Overpass bridge construction supporting platform for flyover crossing ramps

Abstract

The utility model discloses a flyover crossing ramp overpass bridge construction supporting platform, which is characterized in that a stand column for supporting the platform to land is arranged in a space of a precast beam wet joint of an underramp bridge, the upper end of the stand column is higher than the top surface of a precast beam of the underramp bridge, and a longitudinal beam is arranged at the top of the stand column along the longitudinal bridge direction of an overpass cast-in-place box beam. Bailey beams serving as supporting surfaces of the supporting platform are connected and erected on the longitudinal beams in the transverse bridge direction of the overpass cast-in-place box beam. The flyover crossing ramp overpass bridge construction supporting platform is ingenious in structural arrangement, and after a precast beam of an underramp bridge is erected, the requirement for erecting an overpass cast-in-place box beam support can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of road and bridge construction, in particular to a three-dimensional crossing ramp overpass bridge construction support platform. BACKGROUND

[0002] As a modern highway rapid transport channel, the highway plays an important role in today's social economy. As an important hub in the road network, the highway interchanges optimize the regional road network and positively promote the logistics, resource development, investment attraction, industrial structure adjustment and horizontal economic cooperation along the line. With the development of three-dimensional traffic, in the construction of highways, the problem of the intersection of two ramps will occur. How to scientifically organize the construction of the interchange project while ensuring construction safety and progress is the key to the construction of the interchange hub.

[0003] Although the prefabricated steel box girder has the advantages of fast construction and low construction cost and is widely used, in the actual application and construction process, due to the factors of topography and design, not all ramp bridges are suitable for prefabricated steel box girder erection. When the ramp interchanges intersect, considering the comprehensive cost, design difficulty and other factors, the overpass ramp bridge uses cast-in-place box girder, and the underpass ramp bridge uses prefabricated girder, which is the optimal design and construction. However, the clearance of the upper and lower ramp bridge intersection part is only about 6 meters. If the upper part of the cast-in-place bridge is constructed first, the clearance of the lower part of the girder cannot meet the requirements. The construction sequence needs to be adjusted, and the lower ramp bridge is constructed first, and then the lower ramp bridge is constructed, which can solve the above problems, but brings new problems: how to erect the support of the upper ramp bridge, part of the support of the upper ramp bridge falls in the prefabricated girder area, and part of the support falls to the ground. During the construction process, uneven settlement will occur in the two parts. Therefore, a support platform is needed to erect the prefabricated girder of the lower ramp bridge and meet the erection of the support of the overpass cast-in-place box girder. SUMMARY

[0004] The utility model aims at the problems existing in the prior art, and provides a three-dimensional crossing ramp overpass bridge construction support platform, which can meet the erection of the support of the overpass cast-in-place box girder after the prefabricated girder of the lower ramp bridge is erected.

[0005] The utility model is implemented by adopting the following technical solutions:

[0006] The application discloses a construction support platform for a ramp of a three-dimensional intersection overpass bridge, and utilizes the space of a wet joint of a prefabricated beam of a lower ramp bridge to set up a column for the landing of the support platform, the upper end of the column is set to be higher than the top surface of the prefabricated beam of the lower ramp bridge, a longitudinal beam is arranged on the top of the column along the longitudinal direction of a cast-in-situ box beam of the overpass bridge, and a Bailey beam serving as a support surface of the support platform is arranged on the longitudinal beam along the transverse direction of the cast-in-situ box beam of the overpass bridge. The Bailey beam is assembled by a Bailey piece, a support frame and a pin. Since part of the columns needs to pass through the wet joint, the verticality and the plane position of the pipe pile should be strictly controlled during the pipe pile construction, the verticality should be less than 1%, and the plane position can be adjusted when the plane position coincides with the prefabricated beam and the pier column structure.

[0007] Further preferably, the Bailey beam is arranged with a distribution beam along the longitudinal direction of the cast-in-situ box beam of the overpass bridge, the distribution beam is made of an I-shaped steel, and a disc fastener support is arranged on the distribution beam.

[0008] Further preferably, a plurality of transverse connections are arranged between every two adjacent columns, and an inclined bracing rod is arranged between two adjacent transverse connections. The transverse connection and the inclined bracing rod are made of a channel steel.

[0009] Further preferably, the column is made of a spiral pipe. A base plate placing groove is arranged at the top of the column, a support base plate is horizontally arranged at the bottom of the base plate placing groove, a triangular plate bracket is arranged at the bottom of the support base plate, the triangular plate bracket is welded to the column, and the longitudinal beam is supported on the support base plate.

[0010] The construction support platform for the ramp of the three-dimensional intersection overpass bridge is arranged by utilizing the space of the wet joint after the prefabricated beam of the ramp bridge is erected by the bridge erecting machine and the welding and positioning of the wet joint of the full-width prefabricated beam are completed, specifically, a plurality of columns are arranged along the longitudinal direction of the cast-in-situ box beam of the overpass bridge to form three columns of support columns, the columns at the prefabricated beam of the lower ramp bridge all pass through the wet joint of the prefabricated beam of the lower ramp bridge at the corresponding position. , solve the uniformity of the support foundation, unified as floor stand Figure 1 The upper end of the column is arranged to be higher than the top surface of the prefabricated beam of the lower ramp bridge, a longitudinal beam is arranged at the top of each column, and a Bailey beam serving as a support surface is arranged on the three longitudinal beams along the transverse direction of the cast-in-situ box beam of the overpass bridge to form a support platform. The Bailey beam is arranged with a distribution beam along the longitudinal direction of the cast-in-situ box beam of the overpass bridge, the distribution beam is made of an I-shaped steel, and a disc fastener support is arranged on the distribution beam, so that the support of the cast-in-situ box beam of the overpass bridge can be achieved after the prefabricated beam of the lower ramp bridge is erected. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 2 is a layout top view diagram of the construction support platform of the ramp overpass bridge;

[0012] Figure 3 is a layout top view diagram of the column and the longitudinal beam;

[0013] Figure 4 is a layout end view diagram of the construction support platform of the ramp overpass bridge;

[0014] Figure 5 is a layout top view diagram of the column;

[0015] Figure 4 is a layout top view diagram of Figure 6 ;

[0016] Figure 4 is a layout left view diagram of ​ ;

[0017] The name corresponding to the serial number in the figure is:

[0018] 1, column, 2, longitudinal beam, 3, Bailey beam, 4, precast beam wet joint of the ramp bridge, 5, cross link, 6, inclined bracing rod, 7, distribution beam, 8, disc buckle support, 9, triangular plate bracket, 10, support pad, 11, pad placement groove. DETAILED DESCRIPTION

[0019] The technical solutions in the application will be clearly and completely described below in conjunction with the embodiments, and the described embodiments are only a part of the embodiments of the application, rather than all the embodiments. EMBODIMENT

[0020] A construction support platform of a ramp overpass bridge is provided, which comprises a column 1 arranged in space by using a precast beam wet joint of a ramp bridge, and a longitudinal beam 2 arranged on the top of the column 1 along the longitudinal direction of the overpass cast-in-place box girder, and a Bailey beam 3 arranged on the longitudinal beam 2 along the transverse direction of the overpass cast-in-place box girder as a support surface of the support platform.

[0021] The column 1 is arranged in three columns along the longitudinal direction of the overpass cast-in-place box girder, and the column 1 at the precast beam of the ramp bridge passes through the precast beam wet joint 4 of the corresponding position of the ramp bridge, and the top of each column 1 is provided with a longitudinal beam 2, and the longitudinal beam 2 is made of an I-beam. The distribution beam 7 is arranged on the Bailey beam 3 along the longitudinal direction of the overpass cast-in-place box girder, and the distribution beam 7 is made of an I-beam, and the disc buckle support 8 for supporting the overpass cast-in-place box girder is arranged on the distribution beam 7.

[0022] The plurality of columns 1 are connected with a plurality of cross links 5 at intervals between every two adjacent columns 1, and the adjacent two cross links 5 are connected with the inclined bracing rods 6. The cross links 5 and the inclined bracing rods 6 are made of channel steel.

[0023] The column 1 is made of spiral pipe.

[0024] The top of the column 1 is provided with a pad placing groove 11, the bottom of the pad placing groove 11 horizontally places a supporting pad 10, the bottom of the supporting pad 10 is connected and supported with a triangular plate corbel 9, the triangular plate corbel 9 is welded with the column 1, and the longitudinal beam 2 is supported on the supporting pad 10.

[0025] The column 1 is made of 529x8mm spiral steel pipe, and the splicing of the pipe pile must ensure that the strength of the splicing position is not less than that of the base material column; the longitudinal beam 2 is made of i56a I-shaped steel, the joint of the longitudinal beam 2 is spliced and welded with a 10mm thick steel plate cover plate, the upper main cross beam of the longitudinal beam 2 is made of a Bailey beam 3; the Bailey beam 3 is made of a 16Mn standard type 1.5x3m Bailey piece; the pin material of the Bailey piece truss is 30CrMnTi, the diameter is 49.5mm, and the length is 20cm; the size of the support frame is 90cmx1.18m; the bolt specification is M36x180mm; the 16 channel steel is longitudinally and transversely connected between the columns 1 to increase the overall stability; the top of the column 1 is welded with a steel plate to form a corbel structure. The DZ-90 vibration hammer is used for construction, when it is impossible to obviously sink, if the sinking is less than or equal to 1cm within 1 minute of continuous vibration and pressure, and there is no change after repeating 2-3 times, it is considered that the bearing capacity requirement is reached.

[0026] The above description is not a limitation of the utility model, the utility model is not limited to the above examples, and the changes, modifications, additions or replacements made by the ordinary skilled in the art within the essential scope of the utility model should belong to the protection scope of the utility model.

Claims

1. A flyover ramp overpass bridge construction support platform, characterized in that: The space of the wet joint of the prefabricated beam of the lower ramp bridge is used to set a column (1) of the supporting platform landing, the upper end of the column (1) is set higher than the top surface of the prefabricated beam of the lower ramp bridge, a longitudinal beam (2) is arranged on the top of the column (1) along the longitudinal direction of the upper cast-in-place box beam, and a Bailey beam (3) is arranged on the longitudinal beam (2) along the transverse direction of the upper cast-in-place box beam and is used as a supporting surface of the supporting platform.

2. The ramp overpass bridge construction support platform of claim 1, wherein: The column (1) is arranged in three columns along the longitudinal direction of the upper cast-in-place box beam, and the columns (1) at the prefabricated beam of the lower ramp bridge all pass through the wet joint (4) of the prefabricated beam of the lower ramp bridge from the corresponding positions.

3. The ramp overpass bridge construction support platform of claim 1, wherein: The Bailey beam (3) is arranged with a distribution beam (7) along the longitudinal direction of the upper cast-in-place box beam, and a disc buckle support (8) for supporting the upper cast-in-place box beam is arranged on the distribution beam (7).

4. The ramp overpass bridge construction support platform of claim 1, wherein: A plurality of cross links (5) are arranged between every two adjacent columns (1), and an inclined bracing rod (6) is arranged between two adjacent cross links (5).

5. The construction support platform for a ramp overpass bridge at a grade separation according to claim 1 or 4, characterized in that: The column (1) is made of a spiral pipe.

6. The ramp overpass bridge construction support platform of claim 5, wherein: A base plate placing groove (11) is arranged on the top of the column (1), a supporting base plate (10) is horizontally arranged at the bottom of the base plate placing groove (11), a triangular plate corbel (9) is arranged at the bottom of the supporting base plate (10) and is connected and supported, and the triangular plate corbel (9) is welded with the column (1); and the longitudinal beam (2) is supported on the supporting base plate (10).

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