JPH0786220B2 - Method for embedding reinforcing steel cage in soft ground and jig for embedding reinforcing steel cage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a method for burying a reinforcing steel cage in soft ground and a method for burying a reinforcing steel cage in soft ground when improving the ground Regarding jigs.

[Conventional technology]

Along with the recent rise in land prices, soft ground areas created by land reclamation along the coast have been widely used as construction sites.

When planning the construction of a building in such an area, some ground countermeasures have been taken, such as deepening the root of the building and providing a basement as a design consideration, but recently,
Actively improve the ground by excavating the ground and injecting the soil stabilizing material into the ground while stirring and mixing the excavated soil and the soil stabilizing material to create an improved column or underground continuous wall in the ground. The method is also done. In addition, a method of burying a reinforcing steel cage in the ground is also used to increase the supporting strength.

[Problems to be Solved by the Invention]

However, when embedding a reinforcing bar cage in the ground to increase the bearing strength of the ground, the reinforcing bar cage must be buried considerably deeply.
For this reason, there is a problem in that it cannot be buried as expected due to the large resistance of the surrounding ground by simply pushing it in from above.

In addition, there are cases in which the reinforcing steel basket cannot be embedded vertically due to tilting in the middle, and there is a problem that the reinforcing steel basket cannot be fully utilized.

Further, in many cases, it is necessary to bury a large number of rebar cages, so there is a problem in that the workability is inferior if the method is simply pushed in from above.

The present invention has been made to solve the above problems, a method for embedding a reinforcing bar car in soft ground that has made it possible to reliably embed a reinforcing bar car in soft ground, a reinforcing bar car pushing jig and a reinforcing bar car. The purpose is to provide a building jig.

[Means for solving the problem]

A method of embedding a reinforcing bar car in soft ground according to claim 1 according to the present invention is a second reinforcing bar car embedding cure which is formed in a tubular shape and is erected in the ground and in which the reinforcing bar car is built. And a first reinforcing bar cage burying jig that is built into the reinforcing bar cage embedded in the ground and is pushed into the ground together with the reinforcing bar cage, and the second reinforcing bar cage burying jig in the ground. Stand up, then build the rebar cage in the second rebar cage embedding jig, then build the first rebar cage embedding jig in the rebar cage, then the rebar cage Is pulled out from the second reinforcing bar cage embedding jig together with the first reinforcing bar cage embedding jig, then the reinforcing bar cage is pushed into the soft ground by the first reinforcing bar cage embedding jig,
Next, the first reinforcing bar cage burying jig is pulled out while leaving the reinforcing bar cage in the soft ground.

According to a second aspect of the present invention, there is provided a first reinforcing bar cage burying jig, wherein a shaft section to be inserted into the reinforcing bar cage over the entire length thereof and a lower end section of the shaft section protruding from the shaft section. A push-in portion that presses the bottom reinforcing bar arranged at the lower end downward, a gripping portion that projects from the upper end of the shaft portion and is gripped, and a protruding portion at the middle portion of the shaft portion that projects the reinforcing bar cage. It is characterized by comprising a reinforcing bar cage holding section.

A first reinforcing bar cage burying jig according to a third aspect of the present invention is a shaft section that is inserted into a reinforcing bar cage over its entire length and presses a bottom reinforcing bar arranged at the lower end of the reinforcing bar cage downward. And a grip portion that is provided so as to project from the upper end portion of the shaft portion and is gripped.

A second reinforcing bar car burying jig according to a fourth aspect of the present invention is formed in a tubular shape with a circular cross section so that a reinforcing bar car can be built in, a lower end portion is formed in a conical shape, and a bit is formed at the lower end portion. And a male screw portion is formed on the outer peripheral portion.

〔Example〕

FIG. 1 shows an embodiment of a first reinforcing bar cage burying jig (hereinafter referred to as “first jig 1”) according to claim 2 of the present invention, and particularly the viscosity of clay ground. Used for high and soft ground.

Explaining the configuration, the first jig 1 has a push-in portion 3 at the lower end portion of a shaft portion 2 which is inserted over the entire length of the reinforcing bar car A and which pushes a bottom reinforcing bar B arranged at the bottom of the reinforcing bar car A downward. By forming a gripping part 4 formed by a vibrator (not shown) at the upper end part and forming a reinforcing bar car holding part 5 for holding the reinforcing bar car A in the middle part, the inside of the reinforcing bar car A It has a diameter that can be inserted into.

The shaft portion 2 is formed of an H-section steel having a small cross section, but it is not necessarily made of the H-section steel, and may be formed of a channel steel or a steel pipe having a circular or rectangular cross section.

When the shaft portion 2 is formed of a steel pipe, the lower end portion is completely closed so that soil does not enter inside.

The push-in part 3 has a plurality of plates 3a, 3 at the lower end of the shaft part 2.
It is formed by welding a to a cross.

Further, the grip portion 4 is a portion that is gripped by a vibrator (not shown) when the jig body is lifted or when the jig is vibrated and pushed into the ground together with the rebar cage A. Is formed by welding the plate of FIG.

Further, the reinforcing bar car holding portion 5 is for holding the reinforcing bar car A vertically so as to prevent the reinforcing bar car A from tilting when the reinforcing bar car A is pushed into the ground and embedded, and is formed of a circular metal. It is formed by welding a ring made of aluminum to the intermediate portion of the shaft 2.

The effect can be further enhanced by attaching not only one but also two or more reinforcing bar cage holding portions 5 at regular intervals in the longitudinal direction of the shaft portion 2.

In addition, the shaft portion 2 is not a single piece and is a connection type assembly type having a plurality of parts, and the reinforcing bar car holding portion 5 is not a fixed type and is detachable so that different diameters can be freely exchanged. By doing so, one jig can be used for burying all the reinforcing bar cages A, such as long or short bars, or thick or thin bars.

The jig for burying the reinforcing steel cage shown in FIG. 2 is used for a ground having a relatively low viscosity such as sand ground. To describe the configuration, the pushing portion 3 is provided on the side surface of the shaft portion 6.
It is configured by projecting push-in portions 7, 7 similar to the above, and projecting a grip portion 9 similar to the grip portion 4 at the upper end portion.

The shaft portion 6 is formed of a steel pipe having a circular cross section slightly smaller than the diameter of the reinforcing steel cage A, and the lower end portion thereof is open so that it can easily come out even if soil is clogged.

The push-in portion 7 is for pushing the upper ends of the main bars a, a of the reinforcing bar cage A from top to bottom, and is formed by welding a steel pipe pipe into which the main bar a can be inserted to the side surface of the shaft section 6. There is.

Further, the steel pipes serving as the pushing portions 7 are attached to the outer peripheral portion of the shaft portion 6 at regular intervals in the circumferential direction.

It should be noted that the pushing portion 7 is at least 3 of the side surface portion of the shaft portion 6.
Although it is formed at a portion, the larger the number, the more the reinforced cage A can be pushed in more evenly and buried.

Further, the lower end portion 7a of the pushing portion 7 is in a state of protruding by a predetermined length from the lower end portion of the shaft portion 6, but the longer end allows the upper end portion of the main bar a to be deeply inserted and the reinforcing bar car A to be held vertically. Therefore, the inclination of the reinforcing bar cage A at the time of embedding can be reliably prevented.

FIG. 3 shows a first reinforcing bar cage burying jig (hereinafter referred to as “first jig 1”) according to claim 3 of the present invention, and the details thereof will be described. Is formed by projecting a gripping portion 9 similar to the gripping portion 4 on the upper end of the shaft portion 8. The shaft portion 8 has a circular or rectangular cross section with a diameter that can be inserted into the rebar cage A over its entire length. It is made of steel pipe.

The first jig 1 is inserted into the rebar cage A over its entire length, and the bottom rebar B arranged at the lower end of the rebar cage A at the lower end of the shaft 8 is directly pressed downward to rebar the car A. Embed inside. The first jig is used on the same ground as the first jig shown in FIG.

The first jig 1 shown in FIGS. 2 and 3 has a shaft portion.
If 6 and 8 are not a single piece but a connection type assembly type consisting of a plurality of parts, one jig can be used for both the long and short rebar cages of the rebar cage A.

FIGS. 4 and 5 show a second reinforcing bar cage burying jig according to claim 4 of the present invention. The first jig 1 shown in FIGS. 1 and 3 is a reinforcing bar cage A. It is used to insert and set inside, and in detail,
Second rebar cage burying jig (hereinafter referred to as "second jig 10")
Is formed in a cylindrical shape having a circular cross section into which the reinforcing steel cage A can be inserted.

Further, the lower end portion of the second jig 10 is formed in a conical shape, the lower end portion is provided with a bit 11 projecting, further, the male screw portion 12 is continuously formed in the outer peripheral portion in the vertical direction, and It is easy to screw in and stand up easily.

Further, a hanging metal fitting 13 for lifting the second jig 10 is attached to the upper end portion when the second jig 10 is screwed into the ground for embedding, transportation, or the like. The hanging metal fitting 13 is a screw type and is removable.

Next, a method of burying a reinforcing bar cage in the soft ground according to the first aspect of the present invention will be described.

(1) First, the second jig 10 is screwed into the ground, is inserted up to approximately the upper end thereof, and is vertically installed in the ground.

(2) Next, the rebar cage A is built in the second jig 10, and then the first jig 1 is inserted and set in the rebar cage A.

(3) Next, the reinforcing bar cage A is pulled out from the second jig 10 together with the first jig 1. Then, the rebar cage A together with the first jig 1 is forcibly pushed into the soft ground while vibrating by the vibrator.

(4) Then, when the rebar cage A can be installed in the soft ground, only the first jig 1 is pulled out. The first jig 1 and the second jig 10 are used repeatedly.

[Effect of the invention] A method of embedding a reinforcing bar cage in soft ground according to claim 1 of the present invention is a tubular shape, is erected in the ground, and has a reinforcing bar cage built in. The second reinforcing bar cage embedding jig and the first reinforcing bar cage embedding jig that is built into the reinforcing bar cage and pushed into the ground together with the reinforcing bar cage. The second reinforcing bar cage embedding jig is provided in the ground. , And then build the reinforcing bar car in the second reinforcing bar car embedding jig, then insert the first reinforcing bar car embedding jig in the reinforcing bar car, then the reinforcing bar Pull out the car from the second reinforcing bar car embedding jig together with the first reinforcing bar car embedding jig, then push the reinforcing bar car into the soft ground together with the first reinforcing bar car embedding jig, then, The first rebar cage embedding jig leaving the rebar cage in the soft ground Since it is pulled out, there is an effect that the rebar cage can be surely embedded in the soft ground.

A second reinforcing bar car burying jig according to a fourth aspect of the present invention is formed in a tubular shape with a circular cross section so that a reinforcing bar car can be built in, a lower end portion is formed in a conical shape, and a bit is formed at the lower end portion. Since it is projected and the external thread is formed on the outer peripheral part, it can be securely erected in the ground even if the ground is a little hard, and the first reinforcing bar car burying jig is It has the effect of being easily set inside.

Since the first reinforcing bar cage embedding jig and the second reinforcing bar cage embedding jig according to claims 2, 3, and 4 of the present invention are both constructed to have an extremely simple structure, It has the effect that it can be manufactured easily and inexpensively, and that it can be easily handled such as washing with water.

[Brief description of drawings]

1 to 3 show a first reinforcing bar cage burying jig according to the present invention, all of which are perspective views, and FIGS. 4 and 5 show a second reinforcing bar cage burying jig. FIG. 5 is a side view thereof, and FIG. 5 is a top end perspective view. 1 ... 1st jig (1st steel cage burying jig), 2 ... shaft part,
3 ... Push-in part, 4 ... Gripping part, 5 ... Reinforcing bar cage holding part, 6
... Shaft part, 7 ... Push-in part, 8 ... Shaft part, 9 ... Gripping part, 10 ...
2nd jig (2nd steel cage burying jig), 11 ... bit, 12
… Male thread, 13… Suspending jig, A… Reinforcing bar basket, B… Bottom reinforcing bar.

Claims (4)

[Claims] 1. A second reinforcing bar car burying jig which is formed in a tubular shape and is erected in the ground and in which a reinforcing bar car is built, and a second reinforcing bar car burying jig which is built in the ground, It is equipped with a first reinforcing bar cage embedding jig that is pushed into the ground together with a reinforcing bar cage, and the second reinforcing bar cage embedding jig is erected in the ground, and then this second reinforcing bar cage embedding jig is used. Build the reinforcing bar cage, then insert the first reinforcing bar cage embedding jig into the reinforcing bar cage, then insert the reinforcing bar cage with the first reinforcing cage cage embedding jig into the second reinforcing bar cage. Pull out from the burial jig, then push the rebar cage into the soft ground by the first rebar cage burial jig, then,
A method for embedding a reinforcing bar cage in soft ground, characterized in that the first reinforcing bar cage embedding jig is pulled out while leaving the reinforcing bar cage in the soft ground. 2. A shaft portion which is inserted into the reinforcing bar car over the entire length thereof, and a pushing portion which is protruded from a lower end portion of the shaft part and which pushes downward a bottom reinforcing bar arranged at the lower end portion of the reinforcing bar car. And a gripping part projecting from the upper end of the shaft part and gripped, and a reinforcing bar car holding part projecting in the middle part of the shaft part for holding the reinforcing bar car. The first reinforced steel cage burying jig. 3. A shaft part which is inserted into the reinforcing bar car over the entire length thereof and which pushes downward a bottom part reinforcing bar arranged at the lower end part of the reinforcing bar car, and a shaft part projecting and gripped at the upper end part of this shaft part. A first reinforcing bar cage burying jig, comprising a grip portion. 4. A cylindrical shape having a circular cross section so that a reinforcing steel cage can be built therein, a lower end portion is formed in a conical shape, a bit is projected at the lower end portion, and a male screw portion is formed on the outer peripheral portion. The second jig for burying a cage in a reinforcing bar.