JPS6131600A - Insert of steel material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for inserting a steel material into a rock anchor hole used in the construction of tunnels, underground cavities, etc.

[Prior art and its problems]

When inserting a cable such as a wire strand into an anchor hole in conventional rock anchor construction, which is used as reinforcement in the construction of tunnels and underground cavities, it is necessary to hold the cable accurately in the center of the anchor hole and strengthen the cable. Pushing the anchor into the anchor hole requires a large number of people to prepare and perform the work, and if the anchor hole is located diagonally or vertically above the cavity, it is difficult to hold the couple in the center of the anchor hole. This work was fraught with problems as it also made E'fc construction difficult.

[Purpose of the invention]

The present invention overcomes the drawbacks of conventional methods and provides a method for inserting steel materials, such as cables, into anchor holes accurately and efficiently.

[Structure of the invention]

The present invention has a steel material insertion hole extending vertically through the center of the upper part of the cylindrical body and a cylinder chamber penetrating through the lower part of the cylindrical body, and a cylinder rod inserted into the cylinder chamber and an outer part inserted into the cylinder body. A cylinder is installed in which the cylinder is integrated and has a steel material insertion hole running vertically through the center of the cylinder rod, and an upper chuck t-P3 for gripping the steel material is installed in the middle of the steel material insertion hole at the top of the cylinder, and the steel material is inserted into the upper part of the cylinder rod. Insert the tip of the cylindrical body of the steel material insertion device equipped with a lower chuck for gripping into the anchor hole, and fix the anchor hole from the inner surface with a support that expands and fastens the cylinder, then open and close the cylinder, upper chuck, and lower chuck, respectively. Connect to the pressure source through the valve, insert the steel material from the steel material insertion hole of the cylinder rod into the steel material insertion hole of the cylindrical body, grip the tip of the steel material in the upper chuck, and then lower the cylinder and insert it into the lower chuck. After gripping the steel material with the upper chuck and opening the upper chuck, the cylinder is fully raised to insert the steel material into the anchor hole, and the steel material is gripped with the upper chuck again, and the lower chuck is released to lower the cylinder. A steel material characterized in that the steel material is sequentially and repeatedly inserted into an anchor hole, or the support device is attached to a vehicle as a supporting device to which a locking device is attached to support the body of the steel material insertion device and secure it to a wall surface. [Embodiment] An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side sectional view of the steel material insertion device 1, and FIG. 2 is a partially enlarged sectional view of the support 4 at the tip.

The steel material insertion device 1 is composed of a cylindrical body 2 and a cylinder 7. The cylindrical body 2 has a steel insertion hole 12a extending vertically through the center of the upper part 3.
A cylinder chamber 11 is provided through the lower part 6 of the cylindrical body, and an upper chuck 5 is built therein for gripping a steel material inserted into the middle of the steel material insertion hole 12a. The cylinder 7 is the cylinder chamber 1 in the lower part 6 of the cylinder body.
A cylinder rod 9 that is fitted into the cylinder body 1 and has a steel material insertion hole 12b vertically passed through the center thereof, and an outer cylinder 10 that is fitted and inserted into the cylinder body 2 are integrated,
A lower chuck 8 for gripping the steel material is attached to the upper part of the cylinder rod 9.

Further, the cylinder 7 forms a cylinder chamber 21 between it and the lower part 6 of the cylinder body, and the cylinder 7 is lowered and raised by pressurizing and discharging hydraulic oil.

The upper chuck 5 and the lower chuck 8 grip and release the steel material by a hydraulic device which will be described later.

FIG. 2 is a detailed cross-sectional view of the support 4 that is attached to the tip 3 of the cylinder 2 and fixes the steel material insertion device 1 to the anchor hole 30. A conical tube 13 with an enlarged tip is screwed onto the tip of the cylinder 2. Arrived,
A plurality of divided contact pieces 14 that fit into this conical cylinder 13
is brought into contact with the outer surface of the anchor hole 3, and the spring 15 causes the contact piece 14 to expand by rotating the nut 16.
0 from the inner surface and has a structure that supports the steel material insertion device 1.

FIG. 3 is a block connection diagram of a hydraulic circuit for operating the upper chuck 5, the cylinder 7, and the lower chuck 8, in which the feed valve 17a'+18at 19a and the return' valve 17b are respectively shown.
, '18'b, 19b are connected to the hydraulic pressure generator 20, and are connected to the feed valve 17a.

18a and 19a actuate the upper chuck 5 and the lower chuck 8, the cylinder 7 descends, and the return valve 17 is activated.
b, 18b, 19b, the chucks 5, 8 are opened and the cylinder 7 is raised.

Next, the method of inserting the steel material will be explained. Figure 4 is a schematic construction drawing explaining the steel material insertion method, and Figures 5 to 7
The figure is a process explanatory diagram of the insertion method. First, steel material insertion device 1
Insert the tip of the cylindrical body 2 into the anchor hole 30 and attach the support 4.
It is fixed in the anchor hole 30 by. Next, as shown in FIG. 5, the steel material 31 is inserted through the steel material insertion hole 12b of the cylinder rod 9 into the steel material insertion hole 12a of the cylinder body 2, the upper chuck 5 is operated to grip the tip of the steel material 31, and the lower chuck 8 is released and the cylinder 7 is lowered.

Next, as shown in FIG. 6, after the cylinder 7 has been sufficiently lowered, the lower chuck 8 is operated to grip the steel material 31, and the upper chuck 5 is released and the cylinder 7 is raised, and the steel material 31 is inserted into the anchor hole as shown in FIG. Insert within 30.

Here, the upper chuck 5 is operated again to grip the steel material 31 as shown in FIG. 5, the lower chuck 8 is opened, and the cylinder 7 is lowered as shown in FIG.

As described above, the steel material 31 is inserted into the anchor hole 30 by sequentially repeating the operation and opening of the upper chuck 5 and the lower chuck 8 and the lowering and raising operations of the cylinder 7.

FIG. 8 shows another embodiment in which the steel material insertion device 1 is held in the anchor hole 30, in which the steel material insertion device 1 is held in the anchor hole 30, and instead of using the support 4, it is attached to the vehicle 32, the telescopic arm 34, and the telescopic piston 35.
, and a supporting device 33 comprising a locking tool 36 that locks to the wall surface and a holder 37 that holds the body of the steel material insertion device 1 at the tip is attached to hold the steel material insertion device 1 in the anchor hole 30. Therefore, this method is effective, for example, in construction work where the cavity has a large diameter and temporary equipment such as scaffolding is necessary.

〔Effect of the invention〕

The insertion method of the present invention accurately holds the steel material in the anchor hole,
This is a method of strongly inserting steel materials using mechanical force such as hydraulic pressure, and it is possible to insert steel materials accurately and efficiently, especially in the diagonal upward direction and vertical upward direction, which were previously difficult operations.

[Brief explanation of drawings]

Fig. 1 is a side sectional view of the steel material insertion device, the second factor is an enlarged sectional view of the support, Fig. 3 is a block connection diagram of the hydraulic circuit, Fig. 4 is a schematic construction drawing of the steel material insertion method, and Figs. FIG. 7 is a process explanatory diagram of the steel material insertion method, and FIG. 8 is a construction diagram of the steel material insertion method for supporting the steel material on the supporting device. DESCRIPTION OF SYMBOLS 1... Steel material insertion device 2... Cylinder body 3... Cylinder upper part 4... Support tool 5... Upper chuck 6
... lower part of cylinder 7 ... cylinder 8 ... lower chuck 9 ... cylinder rod 10 ... outer cylinder 11 ... cylinder chamber 12a, 12b ... steel material insertion hole 20 ... hydraulic pressure generation Device 30... Anchor hole 31... Steel material 32... Vehicle 33
...Support device 36...Latching device Applicant: Hazama Co., Ltd. Figure 1 Figure 3 J1!4 Figure 5 Figure 6 Figure 7

Claims (2)

[Claims] (1) A steel material insertion hole runs vertically through the center of the upper part of the cylinder, and a cylinder chamber is provided in the lower part of the cylinder, and the cylinder rod fitted into the cylinder chamber and the outer cylinder fitted into the cylinder are integrated into a cylinder. A cylinder with a steel material insertion hole running vertically is installed in the center of the rod, an upper chuck for gripping the steel material is built into the upper part of the cylinder body in the middle of the steel material insertion hole, and a lower chuck for gripping the steel material is provided at the top of the cylinder rod. Insert the tip of the cylindrical body of the steel material insertion device into the anchor hole, and fix the anchor hole with a support that expands and fixes the anchor hole from the inside, and then connects the cylinder, upper chuck, and lower chuck to a pressure source through respective on-off valves. Then, insert the steel material from the steel material insertion hole of the cylinder rod into the steel material insertion hole of the cylinder body, grip the tip of the steel material with the upper chuck, then lower the cylinder and grip the steel material with the lower chuck, and then tighten the upper chuck. After opening, the cylinder is raised, the steel material is inserted into the anchor hole, the upper chuck grips the steel material again, the lower chuck is released, and the cylinder is lowered. This operation is repeated sequentially to insert the steel material into the anchor hole. How to insert steel. (2) A steel material characterized in that the supporting device according to claim 1 is attached to a vehicle to support the body of the steel material insertion device, and a supporting device is provided with a locking device for locking to a wall surface. How to insert.