JP2004124670A - Preloading panel type earth retaining - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a preloading panel type earth retaining which is implemented by supporting panel members by struts, wherein the struts are resistant to contraction in a compressive direction and expandable in an expanding direction but restrained by a stopper when expanded to the maximum, and wherein hydraulic pressure or air pressure is applied to the struts to pressurize a mud wall via the panel members and apply a preload to the mud wall, thereby improving working efficiency, saving labor, and ensuring the security of workers. <P>SOLUTION: The preloading panel type earth retaining is implemented by providing a pair of the panel members 1, the struts 3 supporting an interval between the panel members 1, brackets 2 connecting the panel members 1 and each strut 3, and a hydraulic jack 4. The strut 3 has a slot 5 formed in the entire area of its joint portion, and each bracket 2 has a bracket pin hole 6 formed therein, to thereby connect each panel member 1 to each end of the strut 3. The panel member 1 is fixed to the bracket 2 by a strut mounting pin 9, and the strut 3 is prevented from slipping out of the bracket 2 by inserting a pin 7 into a joint portion, and by attaching a lock ring 8. In this manner, components for the panel type earth retaining is assembled. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a shoring support using panel shoring.
[0002]
Conventionally, to prevent the collapse of the ground, a pair of panel members with two or more cut-outs are hung in a trench pre-drilled by about 0.5 m and excavated in a box-shaped inside. There is a method in which the panel is pushed in, this operation is repeated, the panel member is sunk to a predetermined position, and soil is retained.
[Problems to be solved by the invention]
[0003]
This method is usually a box system in which cut-outs are directly attached to the vertical beams on both sides of the panel member, and a vertical slide rail that is formed into a ladder by a plurality of cuts at a certain distance. There is a slide rail system in which two sets are assembled and a panel member is fitted between the slide rails to form a box.
[0004]
Regardless of the box method or the slide rail method, the excavation and pushing of the panel members are performed while repeating to a predetermined depth, so that the earth wall on the side of the excavation collapses and a gap between the earth wall and the panel members Occurs.
[0005]
In order to prevent this, after excavation is completed, earth and sand are put between the panel member and the earth wall (this is called backfilling), but the gap is closed, but since it can not be compacted, it is left for a long time, If it rains or large vehicles pass around the excavation trench, cracks may occur on the road surface, the gap between the curb and the gutter of the road may open, the wall may be inclined, and some adverse effects may occur. Was.
[0006]
By the way, conventionally, the cutout supporting between the pair of panel members is either a fixed type whose length cannot be adjusted or a type which can be adjusted by a screw method, but even in the case of a screw type, It merely had an adjustment function to adjust the panel members to a predetermined excavation width on the ground, and there was no axial force to push back the earth wall, and it was impossible to prevent the above-mentioned problems from occurring. .
[0007]
Further, in a site where the soil density is high and a strong earth pressure is applied, a large load is applied to the cut through the panel member, and it may be difficult to turn the screw of the cut.
[0008]
In addition, in the above-mentioned site, when removing the panel retaining material, a strong earth pressure is applied to the panel member surface, and it is very difficult to pull out the panel member. At this time, the cutout may bend.
[0009]
The present invention has been made in view of the above circumstances, and in a panel retaining device directly supported by a cut-out panel member or directly through a slide rail, a cylinder member presses a panel member, thereby preloading an earth wall. It is an object of the present invention to provide a soil retaining structure with high safety, while preventing secondary adverse effects on the site and improving work efficiency.
[0010]
[Means for Solving the Problems]
The following precautions are taken for the preloaded panel retaining device of the present invention so that the above-mentioned adverse effects do not appear around the site during the operation and the removal is facilitated.
[0011]
That is, the panel member directly or via the slide rail, in the panel retaining that is supported by the cut, the cut that supports the panel member, stops shrinking in the compression direction, is free to expand only in the extension direction, It has a function that a stopper acts at the time of maximum extension, and in addition, a cylinder that expands and contracts due to hydraulic pressure or air pressure is appropriately installed along with the notch, and hydraulic pressure or air pressure is injected into the cylinder by a pressure device. The preload is applied to the earth wall by pressing the earth wall via the panel member.
[Action]
[0012]
The preload type panel retaining device according to the present invention is characterized in that a cut hole for supporting a panel member and a slide rail is provided with an elongated hole in a part or the whole of a joint portion thereof, and is joined by a pin. The end surface of the elongation stops reducing, and in the elongation direction, the elongation is free within the range of the elongate hole, and the elongation is stopped by the end of the elongate hole and the pin.
[0013]
The panel soil is carried into the excavation trench, and a cylinder which expands and contracts by hydraulic pressure or air pressure is appropriately provided along with the cutting edge, and a liquid pressure or air pressure is injected into the cylinder by a pressurizing device, and the panel member is removed. When pressurized, the panel members can be stretched and pre-loaded on the earth wall within the slots.
BEST MODE FOR CARRYING OUT THE INVENTION
[0014]
The preload type panel retaining device of the present invention will be described below with reference to FIG. 1, but it is needless to say that the present invention is not limited to the specific configuration of the present embodiment.
[0015]
As shown in an installation front view of Drawing 1, a preload type panel retaining device according to one embodiment of the present invention includes a pair of panel members 1, a bracket 2 for connecting panel members 1, and a cutout 3, and a panel member 1. It is composed of upper and lower two notches 3 for supporting the space, and a hydraulic jack 4.
[0016]
Then, the slit 3 is provided with a long hole 5 at all of the two joints thereof, the bracket 2 is provided with a bracket pin hole 6, and the panel member 1 and both ends of the cut 3 are connected via the bracket 2. Join.
[0017]
The panel member 1 and the bracket 2 are fixed with a cutout mounting pin 9, and the bracket 2 and the cutout 3 are inserted with the pin 7 from above, and the pin 7 is prevented from coming off with the lock ring 8, and the panel soil is fixed. Assembly is completed.
[0018]
The panel retaining device 9 assembled as described above is carried into the excavation site, and is dropped by a crane, a backhoe, or the like into an excavation trench that has been pre-excavated by about 0.5 m.
[0019]
In the compression direction, the end face of the cut 3 stops shrinking, and in the extension direction, the cut 3 of the panel soil 9 can be freely extended in the range of each of the long holes 5, and the fall of the long hole 5 is prevented. The extension is stopped by the end and the pin 7.
[0020]
In this excavation work, since the excavation and the pushing of the panel member 1 are repeatedly performed to a predetermined depth, the soil wall on the excavation side collapses, and a gap is generated between the panel member 1 and the earth wall.
[0021]
Therefore, after excavation is completed, earth and sand are put between the panel member 1 and the earth wall and backfilling is performed. In order to compact the earth, a hydraulic jack 4 is appropriately set near the installation of the existing cutting wall 3. The jack 4 is pressurized by a hand pump as a pressurizing device.
[0022]
At this time, the existing notch 3 also extends within the range of each of the long holes 5, so that the width between the panel members 1 of the panel retaining 15 can be increased within this range.
[0023]
The above work preloads the earth wall and eliminates the fear of adverse effects on structures around the excavation trench.
[0024]
After performing necessary work such as piping in the excavation trench, when the pressure of the hydraulic jack 4 is released and the hydraulic jack 4 is reduced, the notch 3 is also reduced in the same manner, and the gap between the panel members 1 of the panel retaining 9 is obtained. The width also shrinks.
[0025]
The excavation trench is backfilled sequentially while the panel soil 15 is lifted from the excavation trench without applying earth pressure, and the earth and sand is compacted, and the operation is completed.
[0026]
In addition, there is a case where a large-diameter pipe is laid as a use method different from the above-described embodiment.
[0027]
As shown in FIG. 1, when the large-diameter pipe 12 is laid, the lowermost notch 3 is in the way and must be removed.
[0028]
In such a site, the hydraulic jack 4 is installed at a predetermined height above the installation position of the lowermost cutting beam 3, and the dumping bottom 13 is installed on the bottom of the excavation. The hydraulic jack 4 is pressurized by a hand pump as a device, the cutout mounting pin 9 is pulled out, and the lowermost cutout 3 is removed.
[0029]
According to the above method, the large-diameter pipe 12 exceeding the lowermost position can also be laid easily.
【The invention's effect】
[0030]
In the present invention, since a pair of panels is pressed by a few hydraulic jacks (whether hydraulic or hydraulic) or a gas cylinder (air cylinder) with a strong axial force, the backfill material is Even if it is pushed firmly and left for a long time, it rains, or a large car passes around the excavation trench, cracks may occur on the road surface, the gap between the curb of the road and the gutter will open, There is no secondary adverse effect such as inclination.
[0031]
In addition, in this method, since long holes are provided at each joint of the existing burrs, if the excavation width is secured in a compressed state, the length does not become shorter than the dimensions.
[0032]
When preloading the earth wall, the space between the panels is expanded, but expanded by the length of the slit and the backfill is pressed.
[0033]
The expansion work of the screw-type cutting wall must be performed while entering the excavation trench, but according to the present invention, since the expansion operation of the jack connects the pump and the hydraulic jack with a hose, the operation of the pump is grounded. It is safe to do.
[0034]
In addition, when removing the panel soil, the pressure of the hydraulic jack is released, so that the space between the panel members is reduced, and the panel soil can be easily lifted to the ground.
[0035]
Therefore, according to the present invention, improvement of work efficiency and labor saving and safety of workers are ensured.
[Brief description of the drawings]
FIG. 1 is an installation front view of the present invention. FIG. 2 is a box type panel retaining device. FIG. 3 is a slide rail type panel retaining device.
1 Panel member 2 Bracket 3 Cut-out (The lower cut-out is the same structure as the upper cut-out, and the cut-out drawing is omitted.)
4 ... Hydraulic jack 5 ... Elongated hole 6 ... Bracket pin hole 7 ... Pin 8 ... Lock ring 9 ... Shear mounting pin 10 ... Jack mounting bracket 11 ... Jack mounting pin 12 ... Large diameter pipe 13 ... Discard 14 ... Guide rail 15 … Panel domes 16… Backfill 17… Soil walls

Claims (1)

In panel soil retaining where the panel member is directly or through a vertical slide rail, the panel member supports the panel member, the stop of the panel member stops shrinking in the compression direction, and is free to expand only in the extension direction. , Has a function that a stopper acts at the time of maximum extension, and additionally, a cylinder that expands and contracts by hydraulic pressure or air pressure is appropriately provided along with the notch, and hydraulic pressure or air pressure is injected into the cylinder by a pressurizing device. And a preload applied to the earth wall by pressing the earth wall through the panel member.

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