KR20010088133A - Non-destructive two-dimensional system for investigating the ground - Google Patents

Abstract

PURPOSE: A space continuity non-constructive ground investigating system is provided to efficiently and promptly perform a ground investigation work by easily moving an oscillating apparatus and an isolating apparatus, and improve the reliability of data by sensing elastic acoustic waves at several places. CONSTITUTION: A space continuity non-constructive ground investigating system includes a tripod(20) setting a hit position of the ground, a hitting element(42) installed at the tripod and hitting the ground for generating elastic acoustic waves, a winding machine(50) winding the hitting element, a sensor mounted at a movable truck for sensing the elastic acoustic waves generated by a hit of the hitting element, a pressing element contacting the sensor to the ground with a predetermined force, and a guide element guiding the lifting of the sensor.

Description

NON-DESTRUCTIVE TWO-DIMENSIONAL SYSTEM FOR INVESTIGATING THE GROUND

The present invention relates to a spatial continuous non-destructive ground irradiation system for generating the elastic wave by hitting the ground by the sensing device for the spatial continuous non-destructive ground irradiation and the sensing device to detect the elastic wave transmitted through the ground.

Geotechnical investigations to investigate the engineering properties and the stratification of the soil are carried out in various ways. Currently, the most common ground surveys are drilling methods and sampling methods. The ground survey through drilling has the advantage of being most certain, but it has the disadvantage that it takes considerable cost and time to install the borehole. In addition, since the ground investigation by drilling is carried out only by limited places, the entire site cannot be represented.

In recent years, the technology for securing the ground survey by drilling and efficient space continuous non-destructive ground survey in economic and time aspects has been developed. The space continuous non-destructive ground irradiation system requires an oscillation device for generating a seismic wave, and a damping device for sensing the seismic wave. However, oscillators and dampers have not been developed that can efficiently and quickly perform spatial continuous non-destructive ground investigation.

The present invention is to solve the problems of the prior art as described above, an object of the present invention is to provide a spatial continuous non-destructive ground survey system capable of performing the ground survey work efficiently and quickly.

Another object of the present invention is to provide a spatial continuous non-destructive ground survey system capable of detecting the seismic wave at several places from the point of generation to improve the reliability of the data.

A feature of the present invention for achieving the above object is a space continuous non-destructive ground irradiation system for detecting and generating elastic waves for space continuous non-destructive ground irradiation, tripod that can set the ground hitting position; Strike means provided on a tripod to strike the ground to generate an acoustic wave; A hoisting machine for hoisting the striking means; A sensor provided in the trolley free to move so as to sense a seismic wave generated by the striking means; Pressing means for bringing the sensor into contact with the ground with a predetermined force; A space continuous non-destructive ground surveying system comprising guide means for guiding the lifting and lowering of a sensor.

1 is a perspective view showing an oscillation apparatus of a space continuous non-destructive ground inspection system according to the present invention,

2 is a front view showing the tripod and the striking means of the oscillation apparatus according to the present invention,

Figure 3 is a perspective view showing a sensing device of the spatial continuous non-destructive ground inspection system according to the present invention,

4 is a side view showing the sensing device of FIG.

5 is a perspective view showing the sensor and the clamping unit separately from the sensing device according to the present invention;

6 is a cross-sectional view illustrating a state in which a sensor is clamped by the clamping unit of FIG. 5;

7 is a side view showing an example of a state in which a plurality of sensing devices are connected in the space continuous non-destructive ground survey system according to the present invention,

8 is a cross-sectional view showing the coupling means of the sensing device according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

10: oscillator 20: tripod

22: mainpost 24: subpost

30: Fixture 38: Pulley Set

40: rope 50: winch

52: Balance 58: Kwon Dong

62: motor 66: clutch

80: damping device 82: bogie

88: fixed plate 90: air cylinder

94: platform 96: guide bar

100: compressed air supply unit 102: tank

104: air conditioning controller 120: sensor

130: clamping unit 150: coupler

Hereinafter, a preferred embodiment of the spatial continuous non-destructive ground survey system according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 8 are diagrams for explaining the spatial continuous non-destructive ground survey system according to the present invention.

First, referring to Figures 1 and 2, in the space continuous non-destructive ground inspection system of the present invention, the oscillation apparatus 10 for generating the elastic wave by hitting the ground is provided with a tripod 20 to set the impact position. Tripod 20 is composed of three hollow main posts 22 arranged at the bottom and three auxiliary posts 24 inserted into the main posts 22 so as to be stretchable in the longitudinal direction. . The bolts 26 are fastened through the upper ends of the main posts 22 and the lower ends of the subposts 24, so that the auxiliary posts 24 are firmly fixed to the main posts 22. A fixing plate 28 is attached to the lower ends of the main posts 22, and three fixing brackets 30 are connected to the fixing plate 28 by fastening the bolts 32 to maintain a balance of three-point support by the tripod 20. do. And, the lower surface of the fixed plate 28 is mounted with a wheel 34 to free the movement of the tripod (20).

The upper end of the auxiliary post 24 is arranged in a triangle to the pulley set 38 so as to rotate about the hinge 36, and the rope 40 wound around the pulley 38a of the pulley set 38 At one end, the hook 42a of the disc-shaped weight 42 is struck by the striking means. The other end of the rope 40 has a first guide pulley set 44 mounted on the top of one of the auxiliary posts 24 and a second guide pulley mounted on the bottom of one of the main posts 22, respectively. Guided by set 46.

As shown in FIG. 1, the oscillation apparatus 10 of this invention is equipped with the winding machine 50 which winds the other end of the rope 42. As shown in FIG. The trolley 52 of the winch 50 can be moved freely by the wheel 56 mounted on the lower surface of the frame 54 provided with the handle 54a, the rope 40 on the upper surface of the trolley 52 Winding roll 58 winding the other end of the is installed to rotate. On one side of the winding 58, a guide roller 60 for guiding the conveyance of the rope 40 passing through the second guide pulley set 46 to the winding 58 is provided, and the winding 58 is formed of the motor 62. It is operatively connected to the drive shaft 64, and the winding 58 and the drive shaft 64 are interrupted by the clutch 66.

When the winding 58 is rotated and the rope 40 is wound by the drive of such a motor 62, the weight 42 is raised from the ground. When the driving shaft 64 of the motor 58 and the drive shaft 64 are disconnected by the operation of the clutch 66 in the raised state of the weight 42, the weight 42 falls by its own weight and at the same time Since the rope 40 is freely released due to the rotation, the weight 42 strikes the ground.

In addition, a control unit 70 for controlling the driving of the clutch 66 and the motor 62 is mounted at a position adjacent to the motor 62, and the control unit 70 has a control console 72 having a predetermined length. Is connected by a cable 76. Since the operator can control the driving of the clutch 66 and the motor 62 by the operation of the control console 72, the worker can safely work from a point of impact.

3 and 4, the spatial continuous non-destructive ground irradiation system of the present invention includes a damping device 80 for measuring the elastic waves generated from the ground by the impact of the oscillation device 10. The trolley | bogie 82 of the damping device 80 can be moved freely by the wheel 86 mounted in the lower surface of the frame 84, and the fixed plate 88 is provided in the upper surface of the trolley | bogie 82. Through-holes 88a are formed in the center of the fixing plate 88, and two guide holes 88b are formed in each of the through-holes 88a.

The rod 92 of the air cylinder 90 penetrates vertically through the through-hole 88a of the fixing plate 88 by pressing means, and a lift table 94 is mounted at the lower end of the rod 92. The guide bar 96 is vertically installed in the guide hole 88b of the fixing plate 88, and the lower end of the guide bar 96 is fixed to the upper surface of the lifting table 94. A bush 98 for assisting the lifting and lowering of the guide bar 96 is mounted on the upper portion of the guide hole 88b of the fixing stand 88, and the bush 98 has a ball having a plurality of balls embedded in the inner surface along the longitudinal direction. It is preferable to use a bush.

In addition, the pressurizing means is provided with a compressed air supply unit 100 for supplying the compressed air required for the operation of the air cylinder (90). The compressed air supply unit 100 includes a tank 102 filled with compressed air, an air conditioner 104 for supplying compressed air from the tank 102 to the air cylinder 90 at a prescribed pressure, and a tank ( It consists of a pressure gauge 106 for measuring the pressure of the 102 and the filling valve 108 provided to fill the tank 102 with compressed air. A handle 102a is formed at the upper end of the outer periphery of the tank 102, and a leg 102b supporting the tank 102 is formed at the lower end of the outer periphery. The air conditioning controller 104 and the air cylinder 90 of the compressed air supply unit 100 are connected by an air line composed of a general air hose, and the filling valve 108 is connected to a general air compressor to provide a compressed air tank ( 102). The tank 102 is detachably mounted to the pedestal 110 mounted on the frame 84 of the trolley 82, and the legs 102b of the tank 102 are supported by the locking mechanism 112 by locking. 110). In the sensing device 80 of the present invention, the air cylinder 90 may use a hydraulic cylinder operated by a hydraulic supply unit.

4 to 6, a sensor 120, which is in contact with the ground and detects an elastic wave, is installed on one side of the platform 94 by clamping of the clamping unit 130. The sensor 120 is composed of a cylindrical body 122 and a small diameter portion 124 extending in the center of the upper surface of the body 122.

The clamping unit 130 includes a first fixing block 132 and a second fixing block 134 that are fixed above and below one side of the platform 94. A semicircular cutout 132b having a support jaw 132a supporting an upper surface of the body 122 of the sensor 120 is formed on the outside of the first fixing block 132, and the outside of the second fixing block 134. The semi-circular support part 134a supporting the outer surface of the body 122 of the sensor 120 is formed. A pair of first guide bars penetrates through holes 132c and 134b formed in both the cutout 132b of the first fixed block 132 and the support 134a of the second fixed block 134, respectively. The 136 and the second guide bar 138 are fixed to the platform 94 in parallel with each other, and the ends of the first and second guide bars 136 and 138 are formed with screws 136a and 138a, respectively.

In addition, the clamping unit 130 includes a first movable block 140 and a second fixing block 142 for clamping the sensor 120 in cooperation with the first and second fixing blocks 132 and 134. The first movable block 140 facing the first fixing block 132 has a support jaw 140a supporting the upper surface of the body 122 of the sensor 120 like the first fixing block 132. A semicircular cutout 140b is formed. The semi-circular support part 140a supports the outer surface of the body 122 of the sensor 120 in the same manner as the second fixed block 134 on the inner side of the second movable block 142 facing the second fixed block 134. Is formed. In addition, holes 140c and 142b are formed in the first and second movable blocks 140 and 142 so as to move along the first and second guide bars 136 and 138. The first and second movable blocks 132 and 134 are fixed to the first and second fixed blocks by the fastening force of the nut 144 fastened to the screws 136a and 138a of the first and second guide bars 136 and 138. The sensor 120 is clamped in cooperation with 132 and 134. Between the first and second movable blocks 140 and 142 and the nut 144, a pressing plate 146b for reinforcing the fastening force of the nut 144 is interposed therebetween.

In the clamping unit 130 having such a configuration, the support jaw 132a of the first fixing block 132 and the support jaw 140a of the first movable block 140 of the body 122 of the sensor 120. The first and second guide bars 136 to support the upper surface, and to support the outer surface of the body 122 by the support part 134a of the second fixing block 134 and the support part 142a of the second movable block 142. And nut 144 to screws 136a and 138a of 138. The pressing plate 146 presses the first and second movable blocks 140 and 142 toward the first and second fixing blocks 132 and 134 by tightening the nut 144, and thus the first and second movable blocks 140 and 142. The fixed blocks 132 and 134 and the first and second movable blocks 140 and 142 cooperate to clamp the sensor 120.

As shown in FIG. 7 and FIG. 8, the trolley | bogie 82 of the sensing device 80 is arrange | positioned and couple | connected by the coupler 150 of fixed length. The coupler 150 has a first flange 152 and a screw hole 152a is formed in the center of the first flange 152. The bolt 154 is fastened to the screw hole 152a of the 1st flange 152 through the through-hole 84a formed in the center of each side surface of the frame 84 of the trolley | bogie 82. As shown in FIG. Thus, the first flange 152 of the coupler 150 is detachably assembled to the frame 84 of the bogie 82.

In addition, one end of the flexible shaft 156 is fixedly attached to one side of the first flange 152. Not only can the position of the trolley 82 be adjusted by the flexible shaft 156, but also the transmission of vibration and shock between the trolleys 82 is blocked. One side of the second flange 158 is fixedly attached to the other end of the flexible shaft 156, and one end of the coupling shaft 160 is fixedly attached to the other side of the second flange 158. At the other end of the coupling shaft 160, the first flange 152, the bolt 154, the flexible shaft 156, and the first flange 152 as described above can be detachably assembled to the frame 84 of the trolley 82. Two flanges 158 are provided. By the connection of the coupler 150 of this configuration, several trucks 82 are arranged at regular intervals. Therefore, the damping device 80 of the present invention can detect the elastic waves at various points in the radial direction from the point of occurrence of the elastic waves. When the damping device 80 of the present invention connects a plurality of trucks 82 by the coupler 150, the compressed air supply unit 100 is installed only in one of the trucks 82, and the rest of the trucks 82 are provided. The provided air cylinder 90 and the compressed air supply unit 100 are connected by an air line composed of a general air hose.

The following describes the operation of the spatial continuous non-destructive ground survey system according to the present invention.

1 and 2, and 3 and 4, the operator installs the tripod 20 of the oscillation device 10 in the striking position of the ground, and sets the measuring position of the acoustic wave from the striking position to reduce the damping device ( The trolley | bogie 82 of 80 is arrange | positioned. Then, when the compressed air is supplied from the tank 102 to the air cylinder 90 by operating the air conditioner controller 104 of the compressed air supply unit 100, the rod 92 of the air cylinder 90 is extended to raise the lifting table ( 94 is lowered, and the sensor 120 clamped to the clamping unit 130 is in contact with the ground.

After arranging the oscillation device 10 and the damping device 80 in this manner, the motor 62 of the winch 50 is driven to rotate the drive shaft 64, so that the rotational force of the drive shaft 64 is applied to the clutch 66. The weight 42 is lifted from the ground as it is transmitted to the winding 58, and the rope 40 is wound by the rotation of the winding 58. At this time, the rope 40 is wound around the winding 58 under the guidance of the first and second guide pulley sets 44 and 46 and the guide roller 62. When the weight 42 reaches the predetermined height, the operator stops the driving of the motor 62 and operates the clutch 66 to disconnect the drive shaft 64 and the winding 58. As a result, the winding 58 is in a free rotation state, and the weight 42 falls by its own weight to strike the ground.

Due to the impact of the weight 42, impact energy is applied to the ground to generate an acoustic wave from the ground. The seismic wave is sensed by the sensor 120 of the sensing device 80 in contact with the ground, it is possible to investigate the engineering properties and the layer structure of the ground by analyzing the data obtained by the detection of the sensor 120.

As shown in FIG. 7, the damping device 80 according to the present invention can be connected to the trolley 82 by a coupler 150, so that the seismic wave can be detected at various points from the point where the seismic wave is generated. Can be performed, and the reliability of the data is improved.

On the other hand, the tripod 20, the winch 50, and the damping device 80 of the oscillation device 10 can be towed and moved by the power of manpower and vehicles, so that the irradiation work can be efficiently and quickly performed. Can be. The tripod 20 reduces the overall length by inserting the subpost 24 into the inside of the main post 22, and detaches the holder 30 so that the main post 22 is folded around the hinge 36. And storage becomes easy.

The above embodiments are merely illustrative of preferred embodiments of the present invention, and the scope of the present invention is not limited to the illustrated embodiments, and may be appropriately changed within the scope of the same idea. For example, the shape and structure of each component shown in the embodiment of the present invention can be modified.

As described above, according to the space continuous non-destructive ground investigation system according to the present invention, the oscillation device and the vibration reduction device can be easily moved by the attraction of the manpower and the vehicle, so that the ground investigation work can be performed efficiently and quickly, and the generation of the seismic waves By placing several oscillators at regular intervals from the point, the seismic waves can be detected at several places, thereby improving the reliability of the data.

Claims (6)

Spatial continuous non-destructive ground surveying system that detects and generates elastic waves for spatial continuous non-destructive ground survey, A tripod for setting the hitting position of the ground; A striking means provided on said tripod for striking the ground to generate an elastic wave; A hoisting machine for hoisting said striking means; A sensor provided on a trolley free to move so as to sense an elastic wave generated by the striking means; Pressing means for bringing the sensor into contact with the ground with a predetermined force; And a guide means for guiding the lifting and lowering of the sensor. According to claim 1, The tripod, Hollow main posts disposed below; Auxiliary posts inserted into the main posts to extend and contract in a longitudinal direction; Fasteners connected to lower ends of the main posts to maintain a balance of three-point support; Wheels mounted at lower ends of the main posts; Spaced continuous buffy and ground irradiation system, characterized in that the upper end of the auxiliary posts are arranged in a triangular connection and rotated, the pulley set is wound around the rope. The method of claim 1, wherein the winch A bogie free to move; Kwon-dong is rotated on the upper surface of the bogie to wind the rope; A guide roller for guiding the conveyance of the rope from one side of the winding; A motor having a drive shaft operatively connected to the winding; Space continuous continuous non-destructive ground surveying system comprising a clutch for intermitting the winding and the drive shaft of the motor. The method of claim 1, wherein the guide means, A fixed plate for fixing the air cylinder constituting the pressing means to the trolley; Space-continuous non-destructive ground survey system, characterized in that consisting of a pair of guide bar which is vertically penetrating the fixed plate in accordance with the expansion and contraction of the air cylinder, and fixed to a platform connecting the rod and the sensor of the air cylinder. An oscillating device for spatial continuous non-destructive ground survey that generates elastic waves for spatial continuous non-destructive ground survey, Hollow main posts disposed below, auxiliary posts inserted into the main posts to extend and contract in the longitudinal direction, and upper ends of the auxiliary posts are connected in a triangular manner to be rotated and wound with a rope. A tripod composed of a set of hanging pulleys and free to move; A striking means connected to the rope to strike the ground; A hoist comprising a freely moving trolley, a motor having a drive shaft which is rotated on an upper surface of the bogie to wind the rope, a drive shaft which is operatively connected to the drive shaft, and a clutch that controls the drive shaft and the drive shaft of the motor. Oscillation device for space continuous non-destructive ground investigation comprising a. As a sensing device for spatial continuous non-destructive soil survey for sensing elastic waves for spatial continuous non-destructive soil survey, A bogie free to move; An air cylinder for contacting a sensor for detecting an acoustic wave with a predetermined force with respect to the ground; The fixed plate for fixing the air cylinder to the trolley by guiding the lifting of the sensor and the lifting plate vertically through the fixed plate in accordance with the expansion and contraction of the air cylinder and is fixed to the lifting platform connecting the air cylinder and the sensor. A guide means composed of a pair of guide bars; And a clamping means for clamping the sensor to a platform of the guide means.