JPH11350522A - Excavation method of pipe embedding trench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and safely convey excavated soil to a conveying device from an excavation device. SOLUTION: A back-hoe 6 as an excavtion device for a trench 5 and a truck 7 as a conveying device of excavated soil are arranged in a row along the direction of excavation of the trench 5, the trench 5 is excavated with the back-hoe 7, and excavated soil from the back-hoe 7 is conveyed to another place through the truck 7. In that case, the back-hoe 7 or the truck 7 is mounted on the earth retaining trench 5 excavated in advance, and excavation work is carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for excavating a trench for burying a pipe, and more particularly to a method for digging a trench for burying a pipe, which can easily and safely carry out excavated soil from a digging means to a transportation means. .

[0002]

2. Description of the Related Art For example, gas pipes (hereinafter simply referred to as pipes)
One of the methods of burying underground is open cut method. This excavation method involves excavating a groove while retaining a ground, suspending a pipe in the excavated groove, joining the pipe in the groove, and refilling the pipe.

That is, first, various construction equipment is transported to a site where pipes are buried by a truck equipped with a boom type crane, and the equipment is lowered to the site by a crane. Next, after preparing the work zone, the ground is excavated with a backhoe or the like. The excavated ditch is to be earth-retained so that it does not collapse, and be prepared to suspend the pipe. Next, the pipes to be buried are transported to the site by truck and suspended in the ditch by a large crane or the like. Next, in the groove, the pipes are joined to each other by welding, and after welding, a weld is inspected. Then, the earth and sand for backfilling is put into the trench by a dump truck, and the trench is backfilled. Next, after the backfilled soil is leveled, it is compacted by a compactor, and the excavated road surface is paved.

A method of excavating a trench for burying a pipe, which is one of the steps in the above-mentioned open-cutting method, will be further described. FIG.
As shown in the figure, the ground is excavated by the backhoe 2 so as to have the designed groove width, and the earth and sand generated by the excavation is carried out from the inside of the groove 1 to the truck 3 by the backhoe 2.
The trench after excavation is provided with earth retaining 4 made of sheet pile and belly to prevent collapse. In general, pipes are often buried under roads, so that the working belt is elongated, and the width of the working belt can be as small as about one lane in consideration of the influence on traffic. In addition, neither the backhoe 2 nor the truck 3 can enter a groove that has not been earthed during or immediately after excavation. Therefore, both the backhoe 2 and the truck 3 need to be arranged in a line on the unexcavated ground in this order from the upstream in the excavation direction.

[0005]

However, the above-mentioned method for excavating the trench for burying pipes has the following problems. The backhoe 2 must be turned 180 ° in order to transport the excavated earth and sand to the truck 3. Therefore, it took time to turn. The boom, arm, and bucket need to be fine-tuned because they need to be swiveled out of the narrow work zone. Therefore, the turning operation was troublesome. Due to the structure, it is necessary to move the bucket close to the operation room in order to make a turn in a narrow range. Therefore, if the operation is erroneously performed, there is a risk that the bucket collides with the work room.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method for excavating a trench for burying a pipe, in which excavated soil can be easily and safely carried out from an excavating means to a transportation means.

[0007]

According to the first aspect of the present invention,
Excavating means of the groove and the means of transporting excavated soil are arranged in a line along the direction of excavating the groove, and excavating the groove by the excavating means,
A method of excavating a trench for burying pipes, comprising transporting excavated soil generated by excavation to another place by the transporting means, wherein the excavating means or the transporting means is mounted on a groove which has already been excavated and has been earthed. It is characterized in that it is excavated by putting it on the ground.

[0008] The invention according to claim 2 is characterized in that the earth retaining means comprises placing a bag body in a groove and injecting a fluid into the bag body to inflate the bag body. is there.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a method for excavating a trench for burying a pipe according to the present invention will be described with reference to the drawings.

FIG. 1 is a partial schematic sectional view showing an embodiment of a method for excavating a trench for burying a pipe according to the present invention. In FIG. 1, reference numeral 6 denotes a backhoe as an excavating means for excavating the groove 5, which rides on a bag 8 described later. 7
Is a truck as a transportation means for receiving the soil excavated by the backhoe 6 and transporting the soil to another place, and is disposed on the downstream side of the backhoe 6 in the groove excavation direction. 8
Is a bag as an earth retaining member for preventing collapse of the groove 5, and is inflated by press-fitting a fluid such as air or water. Reference numeral 9 denotes an earth retaining structure constructed with a sheet pile and a belly raised in the groove 5 on the upstream side of the bag body 8 in the groove excavation direction.

According to the present invention, a pipe burying groove is excavated as follows. First, excavation of the groove 5 by the backhoe 6 is started. The truck 7 is arranged downstream of the backhoe 6 in the trench excavation direction. When the groove 5 is excavated to a predetermined length, the bag body 8 is put into the groove 5, and a fluid such as air or water is pressed into the bag body 8 to inflate the soil, thereby retaining the soil. After earth retaining, if necessary, lay an iron plate on the groove 5,
Fall accidents can be prevented. Thereafter, the backhoe 6 is attached to the bag 8
And the excavation of the groove 5 is advanced. Hereinafter, this operation is repeated. Existing bags on the upstream side may be sequentially collected, and earth retaining 9 may be performed by sheet piles and abdomen.

According to the present invention, the backhoe 6 as the excavating means is placed on the already excavated groove 1, and the truck 7 as the means for transporting excavated soil is arranged downstream of the backhoe 6 in the direction of excavating the groove. When the excavated soil excavated by 6 is carried out to the truck 7, the backhoe 6 does not need to be turned 180 ° as in the related art, and can be carried out to the truck 7 as it is. Therefore, it is possible to carry out the excavated soil easily and safely even in a narrow work zone.

The earth retaining on which the backhoe 6 rides may be performed by a normal earth retaining 9 made of a sheet pile and a belly other than the bag body 8. Further, as described above, other than arranging the backhoe 6 on the grooved groove 5, a similar effect can be obtained by placing the truck 7 on the grooved groove 5.

When the bag 8 is used as a soil retaining,
The following excavation methods can be adopted. As described above, when the excavation work is performed by the backhoe 6 on the bag body 8 and the excavation for merely inserting a new bag body is completed,
The fluid is withdrawn from the last bag, and the bag is collected and placed in the most advanced groove 5 to be used for earth retaining. In this way, if the bags 8 are used in circulation, the number of bags to be used can be reduced.

When the bag 6 is used for soil retaining, it is convenient and most preferable to inject air. However, when the groundwater level is high and spring water flows out in the groove 5, large buoyancy is applied to the bag 6. There is a possibility that the bag body 6 is pushed out of the groove 5 by acting. In this case, it is preferable to use water as the fluid to be pressed into the bag body 6.

When water is pressed into the bag 6, the following excavation method can be employed. As described above, the excavation work is performed by the backhoe 6 on the bag body 8, and when the excavation for merely inserting a new bag body is completed, the empty bag body is put into the frontmost groove 5 and a new bag is inserted. The water in the existing bag body 6 is replaced in the body. By thus circulating and using water, effective use of water can be achieved.

[0017]

As described above, according to the present invention, the digging operation is carried out by placing the digging means or the transporting means on the already excavated and earth retaining groove.
There is provided a useful effect that the excavated soil can be easily and safely carried out from the excavation means to the transportation means.

[Brief description of the drawings]

FIG. 1 is a partial schematic cross-sectional view showing one embodiment of a method for excavating a trench for burying a pipe according to the present invention.

FIG. 2 is a partial schematic cross-sectional view showing a conventional method for excavating a pipe burying groove.

[Explanation of symbols]

 1: groove 2: backhoe 3: truck 4: earth retaining 5: groove 6: backhoe 7: truck 8: bag

Claims (2)

[Claims] 1. A method for excavating a ditch and a means for transporting excavated soil,
A method for digging a trench for burying pipes, comprising arranging in a row along the direction of digging of the trench, digging the trench by the digging means, and transporting excavated soil generated by digging to another place by the transporting means. A method for digging a trench for burying pipes, wherein the digging means or the transporting means is mounted on a groove which has already been digged and which has been earthed, and digging is performed. 2. The excavation method according to claim 1, wherein said earth retaining means comprises placing a bag body in a groove, and injecting a fluid into said bag body to inflate said bag body. .