JPH0211469Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is an earth retaining device that is temporarily installed in an excavated trench to prevent the walls of the excavated trench from collapsing and make the work safer when burying telephone lines, etc. Regarding.

Conventional technology In the past, when earth retaining an excavated trench, as shown in Fig. 5, the inner surfaces of the sheet piles y, y, which are stood side by side along both side wall surfaces w, w, in the excavated trench m are raised h, h, respectively. were attached in a perpendicular manner, and the sheet piles y on both sides were pressed against the wall surfaces w on both sides via the uprights h using a cut beam k suspended between the uprights h on both sides.

Problems to be solved by the invention: In the case of the above-mentioned earth retaining means, each separated member is assembled within the excavation groove m, so the trouble of temporarily installing it within the excavation groove is complicated, and the assembled structure becomes unstable. The dot was hot.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide an earth retaining device that can simplify the temporary installation process and stabilize the installation state in an excavated trench.

Means for Solving the Problems The present invention provides a method for pressing sheet piles on both sides of an excavation trench, which are attached vertically to both side walls of the excavation trench and arranged in the longitudinal direction of the excavation trench, toward the walls. The earth retaining device is installed inside the earth retaining device, in which a pair of left and right side frames are installed oppositely to each of the side walls to be lined up through the sheet piles, and the same side frames are installed between the two side frames. The sheet piles are releasably connected to each other through an appropriate number of stretchable tension members for pressing in opposite directions, and the sheet piles are releasably connected to the outer surfaces of the side frames. a holding member that is movable laterally for assembly and has an opening for penetrating the sheet pile; and a rotating operation for the holding member to push and release the holding member. The gist of the present invention is to provide an earth retaining device with locking members that are arranged opposite each other.

(Function) The device of the present invention is constructed by assembling a pair of left and right side frames that are arranged side by side on both side walls of an excavation trench, and a tension member that is removably stretched between the side frames. The structure is such that the sheet piles are assembled into a unit and installed in the excavation trench with the sheet piles assembled to the frames on both sides to protect both side wall surfaces of the excavation trench.

Embodiment Next, an embodiment of the present invention will be explained with reference to the drawings. In the figure, 1 is an excavated trench excavated for burying a pipe K into which a telephone line etc. is inserted; 2, 2 are excavated trenches; In an earth retaining device D temporarily installed in an excavated groove 1 to retain earth in the excavated groove 1, both side wall surfaces 1a of the excavated groove 1,
Left and right 1 installed opposite each other to be arranged side by side on 1a
A pair of side frames, each with upper and lower horizontal frame rods 2a,
2a and front and rear vertical frame rods 2c, 2d are framed to form a horizontally long rectangular frame.

Reference numerals 3 and 3 refer to both side frames 2, which are horizontally stretched between the front and rear ends of the both side frames 2 in order to connect the both side frames 2 in a left-right parallel manner so that the interval can be expanded and contracted, and to press the both side wall surfaces 1a. It is a pair of front and rear tension members stretched between the left and right connecting rods 3b, 3b, which are each extended and contracted by an operation lever 3a via a ratchet mechanism, and are screwed together in a butt-like manner. Fitting pieces 3c to 3c are fixed to both outer ends of the tension member 3, respectively, and upper and lower pairs of locking pieces 4 are fixed to the inner surfaces of the front and rear vertical frames 2c, 2d of the side frames 2, respectively, in a vertically opposed manner. - 4, respectively, and the both side frames 2 and both tension members 3 are releasably connected, and the both side frames 2 are assembled in a box shape so that they can be disassembled.

Reference numerals 5 to 5 refer to sheet piles that are installed in an upright manner on both side wall surfaces 1a of the excavated trench 1 in order to protect both side wall surfaces 1a, and arranged in the longitudinal direction within the excavated trench 1 so as to stand side by side facing each other. , 6A to 6A are attached to the vicinity of the front and rear ends of the upper surface of the upper horizontal frame rod 2a of both side frames 2 so as to be horizontally movable to the side, respectively, in order to detachably assemble the sheet piles 5 to both side frames 2. The rectangular frame-shaped upper holding members 6B to 6B are similarly attached to the vicinity of the front and rear ends of the upper surface of the lower horizontal frame rod 2b of the both side frames 2 so as to be horizontally movable to the sides of each upper holding member 6A. Support members 7 to 7, which are rectangular frame-shaped lower holding members placed opposite to each other at the bottom, are fixed in parallel to both side frames 2, respectively.
It is slidably inserted and supported against the
Openings 8 to 8 are formed in the vicinity of the outer ends of each pair of upper and lower retaining members 6A, 6B and the outer surfaces of both side frames 2, respectively, and are opened in a vertically opposed manner. It can be inserted vertically into the pair of openings 8, respectively.

9 to 9 press and release the upper and lower retaining members 6A and 6B to press and release the upper and lower retaining members 6A and 6 for each sheet pile 5;
In order to lock or release the pressed state of B,
This is a locking member that is placed opposite to each pair of upper and lower holding members 6A and 6B and is rotatably attached to the vicinity of the front and rear ends of both side frames 2, and is attached to the upper and lower horizontal frame rods 2a of both side frames 2, Vertical pieces 9 inserted through each pair of support members 10 to 10 fixed vertically in series to the outer surface near the front and rear ends of 2b.
a, and a pair of upper and lower horizontal pieces 9b, 9c extending laterally near the upper and lower ends of each vertical piece 9a, respectively, and furthermore, a square piece is provided near the base end of each upper horizontal piece 9b. A plate-shaped operating piece 9d is provided in a protruding manner, and each vertical piece 9a is inserted into each pair of upper and lower openings 8, while each upper horizontal piece 9b is inserted into each upper holding member 6A. Each of the lower horizontal pieces 9c is arranged so as to be horizontally rotatable, and each of the lower horizontal pieces 9c is arranged so as to be horizontally rotatable within each of the holding members 6B. Then, the locking member 9 is rotated by a rotating operation handle (not shown) that is engaged and disengaged from the operation piece 9d, and the upper and lower horizontal pieces 9b and 9c are connected to the upper and lower holding members 6A and 6B.
When the upper and lower retaining members 6A and 6B of each pair are respectively released and the upper and lower retaining members 6A and 6B are rotated so as to be substantially parallel to the inner pieces 11 to 11 that are horizontally suspended at the inner ends of the The lock member 9 is allowed to move horizontally in the upper and lower horizontal pieces 9, and the sheet pile 5 can be inserted into the enlarged openings 8 of the upper and lower pairs.
When the upper and lower horizontal pieces 9b and 9c are rotated so as to be substantially orthogonal to the inner piece 11, the upper and lower horizontal pieces 9b and 9c push the inner pieces 11 of the upper and lower holding members 6A and 6B inwardly, thereby closing the upper and lower openings 8. are narrowed synchronously, and the sheet piles 5 inserted into the upper and lower openings 8 are held down to the side frame 2 by the upper and lower holding members 6A and 6B.

Reference numerals 13 to 13 are stoppers protruding near the front and rear ends of the upper surface of the upper horizontal frame rod 2a of both side pieces 2 in order to define the rotation end of the lock member 9, and when the lock member 9 is rotated, The upper horizontal piece 9b turns from the dead point angle perpendicular to the inner piece 11 of the upper holding member 6A to an angle slightly exceeding the angle and comes into contact with the stopper 13, and the holding state of the holding members 6A and 6B against the sheet pile 5 is maintained. Locked.

14 to 14 are projecting parts on the upper surface of the front and rear ends of the upper horizontal frame rods 2a of the both side frames 2, respectively, in order to hang the chain 15 when suspending the earth retaining device D installed at a predetermined position in the excavated groove 1. After suspending and positioning the frame 2 on both sides with the chain 15, the operating lever 3a is swung outside the groove to extend the tension member 3. It is stretched between the both side frames 2, and the both side wall surfaces 1a of the excavated groove 1 can be pressed in opposite directions by the both side frames 2 via the sheet piles 5.

Next, the operation and effects of the embodiment having the above configuration will be explained.

Now, in this example, left and right 1 are installed in parallel to both side wall surfaces 1a of the excavated trench 1 through sheet piles 5.
The pair of side frames 2 are releasably connected via a pair of front and rear tension members 3 that are extendably stretched in order to press the same side frames 2 in opposite directions between the same side frames 2. , an opening 8 is provided in the side frame 2 so as to be movable laterally relative to the side frame 2 in order to releasably hold the sheet pile 5 against the outer surface of the side frame 2, and for penetrating the sheet pile 5. Each pair of upper and lower holding members 6A, 6B with openings, and each holding member 6 for pushing and releasing each holding member 6A, 6B, respectively.
A and 6B are each provided with a locking member 9 which is rotatably opposed to the locking member 9.

For this reason, when earth retaining work is carried out in the excavated trench 1, the earth retaining device D, which is made into a unit by connecting the side frames 2 with the tension members 3, is inserted into the excavated trench 1, the sheet pile 5 is inserted into the opening 8, and the locking is performed. The earth retaining device D can be easily installed in the excavated groove 1 by rotating the member 9 outside the trench to assemble the sheet pile 5 to the side frame 2, and by extending the tension member 3 outside the trench. Excavation groove 1 of earth retaining device D
In addition to simplifying and speeding up the installation work inside, the sheet piles 5 are assembled to both side frames 2, and lateral pressure is applied to both side frames 2 having an expanded effective pressing area against both side wall surfaces 1a of the excavated trench 1. Therefore, the installed state of the earth retaining device D in the excavated trench 1 is stabilized, and both side wall surfaces 1a are appropriately protected, so that the safety of construction work in the excavated trench 1 can be improved.

In addition, in this example, the earth retaining device D, in which a pair of side frames 2 and a pair of tension members 3 are assembled, can be installed in the excavation trench 1 as one unit, so while excavating the excavation trench 1, Each of the earth retaining devices D can be sequentially installed in the excavated trench 1 so that the side frames 2 are adjacent to each other and temporarily installed, which has the effect of simplifying the earth retaining work.

Furthermore, the upper and lower pressing members 6A, 6 for the sheet pile 5
Since the restrained state of B can be locked and unlocked by operating the locking member 9, the retaining device D can be locked and unlocked by operating the locking member 9.
With the lock member 9 inserted inside, the locking member 9 can be rotated outside the groove to hold the sheet pile 5 to the side frame 2 or released from the side frame 2, and the tension member 3 can be expanded and contracted outside the groove. Therefore, the temporary construction of the earth retaining device D can be made safer, and the earth retaining device D can be easily adjusted up and down and positioned within the excavated trench 1.

In addition, an appropriate number of sheet piles are added and erected between both the front and rear sheet piles 5 in accordance with the condition of the ground where the excavated trench 1 has been excavated.

Effects of the invention In other words, the present invention has a structure in which the sheet piles on both sides, which are attached upright to both side walls of the excavation trench and arranged in the longitudinal direction of the excavation trench, are mounted in the excavation trench in order to press them toward the walls. In the earth retaining device to be suspended, a pair of left and right side frames are provided oppositely to each other to be lined up via the sheet piles on both side walls, and the same side frames are moved in opposite directions between the both side frames. In order to connect releasably through an appropriate number of stretchable tension members for pressing, and to releasably assemble the sheet pile to the outer surface of the side frame on the both side frames. a holding member that is movable laterally and has an opening for penetrating the sheet pile; and a holding member that is rotatably opposed to the holding member in order to push and release the holding member. By attaching these locking members, it is possible to simplify the installation work of the earth retaining device in the excavated trench, and also to stabilize the installation state in the excavated trench and improve the protection performance against the excavated trench. It has a moisturizing effect.

[Brief explanation of the drawing]

Figures 1 to 4 show one embodiment of the present invention. Figure 1 is a plan view of the earth retaining device, Figure 2 is a view taken along the line X-X in Figure 1, and Figure 3 is an earth retaining device. Figure 4 is an enlarged perspective view of the main parts, Figure 5 is a front view showing how the device is used.
The figure is a front view showing a conventional earth retaining means. 1... Excavation groove, 1a... Wall surface, 2... Side frame, 3
...Tension member, 5... Sheet pile, 6A, 6B... Holding member, 8... Opening, 9... Lock member, D...
...Earth retaining device.

Claims (1)

[Scope of utility model registration request] An earth retaining device installed in an excavation trench for pressing sheet piles on both sides, which are attached to both side walls of the excavation trench in an upright manner and arranged in the longitudinal direction of the excavation trench, toward the walls, respectively. , a pair of left and right side frames, which are installed in parallel with each other through the sheet piles, are stretched so as to be expandable and retractable in order to press the same side frames in opposite directions between the two side frames. In addition to being releasably connected via an appropriate number of tension members that are suspended, the both side frames are movable laterally in order to releasably attach the sheet piles to the outer surfaces of the side frames. A holding member having an opening for penetrating the sheet pile, and a locking member rotatably opposed to the holding member for pushing and releasing the holding member are respectively attached. An earth retaining device characterized by: