JP2006022608A5 - - Google Patents

Claims (11)

Drill a hole from the excavated surface of the foundation into the ground, fix a rigid reinforcing material in the ground, and then fix the base end of the reinforcing material in the foundation body to build the foundation. In the ground reinforcement type foundation forming method,
The reinforcing member is driven from the base body toward the outside in the horizontal direction,
It is calculated by the following formula (1), which increases the resistance of the natural ground to the horizontal force acting on the foundation by structurally sharing a part of the tensile stress, compressive stress and shear stress with respect to the natural ground. Proof strength increment ΔPs,
ΔPs = Σ (Smax _i · cos Θ + Nmax _i · sin Θ) (1)
Where Smax _i is the maximum shear force of the reinforcing material,
Nmax _i is the maximum axial force of the reinforcing material,
Θ is the angle formed by the horizontal line perpendicular to the direction of the horizontal force and the direction in which the reinforcing material is placed
Every time,
i corresponds to the number of reinforcing materials (i ≧ 1)
Strength which is calculated by the following formula (2) and formula (3), which increases the resistance of the ground to the horizontal force acting on the foundation body by restraining the tensile strain and compressive strain generated in the ground by the reinforcing material. Increment ΔPr,
ΔPr = Σ (Nmax _i · cos Θ−Smax _i · sin Θ) · tan Φ · f (Θ) (2)
f (Θ) = [ ² cos ² (Θ−45 ° + Φ / 2) − (1-sinν)] / (1 + sinν) (3)
Where Φ is the internal friction angle of the natural ground on which the foundation is built,
ν is the arrangement of the reinforcing material for the horizontal bearing force in the foundation formation of the ground reinforcing type, wherein the reinforcing material is arranged when it is assumed that a horizontal force acts on the foundation body based on the dilatancy angle. Method.   2. The horizontal supporting force strengthening type in the foundation formation of the ground reinforcing type according to claim 1, wherein the reinforcing material is disposed at the angle Θ in which a maximum value obtained by adding at least the yield strength increments ΔPs and ΔPr is generated. Reinforcing material placement method.   2. The horizontal in the foundation formation of the ground reinforcement type according to claim 1, wherein the reinforcing material is disposed at least in the direction of the minimum principal strain when the horizontal force acts as a tensile force on the reinforcing material. Arrangement method of reinforcing capacity reinforcement type.   The ground according to any one of claims 1 to 3, wherein the reinforcing member is disposed at least in the maximum principal strain direction when the horizontal force acts as a compressive force on the reinforcing member. Arrangement method of reinforcing material for strengthening horizontal bearing capacity in reinforced foundation formation.   The horizontal supporting force in the foundation formation of the ground reinforcement type according to any one of claims 1 to 4, wherein the reinforcing material is disposed on the outer peripheral surface of the foundation main body at a ratio of approximately one per 2 square meters. Arrangement method of reinforced reinforcement. The basic body built by excavating the natural ground,
A rod-shaped reinforcing material that is placed in the horizontal direction from the foundation body and is fixed in the natural ground;
In the ground-reinforced foundation with horizontal force acting,
When the horizontal force acts as a tensile force on the reinforcement, arrange at least one of the reinforcements so as to coincide with the minimum principal strain direction of the natural ground,
And when the said horizontal force acts as a compressive force on the said reinforcement, at least 1 of the said reinforcement was arrange | positioned so that it might correspond with the largest main strain direction of the said natural ground, It is characterized by the above-mentioned. A ground-reinforced foundation. The basic body built by excavating the natural ground,
A rod-shaped reinforcing material that is placed outside from the foundation body and is fixed in the natural ground;
In the ground-reinforced foundation with horizontal force acting,
The foundation body rotates around a rotation center in the foundation body by a horizontal force,
When said horizontal force acts as a compressive force to the reinforcing material, soil reinforced foundation body, characterized by arranging the reinforcement member obliquely downward from the basic body. When the horizontal force acts as a compressive force on the reinforcing material, the reinforcing material is disposed obliquely downward from the foundation body, and the reinforcing material is aligned with the maximum principal strain direction of the natural ground. The ground reinforcing type foundation according to claim 7, wherein at least one of the reinforcing members is arranged. When the horizontal force acts on the reinforcing material as a tensile force, the reinforcing material at the lower part of the basic body is disposed obliquely downward from the basic body. Ground foundation of the ground reinforcement type described. When the horizontal force acts as a tensile force on the reinforcing material, the reinforcing material at the lower part of the foundation body is disposed obliquely downward from the foundation body and coincides with the minimum principal strain direction of the natural ground. The ground reinforcement-type foundation according to claim 9, wherein at least one of the reinforcing members is arranged as described above. 11. The ground reinforcement according to claim 6, wherein a horizontal cross-sectional shape of the foundation main body is any one of a circular shape, an oval shape, an oval shape, and an annular cross-sectional shape thereof. The basic body of the mold.