JPH0326738B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of constructing a foundation beam with double slabs.

(Prior Art) and (Problems to be Solved by the Invention) Generally, in a design where the foundation is a double slab, as shown in Fig. 6, pressure plate a, underground beam b,
The work was difficult because reinforcing bars and concrete were placed in the order of floor slab c.

In such a case, even if only the underground beam is precast, it is difficult to integrate it with the underground beam, which is not preferable from a structural standpoint.

In addition, underground beams are generally large and have a large cross section, so even if they are precast, they are heavy and difficult to transport and erect.

(Means for Solving the Problems) The present invention has been proposed to solve the above problems, and includes a structure in which ribs are buried and hook portions are bent at the upper and lower projecting ends of the ribs. A pair of inner and outer precast concrete vertical plates are installed oppositely on the pressure plate part, and upper and lower beam main reinforcements are arranged at the hook part and the intermediate part of each of the ribs on the upper and lower sides of both the inner and outer vertical plates, respectively, Thereafter, concrete is poured between the inner and outer vertical slabs and over the pressure plate portion, and then an upper slab is constructed.

(Operations) and (Effects of the Invention) As described above, the present invention provides a platform that doubles as a formwork for constructing a pair of inner and outer foundation beams, in which reinforcing bars are buried and hooks are curved at the upper and lower end protrusions. Cast concrete vertical slabs are made in advance, and a pair of the same vertical slabs, one inside and one outside, are installed oppositely on a pressure board, and at the upper and lower parts of the vertical slabs, the hooks of the above-mentioned internal and external ribs, and between the upper and lower inner and outer hooks. After arranging the upper and lower beam main reinforcements, concrete was poured between the vertical slabs and pressure plates of the above-mentioned inner and outer pairs. A foundation beam is constructed of concrete, and the foundation beam is integrated with the pressure plate.

During this time, the vertical plates for the inner and outer sides also serve as the formwork for the foundation beam, eliminating the need for formwork.
Construction is significantly simplified.

Next, in the present invention, by constructing an upper slab on top of the foundation beam, a structurally reliable foundation structure in which the pressure plate, the underground beam, and the upper slab are integrated is constructed.

(Example) The present invention will be described below with reference to the illustrated embodiments.

A and A' are vertical precast concrete slabs with one pair of inner and outer sides, in which reinforcing bars 1 on both the inner and outer sides of the foundation beam are buried, and the upper and lower protruding ends of each reinforcing bar 1 are bent at 135 degrees.
Upper and lower hook portions 1a and 1b are provided.

After the preparation for concrete pouring of the pressure plate part is completed, the above-mentioned pair of precast concrete vertical plates A, A' are set oppositely to the pressure plate part, and the upper end hook parts 1a, 1a of each reinforcing bar 1, 1 are installed. , and both hook parts 1
Arrange upper beam main reinforcement 2 between a and 1a, and
A lower beam main reinforcement 3 is arranged between the lower end hook portions 1b, 1b of each of the cost reinforcements 1, 1 and both hook portions 1b, 1b,
In addition, between the main reinforcing bars 3 of the lower beam, groove-shaped reinforcing bars 4 connecting the inner and outer reinforcing bars 1, 1 are connected, and then concrete 5, 6 is poured between the vertical plates A, A' of the above-mentioned inner and outer pairs, and in the pressure plate part, respectively. and thus said both vertical plates A,
The foundation beam constructed from A' and the poured concrete 5 and the pressure plate B constructed from the poured concrete 6 are integrated. (See Figure 1)
Note that 7 in the figure is a slab reinforcement arranged on the pressure plate B.

During this time, the pair of inner and outer precast concrete vertical plates A and A' also serve as formwork for pouring concrete for the foundation beam, eliminating the need for formwork work and greatly simplifying construction.

Next, channel reinforcements 8 connecting the inner and outer reinforcements 1 are connected between the upper beam main reinforcements 2, and slab concrete 9 is placed on the foundation beam to construct the upper slab C.
(See Figure 2) 10 in the figure is a slab line.

Note that a PC board may be used for the upper slab.

In this way, a foundation is constructed in which the pressure plate B, the foundation beam, and the upper slab C are integrated.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of drawings]

Figures 1 and 2 are longitudinal sectional views showing the steps of an embodiment of the construction method for a foundation beam with double slabs according to the present invention, Figure 3 is a plan view showing the arrangement of the foundation beam, and Figure 4 is a plan view showing the arrangement of the foundation beam. Figure 5 is an exploded view of the foundation beam, Figure 5 is a slope view of the precast concrete vertical version, and Figure 6 is a vertical cross-sectional view of the foundation beam with double slabs constructed using the conventional construction method. A, A'... Precast concrete vertical version,
B...Pressure plate, C...Upper slab, 1...Ribbon,
1a... Hook part, 2... Upper beam main reinforcement, 3... Lower beam main reinforcement, 5... Concrete poured for foundation beam part,
6... Concrete poured for the pressure plate section.

Claims (1)

[Claims] 1. A pair of inner and outer precast concrete vertical plates, in which reinforcing bars are buried and hooks are bent at the upper and lower protruding ends of the reinforcing bars, are installed oppositely on the pressure plate, and Arranging upper and lower beam main reinforcements at the hook part of each of the ribs and the intermediate part thereof, respectively,
A method for constructing a foundation beam with double slabs, characterized in that concrete is then poured between the vertical slabs on the inner and outer surfaces and over the pressure plate portion, and then an upper slab is constructed.