JPS5847088Y2 - Earth retaining shoring board joint structure - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a joint structure for earth retaining support plates.

Recently, when excavating trenches to bury water, sewage, gas, etc. piping, telegraph and telephone cables, power transmission lines, etc., in order to prevent landslides on the left and right walls of the trench, the As shown, supports ti3 having guide grooves 2 on both sides are built facing each other on the left and right side walls of the partially excavated groove 1, and the spacing is maintained by supports 4, so that the facing supports The guide rollers 5a at one end of the earth retention support plate 5 are fitted into the guide grooves 2 on one side of the earth retention support plate 5, respectively, and pressed into the soil. The guide grooves 2 of No. 3 are fitted, and the supports 3 are erected facing each other, and the spacing is maintained by the supports 4. From then on, this assembled earth retaining structure is used as the groove 1 is excavated deeply. Then, press it further into the soil and install the pillar 3.
An earth retaining method was implemented in which an earth retaining support plate 5' was stretched between the guide grooves 2 and extended upward, and the earth retaining structure was assembled and connected in sequence according to the above procedure as trenching agent was applied in the longitudinal direction. There is.

By the way, when the earth retaining supports 5 in the earth retaining structure described above are press-fitted into the soil in conjunction with deep excavation of the trench 1, each earth retaining support plate 5' is extended and connected upward as shown in the figure. 5, 5', which are drilled at regular intervals in the left and right direction, are connected to a plurality of vertical supporting plate connecting holes (hereinafter simply referred to as connecting holes) 6, and horizontal locking holes in the shape of an inverted T are attached to the lower ends thereof. Insert the long connecting rod 8 with the lock 7, and attach the locking rod 7 to the lower earth retaining support plate 5.
The handle 10 at the upper end of the connecting rod 8 is engaged with a pair of projections 9 provided on the inner surface of the upper part of the connecting rod 7L6, and the handle 10 at the upper end of the connecting rod 8 is engaged with the periphery of the connecting hole 6.

However, in the actual trenching agent, the earth retaining support plate 5, which is press-fitted into the soil first, deforms due to the earth and sand load.
Since the connecting holes 6 do not match with the earth retaining supporting plate 5' placed on the earth retaining supporting plate 5 later, it is difficult to insert the connecting rod 8 into the connecting hole 6 of the lower earth retaining supporting plate 5.

Therefore, the earth retaining supports 5 and 5' are simply stacked without being connected and are pushed into the soil using a backhoe packet, etc., so when dismantling the earth retaining structure, the earth retaining supports must be pulled up one by one. It is something that must be done.

That is, after pulling out the upper earth retaining support plate 5', the lower earth retaining support plate 5 is pulled out, but in this case, the earth and sand will collapse, making it difficult to pull out the lower earth retaining support plate 5. be.

The present invention has been made to solve this problem, and aims to provide a joining structure for earth retaining supports that allows earth retaining supports to be easily joined in the vertical direction.

The following is a second example of the joint structure of the earth retention support plate according to the present invention.
To explain with reference to the figure and FIG. Among the four connecting holes 6, the connecting end of the intermediate connecting hole 6 located in a symmetrical position, that is, the upper end of the connecting hole 6 of the lowest earth retaining support plate 5, the upper earth retaining support plate 5 ′...... earth retaining plates 5, 5' are installed at both upper and lower ends of the connecting holes 6, respectively.
Pin hole 10.10' horizontal from both front and back sides of ・・・・・・
is drilled through.

The earth retaining support plate 5, 5' at the position of each pin hole 10.10'
. . . rectangular plates 12 each having a screw hole 11 in the center are welded to the front and back surfaces of the plates 12 with the screw holes 11 roughly aligned with the pin holes 10 and 10'.

The upper end of the connection hole 6 of the earth retention support plate 5 and the lower end of the connection hole 6 of the earth retention support plate 5' are connected to the upper end of the connection hole 6 of the earth retention support plate 5' and an earth retention support (not shown) above the upper end of the connection hole 6 of the earth retention support plate 5'. At the lower end of the connection hole of the plate, the upper and lower halves of a short joining fitting 14 are fitted, which have horizontal pin holes 13 and 13' drilled in the same direction at both the upper and lower ends. pin holes 1 at the top and bottom ends.
3' is the tapped hole 11 on either the front or back side of the earth retaining support plate, aligned with the pin holes 10 and 10' of the upper and lower earth retaining support plates.
It is inserted from the screw hole 1 of the attaching plate 12 and the screw hole 11
The tip of the screw pin 15 that is screwed into the hole is inserted into the hole.

Note that when the lower half of the joining fitting 14 is fitted to the inner surface of the upper end of the connecting hole 6, the joining fitting 14 is fitted to the required depth, that is, the pin hole 13' at the lower end and the connecting hole 6 are connected to the earth retaining support plate. A pair of left and right protrusions 16 are provided to support the pin holes 10 and 10' horizontally from both the front and back surfaces so that they are at the same height.

The joining structure of the earth retention shoring board according to the present invention is such that the earth retention shoring board is attached on top of the earth retention shoring board 5 that has been previously press-fitted into the soil at the same time as the additional trench 1 shown in FIG. 1 is further excavated. When extending and connecting the earth retaining support plate 5', the lower earth retaining support plate 5 deforms due to the earth and sand load, and the axial center line of the connecting hole 6 of the earth retaining support plate 5' that is about to be connected becomes the axial center line of the connecting hole 6 of the earth retaining support plate 5'. Even if they do not match, as long as the upper end opening of the connecting hole 6 of the earth retaining support plate 5 can be made to approximately match the lower end opening of the connecting hole 6 of the earth retaining support plate 5', the lower end and the upper end of the connecting hole 6 will have a length. It can be connected by fitting and fixing it to the L half and lower half of the short joint fitting 14.

That is, the lower half of the joint fitting 14 is fitted into the upper end of the connecting hole 6 of the earth retaining support plate 5, the pin hole 13 at the lower end of the joining fitting 14 is aligned with the pin hole 10jO' of the connecting hole 6, and the earth retaining support is secured. Board 5
When the screw pin 15 is inserted into the screw hole 11 of the plate 1-12 with screw hole 11 on either the front or back side of the plate and screwed into the screw hole 11, the tip of the screw pin 15 will be attached to the lower end of the joining fitting 14. The joining fitting 14 is fixed by being fitted into the pin hole 13'.

Next, the lower end of the connecting hole 6 of the earth retaining support plate 5' to be extended and connected is fitted into the upper half of the joint fitting 14 protruding from the upper edge of the earth retaining support plate 5, and the earth retaining support plate is placed on the earth retaining support plate 5. 5', and drill holes 11 on either the front or back side of the earth retaining support plate 5'.
When the screw pin 15 is inserted into the screw hole 11 of the attaching plate 12 and screwed into the screw hole 11, the tip of the screw pin 15 is fitted into the pin hole 13 at the upper end of the joining metal fitting 14, and the joining metal fitting 1 is inserted into the screw pin 15.
4 is fixed, and the earth retaining supporting plates 5 and 5' are connected via the joining metal fittings 14.

In connection of such earth retaining supports 5, 5', the connecting metal fittings 1
4 to the earth retaining support plates 5, 5', insert a screw pin into the screw hole 11 of the plate 1-12 with a screw hole 11 on the surface located outside the excavated groove 1 shown in Fig. 1. Insert 15 and j
- It is best to screw it into the same hole 11.

This makes it possible to extend and connect the earth retaining support plate without having to go into the trench 1 excavated during erection of the earth retaining structure, which is safe.

Also, when connecting the earth retaining supports 5, 5' on the ground or when attaching the joining fittings 14 to the earth retaining supports 5,
, 5', insert the screw pin 15 through the screw hole 11 of the plate 12 with the screw hole 11 on either the front or back side, and
Since it can be screwed into place, it is easy to handle and operate.

Moreover, the earth retaining support plate 5', which is extended and connected upward, has horizontal pin holes 10 and 10' at the upper and lower ends of the connecting hole 6, and a plate 12 with pin holes 11 on both the front and back sides of the connecting hole 6. Therefore, it can be connected to the lower earth retaining support plate 5 from either the upper or lower direction.

As detailed above, according to the joint structure of the earth retention shoring plate of the present invention, when the earth retention shoring plate is extended and connected above the earth retention shoring plate of the earth retention structure for ditching, the lower end of the connecting hole of the upper and lower earth retention shoring plates By fitting the upper and lower halves of the joining metal fittings to the top and top ends and locking and fixing them from the outside, the earth retaining support plate can be extended and connected easily, reliably and safely, so it can be attached to packets such as backhoes. When the packet is pressed from above into the soil, the pressing force of the packet is directly transmitted to the lower earth retention support plate, so the earth retention support plate can be pressed into the soil smoothly.

Furthermore, when dismantling a trench moat durable earth retaining structure, the entire extended and connected earth retaining support plate can be pulled up at once, which greatly contributes to improving work efficiency.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the earth retention method using trench trenching agent, Fig. 2 is a perspective view of the earth retention support board extended and connected by the joint structure of the present invention, and Fig. 3 is the joint structure of the earth retention support board according to the present invention. FIG. 5.5'...earth retaining support plate, 6...connecting hole, 10.10'...pin hole of connecting hole, 11.
...Screw hole, 12...Plate, 13゜13'...Pin hole of joining fitting, 14...
・Joining metal fittings, 15...Screw pin.

Claims (1)

[Scope of utility model registration request] Horizontal pin holes are drilled through both the front and back sides of the earth retaining support plate at the connecting ends of the plurality of vertical connecting holes drilled in each earth retaining support plate connected in the vertical direction. A plate with slotted holes is fixed on each side, and a joining fitting that drills pin holes horizontally at both the upper and lower ends is fitted to the connection end of the connection hole of the upper and lower earth retaining plates, and the mounting plate on either the front or back side is fitted. The feature is that the upper and lower earth retaining support plates are connected by inserting the screw pins into the pin holes at both the upper and lower ends of the joining metal fittings and screwing them into the screw holes in the plate. The joint structure of the earth retaining support plate.