SU1491965A1 - Pile cap - Google Patents

Abstract

The invention relates to construction and is used to submerge composite piles using pile hammers. The purpose of the invention is to increase the efficiency of immersing sections of composite piles with an open top cavity in the head section. The cap comprises a hollow body 1 with inclined side walls. In the cavity of the housing 1 is placed a spring-loaded liner 2 with a damping gasket on the outer surface. The shape of the liner 2 corresponds to the shape of the cavity of the head part of the pile section 3. Between the bottom of the hollow body 1 and the end of the pile section 3 there is a rigid damping gasket 6. Between the side walls of the body 1 and the head part of the pile section 3, there is a tapered yoke 7 with wedge damping elements 8. Design head cover provides differential transfer of dynamic load- more to the bottom of the cavity of the head part of the pile section and less to its end. In this case, the compression of the lateral surface of the pile head is carried out over the length of the tension zone itself, taking into account the transfer of the load along the bottom of the cavity of the pile head part and its distribution at an angle of 45 °. 2 hp f-ly, 1 ill.

Description

one

(21) 4262772 / 29-33

(22) 06/15/87

(46) 07.07.89. Bup. Number 25

(71) Far Eastern Scientific and Research Institute for Construction

(72) N.V.Lifar and Yu.V.Ostropoltsev (53) 624.155.15 (088.8)

(56) USSR Author's Certificate No. 458635, kp. E 02 D 13/10, 1973.

USSR Author's Certificate No. 614170, cl. E 02 D 15/10, 1977.

(54) PORK HEAD

(57) The invention relates to construction and is used to submerge piles using pile hammers. The purpose of the invention is to increase the efficiency of immersing sections of composite piles with an open top cavity in the head section. The cap comprises a hollow body 1 with inclined side walls. In the cavity of the housing 1 podprutkinen placed

(L

ten

four; with

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SP

insert 2 with a damping gasket on the outer surface. The shape of the liner 2 corresponds to the shape of the cavity of the head part of the pile section 3. Between the bottom of the hollow body 1 and the end of the pile section 3 there is a rigid damping gasket 6. Between the side walls of the body 1 and the head part of the pile section 3, there is a tapered yoke 7 with wedge damping elements 8. Design on

The invention relates to the construction, i.e. for the sinking of composite piles with the help of piling hammers.

The purpose of the invention is to increase the efficiency of immersing sections of piles with an open top cavity in the head section.

The drawing shows the cap.

The headrest contains a hollow body 1, the side walls of which are inclined to form a socket widening downwards.

The liner 2 is placed in the body cavity and is shaped according to the shape of the cavity of the head part of the pile section 3. The surface of the liner facing the pile has a damping gasket 4. A spring damper 5 is placed between the bottom of the hollow body 1 and the bottom of the liner 2, and between the bottom of the hollow The housing 1 and the end of the pile section 3 have a rigid damping gasket. The height of the liner 2- exceeds the depth of the cavity of the head of the pile section 3 by 1/50 - 1/60 of the pile diameter.

Between the side walls of the housing 1 and the head of the pile section 3, there is a tapered yoke 7 with wedge amps 8. The tapered yoke 7 is made up of four metal plates interconnected, the outer surface of which is lubricated. The depth of the socket formed by the tapered yoke 7, exceeds the height of the spring-loaded liner 2 by an amount equal to the difference of the radii of the pile section and the lower part of the cavity of its head.

Located between the bottom of the hollow body and the end of the pile section 3, the damping gasket 6 has a thickness equal to the sum of the thickness of the damping

the head provides a differential transfer of dynamic load - more to the bottom of the cavity of the head part of the pile section and less to its end. In this case, the compression of the side surface of the pile head is carried out over the length of the most stressed zone, taking into account the transfer of the load along the bottom of the cavity of the head part of the pile section and its distribution JIOR by an angle of 45 °, 2 ° C. f-ly, 1 ill.

five

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five

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five

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strip 4 under the end of the spring-loaded liners 2 and the difference of the height of the liner 2 and the depth of the cavity of the head part of the pile section 3.

In the upper part of the housing 1 has a stacked cavity 9 with a shock absorber 10.

The pile cap works as a child in a cim way.

When the pile hammer strikes through the shock absorber 10 across the bottom of the hollow body 1, the spring-loaded liner 2 moves downward, compressing the spring shock absorber 5, and transfers the dynamic load through the rigid damping gasket 4 to the bottom of the cavity of the head section of the pile section 3. At the same time, the mechanical load through the damping gasket 6 is taken to the end of the pile section 3. Teach that the damping gasket 6 is thicker than the gasket 4, the end of the pile section takes a smaller load than the bottom of the cavity of the head section imo have to maintain the pile head. Simultaneously with the transfer of dynamic load on the end of the pile section and the bottom of the cavity of its head part, the lateral surface of the head section is compressed due to the entry of the conical socket of the housing 1 to the tapered yoke 7 with the wedge damping elements 8.

When removing the dynamic load, the spring shock absorber 5, having a stiffness greater than the weight of the cushion cap and workpiece (not shown), lifts the cushion cap, which at the same time slides over the casing 7 having a lubricant on the side surface.

Headband design provides differentiated transmission

dynamic load is more at the bottom than at the end of the pile section, crimping the side surface of the pile head to the length of the stress zone itself, taking into account the load transfer along the bottom of the cavity of the head part of the pile section and its distribution at an angle of 45, which in turn provides a significant increasing the efficiency of the pile driving.

Claims (3)

Claim 1. Pile head, contents hollow body with a spring-loaded liner located in its cavity interacting with the pile head, characterized in that, in order to increase the efficiency of immersing sections of composite piles with an open top cavity in the head part, spring-loaded inserts are made according to the shape of the cavity of the head part of the pile section, and on the surface facing the pile, it has a damping gasket, and its height exceeds the depth of the cavity of the head hour ten g 4919656 These sections of the pile are 1/50 - 1/60 of the pile diameter. 2, the cap according to claim 1, characterized in that the side walls of the hollow body are inclined to form a socket widening downward, and between them and the head of the pile section there is a tapered yoke with wedge damping elements, the depth of the bell formed by the conical yoke, exceeds the height of the spring-loaded liner by an amount equal to the difference of the radii of the pile section ed of the lower part of the cavity of its head. 3. Headrest according to claim 1, characterized in that between the bottom of the hollow body and the end of the pile section there is a damping pad, the thickness of which is equal to the sum of the damper damping pad under the end of the spring-loaded liner and the difference between the height of the insert and the depth of the cavity of the head part of the pile section . 20 25