JPH10292361A - Driving method of drain member into ground - Google Patents

Abstract

PROBLEM TO BE SOLVED: To force a casing to penetrate a ground such as the periphery of an existing oil tank, which a large heavy construction machine can not enter, by use of a small boring machine or the like and drive a drain member to prevent the liquefaction of the ground. SOLUTION: After a drain member 1 equipped with an anchor plate 2 at one end thereof has been inserted in a casing 5, the drain member 1 is inserted into the ground G together with the casing 5 by a driving machine 6. And the casings 5 and the drain members 1 are additionally connected to insert them to a specified depth of the ground. And then, water is poured into the casings 5 and only casings 5 are drawn out of the ground G and then, the periphery of the drain members is filled back.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a drain constructed to prevent liquefaction by placing a drain material on the ground around an existing structure such as an oil tank into which heavy equipment cannot be carried. The present invention relates to a method of placing materials on the ground.

[0002]

2. Description of the Related Art Conventionally, a method of casting a drain material into a sandy ground in order to prevent the liquefaction phenomenon of the sandy ground has been widely known. On the other hand, for existing structures such as oil tanks constructed on sandy ground where liquefaction may occur, as a measure to prevent liquefaction due to disasters such as earthquakes, the ground around the existing structures In recent years, there has been a request from related authorities and the like to put drain material inside.

On the other hand, in a conventional method of driving a drain material into the ground, an anchor plate is attached to the end of a casing in a state where the drain material is previously charged in a casing of a predetermined length, and a pile driving with a crawler is performed. Using a heavy machinery such as a drilling machine, penetrated the ground into a ground with a length that could be cast to a predetermined depth, and when the casting had been completed to the predetermined depth, the drain material was left in the ground and the casing was removed. .

[0004] However, since a large number of pipes are arranged around the existing structure such as the oil tank as described above, it is difficult for a large heavy machine to enter and to perform a drain material setting operation. Therefore, the present inventors are able to easily enter the vicinity of an existing structure such as an oil tank as described above and perform a simple driving machine capable of performing a penetration operation of a casing on the ground, for example, measuring the strength of the ground, Focusing on a small boring machine for conducting geological surveys, etc., and after conducting various studies and repeating experiments, the inventors have devised a casting method of the present invention capable of driving a drain material to the ground with a simple driving machine. .

[0005]

SUMMARY OF THE INVENTION The present invention uses a simple driving machine such as a small boring machine to make a casing penetrate into the ground where large heavy equipment cannot enter, such as around an existing oil tank, and a drain material is provided. The present invention provides a method of placing a drain material on the ground, which makes it possible to take measures against liquefaction.

[0006]

According to the present invention, a drain material having an anchor plate attached to one end is inserted into a casing, and then the drain material is penetrated into the ground together with the casing by a driving machine, and the casing and the drain material are removed. After adding and penetrating the ground to a predetermined depth, water is poured into the casing, only the casing is extracted from the ground, and the drain material is buried around the drain material.The anchor plate is attached to the lower end. After the attached casing penetrates into the ground by a driving machine, the casing is added and the casing is penetrated to a predetermined depth of the ground, and then a drain material having a cap for connection with the anchor plate attached to the lower end is inserted into the casing. After connecting the anchor plate and the connection cap, water is poured into the casing and the case is Withdrawn Gunomi from ground, and consisting of punching 設方 Method to ground drain material backfilled around the drain member.

Further, after inserting a drain material having a property of shrinking by its own weight in the vertical direction having an anchor plate attached to one end and a suspending wire attached to the other end into the casing, the drain material is vertically moved downward by its own weight. While preventing shrinkage, it penetrates into the ground with a casting machine together with the casing, adds the casing and drain material, penetrates to a predetermined depth in the ground, and prevents the drain material from shrinking vertically downward by its own weight with the suspension wire It also features a method of pouring water into the casing, extracting only the casing from the ground, and placing the drain material back to fill the periphery of the drain material into the ground, and driving the casing with an anchor plate attached to the lower end. After penetrating the ground by the construction machine, adding the casing and penetrating the casing to the specified depth of the ground, A cap for connection with an anchor plate, and a drain material having a property of contracting by its own weight in the vertical direction with a hanging wire attached to the other end are inserted into the casing, and the anchor plate and the cap for connection are connected. After that, the suspension material is used to prevent the drain material from shrinking vertically downward by its own weight while being poured into the casing, pulling out only the casing from the ground, and burying the drain material back into the ground, filling the periphery of the drain material. Configuration method.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, with reference to the drawings, embodiments of a work procedure for driving a drain material into the ground by applying the method of driving a drain material to the ground according to the present invention will be described. First,
The casting method of the present invention is basically used, for example, for geological surveys and the like in the ground where existing heavy structures for oil penetration such as oil tanks needing to perform ground improvement and where heavy machinery for casing penetration is not allowed. By using a simple boring machine such as a small boring machine to penetrate the casing, the drain material inserted into the casing is left in the ground, and the casing is pulled out. However, a drain material is inserted into a casing in advance and a drain material is inserted into the ground first, and a drain material is inserted after the casing is inserted into the ground and a drain material is inserted later. The work procedure in the embodiments will be described.

The drain material used in the present embodiment is a spiral core material with a filter material attached thereto, and has a property of contracting in the vertical direction due to the weight of the drain material.

First, a description will be given of an operation procedure of an embodiment of the present invention based on the above-mentioned drain material pre-loading method. As shown in FIG. 1, a drain material 1 carried into a site is appropriately cut to a required length, and one end thereof is provided. The drain plate 1 is assembled by attaching the anchor plate 2 and connecting the cap 5 to which two suspension wires 3 composed of suspension wires and fixed wires are attached to the other end.

Next, as shown in FIG.
The drain material 1 assembled as described above is prepared from the cap 4 side, and the drain material 1 is set in the casing. When the drain material 1 is set in the casing, A guide rope or the like is set in the casing 5 in advance to make it easier to pull in.

Subsequently, the casing 5 is set on the driving machine 6 as described above as shown in FIG. 3. At this time, the casing 5 is locked by the power lamp 7, and the drain material 1 in the casing 5 is shown. The hanging wire 3 is connected to the joint 8 of the drill head 10 of the setting machine 6 by a swivel joint (not shown), and the casing 5 is set by aligning the core of the casing 5 with the joint 8.

If the ground into which the casing is driven is loose, the drill bit 30 at the end may not be necessary. Hereinafter, the drill bit 30 is omitted from the figure. Next, the joint portion 8 of the drill head 10 and the casing 5 are connected as shown in FIG. 4, and the power clamp 7 is released. At this time, attention is paid to the anchor plate 2 at the tip, and no deformation or detachment occurs. Handle as follows.

Further, in the state of the set of casings 5 shown in FIG. 5, the position of the guide cell 9 is vertically adjusted by a level or transit in the direction of arrow X to adjust the casing 5 to the final casting position as shown by arrow Y. On the other hand, the drain material 1 is in a state of being suspended by the suspension wire 3. Next, as shown in FIG. 6, after confirming the driving position, the tip of the anchor plate 2 is aligned with the ground G, and the drill head 10 is rotated.

With this, the casing 5 is driven, but the proper rotation speed R and the driving speed D are maintained, and the casing 5 penetrates into the ground G by the driving machine 6 and is driven down. If there is any abnormality, the casing 5 is stopped immediately, and the casing 5 is driven to the design depth or the replenishment depth of the casing 5.

Here, the casing 5 is generally 3
m, it is necessary to add the casing 5 to the design depth, so as shown in FIG. 7, the casing 5 is locked by the power clamp 7 and the screw of the joint 8 of the drill head 10 is removed. The drill head 10 rises to the arrow L and separates from the casing 5.

Next, the cap 4 portion of the drain material 1 in the driven casing 5 is lifted by a suspension wire to prevent the drain material from shrinking downward by its own weight, and as shown in FIG. Is prepared on site, and a drain material 1 having a necessary length to be connected to the drain material 1 is prepared.
Insert into the casing 5. Here, when it is not necessary to join the drain material 1, it passes through the casing connecting only the hanging wire 3 and is connected to the joint portion 8 of the drill head 10 by a swivel joint (not shown).

That is, the drain material 1 in the driven casing 5 is connected to the drain material 1 connected thereto, and if it is not necessary to connect the drain material 1, the drain material 1 is passed through the casing 5 connected to the suspension wire 3 and set. Then, prepare the intermediate casing.

Next, as shown in FIG. 9, the suspension wire 3 of the drain material 1 in the casing 5 is attached to the joint portion 8 of the drill head 10 by a swivel joint (not shown), and the prepared casing 5 is started up and driven. The casing 5 is connected to the next intermediate casing 5 as shown by the arrow J, the casing 5 is aligned with the core of the drill head 10, and the drill head 10 is lowered.

Furthermore, as shown in FIG. 10, the drill head 10 is rotated to tighten the screw between the casing 5 and the joint portion 8 and to add the driving casing 5 to the casing 5.
After confirming the connection of the joint J with the joint, the power clamp 7 is loosened and the lock is released. Next, as shown in FIG. 11, the drill head 10 is rotated to drive the intermediate casing 5, and the same attention should be paid to the driving of the casing shown in FIG.

FIG. 12 shows the completion of the driving of the intermediate casing 5 described above. Thereafter, the procedure after the step of releasing the casing of FIG. When the casing 5 is driven to the installation depth, the driving is completed.

When the casing 5 is pulled out from the above-described driving completed state, since the inside of the casing 5 is in a dry state, a large muddy water pressure is applied to the tip of the casing 5,
In order to prevent inflow of muddy water, it is necessary to inject water into the casing 5 to reduce the water pressure difference.

Then, after stopping the driving machine 6 as shown in FIG. 12, and confirming the driving height, the pouring hose 11 from the prepared pouring pump is connected to the pouring coupler 12 of the pouring machine 6 as shown in FIG. Connecting. Next, as shown in FIG. 14, the water injection pump is operated to perform water injection indicated by an arrow W, and the casing 5
After confirming the overflow of the water injection W from, the water injection pump is stopped.

Then, as shown in FIG.
0, the casing 5 is pulled out, the casing 5 is pulled out, water injection W is performed again, overflow from the casing 5 is confirmed, and the casing 5 is pulled out in the direction of the arrow P. During that time, water injection W and overflow from the casing 5 continue. And the operation of pulling out the casing 5 are sequentially repeated, and depending on the situation, it is assumed that the water injection W and the arrow P are drawn out until the middle casing 5 is pulled out.

Next, as shown in FIG. 16, the casing 5 is pulled out as indicated by an arrow P. In a state where the casing 5 is pulled out to the connecting portion position of the intermediate casing 5, the lower casing 5 is locked by the power clamp 7, and the casing 5 is pulled out. 5. Reverse the drill head 10 in the direction to loosen the screw between the joint 5 and 5 and
The screwing of the joint portion 8 is released, the joint between the casings 5 is released, and the connection of the casing 5 is released.

Subsequently, as shown in FIG. 17, the casing 5 is pulled up, and the drain material 1 in the casing 5 is pulled up.
The fixing wire of the suspension wire 3 is temporarily fixed to the driving machine 6 to prevent the drain material from shrinking in the vertical direction by its own weight, and the drain material 1 attached to the joint portion 8 side of the drill head 10 by a swivel joint. Hanging wire 3
Is released from the cap 4 of the drain material 1 and the intermediate casing 5 is suspended by the dedicated jig 14 using the other suspension wire 3. Note that the drain material may be held manually without using the fixing wire of the suspension wire 3.

Next, as shown in FIG. 18, the joint 8 between the intermediate casing 5 and the drill head 10 is released,
The intermediate casing 5 is pulled out sideways, at which time the drill head 10 is lowered, and the middle casing 5 is pulled sideways in accordance with the descent, and the casing 5 is taken out. In addition, it is also possible to pull out the intermediate casing 5 by human power without using the special jig 14 and the hanging wire 3.

After releasing the casing of FIG. 18, the drill head 10 is lowered as shown in FIG. 19, and the cap 4 of the drain material 1 in the casing 5 into which the suspension wire 3 attached by the swivel joint is driven into the joint portion 8 side. And the fixing wire temporarily fixed to the setting machine 6 is inserted into the casing 5, and the joint 5 of the casing 5 and the drill head 10 is connected using the power clamp 7 and the drill head 10. Pull out in the direction of arrow P as shown in FIG.

Next, as shown in FIG. 21, the casing 5 is pulled out in the direction of the arrow P, and the operation steps from disconnection of the casing in FIG. 16 to FIG. 21 are repeated to pull out the casing 5 at the tip. 22, after pulling out the casing 5 at the tip, pull up the hanging wire 3 to a position where the end of the drain material 1 can be confirmed, pull out the drain material 1 from the drilled hole, and place an arrow around the drain material 1 in the drilled hole. The backing is performed as shown in B to prevent the drain material 1 from contracting in the vertical direction by its own weight, and the hanging wire is removed. Thereby, the placement of the drain material 1 is completed.

The installation of one drain material 1 on the ground G is completed by the procedures shown in FIGS. 1 to 22. Thereafter, when the next drain material 1 is installed, as shown in FIG. Then, in order to set the next drain material 1 on the casing 5, the drill head 1 is pulled up in an arrow P direction to an appropriate position, and the drill head 1 is locked with the casing 5 locked by the power clamp 7.
In order to prevent the casing 5 from dropping, the tip of the drain hanging wire 3 in the casing 5 is fixed with a special jig 14 in order to prevent the casing 5 from dropping.

Next, as shown in FIG. 24, the lock of the power clamp 7 is released, the casing 5 is lowered, the drill head 10 is lowered, and at the same time, the casing 5 is further lowered. That is, as shown in FIG. 25, the drill head 10 is lowered to the height at which the casing 5 is released, and the casing 5 is pulled laterally in the direction of arrow H to stabilize.
0, remove the joint screw with the joint 8
Then, the next drain material 1 is set, and the next drain material 1 is driven according to the procedure described above with reference to FIG. 23 to 25, the casing 5 is held by using a hanging wire and a dedicated jig, but it is also possible to hold the casing 5 manually without using these.

Next, the working procedure of another embodiment of the present invention based on the above-mentioned drain material insertion method will be described.
As shown in FIG. 26, the casing 5 is set on a driving machine 6 such as a simple boring machine similar to the above, the casing 5 is locked by the power clamp 7, and the core of the joint 5 of the casing 5 and the drill head 10 is aligned. Match. At this time, the anchor plate 2 shown in FIGS. 42 and 43 is attached to the end of the casing 5 at the front end.

Next, as shown in FIG. 27, the joint portion 8 of the drill head 10 and the casing 5 are connected, and the power clamp 7 is released. Shall be handled so as not to occur. Then, the casing 5 is set as shown in FIG. 28, and the fall of the arrow X is adjusted so that the fall of the guide cell 9 is made vertical by a level or a transit.
The position of the arrow Y for adjusting the casing 5 to the final casting position is adjusted.

Next, as shown in FIG. 29, after confirming the driving position, the tip of the anchor plate 2 is adjusted to the ground G, and the drill head 10 is rotated. The rotation is performed below.

Therefore, the casing 5 is driven, but the proper rotation speed and the driving speed must be maintained, and the casing 5 should be driven down. Thus, the design depth or casing 5
The casing 5 is driven to the replenishment depth.

In general, since the length of each casing 5 is 3 m, it is necessary to add the casing 5 in order to drive the casing 5 at the designed depth. As shown in FIG.
After the casing 5 is locked and the connection screw portion of the joint portion 8 of the drill head 10 is removed, the drill head 10 is lifted to release the casing 5 from the casing 5.

Then, as shown in FIG. 31, the casing 5 is pulled up, the casing 5 is connected, the cores of the drill head 10 and the casing 5 are aligned, and an intermediate casing for lowering the drill head 10 is prepared. Next, as shown in FIG. 32, the drill head 10 is rotated, the screw for joining the casing 5 is tightened, the connection J of the joint connection portion of the casing 5 is confirmed, and the power clamp 7 is loosened to release the lock. Make a casing connection.

Thereafter, as shown in FIG.
In this case, the same considerations as in the case described with reference to FIG. 29 are taken into account, whereby the driving of the casing 5 is performed, and the intermediate casing 5 thus added is replaced with the intermediate casing 5 shown in FIG. When the driving is completed and the driving is completed, the procedure after the release of the casing in FIG. 30 is repeated again, the intermediate casing 5 is driven, and the driving is completed when the driving is performed to the designed driving depth.

Next, as shown in FIG. 35, the casing 5 is locked by the power clamp 7, and the screw at the joint of the joint 8 is loosened to separate the casing 5 from the drill head 10.
The drill head 10 is pulled up to an appropriate position where the drain material 1 shown in FIG. 36 can be easily inserted. Then, as shown in FIG. 36, one end of the drain material 1 can be connected to the connecting male claws 16 provided on the anchor plate 2 of FIGS.
41 and a connecting cap 18 provided on the lower surface with connecting female claws 17 as shown in FIG. 41, and a drain material 1 for attaching two hanging wires 3 to the other end. The above drain material 1 is inserted therein.

Next, as shown in FIG.
Temporarily fix the head of the drain material 1, insert the push rod 19 into the drain material 1 while assembling, push the tip of the drain material 1 with the push rod 19, and connect the connecting female of the connection cap 18 at the tip of the drain material 1. The nail 17 is connected to the male nail 16 of the anchor plate 2 and the anchor plate 2 is connected.
And drain material 1 are connected. In addition, you may hold | maintain by human power, without temporarily fixing with the fixed hanging wire 3. FIG.

Thereafter, as shown in FIG. 38, the drill head 10 is lowered to a position suitable for setting the suspension wire 3, and the suspension wire 3 is connected to the joint 8 of the drill head 10 by a swivel joint (not shown). , Suspension wire 3 for fixing temporarily fixed to the driving machine 6
Remove.

Next, as shown in FIG. 39, the casing 5 is locked by the power clamp 7, the screw portion of the joint portion 8 is tightened and connected, and the power clamp 7 is released to connect the drill head.

Following the above, the working procedure for performing water injection W when pulling out the driven casing 5 and pulling out the casing 5 will be described with reference to FIGS.
2 to FIG. 15 in the embodiment based on the material first-in system described up to FIG.
Since the procedure of pulling out the casing 5 and removing the intermediate casing 5 from 6 to FIG. 22 is performed, the description thereof is omitted here.

In the other embodiments described with reference to FIGS. 26 to 39, the connecting male claws 16 of the anchor plate 2 are used.
In contrast, the pushing rod 19 is used to connect the connecting female claws 17 of the connecting cap 18 attached to the tip of the drain material 1, but instead of using the pushing rod 19, FIG. It is also effective to use a weight 20 as shown in FIG.

The work procedure in this case is shown in FIGS.
After the driving to the design depth of the casing 5 is completed by the same operation procedure as described above, the drain material 1 is inserted into the casing 5.
9, the drain material 1 may rise together when the casing 5 is pulled out.
It is necessary to connect to the anchor plate 2 at the tip of.

Therefore, after the operation procedure of FIG. 34, the casing 5 is locked by the power clamp 7 and the connection portion of the joint 8 of the drill head 10 is unscrewed and removed from the casing 5 in FIG. Head 10
Is separated, the drill head 10 is pulled up to an appropriate position where the drain material 1 can be easily inserted, and the above-mentioned weight 20 is set when the drain material 1 is assembled in FIG.

Next, a suspension wire 3 composed of two suspension wires and a fixed wire is set on the drain material 1,
A drain material insertion operation for inserting the drain material 1 into the casing 5 is performed.

Therefore, as shown in FIG. 45, the head of the drain material 1 is temporarily fixed by the fixed hanging wire 3 and the drain material 1 is fixed.
After the weight 20 in the inside is moved up and down to connect the connection cap 18 at the tip of the drain material 1 and the anchor plate 2, the weight 20 is pulled up and removed from the drain material 1. In addition, you may hold | maintain by temporary power without temporarily fixing with the fixed hanging wire 3. FIG.

Next, the drill head 10 is lowered to connect the suspension wire 3 of the drain material 1 to the joint portion 8 of the drill head 10 by a swivel joint (not shown), and the suspension wire for fixing temporarily fixed to the setting machine 6. 3 is removed and inserted into the casing 5.

After the connection of the anchor plate 2 and the drain material 1, the casing 5 is locked by the power clamp 7 shown in FIG. 39, and the screw portion of the joint 8 of the drill head 10 is tightened and connected to release the power clamp 7. After the operation of connecting the drill head, the casing 5 is pulled out through the same operation procedure as in FIGS.
The placement of the drain material 1 is completed.

The outer diameter of the connecting female nail 17 provided at the lower end of the connecting cap 18 shown in FIGS. 40 and 41 and the connecting male nail provided on the upper side of the anchor plate 2 shown in FIGS. 42 and 43. For example, a difference of about 10 mm is provided between the outer diameter of the connecting member 16 and the connecting female claw 17 so that the connecting female claw 17 and the connecting male claw 16 are easily engaged with each other, and a connection mechanism that is difficult to be separated is formed.

In the above embodiment, the drain material having the property of shrinking in the vertical direction by its own weight is used. However, when using the drain material which does not shrink in the vertical direction by its own weight, it is necessary to use a hanging wire to No steps are required to prevent it.

[0053]

According to the method for driving the drain material into the ground of the present invention described above, the drain material can be driven by using a simple driving machine such as a small boring machine. It is possible to easily and economically install drain materials even on the ground where large heavy equipment cannot enter, such as around the existing oil tank, and to install drain materials to prevent liquefaction. Become.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a drain material assembling explaining an operation procedure of an embodiment according to a material first-in system in which a drain material is driven by applying a method of driving a drain material to the ground according to the present invention.

FIG. 2 is an explanatory view of a drain material casing set continued from FIG. 1;

FIG. 3 is an explanatory view of the casing set following FIG. 2;

FIG. 4 is an explanatory view of the casing connection following FIG. 3;

FIG. 5 is an explanatory diagram of the casing position adjustment continued from FIG. 4;

FIG. 6 is an explanatory view of the driving of the casing following FIG. 5;

FIG. 7 is an explanatory view of the casing separation following FIG. 6;

FIG. 8 is an explanatory diagram of preparation of an intermediate casing subsequent to FIG. 7;

FIG. 9 is an explanatory view of the intermediate casing connection following FIG. 8;

FIG. 10 is an explanatory view of the drill head connection continued from FIG. 9;

FIG. 11 is an explanatory view of driving of the intermediate casing following FIG. 10;

FIG. 12 is an explanatory diagram of the completion of the driving following FIG. 11;

FIG. 13 is an explanatory view of the water injection hose set following FIG. 12;

FIG. 14 is an explanatory diagram of water injection following FIG. 13;

FIG. 15 is an explanatory view of water injection and withdrawal following FIG. 14;

FIG. 16 is an explanatory diagram of the casing disconnection following FIG. 15;

FIG. 17 is an explanatory view of the casing pulling up following FIG. 16;

FIG. 18 is an explanatory view following FIG. 17 of casing release.

FIG. 19 is an explanatory diagram of the first half of the setup change of the suspension wire following FIG. 18;

FIG. 20 is an explanatory diagram of the latter half of the operation following FIG. 19;

FIG. 21 is an explanatory diagram of the casing withdrawal following FIG. 20;

FIG. 22 is an explanatory view of the completion of drawing after FIG. 21;

FIG. 23 is an explanatory view of the preparation for removing the casing following FIG. 22;

FIG. 24 is an explanatory diagram of the casing being lowered following FIG. 23;

FIG. 25 is an explanatory view of removing the casing following FIG. 24;

FIG. 26 is an explanatory diagram of a casing set at a distal end for explaining an operation procedure using a pushing rod in another embodiment by a material insertion method in which a material is cast by applying the casting method of the present invention.

FIG. 27 is an explanatory diagram of the casing connection following FIG. 26;

FIG. 28 is an explanatory diagram of the position adjustment continued from FIG. 27;

FIG. 29 is an explanatory diagram of the driving of the casing following FIG. 28;

FIG. 30 is an explanatory view of the release of the casing following FIG. 29;

FIG. 31 is an explanatory view of the preparation of the intermediate casing following FIG. 30;

FIG. 32 is an explanatory view of the casing connection following FIG. 31.

FIG. 33 is an explanatory view of the driving of the casing following FIG. 32;

FIG. 34 is an explanatory diagram following FIG. 33 of completion of driving of the casing.

FIG. 35 is an explanatory view of releasing the drill head following FIG. 34;

FIG. 36 is an explanatory diagram of the drain material set following FIG. 35;

FIG. 37 is an explanatory view of the connection between the anchor plate and the drain material by the pushing rod continued from FIG. 36;

FIG. 38 is an explanatory diagram of the hanging wire set continued from FIG. 37.

FIG. 39 is an explanatory view of the drill head connection continued from FIG. 38.

40 is a side view showing a partial cross section of a connection cap for connecting the anchor plate and the drain material in FIG. 37.

FIG. 41 is a plan view seen from the lower surface of FIG. 40.

42 is a side sectional view of the anchor plate connected to the connection cap of FIG. 40 taken along the line AA in FIG. 43.

FIG. 43 is a plan view as seen from above in FIG. 42;

FIG. 44 is an explanatory diagram of an example in which a drain material is inserted into a casing using the weights according to the other embodiments shown in FIGS. 26 to 39.

FIG. 45 is an explanatory view of the connection between the unplate and the drain material, following FIG. 44;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drain material 2 Anchor plate 3 Suspension wire 5 Casing 6 Casting machine 18 Connection cap 19 Push rod 20 Weight G Ground W Water injection

Claims (4)

[Claims] After inserting a drain material having an anchor plate attached to one end into a casing, the drain material is penetrated into the ground together with the casing by a driving machine, and the casing and the drain material are added to penetrate to a predetermined depth of the ground. After that, water is poured into the casing, only the casing is extracted from the ground, and the drain material is buried around the drain material. 2. A casing having an anchor plate attached to a lower end thereof is penetrated into the ground by a driving machine, a casing is added to penetrate the casing to a predetermined depth of the ground, and a cap for connection with the anchor plate is attached to a lower end. After inserting the drain material into the casing, connecting the anchor plate and its connection cap, water is poured into the casing, and only the casing is extracted from the ground,
And the method of placing the drain material back on the ground to fill the drain material around. 3. After inserting a drain material having a property of shrinking by its own weight in the vertical direction having an anchor plate attached to one end and a suspending wire attached to the other end into the casing,
Using a suspension wire to prevent the drain material from shrinking vertically downward by its own weight, penetrate the ground with a casting machine together with the casing. A method of pouring drain material into the ground while preventing the material from shrinking vertically downward by its own weight, pouring water into the casing, extracting only the casing from the ground, and filling back around the drain material. 4. A casing having an anchor plate attached to a lower end is penetrated into the ground by a driving machine, and the casing is added to penetrate the casing to a predetermined depth of the ground. Then, a drain material having a property of contracting by its own weight in the vertical direction with a hanging wire attached to the other end is inserted into the casing, and the anchor plate and the connection cap are connected to each other. A method of pouring drain material into the ground, injecting water into the casing, extracting only the casing from the ground, and filling back around the drain material while preventing shrinking vertically downward by its own weight.