CN204282194U - A kind of high-speed railway split blade type channel beam wind shielding structure - Google Patents

Abstract

The utility model relates to a wind-shielding structure of a segmented trough beam for a high-speed railway. The existing windproof measures for ordinary-speed railway bridges cannot meet the windproof requirements of high-speed railway bridges in windy areas. In the utility model, upright columns are arranged at intervals on the web of the trough-shaped beam, and windshields are fixed between adjacent uprights, and windshield openings are arranged on the windshields; the windshields are transverse corrugated steel plates with an opening ratio of 20 %; Each board is 0.5m high, 2.0m long, 4mm thick, and 70mm wave height; the total height of the seven boards combined in parallel is 3.5m. The windshield structure of the utility model is composed of "trough beam + column + windshield". The beam web structure and the upper windshield structure together play the role of preventing crosswind, changing the crosswind effect on the car body, The critical wind speed for safe train operation is improved, the stability of train operation is increased, and operational failures are reduced.

Description

A high-speed railway segmental channel beam windshield structure

technical field

    The utility model belongs to the technical field of high-speed railway wind protection, and in particular relates to a high-speed railway segmented channel beam wind protection structure.

Background technique

The Baili wind area in Xinjiang is one of the most severe railway wind disasters in my country and even in the world. Existing railways have experienced speed limit and stoppages many times, and there have even been major accidents in which trains were overturned by strong winds, causing serious damage to railway transportation and production. significant loss. For the Bailifeng area, due to harsh construction conditions, extreme drought and water shortage, it is impossible to set up a beam yard, and the prefabricated erection of the existing high-speed railway box girder cannot be realized. A new beam type is needed to solve this problem. At the same time, most of the existing theoretical studies and technical measures of wind protection at home and abroad adopt wind-shielding structures on the bridge deck to play a role in wind protection. If the windshield structure is damaged, the safety of the train will be difficult to guarantee under strong cross winds. Therefore, it is necessary to develop a safer and reasonable windproof structure system to meet the needs of trains passing through the windy area safely and quickly.

Contents of the invention

The purpose of the utility model is to provide a high-speed railway segmental channel beam windshield structure to improve the driving safety of the high-speed railway.

The technical scheme adopted in the utility model is:

A high-speed railway segmented channel beam windshield structure, characterized in that:

Columns are arranged at intervals on the web of the channel beam, windshields are fixed between adjacent columns, and windshield openings are arranged on the windshields.

The column is H-shaped steel.

The bottom surface of the column is provided with a base plate, and the base plate is symmetrically provided with stiffening plates;

The upright column is fixed to the channel beam web embedded parts in the channel beam web through the bottom plate, so as to be vertically fixed on the channel beam web.

The windshield is a transverse corrugated steel plate with an opening rate of 20%; each plate is 0.5m high, 2.0m long, 4mm thick, and has a wave height of 70mm; the total height of the seven plates combined in parallel is 3.5m.

The left and right ends of the windshield are provided with card slots, and the windshield is fixed to the column through the windshield fixing bolts.

The utility model has the following advantages:

1) The windshielding effect is good, and the safety of the train under cross wind is high

The height of the channel girder is 2.0m, the thickness of the bottom plate is 0.45m, the track structure is directly set on the bottom plate; the wind-shielding structure is set on the web, the height is 3.5m, and the opening ratio is 20%. The wind-shielding effect of the combined wind-shielding structure Obviously, the overturning moment of the train under the cross wind is reduced to about 80% of that without the windshield structure, and the safety of the train under the cross wind is high.

2) Low building height and high rigidity, meeting the operation requirements of high-speed railway

Compared with the box girder, the building height can be reduced by more than 2.5m, which has obvious advantages; at the same time, the structural rigidity is large, which meets the requirements of ballastless track; The bridge crane is erected quickly at a long distance. It is the first time that channel beams are applied to high-speed railway bridge engineering in my country. the

3) The connection between the column and the beam web is highly secure. Compared with the traditional structure in which the column is only connected to the beam retaining wall, the beam web can provide a larger anchoring distance and anchoring depth, fully satisfying the anchorage of the connecting bolts. Require. Solve the problem of insufficient wind-shielding capacity caused by the bolt fatigue of ordinary speed wind-shielding structures.

4) It can meet the windproof requirements of the train and also meet the windproof requirements of the catenary

The single-side or double-side windshield structure can ensure the overturning safety of the train, and at the same time, the wind speed at the catenary is relatively small.

Description of drawings

Fig. 1 is the elevation view of the windshield structure on both sides of the channel beam.

Fig. 2 is a side view of the windshield structure on both sides of the channel beam.

Figure 3 is a structural diagram of the windshield.

In the figure, 1-column, 2-stiffening plate, 3-bottom plate, 4-channel beam web embedded part, 5-channel beam web, 6-wind deflector, 7-wind deflector fixing bolt, 8 -windshield opening, 9-card slot.

Detailed ways

The utility model is described in detail below in conjunction with specific embodiments.

The utility model proposes a brand-new high-speed railway wind-shielding structure form, and the high-speed railway sliced groove-shaped beam wind-shielding structure. For the first time, the concept of combining the beam body with the wind-shielding function and the wind-shielding structure in the core area of the strong wind was proposed, and the groove-shaped beam was applied to the high-speed railway bridge project for the first time. The windshield structure provides a new option.

It relates to a high-speed railway segmented channel beam windshield structure, which is suitable for channel beam bridge structures. Columns 1 are arranged at intervals on the web 5 of the channel beam, which are H-shaped steel, and are arranged on both sides. The longitudinal interval of the columns 1 is 1.6m. The bottom surface of the column 1 is provided with a base plate 3, and a stiffening plate 2 is arranged symmetrically on the base plate 3; the column 1 is fixed to the channel beam web embedded part 4 in the channel beam web 5 through the base plate 3, so as to be vertically fixed on the channel beam web. Beam web 5. A windshield 6 is fixed between the adjacent columns 1, and the windshield 6 is provided with a windshield opening 8, all of which are round-ended holes, and the opening ratio is 20%, which is the most significant for the train wind reduction effect Reduced openings on the lower side can further improve the wind reduction effect. The windshield 6 is a horizontal corrugated steel plate. For the convenience of installation and manufacture, it is vertically divided into 7 unit plates, each plate is 0.5m high, 2.0m long, 4mm thick, and the wave height is 70mm. The total height of the 7 plate parallel combination is 3.5m . The left and right ends of the windshield 6 are provided with card slots 9 , and the windshield 6 is fixed to the column 1 through the windshield fixing bolts 7 .

The wind-shielding structure of the utility model is composed of "trough-shaped beam+column+wind-shielding plate". The beam body adopts a 16m split trough structure, with two single-line beams juxtaposed horizontally, and the total width of the bridge deck is 12.76m. The channel beam not only bears the vertical live load of the line, but also participates in horizontal wind protection as a part of the wind protection structure. The beam web structure and the upper windshield structure together play the role of preventing cross wind.

The position of the catenary column adopts the structural form of the windshield structure column and the catenary column, which optimizes the layout of the bridge deck, reduces the width of the channel beam, and saves investment.

The construction sequence is generally arranged as follows: burying the embedded parts of the windshield structure when tying the steel bars in the beam yard → pouring the channel beam body → measuring the position of the embedded parts and meeting the design requirements → erecting the beam body → processing the steel components near the work site Centralized prefabricated column 1, windshield 6 and other components → transported to the site → install column 1 and tighten the nuts of column 1 and channel beam web embedded part 4 → install windshield 6 in sequence from bottom to top Insert the slot and tighten the windshield column 1 and windshield fixing bolt 7 → install the bolts between the windshield.

The column 1 is made of H-shaped steel, and the bolt holes for connecting with the windshield are reserved. After the fabrication is completed, the column and the unit plate are trial assembled in the factory. After the accuracy meets the requirements, they are transported to the site.

The column 1 is hoisted to the position of the theoretical center line by a crane, and the vertical beam surface of the component is ensured, and then the column and the channel beam are connected by nuts to form a whole.

After inspecting and adjusting the windshield structure, the high-strength bolts should be initially screwed, and the high-strength bolts that have been initially screwed should be checked by knocking, and straight marks should be drawn on the bolts, nuts, washers and components, so as to check whether there is any damage during the final screwing. Leakage and washer or bolt turning. The torque method is used for final screwing, and the torque wrench must be calibrated before use, and the torque error shall not be greater than ±5% of the used torque value. The initial and final tightening of high-strength bolts shall be completed within the same working day.

If the embedded parts and additional anchoring steel bars and steel plates collide with the bellows during installation, the steel bars can be moved or bent appropriately, and the minimum protective layer requirements should be guaranteed.

The content of the utility model is not limited to the examples listed, and any equivalent transformations taken by those skilled in the art to the technical solution of the utility model by reading the specification of the utility model are covered by the claims of the utility model.

Claims (5)

1. A high-speed railway segmented channel beam windshield structure, characterized in that: Columns (1) are arranged at intervals on the channel beam web (5), windshields (6) are fixed between adjacent columns (1), and windshield openings (8) are arranged on the windshields (6) ). 2. A kind of high-speed railway segmented channel beam windshield structure according to claim 1, characterized in that: The column (1) is H-shaped steel. 3. A kind of high-speed railway segmental channel beam windshield structure according to claim 2, characterized in that: The bottom surface of the column (1) is provided with a base plate (3), and the base plate (3) is symmetrically provided with a stiffening plate (2); The column (1) is fixed upright on the channel beam web (5) through the bottom plate (3) and the channel beam web embedded part (4) in the channel beam web (5). 4. A kind of high-speed railway segmental channel beam windshield structure according to claim 3, characterized in that: The windshield (6) is a transverse corrugated steel plate with an opening rate of 20%; each plate is 0.5m high, 2.0m long, 4mm thick, and has a wave height of 70mm; the total height of the seven plates combined in parallel is 3.5m. 5. A kind of high-speed railway segmented channel beam windshield structure according to claim 4, characterized in that The left and right ends of the windshield (6) are provided with card slots (9), and the windshield (6) is fixed to the column (1) through the windshield fixing bolts (7).