JPS6127557B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing an earth retaining wall and an apparatus therefor, which enables the earth retaining wall to be constructed without installing large construction machinery on the ground, by excavating a retaining wall construction trench, and constructing the retaining wall. The object of the present invention is to provide a method and apparatus that allow the processes to proceed almost simultaneously.

This will be explained in detail below.

The drawings show an embodiment, and FIG. 1 is a plan view of the apparatus of the present invention, FIG. 2 is a partially longitudinal sectional view, and FIG. 3 is a sectional view taken along the line Y--Y in FIG. 2. The partition case 6 in this device consists of a screw guide 3 having a semicircular shape, case side plates 2, a case front plate 4, and a bottom plate 5. Inside, there is a jacking plate guide 11 on the inner side of both case side plates 2 at the rear of the case front plate.
Further, a screw conveyor adjustment mechanism A for adjusting the height and front/rear inclination of the screw conveyor 8 is provided above the partition case. Note that the rear part of the partition case is open. The screw conveyor 8 is erected at the front of the screw guide 3, has a drive motor 7 connected to its head, and is rotatably connected to the adjustment mechanism A via a link 9. Incidentally, the screw conveyor adjustment mechanism A shown in the drawings, which is an example, 20 is a hydraulic cylinder.

Next, the prefabricated retaining wall member 17 (hereinafter referred to as the "retaining wall member") has a box-like shape as a whole and has a through connection hole 10 for assembling the retaining wall member. A hydraulic cylinder 16 having a jacking plate 13 rotatably attached to the front part of the inner case 12 and an outer case 15 having a reaction plate 14 formed in the front part is detachably inserted therein. It's summery. Note that the jacking plate 13 may be connected by a connecting plate 18 which is detachable after the hydraulic cylinder 16 is inserted into the through hole 10. Further, the length from the case front plate 4 to the rear end of the partition case is always slightly longer than the length of the wall member 17.

Excavating equipment and wall member 17 having the above configuration
To explain how to construct an earth retaining wall using the following, first, install the excavation device in the starting groove that has been excavated in advance, and then insert the jacking plate 13 between the case front plate 14 and the jacking plate guide 11. While inserting the wall member 17, put it into the partition case 6. Next, the drive motor 7 is driven to rotate the screw conveyor 8 to excavate and discharge the earth and sand, and the hydraulic cylinder 16 is operated to remove the reaction plate 14 of the outer case 15.
``When the reel wall member 17 is pushed out into the excavation groove, the recess wall member 17 comes into close contact with the rear wall of the starting groove and obtains a reaction force that moves the excavation device forward.'' is added. At the same time, the jacking plate 13 applies a forward pressing force to the case front plate 4 to move the excavation device forward. hydraulic cylinder 16
When the outer case 15 is completely removed from the through connection hole 10 of the wall member 17, the jacking plate 13 acts on the jacking plate guide 11 to retract the hydraulic cylinder 16 and move the outer case 15 forward. Since the relationship between the length of the case from the case front plate 4 to the length of the wall member 17 is as described above, a portion of the wall member 17 remains inside the partition case 6, so that the earth pressure from both walls of the excavation trench is reduced. Case side plate 2
to prevent them from collapsing. Next, put the wall member 17 into the partition case 6 in the same manner as described above, and use the same operation as described above to erect the wall member 17 in the excavated groove while obtaining a reaction force from the wall member 17 as previously erected. Once several wall members 17 are erected, reinforcing bars or steel frames are passed through the through-connecting holes 10 and concrete is press-fitted into the holes to integrate the wall members 17 and construct an earth retaining wall. When excavating a construction trench, if you want to dig deep, you can push the screw conveyor adjustment mechanism A, that is, the link 9, forward by operating the cylinder 20 and tilt the screw conveyor 8 forward. When doing so, use the hydraulic cylinder 20
The screw conveyor 8 can be raised by extending the screw conveyor 8.

As described above, the construction of the intended retaining wall is completed by continuously carrying out the work of excavating the construction trench, erecting the retaining wall members, and connecting and integrating them.

Since the space between both sides of the constructed earth retaining wall and the construction trench (excavation trench) is extremely narrow, it will be filled in naturally and quickly by the earth pressure on both sides. When using the above-mentioned retaining wall construction method, there is no need for large machinery such as a shovel car to excavate a construction trench even in a narrow space, and only a small portion of the equipment, such as the drive motor, is exposed above the ground. This is an epoch-making invention that has the advantage that it does not interfere with other work, further increasing work efficiency, and that the wall construction is complete and there is no noise or vibration.

[Brief explanation of the drawing]

The drawings show an embodiment, and FIG. 1 is a plan view of the device of the present invention, FIG. 2 is a partial vertical cross-sectional view showing a wall member placed thereon, and FIG. 3 is a cross-sectional view taken along the line A-A in FIG. It is a diagram. Figure 4 is a perspective explanatory view showing a state in which the hydraulic cylinder is partially inserted into the wall member, and Figure 5 is the operation of the hydraulic cylinder when installing the wall member in a construction trench (excavation trench) and the wall member. These are schematic explanatory diagrams showing the state of movement of the members, where A shows the state immediately after being inserted into the partition case, B shows the state when the hydraulic cylinder is fully extended, and C shows the state when the outer case is removed from the partition wall member. It indicates the condition.

Claims (1)

[Claims] 1. A screw guide 3 is formed by fixing a semicircular plate to the tip of both case side plates 2 formed into a pointed blade shape 1 over the entire height of the inner surface of the case side plate 2. ,
A case front plate 4 is fixed to the appropriate rear part of the screw guide 3 over the entire height of the inner surface of both case side plates as well as the screw guide 3.
Furthermore, there is a bottom plate 5 at the bottom of both case side plates 2.
, the rear part of the case is in an open state, and a jack plate guide 11 is provided at the rear of the case front plate 4 and on the inner surface of both case side plates 2 to form a partition case 6. A screw conveyor 8 having a drive motor 7 is installed upright in the partition case 6, and a screw conveyor adjustment mechanism A for adjusting the height and front and back inclination of the screw conveyor 8 is provided above the partition case 6. A retaining wall construction trench excavating device configured by rotatably connected to a drive motor 7 via a link 9 is installed in a pre-drilled starting trench, and the other side is a box having a through connection hole 10. Shaped retaining wall member 1
An outer case 15 has a jack plate 13 rotatably attached to the front part of the inner case 12 in the through-connection hole 10 of No. 7, and a reaction plate 14 formed in the front part.
At the same time, insert the hydraulic cylinder 16 having a
1 and placed in the partition case 6 of the excavation device, and then the screw conveyor 8 is driven to excavate and discharge the earth and sand, and at the same time the hydraulic cylinder 16 is operated to create an earth retaining wall on the rear wall of the starting groove. The members are pressed against each other to obtain a reaction force to move the excavation equipment forward, and the excavation equipment is moved forward, and the prefabricated retaining wall member 17 is installed in the trench.Then, the hydraulic cylinder 16 is extracted from the partition case, and the construction is similar to that described above. Place the prefabricated earth retaining wall member 17 on the partition case 6, obtain a reaction force from the previously installed prefabricated earth retaining wall member 17, install it in the groove using the same operation as described above, and repeat this operation. The prefabricated retaining wall members 17 are erected closely and continuously, concrete is press-fitted into the connecting holes 10 through the connecting reinforcing bars or steel frames, and the various wall members 17 are assembled and integrated to construct the retaining wall. A prefabricated earth retaining wall construction method characterized by: 2. A screw guide 3 is formed by fixing a semicircular plate to the tip of both case side plates 2 formed into a pointed blade shape 1 over the entire height of the inner surface of the case side plate 2,
A case front plate 4 is fixed to the appropriate rear part of the screw guide 3 and connected to the screw guide 3, and a bottom plate 5 is attached to the lower part of both case side plates 2 so that the rear part of the case is in an open state. A jack plate guide 11 is provided at the rear of the case front plate 4 and on the inner side of both case side plates 2 to form a partition case 6, and then a screw conveyor 8 having a drive motor 7 is erected at the front of the screw guide 3. The screw conveyor 8 is installed in the partition case 6.
An assembly characterized in that a screw conveyor adjustment mechanism A for adjusting the height and front and back inclination of the screw conveyor is provided, and the adjustment mechanism A and a drive motor 7 are rotatably connected via a link 9. Earth retaining wall construction trench excavation equipment used for earth retaining wall construction.