SU1408020A1 - Foundation under column - Google Patents

Abstract

The invention relates to the field of construction and concerns the construction of separately standing foundations for columns of buildings and structures. The purpose of the invention is to improve the static operation of the foundation due to the redistribution of its internal efforts - achieved by making the foundation with a reinforced concrete frame of angular section 6. The foundation unit 1 has a central expanding lower protrusion 4 and lateral consoles 5. The vertical-oriented element of the reinforced concrete section is tapered. 3 W1. Q §

Description

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The invention relates to the construction and construction of separate reinforced concrete foundations for columns of buildings and structures.

The purpose of the inventions is to improve the regular operation of the foundation by redistributing its internal forces.

I Fig. 1 shows a foundation for a column, a cross-section; on) 2 - the same, top view; in FIG. 3, the same, when the peripheral plates of the sector-trapezoid-1OY form are made.

The foundation consists of block 1, peripheral plates 2 and links 3, Block 1; it is made with a central lower projection 4 and lateral consoles 5, the lower elevation of which is inclined to the axis of installation. The portions of the lower surfaces of the consoles 5 adjacent to the lateral surfaces of the protrusion 4 are horizontal.

In the manufacture of the foundation on the horizontal sections of the consoles 5, metal support plates are installed, two for each console. The same plates are installed on the lateral plates 2 at their contact points with the horizontal sections 1 | 1 and the consoles 5,

The protrusion of block 1 is made expanding downwards. Plates 2 have a trapezoidal or sector-trapezoidal shape in Hshan, are placed around the protrusion under the consoles of block 1 and are connected to block 1 by means of links 3. The geometrical dimensions of the lateral sides of the peripheral stitches 2 are assigned to | after changing the shape of the sides, when the lower base of the foundation takes the shape of a tent.

Links 3 are internal and necessary for the initial stage of the foundation operation, they are installed at the Lower Armature level of peripheral Clit 2 and are performed as a continuation of the reinforcement or as independent elements of short reinforcement rods.

The external connection of the block and the periphery of the WIIT is reinforced concrete 6 angular sections, encompassing the peripheral plates 2 along their upper contour. Moreover, the vertical section of the cross section of the reinforced concrete frame is narrowed downwards.

The foundation can be prefabricated or prefabricated. First, slabs 2 are made with connections 3, then the rest of the foundation. When using precast-monolithic basement slab2 is made directly,. at the construction site.

The foundation works as follows.

Before the failure of communications 4, the load from the column is transmitted by the unit

5 the soil of the base and the horizontal sections of the consoles 5 to the horizontally located plates 2, the reactive pressure is distributed along the base according to a certain law so that its value under block 1 is higher than under the plates 2, but the difference is insignificant. In this connection 3, holding the plate 2 from rotation, are stretched,

5 After the failure of communications, the lower bottom of the basement takes the form of a tent. The reactive pressure is advantageously redistributed along the base. the highest value

0 under block 1 and decreasing to the edges of the plates 2, This leads to a decrease in internal forces in the plates 2 and a decrease in the metal consumption for their reinforcement; The reinforced concrete frame 6 is put into operation and keeps the slabs 2 from large horizontal displacements caused by the movement of the soil.

The plates 2, which form the tent, are working, thawing as a spacer structure in their plane and as a bending console — out of the plane. At all stages of the proposed foundation, the concrete of block 1 remains compressed and does not need reinforcement.

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Claims (1)

Invention Formula The foundation for the column, including the block, made with the central lower ledge and side consoles, the bottom surface of which is inclined to the basement axis, and the peripheral plates, placed around the cubicle under the block consoles and connected to the block by means of connections, so that that, in order to improve the static work of the foundation due to the redistribution of its internal efforts, the foundation is provided with a reinforced concrete corner frame covering the peripheral plates along their upper contour, the protrusion being extended Vertically oriented element of the frame, chen - frame narrowing downwards. C} and d. 2 Fig.d