JPS59106623A - Underground cutting shaft - Google Patents

Abstract

PURPOSE:To construct a continuous underground wall with mutually paralleled pile axes by fitting a guide metal pivotally attached to the rotary shaft of a cutting blade into the H-shaped steel guider of a soil pile formed in the previous process. CONSTITUTION:A guide metal 27 pivotally attached to a rotary shaft 13 is fitted into the H-shaped steel 24 guider of a soil pile formed in the previous process. While turning two rotary shafts 13, a solidifying agent, e.g., cement milk, etc., is injected under the guidance of the H-shaped steel 24, and while fluidizing the excavated soil produced by cutting blades 18 and 19 and the solidifying agent, two excavated holes A of a given depth are formed and then the two rotary shafts 13 are pulled out. A continuous underground wall with mutually paralleled pile axes and free of pile disturbance can thus be constructed without being affected by the hardness or softness of the ground and hard substances buried in the ground.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved technology for underground cutting shafts used to form continuous underground walls.

Conventionally, a continuous underground wall is constructed by connecting one underground pile in sequence, but as shown in Figure 1, for example, when hard objects such as stones are installed underground, When the cutting blade 31 at the tip comes into contact, although the cutting shaft itself has the ability to crush it, the negative cutting force applied to the cutting blade 31 acts biasedly against the cutting shaft 32, so that the cutting Even if the shaft center of the hole is bent, or if the cutting blade 31 passes alternately through the sandy part and clay part in the ground where sandy part and clay part are mixed, the cutting shaft 32 As the tip side escapes to the soft ground side, the axis of the cut hole becomes bent, and especially as the depth of the cut hole gets deeper, the bend of the axis becomes more obvious, and the bottom position of the cut hole becomes Each cut hole is different, causing the so-called disordered pile phenomenon.
This tie had the disadvantage that gaps formed between the piles, making it easy to construct connected underground walls with poor water-stopping properties.

In addition, constructing a continuous underground wall by continuously connecting one underground pile had the disadvantage of being extremely inefficient and requiring a long construction period.

The present invention has been made in view of the above-mentioned circumstances, and
The purpose of this product is to provide an extremely useful underground cutting shaft that can be used to efficiently construct continuous underground walls that do not cause pile piles and have extremely excellent water-stopping properties, while shortening the construction period. A plurality of cutting shafts each having a plurality of cutting blades are placed in a state in which the tip trajectories of the cutting blades are aligned with each other, and each shaft center is held substantially parallel to each other,
A kite fitting that is connected relatively rotatably by a spacing regulating device and that fits into a vertical kite member attached to the H-shaped handle buried in the previous process is attached to one end of the connected cutting shafts. It is characterized in that it is mounted so as to be relatively rotatable above the cutting blade, and in such a manner that the cutting blade tip locus of the cutting shaft on the one end side overlaps the cutting hole formed in the previous process.

Embodiments of the present invention will be described below with reference to the drawings.

Figures 2 to 4 show underground cutting shafts for constructing continuous underground walls. In the figure, reference numeral 1 denotes a guide column erected by a traveling vehicle (not shown), and a pair of guide pipes 2, 2 extending in the longitudinal direction are attached to the column 1.

Reference numeral 3 denotes a cutting shaft drive device that can be raised and lowered along the guide pipes 2, 2, and includes a reduction gear mechanism 4 with a motor and two cutting shafts 5.
, 5 in the same direction, and the gear type transmission mechanism 6 has an input shaft 8 and two The output shafts 9.9 of the output shafts 9.9 are pivotally supported with their axes positioned at the vertices of an isosceles triangle, and gears 10 with the same number of teeth are attached to each of the shafts 8, 9.9. 11 and 11, and then connect the output side gears 11 and 11 to the input side gear 10, respectively.
At the same time, the output shaft 12 of the speed reduction mechanism 4 is connected to the input shaft 8, and the cutting shafts 5, 5 are respectively connected to the output shafts 9, 9 through seven flange connections. The drive device 3 is lifted and lowered by a lift drive device (not shown).

Next, in one of the cutting shafts 5, 13 is a hollow rotary shaft having a blade a at its tip, and a supply pipe 14 for a solidifying agent such as cement milk is connected to the upper end of the shaft through a rotary shaft 15. The solidifying agent can be drawn out from the discharge port 13a at the tip of the shaft as necessary. Reference numeral 17 denotes a cylindrical body provided on the distal end side of the rotary shaft 13 so as to be substantially concentric with the rotary shaft 13, and it is attached to the member 18' and the distal edge of the cylindrical body 17 by a blade body, c, respectively. The cutting earth and sand are located inside the cylindrical body 17, and the outer peripheral surface of the cylindrical body 17 is restrained by the ground, so that the rotation axis 13 in this part
In other words, the cylindrical body 17 serves as a guide body for straight ice cutting.

18..., 19... are both cutting blades, which are provided radially above the cylindrical body 17, and the lower cutting blades 18... have a tip rotation locus that is higher than that of the upper cutting blades. It's a bit small. 20... is a stirring member, and the blades a, b
, a, the cutting earth and sand by the cutting blades 18 and 19, and the solidifying agent from the discharge port 13a, ? fftl cutting blade body 18
..., 19... Next, 21 and 21 are spacing regulators that relatively rotate the rotating shafts 13 and 13 of the adjacent cutting shafts 5°5. a cylindrical body 22 that is freely connected and externally fitted to the rotating shaft 13;
It consists of adjacent cylindrical bodies 22 and a connecting member 23 that spans 22. Then, the adjacent cutting shaft 5 by the spacing regulator 21.21
．． 5 in the connected state, the top one phase of the cutting force body 19 is applied to the adjacent cutting so that the tip trajectories of the cutting blade bodies 19 of each cutting axis 5°5 overlap between the axes. Axis 5
, 5 are different. Therefore, the adjacent cutting shaft 5,
5 are connected by the spacing regulators 21, 21, so that when simultaneously cutting underground ice using the two cutting shafts 5, 5, their axes are held substantially parallel to each other. In other words, it is possible to form underground holes A, A whose axes are substantially parallel to each other.

Next, 24... is an H-shaped steel buried in the underground cutting hole A, and is a pair of underground cutting holes A that have already been formed.

Of A, one hole is always buried in hole A on the side that will form the next underground hole, and of course it is possible to bury it in all holes A, but in any case, one NFL The relative amount of flange 25.25 of type 14 steel 24 corresponding to each buried
A guide member (iL '41- is shown in the figure, but the shape can be any shape such as square steel, flat hole, angle a.1, etc.) 26° 26 is attached to the inside of it. It is.

27 is the kite part g2G, 26 and 7 near it
Fitting percentage 2'7a that fits into the flange edge from above;
A kite metal fitting with a diameter of 2" ta is mounted above the stirring member 20 through its cylindrical body 28 so as to be relatively rotatable with respect to one rotating shaft 13. When the rotating shaft 1 is fitted and connected to the square side member 26 of the H-type WA 24 and the square side metal fitting 27 is attached,
3 and the underground cut hole A formed in the previous step, the axis-to-axis q-measure t is approximately equal to the axis-to-axis dimension t1 of the adjacent rotating shaft 13.13,
The side angle of the kite metal fitting 27 is set so that
When drilling a hole in the ground using the two cutting shafts 5°5 with the guide member 26 and the metal fitting 27 fitted and connected, the shaft of rotation 13 of the force The cutting blade body 19 attached to
In other words, a hole A is formed that partially overlaps the underground cut hole A in the previous process, and when the H-shaped steel 24 is buried, its central axis and When the axes of the cut hole A substantially coincide with each other, the axes of the cut hole A and the two cut holes A, A in the next process can be made parallel to each other with approximately equal intervals.

An example of the procedure for constructing a continuous underground wall C will be explained below. First, two underground piles B are constructed.

B is constructed, but in this construction, the guide fitting 27 is inverted and secured to the spacing regulating device 21 with a scan line, etc., and the cutting shafts 5, 5 are not rotated until the discharge port 13a is opened. , 13i to form two underground cutting holes A, A of a predetermined depth while fluidizing the cutting soil and the solidifying agent, and then two cutting shafts 5, 13i. In this process, the solidifying agent may be continued to be discharged or stopped as necessary, and after the cutting shafts 5, 5 are extracted, an H-shaped copper 24 is inserted into one of the cutting holes A. and insert it into the bottom of the hole J(l f
Press it into H, and ah, that H^1. ! @ki The upper end of 24 is fixed to an above-ground structure (such as a section placed along the underground wall construction part), and with the above, two underground piles B, which are called soil piles, are constructed. After this, the guide metal fittings 27 marked 1" are fitted into the force guide members 26 of the 14-type guide 24 buried in the previous step, and the H-shaped steel 24 is made into a kite, and the guide metal fittings 27 are fitted into the force guide member 26 of the 14-type guide 24 buried in the previous step. underground pile B
, B, so that the pile axes are parallel to each other, l! Furthermore, it is possible to construct a continuous underground wall C that does not cause pile piles without being affected by the hardness or softness of the ground or hard substances underground.

Now, in a horizontal construction with a continuous underground wall C, underground desk I3...
In addition to connecting the kite metal fittings 27 in a straight line, when the kite metal fittings 27 are fitted and connected to the kite member 26, the guide metal fittings 27
By rotating the entire underground cutting shaft around the pivot axis P of the device 3, a concentric drive with the rotating shaft 13 connected to the Middle wall C or cylindrical continuous underground wall C as shown in Figure 5 (b)
Alternatively, it is possible to construct a continuous underground Blc in a freely meandering state as shown in Fig. 5ej.

In addition, continuous underground wall C as shown in Figure 5 (b) and (c)
Although this is a ML because the cutting shaft 5 has two shafts, the present invention also measures the color of a structure in which the cutting shaft 5 has three or more shafts, so that as the number of shafts increases, This not only increases the efficiency of both holes, but also shortens the construction period for underground wall construction.

Next, another embodiment of the kite metal fitting 27 is shown in FIGS. 6 and 7. What is shown in FIG. 6 is an abbreviation of the fitting portion that fits into the edge of the seven runcier 25.

What is shown in No. 71 (J1 kite face 26 mating F
A plurality of r'627a, 27a are provided at locations corresponding to the width direction of the 7 flange 25, and the buried H]j
This is a one-piece structure designed to cope with the size change of J #il 24.

Incidentally, it is also possible to provide the kite fittings 27 on the outside of the kite section side 20.26 flange 25.2Ll and to configure the kite metal fittings 27 accordingly. 26 may be bent or damaged, preferably 7 as shown in the embodiment.
It is inside the lunge 25.

In addition, rflril'4 wide 7 lunge barge is Hkt m
,! The H-shaped knitting 24 shown as 24 has ■-shaped molds C and j called Shoston steel.

As explained above, the underground cutting shaft of the unexploded ψj cuts multiple 9" pieces that overlap the tip locus of the 9j cutting blade, and keeps the axes parallel to each other using the spacing regulator. Therefore, a plurality of interconnected underground cutting holes can be efficiently formed at once by one cutting operation.

Moreover, since the respective axes of the continuous cut holes are almost parallel to each other, the axes of the underground piles constructed based on the cut holes may be disturbed, resulting in an Nr-disturbed pile. It is possible to drill 9 holes underground without any problems.

Moreover, since the above-mentioned plurality of 116 cutting holes are made by using the H-shaped steel as a kite to be embedded in the cutting holes made in the 2nd process, the cutting holes in the 1st process and the next The hole axes of the cutting holes in the process are also parallel to each other, which prevents irregular piles between multiple cutting groups.
Overall, it is possible to construct a watertight continuous underground wall in which the hole axes of all the cut holes are almost parallel to each other, extremely efficiently and with the construction period greatly shortened. We have come to offer an extremely unique underground 9.1 shaft.

[Brief explanation of drawings]

Fig. 1 is a partial side view of a conventional cutting shaft, the second and subsequent factors are related to the present invention, Fig. 2 is a front view showing the main parts, and Fig. 3 is l! Fig. 4 is a plan view, Figs. sV blood diagram of the first alternative embodiment of the metal fitting, and FIG. 7 is a plan view of the second alternative embodiment. 5... Cutting shaft, 18.19... Cutting blade, 21...
N4J spacing regulator, 24...14 type collection, 26...Kite member, 27...Guide metal fittings. Figure 2 Figure 3 Figure 5 Figure 6 Figure 7 Voluntary procedure amendment March 23, 1980 Commissioner of the Japan Patent Office 1 Indication of the case 1981 Patent Application No. 213772 2 Title of the invention Underground Cutting axis 3, relationship with the case of the person making the amendment Patent applicant address: Mr. 6-21-33 Higashi Mikuni, Yodoyo-ku, Osaka City
Name: Tomoyoshi Shinohara 4, Agent ・66 Several aspects of the invention to be improved by amendment (1) As noted in red in the attached drawings of the drawings of the present application, number “18” in Figure 2 "Please correct it to j18', l'. (2) Figures 8, 9, 10, and 11 will be added to the drawings in this application. (3) "And Figure 7" on page 10, lines 8 to 9 of the specification of the present application will be corrected to "through Figure 10." (4) Insert a line break between lines 14 and 15 on page 10 of the same text. 8, 9, and 10 are structurally the same, and the guide fitting 27 is replaced with the guide member 2.
6, and a rotating member 27C connected to the fitting member 27A with a vertical shaft 27B rotatable so as to be relatively rotatable.
The rotating member 27C is fixedly provided on the cutting shaft 5, and in the case shown in FIG. In the case shown in FIG.
, 25 and near the intermediate member 25 &, among others, the guide member 26 shown in FIG. Also, in the configurations shown in FIGS. 8 to 1O, it is possible to construct a continuous underground wall C regardless of the direction in which the H-shaped steel 24 is buried. . That is, in the various configurations up to FIG. 7, the surface of the flange 25 is oriented in the direction of an imaginary line connecting the center of the cutting allowance by the cutting shaft 5 equipped with the guide fitting 27 and the center of the hole formed in the previous process. , it is important to bury the H-shaped steel U,
When the H-shaped steel 24 is buried in such a way that it rotates in the vertical axis direction, it is impossible to form a linear continuous underground wall C unless its orientation is corrected in a predetermined direction, or
In the case of bending the underground wall C, it becomes impossible to orient the H-shaped steel 24 in a direction that is advantageous in terms of strength relative to the earth retaining. Although there is a slight change in the hole center pitch in the configuration,
As shown in Fig. 11, regardless of the orientation of the H-shaped steel U,
In other words, even if the H-shaped steel U is in a buried position in which it is rotated on the vertical axis to some extent, a straight continuous underground wall C can be constructed, or in the case of a bent construction of a continuous underground wall C. , it becomes possible to bury the H-shaped steel 24 in a direction suitable for earth retaining, which is excellent in terms of constructing the underground wall C. ” (5) In the 12th line of the same text, line 14, after “Aru.”, “
8 to 10 respectively show third to fifth alternative embodiments, and FIG. 11 is a plan view showing an example of constructing a continuous underground wall according to the third to fifth alternative embodiments. 9. List of attached documents ■ 1 copy of undrawn drawings (Figure 2) ■ 1 copy of additional drawings (Figures 8 to 11) Hs 2 ) < ・15, l. 21'' 1, Figure 8, Figure 7, Figure 9, Figure 10.

Claims (1)

[Claims] Discharge 1 A plurality of cutting shafts each having a plurality of cutting blades on the tip side are held in a state in which the tip trajectories of the cutting blades overlap each other and in which each shaft center is held substantially parallel. , a guide fitting that is relatively rotatably connected by a spacing regulating device and that fits into a vertical guide member attached to the H-shaped steel buried in the previous process is attached to one end of the connected cutting shafts. The base is mounted so as to be relatively rotatable above the cutting force, and in such a manner that the cutting blade tip locus of the cutting shaft on the one end side overlaps with the cutting hole formed in the previous process. Medium cutting axis. ■ When the kite metal fitting is fitted to the guide member, the distance between the axes of the cutting shaft on which the guide metal fitting is attached and the cutting hole formed in the previous process is the axis of the cutting shaft connected by the distance regulating device. The underground cutting shaft according to claim Q, characterized in that it is configured so that the distance between the centers is approximately equal to the distance between the centers.