RU2223367C2 - Foundations - Google Patents

Abstract

FIELD: construction of flat foundations - shells for industrial purposes and civil engineering. SUBSTANCE: foundation includes plate, which is put over designed curvilinear base. Plate has concave lover surface in comparison with base surface. Plate lover surface is formed as shell having zero or positive Gaussian curvature with relation between rise and span equal to

Description

The invention relates to the field of construction of areal foundations and can be used in industrial and civil engineering.

Solid foundation slabs used in industrial and civil engineering are known [1]. The disadvantage of such structures is the work on bending, which leads to unreasonably high consumption of materials.

Closest to the invention is the foundation in the form of multi-wave shells convex down [1]. The shell material is reinforced concrete. For a given design scheme, the shell works mainly for compression.

The disadvantage of such structures is the difficulty of forming the base, the introduction of additional elements for the perception of spacer efforts, as well as significant additional costs for the installation of floors.

The aim of the invention is the creation of effective areal foundations in compliance with a given reliability supra-foundation design.

, причем плита выполнена из армированного стальной или синтетической арматурой бетона с однослойным или двойным армированием и ограничена системой перекрестных балок по периметру.The solution of this technical problem is achieved by the fact that in the foundation, including a slab with a bottom surface concave in relation to the base, laid on a planned curved base, according to the invention, the bottom surface of the slab is made in the form of a shell of zero or positive Gaussian curvature with the ratio of the boom to span

moreover, the slab is made of concrete reinforced with steel or synthetic reinforcement with single-layer or double reinforcement and is limited by a system of cross beams around the perimeter.

The invention is illustrated graphically, where:

figure 1 shows a perspective view of the foundation with a curved bottom surface of zero Gaussian curvature;

figure 2 is a perspective view of the foundation with a curved bottom surface of positive Gaussian curvature;

figure 3 is a section aa in figure 1.

. Введение искусственного основания 4, на основе минеральных материалов - щебень, гравий и т.д., под пролетную часть плиты 1 снижает деформативность основания 4 и приводит к благоприятному распределению реактивных давлений по контакту плита - основание. Пролетная часть плиты 1 выполняется из армированного бетона. В качестве несущего элемента оболочки используется стальная арматура (на чертежах не показана), обработанная антикоррозионными составами или синтетические волокна (на чертежах не показана) с высоким модулем упругости. Распор в конструкции снижается за счет конечной жесткости оболочки в пролете. Восприятие распора осуществляется за счет совместной реализации сил трения по контакту оболочка - грунт и значительной изгибной жесткостью опорной зоны 3 в горизонтальной плоскости. Заанкеривание арматуры (на чертежах не показана) производится в теле бетона опорных перекрестных балок 2. Армирование плиты 1 в пролетной части выполняется однослойным либо двойным.This foundation is presented in the form of a plate 1 with a curved outline of the lower surface 2, limited by a system of cross beams 3 (figure 1). With such a structural form, the span of the plate on an artificial base 4 works primarily in tension. The lower surface of the plate 1 is made in the form of a shell of zero or positive Gaussian curvature with the ratio of the boom to the span

. The introduction of artificial base 4, based on mineral materials - crushed stone, gravel, etc., under the span of the plate 1 reduces the deformability of the base 4 and leads to a favorable distribution of reactive pressures along the contact plate - base. The span of the slab 1 is made of reinforced concrete. As the supporting element of the shell, steel reinforcement (not shown in the drawings) treated with anti-corrosion compounds or synthetic fibers (not shown) with a high modulus of elasticity is used. The span in the structure is reduced due to the final stiffness of the shell in flight. The perception of the thrust is carried out due to the joint implementation of the friction forces at the shell – ground contact and the significant bending stiffness of the support zone 3 in the horizontal plane. Anchoring of reinforcement (not shown in the drawings) is carried out in the concrete body of the supporting crossbeams 2. The reinforcement of the slab 1 in the span is single-layer or double.

Sources of information

1. Tetior A.N. Design and construction of cost-effective foundation designs. Kiev: Budivelnik, 1975, 200 p.

2. Vanyushkin S.G. Features of the interaction of multi-wave foundations-shells with the base. Abstract. Cand. diss. Dnepropetrovsk, 1985.

Claims (1)

The foundation, including a plate with a bottom surface concave in relation to the base, laid on a planned curved base, characterized in that the bottom surface of the plate is made in the form of a shell of zero or positive Gaussian curvature with the ratio of the lifting arrow to the span

moreover, the slab is made of concrete reinforced with steel or synthetic reinforcement with single-layer or double reinforcement and is limited by a system of cross beams around the perimeter.

Images