JPH02229984A - Embedding method for city water pipe - Google Patents

Abstract

PURPOSE:To eliminate excavation of a ground by a method wherein a main work pit is excavated in the position of a main city water pipe to which a branch city water pipe is coupled, an auxiliary work pit is excavated in a housing site, a ground between the two pits is excavated through injection of high pressure water to embed a guide embedding pipe. CONSTITUTION:When a city water pipe branched from a main city water pipe 1 is embedded in a ground 3 fronting on a road 2 or located slightly away therefrom, a main work pit 4 and an auxiliary pit 5 are excavated. An excavator 6 is disposed, and an excavation hole 10 having size slightly larger than a city water pipe 7 is excavated. The excavation is effected by means of a high pressure jet nozzle 62, and guide pipes 65 are additionally connected in order. Earth and drain are discharged with the aid of a pump 9. A branch city water pipe 7 is inserted in the guide pipe 65 and connected to the main city water pipe 1 and a water meter 8. This method eliminates excavation effected from a ground by damaging a pavement more than is necessary and also reduces a construction cost.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention can easily connect branch water pipes from main water pipes to residential units without destroying existing paved roads or moving excavated soil. This is related to the method of burying the underground.

[Conventional technology]

Generally, when water is supplied to each house from a main water pipe buried under the road, a branch water pipe is buried toward the residential unit almost perpendicular to the main water pipe. When this branch water pipe is to be buried when a new house is being built, a covered road is excavated from the ground surface to the depth of the main water pipe along with a work pit.

[Problem to be solved by the invention]

Therefore, in order to bury a branch water pipe later, the pA road is destroyed and excavated to a predetermined depth each time. Moreover, even if the branch water pipe to be buried is thin, with a diameter of around 25 mm, it is necessary to excavate the width required for burying the branch water pipe, and the amount of excavation increases, and the backfilling of this trench requires excavation. Since the earth and sand cannot be legally used, this excavated earth and sand must be dumped. Furthermore, it is necessary to resurface the road surface after backfilling, making it expensive to bury small-diameter branch water pipes.

The object of the present invention is to bury branch water pipes at low cost without damaging the 11II road beyond necessity.

[Means for solving problem 73] A main work pit is established at the location where the branch water pipe is connected to the main water pipe, and a sub-work pit is located at or near the residence pond located perpendicular to the main water pipe. While excavating to the required depth and size, an excavator equipped with a high-pressure jet nozzle at the tip was used to spray high-pressure water from the main work pit to the sub-work pit through a horizontal hole for burying the C branch water pipe. While excavating, move forward, guide buried pipes are successively added and buried, and it is done between both pits! Penetrate it at a predetermined depth according to Table I, insert the required branch water pipe into this guide buried pipe, and connect its base end to the main water pipe and the other end to the indoor buried pipe side, respectively.

〔Example〕

The present invention will be explained below based on the illustrated embodiments.

When laying a water pipe to a residential unit on land 3 facing the road 2 or a little away from the main water pipe 1 buried at the required depth under the road, first install it at a position above the main water pipe 1,
A main work pit 4 is also excavated at the location where the branch water pipe will be laid. This main work pit 4 is located at P from the covered road surface.
The main water pipes were excavated a little deeper than the water pipe burial position, without damaging the main water pipes during work or mechanical excavation using tools such as excavators. - Excavate to a size that allows work to be done inside.

Further, a sub-work pit 5 is excavated in the same manner as the main work pit, at a site where a branch water pipe is to be laid, or on a road in the vicinity thereof, facing the main work pit 4. A straight line connecting the main and sub-work pits 4.5 is determined to be approximately perpendicular to the main water pipe.

Next, the excavator 6 is installed at a position slightly above the main water pipe position and toward a part of the inner wall of the main work pit. The excavation direction of the excavation hole by this excavator 6 is made to coincide with the straight line connecting the main work pit 4 and the sub-work pit 5. An excavated hole IO in which this branch water pipe 7 is buried is excavated so as to have a slightly larger diameter than this water pipe 7. The excavator 6 is provided with a high-pressure jet nozzle 62 connected to tap water or a high-pressure pump (not shown) through a high-pressure hose 61 in a cylindrical main body 60, and this main body 60 is slidably supported on an outer cylinder 63. At the same time, the outer cylinder 63 is supported by a fixing device 'I164. Therefore, the excavator 6 configured in this way has a fixing device 6
At step 4, fix the branch water pipe to the main water pipe 1 at the location where it will be buried. At this time, the high-pressure jet nozzle 62 is made substantially horizontal and directed toward the sub-work pit 5. Next, when high pressure water is supplied to the high pressure hose 6 1 1 connected to this jet nozzle 62, the high pressure jet water is injected from the nozzle 62, thereby performing excavation. The earth and sand excavated by the high-pressure jet becomes sewage together with high-pressure water and accumulates in the main work pit. This is drained using a bomb 9.

When high-pressure water is injected from the jet nozzle 62 in this manner, the earth and sand facing this nozzle is excavated. Once only a predetermined length has been excavated, the rear end of the main body 60 is
A guide cylinder 65 with the same diameter as 0 is added. Excavation by the forward movement of the jet nozzle is sequentially performed by connecting the guide cylinder 65, and this excavation hole is made to penetrate to the sub-work pit.

When the excavation hole is penetrated between the main and sub-work pits, the main body 60 equipped with the high-pressure jet nozzle and the fixing device 64 are removed, but the guide @ 65 remains buried in the soil. As mentioned in Section 11, the inner diameter of this guide tube 65 is slightly larger than the diameter of the branch water pipe, so a branch water pipe of the required diameter is inserted into this guide tube 65, and its proximal end is It is connected to the main water pipe using the construction method, and the tip inside the sub-work pit is connected to the water meter 8 side.

After the branch water pipe is thus laid through the guide tube previously buried in the upper part, the main work pit 4 is backfilled with earth and sand that complies with the law, and the branch water pipe burying work is completed. It is something to do.

Although the above embodiments have been described with respect to burying branch water pipes, this pipe can also be applied to burying gas pipes and other pipe bodies.

Further, if the high-pressure jet nozzle 62 collides with other buried objects such as rocks or gas pipes in the soil as it moves forward, excavation by the high-pressure jet nozzle will stop. In such a case, excavation shall be carried out from the ground surface between the sub-work pits from that position, and even in such a case, the excavation length from the road IP1 surface should be made as short as possible.

〔Effect of the invention〕

The present invention excavates a main work pit at the location where the branch water pipe is connected to the main water pipe, and a sub-work pit to the required depth and size at the residential unit site or in the vicinity thereof, which is perpendicular to the main water pipe. At the same time, an excavator equipped with a high-pressure jet nozzle at the tip of the horizontal hole for burying the branch water pipes from the main work pit to the sub-work pit is moved forward while injecting high-pressure water to excavate and guide the buried pipes one by one. It is formed by connecting and burying it, and it is penetrated between both pits at a predetermined depth from the ground surface, and the required branch water pipe is inserted into this guide buried pipe, its base end is connected to the main water pipe, and the other end is buried indoors. Since the pipes are connected to each other on the pipe side, even if branch water pipes are buried from a paved road to a necessary residence, etc., only the work pit needs to be excavated from the ground level, so there is no need to excavate more than necessary. Since it does not damage the pavement and does not require excavation from the ground surface at the location where the branch water pipe is buried, the burying work can be done easily, quickly, and inexpensively, and it can also be done without damaging existing nearby buried pipes. There are advantages.

[Brief explanation of the drawing]

FIG. 1 is an embodiment diagram showing a water pipe burying method according to the present invention, and FIG. 2 is an explanatory diagram of an excavator. 1 is the main water pipe, 2 is the road, 3 is the land, 4 is the main work bit 1, 5 is the sub-work pit, 6 is the excavator, 62 is the high pressure jet nozzle, 65 is the guide tube, 7 is the branch water pipe, 8 is a water meter, 9 is a pump, and 10 is a borehole. ? -1 and 1 other person

Claims (1)

[Claims] (1) Excavate a main work pit at the location where the branch water pipe is connected to the main water pipe, and a sub-work pit to the required depth and size at a location on or near the residential unit site perpendicular to the main water pipe. At the same time, an excavator equipped with a high-pressure jet nozzle at the tip of the horizontal hole for burying the branch water pipes from the main work pit to the sub-work pit is moved forward while injecting high-pressure water to excavate and guide the buried pipes one by one. It is formed by connecting and burying it, and it is penetrated between both pits at a predetermined depth from the ground surface, and the required branch water pipe is inserted into this guide buried pipe, its base end is connected to the main water pipe, and the other end is buried indoors. A method for burying water pipes, characterized by the fact that they are joined to each other on the pipe side.