SU1313939A1 - Bridge pier - Google Patents

Abstract

The invention relates to bridge construction and can be used in the construction of bridge abutments, preferably in high embankments of approaches, and for high load bridges. The purpose of the invention is to increase the carrying capacity and reduce material consumption. The bridge's abutment includes a cupboard wall 1 and a nozzle 2 rigidly connected to it, located on the ledge of the head of embankment 3 and mounted on columnar supports 7 placed in the embankment body. The abutment is equipped with a trapezoidal, downward-widening shape with vertically truncated lower end sections, placed in the body of the head of the embankment in the longitudinal plane of the bridge vertically. On the upper face of the plate element 4, the attachment is strengthened, and the lower along the entire length is fixed on the column supports. 2 Il. from 9 cl

Description

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The invention relates to bridge construction and can be used in the construction of abutments erected mainly in high mounds approaches.

The purpose of the invention is to increase the carrying capacity and reduce the consumption of materials during the construction of the abutment in high embankments and for bridges of high load.

FIG. 1. shows the abutment in the longitudinal plane of the bridge, the section; on

figure 2 - the same view from the side of the span.

The abutment includes a cabinet wall 1, a nozzle 2 rigidly connected to it, located on the ledge of the head of embankment 3 and strengthened, depending on its length, on one or several plate elements 4 of a trapezoidal downward-widening shape with vertically-truncated lower end sections 5. Plate element placed in the body of the head of the embankment in the longitudinal plane of the bridge vertically. The bottom edge 6 of the plate element is reinforced along the entire length on the column supports 7, which are placed in the longitudinal direction of the bridge. In embankments of considerable height and for bridges with large spans and increased load, the plate element can be strengthened on two rows of column supports 7. The execution of the lower end sections 5 vertically truncated is necessary to exclude bending moments at the ends which does not allow them to be supported on supports and leads only to additional material costs. The end sections of the beams of the superstructure 8 are supported on the nozzle 5. The cabinet wall 1 is interconnected with the transition element 9.

When using the resist for large-span bridges with increased load from the underside of the nozzle 2 along its length in the middle part in terms of, it is advisable to reinforce the stiffening rib 10, which eliminates the possibility of nozzle deflection between the plate elements 4 and allows them to be installed over long distances other.

Stomach works as follows

When the bridge is loaded, the loads from the span and through the packing are transferred to the plate elements, while the resistance to the perception of the longitudinal horizon

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The total loads are significantly increased by placing the supports in the longitudinal bridge of the plane, which is ensured by the presence of a trapezoidal plate element with a downwardly widened shape. Placing supports in the longitudinal bridge of the plane together with the plate element, significantly increasing the resistance of the abutment to horizontal loads, minimizes the ground pressure on the abutment from the embankment, which further increases the stability and, consequently, the bearing capacity of the abutment. The presence of the plate element, on the one hand, by reducing the height of the supports, and on the other hand, by supporting the bottom edge of the plate element on the ground and transferring part of the load onto it, reduces the vertical load perceived by the supports and the bending moment in them, which allows significantly reduce the number of supports.

The implementation of the slab element with a ratio of sizes that are within the appropriate limits allows, with the possible cost of material costs, to ensure the full inclusion in the work of all longitudinally placed supports and a much larger volume (Soil.

The placement of the supports in the longitudinal direction due to the presence of the plate element allows to provide, under conditions of high embankments, an increase in bearing capacity with a significantly smaller number of supports compared with the transverse placement relative to the longitudinal plane of the bridge due to a significant decrease in the constant load on the supports, which eliminates the presence of foundation, also reduces the consumption of materials. Thus, the proposed design allows us to use it in high embankments of long-span bridges, while providing a significant reduction in material intensity and an increase in bearing capacity and operational stability, which leads to the expansion of its field of application and a reduction in the total cost.

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Claims (1)

g Formula of invention Abutment of the bridge, including a cupboard wall and a nozzle rigidly connected to it, located on the ledge of the head313 NOR parts of the embankment and reinforced on the column supports placed in the embankment body, characterized in that, in order to increase the carrying capacity and reduce material consumption when exposed to high embankments and for bridges of increased load, the abutment is provided with a plate element 139394 coping trapezoidal shape with truncated end sections, spaced in the body of the head of the embankment in the longitudinal plane of the bridge, on the top 5 of which the nozzle is fixed, and the bottom is fixed on column supports arranged in the longitudinal plane. UT rTTTTTTinr Tl one 2 /  . . - .., ....-. , I about. . . Li-j  .. ...--. . Sh-. ; ..- I SV 70 pn one 7  / LH /// // V / XX / 77 // / Editor M.Petrova Compiled by E.Koltashova Tehred V.Kadar Proofreader V.Romanenko 2185/29 Circulation 489 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5 Production and printing company, Uzhgorod, st. Project T . . : .... I: - - .; . ... "". .. / // 7 /// // 7/7 /