JP6561104B2 - Slime treatment method in cast-in-place pile method - Google Patents

Description

In the cast-in-place pile method as a foundation pile of a building, the slime remaining together with the muddy water is sucked with a submersible sand pump into the underground hole that has been excavated using the muddy water as a stable liquid and discharged out of the underground hole. The present invention relates to a slime processing method in the cast-in-place pile method.

  Conventionally, as a cast-in-place pile method as a foundation pile of a building, an earth drill method, a Benoto method, a reverse circulation method and the like have been implemented. In any method, mud water mainly composed of water-bentonite suspension is used as a stable liquid in the underground hole to carry out excavated sediment, cool excavator, prevent groundwater discharge, prevent collapse of hole wall, etc. The excavation work is underway. Used muddy water deteriorates to increase its specific gravity and contains slime, which is a residue such as fine mud sand generated by excavation. Therefore, after completion of excavation and before placing the ready-mixed concrete in the next process, it is necessary to replace the used mud with new mud and remove the slime.

  When the slime remains, the ultrasonic drilling to confirm the excavation status of the underground hole may not be able to measure the drilling tip or hole wall at the bottom of the hole, and check whether the predetermined drilling has been performed. There is a big problem that it becomes an obstacle to doing. Above all, when the pile is constructed by placing the ready-mixed concrete in the next process with the slime remaining in the hole bottom, there is a slime layer between the pile bottom and the excavated support layer. Because of the role of the material, the placed pile may not be able to fulfill its original performance and support. In the cast-in-place pile method, the removal of slime, especially the removal of slime deposited on the bottom of the hole, is one of the most important issues.

  Therefore, as a more effective slime removal means than before, the submersible sand pump suspended on a suspension branch that can be unwound and taken up is lowered into the underground hole where excavation has been completed using the muddy water as a stable liquid and put into the muddy water. There is known a slime treatment device that sucks slime that floats, settles at the bottom of a hole, or adheres to a hole wall together with muddy water, and discharges the slime to the ground. The submersible sand pump in this slime treatment apparatus is connected to a cab tire that supplies power as a power source to the submersible sand pump, together with a mud hose that pumps the sucked mud water to the ground.

  Recently, various means for improving the above-described slime treatment apparatus have been provided in order to cope with various problems during slime suction. For example, a means for using a suspension rubber for suspending the underwater sand pump as a specific rubber belt so as to receive a reaction force at the start of the underwater sand pump and suppress its rotation (Patent Document 1), In order to remove the slime and build a high-quality cast-in-place pile with excellent load bearing capacity, the muddy water sucked by the suction pump installed at the bottom of the hole is sprayed from the spray nozzle toward the outer periphery of the hole bottom. (Patent Document 2) is also provided to float the slime in the muddy water.

JP 2010-281152 A JP 2000-120067 A

  According to Patent Document 1, it is possible to prevent torsion due to a reaction force caused by a rotational force when the submerged sand pump is activated. According to Patent Document 2, muddy water is sprayed over a wide area, and slime that settles on the bottom of the hole or adheres to the hole wall can be suspended in the muddy water so that it can be sucked together with the muddy water. It is possible to solve the respective problems shown in Documents 1 and 2.

  On the other hand, the usefulness and versatility of cast-in-place piles and cast-in-place pile methods have been increasingly evaluated recently, and the depth of underground holes to be excavated is also about 60 to 70 m from the conventional depth of about 40 m. In some cases, underground holes with a depth exceeding 100 m are also excavated. The trend of deepening the underground borehole is expected to increase in the future. At the same time, the following new issues have arisen with increasing depth.

  The submersible sand pump that sucks mud together with the slime has a suspension rope for suspending the submersible sand pump, a mud hose for lifting mud on the ground, and a cab tire for supplying power to the submersible sand pump. On the ground, the suspension branch is wound around the suspension branch winding drum, the lifting mud hose is wound around the lifting mud winding drum, and the cab tire is wound around the cab tire winding drum. It has been turned. The suspension branch winding drum is rotated by a suspension support hydraulic motor, the lifting mud winding drum is rotated by a lifting mud hydraulic motor, and the cabtire winding drum is rotated by a power feeding hydraulic motor.

  When the submersible sand pump is lowered into the underground hole, the suspended hoist winding drum is moved in the unwinding direction while the mud hoist winding drum and the cabtire winding drum are driven to rotate in the winding direction. The submersible sand pump is lowered to a predetermined position in the underground hole by rotating and driving the suspension branch. That is, the suspension branch winding drum lowers the submersible sand pump by overcoming the rotational force in the winding direction of the mud hoist winding drum and the cabtire winding drum and feeding the suspension branch. Further, the submersible sand pump 100 is brought into a predetermined position in the underground hole by overcoming the rotational force in the winding direction of the hoisting hose winding drum and the cabtire winding drum and braking the suspension branch winding drum. Stopped. Therefore, the mud hose and the cab tire are always tensioned in the winding direction in any of the scenes when the submersible sand pump descends into the underground hole, during braking, and during ascent.

  On the other hand, when raising the submersible sand pump from the underground hole, the submersible sand pump is raised by rotating the suspension branch winding drum in the winding direction and winding the suspension branch. At this time, the lifting mud hose winding drum and the cab tire winding drum are also driven to rotate in the winding direction, so that the lifting mud hose and the cab tire are both wound.

  Therefore, the suspension hydraulic motor as a power source for the suspension branch take-up drum is a suspension support against the take-up force of the lifting hose take-up drum and the cabtire take-up drum when the suspension branch is extended. The pressure is set so that the rope can be extended to lower the submersible sand pump.

  The lifting mud hydraulic motor and the feeding hydraulic motor are set so as to be driven to rotate in the winding direction at a fixed pressure both when the lifting mud hose and the cabtyre are fed and wound. If the underground hole has a depth of up to about 40 m, it is possible to cope with various feeding operations and winding operations associated with each operation by the submersible sand pump without causing a particularly large problem. However, as the excavation depth of the underground hole increases from 60 m to 70 m, and in some cases deeper than 100 m, the length of the mud hose and cab tire fed out into the underground hole also increases, and the winding load also increases. . In particular, when the mud hose is filled with muddy water that is pumped to the ground and is spaced a predetermined distance from the muddy water surface of the underground hole to the slime treatment device, the slime treatment device from the muddy water surface of the underground hole The length up to will be taken into account. In addition, in the muddy water in the underground hole, the take-up weight of the muddy hose is reduced by its own buoyancy, but from the muddy water surface of the underground hole to the slime treatment device, all the weight of the muddy hose is Since it is added directly, a larger winding force is required. The same applies to the cabtire winding drum for winding the cabtire.

  Therefore, the mud hydraulic motor that rotates the mud hose take-up drum and the power feeding hydraulic motor that drives the cabtyre take-up drum rotate deeper in the underground hole and the installation place of the slime treatment equipment on the ground. In response to this, since it is necessary to wind up the mud hose and the cab tire, it is necessary to set the pressure so that a larger winding force can be obtained. Further, it is necessary to set the pressure of the suspension hydraulic motor so that the suspension support can be extended against the pressure setting of the lifting mud hydraulic motor and the power feeding hydraulic motor. Therefore, in the present situation, the pressures of the lifting mud hydraulic motor and the feeding hydraulic motor are set according to the required winding force. In other words, the pressure setting of the pumping hydraulic motor and power feeding hydraulic motor is based on the maximum output corresponding to the required winding force based on the depth of the underground hole to be excavated and the installation location of the slime treatment equipment. However, no consideration is given to the operability and accuracy during feeding.

  However, when setting the pressure of the hydraulic motor for lifting mud, focusing on the deepening of the underground hole and the winding operation to cope with the installation location of the slime treatment equipment on the ground, the submersible sand pump is placed in the underground hole. It becomes difficult to carry out the feeding work for lowering efficiently and accurately. This is because the position of the connection of the mud hose to the submersible sand pump is on the outer periphery of the submersible sand pump, and at the start of feeding, the mud hose is suspended in a state of drawing a slight arc from the vertical direction by its repulsive force. Therefore, when the mud hose is extended, a force to tilt the submersible sand pump from the vertical direction to the lateral direction is generated, and the submersible sand pump does not contact the hole wall of the underground hole. This is because it becomes difficult to hang down in the center of the hole, so that slime is spotted, and the slime removal accuracy and efficiency are directly adversely affected. Details will be described later.

Therefore, the present invention solves the above-mentioned problem, even when the excavation depth of the underground hole is more than a certain level, or when the slime treatment device is installed at a certain distance from the muddy water surface of the underground hole, By allowing the sand pump to descend into the underground hole with precise control, and having sufficient hoisting force, that is, during unwinding where operability is required, large hoisting is also possible. by supporting both during the winding force is required, and its object is to provide a slime treatment method that prevails place pile method to efficiently remove slime.

In order to achieve the object, the present invention provides, according to claim 1, an underwater sand pump suspended on a suspension branch wound around a suspension branch winding drum so as to be able to be unwound and wound, and an uplift hose winding drum. A mud hose that is wound to be able to be unwound and wound up and connected to an underwater sand pump, and in order to supply power to the underwater sand pump, it is wound on a cabtyre wind take-up drum and wound into an underwater sand pump. water sand pump slime processing apparatus in place pile method provided with the linked cabtire, mud is lowered into the ground hole to complete the excavation as a stable liquid by sucking slime with muddy water, through the fried mud hose Te in slime treatment method in place pile method for discharging by Agedoro on the earth, leaving the winding direction or repeatedly by suspending支索winding journaling hydraulic motor suspended drum It is possible to rotate the hose winding drum only in the winding direction by the hydraulic motor for lifting mud, and when the submersible sand pump descends, the lifting hose winding drum is rotated in the winding direction. In the state where the mud hoses are in tension, the suspension hoist winding drum is driven to rotate in the unwinding direction to unwind the suspension hoist and lower the submersible sand pump into the underground hole. When the submersible sand pump is raised, the lifting hose take-up drum and the suspension branch take-up drum are driven to rotate in the take-up direction, and the suspension branch becomes the suspension take-up take-up drum. winding taken, together with increasing the water sand pump, wound up Agedoro hose Agedoro hose winding drum, the pressure of the hydraulic motor Agedoro, ascent and during descent of the water sand pump Dude provide a basic slime treatment method in place pile method, wherein the winding the Agedoro hose by selecting different pressures.

The 請 Motomeko 2, the pressure of the hydraulic motor Agedoro, during feeding of the lift mud hose due to lowering of water sand pump, to easily low pressure keeping the posture of the underwater sand pump in the vertical direction, with increasing water sand pump Provided is a method capable of setting a high pressure corresponding to the winding weight of the lifting mud hose when winding the lifting mud hose .

The 請 Motomeko 3, the pressure during the low pressure of the hydraulic motor Agedoro and 40 Kg / Cm ² or less, to provide a method in which the pressure during the high pressure and ^{50Kg / Cm 2 ~ 80 Kg /} Cm 2.

The 請 Motomeko 4, and only the rotational driving permit cabtire winding drum in the winding direction by feeding hydraulic motors, at the time of descent of the water sand pump, cabtire are rotationally driven in the winding direction cabtire winding drum When the underwater sand pump is raised, the cab tire take-up drum is rotated in the take-up direction to wind the cab tire around the cab tire take-up drum. , the pressure of the feed hydraulic motor, which provides a method for controlling at different pressures at the time of Noboru Ue the time of descent of the water sand pump.

According to claim 5 , the pressure of the hydraulic motor for feeding is set to a low pressure at which the posture of the submersible sand pump is kept low in the vertical direction when the cab tire is extended when the submersible sand pump is lowered. Provided is a method capable of setting a high pressure corresponding to the winding weight of the cabtyre during winding .

The 請 Motomeko 6, the pressure of the low-pressure feeding hydraulic motor and 30 Kg / Cm ² or less, to provide a method in which the pressure during the high pressure and ^{50Kg / Cm 2 ~55Kg / Cm 2} .

The 請 Motomeko 7, a method of installing a predetermined distance to separate the slime processor from muddy water surface of the ground hole by claim 8, predetermined distance from muddy water surface of the ground hole in the height direction slime processor Provide a way to install .

The 請 Motomeko 9, provides a method of installing a slime processing apparatus on gantry having a predetermined height from the mud surface underground hole.

  The first of the features of the present invention described above is that the pressure of the hydraulic motor for lifting mud as the driving source of the lifting mud hose winding drum is different from that at the time of unwinding and winding of the suspension branch. When extending the branch and lowering the submersible sand pump into the underground hole, the pressure is controlled at a low pressure, and when winding the suspended support and raising the submersible sand pump, the control is performed at a high pressure. That is, in order to suck the slime together with the muddy water and raise it to the ground, a muddy hydraulic motor for rotating the muddy hose winding drum wound with a muddy hose connected to an underwater sand pump is When lowering the sand pump, in order to accurately control its posture, the hoist drum is rotated at a low pressure in the winding direction, while when the submersible sand pump is raised, In order to obtain the large winding force required to wind up the mud hose drawn out according to the drilling depth of the hole, the winding mud hose take-up drum is pressurized at the time of winding the suspended support of the submersible sand pump. And rotationally driving in the winding direction. Therefore, the mud hose can be smoothly controlled according to the working state.

  The second feature of the present invention is that the pressure of the power feeding hydraulic motor as the drive source of the cabtyre wind-up drum is set so that the pressure differs between when the suspension branch is extended and when it is wound, specifically, when the suspension branch is extended. When the submersible sand pump is lowered into the underground hole, it is controlled at a low pressure. On the other hand, when the submerged sand pump is lifted by winding the suspension branch, it is controlled at a high pressure. That is, when the submersible sand pump is lowered, the posture of the hydraulic motor for power feeding for rotationally driving the cabtyre take-up drum wound with the cabtyre connected to the submersible sand pump to supply power When the cabtyre wind drum is rotated in the winding direction at a low pressure and the submersible sand pump is raised, the cab fed out according to the excavation depth of the underground hole is controlled. In order to obtain a large winding force necessary for winding the tire, the cabtire winding drum is driven to rotate in the winding direction at a high pressure when winding the suspension branch of the submersible sand pump. Therefore, the cab tire can be smoothly controlled according to the working state.

  A third feature of the present invention is that the slime treatment device is located at a certain distance from the muddy water surface of the underground hole, such as a stepped terrain or an underground hole for excavating the underground hole in the underground of an existing structure. It is possible to install on a gantry having a certain height from the muddy water surface. When the slime treatment device is installed at a location spaced apart from the muddy water surface of the underground hole, the height from the muddy water surface of the underground hole to the installation location of the slime treatment device is taken into account. Therefore, since the weight of the lifting mud hose for the length from the muddy water surface of the underground hole to the installation location of the slime treatment device is directly taken into account, the lifting mud hoist drum is accompanied by the installation location of the slime treatment device. Winding force is required. At that time, the weight of the muddy water in the lifting mud hose is supported by the impeller installed in the submersible sand pump in order to suck the mud water, and therefore does not affect the winding force of the lifting mud hose winding drum. Similarly, in the cabtyre windup drum that winds up the cabtyre, the weight of the cabtire from the muddy water surface of the underground hole to the place where the slime treatment device is installed is taken into account. In addition, a winding force associated with the installation location of the slime treatment device is required. According to the present invention, even when the slime treatment device is installed at a position spaced apart from the muddy water surface of the underground hole, the ground control can be performed without sacrificing accurate posture control when the submersible sand pump is lowered. A winding force that can wind up the muddy hoses and cabtyres for the length from the muddy water surface of the medium hole to the installation site of the slime treatment device is applied to the hoisting drums and cabtyre winder drums. be able to.

  Specifically, by enabling the low-pressure drive of the hoisting hose take-up drum and the cabtyre take-up drum, when the hoisting hose take-down drum is lowered into the underground hole where precise control and positioning are required. The submersible sand pump can be controlled so as to keep the posture of the submersible sand pump in the vertical direction. Also, by enabling high-pressure driving, the depth of excavation of the underground hole becomes deep and the feed length of the lifting mud hose and cabtyre increases, and the slime treatment device is connected to the underground hole mud. Even if it is installed at a certain distance from the surface, it can be reliably rolled up to the ground according to the depth of the underground hole and the distance from the muddy water surface of the underground hole to the slime treatment device, making slime removal work efficient Can be done. In addition, since it is not necessary to acquire special skills for the switching operation between the low pressure and the high pressure, the operation is easy.

Explanatory drawing which shows the summary of this invention. The whole block diagram of a slime processing device. Explanatory drawing of the principal part of a pumping hose winding drum and a suspension branch winding drum. Explanatory drawing of the principal part of a pumping hose winding drum. Explanatory drawing of the principal part of a suspension branch winding drum. Explanatory drawing of the principal part of a suspension branch winding drum. Explanatory drawing of the principal part of a cabtire winding drum. Process explanatory drawing of the processing method of a slime. Process explanatory drawing of the processing method of a slime. Process explanatory drawing of the processing method of a slime. Process explanatory drawing of the processing method of a slime. Process explanatory drawing of the processing method of a slime. Explanatory drawing which shows the processing condition of slime. Explanatory drawing which shows the processing condition of slime. Explanatory drawing which shows the processing condition of slime. Explanatory drawing which shows the processing condition of slime. Explanatory drawing which shows the processing condition of slime.

An embodiment of the slime treatment method in place pile method according to the present invention based on the following drawings. FIG. 1 is an explanatory view showing the gist of the present invention, and FIG. 2 is an overall configuration diagram of a slime processing apparatus 1 used in the slime processing method according to the present invention . First, the basic configuration of the slime treatment apparatus 1 with reference to FIG.

  In the figure, a base 3 having a predetermined width dimension and having a rectangular shape in plan view is mounted on a swivel base 2 so as to be turnable. A pair of support brackets 4 having a predetermined height dimension and having a rectangular shape in a side view are provided upright at both ends in the width direction at the substantially central portion of the base 3. A base portion 5b of a boom 5 divided into two parts is pivotally supported by support portions 4a projecting from the side surfaces of the upper end portions of the pair of support brackets 4, respectively. Reference numeral 3 a denotes an outrigger, which is attached to a corner of the base 3 in order to maintain the stability of the base 3.

  A hoisting cylinder 6 is disposed between the middle portion of the boom 5 and the support portion 4 b provided on the side surface of the lower end portion of the support bracket 4. A main shaft 8 is rotatably mounted on bearing portions 7 disposed at both ends of the upper surface of the support bracket 4. As shown in the main part explanatory view of the lifting mud hoisting drum 31 and the suspended branch winding drum 41 in FIG. 3 and the main part explanatory view of the lifting mud hoisting drum 31 in FIG. A central shaft 37 of the hose winding drum 31 is rotatably supported. The central shaft 37 is hollow, and a mud hose connection port 37a for connecting the base end portion of the mud hose 30 is installed. The depth D of the underground hole 22 to be excavated is connected to the mud hose connection port 37a. (Refer to FIG. 10) The base end portion of the lifting mud hose 30 having a predetermined length according to the connection is connected to wind the winding mud hose winding drum 31 so that it can be unwound and rewound, and the tip is submerged in a sand pump. Connect to 100. A chain 36 is stretched between a sprocket 34 connected to one side of the main shaft 8 and a sprocket 35 connected to the output shaft 32 a of the hydraulic motor 32 for lifting mud.

  The other side of the main shaft 8 is hollow, communicates with the central shaft 37 of the hoisting drum 31 and is connected to the discharge pipe 23 at the open end, and to the discharge pipe 23 is connected to the discharge pipe valve 24. doing. As will be described later, the pipe 25 is connected to the discharge pipe valve 24, and the mud 20 containing the slime 21 that has been pumped up from the underground hole 22 by the submersible sand pump 100 is stored in the mud tank 26 (FIG. 8).

  As shown in the explanatory view of the main part of the suspended branch winding drum 41 in FIGS. 3, 5, and 6, a pair of left and right suspended branch winding drums 41 are wound on both sides of the lifting mud winding drum 31. It is rotatably mounted on a main shaft 8 coaxial with the take-up drum 31. A base end portion of a pair of left and right suspension branches 40 made of a rubber belt having a predetermined length corresponding to the depth D of the underground hole to be excavated is connected to the suspension branch winding drum 41, and the suspension branch winding The underwater sand pump 100 is suspended by being connected to the underwater sand pump 100 while being wound around the take-up drum 41 so as to be unwound and rewindable. Between a pair of left and right sprockets 44 connected to the main shaft 8 and a pair of left and right sprockets 45 connected to both ends of a rotating shaft 46a of a reduction gear 46 connected to a drive shaft of a suspension hydraulic motor 42 installed on the base 3. A pair of left and right chains 47 are stretched over the two. Therefore, by rotating and driving the suspension branch winding drum 41 by the suspension branch hydraulic motor 42, the suspension branch 40 wound around the suspension branch winding drum 41 can be freely unwound, wound, or arbitrarily It is possible to stop at the position.

  The two suspension branches 40 wound around the pair of left and right suspension branch winding drums 41 are led out to the suspension branch sheave 43 disposed at the distal end portion 5 a of the boom 5. The underwater sand pump 100 is suspended from the tip of the suspension connected to the arm-shaped traverser 10. This traverser 10 is for maintaining the submersible sand pump 100 suspended in the underground hole 22 horizontally. In addition, in this embodiment, in order to suppress the rotation resulting from the reaction force at the time of operation of the submersible sand pump 100, the rubber belt shown in Patent Document 1 was used as the suspension support line 40 that supports the submersible sand pump 100. In addition, it is also possible to employ | adopt the chain and other appropriate suspension support lines 40, without restricting to a rubber belt.

  The muddy hose 30 wound around the muddy hose take-up drum 31 is led out to a muddy hose sheave 33 disposed in the vicinity of the sheave 43 for the suspended branch, and downward from the muddy hose sheave 33. The tip is connected to the submersible sand pump 100 by being suspended.

  The above-described lifting mud take-up drum 31 is configured to rotate independently by a lifting mud hydraulic motor 32, and the suspended branch winding drum 41 is driven to rotate independently by a suspension hydraulic motor 42. The hoisting drum 31 is set so as to be rotatable only in the winding direction by the hoisting hydraulic motor 32. When the submersible sand pump 100 is lowered, the hoisting drum 31 is wound in the winding direction. In the state in which the lifting mud hose 30 is tensioned by rotating the suspension branch 40, the suspension branch take-up drum 41 is driven to rotate in the unwinding direction by the suspension support hydraulic motor 42, whereby the suspension branch 40 is unwound and the sand The pump 100 is lowered into the underground hole 22 and the mud hose 30 is fed out of the mud hose winding drum 31 against the winding force. In other words, when the submersible sand pump 100 is lowered, there is a relationship of [winding force of the hoisting hose winding drum 31 <feeding force of the hoisting winding coil 41], so that the mud hose 30 is in a tensioned state. The submersible sand pump 100 is lowered from the lifting hose take-up drum 31 by the action of the submersible sand pump 100 being lowered by the extension of the suspension branch 40.

  Further, a pair of support brackets 11 are erected in the rear R direction from the pair of support brackets 4 erected on the base 3, and the rotating shaft 13 is attached to the bearing portion 12 disposed on the upper surface of the support bracket 11. A cabtire winding drum 51 is rotatably supported on the rotating shaft 13. The cabtire winding drum 51 is connected to a base end portion of a cabtire 50 having a predetermined length corresponding to the depth D of the underground hole to be excavated so that the cabtire winding drum 51 can be fed and wound up freely. It is wound around. As shown in the explanatory diagram of the main part of the cabtire winding drum 51 in FIG. 7, between the sprocket 54 connected to the rotating shaft 13 and the sprocket 55 connected to the drive shaft of the power feeding hydraulic motor 52 installed on the support bracket 11. A chain 56 is stretched over.

  The power supply cab tire 50 wound around the cab tire take-up drum 51 is led out to a cab tire sheave 53 disposed at the tip portion 5 a of the boom 5, and is suspended downward from the cab tire sheave 53. The tip portion is connected to a motor (not shown) provided in the submersible sand pump 100 so as to be able to supply power. Reference numeral 57 denotes a power supply slip link provided on the rotary shaft 13.

  The boom 5 is divided into two parts, and a guide 14 having a substantially triangular frame shape in a side view protrudes from the upper surface of each boom tip 5 a and is connected by a connecting rod 15. The cab tire 50 is supported by the connecting rod 15 and led out to the cabtyre sheave 53, and the suspension branch 40 passes through a guide hole formed in the guide 14 and is led out to the suspension branch sheave 43.

  The cabtire winding drum 51 is set to be rotatable only in the winding direction by the power supply hydraulic motor 52. When the submersible sand pump 100 is lowered, the cabtire winding drum 51 is rotated in the winding direction. In this state, the cab tire 50 is fed out from the cab tire winding drum 51 and the cab tire 50 is fed out from the cab tire winding drum 51 against the winding force. That is, when the submersible sand pump 100 is lowered, there is a relationship of [winding force of the cab tire winding drum 51 <feeding force of the suspension branch winding drum 41], and therefore the cab tire 50 is suspended in a tensioned state. The submersible sand pump 100 is lowered from the cabtyre wind-up drum 51 by the action of the submerged sand pump 100 being lowered.

  The slime treatment apparatus 1 inserts the submersible sand pump 100 suspended from a suspension branch 40 that can be unwound and wound into the underground hole 22 that has been excavated using the muddy water 20 as a stable liquid. The mud water 20 is suspended in the mud water 20 or sedimented on the hole bottom 22a of the underground hole 22 or adhering to the hole wall 22b is sucked by the underwater sand pump 100 and pumped to the ground. 22 is discharged and removed. The outline will be described with reference to FIG.

  As shown in FIG. 8, the underground hole 22 that has completed excavation is filled with mud water 20 as a stable liquid that is deteriorated by excavation and that includes slime 21 that is a residue such as fine mud sand generated by excavation. Has been. The slime processing apparatus 1 is installed at a predetermined position near the underground hole 22, the swivel base 2 is rotated to a predetermined position, the position of the base 3 is determined, and the posture is stabilized by the outrigger 3a. Next, the hoisting cylinder 6 is driven to perform the hoisting operation of the boom 5, and after determining the position of the hoisting sheave 43 disposed at the distal end portion 5 a of the boom 5, a pair of left and right hoisting windings are wound. By pulling out the suspension support 40 composed of two rubber belts from the take-up drum 41, the submersible sand pump 100 is lowered to a region where the specific gravity of the muddy water in the underground hole 22 is high, that is, a degraded region.

  At this time, the lifting mud hoisting drum 31 disposed coaxially with the suspended branch winding drum 41 is driven to rotate in the winding direction by the lifting mud hydraulic motor 32. Similarly, the cabtire winding drum 51 is also driven. The power feeding hydraulic motor 52 is driven to rotate in the winding direction. Therefore, the suspension branch winding drum 41 is rotationally driven in the unwinding direction by the suspension support hydraulic motor 42, the suspension branch 40 is unrolled and the underwater sand pump 100 descends into the underground hole 22, thereby The mud hose 30 and the cab tire 50 connected to the pump 100 are also fed out in a tensioned state in the winding direction.

  Next, by supplying power to the cabtyre 50, a motor (not shown) provided in the submersible sand pump 100 is driven to start the muddy water 20 uplifting, and the suspension branch 40 is connected to the bottom of the underground hole 22. By gradually descending to 22a, the submersible sand pump 100 floats in the muddy water 20 or sinks the slime 21 settled in the hole bottom 22a together with the muddy water 20, and passes through the lifting mud hose 30 to the ground. Muddy. Furthermore, the slime 21 floating in the muddy water 20 in the underground hole 22 is sucked together with the muddy water 20 by sequentially pulling up the suspension branch 40 composed of two rubber belts. The mud water 20 containing the slime 21 sucked into the submersible sand pump 100 is pumped to the outside of the underground hole 22 via the pumping hose 30 and pumped to the pumping mud hose connection port 37a of the central shaft 37 of the slime treatment apparatus 1. The base end portion of the mud hose 30 is connected, and the mud hose 30 is stored in the waste mud tank 26 via the pipe 25 connected to the discharge pipe valve 24 mounted on the discharge pipe 23 (see FIG. 3) connected to the central shaft 37. Dispose. Therefore, by controlling the opening / closing operation and the degree of opening / closing of the discharge pipe valve 24, it is possible to set / manage the presence / absence of the muddy water 20 and the amount of muddy water. At the same time, new muddy water 61 from the muddy water tank 60 is replenished to the underground hole 22 through the pipe 63 by the submersible sand pump 62 for supplying muddy water, and the deteriorated muddy water 20 mixed with slime and the new muddy water 61 are replaced.

  As shown in FIG. 9, the mud hose 30 is often connected to the outer peripheral portion of the impeller 9 in order to lift the mud 20 sucked by the impeller 9 installed in the submersible sand pump 100 to the ground. In addition, the lifting mud hose 30 is suspended in a state where an arc is slightly drawn from the vertical direction by the repulsive force at the start of feeding of the lifting mud hose 30 for descending into the underground hole 22. Therefore, a force to tilt the submersible sand pump 100 from the vertical direction to the lateral direction is generated, so that the submersible sand pump 100 does not contact the hole wall 22b of the underground hole 22 and the center in the underground hole 22 The slime 21 is difficult to sag, causing spots in the suction of the slime 21, and directly adversely affecting the removal accuracy and efficiency of the slime 21. This tendency is particularly strong when the underground hole 22 is deeply excavated or when the underground hole 22 has a small diameter.

  It is required to accurately control the posture of the submersible sand pump 100 when the pumping hose 30 is started to feed into the underground hole 22. Therefore, conventionally, the pressure of the lifting mud hydraulic motor 32 that rotationally drives the lifting hose take-up drum 31 is set to a pressure suitable for the feeding operation of the lifting mud hose 30, that is, as shown in FIG. Work was done with the pressure set to an easy pressure to control in the vertical direction. The pressure of the power feeding hydraulic motor 52 that rotationally drives the cabtire winding drum 51 is also set to a pressure that makes it easy to control the attitude of the submersible sand pump 100 in the vertical direction.

  As shown in FIG. 10, the submersible sand pump 100 is suspended in the vertical direction at the start of feeding of the mud hose 30 for descending into the underground hole 22 by the pressure setting of the above-described hydraulic mud motor 32. And as shown in FIG. 11, it is hung down to the center in the underground hole 22 without contacting the hole wall 22b in the middle of descending into the underground hole 22, and as shown in FIG. The bottom 22a is set at a predetermined position.

  In the case where the submersible sand pump 100 is lifted while the mud water 20 in which the slime 21 is dispersed is being lifted, that is, in the winding work of the mud hose 30, the pressure of the hydraulic motor 32 for mud lifting is conventionally paid out. The work is set at a fixed pressure that is the same as the working pressure. If the underground hole 22 has a depth D of up to about 40 m, even if the pressure of the mud hydraulic motor 32 is set with priority given to controlling the attitude of the submersible sand pump 100 in the vertical direction as in the prior art. It was possible to cope with various feeding operations and winding operations associated with each operation by the submersible sand pump 100 without causing a particularly big problem.

  However, the usefulness and versatility of cast-in-place piles and cast-in-place pile methods have been increasingly evaluated recently, and the depth D of the underground hole 22 to be excavated is 60 m from the conventional depth D of about 40 m. An underground hole 22 having a depth D of about 70 m and a depth D exceeding 100 m is excavated in some cases. The trend of deepening the underground hole 22 is expected to increase further in the future. In this way, as the depth D of the underground hole 22 to be excavated becomes deeper than 60 m, naturally, the length of the mud hose 30 fed into the underground hole 22 becomes longer. The weight of the mud hose 30 on the ground is about 4.5 kg / m, the weight in water is about 1.0 kg / m, and the longer the feed length of the mud hose 30 filled with the mud water 20 is, the longer it is. In addition, outside the underground hole 22, the longer the length fed out from the slime treatment device 1, the more the weight increases in proportion to the feeding length, and the weight of the lifting mud hose 30 corresponding to the length fed out directly increases. In consideration of this, the hoisting drum 31 for taking up the mud hose requires a larger winding force in accordance with the installation location of the slime treatment device 1.

  The submersible sand pump 100 reduces the winding weight due to its own buoyancy in the muddy water 20 in the underground hole 22, but if the winding length increases, There is no doubt that you will need a take-off power.

  FIG. 13 is a construction site where the slime treatment apparatus 1 is installed on a gantry P having a certain height T, spaced apart from the ground GL at the opening of the underground hole 22 by a predetermined distance in the height direction. Also in this case, since the weight of the lifting mud hose 30 corresponding to the length from the ground GL to the gantry P is directly taken into account, a larger winding force is required. The height T from the ground GL to the gantry P varies from a few meters to about 15 meters depending on the construction environment. In the future, installation at a higher position is also conceivable. The need for a large winding force at the time of winding is also the same for the cabtire winding drum 51 that winds the cabtire 50. Note that the gantry P is a natural object as long as it has a certain height adjacent to the underground hole 22 and the space where the slime processing device 1 such as a structure or an existing building can be installed, using the difference in height of the terrain. Regardless of artifacts.

  In addition, in recent years, cast-in-place piles are often constructed at various construction sites such as stepped land, narrow land, adjacent land of existing structures and buildings, and underground. For example, as shown in FIGS. 14 and 15, among the two buildings 71 and 72 built on the stepped land 70, the building 72 on the upper stepped land 70 b is dismantled and a foundation pile for a new building This is a construction site where the underground hole 22 is excavated. In the stepped land 70, when the underground hole 22 is excavated from the upper stepped land 70b and the muddy water 20 is filled up to the opening in the underground hole 22, the muddy water 20 leaks from the inclined land 70c depending on the ground, and the lower stepped land There is a risk of damage to the building 71a of 70a and the environment.

  Therefore, when excavating the underground hole 22 using the muddy water 20 in the construction place such as the upper step 70b of the stepped land 70, the casing tube 75 having a predetermined length is inserted through the opening of the underground hole 22. Then, after preventing the collapse of the hole wall 22b, the muddy water 20 is supplied so that the muddy water surface 22c stops near the level of the ground GL1 of the lower step 70a. Thereby, it is possible to prevent water leakage and other damage from the inclined land 70c caused by the muddy water 20.

  On the other hand, the muddy water surface 22c is separated from the ground GL2 of the upper stage 70b where the slime treatment device 1 is installed by a certain distance T in the height direction. Because it is added, a larger winding force is required.

  In addition, as shown in FIGS. 16 and 17, in the construction site where the existing building 80 having an underground structure is dismantled and the underground hole 22 is excavated in the underground 81 as a foundation pile for a new building, After dismantling the underground structure, a predetermined gantry 82 having a height up to the ground level GL3 is constructed, and a casing tube 83 is rotationally press-fitted from the ground level GL4 by a known casing driver 85 from the upper surface 82a of the gantry 82. Then, the underground hole 22 is excavated using the muddy water 20 from the underground ground GL4.

  Therefore, when excavating the underground hole 22 from the underground ground GL4, the mud surface 22c is separated by a certain distance T in the height direction from the ground surface GL3 or the slime treatment device 1 installed on the upper surface 82a of the gantry 82. Thus, since the weight of the mud hose 30 is directly taken into account during this fixed distance T, a larger winding force is required.

  As described above, the depth D of the underground hole 22 to be excavated is deep, the underground hole 22 is excavated underground, or the slime treatment device 1 is placed at a certain distance T from the opening of the underground hole or the muddy water surface. It is suitable for posture control of the submersible sand pump 100 at the time of feeding because the installation place of the slime treatment device 1 is separated from the muddy water surface 22c of the underground hole 22 by a certain distance. In the lifting pressure hydraulic motor 32 at the set pressure, there has been a case where the lifting mud hose 30 cannot be wound. If the lifting hose 30 cannot be wound up, the lifting work cannot be performed. Therefore, the set pressure of the lifting mud hydraulic motor 32 is set based on the pressure required for winding. . Similarly, the power supply hydraulic motor 52 is set based on the pressure required for winding. In other words, the pressure setting of the mud hydraulic motor 32 and the power feeding hydraulic motor 52 is performed based on the output corresponding to the required winding force, and the operability and accuracy during feeding are not taken into consideration. .

  However, in the pressure setting of the lifting mud hydraulic motor 32 focusing on the winding operation of the lifting mud hose 30, an output is output as the pressure during the feeding operation for lowering the submersible sand pump 100 into the underground hole 22. It is too large and it is difficult to precisely control the posture of the submersible sand pump 100 and suspend the submersible sand pump 100 to the center in the underground hole 22 without contacting the hole wall 22b of the underground hole 22. As a result, spots are generated in the suction of the slime 21, and a direct adverse effect on the removal accuracy and efficiency of the slime 21 occurs.

  Therefore, the present invention uses the pressure of the lifting mud hydraulic motor 32, which is the power source of the lifting mud hoist drum 31 that is always driven to rotate in the winding direction, at the time of feeding the lifting mud hose 30, and the submersible sand pump. It was made possible to control at different pressures at the time of starting 100 and winding the mud hose 30. Specifically, the pressure of the mud lifting hydraulic motor 32 can be controlled in two stages, that is, a low pressure during feeding and a high pressure during startup and winding. The characteristics will be described based on the explanatory view showing the gist of the present invention shown in FIG.

  As shown in FIG. 1, the slime treatment device 1 has a suspension branch winding drum 41 that is wound so that the suspension branch 40 can be unwound and wound, and a lifting mud hose 30 that can be unwound and wound. The hoisting drum 31 and the cabtire winding drum 51 wound so that the cabtyre 50 can be unwound and wound can be equipped. While supporting, the mud hose 30 and the cab tire 50 are connected to the underwater sand pump 100. The suspension branch winding drum 41 is rotationally driven in both the feeding direction and the winding direction by the hydraulic pressure of the suspension support hydraulic motor 42, so that the suspension branch 40 can be fed and wound by the hydraulic pressure. The lifting hose winding drum 31 is driven to rotate only in the winding direction by the hydraulic pressure of the lifting mud hydraulic motor 32 and the cabtire winding drum 51 is driven by the hydraulic pressure of the power feeding hydraulic motor 52, respectively. The mud hose 30 and the cabtyre 50 can be wound up by hydraulic pressure, and the submersible sand pump 100 can be lowered against the rotation in the winding direction by lowering the submersible sand pump 100 by feeding the suspension branch 40.

In the present invention, the depth D of the underground hole 22 to be excavated as described above, the underground hole 22 is excavated underground, or the slime treatment apparatus 1 is connected to the opening of the underground hole 22 or the muddy water surface. By installing the slime treatment device 1 at a certain distance T from the muddy water surface 22c of the underground hole 22 by a certain distance, When the pumping hose 30 is fed out when the sand pump 100 descends, the pumping hose 30 is at a low pressure L, and when the submersible sand pump 100 is started (starting and operating) in the underground hole 22 and at the winding time W is a high pressure H 2. Control in stages. Accordingly, the lifting mud hydraulic motor 32 is always controlled to a high pressure when the submersible sand pump 100 sucks the muddy water 20 and when the submersible sand pump 100 is wound up. Specifically, the pressure during the low pressure L and 40 Kg / Cm ² or less, the pressure during the high pressure H and ^{50Kg / Cm 2 ~80Kg / Cm 2} . Further, when the excavation depth of the underground hole 22 is shallower than 50 m, the pressure at the time of high pressure H of the hydraulic motor 32 for lifting mud is 50 kg / Cm ² and the excavation depth of the underground hole 22 is deeper than 50 m The pressure at the time of high pressure H of the lifting mud hydraulic motor 32 is 80 kg / cm ² .

Similarly, the pressure of the hydraulic motor 52 for power feeding is changed at the time F of the cabtyre 50 when the submersible sand pump 100 is lowered into the underground hole 22 and when the submersible sand pump 100 is activated in the underground hole 22 ( The pressure is controlled at different pressures at the time of start-up and operation) and at the time of winding W, and the low-speed L1 is controlled at the time of feeding F, and the high-pressure H1 is controlled at the time of starting and winding. Therefore, the power feeding hydraulic motor 52 is always controlled to a high pressure when the muddy water 20 is sucked by the submersible sand pump 100 and when the submersible sand pump 100 is wound up. Specifically, the pressure o'clock low L1 is 30 Kg / Cm ² or less, the pressure at the high pressure H1 and ^{50Kg / Cm 2 ~55Kg / Cm 2} .

  When the mud hose 30 or the cabtyre 50 is fed F, the submersible sand pump 100 is lowered into the underground hole 22 by outputting the mud hydraulic motor 32 and the power feeding hydraulic motor 52 at low pressures L and L1. In this case, the positioning can be made accurately and the operation is easy. Further, even when the submersible sand pump 100 is lowered into the underground hole 22, the posture can be easily controlled, and the mud hose 30 and the submersible sand pump 100 can prevent the hole wall 22 b from being damaged. Can do. Conventionally, the pumping hydraulic motor 32 and the power feeding hydraulic motor 52 have used a single hydraulic pressure and circuit. However, when the underground hole 22 is at a high depth, work is impossible. Although the work itself has been disabled, on the other hand, it will operate at a high pressure when the load is low, eliminating the problem that the operability when descending into the underground hole 22 has deteriorated. be able to.

  According to the present invention described above, the pressure of the lifting mud hydraulic motor as the driving source of the lifting mud hose winding drum is set to different pressures when the suspension branch is unwound and when it is wound. When the submersible sand pump is lowered into the underground hole, it is controlled at a low pressure. On the other hand, when the submerged sand pump is wound up and the submersible sand pump is raised, it is controlled at a high pressure. That is, in order to suck the slime together with the muddy water and raise it to the ground, a muddy hydraulic motor for rotating the muddy hose winding drum wound with a muddy hose connected to an underwater sand pump is When lowering the sand pump, in order to accurately control its posture, the hoist drum is rotated at a low pressure in the winding direction, while when the submersible sand pump is raised, In order to obtain the large winding force required to wind up the mud hose drawn out according to the drilling depth of the hole, the winding mud hose take-up drum is pressurized at the time of winding the suspended support of the submersible sand pump. And rotationally driving in the winding direction. Therefore, the mud hose can be smoothly controlled according to the working state.

  Also, the pressure of the hydraulic motor for power feeding as the drive source of the cabtyre winder drum is different from the pressure at the time of unwinding and winding of the suspension branch. When it is lowered, it is controlled at a low pressure, and when it is wound up on the one hand and the underwater sand pump is raised, it is controlled at a high pressure. That is, when the submersible sand pump is lowered, the posture of the hydraulic motor for power feeding for rotationally driving the cabtyre take-up drum wound with the cabtyre connected to the submersible sand pump to supply power In order to accurately control the cabtyre wind drum, the cabtyre wind drum is driven to rotate in the winding direction at a low pressure, and when the submersible sand pump is raised, the cab is fed in accordance with the excavation depth of the underground hole. In order to obtain a large winding force necessary for winding the tire, the cabtire winding drum is driven to rotate in the winding direction at a high pressure when winding the suspension branch of the submersible sand pump. Therefore, the cab tire can be smoothly controlled according to the working state.

  In addition, place the slime treatment device at a certain distance from the muddy water surface of the underground hole, such as a stepped terrain, or a certain height from the muddy water surface of the underground hole to excavate the underground hole under the existing structure. It is possible to install it on the gantry that has it. When the slime treatment device is installed at a location spaced apart from the muddy water surface of the underground hole, the height from the muddy water surface of the underground hole to the installation location of the slime treatment device is taken into account. Therefore, since the weight of the lifting mud hose for the length from the mud surface of the underground hole to the installation location is directly taken into account, the winding hose take-up drum has a winding force associated with the installation location of the slime treatment device. Necessary. Similarly, in the cabtyre windup drum that winds up the cabtyre, the weight of the cabtire from the muddy water surface of the underground hole to the place where the slime treatment device is installed is taken into account. In addition, a winding force associated with the installation location of the slime treatment device is required. According to the present invention, even when the slime treatment device is installed at a position spaced apart from the muddy water surface of the underground hole, the ground control can be performed without sacrificing accurate posture control when the submersible sand pump is lowered. A winding force capable of winding up the lifting mud hose and the cab tire for the length from the muddy water surface of the medium hole to the installation location can be imparted to the lifting mud winding drum and the cab tire winding drum.

  Specifically, by enabling the low-pressure drive of the hoisting hose take-up drum and the cabtyre take-up drum, when descending to the underground hole where precise control and positioning of the hoisting hose is required, It is possible to control the posture of the submersible sand pump to be maintained in the vertical direction. Also, by enabling high-pressure driving, the depth of excavation of the underground hole becomes deep and the feed length of the lifting mud hose and cabtyre increases, and the slime treatment device is connected to the underground hole mud. Even if it is installed at a certain distance from the surface, it can be reliably rolled up to the ground according to the depth of the underground hole and the distance from the muddy water surface of the underground hole to the slime treatment device, making slime removal work efficient Can be done. In addition, since it is not necessary to acquire special skills for the switching operation between the low pressure and the high pressure, the operation is easy.

DESCRIPTION OF SYMBOLS 1 ... Slime processing apparatus 2 ... Swivel base 3 ... Base 4,11 ... Support bracket 5 ... Boom 6 ... Lifting cylinder 7, 12 ... Bearing part 8 ... Main shaft 9 ... Impeller 10 ... Traverser 13 ... Rotating shaft 14 ... Guide 15 ... Connecting rod 20 ... Mud water 21 ... Slime 22 ... Ground hole 22a ... Bottom hole 22b ... Hole wall 22c ... Muddy water surface 23 ... Discharge pipe 24 ... Discharge pipe valve 25,63 ... Piping 26 ... Drain tank 30 ... Drying mud hose 30 ... 31 ... Milling hose winding drum 32 ... Milling hydraulic motor 33 ... Milling hose sheave 34,35,44,45,54,55 ... Sprocket 36,47,56 ... Chain 37 ... Center shaft 40 ... Suspension support Rope 41 ... Suspension branch winding drum 42 ... Suspension branch hydraulic motor 43 ... Suspension branch sheave 46 ... Reducer 50 ... Cab tire 51 ... Cab tire winding drum 52 ... Power feeding hydraulic motor DESCRIPTION OF SYMBOLS 0 ... Muddy water tank 61 ... New muddy water 62 ... Submersible sand pump 70 for supplying muddy water 70 ... Step land 70a ... Lower step 70b ... Upper step 70c ... Inclined land 71, 72, 80 ... Building 75, 83 ... Casing tube 81 ... Underground P, 82: Gantry 82a ... Upper surface 85 ... Casing driver 100 ... Submersible sand pump

Claims (9)

A submersible sand pump suspended on a suspension branch wound so as to be able to be unwound and wound on a suspension winding winding drum, and connected to an underwater sand pump so that it could be unwound and wound on a winding hose winding drum. Of a slime treatment device in a cast-in-place pile construction method equipped with a pumping hose and a cab tire connected to an underwater sand pump wound around a cabtyre wind drum to supply power to the underwater sand pump. Submersible sand pump,
Mud is lowered into the ground hole to complete the excavation as a stable liquid by sucking slime with mud, the slime treatment method in place pile method for discharging by Agedoro on land via a lift mud hose,
The suspension branch winding drum can be driven to rotate in the winding direction or the feeding direction by the suspension support hydraulic motor, and the lifting hose winding drum can be driven to rotate only in the winding direction by the lifting mud hydraulic motor,
When the submersible sand pump descends, the lifting support hose winding drum is rotated in the winding direction and the lifting hose winding drum is rotated while the lifting hose winding drum is in tension. Pull out the rope and lower the submersible sand pump into the underground hole, and feed the mud hose out of the hoist drum.
When the submersible sand pump is lifted, the hoisting hose winding drum and the suspension branch winding drum are driven to rotate in the winding direction, the suspension branch is wound around the suspension branch winding drum, and the submersible sand pump is raised. , Wind the mud hose around the drum
The pressure of the hydraulic motor Agedoro, slime treatment method in place pile method, wherein the winding the Agedoro hose by selecting different pressure during rising and when descending underwater sand pump. The pressure of the hydraulic motor for pumping mud
At the time of the feeding of fried mud hose due to the downward movement of the underwater sand pump, the easy low pressure to maintain the posture of the underwater sand pump in the vertical direction,
During winding of the lifting mud hose with increasing water sand pump, slime treatment method in place pile method of claim 1, wherein the settable to a high pressure corresponding to the winding weight of Agedoro hose. The pressure of low-pressure hydraulic motor Agedoro and 40 Kg / Cm ² or less, slime treatment method in place pile method according to claim 2, wherein the pressure during the high pressure was ^{50Kg / Cm 2 ~80Kg / Cm 2} . The key Yabutaiya winding drum and only rotatably driven in the winding direction by the power supply for the hydraulic motor,
When the submersible sand pump descends, the cab tire take-up drum is unwound from the cab tire take-up drum while the cab tire take-up drum is rotated in the take-up direction and the cab tire is in tension.
When the submersible sand pump rises, the cab tire winding drum is rotated in the winding direction to wind the cab tire around the cab tire winding drum,
The pressure of the feed hydraulic motor, slime treatment method in place pile method according to claim 1, wherein controlling at different pressures during rising and when descending underwater sand pump. The pressure of the hydraulic motor for power feeding
At the time of feeding of the cab tire due to the downward movement of the underwater sand pump, the easy low pressure to maintain the posture of the underwater sand pump in the vertical direction,
During winding of cabtire with increasing water sand pump, slime treatment method in place pile method configurable with claims 4, wherein the pressure corresponding to the winding weight of cabtire. Slime treatment method the pressure during the low-pressure feed hydraulic motor and 30 Kg / Cm ² or less, in place pile method according to claim 5, wherein the pressure during the high pressure was ^{50Kg / Cm 2 ~55Kg / Cm 2} . The slime processing method in the cast-in-place pile method of Claim 1, 2, 3, 4, 5 or 6 which installs a slime processing apparatus spaced apart from the muddy water surface of an underground hole by predetermined distance. The slime processing method in the cast-in-place pile method according to claim 1, 2, 3, 4, 5 or 6, wherein the slime processing device is installed at a predetermined distance from the muddy water surface of the underground hole in the height direction. The slime processing method in the cast-in-place pile method of Claim 7 or 8 which installs a slime processing apparatus on the gantry which has predetermined height from the muddy water surface of an underground hole.

Images