JPS5862281A - Underwater boring method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an underwater polling system in which a borer apparatus is supported by a single support pipe, and this support pipe is erected underwater to conduct underground observation and sample collection. This is a major addition to the construction method.

In the past, towers were generally used to support underwater boring equipment by hammering or brazing, due to stability reasons, but in remote locations,
Installation may be difficult depending on the shape of the Fusoko Zuisui (uneven or sloping ground).
There is a problem, so I have to use this for 1i11 hours)
, at) It was practical and an umbrella.

Therefore, in recent years, seven support pipes have been used instead of the tower because they are easy to install and do not receive much of the flow from the ground, which has little to do with the shape of the ground cord. With this single support pipe, drilling and underwater boring can now be easily performed in a wide range of locations, and due to the structure of the seven support pipes, accurate testing and sampling of shallow ground is possible. 1IIiL has occurred during sampling, i.e., boring equipment←
) is a casing pipe 1!1. which is fitted inside the support pipe ll) and acts as a retainer, as shown in FIG. This Kushy pipe 1! l T - Penetration, lifting, rotation a [rod tip dI/'c kIII rod (3
) and a rotating and lifting drive unit for this test rod, etc. The support pipe 111 supports this borer device as an outer cylindrical pipe and is erected on the water bottom ground (a).

Therefore, for underwater poling KD, the support pipe needs to stably support the bow 971 wheel f so that the 1iic anchor rod can accurately excavate, #c map, and fill the specified ground. For this purpose, the support pipe itself must be firmly erected on the ground. Therefore, in the past, as shown in Figure 1/1, a support pipe 41J, which is made by connecting branch pipes to a predetermined length depending on the water depth, etc., was installed at a predetermined underwater location. Insect depth fiiFK driving (1&) is installed,
Further support vibro) below! Installed in advance on the 9 support frame (4
) is placed on the bottom of the water (vibro), which is supported by the vibro)
A plurality of anchor wires bound with -IIIA were extended radially from the upper part of the pipe, and the free ends of the anchors (5 &) were secured to the ground to stabilize the support pipe (1).

Attach the workbench (6) to the upper end of the support pipe (1) erected as described above, and then attach the casing pipe (!
Section 11 narrow rod descending, rotation drive unit, drilling rod 1319
't-Attach. Then, for underwater polling, a trowel tube and a collection tube are alternately screwed to the lower end of the test rod 181 according to the purpose, and the core tube is rotated and lowered by sliding. Testing and sampling of soil material using a sampling tube penetrated into the ground by making a large scratch 9 and driving a test rod into the ground were repeated to collect samples up to a predetermined depth.By the way, this test and wiping In order to obtain accurate results of the soil examination, it is important that the earthen acupuncture be in its natural state without any sagging. However, in the conventional construction method, in order to stably erect the support pipe, the support pipe body is first driven into the surface layer of the underwater area to the depth of the depth of the support pipe, so even the four ends of the support pipe drive are not connected to the subsurface steel below. Although there is no disturbance, #i-phase disturbance has occurred in the surface ground where the support pipe was driven. The natural state of the ground was disrupted, making it impossible to perform accurate tests and sample collection.The present invention improves and eliminates the above-mentioned drawbacks of the prior art. It is an object of the present invention to provide an underwater boring/goue method that allows accurate testing and sample collection without disturbing the surface ground of the driving part, and also allows for more stable installation of support pipes.

The turning diagram of the present invention will be explained below.

First, casing pipe 1! Support pipe with 1 inside +
1) *-Plunge into the water and below it 1st- Underwater ground 0
), and the support pipe (1) is erected by holding the support frame by the ship and holding the anchor wire. As a result, the support pipe is unstable, but I!
Directly supported - In this case, a sampling tube 11) is attached to one set of test drilling rods (see figure M), and the lower part of the support pipe is secured to the support frame. You can also separate it from the ground by tapping the KIilI rod 111 to remove the lower end of the sampling tube (7) from the surface layer of the ground←5
We will conduct tests and sample collection by testing and collecting samples.
(shown in Figure 2 (b) Actual figure) - Hodori, the detective, raised the sampling tube with the test rod to the top of the sample stand 111), took out the collected sample from the stand, and put it together with the test rod into the Mizushi ground hold hole. After descending to the bottom, rotating, raising and lowering, etc., and excavating until the test and sample sampling time has been reached, remove the core tube from the rod, place the sample collection tube on the rod, and attach the rod. At the same time, the next new test and examination will be conducted, and the K grade will be obtained.The support pipe will be driven into the ground where the test and sample collection have been completed to the depth necessary for stable standing. (see Figure 2(C)) - This allows the support pipe ill
The support state is the same as that of the conventional driving support, and it is firmly supported in the reconsideration state. By this method of erecting support pipes, the six layers of the ground are divided into 1g parts and samples are taken, and tests and samples are taken accurately in each part. In addition, sampling of deep layers after driving the support pipe can be carried out by alternately using the core tube and the inner tube as in the past. be exposed.

As can be seen from the above description, the present invention first involves placing a support pipe on a submerged board in ridges or spaced apart, holding it straight with a support frame, anchor wire, etc., and then inserting it into the support pipe. Thread 4 at the tip of the test rod that can be inserted and moved up and down and rotated 1g1! Dotora-t-test and sample collection of the surface layer of the ground, drive and secure a support pipe to the extent of the above-mentioned sample mound failure level, and then conduct a test on the soil material f below the support pipe. Let the point to be sampled be l\l.

Since Honjitsu 8A rolls like this, it is possible to perform accurate testing and sample collection of the ground below the support pipe (by testing and sampling the surface layer of the underwater ground after driving the support pipe). Even if the support pipe is placed on the bottom ground of the Hiroshima water bottom and separated by a support frame, anchor wire, etc., even in the initial test and sample collection MR. It is maintained at KmWL to the extent that it does not interfere with the production, and it is firmly and firmly supported after driving, so testing and sample collection are carried out at 6 ag from beginning to end. Figure 2, Figure 2, is an implied front view of the installation of the polling device used in the invention.
This is a suggestive front view of the support section showing the noodle order according to the noodle order.

11)...Support pipe, 1s)...Drilling rod, (4:
・*Support frame, (Il・-anchor wire, ←)・・
Polling device, 1)...Aquatic ground, ω...Translation layer of the ground.

#11 Figure 2111 (β) CC Noji J-
, -1

Claims (1)

[Claims] (1) Boring fNItt - In the method of supporting with support pipes and erecting the support pipes underwater for poling, the support pipes are first placed or isolated on the underwater ground and then the support frame is constructed. , hold it in one line with an anchor wire, etc., insert it into a support pipe, raise and lower it, and rotate it freely, and collect the tip of the silver test rod to determine the soil quality of the surface layer of the ground.
After sampling, measuring the number of sections and carefully inspecting the sample, remove it to the above-mentioned inspection and tested depth using #jK of the stable type e of the support pipe.
Drive and fix the support pipe as a mechanism. Next is the underwater mailing method, which features t-characteristics of the ground below the support pipe, such as massaging, vL eating, K@, and sampling.