CN203530835U - Double-leg rigid-frame pier structure spanning existing building at small angle - Google Patents

Abstract

The utility model relates to a double-leg rigid frame pier structure spanning existing structures at a small angle. When the railway bridge intersects the existing structures under the bridge at a small angle, the entire hole cannot be spanned, resulting in a large-scale adjustment of the hole span arrangement of the railway bridge. The utility model has a pile foundation, a cap and a rigid structure pier sequentially constructed from bottom to top. There are two sets of pile foundations and the caps on it, which are respectively arranged on both sides of the existing structures under the bridge; the rigid structure pier is double Rigid piers with legs, the middle part of the bottom end is concave up, forming two side pillars, which are placed on the caps on both sides; the two side pillars of the double-leg rigid piers are inclined outward from top to bottom. The reinforced concrete double-leg rigid frame bridge of the utility model can avoid large-scale adjustment and modification of the designed railway bridge hole span arrangement, and reduce the range of variation; compared with other adjustment schemes, the increased investment amount is small; construction technology Mature, low construction difficulty, and controllable quality; its short construction period can avoid or reduce the impact of structural adjustment on the total construction period.

Description

A double-leg rigid frame pier structure spanning existing structures at a small angle

technical field

    The utility model belongs to the technical field of railway bridge construction, in particular to a double-leg rigid pier structure spanning existing structures at a small angle.

Background technique

As a linear structure, the railway as a whole will inevitably intersect with other linear structures (such as pipelines, roads, channels, etc.). In the design stage, the railway bridge spans the linear structures visible above the ground, the proven linear structures below the ground, and the planning of linear structures. After the design of the railway bridge has been completed and part of it has been constructed, it is difficult to collect the data of the underground structures, there is no clear regulation on the safety distance between the railway bridge and other structures, and the planning data changes, especially when the angle between it and the railway is small. It will lead to a large-scale adjustment of the hole span layout of the railway bridge, which will bring greater difficulty to the design and construction, and may increase investment and increase the construction period.

Contents of the invention

The purpose of this utility model is to provide a double-leg rigid frame pier structure spanning existing structures at a small angle, which can effectively avoid large-scale adjustments to the layout of railway bridge holes and spans, and reduce the negative effects of increased investment and lengthened construction period caused by new factors. Influence.

The technical scheme adopted in the utility model is:

A double-leg rigid-frame bridge pier structure spanning existing structures at a small angle, with pile foundations, caps and rigid-frame piers built sequentially from bottom to top, and is characterized in that:

There are two groups of pile foundations and caps on them, which are respectively arranged on both sides of the existing structures under the bridge;

The rigid structure pier is a double-leg rigid structure pier, the upper part is integral, and the middle part of the bottom end is concave to form two side pillars, which are placed on the two side caps.

The two side pillars of the double-leg rigid pier are inclined outward from top to bottom.

The utility model has the following advantages:

The reinforced concrete double-leg rigid frame bridge of the utility model can avoid large-scale adjustment and modification of the designed railway bridge span layout, and reduce the range of variation; compared with other adjustment schemes, the increased investment amount is small; construction technology Mature, with low construction difficulty and controllable quality; its short construction period can reduce the impact of structural adjustment changes on the total construction period. the

Description of drawings

Fig. 1 is a sectional view of the utility model.

Fig. 2 is the top view of the platform of the utility model.

In the figure, 1-railway centerline, 2-double-leg rigid pier, 3-cap, 4-water pipeline, 5-pile foundation, 6-pipe safety sideline.

Detailed ways

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

A common railway bridge pier structure consists of pile foundations, caps and pier bodies in sequence from bottom to top. Generally, all piers in a section adopt the same structural form, that is, the cross-sectional dimensions of the pier are basically equal (or change little) from top to bottom. Standard overall structure. Once the railway intersects with the existing pipeline, especially in the case of a small angle of intersection and the span layout of the bridge requires a limited adjustment range, it will not be possible to adopt a standard overall structure for the railway pier across the existing pipeline. The utility model adjusts the integral pier at the small-angle intersection with the existing structures under the bridge into a double-legged rigid wall pier, and sets the pile foundation 5 and the caps 3 on it into two groups, which are respectively arranged on the existing structures under the bridge. On both sides of the structure, and ensure that it is outside the safety edge of the pipeline, the middle of the bottom of the rigid wall pier with both legs is concave up to form two side pillars, which are placed on the caps 3 on both sides, and the two side pillars are inclined outward from bottom to top. The degree of inclination is adjusted according to the distance between the pipe width and the safety margin.

The construction steps are as follows:

(1) Excavate the position, elevation and direction of existing pipelines (or other linear structures), and clarify their safety distances;

(2) Construction pile foundation;

(3) Protection should be done during the construction of the cap to prevent the foundation of the structure from being unstable due to the excavation of the cap;

(4) Backfill the cap foundation pit and compact it;

(5) Cast-in-situ construction of the double-leg rigid frame bridge is carried out after the support and formwork are erected;

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 (2)

1. A double-leg rigid-frame bridge pier structure spanning existing structures at a small angle, with pile foundations (5), caps (3) and rigid-frame piers built sequentially from bottom to top, characterized in that: There are two groups of pile foundations (5) and caps (3) on them, which are respectively arranged on both sides of the existing structures under the bridge; The rigid-structured pier is a double-legged rigid-structured pier (2), the upper part is integral, and the middle part of the bottom end is concave to form two side pillars, which are placed on the two side caps (3). 2. A double-leg rigid frame pier structure spanning existing structures at a small angle according to claim 1, characterized in that: The two side pillars of the double-leg rigid pier (2) are inclined outward from top to bottom.

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