JPS6215427B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved concrete tank that is easily assembled on site from precast concrete units (hereinafter referred to as "precast concrete panels"). In particular, the present invention relates to concrete tanks made from elongated precast concrete panels whose concrete core walls have an exterior surface of steel sheets. Furthermore, the present invention
The present invention relates to a method of joining adjacent precast concrete panels to form an integral assembly with reliable water seal joints.

Concrete tanks have traditionally been constructed from the ground up at the work site. This operating method has the disadvantage that the work may be delayed due to the weather being unsuitable for both the material and the work. Efforts have therefore been made to provide a method of transporting and transporting precast concrete panels that can be constructed at a suitable time and place to a work site, and can sometimes be assembled indoors.

The pre-shaped panel includes a sheet metal cladding permanently adhered to one side of the panel. The cladding is provided with a plurality of parallel elongated grooves that create a place where mortar can be filled to form an external coating or wall on the upright panel. Typically, these pre-cast panels are formed by water-based concrete deposited onto a sheet steel diaphragm in which parallel longitudinal grooves have already been formed. The panels are of a length determined by the height of the tank intended to be constructed.

While the advent of precast concrete panels has simplified the construction of prestressed concrete tanks on-site, the problem of joining and sealing these concrete units together has arisen.
U.S. Pat. No. 3,280,525 shows a technique for joining and sealing precast panels together in which half grooves are formed on both edges of each panel, the grooves having a similar cross-section but It can be fixed in place by inserting a metal key plate with slightly smaller dimensions so that it fits properly when operated in place.

The first object of the present invention is to have a simpler structure,
The objective is to provide a concrete tank made of precast panels that is more economical and more reliable.

It is also an object of the present invention to provide a method of manufacturing a concrete tank that further reduces the expense required to make and operate a separate cover plate such as that used in U.S. Pat. No. 3,280,525. It is.

Another important object of the invention is to reduce leakage from inside the tank and to reduce sealing and the work required to perform this sealing.
The goal is to reduce the number of sealing elements in the joints between adjacent concrete panels.

These and other purposes have a core wall consisting of elongated precast concrete panels having metal sheets formed with longitudinally downward parallel grooves cut into the exterior surface. This has been achieved in precast concrete tanks. The panel also includes two transverse sheet metal flanges parallel to the elongated sides of the panel and extending outwardly from the panel. The panels are assembled side by side at regular intervals. The metal sheet flanges on conventional adjacent panels of FIGS. 1-3 overlap each other. The overlapping flanges are then joined together, with the joint sealed using sheet metal screws and a resilient compound. 5th to 10th
An advantage of the invention shown in the figures is that a separate cover plate is not required, since the metal surface of the joint, which is filled with filler concrete 30, is the metal surface on the panel. US Patent No.
No. 3280525 requires approximately 1.5 times as much elastic material and labor due to the two joining lines. The present invention significantly reduces leakage from the tank.

The present invention is highly satisfactory in that it eliminates expensive cover plates, reduces joints, and reduces the possibility of leakage. In the present invention, by providing a metal sheet diaphragm with a bond set inside the precast concrete, the finished prestressed tank is made more reliable and satisfactory.

The present invention achieves these and other objects by means of a panel having a plurality of elongated metal sheets on its exterior surface. At least one of the sheets has parallel, longitudinally extending, downwardly cut grooves, and each sheet has at least one lip extending from the inside of the metal sheet into the precast concrete. ing. The lips of adjacent sheets are tied together to form a joint within the precast concrete. The advantage of such an arrangement is that, in addition to the fixing effect achieved by the grooves cut downward into the metal sheet, the bond is fixed firmly in the precast concrete, fixing the metal sheet to this concrete. . The bond fastened to the precast concrete prevents the metal sheet from peeling off from this concrete. This minimizes the tendency of the metal sheet diaphragm to separate from the edges of the panels, thereby promoting bonding between and bonding adjacent panels together. Minimize tank leakage at location.
At locations inside the edges of the panels, the connections secure the sheets together and secure them to the precast concrete.

Furthermore, the above-described joining techniques are not only useful for joining metal sheets in making up precast concrete panels, but also provide more reliable and economical pre-stressing for joining adjacent panels. It is also useful for making tanks with

One object of the present invention is to reduce the use of sealants in joining adjacent precast concrete panels together.

Another object of the invention is to create panels and tanks using a single tethering device, thereby reducing cost and complexity.

Another important objective of the invention is to provide a tighter and more watertight bond between adjacent panels to reduce leakage from inside the tank.

Yet another object of the invention is to provide a connection between adjacent panels without the need for metal sheet screws to pass through the metal sheets.

These and other objects of the invention are achieved by a prestressed tank having a core wall consisting of an elongated panel of precast concrete with parallel longitudinally extending downwardly cut grooves on the outer surface. be done. The panel includes a metal sheet flange parallel to and extending laterally from the elongated side of the panel. The flange has a flange lip at the outermost line of the flange. The flange lip extends outwardly from the tank in a direction generally perpendicular to the panel. The panels are assembled in side-by-side relationship and adjacent lips are folded tightly together to form a watertight seal, joining the adjacent panels.

In the prior art example of FIG. 1, reference numeral 10 designates a concrete core wall formed from two precast concrete panels 12 and 14. Each panel 12 and 14 has an outer surface of a sheet metal 16 provided with a plurality of longitudinally parallel and downwardly cut grooves 18. Each panel 1
Metal sheet (or steel sheet) on 2 and 14
16 extends past the edge of the panel to form a flange 20 on panel 12 and a flange 22 on panel 14. These flanges are parallel to the vertical sides of panels 12 and 14 and extend laterally outwardly therefrom. panel 1
2 and 14 are spaced 24 apart.

Referring to the prior art embodiment of FIGS. 2 and 3, flanges 20 and 22 on plates 12 and 14, respectively, overlap each other and are held together by sheet metal screws 26. The combination is filled with an elastomeric material 28 and the entire joint between panels 12 and 14 is filled with filler concrete 30. The elastomeric material used to seal the joint is silicone rubber, polysulfide, or the like.

After the core wall has been erected as previously described, a cement intermediate wall 32 is formed over the exterior steel facing the panel. Pneumatically injected mortar is used to form an external coating or wall that tightly seals the longitudinal parallel downward grooves 18 in the metal sheet facing the panel. After the intermediate wall 32 has been formed, the tank is prestressed by a wire 34, which is further covered by a cement cover 36.

In the conventional example shown in FIG.
This is the same diagram as FIG. 1, except that is added inside each panel or at the panel edge. Each panel 12 and 14 includes one or more metal sheets 16a, 1
6b, 16c, 16d and 16e. A sheet 16b is provided at the edge of the panel 12, and a sheet 16d is provided at the edge of the panel 14.
are provided, but no downward grooves are cut in any of them. The lateral extensions of sheets 16b and 16d form flanges 20 and 22, respectively. Adjacent sides of the metal sheet are provided with lips that are joined together to form a joint 11 and are fastened to precast concrete.

Referring to the partially enlarged views of the arrangement of the invention in FIGS. 5-8, the metal sheet 16 is provided with adjacent, abutting upright lips 15 and 17. To form the joint, the adjacently abutting upright lips 15 and 17 are joined together by a seaming operation. The joint may be formed by using a seaming machine as disclosed and described in US Pat. No. 3,120,828. More specifically, the machine used here to form the seam is a ROOF RUNNER TM machine from Butler Research, Kansas City, Missouri, USA.
machine). The seaming machine is placed at one end of the upright lips 15 and 17 and its support is movable along the lip. A series of rolls and reversing rolls tightly fold the lips together and join adjacent sheets by folded connections 13 as shown in FIG. On a second pass through the splicing device, the folded joint 13 is folded again as shown in FIG.

Referring to FIG. 6, a preferred lip structure is shown. This lip structure is a protruding lip 2
1 and a receiving lip 19, which are pre-rolled in a conventional manner. The protruding lip 21 is made of bent metal.
The receiving lip 19 is folded back to surround the protruding lip 21, forming an inverted V shape with an angle of about 30 degrees. The advantage of such a lip structure is that a single pass of the piecing machine forms the double fold shown in FIG.

9 and 10 illustrate the method of the present invention for joining precast panels.

Referring to FIGS. 9 and 10, the flange 2
0 and 22 are provided with flange lips 23 and 29, respectively, which extend outwardly from the tank in a direction generally perpendicular to the panel. The panels 12 and 14 are erected with a space between them. A channel-shaped splice member 16f is fitted between panels 12 and 14. Splice member 16f is a sheet metal and has two upright sides 25 and 27. The side portion 25 abuts the flange lip 23;
The side portion 27 abuts the flange 29. proof·
Using the Runner TM machine (described above) in a manner similar to that previously described, a tightly folded joint 31 is formed. The entire gap between panels 12 and 14 is filled with filler concrete 30.

An unillustrated embodiment of the invention is an array of panels 1
2 and 14, the flange lips 23 and 29 are adjacent and form a single seam for joining adjacent panels.

In most cases the metal sheet diaphragm is located on the outer surface of the structure. However, depending on workplace conditions, it may not be possible to make an external connection or an internal stop where the metal sheet diaphragm is placed on the internal surface of the structure. Such a case can be accommodated by reversing the direction of the joint.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a conventional concrete tank in cross section. Figure 2 shows line 2-2 in Figure 1.
FIG. FIG. 3 is a cross-sectional plan view of a completed conventional tank. Figure 4 shows
FIG. 2 is a partial cross-sectional view of a conventional concrete tank. FIG. 5 is a lateral plan view of a pair of adjacent metal sheets of the present invention and a lip provided before the sheets are joined together. FIG. 6 is a cross-sectional plan view of a preferred embodiment of a pair of adjacent metal sheets of the present invention and a lip provided before the sheets are joined together. FIG. 7 is a cross-sectional plan view of a pair of adjacent metal sheets showing the joining portion in the present invention. FIG. 8 is a cross-sectional plan view of a pair of adjacent metal sheets illustrating a preferred splice of the present invention. FIG. 9 is a partial cross-sectional view of a concrete tank showing a splicing member fitted between the flange lips of adjacent panels in accordance with the present invention. FIG. 10 is a partial cross-sectional view of a concrete tank showing an improved member for securing adjacent panels in accordance with the present invention. Explanation of symbols, 12, 14... Precast concrete panel, 15, 17, 19, 21... Lip, 16... Metal sheet, 20, 22... Flange,
30...Filled concrete part.

Claims (1)

Claims: 1. A metal sheet 16 having at least one longitudinally extending narrow groove 18 on its surface and having a width narrower than the width of the metal sheet, so that: Elongated flanges 20, 22 consisting of a portion of the metal sheet 16 on both sides of the concrete layer
a plurality of precast concrete panels 1 having a concrete layer adapted to form a
2, 14, and the flanges 20, 22 of the metal sheet 16 are
along each outer edge and the metal sheet 16
The lip 15,1 extends substantially at right angles to the
7, 19, 21, and the lips 1 of the adjacent flanges 20, 22 of the metal sheet 16
5, 17; 19, 21 are formed by folding tightly together to make them watertight; a plurality of precast concrete panels 12 assembled next to each other;
14; and a newly cast filler concrete section 30 between and flush with the concrete layers of adjacent panels 12, 14. 2. The tank according to claim 1, wherein the flange lip of the metal sheet extends in a direction substantially perpendicular to the metal sheet toward the inside of the tank. 3. The tank according to claim 1, wherein the flange lip of the metal sheet extends toward the outside of the tank in a direction substantially perpendicular to the metal sheet. 4. Pour concrete onto the metal sheet 16 having at least one narrow groove 18 extending in the longitudinal direction on the surface so as to have a width narrower than the width thereof;
Thereby, on each side of the concrete layer, elongated flanges 20 each consisting of a portion of a metal sheet,
prefabricating a plurality of precast concrete panels 12, 14 forming 22; Adjacent lips 15, 17; 1
9 and 21 are tightly folded together so as to be watertight; and then, new concrete is poured between the concrete layers of each adjacent panel and on the same plane as the filled concrete part 30. A method of manufacturing a tank, comprising: forming a tank;