JPS58127835A - Foundation structure - Google Patents

Abstract

PURPOSE:To easily construct a foundation without non-uniform settlement by a method in which PC steel materials are thrust through sheaths into a foundation for basement and a foundation for an overkaying structure and integrally combined with them by post tensioning so as to apply a prestress. CONSTITUTION:Sheaths 2 to be pierced with PC steel materials are buried in sidewise direction and plural precast reinforced concrete walls 1a-1m are integrally combined by post-tensioning work to form a foundation 1 for basement. Then, In the foundation 3 for an overlaying structure in which the sheath 2' to be thrust with PC steel materials is butted with the exposure on the ground of the sheath 2 of the foundation 1 for basement, PC steel materials 4 are pierced through both the sheaths 2 and 2', and then integrally combined with them by post-tensioning work so as to apply a prestress. Thus, foundation structure can be obtained.

Description

[Detailed description of the invention] This invention relates to basic structures.

Conventionally, in the case of a house with a structure where a part of the building is underground, a structure has been adopted in which, in addition to the basement structure, a shed base is placed adjacent to the basement structure to support the structure of the shed only. As a result, problems such as uneven settlement occurred due to the difference in ground bearing capacity between the part where the basement was located and the part with only the shed.

Therefore, an object of the present invention is to provide a foundation structure that does not cause uneven settlement and is easy to construct.

An embodiment of this invention is shown in FIGS. 1 to 1g4. In other words, this foundation structure has PC
A plurality of walls 1a made of precast reinforced concrete in which sheaths for passing C steel are embedded.

lb, .
Fabric base I with PC steel extension sheath 2' buried in the longitudinal direction! 3, and the PC@ expansion insertion sheath 2 and i arranged at the base sl of the base sl
PC2 steel rod insertion base 2' of ll distribution base iI3,
Insert the PC steel sheath 2 so that 2' are butted against each other.
The bottom surface of the pre-distribution foundation 3, which faces one end of ', is joined to the above-ground protruding wall surface of the basement combination foundation l, which one end of the sheath 2 for inserting a PC steel rod faces, and the basements abut against each other and communicate with each other. The PC steel rod insertion sheath 2, 2'tIcPc steel rod 4, 4t of the combination foundation 1 and cloth foundation 3 is inserted, one end of the COPC steel rod 4 is fixed, the other end is tightened with a hydraulic jack, etc., and screwed etc. At the same time, a prestress is applied in the tension direction of the PC steel rod 4.4 while the basement combination foundation 1 and the cloth foundation 3t are integrated.

The pre-distribution foundation 3 may be formed of cast-in-place concrete, or may be formed of precast reinforced concrete formed in advance at a factory or the like.

In Figures 2 and 3, 5.6 and 7°8 indicate the 1 m wall made of precast reinforced concrete.

1b and reinforcing bars placed inside the cloth foundation 3.

With this configuration, foundation construction for a partially underground type of house can be carried out separately for the foundation 1 for the basement and the foundation for the shed (in this example, the cloth foundation 3). Combined use group 118ii1 with brecasting reinforced concrete 'J
- Sheath 2 for inserting a PC steel rod formed by post-tensioning and used for the post-tensioning method
Since the foundation for the shed is integrated with the foundation for the basement l using a part of Sufficient prestress is applied between .3 and the ground bearing capacity becomes uniform and uneven settlement 1 can be prevented.

As described above, the foundation structure of the present invention includes a basement combined use foundation part using the boss tension construction method, in which a plurality of precast reinforced concrete walls are embedded with sheaths for inserting PC copper material in the lateral direction along the wall surface, and A sheath for passing through the PC steel material was buried for the above-mentioned purpose, and one end surface of the PC steel material was joined to the wall surface of the foundation for the basement together with the PCmCm sheath for passing through the basement. The base part for the basement is inserted into the sheath for inserting the PC steel material of the foundation part for the basement and the foundation part for the shed which are butted against each other, and the base part for the basement and the foundation for the shed are integrated. This makes it easy to construct foundations for houses with thin basements, and also provides sufficient prestress to the foundations used for basements and the foundations for sheds. This has the effect of making the ground bearing capacity uniform and preventing uneven settlement.

[Brief explanation of the drawing]

Figure WJ1 is a schematic layout diagram showing one embodiment of this invention.
The figure is a partial vertical cross-sectional view of the foundation used for the basement, FIG. 3 is a vertical cross-sectional view of the cloth foundation, and FIG. 4 is a perspective view of the exterior. 1.Foundation for basement, 2.2', sheath for inserting PC steel rod, 3.Fabric foundation (base for shed 1!tflll), 4...
PC steel bar, 5.6.7.8...Reinforcement bar

Claims (1)

[Claims] A sheath for inserting a PC steel material in the lateral direction along the 11th plane.
A foundation combined with a basement formed of multiple precast reinforced concrete walls with t11 crotches using the boss tension construction method, and a sheath used with a T-moat for insertion of PC copper material in the longitudinal direction, and this sheath for insertion of PC steel material and the foundation combined with the basement. A foundation for a shed, whose one end surface is joined to the wall surface of the foundation combined with the basement so that the sheath for inserting the PC steel material of the A foundation structure comprising a PC steel material that is inserted into a sheath for inserting a PC steel material in a building foundation part and is integrated with the foundation part used for a basement and a curved shed foundation part to provide a bracing stress.