JPS5950811B2 - Drain method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drain construction method, mainly a drain construction method using a strip-shaped drain material such as the Tuffnel drain construction method or the Hehard Lane method.

In general, paper drain construction methods, tuffnel drain construction methods, etc. are used to improve and strengthen soft ground.
These drain construction methods generally involve inserting a band-shaped drain material into a mandrel, inserting it into the ground with the tip of the mandrel chucked, and then pulling out the mandrel with the drain material remaining after reaching a specified depth. be.

However, in this case, a considerably long mandrel is required depending on the insertion depth, and the driving machine becomes quite large when inserting many sheets of paper at the same time, making it extremely difficult to perform on soft ground and inefficient. .

This invention was devised in view of the above circumstances, and proposes a ground improvement method that allows multiple drain materials to be inserted at the same time and improves penetration efficiency.

The present invention will be explained below with reference to illustrated embodiments.

In FIGS. 1 to 3, support arms 2 and 3 are attached to the front part of a base machine 1 that can run freely, and a drain material 4 wound in a coil shape at intervals is attached to the support arm 2. supported.

The support arm 3 is attached to a position corresponding to the suspension reel 5 or the drop lane material 4, and a water supply hose side guide reel 6 is attached, and the base machine 1 is equipped with a high-pressure water supply device 7. A water supply hose 8 is disposed via a guide reel 6, and excavation weights 9 are attached to the tips of the hoses.

The digging weight 9 has a solid tip, and a plurality of injection ports 10 are provided at the tip.

High pressure water supplied from the high pressure water supply device 7 is ejected from the injection port 10 of the excavation weight 9 through the supply hose 8.

Note that the injection angle of the injection port 10 can be changed as appropriate depending on the type of ground or the location of the soft shell.

In the above configuration, when inserting the drain material 4,
Multiple excavation weights 9 are inserted into the ground at the same time, and the injection port 10 is
The excavation hole 11 is drilled by loosening the surrounding ground while injecting high-pressure water from the excavation hole 11.

Here, the ground around the tip of the weight 9 is loosened by the high-pressure water, and becomes extremely soft in addition to the soft ground, so that the weight 9 sinks due to its own weight, and the hole 1
1 is formed.

After reaching a predetermined depth, the weight 9 is lifted up by the suspension rope 12.

Note that the suspension rope 12 is connected to a hoist (not shown) provided on the base machine 1 via a reel 5.

Next, excavation (drain material 4 is inserted into the old 1) is completed.

At that time, a fixing weight 13 is attached to the tip of the drain material 4.

This allows smooth insertion and facilitates fixation to the bottom of the hole 11.

Furthermore, in the embodiments shown in FIGS. 4a, 1) and 4c, a drain material insertion hole 14 is provided in the center of the weight 9', penetrating vertically.

When inserting the drain material 4, use the insertion hole 14 of the weight 9'.
The drain material 4 is inserted through the drain material 4, and the fixing weight 13 is attached to the end of the drain material 4 protruding toward the tip side of the weight 9', and then the drain material 4 is inserted into the ground.

Next, while injecting high-pressure water from the injection port 10' of the weight 9', a plurality of weights 9' are simultaneously excavated to form the excavated hole 11'.
to be drilled.

After reaching a predetermined depth, the drain material 4 is removed from the tip of the weight 9', and the drain material 4 is lifted up by the suspension rope 12', leaving the drain material 4 in place.

At this time, the drain material 4 can be sequentially buried by jetting high-pressure water while lifting the weight 9' to break the inner wall of the excavated hole 11'.

As described above, according to the present invention, the surrounding ground is loosened by the excavating weight that can inject high-pressure water from the tip, and the weight excavates through the ground by its own weight, making it easy to drill an excavation hole. Furthermore, the drain material can be easily inserted into the excavated hole.

Therefore, there is no need to use a mandrel as in the past, and the insertion machine can be downsized, and a large number of drain materials can be inserted at the same time, so that work efficiency can be improved.

[Brief explanation of the drawing]

Figure 1 is a schematic elevation view showing the construction state, Figure 2 is its plan view, Figure 3 is a, l) longitudinal sectional view showing the main parts of the construction state in the order of steps, Figure 4 a, l), c FIG. 3 is a vertical cross-sectional view showing another example in the order of steps. 1... Base machine, 2, 3... Support arm, 4... Drain material, 5...
・Suspension regular reel, 6... Guide reel, 7.
...High pressure water supply device, 8...Water supply hose, 9,9'...Curved excavation weight, 10°10'...
Injection port, 11, 11'...Curved drilling hole, 12...
Suspension cable, 13... Weight, 14... Drain material insertion hole.

Claims (1)

[Scope of Claims] 1. An excavation weight capable of injecting high-pressure water from its tip through a water supply hose is provided, the tip of a drain material is fixed to this excavation weight, and the ground is ground while injecting high-pressure water from the tip of the excavation weight. A drain construction method characterized by drilling an excavation hole, inserting a drain material, and removing the drain material after reaching a predetermined depth and installing it inside the excavation hole, and then lifting an excavation weight. . 2. The drain construction method according to claim 1, characterized in that the excavation weight is provided with a drain material insertion hole that penetrates vertically. 3. The drain construction method according to claim 2, characterized in that the drain material is inserted and locked into the drain material insertion hole of the digging weight. 4. The drain construction method according to claim 1, characterized in that a fixing weight is attached to the tip of the drain material.