SU896153A1 - Bridge pier - Google Patents

Description

((5) STAINLESS

I

The invention relates to mechanical engineering and can be used in the construction of bridge abutments.

The abutment of the bridge is known, which includes the cabinet part, the massive body and the foundation of Dl.

The disadvantage of this is that it is significant in its material consumption and laboriousness of installation.

The closest to the technical essence of the invention is the bridge abutment, which includes the cabinet part and the wall hinged on the foundation, the wall being installed vertically and equipped with a discharge bolt, forming together with the wall an L-shaped frame 2.

The disadvantage of the well-known conventional system is its relatively high material consumption due to the presence of a sufficiently powerful bolt, the laboriousness of the installation due to the need to attach the bolt to the wall and in place and the lack of reliability

the work was sustained due to the impossibility of providing high-quality compaction of the soil and rash under the discharge bolt.

The purpose of the invention is to reduce the material consumption, the complexity of installation and increase the reliability of operation

This goal is achieved by the fact that, in the bridge deck, which includes the cabinet part and the wall hinged on the base, the wall is inclined towards the head, the embankment part and the embankment supported on the ground, the angle л of the wall inclination to the vertical is determined by the ratio, where H is the angle internal friction of the soil of the mound.

FIG. 1 and 2 shows the proposed abutment.

The abutment contains the foundation 1, a ball 20 which is nerno supported on it by means of a cylindrical hinge 2 wall 3, installed inclined at an angle оС to the vertical in the sides of the head

parts of embankment 4, and the cabinet part 5, on which, through the supporting parts 6, beams of the superstructure 7 are installed. The cylindrical hinge 2 is mounted in the recess 8 of the foundation 1, which is advisable to be installed on piles 9. Wall 3 is supported on the ground of the embankment 4 by the Y face

Installation is expediently carried out in the following sequence.

Initially, a foundation 1 is mounted on the piles 9, on which a wall 3 is installed using a crane (not shown), the cylindrical hinge of which is placed in the recess 8 of the foundation 1. After the wall is installed on the foundation, it is inclined to the calculated angle cc and the position of the wall is fixed , spacers (not shown) attached to it from the side of the span. Then dumping and compaction of the embankment k are made, the supporting parts 6 are mounted on the cabinet part 5 and the spans 7 are mounted on them.

Tol1 (Inu (G wall 3 can be determined approximately from the expression

b 5. ° L S i p ot.

where E is the pressure of the soil of the embankment;

P is the constant load from the span;

L is the wall length;

- volume weight of the wall material;

L-- the angle of inclination of the wall to the vertical, defined by the expression

 - f.,

where y is the angle of inclination of the internal friction of the soil of the embankment. Ground pressure E is determined by

from the expression

E ijh.

where is the bulk weight of the embankment soil; h - height is usto; tg (if5 -)

G1 2

961534

In the proposed device, due to the inclination and bearing of the wall directly on the ground, its pressure in the direction of the span is reduced and vertical

J The load from the span wall is laid out on a horizontal and longitudinal acting wall. Horizontal loading balances the pressure of the soil, which decreases for estimates

10 of its inclined position, which makes it possible to eliminate the presence of the bolt and additional equipments for balancing the stationary bracket, and, consequently, simplifies its installation. The load on the cement decreases, since it does not perceive the entire vertical load, but only its component, acting longitudinally to the wall, which allows to reduce the dimensions of the foundation,

2 "Due to the presence of a horizontal guide, counter-resistance to horizontal loads directed in the direction of the span from linear deformations of the span and braking of transport increases, which increases the operational strength of the rig.

Claims (1)

Invention Formula The abutment of the bridge, including the cabinet part and the wall hinged on the foundation 4, is different from the fact that, in order to reduce material consumption, installation complexity and increase the operation reliability of the device, the wall is inclined towards the head of the embankment and supported on the ground embankment, and the angle dL of the inclination of the wall to the vertical is determined by the ratio сС 6, 45 - -, where if is the angle of the internal rubbing ground embankment. Sources of information taken into account in the examination To Kovalenko, S.N., Supports of Bridges, M., Transport, 1966, p., 113-116. 2, USSR Author's Certificate No. AU351, class, E 01 D 19/02, 1971.