A deep layer resonance densification treatment equipment for the alluvial silt foundation in the lower reaches of the Yellow River

Abstract

This utility model discloses a deep resonance compaction treatment device for alluvial silty soil foundations in the lower reaches of the Yellow River. It includes a mobile device with a hydraulic drive system connected to a drive block via steel wire ropes and hooks. A hydraulic vibrator is fixedly connected to the lower end of the drive block, and the output shaft of the hydraulic vibrator is connected to a vibrating rod. The vibrating rod is a multi-stage wing-plate resonant vibrating rod, including a central rod with a conical head at its lower end. Main wing plates are symmetrically welded to both sides of the central rod, their planes parallel to the vibration direction. An auxiliary wing plate is located on the central rod between the two main wing plates, symmetrically welded to the other two sides of the central rod, its plane parallel to the ground and located above the vertical main wing plates. A first drainage hole is located on the vibrating rod above the auxiliary wing plates, and a second drainage hole is located on the conical head. This structure integrates multiple advantages such as three-dimensional compaction, efficient energy transfer, accelerated drainage, and drag reduction and energy consumption reduction.

Description

Technical Field

[0001] This utility model relates to the field of engineering foundation treatment technology, and in particular to a deep resonance compaction treatment device for alluvial silty soil foundations in the lower reaches of the Yellow River. Background Technology

[0002] The alluvial plains of the lower Yellow River are widely covered with loose, saturated silt layers. These soil layers are prone to liquefaction under dynamic loads such as earthquakes, leading to foundation failure and seriously threatening building safety. Resonant compaction is a highly efficient and economical method for deep foundation reinforcement. Its principle involves using a hydraulic vibrator to generate high-frequency vibrations, driving a rigid vibrator rod deep into the soil. This causes the saturated silt around the rod to liquefy and rearrange itself into a denser structure, thereby increasing the foundation's bearing capacity and eliminating liquefaction.

[0003] In existing technologies, vibratory rods come in various forms, such as "cross-shaped" and "double-pronged" shapes. While each has its advantages, some shortcomings remain when dealing with the unique silty soil foundations of the lower Yellow River basin. 1. Symmetrical structures such as "cross-shaped" mainly generate radial compression, which has a good reinforcement effect in the horizontal direction, but is relatively weak in the vertical direction of soil disturbance and compaction, and is prone to forming a layered reinforcement effect. 2. Most existing vibratory rods are of general design and fail to fully consider the characteristics of Yellow River silt, such as poor drainage conditions and slow reconsolidation process after vibration liquefaction, which affects the final compaction effect. Utility Model Content

[0004] The purpose of this invention is to provide a deep resonance compaction treatment device for alluvial silty soil foundations in the lower reaches of the Yellow River, which solves the problems mentioned above.

[0005] To achieve the above objectives, a deep resonance compaction treatment device for alluvial silty soil foundation in the lower reaches of the Yellow River is provided. The device includes a mobile unit, a hydraulic drive system connected to a drive block via a steel wire rope and hooks, a hydraulic vibrator fixedly connected to the lower end of the drive block, and a vibrating rod connected to the output shaft of the hydraulic vibrator. The vibrating rod is a multi-stage wing-plate resonant vibrating rod, including a central rod with a conical head at its lower end. Main wing plates are symmetrically welded to both sides of the central rod, their planes parallel to the vibration direction. An auxiliary wing plate is symmetrically welded to the other two sides of the central rod between the two main wing plates, its plane parallel to the ground and located above the vertical main wing plates. A first drainage hole is provided on the vibrating rod above the auxiliary wing plates, and a second drainage hole is provided on the conical head.

[0006] According to the deep resonance compaction treatment device for alluvial silt foundation in the lower reaches of the Yellow River, the edges of the main wing plate and the auxiliary wing plate are both designed as concave arc-shaped blades.

[0007] According to the deep resonance compaction treatment device for alluvial silt foundation in the lower reaches of the Yellow River, a pair of main wing plates and auxiliary wing plates constitute a wing plate assembly, and multiple wing plate assemblies are provided on the central rod.

[0008] According to the deep resonance compaction treatment device for alluvial silty soil foundation in the lower reaches of the Yellow River, the spacing of the wing plate assembly gradually decreases from top to bottom.

[0009] According to the deep resonance compaction treatment device for alluvial silty soil foundation in the lower reaches of the Yellow River, a connector is fixedly connected to the upper end of the drive block, a fixed shaft is provided between the two connectors, and a figure-eight ring is installed on the fixed shaft.

[0010] According to the aforementioned deep resonance compaction treatment device for alluvial silty soil foundation in the lower reaches of the Yellow River, a mounting rod is fixedly connected to the mobile device, and a drive block is mounted on the mounting rod and can slide up and down.

[0011] According to the deep resonance compaction treatment equipment for alluvial silty soil foundation in the lower reaches of the Yellow River, a pulley block is installed on the mounting rod, and the steel wire rope is connected to the drive block through the pulley block.

[0012] According to the deep resonance compaction treatment device for alluvial silt foundation in the lower reaches of the Yellow River, there are several first drainage holes distributed between the main wing plate and the auxiliary wing plate, and there are six second drainage holes evenly distributed on the conical head.

[0013] This utility model has the following beneficial effects: 1. Compared with existing technologies, by combining the "vertical main wing plate" and the "horizontal auxiliary wing plate" in a spatial combination design, the vibrator can generate strong radial shear force through the main wing plate when vibrating horizontally, and can also generate vertical shear and "slapping" effects on the soil above and below through the auxiliary wing plate. This achieves synchronous and uniform compaction in both horizontal and vertical directions, effectively avoids the phenomenon of layered reinforcement, and forms a more uniform and stable cylindrical reinforced body.

[0014] 2. Compared with existing technologies, the use of multi-level distributed wing plates greatly increases the effective contact area between the vibrator and the soil, enabling the vibration energy generated by the hydraulic vibrator to be transmitted more fully and efficiently to the soil at a greater distance, thereby significantly increasing the effective reinforcement radius of single-point construction and improving construction efficiency. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a structural diagram of a deep resonance compaction treatment device for alluvial silty soil foundation in the lower reaches of the Yellow River, according to this utility model. Figure 2This is a structural diagram of the drive block of a deep resonance compaction treatment device for alluvial silty soil foundation in the lower reaches of the Yellow River according to this utility model. Figure 3 This is a diagram of the vibrating rod structure of a deep resonance compaction treatment device for alluvial silty soil foundation in the lower reaches of the Yellow River according to this utility model; Figure 4 This is a top view of the vibrating rod of a deep resonance compaction treatment device for alluvial silty soil foundation in the lower reaches of the Yellow River, according to this utility model.

[0016] Legend: 1. Mobile device; 2. Drive block; 21. Connector; 22. Fixed shaft; 23. Figure-eight ring; 3. Hydraulic vibrator; 4. Vibration rod; 41. Center rod; 42. Conical head; 43. Main wing plate; 44. Auxiliary wing plate; 45. First drainage hole; 46. Second drainage hole; 5. Mounting rod; 6. Pulley block. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] Reference Figure 1-4 This utility model embodiment provides a deep resonance compaction treatment device for alluvial silty soil foundation in the lower reaches of the Yellow River, which includes a mobile device 1. The mobile device 1 is usually a crawler crane with walking and heavy lifting functions. The hydraulic drive system on the mobile device 1 provides power and is connected to the upper end of the drive block 2 through wire rope and hook.

[0019] A connector 21 is fixedly connected to the upper end of the drive block 2, and a fixed shaft 22 is provided between the two connectors 21. A figure-eight ring 23 is installed on the fixed shaft 22. The lower end of the drive block 2 is rigidly connected to the housing of the hydraulic vibrator 3 by high-strength bolts. An installation rod 5 is fixedly connected to the mobile device 1. The drive block 2 is installed on the installation rod 5 and can slide up and down. A pulley block 6 is installed on the installation rod 5. The wire rope is connected to the drive block 2 through the pulley block 6. The output shaft of the hydraulic vibrator 3 is connected to a vibrating rod 4. The vibrating rod 4 is directly connected to the output shaft of the hydraulic vibrator 3 through a special clamp, thereby transmitting strong horizontal vibration force to the soil without loss. The vibrating rod 4 is a multi-stage wing plate resonant vibrating rod, and includes a central rod 41. The lower end of the central rod 41 is provided with a conical head 42. The primary function of the conical head 42 is to break through the soil and reduce resistance, and guide the vibrating rod 4 to penetrate smoothly to the predetermined treatment depth. The central rod 41 is provided with main wing plates 43 on both sides. The main wing plates 43 are symmetrically welded to both sides of the central rod 41. Their planes are parallel to the vibration direction, and they are the main working surfaces that generate strong radial extrusion force and shear waves. They are responsible for efficiently propagating the vibration energy radially, thereby liquefying and compacting the surrounding soil. The central rod 41 located between the two main wing plates 43 is provided with auxiliary wing plates 44. The auxiliary wing plates 44 are symmetrically welded to the other two sides of the central rod 41. Their planes are parallel to the ground and located above the vertical main wing plates 43. During the vibration process, the auxiliary wing plates 44 generate significant vertical shear and "slapping" effects on the soil above and below, effectively breaking the layered structure common in Yellow River silt, achieving uniform compaction in the vertical direction, and solving the problem of uneven reinforcement of traditional "cross-shaped" vibrating rods. The edges of the main wing plate 43 and the auxiliary wing plate 44 are designed as concave arc-shaped blades, which greatly reduces the frictional resistance of the vibrating rod 4 during sinking and lifting. At the same time, a micro-vacuum zone can be formed behind the blade during vibration, which promotes the rolling and rearrangement of soil particles. A pair of main wing plates 43 and auxiliary wing plates 44 form a wing plate assembly. Multiple wing plate assemblies are provided on the central rod 41. The spacing between the wing plate assemblies gradually decreases from top to bottom. The denser wing plates at the bottom can concentrate energy output to ensure that the foundation can achieve a uniform design density throughout the entire treatment depth from shallow to deep. The vibrating rod 4 located above the auxiliary wing plate 44 is provided with a first drainage hole 45, which can effectively accelerate the dissipation of excess pore water pressure generated during vibration liquefaction and promote rapid soil consolidation; the conical head 42 is provided with a second drainage hole 46, which, in addition to assisting drainage, can also reduce the "piston effect" when the head penetrates, further reducing the sinking resistance; there are several first drainage holes 45, which are distributed between the main wing plate 43 and the auxiliary wing plate 44, and there are six second drainage holes 46, which are evenly distributed on the conical head 42.

[0020] Working Principle: During use, the mobile device 1 travels to the designated pile position and vertically lifts the vibration system consisting of the drive block 2, hydraulic vibrator 3, and vibrating rod 4 using the hoisting system. The hydraulic vibrator 3 is activated, and its high-frequency horizontal vibration is transmitted to the soil through the vibrating rod 4. Under the combined action of the vibration force and the conical head 42 and curved edge, the vibrating rod 4 overcomes soil resistance and sinks to the design depth. During this process, the wing plate assembly strongly disturbs the surrounding soil, causing initial liquefaction. After the vibrating rod 4 reaches the design depth, it continues to vibrate for a certain period (usually 10-30 seconds). During this period, the main wing plate 43 and auxiliary wing plate 44 act on the soil from both horizontal and vertical directions, maximizing the liquefaction range. Simultaneously, pore water in the soil, driven by excess pore water pressure, is rapidly discharged through the short path formed by the first drainage hole 45 and the second drainage hole 46. Soil particles rearrange themselves during the effective stress recovery process, becoming extremely dense. Subsequently, the vibrating rod 4 is uniformly lifted at a certain speed (e.g., 1-2 meters per minute). During the lifting process, the lifting can be stopped at certain intervals (such as 0.3 to 0.5 meters) and the vibration can be maintained for several seconds, thereby forming a series of dense piles stacked together in the vertical direction.

[0021] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A deep layer resonance compaction treatment equipment for the alluvial silt foundation in the lower reaches of the Yellow River, characterized in that, The device includes a mobile device (1), on which a hydraulic drive system is connected to a drive block (2) via a wire rope and a hook. A hydraulic vibrator (3) is fixedly connected to the lower end of the drive block (2), and a vibrating rod (4) is connected to the output shaft of the hydraulic vibrator (3). The vibrating rod (4) is a multi-stage wing plate resonant vibrating rod, and includes a central rod (41). The lower end of the central rod (41) is provided with a conical head (42). The central rod (41) is provided with main wing plates (43) on both sides. The main wing plates (43) are symmetrically welded to both sides of the central rod (41), and their planes are parallel to the vibration direction. An auxiliary wing plate (44) is provided on the central rod (41) between the two main wing plates (43). The auxiliary wing plate (44) is symmetrically welded to the other two sides of the central rod (41), and its plane is parallel to the ground and located above the vertical main wing plate (43). The vibrating rod (4) above the auxiliary wing plate (44) is provided with a first drainage hole (45), and the conical head (42) is provided with a second drainage hole (46).

2. The deep layer resonance densification treatment equipment for the alluvial silt foundation in the lower reaches of the Yellow River according to claim 1, characterized in that, The edges of the main wing plate (43) and the auxiliary wing plate (44) are both designed as concave arc-shaped blade edges.

3. The deep layer resonance densification treatment equipment for the alluvial silt foundation in the lower reaches of the Yellow River according to claim 2, characterized in that, The main wingplate (43) and the auxiliary wingplate (44) together form a wingplate assembly, and multiple wingplate assemblies are provided on the central rod (41).

4. The deep layer resonance densification treatment equipment for the alluvial silt foundation in the lower reaches of the Yellow River according to claim 3, characterized in that, The spacing between the wingplate assemblies gradually decreases from top to bottom.

5. The deep resonance compaction treatment equipment for alluvial silty soil foundation in the lower reaches of the Yellow River according to claim 4, characterized in that, The upper end of the drive block (2) is fixedly connected to a connector (21), and a fixed shaft (22) is provided between the two connectors (21) on both sides. A figure-eight ring (23) is installed on the fixed shaft (22).

6. The deep layer resonance densification treatment equipment for the alluvial silt foundation in the lower reaches of the Yellow River according to claim 5, characterized in that, The mobile device (1) is fixedly connected to a mounting rod (5), and the drive block (2) is mounted on the mounting rod (5) and can slide up and down.

7. The device according to claim 6, characterized in that, The mounting rod (5) is equipped with a pulley block (6), and the wire rope is connected to the drive block (2) through the pulley block (6).

8. The deep layer resonance densification treatment equipment for the alluvial silt foundation in the lower reaches of the Yellow River according to claim 7, characterized in that, There are several first drainage holes (45) distributed between the main wing plate (43) and the auxiliary wing plate (44), and there are six second drainage holes (46) evenly distributed on the conical head (42).

Images