JP3692476B2 - Construction method and dredging member to create a pit in the middle of a running water conduit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method for constructing a dredging pit that makes use of flowing water in the middle of a running water pipe of a water and sewage system, implementation of the method, and a dredging member used for construction in an existing pit.
[0002]
[Prior art]
With the progress of the long-distance propulsion method, the interval between pits for installing inspection manholes and branch pipes is gradually increasing in water supply and sewage pipe layout designs, but after installation, pits are provided in the middle of the conduit. It may create a need.
[0003]
In this case, (1) bypass method, (2) pump-up method, (3) sandbag topping method, (4) dredging replacement method, etc. can be considered, but the above methods (1) and (2) are flowing water. In the case of a conduit, the construction period until the completion of pit construction is long, and a large construction cost is required. The construction method (2) also has a problem of noise pollution.
[0004]
In addition, the methods (3) and (4) can be used when the flow rate is small, but cannot be used when the flow rate is high as in a main line.
[0005]
In addition, since the prior art document information which should describe about the construction method of said (1)-(4) is not owned, it cannot describe prior art document information.
[0006]
[Problems to be solved by the invention]
Therefore, the present invention has an object to provide a pit construction method in the middle of a running water conduit that requires a short construction period and low construction costs, and the implementation of the construction method, and a dredging member useful for construction in the pit. is there.
[0007]
[Means for Solving the Problems]
The present invention has been made to solve the above-mentioned problems. In the first invention, after providing a space around the conduit of the pit formation section, first, the length of the pit of the conduit is less than the inner length. After cutting and removing the half, and then installing the saddle-shaped saddle member with the lower surface in close contact with the inner surface of the conduit and with a stopper at the rear in the uncut portion of the conduit, creating at least the lower half pit In this construction method, the uncut portion of the conduit is cut and removed while leaving the receiving portion of the dredging member, and then the dredging member is removed to create a pit in the middle of the flowing water conduit.
[0008]
The second invention relates to the structure of the eaves member used when the first invention is carried out or for the work in the existing pit, and is provided with a watertight rubber in close contact with the conduit on the lower surface of the eaves-like main body. A bell mouth is provided with a bell mouth that guides the flowing water to the upper surface of the bowl-shaped main body at the edge, and a stopper that engages with the conduit at the rear edge.
[0009]
Further, the third invention is a scissor member that is divided and assembled to facilitate the mounting / removal of the scissors member used in the implementation of the first invention, and the fourth invention is a flow-shaped main body with a flow-shaped body. It is a gutter member configured to expand and contract in the direction or the width direction.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an explanatory view showing a pit creation process of an embodiment to which the present invention is applied. The work procedure will be described with reference to this figure as follows.
[0011]
In FIG. 1, 1 is a conduit using a fume pipe through which sewage flows, 2 is a gutter member, 3 is a pit, and first, as shown in FIG. Provide.
[0012]
Next, after the upper half 1a of the conduit 1 having a length equal to or shorter than the inner length of the pit 3 is cut as shown in (b), the remaining half-half conduit 1 has a bowl-like saddle member as shown in (c). Set 2 The structure of the eaves member 2 will be described later with reference to enlarged views shown in FIGS.
[0013]
After the lower half 3a of the pit 3 is formed as shown in (d), backfilling around the formed pit is performed as shown in FIG.
[0014]
When the formation of the lower half 3a of the pit 3 is completed, the end cut portion 1b of the conduit 1 is cut and removed with a wire cutting machine, leaving the receiving portions 1c and 1c of the flange member 2 as shown in (f). Next, after removing the eaves member 2 as shown in (g), the upper half 3b of the pit is created as shown in (h) to complete the pit creation.
[0015]
In the pit creation step, the pit 3 is created after the saddle member 2 is installed in the conduit 1. However, the saddle member 2 may be installed after the pit 3 is created. However, as shown in the drawing, the procedure of attaching the scissors member first is preferable because the operation is easier.
[0016]
As can be easily understood from the above description, according to the construction method according to the present invention, even with a running water conduit, as in the construction method of (1), a bypass route that requires enormous construction and days can be provided, As in the method (2), only the construction around the pit building is required without requiring a large capacity or a large number of pumps. Therefore, it is possible to obtain a special effect in civil engineering work in which the construction period and the construction cost can be reduced.
[0017]
2 to 5 are enlarged views showing details of the eaves member 2 used in the embodiment shown in FIG. 1, FIG. 2 is a plan view, FIG. 3 is a longitudinal sectional view, FIG. 4 is a side view, and FIG. It is sectional drawing which shows the structure of an edge.
[0018]
The saddle member 2 of this embodiment is an extension panel 22, 22 composed of four panels 21, 21, 21, and a pair of panels 22 a, 22 a provided with a frame 21 a on the lower surface periphery. And a bell mouth 23 provided on the front edge, and a girder 24 for reinforcement and lifting / suspending, and is structured to be assembled by a coupling tool such as a bolt and a nut.
[0019]
And the watertight rubber | gum 25 is attached to the lower surface of a bowl-shaped case so that it may closely_contact | adhere to the inner surface of the flowing water conduit 1, and the stopper 26 engaged with the cut part of the flowing water conduit 1 is provided in the downstream of the extension panel 22. ing.
[0020]
The dredge member 2 configured as described above is in close contact with the inner surface of the flowing water conduit 1 by the water pressure of the flowing water, and the flowing water does not leak while cutting the uncut portion 1b of the lower half of the flowing water conduit 1 with a wire cutting machine. However, when the flow rate is small and the water pressure is small, for example, as shown by an imaginary line in FIG.
[0021]
As is clear from the above description, the present invention introduces a new idea of using the water pressure of the flowing water flowing in the conduit 1 to cause the dredging member 2 to be installed in close contact with the pit formation portion, thereby providing a conduit for flowing water, For example, it is possible to create a dredging pit that makes use of the flow in the middle of a sewer pipe, and it can be implemented with much lower construction costs compared to conventional methods. It is extremely important to contribute to civil engineering work.
[0022]
Although the eaves members shown in FIGS. 2 to 5 are divided and assembled, they may be of a type that is laid in a conduit and expands and contracts in the direction of flow and width to facilitate removal.
[0023]
In this example, the dredging member was used to create a pit in the middle of a running water conduit. However, in the construction of an existing pit, for example, when a sluice is constructed at the entrance of a branching conduit in a pit with a branching passage. Can be used for etc.
[0024]
【The invention's effect】
It is possible to create a pit in the short run along the running water conduit, which is effective in reducing construction costs.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a construction procedure in an embodiment of the present invention.
FIG. 2 is a plan view of a gutter member inserted into a half-cut running water conduit.
3 is a longitudinal sectional view of FIG.
4 is a partially cutaway side view of FIG. 2. FIG.
FIG. 5 is an enlarged longitudinal sectional view showing details of a lower structure of the flange member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Conduit 2 Anchor member 3 Pit 4 Support work 21 Panel 21a Frame 22 Additional panel 23 Bell mouth 24 Girder 25 Watertight rubber 26 Stopper

Claims (4)

After providing a space around the conduit of the pit building, first, the upper half of the conduit pit is cut and removed, and then the lower surface is in close contact with the inner surface of the conduit and at the rear. After mounting the hook-shaped hook member provided with the stopper in the uncut portion of the conduit and creating the pit of at least the lower half, the uncut portion of the conduit is cut and removed leaving the receiving portion of the hook member, Next, a construction method for creating a pit in the middle of a running water conduit characterized by removing the dredging member. A watertight rubber that is in close contact with the conduit is provided on the lower surface of the bowl-shaped body, a bell mouth that guides the flowing water to the upper surface of the bowl-shaped body is provided on the front edge, and a stopper that engages with the conduit is provided on the rear edge. Characteristic scissors member. The scissors member according to claim 2, wherein the scissors-shaped main body is divided and assembled. The scissors member according to claim 2, wherein the scissors-shaped main body is configured to expand and contract in the flow direction or the width direction.

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