CN204185755U - A kind of Wavelike steel webplate post-stressed concrete T beam - Google Patents

Abstract

The utility model discloses a corrugated steel web post-tensioned prestressed concrete T-beam, which comprises a corrugated steel web connected with a concrete roof, and concrete wet joints are poured between the concrete roofs; Stress channel, the prestressed channel is pierced with prestressed steel strands; the adjacent connection ends of the corrugated steel web are fixed by a combination of cross-fixed connection structure and welding. The utility model adopts the combination structure of corrugated steel web, which fully exerts the utilization efficiency of steel and concrete materials; the T beam of corrugated steel web is prefabricated, which is beneficial to factory processing, ensures the construction quality, and shortens the construction period; the corrugated steel web T The beam is prefabricated by the post-tensioning method, and the equipment required for the construction method is simple. The anchorage is embedded in the structure and does not require a tensioned pedestal, so the production is flexible; the length of the T-beam segment is set to 8m, which is conducive to construction and transportation, especially for urban bridges. In other words, a small number of supports are built on both sides of the pier, the traffic capacity under the bridge is better, there is no impact on traffic, and the pollution of the surrounding environment is reduced.

Description

A post-tensioned concrete T-beam with corrugated steel web

technical field

The utility model belongs to the field of steel-concrete composite structures, in particular to a corrugated steel web post-tensioning prestressed concrete T-beam.

Background technique

With the continuous progress and development of society, especially the rapid development of the transportation industry, people's daily travel has become very convenient; however, with the popularization of transportation, the demand for transportation, roads and bridges is also increasing day by day, especially In some densely populated areas, traffic congestion has seriously affected people's quality of life and restricted urban development. Improving traffic has become a top priority. With the continuous development of road and bridge construction technology, prefabricated bridges have become an indispensable part of bridge construction, and corrugated web bridges have emerged as the times require.

Prestressed concrete beam with corrugated steel web is a new type of steel-concrete composite structure. Using corrugated steel web instead of traditional concrete web not only effectively solves the cracking problem of concrete bridge web, but also gives full play to the concrete resistance. The advantages of high compressive strength and high shear strength of corrugated steel web. At the same time, compared with the traditional concrete girder bridge, the corrugated steel web composite box girder bridge greatly reduces the weight of the upper structure and the engineering quantity of the lower structure, thereby reducing the cost, realizing the light weight of the bridge, and improving the structure. Stability, strength and efficiency of use of materials.

The most common type of prefabricated reinforced concrete girder bridge is T-shaped, which has many advantages, such as: simple structure, convenient construction, convenient industrial production, saving a lot of formwork and brackets, reducing labor intensity, shortening construction period, etc. For traditional prestressed concrete T-beams, on the one hand, the self-weight is relatively large. Under the condition of satisfying the structural stress, the weight is often reduced by reducing the thickness of the web, but the quality of concrete pouring is often not guaranteed. During the operation of the bridge, the web Slabs often have oblique cracks; on the other hand, prefabricated concrete T-beams need to bind web reinforcement and make a large number of formwork during prefabrication, resulting in high construction costs and long construction periods. When pretensioning is used, large pedestals or batches of steel molds, curing pools and other fixed equipment are required, and the one-time investment is relatively large; most of the prestressed tendons are arranged in a straight line, and the curved arrangement is more difficult.

In the construction of urban bridges, the construction method of T-beam segments prefabricated in the factory and then assembled at the construction site is widely used. This construction technology reduces the impact of bridge construction on daily urban traffic and improves the technical level of urban viaduct engineering. And the bridge is noiseless and dust-free during construction, which reduces the impact on residents around the construction and strengthens the protection of the surrounding environment. However, during the transportation of the T-beam segment, the transportation is inconvenient due to the long length of the T-beam segment and other reasons.

Therefore, it is necessary to provide a new type of T-beam that is easy to construct, can effectively solve the problem of inconvenient transportation, and reduce the occupation of the site by assembling prefabricated segments, effectively environment the traffic pressure in the urban area and avoid the pollution of the surrounding environment caused by on-site pouring. It is a question worth studying.

Contents of the invention

In order to overcome the deficiencies in the above-mentioned prior art, the utility model provides a simple structure, convenient operation and use, which greatly improves the traditional T-beam acceptance performance, material utilization rate, durability and other advantages, and at the same time reduces the impact of prefabricated segments. The occupancy of the assembly site, the environmental traffic pressure in the urban area and the post-tensioned prestressed concrete T-beam with corrugated steel web to reduce the pollution to the surrounding environment.

A corrugated steel web post-tensioned prestressed concrete T-beam, comprising a corrugated steel web 1 connected to a concrete roof 6, characterized in that: concrete wet joints 2 are poured between the concrete roofs 6; concrete roofs 6 is provided with a longitudinal prestressed channel 3, and the prestressed channel 3 is pierced with a prestressed steel beam 4; the adjacent connection ends of the corrugated steel web 1 are fixed by a combination of cross-fixed connection structure and welding ;

Described concrete top slab 6 is the prefabricated concrete top slab that length is 8m;

The connecting end of the corrugated steel web 1 is provided with fixing holes 8 longitudinally distributed along the corrugated steel web 1 and longitudinal constraint reinforcement perforations 7 distributed along the transverse direction of the corrugated steel web 1, and longitudinal constraint reinforcement perforations 7 are pierced with longitudinal Constraint bars 5;

The cross-fixed connection structure includes that the connecting ends of two adjacent corrugated steel webs 1 are crossed; the fixing holes 8 arranged at the ends of the corrugated steel webs 1 correspond to each other, and the fixing holes 8 pass through bolt fixing devices 11; Bolt gaskets 10 are arranged between the fixing caps at both ends of the bolt fixing device 11 and the outside of the end of the cross-fixed corrugated steel web 1; the two ends of the cross-fixed corrugated steel web 1 and the cross-fixed corrugated steel web The plate bodies of the plates are fixed by welding to form fillet welds 9 .

Positive and beneficial effects : the utility model adopts the combined structure of corrugated steel webs, which fully utilizes the use efficiency of steel and concrete materials, reduces the amount of concrete, is energy-saving and environmentally friendly, and has good economic effects; the T-beams of corrugated steel webs are prefabricated, Wet joints are connected to form a corrugated steel web T-beam bridge, which is conducive to factory processing, ensures construction quality, and shortens the construction period; the corrugated steel web T-beam is prefabricated by post-tensioning method, and the construction method requires simple equipment , the anchorage is buried in the structure and does not require tensioning pedestals, flexible production, suitable for on-site construction of large components; the length of the T-beam segment is set to 8m, which is conducive to construction and transportation, especially for urban bridges, a small amount of Support, better traffic capacity under the bridge, fast construction, no impact on traffic, and reduce construction pollution to the surrounding environment, good social benefits.

Description of drawings

Fig. 1 is the horizontal connection schematic diagram of the utility model;

Fig. 2 is a schematic cross-sectional view of the utility model;

Fig. 3 is the front connection schematic diagram of the utility model;

Fig. 4 is the schematic diagram of the lap joint of corrugated steel webs of the present invention;

In the figure: corrugated steel web 1, concrete wet joint 2, prestressed tunnel 3, prestressed steel beam 4, longitudinal restraint reinforcement 5, concrete roof 6, longitudinal restraint reinforcement perforation 7, fixing hole 8, fillet weld 9. Bolt gasket 10, bolt fixing device 11.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described further:

A corrugated steel web post-tensioned prestressed concrete T-beam, comprising a corrugated steel web 1 connected to a concrete roof 6, concrete wet joints 2 are poured between the concrete roofs 6; the concrete roof 6 is provided with A longitudinal prestressed channel 3, the prestressed channel 3 is pierced with a prestressed steel beam 4; the adjacent connection ends of the corrugated steel web 1 are fixed by a combination of cross-fixed connection structure and welding;

Described concrete top slab 6 is the prefabricated concrete top slab that length is 8m;

The connecting end of the corrugated steel web 1 is provided with fixing holes 8 longitudinally distributed along the corrugated steel web 1 and longitudinal constraint reinforcement perforations 7 distributed along the transverse direction of the corrugated steel web 1, and longitudinal constraint reinforcement perforations 7 are pierced with longitudinal Constraint bars 5;

The cross-fixed connection structure includes that the connecting ends of two adjacent corrugated steel webs 1 are crossed; the fixing holes 8 arranged at the ends of the corrugated steel webs 1 correspond to each other, and the fixing holes 8 pass through bolt fixing devices 11; Bolt gaskets 10 are arranged between the fixing caps at both ends of the bolt fixing device 11 and the outside of the end of the cross-fixed corrugated steel web 1; the two ends of the cross-fixed corrugated steel web 1 and the cross-fixed corrugated steel web The plate bodies of the plates are fixed by welding to form fillet welds 9 .

A corrugated steel web post-tensioned concrete T-beam bridge described in the utility model is composed of a prefabricated T-beam unit composed of a plurality of prefabricated concrete soil roofs and corrugated steel webs with a length of 8m and adjacent prefabricated The T-beams are composed of beams connected longitudinally to form porous continuous composite T-beams; the two ends of the corrugated steel webs are directly embedded in the prefabricated concrete beams.

The post-tensioning construction steps described in the utility model are roughly divided into: installing formwork and brackets in the beam field, installing and positioning the corrugated steel web, binding the steel bars in the concrete slab; pouring concrete, and then tensioning after the concrete reaches the design strength requirements. Pull the rebar.

The main process of construction described in the utility model is: first, carry out the construction of bridge piers, abutments, and cover beams; secondly, install the prefabricated corrugated steel web T beams on the bridge pier cover beams, and place two adjacent prefabricated T beams After the transverse reinforcement of the beam concrete roof is fixedly connected with the corresponding internal reinforcement of the cast-in-place component, the concrete is poured; finally, the crossbeam on the top of the T-beam pier with two adjacent holes is vertically poured, and the external prestressed reinforcement of the body is stretched and anchored, and each span is prefabricated. The T-beam elements are connected into porous continuous T-beams.

The utility model adopts the combination structure of corrugated steel webs, which fully utilizes the use efficiency of steel and concrete materials, reduces the amount of concrete, saves energy and protects the environment, and has good economic effects; The connection forms a T-beam bridge with corrugated steel webs, which is conducive to factory processing, ensures the construction quality, and shortens the construction period; the T-beams with corrugated steel webs are prefabricated by the post-tensioning method. The construction method requires simple equipment and the anchorage is embedded Because there is no need for tensioning pedestals in the structure, the production is flexible, and it is suitable for on-site construction of large components; the length of the T-beam segment is set to 8m, which is conducive to construction and transportation, especially for urban bridges. The traffic capacity is good, the construction is fast, the traffic is not affected, and the pollution of the surrounding environment is reduced, and the social benefits are good.

The above implementation cases are only used to illustrate the preferred implementation of the present utility model, but the utility model is not limited to the above-mentioned implementation, within the scope of knowledge possessed by those of ordinary skill in the art, within the spirit and principles of the utility model Any amendments, equivalent substitutions and improvements, etc., shall be considered as the scope of protection of this application.

Claims (4)

1. a Wavelike steel webplate post-stressed concrete T beam, comprises the Wavelike steel webplate (1) be connected with concrete roof (6), it is characterized in that: built concrete between described concrete roof (6) and to have wet seam (2); Concrete roof (6) is provided with longitudinal prestressed pore passage (3), in prestressed pore passage (3), is installed with prestressed strand (4); Combine fixing with welding by intersection fixed connection structure between the adjacent link of described Wavelike steel webplate (1).

2. a kind of Wavelike steel webplate post-stressed concrete T beam according to claim 1, is characterized in that: described concrete roof (6) for length be the precast concrete top board of 8m.

3. a kind of Wavelike steel webplate post-stressed concrete T beam according to claim 1, it is characterized in that: the link of described Wavelike steel webplate (1) is provided with the fixing hole (8) along Wavelike steel webplate (1) genesis analysis and the longitudinal restraint reinforced steel bar perforation (7) along Wavelike steel webplate (1) cross direction profiles, is installed with longitudinal restraint reinforcing bar (5) in longitudinal restraint reinforced steel bar perforation (7).

4. a kind of Wavelike steel webplate post-stressed concrete T beam according to claim 2, is characterized in that: the link that described intersection fixed connection structure comprises two pieces of adjacent Wavelike steel webplates (1) intersects; The fixing hole (8) being arranged on Wavelike steel webplate (1) end is corresponding, wears bolt fixture (11) in fixing hole (8); The locking cap at the two ends of described bolt fixture (11) with intersect fixing Wavelike steel webplate (1) end outside between be provided with spacer for bolt (10); Intersect the two ends of fixing Wavelike steel webplate (1) and its intersect the Wavelike steel webplate fixed plate body between by being welded and fixed, form corner welding line (9).