JPS60148917A - Blade spreading device for agitating blades for ground improving device - Google Patents

Abstract

PURPOSE:To facilitate a work, by a method wherein agitating blades, unfolded and folded along with mechanical relative movement between an inner pipe and an outer pipe, are attached to the interior of the window part of an excavating head mounted to the forward end of the outer pipe through the medium of a link. CONSTITUTION:When an excavating head 5, being in a condition to fold blades, and a rod part R are rotated and excavated down to a given depth, and a stopper 12, mounted to the upper part of a boring machine 10, a swivel 13 are attached to the upper and part of an inner pipe 1. When an outer pipe 2 of the rod part R is lifted up by means of a drill head 11 as it is rotated, the inner pipe 1 is stopped with the aid of the stopper 12 through the medium of the swivel 13, and as the outer pipe 2 is lifted up, the inner pipe 1 is relatively depressed to unfold agitating blades 4. After the necessary number of rods is connected, excavation and agitation are conducted by the use of the agitating blades 4 as an improving agent is injected to the vicinity of the agitating blades 4 through the discharge port of the excavating head 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a ground improvement machine that mechanically mixes and stirs using the stirring IX. This invention relates to a device for expanding the stirring blades in a soil improvement machine, which performs mixing by opening the stirring blades within a range that requires the following.

In general ground improvement work, depending on the purpose, the upper layer is often left in a state close to its current state, and only the lower layer is improved.

In order to avoid obstacles that are common in the upper layer, to facilitate excavation and opening of areas that do not require improvement, and because we do not want to disturb areas that do not require improvement, we conducted this area in a closed ν4 state. It is desirable to close the blades and mix only the portion to be improved. In particular, if you are trying to improve the soil in the 'F' section by leaving the railroad ties and ballast under the track bed as they are, it will be necessary to widen them using the layer mixing method.

I opened the book, and in view of the above-mentioned circumstances, I found out that the open and closed state of the stirrer, which is underground and cannot be seen with the naked eye, is 21! By checking the position of target A, the inner pipe and outer part of the pipe rod can be confirmed.Since the applied force can be adjusted, the beam can be made without adding extra force, and the 4+7. Compared to the conventional device, it has a much simpler mechanism and fewer malfunctions.This is a device for expanding the agitation difference in the U-improved machine.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1181 to 3 are schematic mechanical diagrams showing the expansion device of the stirring blade according to the present invention, and respectively show a front view, a side view, and a front view in the closed blade state.

In the figure, 1 is an inner pipe, 2 is an outer pipe, 3 is a link, 4 is a stirring blade, and 5 is a drilling head installed at the tip of the outer pipe 2. The link 3 is connected to the inner pipe j and the stirring blade 4. They are connected by a rotatable bottle 6.7, and the stirring blade 4 is connected to the link 3 and the outer tube 2 by a rotatable pin 8.

In addition, in the figure, the soil improvement machine consists of a head part ■110nd R and a moving range of the inner pipe 1, and a closed wing 4 large jz%
The outer pipe 27 consists of a double pipe lot as shown in Figure 1.
This is done with the inner tube 1 pressed down, and the opening state is as shown in Figure 3, the outer tube 2? This is done by applying an external force to the inner tube 1 to bring it into a lifted state.

According to Awn et al., Figure 4 is a section taken along line A-A in Figure 2 [Figure 111, Figure 5].
The figure is a sectional view of Figure 3 Jn-BffM, and the excavation is also done at RAD 5.
A stirring blade 4 is housed in a window 5a formed in the window 5a.
Stirring 1 via link 3 when inner tube l is pushed down
! 44 are expanded outward from the window portion 5a.

In addition, the window portion 5a is opened to a minimum so that the loss of the axial cross section due to the axial torque is reduced, and the link 3
By reducing the thickness of the wing, the compaction of soil and the encroachment of gravel that occur when the wing is closed are pushed out to the opposite side of the southward direction of the wing, making it easier to close the wing.

Further, a flow passage hole 9 for a soil improvement machine such as cement milk is provided at a position of the excavation head 5 excluding the window 5a, as shown in FIG. 4, and a discharge port (
(not shown) is an arbitrary position 6- in the vicinity where the stirring blade 4 has opened.
It is not set up.

The flow passage holes 9 are installed in two systems so that two systems of soil improvement Re can be separately injected into each system.

Note that the attachment state of the agitation blade 4 on the excavation head 5 may be such that the attachment positions of the link 3 and the agitation blade 4 are reversed, as shown in FIG.

Next, the blade expansion operation of the stirring blade configured as described above will be explained.

Figure 7 +a) to ff+ are 1 and '+' are operation explanations when applying an external force to the inner tube 1 using the boring machine 10.
L Fig. 7 1al shows a state in which the rod portion R having the drilling head 5 is installed on the drill head 11 of the boring machine 10, and from this state, the wing spreading device t is 'lr-Drilling head 5 and rod part R in a closed blade state? As the rotary excavation is inserted, when the predetermined excavation depth is reached as shown in Fig. 7 (cl), the stopper 12 installed at the top of the boring machine] As shown in Figure 7 (opening operation g+ state of dl), the blade is stirred for only 4 times.

That is, in the opening/reducing state shown in FIG. 7(d), when the outer tube 2 of the rod portion R is pulled up while being rotated by the drill head 11, the inner tube 1 is stopped by the stopper 12 via the swivel 13, and the outer tube 1 is stopped by the stopper 12 via the swivel 13. As the tube 2 continues to be pulled up, the inner tube 1 is pushed forward (the i14 wing 4 opens).

No. 7181 (When Buddhist utensils are completed in dl, Ik worship order 4
Due to the resistance of the soil, M is 10.1 [meru]: The first part of the connecting rod 14 and the ninth part 15 of the sea urchin have a structure that suppresses its rise as shown in Figure 7 1 (el). .

Therefore, it is necessary to make lot d 1EiJ and then use yen l when excavating or hauling, or as necessary.
: Put the ground improvement camphor from the outer pipe 2 and stir the excavation with the Kuma stirring reduction 4 without letting one shell come out from the discharge port of the whole excavation head 5 in the vicinity of 4 in 1 stirring. What?

As described above, when the mixing process for a predetermined depth range is completed, the IIL primary rondo capital l() can be drawn up to the 71st separate (fl closing position 1 peak), and, contrary to Fig. 7 fdl, the inner 1) Set the IM on the stopper 12 and push the outer 12 downwards.Then, the inner tube 1 will be relatively lifted up and the stirring blades 4 will be closed. In this situation, the necessary deep mixing process will not be carried out before the general meeting begins.

Figure 8 shows the connection part 1 of the rod part H shown in Figure 7 (el).
5, the inner tube 1 has a convex male threaded portion 16 fixed to the upper end of the outer tube 2 inserted through it, and a fixing nut 17 is attached to the upper end.
A male threaded portion 1a is provided for ms. When the fixing nut 17 is screwed onto the male threaded portion 1a at the upper end of the inner tube l, and the concave female threaded portion 18'ft at the lower end of the connecting rod 14 is connected to the convex male threaded portion 16 of the outer tube 2, the concave recess ff1l 18 of the connecting rod 14 is established. a prevents the fixing nut 17 from rising.

At this time, the lower inner pipe 1 and the inner pipe r of the connecting rod 14 communicate with each other via the connecting portion 1affi, and are sealed by the O-link 19 and the like so that the soil improvement machine does not leak.

In the case of this embodiment shown in Figs. 1 to 5, only one liquid is injected into one system from the flow path hole 9 through the inner pipes 1' and 1 as shown by the arrow a, but as shown by the arrow It is also possible to separately inject two kinds of soil improvement materials consisting of two liquids into the two systems of the inner and outer pipes by using a separate flow path passing through the outer pipe, and inject them through the flow path holes 9, respectively.

As stated above, the stirring blade expansion device for ground improvement according to the present invention has a structure of 141 years.
The open/closed state of the stirring blades, which are underground and cannot be visually confirmed, can be easily determined by checking the relative position of the inner tube and outer tube of the double tube rod, and the applied force can be adjusted. Work can be done without applying excessive force.

Compared to the conventional wavy line method using water pressure, oil pressure, etc., the mechanism is simpler and there are fewer failures, and the deep mixing method for ground improvement is becoming popular.

4. Figure 1 is a stationary view showing the blade expansion device of the stirring tool according to the present invention. A stop view showing the open state in Figure 1, and Figure 8144 are A-A in Figure 2.
Fig. 5 is a section view of the gland, Fig. 5 is the BB line - ■ open - of Fig. 3, and Fig. 6 is another fruit bi according to the present invention! A square diagram of the enlarged price of a stirring tool, 8147 section 1 (a) ~ ge) is an example of an enlarged price of a stirring tool.
FIG. 8 is an enlarged sectional view showing the hood portions of the inner and outer tubes according to the present invention.

1.1'...Inner tube, 2...Outer tube, 3...Link,
4... Stirring tool, 5... Drilling head, 5a... Window, 6, 7.8... Bin, 9... Channel hole patent user Tenox Koken Drilling Industry Co., Ltd. Company agent Patent attorney Hide Sato Showa 7 (a) (” (b) (C) (d) Puyaku 7n (e) cf) - 1 year 2 figure

Claims (1)

[Claims] In a ground improvement machine that mechanically mixes and stirs soil and ground improvement camphorium such as solidification material using stirring blades, the excavation shaft is a double pipe consisting of an inner pipe and an outer pipe, and the excavation head is installed at the tip of the outer pipe. A stirring blade that opens and closes in accordance with mechanical relative movement between the inner tube and the outer tube is connected in the window portion through a link, and the stirring blade is designed to raise the outer tube with respect to the inner tube. A blade expansion device for stirring blades in a ground improvement machine, which is configured to close the blades by applying an external force.