JPS6120118Y2 - - Google Patents

Description

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

Recently, when excavating trenches for burying water, sewage, gas, etc. pipes, telegraph and telephone cables, power transmission lines, etc., in order to prevent landslides on the side walls of the trench,
As shown in Fig. 1, on the inner wall of the partially excavated trench 1,
Two pillars 3 having guide grooves 2 on both left and right sides are placed facing each other, and a support jack 4 is stretched over a connecting member 3a fixed in front of the pillars 3, and the two connected pillars 3 are erected. One side end of the earth retaining plate 5 is inserted into the guide groove 2 on one side of the facing column 3 and press-fitted into the soil, and then connected to the other side end of this earth retaining plate 5 with a support jack 4. Two pillars facing each other 3
The guide groove 2 on the other side is fitted and the support column 3 is erected, and the assembled earth retaining structure is press-fitted into the soil at the same time as the groove 1 is deeply excavated, and the guide groove 2 of the support column 3 is inserted between the guide grooves 2 and 3. An earth retaining method is used in which the earth retaining plate 5 is fitted and extended upward, and the earth retaining structure is sequentially assembled and connected in accordance with the above-mentioned procedure as the trench is further excavated in the longitudinal direction.

By the way, heavy machinery such as a crane truck was used to erect and pull out the pillars 3 and retaining plates 5 in the earth retaining structure, but recently there has been a lot of construction work in urban areas, and there are many sites with narrow roads. Heavy machinery cannot enter the site. Also, depending on the soil quality, when pulling out the retaining plate 5,
There are problems such as the large earth pressure resistance makes it difficult to pull out even with a crane truck.

The present invention was developed to solve this problem, and it can be transported and assembled in a disassembled state even at narrow sites where heavy machinery cannot enter, and supports and retaining plates can be easily erected and pulled out. To provide a device for erecting and pulling out an earth retaining structure, which can be easily pulled out even when the earth pressure resistance is so large that even a crane truck cannot pull it out easily.

Below, an embodiment of the earth retaining structure erection/extraction device according to the present invention will be explained using figures.
In c, 6 is a portable crane that can be disassembled and assembled, and this crane 6 has pillars 9 with wheels 8 of the same length attached to the front and rear of a plate 7a fixed to the upper surface of both left and right ends of an I-beam 7. The upper ends are removably connected, and a manual winch 10 is removably attached to the lower part of either the front or rear (front in the figure) left and right columns 9, and the lower part of the other (rear in the figure) left or right column 9. A steel cable 10a with one end tied tightly is wound up, and an electric hoist 11 is suspended from the I-beam 7 so as to be freely movable. 11a is an electric hoist 11
This is the operation button.

12 is a pull-out truck, and this pull-out truck 12 is
Supports 15 are erected on a pair of left and right underframes 14 each having wheels 13 at the front and rear ends, and a beam 16 is slidably stretched between the supports 15, so that the required pin holes 16a of the beam 16 are inserted. The pin 15a is inserted into the pin hole (not shown) of the support post 15, and after positioning, the support plate 1 is attached to the handle nut 18 via the holding plate 17.
5 is tightened and fixed.

A fulcrum column 19 is slidable on the beam 16 and is tightened and fixed with a handle nut 18 via a presser plate 17, and one end of a pull-out screw 20 is attached to the upper end of the fulcrum column 19. It is rotatably supported and rotatably supported in the vertical direction to serve as a fulcrum A, and a suspension rope 22 is attached to the other end of the extraction lever 20, which connects the hook 1 of the electric hoist 11.
The hanging cable 22 at the other end of the pull-out lever 20 is suspended from 1b.
The mounting part of is the point of emphasis B, and the pull-out screw 20
An earth retaining board lifting fitting 23 is placed on the middle lower side near the fulcrum A.
Alternatively, the support strut lifting fitting 23' is suspended, and this portion serves as the point of action C. Earth retaining board lifting fittings 23
A rod 23c with a protrusion 23b is inserted and locked into the through hole 5a on the upper edge of the retaining plate 5 at the lower end of the two hanging ropes 23a.
This is the one with the . The column lifting fitting 23' has a two-pronged metal fitting 23d attached to the lower ends of the two hanging ropes 23a, 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.

The method of using the device for erecting and pulling out the earth retaining structure according to the present invention will be explained. For example, when constructing and connecting an earth retaining structure to a trench 1 that has been excavated as shown in Figure 1 in order to install a sewer pipe at a site with narrow roads in an urban area, the trench 1 as shown in Figure 3 Steel sheet piles 25 are laid in parallel on both left and right outer edges of the steel sheet piles 25, and the portable crane 6 of the earth retaining structure erecting/extracting device according to the present invention, which has been disassembled and brought in, is assembled thereon. That is, each steel sheet pile 25 is used as a rail, and struts 9 with wheels 8 are disposed on the rails, respectively, and the upper ends thereof are arranged in front and behind the plate 7a on the upper surface of both left and right ends of the I-beam 7, which is disposed across the groove 1. combine,
Next, an electric hoist 11 is suspended from the I-beam 7 in a movable manner within the groove 1, and then a manual winch 10 is attached to the lower portions of the front left and right columns 9, and one end of the steel cable 10a is attached to the lower portion of the rear column 9. To be tied up. Next, the other end of each steel cable 10a is wound around the manual winch 10 to gradually raise the prop 9 which has fallen down, and the distance between the front and rear props 9 is narrowed. When the I-beam 7 reaches the required level, the manual winch 10 stops winding.

Portable crane 6 assembled in this way
The electric hoist 1 moves on the rail of the steel sheet pile 25 until it reaches the position where the support 3 is to be erected, and then stops.
1 by operating the operation button 11a of the electric hoist 1.
1 is moved to the outside of the groove 1, and the opposing 2 is connected by a support jack 4 that is brought in and placed here.
The book support 3 is attached to the hook 11 of the electric hoist 11 in advance.
It is hoisted up by the prop lifting fitting 23' attached to b and moved, and is erected at a predetermined position on the inner wall of the groove 1.
Next, remove the column lifting fitting 23' from the hook 11b of the electric hoist 11, and remove the earth retaining plate lifting fitting 23'.
, and operate the electric hoist 11 again to remove the rod 2 with the two protrusions 23b of the retaining plate lifting fitting 23.
3c is inserted into the through hole 5a at the upper edge of the earth retaining plate 5 which has been carried in and placed on the outside of the groove 1, and is lifted up. Fits into the guide groove 2. Similarly, the retaining plate 5 is lifted up and one end of the retaining plate 5 is fitted into the guide groove 2 on one side of the other support column 3. Next, the next opposite column 3 to be connected by the support jack 4 is lifted up by the electric hoist 11, and the guide groove 2 on the other side of each column 3 is fitted into the other end of the retaining plate 5, and the column is Build 3.

Thereafter, this assembled earth retaining structure is press-fitted into the soil at the same time as the groove 1 is excavated, and the earth retaining plate 5 is fitted between the guide grooves 2 of the pillars 3 to extend it upward, and the groove is further extended in the longitudinal direction. While excavating, the portable crane 6 is moved on the rails of the steel sheet piles 25, and the electric hoists 11 are used to erect the columns 3 and retaining plates 5 one after another according to the above procedure to assemble and connect the retaining structures.

However, a sewer pipe 26 is installed in the excavated trench 1 as shown in FIG.
After laying the soil and backfilling the trench 1 with earth and sand 27, when pulling out the pillars 3 and retaining plates 5, use the electric hoist 11.
Since it cannot be pulled out due to earth pressure resistance, the pull-out cart 12 of the earth retaining structure erecting and extracting device according to the present invention, which has been disassembled and brought to the site, is assembled. That is,
An underframe 14 having wheels 13 at the front and rear ends is placed on the rail of each steel sheet pile 25 at the rear of the portable crane 6.
A beam 16 is placed between the supports 15 on both underframes 14.
is stretched, the required pin holes 16a are aligned with the pin holes (not shown) in the support column 15, the pins 15a are inserted and positioned, and the handle nuts 18 are tightened and fixed via the holding plate 17. Next, a fulcrum column 19 is placed at a required position on the beam 16, and is tightened and fixed with a handle nut 18 via a presser plate 17. Next, fulcrum pillar 1
One end of the extraction lever 20 is rotatably supported at the upper end of 9 and rotatably supported in the vertical direction to serve as a fulcrum A, and the suspension rope 22 at the other end is suspended from the hook 11b of the electric hoist 11 to form the extraction lever. The other end is the point of effort B, and the earth retaining plate lifting fitting 2 is placed on the middle lower side near the fulcrum A.
3 is suspended to form the point of action C.

In order to pull out the earth retaining plate 5 using the earth retaining structure erection/extracting device according to the present invention, which is comprised of the pull-out cart 12 assembled in this way and the portable crane 6 assembled previously, the earth retaining plate 5 is to be pulled out at the position where earth and sand 27 has been backfilled. Then, the device is moved and stopped, and then the rod 23c with the two protrusions 23b of the retaining plate lifting fitting 23 is inserted into the through hole 5 at the upper edge of the retaining plate 5 embedded in the earth and sand 27.
Insert and lock into a. Next, as shown in FIG. 5, the operation button 11a of the electric hoist 11 is operated to pull up the force point B at the other end of the extraction lever 20 via the hanging rope 22 suspended from the hook 11b, and Earth retaining plate lifting fitting 2 at the point of action C on the side
The earth retaining board 5 connected to 3 is pulled out from the soil. Once it has been pulled out several tens of centimeters, remove the pull-out lever 20, move the pull-out trolley 13 backwards, move the portable crane 13 back to the required position, and move the electric hoist 11 above the retaining plate 5 to remove the hook. 11b with the retaining plate lifting fitting 23, and the movable hoist 11 completely pulls out the retaining plate 5 from the soil.

In order to pull out the support column 3, the earth retaining board lifting fitting 23 located at the middle lower side of the pull-out lever 20 is removed and a support lifting fitting 23' shown in FIG. 2 is attached. Then, the portable crane 6 and the pull-out cart 12 are moved to a required position and stopped, the handle nut 18 of the fulcrum column 19 of the pull-out screw 20 is loosened, and the handle nut 18 is slid on the beam 16, and the handle nut 18 is tightened at the required position. Secure by tightening. Next, as shown in FIG.
is pin-coupled to the upper end of the support jack connecting member 3a on the front side of the opposing support column 3. After that, the operation button 11a of the electric hoist 11 is operated to remove the extraction lever 20 suspended from the hook 11b by the hanging rope 22.
The force point B at the other end is pulled up, and the support jack 4 is attached to the opposing column 3 connected to the column lifting fitting 23' at the point of application C at the middle lower side of the pull-out lever 20.
Pull it out of the soil while still connected. number
Once it has been pulled out by 10 cm, remove the pull-out lever 20, move the pull-out trolley 13 backward, move the portable crane 6 back to the required position, and attach the support bracket 2 to the hook 11b of the electric hoist 11.
3', and the electric hoist 11 completely pulls out the opposing support columns 3 from the soil.

As can be seen from the above explanation, the device for erecting and pulling out earth retaining structures in excavated trenches according to the present invention can be disassembled and transported to the site, and can be easily assembled on site to match the width of the excavated trench. Because of this, it is possible to erect earth retaining structures in excavated trenches even on narrow sites where heavy machinery cannot enter.
It can be easily pulled out from the backfilled earth and sand after installing the sewer pipe.

In addition, the earth retaining structure erection/extracting device of the present invention uses an electric hoist to pull out the earth retaining structure columns and retaining plates from the soil using a pull-out lever that can move left, right, front, and back. , it can be easily pulled out even in cases where the earth pressure resistance is so great that even a crane truck cannot pull it out easily.

Furthermore, the pull-out trolley in the earth retaining structure erection/removal device of the present invention can be used even at sites where crane trucks can be used, when the earth pressure resistance is large and the supports and retaining plates of the earth retaining structure cannot be easily pulled out. By using both together, you can easily pull out the pillars and retaining plates.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the earth retaining method using an earth retaining structure for trench excavation; Fig. 2 a, b, and c are front views, side views, and plan views of the earth retaining structure erecting/extracting device according to the present invention; Fig. 3; Figure 4 is a perspective view of a portable crane in the erecting/extracting device for an earth retaining structure according to the present invention, which is assembled across an excavation trench, and Figure 4 shows a pull-out cart assembled behind the portable crane and connected to the electric winch of the portable crane. FIG. 5 is a perspective view of the device for erecting and pulling out earth retaining structures according to the present invention; FIG.
The figure is a front view showing a state in which the support column is pulled out by this 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...Portable crane, 7...I-shaped steel,
8...Wheel, 9...Strut, 10...Manual winch, 10a...Steel cable, 11...Electric hoist, 1
1a...Electric hoist operation button, 11b...
Hook, 12... Pull-out trolley, 13... Wheels, 1
4... Underframe, 15... Support, 16... Beam, 17...
... Pressing plate, 18 ... Handle nut, 19 ... Fulcrum column, 20 ... Pulling lever, 22 ... Suspension rope, 23
...Earth retaining board lifting metal fitting, 23'... Prop lifting metal fitting, 23a... Suspension rope, 23b... Protrusion, 23c...
...rod, 23d...two-pronged metal fitting, 25...steel sheet pile, 26...sewer pipe, 27...earth and sand, A...fulcrum, B...point of force, C...point of action.

Claims (1)

[Scope of Claim for Utility Model Registration] The upper ends of four wheeled columns on the front, rear, left and right sides are removably connected to the upper edges of both left and right ends of the I-beam, and an electric hoist is suspended from the I-beam so that it can run. A manual winch was removably attached to the bottom of one of the left and right front and rear columns, one end of the steel cable was detachably attached to the bottom of the other column, and the other end was wound around the manual winch. A portable crane and supports are erected on a pair of left and right underframes with wheels at the front and rear ends, and a beam is removably and slidably stretched between the left and right supports. A fulcrum column is slidably attached and tightened, one end of a pull-out screw is removably pivoted to the upper end of the fulcrum column, and the other end of the pull-out screw is detachably suspended from an electric hoist. A device for erecting and extracting an earth retaining structure in an excavated trench, consisting of a pull-out cart with the necessary lifting fittings removably suspended from the intermediate lower side near one end of the pull-out screw.