JPH0715833U - Simple soil retention support - Google Patents

Abstract

(57) [Summary] [Purpose] Suitable for small-scale burying or repair work of electric wires, water and sewer pipes, telephone lines, etc., with a simplified structure, especially as it can be easily temporarily assembled outside the excavation trench and is as it is. It can be installed in the groove, and it is possible to easily ensure the safety of the installation work site where the worker is. [Structure] A bracket 14 formed by arranging a plurality of elongated holes 18 side by side in the height direction is joined and fixed to the facing surfaces of the plate materials 5 and 6, and these plate materials 5 and 6 are hung between the groove wall surfaces of the excavation groove 1. It is hung in the groove by the hanging rod 13. A simple earth retaining support configured to connect the ends of the beam support 16 to the plate members 5 and 6 by vertically adjusting the connecting pins 27 and 32 that are inserted into the elongated holes 18, respectively.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a simple earth retaining support suitable for civil engineering work in which electric wires, gas pipes, water and sewer pipes, telephone pipe cables, etc. are buried in the ground.

[0002]

[Prior art]

 Generally, when newly burying or repairing electric wires, gas pipes, water and sewer pipes, telephone cable pipes, etc. in the ground, it is possible to prevent collapse of the trench wall in the trench excavated in the ground with a simple soil retention support. , To ensure the safety of work. Various types of soil retaining supports have been proposed in the past. For example, the soil retaining support disclosed in Japanese Utility Model Publication No. 2-42740 is known. This earth retaining support is provided with a bulging laterally on the sheet piles driven along both side walls over the entire length of the excavation trench, and the pressing plate is locked to this rising by a locking member. A piston / cylinder mechanism that operates with pressure medium is installed on the above, and a long hole or dovetail groove is provided in either one of the locking member and the pressing plate, and a bolt is passed through this oblong hole or the bolt head is provided in the dovetail groove. The engaging member is attached to the pressing plate so that the height of the engaging member can be adjusted by inserting the portion.

Further, Japanese Examined Patent Publication No. 4-37204 discloses a soil retaining method for facilitating the work of constructing a stretchable cut which is erected between the abdomen. In this earth retaining method, a hook member formed in an inverted L shape is connected to both ends of an expandable rod body to form a temporary receiving rod body, and the hook member is hooked on the left and right groove walls to excavate the rod body. Suspend and hold it in the groove, place the upholstery on both ends of the rod body, install the earth retaining plate between the groove wall and the upholstery, and install the stretchable cut between the uprights. It is constructed by laterally extending and holding the earth retaining plate against the groove wall with the required pressure.

[0004]

[Problems to be solved by the device]

 However, in the soil retaining support disclosed in the above Japanese Utility Model Publication No. 2-42740, a sheet piling driven along the groove wall is provided with a bulging laterally, and the pushing plate is provided with a locking member on the bulging. Since the piston / cylinder mechanism is installed between the pressing plates, it requires a large amount of support installation work, requires a long time, has a narrow groove width, and has a groove depth of at most 1.5 m. There was a problem that the cost was high and unsuitable for small construction. Similarly, in the earth retaining method of Japanese Patent Publication No. 4-37204, the temporary retaining rod is previously installed in the excavation groove, and the earth retaining plate is erected between the wall of the groove and the abdomen. Since it needs to be installed horizontally on the board, it requires a large amount of work, and since many temporary rod members must be prepared as auxiliary tools, there is a problem in that their transportation, installation, and storage management are troublesome. It was As described above, the conventional soil retaining supports are all intended for large-scale construction, and the groove width as shown in Fig. 7 is narrow, which is not suitable for small-scale construction with a relatively shallow groove depth. A wide digging ditch is likely to cause a landslide accident, so there is a demand for the development of a simple and easy-to-hold soil retention support suitable for small-scale construction. In other words, when the purpose is to repair existing buried pipes, etc., it is possible to reduce the width of the excavation groove in order to reduce the construction cost and to carry out partial earth retaining support work at the place where repair work is required. The development of a simple type of soil retention support was awaited.

Therefore, the present invention has been made in view of the above-mentioned problems and demands of the related art, and an object of the present invention is to simplify the structure and to embed electric wires, water and sewer pipes, telephone lines, and the like in a small size. It is also suitable for use in repair work, especially because it can be easily assembled temporarily outside the excavation groove and can be installed in the groove at the required location as it is, making it easy to ensure the safety of the installation work site where the worker is. It is to provide a simple soil retention support that can be performed.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention has a pair of plate members, each of which has a hanging rod passing portion at its upper end and is arranged to face each other along each groove wall of an excavation groove, and is inserted into the hanging rod passing portion. A suspension rod that suspends the pair of plate members in the excavation groove by being stretched between both groove walls, and an extendable and integral beam support that is vertically adjustable between the pair of plate members. A plurality of support holding portions that detachably hold the end portions of the beam supports are arranged in parallel in the height direction on the facing surfaces of the pair of plate members.

[0007]

[Action]

 In the present invention, the suspension rod is inserted into the suspension rod passing portion of the plate material and is suspended between both groove walls of the excavation groove to suspend and hold the plate material in the excavation groove. The beam support is installed between plate materials having a width of, for example, 50 to 200 cm, and is stretched to apply a tensioning force to the plate material to press against the groove wall with a predetermined pressure. The material of each member is not particularly limited, and a steel material may be used. However, by using an aluminum material, it is possible to reduce the weight and further improve the handleability.

[0008]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. 1 is a plan view showing an integrated beam support as an embodiment of the simplified soil retaining support according to the present invention, FIG. 2 is a side view of the support, and FIG. 3 is a perspective view of an essential part of the support. is there. In these figures, 1 is an excavation trench excavated by standing up on the trench walls 3a and 3b, and 4 is a simple earth retaining support that is installed in the excavation trench 1 and prevents collapse of the trench walls 3a and 3b. is there.

The simplified soil retaining support 4 has a pair of plate members 5 and 6 arranged along the groove walls 3a and 3b and facing each other, and these plate members 5 and 6 are shown in FIG. 4 (a). As shown in FIG. 4, the inside is divided into a plurality of hollow chambers by a partition plate 7, for example, a hollow panel 8 having a width of 50 to 200 cm, or a sheet pile 9 shown in FIG. Each of the extruded shape members 10 as a reinforcing member is joined and fixed by welding, bolt fastening, or the like as a reinforcing member, so that the extruded shape member 10 has sufficient strength and is inserted into the through hole 12 which is a hanging rod passing portion provided at the center of the upper end portion. It is suspended and held by a hanging rod 13. The suspension rod 13 is stretched across the excavation trench 1 and both ends thereof are supported by the ground surface.

A bracket 14 is joined and fixed to the center of the facing surfaces of the respective plate members 5 and 6 by welding, bolt fastening or the like. The bracket 14 is provided with supporting walls 15 A and 15 B which are long in the vertical direction as a pair. Further, a plurality of support holding portions 17 for holding the end portions of the beam support 16 are provided on the support walls 15A and 15B. The beam support holding portion 17 is composed of a plurality of long holes 18 that are long in the horizontal direction and are arranged in parallel in the height direction of the support walls 15A and 15B at appropriate intervals.

As shown in FIG. 5, the beam support 16 has an outer cylinder 20 made of a cylindrical body of aluminum alloy or the like having one end opened and a rectangular pressing plate 19 joined to the other end, and a slidable outer cylinder 20. It has an inner cylinder 22 made of aluminum alloy or the like, which is freely inserted and is protruded from the outer cylinder 20 and a rectangular pressing plate 21 is joined to the outer end of the outer cylinder 20. A male screw portion 24 with which the nut 23 is screwed is formed with a long hole 25 which is long in the axial direction, a pin hole 26 is formed through the peripheral surface of the side end portion of the outer end in the radial direction, and the pressing plate 19 is provided with the above-mentioned. A connecting pin 27 inserted through the pin hole 26 is connected via a chain 28. Both ends of the connecting pin 27 penetrating the pin hole 26 are inserted into and supported by the long holes 18 of the support walls 15A and 15B of the bracket 14 provided in the one plate member 5, so that the outer cylinder 20 is connected to the one plate member. 5, the upper and lower positions of the outer cylinder 20, that is, the beam support 16 are adjusted stepwise by selecting the elongated holes 18 at appropriate positions which are separated from each other in the support walls 15A and 15B. be able to. On the other hand, a plurality of stopper pin holes 29 are juxtaposed at appropriate intervals in the axial direction on the peripheral surface of the inner end of the inner cylinder 22 so that they are on the same horizontal line as the elongated holes 25. A pin hole 30 is penetratingly formed on the peripheral surface of the side end portion, and a connecting pin 32 inserted into the pin hole 30 is connected to the pressing plate 21 through a chain 31. Both ends of the connecting pin 32 penetrating the pin hole 30 are inserted into and supported by the long holes 18 of the support walls 15A and 15B of the bracket 14 provided on the other plate member 6, so that the inner cylinder 22 is made of the plate member. 6 is removably connected to the support wall 15A and 15B, and the vertical positions of the beam support 16 are adjusted step by step by selecting the elongated holes 18 at appropriate positions separated from each other in the support walls 15A and 15B. be able to.

Reference numeral 34 denotes a stopper pin that connects the outer cylinder 20 and the inner cylinder 22 and cooperates with the nut 23 to expand the inner cylinder 22 and apply a tensioning force to the beam support 16 itself. As shown in, the chain 33 or the like is connected to the outer cylinder 20 via a ring body. The stopper pin 34 is selectively inserted through any one of a plurality of stopper pin holes 29 provided in the inner cylinder 22 through the elongated hole 25 and is positioned on the right side of the nut 23 in FIG. When the nut 23 is moved forward by the rotation of the handle 36 (in the direction of the arrow in FIG. 5), it is pressed by the nut 23 and moves along the elongated hole 25 to extend the inner cylinder 22. Therefore, the beam support 16 is given a tensile force, presses one plate member 5 against the groove wall 3a at a predetermined pressure through the pressing plate 19 of the outer cylinder 20, and presses the other plate member 6 through the pressing plate 21 of the one inner cylinder 22. Similarly, the groove wall 3b is pressed with a predetermined pressure.

The connecting pins 27, 32 and the stopper pin 34 may be simple rods, but the following ones are more suitable. Here, the connecting pin 32 will be representatively described. That is, as shown in FIG. 6, the connecting pin 32 is composed of first and second pins 32A and 32B which are divided into two in the axial direction and are foldably connected by a pin 35, and the first pin 32A is the inner cylinder 22. Is slightly longer than the outer diameter of the second pin 32B and penetrates the elongated hole 18 and the pin hole 30, and the second pin 32B has an appropriate length. In such a connecting pin 32, if the second pin 32B is bent in the axial direction of the inner cylinder 22 or downward as shown by the chain double-dashed line in FIG. It is possible to prevent this, and it is possible to reduce the size of the protrusion that protrudes to the side of the inner cylinder 22.

When the simple type soil retaining support 4 having such a structure is installed in the excavation trench 1, the beam support 16 is previously installed between the plate members 5 and 6 via the connecting pins 27 and 32, and the length thereof is increased. After roughly adjusting the height by selecting the stopper pin hole 29 through which the stopper pin 34 is inserted, the distance between the two plate members 5 and 6 is set to be substantially equal to or slightly smaller than the groove width of the excavation groove 1. The plate members 5 and 6 whose intervals have been adjusted are suspended by suspension rods 13 and inserted into the excavation trench 1 along the trench walls 3a and 3b, and the suspension rods 13 are hung between the trench walls. Then, when the nut 23 is rotationally moved by the handle 36 (FIG. 5) and the stopper pin 34 is pressed and moved, the inner cylinder 22 is expanded and finely adjusted, and the pressing plates 19 and 21 are applied to the plate members 5 and 6 at predetermined pressures. In order to press it, the plate materials 5 and 6 are pressed against the groove walls 3a and 3b at a required pressure, and the installation work of the simplified soil retaining support 4 is completed.

As described above, according to the present invention, it is not necessary to perform the complicated work of hitting a conventional sheet pile and horizontally setting the abdomen, and the suspension rod 13 is temporarily assembled outside the excavation groove 1. Since it can be suspended and installed in the excavation groove 1 as it is and fixed by operating the handle, even an excavation groove with a narrow groove width can be installed easily and in a short time. Makes it easier to work in the groove. Further, the beam support 16 can be easily attached and detached, and the vertical position can be adjusted according to the groove depth or the depth of the buried pipe.

FIG. 8 and FIG. 9 are a front view and a side view, respectively, showing a part of one plate member according to another embodiment of the present invention. In this embodiment, a V-shaped through hole 12 as a suspension rod passing portion is provided in the upper central portion of the plate members 5 and 6, and the plate members 5 and 6 are excavated as shown in FIGS. 9 (a) and 9 (b). It is configured so that it can be tilted back and forth and left and right according to the deformation condition of No. 1. As a result, although depending on the size of the through hole 12, the inclination angle θ of the excavation groove 1 in the up and down directions is about 15 °, and the inclination angle α of the excavation groove 1 in the left-right longitudinal direction is about 5 °. Becomes Since other configurations are substantially the same as those of the above-mentioned embodiment, the same parts are designated by the same reference numerals and the description thereof will be omitted.

The simple soil retaining support having such a structure has an advantage that the plate members 5 and 6 can be inclined in the front-rear direction and the left-right direction according to the shape of the excavation groove 1 and the obstacle.

FIG. 10 and FIG. 11 are a side view and an exploded perspective view of a main part of a second embodiment in which two beam supports are used as still another embodiment of the present invention. In this embodiment, the first and second beam support holding portions 40 and 41, which are vertically spaced from each other on opposite surfaces of the pair of plate members 5 and 6, and a pair of upper and lower portions which are located below the holding portions 40 and 41, are provided. Receiving rods 42 and 43 made of hollow members are provided respectively, and the first and second beam support holding portions 40 and 41 hold the pressing plates provided at the respective ends of the two beam supports 16A and 16B. It is composed. The first beam support holding portion 40 provided on each of the plate members 5 and 6 and located on the upper side has a holding groove 44 that is opened upward by being formed in a horizontally long U-shape in a plan view by extruding aluminum or the like. Then, the pressing plates 19A and 21A (19A not shown) provided at the end of the upper beam support 16A are respectively dropped into the holding groove 44 from above and locked by the receiving rod 42. On the other hand, the second beam support holding portion 41 provided below the first beam support holding portion 40 and provided on each of the plate members 5 and 6 is also formed in a vertically long U-shape in a side view by extruding aluminum or the like. By this, there is a holding groove 45 that opens to the left and right, and pressing plates 19B and 21B (19B not shown) provided at the end of the lower beam support 16B are respectively inserted into the holding groove 45 from the side. Be done. If the upper and lower beam support holding portions 40 and 41 are made to have different directions in this way, the upper and lower beam supports 16A and 16B can be attached to and detached from the plate members 5 and 6 in any order. In addition, a semi-circular metal fitting 46 that forms a hanging rod passing portion is provided in the center of the upper surface of each of the plate members 5 and 6, and a groove portion 47 is formed in the center of the lower end that has little effect even if the groove collapses. . The rest of the configuration is the same as in the above embodiment.

In the simple soil retention support having such a structure, for example, two beam supports 16A and 16B can be simultaneously or selectively installed depending on the depth of the excavation trench 1, When two pieces are installed, a larger tensile force can be obtained and the collapse of the groove walls 3a and 3b of the excavation groove 1 can be reliably prevented. Therefore, the work in the excavation groove 1 can be safely performed. Further, it is not necessary to connect the pressing plates 19A, 21A, 19B and 21B of the beam supports 16A and 16B to the plate members 5 and 6 with connecting pins, and the work of installing the beam supports 16A and 16B is simple and easy.

[0020]

[Effect of device]

 As described above, the simple soil retention support according to the present invention is constructed by suspending a pair of plate materials with a suspension rod and arranging a plurality of support holding parts on these plate materials in the vertical direction. No need to drive sheet piles, and it is possible to erected in the groove as it is after being temporarily assembled outside the excavation groove, making it easy and quick to install the simplified soil retention support in the groove. It is suitable for small-scale burying or repair work of electric wires, gas pipes, telephone wires, etc. with narrow groove width and relatively shallow groove depth. In addition, it is highly versatile, and the beam support installation work is simple and easy, and not only can the vertical position be adjusted according to the groove depth, but it is also possible to install multiple beam supports if necessary. The collapse of the groove wall within the minimum required limit can be reliably prevented, and the safety of the work in the groove can be improved. This will also reduce the cost of these works.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a simple soil retaining support according to the present invention.

FIG. 2 is a side view of the support.

FIG. 3 is an exploded perspective view of a main part of the support.

4A and 4B are cross-sectional views of a plate material.

FIG. 5 is a front view of a beam support.

FIG. 6 is a partial perspective view showing an assembled state of a connecting pin and the like.

FIG. 7 is a perspective view showing a mode of use of the simplified soil retaining support according to the present invention.

FIG. 8 is a front view showing an example of a through hole of a suspension rod, the main part of which is a plate member.

9A and 9B are respectively a side view and a plan view showing the inclination of the plate material.

FIG. 10 is a side view showing another embodiment of the present invention.

11 is an exploded perspective view of a main part in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Excavation groove 2 Ground 3a, 3b Groove wall 4 Simplified soil retaining support 5,6 Plate material 12 Hanging rod through hole 13 Hanging rod 14 Bracket 16 Beam support 17 Beam support holding part 18 Long hole 19 Pressing plate 20 Outer cylinder 21 Pressing Plate 22 Inner cylinder 23 Nut 24 Male screw part 25 Long hole 27 Connecting pin 32 Connecting pin 34 Stopper pin 40, 41 Beam support holding part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Katsushi Higashiyama, 4-12-2 Narashino, Funabashi, Chiba Prefecture, Japan Funabashi Plant, Nippon Light Metal Co., Ltd. (72) Akiyoshi Okubo 3-13-12, Mita, Minato-ku, Tokyo Japan Light Metals Co., Ltd. (72) Inventor Shizuo Matsumoto 3-13-12 Mita, Minato-ku, Tokyo Japan Light Metals Co., Ltd. (72) Inventor Tatsuo Koizumi 2-11, Minamisenba, Chuo-ku, Osaka-shi, Osaka No. 20 Wakanauchi Co., Ltd. (72) Inventor Hiroshi Suzuki 1-137 Nishi 4-chome, Senriyama, Suita City, Osaka Prefecture 1-1408

Claims (1)

[Scope of utility model registration request] 1. A pair of plate members, each of which has a suspension rod passing portion at its upper end and is arranged to face each other along each groove wall of the excavation groove,
A suspension rod that hangs the pair of plate members in the excavation groove by being inserted into the suspension rod passing portion and hung between both groove walls, and is extensible so that it can be vertically adjusted between the pair of plate members. A plurality of beam supports that are integral with each other, and a plurality of support holding parts that detachably hold the ends of the beam supports are arranged in parallel in the height direction on the facing surfaces of the pair of plate members. A characteristic simple soil retention support.