Supporting device for side span closure section of T-shaped beam bridge

Abstract

The utility model provides a T-structure beam bridge side span closure section supporting device, and belongs to the field of building construction. According to the technical scheme, the structure comprises a concrete strip-shaped foundation arranged below a cast-in-place linear section and a continuous beam closure section, a supporting assembly is arranged on the concrete strip-shaped foundation, a plurality of rows of steel pipe columns are arranged on the concrete strip-shaped foundation, and first reinforcing steel channels are welded between the adjacent steel pipe columns on the same side to serve as diagonal bracings for reinforcement; the top ends of the steel pipe columns on the same side are provided with double-spliced I-beams, the tops of the double-spliced I-beams are provided with supporting bottom dies, one sides of the supporting bottom dies abut against the bottoms of the cast-in-place linear sections, and the other sides of the supporting bottom dies seal the bottoms of the continuous beam closure sections. The structure has the advantages that the steel pipe column and a cast-in-place straight line section can be used as a stable structure, continuous beam cracking caused by unbalanced balance weight stress transmission during closure section pouring can be effectively prevented, meanwhile, the structure can be recycled, and cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of building construction, especially a T-structure beam bridge side span closure segment supporting device. BACKGROUND

[0002] Continuous beam bridge is a widely used bridge type, and closure segment construction is a key link in cantilever pouring continuous beam bridge construction, which relates the quality of the whole bridge, and counterweight is a key step in closure segment construction, but it is not valued by engineering technical personnel, and even is ignored, in order to solve the construction problem of continuous beam closure segment, the traditional T-structure continuous beam bridge must set counterweight in the poured continuous beam cantilever segment when closing the side span, so as to ensure that the elevation of the continuous beam cantilever segment meets the design requirement, prevent the cantilever segment from being disturbed, and keep the displacement and internal force of the beam unchanged;

[0003] But the traditional construction process is complicated, and it is necessary to frequently hoist the added or reduced counterweight block or the water amount in the added or reduced counterweight water tank, and the application range is small, so how to fully utilize the completed cast-in-place straight segment beam body as counterweight during closure segment construction becomes the key to solve the problem. UTILITY MODEL CONTENTS

[0004] The utility model discloses a kind of T-structure beam bridge side span closure segment supporting devices, which can effectively prevent continuous beam cracking caused by unevenness of counterweight stress transmission during closure segment pouring, and can be recycled, saving cost.

[0005] The utility model is realized through the following measures:

[0006] A T-structure beam bridge side span closure segment supporting device is characterized by comprising a concrete strip foundation arranged below a cast-in-place straight segment and a continuous beam closure segment, and a supporting assembly is arranged on the concrete strip foundation.

[0007] A plurality of rows of steel pipe columns are arranged on the concrete strip foundation, first reinforcing channel steels are welded between adjacent steel pipe columns on the same side as scissors to reinforce, double-spliced I-beams are arranged at the top of the steel pipe columns on the same side, a supporting bottom die is arranged at the top of the double-spliced I-beams, and the supporting bottom die is abutted against the bottom of the cast-in-place straight segment on one side and forms a closed bottom with the bottom of the continuous beam closure segment on the other side.

[0008] The utility model also has the following specific features:

[0009] A lower cover plate is pre-embedded in the concrete strip foundation, and the steel pipe columns are arranged on the lower cover plate.

[0010] Fourteen φ20mm round steels are arranged at the bottom of the lower cover plate, and the round steels are pre-embedded in the concrete strip foundation.

[0011] The steel pipe column and the lower cover plate are circumferentially fully welded, and after the circumferential welding is completed, the stiffening plate is welded, and the thickness of the stiffening plate is 1 cm.

[0012] The concrete strip foundation adopts C30 concrete.

[0013] A steel diagonal rod is arranged between the double-spliced I-shaped steel and the corresponding steel pipe column, and a second reinforcing channel steel is arranged between the steel diagonal rod, the double-spliced I-shaped steel and the steel pipe column.

[0014] The first reinforcing channel steel is a 16b channel steel, the steel diagonal rod is a 22b channel steel, the second reinforcing channel steel is a 14b channel steel, and the double-spliced I-shaped steel is a double-spliced I56a I-shaped steel.

[0015] The construction process comprises the following steps:

[0016] S1, concrete strip foundation construction: according to the calculation of the required size and reinforcement of the concrete strip foundation under the construction load, the original ground is excavated and the base is replaced and compacted before the foundation construction, the bearing capacity of the foundation after replacement and compaction is not less than 180Kpa, and the concrete strip foundation is constructed according to the calculation results on site;

[0017] S2, lower cover plate construction of steel pipe column: install the lower cover plate of the steel pipe column during the construction of the concrete strip foundation, embed the lower cover plate in the concrete strip foundation, and at the same time keep the top surface of the lower cover plate slightly higher than the concrete surface of the concrete strip foundation;

[0018] S3, steel pipe column installation construction: hoist the steel pipe column, align and position the steel pipe with the lower cover plate during installation, then weld the steel pipe with the lower cover plate, and weld the first reinforcing channel steel between adjacent steel pipes as a scissors support for connection;

[0019] The steel pipe column is installed, the weight, center of gravity and hoisting point position of the steel pipe are marked before hoisting, so as to hoist and install, the height of the steel pipe column to be installed is calculated in advance before installation, the existing size steel pipe column is reasonably combined, the axis drawn on the steel pipe column is accurately aligned with the axis on the lower cover plate, and the steel pipe and the lower cover plate are welded;

[0020] Preferably, the scissors support height of the steel pipe column is 2m, and the interval is 4m, and the arrangement position is arranged from 1.5m below the top of the steel pipe column;

[0021] S4, steel pipe column end support construction: the exposed port at the top end of the steel pipe column is continuously welded and closed with a steel plate as a closure plate, then steel diagonal rods are welded on both sides of the steel pipe column, and the second reinforcing channel steel is welded between the steel diagonal rods and the steel pipe column.

[0022] Because the upper end of the steel pipe column needs to place the falling frame device, the stress is concentrated here, the head plate is reinforced by using a 100*100*2cm steel plate, and the surrounding is welded with a stiffener plate;

[0023] S5, I-beam longitudinal distribution beam construction: install double-spliced I-beams on the top of the steel pipe column, and the double-spliced I-beams form a closure on the bottom of the continuous beam closure section;

[0024] Preferably, the double-spliced I-beams are connected by welding or through bolts;

[0025] S6, closure section construction: set up a formwork, complete the closure section concrete pouring construction, remove the formwork and the steel pipe column after the concrete is formed, and complete the closure section construction.

[0026] The utility model discloses the beneficial effects are: utilize steel pipe column and the already completed cast-in-place straight section can be stable structure, can effectively prevent the closure section pouring due to the unbalance of stress transmission of counterweight, causes continuous beam cracking, can be recycled simultaneously, saves the cost. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 It is the structure schematic diagram of the utility model.

[0028] Fig. 2 It is the structure schematic diagram of the utility model.

[0029] Fig. 3 It is the structure schematic diagram of the lower cover plate in the utility model.

[0030] Among them, the sign is: 1, the concrete strip foundation; 2, the lower cover plate; 3, the steel pipe column; 4, the first reinforcing channel steel; 5, the steel inclined rod; 6, the second reinforcing channel steel; 7, the double-spliced I-beam; 8, the closure section; 10, the round steel. DETAILED DESCRIPTION

[0031] In order to clearly illustrate the technical features of the scheme, the following through specific embodiments, the scheme is described.

[0032] Referring to Figs. 1-3 A T-shaped beam bridge side span closure section 8 supporting device, including being set in cast-in-place straight section, the concrete strip foundation 1 under continuous beam closure section 8, the concrete strip foundation 1 is provided with support assembly;

[0033] The concrete strip foundation 1 is provided with a plurality of rows of steel pipe columns 3, the first reinforcing channel steel 4 is welded as a scissors prop for reinforcement between the same side adjacent steel pipe columns 3, the double-spliced I-beam 7 is arranged at the top end of the same side steel pipe column 3, the double-spliced I-beam 7 is provided with a support base mould at the top, and the support base mould is abutted on the bottom of the cast-in-place straight section on one side and forms a closure on the bottom of the continuous beam closure section 8 on the other side.

[0034] The lower cover plate 2 is embedded in the concrete strip foundation 1, and the steel pipe column 3 is arranged on the lower cover plate 2.

[0035] The bottom of the lower cover plate 2 is provided with 14 round steels 10 with a diameter of 20 mm, which are embedded in the concrete strip foundation 1.

[0036] The steel pipe column 3 and the lower cover plate 2 are circumferentially fully welded, and after the circumferential welding is completed, the stiffener plate is welded, and the thickness of the stiffener plate is 1 cm.

[0037] The concrete strip foundation 1 adopts C30 concrete.

[0038] The steel inclined rod 5 is arranged between the double I-shaped steel 7 and the corresponding steel pipe column 3, and the second reinforcing channel steel 6 is arranged between the steel inclined rod 5, the double I-shaped steel 7 and the steel pipe column 3.

[0039] The first reinforcing channel steel 4 is a 16b channel steel, the steel inclined rod 5 is a 22b channel steel, the second reinforcing channel steel 6 is a 14b channel steel, and the double I-shaped steel 7 is a double I56a I-shaped steel.

[0040] The construction process comprises the following steps:

[0041] S1, concrete strip foundation 1 construction: according to the calculation of the required size and reinforcement of the concrete strip foundation 1 under the construction load, the original ground is excavated and the foundation is replaced and compacted before the foundation construction, the bearing capacity of the foundation after replacement and compaction is not less than 180Kpa, and the concrete strip foundation 1 is constructed according to the calculation results on site;

[0042] S2, steel pipe column 3 lower cover plate 2 construction: install the steel pipe column 3 lower cover plate 2 when the concrete strip foundation 1 is constructed, embed the lower cover plate 2 in the concrete strip foundation 1, and keep the top surface of the lower cover plate 2 slightly higher than the concrete surface of the concrete strip foundation 1;

[0043] S3, steel pipe column 3 installation construction: hoist the steel pipe column 3, align the steel pipe with the lower cover plate 2 during installation, then weld the steel pipe with the lower cover plate 2, and weld the first reinforcing channel steel 4 between adjacent steel pipes as a scissors support for connection;

[0044] The steel pipe column 3 is installed, the weight, center of gravity and hoisting point position of the steel pipe are marked before hoisting, so as to hoist and install, the height of the steel pipe column 3 to be installed is calculated in advance before installation, the existing size steel pipe column 3 is reasonably combined, the axis drawn on the steel pipe column 3 is accurately aligned with the axis on the lower cover plate 2, and the steel pipe and the lower cover plate 2 are welded;

[0045] Preferably, the scissors support height of the steel pipe column 3 is 2 m, and the interval is 4 m, and the arrangement position is arranged from 1.5 m below the top of the steel pipe column 3.

[0046] S4, steel pipe column 3 end support construction: steel pipe column 3 top exposed port adopts steel plate to make the end plate and carry out continuous welding and close, after that, steel pipe column 3 both sides weld steel inclined pole 5, steel inclined pole 5 and steel pipe column 3 weld second reinforcing channel steel 6;

[0047] Because steel pipe column 3 upper end needs to place drop frame device, this place stress concentration, end plate uses a 100x100x2cm steel plate to carry out strengthening, simultaneously weld stiffener around;

[0048] S5, I-beam longitudinal distribution beam construction: the double-pinned I-beam 7 is installed at the top of the steel pipe column 3, and the double-pinned I-beam 7 is closed at the bottom of the continuous beam closure section 8.

[0049] Preferably, the double-pinned I-beam 7 is connected by welding or bolt installation;

[0050] S6, closure section 8 construction: set up the formwork, complete the concrete pouring construction of closure section 8, remove the formwork and steel pipe column 3 after the concrete is formed, complete the construction of closure section 8.

[0051] The technical features not described in the utility model can be realized by or using the prior art, which will not be repeated here. Of course, the above description is not a limitation of the utility model, and the utility model is not limited to the above examples. Changes, modifications, additions or replacements made by ordinary skilled persons in the technical field within the essential scope of the utility model should also be within the protection scope of the utility model.

Claims

1. A T-girder bridge closure segment support device, characterized by, The concrete strip foundation is arranged below the cast-in-place straight section and the continuous beam closure section, and a support assembly is arranged on the concrete strip foundation; A plurality of rows of steel pipe columns are arranged on the concrete strip foundation, first reinforcing channel steels are welded between adjacent steel pipe columns on the same side as scissors to reinforce, double-spliced I-shaped steels are arranged at the top ends of the steel pipe columns on the same side, support base molds are arranged at the top of the double-spliced I-shaped steels, and the support base molds are abutted against the bottom of the cast-in-place straight section on one side and form a closed bottom for the continuous beam closure section on the other side.

2. The T-girder bridge closure segment support apparatus according to claim 1, wherein, A lower cover plate is embedded in the concrete strip foundation.

3. The T-girder bridge closure segment support apparatus according to claim 2, wherein, Fourteen φ20mm round steels are arranged at the bottom of the lower cover plate and are embedded in the concrete strip foundation.

4. The T-girder bridge closure segment support apparatus according to claim 3, wherein, The steel pipe column and the lower cover plate are circumferentially fully welded, and after circumferential welding, stiffening plate welding is performed, and the thickness of the stiffening plate is 1cm.

5. The T-girder bridge closure segment support apparatus according to claim 4, wherein, The concrete strip foundation is made of C30 concrete.

6. The T-girder bridge closure segment support apparatus according to claim 5, wherein, Steel diagonal rods are arranged between the double-spliced I-shaped steel and the corresponding steel pipe column, and second reinforcing channel steels are arranged between the steel diagonal rods, the double-spliced I-shaped steel and the steel pipe column. The first reinforcing channel steel is a 16b channel steel, the steel diagonal rod is a 22b channel steel, the second reinforcing channel steel is a 14b channel steel, and the double-spliced I-shaped steel is a double-spliced I56a I-shaped steel.

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