JPH10114945A - Simplified earth-retaining device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use the constituting parts of a simplified earth-retaining device of both slide rail type and box type, in common, by forming flat the side endface of an earth-retaining board and forming projections at the column side and forming vertical beams in which struts can be attached, in the columns and the earth-retaining board. SOLUTION: The side endface of an earth-retaining board 40 constituting an earth-retaining device is made flat. A plurality of vertical beams 42 are provided at the inside of the earth-retaining board 40. The vertical beams 42 function as not only a reinforcing member of the earth-retaining board 40 and jut also a fitting member of a strut 20. Guide grooves 11, 11 with a C-shaped section in which the side of the earth-retaining board 40 can be fitted at both sides of the column 10, are continuously formed. A vertical beam 12 for fitting a strut is provided at the other side face of the column 10. And further, projections 15, 15 having a chevron-shaped or a semicircular section are provided along the longitudinal direction of the column 10 at the side face in the guide groove 11. In this way, the constituting parts of an earth-retaining device of both slide rail type and box type can be used in common.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple earth retaining device.

[0002]

2. Description of the Related Art There is known a method of laying a buried object such as a water and sewage pipe, a gas pipe or a telephone line while cutting and digging using a simple earth retaining device. In addition, this type of simple earth retaining device is as follows.
There are types.

One of them is a ladder-type frame having a plurality of cross beams laid between a pair of columns in a multi-stage manner, and fitted into guide grooves formed vertically on both sides of each column. An apparatus consisting of a panel-shaped retaining plate, a set of frames is erected in a groove excavated in advance, and then two retaining plates are fitted to the frame, and then the other frames are attached to the left and right retaining plates. This is called a “slide rail type simple retaining device”, in which the frame body and the retaining plate are sunk to a predetermined depth and provided for retaining while excavating the inside of the retaining plate while being fitted into the plate.

[0004] The other is a device constituted by stacking a plurality of boxes each having a pair of left and right earth retaining plates having a pair of left and right retaining plates spanned between both ends thereof, and sunk or extracted in units of box assemblies. This is called a so-called “box-type simple earth retaining device”. The box type differs from the slide rail type in that no pillars are used and the side end faces of the earth retaining plate are directly in contact with each other.

[0005]

It is desired that the members constituting the simple retaining device of the slide rail type and the box type be shared, but the sharing is hindered for the following reasons. <A> In the slide rail type simple earth retaining device, as shown in FIG. 8, the sliding resistance of the fitting portion between the guide groove b of the pillar a and the earth retaining plate c is reduced, and the earth retaining plate c with respect to the pillar a is reduced.
The protrusions d are provided on both side end surfaces of the earth retaining plate c for the purpose of imparting the degree of freedom of horizontal rotation. Therefore, when trying to use the slide rail type earth retaining plate d in the box type,
As shown in FIG. 9, a gap is formed between the protrusions d, d of the butted earth retaining plates c, c, so that earth and sand easily flow in, and the earth retaining plate c cannot be shared. <B> As shown in FIG. 8, the slide rail type cutting beam e is configured to be fitted in a C-shaped receiving groove f formed in the column a to allow mutual sliding. On the other hand, the box-type cutting beam has a structure firmly fixed to the earth retaining plate. For this reason, it is not possible at the present time to also use the cutting beam. <C> Since it is difficult to use the same member for the above-mentioned reasons, the slide rail type and the box type simple earth retaining devices are separately manufactured or used separately, which is uneconomical.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a simple earth retaining device which can be used economically by making the members constituting the simple earth retaining device shared. Is to do.

[0007]

That is, the present invention relates to a simple earthing device comprising a frame having a pair of columns and a ladder-like cross-section traversing a beam between the columns, and an earth retaining plate which can be accommodated in a guide groove of the column. A vertical beam provided on the inner side of the retaining plate, to which the cutting beam can be attached, and a protrusion provided on the groove bottom of the guide groove of the column and imparting a degree of freedom of horizontal rotation to the retaining plate. The cutting beam is formed in a box shape by extending the cutting beam in common between the columns or between the vertical beams of the earth retaining plates facing each other.

[0008]

Embodiment 1 Embodiments of the present invention will be described below with reference to the drawings. <A> Overall Configuration of Simple Earthing Device FIG. 2 is a perspective view of the simple earthing device. The simple earthing device is a frame in which a plurality of cutting beams 20 are laid in a ladder shape between a pair of columns 10, 10. 30 and a retaining plate 40 that can be fitted to the column 10 are basic components. The present invention has improved pillars 10 and retaining plates 40 as described below.

<B> Support The support 10 is formed by joining two steel materials having a C-shaped cross section and one steel material having a rectangular cross section by welding or the like. Guide grooves 11 having a C-shaped cross section are formed on both sides of the column 10 so that the side portions of the retaining plate 40 can be fitted thereto. The column 10 is provided with a vertical beam 12 on the other side surface for attaching a cutting beam. The vertical beam 12 has a plurality of holes 13 formed in the longitudinal direction thereof so that the cutting beam 20 can be connected to an arbitrary height. The hole 13 is desirably formed by penetrating the pipe 14 through the vertical beam 12. This is the vertical beam 12 through the hole 13
This is to prevent earth and sand and rainwater from entering inside. On the side surface in the guide groove 11, a projection 15 having a mountain-shaped or semicircular cross section is provided along the longitudinal direction of the column 10. As shown in FIG. 1, the protrusion 15 is a protrusion for reducing the sliding resistance with the retaining plate 40 and providing the retaining plate 40 with a freedom of horizontal rotation. I do not receive. The upper and lower portions of the projections 15 may be cut obliquely and sharply formed in order to reduce the penetration resistance of earth and sand and to smoothly fit the earth retaining plate.

<C> Earth retaining plate On both side end surfaces of the earth retaining plate 40, wing plates 41, 41 are provided. The wing plate 41 is a member for restricting the retaining plate 4 fitted in the guide groove 11 of the support post 10 in a horizontal direction, and may be omitted in some cases. A plurality of vertical beams 42 are provided inside the earth retaining plate 40. The vertical beam 42 is the earth retaining plate 4
In addition to functioning as a reinforcement member of No. 0, it also functions as an attachment member of the cutting beam 20. Therefore, like the vertical beam 42 of the support | pillar 10, the vertical beam 42 is comprised by the square steel material which can cover the cutting beam 20, and the several hole 43 is formed along the longitudinal direction. A racket 44 is provided on the upper and lower portions inside each of the retaining plates 40 so that the stacked upper and lower retaining plates 40 can be connected by bolts. Further, the lowermost surface of the earth retaining plate 40 located at the lowest position is sharply formed in order to reduce the penetration resistance in the ground. The earth retaining plate 40
Is desirably constituted by a laminate of a plurality of box steels oriented horizontally. This is to satisfy both requirements of weight reduction and high rigidity.

<D> Cut Beam The cut beam 20 is a member that ultimately receives the earth pressure acting on the retaining plate 40, and has a function of expanding and contracting the entire length according to the groove width to be cut. As expansion and contraction means of the cutting beam 20,
Known means such as a screw type, a fluid cylinder type, and a pinning type can be adopted. At both ends of the cutting beam 20, U-shaped hooking portions 21 and 21 are formed in common with the vertical beams 12 and 42 of the support column 10 and the retaining plate 40 so that they can be exteriorized. A pin hole 22 corresponding to the holes 13 and 43 of the vertical beams 12 and 42
Are bored, and can be connected by inserting a pin 23 into a pin hole 22 aligned with these holes 13 and 43. As described above, the simple earth retaining device forms the side end surface of the earth retaining plate 40 in a flat shape, and attaches the cut beam 20 to the pillar 10 and the earth retaining plate 40, respectively, in that the protrusion 15 is formed on the column 10 side. The point that the possible vertical beams 12, 42 are provided is an improvement.

[0012]

[Usage] The simple retaining device according to the present invention can be used in both a slide rail type and a box type. The following describes how to use each format. <B> Slide rail type A first set of frames 30 is erected with a backhoe or the like in a groove previously dug, and then the columns 1 constituting the frame 30
The earth retaining plate 40 is inserted along 0, 10 and then a second set of frames 30 is erected along the earth retaining plate 40 to form a box shape (see FIG. 4). While excavating the inside of the box-shaped retaining plates 40, 40, the retaining plates 40, 40 and the building frame 30 are alternately pushed in and sunk to a predetermined depth to complete the first set of retaining. Until we can secure an open groove about the entire length of the buried object,
The above retaining operation is repeated several times (see FIG. 5). When the laying of the buried object is completed, the burial is carried out and the earth retaining plate 40 and the frame 30 are sequentially pulled out from the first set of soil, and the pulled out frame 30
Then, the earth retaining plate 40 is transported in the cutting direction and is again provided for earth retaining.
The buried object is buried over a long distance by repeating the formation and removal of the earth retaining material. In addition, as shown in FIG. 1, the location where the cut groove is curved, as shown in FIG. An earth retaining plate 40 can be installed.

<B> Box type The simple retaining device according to the present invention is not only a “slide rail type” that assembles the retaining device in parallel with the construction, but also a “box type” that uses a retaining device previously assembled in a box shape on the ground. "
Can be shared. That is, as shown in FIG. 6, the cutting beam 20 is laid horizontally between the longitudinal beams 42, 42 of the facing retaining plates 40, 40, and each of the cutting beams 20 and the retaining plates 40, 40 are connected to form a box. Assemble the earth retaining device. The retaining plate 40 and the cutting beam 20 used in this assembly are of the slide rail type. The soil retaining device thus assembled is set on the site, and the left and right retaining plates 40, 40 are set.
While excavating the inside of the ground, push the entire retaining device into the ground,
Form the first set of earth retaining pieces. Thereafter, a similar retaining device is excavated and pushed into the ground adjacent to the previously retained retaining device. After burying the buried object, bury it, bury it, and then pull out the retaining device in the order in which it was pushed in, and reuse it on the side of the open cut. Here, when each soil retaining device is laid adjacent to
Since the side end surfaces (wing plates 41) of the earth retaining plates 40, 40 constituting each earth retaining device are flat and have no protrusions, the entire side end surfaces of the adjacent earth retaining plates 40, 40 can come into contact with each other. There is no gap in the part. Also in the case where the cut groove is curved, as shown in FIG. 7, even if the earth retaining plates 40, 40 are slightly bent, as long as the blade plates 41, 41 are located in contact with each other in the vertical direction, they are always in line with the surface. Contact relationship can be maintained.
Therefore, there is no need to worry about the outside earth and sand flowing into the inside of the retaining plate 40.

[0014]

As described above, according to the present invention, while the side end surface of the earth retaining plate is formed in a flat shape, the projection is formed on the pillar side, and the beam can be attached to the pillar and the earth retaining plate respectively. The provision of the vertical beams has the following specific effects. <A> Both the slide rail type and the box type simple soil retaining device can be configured by using both the retaining plate and the cutting beam, so that the components can be shared and economical construction is possible. <B> Since the protrusion is provided at the bottom of the guide groove of the support,
It is possible to flatten both end surfaces of the retaining plate while securing the freedom of horizontal rotation of the retaining plate. Therefore, in the box type in which the earth retaining plates are constructed adjacent to each other, the contact relationship between the adjacent portions of the earth retaining plates can be maintained, and a high sediment inflow prevention effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a simplified earth retaining device according to a first embodiment with a part thereof omitted.

FIG. 2 is an overall perspective view of a simple slide rail type retaining device.

FIG. 3 is a side view of the column.

Fig. 4 Conceptual diagram of earth retaining work used as a slide rail type simple earth retaining device

Fig. 5 Conceptual diagram of earth retaining work used as a slide rail type simple earth retaining device

FIG. 6 is an overall perspective view of a box type simple earth retaining device.

FIG. 7 is an explanatory view for explaining a contact state when the earth retaining plate is inclined and adjacent to each other.

FIG. 8 is a plan view of a part of a simple earth retaining device based on the present invention.

FIG. 9 is an explanatory view for explaining a contact state when the earth retaining plates constituting the simple earth retaining device on which the present invention is based are arranged adjacent to each other.

Claims (1)

[Claims] 1. A simple retaining device comprising a frame and a retaining plate which can be accommodated in a guide groove of the column by cutting a beam in a ladder-like manner between a pair of columns, provided inside the retaining plate, A vertical beam to which the cutting beam can be attached, and a projection provided at the bottom of the guide groove of the column and providing the soil plate with a degree of freedom of horizontal rotation. A simple earth retaining device, characterized in that a cutting beam is laid horizontally between vertical beams of a plate to form a box shape.