JP4608357B2 - Processing material supply management method and management apparatus in medium digging excavation method - Google Patents

Description

  The invention of the present application is to pre-dig with an earth auger inserted into a ready-made hollow pile such as a steel pipe pile or a concrete hollow pile, and temporarily store the excavated sediment in the discharge hopper while pressing the hollow pile. The present invention relates to a management method for controlling the above-mentioned treatment material supply to an appropriate amount in a treatment material supply type medium digging excavation method in which a treatment material is supplied to the mud-like excavation soil to form solid soil.

  Conventionally, the upper end of an auger screw that is rotatably inserted into a hollow pile is connected to the output shaft of a rotary drive unit that is supported by the mast so as to be movable up and down, and is opened and closed between the rotary drive unit and the hollow pile. 2. Description of the Related Art An intermediate excavator with a discharge hopper provided with a discharge hopper with a type discharge port is known. However, when hollow piles are built using this, the excavated sediment stored in the soil hopper is mud, so the soil hopper is opened and the soil is immediately put into the dump truck. Cannot be carried out.

Therefore, a device for supplying a treatment material such as a cement-based solidification material is provided in the soil discharge hopper, so that the muddy soil at the time of storage can be solidified by the treatment material in the hopper and immediately taken out of the field. An improved machine was proposed. However, the nature of the mud excavated soil that is received in the earth discharge hopper is such that the moisture content changes greatly depending on the ground conditions. Based on this, a method of increasing or decreasing the supply amount of the processing material by the nominal amount is employed. However, such a method has a drawback in that the processing material is excessively supplied or insufficiently supplied.
JP2004-3308

  It is an object of the present invention to supply an appropriate amount of processing material according to the amount of moisture in the mud excavated earth and sand, and to eliminate excessive supply or supply shortage of processing material.

As means for solving the above problems, the first invention of the present application is:
A mud excavated sediment transported upward in the hollow pile is put into a discharge hopper communicated with the upper end of the hollow pile and temporarily stored, and a treatment material for converting the mud excavated sediment into a solid soil is provided. In the processing material supply method in the hollow pile digging excavation method , supplying to the mud excavation earth and sand in the discharge hopper or in the upper end portion of the hollow pile ,
Detecting the amount and weight of mud excavated earth and sand that are put into the earth discharge hopper per unit time, and the amount of water,
Based on the detection data, supplying the mud excavated sediment with an amount of processing material necessary for converting the mud excavated sediment in the discharge hopper into solid soil,
Proposed processing material supply management method in medium digging excavation method,

The second invention of the present application is
The rotation driving unit which is vertically movably supported on the mast, connect the upper end of the rotatably inserted through the auger screw in the hollow pile, by the rotation of the auger screw, muddy drilling with press-fitting the hollow pile while excavation In an excavator with a discharge hopper that transports earth and sand upward in a hollow pile and puts it into a discharge hopper with an openable discharge port communicated with the upper end of the hollow pile.
Disposing a treatment material supply device for supplying a treatment material for converting the mud excavation sediment into solid sediment into the mud excavation sediment in the discharge hopper or the upper end of the hollow pile ,
The respective detectors for detecting the amount and weight of mud excavated earth and sand to be put into the earth discharge hopper within a unit time and the moisture content of the excavated earth and sand are arranged at appropriate positions,
An arithmetic circuit that calculates the required amount of the processing material based on the data obtained by each of the detectors is provided, and the processing circuit supplies the processing material supply amount of the processing material supply device to the calculation required amount by the arithmetic circuit, thereby forming a mud To supply the excavated soil,
Proposal of processing material supply management device for the earth discharge hopper of the medium digging machine,

Furthermore, the third invention of the present application
A mud excavated sediment transported upward in the hollow pile is put into a discharge hopper communicated with the upper end of the hollow pile and temporarily stored, and a treatment material for converting the mud excavated sediment into a solid soil is provided. In the processing material supply method in the hollow pile digging excavation method , supplying to the mud excavation earth and sand in the discharge hopper or in the upper end portion of the hollow pile ,
With regard to the ground, the amount of processing material required to solidify the soil in the bored soil columnar chart and each soil columnar section made in advance is known by experiment, or at each excavation depth in the construction data performed in the past. Knowing the soil condition and the amount of treatment material supplied to it,
As the hollow piles are sequentially press-fitted , based on any of the above knowledge, an amount of treatment material necessary for the soil condition at each depth is supplied to the mud excavated sediment.
A treatment material supply management method for medium digging is proposed.

  According to the first invention of the present application, the property such as the moisture content of the excavated soil put into the discharge hopper is detected, and based on the detected property, the mud excavated sediment in the hopper has an amount necessary for the solid sedimentation. Thus, it becomes possible to supply the treatment material, thereby eliminating the conventional excessive supply or supply shortage of the treatment material.

  According to the second invention of the present application, the processing material management method of the first invention can be effectively implemented.

According to third aspect of the present invention, for the soil, and soil conditions of each obtained that depth by boring soil histogram made in advance, the required amount of knowledge of the process material to each soil conditions obtained by the experiments, or past Based on either knowledge of the soil condition at each depth in the construction data carried out in the construction data and the knowledge of the amount of treatment material supplied to each soil condition, it is put into the soil hopper according to the press-fitting of the hollow pile Therefore, it is possible to supply a necessary amount of the processing material to the excavated sediment at each depth, thereby eliminating the conventional excessive supply or shortage of the processing material.

  The “treatment material” in the present invention includes a cement-based solidified material, a lime-based solidified material, a cement / lime composite-based solidified material, various water-absorbing materials, a mixed material of these and an agglomerated material, and various other treated materials. In addition, those that can be processed into solid, sandy, granular, lump, or gel-like soil that can be easily carried out of the muddy earth and sand immediately are used.

  In the first and second inventions of the present application, it is not easy to directly detect the “amount and weight of the mud excavated earth and sand that are put into the discharge hopper per unit time”. Therefore, in the implementation, the auger screw excavation speed (the amount of excavated sediment by the auger screw per unit time), the rotation speed of the auger screw (the amount of transported sediment by the auger screw per unit time), and the weight change of the soil hopper (unit time) The method of estimating indirectly based on the weight of the earth and sand in the hit hopper is preferable.

For convenience, an apparatus used in the method of the first invention of the present application will be described in detail.
Embodiment of the Second Invention In FIGS. 1 (a) and 1 (b), a mast (2) is vertically supported on the front end portion of a base machine (1), and the guide is laid over the entire length in the longitudinal direction of the mast (2). On the rails (3) and (3), a rotary drive unit (4) comprising a motor (6) and a reduction gear (7) mounted on a holder (5) is supported slidably up and down, and a top sheave block ( 8) A wire rope (9) suspended from the wire rope (9) is suspended up and down, and a box-shaped earth discharging hopper (10) having a rectangular cross section is connected to the lower end of the holder (5) of the drive unit. At the lower end, the upper end of a hollow ready-made pile (12) through which the auger screw (11) is inserted is detachably connected and supported.

  As shown in FIGS. 1 (b) and 2, the earth discharge hopper (10) opens a discharge port (13) at the lower end portion of the front surface thereof, and the hopper bottom plate descends continuously to the discharge port (13). The lid (15) that is formed on the inclined bottom plate (14) and that opens and closes the discharge port (13) has arms (16), (16) extending from the left and right ends of the loosely curved lid body (15 ′). ) On the left and right side surfaces of the hopper (10), and pivotally supported by pins (17) and (17), and a lid opening / closing hydraulic cylinder (one end supported on the front surface of the hopper (10)). 18) The piston rod (19) tip of 18) is connected to the lid body (15 '), and the lid (15) swings around the pins (17) and (17) by the expansion and contraction drive of the cylinder (18). The discharge port (13) is opened and closed.

  At the center of the hopper (10), as shown in FIG. 2, an earth-and-sand guide tube (20) made of a cylinder having substantially the same inner diameter as the hollow pile (12) and open at both ends passes through the inclined bottom plate (14). The upper end of the opening is vertically fixed in a state protruding from the upper part in the hopper (10), and an annular pile mounting cap (21) is concentrically fixed to the lower lower end of the hopper of the earth and sand guide tube (20). The upper end of the preformed hollow pile (12) is detachably connected to the cap (21).

  The auger screw (11) is provided with a screw blade (22) at the entire length of the rod and an excavation head (23) at the lower end of the rod, and the upper end portion thereof from the hollow pile (12) as shown in FIG. It is inserted into the earth and sand guide tube (20), and the upper end of the screw rod passes through the upper plate of the hopper (10) and is connected to the output shaft (24) of the rotation drive unit (4).

  On the upper plate of the hopper (10), four stirring drive geared motors (25) are installed as a stirring device at a position surrounding the auger screw (11), and their output shafts are connected to the hopper (10 ) And the upper ends of stirring rods (26), which are formed by protruding stirring blades (27) on the outer periphery of the rod, for example, are connected to the output shafts. Each stirring rod (26) is suspended in the space between the inner surface of the hopper (10) and the earth and sand guide tube (20).

  As a processing material supply device for excavated earth and sand, in this example, as shown in FIG. 2, a pair of screw casings (28) and (28) in which a screw conveyor is installed are horizontally arranged at the lower part in the discharge hopper (10). Then, the casing (28), (28) front end extrusion port (29), (29) is connected to the peripheral wall of the earth and sand guide tube (20), and the casing (28), (28) rear end portion is discharged. Sprockets (31), (31) projecting out of the soil hopper (10) and fixed to the rear ends of the screw rods (30), (30) are mounted on the lower surface of the soil hopper (10). The rotation is transmitted from the speed motors (32), (32) through the sprockets (33), (33) and the chains (34), (34), and the rear ends of the casings (28), (28) Established on the top In this example, solidifying material hoppers (37) and (37) containing solidifying material powders (36) and (36) are connected to the inlets (35) and (35), and the hoppers (37) and (37) are connected. The solidifying material powder naturally falls into the rear end portions of the screw casings (28) and (28).

  In the medium digging excavator with a soil hopper having the above structure, the wire rope (38) having one end connected to the holder (5) of the driving unit (4) is connected to the mast as shown in FIGS. (2) Guided downward through a guide pulley (39) attached to the upper end, and connected the other end to the excavation speed and depth meter (40) installed in the base machine (1), thereby accompanying the excavation The descent speed of the drive unit (4), that is, the excavation speed and the press-in depth of the hollow pile are detected.

  Further, as shown in FIG. 2, a tachometer (41) is attached to the output shaft (24) of the drive unit (4), and the rotation speed of the output shaft (24) by the tachometer (41), that is, the auger screw (11). ) Is detected.

  Further, as shown in FIG. 1 (a), a wire rope that suspends the drive unit (4), the earth discharging hopper (10), the auger screw (11) and the entire hollow pile (12) on the top sheave (8). A tension meter (42) for detecting the tension of (9) is attached.

  Further, as shown in FIG. 2, a small window (43) is formed at a position below the extrusion ports (29), (29) of the screw casings (28), (28) on the peripheral wall of the earth and sand guide tube (20). Is opened, and a moisture detector (44) is attached to the outer side of the small window (43), so that the muddy earth and sand conveyed upward in the sediment guide tube (20) is detected from the small window (43). The total amount (44) is received and the amount of water is detected.

  For determining the solidification material supply amount of the solidification material supply device by comprehensively calculating the detected values of the excavation speedometer (40), the tachometer (41), the tension meter (42) and the moisture meter (44). An arithmetic circuit (45) is provided (see FIG. 3).

A processing material supply management method using the apparatus of the first embodiment of the first invention will be described. When the drive unit (4) is started, the auger screw (11) is rotated via the output shaft (24), and the ground is dug by the excavation head (23) at the lower end thereof, and is hollowed into the borehole. The pile (12) is press-fitted. At the same time, the excavated soil is conveyed upward in the hollow pile (12) by the screw blades (22) of the auger screw (11). The transported mud excavated sediment is further fed into the soil discharge hopper (10) from the upper end of the opening through the sediment guide tube (20).

  When the excavation speedometer (40), the tachometer (41), the tension meter (42), and the moisture meter (44) are put into an operating state together with the excavation, press-fitting, and transporting operations, the above-mentioned respective speedometers (40), tachometers (42), and moisture meters (44) are operated as shown in FIG. The detection value signals of the detectors (40), (41), (42), (44) are sent to the arithmetic circuit (45), where the detection value of the digging speed meter (40) is the auger screw (per unit time) 11), the detection value of the tachometer (41) is the amount of sediment transported upward by the auger screw (11) per unit time, and the detection value of the tensiometer (42) is its value. Subtract the weight of the drive unit (4), the earth discharge hopper (10), the auger screw (11), the hollow pile (12), etc., and calculate the weight of the earth and sand in the earth discharge hopper (10), respectively. Overall soil hopper (10) The amount and weight of the mud excavated sediment per unit time that is input to the soil is calculated, and the entire mud excavated sediment that is input into the soil discharge hopper (10) based on the detected value of the moisture detector (44) Next, based on this calculated value, the amount of the solidified powder required per unit time is calculated, and the signal of the necessary calculated amount of the solidified material is sent to the variable speed motor (32 ) And the motor (32) is shifted to a rotational speed at which the required calculated amount of the solidified material can be supplied.

  Thus, the muddy earth and sand in the discharge hopper (10) is reformed into a granular solid earth and sand by supplying the solidifying material.

  When the stake of the unit-length pile is finished and the hopper (10) is lowered near the ground surface, the dump truck is moved and the lid (15) is opened by the reduction driving of the lid opening / closing cylinder (18). It is dropped directly from the outlet (13) onto the loading platform and carried out of the field. In some cases, the solid-treated earth and sand are discharged from the earth discharge hopper (10) to a temporary storage place, and then loaded onto a dump truck and carried out. After the dropping, the lid (15) is closed and the excavation process and the solid processing process are restarted.

Embodiment of the Third Invention First, a soil columnar diagram is created in advance by boring for the ground on which a hollow pile is to be built. As an example, soil columnar sections at a depth of 5 cm, and the soil condition of each section, that is, clay type fine sand, sandy clay, clay type loam, loam, fine sand type, etc. Record articles such as the size of sand particles and the amount of water content.
Next, the amount per unit weight of the processing material necessary for solidifying the soil of each soil columnar section shown in the soil columnar diagram is confirmed by experiments.

  Each depth thrown into the earth discharging hopper (10) according to the auger screw (11) drilling based on the knowledge about the soil columnar section of the ground and the amount per unit of processing material necessary for the soil of each section as described above The amount of solidification material powder necessary for the drilling sediment at the depth is sequentially supplied to the drilling sediment at the depth, thereby reforming the drilling sediment at each depth to solid soil.

  If the soil condition at each excavation depth and the amount of treatment material supplied to it are recorded in the construction data when the hollow pile excavation method has been performed in the past in the ground, the above borehole soil column diagram The above construction data can be used instead of the experimental results.

(A) It is a side view of the medium digging excavator with the earth discharge hopper by 2nd invention of this application. (B) It is an enlarged view of the earth discharging hopper part in (A). It is the II-II line expanded sectional view of Drawing 1 (b). It is a block diagram of an arithmetic unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Mast 4 Rotation drive part 10 Excavation hopper 11 Auger screw 12 Hollow pile 13 Discharge port 15 Opening and closing lid 28 Screw casing 30 Screw rod 32 Variable speed motor 40 Drilling speed and depth meter 41 Tachometer 42 Tension meter 44 Moisture detector 45 Calculation circuit

Claims (3)

The mud excavated sediment transported upward in the hollow pile is put into a discharge hopper communicated with the upper end of the hollow pile and temporarily stored, and a treatment material for converting the mud excavated sediment into solid soil is provided. In the processing material supply method in the hollow pile digging excavation method , supplying to the mud excavation earth and sand in the discharge hopper or in the upper end portion of the hollow pile ,
Detecting the amount and weight of mud excavated earth and sand that are put into the earth discharge hopper per unit time, and the amount of water,
Based on the detection data, supplying the mud excavated sediment with an amount of processing material necessary for converting the mud excavated sediment in the discharge hopper into solid soil,
Treatment material supply management method in medium digging excavation method. The rotation driving unit which is vertically movably supported on the mast, connect the upper end of the rotatably inserted through the auger screw in the hollow pile, by the rotation of the auger screw, muddy drilling with press-fitting the hollow pile while excavation In an excavator with a discharge hopper that transports earth and sand upward in a hollow pile and puts it into a discharge hopper with an openable discharge port communicated with the upper end of the hollow pile.
Disposing a treatment material supply device for supplying a treatment material for converting the mud excavation sediment into solid sediment into the mud excavation sediment in the discharge hopper or the upper end of the hollow pile ,
The respective detectors for detecting the amount and weight of mud excavated earth and sand to be put into the earth discharge hopper within a unit time and the moisture content of the excavated earth and sand are arranged at appropriate positions,
An arithmetic circuit that calculates the required amount of the processing material based on the data obtained by each of the detectors is provided, and the processing circuit supplies the processing material supply amount of the processing material supply device to the calculation required amount by the arithmetic circuit, thereby forming a mud To supply the excavated soil,
A processing material supply management device for the earth discharge hopper of medium digging machines. A mud excavated sediment transported upward in the hollow pile is put into a discharge hopper communicated with the upper end of the hollow pile and temporarily stored, and a treatment material for converting the mud excavated sediment into a solid soil is provided. In the processing material supply method in the hollow pile digging excavation method , supplying to the mud excavation earth and sand in the discharge hopper or in the upper end portion of the hollow pile ,
With regard to the ground, the amount of processing material required to solidify the soil in the bored soil columnar chart and each soil columnar section made in advance is known by experiment, or at each excavation depth in the construction data performed in the past. Knowing the soil condition and the amount of treatment material supplied to it,
As the hollow piles are sequentially press-fitted , based on any of the above knowledge, an amount of treatment material necessary for the soil condition at each depth is supplied to the mud excavated sediment.
Treatment material supply management method in medium digging excavation method.

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