JP5850421B2 - Drilling and turbid water accumulating device and excavation and turbid water transfer method using the same - Google Patents

Description

  The present invention relates to an apparatus and method for recovering and transferring excavation shears and muddy water discharged by excavation work using a down-the-hole hammer.

  Conventionally, large-diameter boring machines have been used for excavation processes in pier construction and the like, but in recent years, down-the-hole hammers have been used for excavation work due to an increasing demand for high-speed excavation work.

  Excavation work using such down-the-hole hammers has been carried out in new construction / maintenance / repair work of structures such as bridges in rivers, dam maintenance / repair work, and temporary construction work in mountainous areas. The pier construction method / LIBRA construction method disclosed in Japanese Patent No. 3211673 is known. In addition, excavation work using such down-the-hole hammers includes excavation using a casing disclosed in Patent Document 2 (Patent No. 3640371) and a steel pipe disclosed in Patent Document 3 (Patent No. 37098795).・ It is also implemented in steel pipe sheet pile placing work.

  On the other hand, construction by down-the-hole hammer is performed rapidly, and because the soil is discharged using the principle of air lift, a large amount of excavated shear is discharged in a short time and a large amount of muddy water is ejected by air lift during excavation. . If these excavations are left on the site or turbid water is allowed to flow down on the site, a large amount of excavation and turbid water will cause environmental pollution around the site. Patent Document 4 (Patent No. 4553629) reduces the environmental burden. It has been proposed to prevent such scattering.

Japanese Patent No. 3211673 Japanese Patent No. 3640371 Japanese Patent No. 3708895 Japanese Patent No. 4553629 Japanese Patent No. 4648998 Japanese Patent Laid-Open No. 11-350529

(Problem of technical matter disclosed in Patent Document 4)
Because construction using down-the-hole hammers has been rapidly implemented, excavation and muddy water is discharged in a large amount in a short time. There was a time when these excavated and muddy water had been left in the vicinity or were washed away, but due to the recent increase in awareness of environmental protection, it is required to restore the state before the start of construction as much as possible. Yes. Therefore, in order to restore the pre-construction state and reduce the environmental burden due to excavation and muddy water, it is necessary not only to prevent scattering but also to collect them appropriately.

However,
-A dedicated device that has been optimized to perform the process has not been proposed yet.
・ In order to allocate proximity technology as an alternative, large-scale alternative facilities and equipment are required, but it is difficult to secure an occupied space for the equipment and equipment on site.
-It is also difficult to secure workers for operating such large-scale facilities and work space for heavy machinery.
・ Furthermore, when the treatment cannot be mechanized, it is more difficult to transfer excavated soil manually.

  Therefore, in a method such as Patent Document 4 (Patent No. 4553629), excavation and scattering of muddy water are prevented, but the accumulation, transfer, and subsequent disposal as generated soil, turbidity reduction, and fresh water purification Is not feasible. Therefore, in actual construction sites, in most cases, the excavated soil, which is a natural product, is left on the ground, river bed, etc. on rivers, dams, mountain slopes, etc., and turbid water is also returned as it is after dropping. The current situation is that no special processing is performed.

(Problem of technical matter disclosed in Patent Document 5)
In order to solve the problem related to Patent Document 4, in FIGS. 11 and 12 of Patent Document 5 (Patent No. 4648998), it is proposed to transfer excavation sludge and muddy water using a slope. Specifically, as shown in FIG. 11 of the present application, a height difference is provided between the hopper 101 and the conveyor 103, and a slope 105 is provided in the transfer path in the hopper using the height difference, and excavation shear and muddy water Is configured to slide down the slope 105 of the transfer path in a gravitational manner using the energy of falling when falling into the hopper.

  However, in such a configuration, for example, when the amount of turbid water discharged is small, there is a problem that the excavation shear falling into the hopper 101 is viscous and solidified. In addition, there is an event that the fluidity of the excavation shear cannot be ensured despite the slope 105 because the excavation shears in the shape of gravel are connected and stably accumulated. In this case, despite the presence of the slope 105, the excavation slip does not slide down and stays in the hopper 101, and the hopper fills with excavation slip in an instant, leaving it to fall from the periphery of the hopper. A fatal problem of falling will occur.

  Even if there is a considerable amount of turbid water, excavation with a specific gravity higher than water and no fluidity will not have fluidity due to the action of the slope 105 or the pressure of running water. In addition, when the fine sand-like excavation begins to accumulate in the hopper 101, when the muddy water that falls intermittently passes through the accumulation portion of the fine sand-like excavation, the same consolidation effect as that of sand water tightening Will occur. As a result, there is a problem that the fluidity of the accumulated excavation is further lost and the tendency to accumulate is promoted.

  Therefore, in the method disclosed in FIG. 11 and FIG. 12 of Patent Document 5, it has been known that the excavation shear stagnating in the hopper results in malfunction, and until now, a countermeasure method having versatility has been devised. It has not been.

(Problem of technical matter disclosed in Patent Document 6)
On the other hand, in Patent Document 6 (Japanese Patent Application Laid-Open No. 11-350529), an inclined bottom plate is provided at the bottom of a container for storing excavated sludge and muddy water, and the excavated muddy water and muddy water are discharged from the container using blow air of a down-the-hole hammer. The technical matters are disclosed.

However, as described above, even if the container bottom is inclined, the fluidity of the excavation shear in the container cannot be ensured. That is, if the excavation shear in the container is stagnated or consolidated, the excavation shear in the container does not have fluidity even if blow air is applied. Therefore, similarly to the method of the above-mentioned Patent Document 5, the excavation slip stagnated in the container causes malfunction, and even if blow air is applied, the excavation slip cannot be discharged.

In Patent Document 6, all of the excavator, the container, the steel pipe, etc. are provided integrally (paragraph [0021]). That is, in Patent Document 6, in addition to the weights of the excavator and the steel pipe, the entire weight of the stacking device (container, discharge hose, connection port, slip receiving portion) is applied to the crane as a suspension load.
Therefore, in the configuration of Patent Document 6, the total weight of the excavating device, the steel pipe, the accumulating device (the container body, the discharging hose, the connection port, the slip receiving portion), and the excavating shear accumulated in the accumulating device is the suspension load. There is a problem that the load on the excavating crane becomes extremely high. Therefore, when using the technical matter of patent document 6 for excavation construction, the enlargement of a crane will be forced and the problem that a significant cost increase will arise.

(Problems still required for excavation using down-the-hole hammer)
As mentioned above, in excavation construction using down-the-hole hammers, despite the large amount of excavation and turbid water, the conventional technology cannot handle them properly, and it still causes environmental pollution. It is.

  On the other hand, the rapid destruction of the natural environment due to problems such as water sources that are used as clean water, runoff of muddy water in the habitats of rare animals and plants, neglect of excavated soil, and neglect of construction soil in afforestation areas As awareness of protection increases, it is required to restore the current state to the state before the start of construction as much as possible.

(Object of the present invention)
In view of the above-mentioned problems of the prior art, the object of the present invention is optimized to collect a large amount of excavation and turbid water generated by excavation using a down-the-hole hammer and to reliably transfer it without leaving it on site. It is to provide a dedicated apparatus and method.

  The purpose mentioned above is a container having a hole having a diameter through which a casing (a casing, a steel pipe sheet pile, a drilling casing, etc.) can be inserted in a drilling operation by a down-the-hole hammer, and having a storage part for excavation shear, This is achieved by an accumulating device provided with a stirring member so that the excavation piles accumulated on the surface can be stirred.

  The container is preferably circular.

  The stirring member rotates about the center of the container as a rotation center, and the outer end has a circular diameter substantially equal to the circular diameter formed by the inner wall of the container, and the lower end of the stirring member is the container It is preferable that it is substantially in contact with the upper surface of the bottom plate.

  Moreover, it is preferable that the lower part of the container has a pocket (slime reservoir) for retaining excavation sludge and turbid water, and a discharge hole is provided in the pocket.

  Moreover, it is preferable that the container has a discharge hole partitioned by a net-like plate that prevents passage of excavation shear and allows passage of muddy water.

  The above-mentioned object is achieved by collecting and transporting digging and turbid water by the above-described accumulating device.

  In this method, it is preferable to excavate and transfer muddy water by a vacuum vehicle.

  According to the present invention, even when a large-diameter, large-depth down-the-hole hammer is rapidly drilled in a river or a dam lake, a large amount of excavation and accumulation and transfer of muddy water can be smoothly performed, and the surrounding natural environment can be obtained. An excellent effect of being able to perform construction with consideration is achieved.

  In addition, the stacking apparatus of the present invention uses, for example, the upper construction panel of the jetty / LIBRA method disclosed in Patent Document 1 (Patent No. 3211673) or the casing disclosed in Patent Document 2 (Patent No. 3640371). Excavation work that occurs continuously during excavation by setting it on the conducting material used for the rapid construction of steel pipe and steel pipe sheet pile placing work disclosed in Patent Document 3 (Patent No. 3708955) Since muddy water can be reliably collected, excavation and muddy water can be prevented from returning to the construction site.

  In the present invention, the agitating member provided so as to freely stir the excavation pile accumulated in the container with excavation is always operated to continuously agitate the excavation ladle. As a result, the stagnation and consolidation of the excavated ladle in the container, which has been the biggest challenge when mechanizing and automating the excavated debris transfer so far, is reliably prevented. Maintained. Moreover, since the clogging or blockage of the transfer path due to stagnation or consolidation of excavation does not occur, the transfer can be carried out smoothly.

  In addition, if the container used for the stacking device is square, there is a concern that the excavation stagnation is stagnated at the corner, and stays and then sticks, but in the present invention, since the container is circular, such a concern. It is possible to collect and transfer excavated ladle without any trouble.

  The stacking apparatus of the present invention includes a rotating body whose center of rotation is the center of the circular container, and a stirring member that rotates integrally with the rotating body and substantially contacts the inside of the circular container. As a result, the excavation and muddy water accumulated in the container can be continuously stirred.

  Further, for example, in the method described in Patent Document 5 (Patent No. 4648998), the structure of sliding the slope in a gravitational manner using falling energy is adopted for excavation and transfer of muddy water. However, according to the present invention, such problems of stagnation and retention of excavation are not caused.

  Further, according to the present invention, for example, the lower part of the container has a pocket (slime reservoir) for retaining excavation shear and turbid water, and a discharge hole is provided in the pocket. Therefore, the suction force can always be exerted without any loss near the discharge hole by sucking with a vacuum vehicle, for example, while maintaining the state where the excavation and muddy water is always forcedly accumulated in the pocket by the operation of the stirring member. Smooth collection and transfer in accordance with rapid excavation work is possible.

  Further, according to the present invention, a discharge hole dedicated to muddy water is added to the container of the accumulation device. With such a configuration, in underwater excavation and the like, it is possible to secure a flow path of muddy water that is often discharged at a volume that greatly exceeds the excavated soil. As a result, it is prevented from overflowing due to the fall of excavated soil and muddy water exceeding the capacity of the container, and more stable accumulation without sediment stagnation in hoses and pipes etc. that are the flow path of muddy water. It can be transferred.

It is a top view which shows the jetty panel used by jetty construction. It is a perspective view which illustrates one process of jetty construction, Comprising: The mode that the jetty panel shown in FIG. 1 is conveyed to the design position with the crane is shown. It is a perspective view which shows the next process of FIG. 2, Comprising: The jetty panel extended in the cantilever shape is utilized for a guide, and it has shown a mode that the casing which makes a bridge pier is laid. It is a figure which shows the excavation apparatus provided with the down-the-hole hammer used for excavation construction. It is a top view which shows the excavation shear and muddy water accumulation | storage apparatus of this invention. It is a schematic sectional drawing of the excavation shear and muddy water accumulation | storage apparatus of FIG. It is a figure which shows the mode of excavation construction using the excavation shear and muddy water accumulation | storage apparatus of this invention. It is a figure which shows a mode that excavation shear and muddy water are transferred using the excavation shear and muddy water accumulation | storage device of this invention. It is sectional drawing which shows the modification of the excavation shear and muddy water accumulation | storage apparatus of this invention. It is a top view which shows the modification of the excavation shear and muddy water accumulation | storage apparatus of this invention. It is a figure which shows the mode of the conventional excavation construction.

The present invention is used in an excavation process using a down-the-hole hammer.
In the following description, pier construction is cited as an example of construction including such excavation process.

(Overview of pier construction)
First, an outline of pier construction to which the present invention can be applied will be described with reference to FIGS.
FIG. 1 is a plan view showing a pier panel 6 used in pier construction.
FIG. 2 is a perspective view illustrating one step of the pier construction, and shows a state where the pier panel 6 shown in FIG. 1 is transported to the design position by a crane.
FIG. 3 is a perspective view showing the next step of FIG. 2, and shows a state in which a pier panel 6 that is a cantilever pier is placed using a jetty panel 6 extended in a cantilever manner as a guide.

  In the pier construction, a plurality of unit-like pier panels forming one unit of the superstructure of the pier are used. The pier panel 6 shown in FIG. 1 mainly includes a main frame 61 and a guide frame 63 (casing guide frame) connected to the main frame.

  The main frame 61 has a connecting member 65 that is connected to an existing jetty panel. The guide frame 63 has a guide pipe 67 that guides the casing and keeps the vertical when it is driven, and a plate-shaped coupling metal 69 that is coupled to the next jetty panel. The guide pipe 67 has an insertion hole 68 for inserting the casing.

  When the pier is constructed using the pier panel 6 having the above-described configuration, first, as shown in FIG. 2, the pier panel 6 is lifted by a crane and transported to the extension point (the tip position of the completed pier). Subsequently, the transported pier panel 6 is connected to the existing girder (existing pier panel) on the tip side of the pier completed part, and as shown in FIG. 3, the pier panel 6 is projected from the pier completed part. Is cantilevered.

  Next, as shown in FIG. 3, the casing 7 constituting the pier is inserted into the guide pipe 67 of the extended pier panel 6 and the casing 7 is placed vertically on the ground where the pier panel is to be placed using the pier panel as a guide material. Build. Subsequently, a down-the-hole hammer 85 of the excavator 8 to be described later is inserted through the built-in casing 7. In the illustrated embodiment, a steel pipe pile is used as an example of the casing. However, pipes such as a steel pipe sheet pile and a digging casing are included in the casing to which the present invention can be applied.

  When the excavation bit of the down-the-hole hammer 85 protrudes from the tip of the casing 7, the casing 7 is driven at the same time while excavating the target ground with the down-the-hole hammer, and then the head of the installed casing is fixed to the guide pipe 67. In the example shown in the figure, every time one pier panel is extended, three casings are driven and these heads are fixed to the guide pipe 67. Through the above steps, the construction work of the upper structure and the lower structure for one unit (one pier panel) is completed.

  The pier is completed by repeating the steps described above and continuing to extend a plurality of pier panels 6.

(Drilling equipment)
Next, based on FIG. 4, the structure and effect | action of an excavation apparatus used by excavation construction in the pier construction etc. which were mentioned above are demonstrated. FIG. 4 is a view showing the excavator 8 provided with the down-the-hole hammer 85 used for excavation work.

  As shown in FIG. 4, the excavation device 8 mainly includes a rotary drive device 81 (digging machine) suspended by a crane, a substantially sleeve-shaped earth removal cap 83 fixed to a lower portion of the drive device, It has a down-the-hole hammer 85 connected to the rotary drive device 81 through the inside of the soil removal cap, and a cover 87 for preventing digging and scattering of muddy water. The excavator 8 is used for driving the casing 7 while excavating the ground.

The rotational drive device 81 rotationally drives the down-the-hole hammer 85 below it.
The down-the-hole hammer 85 has a hammer shaft 91 having a piston for generating a striking force therein. The upper end side of the hammer shaft 91 passes through the inside of a substantially sleeve-shaped earth removal cap 83 and is operably connected to the rotary drive device 81. On the other hand, an excavation bit 93 for excavating the ground is provided at the tip of the hammer shaft 91.
At the time of casting the casing, as shown in FIG. 4, the down-the-hole hammer 85 is inserted into the inner space of the casing 7, the excavation bit 93 is projected from the tip of the casing, the excavation bit is set in an expanded state, and the target ground is excavated. .

  As shown in FIG. 4, the scattering prevention cover 87 has an elastic bellows structure and is formed in a cylindrical shape. The scattering prevention cover 87 is fixed to the soil removal cap 83 so as to surround the periphery of the casing 7 to be driven. In addition to preventing excavation and splashing of muddy water, it plays a role of guiding them into a container of an accumulator described later.

  When excavation is performed using the excavator 8 having the above-described configuration, rotary excavation is performed while continuously hitting the ground to be excavated. Excavated soil (excavated soil) and turbid water generated during excavation are blown up in an air lift manner using the driving air of the down-the-hole hammer. The blown-up excavation and muddy water rides on the air flow and passes through the inner space of the casing (specifically, the earth removal path consisting of the gap between the inner wall of the casing and the outer wall of the down-the-hole hammer). It ejects from the opening.

  As shown in FIG. 4, the excavated shear and muddy water ejected from the upper part of the casing 7 are discharged to the outside through the space between the upper part of the casing and the soil removal cap 83. The excavated shear and muddy water discharged through the soil removal cap 83 pass through the gap between the outer wall of the casing 7 and the scattering prevention cover 87 and fall downward along the outer wall of the casing 7. Since the scattering prevention cover 87 surrounds the periphery of the casing 7 to be placed, the discharged excavation and muddy water is not scattered around the airflow. Therefore, by using the excavation apparatus having the above-described configuration, excavation scraps and muddy water are surely dropped into the container of the accumulation apparatus described later without being scattered.

  The down-the-hole hammer advances by excavating the target ground while discharging the excavated shear and muddy water out of the casing according to the principle described above. Therefore, if the ground is excavated with the down-the-hole hammer inserted into the casing, the casing follows the down-the-hole hammer, so that the casing is driven simultaneously with the excavation.

(Drilling and turbid water accumulator)
Next, based on FIGS. 5-7, the structure of the excavation shear and muddy water accumulation | storage apparatus (slime collection | recovery apparatus) which concerns on this invention is demonstrated.
FIG. 5 is a plan view showing the excavation shear / turbid water accumulating apparatus 1 according to the present invention.
6 is a schematic cross-sectional view of the excavation shear / turbid water accumulating apparatus of FIG.
FIG. 7 is a diagram showing a state of excavation work using the excavation shear / turbid water accumulating apparatus 1 of the present invention.
Hereinafter, the excavation shear / turbid water accumulating device is abbreviated as “accumulation device”, and the mixture of excavation shear and muddy water is referred to as “slime” as necessary.

  The stacking apparatus 1 according to the present invention mainly includes an insertion hole 11 through which a casing to be driven can be inserted, a circular container 13 provided so as to surround the insertion hole, and a slime discharged from the container. It has a pocket 17 (slime reservoir) to be kept, and a discharge pipe 19 for discharging the slime in the pocket to the external tank. Furthermore, the stacking apparatus 1 of the present invention is provided with stagnation prevention means for preventing stagnation of excavation shear in the container 13. Details of the stagnation prevention means will be described later.

  The circular container 13 is mainly provided at a bottom plate 21 (bottom portion) whose center portion is hollowed out, a tubular inner wall 22 (wall body) provided at a circular inner edge portion of the bottom plate, and a circular outer edge portion of the bottom plate. And an annular outer wall 23 (wall body). The inner wall 22 and the outer wall 23 are provided so as to form concentric circles in plan view. An accumulation space 24 is formed inside the container 13 for accommodating slime that has fallen from above through the anti-scattering cover.

As shown in FIGS. 5 and 6, the bottom plate 21 has a discharge hole 26 for discharging the slime in the accumulation space 24.
The inner wall 22 has the insertion hole 11 on the inner side. This inner wall also functions as a casing guide in excavation work.
The outer wall 23 is provided so as to surround the storage space 24 while being inclined outward.

  A pocket 17 is provided below the discharge hole 26 of the bottom plate 21, and slime that freely falls through the discharge hole 26 of the bottom plate is temporarily stored in the pocket. Further, the pocket 17 is provided with a discharge hole for discharging the slime stored therein, and a slime discharge pipe 19 is connected to the discharge hole. The slime discharge pipe 19 is connected to a tank of a vacuum vehicle, for example.

  The dynamic stagnation prevention means mainly includes a ring gear 31 (rotary body) having a diameter substantially equal to the inner diameter on the upper side of the outer wall 23, a ring gear fixture 33 for rotatably supporting the ring gear 31, and a ring. A stirring member 35 (slime stirring plate) that rotates integrally with the gear 31 to stir the excavated shear in the accumulation space 24 and a motor 37 that rotates the ring gear 31 are provided.

  The stagnation prevention means provided in the present invention can be said to be “dynamic means” because the tangible stirring member 35 moves around in the container 13 to prevent stagnation of excavation shear and promote flow. On the other hand, since the hopper disclosed in FIG. 9 and FIG. 10 of Patent Document 5 (Patent No. 4648998) attempts to flow the excavation shear by a stationary bottom plate (slope) that does not operate, “static means” It can be said.

  The annular ring gear fixture 33 in plan view is fixed to the upper end of the outer wall 23 and has a substantially U-shaped cross-sectional shape as shown on the left side of FIG. The ring gear fixture 33 has a guide groove 34 that rotatably accommodates the gear portion 39 of the ring gear 31.

The ring gear 31 is provided so that the center of the circular container 13 is the center of rotation. The ring gear 31 includes a ring portion 38 that holds the stirring member 35 in an upright state, and a gear portion 39 that projects in a flange shape on the outer wall side of the ring portion.
The ring portion 38 is positioned in contact with the upper inner wall surface of the outer wall 23 so as to function as a wall body in cooperation with the outer wall 23.
The flange-shaped gear portion 39 is supported by the ring gear fixture 33 in a state of being rotatably accommodated in the guide groove 34 and meshed with the gear 36 of the motor shaft.

  The stirring members 35 are plate-like members provided so as to partition the storage space 24 in the container, and in this embodiment, four stirring members 35 are provided at regular intervals. Each stirring member 35 is provided so as to substantially contact the upper surface of the bottom plate 21, the outer wall surface of the inner wall 22, and the inner wall surface of the outer wall 23, and is fixed to the inner wall of the ring gear 31. In the present embodiment, the stirring member 35 is provided so as to be inscribed in the inner surface of the container to such an extent that the rotation of the stirring member 35 is not hindered. May be.

(Slime transfer method using an accumulator)
Next, a slime transfer method using the stacking apparatus 1 having the above configuration will be described.

  In using the stacking apparatus 1 in the pier construction shown in FIGS. 2 and 3, first, the stacking apparatus 1 is fixed on a guide pipe 67 that is directly above the position where the casing is to be cast as shown in FIG. 7. At that time, the guide pipe 67 of the jetty panel 6 and the inner wall 22 of the stacking device 1 are positioned so as to be concentric when viewed from above. Thereby, since the insertion hole 68 of the guide pipe 67 and the insertion hole 11 of the stacking device 1 face each other concentrically, the casing 4 passing through both can be maintained vertically.

  When the stacking device 1 is fixed on the guide pipe 67, the slime discharge pipe 19 leading to the pocket 17 is connected to the tank of the vacuum wheel 53 via the suction hose 51 as shown in FIG. When starting to place the casing 7, the motor 37 of the stacking device 1 is operated to continuously rotate the stirring member 35, and at the same time, the suction device of the vacuum wheel 53 is operated.

  In the excavation process, as shown in FIG. 7, excavation and driving are simultaneously performed using the excavator 8 through the casing 7 through the insertion hole 11 of the stacking device 1 and the insertion hole 68 of the guide pipe 67. The excavation scrap cut out in the excavation process is blown up together with muddy water through the gap between the down-the-hole hammer 85 and the casing 7 by the air lift effect as indicated by arrows in FIG. The slime discharged from the upper part of the casing 7 hits the soil removal cap 83 and changes its direction in the falling direction, and then falls due to its own weight. Since the periphery of the casing 7 is surrounded by the scattering prevention cover 87, the slime does not scatter around and is guided to the lower stacking device 1 along the outer periphery of the casing.

  In the rapid construction using the down-the-hole hammer 85, a large amount of slime is blown up in a short time, and they fall around the casing 7 and accumulate in the container 13 as they are. Therefore, at this time, the load of the accumulated slime and the load of the accumulator are supported not by the crane but by the pier side.

  On the other hand, since the stirring member 35 continues to operate in the container 13 of the stacking apparatus, the excavation shear in the container does not stagnate and solidify. The slime accumulated in the container 13 is disturbed by the stirring member 35 that keeps rotating, and is guided to the discharge hole 26 of the bottom plate 21. When the stirring member 35 passes over the discharge hole 26, the slime is caused by its own weight. It falls and is stored in the pocket 17.

  Depending on the suction state, the pocket 17 may be temporarily filled with slime, and the slime may not fall from the discharge hole 26. However, even in that case, the stirring member 35 is continuously operated. No excavation splinter waiting in 13 will stagnate or consolidate. Then, the excavation shears waiting in the container are urged to flow together with muddy water by the stirring member 35 and guided to the discharge hole 26, and eventually fall from the discharge hole 26 as the suction and stirring progress.

  Due to the operation of the stirring member 35 described above, a large amount of slime flows into the pocket 17 below the discharge hole 26 of the bottom plate 21 one after another. The slime discharge pipe 19 connected to the pocket 17 is connected to the tank of the vacuum wheel 53 via a suction hose 51 as shown in FIG. Therefore, the slime that has fallen through the discharge hole 26 is quickly sucked out when accommodated in the pocket 17 and is quickly transferred to the tank of the vacuum wheel 53 through the suction hose 51.

  The slime transferred to the tank of the vacuum car 53 is transported to the treatment facility by the vacuum car, and is subjected to soil removal treatment and muddy water treatment.

(Other embodiments and modifications)
The above-described embodiment is an exemplification, and various modifications can be employed within the scope of the claims.

  For example, the aspect of the stirring member 35 is not limited to a plate-like member as shown in FIG. 6, and may be constituted by a comb-like member as shown in FIG. 9. Or you may comprise from a rod-shaped member. Moreover, you may make it provide several types of stirring member from which a form differs in a container. In addition, any movable tangible object that prevents stagnation and consolidation of excavation in the container can be adopted, and it is more preferable to promote flow to the discharge hole.

  Further, the bottom plate 21 of the container 13 is not limited to the horizontal plate as shown in FIG. 6, and the upper surface of the bottom plate may be inclined so that the slime can easily flow toward the discharge hole 26.

  In addition, the pier construction as described above often constructs a pier across the upper surface of a river or the like. In such construction, a large amount of turbid water pours into the container in a short time, and if there is only one discharge system, the slime (especially turbid water) cannot be transferred in time, and the turbid water may overflow from the container due to malfunction. Therefore, as shown in FIG. 10, one or more discharge holes 41 dedicated to muddy water may be added in addition to the discharge holes 26 that can discharge excavation mixed with muddy water. Further, a mesh 43 may be provided in the muddy water discharge hole 41 so as to allow the muddy water to pass but prevent the excavation from passing. Further, the slime discharge hole and the muddy water discharge hole may be connected to the same tank, or may be connected to separate tanks.

  Moreover, although embodiment mentioned above demonstrated the usage example in the field where muddy water generate | occur | produces, this invention can also be used by the excavation construction which muddy water does not produce. That is, the present invention is mainly used for accumulation and transfer of excavation shear, and is used for accumulation and transfer of excavation shear and muddy water at a site where muddy water is discharged during excavation.

  Moreover, the casing used in excavation construction is not limited to the steel pipe pile used in the pier construction shown in FIGS. 2 and 3, and may be pipes such as a steel pipe sheet pile or excavation casing.

(Industrial applicability)
Excavation construction to which the integrated device of the present invention can be applied is not limited to jetty construction as shown in FIGS. 2 and 3, but excavation construction using the casing disclosed in Patent Document 2 (Patent No. 3640371), The present invention can also be applied to the steel pipe / steel pipe sheet pile placing work disclosed in Patent Document 3 (Japanese Patent No. 3708955).

DESCRIPTION OF SYMBOLS 1 Excavation / turbid water accumulation apparatus 6 Pier panel 7 Casing 8 Excavation apparatus 11 Insertion hole 13 Circular container 17 Pocket (slime reservoir)
19 Slime discharge pipe 21 Bottom plate (bottom)
22 Inner wall (inner wall)
23 Outer wall (outer wall)
24 storage space 26 discharge hole 31 ring gear (rotating body)
33 Ring gear fixture 34 Guide groove 35 Stirring member (slime stirring plate)
36 Motor shaft gear 37 Motor 38 Ring part 39 Gear part 41 Muddy water discharge hole 43 Mesh 51 Suction hose 53 Vacuum wheel 61 Main frame 63 Guide frame (casing guide frame)
65 Connecting member 67 Guide pipe 68 Insertion hole 69 Connecting bracket 81 Rotation drive device (digging machine)
83 Discharge cap 85 Down-the-hole hammer 87 Anti-scattering cover 91 Hammer shaft 93 Excavation bit 101 Hopper 103 Conveyor 105 Slope

Claims (7)

An apparatus used in excavation using a down-the-hole hammer, in which at least excavation shear is accumulated, and when muddy water is discharged, the muddy water is also accumulated.
An insertion hole through which the casing following the down-the-hole hammer can be inserted;
A container that is provided so as to surround the insertion hole, and temporarily accumulates excavation shear;
And disturb drilling shear by moving around in the vessel, possess a dynamic stagnation preventing means for preventing stagnation and consolidation of該掘cutting shear, and
The stagnation prevention means includes a rotating body, and a stirring member provided so as to rotate integrally with the rotating body and substantially contact the inside of the container .   2. The excavating and muddy water collecting apparatus according to claim 1, wherein the container is circular. The stagnation prevention means includes
A rotating body whose center of rotation is the center of the circular container;
The excavation shear / turbid water accumulating device according to claim 2, further comprising: a stirring member that rotates integrally with the rotating body and is substantially in contact with the inside of the circular container. A discharge hole for discharging excavation shear from the vessel;
A pocket for temporarily storing excavation shear discharged through the discharge hole;
A discharge hole for discharging excavation shear from the pocket;
The excavation / turbid water accumulating apparatus according to claim 1, further comprising:   5. The excavation shear / turbid water accumulating apparatus according to claim 4, wherein the container further has a discharge hole for muddy water. In the method of transferring at least excavation shear in excavation using down-the-hole hammer, and also transferring the muddy water when muddy water is discharged,
The excavation shear / turbid water transfer method characterized in that excavation shear or excavation shear generated by excavation and muddy water are accumulated and transferred to the accumulating device according to any one of claims 1 to 5.   7. The excavation shear / turbid water transfer method according to claim 6, wherein the excavation shear or excavation shear and muddy water accumulated in the accumulating device are sucked and transferred to a vacuum vehicle.