RU2094568C1 - Modular foundation - Google Patents

Abstract

FIELD: construction engineering. SUBSTANCE: modular foundation is intended for dwelling, public, and industrial buildings. High load-bearing capacity of such foundation is combined with simplified design and reduced labour cost. Subsurface section of foundation is made up of two support columns of cast-in-place concrete and other materials which can displace from calculated position in designing and construction within predetermined limits at retaining load-bearing capacity. Ground surface section of foundation is made up of double-cantilever beam from concrete, reinforced concrete, standard concrete or reinforced concrete articles produced by industry. Beam rests on support columns at level of ground surface design elevation around foundation or below it. EFFECT: high efficiency. 5 dwg

Description

 The invention relates to the construction of foundations and is used for the construction of residential buildings, utility buildings and other types of buildings.

 Closest to the invention is a modular foundation, consisting of an underground part in the form of supports from pyramidal precast piles and a ground part in the form of a double-beam beam from a precast reinforced concrete slab grillage. Pyramidal piles have a more developed headband surface compared to prismatic piles, are hammered, as a rule, to the design elevation, and individual elements of a slab grillage are mounted on them with the formation of cantilever overhangs. The joints between the individual elements of the slab grillage are monolithic to each other with equal strength monolithic reinforced concrete joints. A plate grillage is calculated as a multi-span beam (plate) on an elastic base, which is equally strong along the length. In such foundations at the intersections of external and internal walls, temperature and sedimentary joints, additional supports, structures, etc. are required.

 The purpose of the invention is the foundation device for a building of any configuration using one element of a simplified design while reducing costs and maintaining bearing capacity.

 This goal is achieved by the fact that the underground part of the modular foundation consists of two separate pillars of concrete, concrete, and other materials, which during design and production work can be performed with an offset from the design position in the limit determined by the calculation.

 The ground basement consists of a double-girder beam (hereinafter referred to as the beam) from concrete or reinforced concrete, standard concrete and reinforced concrete products (foundation blocks, beams, girders, panels, etc.), brick and other materials, and pillar supports resting on the underground part at the level of the planning surface of the earth around the foundation.

 The soil base under the pillar supports is performed by tamping, drilling, manually, etc. to a depth of 60 cm or more.

 When erecting a modular foundation on heaving soil bases, its pillar supports are made with broadening of the cross section at the level of the sole or higher, or with the construction of a sandy foundation and backfilling of the sinuses with sand to extinguish the heaving forces and reduce the laying depth.

In FIG. 1 shows a general view of a modular foundation, section along the facade; in FIG. 2, section AA in FIG. one; in FIG. 3 design scheme; in FIG. 4
design diagram of the moment from the load in the ground part, foundation; in FIG. 5
An example of the foundation for a residential building (cottage) using a modular foundation.

 The modular foundation (Fig. 1) consists of: pillar supports 1, double-beam beam 2. Pillar supports 1 are based on a soil base 3, which has a minimum depth of 60 cm, and is performed: by tamping, drilling, manually.

 In FIG. 2 shows a section AA of the modular foundation of FIG. 1 and contains the mutual arrangement of the building structures: pillar supports 1, beams 2, soil foundation 3, floor slabs 4, blind areas 5, building walls 6, waterproofing 7. FIG. 3 shows an example load circuit; in FIG. 4 design scheme of the moment arising in the beam 2 from the action of the load. In FIG. 5 shows an example of a modular foundation for a residential building (cottage).

 New features of a modular foundation with movable supports, combining both the underground part (pillar supports) and the above-ground basement, unlike the prototype, allow simultaneously with the displacement of the foundation supports in a certain calculation limit, simplify the design, fulfill the foundation of a building of any configuration from one element to get rid of the device of additional foundation supports and ground structures in the places of installation of sedimentary and temperature joints, without changing the position of the structures and violation of the calculation In this scheme of the aerial parts, new differences are acquired that clearly do not follow from the achieved level of technology.

5 кг/см², где P расчетное сопротивление материала конструкции; M расчетный момент от действующей нагрузки; W расчетный момент сопротивления сечения конструкции.The displacement of the pillar supports is carried out as necessary during the design and production of work within the limits determined by the calculation. For example, when performing the ground part of the foundation from standard foundation wall blocks with a section of 40 • 60 cm, where 60 is height / and 2.4 m long in consoles 50 cm, evenly distributed load of 6 t / m, according to the formula RM / W we get P

5 kg / cm ² , where P is the design resistance of the material of the structure; M is the calculated moment from the current load; W the design moment of resistance of the cross section of the structure.

2,5 кг/см².If we accept these data for the calculation of a single-span non-console beam according to the prototype, we obtain R

2.5 kg / cm ² .

 Therefore, the design of the modular foundation in the given example allows you to shift the pillar supports in relation to each other in the limit determined by the calculation, to combine them into one support during the design and production of works, which meets the goal, since the design is simplified, labor costs for building the foundation are reduced, the limits are expanded standards of permissible deviations for the construction of the foundation, use a wide range of materials for the construction of the ground part of the foundation: monolithic and concrete structures made of concrete and reinforced concrete (foundation beams, beams and girders, panels, bricks and other standard products manufactured by the construction industry).

 The design span of the ground structure of the beam decreases, the design forces from the current load are distributed more evenly in it.

 These significant differences can reduce the material consumption of the foundation and maintain its design bearing capacity.

For example, in the given example, as compared with the strip foundation with the dimensions in the plan of 10.1x10.1 m, the depth is 1.2 m from the planning surface of the earth around the foundation, the concrete savings will be 15-16 m ³ , that is, regardless of the depth of the foundation, the volume of concrete its construction will be halved.

 The ground part of the foundation beam replaces the base of the building completely when it rests on the support pillars at the level of the planning mark around the foundation.

 When building a foundation with basements or with a slope around it of the terrain, the saving of materials and labor increases.

 The modular foundation allows the construction of residential houses, cottages and industrial and commercial buildings of any configuration in terms of using one type and size of the product in its ground part. Almost one 2-cantilever beam, which due to its simplicity can be made monolithic in place of concrete and other materials.

 This factor allows reducing transportation costs for the transportation of precast concrete products, which are usually not produced in rural areas.

 New design features are significant, as they provide the achievement of the goal.

Claims (1)

 The modular foundation, including the underground part in the form of supports and the ground part in the form of a double-beam beam, characterized in that the supports are displaceable, and the ground part forms a basement part.

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