JPS58160435A - Waling and back-filling work for underground continuous wall and waling rack-forming metal therefor - Google Patents

Abstract

PURPOSE:To attain the construction of waling rack by only the upper part of the waling by a method in which an L-shaped waling rack-forming metal having a coupling hook to the upper part of an H-shaped steel is coupled with the space between H-shaped steel waling and an underground wall, and then concrete is placed to form the rack. CONSTITUTION:L-shaped waling rack-forming metal 4 having large numbers of hooks 41a to be coupled with a waling 2 is provided on the bottom of the space 3 between an underground cntinuous wall 1 and the H-shaped steel waling 2 provided along the inner surface of the wall 1. Then, the space 3 is divided into proper intervals, cement mortar or concrete 7 is placed into each section, and hook metals 8 are soon buried in the upper layer of the cement mortar or concrete 7. By this, the formation of the waling rack can be attained only by operation from the upper part of the waling.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a backfilling method for backfilling an underground continuous wall and a metal fitting for forming a shelf for use in the method.

A raised shelf is provided at the bottom of the space between the underground continuous wall and a raised shelf placed on the inner wall surface of the continuous wall, and mortar or coscrete is poured into the corresponding rear leg space and filled and solidified. The restoration method of backfilling is being implemented. Conventionally, in such a backfilling method, as a means for forming a rising shelf, for example, as shown in FIG.
As shown in the figure, the wire mesh (h) as a shelf material is
) is supported by reinforcing bars (d) that are welded to the base. However, the former method requires the installation of a lifting machine to raise the formwork (α) to a predetermined height when forming the formwork, and if the excavation bed (A) is soft, it is necessary to install a lifting machine to support the formwork (α). Root hardening at the foot of the supporting post (-) (i)
Further, in places where the wall surface (a) has unevenness, it is time consuming to close the gap between the wall surface (a) and the formwork (a) with a wire mesh, which poses a big problem in terms of construction. Furthermore, the formwork (α) will eventually be dismantled, but this dismantling is very time-consuming and requires backfilling with rutar or cosikrete (!l) during dismantling.
There is a risk of parts of the machine falling, making work unsafe. In addition, since the latter method involves welding reinforcing bars, it requires a specialized staff such as a welder, leading to a rise in labor costs. had the disadvantage that welding work was difficult and time consuming. Furthermore, it is necessary to cut the reinforcing bars when removing the shelves, which not only makes it difficult to dismantle the shelves, but also poses a risk of the backfilling cosiclete falling during this disassembly, resulting in a lack of stability in the work. there were.

The present invention has been made for the purpose of eliminating the problems of the second class conventional construction method, and embodiments of the present invention will be described below with reference to the accompanying drawings.

When implementing the construction method of the present invention, the space (3) ( In order to form a raised shelf at the bottom of the (see FIG. 5), a raised shelf forming metal fitting as shown in FIGS. 3 and 4 is used.

The retractable shelf forming metal fittings (4) shown in FIG. A hook metal fitting (41) having a hook portion (41α) for (2α), a reinforcing reinforcing bar 0'4 that protrudes from the lower end of the hook fitting (41) toward the continuous wall (1), and a reinforcing reinforcing bar (4 Wire mesh (43) fixed to the rack using welding means etc.
The hardware (4) is manufactured in advance at a factory. In the figure, (44 is a reinforcing horizontal rod, which is provided as necessary.

The raised shelf forming metal fittings (4) shown in FIG. Two parallel hook rods (41α') with hook parts (41α') for
1A') (41h') at the lower end, a reinforcing reinforcing bar (42') inserted and supported by the lower end of the hook fitting (41'), and reinforcing reinforcing bar (42') 4
2') Consists of a wire mesh (to)') suspended on top of the 2'
Each component will be assembled at the construction site.

When forming a raised shelf using the metal fittings (4) shown in FIG. 3, as shown in FIG.
) At the upper end of the hook part (41α)..., with the hook part (41α) at the upper end of By pushing it in, it can be raised to form a shelf as shown in FIG. In this case, as shown in Fig. 3, a space (3
), and also make the width of this reinforcing bar () slightly shorter.
If the wire mesh (B) is extended outward from the tip of 44 to a large extent as wide as the width of the space (3), this overhang (48α) will be able to move the wire mesh (48α) to an appropriate location along the wall surface when pushed into the space (3). Since the upward bend comes into close contact with the wall surface, even if the wall surface is uneven or there is a dimensional error in the width of the space, the shelf can be restored without creating a gap and form a shelf.

In addition, when raising the metal fittings (4') shown in Fig. 4 to form a shelf, first raise the front and rear pair of the hook metal fittings 01') and attach the front and rear flange portions (2α) of 2). (2α
) facing the hook part (41α') K at the upper end, then raise the reinforcing reinforcing bar (42') to the hook hardware 01') that slightly protrudes downward from the lower end of 2). While inserting it between the lower ends of the continuous wall (1), push its tip up to the wall surface of the continuous wall (1) and set it. Restart in the same manner as below (
For 2), set the reinforcing bars (chord') sequentially in the length direction using the hook hardware 01'), then lay the wire mesh (4B') on the second grade reinforcing bar (Q') and tighten as necessary. By tying and fixing it using a wire or the like, it can be raised up to form a shelf as shown in FIG. This method of restoring metal fittings is installed on site, and the width of the wire mesh (invitation) and the protruding length of the reinforcing bars (42') can be freely adjusted, so that unevenness can be avoided, especially on the wall surface of the continuous wall (1). This is extremely useful in certain cases and in cases where the space (3) does not run straight along the length. As shown in FIG. 8, a sheet 5) that can prevent mortar from flowing away, such as a sheet made of polyethylene or polyvinyl chloride, can be laid on the raised shelf thus formed. Such a sheet (5) is not particularly required when pouring cosiclete.

After using the metal fittings (4) (or +4') to form a shelf at the bottom of the space (3),
The inside is partitioned off at appropriate intervals, for example about 1 to 1.5 m, using partitions (6). Although various materials can be used for the partition (6), a foamed polystyrene plate is particularly advantageous because it is lightweight and easy to handle.

Next, mortar or cosicrete is placed in the usual manner in each space partitioned by the partitions (6), and immediately after the placement, hook hardware (8) is placed on the mortar or cosicrete layer (7) at the lower end. Buried in part of the sea lion (8a). This situation is shown in FIG. 1O.

The hook hardware (8) may be provided at one location in the center for each lock, or may be provided at two locations on both sides as shown in the figure, or more than one location may be provided.

In this way, the construction method of the present invention can perform backfilling using mortar or cicrete.

On the other hand, if it becomes necessary to dismantle the backfill when removing the backfill, as shown in Figure 11, the backfill mortar or concrete layer (7) should be removed with hook hardware. (8) and pull it out from the space (3), then put the hardware (4) (or +4') back up in the reverse order of setting it up and remove it from 2). It is possible to achieve that purpose. In this case, for example, if the metal fittings (4) (or +4') are attached one by one to each block as one unit, the metal fittings (4) (or +4')
4') ') is extracted together with the mortar or concrete block, making the demolition work even easier. In the case of the metal fitting (4'), before removing the lock,
The reinforcing bar (戟') is removed from the hook hardware (41').

In the present invention, since the hook hardware is used to form a shelf by using a removable hook, the shelf can be formed from the top of the shelf. Not only can it be carried out with only 1 work, but it does not require any skill or experience at all.
Workability can be significantly improved, work efficiency can be improved, and construction period can be shortened.

Furthermore, when dismantling the back-filled mortar or cosiclete, pull out each block upwards, and restore the hardware (4) (or (4'l) at the same time or following this extraction. Since it can be removed and recovered from the stand, there is no danger of backfill mortar etc. accidentally falling during demolition, and the demolition work can be carried out safely and efficiently.

Furthermore, the recovered metal fittings (4) (or (a)) can be reused by simply making some changes such as replacing the wire mesh, so there is almost no wastage of material, and it is highly economical and can be used for backfilling. It can contribute to reducing construction costs.

[Brief explanation of the drawing]

1 and 2 are longitudinal cross-sectional views showing an example of the conventional construction method, respectively. FIGS. 3 and 4 are slope views of the metal fittings for forming a raised shelf used in the construction method of the present invention, and 5- Figure 6 is a vertical cross-sectional view showing a situation in which the metal fittings shown in Figure 3 are used to raise the shelf to form a shelf, and Figure 7 is a vertical sectional view showing the situation in which the metal fittings shown in Figure 4 are used to form a raised shelf. Fig. 8 is a vertical cross-sectional view showing the situation of the shelves, Fig. 8 is a longitudinal cross-sectional view showing the situation where sheets are laid on the raised shelf, Fig. 9 is a slope view showing the situation where a partition is provided in the backfill space, Fig. Fig. 10 is a slope view showing the situation of pouring the rutal or cosiclete and setting of hook hardware, and Fig. 11 is a slope view showing the situation during dismantling of backfilling. In the figure, (1) is a continuous wall, (2) is a raised shelf, (3) is a space, f41, f4') is hardware for forming a raised shelf, (
5) is a sheet, (6) is a partition, (7) is a mortar (or cosiclete layer), (8) is a hook hardware, and (9) is a wire. (And above) 11- Figure 1 Figure 2 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Scope of Claims] ■ A raised shelf is provided at the bottom of the space between the underground continuous wall and a raised wall disposed along the inner wall surface of the continuous wall, and mortar or cosiclete is installed in the corresponding hindlimb space. In the backfilling method, which involves pouring, filling and solidifying, a large number of removably hooked metal hooks are used at appropriate intervals in the length direction to create a shelf. Once the space is placed in a predetermined position, the space is divided at appropriate intervals in the length direction and mortar or concrete is placed in each space between the partitions. Immediately, hook hardware is placed into the mortar or cosiclete layer to anchor the lower end. A method of backfilling underground continuous walls that is partially buried. ■Multiple hooks are removably hung at the hook part at the upper end at appropriate intervals in the length direction on the backrest installed on the inner wall surface of the underground continuous wall. hardware,
The back of the underground continuous wall, consisting of reinforcing bars integrally or removably connected from the lower end of the hook hardware toward the underground continuous wall, and a wire mesh supported on the reinforcing bars to form a shelf. Metal fittings for forming a raised shelf used in the filling method.