JPH0328532B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing foundation piles for lattice-like walls, in which the foundations of various structures are constructed by continuous foundation piles that are constructed using an improved hardening agent in the ground.

In general, the method of constructing foundations using prepared piles for this type of building is one in which the entire area of the foundation is improved and prepared one after another and the foundation piles are constructed over the entire area.However, since the entire area is created evenly, it requires a large number of construction times and time. There are also drawbacks such as the need for a large amount of curing agent and the like, making it expensive. In addition, if the foundation piles are built one by one using a construction machine, the lateral horizontal force on the created foundation piles will be greatly weakened, and it is not technically reliable. There are drawbacks.

This invention is intended to solve such conventional problems, and its main gist is that the construction machine has a three-axis swivel device located in the ground constituting the foundation. Using a three-axis stirring rod equipped with stirring blades and injection holes, three foundation piles made of improved hardener are connected and constructed simultaneously. In addition, the constructed foundation piles will be successively installed on the lattice wall. The foundation is constructed by filling and hardening core bodies such as various steel pipes inside the intersection parts or corner parts of the foundation piles constructed on the lattice-like wall.

Therefore, according to the present invention, the foundation piles are continuously constructed using a plurality of piles prepared using a soil-improving solidifying agent, so that the entire foundation can be integrated very easily and quickly, and the vertical and horizontal forces can be easily and quickly constructed. On the other hand, when compared with the conventional method of building a foundation by connecting a single foundation pile in sequence, hardening increases the bearing capacity, and the horizontal force in the lateral direction is significantly strengthened. This has the effect of significantly reducing the amount of materials used and being economical. In addition, since the core is inserted and hardened at the intersections and corner portions, it is possible to obtain sufficient vertical support force and horizontal support force, and has the property of being able to sufficiently support the structure.

Next, an embodiment of the present invention will be explained with the help of illustrations. Fig. 1 shows a slope view of the entire structure on which a building built on foundation piles is placed, completed by the construction method of this invention. , 1 is a foundation structure built on a lattice-like wall, and this foundation structure 1 is made up of a large number of foundation piles 2, 2, 2, 2... It is composed of. These foundation piles 2, 2... are successively constructed in sets of three by the construction machine 7 described below, and are successively constructed in a lattice pattern as shown in Figures 2 and 3. It is constructed so that walls 6, 6, 6, etc. are constructed sequentially. This lattice wall 6,
6, core bodies 3, 3 having various cross-sectional shapes such as steel pipes and H steel are inserted and hardened into the foundation pile 2 at intersections or corner portions before the hardening agent is hardened. The grid-like walls 6, 6, . . . form rectangular spaces 4, 4 inside the grid.
5 shows various buildings built on top of the basic structure 1. Next, the construction machine 7
A triple-type three-axis swivel device 8 is positioned at the top of the device, and three rods 9, 9, 9 are connected to the lower end of the three-axis swivel device 8. An earth auger machine 1 is installed at the lower end of the rods 9, 9, 9.
0, and three stirring rods 11, 11, 11 are connected to the lower end thereof via a reducer or the like so as to be able to rise and fall freely. The stirring rod 1
1, 11, 11 are each equipped with several stirring blades 12, 12... for stirring on the outer periphery, and an injection hole 1 for injecting a hardening agent such as powder into a required position approximately below.
3, 13, and 13 are bored respectively. code 1
5 shows the ground of the construction site.

In this invention, construction is carried out using the above-mentioned construction machine 7, and the construction machine 7
Generally, as shown in Figures 6A to 6E, three shafts parallel to it are driven and rotated by a three-axis swivel device 8 and an earth auger machine 10.
A series of stirring rods 11, 11, 11 are connected to stirring blades 12,
12, 12, Hori Susumu mixes and stirs and injects the curing agent together with pressurized air from the injection holes 13, 13,
Alternatively, without injecting, the material descends and penetrates to a predetermined depth while uniformly mixing, and as shown in FIG. Further, there are times when the foundation pile 2 is constructed while injecting a hardening agent together with pressurized air only during this pulling process. In addition, the foundation piles 2, 2, 2 are mixed once again as shown in Fig. 6 (d) and (e), and the foundation piles 2, 2, 2 are mixed once again as shown in Figs. 2 and 3. It will be constructed in one piece by connecting the three in a row by lifting and lowering the mixture.

Each of the foundation piles 2 constructed in three rows is successively connected in a lattice shape to form a lattice-like wall 6. Before the curing agent of the foundation pile 2 at a preset intersection with the lattice wall 6 connecting the lattice wall 6 or at a corner portion hardens, the core bodies 3, 3 such as steel pipes are inserted and solidified. Finally, the wall portion 14 of the building 5 has the core bodies 3, 3 embedded therein. It will be accepted in part.

As mentioned above, according to the method of constructing foundation piles for lattice-like walls using an improved hardening agent in the ground according to the present invention, the solidified foundation piles create a structure in which the entire foundation is integrated with continuous walls in the form of a lattice. , it is possible to obtain a technically reliable and very economical foundation structure with the effect of significantly increasing the bearing capacity, vertical force and horizontal force. In addition, this invention does not have to worry about the weakness of horizontal force, unlike conventional foundation piles that are constructed in single units, and is sufficiently strong, and the ground improvement rate is higher than that of foundation piles that are constructed over the entire area of the foundation. Since the construction cost is low, construction costs are significantly reduced, resulting in a very economical effect.

Further, according to the present invention, horizontally continuous foundation piles are simultaneously constructed using a three-axis stirring rod each having a stirring blade and an injection hole, so that the construction ability is extremely efficient and the adjacent foundation piles can be constructed simultaneously. Since the piles are built in duplicate, it has the effect of exhibiting sufficient strength and water-stopping properties. By inserting core bodies such as tubular steel at the intersections and corners of each lattice-shaped wall that was created, even greater vertical and horizontal bearing capacity is achieved for the building. There are practical effects that can be fully achieved.

[Brief explanation of drawings]

Fig. 1 is a partially cut-out slope view of a structure placed on a foundation pile using the foundation pile construction method for a lattice-like wall according to the present invention, and Fig. 2 is a slope view of the lattice-like wall in its construction state. , FIG. 3 is a cross-sectional plan view, FIG. 4 is a partially enlarged slope view with the main parts of FIG. 1 removed, FIG. 5 is a front view of the construction machine used in this method, and FIGS. E is a cross-sectional view of the ground sequentially showing the construction process of the present invention. Code 1 is the foundation structure, 2 is the foundation pile,
3 is a core, 4 is a space, 6 is a lattice wall, 7 is a construction machine, 8 is a 3-axis swivel device, 9 is a rod, 10
is an earth auger machine, 11 is a stirring rod, 1
3 is an injection hole.

Claims (1)

[Claims] 1. In a foundation pile construction method for a lattice wall in which connected foundation piles are continuously created by mixing and stirring an improved hardening agent in the ground, the foundation piles are stirred at the lower end of a construction machine having a three-axis swivel device. Three sets of foundation piles in the horizontal direction are created simultaneously using three sets of stirring rods equipped with blades and injection holes, and the three sets of foundation piles are sequentially constructed in a lattice-like wall by creating square-shaped spaces. A method for constructing a foundation pile for a lattice-like wall, which comprises filling and hardening a core such as a steel pipe into the unhardened interior of the foundation pile located at the intersection or corner portion of the lattice-like wall.