JP2592901B2 - How to put a long pipe into the groove in sheet pile construction - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of inserting a long pipe into a groove in sheet pile construction.

2. Description of the Related Art Conventionally, when embedding pipes such as water pipes and gas pipes in the ground, a so-called bare excavation method is used in a place where the ground is good, a groove is dug on the ground surface, and a pipe line is formed at a groove bottom. After laying, the groove is backfilled with the backfill material. However, when the excavation depth of the groove is large or the ground is soft, a method of performing excavation after performing sheet pile work is often adopted in order to prevent collapse of the side wall of the groove. The details of this method will be described with reference to FIG.
Is applied. The sheet pile 2 is formed by driving a plurality of steel sheet piles 3 in two rows on the ground surface. Next, a trench 1 is excavated on the ground surface, and a support 4 is applied to the sheet pile 2 as the excavation proceeds.
The shoring 4 includes a plurality of prongs 5 and cutting beams 6.
The belly 5 is a member made of H-shaped steel or the like that connects the upper ends of the steel sheet piles 3 in each row, and is provided continuously. Further, the cutting beam 6 is erected between the opposing bulges 5 and the steel sheet pile 3 is provided.
The members are made of H-shaped steel or the like for preventing falling of the steel plates, and are provided at predetermined intervals (hereinafter referred to as "inner spans") s. This inner span s is usually about 4 to 5 m. Next, using a crane truck or the like, a plurality of unit pipes 7 are suspended and connected one by one to the bottom of the groove 1 from between the cutting beams 6 to form a pipeline 8. At this time, it is needless to say that the inner span s is set to be longer than the length l of the conventional unit pipe 7. Finally, the groove 1 is backfilled with the backfill material while removing the sheet pile 2 and the support 4.

Problems to be Solved by the Invention By the way, in recent years, particularly large-diameter unit pipes 7 'having a length l' of 9 to 12 m have been manufactured. The length of the unit pipe (hereinafter referred to as "long pipe")
It has become necessary to suspend the 7 'in the groove 1. However, in this case, according to the above-described conventional method, the size of the H-beam or the like used for the cutting beam 6 is limited, so that the inner span s is set longer than the length l 'of the long pipe 7'. Can't be bigger. For this reason, a method is adopted in which one or two cut beams 6 corresponding to the installation position of the newly installed long tube 7 'are removed and the long tube 7' is suspended. However, according to this method, the steel sheet pile 3 may be tilted or collapsed at the portion by removing the cutting beam 6, and the connecting work and the backfilling work of the long pipe 7 'in the groove 1 may be performed. The problem is that it is very dangerous for those who do it. As a countermeasure, it is conceivable to immediately backfill the connected long pipe 7 'to make the depth of the groove 1 shallow, but in this case, the laying work requires connecting and backfilling the long pipe 7' to one pipe. This is repeated every time, and the arrangement of the backfill material or the like is shredded, the work efficiency is reduced, and the advantage of the long pipe 7 ', which is to speed up the installation work, is impaired.

The present invention is intended to eliminate such disadvantages,
An object of the present invention is to provide a method for inserting a long pipe into a groove in sheet pile construction in which a laying operation can be performed safely and quickly by enabling a long pipe to be laid without removing a support.

Means for Solving the Problems In order to solve the above problems, the present invention digs the ground surface between the sheet piles that are driven into the ground to form both side walls, and support the sheet piles between the side walls with supports. A method in which a long pipe that is longer than the distance between the supports and the supports that are arranged at predetermined intervals along the axial direction of the grooves in the formed groove is provided in a part of the grooves. The elongated tube suspended by the cord is held in the widened portion where the elongated tube is rotatable in the horizontal direction in a direction orthogonal to the axial direction of the groove, and is suspended from between the supports in the widened portion. Then, the long tube is rotated in the horizontal direction in the widening portion to be along the axial direction of the groove, and in this state, the long tube is moved to the laying position in the groove and is put into the groove. It is.

In the configuration of the present invention, when the pipe is laid in the groove, the long pipe is hung down in the widening portion in a direction perpendicular to the axis of the groove, and then rotated in the axial direction to pass under the support. Since the shoring is moved to the laying position in the groove, the shoring may be the same as the conventional one, and it is not necessary to remove the shoring at the time of laying. Therefore, the laying operation can be performed extremely safely and quickly, and the advantage of using the long tube can be sufficiently exhibited.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2 in the order of operation.

First, a groove 11 having a widened part 10 is partially excavated on the ground surface 12, but in order to prevent the side wall of the groove 11 from collapsing during excavation, a sheet pile work 13 was applied before excavation. Excavate the rear groove 11. At this time, the widening section 10 is internally provided with a long tube 19 described later.
Excavation to the extent that can be rotated horizontally.
The length L of the long tube 19 is 9 to 12 m. This sheet pile 13
A plurality of steel sheet piles 14 are formed on the ground surface 12 according to the shape of the groove 11.
This is what you type in the line. Furthermore, a shoring 15 is applied to the upper end of the sheet pile 13 in accordance with the progress of the excavation to prevent the sheet pile 13 from falling down. The shoring 15 includes a plurality of bulges 16, cutting beams 17 and diagonal reinforcing members 18. The belly 16 is a member made of H-shaped steel or the like that connects the upper ends of the steel sheet piles 14 in each row.
Provide continuously. In addition, the cutting beams 17 are opposed
A member made of H-shaped steel or the like, which is installed between the steel sheet piles 14 to prevent the steel sheet pile 14 from falling down, and is provided with an inner span s therebetween. The inner span s may be 4 to 5 m, which is almost the same as that of a conventional cutting beam.
Further, the inner span s' of the cutting beam 17 in the widened portion 10 only needs to be slightly larger than the diameter of a long tube 19 described later. Next, a plurality of long pipes 19 are
After being individually suspended in the widened portion 10 from between the cut beams 17 of the widened portion 10, it is rotated while passing under the cut beam 17 in the direction of the axis XX. Next, the long pipes 19 are moved to a laying position in the groove 11 while passing under the cutting beam 17 while being suspended, and connected to each other to form a pipe line 20. At the time of movement, a wire rope or the like that suspends the long pipe 19 at the cutting beam 17 is replaced each time.
The connection of the long pipe 19 in the widening section 10 is performed last, and the adjustment pipe is connected to the adjustment pipe by a connecting wheel or the like (not shown). Finally, the groove 11 is backfilled with the backfill material while removing the sheet pile 13 and the support 15. Reference numeral 21 denotes high-quality soil or sand for preventing the pipeline 20 from sinking.

Thus, the pipe 20 is buried underground.When the pipe 20 is laid in the groove 11, the long pipe 19 is hung from between the cutting beams 17, and its direction is changed and the pipe is moved to the laying position. Since the movement is performed while passing under the cutting beam 17, the inner span s, s' of the cutting beam 17 may be about 4 to 5 m as in the past, and the cutting beam 17 does not need to be removed. Therefore, the diameter is 4-5m
The work for laying the long pipe 19 can be performed safely and quickly. Also, if it is assumed that the long pipe 19 is suspended from the widening section 10 by 100 m for each of the upstream and downstream of the pipeline 20, the widening section
For 10, it is sufficient to excavate every 200 m of the pipeline 20.
Normally, a deformed pipe such as a curved pipe is used in some places in the pipeline 20, but in such a case, the entire deformed pipe is often wrapped in concrete or the like and a thrust block is cast therein, and the location is widely excavated. Therefore, it is reasonable to suspend the long tube 19 by using this as the widening portion 10. Furthermore, when moving the long tube 19 from the widened portion 10 to the laying position in the groove 11, when laying a rail at the bottom of the groove and installing a carriage thereon, the long tube 19 is placed on the trolley and moved. The installation work can be performed efficiently.

Effects of the Invention As described above, according to the present invention, when laying a pipe in a groove, a long pipe is hung from between the supports of the widened portion, and its direction change and movement to the laying position are supported. Since it is carried out while passing under, the support work may be the same as the conventional one, and it is not necessary to remove the support work. Therefore, even a work of laying a pipeline using a long pipe can be performed extremely safely and quickly, and the advantage of using a long pipe can be sufficiently exhibited. In addition, when a deformed pipe is used for the pipeline, the location can also be used as a widening section, and if a carriage for moving the long pipe on the bottom of the groove is provided, the work of laying the pipeline can be made more rational. It can be efficient.

[Brief description of the drawings]

1 is a plan view of a working state showing an embodiment of the method of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a plan view of a working state showing an example of a conventional method. FIG. 10 ... widening section, 11 ... groove, 12 ... ground surface, 13 ... sheet pile, 14 ... steel sheet pile, 15 ... support, 19 ... long pipe, 20 ...
… Pipe, XX… groove axis.

Claims (1)

(57) [Claims] An excavation machine is installed in the ground to excavate the ground surface between sheet piles forming both side walls, and a predetermined space is formed along the axial direction of the groove in a groove formed by supporting the sheet piles on both side walls with a support. A method of feeding long pipes longer than the distance between the shoring works and the shoring works arranged at intervals, and is provided in a part of the groove and in a widening portion capable of rotating the long pipe in a horizontal direction. At the same time, the long tube suspended by the rope is held in the direction orthogonal to the axial direction of the groove, suspended from between the supports in the widened portion, and the long tube is rotated horizontally in the widened portion. A long pipe is moved to a laying position in the groove and inserted into the groove in this state, and the long pipe is inserted into the groove in sheet pile construction.