JP3066121U - Caser and pile presser - Google Patents

Abstract

(57) [Summary] [PROBLEMS] The object of the present invention is to press-fit a pile using a pile press-fitting machine with a casing auger, and when the casing is pulled out after the press-fitting work, the height of the upper part of the casing that has been raised by pulling out is increased. To provide a casing auger and a pile press-in machine in which earth and sand do not fall or scatter from the earth opening. A casing auger (17) including a cylindrical casing (170) and a screw auger (173) arranged in the casing (170). Are formed side by side and the casing 1 above the ground
A vertically extendable cover 30 is provided so as to cover at least a portion of the discharge port 175 around 70 without closing the discharge ports 175.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a casing auger and a pile press machine.

[0002]

[Prior art]

 In general, a pile press-in / pull-out machine is known which takes a reaction force from an existing pile (for example, including a sheet pile such as a steel sheet pile) and press-fits a new pile (including the above-described pile), or pulls out an existing pile. Have been. Furthermore, on hard ground where it is difficult to press-fit the sheet piles only with hydraulic pressure, such as when the pile into which the pile is driven contains a large amount of gravel, etc. There is known a pile presser with a casing auger that uses an auger (hereinafter referred to as a casing auger) and presses a pile while first digging with an earth auger in a casing. When the pile is pressed into the ground using such a pile auger with a casing auger, the soil discharge generated by the casing auger is provided at the top end of the casing of the casing auger, and discharged from this discharge port. I was trying. At this time, attach a chute to the above-mentioned discharge port and receive it with a hopper so that the earth and sand do not scatter from the discharge port at the upper end of the casing at a high position, or discharge the soil to the discharge port. A hose was attached to guide the earth discharging downward so that earth and sand could be discharged near the ground. However, such a configuration not only requires a great deal of effort to suspend the hopper and install a discharging hose, but also causes the ground auger to always lift the discharging to the upper end of the casing. Extra energy is required for the earth auger.

[0003] To cope with these problems, a plurality of discharge ports are arranged vertically on the casing, and when the casing auger is lowered to excavate the ground, the first of the discharge ports exposed from the ground is removed. Some excavated soil is discharged from the lower discharge port. With such a configuration, it is not necessary to provide the above-mentioned hopper and chute and the above-mentioned discharging hose, and the pile can be discharged from the vicinity of the ground at all times during the press-fitting.

[0004]

[Problems to be solved by the invention]

 However, as described above, in the configuration in which a plurality of discharge ports are provided in the casing of the casing auger to discharge the soil during the press-fitting of the pile, when the casing auger is pulled out after the press-fitting of the pile, the sediment accumulated in the casing is reduced. There was a possibility that it would fall or scatter from the discharge port at the top of the casing auger, which was raised by pulling it out. Therefore, the purpose of the present invention is, for example, to insert piles using a pile auger with a casing auger, and when pulling out the casing after the press-fitting operation, pull out and pull out the soil from the discharge port at the top of the casing that has been raised. Is to provide a casing auger and a pile press-in machine that do not fall or scatter.

[0005]

[Means for Solving the Problems]

 In order to solve the above problem, the invention according to claim 1 is a casing auger provided with a cylindrical casing and a screw auger arranged in the casing, wherein the casing has a vertical shape. And a vertically extensible cover that covers at least a portion of the discharge port around the casing above the ground without closing the discharge port. Is provided. According to the above configuration, by providing a plurality of discharging ports arranged vertically on the casing, it is possible to discharge the soil from the lowest lower discharging port among the discharging ports exposed on the ground of the casing. At the same time, when the casing is pulled out or after the casing is pulled out, the sediment accumulated in the casing can be prevented from being scattered from the discharging port at the upper part of the raised casing by pulling out. In addition, since the cover is vertically extensible, even if the height of the casing auger exposed above the ground changes due to excavation by the casing auger or withdrawal of the casing auger, the casing auger follows. Can cover the discharge port above the chuck of the press-fitting machine.

According to a second aspect of the present invention, in the casing auger according to the first aspect, the cover is arranged so that a portion of the periphery of the casing that is substantially semicircular on the side where the discharge port is provided is vertically arranged. It is characterized in that the cross section is substantially semicircular so as to cover over. When the casing auger is applied to the pile press-fitting by the pile presser, the pile is pressed in while the casing auger is close to the pile and excavated by the casing auger. In this case, the pile and the casing are almost adjacent to each other, so that the pile is in the way and the entire periphery of the casing cannot be covered with the cover. In other words, if the entire periphery of the casing is covered with a cover, the pile cannot be placed almost adjacent to the casing auger. However, according to the above configuration, the cover is formed in a semi-circular shape, and covers only the portion of the casing where the discharge port is provided, so that the casing auger and the pile can be arranged adjacent to each other, When the casing auger is pulled out, it is possible to prevent the earth and sand from scattering from the discharge port of the casing.

According to a third aspect of the present invention, in the casing auger according to the first or second aspect, the cover is formed in a bellows shape so as to be vertically expandable and contractible. According to this configuration, since the cover has a bellows shape, the cover can be expanded and contracted over a long distance more easily than when the cover is expanded and contracted by elastic deformation or the like. According to a fourth aspect of the present invention, in the casing auger according to any one of the first to third aspects, the cover includes at least two divided parts, an upper part and a lower part. It is characterized by being freely connected. According to the above configuration, since the cover is configured by vertically connecting divided bodies divided vertically, even if the cover is long and elastic, it is possible to divide the cover by dividing it. It can be easily handled when removing the cover, transporting the cover, storing the cover, or attaching the cover.

According to a fifth aspect of the present invention, there is provided the casing auger according to any one of the first to fourth aspects, wherein the casing is provided with protrusions extending vertically in the left and right directions with the discharge opening interposed therebetween. The cover is provided with a plurality of substantially semicircular holders which are arranged above and below the cover and maintain the shape of the cover while keeping an interval from the casing. The left and right ends of at least a part of the holder are vertically movably fitted to the ridges of the casing. According to the above configuration, the cover can hold the gap from the casing and maintain its own shape by the holding tool, so that the cover around the discharge port can be easily covered without closing the discharge port. It is possible to maintain a space between the cover and the casing for dropping the earth. Also, ridges are provided on the left and right sides of the discharge opening of the casing, and the left and right ends of at least some of the holders are fitted to the ridges so as to be vertically movable. In addition, the casing can be easily expanded and contracted along the position of the discharge opening.

According to a sixth aspect of the present invention, there is provided a casing auger according to any one of the first to fifth aspects, a pile auger main body for supporting the casing auger up and down, and press-fitting a pile. The casing auger is disposed at a position close to a pile to be press-fitted, the pile press-fitting machine body being held up and down freely, and excavating the ground with the casing auger. It is characterized by press-fitting. According to the above configuration, in the press-fitting / pulling-out machine provided with the casing auger, the same effects as those of the above-described configurations can be obtained. The invention according to claim 7 is the pile press-in machine according to claim 6, wherein an upper end of the cover is attached to an upper end of the casing, and a lower end of the cover includes the casing auger. It is characterized by being attached to. According to the above configuration, the casing auger moves downward during excavation, and is pulled out after the excavation is completed, and moves upward. At this time, the upper end of the telescopic cover is attached to the casing auger. Since the cover is attached to the upper end and the lower end of the cover is attached to the pile press-fitting machine to which the casing auger is attached, the cover can be extended and retracted as the casing auger moves up and down as described above. Of the portion where the discharge port is provided, the portion exposed above the ground can always be covered.

[0010] The invention according to claim 8 is a pile press-fitting machine comprising the casing auger according to claim 5 and a pile press-fitting machine body that supports the casing auger so as to be vertically movable and press-fits a pile. The casing auger is moved up and down in a state where the pile press-fitting machine body detachably grips the protrusion of the casing auger. According to the above configuration, since the casing is provided with a ridge and is gripped, unlike a conventional pile press-in and pull-out machine which moves up and down while holding the casing auger, it has multiple discharge ports. In the provided casing auger, the portion of the casing auger where the above-described discharge port is formed is not strongly grasped, and the casing is not deformed. In the configuration according to the fifth aspect, if this ridge is used as a guide member for fitting the holding tool so as to be vertically movable as described above, it is not necessary to form a new ridge. Item 5 can be realized without increasing the cost.

[0011]

[Embodiment of the invention]

 Hereinafter, an embodiment of a casing auger and a pile presser according to the present invention will be described with reference to FIGS. FIGS. 1 to 4 show the pile press-in machine 1 of this example, and FIG. 5 shows a plan view of the chuck portion 16 of the pile press-in press 1. In addition, the cover (described later) shown in FIGS. 1 to 4 shows only the lower end of the cover when an elevating unit described later is raised, and FIGS. 1, 2 and 4 show the cover. The upper end extends to the upper end of the casing. 6 is a front view of a cover provided in a casing auger of the pile press-fitting machine 1, FIG. 7 is a plan view of a backing plate, and FIG. 8 is a plan view of a holder included in the cover. is there. As shown in FIGS. 1 to 6, the pile press-in machine 1 includes a saddle 12 having a clamp 11 for grasping an existing U-shaped steel sheet pile 2. A sliding base 13 that slides back and forth with respect to 12; a turning part 14 that turns on the slide base 13; a turning part that rotates about the turning part 14; and a hydraulic cylinder that can move up and down in front of the turning part 14. A lifting and lowering section 15, a chuck section 16 provided in the lifting and lowering section 15 and rotatable with respect to the lifting and lowering section 15, an earth auger (hereinafter referred to as a casing auger) 17 having a casing for excavation, And a reel 19 on which a hose (not shown) for supplying hydraulic pressure to a hydraulic motor 18 of the casing auger 17 is wound up. As is well known, the pile press-in machine 1 grips the already driven steel sheet piles 2 with the clamps 11 and removes the reaction force from the existing steel sheet piles 2. Is pressed into the ground by lowering the ground. In addition, when the steel sheet piles 2 are continuously pressed, it is possible to move on the existing pile.

The chuck portion 16 is fitted to the front surface of the revolving portion 14 so as to be movable up and down, and is attached to a hydraulic cylinder (not shown) to be driven up and down to move up and down. ing. As shown in FIG. 5, the chuck 16 grips the conventional steel sheet pile 2 and the cylindrical casing 170 of the casing auger 17. That is, the chuck portion 16 allows the casing 170 of the casing auger 17 and the steel sheet pile 2 along the casing 170 to be inserted vertically.

The chuck portion 16 has two projecting ridges 171 and 171 (projecting portions) provided on the left and right sides of the side surface (outer peripheral surface) opposite to the side surface of the casing 170 along the steel sheet pile 2. Is provided. The casing chuck 161 is provided so as to be able to move up and down with respect to the chuck portion 16, and as shown in FIG. 5, the casing chuck 161 is in contact with two side ridges 171 of the casing 170 on the side of the steel sheet pile 2. The contact parts 161a, 161a and a hydraulic cylinder (not shown) for pressing the side surface of the ridges 171, 171 on the opposite side of the steel sheet pile 2 toward the contact parts 161a, 161a are provided. , 161a and the hydraulic cylinder sandwich the ridges 171 of the casing 170. That is, the casing 170 is gripped by the casing chuck 16a of the chuck portion 16 on the side surface opposite to the side surface along the steel sheet pile 2, and between the casing 170 and the steel sheet pile 2 to be press-fitted. The members related to holding the casing 170 are not arranged.

Further, in the chuck section 16, the steel sheet pile 2 is arranged on the opposite side of the casing chuck 161 of the casing 170 gripped by the casing chuck 161, and the casing 170 is substantially inserted into the recess of the steel sheet pile 2. The steel sheet pile 2 is arranged along the casing 170 so that the steel sheet pile is half inserted, and the pile chucks 162 and 162 for gripping the steel sheet pile are provided. The casing auger 17 is provided with a cylindrical casing 170, and a screw rod 173 having a bit at the tip and a screw spirally provided vertically along the outer periphery in the casing 170. , And rotatably provided by the hydraulic motor 18.

The casing 170 is provided with a plurality of discharging ports 175... For discharging excavated earth and sand, which are communicated with the inside at the outer peripheral portion on the opposite side of the steel sheet pile, and are formed vertically. As shown in FIG. 5, two projecting ridges 171 are formed on the left and right sides of the discharge port 175. The ridges 171 and 171 are fixed to the casing chuck 161 as described above, and are also fixed to the casing chuck 161 to prevent rotation of the casing 170 during excavation of the casing auger 17. Is what you do. Further, the chuck portion 16 is provided with a discharging hole 163 on the side of the discharging port 175 so that the earth and sand discharged from the discharging port 175 can be effectively dropped on the ground.

The casing 170 has a vertically extending and retractable portion which covers the discharging port 175 of the casing 170 on the ground so as to surround the discharging port 175 vertically without closing the discharging port 175. Cover 30 is provided. The cover 30 has a semi-circular cross section and is formed in a bellows shape in the direction of expansion and contraction so as to be vertically expandable and contractible. A substantially semicircular holding member (only holding member 32 described later is shown) for holding the shape of the cover main body 31 and both ends 32a, 32a of the holding member are formed in the casing. A casing holder 32 is fitted to the protrusion 171 so as to be vertically movable. Note that the holder other than the casing holder 32 has substantially the same configuration as the holder 32, except that the ends thereof are not provided with portions that fit into the ridges.

The cover 30 according to the present embodiment is composed of two divided bodies, an upper cover 30A and a lower cover 30B. Each of the upper cover 30A and the lower cover 30B is provided with a holder 32. At both ends of the upper cover 30A and the lower cover 30B, a substantially semicircle holding the shape of the covers 30A and 30B is provided. An arcuate backing plate portion 33 is provided. By joining the contact plates 33 together, the lower end 30Ab (contact plate 33) of the upper cover 30A and the upper end 30Ba (contact plate 33) of the lower cover 30B are connected. Note that, as shown in FIG. 7, the backing plate portion 33 has a flange-like shape. The cover 30 has an upper end 30a (an upper end 30Aa of the upper cover 30A (the contact plate 33)) attached to an upper end 170a of the casing 170, and a lower end 30b (a lower end 30Bb of the lower cover 30B). The plate part 33)) is attached to the upper part of the chuck part 16. The cover 30 having the above-described structure is configured such that when the casing auger 17 digs downward, the cover 30 shrinks and the casing auger 17 is pulled out, that is, as the casing 170 extends to a position higher than the ground, 30 is extended. In addition, by connecting a plurality of similarly shaped covers between the upper cover 30A and the lower cover 30B, it is possible to easily provide a cover corresponding to a long casing.

Next, a method of forming a sheet pile wall by press-fitting the steel sheet pile 2 into the ground by the above-described pile press-in machine 1 will be described. First, in the pile press-in machine 1, the casing 170 of the casing auger 17 is gripped by the casing chuck 161 in the chuck portion 16, as shown in FIG. State. At this time, since the upper end of the bellows-shaped cover 30 is attached to the upper end of the casing 170 exposed from the ground, and the lower end is attached to the chuck portion 16, the cover 30 is extended, Covers the discharge ports 175.

Then, in order to press-fit the steel sheet pile 2, the casing auger 17 for excavating the ground moves downward. At this time, the steel sheet pile 2 is press-fitted while being excavated by the casing auger 17, or the casing chuck 161 is moved with respect to the chuck portion 16, so that the casing auger 17 is first lowered to perform a moat. When the casing auger 17 is moved upward, a process such as press-fitting the steel sheet pile 2 is performed, and the steel sheet pile 2 is press-fitted. When the ground is excavated in accordance with the press-fitting of the steel sheet pile in this way, the position of the casing auger 17 is lowered, but the cover 30 is also shrunk correspondingly. The earth discharging at this time is discharged from the earth discharging port near the ground (see FIG. 2). By repeatedly performing such an operation, the steel sheet pile 2 is pressed into the casing auger 17 while being firstly dug, and finally the steel sheet pile 2 is pressed into a predetermined depth. Then, as shown in FIG. 3, the excavated casing auger 17 is moved upward, and at the same time, the steel sheet pile 2 is press-fitted, and the press-fitting operation of the steel sheet pile 2 is completed. At this time, the cover 30 is in a contracted state.

Then, as shown in FIG. 4, after the press work of the steel sheet pile 2 is completed, the casing auger 17 is pulled out. At this time, that is, when the casing auger 17 is pulled out, the discharging port 175 of the casing 170 is also positioned above, but the cover 30 extends in the up-down direction and the casing 170 positioned above the lower end 30b. Are always covered. Therefore, by providing a plurality of discharging ports 175 vertically arranged on the casing 170 in this way, the bottom 170 of the discharging ports 175 exposed on the ground of the casing 170 can discharge the soil. Therefore, the soil can be easily discharged near the ground. Then, when the casing 170 is pulled out or after the casing 170 is pulled out, the sediment accumulated in the casing 170 is prevented from being scattered from the raised discharge port 175. Can be done. Further, since the cover 30 is vertically expandable and contractible, even if the vertical height of the portion of the casing auger exposed above the ground changes due to excavation by the casing auger 17 or pulling out of the casing auger 17, it follows the change. Of the casing auger 17 exposed above the ground can be covered. In the above embodiment, the pile is made of steel sheet pile.However, the present invention is not limited to this, and any pile can be used as long as it is pressed into the ground using a casing auger. You may.

[0021]

[Effect of the invention]

 As described above, according to the casing auger according to the first aspect of the present invention, when the casing having a plurality of discharging ports arranged vertically is pulled out, the height of the casing raised by pulling out the sediment accumulated in the casing. It can be prevented from scattering from the discharge port at the top of the building. In addition, since the cover is able to expand and contract vertically, even if the vertical height of the casing auger exposed above the ground changes due to excavation by the casing auger or withdrawal of the casing auger, the casing auger follows. Of the part exposed on the ground can be covered.

[Brief description of the drawings]

FIG. 1 is a diagram showing a pile press-in machine 1 at the start of press-fitting as an example to which the present invention is applied.

FIG. 2 is a diagram showing a pile press-in machine 1 at the time of press-fitting as an example to which the present invention is applied.

FIG. 3 is a diagram showing the pile press-in machine 1 at the time of completion of press-fitting as an example to which the present invention is applied.

FIG. 4 is a diagram showing the pile press-in machine 1 when the casing auger is pulled out as an example to which the present invention is applied.

FIG. 5 is a plan view showing an elevating part of the pile press-in machine 1.

FIG. 6 is a front view of a cover provided on a casing auger of the pile press-fitting machine 1.

FIG. 7 is a plan view of the backing plate.

FIG. 8 is a plan view of a holder provided in the cover.

[Explanation of symbols]

Reference Signs List 1 pile press-in machine 2 steel sheet pile (pile) 16 chuck 17 earth auger with casing (casing auger) 30 cover 30a upper end of cover 30b lower end of cover 30A upper cover 30B lower cover 31 cover body 32 casing holder (holding) 32a Both ends 161 Casing chuck 162 Pile chuck 170 Casing 170a Upper end 171 Ridge 175 Discharge port

Claims (8)

[Utility model registration claims] 1. A casing auger comprising: a cylindrical casing; and a screw auger disposed in the casing, wherein the casing has a plurality of discharge ports formed in a row along a vertical direction. And a casing which is provided with a vertically expandable and contractable cover that covers at least a portion of the discharge port around the casing above the ground without closing the discharge port. Ogre. 2. The casing auger according to claim 1, wherein the cover covers a substantially semicircular portion of the periphery of the casing on a side where the discharge port is provided, so that the cover covers up and down. A casing auger characterized by having a substantially semicircular shape. 3. The casing auger according to claim 1, wherein the cover is formed in a bellows shape so as to be vertically expandable and contractible. 4. The casing auger according to claim 1, wherein the cover comprises at least two divided parts, an upper part and a lower part, and these divided parts are vertically detachably connected. A casing auger characterized by that. 5. The casing auger according to any one of claims 1 to 4, wherein the casing is provided with ridges extending in a vertical direction on each of the left and right sides with respect to the discharge opening. A plurality of substantially semi-circular holders that keep the shape of the cover while keeping a distance from the casing are provided vertically, and left and right ends of at least some of the holders among the holders A casing auger characterized in that a portion is vertically movably fitted to the ridge of the casing. 6. A pile press-fitting machine comprising: the casing auger according to claim 1; and a pile press-fitting machine body for press-fitting a pile while supporting the casing auger vertically. Wherein the casing auger is arranged at a position close to a pile to be press-fitted, the pile presser body being held vertically movable, and press-fitting the pile while excavating the ground with the casing auger. Pile press machine. 7. The pile press-in machine according to claim 6, wherein an upper end of the cover is attached to an upper end of the casing, and a lower end of the cover is attached to a pile press-in machine having the casing auger. A pile press machine. 8. A pile press-fitting machine comprising: the casing auger according to claim 5; and a pile press-fitting machine main body that supports the casing auger so as to be vertically movable and press-fits a pile. A pile press-in machine characterized in that the casing auger is moved up and down in a state where the main body detachably holds the ridge of the casing auger.