JPS63226409A - Sheathing timbering work and temporary bar receiver - Google Patents

Abstract

PURPOSE:To exactly and quickly set walings by using a temporary waling bar receiver having hook parts on its both ends and waling positioning pieces near its both ends. CONSTITUTION:A trench is excavated in the ground to form the trench wall 7 by cutting, and an expandible waling bar receiver 8 having hanging hooks 9 at both ends and walling positioning pieces 10 near both ends is hung down in the trench. Walings 2 are set on both sides of the receiver 8 and a sheathing plate 11 is erectly set in the aperture between the trench wall 7 and the walings 2. An expandable shore strut 5 is set and extended between the left and right walings 2. The walings 2 can thus be exactly and quickly set without rocking.

Description

DETAILED DESCRIPTION OF THE INVENTION (Objective) The present application mainly relates to improvements in small-scale construction among earth retaining shoring systems for preventing the collapse of cut-up ground. That is, it is used when burying communication cables, water pipes, etc.

(Prior art) Generally speaking, the standard for earth retaining shoring is to first drive sheet piles and then excavate them before excavating the ground surface. When burying sewer pipes that are not large in diameter, productivity has conventionally been improved by constructing them using the method shown in FIG. 3, unless the soil is extremely soft.

That is, as shown in (a), the ground is excavated, and then, as shown in (b), the horizontal members 1 are hung between the left and right groove walls as shown in the figure, and the uprights 2 are suspended with chains 3. Drive the sheet piles 4 along the freshly cut ground of the trench as shown in c), and (d)
As shown in FIG. 2, a method of extending the left and right abdominal ribs 2 by horizontally disposing a retractable cutout 5 was adopted.

By the way, the use of telescopic equipment as the cutter 5 greatly contributed to improving the productivity on site, but it had the following drawbacks. First of all, since the belly stand 2 is suspended from the horizontal member 1 by the chain 3, it is difficult to keep the height of the belly rise 2 constant (the level of the left and right pair of belly rises 2 was inaccurate.Next As the pile 4 sways, it is difficult to drive the sheet pile 4, and it is also difficult to drive the sheet pile accurately, which may cause damage to the pile 2 by touching it.As a result, the pile 2 shakes, It was difficult to set the cutting tension 5, and the stretching work by pouring water into the cylinder of the cutting tension 2 was unstable and dangerous.The present application eliminates all of the above-mentioned drawbacks and provides a stable and accurate construction method. .

[Structure of the invention]

First of all, in order to solve the problem, we adopted a temporary support rod (hereinafter referred to as temporary support rod) as an auxiliary equipment for this method in order to prevent the swing of the support and make the position of the set accurate. It is something.

The temporary receiving rod body 8 consists of an outer cylinder and an inner cylinder that is slidably inscribed in the outer cylinder. A plurality of pin holes are opened in the upper surface of the inner cylinder at appropriate pitches in the longitudinal direction, and A rod body whose length can be adjusted by means such as providing a long hole in the longitudinal direction into which a stopper pin is inserted is adopted on the surface, and a hook member is installed to hang the rod body in the groove that has been excavated. This problem is solved by using temporary receiving rods attached to both ends of the rod so that the vertical position can be adjusted. The process will be described below with reference to the drawings based on an example.

(Example) In FIG. 1, as shown in Drawing A, the ground is excavated by a conventional method to form a deep groove, and the groove walls 7 are cut up to form a groove space 6 in the longitudinal direction.

Next, as shown in FIG. By placing the horizontal pieces 9' of the hook portion 9 on the left and right groove walls 7.7', the temporary holding rod 8 is suspended between the groove walls. The temporary receiving rod shown in FIG. 1 uses a temporary receiving rod described later, and the expansion and contraction mechanism of the temporary receiving rod 8 is not shown. Furthermore, the means for attaching the hook members 9 to both ends of the temporary receiving rod body 8 is a pivot support, and the horizontal piece 9' of the hook member 9 is connected to the vertical piece by the pivot support. However, it is not limited to a shaft support.

Next, as shown in FIG.
0 on both left and right ends of the temporary receiving rod 8. At this time, the positioning piece 10 is erected so that there is a gap sufficient to insert the earth retaining plate 11 between the riser 2 and the groove wall. Note that in the embodiment, a rib with a rectangular cross section is used.

Next, as shown in the first diagram, the earth retaining plate 11 is inserted along the groove wall 7 between the groove wall 7 and the uprights 2. In this case, earth retaining board 11
A small and lightweight sheet pile is used as the retaining board 11, but in many cases the sheet pile does not need to be deeply embedded in the trench bottom.In addition, there is little need for parallel sheet piles to bite into each other and connect. There are many.

Next, as shown in FIG.
2.2') between the left and right sides, then set the cut tension 5.
After water is injected into the cylinder by a pump (not shown) to extend the shear 5, the temporary support rod 8 is removed, and the earth retaining shoring is completed.

However, the temporary holding rod body 8 may be removed by suspending the belly raiser 2 from the retaining plate 11 with a chain in the previous step.

Subsequently, details of the temporary support rod 8 used in the earth retaining shoring described above will be explained with reference to FIGS. 2(A) and 2(B).

In the figure, the temporary receiving rod body 8 consists of a rod body 8' and a pair of left and right hook members 9. The rod body 8' consists of an outer cylinder 12 made of an aluminum alloy cylinder and an inner cylinder 13 made of the same material, and the inner cylinder 13 is slidably inscribed in the outer cylinder 12. A plurality of bottle holes 14 are opened in the upper surface of the inner cylinder 13 in the longitudinal direction at appropriate pitches, and a long hole into which a stopper pin 16 is inserted is opened in the upper surface of the outer cylinder 13 in the longitudinal direction. .

Note that 17 is fixed to the collar as a stopper seat for the stopper pin. With the above mechanism, the temporary holding rod 8 selects the pin hole for length adjustment so that it is almost the same as the inside dimension of the groove, and finally the stopper pin 16 follows this when the cut tension 5 is extended.
By moving within the long tag, the desired length can be achieved. Note that it is preferable that the stopper pin 16 is locked to the outer periphery of the outer cylinder 12 with a chain or the like so that it does not come off.

The hook member 9 of the embodiment has an inverted shape when viewed from the front, and consists of a vertical piece and a horizontal piece 9', both of which are made of aluminum alloy, and the vertical piece has a channel-shaped cross section, and the horizontal piece 9' also has a channel shape. The vertical piece of the channel has pin shaft holes 18 for clamping and pivotally supporting the ends of the temporary receiving rod 8 at a constant pitch in the vertical direction. In the illustrated example, the temporary receiving rod 8 is pivotally supported at exactly an intermediate position in the vertical direction. The end of the horizontal piece 9' is pivotally supported by the vertical piece so that it can rotate freely. In the figure, a lever 19 pivotally supported by the vertical piece is attached to the upper surface of the horizontal piece 9'. It is locked by a notch 20 provided. In the vicinity of the end of the temporary receiving rod body 8, a positioning piece 10 of the belly riser 2 is provided upright. And, when the belly riser 2 is placed on the temporary receiving rod body 8, it is set so that there is a slight play between the hook member 9 and the positioning piece 10.

In the illustrated example, reference numeral 11 is a sheet pile made of aluminum alloy, and semicircular rings 21 provided on the lower surface of both ends of the temporary receiving rod body 8 allow the lower tier upright 2' to be suspended. Furthermore, the round pipe 22 welded perpendicularly to the end of the horizontal piece 9' of the hook member 9 is a member intended for stability to prevent the temporary receiving rod body 8 from swinging.

Note that when the hook member 9 is used only for use with a specific size, the hook member 9 may be fixed integrally with the rod body 8'.

Fig. 4 shows a different means for vertically adjusting the horizontal piece 9' of the hook member 9, in which a round vibrator 9# that can circumscribe and slide around the vertical piece 9 made of a round pipe is attached to one end of the horizontal piece 9'. Figure 4 (
(b) As in (fixed).

The vertical piece 9 is provided with a plurality of via holes at appropriate pitches, and on the other hand, a via hole is provided on the outer periphery of the sliding vibrator 9'' attached to the horizontal piece 9', so that the per bin 16 passes through it. be.

(Effects) According to the present application, all the drawbacks of conventional earth retaining shoring are eliminated, and the upright can be installed accurately and quickly without rocking. Also, driving and erecting sheet piles becomes easier, and as a result, the work of setting and extending the shear tension can be done easily and accurately, and since the shear tension sets are large in quantity, it greatly contributes to improving the productivity of earth retaining shoring. It is.

It is also extremely effective for large-scale construction work in which sheet piles are driven and interconnected.

[Brief explanation of the drawing]

FIG. 1 is an explanatory front view showing the process order of the present application. A
, BSC, D, and E are front views in respective steps. Figure 2 corresponds to a partially enlarged view of Figure 1 and is a detailed view of the main parts of the present application, Figure 2 (A) is a plan view, Figure 2 (B)
is a front view. Figure 3 is an explanatory process diagram of the conventional method, showing (a), (b), and (c).
(D) is a front view in each step. FIG. 4(a) is a different embodiment of the hooking member, and FIG. 4(b) is a perspective view of the horizontal piece. 2 Raising 11 Retaining plate 4 Sheet pile 12 Outer cylinder 5 Cutting 13 Inner cylinder 7 Groove Wall 14 Bottle hole 8 Temporary receiving rod body 15 Long hole 8' rod zero body 16 Stopper pin 9 Hooking member 18 Bottle shaft hole 10 Raising positioning piece 22 Maru Vibe Patent Applicant Nippon Light Metal Co., Ltd. Representative Patent Attorney Masaaki Kato

Claims (3)

[Claims] (1) A retractable girder with a groove dug in the ground and a groove wall (7) cut upright, with hook members for hanging at both ends, and a girder positioning piece erected near both ends. Suspend the temporary support rod (8) in the groove by spanning the hooking member between the left and right groove walls, and raise the temporary support rod (8) almost above both ends of the temporary support rod. Place it on the groove wall (7)
This is an earth retaining shoring construction method in which a retaining board is erected in the gap between the left and right uprights, and a retractable cut bar (5) is set between the left and right uprights to extend it. (2) A telescopic tube consisting of an outer cylinder (12) and an inner cylinder (13) slidably movably inscribed in the outer cylinder, the inner and outer cylinders being provided with positioning means that are slidable relative to each other between the two cylinders. The rod body (8') has an inverted L-shaped hook member (9) attached to each end thereof for hanging the rod body, and a positioning piece for raising the rod body near both ends of the rod body (8'). (10) A temporary support rod exclusively used for earth retention shoring constructed by erecting. (3) As positioning means that can slide against each other, a plurality of pin holes are opened in the longitudinal direction on the upper surface of the inner cylinder, and a long hole into which a stopper pin is inserted is provided on the upper surface of the outer cylinder, and the rod body (8') is hooked. The temporary support rod body according to claim (2), which is pivotally supported by the member (9) so as to be adjustable in the vertical direction.