A device and method for high-frequency vibration treatment of collapsible loess

Abstract

The invention discloses a device and method for treating collapsible loess by high-frequency co-vibration, comprising a crawler travel system, a working chassis and a hydraulic telescopic amplitude variable system installed on the working chassis, an upright truss, a high-frequency vibration oil hammer, a high-pressure pipeline buried in a drill pipe, a towing wire rope, a winch and towing system, a hydraulic telescopic device for a supporting truss, a telescopic supporting truss, a horizontal hydraulic telescopic device for a soil feeder, a vertical hydraulic telescopic device for a soil feeder, a horizontal fixed truss for a soil feeder, a spiral cutter disc for cutting and feeding soil for a soil feeder and an operation control system. The device and method have the characteristics of simple construction, fast construction speed, good construction effect and low cost.

Description

Technical Field

[0001] The invention belongs to the field of earthwork, and relates to a device and method for treating collapsible loess by high-frequency co-vibration. Background Art

[0002] Collapsible loess is a special type of soil with relatively uniform soil quality, loose structure and well-developed pores. When not soaked in water, it is generally of high strength and low compressibility. When soaked in water under a certain pressure, the soil structure will be rapidly destroyed, resulting in large additional subsidence and rapid decrease in strength. Therefore, in the construction of railway and highway subgrade projects in collapsible loess areas, the importance of line traffic, the possibility of water soaking of the foundation and the strictness of the restrictions on uneven settlement during use should be taken into consideration. The main diseases include overall subsidence, deformation, depression and cracking of the subgrade line, collapse and spalling of the line slopes, and the bottom of the subgrade being easily eroded by water into earth caves and underground rivers. In order to ensure the stability of the roadbed, special reinforcement measures should be taken during construction in collapsible loess areas to reduce or eliminate its collapsibility. Comprehensive measures, mainly based on foundation treatment, should be taken to prevent foundation collapse from causing harm to the line. The purpose of collapsible loess foundation treatment is mainly to improve the bearing capacity of the foundation by eliminating the collapsibility of loess. In addition to measures to prevent surface water infiltration, the following foundation treatment methods are commonly used at home and abroad: soil replacement method, heavy hammer surface compaction, strong compaction method, compaction method + pile-board structure, long and short pile composite foundation treatment, explosive expansion piles, pile foundation, pre-soaking method, chemical reinforcement method and other methods. The treatment methods of various foundations should be adapted to local conditions and reasonably selected after technical comparison. They have disadvantages to varying degrees, such as large workload, high labor cost, large construction site area, long construction period and high cost.

[0003] Therefore, there is an urgent need for a method and device for dealing with collapsible loess with simple construction, fast speed, good effect and low cost. When carrying out construction in collapsible loess areas, emphasis should be placed on comprehensive measures with foundation treatment as the main focus, that is, treating the root cause as the main focus and treating the symptoms as the auxiliary, treating both the symptoms and the root causes, highlighting the key points, eliminating hidden dangers, preventing foundation collapse, ensuring the quality of construction projects and the safe use of buildings (structures), achieving advanced technology, economic rationality, environmental protection, and being able to complete operations with high quality and efficiency. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to provide a device and method for treating collapsible loess by high-frequency vibration. The device and method have the characteristics of simple construction, fast construction speed, good construction effect and low cost.

[0005] To achieve the above-mentioned purpose, the high-frequency co-vibration device for treating collapsible loess of the present invention comprises a crawler-type travel system, a working chassis and a hydraulic telescopic amplitude-changing system installed on the working chassis, an upright truss, a high-frequency vibration oil hammer, a high-pressure pipeline buried in a drill pipe, a towing wire rope, a winch towing system, a hydraulic telescopic device for a supporting truss, a telescopic supporting truss, a horizontal hydraulic telescopic device for a soil feeder, a vertical hydraulic telescopic device for a soil feeder, a horizontal fixed truss for a soil feeder, a spiral cutter disc for cutting and feeding soil for a soil feeder and an operation control system;

[0006] The crawler travel system is located at the bottom of the working chassis, the hydraulic telescopic luffing system is located on the working chassis, the output shaft of the hydraulic telescopic luffing system is connected to the middle of the upright truss, wherein the output shaft of the hydraulic telescopic luffing system is tiltedly distributed, the side of the upright truss is axially provided with an oil hammer limit guide sliding track, the side of the high-frequency vibration oil hammer is slidably connected to the oil hammer limit guide sliding track, the side of the upright truss is provided with a drill rod guide limit device for axially limiting the high-frequency vibration oil hammer, the upper end of the high-pressure pipeline buried in the drill rod is connected to the output shaft at the bottom of the high-frequency vibration oil hammer, the lower end of the high-pressure pipeline buried in the drill rod is provided with a sawtooth cross drill bit, one end of the towing wire rope is connected to the winch towing system, and the other end of the towing wire rope is connected to the high-frequency vibration oil hammer after passing the pulley at the top of the upright truss;

[0007] The upper end of the hydraulic telescopic device of the supporting truss is fixed to the bottom of the upright truss, the lower end of the hydraulic telescopic device of the supporting truss is connected to the side of the telescopic supporting truss, one end of the horizontal hydraulic telescopic device of the earth feeder is connected to the side of the telescopic supporting truss, the other end of the horizontal hydraulic telescopic device of the earth feeder is connected to the upper end of the vertical hydraulic telescopic device of the earth feeder, the horizontal fixed truss of the earth feeder is fixed to the lower end of the vertical hydraulic telescopic device of the earth feeder, and the earth cutting spiral cutter head of the earth feeder is fixed to the bottom of the horizontal fixed truss of the earth feeder;

[0008] The output end of the operation control system is connected to the control end of the crawler travel system, the control end of the hydraulic telescopic amplitude change system, the control end of the high-frequency vibration oil hammer, the control end of the support truss hydraulic telescopic device, the control end of the soil feeder horizontal hydraulic telescopic device, the control end of the soil feeder vertical hydraulic telescopic device and the control end of the soil cutting spiral cutter disc of the soil feeder.

[0009] A plurality of drill pipe buried high pressure pipe nozzles are arranged on the side of the drill pipe buried high pressure pipe, and the outlet of the high pressure gas device and the outlet of the high pressure water device are both connected with the inside of the drill pipe buried high pressure pipe.

[0010] A circular vibration plate with holes is fixed on the bottom of the sawtooth cross drill bit.

[0011] It also includes a power system for driving the winch and towing system and an oil storage tank for providing hydraulic oil.

[0012] The outlet of the high-pressure gas device and the outlet of the high-pressure water device are connected to the interior of the buried high-pressure pipeline in the drill pipe through the high-pressure water and gas pipeline.

[0013] Also included is a high-pressure oil delivery pipe for supplying oil to the high-frequency vibration oil hammer.

[0014] The method for treating collapsible loess by high-frequency vibration of the present invention comprises the following steps:

[0015] 1) The crawler-type driving system is controlled to move to the pile position through the operation control system, and then the hydraulic telescopic luffing system is controlled to make the upright truss stand vertically at a preset distance behind the pile, and the cross drill rod and the sawtooth cross drill bit are in the designed position; then the hydraulic telescopic device of the support truss is controlled to extend, so that the telescopic support truss is fixedly supported on the ground, and then the winch and towing system is controlled to drag the wire rope to make the high-frequency vibration oil hammer and the cross drill rod move downward along the oil hammer limit guide sliding track, and under the action of the drill rod guide limit device, the sawtooth cross drill bit is positioned at the center of the treated pile;

[0016] 2) Start the high-frequency vibration oil hammer, supply oil to the high-frequency vibration oil hammer through the high-pressure oil pipeline, so that the high-frequency vibration oil hammer drives the cross drill rod and the sawtooth cross drill bit to drill downward, and at the same time start the high-pressure gas device, supply high-pressure gas to the high-pressure pipeline buried in the drill rod through the high-pressure water and gas pipeline, and spray it out from the nozzle of the high-pressure pipeline buried in the drill rod to cut the soil around the pile. When drilling to the designed position in turn, stop the supply of high-frequency vibration oil hammer and high-pressure gas, start the winch and towing system, and use the towing wire rope to make the high-frequency vibration oil hammer and the cross drill rod rise along the oil hammer limit guide sliding track, and finally make the sawtooth cross drill bit rise to a position above the ground line;

[0017] 3) Install a circular vibration plate with holes at the bottom of the sawtooth cross drill bit, and control the horizontal hydraulic expansion and contraction device and the vertical hydraulic expansion and contraction device of the soil feeder at the same time, so that the horizontal fixed truss of the soil feeder and the spiral cutter disc of the soil feeder are in the designed working position, start the high-frequency vibration oil hammer, and supply oil to the high-frequency vibration oil hammer through the high-pressure oil pipeline, so that the high-frequency vibration of the high-frequency vibration oil hammer drives the cross drill rod and the sawtooth cross drill bit to drill downward, and start the high-pressure gas device at the same time. The high-pressure gas is ejected from the nozzle of the high-pressure pipeline buried in the drill rod through the high-pressure water and gas pipeline and the high-pressure pipeline buried in the drill rod to cut the soil around the pile, so that the circular vibration plate with holes reaches the bottom of the designed position, close the high-pressure gas device, stop the high-pressure gas transmission, start the high-pressure water device, and the high-pressure water is ejected from the nozzle of the high-pressure pipeline buried in the drill rod through the high-pressure water and gas pipeline and the high-pressure pipeline buried in the drill rod to infiltrate the soil around the pile. The amount of water ejected should be based on the design The requirements of the specification have been determined through multiple on-site tests. At the same time, the winch and towing system is started, and the high-frequency vibration oil hammer and the cross drill rod are raised along the oil hammer limited guide sliding track by towing the wire rope, so that the serrated cross drill bit and the circular vibration plate with holes stop rising when they reach the designed vibration height. Subsequently, the high-frequency vibration oil hammer is started, and oil is supplied to the high-frequency vibration oil hammer through the high-pressure oil pipeline, so that the high-frequency vibration of the high-frequency vibration oil hammer drives the cross drill rod, the serrated cross drill bit and the circular vibration plate with holes to vibrate downward. The vibration is stopped after each layer reaches the designed vibration time or the vibration compression height, and then it is lifted upward to the designed height and then vibrated and compressed downward again, and the cycle is repeated until the original construction ground is reached. The drill bit should be slightly higher than the construction working surface. While cyclically lifting and vibrating and compacting, the soil feeder soil cutting and delivery spiral cutter disc is started, and the soil required for vibration compaction is continuously added to the borehole through the soil feeder soil cutting and delivery spiral cutter disc until the vibration treatment is completed.

[0018] The present invention has the following beneficial effects:

[0019] The device and method for high-frequency co-vibration treatment of collapsible loess described in the present invention, during specific operation, is composed of a crawler-type travel system configured with a power system, a winch and towing system, a hydraulic telescopic amplitude change system, an upright truss, a high-frequency vibration oil hammer, a cross-shaped drill rod, a circular vibration plate with holes, a spiral soil feeder and an operation control system to form an overall high-frequency co-vibration device for treating collapsible loess. The high-frequency co-vibration device for treating collapsible loess, which is formed by high-pressure water device and high-pressure gas device in conjunction with high-frequency vibration oil hammer, cross-shaped drill rod and circular vibration plate with holes, performs high-frequency vibration compaction and coordinated pre-cutting, pre-soaking and traction of high-frequency resonance to eliminate the collapsible property of loess, has a high overall mechanization and automation degree, strong maneuverability, flexibility and adaptability, simple construction, fast construction speed, good construction effect, a large range of treatment of collapsible loess, good treatment quality effect, economy and environmental protection, and in addition, each component is integrated on a working chassis, and the cost is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 It is a side view of the present invention.

[0022] Among them, 1 is a crawler driving system, 2 is a working chassis, 3 is an oil storage tank, 4 is a power system, 5 is a winch and towing system, 6 is an operation control system, 7 is a hydraulic telescopic luffing system, 8 is a towing wire rope, 9 is a vertical truss, 10 is an oil hammer limited guide sliding track, 11 is a high-pressure oil pipeline, 12 is a high-pressure water and gas pipeline, 13 is a high-frequency vibration oil hammer, 14 is a cross-shaped drill rod, 15 is a high-pressure pipeline buried in the drill rod, 16 is a drill rod guide limit device, 17 is the hydraulic pipeline of the drill rod guide limit device, 18 is the nozzle of the high-pressure pipeline buried in the drill rod, 19 is a sawtooth cross drill bit, 20 is a circular vibration plate with holes, 21 is a telescopic support truss, 22 is a hydraulic telescopic device of the support truss, 23 is a horizontal hydraulic telescopic device of the earth feeder, 24 is a vertical hydraulic telescopic device of the earth feeder, 25 is a horizontal fixed truss of the earth feeder, 26 is a spiral cutter disc for cutting and feeding the earth of the earth feeder, 27 is a high-pressure water device, and 28 is a high-pressure gas device. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0024] refer to Figure 1 to Figure 2The high-frequency co-vibration device for treating collapsible loess of the present invention comprises a crawler travel system 1, a working chassis 2, a hydraulic telescopic amplitude-changing system 7, a vertical truss 9, a high-frequency vibration oil hammer 13, a high-pressure pipeline buried in a drill pipe 15, a towing wire rope 8, a winch and towing system 5, a hydraulic telescopic device 22 for a supporting truss, a telescopic supporting truss 21, a horizontal hydraulic telescopic device 23 for a soil feeder, a vertical hydraulic telescopic device 24 for a soil feeder, a horizontal fixed truss 25 for a soil feeder, a spiral cutter head 26 for a soil feeder and an operation control system 6; the crawler travel system 1 is located at the working chassis 2. At the bottom of the plate 2, the hydraulic telescopic luffing system 7 is located on the working chassis 2, and the output shaft of the hydraulic telescopic luffing system 7 is connected to the middle of the upright truss 9, wherein the output shaft of the hydraulic telescopic luffing system 7 is tilted and distributed, and the side of the upright truss 9 is axially provided with an oil hammer limit guide sliding track 10, and the side of the high-frequency vibration oil hammer 13 is slidably connected to the oil hammer limit guide sliding track 10, and the side of the upright truss 9 is provided with a drill rod guide limit device 16 for axially limiting the high-frequency vibration oil hammer 13, and the upper end of the buried high-pressure pipeline 15 in the drill rod is connected to the output shaft at the bottom of the high-frequency vibration oil hammer 13, and the drill rod A sawtooth cross drill bit 19 is provided at the lower end of the buried high-pressure pipeline 15, one end of the towing wire rope 8 is connected to the winch towing system 5, and the other end of the towing wire rope 8 is connected to the high-frequency vibration oil hammer 13 after passing the pulley at the top of the upright truss 9; the upper end of the support truss hydraulic telescopic device 22 is fixed to the bottom of the upright truss 9, the lower end of the support truss hydraulic telescopic device 22 is connected to the side of the telescopic support truss 21, one end of the earth feeder horizontal hydraulic telescopic device 23 is connected to the side of the telescopic support truss 21, and the other end of the earth feeder horizontal hydraulic telescopic device 23 is connected to the earth feeder vertical hydraulic The upper end of the telescopic device 24 is connected, the horizontal fixed truss 25 of the soil feeder is fixed to the lower end of the vertical hydraulic telescopic device 24 of the soil feeder, and the spiral cutter disc 26 of the soil feeder is fixed to the bottom of the horizontal fixed truss 25 of the soil feeder; the output end of the operation control system 6 is connected to the control end of the crawler travel system 1, the control end of the hydraulic telescopic amplitude change system 7, the control end of the high-frequency vibration oil hammer 13, the control end of the support truss hydraulic telescopic device 22, the control end of the horizontal hydraulic telescopic device 23 of the soil feeder, the control end of the vertical hydraulic telescopic device 24 of the soil feeder and the control end of the spiral cutter disc 26 of the soil feeder.

[0025] A plurality of drill rod buried high pressure pipeline nozzles 18 are arranged on the side of the drill rod buried high pressure pipeline 15, and the outlet of the high pressure gas device 28 and the outlet of the high pressure water device 27 are both connected to the inside of the drill rod buried high pressure pipeline 15; a circular vibration plate 20 with holes is fixed to the bottom of the sawtooth cross drill bit 19. The drill rod guide limiter 16 is a hydraulic structure, and the drill rod guide limiter 16 is connected to the drill rod guide limiter hydraulic pipeline 17.

[0026] The present invention further comprises a power system 4 for driving a hoisting and traction system 5 and an oil storage tank 3 for providing hydraulic oil.

[0027] The outlet of the high-pressure gas device 28 and the outlet of the high-pressure water device 27 are connected to the interior of the buried high-pressure pipeline 15 in the drill pipe through the high-pressure water and gas pipeline 12; the present invention also includes a high-pressure oil pipeline 11 for supplying oil to the high-frequency vibration oil hammer 13.

[0028] The method for treating collapsible loess by high-frequency vibration of the present invention comprises the following steps:

[0029] 1) The crawler travel system 1 is controlled to move to the pile position by operating the control system 6, and then the hydraulic telescopic luffing system 7 is controlled to make the upright truss 9 stand vertically at a preset distance behind the pile, and the cross drill rod 14 and the sawtooth cross drill bit 19 are in the designed position; then the support truss hydraulic telescopic device 22 is controlled to extend, so that the telescopic support truss 21 is fixedly supported on the ground, and then the winch towing system 5 is controlled to tow the wire rope 8 to make the high-frequency vibration oil hammer 13 and the cross drill rod 14 move downward along the oil hammer limit guide slide track 10, and under the action of the drill rod guide limit device 16, the sawtooth cross drill bit 19 is positioned at the center of the treated pile;

[0030] 2) Start the high-frequency vibration oil hammer 13, supply oil to the high-frequency vibration oil hammer 13 through the high-pressure oil pipeline 11, so that the high-frequency vibration oil hammer 13 drives the cross drill rod 14 and the sawtooth cross drill bit 19 to drill downwards by high-frequency vibration, and start the high-pressure gas device 28 at the same time, supply high-pressure gas to the high-pressure pipeline 15 buried in the drill rod through the high-pressure water and gas pipeline 12, and spray it out through the nozzle 18 of the high-pressure pipeline buried in the drill rod to cut the soil around the pile. When drilling to the designed position in turn, stop the supply of high-frequency vibration oil hammer 13 and high-pressure gas, start the winch towing system 5, and make the high-frequency vibration oil hammer 13 and the cross drill rod 14 rise along the oil hammer limit guide sliding track 10 by towing the wire rope 8, and finally make the sawtooth cross drill bit 19 rise to a position above the ground line;

[0031] 3) Install a circular vibration plate 20 with holes at the bottom of the sawtooth cross drill bit 19, and control the horizontal hydraulic telescopic device 23 and the vertical hydraulic telescopic device 24 of the earth feeder to make the horizontal fixed truss 25 of the earth feeder and the earth feeder cutting spiral cutter head 26 in the designed working position, start the high-frequency vibration oil hammer 13, and supply oil to the high-frequency vibration oil hammer 13 through the high-pressure oil pipeline 11, so that the high-frequency vibration oil hammer 13 drives the cross drill rod 14 and the sawtooth cross drill bit 19 to drill downwards with high-frequency vibration, and at the same time The high-pressure gas device 28 is started, and the high-pressure gas is ejected from the nozzle 18 of the high-pressure pipeline buried in the drill rod through the high-pressure water-gas pipeline 12 and the high-pressure pipeline 15 buried in the drill rod to cut the soil around the pile, so that the circular vibration plate 20 with holes reaches the bottom of the designed position, the high-pressure gas device 28 is closed, the high-pressure gas transmission is stopped, and the high-pressure water device 27 is started, and the high-pressure water is ejected from the nozzle 18 of the high-pressure pipeline buried in the drill rod through the high-pressure water-gas pipeline 12 and the high-pressure pipeline 15 buried in the drill rod to infiltrate the soil around the pile, and the amount of water ejected is The size of the oil hammer 13 should be determined according to the requirements of the design specifications and after multiple on-site tests. At the same time, the winch and towing system 5 is started, and the high-frequency vibration oil hammer 13 and the cross drill rod 14 are raised along the oil hammer limit guide slide track 10 by towing the wire rope 8, so that the sawtooth cross drill bit 19 and the circular vibration plate 20 with holes stop rising when they rise to the designed vibration impact height, and then the high-frequency vibration oil hammer 13 is started, and oil is supplied to the high-frequency vibration oil hammer 13 through the high-pressure oil pipeline 11, so that the high-frequency vibration oil hammer 13 drives the cross drill rod 14, the sawtooth cross drill bit 19 and the circular vibration plate 20 with holes to vibrate at high frequency. The toothed cross drill bit 19 and the circular vibration plate 20 with holes vibrate downwards. After each layer reaches the designed vibration time or the height of vibration compression, the vibration is stopped. Then, it is lifted upwards to the designed height and then vibrated downwards again. The cycle is repeated until the original construction ground is reached. The drill bit should be slightly higher than the construction working surface. While the cycle is lifted and vibrated, the soil feeder soil cutting spiral cutter disc 26 is started. The soil feeder soil cutting spiral cutter disc 26 continuously replenishes the amount of soil required for vibration compaction into the borehole until the vibration treatment is completed.

[0032] 4) Control the horizontal hydraulic telescopic device 23 and the vertical hydraulic telescopic device 24 of the soil feeder to retract the horizontal fixed truss 25 of the soil feeder and the soil cutting spiral cutter 26 of the soil feeder to the storage position, control the hydraulic telescopic device 22 of the support truss to retract the telescopic support truss 21 and the horizontal fixed truss 25 of the soil feeder carried by it to the initial position, and then control the hydraulic telescopic amplitude variation system 7 to make the upright truss 9, high-frequency vibration oil hammer 13, cross-shaped drill rod 14, drill rod guide limit device 16, telescopic support truss 21 and horizontal fixed truss 25 of the soil feeder tilt toward the vehicle body as a whole to meet the requirements of lateral driving of the whole vehicle.

[0033] The present invention has the following beneficial effects:

[0034] A crawler travel system 1 is equipped with a power system 4, a winch and towing system 5, a hydraulic telescopic and variable amplitude system 7, an upright truss 9, a high-frequency vibration oil hammer 13, a cross drill rod 14, a circular vibration plate with holes 20, a spiral soil feeder and an operation control system 6 to form an overall high-frequency co-vibration device for treating collapsible loess. A high-frequency vibration compaction device for treating collapsible loess that cooperates with the high-frequency vibration oil hammer 13, the cross drill rod 14 and the circular vibration plate with holes 20 is formed. The device has a high-frequency co-vibration method for treating collapsible loess, which can be used for pre-cutting, pre-soaking, traction and high-frequency resonance to eliminate the collapsibility of the loess. The device has a high degree of overall mechanization and automation, strong mobility, flexibility, adaptability and speed, a large range of collapsible loess treatment, good treatment quality and effect, and is economical and environmentally friendly.

[0035] The present invention integrates and installs the power system 4, the winch and towing system 5, the hydraulic telescopic luffing system 7, the upright truss 9, the high-frequency vibration oil hammer 13, the cross drill rod 14, the circular vibration plate with holes 20, the soil feeder soil cutting spiral cutter head 26, the operation control system 6, the high-pressure water device 27 and the high-pressure gas device 28 on the working platform of the crawler travel system 1. It can be quickly put into place, conveniently transferred to other sites, has a strong ability to adapt to various construction sites, can reduce mutual interference with other processes, and create a good working environment.

[0036] The present invention adopts a crawler travel system 1, a hydraulic telescopic luffing system 7, a power system 4, a winch and towing system 5, a high-frequency vibration oil hammer 13, a spiral soil feeder, a high-pressure water device 27 and a high-pressure gas device 28, which are all uniformly controlled by an operation control system 6, which is automated and process-oriented. The positioning, drilling, vibration and transfer of the entire device to the next cycle are rapid and timely, and the process connections are close and the time intervals are short.

[0037] A winch and towing system 5, a towing wire rope 8, a high-frequency vibration oil hammer 13, a cross-shaped drill rod 14, an oil hammer guide sliding track 10 and a drill rod guide limiting device 16 are adopted. The cross-shaped drill rod 14 can be inserted into different hole depths according to the actual soil layer depth to meet the treatment requirements of collapsible loess at different depths. The treatment depth range is wide. The oil hammer guide sliding track 10 and the drill rod guide limiting device 16 can accurately control the position of the drill hole and the verticality of the drill rod, ensure the impact quality of the vibration plate under high-frequency vibration, and achieve better treatment effect.

[0038] By using a high-pressure water device 27, a high-pressure gas device 28, a high-pressure water and gas pipeline 12, a high-pressure pipeline buried in the drill rod 15 and a high-pressure pipeline nozzle 18 buried in the drill rod in conjunction with a high-frequency vibration oil hammer 13, a cross-shaped drill rod 14 and a circular vibration plate with holes 20, the surrounding soil can be cut over a larger range, and the pre-soaked collapsible loess pulls high-frequency synergistic resonance to accelerate the collapsible treatment process, and the comprehensive treatment effect of the collapsible loess is more obvious.

[0039] A horizontal spiral soil feeder is composed of a telescopic support truss 21, a support truss hydraulic telescopic device 22, a soil feeder horizontal hydraulic telescopic device 23, a soil feeder vertical hydraulic telescopic device 24, a soil feeder horizontal fixed truss 25 and a soil feeder soil cutting spiral cutter disc 26. The horizontal spiral soil feeder can be adjusted at multiple angles and depths to timely cut the ground soil into the borehole to fill the gap caused by the treatment of collapsible loess under the borehole, ensure the quality of the treatment, and avoid the risk of hole collapse.

Claims

1. A device for treating collapsible loess by high-frequency vibration, characterized in that: The crawler travel system (1) is located at the bottom of the working chassis (2), the hydraulic telescopic luffing system (7) is located on the working chassis (2), the output shaft of the hydraulic telescopic luffing system (7) is connected to the middle of the upright truss (9), wherein the output shaft of the hydraulic telescopic luffing system (7) is inclined, the side of the upright truss (9) is provided with an oil hammer limiting guide sliding track (10) along the axial direction, the side of the high-frequency vibration oil hammer (13) is slidably connected to the oil hammer limiting guide sliding track (10), and the side of the upright truss (9) is provided with A drill rod guide limiter (16) for axially limiting the high-frequency vibration oil hammer (13) is provided, the upper end of the high-pressure pipeline (15) buried in the drill rod is connected to the output shaft at the bottom of the high-frequency vibration oil hammer (13), the lower end of the high-pressure pipeline (15) buried in the drill rod is provided with a sawtooth cross drill bit (19), one end of the towing wire rope (8) is connected to the winch towing system (5), and the other end of the towing wire rope (8) is connected to the high-frequency vibration oil hammer (13) after passing through the pulley at the top of the upright truss (9); The upper end of the support truss hydraulic telescopic device (22) is fixed to the bottom of the upright truss (9), the lower end of the support truss hydraulic telescopic device (22) is connected to the side of the telescopic support truss (21), one end of the soil feeder horizontal hydraulic telescopic device (23) is connected to the side of the telescopic support truss (21), the other end of the soil feeder horizontal hydraulic telescopic device (23) is connected to the upper end of the soil feeder vertical hydraulic telescopic device (24), the soil feeder horizontal fixed truss (25) is fixed to the lower end of the soil feeder vertical hydraulic telescopic device (24), and the soil feeder soil cutting spiral cutter head (26) is fixed to the bottom of the soil feeder horizontal fixed truss (25); The output end of the operation control system (6) is connected to the control end of the crawler travel system (1), the control end of the hydraulic telescopic amplitude change system (7), the control end of the high-frequency vibration oil hammer (13), the control end of the support truss hydraulic telescopic device (22), the control end of the soil feeder horizontal hydraulic telescopic device (23), the control end of the soil feeder vertical hydraulic telescopic device (24) and the control end of the soil feeder soil cutting spiral cutter head (26); A plurality of drill rod buried high-pressure pipeline nozzles (18) are arranged on the side of the drill rod buried high-pressure pipeline (15), and the outlet of the high-pressure gas device (28) and the outlet of the high-pressure water device (27) are both connected to the interior of the drill rod buried high-pressure pipeline (15); It also includes a power system (4) for driving a winch and towing system (5) and an oil storage tank (3) for providing hydraulic oil.

2. The device for treating collapsible loess by high-frequency vibration according to claim 1 is characterized in that: A circular vibration plate (20) with holes is fixed to the bottom of the sawtooth cross drill bit (19).

3. The device for treating collapsible loess by high-frequency vibration according to claim 1 is characterized in that: The outlet of the high-pressure gas device (28) and the outlet of the high-pressure water device (27) are connected to the interior of the high-pressure pipeline (15) buried in the drill pipe through the high-pressure water and gas pipeline (12).

4. The device for treating collapsible loess by high-frequency vibration according to claim 1 is characterized in that: It also includes a high-pressure oil delivery pipe (11) for supplying oil to the high-frequency vibration oil hammer (13).

5. A method for treating collapsible loess by high-frequency vibration, characterized in that: The device for treating collapsible loess with high frequency vibration according to claim 2 comprises the following steps: 1) The crawler travel system (1) is controlled to move to the pile position by operating the control system (6), and then the hydraulic telescopic luffing system (7) is controlled to vertically erect the upright truss (9) at a preset distance behind the pile, and the cross drill rod (14) and the sawtooth cross drill bit (19) are in the designed position; then the support truss hydraulic telescopic device (22) is controlled to extend, so that the telescopic support truss (21) is fixedly supported on the ground, and then the winch towing system (5) is controlled to tow the wire rope (8) so that the high-frequency vibration oil hammer (13) and the cross drill rod (14) move downward along the oil hammer limit guide sliding track (10), and under the action of the drill rod guide limit device (16), the sawtooth cross drill bit (19) is positioned at the center of the pile to be treated; 2) starting the high-frequency vibration oil hammer (13), supplying oil to the high-frequency vibration oil hammer (13) through the high-pressure oil pipeline (11), so that the high-frequency vibration oil hammer (13) drives the cross-shaped drill rod (14) and the sawtooth cross drill bit (19) to drill downwards by high-frequency vibration, and at the same time starting the high-pressure gas device (28), supplying high-pressure gas to the high-pressure pipeline (15) buried in the drill rod through the high-pressure water and gas pipeline (12), and spraying it out through the nozzle (18) of the high-pressure pipeline buried in the drill rod to cut the soil around the pile. When the drilling reaches the designed position in sequence, the supply of the high-frequency vibration oil hammer (13) and the high-pressure gas is stopped, and the winch towing system (5) is started, and the high-frequency vibration oil hammer (13) and the cross-shaped drill rod (14) are raised along the oil hammer limit guide sliding track (10) by towing the steel wire rope (8), and finally the sawtooth cross drill bit (19) is raised to a position above the ground line; 3) A circular vibration plate (20) with holes is installed at the bottom of the sawtooth cross drill bit (19), and the horizontal hydraulic expansion and contraction device (23) and the vertical hydraulic expansion and contraction device (24) of the soil feeder are controlled at the same time, so that the horizontal fixed truss (25) of the soil feeder and the soil cutting spiral cutter head (26) of the soil feeder are in the designed working position, and the high-frequency vibration oil hammer (13) is started, and oil is supplied to the high-frequency vibration oil hammer (13) through the high-pressure oil pipe (11), so that the high-frequency vibration oil hammer (13) drives the cross drill rod (14) and the sawtooth cross drill bit (19) downward by high-frequency vibration. Drilling is performed, and at the same time, the high-pressure gas device (28) is started, and the high-pressure gas is ejected from the high-pressure pipe nozzle (18) buried in the drill rod through the high-pressure water-gas pipeline (12) and the high-pressure pipe (15) buried in the drill rod to cut the soil around the pile, so that the circular vibration plate (20) with holes reaches the bottom of the designed position, the high-pressure gas device (28) is closed, the high-pressure gas transmission is stopped, and the high-pressure water device (27) is started, and the high-pressure water is ejected from the high-pressure pipe nozzle (18) buried in the drill rod through the high-pressure water-gas pipeline (12) and the high-pressure pipe (15) buried in the drill rod to infiltrate the soil around the pile. The amount of water sprayed shall be determined according to the requirements of the design specifications and after multiple field tests. At the same time, the winch and towing system (5) is started, and the high-frequency vibration oil hammer (13) and the cross-shaped drill rod (14) are raised along the oil hammer limit guide slide track (10) by towing the wire rope (8). When the sawtooth cross drill bit (19) and the circular vibration plate with holes (20) rise to the designed vibration impact height, they stop rising. Then, the high-frequency vibration oil hammer (13) is started, and oil is supplied to the high-frequency vibration oil hammer (13) through the high-pressure oil pipeline (11), so that the high-frequency vibration oil hammer (13) drives the high-frequency vibration of the oil hammer (13). The cross-shaped drill rod (14), the sawtooth cross drill bit (19) and the circular vibration plate with holes (20) vibrate downwards. After each layer reaches the designed vibration time or the vibration compression height, the vibration is stopped. Then, it is lifted upwards to the designed height and then vibrated downwards again. The cycle is repeated until the original construction ground is reached. The drill bit should be slightly higher than the construction working surface. While the cycle is lifted and the vibration is vibrated, the soil feeder soil cutting spiral cutter disc (26) is started. The soil feeder soil cutting spiral cutter disc (26) continuously replenishes the amount of soil required for vibration compaction into the borehole until the vibration treatment is completed.

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