KR20160024563A - Ground excavating device having function of auto up and down of excavating rod for construction continued wall preventing water flowing of underground - Google Patents

Abstract

The present invention relates to a ground excavating apparatus having a function of an automatic lifting excavating rod for constructing a continued underground watertight wall, comprising: an auger drive unit, a gear box installed to be positioned below the auger drive unit, a plurality of rotational shafts rotationally installed to protrude from a lower side of the gear box, and a plurality of excavating rods respectively installed to be connected to lower ends of the plurality of rotational shafts, wherein one or more rotational shafts selected from the plurality of rotational shafts include one or more lifting rotational shafts inserted to slide up and down in a slide insertion hole formed at the center of a bearing part rotationally installed in the gear box to receive rotational power from the auger driving unit and installed to rotate together with the bearing part; a vertical extending portion vertically formed upwards at an upper end of the lifting rotational shaft; and a hydraulic device including a cylinder fixed on the upper surface of the gearbox vertically and a piston rod installed to be protracted from or retracted into an upper end of the cylinder and having a front end connected to a fixating edge formed to cover an upper end of the vertical extending portion such that the vertical extending portion can rotate, and formed to lift the lifting rotational shaft at a predetermined interval up and down even in a state that the lifting rotational shaft is rotated.

Description

Technical Field [0001] The present invention relates to a ground excavating apparatus for an underground water continuous wall construction having an automatic elevating and lowering function,

The present invention relates to a ground drilling apparatus for an underground water continuous wall construction having an automatic lifting / lowering function of a drill rod, and more particularly to a lifting and lowering function for lifting and lowering a drill rod separately from a lifting operation of an auger drive unit, When excavating a harder layer than an underground stratum previously excavated at the time of excavation, the excavation work of a hard stratum can be efficiently carried out by means of automatically lifting only one or more excavation rods selected from a plurality of excavation rods performing ground excavation operations The present invention relates to a ground excavation apparatus for an underground water continuous wall construction having an automatic elevating and lowering function.

Generally, in the ground excavation equipment used to improve the soft ground or to construct the underground continuous wall, etc., 1 ~ 5 excavation rods for excavating the ground at a certain depth are vertically connected to each other to excavate the ground .

A conventional ground excavation apparatus is installed to move upward and downward along a leader installed vertically upwards from the ground by a crawler crane fixedly installed on the ground to move excavation work while moving freely from the ground.

The conventional ground excavation apparatus includes an auger drive unit to which at least one motor is mounted, a gear box installed to be positioned below the owner drive unit and configured to receive power of the motor, A plurality of rotation shafts installed in a state in which a plurality of gears are meshed with each other and protruded to a lower end of the gear box, and a plurality of connection rods connected to each of the plurality of rotation shafts protruding to the lower end of the gear box, And a plurality of excavation rods connected to a lower end of each of the plurality of connection rods in a vertical phase to excavate the excavation of the ground, and each of the plurality of connection rods and excavation rods includes a cement paste And a supply pipe for supplying pneumatic or chemical (cement paste quick-setting, etc.).

Therefore, in the conventional ground excavation apparatus, when the construction for improving the soft ground or proceeding to construct the underground water wall is performed, the underground is excavated to a certain depth, and then a plurality of excavation rods for excavating the underground are rotated, The soft ground is improved or the continuous wall is formed in the underground by a means for evenly mixing the pneumatic pressure, the cement paste, the chemicals, etc. discharged to the lower end of each excavation rod onto the excavated soil, It is possible to excavate the underground by an operation of rotating a plurality of excavation rods.

However, in a conventional ground excavation apparatus, a plurality of excavation rods that rotate by receiving a rotational force from an auger drive unit moving upward and downward along a leader vertically installed on the ground are equally lowered according to the descent speed of the auger drive unit The excavation operation of a plurality of excavation rods can be smoothly performed when the underground stratum structure having a predetermined depth to be excavated is constructed of the same strength, for example, a weak stratum structure, In the case where a hard layer is formed under a weak structure layer, there is a phenomenon in which the descending speed at the time of excavating the hard layer is lower than the descending speed when the plurality of excavation rods excavate the weak layer, The strata correspond to the excavating operation of the excavation rods The rigid strata will not have a good excavation operation due to the considerable resistance corresponding to the excavation operation of the excavation rods, and also when the plurality of excavation rods are excavated in a hard layer When a plurality of excavation rods are lowered at a descending speed that is faster than the excavation speed at which excavation roads dig into a hard layer, an error occurs in each connecting portion of a plurality of excavation rods or a failure occurs in the auger drive unit and the gear box It has been pointed out that the problem can be solved.

Korean Registered Patent No. 10-1179604 (Announcement 2012. 09. 05.) Korean Registered Patent No. 10-1186230 (Bulletin 2012. 09. 27.) Korean Registered Patent No. 10-1230320 (Bulletin 2013. 02. 06.) Korean Registered Patent No. 10-1187747 (Bulletin, Oct. 04, 2012) Korean Registered Patent No. 10-1219377 (Announcement 2013. 01. 10.) Domestic Registration No. 10-1170656 (Bulletin 2012. 06. 02.)

The present invention has been made in view of the above-mentioned problems encountered in the conventional ground excavation apparatus, and it has been proposed that a plurality of excavation rods vertically connected to the auger drive unit of the ground excavation apparatus, The excavation operation is continued by rotating the excavation rods at the same speed as the excavation of the weak ground stratum at the same time as rotating the excavation rods at the same speed, It is possible to efficiently perform the ground excavation work in which the mounted hydraulic device is capable of automatically lowering and raising the selected one or more excavation rods among the plurality of excavation rods so that the soft ground layer and the hard ground layer are mixed and formed .

The present invention, as a means for pursuing the above object,

An auger drive unit installed to vertically move upward and downward along a leader vertically fixed on a ground or water surface; and an auger drive unit which is positioned below the auger drive unit and receives rotational power from the auger drive unit A plurality of connecting rods connected to the plurality of rotating shafts in a vertically multi-stage connection, and a plurality of connecting rods connected to the plurality of connecting rods, And a plurality of excavation rods connected to the lower ends of the excavation rods,

The at least one rotary shaft of the plurality of rotary shafts is slidably inserted into a slide insertion hole formed at the center of a shaft receiving portion rotatably installed in the gear box so as to receive rotational power from the auger drive unit One or more lifting and lowering shafts installed to rotate together with the shaft receiving portion;

A vertical extension shaft formed vertically upward from an upper end of the lifting / lowering shaft;

A cylinder fixedly installed on an upper surface of the gear box, and a tip connected to a fixed rim that is installed to protrude from the upper end of the cylinder and surrounds an upper end of the vertically extending shaft such that the vertically extending shaft is rotatable A hydraulic pressure device which is constituted by a piston rod and is capable of moving upward and downward at a predetermined interval in a state in which the elevating rotary shaft is rotating;

And a control unit.

In addition, the inner surface of the slide insertion hole formed at the center of the shaft receiving portion rotatably mounted on the gear box is formed in a hexagonal shape in cross section, and the outer surface of the elevation rotation shaft inserted into the slide insertion hole of the shaft receiving portion, And is formed to have a hexagonal cross-section so as to be able to slide down and to receive rotational force from the bearing water receiving portion and rotate as the bearing water portion.

The vertical extension axis is formed to have a diameter smaller than that of the hexagonal section of the elevation rotary shaft. A screw blade and a rod blade are not formed outside the excavation rod, which is vertically connected to the lower end of the elevation rotary shaft, And a hammer drill rod having an auger head and a drill bit formed thereon is connected to the lower end of the excavation rod.

In addition, the cement pools and the finely crushed soil are stirred in the screw vanes formed on the outer periphery of the plurality of excavation rods, while the agitation grooves capable of transporting the pebbles, And is formed at an interval.

According to the present invention, when a construction for improving the foundation or the soft ground for constructing the underground continuous wall is carried out by using the ground excavation apparatus, even if the hard ground layer is excavated during the excavation of the soft ground, The excavation operation is continued by the operation of the auger drive unit at a constant speed while being rotated at the same rotational speed by the operation of the auger drive unit, and at the same time, at least one excavator rod selected as a hydraulic device installed on the upper surface of the gear box and connected to the lower end thereof When the hammer drill rod is lowered to a certain depth lower than other drilling rods and the ground is excavated and immediately returned to the original position by the ascending operation, a cavity is formed in the stratum where a plurality of excavating rods are performing the excavating operation , And because of the phenomenon that the pores are formed in the ground layer, Because of the strength can be weakened so easy to collapse, so the effect of the soil excavation works so well done that it is an advantage that allows you to efficiently applied by the soil excavation for building underground continuous wall-order.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front structural view of an auger drive unit showing a part of a girder box of a ground excavation apparatus for explaining the present invention;
2 is a sectional view taken along the line AA in Fig. 1
3 is a view showing a state of assembling a plurality of excavation rods connected to a plurality of rotary shafts mounted on a gear box of a ground excavation apparatus of the present invention
Fig. 4 is a diagram showing a descending operation state diagram of a hydraulic excavator mounted on a gear box of a ground excavation apparatus according to the present invention,
5 is a view showing a drilling rod descending operation state diagram in which a drilling rod selected by a piston rod descending operation of a hydraulic apparatus equipped with a gear box of a ground excavation apparatus of the present invention is lowered to a certain depth
6 is a sectional view taken along line BB of Fig. 3

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings, in which like reference numerals refer to like elements throughout.

The ground excavating equipment 1 is connected to the front end of a crawler crane fixedly installed on the ground, and is connected to a vertically upward (not shown) And a gear box 3 fixedly installed on the lower side of the auger drive unit 2. The auger drive unit 2 is provided with two motors and the motor And a planetary gear reducer for decelerating the rotation output of each of the planetary gear reducers is mounted. The drive shafts 2a and 2b, which are rotated by the respective planetary gear reducers, are rotatably inserted into the gear box 3 have.

The gear box 3 is provided with a plurality of rotation shafts rotatably mounted on the gear box 3 to receive rotational power from the drive shafts 2a and 2b. The gear box 3 includes left and right rotation shafts 3a 3b are mounted on the upper and lower surfaces of the gear box 3 in such a manner that the upper and lower ends thereof are rotatably supported by the bearing structure. The rotation shaft formed at the center of the plurality of rotation shafts is connected to the gear box 3, And a lifting / lowering shaft 3c which is slidably movable upward and downward at the center of a shaft receiving portion 31 provided to be rotatable by a bearing structure on the upper and lower surfaces of the shaft.

Left and right drive shafts 2a and 2b, in which rotation outputs of two motors provided on the auger drive unit 2 are decelerated and rotated from the planetary gear reducer, are rotatably mounted on left and right sides of the gear box 3, The left and right rotation shafts 3a and 3b and the elevation rotation shaft 3c are disposed between the left and right drive shafts 2a and 2b so as to rotate as the left rotation shaft 3a. The interlocking gear 23 that is held on the rotating shaft 3a meshes with the left driving gear 21 provided to rotate together with the left driving shaft 2a and rotates together with the right rotating shaft 3b The interlocked gear 24 is engaged with the right driving gear 22 provided on the right driving shaft 2b and is coupled to the lifting and rotating shaft 3c provided between the left and right rotating shafts 3a and 3b The left and right rotation shafts 3a and 3b are respectively engaged with the interlocked gear 25, Are two idle gear 25, 26 mesh with interlocking gears 23, 24 is set up accordingly with axially mounted it consists of a structure to be engaged at the same time.

Therefore, the left and right rotation shafts 3a and 3b, which are rotatably installed in the gear box 3, and the elevation rotation shaft 3c are configured to rotate in the same direction. For example, when the left and right driving gears 21 and 22 rotate in the counterclockwise direction as shown in Fig. 2, the left and right rotation shafts 3a and 3b and the lift rotation shaft 3c And is configured to rotate clockwise.

The upper ends of the left and right rotation shafts 3a and 3b which are rotatably installed in the gear box 3 protrude from the upper surface of the gear box 3 and the left and right rotation shafts 3a and 3b And sweepers 4a and 4b for supplying cement paste are respectively installed at the upper end of the slider.

A lower end of each of the left and right rotation shafts 3a and 3b projects downward from the lower surface of the gear box 3 and air pressure and chemicals are supplied to the lower ends of the left and right rotation shafts 3a and 3b. (5b) are provided on the left and right sides, respectively.

The lifting and lowering rotary shaft 3c is inserted into a shaft receiving portion 31 which is rotatably mounted on the upper and lower surfaces of the gear box 3 so as to be slidable upward and downward. The portion 31 is configured to rotate together.

The lifting / lowering shaft 3c is formed in a hexagonal cross-sectional structure as shown in the drawing. The lifting / lowering shaft 3c having a hexagonal cross-sectional structure is slidably movable at the center of the lifting / lowering portion 31 There is formed a slide insertion hole 32 having an inner surface of a hexagonal structure to be inserted.

The elevating rotary shaft 3c and the slide insertion hole 32 may be configured to be slidable in a hexagonal cross-sectional structure as shown in the drawing, or may be configured to be slidably coupled in a spline structure have.

A vertically extending shaft 33 is formed at an upper end of the lifting and rotating shaft 3c at a predetermined height and a swivel 4c for supplying a cement paste is provided at an upper end of the vertical extending shaft 33 , And the vertical extension shaft 33 is formed to have a smaller diameter than the elevation rotation shaft 3c (see Fig. 2). [

Since a bearing (not shown) is interposed between the upper end of the lifting and lowering rotary shaft 3c and the fixed frame 34, the lifting and lowering rotary shaft 3c The fixed frame 34 does not rotate.

On the upper surface of the gear box 3, there is formed a hydraulic device 6 for elevating and lowering one or more elevating rotary shafts 3c provided between the left and right rotary shafts 3a and 3b at a predetermined height The hydraulic device 6 is disposed on the upper surface of the gear box 3 so as to be located on the left and right sides of the elevating and rotating shaft 3c in order to allow one or more lifting and lowering shafts 3c to be lifted up and down. A plurality of cylinders 61 which are vertically installed with their lower ends fixed and a plurality of piston rods 62 which are projected and operated from the upper end of each of the plurality of cylinders 61.

The hydraulic device 6 is also provided with a plurality of piston rods 62 protruding into and retracting from the upper ends of the plurality of cylinders 61. The distal ends of the piston rods 62 are fixed to the fixed rim 34 As shown in Fig.

Therefore, when the hydraulic device 6 is operated and the plurality of piston rods 62, which are mounted on the plurality of cylinders 61 so as to be able to retract and retract, are moved from the emergence operation to the immersion operation, the elevation rotation axis 3c is moved upward It is moved up and down.

One male joint 35 is formed at the lower ends of the left and right rotation shafts 3a and 3b and the lift rotation shaft 3c protruding from the lower surface of the gear box 3. The left and right rotation shafts A female joint (not shown) formed on the upper ends of the connecting rods 7a, 7b and 7c is connected and assembled to each of the male joints 35 formed at the lower ends of the respective upper and lower rotating shafts 3a, 3b, will be.

The left and right rotation shafts 3a and 3b projecting from the lower surface of the gear box 3 and the plurality of connection rods 7a and 7b and 7c connected to the lower ends of the elevation rotation shafts 3c A plurality of excavation rods 8a, 8b and 8c for excavating the ground are connected to the lower ends of the excavation rods 8a, 8b and 8c, and the left and right rotary shafts 3a and 3b, A screw blade 81 formed in a spiral shape is formed on the left and right drilling rods 8a and 8b connected to the lifting and lowering shaft 3c, And a screw vane 81 is also formed on the lower end excavation rods 8a-1 and 8b-1 connected to the lower ends of the left and right excavation rods 8a and 8b, .

As shown in FIG. 6, the screw vanes 81 formed in the plurality of excavation rods 8a, 8b and the lower excavation rods 8a-1, The cement paste discharged through the discharge port 83 formed at the lower side of each of the lower end excavation rods 8a-1, 8b-1 and the soil gravel 82 are formed in the cut- The crushed stone, the gravel, and the gravel are not transferred to the incision grooves 82 but are moved upward and downward along the screw vanes 81, The excavating rod 8c connected to the rotary shaft 3c and the hammer drill rod 8c-1 connected to the lower end thereof are each formed in a flat structure without a screw blade vane.

Therefore, the left and right lower end excavation rods 8a (8a, 8b) connected to the lower ends of the plurality of excavation rods 8a, 8b, 8c connected to the left and right rotation shafts 3a, 1) 8b-1 and the hammer drill rod 8c-1 are rotatably fastened to each other by the connecting band 9, the elevating and lowering rotary shaft 3c moves upward and downward at regular intervals, The drill rod 8c can be moved upward and downward while being rotatably constrained to the connecting band 9. [

The lower ends of the left and right lower end drilling rods 8a-1 and 8b-1 and hammer drill rod 8c-1, which are rotatably tied to the connecting band 9, A hammer drill bit 85 is mounted on the lower end of the hammer drill rod 8c-1 to rotate while hitting the ground.

When the soft ground is excavated to excavate the ground in order to construct an underground continuous wall in the basement or excavate a pile of a certain depth in the underground, the ground excavating apparatus of the present invention having the above- The piston rod 62 of each of the plurality of cylinders 61 constituting the hydraulic device 6 provided on the upper surface of the gear box 3 is caused to ascend and upwardly move so that the ascending and descending rotary shaft 3c is rotated as shown in Fig. The lower ends of the lift shaft 3c and the lower ends of the left and right rotation shafts 3a and 3b are protruded to the lower side of the gear box 3 at the same height And a plurality of excavation rods 8a, 8b and 8c are installed at the same height as the excavation rods installed in the existing ground excavation equipment as shown in FIG. 3, do.

However, when a plurality of excavation rods 8a, 8b, 8c are installed as shown in FIG. 3 and a hard ground layer is excavated during the excavation of a weak ground, excavation of a hard ground layer is not performed well A large load is applied to the lower ends of the lower end excavation rods 8a-1 and 8b-1 and the hammer drill rods 8c-1 connected to the respective excavation rods 8a, 8b and 8c, The hydraulic device 6 provided on the upper surface of the gear box 3 is operated to immerse the piston rod 62 mounted on each of the plurality of cylinders 61 so as to move the elevation rotary shaft 3c The drilling rod 8c and the hammer drill rod 8c-1 connected to the lower end of the lifting and lowering shaft 3c are moved downward by the left and right drilling rods 8a The descending rotary shaft 3c is lower than the lower end excavating rods 8a-1 and 8b-1, While it will be lowered to excavate the ground.

The hammer drill rod 8c-1 is connected to the left and right excavation rods 8a and 8b by the lower excavation rods 8a-1 and 8b-1 as the elevation rotary shaft 3c is lowered, The lower end excavation rods 8a-1 and 8b-1 connected to the lower ends of the left and right excavation rods 8a and 8b are connected to the hammer drill rods 8c 1 is in a state of being excited in the stratum that is undergoing the excavation operation, so that only the hammer drill rod 8c-1 is in a state in which excavation operation proceeds, so that the drive unit 2 and the gear box 3 ) Is concentrated on the hammer drill rod 8c-1 so that the hammer drill rod 8c-1 can perform an operation of excavating the hard layer, and the operation of lowering the lift-up rotary shaft 3c (Lowering operation) is performed immediately after the elevating and lowering rotary shaft 3c is lowered at regular intervals downward, The hammer drill bit 3c is moved upward to return the elevation rotary shaft 3c to the original position by lowering the elevation rotary shaft 3c downward as the piston rod 62 is moved upward Hole 84 is formed at the bottom of the hammer drill bit 84. The drilling operation of the hammer drill rod 8c-1 on the hard layer causes the pore The lower end excavation rods 8a-1 and 8b-1 connected to the lower ends of the left and right excavation rods 8a and 8b are rotated by the pressure caused by the lowering excavation operation, So that the ground excavation operation and the stirring operation can be performed well.

Since the hydraulic device 6 can be adjusted so that the operation of raising and lowering the lifting and lowering shafts 3c is automatically performed, when the ground is excavated in order to construct an underground continuous wall in the underground, the hydraulic device 6 The ground excavation operation can be carried out rapidly, so that it is possible to shorten the air for construction of the underground continuous wall.

The incision grooves 82 formed at regular intervals in the screw vanes 81 spirally formed on the left and right excavation rods 8a and 8b are formed on the lower excavation rods 8a-1 and 8b- The cement paste discharged through the discharge port 83 formed on the lower side of the cement paste is mixed with the gypsum while the rocks, gravel or gypsum mixed with the excavated gypsum are transported upward, So that the cement paste is well mixed with the soil.

As described above, the ground excavation apparatus of the present invention automatically operates the hydraulic device 6 installed on the upper surface of the gear box 3 to perform the ground excavation work in order to construct the underground continuous wall, The lower end excavating rods 8a-1 and 8b-1 connected to the left and right excavation rods 8a and 8b as the hammer drill rod 8c-1 descends the elevation rotary shaft 3c, 1), the ground is excavated with the lower ground excavation rod 8a-1 (8b-1), so that a hollow space (pupil) is formed in the ground layer to be excavated by the lower excavation rod 8a-1 So that the ground excavation work can be efficiently carried out.

1: ground excavation device 2: auger drive unit
2a, 2b: drive shaft 21.22: drive gear
23, 24, 25: interlock gear 26, 27: idle gear
3: gear box 3a, 3b:
3c: lifting and lowering shaft 31:
32: slide insertion hole 33: vertical extension axis
34: Fixed rim 35: Number of joints
4a, 4b, 4c: Swivel 5a, 5b: Multi-swivel
6: Hydraulic device 61,62: Cylinder and piston rod
7a, 7b, 7c: connection rods 8a, 8b, 8c:
8a-1, 8b-1: Lower excavation rod 8c-1: Hammer drill rod
81: screw blade 82: incision groove
83: discharge port 84: auger head
85: hammer drill bit

Claims (4)

An auger drive unit installed to vertically move upward and downward along a leader vertically fixed on a ground or water surface; and an auger drive unit which is positioned below the auger drive unit and receives rotational power from the auger drive unit A plurality of rotation shafts provided so as to be rotatably protruded to the lower side of the gear box, a plurality of connection rods connected to the plurality of rotation shafts in a vertical multi-stage connection, and a plurality of connection rods And a plurality of excavating rods connected to a lower end of each of the rods,
The at least one rotary shaft of the plurality of rotary shafts is slidably inserted into a slide insertion hole formed at the center of a shaft receiving portion rotatably installed in the gear box so as to receive rotational power from the auger drive unit One or more lifting and lowering shafts installed to rotate together with the shaft receiving portion;
A vertically extending portion formed vertically upward from an upper end of the lifting / lowering shaft;
A cylinder fixedly installed on the upper surface of the gear box and a piston connected to the fixed end of the cylinder so as to protrude and retract from the upper end of the cylinder so as to surround the upper end of the vertical extension, A hydraulic device configured to be able to move upward and downward at a predetermined interval even in a state in which the elevating rotary shaft is rotating;
And an automatic lifting / lowering function of the excavating rod.
The method according to claim 1,
The outer surface of the lifting / lowering shaft inserted into the slide insertion hole of the shaft receiving portion is slidably mounted on the slide insertion hole with an upper and a lower slide. The slide insertion hole is formed in the center of the shaft receiving portion rotatably mounted on the gear box. Wherein the crusher has a hexagonal cross section so that the crusher can be moved while being rotatable with respect to the crusher and receives rotational force from the crusher to rotate as the crusher.
The method according to claim 1,
Wherein the vertical extension is formed to have a smaller diameter than a hexagonal section of the elevation rotary shaft and is connected to the lower end of the elevation rotary shaft in a vertical direction to perform a digging operation, And a hammer drill rod having a drill bit formed thereon is connected to the lower end of the excavation rod, and an auger head for excavating a ground layer is connected to the hammer drill rod.
The method according to claim 1,
The plurality of excavation rods can be conveyed upwardly toward the spiral direction of the screw vane while mixing the cement paste and the finely crushed gravel to the screw vanes formed on the outer periphery of the plurality of excavation rods by the stirring operation without conveying them Wherein the slitting grooves are formed at predetermined intervals so that the slope grooves are spaced apart from each other.

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