JPH0430024A - Basement made of precast concrete - Google Patents

Abstract

PURPOSE:To prevent the breakage of anchor braces by providing a basement wall body connected with both upper and lower ends of wall panels by a steel beam under the ground, protruding anchor braces buried in the wall panels in no contact with the beam to the inside of the wall body, and burying them in base concrete. CONSTITUTION:A lower beam 1 is installed on the ground. Multiple wall panels 2 made of precast concrete are installed on the lower beam 1, the wall panels 2 are connected to each other, and the wall panels 2 are connected to the lower beam 1. An upper beam 4 is installed on the upper end of the wall panels 2 and connected to the wall panels 2 to construct a basement wall body 5. The inside soil is discharged while the wall body 5 is pressed into the ground, and it is sunk to the preset depth. Anchor braces 21 buried in the wall panels 2 are protruded to the inside of the wall body 5 and buried in base concrete 6.

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL FIELD OF APPLICATION The present invention relates to basements using Brewing Yast concrete wall panels.

Conventional technology Traditionally, a bottomless hollow basement wall was constructed in advance by assembling precast concrete wall panels above ground.
The construction method of draining the soil below the basement wall and causing the basement to settle, or forcing the basement wall to sink while gradually removing the soil inside is already known. In such a construction method, after installing the basement walls, it is necessary to install or pour concrete foundation slabs at the bottom of the basement walls to integrate them with the walls. Conventionally, anchoring reinforcements are welded to steel bars connecting the lower ends of the wall panels, and the anchoring reinforcements are buried in foundation concrete to integrate them with each other.

Problems to be Solved by the Invention However, when welding anchor bars to beams as described above, on-site welding increases the number of man-hours for on-site construction, and the beams are exposed in the soil. Therefore, there is a problem in that rust is likely to occur, and this rust is transmitted to the anchoring streaks, causing the anchoring streaks to break. This invention aims to solve these problems.

Means for Solving the Problems In order to solve the above problems, in this invention, a basement wall body in which the upper and lower ends of a precast concrete wall panel are connected by steel beams is installed underground, and a wall is installed inside the wall panel. The present invention is characterized in that the fixing bars, which have been buried in advance without contacting the steel beam, are buried in the foundation slab concrete so as to protrude inward from the wall.

According to the configuration of the present invention, the anchoring bars are embedded in the wall groove in advance, and the protruding portions thereof are embedded and integrated into the foundation slab concrete cast on site.

Furthermore, since the fixing bars are attached without coming into contact with metal members such as beams, rust on the metal parts will not be transmitted.

Embodiment Figure 9 and subsequent figures show the construction method for this type of basement according to the construction order. First, as shown in Figure 9, the lower beam (1) is installed on the ground, and then this lower beam is installed. Install precast concrete wall panels (2) and (3) on top of (1) as shown in Figure 10, and install these wall panels (2) and (3).
) are interconnected, and each wall panel (2) (3) is connected to the lower beam (1). Furthermore, each wall panel (2)
(3) Install the upper beam (4) at the upper end and connect them to each other to construct the basement wall (5) (Fig. 11).

Next, as shown in Fig. 12, the basement wall (5) is allowed to sink while draining the soil below and inside it, or the soil inside is drained while the basement wall (5) is press-fitted, and the basement wall (5) is drained to a predetermined level. After sinking to a certain depth, a foundation slab concrete (6) is poured at the bottom as shown in Fig. 13.

Figure 2 shows wall panels (2) and (3); (2)
(3) shows the panel at the diametrical part, and (3) shows the panel at a part of the corner. These wall panels (2) (3) are made of precast concrete produced in advance in a factory, and steel boxes (8) (8) are embedded in the four corners of their inner surfaces. As shown in FIGS. 3 and 4, these boxes (8) have openings that are open to the inside of the wall (5), and two sides (9) and (10) that are connected to the panel (2) ( 3) is exposed on the side end surface and the top or bottom end of those sides (9) (
10), bolt holes (11) (11) are formed, respectively. Then, as shown in Fig. 5, the side edges (9) of the side end faces of the adjacent panels (2) and (3) are overlapped with each other and inserted into their bolt holes (11).
At (12), each wall panel (2) (3) is connected.

As shown in Figure 1, the lower beam (1) is made of H-beam steel with its flanges (13) parallel to the inside and outside of the wall, and the upper surface of its web (14) is attached to the wall. Install the panels (2) and (3), and connect the bottom edge (10) of the box (8) at the bottom corner of the panels (2) and (3) to the web (14) with the pole (15). ing. A cutting edge beam (16) having a blade-shaped cross section is integrally fixed to the lower surface of the lower beam (1). On the other hand, the upper beam (4) is connected to the lower beam (1
) is installed in the same direction as the H-shaped steel whose width dimension is smaller than that of the panel (pol) (). 1B)
Concluded. This box (8) will later be filled with mortar.

At the lower end of the inner surface of the wall panel (2>(3), there is a recess (20
) is formed, and as shown in FIG.
), the fixing strip (21) of the present invention protrudes in a roughly U-shape when viewed from the side. This fixation muscle (21
) are arranged at intervals in the left and right direction.

In addition, the ends of the anchoring strips (21) are attached to the wall panels (2) and (3).
As shown in FIG. 1, each of the beams is bent vertically upward and buried without contacting the lower steel beam (1). The foundation slab concrete (6) is poured so that its end enters the recess (20).

A horizontal plate (23) is fixed in advance to the upper end of the flange (22) (22) of the lower beam (4).
The base (25) is placed with (24) parallel to the top and bottom,
Pol) (26) is fixed.

Figure 6 shows the structure of the joint between the six panels (2) and (3), and the liquid waterproofing material (3) is placed in the center of the joint.
1), water-swellable sealant (32) is applied to the opening on the outer wall side of the joint, and a general non-water-swellable sealant (32) is applied to the opening on the inner wall side via back-up material (33). It is filled with a sealing material (34). (35) is a heat insulating board attached to the outer wall surface of panels (2) and (3).

Figure 7 shows the above-ground structure at the upper end of the basement wall. A ground floor framework (37) consisting of a C channel is attached to the top surface of the foundation (25).
An external wall panel (38) of the ground floor is fixed to the outside of the building (37). Then, the outside of the base (25) and the upper beam (4) between the lower end of this outer wall panel (38) and the upper end outer surface of the basement wall panels (2) and (3) is connected to the substrate (39).
A panel (4) with many tiles (40) pasted on its surface.
1). In this case, a waterproof sheet (42) is provided on the outside of the base (25) and the upper beam (4), and a tile panel (41) is installed on the outside with a heat insulating material (43) such as foamed urethane resin. There is. To install this tile panel (41), a blank part (44) (44) is provided by partially removing the tile (40), and the board (39) in this blank part (44) is attached to the base (25) and Bolt (46) to screw hole (45) (45) in upper beam (4)
) After fixing with (46), this blank! (44) is filled with tiles (40). In addition, the web of the upper beam (4) (
A mortar filling hole (47) is formed in the panel (17), and mortar (48) is injected through this filling hole (47) to form a mortar (48) between the upper end of the panel (2>(3) and the upper beam (4). 4
8) and integrate them with each other.

At this time, the mortar (48) is also filled in the upper surface of the web (17).

Figure 8 shows the footings of the panels (2) and (3) and the cloth foundation (50) in the case where the cloth foundation (50) of the ground floor is located outside the upper ends of the basement wall panels (2) and (3). (51) are integrally connected to each other by connecting rods (52) (52).

Effects of the Invention As described above, in this invention, the anchoring bars that integrally connect the wall panel and the foundation concrete are buried in the wall panel in advance, so there is no need for on-site welding. Since it is buried without touching the exposed lower steel beam, even if mackerel occurs on the lower beam, it will not reach the anchorage bar. Therefore, it is possible to prevent separation of the wall panel and the foundation slab concrete due to breakage of the anchor reinforcement.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of the main part of a basement in an embodiment of the present invention, FIG. 2 is a perspective view of the wall panel, FIG. 3 is an enlarged perspective view of the lower end corner of the wall panel, and FIG. , FIG. 5 is an enlarged cross-sectional view of the connecting portion of the wall panels, FIG. 6 is an enlarged cross-sectional view of the joint between the wall panels, and FIG. 7 is the upper end of the wall panel. Figure 8 is a vertical cross-sectional view showing the structure of the installation of tile panels, Figure 8 is a vertical cross-sectional view showing the connection structure between the wall panel and the fabric foundation, Figures 9 to 11 are the basement construction method. A perspective view showing the order of construction, Figure 12 and Figure 1.
FIG. 3 is a longitudinal sectional view as well. (1)...Lower beam, (2)(3)...Wall panel, (
4)...Top beam, (6)...Foundation slab concrete, (
21)...Anchor muscle. Patent Applicant Sekisui House Co., Ltd. Agent Patent Attorney Hisayuki Tarumoto Figure 8 Figure 12 Figure 13 Figure 10 Figure 9

Claims (1)

[Claims] A basement wall in which the upper and lower ends of precast concrete wall panels are connected by steel beams is installed underground, and anchorage bars that have been previously buried within the wall panel without contacting the steel beams are installed in the wall. A precast concrete basement characterized by protruding inward from the body and buried in foundation concrete.