UHPC (Ultra High Performance Concrete) and profile steel combined structure for widening bridge

Abstract

The utility model discloses a UHPC (Ultra High Performance Concrete) and profile steel combined structure for widening a bridge. The UHPC and profile steel combined structure mainly comprises a T-shaped steel plate (1), a bolt A (2), a nut A (3), a bolt B (4), a nut B (5), angle steel (6), a lifting steel plate (7), a lower steel plate (8), an upper steel plate (9), shear nails (10), I-shaped steel (11), ribbed steel bars (12), UHPC (13) and a nut base plate (14). According to the combined structure, the UHPC and profile steel combined form is adopted, the structural rigidity is improved, force is transmitted to the web through the profile steel, the requirement for bearing capacity is met, meanwhile, the new bridge structure and the old bridge structure are mutually independent, and the situation that additional internal force is increased and bridge safety is affected due to differential settlement between the new bridge structure and the old bridge structure is avoided. The utility model has the characteristics that: (1) the structural rigidity is greatly improved by using the structural form of combining the UHPC and the I-shaped steel; (2) a supporting structure consisting of the T-shaped steel plate, the angle steel and the lifting steel plate can transfer the borne load to the web plate, so that the bearing capacity is greatly improved;

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bridge engineering, and particularly relates to a UHPC and sectional steel combined structure form for bridge widening. BACKGROUND

[0002] Bridge widening can not only be between two old bridges, but also between a new bridge and an old bridge, and is widely applied in the modern urbanization process, especially in the reconstruction of urban roads with heavy traffic. Through reasonable design and construction methods, bridge widening can not only meet the current traffic demand, but also prolong the service life of the bridge and reduce the maintenance cost. At present, most bridge widening adopts the upper structure connection form, and the settlement difference between the widened bridges may cause the increase of additional internal force, and then cracks are generated at the connection, and the bearing capacity is greatly affected because the widened part and the load borne thereby are not effectively transmitted, so the UHPC and sectional steel combined structure for bridge widening is needed. CONTENT OF THE UTILITY MODEL

[0003] The utility model relates to a UHPC and sectional steel combined structure form for bridge widening, and belongs to the technical field of bridge engineering. The combined structure uses the UHPC and sectional steel combined form, improves the structural rigidity, and transmits force to the web through the sectional steel, so that the bearing capacity requirement is met, and the new and old bridge structures are independent of each other, and the additional internal force is not increased due to the uneven settlement between the two, and the influence on the safety of the bridge is avoided.

[0004] To achieve the above object, the utility model adopts the following technical scheme: a UHPC and sectional steel combined structure for bridge widening, which mainly comprises a T-shaped steel plate, a bolt A, a nut A, a bolt B, a nut B, an angle steel, a lifting steel plate, a lower steel plate, an upper steel plate, a shear pin, an I-shaped steel, a ribbed steel bar, UHPC and a nut backing plate.

[0005] The UHPC and sectional steel combined structure for bridge widening is characterized in that the T-shaped steel plate is fixed to the web of the old bridge hollow plate, and the two are connected through the bolt A and the nut A, and are arranged at intervals of 1-1.5 m.

[0006] The UHPC and sectional steel combined structure for bridge widening is characterized in that the ribbed steel bar has a diameter of not less than 16 mm, needs to be arranged longitudinally and transversely to form a steel mesh, the transverse steel bar is planted in the old bridge hollow plate, the planting length is not less than 10 times the diameter, and the interval is 20-30 cm.

[0007] The UHPC and sectional steel combined structure for bridge widening is characterized in that the lower steel plate and the upper steel plate are connected with the old bridge hollow plate through the bolt A and the nut A, and the shear pins are welded on the inner sides of the lower steel plate and the upper steel plate at intervals of 20-30 cm.

[0008] The UHPC and profile steel combined structure for bridge widening, the lower steel plate is arranged in a longitudinal length, and is welded with the I-shaped steel, and the I-shaped steel plays a role of bearing when the UHPC is poured, and plays a role of stiff skeleton after the UHPC forms strength.

[0009] The UHPC and profile steel combined structure for bridge widening, the lower steel plate is arranged in a longitudinal length, and is welded with the I-shaped steel, and the I-shaped steel plays a role of bearing when the UHPC is poured, and plays a role of stiff skeleton after the UHPC forms strength.

[0010] The UHPC and profile steel combined structure for bridge widening, the lower steel plate is arranged in a longitudinal length, and is welded with the I-shaped steel, and the I-shaped steel plays a role of bearing when the UHPC is poured, and plays a role of stiff skeleton after the UHPC forms strength.

[0011] The UHPC and profile steel combined structure for bridge widening, the lower steel plate is arranged in a longitudinal length, and is welded with the I-shaped steel, and the I-shaped steel plays a role of bearing when the UHPC is poured, and plays a role of stiff skeleton after the UHPC forms strength.

[0012] The UHPC and profile steel combined structure for bridge widening, the lower steel plate is arranged in a longitudinal length, and is welded with the I-shaped steel, and the I-shaped steel plays a role of bearing when the UHPC is poured, and plays a role of stiff skeleton after the UHPC forms strength. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the support cross section of the combined structure.

[0014] Figure 2 It is the general cross section of the combined structure.

[0015] Figure 3 It is the plan view of the combined structure.

[0016] Figure 4 It is the local enlarged schematic view of A.

[0017] Figure 5 It is the local enlarged schematic view of B.

[0018] Figure 6 It is the local enlarged schematic view of C.

[0019] Figure 7 It is the local enlarged schematic view of D.

[0020] Figure 8 It is the three-dimensional view of the lifting steel plate 7.

[0021] Figure 9 It is the three-dimensional view of the T-shaped steel plate 1.

[0022] Figure 10 is a three-dimensional view of the lower steel plate 8.

[0023] Figure 11 is a three-dimensional view of the upper steel plate 9.

[0024] In the drawings, 1 is a T-shaped steel plate; 2 is a bolt A; 3 is a nut A; 4 is a bolt B; 5 is a nut B; 6 is an angle steel; 7 is a lifting steel plate; 8 is a lower steel plate; 9 is an upper steel plate; 10 is a shear nail; 11 is an I-beam; 12 is a ribbed steel bar; 13 is UHPC; 14 is a nut pad; 15 is an old bridge hollow slab; and 16 is a new bridge hollow slab. DETAILED DESCRIPTION

[0025] In order to have a deeper understanding of the technical features, purposes and effects of the utility model, the specific implementation mode of the utility model will be described with reference to the drawings.

[0026] Please refer to the drawings, in the utility model example, a UHPC and sectional steel combined structure for bridge widening, the combined structure is mainly composed of T-shaped steel plate 1, bolt A 2, nut A 3, bolt B 4, nut B 5, angle steel 6, lifting steel plate 7, lower steel plate 8, upper steel plate 9, shear nail 10, I-beam 11, ribbed steel bar 12, UHPC 13, nut pad 14.

[0027] Its specific implementation includes the following steps:

[0028] A T-shaped steel plate 1 is fixed on the web of the old bridge hollow slab 15, and the two are connected by bolt A and nut A, and are arranged every 1-1.5 m;

[0029] B the transverse ribbed steel bar 12 is planted in the old bridge hollow slab, and the planting length is not less than 10 times the diameter, the interval is 20-30 cm, and the longitudinal ribbed steel bar 12 is arranged, forming a steel bar net;

[0030] C I-beam 11 and shear nail 10 are welded on the inner side of the lower steel plate 8, and shear nail 10 is welded on the inner side of the upper steel plate 9;

[0031] D the bolt B 4, the nut B 5 are used to connect and fix the lower steel plate 8, the lifting steel plate 7 and the angle steel 6 on the T-shaped steel plate 1;

[0032] E the bolt A 2, the nut A 3 are used to tightly fix the lower steel plate 8, the upper steel plate 9 and the lifting steel plate 7 on the old bridge hollow slab 15, and then the lower steel plate 8 and the upper steel plate 9 are welded;

[0033] F UHPC 13 is poured along the opening of the upper steel plate 9, and after reaching the strength, bridge deck paving is carried out.

[0034] In the implementation process, the lower steel plate 8, the upper steel plate 9 and the I-shaped steel 11 not only serve as the formwork during UHPC pouring, but also serve as a part of the combined structure. The combined structure is simple and common in construction materials, and the structure is safe and reliable.

[0035] Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A UHPC and profile steel combined structure for bridge widening, mainly composed of T-shaped steel plate (1), bolt A (2), nut A (3), bolt B (4), nut B (5), angle steel (6), lifting steel plate (7), lower steel plate (8), upper steel plate (9), shear pin (10), I-beam (11), ribbed steel bar (12), UHPC (13), nut pad (14), characterized in that T-shaped steel plate (1) is fixed in the web of old bridge hollow slab (15), both of which are connected by bolt A (2) and nut A (3), and are arranged every 1-1.5m.

2. The UHPC and steel section combined structure for bridge widening according to claim 1, characterized in that, The lower steel plate (8) and the upper steel plate (9) are connected with the old bridge hollow slab (15) by bolt A (2) and nut A (3), and the shear studs are welded every 20-30cm inside the lower steel plate (8) and the upper steel plate (9).

3. The UHPC and steel section combined structure for bridge widening according to claim 1, characterized in that, Ribbed steel bars (12) with a diameter not less than 16mm are planted in the old bridge hollow slab (15), the length of the planted steel bars is not less than 10 times the diameter, the spacing is 20-30cm, and longitudinal ribbed steel bars (12) are also arranged, both of which form a steel bar mesh.

4. The UHPC and steel section combined structure for bridge widening according to claim 1, characterized in that, The lifting steel plate (7) is gradually changed into T-shaped pattern, which is connected with the old bridge hollow slab (15) by bolt A (2) and nut A (3), and is connected with the lower steel plate (8) and the I-shaped steel (11) by bolt B (4) and nut B (5).

5. The UHPC and steel section combined structure for bridge widening according to claim 1, characterized in that, The I-shaped steel (11) is arranged longitudinally and is welded with the lower steel plate (8).

6. The UHPC and steel section combined structure for bridge widening according to claim 1, characterized in that, The lifting steel plate (7) is arranged in alignment with the T-shaped steel plate (1), both of which transfer force through two angle steels (6).

Images