JPH0216818B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for drilling holes using an earth auger excavator, and an earth auger excavator for carrying out the method, particularly in places where the working position is low or narrow, such as under a road surface lining or under a bridge. Staking at the location,
The present invention relates to a hole drilling method using an earth auger excavator suitable for constructing continuous walls, etc., and an earth auger excavator for carrying out the method.

Conventionally, it has been considered impossible to construct single piles, continuous piles, etc. using an earth auger excavator in locations where the construction height is less than 5 m. However, in urban civil engineering work, pile construction for earth retaining and water-stopping has recently been carried out under roads, especially due to issues such as assessment. It is requested.

The present invention was made in response to this demand, and includes a hole drilling method using an earth auger excavator that can construct single piles, continuous piles, etc. with construction efficiency and safety similar to road construction without height restrictions. The object of this invention is to provide an earth auger excavator for carrying out the method.

According to the method of the present invention, in the drilling method using an earth auger drilling machine, at least two sets of screw heads are used, and the screw heads are located at the first drilling position and at the first drilling position. The excavator is installed at the position of the second hole at a predetermined distance from the hole, the excavator is installed at the position of the first hole, the auger motor is connected to the screw head, and the first hole is drilled with the screw head. Excavate, temporarily support the screw head on a guide wall, etc., disconnect from the auger motor, and move the excavator laterally. The intermediate screw is suspended by the chain block on the working arm of the excavator and connected to the screw head, and the excavator is returned to the first position.
, connect the auger motor to the intermediate screw, drill the first hole by one section of the intermediate screw, and repeat the above-mentioned horizontal movement or one section drilling operation as many times as required to drill the first hole. The drilling of the hole is completed, with the screw remaining in the first hole, and then the excavator is moved to begin drilling the second hole.

Further, according to the excavator of the present invention, a set of two leaders is installed at a predetermined interval on a truck equipped with running means such as running wheels and endless track strips, and the leader slides. The sheave is moved back and forth by a jack, and the inclination can be adjusted by a stage jack, and between the leaders there is a sheave that moves up and down guided by the leader by a lift jack installed on the leader. A wire rope with one end connected to the auger motor is strung around the sheave, and the other end of the wire rope is connected to a lift assist jack provided on the leader, and the wire rope is connected to a lift assisting jack provided on the leader. is attached with a rotatable working arm.

First, an example of an earth auger excavator for implementing the method of the present invention will be described with reference to FIGS. 1 to 5.

For example, traveling rails 1, 1 are laid along the construction site where a continuous wall is to be constructed, and an earth auger excavator, generally designated by A, runs on the rails 1, 1. The excavator A is equipped with trucks 2, 2A, and 2B, and the front and rear trucks 2A, 2B can be separated from the central truck 2. When constructing a continuous wall that contacts an adjacent structure, the rear truck 2B should be separated and constructed. The central truck 2 has relatively large diameter wheels 3, and the front and rear trucks 2A,
Wheels 3A and 3B with a relatively small diameter are attached to 2B, and the front and rear bogies 2
A, 2B has T provided along running rails 1, 1.
An anti-floating device 5 is provided which engages the character-shaped rails 4,4. The trolley 2 is provided with a travel motor 6, and the excavator A moves horizontally by electric travel.

Guide members 7, 7 are fixed to both sides of the truck 2 by welding or the like, and a slide member 8 is provided which slides in the front and back direction of the truck 2 while being guided by the guide members 7, 7. 8 to 2
The proximal ends of the readers 9, 9, which form a pair of books, are axially connected. A hydraulically operated slide jack 10 for moving the leaders 9, 9 in the front-back direction is provided between the cart 2 and the slide member 8, and a hydraulically operated stage jack for adjusting the longitudinal inclination of the leaders 9, 9. 11, 11 are provided between the cart 2 and the upper part of the leaders 9, 9.

Two sheaves 12, 12 are provided which move up and down guided by left and right leaders 9, 9, and guide members 14, 14 are provided at both ends of the support shaft 13. is leader 9,
9 to guide the sheaves 12, 12 along the leaders 9, 9. Further, a hydraulically operated lift jack 15 is provided between the base ends of the leaders 9, 9 and the sheaves 12, 12, and the sheaves 12, 12 are moved up and down by this lift jack 15.

The auger motor indicated by 16 as a whole is equipped with a motor and a speed reduction device, and the auger screw 17 is rotationally driven by this auger motor 16. The auger motor 16 has a wire rope 18,1
One end of 8 is connected, and the wire rope 1
8 and 18 are stretched over the sheaves 12 and 12,
The other end is connected to a hydraulically operated lift assist jack 19 connected to the base ends of the leaders 9,9. Therefore, by operating the lift jack 15, the sheaves 12, 12 are moved up and down, and accordingly, the auger motor 16 is moved up and down via the wire ropes 18, 18. Furthermore, by operating the lift assisting jack 19, the auger motor 16 is moved up and down via the wire ropes 18,18. The auger motor 16 is equipped with a guide gib 20, which engages with a guide shaft 21 provided integrally along the leaders 9, 9 to smoothly move the auger motor 16 up and down.

A working arm 22 is axially connected to the ends of the leaders 9, 9, and the mounting angle thereof can be adjusted by, for example, a turnbuckle 23.
The work arm 22 hangs the cab tire cable and water injection hose of the auger motor 16, and also attaches a chain block to the auger screw 1.
Perform the hanging work, etc. in step 7. The cart 2 is provided with a counterweight 24, and the cart 2A is provided with a counterweight 24.
A hydraulic unit 25 is mounted on. As mentioned above, the height of the earth auger excavator can be reduced by connecting the working arm 22 with the shaft and making it foldable in the middle.For example, the total length is 5 m and the upper part is foldable in the middle. Also, the auger crayon 17 is shorter than the conventional one, for example, 2.5 m.

In the above-mentioned earth auger excavator A, the traveling motor 6 is operated to move the excavator A laterally and sequentially to the drilling position, and the slide jack 10 is operated to move the leaders 9 back and forth to move the stage jack. 11 can be operated to adjust the longitudinal inclination of the leaders 9,9. In addition, the lift jack 15 and the lift assist jack 19 are operated to move the auger motor 16 up and down, thereby adding the auger screw 17 and the like.

Figures 6 to 9 show other examples of earth auger excavators, and those shown in Figures 1 to 5 are 1
The one shown in Figures 6 to 9 is a three-shaft auger, and the same parts as those shown in Figures 1 to 5 are given the same reference numerals, but in this example there are three augers. August 17th, 17th, 17th
This allows three holes to be drilled at the same time.

Details of the auger motor 16 are shown in FIGS. 8 and 9, and the frame 26 is provided with a motor 27, a high speed reduction device 28, and a low speed reduction device 29.
The rotation of the output shaft of the motor 27 is decelerated by a high speed reduction device 28, further decelerated by a low speed reduction device 29, and transmitted to a coupling 30, which rotationally drives auger screws 17, 17, 17 connected to a flange 31. A planetary gear type reduction gear is used as the low speed reduction gear 29.
is not provided on the output axis of the motor 27 but offset therefrom. This reduces the height of the excavator A. Further, sheaves 32, 32 are provided on both sides of the frame 26, and a hanging drum 33 and a water injection device 34 are also provided. Furthermore, the frame 26 has three guide gibs 20, 2.
0,20 is provided, and this guide give 2
0, 20, 20 engage with guide shafts 21, 21 provided integrally with the leaders 9, 9 to smoothly move the auger motor 16 up and down.

Next, a method of excavating a hole to create a continuous wall using the earth auger excavator shown in FIGS. 1 to 5 will be described with reference to FIG. 10.

(a) Using two sets of screw heads (intermediate screw heads are not shown),
The screw head is installed at a first drilling position and a second drilling position separated from the first drilling position by a predetermined distance.

(b) Install the excavator A at the location where the hole is to be drilled, connect the auger motor 16 to the screw head, and use the screw head to drill the hole.

(c) Temporarily support the screw head on a guide wall, etc., and disconnect it from the auger motor 16 and remove it from the excavator A.
move laterally.

(d) Suspend the intermediate screw using the chain block of the working arm 22 of excavator A and connect it to the screw head.

(e) Install excavator A again at the drilling position,
The auger motor 16 is connected to the intermediate screw and a hole is drilled by one section of the intermediate screw.

(F) Repeat each operation from (C) to (E) the required number of times to complete the drilling of the hole. At this time, the screw remained in the hole.

(g) Move the excavator A to the drilling position, connect the auger motor 16 to the other set of screw heads installed at the drilling position in step (a), and drill the hole with the screw head. do.

(h) After drilling the hole with the screw head, temporarily support the screw head on a guide wall, etc.
The auger motor 16 is separated from the screw head and the excavator A is returned to the drilling position.

(l) Auger motor 16 is installed in the intermediate screw of hole drilling.
is connected, one section of the intermediate screw is pulled up and temporarily supported on a guide wall, etc., and the excavator A is moved to the position of the drilling hole 2 with the auger motor 16 and one section of the intermediate screw connected.

(J) Connect the screw head of the drilling hole and the intermediate screw and drill one section of the intermediate screw.

(l) Repeat each operation from (ch) to (n) the required number of times to complete the drilling of the hole.

(E) Return excavator A to the drilling position again and drill hole 1.
The screw head is connected to the auger motor 16, and the excavator A is moved to a third drilling position separated by a predetermined distance from the drilled hole, and the drilled hole is drilled with the screw head.

(W) Complete the work of (C) through (N) between drilling and drilling of the holes.

(f) Drill the fourth hole, fifth hole, etc. in the same manner and complete.

For (a), the H-section steel is installed when the screw head of the drilled hole is moved to the drilled hole.
In addition, (b) and (c) are assumed to be after the screw head of the drilled hole has been moved to the drilled hole.

In the above-mentioned process, the excavator A is moved by operating the travel motor 6, and the vertical movement of the auger motor 16 when connecting the auger screw and the auger motor 16 is carried out by operating the lift jack 15 and the lift auxiliary jack 19. conduct.

As explained above, according to the present invention, two sets of head screws are used, and the intermediate screws are successively connected to the head screw installed at the position of the first hole to drill the first hole to a predetermined depth. After drilling the first hole, the intermediate screw used for drilling the first hole is pulled out one section at a time and connected to the head screw installed at the second hole location. After drilling the second hole and drilling the second hole to a predetermined depth, install the head screw used for drilling the first hole at the position of the third hole,
In addition, the intermediate screw used to drill the second hole was pulled out one section at a time and connected to drill the third hole, and the same operation was performed thereafter to drill the fourth and fifth holes. , . . . , and so on, the hole can be drilled with an extremely efficient earth auger excavator. As an earth auger excavator, for example, the total length is 5 m and the top 1 m is bent in the middle, and as an auger motor, the deceleration device can be offset from the axis of the motor's output shaft without placing the deceleration device on the axis of the motor's output shaft. By using a product with a shorter overall length, it is no longer possible to drive piles or construct continuous walls using an earth auger excavator at a construction height of 5 m or less, such as under road surface coverings or under bridges. This makes it possible to construct piles, continuous walls, etc., with the same efficiency and safety as on-road construction without height restrictions, even in areas where the construction has previously been carried out.

[Brief explanation of drawings]

Figures 1 to 5 show a first embodiment of the earth auger excavator, with Figure 1 being a side view, Figure 2 being a front view, Figure 3 being a plan view, and Figure 4 showing the structure of the leader and sheave. A detailed sectional view showing the relationship, and FIG. 5 is a detailed front view of the floating prevention device. Figures 6 to 9 show a second embodiment of the earth auger excavator, with Figure 6 being a side view, Figure 7 being a front view, Figure 8 being a detailed front view of the auger motor, and Figure 9 being the same plane. 10 are explanatory diagrams showing the work process. 1...Rail, 2, 2A, 2B...Dolly, 9...Leader, 10...Slide jack, 11...Stage jack, 12...Sheave, 15...Lift jack, 1
6... Auger motor, 17... Auger screw, 1
8...wire rope, 19...lift assist jack,
22... Working arm, 27... Motor, 28... High speed reduction device, 29... Low speed reduction device, 30... Coupling.

Claims (1)

[Claims] 1. A method for drilling a hole using an earth auger excavator, in which at least two sets of screw heads are used, and the screw head is connected to the position of the first hole and from the position of the first hole. The drill is installed at the position of the second hole at a predetermined distance, the excavator is installed at the position of the first hole, the auger motor is connected to the screw head, and the first hole is drilled with the screw head. Then, temporarily support the screw head on a guide wall, etc., disconnect it from the auger motor, and move the excavator laterally. The intermediate screw is suspended by the chain block of the working arm of the excavator and connected to the screw head, the excavator is installed again in the position for drilling the first hole, the auger motor is connected to the intermediate screw and the first hole is drilled. Drill one section of the intermediate screw, and repeat the above-mentioned horizontal movement or one section excavation operation as many times as necessary to complete the drilling of the first hole, and at this time, the screw remains in the first hole. A drilling method characterized in that the drilling machine is moved and a second drilling operation is performed by moving the excavator. 2. A pair of leaders are set up at a predetermined distance on a cart equipped with running means such as running wheels or endless track strips, and the leaders are moved back and forth by a slide jack. It is possible to adjust the front and rear inclination with a stage jack, and between the leaders there is a sheave that moves up and down guided by the leader with a lift jack installed on the leader. A wire rope is connected to the auger motor at one end, and the other end of the wire rope is connected to a lift assisting jack provided on the leader, and a work arm is rotatably attached to the tip of the leader. An earth auger excavator characterized by being attached. 3. The earth auger excavator according to claim 2, wherein the auger motor includes a motor and a speed reduction device, and the speed reduction device is provided offset from the axis of the output shaft of the motor.