JPS6145021B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to piles for side walls when building relatively shallow basements of about one floor underground.

First, the conventional technology will be described.

Conventionally, there are two methods for constructing relatively shallow basements.

One of them is a well-known method called the dry method, in which if there is excess land around the site, a hole with an area larger than the area of the basement is dug, and after the basement is completed, the surrounding area is filled with soil. .

The other method is a well-known method called the wet method, which is used when there is no extra land nearby or when constructing a basement near the boundary line with the neighbor. This method involves embedding steel plate piles or reinforced concrete plate piles along the boundary line and digging inside to create a basement.

In the case of steel plate piles, it is also possible to drive the pile from the top with an air hammer, but this also generates noise and may cause vibrations due to impact, which may damage surrounding buildings. Therefore, a method has been adopted in which piles are inserted into pile holes that have been dug in advance without vibration. However, if a deep hole is dug in the ground for the pile, there is a risk that the surrounding earthen wall will collapse and the hole that has been painstakingly dug will be buried. In such cases, as a means to prevent the hole from filling up, a clay solution made by dissolving clay in water or a grout clay solution made by dissolving clay and cement or silicon in water are poured into the hole. This clay liquid, grouting clay liquid, is also injected into the unfinished hole during digging work. Due to its viscosity, such clay liquid and grout clay liquid are very slowly sucked into the surrounding earthen walls. Particularly in the case of reinforced concrete piles, grouting clay solutions are preferred. If clay solution or grout clay solution is injected while digging a hole, the clay solution or grout clay solution will remain in the hole after the hole is completed, but when a pile is inserted, it will enter the gap between adjacent piles. When soaked and dried, it acts as a sealing adhesive.

Various methods of digging square holes for embedding piles have already been put into practical use. For example, JP-A-48-19010
The method described in the publication is an example of a method that has been put into practical use, but the method is an excavation tool that is constructed by connecting a pressurized water supply pipe and a grout supply pipe to a flat box-shaped body equipped with an injection hole at the tip of the shoe. erected on the required ground,
Pressurized water is supplied to the main body via the pressure water supply pipe and sprayed from the tip shoe to insert the excavating tool to a required depth, after which water supply is stopped and grout is applied to the main body via the grout supply pipe. After the excavating tool is pulled up while the grout is injected from the tip foot, the pile is press-fitted into the ground where the excavating tool was pulled up. The substantially rectangular hole into which the pile according to the present invention is initially press-fitted is dug by such well-known means.

It is also well known that piles are arranged in series in the holes dug in this way and lined up without gaps. In addition,
In general, concrete piles have internally threaded cylinders embedded in two places on the left and right in order to screw together eye bolts (bolts with eye-shaped heads) at the upper end. The present invention provides a pile that is advantageous for burying such piles one after another.

Furthermore, a method is also adopted in which a circular hole is bored in the ground, a deep trench is excavated using the boring hole as the starting point, a frame of reinforcing bars is placed in the trench, and then concrete is poured. However, this method requires cast-in-place concrete, and in order to prevent the excavated ground from collapsing, the trench is usually filled with muddy water (also called clay water or bentonite water), so concrete is poured into the muddy water. To improve quality, it is necessary to increase the wall thickness and the amount of concrete itself. Therefore, the cost is high,
The waterproofing effect is also significantly lower than that of concrete piles produced in factories. Furthermore, although the connection to the cast-in-place concrete plate is made by pouring concrete, special construction is required to prevent water leakage from the connection point, which is time-consuming.

The present invention is aimed at speeding up such basement construction, and as the first step in basement construction, piling material buried in the soil is directly used as the basement side wall, and the removal process of the piling material and conventional basement side wall construction are The purpose is to provide a pile for side walls that can omit a process.

The pile for side walls of a basement according to the present invention will be explained based on the drawings.

1 is a concrete pile in the form of an elongated plate, and its dimensions are, for example, 20 cm thick, 55 cm wide, and 4.7 m high.
belongs to. 2 is a trapezoidal protrusion formed along the longitudinal center line of one side of the pile 1, and the trapezoidal protrusion 2 is further provided with a trapezoidal protrusion 2 extending vertically along the center line of the top surface of the trapezoidal protrusion 2. A belt-shaped sealing plate 3 made of hard synthetic resin and having a uniform thickness is integrally provided in a protruding manner. 4 is an inverted trapezoidal concave line formed on the other side of the pile 1, and has a shape corresponding to the contour of the trapezoidal convex line 2; A tapered groove 5 is formed in the vertical direction along the groove, and the seal plate is fitted into the tapered groove 5. Also, one pile 1
When the trapezoidal convex strip 2 on one side of b and the inverted trapezoidal concave strip 4 on the other side of the adjacent same-shaped pile 1a are fitted together, the seal plate 3 and the tapered groove 5 come into contact with each other. The protrusion height of the seal plate 3 and the depth of the tapered groove 5 are related to each other so that a predetermined distance is maintained between the fitting surfaces of adjacent pile end surfaces.

Note that, like a normal reinforced concrete pile, internally threaded cylinders (not shown) for screwing in eye bolts are embedded near both left and right ends of the top surface of the pile 1. Then, an eye bolt is screwed into the internally threaded tube, and the central part of the wire, which has both ends hooked to both eye bolts, is suspended by a crane and inserted into a square hole dug in the ground.

Next, an example of use of the pile for a side wall of a basement according to the present invention will be explained.

First, one pile 1b suspended by a crane is placed in a square hole dug by known means and filled with grout clay liquid, and then a pile 1a of the same shape is placed adjacent to the pile 1b. .

At this time, the grout clay liquid is applied to both piles 1b and 1a.
caught in between. The sandwiched grout clay liquid hardens with the passage of time, becomes a seal plate 6, and maintains watertightness.

Similarly, a large number of piles 1, . . . , 1 are arranged in series to form a basement frame 7 as shown in FIG. Subsequently, the soil in the basement frame 7 is excavated, and the basement frame 7, that is, the piles 1, . . . , 1 are used as they are as side walls.

As described above, the basement sidewall pile according to the present invention has a trapezoidal protrusion 2 along the longitudinal center line of one side of the elongated plate-shaped concrete pile 1 to be driven into the ground, and a trapezoidal protrusion 2 along the longitudinal center line of the other side. An inverted trapezoidal concave strip 4 corresponding to the contour of the trapezoidal convex strip 2 is provided along the direction center line, and a seal of uniform thickness made of hard synthetic resin is provided along the center line of the top surface of the convex strip 2. A sealing plate 3 having the same outline as the sealing plate 3 along the center line of the bottom surface of the inverted trapezoidal grooved strip 4 is provided.
When a tapered groove 5 into which is fitted is provided, and the trapezoidal groove 2 on one side of one pile 1b is fitted with the inverted trapezoidal groove 4 on the other side of an adjacent pile 1a of the same shape. , the protrusion height of the seal plate 3 and the depth of the taper groove 5 are adjusted so that a predetermined distance is maintained between the fitting surfaces of adjacent pile end faces by the contact between the seal plate 3 and the tapered groove 5. It is something that is associated with

Therefore, when the trapezoidal convex strip 2 is placed close to the inverted trapezoidal concave strip 4, the hard synthetic resin strip seal plate 3 comes into contact with the tapered groove 5, so that the trapezoidal convex strip 2 is placed adjacent to the concrete part of one pile 1b. Direct impact contact between the concrete parts of the pile 1a is prevented, and the thickness between the two adjacent piles 1b and 1a is reduced when inserting the adjacent pile 1a. There is no difference in direction due to deviation.

Furthermore, due to the seal plate 3 fitted into the tapered groove 5, a predetermined gap is created between the inverted trapezoidal groove 4 and the trapezoidal ridge 2 and between the end faces of the adjacent piles 1b and 1a.

Of course, when using concrete piles as side walls of a basement, after placing the piles, excavate the soil surrounded by a large number of piles, and then use the upper and lower parts of the concrete piles to form the ceiling and floor of the basement. It is fixed to the upper horizontal beam and the lower horizontal beam.

In the side wall of a basement using the piles according to the present invention, adjacent piles are connected by the synthetic resin sealant 3 and sealant 6, so that the upper and lower parts of the piles are connected horizontally to the upper part of the ceiling. Even if they are fixed to the beam and the lower horizontal beam for the floor, even if relative displacement occurs between adjacent piles in the event of an earthquake, etc., the elastic deformation of the synthetic resin band-shaped seal plate 3 and the sealant 6 (The range of deformation is limited by the trapezoidal convex strips 2 and the inverted trapezoidal concave strips 4).
There is no possibility that the belt will be damaged or cracked, and water will not leak over a long period of time.

[Brief explanation of the drawing]

The drawings are for explaining the pile for the side wall of a basement according to the present invention, and FIG. 1 is an overall plan view of the assembled pile, FIG. 2 is a partially enlarged plan view of FIG. 1, and FIG. 2 is a sectional view taken along the line A-A in FIG. 2, FIG. 4 is a plan view of the pile alone, and FIG. 5 is a front view of FIG. 4. 1, 1a, 1b...Pile, 2...Trapezoidal convex strip, 3...Seal plate, 4...Inverted trapezoidal groove strip, 5...
...Taper groove, 6...Sealant, 7...Basement frame.

Claims (1)

[Claims] 1. A trapezoidal protrusion is placed along the longitudinal center line of one side of the elongated plate-shaped concrete pile to be driven into the ground, and a trapezoidal protrusion corresponding to the contour of the protrusion is placed along the longitudinal center line of the other side. A trapezoidal concave strip is provided, and a sealing plate made of hard synthetic resin having a uniform thickness is provided protrudingly along the center line of the top surface of the trapezoidal convex strip, and a bottom center line of the inverted trapezoidal concave strip is provided. A tapered groove into which a sealing plate of the same size as the sealing plate is fitted is provided along the trapezoidal convex groove on one side of one pile and the inverted trapezoidal concave groove on the other side of the adjacent same-shaped pile. When fitting the strips, the protrusion height of the seal plate and the taper groove are adjusted so that a predetermined distance is maintained between the fitting surfaces of the adjacent pile end faces by the contact between the seal plate and the tapered groove. A pile for the side wall of a basement characterized by a relationship with the depth of the groove.