JPS6027157Y2 - Equipment for pulling out earth retaining structures, etc. in excavated trenches - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for extracting earth retaining structures and the like in excavated trenches.

Recently, when excavating trenches for burying water, sewage, gas, etc. piping, telegraph and telephone cables, power transmission lines, etc., in order to prevent landslides on the side walls of the trench, some of the trenches have been dug as shown in Figure 1. Two pillars 3 having guide grooves 2 on both left and right sides are facing each other on the inner wall of an excavated groove 1, and a support jack 4 is stretched over a connecting member 3a fixed in front of the pillars 3 to connect them. The pillars 3 are erected, and then one end of the retaining plate 5 is fitted into the guide groove 2 on one side of the opposing pillar 3 to be press-fitted into the soil, and then the other end of the retaining plate 5 is supported. Guide groove 2 on the other side of the next two opposing columns 3 connected with jacks 4
After that, the assembled earth retaining structure is press-fitted into the soil at the same time as the trench 1 is deeply excavated.
An earth retaining method is implemented in which the earth retaining plate 5 is fitted between the guide grooves 2 of the pillar 3 and extended upward, and as the groove is further excavated in the longitudinal direction, the earth retaining structure is sequentially assembled and connected using the above procedure. There is.

By the way, depending on the construction site where the earth retaining method is used, there are soil types that require a large amount of soil to be applied to the earth retaining structure.

In such a case, if you install, for example, a sewage pipe at the bottom of the excavated trench 1 and backfill the excavated trench 1 with earth and sand, if you attempt to pull out the earth retaining plates 5 and supports 2, the large earth pressure resistance will cause even a crane to be unable to do so. It may not be easily pulled out of the soil.

This invention was made to solve this problem,
To provide a device for pulling out earth retaining structures, etc., which can easily pull out earth retaining plates and columns even when the earth pressure resistance is so large that even a crane cannot easily pull them out of the soil.

Below, an embodiment of the pulling device for earth retaining structures, etc. according to the present invention will be explained with reference to the drawings.
' are opposing bases each having a support 7 at both ends, and a vertically rotatable tubular holder 8 is connected to the upper end of the support 7 at both ends of each of the bases 6, 6'. The proximal end of the inclined rod 9 is inserted into the holder 8, and is tightened and fixed with a set screw 10 provided on the outer periphery of the holder 8.

A guide pipe 12 rotatably attached to both ends of the horizontal rod 11 is connected to the inclined rod 9 between the inclined rods 9 and 9 connected to the upper end of the support column 7 of one base 6 via the holder 8. The guide pipes 12 are movably fitted together and fixed by a set screw 13 on the outer periphery of the guide pipe 12, so that the horizontal rod 11 is stretched.

A guide pipe 14 is rotatably attached to the inside of the guide pipe 12 at both ends of the horizontal rod 11, and is connected to the upper end of the support 7 of the other base 6 via a holder 8. The inclined rod 9 is slidably inserted through the guide pipe 14 and fixed by a set screw 15 on the outer periphery of the guide pipe 14.

A U-shaped metal fitting 16 is fixed to the lower ends of the opposing inclined rods 9, that is, the tubular holder 8, and a chain 17 is stretched thereon.

A movable pulley 18 is suspended from the center of the horizontal rod 11, and retaining board lifting fittings 20 and column lifting fittings 21 are alternately attached to hooks 19 of the movable pulley 18.

The earth retaining plate lifting fitting 20 has a rod 20c with a protrusion 20b attached to the lower ends of two hanging ropes 20a, which is inserted and locked into a through hole 5a (see FIG. 1) on the upper edge of the earth retaining plate 5.

The column lifting fitting 21 has a two-pronged metal fitting 21b attached to the lower end of two hanging ropes 21a, which is connected with a pin to the upper end of the support jack connecting member 3a on the front side of the column 3.

Next, a description will be given of how to use the device for pulling out earth retaining structures, etc., according to the present invention, which is constructed as described above.

As shown in FIG. 1, earth retaining structures are sequentially assembled and connected to the inner wall of the excavated trench 1, and when a sewer pipe 25, for example, is laid at the bottom of the excavated trench 1 as shown in FIG. Earth and sand 26 is backfilled inside.

The pillars 3 and retaining plates 5 of the earth retaining structure are then pulled out, but depending on the soil quality of the construction site, even a crane may not be able to pull them out easily.

In such a case, the device for extracting the earth retaining structure or the like according to the present invention is carried to the site and set.

That is, the steel sheet piles 27 are placed on both sides of the retaining board 5 to be pulled out.
The bases 6 are erected facing each other on the steel sheet piles 27, and the base ends of inclined rods 9 of the required length are attached to the holders 8 at the upper ends of the columns 7 of each base 6. Insert and tighten the set screw 1 on the outer periphery.
Tighten and fix at 0.

Next, a horizontal rod 11 is slidably suspended between the inclined rods 9 on one side of the base 6 through the guide pipes 12 at both ends thereof, and is attached to the guide pipe 14 on the inside of the guide pipe 12 on the other side of the base 6. The side inclined rod 9 is slidably inserted.

Next, while appropriately rotating the opposing inclined rods 9, the guide pipe 12.14 is moved to move the horizontal rod 11 above the retaining plate 5 to be pulled out, and the set screw 13. 15 to fix the horizontal rod 11.

Next, a chain 17 is tensioned between U-shaped metal fittings 16 fixed to opposing holders 8, and each inclined rod 9 is fixed so as not to rotate.

Next, a movable pulley 18 is suspended from the center of the horizontal rod 11, and a retaining board lifting fitting 20 is attached to the hook 19 of this movable pulley 18.

However, in order to pull out the earth retaining plate 5 using the pulling device for the earth retaining structure of the present invention set as described above, first, the rod 20c with the two protrusions 20b of the earth retaining plate lifting fitting 20 is attached to the soil 2.
It is inserted and locked into the through hole 5a at the upper edge of the retaining plate 5 embedded in the retaining plate 6.

Next, the hanging ring 18b at the end of the rope 18a that has been passed through the movable pulley 18 is hung on the hook 29 at the lower end of the hanging rope 28 of a crane (not shown).

Next, the suspension rope 28 of the crane is pulled up, and the retaining plate 5 is pulled out from the ground by the retaining plate lifting fitting 20 via the movable pulley 18.

Once the retaining board 5 has been pulled out several tens of centimeters from the soil, remove the retaining board lifting fitting 20 from the retaining board 5, loosen the setscrews 13, 15 on the outer periphery of the guide pipe 12, 14, and lift the inclined rod 9.
While rotating, the guide pipes 12 and 14 are moved to move the horizontal rod 11 above the opposing retaining plate 5.

and set screws 13,1 on the outer periphery of the guide pipe 12.14.
5 to fix the horizontal rod 11, and connect the earth retaining plate hanging fittings 20 suspended from the movable pulley 18 to the earth retaining plate 5 embedded in the soil as described above, then tighten the crane suspension rope. 27, and the retaining plate 5 is pulled out from the soil using the retaining plate lifting fitting 20 via the movable pulley 18.

After pulling out the retaining board 5 several tens of centimeters from the soil, the rope 1 of the movable pulley 18 is pulled out from the hook 29 of the suspension rope 28 of the crane.
At the same time, remove the suspension ring 18b at the end of 8a, and remove the earth retaining plate lifting fitting 20 from the hook 19 of the movable pulley 18.

Next, the entire extraction device of the present invention is moved to and installed at the next retaining board extraction location.

Next, the earth retaining plate lifting fitting 20 is connected again to the earth retaining plate 5 which has been pulled out several tens of centimeters from the soil, and the hanging rope 20a of this earth retaining plate lifting fitting 20 is connected to the hook 2 of the crane's hanging rope 28.
9, the earth retaining board 5 is completely pulled out from the soil by pulling up the hanging rope 28 of the crane.

Similarly, the opposing retaining board 5 is also completely pulled out from the soil.

In addition, in order to pull out the struts 3 using the pull-out device for the earth retaining structure of the present invention, first, as shown in Fig. 4, steel sheet piles 27 are laid on both outsides of the opposing struts 3 to be pulled out. 2
Move and install this device on 7.

Next, the set screw 13.15 on the outer periphery of the guide pipe 12.14
Loosen the guide pipe 12. while rotating the inclined rod 9.
14 to move the horizontal rod 11 above the middle of the opposing columns 3.

Next, set screws 13 on the outer periphery of this guide pipe 12.14
．． 14 to fix the horizontal rod 11, and this horizontal rod 11
A post hoisting fitting 21 is attached to the hook 19 of the movable pulley 18 which is suspended from the top.

Next, the support jack connecting member 3a on the front side of the pillar 3 that faces the bifurcated metal fittings 21b of this pillar lifting metal fitting 21
Connect the pin to the top edge of the .

Next, the suspension ring 18b at the end of the rope 18a that has been passed through the movable pulley 18 is hooked onto the hook 29 at the lower end of the crane's suspension rope 28, and then the crane's suspension rope 28 is pulled up and the support strut lifting bracket is attached via the movable pulley 18. At 21, the opposing pillars 3 are pulled out of the soil while still being connected by the support jacks 4.

After pulling out several tens of centimeters, the hanging ring 1 at the end of the rope 18a of the movable pulley 18 is pulled out from the hook 29 of the hanging rope 28 of the crane.
8b and at the same time, remove the strut lifting fitting 21 from the hook 19 of the movable pulley 18.

Next, the entire extraction device of the present invention is moved and installed at the next support extraction location.

Next, the suspension ropes 21a of the strut lifting fittings 21 are hooked onto the hooks 29 of the crane suspension ropes 28, and the two opposing struts 3, which have been pulled out of the soil by several tens of centimeters by the lifting of the crane suspension ropes 27, are suspended in the soil. Pull it out completely from inside.

As can be seen from the above explanation, the device for extracting earth retaining structures, etc. in excavated trenches of the present invention has an inclined rod of a required length attached to and detachable from the upper end of each support at both ends of a pair of bases, and can be rotated up and down. It can be freely installed, and since the chain is removably tensioned between the lower ends of the opposing inclined rods, it can be set to match the groove width of the excavated trench backfilled on site, making it highly versatile. Get rich.

In addition, the device for extracting earth retaining structures, etc. of the present invention can be used by adjusting the position of the lifting fitting attached to a movable pulley that is suspended from a horizontal rod provided at the intersection of opposing inclined rods, and by adjusting the angle of the inclined rods. Since it can be moved and fixed at any position in the trench width direction, it is possible to easily pull out retaining plates on both sides of the trench or pull out the pillars on both sides in the center of the trench without having to move the pulling device. obtain.

Furthermore, the device for extracting earth retaining structures, etc. of the present invention uses movable pulleys when pulling out the columns and earth retaining plates of the earth retaining structures from the soil with a crane, etc., so it is difficult to use only with a crane due to the large earth pressure resistance. Even if it cannot be pulled out, it can be easily pulled out.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an earth retaining method using an earth retaining structure for trench excavation, Fig. 2 a and b are front and side views of a pulling device for an earth retaining structure, etc. according to the present invention, and Fig. 3 is a perspective view showing an earth retaining method using an earth retaining structure for trench excavation. FIG. 4 is a perspective view showing a state in which the retaining plate is pulled out from the earth, and FIG. 4 is a front view showing a state in which the support column is pulled out from the soil by the pulling device. 1... Excavation groove, 2... Support guide groove,
3... Support column, 3a... Support jack connection member, 4... Support jack, 5...
・・Earth retaining plate, 5a・・・Through hole, 6, 6′・・・・
... Base, 7 ... Support column, 8 ... Tubular holder, 9 ... Slanted rod, 10 ... Set screw, 11 ...・Horizontal rod, 12, 14...
・Guide pipe, 13.15...Set screw, 16
......U-shaped metal fitting, 17...Chain, 1
8...Moving pulley, 18a...Rope, 1
8b... Hanging ring, 19... Hook, 20
...Earth retaining plate lifting fitting, 20a... Hanging rope, 20b... Protrusion, 20c... Rod, 21... Prop lifting fitting, 21a...
... Suspension rope, 21b... Forked metal fitting, 25...
...Sewage pipe, 26...Backfill earth and sand, 27...
... Steel sheet pile, 28 ... Crane suspension rope, 2
9...Hook for a crane's hanging line.

Claims (1)

[Scope of utility model registration request] The bases with columns on both ends are placed opposite to each other, and the upper end of each base column is removably provided with an inclined rod that can freely rotate up and down, and can be moved and fixed at the intersection of the opposing inclined rods on both sides. A horizontal rod is stretched across the frame, a chain is removably tensioned at the lower ends of the opposite inclined rods on both sides, a movable pulley is hung in the center of the horizontal rod, and a hook is attached to the hook of the movable pulley. A device for pulling out earth retaining structures, etc. in excavated trenches, in which lifting fittings such as earth retaining plates are attached alternately.