JPH0632975Y2 - Punching and piercing machine for punching underground obstacles such as hardening boards - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a surface solidifying board that is an obstacle to the construction of ground improvement work by, for example, the packed drain construction method, the sand drain construction method, or the paper drain construction method. Or, it is a water granulator using slag cement, and further relates to a punching and crushing hole punching machine that removes solid obstacles such as concrete lumps, cobblestones, and buried reinforcing bars buried underground. .

(Prior art) For example, when performing ground improvement work by the sand drain method, the standard method is to first place a hollow steel pipe mandrel on the ground to be improved with a drop hammer, air hammer, or vibration hammer. . Then, sand is put in it and the mandrel is pulled out while pressing it with air, or by pulling out while vibrating the mandrel, it is common to form a sand column on the ground to be improved and construct it. is there.

(Problems to be solved by the device) However, because the surface layer of the ground to be improved has been subjected to surface layer treatment with a solidifying plate using slag concrete (mineral cement), or it is a landfill site When concrete lumps, cobblestones, buried reinforcing bars, etc. are buried, it is difficult to drive the mandrel due to the surface treatment material or buried material, and the ground improvement work should be promoted smoothly. There was an inconvenience that I could not do it.

Therefore, when such an inconvenience occurs, conventionally, a punching machine such as a screw auger is used to preliminarily form a guide hole in advance so as to eliminate the inconvenience.

However, depending on the type of the buried object, it may be difficult to penetrate the screw auger itself, and at present, there is no suitable technique for dealing with such a case. By the way, when the surface layer is treated with a hard concrete floor or slag concrete, etc., the surface layer is so hard that it takes a long time for drilling work, which causes a decrease in work efficiency of the ground improvement work itself.

Therefore, the development of a technique for dealing with such a hardened disc and a ground including an obstacle in the ground has become a present-day technical issue for smoothly and efficiently proceeding with the ground improvement work.

This invention eliminates these solidified boards and buried objects in the ground where cobblestones such as solidified boards, concrete blocks, etc. The present invention was devised for the purpose of providing a punching and crushing drilling machine for drilling drilling holes for ground improvement work.

(Means for Solving the Problem) By the way, in order to achieve the above-mentioned object, the feature of the means taken by the present invention is that a conical punching blade portion is provided in the center of the lower surface, and the conical punching blade portion A punching crushing blade with a special shape is formed by radially projecting multiple impact blades from the upper center, and this punching crushing blade is integrally equipped at the lower end of the casing pipe. A plurality of pipes are detachably attached to a suspension frame equipped with a vibration hammer and are attached to a leader such as a pile driver, and a plurality of casing pipes are simultaneously driven into the ground to be improved by the vibration hammer, and a solidified surface layer This is due to the construction of a punching and crushing hole machine that eliminates buried objects such as concrete lumps, cobblestones, and reinforcing bars in the ground to form a hole for ground improvement work.

(Operation) As described above, the punching and crushing hole punching machine according to the present invention has a conical punching blade portion in the center of the lower surface, and a plurality of impact blades are radially provided from the upper center of the conical punching blade portion. A crushing blade with a special shape that is overhanging is installed at the lower end of the casing pipe, and this is configured to be hammered in simultaneously by a vibrating hammer, so the following action is achieved.

That is, even if the surface layer of the ground to be subjected to ground improvement work is surface-treated with a solidifying plate such as a concrete structure, the punching crushing blade has a conical punching blade portion on its lower surface, and this punching Since a plurality of impact blades that extend radially are formed on the upper part of the part, the solidifying plate is easily crushed and removed by the impact action of the vibration hammer.

Furthermore, if there are concrete lumps, cobblestones, or other buried reinforcing bars in the ground, obstacles such as the buried objects are ruptured and crushed by the conical punching blade part at the center of the lower surface and the radial impact blade. Are eliminated.

(Embodiment) Further, the configuration of the present invention will be specifically described based on an embodiment of a tip hole crusher shown in the drawings.

FIG. 1 is a side view of a punching and crushing hole punching machine configured so that four casing pipes 12 each having a punching and crushing blade 11 are added to a leader 1 of a pile driving machine to perform a drilling operation.

Reference numeral 13 is a suspension base to which the heads of the four casing pipes 12 are fixed, and 14 is a lower guide arm that also supports the lower end portion of the casing pipes 12. Both the lower guide arm 14 and the suspension base 13 are assembled so that they can be vertically moved up and down along the leader 1 of the pile driver. Reference numeral 15 is a vibration hammer mounted on the hanging platform 13 for giving vibration for driving the casing pipe 12 and 16 is provided between the vibration hammer 15 and the suspension wire 2 of the pile driver. It is a shock absorber.

FIG. 2 shows an embodiment of the punching and crushing blade 11 mounted on the lower end of the casing pipe 12, (A) is a plan view, (B) is a side view, and (C) is a bottom view. .

As shown in this figure, the punching and crushing blade 11 has a conical punching blade portion 11a at the center of its lower surface, and a special shape in which eight impact blades 11b are radially projected above the punching blade portion 11a. The punching and crushing blade 11 of FIG.

As shown in FIG. 2B of this embodiment, the lower surface of each impact blade 11b constituting the punching and crushing blade 11 has a flat bottom surface 11b ', and the impact from the vibration hammer is caused by the bottom surface 11b'. The impact blade 11b bites into the crack in the ground made by the conical punching blade portion 11a at the center and crushes a solid concrete block or the like.

By the way, FIG. 5 (A) shows a fractured state of the solidifying board 17 when the punching crushing blade 11 is driven to form a front hole in the surface ground having the solidifying board 17 having a concrete structure.

First, in FIG. 5 (A), (a) shows the case where the casing pipe 12 is vibrated by the vibration hammer 15, and the solidifying plate 17 is used.
The state in which the center of the lower surface of the punching and crushing blade 11 sticks to the surface layer of the above.

FIG. 5 (B) (a) ′ shows cracks generated in the surface layer of the solidifying plate 17 due to the punching and crushing blade 11 being stuck.

When the punching and crushing blade 11 is driven in the order of (b) and (c) of FIG. 5 (A), the solidifying plate 17 is changed to (b) ′ and (c) ′ of FIG. 5 (b). A piercing action is provided by fracture fracture as shown.

Finally, the punching and crushing blade 11 is attached to the casing pipe 12
When it is pulled out together, the solidifying plate 17 is provided with a front hole 18 as shown in (d) of FIG. 5 (A) and (d) 'of FIG. 5 (B).

Next, FIGS. 6 (a), (b), and (c) show the drilling action when a solid obstacle 19 such as a concrete block exists in the ground.

For example, if a hard obstacle 19 exists immediately below the punching and crushing blade 11 as shown in FIG.
Is broken by the vibration of the impact blade 11b of the crushing blade 11, and is pushed out of the path of the crushing blade 11.

In addition, when the casing pipe 12 is driven into and penetrated to a predetermined depth, the obstacle 19 pushed out of the path is pushed.
However, even if there is a case where the casing pipe 12 is pushed back toward the front hole 18 side by the earth pressure, when the casing pipe 12 is finally pulled out, that is, when the casing pipe 12 is pulled out as shown in FIG. By the upper edge of the impact blade 11b of the crushing blade 11, the obstacle 19 has a front hole 18
It is possible to push it out and maintain the function as a front hole for ground improvement work.

3 is a plan view of the suspension base 13 for fixing the heads of the casing pipes 12. In this embodiment, the suspension base 13 for holding four casing pipes 12 is constructed. The key-shaped one provided on the side surface of the suspension base 13 so as to project is a thruster guide 20, which engages with the leader 1 of the pile driver shown in FIG. It serves to guide the four fixed casing pipes 12 in the vertical direction.

FIG. 4 is a side view showing the casing pipe 12 fixed to the suspension base 13. As shown in this figure, the attachment means of the casing pipe 12 to the suspension base 13 is a joint flange 13 a provided on the lower surface of the suspension base 13 and a joint flange 12 provided on the head of the casing pipe 12.
It is configured to be detachably connected using a and.

The vibrating hammer 15 mounted on the suspension base 13 shown in FIG. 1 and the attachment means for the suspension base 13 are also the joint flange 13b provided on the suspension base 13 as shown in FIGS. 3 and 4. Joint flange 15 on the bottom surface of the vibration hammer 15
A is connected to a in the same manner as the connecting means of the casing pipe 12.

Further, in FIG. 4, the frame mounted on the lower end portion of the casing pipe 12 attached to the suspension base 15 has the lower guide arm 14 of the casing pipe 12 shown in FIG.
Thus, it is for holding the four casing pipes 12 and for holding the vertical movement along the leader 1. Overhang 2 on the right side of this guide arm 14
Reference numeral 1 constitutes an engaging portion for the leader 1 as with the thruster guide 20.

As described above, in this embodiment, the four casing pipes 12 equipped with the punching and crushing blade 11 having the special shape at the lower end are provided.
At the same time, the ground to be improved is configured to be driven and punched using the vibration hammer 15. Therefore, as described at the beginning, the surface to be improved is subjected to a solid surface treatment such as a solidifying surface. Pits for construction methods such as sand drains, packed drains, paper drains, etc., regardless of the location, or the ground where solid concrete blocks or other obstacles are buried in the ground. Can be easily drilled.

(Effect of the device) Since the punching and crushing hole punching device for hard ground such as hardened disk according to the present invention is configured as shown in the above embodiment, it should exert the following operational effects in ground improvement work. Is possible.

(1) A casing pipe having a specially shaped punching and crushing blade consisting of a conical punching blade portion and a plurality of impact blades that radially project, because it is configured to be driven using a vibration hammer, Efficiently drilling a front hole for ground improvement work, even if the surface is hardened with a solidifying surface, etc., or if solid obstacles such as concrete are buried in the ground can do.

Especially, since it is configured so that a plurality of casing pipes having a punching and crushing blade can be simultaneously punched,
Its effect is high.

(2) Because the casing pipe is configured to be detachable from the suspension base using a flange joint type, and the suspension base and lower guide arm can be easily assembled to a leader such as a pile driver. Assembling and disassembling on site is easy, and together with the action and effect of (1), it is possible to solve all the problems so far in the ground improvement work.

[Brief description of drawings]

The drawing shows an embodiment of a punching and crushing hole punching machine for underground obstacles such as a hardening board according to the present invention. Fig. 1 is a side view of the punching and crushing hole punching machine using a crawler type pile driving machine. Is.
Fig. 2 shows a specially shaped punching and crushing blade that constitutes the main part of the punching and crushing hole punching machine. (A) is a plan view, (B)
Is a side view and (C) is a bottom view. FIG. 3 is a plan view of a suspension frame to which the head of the casing pipe is attached, FIG. 4 is a partially cutaway side view showing a state where the casing pipe is attached to the suspension frame, and FIGS. 5 (A) and 5 (B) are improved. If the surface of the ground to be surface has been subjected to a surface treatment by a solidifying plate, a side view showing the work process when performing a drilling operation on the solidifying plate,
FIGS. 6 (a), (b), and (c) are side views showing a work process when an obstacle exists in the ground. 1 ... Leader, 2 ... Suspension wire 11 ... Punching crushing blade, 11a ... Punching blade part 11b ... Impacting blade 12 ... Casing pipe 13 ... Suspension stand 14 ... Lower guide arm 15 ... Vibration hammer 16 …… Shock absorber 17 …… Solidifying board, 18 …… Forehole 19 …… Obstacle 20 …… Thruster guide

Claims (1)

[Scope of utility model registration request] 1. A punching crushing blade having a conical punching blade portion in the center of the lower surface, and a plurality of impact blades radially protruding from the upper center of the conical punching blade portion, and a lower end portion of a casing pipe. , The casing pipes are attached to the suspension stand that mounts the vibration hammer, and the casing pipes are attached to a leader such as a pile driver, and the casing pipes are improved by the vibration hammer. A punching and piercing machine for punching underground obstacles such as a hardened plate that can be simultaneously driven into the ground to be ground.