JPS621075B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing a prefabricated earth retaining wall and an earth retaining wall construction trench excavating device used in the method. It is an object of the present invention to provide a method for constructing a prefabricated retaining wall in which the construction of retaining walls can proceed almost simultaneously, and a retaining wall construction trench excavation device used in the method.

This will be explained in detail below. The drawings show an embodiment, and Fig. 1 is a plan view of a construction trench excavation device used in the present invention, Fig. 2 is a partially longitudinal explanatory view, and Fig. 3 is a partially longitudinal sectional view of a wall member fitted with a hydraulic cylinder. It is an explanatory diagram.

The partition case 7 in this device is constructed by fixing two semicircular plates arranged side by side over the entire height of the inner surface of the case side plates 2 to the tips of both case side plates 2 formed into a pointed blade shape 1. Forming the screw guide 3,
A case front plate 4 is fixed to the appropriate rear part of the double screw guide 3 and extends over the entire height of the inner surface of both case side plates 2, like the screw guide, and is connected to the double screw guide 3, and furthermore, both case side plates 2
A bottom plate 5 is attached to the lower part of the case, leaving the rear part of the case in an open state.The partition case 7 is provided with a jack plate guide 6 located approximately at the center back of the case front plate 4, and both case side plates 2 each in close proximity to
A first hydraulic cylinder 9 having an integral outer case 8 is attached to the case front plate 4 in two rows in parallel, and a seal board 10 and a wall member guide mechanism 23 are provided at the rear end of the outer case 8. . This mechanism may be a guide roller or a guide shoe. A screw conveyor 12 having a drive motor 11 on its head is erected on the front side of the double screw guide 3, and this drive motor 11 and an adjustment mechanism A for the screw conveyor 12 provided in the partition case 7, That is, a hydraulic jack 21 for vertical movement and a hydraulic jack 22 for longitudinal movement are rotatably connected via a link 13.

Next, the prefabricated retaining wall member 20 (hereinafter referred to as the "retaining wall member") has a through connection hole 14, and a jacking plate 16 is rotatably attached to the front part of the inner case 15 in the connection hole 14. Further, a second hydraulic cylinder 19 having an outer case 18 with a reaction plate 17 formed in the front part is removably inserted therein.

Note that the jacking plate 16 may be attached to each hydraulic cylinder 19, or each jacking plate 16 may be attached to each hydraulic cylinder 19.
6 may be connected to each other. 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 20.

Excavation equipment and wall member 20 having the above configuration
To explain the method of constructing a retaining wall using the following, first, install an excavating device in the starting groove that has been excavated in advance, operate the first hydraulic cylinder 9, and excavate the rear wall of the rear end of the partition case 7. After solidifying and forming a reaction body, the first hydraulic cylinder 9 is contracted and the outer case 8
is moved forward and the wall member 20 is fitted and lowered between the two outer cases 8, that is, within the partition case. At this time, the jack plate 16 is fitted between the case front plate 4 and the jack plate guide 6.

When the work of fitting and lowering the wall member 20 is completed, the hydraulic cylinders 9 and 19 are operated, and at the same time, the drive motor 11 is driven to operate the screw conveyor 12. In such a case, the screw conveyor 12 excavates and carries out the earth and sand, and the outer case 8 of the first hydraulic cylinder 9 acts on the rear wall of the trench to move the entire device forward, and the second hydraulic cylinder 1
9 uses the reaction plate 17 to lower the wall member 20 from inside the partition case 7 into the groove. At this time, since this device has the above-mentioned configuration, even if the second hydraulic cylinder 19 is fully extended, a part of the wall member 20 will always remain inside the partition case 7, so that both sides of the partition case 7 The wall member 20, which is supported by the case side plate and the wall member guide mechanism, will not fall down within the groove.

Now, the advance of excavation is stopped at the position where the second hydraulic cylinder 19 is fully extended, the second hydraulic cylinder 19 is retracted, and its outer case 18 is advanced, and the outer case 18 is removed from the through connection hole 14 and further inserted into the partition case 7. It is taken out from inside and then inserted into the through connection hole 14 of the wall member as prepared. On the other hand, earth and sand are placed between the wall member 20 and the groove wall so that they are placed in the groove, and the first hydraulic cylinder 9 is operated to compact the earth and sand using its outer case 8. At this time, the wall members may be tilted to the left or right or the installation direction may be misaligned, so in such cases, the left and right first hydraulic cylinders 9 may be operated individually to adjust the consolidation of the earth and sand. You can modify these using

When the soil consolidation work is completed, the wall member 20 is lowered into the partition case 7 while inserting the jack guide plate 6 between it and the case front plate 4, and the same hydraulic cylinders and screw conveyor as described above are installed. The following operations are repeated to excavate the construction trench, install the wall members, advance the equipment, compact the earth and sand on both sides of the wall, adjust the posture of the wall members, etc., and bring the wall members into close contact with each other in the construction trench. and install it. This second
After the second installation work, the wall member also serves as a reaction force body for the second hydraulic cylinder 19, as it was installed before, and the reaction plate 17
It also has the effect of pushing the deflection wall member 20 backward and moving the device forward. Seal board 1 during main work
0 prevents dirt from entering the partition case 7, and the wall member guide mechanism 23 reduces contact friction between the outer case 8 and the wall member 20 to facilitate movement from inside the partition case. Also, jacking board 1
6 is rotatable, so even if the partition case 7 is tilted to some extent in the front, rear, left, and right directions during work, no strain will occur between the case front plate 4 and the jacking plate 16. The screw guide 3 serves to constantly adjust the attitude of the screw conveyor 12 to a predetermined position, and the sharp blade has the effect of smoothly excavating the side wall of the construction trench.

If it is necessary to dig deeply when excavating a construction trench, lower the vertical movement hydraulic cylinder 21 in the adjustment mechanism of the screw conveyor 12 and bring the longitudinal movement hydraulic cylinder 22 forward. The screw conveyor 12 moves forward and digs deeper, and when the vertical movement hydraulic cylinder 21 is raised, the screw conveyor 12 digs shallower. In this way, when the required number of wall members are installed in the construction trench, reinforcing bars or steel frames are passed through the through-connecting holes 14 of the wall members 20 and concrete is press-fitted into the through-connecting holes 14 to completely integrate the wall members. Construct the intended retaining wall.

When using the method of constructing an earth retaining wall using the construction trench excavation equipment with the above configuration, even large earth retaining walls can be constructed without the need for vibration-free, noise-free large construction machinery, and the construction method can be easily removed from excavating the construction trench. This invention can be called an epoch-making invention because it has the great effect of making it possible to install and integrate walls extremely easily, continuously, and quickly in an integrated process.

[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 partially longitudinal explanatory view taken along the line X--X in FIG. 1 when a wall member is mounted, and FIG. The drawing is a cross-sectional view taken along line Y--Y in FIG. 2. Figure 4 is a schematic explanatory diagram showing the operation of the hydraulic cylinder and the movement of the wall member when the wall member is installed in a construction trench (excavation trench); A is the state immediately after it is placed in the partition case; B C shows the state when the hydraulic cylinder is fully extended, and C shows the state when the outer case is removed from the wall member.

Claims (1)

[Scope of Claims] 1 Two semicircular plates arranged side by side are fixed to the tips 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 plates 2 to form a double screw. A case front plate 4 is fixed to an appropriate rear part of the double screw guide 3, and a case front plate 4 is fixed to the entire height of the inner surface of both case side plates 2 like the screw guide. Furthermore, a bottom plate 5 is attached to the lower part of both case side plates 2, and the rear part of the case is in an open state. Furthermore, a jack plate guide 6 is provided on the back of the case front plate 4 to form a partition case 7, and then the side plates 2 are connected. A seal board 10 and a wall member guide mechanism 2 are provided at the rear end adjacent to the inner surface of the
A screw conveyor 12 having a drive motor 11 on the head thereof is mounted on the front of the double screw guide 3. An adjustment mechanism A is provided above the partition case 7 to adjust the height and longitudinal inclination of the screw conveyor 12, and the adjustment mechanism A and the drive motor 11 can be rotated via a link 13. to form an excavation device for an earth retaining wall construction trench, and install the device in a starting trench excavated in advance,
On the other hand, a second hydraulic system has an outer case 18 having a through connection hole 14, a jack plate 16 rotatably attached to the front part of the inner case 15 in the connection hole 14, and a reaction plate 17 formed in the front part. A box-shaped retaining wall member 20 having a structure in which a cylinder 19 is removably inserted is inserted into the partition case 7 of the excavation device, and a jacking plate 16 is inserted between the case front plate 4 and the jacking plate guide 6. After fitting and lowering, the screw conveyor 12 is rotated by the drive motor 11 to excavate and discharge the earth and sand, and at the same time, the first and second hydraulic cylinders 9, 19 are operated to install the retaining wall member 20 in the trench and construct the retaining wall. The trench is excavated and the device is moved forward at the same time. Then, earth and sand are poured into the construction trench on both sides of the retaining wall member 20, and the first hydraulic cylinder 9 is operated to compact the earth and sand with its outer case 8. The earth retaining wall member 20 having the above structure is placed in the partition case 7, and the work of installing the earth retaining wall member 20 in the construction trench by the same operation as described above is repeated, so that the earth retaining wall member 20 is continuously and tightly erected. The wall members 20 are formed by penetrating the connecting reinforcing bars or steel frames into the through-holes 14 and press-fitting concrete.
A prefabricated retaining wall construction method characterized by integrating the following to construct a required retaining wall. 2. A double screw guide 3 is formed by fixing two semicircular plates arranged side by side over the entire height of the inner surface of the case side plate 2 to the tips of both case side plates 2 formed into a pointed blade shape 1. , a case front plate 4 is fixed to the appropriate rear part of the double screw guide 3, covering the entire height of the inner surface of both case side plates 2, like the screw guide, and connected to the double screw guide 3, and A bottom plate 5 is attached to the lower part of the side plate 2 to leave the rear part of the case open, and a jack plate guide 6 is provided at the back of the case front plate 4 to form a partition case 7. A seal board 10 and a wall member guide mechanism 2 are installed at the rear end.
A screw conveyor 12 having a drive motor 11 on the head thereof is mounted on the front of the double screw guide 3. is set upright, and an adjustment mechanism A is provided above the partition case 7 to adjust the height and front and rear inclination of the screw conveyor 12.
and a drive motor 11 are rotatably connected via a link 13.This retaining wall construction trench excavation device is used for constructing a prefabricated retaining retaining wall.