JPS6073914A - Sheathing device - Google Patents

Abstract

PURPOSE:To perform safe and efficient sheathing, by a method wherein, a strut, having its opposite ends pivotally secured to panel, is arranged between panels positioned opposite to each other, and leaf springs, which restrict relative rotary displacement between the strut and the panels, are provided. CONSTITUTION:When the top ends of panels 2a and 2b, positioned opposite to each other, are pressed against a ground, when, for example, the panel 2b is about to sink deeply, such force is transferred to a strut 4a through a lower mounting member 3b mounted to the panel 2b. Although the strut 4a exerts its force to yield a relative displacement between the panels 2a and 2b, the relative displacement is adsorbed by halves through the elasticity of leaf springs 9b1 and Oa2, and the relative displacement is limited to an angle Q which is within a safety limit. Further, when the panels 2a and 2b are to be pulled off from a ground, pins for 4 leaf springs 9a1, 9b2, 9c1, and 9d2 are removed, and such pulling-off takes place in a condition that the panels 2a and 2b and the strut 4a are folded up.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an earth retaining device used for civil engineering construction work such as trench excavation.

Earth retaining is required for trench excavation work for underground construction of water and sewerage pipes, electrical conduit pipes, gas pipes, etc. When the excavation trench is relatively shallow or there are many cross pipes or branch pipes, conventional earth retaining equipment is difficult to handle or is not suitable for use. There is a need for the development of an earth retaining device that is easy to use and that allows for easy and reliable earth retaining and safe construction even in lateral IIi pipes and branch pipes.

This invention was made in view of the above circumstances, and provides an earth retaining device that is easy to build up, pull out, transport, and manage, and can also easily retain earth at cross pipes and branch pipes. 1'.

Corresponding to this purpose, the earth retaining device of the present invention has two opposing
a plurality of parallel earth retaining panels, one end of which is pivotally connected to one said panel at a pivot point and the other end pivoted to the other said panel;
a plurality of struts that are pivotally connected to each other and located parallel to each other; and a stop of at least one of the struts and the panel, the struts being pivotally connected to each other at the ends of the struts; The present invention is characterized in that it includes a tilt angle limiting device having a leaf spring that can be restrained by elastic force.

The details of this invention will be explained below with reference to the drawings showing one embodiment.

In FIGS. 1, 2, and 3, 1 is an earth retaining device, which includes two lower panels 2a12b and four lower mounting parts U3.
a, 3b, 3C, 3d and four lower struts 4a, 4b, 4c, 4d, and two upper panels 5a, 5b. The two upper panels 5
a , 51) is the connecting fitting 8 a z 8 b , 8
It is constructed so that it can be freely connected and detached by means of c and 8 d.

First, the configuration of the lower retaining unit 10 will be described.

The lower panels 2a, 2b are placed opposite and parallel to each side of the excavated trench. T part number member 3a
, 3c are fixed to the inner surface of the -I section panel 2a at intervals in the width direction of the panel (in the direction of the length of the groove).

On the other hand, the lower mounting members 311.3d are fixed to the inner surface of the lower panel 2b at intervals in the width direction of the panel.

Lower part (=1) Members 3a, 3b, 3c and 3d each have a shape with an edge extending horizontally to the upper end of the U'':f groove with a slight width outward. '4J, respectively, the spacing between the mounting members 3a and 30 is equal to the spacing between the lower mounting members 31) and 3d.
.

3C and 3d are facing each other. Lower strut 4
One end of a is the lower mounting member 3a, and the other end is the member 3 with number 1.
1) are pivoted to -C via the bin 21 at the same height position near the upper end of each mounting member, and on the other hand,
The struts 4b have one end pivotally connected to the lower mounting member 3C and the other end to the lower mounting member 3d, and the two struts 4. a, 4
b are located at the same height and parallel to each other. strut 4
cl is located below the stop 48 in parallel with the strut 1-4a, both ends of the strut 4a pivot on the lower mounting members 3a and 3b, respectively, and the strut 1-4d is below the strut 41'l and parallel to the strut 4b. Both ends of the strut 4d are pivotally connected to lower mounting members 3c and 3d, respectively. Struts 4c and 46 are located at the same height, and their position is 4c when the panel is vertically inserted.
, 4d is a position where a space can be secured for passing underground pipes, etc.

As shown in FIG. 4, the strut 48 is made up of end receivers 41, 42 at the left and right ends and screw shirts 1 to 43. The tip receiver 41 includes a tip fitting 44 located at the tip and a leg portion 45'b) connected to the rear end. Leg portion 45
Both the screw shirt 1-43 and the screw shirt 1-43 are hollow, and a shaft 46 is inserted between them, and the shaft 46 and the leg portion 45 are connected by a pin 47, and an annular groove 48 is formed at the tip of the shaft 46. A through pin 49 fixed to the screw shaft 43 is inserted into this annular hole 48, and the VX-C shaft 46 and the through pin 49, that is, the screw shaft 43, are structured to allow relative rotation. By replacing the shaft 46 with one of a different length, the relative axial position of the leg portion 45 of the tip receiver 41 and the screw I-71-43 can be changed, thereby making it possible to change the groove. The length of the lower strut 4.a can be roughly adjusted according to the width of the lower strut 4. It is screwed into the female thread formed inside the 50.Therefore, there is a step 1 (J to rotate 71-43, step 1):
Since the L-shaft 43 and the threaded portion of the leg portion 50 of the other tip holder 42 are engaged with each other, relative displacement b' vl is accommodated in the axial direction, so the length of the strut 1 is adjusted according to the change in the width of the groove. You can fine-tune the value.

One leaf spring is attached to the lower mounting member at the upper and lower positions of the respective pivot joints of the lower struts 4a and 41). That is, the lower mounting member 3a and the struts 1-4
a (1 plate spring 9al on the upper side of the fitting part, plate spring 9 on the lower side)
a2, leaf spring 9 old on the upper side of the pivot joint between the lower mounting member 3m and strut 4a, leaf spring 9b2 on the lower side, mounting part +A3c
and stock 1 to 4b of 4 (plate spring 9c above gunj part)
l, a leaf spring 9c2 is attached to the lower side, and a plate spring 9dl is attached to the upper side of the pivot point of the strut 4b, and eight sub-plate springs 9d2 are attached to the lower side, and the above-mentioned At least 9al, 91) 2.9c1 of the 8 leaf springs
and 9 (4 of 12, or 2 of 9a2.9b1.9,
and 4 pieces of 9dl are attached to the pins so that the volumes 21112 can be attached.

Each of the eight leaf springs restrains the relative rotational displacement of each of the mounting members and each of the struts, which are in contact with each other at both ends thereof, by a resilient L force, and has a strength of 4rI. Springs 9a1.91) 2.9c1 and 9d2 cooperate to limit the elevation angle of the relative rotational displacement of the two struts I-, 4a, 4b in a positive direction with respect to their centers of rotation.
, 4 plates C:) a2.9b1.9c2 and 9(1
1 cooperates: two struts 4a, 4. f+ forms a device for limiting the inclination of the relative rotational displacement J in the angular direction with respect to its center of rotation. In addition, the upper panels 5a and 5b
has the same thickness and width as the bottom panel, and has a lower height than the bottom panel.

How to use this earth retaining device configured with J)?
Connect the upper panels 5a and 5b to the lower retaining unit and the connecting fittings at a depth of +1, or use only the lower retaining unit 1- and place it in the excavated trench in the assembled position. stomach. Since it is a stand-alone type, it is good to have 16 keys one after another, but! %7 If the bottom is uneven and you want to embed it by pressing from above, press right panel 5a (or 2a
) and the upper ends of left panel 5b (or 21)) should be pressed evenly so that there is as little difference in height between the left and right sides as possible, but depending on the amount of force applied and the difference in soil quality, the way the left and right panels sink may vary. Even in different cases, the action of the inclination limiting device prevents damage to the earth retaining device, as shown in Figure 5-J:
In other words, if a large force is applied to the panel 211 (5b) and the panel 21) attempts to sink significantly, half of this force will be applied to the strut 4a via the lower mounting member 3b that has been attached to the panel 2b. and the relative displacement between the stocks 1 to 4a (the struts 1 to 4a and the panel 21 at the pivot point to the J member 3b), and the strain at the pivot point M of the strut 4a to the attachment member 3a. Attempts are made to cause relative displacement between the panel 4a and the panel 2a at the same time, but the two leaf springs 9b1
and 9a2, the relative displacement remains at an angle θ within the safety limit of the tilt angle limiting device, and the remaining half of the force applied to the panel 2b is absorbed by the strut h4.
b, and is absorbed by 1/2 by the elasticity of leaf springs 9dl and 9c2, and the relative change (N/
This is because θ also remains at the above-mentioned θ.

Due to the action of such an inclination angle limiting device, even if, for example, an earthen wall on one side of the trench collapses, the earth retaining action is fulfilled, and therefore construction work can proceed safely.

The 1 x 1 corner limiter can also be used to the right when pulling out earth retaining equipment after pipe installation. To pull out the panels, a soil hoop, etc. is attached to the left and right panels, and a crane or other equipment is used to lift them up.
The earth pressure from pressing down and burying it in the soil is mainly applied from the outside. Therefore, by removing the wire rope Japanese hanging rings hung from the left and right panels, etc., we created a difference of 3 arg between the actual lengths of the left and right L'' loops, and then pulled the wire A70-wave upwards. The panel with the shorter actual length of the lobe is likely to be relatively shifted upwards than the other panel, but here, the action of the 11n angle limiter causes the struts 1-4 to
8.4b maintains a state rotated by a certain angle φ from the horizontal, so the gap between the two opposing panels becomes narrower, and the earth pressure from the outside decreases significantly, making it possible to reduce the pulling force. Since the pulled out retaining device P''11 can be placed directly into the trench to be dug, work efficiency is significantly improved.

Also four 4 anti-springs 9al, 91) 2.9c1 and 9d
2 by removing the bin and removing panel 5b (
When pulling 2b) upward, the lower slides 1 to 4
The inclination angles of a and 4b are not limited and are close to 90", so that the earth retaining position 1 is in the state of J, uni, and 1 burr lυ shown in Figure 7. At this time, the left and right panels have a radius of rotation. The valve is placed in a vertical position, with the lower stock being placed vertically.It is possible to store or transport the sleeper 30 in a horizontal position after being folded. They can be placed in the gap created by the misalignment of the left and right panels, stacked one on top of the other in a stable manner, and placed on the bed of a truck for transportation or on the floor of a warehouse for storage.

At this time, if you set up a storage place for the removed bottle somewhere else on the earth retaining device, such as on the mounting member, the bottle will not be lost and can be used immediately when needed. (Dotted line in Figure 8) The earth retaining device of the present invention can be used alone, but if you want to connect and use several earth retaining devices depending on soil conditions, use a connecting rail 11 with a T1-shaped cross section as shown in Figure 9. be able to.

In addition, at the locations of cross pipes and branch pipes, sheet piles are used without using this earth retaining device, but the raised beams 13 that support the sheet piles 12
can be installed by joining the pin 14 to a connecting rail 11' fitted to the end of a panel of a conventional earth retaining device at the boundary with the earth retaining device.

Width 1g1N, the earth retaining width at the branch pipe location, and therefore the length of the 'C-belt beam, are determined by the thickness of the branch pipe and the irregular protrusion of the earth retaining panel at the point corresponding to the normal earth retaining unit. , is not constant, so if half of the length unit of the restoring beam appears,
The belly/raiser beam cut to a length corresponding to half of that length was cut into the 9th piece.
It can be connected using the lifting beam connection pieces 14 and 14' shown in Fig. Since it can be done in the shade, it is safe against earth pressure, and the depth of the sheet pile can be freely determined according to the depth of the branch ore and horizontal 11i pipe, so it can be used in place of conventional cross pipes and branch pipes. The problem of retaining earth will be solved.

J: Uni The earth retaining mechanism 1α of this invention is easy to use when the excavation trench is relatively shallow, and is easy to use at cross pipes and branch pipes.
This will enable reliable earth retention and safe construction.

[Brief explanation of drawings]

FIG. 1 shows a front view of an earth retaining device according to an embodiment of the present invention, FIG. 2 is a side view of the earth retaining device shown in FIG. 1, and FIG. 3 is a plan view of the earth retaining device shown in FIG. 1. , Fig. 4 is an enlarged explanatory diagram of the inclination angle limiting device of the earth retaining device not shown in Fig. 1, and Fig.
Operation of the tilt angle limiting device shown in the figure (explanatory diagram showing how many sides, No. 6
The figure is a plan view of the inclination limiting device shown in Fig. 4, Fig. 7 is a front view of the earth retaining device shown in Fig. 1 in a folded state with the upper panel removed, and Fig. 8 is a plan view of the lower strut shown in Fig. 7. 1- is an enlarged view showing the state of the leaf spring, Fig. 9 is a plan view of the panel connection column, Fig. 10 is a plan view showing the earth retaining device at the cross pipe/branch pipe location, and Fig. 11 is the plan view of the panel connection column. 1, 1...Earth retaining device 2a which is a cross-sectional explanatory diagram of a descending and rising beam connection part
12b...Lower panel 3a, 3b, 3c, 3d-lower mounting member 4a, 41), 4G,, 4d-, lower strut 5a15b-1 part panel 9a1.9a2.
9b1.9b2.9c1.9c2.9dl, 9d2...
・Plate spring 10...lower retaining unit 1~

Claims (1)

[Claims] (1) Two parallel earth retaining panels facing each other, one end of which is pivotally connected to one of the panels at the pivot joint, and the other end of the other panel is pivotally connected to the other panel at the pivot joint. Provided between a plurality of struts located parallel to each other and between at least one of the struts and the panel, the relative rotational displacement between the strut and the panel is restrained by an elastic force. (2) The earth retaining device is characterized in that it is equipped with an inclination limiting device having a leaf spring to obtain the earth retaining device (2). Claim 1, wherein at least one set of the plurality of leaf springs located symmetrically with respect to the center of rotation of the rotational displacement of the slat is detachably attached to the panel. Earth retaining device described