JP2877297B2 - All casing drilling equipment and construction method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an all-casing excavating apparatus and method for simultaneously inserting a casing tube underground and excavating / discharging an internal ground. [0002] In the conventional all-casing method, a casing tube for preventing collapse of a hole wall is inserted into the ground, and the inside is excavated by a hammer club or a rotary bucket.
It is something to be excavated. Although various mechanisms have been proposed as the internal digging device, a so-called rotary digging device generally has its own rotary drive device as power. [0003] The above-mentioned conventional casing tube internal excavating apparatus has the following problems. (1) Impact-type excavating and unloading equipment represented by Hama-Grab is easy to handle because it can be operated with a single wire rope, but has high noise and vibration, reduces efficiency in underwater excavation, and excavates on hard ground.・ There is a problem such as a decrease in the amount of grip. (2) Rotary drilling, represented by earth drill buckets
The earth removal device is excavated with the cutter at the lower end, so low noise and low noise
Although it has low vibration, it requires a rotary drive device for it, which is very large, including related devices. In addition, when the rotating device is inserted into the hole, there is a problem in that the supply of power to a gripper for temporarily fixing the device and the rotation driving device and the handling of hoses and cables thereof are complicated. (3) As a method for excavating the inside of the casing tube, for example, as described in Japanese Patent Application Laid-Open No. 62-17292, "Large-Diameter Vertical Drilling Method and Apparatus", a protrusion is attached to the inner wall of the casing tube, and It is also known to have a projection that engages with this, but in this type of device, the projection on the casing tube interferes with the insertion of the rebar cage in the later process or causes the Was not practical. SUMMARY OF THE INVENTION The present invention comprises a full swing boring machine for rotating and pushing a casing tube, and a crane device for suspending a digging device through a wire rope in the casing tube. The digging apparatus includes a digging blade provided in front of the digging apparatus main body, a wire rope hanging portion provided in the back of the digging apparatus main body, and a gripper opening / closing provided in the middle of the digging apparatus main body. A gripper opening / closing mechanism, which presses the inner surface of the casing tube to apply a tension applied to the wire rope to the gripper integrated with the casing tube, and contracts in a radial direction to release the pressing; When the tension applied to the rope is unloaded, it is formed so as to be switchable between an open state in which the rope expands in the radial direction and starts pressing, and the inside digging device lands. The opening / closing mechanism is fixed to the inner surface of the lower end portion of the casing tube via the gripper that has been expanded in the radial direction of the inner digging device by the unloading of the tension applied to the wire rope, It is characterized in that the inside of the casing tube is excavated and the earth is discharged by a digging device in accordance with the rotation and the pushing of the casing tube. [0005] The present invention also provides a casing tube which is provided with rotation and pushing by a full swing boring machine.
The gripper that presses the inner surface of the casing tube when the tension applied to the hanging wire rope of the crane is applied is reduced in a radial direction to release the gripper, and the gripper that presses the inner surface of the casing tube when the tension applied to the wire rope is removed. A digging device having a gripper opening / closing mechanism for extending and fixing the digging device in the radial direction is inserted through the wire rope, and the tension applied to the wire rope is released by the digging device being landed and the load is removed. The opening / closing mechanism is fixed to the inner peripheral surface of the lower end of the casing tube via the gripper which is extended in the radial direction of the inner digging device main body, and the inner digging device is rotated in accordance with the rotation and pushing of the casing tube. The apparatus is characterized in that excavation and discharge of the inside of the casing tube are performed by the device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, 1 is a full-turn boring machine, 2 is a crawler crane, 3 is a boring machine,
4 is a casing tube, 5 is a gripper, and 13 is a wire rope. The all-turn boring machine 1 has a function of rotating and pushing the casing tube 4 into the ground, and the crawler crane 2 has a function of suspending the digging device 3 into the casing tube 4. When the digging device 3 reaches the lower end of the casing tube 4, the gripper 5 expands and presses the inner surface of the casing tube 4, and the digging device 3 is integrated with the casing tube 4, and the rotational force of the full turning boring machine 1 Excavates the ground by pushing force. The earth and sand is taken into a bucket (not shown) in the inside digging device 3, and when the pie becomes full, the gripper 5 is loosened to separate the inside digging device 3 from the casing tube 4, and the inside digging device 3 is pitted by the crane 2. Take it out and discharge it on the ground. The digging device 3 can be operated only by suspension with the wire rope 13. The opening and closing of the gripper 5 is performed by means of the weight of the digging device itself or a spring or the like without supplying power from the other. As such a digging device 3, for example, Japanese Patent Application No. 62-188990 ( Japanese Patent Application Laid- Open No. 64-3339) previously filed by the present applicant.
No. 3 ) can be used. The outline of the digging device 3 will be described with reference to FIG. In FIG. 2, 4 is a casing tube, 5 is a gripper, 6 is a bucket drum, 7 is a gripper jack,
8 is a pump jack, 9 is an outer cylinder, 10 is an inner cylinder, 11 is a weight, 12 is a swivel joint, 13 is a wire rope, and 14 is a cutter. The gripper jack 7, pump jack 8, outer cylinder 9, and inner cylinder The configuration including the opening 10 and the weight 11 corresponds to a specific example of the opening and closing mechanism of the present invention, and the configuration of the digging apparatus except for the opening and closing mechanism and the gripper 5 is a specific example of the main body of the digging apparatus. An outer cylinder 9 is fixed to an upper portion of a bucket drum 6 having a cutter 14 disposed at a lower end, and a gripper jack 7 and a gripper 5 are radially connected to an outer periphery of the outer cylinder 9. A weight 11 is placed above the inner cylinder 10 inserted into the outer cylinder 9.
The upper end of the inner cylinder 10 is further connected to a wire rope 13 via a swivel joint 12. The pump jack 8 has a cylinder lower end supported by the inner cylinder 10 and a piston rod lower end supported by the outer cylinder 9. Next, the operation will be described. A boring device is suspended from a wire rope in a casing tube. When the drilling device reaches the bottom of the pit, the tension of the wire rope is unloaded and the opening and closing mechanism is extended in the radial direction of the drilling device body, and the gripper provided at the tip presses the inner surface of the casing tube. Then the boring device is fixed to the casing tube. In this state, the casing tube is rotated by the all-spinning boring machine, so that the boring apparatus is also integrally rotated to perform excavation and earth removal. After the excavation work is completed, the wire rope is lifted upward to apply tension, whereby the opening / closing mechanism is closed, the gripper is released, and the middle digging device can be easily pulled up. [0011] Therefore, only by operating the wire rope, the lowering, fixing, releasing and ascent of the digging device can be extremely easily performed, and the operability is good. According to the above-mentioned apparatus, the digging apparatus suspended in the casing tube via the wire rope of the crane by the above-mentioned apparatus only operates the wire rope for suspending the apparatus.
Since the gripper that expands and contracts in the casing tube in the radial direction is engaged and disengaged in the casing tube, the casing tube does not require a protrusion for engaging and disengaging the gripper, so that it is possible to smoothly insert the boring device into the casing tube. As a result, the excavating ability can be improved by engaging the casing tube in the rotating direction and the pushing direction.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevational view showing an embodiment of an all-casing excavator of the present invention. FIG. 2 is a detailed view of the inside digging device in FIG. 1; [Explanation of Signs] 1 Full-turn boring machine 2 Crawler crane 3 Inside digging device 4 Casing tube 5 Gripper

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-62-17292 (JP, A) JP-A-57-147386 (JP, U) JP-A-44-13638 (JP, Y1) (58) Field (Int.Cl. ⁶ , DB name) E21B 11/00 E21B 4/18 E21B 7/20

Claims (1)

(57) [Claims] A full boring machine for rotating and pushing the casing tube; and a crane device for suspending the digging device via a wire rope in the casing tube, wherein the digging device is provided in front of the digging device body. A drilling blade, a wire rope hanging portion provided behind the boring body, and a gripper opening / closing mechanism provided in the middle of the boring body, wherein the gripper opening / closing mechanism is an inner surface of the casing tube. When the tension is applied to the wire rope by applying pressure to the gripper, the gripper is contracted in the radial direction when the tension is applied to the wire rope, and the gripper is released in the closed state. It is formed so as to be switchable between an open state in which stretching and pressing are started, and the tension applied to the wire rope is released by the digging device landing and the load is released. The opening / closing mechanism is fixed to the inner surface of the lower end portion of the casing tube via a gripper whose radial direction is extended in the direction of the inner digging device main body. An all-casing excavator, which excavates and discharges the inside of a tube. 2. When the tension applied to the hanging wire rope of the crane is applied to the casing tube that is given rotation and pushing by the full swing boring machine, the gripper that presses the inner surface of the casing tube is radially reduced and released,
When the tension applied to the wire rope is unloaded, a boring device having a gripper opening / closing mechanism that radially expands and fixes a gripper that presses the inner surface of the casing tube is inserted through the wire rope. The digging device lands and the opening and closing mechanism is unloaded by the tension applied to the wire rope. An all-casing excavation method, wherein the inner casing is fixed to an inner peripheral surface, and the inside of the casing tube is excavated and discharged by a middle excavator in accordance with rotation and pushing of the casing tube.