JPS6039811B2 - Silent and vibration-free burial method and equipment for piles - Google Patents

Description

[Detailed description of the invention] The present invention relates to a noiseless and vibrationless construction method for inserting ready-made piles into the ground, and an apparatus therefor. This is a construction method and device that completely eliminates damage to the pile by transmitting the rotational force of the screw auger to the tip of the pile when the artificial screw auger and the ready-made pile are rotated in opposite directions.

Conventionally, in this type of construction method, for example, the steel pipe pile insertion method, a displacement device such as a screw auger or jet pipe is inserted into the hollow hole of the steel pipe pile, and the screw is inserted so that the device and the steel pipe pile rotate in opposite directions. There is a construction method in which a motor applies rotational force to the shaft head of an auger or jet pipe, or to the head of a steel pipe pile, but when this method is applied to concrete piles instead of steel pipe piles, if the tip of the concrete pile penetrates the hard concrete, it will naturally rotate. The force must be strong enough to be introduced into the head of the concrete pile, and this rotational force causes a large twist in the concrete pile body, which can lead to the concrete pile body becoming torsionally cut and fractured. Therefore, the above method was a small-scale construction method that was used only for steel pipe piles.

Another construction method has been developed in which a jet pipe is loaded into the hollow part of a steel pipe pile or a concrete pile, and the rotational force of the pipe is transmitted by a connecting device installed at the tip of the pile to rotate the pile. In this construction method, the pile and the pipe loaded into the hollow part of the pile are in the same direction and have the same rotation speed, and in the case of a removal device such as a spiral auger, the screw auger and the pile are in the same direction and have the same rotation speed. This resulted in a complete loss of power, and this construction method was only applicable to a small range of jet pipes.

The present invention was made in order to solve the above-mentioned drawbacks of the conventional construction method at once.The present invention was made in order to solve the above-mentioned shortcomings of the conventional construction method at once. A drilling machine such as a screw auger or a jet pipe is inserted, and a power transmission steel pipe with a multi-stage notched groove for fitting the connecting punch drilled on the circumferential side of the tip is inserted inside the pile. The periphery or outer periphery is equipped with iron so that the same rotation as that of the steel pipe is applied to the pile by iron fitting between the connection village and the notch groove, and the pile is rotated while giving opposite rotations to each other from the head of the drilling machine and the steel pipe. By inserting the pile into the ground, there is no torsion of the pile caused by soil resistance and rotation, so there is no risk of damage to ready-made hollow piles, and the pile sinks easily, improving construction efficiency. The purpose is to provide a vibration-free construction method and its equipment, and its scope of use extends to all hollow piles. Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1, 2, and 3, first, in the case of a concrete pile, attach several connecting punches 2 to the top end of the hollow pile 1, through the end plate of the hollow pile 1, toward the center of the pile. It protrudes from the inner and outer surfaces and is installed radially after melting or with bolts, etc. Next, a screw auger 4 having a tip drilling bit 3 is inserted into the hollow part of the hollow pile 1, and a steel pipe 6 for transmitting rotational power is arranged on the inner circumference of the pile. 6, a joining notch 8 having several notches 7 on both left and right sides along the tube axis direction from the tip so that the connecting punch 2 can be inserted is provided on the circumferential side of the tip of the steel pipe according to the number of connecting holes. It is installed in This steel pipe 6 is fitted with iron on the inner circumferential side of the hollow pile 1, and the bottom of the steel pipe is placed on the connecting tool 2, and by giving a slight rotation to the steel pipe 6, the connecting punch 2 is used to connect the steel pipe 6. The steel pipe 6 and the hollow pile 1 can be easily connected by inserting the iron into the predetermined notch 7 from the notch groove 8. Thereafter, a motor is connected to the head of the screw auger 4 to apply rotational force to start excavation, and at the same time, a rotation in the opposite direction to the rotation direction of the screw auger 4 is applied to the head of the steel pipe 6. Fourth
As shown in Figure A, the excavation work starts, and when a rotation opposite to the direction of rotation of the screw auger 4 is applied to the head of the steel pipe 6, the rotational force is applied to the connection which is drilled into the notched groove 8. This is transmitted to the village 2, and causes the hollow pile 1 to rotate in the opposite direction to the screw auger 4 from the tip of the pile.

The earth and sand below the hollow pile 1 excavated by the tip excavation bit 3 of the screw auger 4 is discharged to the ground by the screw, and the hollow pile 1 sinks while rotating, and the insertion of the pile progresses.

In this case, if the tip surface (outer end) of the connecting punch 2 is slightly protruded from the outer surface of the hollow pile 1, the earth and sand will be scraped off to a greater extent than the outer diameter surface of the hollow pile 1, and the earth and sand on the circumferential surface of the pile will be removed. It is possible to reduce friction and further facilitate the rotation and settling of the hollow pile 1. According to this construction method, the screw auger 4, the steel pipe 6, and the hollow pile 1 are rotated in opposite directions, which not only enhances the effect of removing excavated earth and sand by the screw auger 4, but also allows the hollow pile to be removed from the tip of the pile. Since a rotational force of 1 is introduced, no "twisting" occurs in the pile body at all. When the hollow pile 1 is inserted to the support layer at a predetermined depth as shown in the opening of Figure 4 in this way, mortar or cement solution is pumped through the hollow shaft part 5 of the screw auger 4 as in the conventional construction method. Pour it out from the tip and harden the pile tip (see the opening in the same figure), then rotate the steel pipe 6 slightly in the opposite direction and insert the connecting village 2 from the notch groove along the pipe axis direction of the bale fitting notch groove 8. Remove and pull out the steel pipe 6 as shown in Figure 4 C.
The work is completed by pulling it up from inside the hollow pile 1 together with the screw auger 4.

The above describes the case where a screw auger 4 is used and a steel pipe 6 is inserted into a bale on the inner circumferential side of the hollow pile 1 to bury the pile. However, in the present invention, a jet pipe is used instead of the screw auger. There is no problem in using it, and as shown in Figures 5 and 6, a drilling machine 4 such as a screw auger is inserted into the hollow part of the hollow pile 1, and a notched groove 8 for Europe and Japan is formed on the outer periphery of the hollow pile 1. The steel pipes 6′ having the
If the coupling punch groove 8' installed in the steel pipe 6' is made to compete with the coupling punch 2, and its head is connected to the prime mover in order to cause the steel pipe 6' and the screw auger 4 to rotate in opposite directions as described above, It is possible to sink and insert the pile into the excavated hole under the tip of the hollow pile 1, and to insert the pile etc. into the specified ground silently and without vibration, without causing "torsion breakage" to the hollow pile, especially concrete pile, etc. Any method that can be used for construction may be used for the inner or outer position of the steel pipe and hollow pile.

In addition, in order to make the tips of the steel pipes 6, 6' further ahead of the tips of the hollow piles 1 and to facilitate the excavation of hard soil, the notches 7, 7' of the notch grooves 8, 8' for steel fittings are set in several stages. By processing and inserting the connecting village 2 into the notch of the required step, the hollow pile 1
Since the amount (depth) of the pre-excavation hole under the tip of the hollow pile 1 is large, the frictional resistance caused by the earth and sand of the hollow pile 1 is reduced, and the sinking of the pile is promoted.

As described above, the present invention is such that the excavation and removal pipe (drilling machine shaft) inserted into the hollow part of the pile, such as a screw auger, and the hollow pile rotate in opposite directions, and the rotational force of the pile is applied from the tip of the pile. Therefore, when inserting the pile into the ground, there is no "twisting" in the pile body, and there is no loss of displacement force by the screw auger.

Therefore, a 9E engineer who excavates under the tip of a hollow pile can perform the lowering and insertion of the pile smoothly and quickly without noise or vibration, improving construction efficiency and not causing any "twisting" in the pile. Therefore, there is no damage to the piles, and it can be used not only for steel pipe piles but also for the construction of reinforced concrete piles and prestressed concrete piles. Furthermore, the issue of placing the tip of the steel pipe ahead of the tip of the pile can be solved by installing a multi-stage notched groove, which is also effective in excavating the hard layer at the tip of the pile and preventing leakage of the cement solution.

In addition, in the present invention, a rotation transmission steel pipe having European and European notched grooves can be installed on the outside or inside of the pile, and the excavation device inserted into the hollow part of the pile can be either a screw auger or a jet pipe. It has the advantage of being able to be constructed without any problems.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of a constructed crack layer showing an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1 excluding the screw auger mountain, and Fig. 1 is a side view, partially cut away, FIG. 4 is an explanatory diagram showing the construction state of the pile, and FIG. 5 is a partially cut away front view showing another embodiment of the construction device of the present invention. FIG. 6 is a sectional view taken along the line B-B in FIG. 5 excluding the screw auger, and FIG. 7 is a side view showing a state in which the rotation transmission steel pipe and the hollow pile are connected. 1 is a hollow pile, 2 is a connecting rod, 4 is a drilling machine, 5 is a hollow shaft,
6 and 6' are steel pipes, 7 and 7' are notched portions, and 8 and 8' are notched grooves for fitting. Figure 2 Figure 5 Figure 1 Figure 3 Figure 5 Figure 7 Figure 4

Claims (1)

[Scope of Claims] 1. A hole drilling machine such as a jet pipe or a screw auger is inserted into the hollow part of a cylindrical pile with several connecting rods protruding inwardly and outwardly attached to the pile tip surface or the side surface of the pile tip. Further, a steel pipe having a notched groove for fitting into the connecting rod at its tip is fitted onto the inner or outer periphery of the pile, and the connecting rod and the notched groove are fitted to form a steel pipe. The same rotation is given to the pile, and the pile is inserted into the ground from the tip of the pile while being rotated in the opposite direction to the boring machine while giving opposite rotations to the drilling machine and the steel pipe.
A noiseless and vibrationless burying method for piles, which is characterized in that after reaching a desired depth, a connecting rod is removed from a notched groove, a steel pipe and a hardening solution are poured out, and a hole boring machine is pulled up. 2. Several connecting rods are attached to the tip end surface or the side surface of the tip end of a cylindrical hollow pile, facing inward and outward, and several stages of removable insertion and removal are provided on the inner or outer periphery of the pile to straddle the connecting rods. A steel pipe with a notched groove drilled at the tip is fitted, and the steel pipe and pile are configured to rotate together by fitting the connecting rod and the fitting notched groove, and a cement solution, etc. is applied to the hollow part of the steel pipe or the pile. A drilling machine such as a jet pipe or a screw auger with a hollow shaft capable of pouring is installed inside, and rotational forces of opposite rotation are introduced into the heads of the drilling machine and the steel pipe by a prime mover. Silent and vibration-free burying device for piles.