurality of operations such as personnel climbing welding, detection, heat preservation installation, pipeline hoisting and the like.
The difficulties faced in construction are as follows:
constructors need to set up a scaffold on a river channel during high-altitude operation, a bearing upright rod of the scaffold is directly erected on a river bed, the geological condition of the bottom of the river bed is complex, gravel is easy to wash away, and flowing river water can increase the lateral thrust on a frame body, so that the frame body is easy to destabilize and collapse;
and the construction period of the river crossing section reaches more than 40 days, the scaffold floor sweeping rod and part of the connecting fasteners at important parts can be soaked in seawater for a long time, and the phenomenon that the fasteners fall off due to corrosion is easily caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cantilever type construction platform for high altitude construction to solve the current big problem of the high altitude construction degree of difficulty of river course.
In order to realize the purpose, the utility model provides a cantilever type construction platform for high altitude construction, construction platform is the initiative in the installation of large-span river course pipeline, and overall structure is simple reliable, easily installs and demolishs, has improved work efficiency, has reached safe and reliable, with low costs, the time limit for a project weak point, be difficult for receiving the purpose that external factors influenced, to at present under the big background of big dynamics implementation concentrated steam supply heating, adopt construction platform's construction method has great spreading value.
Specifically, the utility model discloses a technical scheme be:
the utility model provides a cantilever type construction platform for high altitude construction, construction platform erects on two trusss, two the truss is arranged on a plurality of buttress along buttress upper surface length direction parallel interval, construction platform includes: the supporting beams are horizontally arranged, the length direction of the supporting beams is perpendicular to the length direction of the trusses, one end of the supporting beams in the length direction of the upper surface is arranged on the bottom surfaces of the two trusses, the other end of the supporting beams in the length direction of the upper surface extends to the outer sides of the two trusses, the supporting beams are arranged in parallel at intervals along the length direction of the trusses, and the upper surfaces of the supporting beams positioned on the outer sides of the two trusses form a supporting platform for construction workers to stand; the supporting beam corresponds to one group of reinforcing supports, each reinforcing support comprises at least two reinforcing rods, one end of each reinforcing rod is connected, the other end of each reinforcing rod is connected with the two ends of the bottom surface of each supporting beam in the length direction, and the two reinforcing rods and the supporting beams are matched to form a triangular structure; a plurality of safety pole, a supporting beam correspond a safety pole, safety pole is vertical to be set up and to keep away from two in a supporting beam upper surface length direction truss one end, every the safety pole surface has been seted up a plurality of ties and has been tied up the hole, ties up and tie up downthehole the safety rope that has tied up.
Further, the cross section of the truss is in an I shape; a reinforcing plate is arranged on the upper surface of the supporting beam on the outer side of the bottom surface of the truss close to one end of the safety rod, one truss corresponds to one reinforcing plate, and two reinforcing plates are arranged on each supporting beam; the reinforcing plate comprises a vertical plate and a transverse plate connected to the upper end of the vertical plate, and the transverse plate and the vertical plate are matched to form an inverted L-shaped structure; the reinforcing plate passes through riser and a supporting beam upper surface connection, the diaphragm of reinforcing plate extends to the truss bottom surface and is close to safety bar one end top.
Further, each set of the reinforcing brackets comprises three reinforcing rods; one ends of the three reinforcing rods are respectively connected, and the other ends of the three reinforcing rods are respectively connected with the bottom surface of the supporting beam; any two reinforcing rods are matched with the supporting beam to form a triangular structure.
Furthermore, a steel springboard is laid on the upper surface of the supporting platform.
Further, a safety net is arranged below the supporting platform.
Furthermore, the number of the binding holes on the safety rod is three, and each row is provided with at least one binding hole; the binding hole is formed in the middle of the safety rod in the length direction; the three rows of binding holes are arranged at intervals along the width direction of the safety rod.
Further, the support beam is I-shaped steel.
The beneficial effects of the utility model reside in that:
adopt cantilever type construction platform to carry out the installation of the section of river overhead pipeline of crossing of big span, the first problem of solution is exactly can't set up the scaffold frame in the river course: the frame body is easy to collapse and the connection fastener at the important part falls off due to corrosion.
The cantilever type construction platform is low in cost, and only general section steel is used for welding and assembling.
Cantilever type construction platform's installation and dismantlement are simple and convenient, during the installation direct welding to former piping lane the truss on can, can directly cut off during the dismantlement, and it is extremely convenient to operate.
The cantilever type construction platform forms a construction channel beside the truss, so that continuous construction can be realized without being influenced by external factors, and the construction period can be greatly shortened on the premise of ensuring the construction quality.
Drawings
Fig. 1 is a schematic structural view of a cantilever type construction platform for high-altitude construction provided in embodiment 1 of the present invention;
fig. 2 is a schematic structural view of the cantilever type construction platform and truss for high altitude construction provided in embodiment 1 of the present invention;
FIG. 3 is a top view of FIG. 2;
the device comprises a support beam 1, a support beam 10 and a support platform;
2. a reinforcing bracket 21, a reinforcing rod;
3. a safety rod 31, a binding hole 32 and a safety rope;
4. reinforcing plates 41, vertical plates 42 and transverse plates;
100. a truss.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any modification of the structure, change of the ratio relation or adjustment of the size should fall within the scope of the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", and the like used in the present specification are for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.
Example 1
Referring to fig. 1-3, the utility model provides a cantilever type construction platform for high altitude construction, construction platform erects on two trusses 100, two truss 100 arranges on a plurality of buttresses along the parallel interval of buttress upper surface length direction, construction platform includes: the supporting beams 1 are horizontally arranged, the length direction of each supporting beam 1 is perpendicular to the length direction of the trusses 100, one end of each supporting beam 1 in the length direction of the upper surface is arranged on the bottom surfaces of the two trusses 100, the other end of each supporting beam 1 in the length direction of the upper surface extends to the outer sides of the two trusses 100, the supporting beams 1 are arranged in parallel along the length direction of the trusses 100 at intervals, and supporting platforms 10 for construction personnel to stand are formed on the upper surfaces of the supporting beams 1 positioned on the outer sides of the two trusses 100; the supporting beam 1 corresponds to one group of reinforcing supports 2, each reinforcing support 2 comprises at least two reinforcing rods 21, the two reinforcing rods 21 are arranged below the supporting beam 1, one ends of the two reinforcing rods 21 are connected, the other ends of the two reinforcing rods 21 are respectively connected with two ends of the bottom surface of the supporting beam 1 in the length direction, and the two reinforcing rods 21 and the supporting beam 1 are matched to form a triangular structure; a plurality of safety pole 3, a supporting beam 1 corresponds a safety pole 3, safety pole 3 is vertical to be set up and to keep away from two in a supporting beam 1 upper surface length direction truss 100 one end, every safety pole 3 the surface has been seted up a plurality of ties and has been tied up hole 31, ties and ties up and tie up in the hole 31 and tie up and have tied up safety rope 32.
Further, the cross-sectional shape of the truss 100 is an i-shape; the upper surfaces of the supporting beams 1, which are close to the outer side of one end of the safety rod 3, on the bottom surfaces of the trusses 100 are provided with reinforcing plates 4, one truss 100 corresponds to one reinforcing plate 4, and each supporting beam 1 is provided with two reinforcing plates 4; the reinforcing plate 4 comprises a vertical plate 41 and a transverse plate 42 connected to the upper end of the vertical plate 41, and the transverse plate 42 and the vertical plate 41 are matched to form an inverted L-shaped structure; the reinforcing plate 4 is connected to the upper surface of the support beam 1 through the vertical plate 41, and the horizontal plate 42 of the reinforcing plate 4 extends to the bottom of the truss 100 above the end close to the safety bar 3.
The design of the reinforcing plate 4 can reinforce the assembly between the supporting beam 1 and the truss 100, and ensure the overall stability of the construction platform.
Further, each group of said reinforcing brackets 2 comprises three reinforcing rods 21; one ends of the three reinforcing rods 21 are respectively connected, and the other ends of the three reinforcing rods 21 are respectively connected with the bottom surface of the supporting beam 1; any two reinforcing rods 21 are matched with the supporting beam 1 to form a triangular structure.
The three reinforcing rods 21 and the supporting beams 1 are matched, so that the stability of a cantilever type construction platform formed by matching a plurality of supporting beams 1 can be enhanced, and the construction safety is ensured.
Further, a steel gangboard (not shown) is laid on the upper surface of the support platform 10.
The laying of steel springboard makes things convenient for workman's walking, increases stability, promotes the security.
Further, a safety net (not shown) is disposed below the support platform 10.
The safety net is designed to be matched with the supporting platform 10 to form double-layer protection, and construction safety is guaranteed.
Further, the support beam 1 is an i-steel.
In order to solve the problem of building a scaffold, a cantilever type construction platform is designed by means of a truss structure at the lower part of an original 377 pipeline (the original truss is formed by welding and combining two rows of H-shaped steel, the center distance of two trusses 100 is 1000mm, and the 377 pipeline is located on a middle steel frame of the two trusses 100).
The cantilever type construction platform consists of 96 reinforcing supports, and each reinforcing support is formed by welding and combining a supporting beam 1(# 10I-steel) with the length of 3350mm serving as a main body structure, 3 reinforcing rods 21(50 x 5 angle steel) with the lengths of 1453mm, 1290mm and 820mm and two reinforcing plates 4(50 x 5 angle steel) serving as auxiliary rib plates.
The stress of each steel structure on the reinforcing frame is calculated as follows:
the three reinforcing rods 21 are respectively a reinforcing rod a, a reinforcing rod B and a reinforcing rod c, and the connecting point of the reinforcing rod c and the supporting beam 1 is a point B at the connecting end of the three reinforcing rods 21.
Angle steel a: bearing pressure, calculating the stability of the compression bar
Length L1290 mm, radius of gyration i 9.8mm, length ratio lambda L/i 130
According to steel construction standard 7.6.1, the reduction factor η is 0.6+0.0015 λ is 0.795
N/eta psi Af is less than or equal to 1.0
According to table 7.2.1-1, it can be found that the equilateral angles belong to the section class a, and psi can be found to be 0.434 according to appendix D;
N≤ηψAf＝0.795*0.434*48*215＝35KN；
angle steel b: bearing pressure and calculating the stability of the compression bar;
length L1453 mm, radius of gyration i 9.8mm, length ratio lambda L/i 148;
according to steel structure standard 7.6.1, the reduction factor η is 0.6+0.0015 λ is 0.822;
n/eta psi Af is less than or equal to 1.0, and N is less than or equal to eta psi Af;
according to table 7.2.1-1, it can be found that the equilateral angles belong to the section class a, and psi can be found to be 0.434 according to appendix D;
N≤ηψAf＝0.822*0.434*48*215＝29KN；
angle steel c: bearing the tensile force, and calculating the stability of the pull rod;
according to steel structure standard 7.1.1, δ N/a ≦ f, N ≦ Af 480 ═ 215N ≦ 103KN
Performing stress analysis on the point A, wherein component forces of pressure applied to the angle steel a and the angle steel b in the horizontal direction are respectively 35KN cos39 degrees to 27.2KN and 29KN cos34 degrees to 24KN, so that the angle steel b bears a small horizontal force in the horizontal direction; the resultant force of the angle steel a and the angle steel b in the vertical direction is as follows:
the combined force of the angle steel a and the angle steel b bears small vertical force because the combined force of 35KN, 39 degrees, 29KN, sin, 34 degrees, 22.03KN +16.21KN, 38.24 KN.
And (4) performing stress analysis on the point B, and when a vertical force F is applied, balancing the component force of the reaction force of the pressure borne by the angle steel B in the vertical direction with the component force, wherein F is less than or equal to 29 sin34 and 16.21 KN.
Considering the most unfavorable case that all the weight is concentrated to the outermost end of the support beam 1, which is located at a distance of 800mm from the point B, according to the deflection formula:
FL3/3EIx≤L/200(E＝2.06*10^5N/mm2) And bending moment formula fWx ═ 1.3FL, we can find:
F≤3EIx/200L2＝3*2.06*10^5*245*10^4/(200*800*800)＝11.8KN；
F≤fWx/1.3L＝215*49*103/(1.3*800)＝10.1KN；
in summary, a single span can withstand a load of at most 10.1KN, i.e. a weight of 1t, per four meter interval. During construction such as installation, detection and heat preservation, the single span needs 4 people to install simultaneously at most, calculates according to individual 100KG, plus temporary materials and instruments such as heat preservation iron sheet and heat preservation, and this design can satisfy the construction needs completely.
The utility model provides a cantilever type construction platform's application method for high altitude construction as follows:
two reinforcing plates 4 with the thickness of 10mm are welded at the position shown by the end of a supporting beam 1, the distance between the two reinforcing plates 4 is 1000mm, the two reinforcing plates are dragged to the lower flange plates of the two rows of original trusses 100 by a hoisting rope to be close to one side of a pipeline to be constructed, the two sides of each reinforcing plate 4 are fully welded, a safety rod 3 is welded at the other side of the supporting beam 1, the height of each safety rod 3 is about 1.5 m, three rows of binding holes 31 are formed in the middle of each safety rod 3, and the safety rods are tightly bound after being threaded with safety ropes 32 and used as the safety ropes. Welding a reinforcing bracket every three meters on the truss 100 of 320 meters of the whole river channel, paving a steel springboard on the welded supporting platform 10, and firmly binding the steel springboard after the steel springboard is spot-welded on the supporting platform 10. After the whole platform is formed, a safety net is pulled on the lower portion of the platform, and the whole cantilever type construction platform is formed.
The utility model discloses a cantilever type construction platform can realize the installation and the maintenance work of large-span, long distance overhead pipeline, has safe and reliable, low cost, receives external environment factor to influence little huge advantage. The cantilever type construction platform is high in applicability, the type and the size of the I-shaped steel can be adjusted according to the actual field, and the cantilever type construction platform is suitable for construction of most of pipelines with H-shaped steel trusses.
Example 2
The number of the binding holes 31 on the safety rod 3 is three, and each row is provided with at least one binding hole 31; the binding hole 31 is arranged in the middle of the safety rod 3 in the length direction; the three rows of binding holes 31 are arranged at intervals along the width direction of the safety bar 3.
The number of binding holes 31 is increased, the number of safety ropes 32 is correspondingly increased, and safety is improved.
The rest is the same as example 1.
Although the present invention has been described in detail with reference to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made to the invention or a functional block can be deleted. Therefore, such modifications or improvements or deletions made without departing from the spirit of the invention are intended to be within the scope of the invention.
Claims (7)
1. The utility model provides a cantilever type construction platform for high altitude construction, construction platform erects on two trusss (100), two truss (100) are arranged on a plurality of buttress along buttress upper surface length direction parallel interval, its characterized in that, construction platform includes:
the supporting beams (1) are horizontally arranged, the length direction of each supporting beam (1) is perpendicular to the length direction of the trusses (100), one end of the length direction of the upper surface of each supporting beam (1) is arranged on the bottom surfaces of the two trusses (100), the other end of the length direction of the upper surface of each supporting beam (1) extends to the outer sides of the two trusses (100), the supporting beams (1) are arranged in parallel along the length direction of the trusses (100) at intervals, and the upper surfaces of the supporting beams (1) positioned on the outer sides of the two trusses (100) form a supporting platform (10) for construction workers to stand;
the supporting beam (1) corresponds to one group of reinforcing supports (2), each reinforcing support (2) comprises at least two reinforcing rods (21), the two reinforcing rods (21) are arranged below the supporting beam (1), one ends of the two reinforcing rods (21) are connected, the other ends of the two reinforcing rods (21) are respectively connected with two ends of the bottom surface of the supporting beam (1) in the length direction, and the two reinforcing rods (21) are matched with the supporting beam (1) to form a triangular structure;
a plurality of safety pole (3), a supporting beam (1) correspond a safety pole (3), safety pole (3) are vertical to be set up and to keep away from two in a supporting beam (1) upper surface length direction truss (100) one end, every safety pole (3) surface has been seted up a plurality of ties and has been tied up and tie up hole (31), ties up and tie up in tying up hole (31) and tie up and have tied up safety rope (32).
2. The cantilever-type construction platform for high altitude construction according to claim 1, wherein the truss (100) has a cross-sectional shape of an i-shape;
a reinforcing plate (4) is arranged on the upper surface of the supporting beam (1) on the outer side of one end, close to the safety rod (3), of the bottom surface of the truss (100), one truss (100) corresponds to one reinforcing plate (4), and two reinforcing plates (4) are arranged on each supporting beam (1);
the reinforcing plate (4) comprises a vertical plate (41) and a transverse plate (42) connected to the upper end of the vertical plate (41), and the transverse plate (42) and the vertical plate (41) are matched to form an inverted L-shaped structure;
the reinforcing plate (4) is connected with the upper surface of the supporting beam (1) through a vertical plate (41), and a transverse plate (42) of the reinforcing plate (4) extends to the upper portion of one end, close to the safety rod (3), of the bottom surface of the truss (100).
3. The cantilevered construction platform for high altitude construction according to claim 1, characterized in that each group of said reinforcing brackets (2) comprises three reinforcing bars (21);
one ends of the three reinforcing rods (21) are respectively connected, and the other ends of the three reinforcing rods (21) are respectively connected with the bottom surface of the supporting beam (1);
any two reinforcing rods (21) are matched with the supporting beam (1) to form a triangular structure.
4. The cantilever-type construction platform for high altitude construction according to claim 1, wherein the upper surface of the support platform (10) is paved with a steel gangboard.
5. The cantilevered construction platform for high altitude construction according to claim 1 or 4 wherein a safety net is provided under the support platform (10).
6. The cantilever-type construction platform for high altitude construction according to claim 1, wherein the number of the tie-up holes (31) on the safety bar (3) is three rows, each row having at least one tie-up hole (31);
the binding hole (31) is arranged in the middle of the safety rod (3) in the length direction;
the three rows of binding holes (31) are arranged at intervals along the width direction of the safety rod (3).
7. The cantilever-type construction platform for high altitude construction according to claim 1, 2 or 3, characterized in that the support beam (1) is I-steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022759377.9U CN214575522U (en) | 2020-11-25 | 2020-11-25 | Cantilever type construction platform for high-altitude construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022759377.9U CN214575522U (en) | 2020-11-25 | 2020-11-25 | Cantilever type construction platform for high-altitude construction |
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| CN202022759377.9U Active CN214575522U (en) | 2020-11-25 | 2020-11-25 | Cantilever type construction platform for high-altitude construction |
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