JP2019105272A - Submerged sand pump - Google Patents

Abstract

To provide a submerged sand pump capable of easily switching between suction and injection for muddy water in order to remove slime.SOLUTION: A submerged sand pump is suspended so as to be able to take out or take up, and is inserted into an underground hole where excavation is completed with muddy water as clay suspension, to suction the muddy water, pump it up to the ground and discharge it. As a power source for suctioning muddy water, a motor 170 mounted with drive shafts 170a, 170b at an upper end and a lower end respectively, is equipped so that the drive shafts 170a, 170b are arranged at both ends in a vertical direction, and to the drive shafts 170a, 170b, impellers 155, 165 for suctioning the muddy water are respectively connected.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a submersible sand pump which is suspended and supported so as to be drawn out and rolled up, inserts mud water as a stabilizer into the underground hole where drilling has been completed, sucks the mud water, and lifts and discharges it on the ground. In the cast-in-place piling method as a foundation pile for buildings, slime in cast-in-place piling method in which slime remaining with the muddy water is sucked and discharged out of the underground hole It is used for processing equipment.

  As a cast-in-place piling method as a foundation pile of a building, an earth drill method, a Benot method, a reverse circulation method, etc. are conventionally implemented. In any of these construction methods, muddy water mainly composed of water-bentonite suspension is used as a stabilizer to discharge excavated soil, cool down the drilling machine, prevent ground water etc., prevent collapse of the hole wall, etc. Excavating work is done in the hole. The used mud is degraded to have a high specific gravity, and contains slime which is a residue such as fine mud sand generated by excavation. Therefore, after drilling is completed, it is necessary to replace used mud water with new mud water and remove slime before placing fresh concrete in the next step.

  Although slime suspended in the mud water can be removed by suction with the mud water, it is difficult to remove the slime which has precipitated at the bottom of the pore or remains on the pore wall, and it is also possible to remove it in the mud water. The floating slime also settles on the bottom of the pore with time and adheres to the pore wall. If these slimes remain, ultrasonic measurement to confirm the excavating condition of the underground hole may not be able to measure the excavated tip of the borehole or the wall of the borehole. There is a big problem that it becomes an obstacle in confirming the Above all, when slime remains at the bottom of the hole, if you pour fresh concrete in the next step to construct a pile, there is a layer of slime between the pile bottom and the drilled support layer, Because it plays a role of wood, the pile that has been placed may not be able to achieve its original performance and bearing capacity. In the cast-in-place piling method, removal of slime, among others, removal of slime deposited on the bottom of the hole is one of the most important issues.

  Therefore, as an effective slime removing means, there has been known a means for inserting an underwater sand pump suspended so as to be able to be drawn out and taken up into the underground hole and sucking and removing the slime together with the mud water. In slime processing using this submersible sand pump, it is important to make slime float in the mud water and make it possible to draw in, and it is important to stir the mud water with a stirring blade attached to the submersible sand pump conventionally to make the slime slime It is practiced to increase the suction efficiency by floating in the air. Furthermore, in order to reliably remove slime and build a high-quality cast-in-place pile with excellent load-bearing capacity, mud water sucked by the suction pump installed at the hole bottom is sprayed from the spray nozzle toward the outer periphery of the hole bottom. Means to suspend slime in the mud water (Patent Document 1), and to divert mud water that is sucked into the underwater sand pump and lifted to the ground to be branched and injected into the underground hole, and the flow rate adjustment mechanism Means are also provided for controlling the

Japanese Patent Application Laid-Open No. 2000-120067 JP, 2011-1813, A

  The means for agitating muddy water with the agitating blade attached to the underwater sand pump has a limited agitating range, and in particular, there is an increasing number of constructions of bottomed piles in which the pile bottom extends from the pile shaft, slime removal The effect as a means is questioned. In this respect, as shown in Patent Documents 1 and 2, the means for injecting the mud water once sucked into the submersible sand pump into the underground hole again sprays the mud water over a wide area and precipitates on the bottom of the hole or Since the attached slime can be suspended in the mud water so that it can be sucked together with the mud water, it is effective as a slime removing means.

  Slime often precipitates at the bottom of the underground hole and adheres to the wall of the hole. Above all, the slime in the mud water gradually precipitates with the passage of time, so the amount of slime to be removed is It is the area where it is necessary to spray the mud water to suspend the slime in the mud water. However, since the slime that has precipitated at the bottom of the hole may contain solids such as gravel, when suctioning muddy water from the vicinity of the bottom of the hole, a solid of a predetermined size or more via a strainer Although it is possible to prevent the suction of objects, in order to jet the muddy water due to the aggregation of solids such as gravels contained in the slime that has passed the size of the strainer, the nozzles etc. There is. Once the nozzle etc. are clogged, it is necessary to interrupt the slime removal work and pull up the submersible sand pump to the ground to remove solids such as gravels and eliminate clogs, so that direct work efficiency can be achieved. Will affect the

  In addition, the conventional muddy water injection means as shown in Patent Documents 1 and 2 require the muddy water injection operation separately from the feeding and winding operations of the underwater sand pump, and the handling is complicated and the effect of slime removal is In order to be listed, it is necessary to acquire certain skills and skills.

  Therefore, even at the time of landing on the bottom of the hole, a certain distance from the vicinity of the bottom of the hole is separated, and the mud water in a region containing less solid matter such as sand is sucked and jetted to the bottom of the hole. The mud water can be jetted to the hole bottom without needing special operation or learning in conjunction with the feeding / winding operation of the sheet, and the slime deposited on the hole bottom can be suspended in the mud water, so that the water jet can Effect on the entire bottom of the underground hole and the wall of the underground hole, thereby more reliably removing slime which precipitates on the bottom of the hole and adheres to the wall of the bore, and in particular remains on the bottom. Is desired.

  Therefore, the present invention solves the above-mentioned problems, and slime in the bottom of a spread-bottomed pile, which is likely to remain slime, particularly slime, which precipitates in the bottom of the hole and remains on the pore wall and remains. It is possible to construct a cast-in-place pile that accurately reflects design specifications by enabling efficient removal, reducing residual slime, and improving the accuracy of hole wall measurement in excavated underground holes. In addition, even when the bottom of the hole is bottomed, a certain distance from the bottom of the hole is separated by a certain distance to make it possible to suck in the muddy water in the area containing less solid matter such as gravel, and further the muddy water for slime removal It is an object of the present invention to provide an underwater sand pump which can be easily performed without requiring any special operation by interlocking the switching operation of suction and injection with the feeding and winding operations of the underwater sand pump. It is set to.

  In order to achieve the object of the present invention, according to claim 1, a motor having a drive shaft at its upper and lower ends as a power source and having an impeller connected to the drive shaft, the drive shaft in the vertical direction It provides as a basis the submersible sand pump arranged and equipped at both ends.

  An underwater sand pump according to claim 2, suspended and extended so as to be drawn out and taken up, inserting the muddy water as a stabilizing solution into the underground hole which has been completely excavated, sucking the muddy water, and pumping it up to the ground and discharging it. As a power source for suctioning mud water, a motor equipped with a drive shaft at the upper end and at the lower end respectively, the drive shaft is disposed at both ends in the vertical direction, and an impeller for suctioning mud water is connected to the drive shaft I will provide a.

  An underwater sand pump according to claim 3, suspended and drawn out and taken up, inserted into the underground hole where mud water has been excavated as a stabilizer, sucks the mud water, and lifts and discharges it on the ground, As a power source for sucking in the muddy water, a motor equipped with a lifting drive shaft at the lower end and a spraying drive shaft at the upper end, a spraying drive shaft at the upper end in the vertical direction, and a lifting drive shaft in the vertical direction The pump is disposed at the lower end of the pump, and the pump shaft for pumping mud is connected to the impeller for pumping mud, and the driver shaft for injection is linked to the impeller for sucking mud to drive the motor. There is provided a configuration in which both the lifting mud drive shaft and the injection drive shaft rotate at all times.

  According to the fourth aspect of the present invention, the submersible sand pump is provided with a suction pipe for lifting mud supplied to the lifting mud pipe to lift the mud water sucked by the lifting mud impeller to the ground, and the mud water sucked by the injection impeller is underground. A suction pipe for injection to supply the mud pipe for injection into the hole, a jet pipe connected to the tip of the mud pipe, and an open / close valve for the mud pipe are provided. In the lower part, a suction pipe for injection is installed at a fixed distance away from the suction pipe for mud in the vertical direction, and the on-off valve is opened to inject the mud water sucked from the suction pipe for injection through the mud pipe. A configuration is provided that enables injection from a pipe into the underground hole.

  According to claim 5, the on-off valve performs an opening operation interlocking with the submersible sand pump bottoming at the hole bottom, and performs a closing operation interlocking with the submersible sand pump moving away from the bottom According to claim 6, during the closing operation of the on-off valve, the mud water is discharged to the ground from the mud pipe, and when the on-off valve is opened, all or one of the drainage of the mud water to the ground from the mud pipe According to a seventh aspect of the present invention, the suction pipe is connected to the lower part of the pumping pipe, and the suction pipe is connected to the jet pipe and the pumping pipe. According to a ninth aspect of the present invention, the jet pipe is provided with a plurality of jet nozzles, and according to the tenth aspect, the jet nozzles are installed in different directions. 11, the suction pipe for injection sucks from the suction pipe to the water supply pipe of the submersible sand pump. It was muddy water, fed to the injection pipe by opening operation and closing valve equipped in a sheet mud pipe to provide injectable and was constructed again in the ground hole of the injection nozzle.

  According to claim 12, the submersible sand pump is equipped with a suspension hydraulic cylinder for suspending and supporting the submersible sand pump and an opening and closing hydraulic cylinder for opening and closing an opening and closing valve, and the opening and closing operation of the opening and closing valve is an opening and closing hydraulic cylinder The present invention provides a configuration that is performed by the telescopic movement of the rod. Further, according to claim 13, the hydraulic oil discharged from the rod side of the opening and closing hydraulic cylinder is supplied to the rod side of the hanging hydraulic cylinder by the extension of the rod of the opening and closing hydraulic cylinder. Provides a configuration for reducing the rod.

  According to claim 14, the submersible sand pump is equipped with an open / close accumulator for controlling the open / close hydraulic cylinder, and in conjunction with the bottom of the submersible sand pump at the bottom of the hole, the hydraulic oil in the open / close accumulator is opened or closed. The injection suction pipe and the injection pipe are fed by supplying pressure to the head side of the opening and closing hydraulic cylinder by storage pressure in the storage accumulator to extend the rod, and opening the opening and closing valve via the link connected to the rod. There is provided a configuration in which the mud water sucked into the injection suction pipe is communicated from the injection pipe into the underground hole.

  According to claim 15, the rod of the suspension hydraulic cylinder is extended in conjunction with the underwater sand pump moving away from the hole bottom, and the hydraulic oil discharged from the rod side of the suspension hydraulic cylinder is opened and closed. By supplying the rod side of the cylinder, the rod of the opening and closing hydraulic cylinder is contracted, and the opening and closing valve is closed by storing the hydraulic oil on the head side of the opening and closing hydraulic cylinder in the opening and closing accumulator. Provide a configuration to stop the injection of

  According to the sixteenth aspect of the present invention, a vacuum accumulator for supplying the hydraulic oil to the head side of the suspension hydraulic cylinder or storing the hydraulic oil discharged from the head side is equipped, and the bottom of the underwater sand pump is grounded. The hydraulic oil discharged from the head side of the suspension hydraulic cylinder is stored in the vacuum accumulator, and when separating from the bottom of the submersible sand pump, the hydraulic oil in the vacuum accumulator is stored by the accumulation pressure of the vacuum accumulator. According to claim 17, the configuration for supplying the head side of the suspension hydraulic cylinder to the head side of the hydraulic cylinder for opening and closing, and the hydraulic oil connecting the rod side hydraulic fluid of the suspension hydraulic cylinder and the hydraulic oil on the rod side of the suspension hydraulic cylinder Provided is a configuration equipped with a replenishment accumulator that supplies hydraulic fluid.

  The first feature of the present invention described above is equipped with a drive shaft at the upper end and the lower end, and a motor in which the impeller is connected to the drive shaft, the drive shaft being disposed at both ends in the vertical direction. Therefore, mud water can be sucked into the submersible sand pump from each of the impellers. Therefore, the mud sucked from one impeller can be lifted to the ground, and the mud sucked from the other impeller can be jetted into the underground hole, and the mud can be lifted to the ground and the underground hole for the mud. The inward injection can be performed simultaneously, and the time loss can be reduced and the mud removal operation can be performed efficiently. The second feature is that the turbulent flow of the mud generated by injecting the mud sucked into the submersible sand pump causes the slime that is deposited at the bottom of the pore or adheres to the pore wall to be suspended in the mud, It can be sucked by an underwater sand pump. The third feature is that the mud water can be pumped up while the mud water is jetted while the underwater sand pump is in contact with the bottom of the hole with the most slime. The fourth feature is that mud injected in the underground hole is not in the vicinity of the hole bottom where solids such as sand are often contained, but it is separated from the hole bottom by a fixed distance in the ground direction and contains solids such as sand While sucking in the muddy water of the area where it is less likely to occur, the sucked muddy water can be jetted near the bottom of the hole. The fifth feature is that the submersible sand pump performs the operation of injecting muddy water by landing on the bottom of the hole and stops the injection by beating off, so that no special operation is required for the muddy water injection. It is. The sixth feature is that the injection of muddy water at the bottom of the hole can also suspend slime that has accumulated over a wide area at the bottom of the bottomed pile. Specifically, it is as follows.

  In the underground hole where mud water is used as a stabilizing solution and excavated, the underwater sand pump is used to pump up and discharge the mud water using the underwater sand pump. Equipped with a suction pipe for feeding mud and a suction pipe for jet feeding for supplying mud fluid to be injected into the underground hole to the feed pipe independently of each other, By injecting into the borehole to generate the turbulent flow of the mud water, slime that precipitates at the bottom of the borehole or adheres to the pore wall is suspended in the mudwater, and the slime is sucked with the mudwater, and the mud is lifted to the ground. Can be discharged. As a result, it becomes possible to efficiently remove slime which has precipitated in the bottom of the pore and which has been conventionally difficult to remove or which remains on the pore wall and remains, thereby improving the slime removal rate and reducing the residual slime. It is possible to construct a cast-in-place pile that accurately reflects the design specifications by improving the accuracy of the hole wall measurement of the drilled underground hole. In particular, construction has recently increased, and it is possible to effectively remove slime in the bottom portion of the bottomed pile which has been difficult to remove by the conventional method.

  Submersible sand pump is equipped with a drive shaft for lifting mud at the lower end and a motor with a drive shaft for injection at the upper end as a power source for sucking the muddy water, drive for lifting mud at the upper end in the vertical direction The shaft is installed at the lower end in the vertical direction, and a lifting impeller for sucking mud is connected to the lifting drive shaft, and an injection impeller for sucking mud is connected to the injection drive shaft. At the time of driving, by adopting a configuration in which the driving shaft for lifting mud and the driving shaft for injection always rotate, the mud water injected to the underground hole is lifted from the suction pipe for lifting mud to lift it to the ground. Mud water drawn from the suction pipe for injection can be supplied to the feed pipe through an independent route different from the mud water drawn into the pipe, and can be injected from the injection nozzle of the injection pipe connected to the feed pipe. That is, since the muddy water to be jetted can be sucked from a place different from the muddy water to be lifted, slime containing solid matter such as gravels is also precipitated at the time of landing of the underwater sand pump. Since the muddy water in a region containing little solid matter such as gravel can be sucked and used for injection, not in the vicinity of a certain hole bottom but away from the vicinity of the hole bottom by a fixed distance from the hole bottom. As compared with the case where the muddy water is sucked and jetted from the vicinity, the solid matter such as sand grit contained in the slime does not clog the nozzle or the like that jets the muddy water. In addition, it is possible to rotate the single-motor with the single-motor, which is equipped with the mud impeller mounted on the mud suction pipe, and the spray impeller mounted on the jet suction pipe.

  In addition, since the pumping pipe for the mud is installed so as to be located between the injection pipe and the pumping pipe, the mud to be jetted to the underground hole is directed from the suction place of the mud to the underwater sand pump It is possible to generate the turbulent flow of the mud water more efficiently because At the time of closing operation of the on-off valve, discharge to the ground from the mud pipe is performed as in the conventional case. On the other hand, at the time of the opening operation of the on-off valve, the whole discharge from the floating mud pipe to the ground is stopped and only injection into the underground hole is performed, or part of the discharge from the floating mud pipe to the ground is stopped. It is also possible to carry out the lifting mud and the injection simultaneously, and it is possible to control the lifting mud and the injection separately.

  Since the injection of muddy water is performed by opening the on-off valve mounted on the muddy pipe in conjunction with the fact that the underwater sand pump has bottomed at the bottom of the hole, the effect of the muddy water injection is on the entire bottom of the underground hole and the hole wall It is possible to exert up to. In addition, since the operation of stopping the injection of muddy water is performed by closing the on-off valve equipped on the feed pipe in conjunction with the fact that the underwater sand pump has left the bottom of the hole, the operation of muddy water injection and lifting mud is switched smoothly be able to. That is, since the injection of muddy water is performed in conjunction with the feeding and winding operations of the submersible sand pump, no special operation or learning is required for the injection of muddy water.

  In addition, the effect of the muddy water injection can be exerted on the whole area of the expanded bottom of the underground hole and the wall of the hole, and slime can be effectively suspended in the muddy water by the muddy water injection. It is possible to reliably remove slime adhering to the pore wall and remaining, particularly slime remaining in the bottom. Therefore, it becomes possible to remove efficiently the slime which deposits over a wide area on the spread bottom of a spread bottom pile where slime tends to remain and removal thereof is difficult, and slime adhering to the pore wall can be efficiently removed. It is possible to construct a cast-in-place pile that accurately reflects the design specifications by reducing residual slime and improving the accuracy of hole wall measurement in excavated underground holes.

  The opening and closing operation of the on-off valve installed in the mud pipe to inject the mud water is performed by the link connected to the rod of the opening and closing hydraulic cylinder, and the extension and contraction operation of the rod of the opening and closing hydraulic cylinder for operating the link is The hydraulic oil stored in the opening and closing accumulator is made to flow into and out of the opening and closing hydraulic cylinder. Further, the inflow and outflow of the hydraulic oil from the opening and closing accumulator to the opening and closing hydraulic cylinder suspends the submersible sand pump via the suspension hydraulic cylinder, and the bottom and bottom of the submersible sand pump to the bottom of the hole. The operation is performed by moving the hydraulic fluid between the hanging hydraulic cylinder and the opening / closing hydraulic cylinder in conjunction with the bottom. Therefore, it is possible to reliably perform the injection and stop of the mud water in conjunction with the operation of the underwater sand pump.

  Further, since the replenishment accumulator is interposed in the movement of the hydraulic oil between the suspension hydraulic cylinder and the opening / closing hydraulic cylinder, excess or deficiency of the hydraulic oil does not occur. Furthermore, since the hydraulic oil flows in and out of the vacuum accumulator in conjunction with the extension and contraction of the rod on the head side of the hydraulic cylinder for suspension, it also responds to problems such as oil shortage in the packing during long-term use can do.

Explanatory drawing which shows the underwater sand pump at the time of injection of mud water. Explanatory drawing which shows the underwater sand pump at the time of injection stop of muddy water. Front view of an underwater sand pump. Side view of an underwater sand pump. AA arrow view of FIG. Principal part explanatory drawing of a submersible sand pump. The whole perspective view of the injection pipe. Operation | movement explanatory drawing of the underwater sand pump at the time of injection of mud water. Operation explanatory drawing of the underwater sand pump at the time of the injection stop of muddy water. 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 of the processing method of a slime. Explanatory drawing of the processing method of a slime. (A) Explanatory drawing of the injection condition of muddy water, (b) Explanatory drawing at the time of the bottom to a hole bottom. The whole block diagram of a slime processing device. Explanatory drawing which shows the use condition of a slime processing apparatus.

  Hereinafter, an embodiment of the underwater sand pump according to the present invention will be described based on the drawings. First, the basic configuration of the slime processing apparatus 1 using the underwater sand pump 100 according to the present invention will be described using FIG. 16 and FIG. FIG. 16 is an entire configuration diagram of the slime processing apparatus 1, and FIG. 17 is an explanatory view showing a use state thereof. In the drawing, for convenience, a conventional underwater sand pump 2 is shown instead of the underwater sand pump 100 according to the present invention. The basic configuration of the slime processing apparatus 1 described with reference to this figure is a configuration in which the submersible sand pump 2 is suspended so as to be drawn out and taken up, and this configuration suspends the submersible sand pump 100 according to the present invention. The same is true for cases.

  In the figure, a base 5 having a predetermined width and having a rectangular shape in plan view is mounted on a pivot table 4 so as to be pivotable. A pair of support brackets 6 having a rectangular shape in a side view having a predetermined height dimension is erected at both widthwise end portions of the substantially central portion of the base 5. The base 7b of the boom 7, which is divided into two parts, is pivotally supported by support portions 6a respectively provided on the side surfaces of the upper end portions of the pair of support brackets 6 so as to project. An outrigger 5 a is attached to the corner of the base 5 in order to maintain the stability of the base 5.

  A relief cylinder 9 is disposed between a midway portion of the boom 7 and a support portion 6 b provided on the side surface of the lower end portion of the support bracket 6. Further, a support shaft 11 is supported by a bearing portion 10 disposed on the upper surface of the support bracket 6, and a pair of left and right rubber belt take-up drums 12 and a lifting hose take-up drum 13 are coaxial with the support shaft 11 , Is rotatably deployed.

  The two rubber belts 3 wound around the pair of left and right rubber belt take-up drums 12 are led out to the rubber belt sheave 14 disposed at the front end 7a of the boom 7, suspended downward from the rubber belt sheave 14, and the front end Is connected to an arm-like traverser 30 to suspend the underwater sand pump 2. The traverser 30 is for maintaining the level of the underwater sand pump 2 suspended in the underground hole 22. The means for suspending the underwater sand pump 2 is not limited to the rubber belt 3, but it is also possible to adopt a chain or other appropriate suspending means.

  A slurry hose 8 is a mud hose, which is wound around a drum hose 13 and is led out to a sheave 15 for a mud hose disposed in the vicinity of a sheave 14 for a rubber belt. It is suspended downward and its tip is connected to the underwater sand pump 2.

  Furthermore, a pair of support brackets 16 are erected in the rear R direction with respect to the pair of support brackets 6 erected on the base 5, and the support shaft 18 is supported by the bearing portion 17 disposed on the upper surface of the support bracket 16. The cabtire take-up drum 19 is rotatably disposed on the support shaft 18. The power supply cabtire 20 wound around the cabtire take-up drum 19 is led out to the cabtire sheave 21 disposed at the front end 7 a of the boom 7 and suspended downward from the cabtire sheave 21. The tip is connected to the motor mounted on the submersible sand pump 2 so as to be able to supply power.

  The boom 7 is divided into two pieces, and a guide 25 having a substantially triangular frame shape is provided on the upper surface of each boom tip 7 a so as to protrude in a side view, and is connected by a connecting rod 26. The cabtire 20 is supported by the connecting rod 26 and led out to the cab sheave 21, and the rubber belt 3 passes through a guide hole drilled in the guide 25 and is led out to the rubber belt sheave 14.

  The slime processing apparatus 1 suspends the submersible sand pump 2 so that it can be drawn out and taken up, inserts the muddy water 23 as a stabilizing solution into the underground hole 22 which has been completely excavated, and is suspended in the muddy water 23 in the underground hole 22 The slime 24 suspended on the bottom 22a of the underground hole 22 or attached to the hole wall 22b of the underground hole 22 is sucked by the underwater sand pump 2 and discharged out of the underground hole 22 for removal. The outline thereof will be described based on FIG.

  As shown in FIG. 17, in the underground hole 22 where the drilling has been completed, mud water 23 as a stabilizer containing deterioration, which is a residue of fine mud sand and the like generated by the drilling, is filled. It is done. The slime processing apparatus 1 is installed at a predetermined position in the vicinity of the underground hole 22, the position of the base 5 on the swivel base 4 is determined, and the posture is stabilized by the outrigger 5a. Next, the relief cylinder 9 is driven to move the boom 7 up and down, and the position of the rubber belt sheave 14 disposed at the tip 7 a of the boom 7 is determined. By feeding the two rubber belts 3, the submersible sand pump 2 is lowered to the area of high specific gravity of the muddy water in the underground hole 22, that is, to the deteriorated area. At this time, the tip end portion of the lifting mud hose 8 drawn out from the lifting mud hose winding drum 13 disposed coaxially with the rubber belt winding drum 12 via the lifting mud hose sheave 15 is connected to the underwater sand pump 2 The power supply cabtire 20 wound around the cabtire winding drum 19 is similarly drawn out via the cabtire sheave 21.

  Next, by supplying power to the cabtire 20, the motor provided to the underwater sand pump 2 is driven to start lifting the muddy water 23, and the rubber belt 3 is gradually lowered to the bottom 22a of the underground hole 22. As a result, the slime 24 suspended in the muddy water 23 by the function of the underwater sand pump 2 or deposited on the pore bottom 22a is sucked along with the muddy water 23 and lifted up to the ground. Further, by pulling up the two rubber belts 3 successively, the slime 24 floating in the mud 23 in the underground hole 22 is sucked together with the mud 23. The muddy water 23 containing the slime 24 sucked into the underwater sand pump 2 is pumped to the outside of the underground hole 22 through the mud hose 8 and equipped with the slime processing apparatus 1, and the base end of the mud hose 8 is It stores in the sludge tank 32 via the piping 31 connected to the discharge pipe valve 28 equipped with the connected discharge pipe (not shown), and performs final disposal. Therefore, by controlling the opening and closing operation and the degree of opening and closing of the discharge pipe valve 28, it is possible to set and manage the presence and the amount of the mud of the mud water 23. At the same time, new muddy water 36 from the muddy water tank 33 is replenished to the underground hole 22 through the muddy water supply submersible sand pump 34 through the piping 35 to replace the slime mixed in the deteriorated muddy water 23 and the new muddy water 36. .

  The underground sand pump 100 according to the present invention is suspended in the slime treatment apparatus 1 so as to be able to be drawn out and wound up, instead of the known underwater sand pump 2 described above. It inserts in and sucks in the muddy water 23, and it is pumped up to the ground and discharged. The configuration of the underwater sand pump 100 will be described below. FIG. 1 is an explanatory view showing the submersible sand pump 100 at the time of injection of muddy water, FIG. 2 is an explanatory view showing the submersible sand pump 100 at the time when the injection of muddy water is stopped, FIG. 3 is a front view of the submersible sand pump 100, and FIG. FIG. 5 is a side view of the sand pump 100, FIG. 5 is an AA arrow view of FIG. 4, FIG. 6 is an explanatory view of main parts of the underwater sand pump 100, FIG. 7 is an overall perspective view of a jet pipe 55, FIG. FIG. 9 is an operation explanatory view of the underwater sand pump 100 when the injection of the mud water 23 is stopped. In FIGS. 1 and 2, for convenience of explanation, the open / close accumulator 80, the replenishment accumulator 85, and the vacuum accumulator 90 are drawn out of the underwater sand pump 100. Further, the configuration of the slime processing apparatus 1 other than the underwater sand pump 100 is the same as the configuration described based on FIGS. 16 and 17.

  As shown in the figure, both ends of the arm-shaped traverser 30 pivotally attached in the vertical direction to the main shaft 111 disposed at the upper end of the upper frame 110 of the underwater sand pump 100 via pivots 112 respectively A hollow socket 113 is pivotally mounted in the vertical direction. The leading end 3a of the rubber belt 3 suspended from the rubber belt sheave 14 is inserted into the hollow portion of the socket 113 and folded back, and the leading end 3a is led out of the socket 113. The rubber belt 3 is fixed to the underwater sand pump 100 by inserting a cotter into it. The traverser 30 is for maintaining the level of the underwater sand pump 100 suspended in the underground hole 22.

  The tip of the rod 61 of the suspension hydraulic cylinder 60 is fixed to the main shaft 111 of the upper frame 110, and the end 62 on the head side is fixed to the lower end of the upper frame 110. Thus, the underwater sand pump 100 is suspended by the suspension hydraulic cylinder 60 via the rubber belt 3. The rod 61 of the hydraulic cylinder 60 for suspension is extended when the underwater sand pump 100 is suspended in the underground hole 22 or in the hollow (see FIG. 2), and is installed in the hole bottom 22a or the ground When it is reduced (see Figure 1).

  The middle frame 120 is connected to the lower surface of the upper frame 110, the lower frame 130 is connected to the lower surface of the middle frame 120, and the bottom frame 140 is connected to the lower surface of the lower frame 130 to form a strength member. The bottom frame 140 is equipped with a suction pipe 150 for sucking the mud 23 and the slime 24. As shown in FIG. 6, the suction pipe 150 for removing mud is a hollow disk having a suction port 150a for removing mud open on the lower surface, and the pump impeller 155 for sucking the mud 23 together with the slime 24 is inside. It is rotatably mounted and installed under the underwater sand pump 100.

  A lifting mud pipe 40 for lifting mud fluid 23 sucked with the slime 24 from the lifting mud suction port 150a by the rotation of the lifting mud impeller 150 is connected to the lifting mud suction pipe 150 on the ground. Reference numeral 156 denotes a stirring blade, which is installed at the lower part of the suction pipe 150 for stirring the mud 23 to assist suction of the slime 24. The mud tube 40 is supported by the bottom frame 140 and extends in the vertical direction, and a mud hose 8 (see FIGS. 16 and 17 and omitted in FIGS. 1 and 2) is connected to the upper opening.

  The middle frame 120 is equipped with a jet suction pipe 160 for suctioning the muddy water 23 independently of the mud suction pipe 150. As shown in FIG. 6, the injection suction pipe 160 is a hollow disk having an injection suction port 160a opened on its upper surface, and is rotatably equipped with an injection impeller 165 for suctioning the muddy water 23 inside. There is. The jet suction pipe 160 is installed so as to have a positional relationship spaced apart from the suction pipe 150 by a fixed distance D in the vertical direction, and the state where the submersible sand pump 100 is drawn out into the underground hole 22 In this case, the siphon tube 150 for lifting mud is located in the direction of the hole bottom 22a, and the suction tube 160 for injection is located at a position separated by a fixed distance D in the ground direction from the sift tube 150 for lifting mud.

  Since the jet suction pipe 160 is separated from the mud suction pipe 150 and is separated by a fixed distance D, solid matter such as gravel or the like is included in the mud water 23 jetted into the underground hole 22. It is possible to suction the muddy water 23 in a region which is separated from the bottom of the hole 22a by a predetermined distance D in the ground direction and is less in the presence of solid matter such as gravel, not near the hole bottom 22a. In FIG. 5, reference numeral 167 denotes a strainer for preventing suction when the mud 23 to be suctioned by the jet suction pipe 160 contains solid matter such as soot having a predetermined size or more. A similar strainer (not shown) is also mounted on the suction pipe 150 for the mud.

  To the injection suction pipe 160, a mud supply pipe 50 for supplying the injection pipe 55 with the mud water 23 sucked from the injection suction port 160a through the strainer 167 by the rotation of the injection impeller 165 is connected. . The mud pipe 50 is suspended and extended, and the injection pipe 55 is connected to the tip thereof. Further, an open / close valve 77 which can be opened and closed by the link 75 is provided inside the mud pipe 50, and by opening and closing the open / close valve 77, the injection suction pipe 160 and the injection pipe 55 are communicated or It is cut off.

  As shown in FIG. 6, as a power source for sucking up and collecting the muddy water 23, the lower end of the motor 170 is equipped with a lifting drive shaft 170a at the lower end and the motor 170 with the injection drive shaft 170b at the upper end. The pump 100 is equipped with a lifting mud drive shaft 170a and an injection drive shaft 170b at both ends in the vertical direction. Then, while connecting the lifting impeller 155 for sucking the mud 23 to the lifting suction pipe 150 to the lifting drive shaft 170a at the lower end, the upper end of the injection impeller 165 for sucking the mud 23 to the injection suction tube 160 When driving the motor 170, the lifting drive shaft 170a and the injection drive shaft 170b are always rotating. Therefore, since the motor 170 is equipped with the injection drive shaft 170b at the upper end and the sift drive shaft 170a at the lower end, the motor 170 has the drive shafts at the upper end and the lower end, respectively. Further, since the injection impeller 165 is connected to the injection drive shaft 170b and the lifting mud impeller 155 is connected to the lifting slurry drive shaft 170a, the upper and lower driving shafts are connected to each other. ing. Then, when the motor 170 is driven, the floating mud impeller 155 and the injection impeller 165 rotate together to suck the mud water 23 into the underwater sand pump 100 from the respective floating suction port 150a and the injection suction port 160a. There is. Note that the lifting mud drive shaft 170a connected to the lifting mud impeller 155 is further extended, and a stirring blade 156 is connected to the tip.

  The mud water 23 sucked from the lifting suction port 150a and the slime 24 into the lifting suction pipe 150 by the rotation of the lifting impeller 155 is lifted from the lifting pipe 40 via the lifting hose 8 to the ground. On the other hand, the mud water 23 sucked into the injection suction pipe 160 together with the slime 24 from the injection suction port 160a by the rotation of the injection impeller 165 operates the link 75 and opens the on-off valve 77 to Since the injection pipe 55 is in communication with the mud pipe 50, the injection pipe 55 can inject water into the mud 23 in the underground hole 22. At the time of this injection, the discharge pipe valve 28 (see FIG. 17) equipped on a discharge pipe (not shown) connected to the base end of the lifting mud hose 8 installed on the ground is opened or closed in whole or in part. Thus, it is possible to stop all or part of the floating mud from the mud pipe 40 to the ground and adjust the amount of floating mud to the ground.

  The head-side end 72 of the opening / closing hydraulic cylinder 70 is fixed to a support bracket 131 attached to a predetermined portion of the lower frame 130, and the tip of the rod 71 is connected to one end of the link 75. Further, the other end of the link 75 is connected to the on-off valve 77. Therefore, as shown in FIG. 1, when the submersible sand pump 100 is seated in the hole bottom 22a and the rod 71 of the opening / closing hydraulic cylinder 70 is extended, the opening / closing valve 77 is opened to inject The suction pipe 160 and the jet pipe 55 communicate with each other through the mud pipe 50, and the mud 23 sucked into the jet suction pipe 160 passes through the mud pipe 50 and is underground from the jet nozzle 57 equipped to the jet pipe 55. It is injected toward the hole bottom 22a and the hole wall 22b in the hole 22. This jet of jet can generate a turbulent flow of the muddy water 23, and float on the muddy water 23 with the slime 24 remaining on the bottom of the hole 22a or adhering to the hole wall 22b. Then, the muddy water 23 in which the slime 24 is floated by the turbulent flow of the muddy water 23 is sucked from the aspiration suction pipe 150 and is sedimented on the ground to be deposited on the hole bottom 22a or adhere to the hole wall 22b. The remaining slime 24 can be removed.

  FIG. 7 is an overall perspective view of the injection pipe 55, and the hollow annular injection pipe 55 is connected to the lower end portion of the mud pipe 50. As shown in FIG. The injection pipe 55 is equipped with one or a plurality of small-diameter injection nozzles 57 with a reduced diameter, and the muddy water 23 is injected from the injection nozzle 57 at a predetermined pressure to make the turbulent flow of the muddy water 23 underground. 22 can be generated. The turbulent flow of the muddy water 23 allows the slime 24 deposited on the hole bottom 22a to be deposited or the slime 24 attached to the hole wall 22b to float in the muddy water 23 and can be brought into a suctionable state. In addition, in order to generate turbulent flow of the muddy water, the injection nozzles 57 are installed in different directions or in different installation heights. In the illustrated example, the mud water 23 is injected upward from the bottom to generate turbulence.

  Since the injection suction pipe 160 is separated from the pumping suction pipe 150 by a fixed distance D in the vertical direction, the submersible sand pump 100 lands on the hole bottom 22a, and the mud water 23 sucked from the injection suction pipe 160 is It is not muddy water 23 in the vicinity of the hole bottom 22 a but muddy water 23 in a region separated in the ground direction by a fixed distance D from the hole bottom 22 a. The slime 24 deposited on the pore bottom 22a may contain solid matter such as sand gravel, and in the case of sucking the muddy water 23 from the vicinity of the pore bottom 22a, a strainer (not shown) was interposed. Even if the solid matter such as gravel contained in slime 24 which passes the size of the strainer is sucked, the jet nozzle etc. may be clogged if the suctioned mud water 23 is jetted by the aggregation of solid matter etc. Since the jet suction pipe 160 is separated from the hole bottom 22a by a predetermined distance D in the ground direction, the muddy water 23 and the slime 24 do not contain solid matter such as gravel. Therefore, there is no possibility that the injection nozzle 57 or the like is closed to interrupt the slime processing operation.

  Further, the injection pipe 55 is positioned in the direction of the hole bottom 22a from the suction pipe 150, and the muddy water 23 is injected from the injection nozzle 57 in the direction of the hole bottom 22a from the suction point of the muddy water 23. Therefore, it is possible to generate a turbulent flow which causes slime 24 deposited in pore bottom 22a or suspended in pore wall 22b to float in muddy water 23, and further the suspended slime 24 together with muddy water 23 is a suction pipe for removing mud. It can be effectively aspirated from 150.

  On the other hand, when the underwater sand pump 100 is suspended in the underground hole 22 and the rod 71 of the opening and closing hydraulic cylinder 70 is contracted as shown in FIG. 77 is closed, the jet suction pipe 160 and the jet pipe 55 are shut off by the mud pipe 50, and the mud 23 sucked from the jet suction pipe 160 is not jetted from the jet pipe 55. On the other hand, the mud water 23 containing the slime 24 sucked from the suction pipe 150 for the mud is brought to the ground from the mud pipe 40 via the mud hose 8 regardless of the presence or absence of the injection of the mud 23 from the jet pipe 55. It is pumped up.

  Next, the opening and closing operation of the opening and closing valve 77 using the opening and closing hydraulic cylinder 70 will be described. Reference numeral 80 denotes an opening / closing accumulator for controlling the opening / closing hydraulic cylinder 70, 85 denotes a replenishment accumulator, and 90 denotes a vacuum accumulator, which are respectively supported by support brackets 132 attached to the lower frame 130 (FIG. 4, See Figure 5). The installation location and installation means of the opening / closing accumulator 80, the replenishment accumulator 85, and the vacuum accumulator 90 may be any appropriate place and means, and are not particularly limited.

  The hydraulic oil on the rod side of the suspension hydraulic cylinder 60 and on the rod side of the opening and closing hydraulic cylinder 70 can be moved relative to each other through the replenishment accumulator 85. The hydraulic fluid on the head side of the suspension hydraulic cylinder 60 and the hydraulic fluid on the head side of the hydraulic cylinder 70 are movable relative to each other.

  The opening / closing accumulator 80, the replenishment accumulator 85, and the vacuum accumulator 90 have known structures, respectively, and are internally defined in two chambers by pradas 80a, 85a, 90a, each of which is a rubber diaphragm. One end of the open / close accumulator 80 defined by the prada 80a is connected to the head side of the open / close hydraulic cylinder 70, and can store hydraulic oil from the open / close hydraulic cylinder 70, and high pressure gas is enclosed in the other. There is. One of the vacuum accumulators 90 defined by the prada 90a is connected to the head side of the suspension hydraulic cylinder 60, and can store the hydraulic oil from the suspension hydraulic cylinder 60, and the high pressure gas is enclosed in the other. It is done. One end of the replenishment accumulator 85 is connected to the rod 71 side of the opening / closing hydraulic cylinder 70 and the rod 61 side of the suspension hydraulic cylinder 60, and the opening / closing hydraulic cylinder 70 and the suspension hydraulic cylinder 60 are connected. The hydraulic oil from the above can be stored, and the other is filled with high pressure gas.

  As shown in FIGS. 1 and 8, when the submersible sand pump 100 lands on the bottom 22a of the underground hole 22, the lifting hydraulic load by the rubber belt 3 is eliminated, so the hydraulic cylinder 60 for suspension is almost unloaded. The head-side pressure of the opening / closing hydraulic cylinder 70 is released. Therefore, the storage pressure of the open / close accumulator 80 overcomes the pressure on the rod side of the open / close hydraulic cylinder 70 which is not loaded, and the hydraulic oil is supplied from the open / close accumulator 80 to the head side of the open / close hydraulic cylinder 70. Extend the When the rod 71 extends, one end of the link 75 connected to the tip of the rod 71 is pushed in, and the on-off valve 77 connected to the other end of the link 75 is opened. The 160 and the injection pipe 55 communicate with each other. That is, the horizontal movement of the opening and closing hydraulic cylinder 70 by the rod 71 is converted by the link 75 into a rotational movement for opening and closing the opening and closing valve 77. Therefore, the mud water 23 sucked into the injection suction pipe 160 of the submersible sand pump 100 for injection is injected from the injection nozzle 57 of the injection pipe 55 toward the hole bottom 22a and the hole wall 22b via the feed pipe 50. Ru.

  The hydraulic oil on the rod 71 side discharged by the extension of the rod 71 of the opening and closing hydraulic cylinder 70 flows into the rod 61 side of the suspension hydraulic cylinder 60 together with the hydraulic oil stored in the replenishment accumulator 85 and the rod 61 Make it smaller. Then, the working oil on the head side of the hanging hydraulic cylinder 60 flows into the vacuum accumulator 90 by the reduction of the rod 61.

  The opening operation of the opening / closing valve 77 by the opening / closing hydraulic cylinder 70 interlocks with the bottom of the underwater sand pump 100 in the hole bottom 22a, that is, via the rubber belt 3 to the rod 61 of the suspension hydraulic cylinder 60. The lifting force to the upper side is not applied by the bottom, and the suspension hydraulic cylinder 60 is automatically operated by being substantially unloaded. Therefore, it is possible to spray the mud water 23 in conjunction with the feeding and winding operations of the submersible sand pump 100 without requiring any special operation.

  As shown in FIGS. 2 and 9, the submersible sand pump 100 is suspended in conjunction with the bottom of the underground hole 22 from being detached from the bottom 22 a of the underground hole 22, that is, by suspending the submersible sand pump 100 via the rubber belt 3. The rod 61 of the support hydraulic cylinder 60 extends. At this time, since the head side of the suspension hydraulic cylinder 60 is in a vacuum state, hydraulic oil is supplied by the storage pressure of the vacuum accumulator 90. The head side of the suspension hydraulic cylinder 60 can also be used in a vacuum state, but from the viewpoint of failsafe to cope with problems such as oil breakage of the packing and deformation of the packing during long-term use, the accumulator for vacuum It is made to supply hydraulic oil from 90.

  By extending the rod 61 of the suspension hydraulic cylinder 60, the hydraulic oil on the rod 61 side is drained, flows into the replenishment accumulator 85 to fill it, and further flows to the rod 71 side of the opening / closing hydraulic cylinder 70, The rod 71 is contracted and the hydraulic oil on the head side is discharged and stored in the open / close accumulator 80.

  The rod 71 of the opening / closing hydraulic cylinder 70 is contracted to draw in one end of the link 75 connected to the tip of the rod 71, close the opening / closing valve 77 connected to the other end of the link 75, and The injection suction pipe 160 and the injection pipe 55 are shut off via this. Therefore, the mud water 23 sucked into the injection suction pipe 160 of the submersible sand pump 100 for injection is not supplied from the feed pipe 50 to the injection pipe 55. Therefore, since the suspension hydraulic cylinder 60 plays a role as a switch for operating the opening / closing hydraulic cylinder 70, the injection of muddy water is interlocked with the bottom and the bottom of the underwater sand pump 100 to the hole bottom 22a. The stop can be switched automatically. The replenishment accumulator 85 is for adjusting the increase or decrease of the hydraulic oil moving on the rod side of the suspension hydraulic cylinder 60 and on the rod side of the opening / closing hydraulic cylinder 70 when performing the above-described operation of injecting and stopping the mud water. is there. Since the hydraulic oil of the opening / closing hydraulic cylinder 70 and the hydraulic cylinder for suspension 60 has a closed circuit, there is no replenishment of the hydraulic oil from the outside. Although the cylinder pistons of the opening / closing hydraulic cylinder 70 and the suspension hydraulic cylinder 60 are equipped with packings and seals, the leakage of hydraulic oil is not zero, and there are some fluctuations. The fluctuation is covered by the hydraulic oil stored in the replenishment accumulator 85 so as to cope with the underpressure due to the leakage of the hydraulic oil from the seal.

  Next, the submersible sand pump 100 of the slime processing apparatus 1 having the above-described configuration is drawn out and inserted into the underground hole 22 which has been completely excavated using the mud water 23 as a stabilizing solution, and the slime 24 is sucked with the mud water 23 to the ground. The slime processing method in the cast-in-place piling method for pumping and discharging will be described for each of steps A to P shown in FIG. 10 to 12 are process explanatory views of the slime treatment method, FIGS. 13 and 14 are explanatory views of the slime treatment method, FIG. 15 (a) is an explanatory view of the muddy water injection situation, and FIG. 15 (b) is a hole It is explanatory drawing at the time of the bottom to a bottom.

[Step A / underground hole drilling completed]
In Step A, with the muddy water 23 as a stabilizing solution, the excavation of a predetermined underground hole 22 for constructing a bottomed pile shown in FIG. 17 is completed. The underground hole 22 which has been completely excavated is filled with muddy water 23 as a stabilizing solution which is deteriorated by the excavation and which contains slime which is a residue such as fine mud sand generated by excavating. The slime 24 floats in the muddy water 23, and may precipitate on the pore bottom 22a or adhere to the pore wall 22b with time.

[Step B / installation of slime processing equipment]
As step B, as shown in FIG. 13, the slime processing apparatus 1 is installed at a predetermined position near the underground hole 22 so that the underwater sand pump 100 can be drawn out and wound up in the muddy water 23 in the underground hole 22. . The specific installation procedure is the same as the installation procedure of the slime processing apparatus 1 on which the conventional underwater sand pump 2 shown in FIG. 17 is suspended.

[Step C / Submersible sand pump input]
As shown in FIG. 14, the submersible sand pump 100 is lowered in the area of high specific gravity of mud water in the underground hole 22 as shown in FIG. Down to the area where At this time, the tip end portion of the lifting mud hose 8 drawn out from the lifting mud hose winding drum 13 disposed coaxially with the rubber belt winding drum 12 through the lifting mud hose sheave 15 is the upper opening portion of the lifting mud tube 40 The power supply cabtire 20 connected to the above and further wound around the cabtire winding drum 19 is similarly drawn out through the cabtire sheave 21.

[Step D: Start underwater sand pump]
In step D, the submersible sand pump 100 is activated in the state shown in FIG. 14 to start suction of the mud water 23 in the underground hole 22 from the mud suction pipe 150. At this time, the stirring blade 156 is driven to stir the muddy water 23 as necessary.

[Step E / Flushing start]
In step E, the mud water 23 sucked from the suction pipe 150 is lifted from the pumping pipe 40 to the outside of the underground hole 22 through the pumping hose 8 and equipped with the slime processing apparatus 1 shown in FIG. The final disposal is carried out by storing in a sludge tank 32 via a pipe 31 connected to a discharge pipe valve 28 (see FIG. 17) equipped to a discharge pipe (not shown) connected to the base end of the lifting mud hose 8. . By the removal of the mud 23, the slime 24 suspended in the mud 23 is also removed.

[Step F / Refill with new mud water]
Since the amount of the mud water 23 in the underground hole 22 is reduced by the start of the pumping in the step E, the new mud 36 is fed from the mud tank 33 by the submersible sand pump 34 for supplying mud as step F together with the pumping mud. The bore hole 22 is replenished to keep the amount of mud water 23 in the underground bore 22 constant.

[Step G / Submersible sand pump bottom]
As shown in Step G, when the submersible sand pump 100 is gradually pumped out into the muddy water 23 while performing submersion work as shown in Step G while performing replenishment of new muddy water shown in Step E and Step F. The submersible sand pump 100 is bottomed at the hole bottom 22a as shown in FIG. 15 (b). The detailed steps from “underwater sand pump bottoming” in step G to “open on-off valve” in step H in the next step will be described based on steps G1 to G8 shown in FIG. 11 and FIG.

[Step G1 / Hydraulic Hydraulic Cylinder No-load Condition]
As shown in step G1, the submersible sand pump 100 is placed on the hole bottom 22a so that the lifting load by the rubber belt 3 is eliminated, so the suspension hydraulic cylinder 60 is substantially unloaded.

[Step G2 / head side pressure release of the opening and closing hydraulic cylinder]
As shown in step G2, when the suspension hydraulic cylinder 60 is substantially unloaded, the head-side pressure of the opening / closing hydraulic cylinder 70 is released.

[Step G3 / the hydraulic oil flows into the head side of the opening and closing hydraulic cylinder from the opening and closing accumulator]
As shown in step G3, the storage pressure of the open / close accumulator 80 overcomes the pressure on the rod side of the open / close hydraulic cylinder 70 with no load, and the hydraulic oil from the open / close accumulator 80 to the head side of the open / close hydraulic cylinder 70. To flow.

[Step G4 / Extend rod of hydraulic cylinder for opening and closing]
As shown in step G4, the rod 71 of the opening and closing hydraulic cylinder 70 is extended by the hydraulic oil from the opening and closing accumulator 80 that has flowed into the head side of the opening and closing hydraulic cylinder 70.

[Step G5 / Push in the link connected to the rod]
As shown in step G5, the rod 71 of the opening / closing hydraulic cylinder 70 is extended to push in one end of the link 75 to which the tip of the rod 71 is fixed.

[Step G 6 / The hydraulic oil discharged from the rod side of the opening / closing hydraulic cylinder flows into the rod side of the suspension hydraulic cylinder]
As shown in step G6, the hydraulic fluid discharged from the rod 71 side of the opening and closing hydraulic cylinder 70 flows into the rod 61 side of the suspension hydraulic cylinder 60 by the extension of the rod 71 of the opening and closing hydraulic cylinder 70. .

[Step G7 / The rod of the hydraulic cylinder for suspension is reduced]
As shown in step G7, the rod 61 of the suspension hydraulic cylinder 60 is contracted by the hydraulic fluid flowing into the rod 61 side of the suspension hydraulic cylinder 60.

[Step G 8 / Accumulate in the vacuum accumulator the hydraulic oil discharged from the head side of the hydraulic cylinder for suspension]
As shown in step G8, the rod 61 of the suspension hydraulic cylinder 60 is contracted by the hydraulic fluid flowing into the rod 61 side of the suspension hydraulic cylinder 60, and is discharged from the head side of the suspension hydraulic cylinder 60. The hydraulic oil is stored in a vacuum accumulator 90.

[Step H / Open / Close valve open]
The submersible sand pump 100 is mounted on the hole bottom 22a, and the rod 71 extends through the steps G1 to G8, whereby the link 75 is connected to the tip of the rod 71 of the opening / closing hydraulic cylinder 70. As shown in step H, the open / close valve 77 connected to the other end of the link 75 is opened, and the injection suction pipe 160 and the injection pipe 55 communicate with each other through the mud pipe 50 as shown in step H.

[Step I / Muddy Water Supply from Mud Pipe to Injection Pipe]
As shown in step I, by opening the on-off valve 77, the injection suction pipe 160 and the injection pipe 55, which were blocked by the on-off valve 77, communicate with each other via the mud pipe 50, The mud 23 sucked and supplied to the mud pipe 50 is also supplied to the jet pipe 55.

[Step J / Stop all or part of the raised mud]
As shown in step J, in conjunction with the opening / closing valve 77 being opened, the discharge pipe valve equipped in the slime treatment apparatus 1 and equipped in a discharge pipe (not shown) to which the base end of the lifting mud hose 8 is connected By closing all or part 28, all or part of the floating of the mud from the mud tube 40 to the ground via the mud hose 8 is stopped. Therefore, it is possible to select whether to simultaneously lift the muddy water 23 sucked into the muddy water suction pipe 150 when the muddy water 23 is jetted, or to stop the collected mud, and it is also possible to adjust the amount of mud collected. is there.

[Step K / Muddy water injection]
As shown in step K, the mud water 23 supplied from the mud supply pipe 50 to the injection pipe 55 is injected from the injection nozzle 57 of the injection pipe 55 toward the hole bottom 22a and the hole wall 22b.

[Step L / turbulence generation]
As shown in step L, muddy water 23 in the underground hole 22 as shown by arrow Y in FIG. 15A by muddy water 23 injected from the injection nozzle 57 toward the hole bottom 22a and the hole wall 22b. Turbulence occurs in the

[Step M / slime floating]
As shown in step M, the turbulent flow generated by the mud 23 injected from the injection nozzle 57 causes sedimentation in the bottom 22 a of the hole 22 or floating of the slime 24 adhering to the pore wall 22 b in the mud 23 As a result, it becomes possible to suction with the muddy water 23 by the muddy suction pipe 150.

[Step N / Submersible Sand Pump Release]
By continuing the injection of the mud water 23 from the injection nozzle 57 for a predetermined time, the rubber belt winding drum 12 is settled after settling in the hole bottom 22a or suspending the slime 24 adhering to the hole wall 22b in the mud water 23. The submersible sand pump 100 is lifted from the bottom 22a of the underground hole 22 by lifting the rubber belt 3 by the above. The detailed steps from the “underwater sand pump release bottom” of this step N to the “open / close valve closing” of step O of the next step will be described based on steps N1 to N6 shown in FIG. 12 and FIG.

[Step N1 / The rod of the hydraulic cylinder for suspension extends]
As shown in Step N1, the lifting load by the rubber belt 3 is applied to the suspension hydraulic cylinder 60 by the underwater sand pump 100 moving away from the hole bottom 22a, so the rod 61 of the suspension hydraulic cylinder 60 extends Do.

[Step N 2 / Supply hydraulic oil from the vacuum accumulator to the head side of the hydraulic cylinder for suspension]
As shown in step N2, the head side of the suspension hydraulic cylinder 60 is in a vacuum state by the extension of the rod 61 of the suspension hydraulic cylinder 60, so hydraulic oil is supplied by the storage pressure of the vacuum accumulator 90. Do. The head side of the suspension hydraulic cylinder 60 can also be used in a vacuum state, but from the viewpoint of failsafe to cope with problems such as oil breakage of the packing and deformation of the packing during long-term use, the accumulator for vacuum It is made to supply hydraulic oil from 90.

[Step N 3 / The hydraulic oil discharged from the rod side of the suspension hydraulic cylinder flows into the rod side of the opening / closing hydraulic cylinder]
As shown in step N 3, when the rod 61 of the suspension hydraulic cylinder 60 is extended, the discharged hydraulic oil flows into the rod 71 side of the opening / closing hydraulic cylinder 70, and the surplus is stored in the accumulator 85 for replenishment. Flow into and are stored.

[Step N4 / The rod of the hydraulic cylinder for opening and closing is reduced]
As shown in Step N4, the rod 71 of the opening and closing hydraulic cylinder 70 is contracted by the hydraulic fluid flowing from the rod 61 side of the suspension hydraulic cylinder 60 to the rod 71 side of the opening and closing hydraulic cylinder 70.

[Step N5: Hydraulic oil discharged from the head side of the opening and closing hydraulic cylinder is stored in the opening and closing accumulator]
As shown in Step N5, the hydraulic fluid on the head side discharged by the reduction of the rod 71 of the opening and closing hydraulic cylinder 70 is stored in the opening and closing accumulator 80.

[Step N6 / Pull in the link connected to the rod]
As shown in Step N6, the rod 71 of the opening / closing hydraulic cylinder 70 is contracted to draw in one end of the link 75 to which the tip of the rod 71 is fixed.

[Step O / Open / Close valve closed]
As shown in step O, the submersible sand pump 100 separates from the hole bottom 22a, so that the submersible sand pump 100 is suspended via the rubber belt 3 via the steps N1 to N6. The rod 61 of the hydraulic cylinder 60 is extended, and the hydraulic oil on the rod 61 side is discharged and flows into the rod 71 side of the opening / closing hydraulic cylinder 70 to reduce the rod 71 and the surplus flows into the replenishment accumulator 85 Are stored. Then, the link 75 is retracted by the reduction of the rod 71, whereby the on-off valve 77 connected to the link 75 is closed.

[Step P / Muddy water injection stop]
As shown in Step P, by closing the on-off valve 77, the injection suction pipe 160 and the injection pipe 55 which are in communication with each other through the mud pipe 50 are shut off, and the injection suction pipe 160 sucks and supplies. The mud 23 supplied to the mud pipe 50 is not supplied to the injection pipe 55. Therefore, by opening the discharge pipe valve 28 equipped on the discharge pipe (not shown) connected to the base end of the lifting mud hose 8 on the ground, the slime 24 suspended in the mud water 23 together with the mud water 23 for lifting mud. It is sucked by the suction pipe 150, is pumped to the ground via the mud pipe 40 and the mud hose 8, and is stored in the sludge tank 32 via the pipe 31 connected to the discharge pipe valve 28.

  The first feature of the present invention described above is equipped with a drive shaft at the upper end and the lower end, and a motor in which the impeller is connected to the drive shaft, the drive shaft being disposed at both ends in the vertical direction. Therefore, mud water can be sucked into the submersible sand pump from each of the impellers. Therefore, the mud sucked from one impeller can be lifted to the ground, and the mud sucked from the other impeller can be jetted into the underground hole, and the mud can be lifted to the ground and the underground hole for the mud. The inward injection can be performed simultaneously, and the time loss can be reduced and the mud removal operation can be performed efficiently. The second feature is that the turbulent flow of the mud generated by injecting the mud sucked into the submersible sand pump causes the slime that is deposited at the bottom of the pore or adheres to the pore wall to be suspended in the mud, It can be sucked by an underwater sand pump. The third feature is that the mud water can be pumped up while the mud water is jetted while the underwater sand pump is in contact with the bottom of the hole with the most slime. The fourth feature is that mud injected in the underground hole is not in the vicinity of the hole bottom where solids such as sand are often contained, but it is separated from the hole bottom by a fixed distance in the ground direction and contains solids such as sand While sucking in the muddy water of the area where it is less likely to occur, the sucked muddy water can be jetted near the bottom of the hole. The fifth feature is that the submersible sand pump performs the operation of injecting muddy water by landing on the bottom of the hole and stops the injection by beating off, so that no special operation is required for the muddy water injection. It is. The sixth feature is that the injection of muddy water at the bottom of the hole can also suspend slime that has accumulated over a wide area at the bottom of the bottomed pile. Specifically, it is as follows.

  In the underground hole where mud water is used as a stabilizing solution and excavated, the underwater sand pump is used to pump up and discharge the mud water using the underwater sand pump. Equipped with a suction pipe for feeding mud and a suction pipe for jet feeding for supplying mud fluid to be injected into the underground hole to the feed pipe independently of each other, By injecting into the borehole to generate the turbulent flow of the mud water, slime that precipitates at the bottom of the borehole or adheres to the pore wall is suspended in the mudwater, and the slime is sucked with the mudwater, and the mud is lifted to the ground. Can be discharged. As a result, it becomes possible to efficiently remove slime which has precipitated in the bottom of the pore and which has been conventionally difficult to remove or which remains on the pore wall and remains, thereby improving the slime removal rate and reducing the residual slime. It is possible to construct a cast-in-place pile that accurately reflects the design specifications by improving the accuracy of the hole wall measurement of the drilled underground hole. In particular, construction has recently increased, and it is possible to effectively remove slime in the bottom portion of the bottomed pile which has been difficult to remove by the conventional method.

  Submersible sand pump is equipped with a drive shaft for lifting mud at the lower end and a motor with a drive shaft for injection at the upper end as a power source for sucking the muddy water, drive for lifting mud at the upper end in the vertical direction The shaft is installed at the lower end in the vertical direction, and a lifting impeller for sucking mud is connected to the lifting drive shaft, and an injection impeller for sucking mud is connected to the injection drive shaft. At the time of driving, by adopting a configuration in which the driving shaft for lifting mud and the driving shaft for injection always rotate, the mud water injected to the underground hole is lifted from the suction pipe for lifting mud to lift it to the ground. Mud water drawn from the suction pipe for injection can be supplied to the feed pipe through an independent route different from the mud water drawn into the pipe, and can be injected from the injection nozzle of the injection pipe connected to the feed pipe. That is, since the muddy water to be jetted can be sucked from a place different from the muddy water to be lifted, slime containing solid matter such as gravels is also precipitated at the time of landing of the underwater sand pump. Since the muddy water in a region containing little solid matter such as gravel can be sucked and used for injection, not in the vicinity of a certain hole bottom but away from the vicinity of the hole bottom by a fixed distance from the hole bottom. As compared with the case where the muddy water is sucked and jetted from the vicinity, the solid matter such as sand grit contained in the slime does not clog the nozzle or the like that jets the muddy water. In addition, it is possible to rotate the single-motor with the single-motor, which is equipped with the mud impeller mounted on the mud suction pipe, and the spray impeller mounted on the jet suction pipe.

  In addition, since the pumping pipe for the mud is installed so as to be located between the injection pipe and the pumping pipe, the mud to be jetted to the underground hole is directed from the suction place of the mud to the underwater sand pump It is possible to generate the turbulent flow of the mud water more efficiently because At the time of closing operation of the on-off valve, discharge to the ground from the mud pipe is performed as in the conventional case. On the other hand, at the time of the opening operation of the on-off valve, the whole discharge from the floating mud pipe to the ground is stopped and only injection into the underground hole is performed, or part of the discharge from the floating mud pipe to the ground is stopped. It is also possible to carry out the lifting mud and the injection simultaneously, and it is possible to control the lifting mud and the injection separately.

  Since the injection of muddy water is performed by opening the on-off valve mounted on the muddy pipe in conjunction with the fact that the underwater sand pump has bottomed at the bottom of the hole, the effect of the muddy water injection is on the entire bottom of the underground hole and the hole wall It is possible to exert up to. In addition, since the operation of stopping the injection of muddy water is performed by closing the on-off valve equipped on the feed pipe in conjunction with the fact that the underwater sand pump has left the bottom of the hole, the operation of muddy water injection and lifting mud is switched smoothly be able to. That is, since the injection of muddy water is performed in conjunction with the feeding and winding operations of the submersible sand pump, no special operation or learning is required for the injection of muddy water.

  Moreover, since the effect of the muddy water injection can be exerted on the whole area of the expanded bottom of the underground hole and the hole wall, and the slime can be effectively suspended in the muddy water by the muddy water injection, precipitation on the hole bottom more reliably It is possible to reliably remove slime adhering to the pore wall and remaining, particularly slime remaining in the bottom. Therefore, it becomes possible to remove efficiently the slime which deposits over a wide area on the spread bottom of a spread bottom pile where slime tends to remain and removal thereof is difficult, and slime adhering to the pore wall can be efficiently removed. It is possible to construct a cast-in-place pile that accurately reflects the design specifications by reducing residual slime and improving the accuracy of hole wall measurement in excavated underground holes.

  The opening and closing operation of the on-off valve installed in the mud pipe to inject the mud water is performed by the link connected to the rod of the opening and closing hydraulic cylinder, and the extension and contraction operation of the rod of the opening and closing hydraulic cylinder for operating the link is The hydraulic oil stored in the opening and closing accumulator is made to flow into and out of the opening and closing hydraulic cylinder. Further, the inflow and outflow of the hydraulic oil from the opening and closing accumulator to the opening and closing hydraulic cylinder suspends the submersible sand pump via the suspension hydraulic cylinder, and the bottom and bottom of the submersible sand pump to the bottom of the hole. The operation is performed by moving the hydraulic fluid between the hanging hydraulic cylinder and the opening / closing hydraulic cylinder in conjunction with the bottom. Therefore, it is possible to reliably perform the injection and stop of the mud water in conjunction with the operation of the underwater sand pump.

  Further, since the replenishment accumulator is interposed in the movement of the hydraulic oil between the suspension hydraulic cylinder and the opening / closing hydraulic cylinder, excess or deficiency of the hydraulic oil does not occur. Furthermore, since the hydraulic oil flows in and out of the vacuum accumulator in conjunction with the extension and contraction of the rod on the head side of the hydraulic cylinder for suspension, it also responds to problems such as oil shortage in the packing during long-term use can do.

DESCRIPTION OF SYMBOLS 1 ... Slime processing apparatus 2, 100 ... Submersible sand pump 3 ... Rubber belt 4 ... Swivel stand 5 ... Base 6, 16, 131, 132 ... Support bracket 7 ... Boom 8 ... Lifting mud hose 9 ... Corrugating cylinder 10 ... Bearing part 11, 18, 112 ... Support shaft 12 ... Rubber belt take-up drum 13 ... Pumped mud hoses 14 ... Sheaves for rubber belts 15 ... Pumps made of mud hoses 17 ... Bearings 19 ... Cab tire take-up drums 20 ... Cab tires 21 ... Shiva for cab tires 22 ... underground hole 22a ... bottom 22b ... hole wall 23 ... muddy water 24 ... slime 25 ... guide 26 ... connection pipe 28 ... discharge pipe valve 30 ... traversa 31, 35 ... piping 32 ... sludge tank 33 ... Muddy water tank 34 ... Submersible sand pump 40 for mud water supply ... Pumping mud pipe 50 ... Mud pipe 55 ... Injection pipe 57 ... Injection nozzle 60 ... Hydraulic system for suspension 61, 71 ... rod 62, 72 ... end on head side 70 ... hydraulic cylinder for opening and closing 75 ... link 77 ... opening and closing valve 80 ... accumulator for opening and closing 85 ... accumulator for replenishment 90 ... accumulator for vacuum 110 ... upper frame 113 ... socket 120: Medium frame 130: Lower frame 140: Bottom frame 150: Suction pipe for mud 150a: Suction port for mud 155: Impeller for mud 156 ... Agitation blade 160 ... Suction pipe 160 for injection 160a ... Suction port 165 for injection Impeller for injection 167 ... Strainer 170 ... Motor 170a ... Drive shaft for lifting mud 170b ... Drive shaft for injection

Claims (17)

As a power source
An underwater sand pump having a drive shaft at each of upper and lower ends, and a motor in which an impeller is connected to the drive shaft, the drive shaft being disposed at both ends in the vertical direction. In the underwater sand pump which is supported so that it can be drawn out and rolled up, and the mud water is inserted as a stabilizing solution into the underground hole which has been completely excavated to suck up the mud water and lift it up to the ground and discharge it,
Motors equipped with drive shafts at the upper and lower ends, respectively, are equipped with the drive shafts disposed at both ends in the vertical direction as a power source for suctioning mud water, and an impeller for suctioning mud water is connected to the drive shafts. Submersible sand pump characterized by In the underwater sand pump which is supported so that it can be drawn out and rolled up, and the mud water is inserted as a stabilizing solution into the underground hole which has been completely excavated to suck up the mud water and lift it up to the ground and discharge it,
As a power source for sucking in the muddy water, a motor equipped with a lifting drive shaft at the lower end and a spraying drive shaft at the upper end, a spraying drive shaft at the upper end in the vertical direction, and a lifting drive shaft in the vertical direction The pump is disposed at the lower end of the pump, and the pump shaft for pumping mud is connected to the impeller for pumping mud, and the driver shaft for injection is linked to the impeller for sucking mud to drive the motor. An underwater sand pump characterized in that a lifting mud drive shaft and a jetting drive shaft both rotate at all times. In the submersible sand pump,
A suction pipe for the mud that supplies the sludge to the ground in order to pump the mud drawn by the impeller for the mud to the ground, and a feed pipe for injecting the mud drawn by the impeller for injection into the underground hole Provided with a suction pipe for injection, a jet pipe connected to the tip of the mud pipe, and a switching valve for the mud pipe,
Install a suction pipe for lifting mud at a lower part of the submersible sand pump and a suction pipe for injection at a fixed distance away from the suction pipe for lifting mud at the upper part in the vertical direction,
4. The submersible sand pump according to claim 3, wherein mud water sucked from the suction pipe for injection can be jetted from the jet pipe into the underground hole through the feed pipe by opening the on-off valve.   The submersible according to claim 4, wherein the on-off valve performs an opening operation in conjunction with the submersible sand pump being bottomed at the bottom of the hole and performs a closing operation in conjunction with the submersible sand pump being separated from the bottom. Sand pump.   A means is provided for discharging mud to the ground from the mud pipe at the time of closing the on-off valve and stopping all or part of the discharge of mud to the ground from the mud pipe at the time of opening the on-off valve. The submersible sand pump according to claim 4 or 5.   The submersible sand pump according to claim 4, 5 or 6, wherein a mud suction pipe is connected to a lower portion of the mud pipe.   The submersible sand pump according to any one of claims 4, 5, 6 or 7, wherein the mud suction pipe is provided so as to be located between the jet pipe and the mud pipe.   9. The submersible sand pump according to claim 4, wherein the jet pipe is equipped with a plurality of jet nozzles.   The submersible sand pump according to claim 9, wherein the jet nozzles are installed in different directions.   Mud water drawn from the injection suction pipe to the water supply pipe of the submersible sand pump is supplied to the injection pipe by opening the on-off valve mounted on the water supply pipe, and can be injected again into the underground hole from the injection nozzle The submersible sand pump according to claim 9 or 10. In the submersible sand pump,
It is equipped with a hydraulic suspension cylinder for suspending the underwater sand pump, and a hydraulic cylinder for opening and closing the opening and closing valve.
The submersible sand pump according to any one of claims 4, 5, 6, 7, 8, 9, 10 or 11, wherein the opening and closing operation of the opening and closing valve is performed by extension and contraction of a rod of the opening and closing hydraulic cylinder.   The extension of the rod of the opening and closing hydraulic cylinder supplies the hydraulic oil discharged from the rod side of the opening and closing hydraulic cylinder to the rod side of the suspension hydraulic cylinder to reduce the rod of the suspension hydraulic cylinder. Submersible sand pump as described. In the submersible sand pump,
Equipped with an open / close accumulator that controls the open / close hydraulic cylinder,
The hydraulic oil in the open / close accumulator is supplied to the head side of the open / close hydraulic cylinder by storage pressure in the open / close accumulator interlocking with the fact that the submersible sand pump is bottomed in the hole bottom, and the rod is extended. By opening the on-off valve through the linked link, the injection suction pipe and the injection pipe are communicated with each other through the feed pipe, and the mud water sucked into the injection suction pipe is injected from the injection pipe into the underground hole The underwater sand pump of Claim 13. The rod of the suspension hydraulic cylinder is extended in conjunction with the underwater sand pump moving away from the hole bottom, and the hydraulic oil discharged from the rod side of the suspension hydraulic cylinder is transferred to the rod side of the opening / closing hydraulic cylinder By supplying
The opening / closing valve is closed by reducing the rod of the opening / closing hydraulic cylinder and storing the working oil on the head side of the opening / closing hydraulic cylinder in the opening / closing accumulator to stop the injection of mud water from the injection pipe. Submersible sand pump. Equipped with a vacuum accumulator that supplies hydraulic fluid to the head side of the suspension hydraulic cylinder or stores hydraulic fluid discharged from the head side,
When the submersible sand pump is placed on the bottom of the hole, the hydraulic oil discharged from the head side of the suspension hydraulic cylinder is stored in the vacuum accumulator;
The submersible sand pump according to claim 13, 14 or 15, wherein the hydraulic oil in the vacuum accumulator is supplied to the head side of the suspension hydraulic cylinder by storage pressure of the vacuum accumulator at the time of separation from the bottom of the hole of the submersible sand pump. .   The hydraulic accumulator according to claim 13, 14 or 15, further comprising a replenishment accumulator for supplying hydraulic oil for replenishment to a pipe line connecting the hydraulic oil on the rod side of the opening and closing hydraulic cylinder and the hydraulic oil on the rod side of the suspension hydraulic cylinder. The underwater sand pump of 16 statement.

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