JPH04108623U - Pile driving equipment for reinforcing piles for civil engineering works - Google Patents

Abstract

(57) [Summary] [Purpose] Inject cement into the tunnel bedrock in a columnar manner.
To improve the efficiency of pile driving work in civil engineering work where reinforcing piles are driven before consolidation. [Structure] A rock support holding part 12 is provided at the delivery port 7 of the pile driver 1, and a temperature-sensitive actuating member 16 is arranged in the holding part 12 so as to be able to expand and contract. A temperature-sensitive operating member 16 is brought into pressure contact with an opening made in the bedrock, and the reaction force during pile driving is received by the bedrock.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention can be used to drive reinforcing piles into bedrock, for example in civil engineering work inside tunnels. Regarding the equipment, this is a technology that prevents the worker from being subjected to reaction force during pile driving work.

0002

[Conventional technology]

In general, in the case of civil engineering work that strengthens rock or soft ground in tunnels, A row of cement pillars is constructed by injecting a solidifying agent such as cement milk into the rock or ground. A pile driver is used to drive reinforcing piles such as reinforcing bars into the cement pillars before solidification. The strength of the column rows is strengthened.

0003 The pile driving device targeted by this invention has the following basic structure: Regarding. For example, as shown in FIG. 1 or 12, the receiving port 6 of the pile driver 1 is The roller pressure path 2 is connected to the drive roller 3, and the roller pressure path 2 is connected to the drive roller 3. A pinch roller 4 is arranged opposite to each other with a pinching space 5 between the driving roller and the pinch roller 4. 3 is linked to the roller drive source 8, and the reinforcing pile 10 carried in from the receiving port 6 is held between the rollers. It is of a type in which it is compressed in a pressure path 2 and transported out from a delivery port 7.

0004 With this basic structure, conventional pile driving equipment consists of large piles assembled into a tower-like structure. There is one described in Japanese Utility Model Application Publication No. 129436/1983. As shown in FIG. 12, the tower 50 is mounted on a truck 53, and the tower 50 is A receiving opening 6 with a pair of guide rollers 51 and 52 arranged on the upper part 50a of the The roller clamping path 2 is provided at the closer portion 50b, and the delivery port 7 is provided at the lower portion 50c. It has been placed. Then, a trolley was placed above the row of soil cement pillars formed in the soft ground. 53 and send the reinforcing pile (here, reinforcing bar) 10 downward from the top of the tower-shaped body 50. Then, reinforcing bars 10 are driven into predetermined positions of the soil cement column rows. this place In this case, the reaction force when driving the reinforcing pile 10 into the ground is absorbed by the weight of the device itself.

[0005]

[Problem that the idea aims to solve]

However, when strengthening the rock in a narrow place such as a tunnel, the above method is recommended. Because large equipment cannot be brought in, pile driving has to be done manually, which reduces work efficiency. The problem was that it was low.

[0006] Therefore, the inventor of the present invention designed a pile driving device to be hand-held like a small jackhammer. The first idea was to bring it into the tunnel and work on it. But in this case, Since the workers are directly subjected to the reaction force during pile driving, the workers are highly fatigued and their work performance is reduced. There was still room for improvement in increasing the rate. The object of the present invention is to provide a compact pile driving device with high working efficiency.

[0007]

[Means to solve the problem]

In order to achieve the above object, the present invention has added the following improvements to the above basic structure. For example, as shown in FIGS. 1 to 4 and 9 to 11, or FIGS. 5 to 8, A rock support holding part 12 is provided at the delivery port 7 of the pile driver 1, and the rock support holding part 12 12 is composed of a holding section main body 14, a temperature-sensitive operating member 16, and a heater 17, and The part body 14 is formed along the advancing direction A of the reinforcing pile 10, and the holding part body 14 is The above-mentioned temperature-sensitive actuating member 16 is arranged on the outer surface 15, The temperature-sensitive actuating member 16 is heated by the heater 17 so that the temperature-sensitive actuating member 16 is moved directly in the advancing direction A. Expansion position P that opens in the crosswise direction B and closes in the orthogonally inward direction C due to cooling of the heater 17 It is configured so that the position can be switched between the contracted position Q and the retracted position Q. The temperature-sensitive actuating member 16 may be a shape memory alloy, a bimetal, or a thermowax. In the case of an element itself such as a box, and in the case of incorporating each element as an actuator to create an actuating part. It is conceivable that the material may be made up of materials.

[0008]

[Effect]

For example, during rock reinforcement work for tunnels, cement milk and other solidifying agents are poured. Insert the rock holding part 12 of the pile driver 1 into the opening of the rock that has been inserted, and turn on the heater 17. When heated, the temperature-sensitive actuating member 16 disposed on the outer surface 15 of the holding part main body 14 moves to the expanded position. The diameter is expanded to P, and the pile driver 1 is pressed into contact with the peripheral wall of the above-mentioned hole, and the entire pile driver 1 is fixed to the rock. determined. When the driving roller 3 is driven to rotate in this state and pile driving is performed, the reaction force of driving the pile is as follows. It is received by the surrounding wall of the opening in the rock via the rock support holder 12, and is transmitted to the operator. No. On the other hand, when the temperature-sensitive actuating member 16 is cooled and switched to the contracted position Q, the rock The press contact state of the temperature sensing member 16 against the peripheral wall of the opening is released. This allows It is permitted to remove the rock holding part 12 from the opening of the rock.

[0009]

[Effect of the idea]

Since the present invention is configured and operates as described above, it has the following effects. By switching the temperature-sensitive actuating member from the contracted position to the expanded position, reaction during pile driving is reduced. Since the force is absorbed by the rock and not transmitted to the worker, worker fatigue is reduced. Pile driving work can be done efficiently. Moreover, the pile driving device of the present invention is equipped with a rock holding part at the delivery port of the pile driver. It can be implemented at low cost because it requires only a simple structure.

0010

【Example】

Hereinafter, embodiments of the present invention will be described based on the drawings. Figure 1 shows pile driving in Example 1. Figure 2 is a plan view of the pile driving device, and Figure 3 is the rear view of the pile driving device. 4 are schematic explanatory diagrams of the pinch roller pressing mechanism of the pile driving device.

[0011] As shown in Figures 1 to 3, the pile driving device described above is a horizontally cylindrical pile driver. A receiving port 6 is opened at the rear of the machine 1, a delivery port 7 is opened at the front of the receiving port 6, and a receiving port 6 is opened at the front of the machine 1. A roller pressing path 2 is formed in the center, and the receiving port 6 is sent out through the roller pressing path 2. It is constructed facing the opening 7. As shown in FIGS. 1 and 3, the roller clamping path 2 is located at the upper front of the pile driver 1. Attach the pinch rollers 4 and 4 to the rear two locations, and install one drive roller below them. Attach the roller 3 and place the drive roller 3 and pinch roller 4 facing each other with a pinching space 5 between them. It is arranged in a shape.

0012 That is, as shown in FIGS. 1 and 2, the front upper part of the casing 18 of the pile driver 1 is A pair of brackets 19, 19 are provided to protrude upward, and a pair of brackets 19, 19 are provided with a pin at the rear upper part of the casing 18. A pinch roller pressing device 20 is provided between the left and right fixing plates 21 and 21 that protrude upward. The pinch rollers 4 are supported in a rotatable manner, and the front part of the fixed plate 21 is connected to the hinge pin 22. It is pivotably supported between the brackets 19 and 19 via the It is locked to the chill roller pressing device 20.

[0013] As shown in FIGS. 1 to 3, the pinch roller pressing device 20 has a casing The threaded rod 23 raised from 18, the compression spring 24 fitted therein, and the threaded rod 23 It consists of a wing nut 25 screwed together. A receiving plate 26 is installed horizontally on the rear of the fixed plates 21, 21, and A U-groove 27 is cut out at the rear end of the plate 26, and the screw of the above-described compression device 20 is inserted into this U-groove 27. Insert the rod 23 and press the output part of the compression spring 24 against the lower surface 26b of the receiving plate 26. Then, the wing nut 25 is tightened on the upper surface 26a of the receiving plate 26.

[0014] As shown in FIGS. 1 to 3, the side surface 18a of the casing 18 of the pile driver 1 described above The oil motor 8, which is the roller drive source, is installed orthogonally to the The output shaft 8a is interlocked with the drive roller 3, and the inside of the casing 18 is inserted from the receiving port 6. The reinforcing piles (rock bolts in this case) 10 carried into the While being pinched between the drive roller 3 and the pinch roller 4, 7 to the front of the pile driver 1.

[0015] On the other hand, as shown in FIGS. 1 and 2, the pile driver 1 has an anti-rock The holding part 12 for the rock is removably extended and fixed via the fastener 28, and the holding part 12 for the rock 12 is composed of a holding section main body 14, a temperature-sensitive operating member 16, and a heater 17. The holding part main body 14 is formed into a cylindrical shape, and the outer peripheral surface 15 of the main body 14 has a cylindrical shape. The two temperature-sensitive actuating members 16 are externally fitted in series, and a series is formed on the inner peripheral surface of the temperature-sensitive actuating member 16. A heater 17 consisting of a con rubber heater is placed in front.

[0016] As shown in FIGS. 9 to 11, the temperature-sensitive actuating member 16 has a rectangular shape memory structure. A large number of slits 30 are cut out in the metal plate 29, and the alloy plate 29 is wound into a cylindrical shape. The diameter is expanded by turning on and off the heater 17. It is configured to be switchable between a position P and a contracted position Q where the diameter is reduced. That is, the temperature-sensitive actuating member 16 is made of, for example, a Ni-Ti alloy and heated at 70 degrees Celsius. When heated to a temperature of The rock bolt 10 bulges outward (perpendicularly to the advancing direction A) and enters a shape memory state. (Specifically, it is displaced to the expansion position P). On the contrary, the temperature-sensitive actuating member 16 When cooled, as shown by the imaginary line in FIG. The diameter is reduced inward (perpendicular to the advancing direction A of 10) and switched to the straight pipe-like contracted position Q. Waru. In addition, in FIGS. 2 and 3, the grip 32 includes a heater switch 32a and a heater switch 32a. An oil motor switch (not shown) is provided.

[0017] Next, the functions of the pile driving device of the first embodiment will be explained. (1) For example, during rock reinforcement work for tunnels, cement milk or other solidifying agents are poured. Insert the rock holding part 12 of the pile driver 1 into the opening of the rock that has been inserted, and then turn the heater switch on. When the switch 32a is turned on and the heater 17 is heated, the temperature-sensitive operating part of the holding part 12 The material 16 opens to the expanded position P as shown by the solid line in FIG. is pressed into contact with the This allows the entire pile driver 1 to be positioned and fixed relative to the bedrock. be done.

[0018] (2) In this state, turn on the oil motor switch (not shown) and drive the drive roller 3. When the lock bolt 10 is pressed by the roller pressing path 2, 7 and the internal space of the holding part main body 14 to the front of the pile driver 1, and the pile driver The work will then begin. In this case, the reaction force of pile driving is between the rock retaining part 12 and the rock mass. It is caught at the contact part with the opening and is not transmitted to the operator.

[0019] Note that the degree of pinching force of the lock bolt 10 is determined by the pressure of the pinch roller, as shown in FIG. Adjust the wing nut 25 of the device 20 between the strong pressure position S and the soft pressure position R and fix it. This is done by adjusting the swing angle of the plate 21.

[0020] (3) When the heater switch 32a is turned off and the temperature-sensitive actuating member 16 cools down, as shown in FIG. As shown by the imaginary line in the middle, the temperature-sensitive member 16 closes to the contracted position Q, so that the rock The press contact state of the temperature sensing member 16 against the opening of the plate is released, and the holding part 1 for the rock plate is released. 2 can be removed from the opening.

[0021] Embodiment 2 of the present invention is shown in FIGS. 5 to 8, and FIG. 5 is a vertical side view of the pile driving device. 6 is a plan view of the same pile driving device, FIG. 7 is a rear view of the same pile driving device, and FIG. 8 is a plan view of the same pile driving device. FIG. 2 is a schematic explanatory diagram of a pinch roller pressing mechanism of FIG. In this pile driving device, the pinch roller pressing machine of the pile driving device of Example 1 above is used. The mechanism has been replaced with a rotating structure using an operating lever instead of a tightening structure using a wing nut. It is.

[0022] That is, a U-shaped frame 35 is placed in the center of the fixed plate 21 that supports the pinch rollers 4. the guide rod 36 from the U-shaped frame 35, and the upper end of the guide rod 36. When the cam-shaped switching plate 39 of the operating lever 38 is fitted and pivoted via the pivot pin 37, In both cases, the cam portion of the switching plate 39 is brought into contact with the upper wall 18b of the casing 18. In addition, a compression spring 40 is interposed between the upper wall 18b and the U-shaped frame 35.

[0023] As shown in FIG. 8, when the operating lever 38 is tilted horizontally, the switching plate 39 The distance K between the pivot point 41 and the casing upper wall 18b becomes shorter, and the pinch roller 4 becomes more elastic. It is pressed downward by the pressure spring 40 and moves to the pressing position T. Conversely, operating lever 3 8, the pivot point 41 in the switching plate 39 and the casing upper wall 18b The distance L between the pinch roller 4 and the pinch roller 4 is pulled up against the elastic spring 40. It switches to the pressure release position W. Note that the cam shape of the switching plate 39 may be changed. As a result, the relationship between the switching position of the operating lever 38 and the pressing state of the pinch roller 4 is improved. It is possible to do the opposite.

[0024] In addition, the present invention provides a holding part 12 for rock mass at the delivery port 7 of the pile driver 1, Any structure in which the temperature-sensitive operating member 16 is disposed on the holding portion 12 may be used. Its temperature-sensitive operation The form of the member 16 is not limited to each of the above embodiments, for example, the form of the member 16 may be radially arranged. The arm member made of shape memory alloy may be configured to expand, or the arm member made of shape memory alloy may be expanded. There is no problem in using bimetal or thermowax as the temperature-sensitive actuating member.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional side view of a pile driving device showing a first embodiment.

FIG. 2 is a plan view of the pile driving device.

FIG. 3 is a rear view of the pile driving device.

FIG. 4 is a schematic explanatory diagram of a pinch roller pressing mechanism of the pile driving device.

FIG. 5 is a longitudinal sectional side view of a pile driving device showing a second embodiment.

FIG. 6 is a plan view of the pile driving device.

FIG. 7 is a rear view of the pile driving device.

FIG. 8 is a schematic explanatory diagram of a pinch roller pressing mechanism of the pile driving device.

FIG. 9 is a developed view of the temperature-sensitive actuating member.

FIG. 10 is a vertical right side view of the temperature-sensitive actuating member.

FIG. 11 is a longitudinal sectional front view of the temperature-sensitive actuating member.

FIG. 12 shows the prior art and is an elevational view of a pile driving device.

[Explanation of symbols]

1...Pile driver, 2...Roller clamping path, 3...Drive roller, 4
...pinch roller, 5...pinch space, 6...1 receiving port,
7... Delivery port of 1, 8... Roller drive source (oil motor), 10... Reinforcement pile (rock bolt), 12... Holding part for rock mass, 14... Holding part main body, 15... Outer surface of 14, 16... Temperature sensing Operating member, 17...heater, A...advancing direction of 10, B...
A orthogonally outward, C...A orthogonally inward, P...16 inflated position, Q...16 in contracted position.

Claims (1)

[Scope of utility model registration request] Claim 1: The receiving port (6) of the pile driver (1) faces the delivery port (7) via a roller pressure path (2), and the roller pressure path (2) is connected to the drive roller (3). ) and a pinch roller (4) are arranged facing each other with a pinching space (5) between them, and the drive roller (3) is interlocked with a roller drive source (8). ) The reinforcing pile (10) brought in from
In a pile driving device for reinforcing piles for civil engineering works, which are compressed by the screwdriver (2) and carried out from the delivery port (7), the rock holding part (12) is attached to the delivery port (7) of the pile driver (1). The rock support holding part (12) is connected to the holding part main body (14) and the temperature-sensitive actuation member.
(16) and a heater (17).
4) is formed along the advancement direction (A) of the reinforcement pile (10),
The temperature-sensitive actuating member (16) is arranged on the outer surface (15) of the holding portion main body (14), and the temperature-sensitive actuating member (16) is connected to the heater.
The expansion position (P) opens perpendicularly outward (B) with respect to the advancing direction (A) due to the heating of the heater (17), and the contracted position (Q) closes perpendicularly inwardly (C) as the heater (17) cools. ) A pile driving device for reinforcing piles for civil engineering work, characterized in that it is configured to be able to switch positions.