JP2657937B2 - Burial method of small diameter pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for embedding small-diameter pipes, and more particularly, to burying small-diameter pipes such as sewage pipes in the soil where water pipes and gas pipes are buried. The present invention relates to a method for burying a small-diameter pipe which is suitable when a buried obstacle such as a gutter exists.

[0002]

2. Description of the Related Art Construction methods for embedding various small-diameter pipes such as sewage pipes are roughly classified into an open-cutting method and other special methods.

[0003] Among these, the excavation method is a method of digging from the road surface side by using mechanical force. However, if there is a buried obstacle such as a telephone line pipe, a water pipe, a gas pipe, a waterway, etc., it will not be damaged. In addition to the inconvenience of having to rely on human power, there is also a disadvantage that traffic must be cut off for construction work in places where vehicle traffic is frequent such as intersections.

On the other hand, special construction methods other than the above-mentioned open-cutting method include:
There are propulsion method, shield method, mountain tunnel method, etc.
There are a semi-shield method and a small-diameter propulsion method.

[0005] In the above-mentioned propulsion method, a blade-port type propulsion method has a blade at the tip of a propulsion pipe, and excavates the ground by human power. Excavated soil is transported in the pipe by a bucket or a conveyer. It is carried out of the mine using a crane or the like.
In this method, a propulsion pipe is propelled by using a propulsion press-fitting device including a spacer, a press wheel, and a support wall.

[0006]

By the way, the inconvenience seen in the digging method can also be solved by the above-mentioned blade type propulsion method.

However, when a fume pipe having a diameter of about 800 mm is used as a propulsion pipe, friction at the time of propulsion press-fitting is large, so that the size of the propulsion press-fitting apparatus increases, and the cost increases. Accordingly, the starting shaft also has to have a large opening surface with a diameter of about 6 m, and there is a problem that the factor that hinders general traffic is increased accordingly.

[0008] Further, since a cutting edge is attached to the tip of the propulsion tube, it is necessary to always provide a reaching shaft to collect the blade, and there is also a disadvantage that the operation becomes complicated.

Furthermore, even when a metal pipe is used as the propulsion pipe, excavation of the soil in the propulsion pipe is inferior in workability due to its narrow diameter of about 800 mm, and the propulsion pipe itself is curved. As a result, the installation position of the small-diameter pipe is also regulated by the propulsion pipe, which makes it difficult to lay the small-diameter pipe at the correct position unless the propulsion pipe itself is accurately press-fitted. there were.

[0010]

The present invention provides a conventional method,
In particular, the present invention has been made in view of the above-mentioned problems found in the blade-type propulsion method, and its structural features are 1000 to 120.
It has a seat height of about 0 mm, has an arch shape with a wall thickness of about 8 to 12 mm , and has a guide flank at the lower edge.
The starting shaft required to press-fit the metal casing provided with the flange into the soil of a predetermined depth is provided, and the starting shaft is provided with a propulsion position regulating table that guides in the propulsion direction.
The guide flange is placed on the propulsion position restricting table, and the position of the propulsion direction can be restricted during press-fitting by the hydraulic jack, and the first metal casing is arranged. Using the hydraulic jack, The soil in the metal casing is excavated and removed by press-fitting, and then the first metal casing is propelled and pressed into a bead-like shape by the second metal casing disposed therein, and the soil in the first metal casing is again pressed. Excavation is eliminated, and thereafter, the same press-fitting excavation work is repeatedly performed until the first metal casing reaches the manhole side located in the propulsion direction, thereby forming a space portion having a series of metal casings as protection walls. The small-diameter pipes are connected to each other under the inclination angle defined by the nozzle fixed to the bottom of this space, and laid on the nozzle, and located at the forefront of the nozzle After connecting the front end of the diameter pipe the manhole is to be filled with fine-grained crushed stone inside the space portion burying the small-diameter pipe.

[0011]

The metal casing has a relatively small thickness of about 8 to 12 mm, so that the friction at the time of press-fitting into the soil can be reduced. Even if a relatively small and inexpensive hydraulic jack is used, it can be easily propelled and pressed into the soil.

Further, the press-fitting of the metal casing using such a hydraulic jack can be made relatively compact in terms of equipment, and therefore, the opening surface of the starting shaft can be made smaller. .

[0013] Further, excavation of the soil in the metal casing,
Since the work can be performed while securing a space having a height of about 1000 to 1200 mm, workability can be improved, and work can be performed safely by using an arched metal casing with high pressure resistance as a protective wall. Can be accomplished.

Further, since the small diameter pipe can be laid with reference to the bottom surface having a sufficient width secured by the metal casing, the accuracy can be adjusted with a sufficient margin.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an explanatory view showing an example of a state in which a first metal casing reaches a manhole according to the present invention. The first metal casing is required to press-fit the metal casing 11 into a soil 41 having a predetermined depth. Jack 31 stably installed on the bottom surface 27 of the starting shaft 25 formed by securing a sufficient space via the supporting wall material 34 and the jack base 35.
And a plurality of metal casings 11 which are placed on the propulsion position regulating table 17 which is accurately positioned and fixed on the bottom surface 27, and which are sequentially press-fitted by the hydraulic jack 31 until they reach the manhole 43 side. This is performed by using

Reference numeral 33 in the figure denotes oil feed pipes 32 and 3.
2 is a hydraulic control unit disposed on the road surface 40 for controlling the operation of the hydraulic jack 31 through
Reference numeral 2 denotes a buried obstacle such as a water pipe, a gas pipe, or a gutter already buried in the soil 41.

FIG. 2 is a detailed view showing an example of the metal casing 11 and the propulsion position regulating table 17 shown in FIG.

According to FIG. 1, the metal casing 11 comprises a pressure-resistant top wall portion 12 formed in a curved shape, vertical supporting wall portions 13 and 13 for supporting the top portion, and these vertical supporting wall portions 13 and 1.
3 and a guide flange portion 14 extending in the horizontal direction that intersects the lower edge of the guide flange 3 and has an arch shape with high pressure resistance as a whole.

Regarding the standard size of the metal casing 11 having such a configuration, in addition to the relationship with the diameter of the small-diameter pipe 36 buried as shown in FIG.
Any suitable one suitable for ensuring the workability of the worker 44 and the pressure resistance can be adopted.

If this is specifically shown, the sitting height is 1
000-1200 mm, preferably about 1100 mm, width about 700-900 mm, depth 1500
mm can be suitably used.

The metal casing 11 having the above-mentioned standard size is used to reduce friction at the time of propulsion press-fitting into the soil 41 and to obtain necessary and sufficient pressure resistance.
It is desirable to use an iron plate having a thickness of about 12 mm, preferably about 9 mm.

Further, the guide flange portion 14 extending in the horizontal direction intersecting the lower end edge of the vertical support wall portion 13 in the metal casing 11 has a portion located inside as shown in the example of the drawing, and the outside. In addition to being formed longer than the located portion, the outer portion may be formed to be longer than the inner portion as necessary, or may be formed so as to protrude only in one side direction.

On the other hand, the propulsion position regulating table 17 is
The horizontal mounting pieces 19 are formed in a substantially T-shape between the pair of standing support pieces 18, which are erected above, and the lengthwise direction of the horizontal mounting pieces 19 is formed on each horizontal mounting piece 19. A pair of position restricting pieces 20, 20 are erected along the horizontal mounting piece 1 partitioned by the position restricting pieces 20, 20.
A mounting surface 21 for the guide flange 14 in the metal casing 11 is formed on the metal casing 9. In addition, it is preferable that the propulsion position restricting base 17 having such a configuration is formed by using a metal material such as an iron plate material having the same thickness as the metal casing 11.

After the starting point for embedding the small-diameter pipe 36 into the manhole 43 is determined, first, the starting shaft 25 necessary for press-fitting the metal casing 11 into the soil 41 having a predetermined depth is formed. Provided.

After the starting shaft 25 is provided, the hydraulic jack 31 and the propulsion position regulating table 17 are respectively installed at predetermined positions, and the mounting surface 21 of the fixed propulsion position regulating table 17 is set.
The first metal casing 11 is disposed such that the position in the propulsion direction can be regulated at the time of press-fitting by placing the guide flange portion 14 on the first metal casing 11. In addition, the hydraulic jack 31
It is desirable to use, for example, two units to press the vertical support walls 13, 13 in the metal casing 11 in a right-left balance.

After the positional relationship between the hydraulic jack 31, the propulsion position restricting base 17, and the metal casing 11 is determined in this manner, first, the hydraulic jack 31 controlled by the hydraulic control unit 33 controls the first metal. The casing 11 moves along the mounting surface 21 of the propulsion position restricting table 17 along with the soil 41.
Pressed into.

Press-fit the first metal casing 11,
After excavating and removing the soil 41 in the metal casing 11, the second metal casing 11 is set on the propulsion position regulating table 17 in the same manner as in the first case, and the end faces of the first metal casing 11 are mutually opposed. Is pressed against the second metal casing 11 with the hydraulic jack 31,
The first metal casing 11 is accurately positioned and fed into a bead shape, and is again placed in the first metal casing 11.
The soil 41 inside is excavated and eliminated.

FIG. 3 is an explanatory view exemplifying the outline of the excavation work performed at this time. For example, a traveling gate crane 46 is arranged on the opening surface 26 of the starting shaft 25, and a new metal casing 11 is sequentially added. The worker 44 enters the space 16 secured by press-fitting in the shape of a ball, and the earth removal 48 obtained by excavating the soil 41 in the first metal casing 11 is put into the overturning bucket 45, and the traveling gate crane It is carried out by carrying out to a dump truck 47 using 46 or the like.

The space 16 is extended by excavating and removing the soil 41 in the portion where the first metal casing 11 is located, and the same operation is performed when the first metal casing 11 reaches the manhole 43. The space portion 16 from the starting shaft 25 to the manhole 43 is formed by repeating the process until the starting position.

The cut-out portion 1 as shown in FIG. 2 is provided on the tip end side of the pressure-resistant top wall portion 12 of the first metal casing 11.
In the case where 5 is provided in advance, as shown in FIG.

Thus, a series of metal casings 11, 1
After the space 16 having the protection walls 1,... Is formed, the hydraulic jack 31, the propulsion position control table 17, and the like are carried out from the inside of the starting shaft 25, and thereafter, a single fume pipe or the like is formed. A pair of nozzles 37 formed of an appropriate material such as wood for the small-diameter pipe 36 are used for the metal casing 11.
Is located on the bottom surface 27 side.

In this case, the small-diameter pipe 36 is provided with a predetermined inclination angle on the nozzle 37, and is stably mounted via a supporting member 38 attached thereto. The small-diameter tubes 36 are connected to each other until they reach the manhole 43.

Thus, the small-diameter pipe 36 positioned at the forefront is
After the front end of the crushed stone is connected to the manhole 43 and the installation work is completed, for example, fine crushed stone 39 which is pressure-fed through a pipe (not shown) is ejected into the space 16. As shown in FIG. 4, the filling operation of the small-diameter pipe 36 is completed by sequentially filling the small-diameter pipe 36 using the granular crushed stone 39 as shown in FIG.

The fine crushed stone 3 used in this case
As for No. 9, it is preferable to use one having a particle size of about 5.0 to 2.5 mm from the viewpoint of performing the filling operation smoothly and reliably.

Since the present invention is constructed as described above, the metal casing 11 formed to have a relatively small thickness of about 8 to 12 mm reduces friction when the metal casing 11 is pressed into the soil 41. Therefore, even if a relatively small and inexpensive hydraulic jack 31 is used, the press-fitting can be easily performed.

Therefore, the hydraulic jack 31 can be replaced with an appropriate simple device without using a dedicated machine, for example, by using a hydraulic system of a forklift.

Further, since the press-fitting of the metal casing 11 using such a hydraulic jack 31 can be made relatively compact in terms of equipment, the opening surface 26 of the starting shaft 25 is also made smaller. Thus, the work area occupied on the road surface 40 can be narrowed, and the factors causing traffic congestion can be reduced, so that the work of embedding the small-diameter pipe 36 can be performed.

Further, the metal casing 1 press-fitted and pressed.
Since the excavation of the soil 41 in 1 can be performed in the space 16 secured with a height of about 1000 to 1200 mm, the work of the worker 44 can be performed smoothly with less fatigue. In addition, an arched metal casing 11 composed of a pressure-resistant top wall portion 12 and a vertical support wall portion 13 during operation.
The work can be carried out safely using as a protective wall.

Since the small-diameter pipe 36 can be laid with reference to the bottom surface 27 having a sufficient width secured by the metal casing 11, a sufficient space is ensured until the manhole 43 is reached. Work can be performed while adjusting the laying position with precision.

The small-diameter pipe 36 in the present invention is not limited to a sewer pipe, but may be another buried pipe such as a gas pipe or a water pipe if necessary.

[0042]

As described above, according to the present invention, it is possible to secure a space required for embedding a small-diameter pipe by using a metal casing capable of reducing friction during press-fitting. In addition to using a starting shaft with a relatively small opening surface, necessary equipment such as hydraulic jacks can be installed, and the construction period can be shortened compared to open-cutting methods and other propulsion methods. As a result, traffic impeding factors on the road surface can be eliminated as much as possible to help secure public interest.

Further, the metal casing is press-fitted by propulsion.
Since the propulsion direction is controlled while the position of the propulsion direction is controlled through the position control table, the small-diameter pipe to be buried can accurately reach the manhole to be connected.

In addition, the excavation of the soil in the metal casing
Since the work can be performed in a space secured with a height of about 1000 to 1200 mm, the work efficiency can be improved by reducing the fatigue of the worker. The work can be carried out safely using the metal casing as a protective wall.

Further, the small-diameter pipe is adjusted on the basis of the bottom surface having a sufficient width by the metal casing to adjust the position accuracy by using a sufficient position adjustment space secured to the manhole. Since it can be laid accurately, it is possible to achieve higher working accuracy.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of a propulsion press-fit state of a metal casing in the present invention.

FIG. 2 is an overall perspective view showing an example of the interrelationship between a metal casing and a propulsion position restricting base according to the present invention.

FIG. 3 is an explanatory diagram showing an example of an excavation work state according to the present invention.

FIG. 4 is a longitudinal sectional view showing an example of an embedded state of a small-diameter pipe according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Metal casing 12 Pressure-resistant top wall part 13 Vertical supporting wall part 14 Guide flange part 15 Cutting part 16 Space part 17 Propulsion position regulation stand 18 Standing support piece 19 Horizontal placement piece 20 Position regulation standing piece 21 Placement surface 25 Starting shaft 26 Opening surface 27 Bottom surface 31 Hydraulic jack 32 Oil feed pipe 33 Hydraulic control unit 34 Support wall material 35 Jaki stand 36 Small diameter pipe 37 Pipe stand 38 Support member 39 Fine crushed stone 40 Road surface 41 Soil 42 Buried obstacle 43 Manhole 44 worker

Claims (1)

(57) [Claims] 1. A have 1000~1200mm around sitting height, coloration thickness thereof is an arcuate is around 8~12mm
And, and, a starting pit required to promote press-fitting the metal casing comprising a guide flange on the lower edge in the soil of a predetermined depth is provided, this starting pit to the propulsion direction
The propulsion position control table that guides the
The first metal casing is disposed with the guide flange placed thereon to enable position control in the propulsion direction at the time of press-fitting by the hydraulic jack, and the first metal casing is arranged, and press-fitted using the hydraulic jack to remove soil in the metal casing. Excavation is eliminated, and then the first metal casing is propelled and press-fitted in a beading shape by the second metal casing to be arranged, and the soil in the first metal casing is excavated and eliminated again. The work was repeatedly performed until the first metal casing reached the manhole side located in the propulsion direction, thereby forming a space portion having a series of metal casings as protective walls and being fixed on the bottom surface of this space portion. Under the inclination angle defined by the nozzle, the small-diameter pipes are connected to each other and laid on the nozzle, and the front end of the small-diameter pipe located at the foremost end thereof is After connected to Nhoru, buried method of small-diameter pipe, characterized in that to fill the fine granular crushed stone inside the space portion burying the small-diameter pipe.