JPH11117284A - Ground improvement construction method, its ground drainage member and work execution device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ground improvement construction method capable of executing the work of a ground drainage member at low cost by restraining noise and vibration and improving drainage efficiency by preventing damage of a drip hole member at the time of work execution after securing the drainage efficiency, its foundation drainage member and a construction device. SOLUTION: A ground drainage member 1 is constituted of a sheet pile 2 to press in a foundation and a drip hole member 4 for burying provided in the longitudinal direction along a web 3 of this sheet pile 2 and is constituted by providing a protective member 5 of a plate type having width to protect its outside surface on the outside of this drip hole member 4. Additionally, a construction device 11 of the foundation drainage member is constituted by providing a drip hole member supply means 15 and a protective member supply means 16 on an upper part of a mast 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground improvement method, a ground drainage member, and a construction apparatus, and more particularly, to a ground drainage member which can be installed at low cost while suppressing noise and vibration and can improve drainage efficiency. The present invention relates to a ground improvement method, a ground drainage member, and a construction device.

[0002]

2. Description of the Related Art Various ground drainage members and construction methods have been used to improve and strengthen soft ground. The applicant has
A method and an apparatus for improving the ground by press-fitting a simple draining member along the web of steel sheet pile into the ground with a pile press-in / draw-out machine have been previously proposed (Japanese Patent Laid-Open No. 9-221738).
No.). According to the ground improvement method and the apparatus, the ground drainage member can be installed at low cost while suppressing noise and vibration during the installation, and the drainage can be efficiently performed.

[0003]

However, the above-described method and apparatus for improving the ground may be damaged by stones or the like when the ground contains stones or the like, and may be damaged by the geology of the ground to be pressed. There is a problem that clogging occurs, and as a result, drainage efficiency is reduced.

An object of the present invention is to provide a ground improvement method capable of constructing a ground drainage member at low cost while suppressing noise and vibration and improving drainage efficiency, a ground drainage member, and a construction apparatus. .

[0005]

In order to solve the above-mentioned problems, a ground comprising a sheet pile for press-fitting into the ground and a drainage member for embedding provided along the web of the sheet pile in the longitudinal direction thereof. In the drainage member, a plate-shaped protection member having a width capable of protecting the outer surface of the drainage member is provided outside the drainage member.

The ground drainage member is provided with a plate-like protection member having a width capable of protecting the outer surface of the embedding drainage member provided along the web of the sheet pile. When the ground drainage member is pressed into the ground by a pile press-fitting means such as a press-in pull-out machine, the outer surface of the drainage member is protected by the protection member.

The protection member is fixed to the lower end of the sheet pile and a fixing member such as a shear pin which can be broken by a predetermined tensile force acting on the protection member is provided. If the frictional force exceeds the applied frictional force and the range is smaller than the tensile strength of the protection member, the protection member is fixed by the fixing member, so that the drainage member is surely protected by the protection member at the time of press-fitting. By pulling the protective member with a force exceeding the pulling force, the fixing member is broken and the protective member can be separated from the sheet pile side, so that the protective member can be collected after press-fitting and used repeatedly, and drainage can be performed. The contact area between the member and the ground increases, and the drainage capacity can be maximized.

The ground drainage member includes a pile press-in means for pressing a sheet pile into the ground, and a water draining member supply means for supplying a drainage member for embedding along a web corresponding to the press-fitting of the sheet pile. In the construction apparatus, there is provided a protection member supply means for supplying a plate-shaped protection member having a width capable of protecting the outer surface of the water draining member to the outside in correspondence with the press-fitting of the sheet pile.

The protection member supply means supplies a plate-like protection member to the outside of the drainage member in response to the press-fitting of the sheet pile, and the protection member protects the outer surface of the drainage member. The ground drainage member construction device of the present invention enables the ground drainage member to be buried in the ground while avoiding damage to the drainage member, so that the drainage capacity is secured and efficient drainage of the construction area is achieved. It becomes possible.

When the protection member is provided with a recovery means for pulling back the protection member with a predetermined pulling force sufficient to recover the protection member, the protection member is fixed to the sheet pile within a predetermined pulling force, thereby draining water at the time of press-fitting. Since the member is reliably protected and the protection member can be separated from the sheet pile side by pulling back the protection member with a force exceeding a predetermined tensile force by the protection member recovery means, the protection member can be recovered after press-fitting. And the contact area between the drainage member and the ground increases, and the drainage capacity can be maximized.

The protection member supply means includes a rotatable reel having the protection member wound in a coil shape, and a winding drive mechanism for winding and driving the reel with a predetermined pulling force sufficient to recover the protection member. In this case, both the supply operation of the protection member and the recovery operation thereof can be performed by the protection member supply means having a simple configuration using a reel having a winding drive mechanism.

When a sheet pile is press-fitted by using a pile press-fitting means, a ground drainage member is disposed along the web of the sheet pile in the longitudinal direction thereof, so that the ground comprising the sheet pile and the drainage member is provided. In a ground improvement method in which a drainage member is formed in the ground, a protection member for protecting the outside of the drainage member is provided, and the protection member is removed and recovered after the ground drainage member is pressed into the ground. In this case, when the sheet pile and the drainage member are press-fitted, the outer surface of the drainage member is protected by the protection member, and the drainage member is press-fitted without receiving friction with the ground. Further, since the protection member is removed and collected after the press-fitting of the ground drainage member, the drainage member is in direct contact with the ground to ensure the drainage function.

A water jet hose is press-fitted together with the protective member. At this time, a jet water flow is supplied to the periphery of the draining member by the water jet hose, and after the press-fitting, ground improvement processing is performed to collect the water jet hose together with the protective member. In this case, the draining member is protected by the protective member, and the jet water flow reduces the press-in resistance of the sheet pile, and at the same time, the fine soil particles such as humus soil and clay in the ground are washed away. A sandy band having water permeability mainly made of sandy material is formed on the peripheral portion, and the drainage member is directly in contact with the sandy band, thereby preventing clogging of the drainage member and extending the drainage function for a long time. The protection member and the water jet hose can be used repeatedly.

In a ground drainage member comprising a sheet pile for press-fitting into the ground and a drainage member for embedding provided in the longitudinal direction along the web of the sheet pile, a sandy band is formed around the drainage member. When a water jet hose that supplies a jet water flow for forming is provided, the jet water flow can be supplied by the water jet hose when the ground drainage member is pressed in, so that the press-in resistance of the sheet pile is reduced, The fine soil particles such as humus soil and clay in the ground are washed away, and by this washing action, a sandy permeable zone mainly made of sand is formed at the periphery of the drainage member. Is prevented, and the drainage function can be maintained for a long time.

In the case where the water jet hose is provided detachably with respect to the sheet pile side, the water jet hose is press-fitted together with the sheet pile, detached from the sheet pile side if necessary, and recovered, thereby reusing the water jet hose. can do.

A soil drainage member installation apparatus comprising: a pile press-in means for pressing a sheet pile into the ground; and a water draining member supply means for supplying a drainage member for embedding along a web corresponding to the press-fitting of the sheet pile. In the case where a water jet hose supplying means for supplying a water jet hose for supplying a jet water flow for forming a sandy zone around the drainage member in correspondence with the press-fitting of the sheet pile is provided, A jet water stream can be supplied by a water jet hose at the time of press-fitting, so that the press-fitting resistance of the sheet pile is reduced, and fine soil particles such as humus soil and clay in the ground are washed away. A sandy band mainly made of sand and having a water permeability is formed on the periphery of the sand belt, and the sandy band prevents clogging of the drainage member, and has a drainage function. It can be maintained for a period.

In the case where the water jet hose is provided with a recovery means for pulling back the water jet hose, the water jet hose is re-used by press-fitting the water jet hose together with the sheet pile, detaching the water jet hose from the sheet pile side as required by the recovery means, and recovering the water jet hose. can do.

When a sheet pile is press-fitted using a pile press-fitting means, a ground drainage member is disposed along the web of the sheet pile in the longitudinal direction thereof, so that the ground comprising the sheet pile and the drainage member is provided. In a ground improvement method in which a drainage member is formed in the ground, a ground improvement process is performed to press-fit a sheet pile and a drainage member while supplying a jet water flow for forming a sandy zone around the periphery of the drainage member. In this case, when the ground drainage member is pressed, a jet stream can be supplied to the periphery of the sheet pile and the drainage member, so that the pressure resistance of the sheet pile can be reduced and fine soil such as humus and clay in the ground can be reduced. The soil particles are washed away, and by this washing action, a sandy zone mainly made of sand and having water permeability is formed at the periphery of the drainage member. The sandy band prevents the drainage member from being clogged, and has a drainage function. For a long time It is possible to maintain me.

In a ground drainage member comprising a sheet pile for press-fitting into the ground and a drainage member for embedding provided in the longitudinal direction along the web of the sheet pile, the drainage member is provided outside the drainage member. If a plate-shaped protection member having a width capable of protecting the outer surface of the member and a water jet hose for supplying a jet water flow for forming a sandy belt around the drainage member are integrally provided, the protection is provided. By providing the member and the water jet hose, it becomes possible to protect the drainage member and prevent clogging due to the sandy band. Further, since the above both are provided integrally, it can be handled as an integrated auxiliary member. Thus, troublesome handling can be avoided.

When the water jet hose is provided along both edges of the protection member, the water jet hose and the protection member can be easily handled by a reel integrally wound in a coil shape.

A ground drainage member construction apparatus comprising: a pile press-in means for pressing a sheet pile into the ground; and a water draining member supply means for supplying a drainage member for embedding along a web corresponding to the press-fitting of the sheet pile. , A plate-like protection member having a width capable of protecting the outer surface of the drainage member, and a water jet hose for supplying a jet water flow for forming a sandy band around the drainage member Is provided on both edges of the protective member integrally in correspondence with press-fitting of the sheet pile, by providing a protective member and a water jet hose, the protection of the drainage member and the sandy band are provided. Clogging can be prevented, and an auxiliary member supply means for integrally supplying the above two members is provided. The construction apparatus of Soil drainage member can be simply constructed to avoid.

When the protection member and the water jet hose on both edges thereof are collectively pulled back,
By collecting the protection member and the water jet hose, it is possible to secure the drainage function of the drainage member of the ground drainage member for a long time and to reuse the protection member and the water jet hose. Since the water jet hose and the water jet hose can be wound in a coil shape as an integral auxiliary member and handled, the recovery means can be simply configured.

The auxiliary member supply means includes a rotatable reel integrally wound with a protection member and a water jet hose in a coil shape, and winds the reel with a predetermined pulling force sufficient to recover the auxiliary member. In the case of a winding drive mechanism that is driven, both the supply operation and the recovery operation of the protection member and the water jet hose can be performed by the auxiliary member supply means with a simple configuration using the reel equipped with the winding drive mechanism. Becomes

[0024]

FIG. 1 is an enlarged sectional view of a ground drainage member according to the present invention. The ground drainage member 1 is composed of a sheet pile 2 for press-fitting into the ground, a drainage member 4 for embedding provided along the side surface of the web 3 of the sheet pile in a longitudinal direction thereof, and an auxiliary member for press-fitting. Become. This auxiliary member is a draining member 4
A plate-shaped protection member 5 such as a steel plate, a synthetic resin plate, a rubber plate or the like having a width capable of protecting the outer surface thereof is provided on the outer side.

The drainage member 4 is a drainage pipe 6 formed of a cloth-like filter member made of synthetic resin through which water can pass and formed in a flat pipe shape, and a guide groove for securing a longitudinal guide groove therein. And a core material 7 made of a hard resin material. This draining member 4 can collect moisture contained in the ground and send it in the longitudinal direction while being buried in the ground.

FIG. 2 is a sectional view taken along line II-II of FIG.
When the ground drainage member 1 is press-fitted, the web 3
The lower end of the draining member 4 is fixed via an anchor 8 near the inner or outer lower end. The lower end of the protection member 5 is fixed to the lower end of the sheet pile 2 on the same side via a fixing member 9. The fixing member 9 uses a shear pin or the like that can be broken by a predetermined tensile force acting on the protection member 5.
Is set to a range that exceeds the frictional force received from the ground and is smaller than the tensile strength of the protection member 5.

When the ground drainage member 1 is constructed, the sheet pile 2
Is provided with a plate-like protection member 5 having a width capable of protecting the outer surface of the drainage member 4 for embedding provided along the ground. As the drainage member 1 is pressed into the ground, the drainage member 4 and the protection member 5 are closely attached along the web 3 of the sheet pile 2, and the outer surface of the drainage member 4 is protected by the protection member 5.

Therefore, the drainage member 4 of the ground drainage member 1 of the present invention is buried in the ground without being damaged by avoiding direct friction with the ground, and its drainage capacity is secured. Efficient drainage of construction area is possible.

At this time, since the protection member 5 is fixed by the fixing member 9 at the lower end, the water draining member 4 is surely protected at the time of press-fitting, and the protection member 5 is applied with a force exceeding a predetermined pulling force.
By pulling back, the fixing member 9 is broken and the protection member 5 can be separated from the sheet pile 2 side, so that the protection member 5 can be recovered and used repeatedly after press-fitting, and the drainage member 4 The contact area with the ground increases, and the drainage capacity can be maximized.

FIG. 3 is a side view showing an example of an apparatus for installing the ground drainage member shown in FIG. Ground drainage construction equipment 11
A draining member supply means 15 and a protection member on a top of the mast 13 of a general pile press-in / draw-out machine 14 comprising a press-in chuck 12 and a mast 13 for raising and lowering the pile, and serving as a pile press-in means for press-fitting a sheet pile into the ground. It is provided with a supply means 16. The pile press-in / pull-out machine 14 can construct a ground drainage member at low cost while suppressing noise and vibration.

The draining member supply means 15 is constituted by a rotatable reel in which the draining member 4 for embedding is wound in a coil shape, and drains along the web 3 corresponding to the press-fitting of the sheet pile 2. The member 4 is supplied.

The protection member supply means 16 is constituted by a rotatable reel around which a protection member 5 such as a thin steel plate is wound in a coil shape. In addition to supplying a plate-shaped protection member 5 having a width capable of protecting the outer side surface, a winding means (not shown) as a recovery means of the protection member for pulling back the protection member 5 with a predetermined tensile force sufficient for recovery. Built-in drive mechanism.

FIG. 4 is a sectional view taken along line IV-IV of FIG.
The both sides of the sheet pile 2 are gripped by the press-in chuck 12,
By press-fitting the sheet pile 2 into the ground, the draining member 4 and the plate-shaped protective member 5 having a width capable of protecting the outer surface thereof are closely contacted along the web 3 by the ground pressure, and the ground drainage member 1 is formed. Is done.

Since the ground drainage member 1 has the protection member 5 for the drainage member 4, the drainage member 4 is damaged even when a press-fitting chuck of a type for gripping the web 3 of the sheet pile 2 is used. Can be press-fitted without any pressure.

FIG. 5 is a view taken in the direction of the arrow V in FIG. The construction of the ground drainage member 1 by the construction device 11 is performed by gripping and fixing the sheet pile 2 to the press-fitting chuck 12 and extracting the drainage members 4 drawn out from the drainage member supply means 15 and the protection member supply means 16, respectively.
And the protection member 5 are attached to the lower end of the sheet pile 2 and then press-fitted by the press-fitting chuck 12.

The press-in chuck 12 loosens its grip at its lower limit position to release the sheet pile 2 and rises up. At this ascending position, it again grips the sheet pile 2 and repeats the press-in operation. According to this press-fitting operation, the drainage member 4 and the protection member 5 are pulled out from the drainage member supply means 15 and the protection member supply means 16, respectively.

When the ground drainage member 1 is press-fitted to a predetermined depth, the drainage member 4 is cut by a cutter or the like, and the protection member supply means 16 is driven for winding. The fixing member 9 is broken by the pulling force of pulling back the protection member 5 by the winding drive, the protection member 5 can be separated from the sheet pile 2 and collected, and the contact area between the drainage member 4 and the ground is secured. As a result, water can be efficiently collected from the ground.

FIG. 6 is an enlarged sectional view showing a construction state in which the ground drainage member of FIG. 1 is formed in a pile wall shape. Ground drainage member 1
Is formed in a pile wall shape, a draining member 4 is disposed on the draining area A side, and the sheet pile 2 is connected to the joints 2 on both sides thereof.
The protective member 5 is recovered each time it is press-fitted so as to be connected by a and 2a. In addition, the drainage member 4 is disposed on the surface of the outer peripheral area B according to the amount of water discharged from the ground.
The draining members 4 are arranged on both sides of the web 3 by using a construction apparatus provided with a punching member supply unit and a protection member supply unit on both surfaces of the sheet pile web 3.

FIG. 7 is a plan view of a drainage area where the ground drainage member of FIG. 1 is constructed. This is an example in which the ground drainage member 1 is formed into a pile wall shape to form a waterproof pile wall made of sheet pile, and the inside thereof is used as a drainage area. A drainage section A is formed by connecting the upper end of the drainage member with a water guide pipe (not shown) and providing a suction pump 17 and a discharge pipe 18 to drain the water outside the area.

For example, by forming a drainage area A surrounding the foundation ground of a heavy structure C such as a petroleum tank in a seaside area, the soft ground is improved and strengthened to prevent uneven settlement of the ground due to the weight of the structure. In addition, it is possible to prevent collapse of the structure due to liquefaction during an earthquake.

As described above, the protection member supply means of the construction device for the ground drainage member supplies a plate-like protection member to the outside of the drainage member in response to the press-fitting of the sheet pile, and the protection member supplies the plate-like protection member. Since the outer side surface is protected, the construction apparatus of the ground drainage member of the present invention can bury the ground drainage member 1 in the ground while avoiding damage to the drainage member. As a result, efficient drainage of the construction area is possible.

Since the construction device for the ground drainage member includes a protection member collecting means for pulling back the protection member with a predetermined tensile force sufficient for collecting the protection member, the protection member is attached to the sheet pile within a predetermined tensile force range. Since the draining member is reliably protected at the time of press-fitting by fixing the protection member, the protection member can be separated from the sheet pile side by pulling the protection member with a force exceeding a predetermined pulling force by the recovery means of the protection member. After the press-fitting, the protection member can be collected and used repeatedly, and the contact area between the drainage member and the ground increases, so that the drainage capacity can be maximized.

The protection member supply means comprises a rotatable reel having the protection member wound in a coil shape, and a winding drive mechanism for winding and driving the reel with a predetermined pulling force sufficient to recover the protection member. Therefore, the protection member supply means has a simple configuration with a reel having a winding drive mechanism,
The collecting operation can be performed together with the supplying operation of the protection member.

The ground drainage member 1 is press-fitted into a pile wall shape by opening a part of the periphery of the drainage area A in accordance with the characteristics of the structure to be supported, the state of water discharge from the ground, and the like. It is clear that the same operation as described above can be achieved also in the case of separately press-fitting and installing, so the description thereof will be omitted.

Next, another embodiment will be described. FIG. 8 is a view similar to FIG. 1 showing another embodiment of the ground drainage member of the present invention. In the following, the same members as those described above are denoted by the same reference numerals, and description thereof is omitted. The ground drainage member 21 includes a water draining member 4, a protection member 5, and a water jet hose 22 along one or both sides of the web 3 of the sheet pile 2. The water jet hose 22 sends a high-pressure jet water stream to the tip of the sheet pile 2 when the sheet pile 2 is press-fitted, and collects it together with the protective member 5 after the sheet pile 2 is press-fitted. The protection member 5 and the water jet hose 22 together form an auxiliary member for press-fitting.

FIG. 9 is a view similar to FIG. 5 of an apparatus for installing the ground drainage member of FIG. A rotatable reel around which a water jet hose 22 is wound in a coil shape is provided below the protection member supply means 16 of the device 11, and a hose drive means 23 is built in the reel by incorporating a winding drive mechanism (not shown). And connected to a high-pressure water supply source (not shown).

The water jet hose 22 has a nozzle 22a at its tip, and this nozzle 22a is fixed to the lower end of the protective member 5 with the nozzle 22a facing downward. When the ground drainage member 21 is installed, the hose supply means 23 supplies the water jet hose 22 to the outside of the protection member 5 in correspondence with the press-fitting of the sheet pile 2 and jets the water jet hose 22 to the lower end of the sheet pile 2 through the nozzle 22a. Supply water flow J.

The high-pressure jet water flow J supplied to the tip of the sheet pile 2 through the water jet hose 22 relieves the press-in resistance of the sheet pile 2 and also flushes fine soil particles such as humus soil and clay in the ground. By this cleaning action, a sandy zone D mainly made of sand and having water permeability is formed on the periphery of the drainage member 4.

The sandy belt D is brought into direct contact with the surface of the draining member 4 by collecting the protective member 5 and the water jet hose 22 after the sheet pile 2 is press-fitted. Since clogging can be prevented, efficient drainage can be ensured for a long period of time, thereby enabling effective ground improvement.

As described above, the ground drainage member 21 including the sheet pile 2, the draining member 4, the protection member 5, and the water jet hose 22 is configured. By pressing the ground drainage member 21 into the ground, The sheet pile 2 serving as a press-fitting base material guides the drainage member 4 and the drainage member 4
Is protected by the protection member 5, and the water jet hose 22 supplies a jet stream to the tip of the sheet pile 2 to form a water-permeable sandy zone D around the draining member 4 of the ground drainage member 21. Can be the above sheet pile 2
By removing the protective member 5 and the water jet hose 22 while leaving the drainage member 4, the clogging of the drainage member 4 can be prevented due to the water permeability of the sandy zone D, so that efficient drainage can be secured for a long period of time. can do.

The above construction device for the ground drainage member includes a drainage member supply unit 15 for supplying the drainage member 4 together with the press-fitting of the sheet pile 2, a protection member supply unit 16 for supplying the protection member 5,
A water jet hose supply means 23 for supplying the water jet hose 22 while sending high pressure water is provided in the pile press-in means by a pile press-in / draw-out machine or the like, and the protection member supply means 16 and the water jet hose supply means 23 are shown in FIG. A winding drive mechanism (not shown) is provided, and the drainage member 4 is guided by press-fitting the sheet pile 2 by using this construction device. In addition, the drainage member 4 is protected. An effective ground-side improvement can be achieved by a ground-side improvement method in which a water flow is supplied and press-fitted.

FIG. 10 is a view similar to FIG. 1 showing a modification of the ground drainage member of FIG. The ground drainage member 24 includes a water jet hose 25,
25 as an integral auxiliary member. The water jet hoses 25, 25 are connected to the sheet pile 2 in the same manner as described above.
High-pressure jet water flow is sent to the tip of the sheet pile 2 at the time of press-fitting.
After the sheet pile 2 is press-fitted, it is collected together with the protection member 5.

FIG. 11 is a front view showing a main part of an apparatus for installing the ground drainage member shown in FIG. The device for constructing the ground drainage member includes a drainage member supply means 15 and a protection member 5.
And an auxiliary member supply means 26 for supplying the water jet hoses 25 and 25 collectively.

The auxiliary member supply means 26 comprises a protective member 5 and a rotatable reel in which water jet hoses 25 are wound on both sides thereof in a coil shape, and incorporates a winding drive mechanism (not shown). . The protective member 5 and the integral auxiliary member having the water jet hoses 25, 25 disposed on both sides thereof are provided with individual reels on the same support shaft as necessary. To constitute the auxiliary member supply means 26.

The water jet hoses 25, 25
Is connected to a high-pressure water supply source (not shown)
Is ejected from the reel in response to the press-fitting, and at the same time as the press-fitting, a jet water stream is jetted from a nozzle at the tip not shown. Further, the protection member 5 and the water jet hose 25,
25 is separated and collected from the sheet pile side by being taken up by a take-up driving mechanism after press-fitting and setting. The water jet hoses 25, 25 form a water-permeable sandy zone D around the periphery of the draining member 4 by injecting a jet water stream after press-fitting, if necessary.

The press-fitting of the ground drainage member is performed in the same procedure as described above, that is, the drainage member 4 and the protection member 5 are combined with the press-in operation of the sheet pile 2 by the drainage member supply means 15 and the auxiliary member supply means 26. And water jet hose 2
Supply 5,25. At this time, the protection member 5 and the water jet hoses 25, 25 are connected to the single auxiliary member supply means 2.
Since it is supplied and collected as an integral auxiliary member by 6, the construction of the construction apparatus can be simplified and the handling of the auxiliary member can be simplified.

The above-mentioned ground drainage member does not include a protection member,
If only a water jet hose is provided, the water jet hose performs its own function,
The structure of the ground drainage member and the construction device in that case is also clear, so the description is omitted.

[0058]

The ground improvement method, ground drainage member and construction device of the present invention have the following effects. In the ground drainage member composed of a sheet pile and a drainage member, a protection member for protecting the drainage member is provided, so that when the ground drainage member is pressed into the ground by a pile press-in means such as a pile press-in / pull-out machine, water is discharged. The outer surface of the punching member is protected by the protection member.

Therefore, the ground drainage member of the present invention is buried in the ground without damaging the drainage member, and its drainage capacity is ensured. Therefore, the ground drainage member can be reduced in cost by suppressing noise and vibration. Construction can be performed, and efficient drainage of the construction area becomes possible.

In the case where the protection member is fixed and a fixing member that breaks with a certain force is provided, the drainage member is securely protected by the protection member at the time of press-fitting because the protection member is fixed by the fixing member. By pulling the protection member with a force exceeding the predetermined pulling force, the fixing member is broken and the protection member can be separated from the sheet pile side,
After the press-fitting, the protection member can be collected and used repeatedly, and the contact area between the drainage member and the ground increases, thereby maximizing drainage capacity.

[0061] In the construction apparatus of the ground drainage member comprising the pile press-in means and the drainage member supply means, the protection member supply means is provided. To provide a plate-shaped protection member,
The protection member protects the outer surface of the drainage member.

Accordingly, the ground drainage member construction apparatus of the present invention can embed the ground drainage member in the ground while avoiding damage to the drainage member, thereby suppressing noise and vibration and reducing cost. The ground drainage member can be constructed, and the construction area can be efficiently drained.

In the case where the recovery means for pulling back the protection member is provided, the drainage member is reliably protected at the time of press-fitting by fixing the protection member to the sheet pile within a predetermined pulling force range. The protection member can be separated from the sheet pile side by pulling back the protection member with a force exceeding a predetermined pulling force by the collection means, so that the protection member can be collected and used repeatedly after press-fitting, and drainage can be performed. The contact area between the member and the ground increases, and the drainage capacity can be maximized.

When the protective member supply means comprises a reel and a take-up drive mechanism, the protection member supply means has a simple configuration using a reel having a take-up drive mechanism.
The collection operation can be performed together with the supply operation of the protection member.

In the ground improvement method of providing a drainage member along a sheet pile, in the case of providing a protection member for the drainage member at the time of press-fitting, and performing a ground improvement process for removing and collecting after the press-fitting, the sheet pile and the drainage member are required. The outer surface of the drainage member is protected by the protection member when press-fitting, and the water-draining member is press-fitted without receiving friction with the ground. Further, since the protection member is removed and collected after the press-fitting of the ground drainage member, the drainage member is in direct contact with the ground to ensure the drainage function.

When a water jet hose is press-fitted together with the protective member, a jet water stream is supplied to the periphery of the draining member, and after the press-fitting, when the ground improvement treatment is performed to collect the water jet hose together with the protective member, the protective member is used. The water draining member is protected by the water flow, and the jet water flow alleviates the press-in resistance of the sheet pile, and at the same time, the fine soil particles such as humus soil and clay in the ground are washed away. A water-permeable sandy belt made of high quality is formed, and the drainage member is in direct contact with the sandy belt, thereby preventing the drainage member from being clogged and maintaining its drainage function for a long time. Further, the protection member and the water jet hose can be used repeatedly.

When a water jet hose is provided in the ground drainage member including the sheet pile and the drainage member, a jet water flow can be supplied by the water jet hose when the ground drainage member is press-fitted. While mitigating the injection resistance, the fine soil particles such as humus and clay in the ground are washed away, and this washing action forms a sandy permeable zone mainly made of sand at the periphery of the draining member. The sandy band prevents the drainage member from being clogged, and can maintain its drainage function for a long time.

When the water jet hose is provided detachably with respect to the sheet pile side, the water jet hose is press-fitted together with the sheet pile, detached from the sheet pile side if necessary, and collected, so that the water jet hose can be reused. can do.

When the water jet hose supply means is provided in the ground drainage member construction device comprising the pile press-in means and the drainage member supply means, the jet water flow is supplied by the water jet hose when the ground drainage member is press-fitted. Since it can be supplied, it reduces the press-in resistance of the sheet pile, and also flushes out fine soil particles such as humus soil and clay in the ground, and this cleaning action increases the water permeability mainly composed of sand at the periphery of the drainage member. Thus, a clogging of the drainage member is prevented by the sandy band, and the drainage function can be maintained for a long time.

In the case where the water jet hose is provided with a collecting means for pulling back the water jet hose, the water jet hose is re-used by pressing the water jet hose together with the sheet pile, removing the water jet hose from the sheet pile side as required by the collecting means, and collecting the water jet hose. can do.

In the ground improvement method of providing a drainage member along a sheet pile, in a case where the ground improvement processing is performed so that a jet water flow is supplied to the periphery of the drainage member and the ground is drained, when the ground drainage member is press-fitted, A jet water stream can be supplied to the periphery of the sheet pile and the draining member, so that the press-in resistance of the sheet pile can be reduced and fine soil particles such as humus and clay in the ground are washed away. A sandy band mainly made of sand and having water permeability is formed on the peripheral portion, and the sandy band prevents the drainage member from being clogged, and can maintain its drainage function for a long time.

In the case of a ground drainage member composed of a sheet pile and a drainage member, when the protection member of the drainage member and the water jet hose are integrally provided, the protection member and the water jet hose are provided to drain the water. The protection of the members and the prevention of clogging due to the sandy belt can be achieved. Further, since both of the above members are provided integrally, the troublesome handling of each can be avoided by treating them as an integral auxiliary member.

When the water jet hose is provided along both edges of the protection member, the water jet hose and the protection member can be easily handled by a reel integrally wound in a coil shape.

In the construction apparatus including the pile press-in means and the draining member supply means, when the auxiliary member supply means for integrally supplying the protection member and the water jet hose is provided, the protection member and the water jet hose are provided. This makes it possible to protect the drainage member and prevent clogging due to the sandy belt.Furthermore, since the auxiliary member supply means for integrally supplying the above two members is provided, by treating this as an integral auxiliary member, The construction apparatus for the ground drainage member can be easily configured by avoiding the cumbersome handling of the above.

In the case where the protection member and the water jet hose on both edges thereof are collectively pulled back,
By collecting the protection member and the water jet hose, it is possible to secure the drainage function of the drainage member of the ground drainage member for a long time and to reuse the protection member and the water jet hose. Since the water jet hose and the water jet hose can be wound in a coil shape as an integral auxiliary member and handled, the recovery means can be simply configured.

When the auxiliary member supply means comprises a reel having the same support shaft and a take-up drive mechanism, the protection member and the water are provided by the auxiliary member supply means having a simple structure using a reel having a take-up drive mechanism. Both the integral supply operation and the recovery operation of the jet hose are possible.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a ground drainage member of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a side view showing an example of an apparatus for installing the ground drainage member of FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a view taken in the direction of the arrow V in FIG. 3;

FIG. 6 is an enlarged sectional view showing a construction state in which the ground drainage member of FIG. 1 is formed in a pile wall shape.

FIG. 7 is a plan view of a drainage area where the ground drainage member of FIG. 1 is constructed.

FIG. 8 is a view similar to FIG. 1, showing another embodiment of the ground drainage member of the present invention.

9 is a view similar to FIG. 5 of an apparatus for installing the ground drainage member of FIG. 8;

FIG. 10 is a view similar to FIG. 1, showing a modification of the ground drainage member of FIG. 8;

FIG. 11 is a front view showing a main part of an apparatus for constructing the ground drainage member of FIG. 10;

[Explanation of symbols]

 Reference Signs List 1 ground drainage member 2 sheet pile 3 web 4 drainage member 5 protection member (auxiliary member) 9 fixing member 11 ground drainage member installation device 12 press-in chuck 13 mast 14 pile press-in / pull-out machine (pile press-in means) 15 drainage member supply means 16 Protective member supply means (recovery means) 21 Ground drainage member 22 Water jet hose 23 Hose supply means (Recovery means) 24 Ground drainage member 25 Water jet hose (Auxiliary member) 26 Auxiliary member supply means (Recovery means) A Drainage area B Outer area D Sandy belt

Claims (7)

[Claims] 1. A ground drainage member comprising a sheet pile for press-fitting into the ground and a buried drainage member provided in a longitudinal direction along a web of the sheet pile, wherein the drainage member is located outside the drainage member. A ground drainage member provided with a plate-shaped protection member having a width capable of protecting the outer surface of the drainage member. 2. A fixing member, such as a shear pin, which is fixed to the lower end of the sheet pile and which can be broken by a predetermined tensile force acting on the protecting member, and the breaking strength of the fixing member is a plate-like member. The ground drainage member according to claim 1, wherein the range is set so as to exceed a frictional force received from the ground and to be smaller than a tensile strength of the protection member. 3. A press-fitting means for press-fitting a sheet pile into the ground,
A drainage member supply means for supplying a drainage member for embedding along a web corresponding to the press-fitting of the sheet pile; A protection member supply means for supplying a plate-like protection member having a width capable of protecting the outer surface thereof. 4. The apparatus according to claim 3, further comprising a protection member recovery means for pulling back the protection member with a predetermined tensile force sufficient to recover the protection member. 5. The protection member supply means includes a rotatable reel having the protection member wound in a coil shape, and a winding drive mechanism for winding and driving the reel with a predetermined pulling force sufficient to recover the protection member. The construction apparatus for a ground drainage member according to claim 3, comprising: 6. When a sheet pile is press-fitted by using a pile press-fitting means, a drainage member for burying is disposed along the web of the sheet pile in the longitudinal direction thereof, so that the pile sheet and the drainage member are separated from each other. In a ground improvement method in which a ground drainage member is formed in the ground, a protection member for protecting the outside of the drainage member is provided, and the protection member is removed and recovered after press-fitting the ground drainage member. Characteristic ground improvement method. 7. A water jet hose is press-fitted together with the protection member, and at this time, a jet water flow is supplied to the periphery of the drainage member by the water jet hose, and after the press-fitting, the water jet hose is collected together with the protection member. The ground improvement method according to claim 6, wherein