JPH0751779B2 - Reverse pile construction method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a reverse pile construction method and device for constructing on-site construction piles which are the basis of a construction by a reverse construction method.

(Prior art) Conventionally, in the pile construction method by the reverse construction method, while the press-fitting the stand pipe into the ground with a vibro hammer, etc., the hammer club is used to carry out the inner digging, and the stand pipe is press-fitted to a predetermined depth, and the reversing machine The muddy water in the stand pipe is sucked up with the excavated soil from the hollow part of the rotary shaft of the reverse machine driven by the rotary table, excavated while circulating the pressure water, and the reinforced basket is built in the excavated hole to remove the concrete. After placing, the stand pipe is pulled out, covering the soil and curing.

(Problems to be solved by the invention) In the conventional reverse construction method, since a middle digging is performed by using a hammer club or the like while press-fitting a stand pipe with a vibro hammer or the like, on-site construction piles in urban mountains or narrow places are used. During construction, construction pollution such as noise and vibration due to construction machinery will occur nearby.

Particularly in a narrow space, it is difficult to move the construction machine to and from where it is to be carried in and installed, and the construction becomes complicated due to replacement of various machines.

The present invention has been proposed in view of the above problems of the prior art, the purpose of the purpose is to prevent the occurrence of construction pollution even in urban areas and narrow places, reverse construction improved It is a point to provide a pile forming method and an apparatus thereof.

(Means for Solving the Problem) In order to achieve the above object, according to the method for forming a reverse pile according to the present invention, the casing jack is suspended on one side, and the reverse machine and the rotary table are provided on the upper side. A movable work platform, which is movably mounted on the pile, is installed at the pile construction position,
After moving the reverse machine and the rotary table to the outer position of the pile core on the mount and penetrating the stand pipe into the ground through the casing jack, move the reverse machine and the rotary table to the pile core position. Then, after excavating the vertical hole by the reverse circular lacing method, move the reverse machine and the rotary table to the outside of the pile core position, and place a reinforced cage in the excavation hole to place the concrete of the pile structure. The stand pipe is pulled out by the casing jack.

The reverse pile forming method according to the present invention includes a movable work platform, a stand pipe press-fitting / extracting casing jack suspended on one side of the work platform, and a reverse mount movably mounted on the work platform. Machine and rotary table,
It is composed of a casing pipe press-fitting reaction force support which is loaded on the work platform.

(Operation) According to the present invention, the movable work platform for reverse pile construction is installed at the pile construction position, and the reverse machine and the rotary table movably mounted on the same platform are once moved to the outside of the pile core position. After that, by press-fitting the stand pipe with the casing jack suspended from the mount,
Press in the stand pipe without vibration.

Next, the reverse machine and the rotary table mounted on the platform are moved to the pile core position again, and the reverse machine and the rotary table excavate the inside of the stand pipe to a required depth, and then the reverse machine and the rotary table are pile core. Move to the outside of the position and build a rebar cage in the excavation hole, place concrete in the excavation hole to create a pile frame, then pull out the stand pipe with the casing jack and then construct the pedestal next time. It moves to a position.

According to a second aspect of the present invention, a stand pipe press-fitting reaction force support is loaded on a movable work platform on which a stand pipe press-fitting casing jack, a movable reverse machine, and a rotary table are mounted. At times, the press-fitting reaction force of the pipe is supported so that the pipe can be press-fitted without vibrating.

(Examples) The present invention will be described below with reference to illustrated examples.

In FIGS. 1 and 2, 1 is a reverse pile forming device A.
On the work platform, traveling wheels 3 traveling on a rail 2 laid on the ground B are mounted, and on the platform 1, counterweights constituting a stand pipe press-fitting reaction force support body 4 are loaded.

A casing jack 5 is suspended near one side of the gantry 1, and a known reverse machine 6 and a rotary table 7 are mounted on the gantry 1 so as to be movable in the left-right direction in FIG. .

In the figure, reference numeral 8 is a sleeper.

Thus, the pedestal 1 is moved along the rail 2 installed on the ground B to a predetermined position where the pile is formed, and the pedestal 1
The reverse machine 6 and the rotary table 7 are moved to a position separated from the pile core (see FIG. 4), and the stand pipe C is inserted into the casing jack 5 (see FIG. 5). The casing jack 5 press-fits to a predetermined depth. (See FIG. 6) Then, the reverse machine 6 and the rotary table 7 are returned to the old positions again, and the drill pipe 9 is rotated by the rotary table 7 to remove the muddy water in the stand pipe C.
It is sucked up with the excavated soil from the hollow part of the, and excavated while circulating water. (See FIG. 7) In the figure, reference numeral 10 is a circulation hose.

Thus, when excavating to a predetermined depth, the reverse machine 6 and the rotary table 7 are moved again, a rebar cage is installed in the excavation hole, the slime in the excavation hole is treated, concrete is poured, and then the casing jar is placed. The stand pipe C is pulled out by the wood 5, the reverse pile forming device A is moved to the next construction position, and soil is covered on the top of the pile.
Give a cure.

Note that the stabilizing solution such as muddy water and bentonite excavated by the reverse circulation is carried out only by the treatment device installed at the rear side, and the stabilizing solution is adjusted and circulated again.

FIG. 3 shows another embodiment of the reverse pile construction device, in which the work platform 1 travels on wheels 3 ′ such as tires on a lining plate 11 laid near the pile construction ground, and when the pile is constructed, the above-mentioned platform is used. 1
The outrigger 12 mounted on the side surface of the pedestal 1
Is so constructed as to support the same frame 1.

The apparatus other than the gantry 1 is the same as that of the above-mentioned embodiment.

(Effect of the invention) According to the present invention, as described above, the casing work is suspended on one side and the movable work table on which the reverse machine and the rotary table are movably mounted is used in the upper part,
Vibration and noise are reduced by press-fitting a stand pipe with the casing jack, and press-fitting and pulling-out work of the stand pipe and excavation in the pipe are performed by moving the reverse machine and the rotary table onto the mount. And reinforced cage construction in the excavation hole,
As it does not interfere with concrete pouring work, vibro hammer, hammer mag,
This eliminates the need to transfer the machinery of the reverse machine and enables the construction of reverse piles efficiently in urban areas and in narrow places without causing construction pollution.

The invention according to claim 2 is characterized in that a movable work platform, a casing pipe press-in / out casing jack suspended from one side of the work platform, a reverse machine and a rotary table movably mounted on the work platform. And a reverse pile forming device composed of the casing pipe press-fitting reaction force support loaded on the work platform, the reverse pile forming work is efficiently performed, and the stand pipe loaded on the platform is constructed. The press-fitting reaction force support supports the reaction force at the time of press-fitting the stand pipe to prevent vibration of the pipe.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a reverse pile forming device according to the present invention, FIG. 2 is a view taken along the line II-II in FIG. 1, and FIG. 3 is another reverse pile forming device according to the present invention. 4 is a front view showing the movable work platform portion in the embodiment of the present invention, and FIGS. 4 to 7 are front views showing the steps of an embodiment of the reverse pile construction method according to the present invention. A: Reverse pile forming device, B: Ground, C: Stand pipe, 1 ... Work platform, 4 ... Stand pipe press-fitting reaction force support body, 5 ... Casing jack, 6 ... Reverse machine, 7 ...... Rotary table.

Claims (2)

[Claims] 1. A movable work platform having a casing jack suspended from one side and a reverse machine and a rotary table movably mounted on the upper side thereof is installed at a pile forming position, and the reverse machine and the rotary table are installed. Is moved to the outer position of the pile core on the mount, and the stand pipe is penetrated into the ground through the casing jack, and then the reverse machine and the rotary table are moved to the pile core position to reverse the reverse circle After excavating the vertical hole by the syon method, move the reverse machine and the rotary table to the outside of the core position of the pile, install a rebar cage in the excavation hole, place a concrete pile body, and stand by the casing jack. A reverse pile construction method characterized by pulling out a pipe. 2. A movable work platform, a casing pipe press-fitting / extracting casing jack suspended from one side of the work platform, a reverse machine and a rotary table movably mounted on the work platform. A reverse pile forming device comprising a casing pipe press-fitting reaction force support body loaded on the work platform.