JPS5847092Y2 - Earth retention shoring device for excavated trenches - Google Patents

Description

[Detailed description of the invention] The present invention relates to an earth retention and shoring device for excavated trenches for burying sewerage main pipes, etc., especially when water supply pipes, gas pipes, etc. are buried at relatively shallow depths at the trench excavation position. The present invention relates to an excavation trench earth retention and shoring device suitable for use when excavating areas.

Generally, when excavating a trench, a shovel-type excavator is used to remove soil to the required width and depth. It is customary to pour them together to form an earth retaining wall.

However, this type of construction method causes severe noise and vibration when driving the sheet piles, which is a pollution problem in urban areas, and even if it does not cause a pollution problem, when excavating roads in urban areas Many water pipes, gas pipes, etc. are buried to a depth of approximately 1.5 m, and there is a risk that these pipes may be damaged or cut by driving sheet piles.

The present invention was developed in view of the current situation, and its purpose is to make it possible to excavate trenches without causing noise and vibration that would cause pollution problems, and without damaging buried pipes. Our goal is to provide earth retention shoring equipment for excavated trenches.

The present invention consists of guide rails that are erected at required intervals along both sides of an excavation trench so as to settle as soil is removed for trench excavation, and vertical rails that are placed between adjacent guide rails on each side of the excavation trench. A guide frame that is slidably fitted in, a plurality of sheet piles whose longitudinal side edges are slidably engaged with each other so that they sink using the outer surface of each guide frame as a guide, and guide rails that face each other in the groove width direction. a spindle that connects the guide frames, and a support frame that is installed on the outside upper part of the guide frame and prevents the sheet pile from leaving the guide frame, and supports each guide frame to the position where the existing cross pipe etc. is buried. This allows the trench to be excavated by allowing the trench to settle together with the sheet pile, and then allowing only the sheet pile that is not in contact with the cross pipe to settle.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the earth retention shoring device according to the present invention includes guide rails 1 arranged at required intervals along both sides of an excavated trench A, and guide rails 1 arranged at required intervals along both sides of an excavated trench A, and A guide frame 2 removably fitted between guide rails 1.1 facing the guide room 2, a plurality of sheet piles 3 that sink down using the outer surface of the guide room 2 as a guide and become a retaining wall, and a groove width It is composed of guide rails 1 facing each other in the direction and a spindle 4 connecting the guide rails 1 to each other.

As shown in FIGS. 1 and 3, the guide rail 1 includes lip channel steels 5, 5 fixed back to back in the longitudinal direction of the excavated groove A, and a lip channel steel 5 fixed to the inside thereof, that is, at the center of the excavated groove A. The lip channel steel 6 is fixed to the facing side and opens toward the center of the excavated groove A.
As shown in the drawings and FIG. 3, the side end portions of the guide frame 2 are fitted so as to be slidable up and down, and the end portions of the spindle 4 are supported by the lip channel steel 6.

The guide frame 2, as shown in FIGS. 1 and 4,
A pair of vertical bars 2a arranged on both sides, and both vertical bars 2a, 2a
For example, three horizontal bars 2 that are in between and connect the two integrally.
It is composed of b.

The vertical bar 2a is made of L-beam steel, and has 7 or 3 protruding pieces protruding from one side thereof at required intervals in the vertical direction.
On the outer surface side facing the lip channel steel 5, as shown in FIG. Further, on the inner surface side, as shown in FIG. 5, a support piece 9 is fixed at the position of the protrusion piece 7, which protrudes horizontally toward the opposing vertical bar 2a.

Both sides of the horizontal beam 2b are placed and fixed on this support piece 9.

The horizontal bar 2b is formed of H-beam steel with a horizontally arranged web,
The web and the inner flange are respectively fixed to the support piece 9 and the vertical bar 2a via the pole 10 etc., as shown in FIG.

- A support frame 11 that bends diagonally upward and outward so that the upper end opening is wide is welded to the outer flange of the horizontal bar 2b at the upper end, and the outer flange of the horizontal bar 2b at the center and lower end At the upper end of the flange, guide portions 12 are provided, each of which serves as a guide when the sheet pile 3 is lowered along the outer surface of the horizontal crosspiece 2b, and is inclined inward toward the flange diagonally upward. .

The sheet pile 3 is attached to a support frame 11 as shown in FIGS. 1 to 4.
The center and lower end horizontal bars 2bcr) are inserted into the gap between the horizontal bars 2b at the upper end, and sink as the guide frames 2, 2 are excavated and drained using one side of l+'1 as a guide, and the support The frame 11 prevents the guide frame 2 from being removed outwardly.

The sheet piles 3 are assembled and assembled as shown in FIGS. 1 and 4 (as shown in FIGS. 1 and 4) so that their longitudinal side edges are slidably engaged with each other.

As shown in FIGS. 1 and 2, the spindle 4 includes a turnbuckle outer cylinder 13 and a turnbuckle outer cylinder 1.
A connecting rod 14° 14 that is screwed together from both ends of the turnbuckle outer cylinder 130 and expands and contracts as the turnbuckle outer cylinder 130 rotates, and each connecting rod 14
and a support member 15 that supports the tip of the lip channel steel 6.

As shown in FIG. 2, the spindles 4 are arranged, for example, three in each direction, to support the earth pressure. is configured to do so.

As shown in FIGS. 3 and 6, the support member 15 is attached to the end of the connecting rod 14 via a pin 16.
A short cylindrical body 17 connected to the
At the front side of the front plate 19, that is, at the center of the surface of the front plate 19 facing the lip channel steel 6, there is a lip channel steel disposed laterally. 6
A cylindrical fulcrum member 20 is fixedly inserted into the lip groove from the -L end side.

The fulcrum member 20 is fixed at a predetermined position on the lip channel steel 6 via a fulcrum pin 21 that passes through the fulcrum member 20 and the lip channel steel 6, respectively.

On the front plate 19 located one foot below this fulcrum member 20, there is a leg piece 2 that is biased toward the bottom side of the lip groove by a spring 22.
3 are provided respectively, and this leg piece 23 is connected to the supporting member 2.
A slight swing in the vertical direction of the spindle 4 with 0 as the branch point is allowed.

In the above configuration, during construction, first the guide rail 1 with the guide frame 2 attached is placed at the planned excavation position, and the guide rails 1.1 facing each other in the groove width direction are connected at required intervals via the spindle 4. .

Then, the sheet piles 3 are inserted and arranged from above along the outer surface side of each guide frame 2.

At this time, the sheet pile 3, as shown in FIGS. 2 and 4,
The support frame 11 prevents the support frame 11 from separating from the guide frame 2, and the support frame 11 is guided by the guide portion 12, and is attached to the outer surface of each horizontal bar 2a.

Next, the inside of the assembly is excavated and removed.

Then, as shown in FIG. 7, the assembly gradually sinks due to its own weight as it is excavated.

At this time, if settling is insufficient, use an auxiliary reduction blade.

As the excavation and removal of soil continues, the assembly sinks further, as shown in FIG. 8, and functions as a support for the excavated trench A.

As the excavation and earth removal work at the required location approaches completion, the guide frame 2 is connected to the guide rail 1 at the tip in the excavation direction, and the guide rail 1 is connected to the tip side thereof, and the excavation and earth removal is performed by the same operation as described above. .

Once the excavation trench A has been excavated in this way, the buried pipes 24 are arranged and connected sequentially as shown in FIG. 8, and then the sheet piles 3
, the guide frame 2 and the guide rail 1 are removed, and the excavated groove A is sequentially filled.

Then, the above operations are repeated to sequentially bury the buried pipes 24.

In addition, since each extracted member is used repeatedly as the trench is dug, a large number of sets are not required in total.

Next, when excavating a trench in an urban area, etc., the cross pipe 25 may already be buried 1.5 m below the ground surface at the trench excavation location, or there may be obstacles such as gravel, as shown in Figure 9. There is.

At this time, the sheet piles 3 directly above the obstacles such as the guide frame 2 and the cross pipe 25 come into contact with them and do not sink any further.

In such a case, excavation and removal will continue in this state.

Then, as shown in FIGS. 9 and 10, the sheet piles 13 that are not in contact with the obstacles settle down as the earth is removed, forming an earth retaining wall.

At this time, since the sheet pile 3 is supported by the support frame 11 and guided by the outer surface of the horizontal beam 2a, sufficient resistance against earth pressure can be obtained.

In addition, since the guide rail 1 sinks together with the sheet pile 3,
This does not interfere with the guidance of other guide frames 2.

The configuration described above has the following features.

First, since there is no need to drive sheet piles during trench excavation, trench excavation can be performed without noise and vibration pollution, and a trench of a desired depth can be obtained.

Even if there are obstacles such as cross pipes or gravel near the ground surface, the sheet piles can be lowered to form an earth retaining wall, so there is no problem with the work and it is easier to drive the sheet piles. Since it is not necessary, there is no need to damage the cross pipe.

On the other hand, since the structure is simple and can be disassembled, it is easy to transport and can be manufactured at low cost, and commercially available sheet piles can be used as is, which is advantageous for the user.

Furthermore, since only the support frame for supporting the sheet pile on the horizontal beams protrudes outside the sheet pile, the guide frame sinks smoothly as earth is excavated and removed.

The present invention has been described above based on preferred embodiments. According to the present invention, there is no noise or vibration that would cause pollution problems, and there is no need to worry about obstructions such as already buried pipes or gravel. Ditches can be excavated with or without.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the earth retention shoring device according to the present invention;
The figure is a sectional view taken along the line II-II in Figure 1, Figure 3 is an enlarged sectional view of the guide rail section seen from above, Figure 4 is a partial perspective view of Figure 1, and Figure 5 is a connection with the vertical beam. A perspective view showing the state;
Figure 6 is a partial vertical sectional view showing the connection state between the guide rail and spindle, Figures 7 and 8 are schematic diagrams showing the construction procedure in the normal case, and Figures 9 and 10 are It is a schematic diagram which shows the construction procedure in a certain case. 1... Guide rail, 2... Guide frame, 3... Sheet pile, 4... Spindle, 8a... Roller, 11... ...support frame,
12...Guide part, 13...Turnbuckle outer cylinder, 14...Connecting rod, 15...
・Supporting member, A... Excavation groove.

Claims (1)

[Scope of utility model registration request] 1. Guide rails that are erected at required intervals along both sides of the excavation trench so as to settle as soil is removed for trench excavation, and guide rails that are fitted vertically and slidably between adjacent guide rails in each excavation trench. A rectangular frame-shaped guide frame having a height corresponding to at least the depth of the excavation trench, and a plurality of guide frames whose longitudinal edges are slidably engaged with each other so as to sink using the outer surface side of each guide frame as a guide. A spindle that connects the sheet pile and guide rails facing each other in the groove width direction, a guide frame, and a support frame that is provided on the outer upper part of the frame and prevents the sheet pile from separating outward from the guide frame. An earth retaining support device for excavated trenches. 2. Earth retaining for excavation trenches according to claim 1, wherein a plurality of horizontal bars are provided within the rectangular frame of the guide frame, and a support frame is formed on the outside of the uppermost bar. Shoring equipment. 3. The earth retaining device for an excavated trench according to claim 1, wherein the upper edge of the support frame is inclined upwardly and outwardly. 4. The excavated trench earth retaining support device according to claim 2 or 3, wherein the upper edges of the crosspieces other than the top tier are inclined upwardly and inwardly.