SU547499A1 - Foundation block - Google Patents

Description

one

The invention relates to the construction, in particular the foundations of structures erected on frozen pears.

There is a known foundation block for a structure erected on frozen rpyine, which includes horizontal axes connected by racks {1.

This unit is installed in a narrow trench formed in the ground by a mechanism that provides high industrial methods for building the foundation of the structure. However, the known foundation block has a small bearing capacity, limited by the width and depth of the trench, limited by the capabilities of the bar mechanism.

The foundation block of increased bearing capacity is also known, which includes interconnected S1011ki between each other, between which are located longitudinal elements made in the form of walls 2.

An increase in the carrying capacity of such a foundation block is achieved by the freezing of the soil solution with the lateral surfaces of the longitudinal walls.

However, the bearing capacity of the block is limited by the limiting bearing capacity on the surface of the soil under the bottom of its lower body and the rock of frozen ground along the side surface of the block.

The purpose of the invention is to increase the carrying capacity of the foundation block.

This is achieved by the fact that the longitudinal elements are made in the form of beams located along the river, the distance between which and between the lower horizontal axis and the beam adjacent to which is mainly determined by the ratio

, - ck

where b is the width of the beam;

RCM- resistance of frozen ground RCK resistance of frozen ground to rock;

The increase in the bearing capacity of the foundation block is achieved by resting its beams on the frozen ground and the work of the latter under the NNM to see, which is several times greater than the preliminaries of the frozen ground and limiting the frozen pile to the frozen 1

, soil on the surface of the foundation block.

FIG. 1 shows the foundation block; aa fig. 2 - foundation block, installed in the trench in the design position, transverse section.

I TfflaMeHTHbffl block includes horizontal upper 1 and lower 2 traces, interconnected by posts 3, between which horizontal beams 4 are monolithically fixed, having vertical holes 5 and a width equal to the width of the posts. The distance between beams 4, as well as between the bottom of catfish 2 and the beam 4 adjacent to it, is taken in accordance with the ratio

h to

where b is the width of the beam; RCM resistance of frozen soil see shyu;

RCK resistance of frozen ground to spalling.

For the installation of the foundation block in the ground}, a trench 6, which is then leveled with a sandy surface, is installed in the bottom of the mechanism, which is filled with a mechanism. The foundation block is inserted into trench 6 and is filled with sandy soil of flowing consistency 8 with compaction of this soil by vibrating with pin vibrators lowered into trench 6 through vertical holes 5 in the beams. Soil 8, located between the beams 4 of the foundation block, plays the role of reinforcing longitudinal walls.

By making the longitudinal elements in the form of beams, the carrying capacity of the foundation block is increased by up to 15% compared to the equally well-known block. In addition, the material consumption of the beams of the faction block is less.

than the material intensity of the longitudinal walls, o provides a reduction in the material intensity of the base unit by 8-10%, and this reduction of material intensity is achieved while simplifying the design of the base unit, in which the beams freely perceive the forces from the bottom of the soil freezing in the trench.

Claims (2)

1.Zhurnal Rural Builder, №11, 1971, p. nineteen. 2. USSR author's certificate No. 503983, M.C. E 02 D 27/34, 1974; P L 1 FIG. 2