JPH0340909Y2 - - Google Patents

Description

[Detailed explanation of the invention] ``Industrial application field'' This invention is used for constructing pits, storage pits, etc. for cables and other underground objects, in addition to earth retaining work that is performed prior to foundation work for houses. This relates to an excavator and agitator for constructing earth retaining walls.

``Conventional technology'' As a construction method for earth retaining, such as earth retaining work prior to foundation work of a house, and underground earth retaining work prior to underground excavation work when constructing an underground structure,
Temporary earth retaining is performed by driving earth retaining steel materials such as H steel and sheet piles at intervals of ~30 cm, and then approximately 20~30 cm
Concrete foundation work will be carried out at intervals of .
After the foundation work is completed, the earth retaining steel material is pulled out and the earth retaining work is completed, which is a common method, but recently, the following devices have been developed as improvements to this method. In other words, a three-shaft auger screw is rotated, and a drilling bit at the tip of this shaft is rotated to excavate earth and sand in three cylindrical shapes, while pumping cement milk into the excavated earth. At the same time, three cylindrical retaining wall pieces are constructed by kneading the excavated soil and cement milk through a stirring blade provided on the shaft. Thereafter, a triaxial auger excavator and agitator for earth retaining walls, which inserts and buries earth retaining steel materials into the wall pieces for this earth retaining wall, has been put into practical use. In addition, as other technical documents, Tokkosho
No. 49-5402 rotary cutter type excavator, Tokkosho
There is a pit excavator No. 56-46015, and its gist is that a pair of rotary cutters are installed at the lower end of the main body frame to excavate a rectangular groove and suck up excavated earth, sand, and muddy water to the ground through a drain pipe. It is a mechanism.

``Problem that the invention attempts to solve'' By the way, according to the conventional general earth retaining method, as mentioned above, the earth retaining wall can only be constructed approximately 40 to 60 cm from the boundary line, and this 40 to 60 cm This is a problem because not only is a large amount of land left unused, but also buildings with long boundaries or buildings with many floors, such as mid-to-high-rise buildings, have a large amount of unused floor space. Furthermore, according to the improved three-shaft auger earth retaining excavator and agitator, although an earth retaining wall is constructed somewhat near the boundary line, it is not much different from the general method described above, and in particular, After construction of the earth retaining wall is completed, it is necessary to scrape or cut the arc-shaped protrusion on the inner wall surface, which requires a lot of time and effort, and poses problems in terms of workability and cost. Furthermore, the invention according to the above-mentioned technical document is a mechanism for excavating a rectangular trench using a rotary cutter and sucking and discharging excavated earth, sand, and muddy water to the ground through an earth discharge pipe. However, the excavator and mixer of the present invention is used to construct earth retaining walls by excavating and kneading, and its purpose is different.

``Means for Solving the Problems'' The present invention solves the above-mentioned problems and provides an excavator and agitator for constructing earth retaining walls that can construct earth retaining walls all the way along the boundary line. The gist is a drive mechanism body that includes a gear mechanism, a hydraulic motor, and a pulley, each equipped with a gripping ring that is loosely fitted into the guide of the crane leader, and two gear boxes that hang down from the drive mechanism body. A casing for the rotating shaft provided at appropriate intervals, a cement milk pipe hanging from the drive mechanism body and located between the casings, and gears installed in a large number of gear boxes of the two casings. , a large number of stirring members each consisting of a set of rotatable stirring blades mounted on the gear, a gear mounted in a gear box at the lowest end of the casing, and an outer peripheral surface mounted on the gear. The excavating member is made up of a set of rotary excavating plates having a large number of pickles, and a steady rest member is fixed to the guide of the leader and has a hole through which the agitating member can pass.

``Function'' Next, to explain the outline of the function of the present invention, first, the excavator and agitator is installed at a predetermined position at the starting end along the line on which earth retention is to be carried out, and the excavator and agitator is lowered while being driven, and its rotation is performed. When the rotating shafts of the mechanism are rotated, the rotation of the rotating shafts is transmitted to the excavating member and the stirring member through the bevel gear transmission mechanism. Therefore, the excavating rotating plate and the stirring blade rotate in the direction of the arrow in the drawing (in reality, the excavating and stirring machine is in a suspended state, so the excavating rotating plate and the stirring blade rotate in the vertical direction), The earth and sand are excavated with the pickle of this excavation rotary plate, and the earth and sand corresponding to the wall pieces for the earth retaining wall, which have a narrow rectangular shape and reach deep underground, are excavated one after another on the earth retaining line. . During this excavation process, cement milk is pumped through the pipe, and the excavated soil and cement milk are thoroughly kneaded using stirring blades. When the excavation of earth and sand to a predetermined depth and the pumping of a predetermined amount of cement milk are completed, the excavator and agitator is lifted, and a wall piece for an earth retaining wall is constructed underground. Next, the excavator and stirrer is moved along the earth retaining line, leaving an undeveloped part corresponding to approximately the same length as the wall piece for the earth retaining wall in the part following the wall piece for the earth retaining wall, First, by the above-mentioned steps of excavation, pumping of cement milk, and kneading, a narrow rectangular wall piece for an earth retaining wall that goes deep underground is created, and the same process is repeated. A wall piece for an earth retaining wall that has a narrow rectangular shape and extends deep into the earth is placed on the earth retaining line, and a gap of approximately the same length as the wall piece for an earth retaining wall is placed between each wall piece for the earth retaining wall. Build the area leaving the building area intact. After the required time, preferably about one day, has elapsed and the wall pieces for the earth retaining wall have hardened, the undeveloped area will be excavated in the same manner as described above, and cement milk will be pumped and kneaded to form the wall for the earth retaining wall. A piece is created, connected to the hardened wall piece for the earth retaining wall, and then hardened. By repeating this work in undeveloped areas, a series of retaining walls will be constructed on the retaining line. Also, depending on the case, a construction method other than the above-mentioned example is possible. For example, if one wall piece for an earth retaining wall is constructed as described above, another wall piece for an earth retaining wall can be constructed next to it. This is a method in which a series of earth retaining walls are constructed on the earth retaining line by continuous land reclamation.

``Example'' Next, the present invention will be explained in detail with reference to the apparatus shown in FIGS. 1 to 5 and the process diagram shown in FIG. 6.
1 is a crane truck, and 2 is its boom. This boom 2 is provided with a leader 3 that can rotate 180 degrees. 4 is a guide for the reader 3; An excavator and agitator, which will be described later, is suspended from the leader 3 in a substantially vertical manner via a pulley 5, and this excavator and agitator moves up and down along the guide 4 of the leader 3 by winding and unwinding a rope 6. It is something. 7
is an excavator and agitator, and its configuration will be explained in detail. It includes a gear mechanism 9 equipped with a grip ring 8 loosely fitted to the guide 4, a hydraulic motor (not shown), and a pulley for locking the rope 6 (not shown). A drive mechanism main body 10 each having a drive mechanism main body 10 and two rotating shaft casings 1 hanging from the drive mechanism main body 10.
1, 11a (hereinafter, parts of the same structure that are similarly suspended and arranged in two rows are given the same reference numerals and the letter a) and this casing 11,
Cement milk pipe 12 located between 11a
and rotating shafts 13, 13a inserted into the former casings 11, 11a, and the rotating shafts 13, 1
3a is connected via bevel gear transmission mechanisms 14, 14a installed in box-shaped gear boxes 16, 16a provided at appropriate intervals in the casings 11, 11a, and rotates integrally with the casings 11, 11a. 13, 13a and bevel gear transmission mechanism 14, 14
rotating shaft mechanisms 15, 15a in combination with a;
The rotating shaft mechanism 1 is connected to the bevel gear transmission mechanism 14, 14a located at the lowest end of the rotating shaft mechanism 15, 15a.
5, 15a, a set of two disk-shaped excavation rotary plates 18, 19, 18a, 19a (left and right as shown in the drawing of FIG. 5) and this excavation rotary plate 18. , 19, 18a, 19a.
1 and 21a, and a set of twisted two pieces ( Stirring members 23, 23a having stirring blades 22, 22a (left and right shown in the drawing of FIG. 4), the rotating shaft mechanism 15,
The stirring member 2 includes a support ring 26 fixed to the guide 4 of the leader 3 provided at the lower part of the stirring member 15a.
3, 23a and a steady rest member 25 having a hole (not shown) through which the casings 11, 11a pass, and a support provided at approximately 2/3 of the casings 11, 11a to maintain the distance between the casings 11, 11a. It is composed of a member 24. Then, the rotating shaft mechanisms 15, 15a are rotated through the gear mechanism 9 by the drive of the motor.
The rotation shafts 13, 13a at the upper ends of the inner shafts are rotated, and the rotation of the rotation shafts 13, 13a is transferred to the next rotation shafts 13, 13 via the bevel gear transmission mechanisms 14, 14a.
transmitted to a. In this way, the rotating shafts 13, 13a and the bevel gear transmission mechanisms 14, 14a are rotated one after another, and the bevel gear transmission mechanism 1
A large number of stirring blades 22,
22a and the excavation rotary plates 18, 19, 18a, 19a with pickels 20, 20a are rotating, the rotation shaft mechanisms 15, 15a and the stirring members 23, 23a are sequentially or ascending, and the excavating members 21, 2 are being rotated.
1a also has a structure that descends or rises,
When this descending or ascending, the stirring member 23,
23a and the casings 11, 11a pass through holes in the steady rest member 25. The set of excavation rotary plates 18, 19, 18a, 19a is mounted so that its lower part swings inward, as shown in FIG. The pickle 2 of both excavating rotary plates 18, 19, 18a, 19a is configured to converge.
0, 20a, it is preferable to minimize the unexcavated portions that are difficult to excavate (the areas between the pickles 20, 20 and between 20a, 20a are likely to be formed) as much as possible. In this case, the bevel gear transmission mechanism 14, 14a is deformed as shown in the figure. . In the figure, 28 is a reinforcing steel material. Furthermore, a bevel gear transmission mechanism 1 is installed in the casings 11 and 11a.
Gear boxes 16, 16 in which gears 4, 14a are provided
a is the casing 1 as shown in FIGS. 4 and 5.
It is somewhat bulged out compared to 1 and 11a.

In order to carry out earth retaining work on sandy soil using such an excavator and stirrer, first stop the casing vehicle 1 at a predetermined position at the starting point of the earth retainer, and then move the excavator and stirrer at a small distance from the boundary line 30. Place the stirrer 7 as shown in Figure 6A. In this case, the excavator and agitator 7 is in an inclined state with respect to the boom 2 as shown in FIG. 6C. Therefore, the motor is turned on to drive the excavator and agitator 7, and the gear mechanism 9 and rotating shaft mechanism 1 are
The excavating members 21, 21a and the stirring members 23, 23a are rotated in the so-called vertical direction, which is the same as the excavating direction, through the excavating members 5, 15a, etc. As a result, earth and sand are excavated by the pickaxes 20, 20a of the excavating members 21, 21a, and at the same time, the excavated surface agitator 7 excavates underground. In this way, when the excavation and agitator 7 sinks underground to a certain extent, cement milk is spouted into the excavated earth and sand from the pipe 12, and at the same time, the cement milk is pumped into the excavated earth and the stirring blades 22 of the stirring members 23, 23a, 22
Both are kneaded through a. In this way, the excavator and agitator 7 gradually sinks into the ground, and
The excavated soil and cement milk are mixed by stirring by the stirring blades 22 and 22a, and after the excavating and stirring machine 7 has settled to a predetermined position, when it is lifted up, a part of the earth retaining wall, so-called wall piece 31, is created. Ru.
Further, in order to increase the strength of the wall piece 31, reinforcing steel material 28 may be inserted into the wall piece 31 when it is only partially dry. Since the excavating and stirring machine 7 does not have a screw blade or the like, the excavated soil is rarely transported to the ground, and is mixed with cement milk, so that the excavated soil becomes aggregate. Furthermore, if the excavating members 21 and 21a are rotated facing each other as shown by the arrows in FIG.
is sinking straight into the ground, so the exact wall piece 3
It has the effect of creating 1.

Next, the crane truck 1 is moved forward by approximately the same distance as the wall piece 31, leaving an undeveloped area, and the excavation and agitation machine 7 is placed ahead of it, and after that, the excavation and agitation machine 7 is driven in the same manner as described above. Wall pieces 31 for retaining walls having a narrow rectangular shape and reaching deep into the ground are constructed, and the wall pieces 31 for retaining walls are placed at predetermined intervals over the entire earth retaining area as shown in FIG. 6D. It is constructed intermittently underground.

Then, desirably, after about one day has passed and the wall pieces 31 for each earth retaining wall have hardened, the excavator and agitator 7 is moved to the sixth
It is installed as shown in Figure E, and the undeveloped portions between the wall pieces 31 for each earth retaining wall are excavated using the excavator and agitator 7, and the wall pieces 32 for the earth retaining wall are created by pumping and kneading cement milk. , and connect them as shown in Figure 6. By repeating these operations one after another, a continuous earth retaining wall as shown in Figure 6-T will be constructed over the entire area to be earth-retained.

As mentioned above, a series of retaining walls can be constructed on the retaining line by operating this excavator and agitator to continuously create wall pieces for the retaining wall, so a detailed explanation will be omitted. do.

``Effects of the invention'' As detailed above, this invention places an excavator and agitator with a small distance between it and the boundary line, etc.
An earth retaining wall can be constructed by operating the drive mechanism body, stirring member, excavating member, etc. of this excavation and agitator, so a continuous earth retaining wall can be constructed across the entire boundary line, achieving effective use of land, and solving the conventional problem. This is very meaningful for residents and construction workers, as it prevents the neighboring ground from loosening and houses from leaning, which eliminates various problems. Furthermore, since it can be installed as is after construction, there is no need to pull out H-shaped steel, sheet piles, etc. as in the past, and it can be expected to simplify the construction work, maintain and manage equipment, and shorten the construction period. In particular, the present invention differs from the conventional excavation and agitation machine for three-shaft auger earth retaining, as it has a narrow rectangular shape and is a wall piece for earth retaining walls that reaches underground, making it easier to perform cutting and other work after construction. It is very reasonable to simplify the construction, shorten the construction period, and reduce costs.

[Brief explanation of the drawing]

Fig. 1 is an overall front view showing an example of an apparatus for carrying out the present invention, Fig. 2 is an enlarged side view showing an example of an excavator and agitator according to the invention, Fig. 3 is an enlarged front view of the same, and Fig. 4 5 is an enlarged front view of the stirring member, FIG. 5 is an enlarged front view of the excavating member, and FIG. 6 is a process explanatory diagram showing an example of the construction order. 1... Crane truck, 2... Boom, 3... Leader, 4... Guide, 5... Pulley, 6... Rope,
7...Drilling and stirring machine, 8...Gripping ring, 9...Gear mechanism, 10...Driving mechanism main body, 11, 11a...
Casing, 12... Pipe, 13, 13a...
Rotating shaft, 14, 14a...Bevel gear transmission mechanism, 1
5, 15a...rotating shaft mechanism, 18, 18a, 1
9, 19a...Drilling rotating plate, 20, 20a...Pickel, 21, 21a...Drilling member, 22, 22
a... Stirring blade, 23, 23a... Stirring member, 2
4... Support member, 25... Steady rest member, 30...
... Boundary line, 31, 32... Wall piece.

Claims (1)

[Scope of Claim for Utility Model Registration] A drive mechanism body comprising a gear mechanism, a hydraulic motor, and a pulley each internally equipped with a gripping ring that is loosely fitted into the guide of the leader of a crane vehicle, and two shafts hanging from the drive mechanism body. a casing for the rotating shaft, which is provided with gear boxes arranged at appropriate intervals; a cement milk pipe that hangs down from the drive mechanism body and is located between the casings; and a large number of gear boxes in the two casings. A gear to be installed, a large number of stirring members consisting of a set of rotatable stirring blades mounted on the gear, a gear installed in a gear box at the lowest end of the casing, and a gear mounted on the shaft to the gear. An earth retaining wall consisting of an excavating member consisting of a set of excavating rotary plates having a large number of pickles on the outer peripheral surface to be installed, and a steadying member fixed to the guide of the leader and provided with a hole through which the agitating member can pass. Excavator and agitator for construction. The excavating and stirring machine for constructing earth retaining walls according to claim 1, wherein a set of excavating rotary plates are converged downward.