A soft soil solidification device

Abstract

The utility model relates to the technical field of soft soil solidification, and disclose a kind of soft soil solidification device, including pile machine main body, the side of pile machine main body is fixedly arranged with lifting column, the side surface of lifting column is slidably arranged with lifting platform driven by motor, and the bottom of lifting platform is rotatably arranged with double-shaft drill bit.The soft soil solidification device realizes multiple functions by adjusting mechanism, first, according to the different damping caused by the humidity of soil, to dynamically adjust the flow of curing agent, the rotating member automatically adjusts the exposed area of the guniting pipe according to the soil pressure, the flow is reduced for dry soil and increased for wet soil, which solves the problem of uneven curing agent consumption of the existing device, ensures the uniformity of the curing strength of the mixing pile, improves the stability of the engineering quality, and the processing member filters large particles of sand and gravel through the screen holes to avoid the soil pressure being disturbed by non-humidity factors, to ensure the accuracy of dynamic adjustment.

Description

Technical Field

[0001] This utility model relates to the field of soft soil solidification technology, and in particular to a soft soil solidification device. Background Technology

[0002] In my country's soft soil areas, especially in the Pearl River Delta region, there are numerous foundation pit projects. The technology is becoming increasingly mature, diversified, and refined, and is widely used in retaining wall technology. Combined with dewatering and reinforcement measures, the support forms are diverse and the designs are more refined. In foundation pit projects in soft soil areas, the primary task is to solidify the soft soil. There are various existing soft soil solidification schemes, but generally, piles are first driven around the foundation pit and then a support structure is built inside the foundation pit to ensure the strength of the soil.

[0003] Among the various types of piles used to reinforce soft soil, there are mixing piles. These piles utilize drilling equipment to drill holes in the soft soil and spray a curing agent into the soil during the drilling process. Simultaneously, they are highly mixed to ensure that the curing agent and the soft soil are fully combined, forming a pile structure with high strength. However, in deep soft soil, the moisture content varies at different depths. Existing mixing pile construction equipment cannot adjust the amount of curing agent sprayed according to the soil moisture content, resulting in uneven curing of the pile due to the different moisture content of the soil. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is that the water content of soft soil at different heights is different in deep soft soil, and the existing mixing pile construction device cannot change the amount of curing agent sprayed according to the soil water content, resulting in uneven curing of the pile body due to the different soil water content.

[0005] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a soft soil solidification device, including a pile driver body, a lifting column fixedly installed on one side of the pile driver body, a lifting platform driven by a motor slidably installed on the side of the lifting column, a dual-axis drill bit rotatably installed at the bottom of the lifting platform, a number of stirring blades fixedly installed on the side of the dual-axis drill bit, a central rotating cylinder connected to a solidifying agent via a pipe inside the dual-axis drill bit, a number of grouting pipes connected to the side of the central rotating cylinder, the end of the grouting pipe away from the central rotating cylinder connected to the side of the dual-axis drill bit, and an adjustment mechanism installed inside the dual-axis drill bit; the adjustment mechanism includes a pressure relief component installed on the inner wall of the central rotating cylinder for bearing the pressure of the solidifying agent, a rotating component installed on the inner wall of the central rotating cylinder for adjusting the flow rate of the grouting pipes, and a processing component installed on the side of the dual-axis drill bit.

[0006] In a preferred embodiment of the soft soil solidification device of this utility model: the pressure relief component includes a connecting rod fixedly disposed on the top wall inside the transfer cylinder, and a pressure-bearing plate fixedly disposed on the end of the connecting rod away from the transfer cylinder.

[0007] In a preferred embodiment of the soft soil solidification device of this utility model: the pressure plate is a conical panel, the conical part of the pressure plate faces the direction in which the solidifying agent enters the transfer cylinder, and the bottom edge of the pressure plate is lower than the lowest point of the side of the spray pipe.

[0008] In a preferred embodiment of the soft soil solidification device of this utility model: the rotating component includes a rotating ring sleeved and rotatably disposed on the side of the dual-axis drill bit, a pressure plate fixedly disposed on the side of the rotating ring away from the dual-axis drill bit, an arc-shaped hole opened on the side of the dual-axis drill bit, a baffle frame rotatably disposed at the bottom of the inner wall of the rotating cylinder, a rotating shaft fixedly disposed at the bottom of the baffle frame, and a connecting plate fixedly disposed on the side of the rotating shaft.

[0009] In a preferred embodiment of the soft soil solidification device of this utility model: the rotating ring is disposed below the grouting pipe, the number of pressure plates is the same as the number of grouting pipes, a plurality of pressure plates are arranged in an annular array on the side of the rotating ring, a plurality of arc-shaped holes are arranged in an annular array on the side of the biaxial drill bit, and the rotating ring is connected to the side of the biaxial drill bit in the form of a dynamic seal to prevent mud from entering the interior of the biaxial drill bit.

[0010] In a preferred embodiment of the soft soil solidification device of this utility model: the baffle frame is provided with three baffles arranged in a circumferential array on the side of the rotating shaft, each baffle abutting against the inlet of the grouting pipe, and each baffle is slidably arranged on the side of the pressure plate away from the grouting pipe, and each baffle can prevent the solidifying agent from flowing from the transfer cylinder to the grouting pipe.

[0011] In a preferred embodiment of the soft soil solidification device of this utility model: the side of the connecting plate away from the rotating shaft passes through the arc-shaped hole and is fixedly disposed on the inner side of the rotating ring; the side of the connecting plate is slidably disposed on the inner wall of the arc-shaped hole; and a torsion spring is arranged around the side of the rotating shaft and the bottom of the central rotating cylinder.

[0012] In a preferred embodiment of the soft soil solidification device of this utility model: the processing component includes a protective shell fixedly disposed on the side of the biaxial drill bit, a sieve hole opened on the side of the protective shell, and an elastic wing fixedly disposed on the side of each protective shell.

[0013] In a preferred embodiment of the soft soil solidification device of this utility model: the number of protective shells is the same as the number of pressure plates and they are arranged in a uniform ring array on the side of the biaxial drill bit. Each protective shell covers the outside of the pressure plate. One end of the protective shell is closed and slidably arranged on the side of the rotating ring, while the other end is open. Each protective shell has a pair of elastic wings on its side, which are symmetrically arranged on the upper and lower sides of the protective shell.

[0014] The beneficial effects of this utility model are as follows: This soft soil solidification device achieves multiple functions through the adjustment mechanism. First, it dynamically adjusts the flow rate of the solidifying agent according to the different damping caused by the soil moisture. The rotating part automatically adjusts the exposed area of ​​the grouting pipe according to the soil pressure, reducing the flow rate for dry soil and increasing the flow rate for wet soil. This solves the problem of uneven solidifying agent dosage in existing devices, ensuring consistent solidification strength throughout the mixing pile and improving the stability of project quality. Furthermore, the processing part filters large particles of sand and gravel through the sieve to prevent soil pressure from being interfered with by non-humidity factors, thus ensuring the accuracy of dynamic adjustment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model and are not intended to limit the scope of this utility model. Wherein:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial schematic diagram of the dual-axis drill bit in Embodiment 1 of this utility model;

[0018] Figure 3 This is a schematic diagram showing the position of the rotating component in Embodiment 2 of this utility model;

[0019] Figure 4 This is a schematic diagram showing the positions of the rotating cylinder and the rotating component in Embodiment 2 of this utility model;

[0020] Figure 5 This is a schematic diagram of the internal structure of the transfer cylinder in Embodiment 2 of this utility model;

[0021] Figure 6 This is a schematic diagram of the rotating component structure in Embodiment 2 of this utility model;

[0022] Figure 7 This is a schematic diagram of the processing component structure in Embodiment 2 of this utility model.

[0023] In the picture:

[0024] 1. Piling machine body; 2. Lifting column; 3. Lifting platform; 4. Dual-axis drill bit; 5. Mixing blade; 6. Central rotating cylinder; 7. Shotcrete pipe; 8. Adjustment mechanism; 81. Pressure relief component; 811. Connecting rod; 812. Pressure bearing plate; 82. Rotating component; 821. Rotating ring; 822. Pressure plate; 823. Arc-shaped hole; 824. Baffle frame; 825. Rotating shaft; 826. Connecting plate; 83. Processing component; 831. Protective shell; 832. Elastic wing. Detailed Implementation

[0025] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0026] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0027] Example 1,

[0028] Reference Figures 1-2 This embodiment provides a soft soil solidification device, including a pile driver body 1, a lifting column 2 fixedly installed on one side of the pile driver body 1, a lifting platform 3 driven by a motor slidably installed on the side of the lifting column 2, a dual-axis drill bit 4 rotatably installed at the bottom of the lifting platform 3, a plurality of stirring blades 5 fixedly installed on the side of the dual-axis drill bit 4, a central rotating cylinder 6 connected to a solidifying agent via a pipe inside the dual-axis drill bit 4, a plurality of grouting pipes 7 connected to the side of the central rotating cylinder 6, and the end of the grouting pipe 7 away from the central rotating cylinder 6 connected to the side of the dual-axis drill bit 4. The device is characterized by further including an adjustment mechanism 8 installed inside the dual-axis drill bit 4; the adjustment mechanism 8 includes a pressure relief component 81 installed on the inner wall of the central rotating cylinder 6 for bearing the pressure of the solidifying agent, a rotating component 82 installed on the inner wall of the central rotating cylinder 6 for adjusting the flow rate of the grouting pipes 7, and a processing component 83 installed on the side of the dual-axis drill bit 4.

[0029] During the construction of the mixing pile, the main body 1 of the pile driver stays in a fixed position, and then the lifting platform 3 lowers the dual-axis drill bit 4 down to the ground along the lifting column 2. During the drilling process, the hardener is delivered from the inside of the drill bit to the central transfer cylinder 6, and then sprayed out through the grouting pipe after passing through the central transfer cylinder 6.

[0030] Example 2,

[0031] Reference Figures 2-7 The pressure relief component 81 includes a connecting rod 811 fixedly installed on the top wall inside the transfer cylinder 6, and a pressure plate 812 fixedly installed on the end of the connecting rod 811 away from the transfer cylinder 6. The pressure plate 812 is a conical panel with the cone facing the direction in which the curing agent enters the transfer cylinder 6. The bottom edge of the pressure plate 812 is lower than the lowest point of the side of the spray pipe 7.

[0032] The main function of the pressure relief component 81 is to first withstand the impact pressure from the curing agent and prevent the rotating shaft 825 from being unable to rotate under the impact of the curing agent. Therefore, the connecting rod 811 and the pressure plate 812 should be made of high-strength metal. A large amount of curing agent from the top of the transfer cylinder 6 falls onto the pressure plate 812. After impacting the pressure plate 812, the pressure is relatively reduced and impacts the grouting pipe 7, which is then sprayed into the soil through the grouting nozzle.

[0033] The rotating component 82 includes a rotating ring 821 sleeved and rotatably disposed on the side of the dual-axis drill bit 4, a pressure plate 822 fixedly disposed on the side of the rotating ring 821 away from the dual-axis drill bit 4, an arc-shaped hole 823 opened on the side of the dual-axis drill bit 4, a baffle frame 824 rotatably disposed at the bottom of the inner wall of the intermediate rotating cylinder 6, a rotating shaft 825 fixedly disposed at the bottom of the baffle frame 824, and a connecting plate 826 fixedly disposed on the side of the rotating shaft 825. The rotating ring 821 is disposed below the grouting pipe 7. The number of pressure plates 822 is the same as the number of grouting pipes 7. Several pressure plates 822 are arranged in a ring array on the side of the rotating ring 821. Several arc-shaped holes 823 are arranged in a ring array on the side of the dual-axis drill bit 4.

[0034] The rotating ring 821 is connected to the side of the dual-axis drill bit 4 in the form of a dynamic seal to prevent mud from entering the interior of the dual-axis drill bit 4. The baffle frame 824 is provided with three baffles arranged in a circumferential array on the side of the rotating shaft 825. Each baffle abuts against the inlet of the grouting pipe 7. The side of each baffle away from the grouting pipe 7 is slidably arranged on the side of the pressure plate 812. Each baffle can block the curing agent from flowing from the intermediate rotating cylinder 6 to the grouting pipe 7. The side of the connecting plate 826 away from the rotating shaft 825 passes through the arc-shaped hole 823 and is fixedly arranged on the inner side of the rotating ring 821. The side of the connecting plate 826 is slidably arranged on the inner wall of the arc-shaped hole 823. A torsion spring is arranged around the side of the rotating shaft 825 and the bottom of the intermediate rotating cylinder 6.

[0035] The rotating component 82 mainly adjusts the flow rate of the grouting pipe 7 based on the moisture level of the soil. The lower the soil moisture and the drier the soil, the greater the pressure on the pressure plate 822 during drilling. Under the reaction of the pressure plate 822, the rotating ring 821 rotates more, which in turn drives the rotating shaft 825 to rotate. The rotating shaft 825 then drives the baffle frame 824 to rotate. After the baffle frame 824 rotates, each baffle can cover more of the grouting pipe 7 area, thereby reducing the flow rate of the curing agent sprayed from the grouting pipe 7. Conversely, when the soil moisture increases, the pressure of the soil on the pressure plate 822 decreases, and the rotating shaft 825 slowly rotates under the action of the torsion spring, causing more of the grouting pipe 7 opening area to be exposed, thereby increasing the flow rate of the grouting pipe 7. It is worth noting that the opening of the grouting pipe 7 is in a normally open state, but can be dynamically adjusted according to the soil moisture and the exposed area of ​​the opening, so that the mixing pile can be uniformly cured in all places.

[0036] The processing component 83 includes a protective shell 831 fixedly disposed on the side of the dual-axis drill bit 4, a sieve hole opened on the side of the protective shell 831, and elastic wings 832 fixedly disposed on the side of each protective shell 831. The number of protective shells 831 is the same as the number of pressure plates 822 and they are arranged in a circular and uniform array on the side of the dual-axis drill bit 4. Each protective shell 831 covers the outside of the pressure plate 822. One end of the protective shell 831 is kept closed and slidably disposed on the side of the rotating ring 821, while the other end is open. Each protective shell 831 has a pair of elastic wings 832 on its side, which are symmetrically disposed on the upper and lower sides of the protective shell 831.

[0037] The treatment component 83 is used to screen the soil. Because the soil composition deep in the soil is relatively complex, it contains not only sand and gravel, but also hard stones. Therefore, it is necessary to use the treatment to screen and filter the soil to ensure that the soil particle size near the pressure plate 822 is consistent and to avoid other factors from affecting the soil pressure. Firstly, during the process of the dual-axis rotary head penetrating the soil, the outer elastic wing 832 will directly contact the soil. However, since the drill bit is generally moving downwards, the soil will enter the protective shell 831 from the upper and lower sides of the elastic wing 832. The screen holes of the protective shell 831 play a role in screening soil particles, preventing large stones from entering the protective shell 831. The protective shell 831 itself also bears most of the pressure, preventing damage to the pressure plate 822. Furthermore, due to the high-speed rotation of the dual-axis drill bit 4, the sides of the elastic wing 832 will also experience pressure from the soil. Thus, the soil between the elastic wing 832 and the protective shell 831 is forced into the protective shell 831 through the screen holes, which increases the screening efficiency of the protective shell 831 and avoids clogging of the screen holes due to excessively high soil viscosity.

[0038] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. A soft soil solidification device, comprising a pile driver body (1), a lifting column (2) fixedly installed on one side of the pile driver body (1), a lifting platform (3) driven by a motor slidably installed on the side of the lifting column (2), a dual-axis drill bit (4) rotatably installed at the bottom of the lifting platform (3), a plurality of mixing blades (5) fixedly installed on the side of the dual-axis drill bit (4), a central rotating cylinder (6) connected to a solidifying agent via a pipe is installed inside the dual-axis drill bit (4), a plurality of grouting pipes (7) are connected to the side of the central rotating cylinder (6), and one end of the grouting pipe (7) away from the central rotating cylinder (6) is connected to the side of the dual-axis drill bit (4), characterized in that: It also includes an adjustment mechanism (8) located inside the biaxial drill bit (4); The adjustment mechanism (8) includes a pressure relief component (81) disposed on the inner wall of the transfer cylinder (6) and used to withstand the pressure of the curing agent, a rotating component (82) disposed on the inner wall of the transfer cylinder (6) and used to adjust the flow rate of the spray pipe (7), and a processing component (83) disposed on the side of the dual-axis drill bit (4).

2. The soft soil stabilization device according to claim 1, characterized in that: The pressure relief component (81) includes a connecting rod (811) fixedly installed on the top wall inside the transfer cylinder (6) and a pressure plate (812) fixedly installed on the end of the connecting rod (811) away from the transfer cylinder (6).

3. The soft soil stabilization device according to claim 2, characterized in that: The pressure plate (812) is a conical panel with the tip of the cone facing the direction of the curing agent entering the transfer cylinder (6). The bottom edge of the pressure plate (812) is lower than the lowest point of the side of the spray pipe (7).

4. The soft soil stabilization device according to claim 1, characterized in that: The rotating component (82) includes a rotating ring (821) sleeved and rotatably disposed on the side of the dual-axis drill bit (4), a pressure plate (822) fixedly disposed on the side of the rotating ring (821) away from the dual-axis drill bit (4), an arc-shaped hole (823) opened on the side of the dual-axis drill bit (4), a baffle frame (824) rotatably disposed at the bottom of the inner wall of the intermediate rotating cylinder (6), a rotating shaft (825) fixedly disposed at the bottom of the baffle frame (824), and a connecting plate (826) fixedly disposed on the side of the rotating shaft (825).

5. The soft soil stabilization device according to claim 4, characterized in that: The rotating ring (821) is located below the grouting pipe (7). The number of pressure plates (822) is the same as the number of grouting pipes (7). Several pressure plates (822) are arranged in a ring array on the side of the rotating ring (821). Several arc-shaped holes (823) are arranged in a ring array on the side of the dual-axis drill bit (4). The rotating ring (821) is connected to the side of the dual-axis drill bit (4) in the form of a dynamic seal to prevent mud from entering the interior of the dual-axis drill bit (4).

6. The soft soil stabilization device according to claim 4, characterized in that: The baffle frame (824) is provided with three baffles arranged in a circumferential array on the side of the rotating shaft (825). Each baffle abuts against the opening of the spray pipe (7). The side of each baffle away from the spray pipe (7) is slidably arranged on the side of the pressure plate (812). Each baffle can prevent the curing agent from flowing from the transfer cylinder (6) to the spray pipe (7).

7. The soft soil stabilization device according to claim 4, characterized in that: The side of the connecting plate (826) away from the rotating shaft (825) passes through the arc-shaped hole (823) and is fixedly installed on the inner side of the rotating ring (821). The side of the connecting plate (826) is slidably installed on the inner wall of the arc-shaped hole (823). A torsion spring is arranged around the side of the rotating shaft (825) and the bottom of the central rotating cylinder (6).

8. The soft soil stabilization device according to claim 1, characterized in that: The processing component (83) includes a protective shell (831) fixedly disposed on the side of the biaxial drill bit (4), a sieve hole opened on the side of the protective shell (831), and an elastic wing (832) fixedly disposed on the side of each protective shell (831).

9. A soft soil stabilization device according to claim 8, characterized in that: The number of protective shells (831) is the same as the number of pressure plates (822) and they are arranged in a uniform ring array on the side of the dual-axis drill bit (4). Each protective shell (831) covers the outside of the pressure plate (822). One end of the protective shell (831) is closed and slidably arranged on the side of the rotating ring (821), while the other end is open. Each protective shell (831) has a pair of elastic wings (832) on its side, which are symmetrically arranged on the upper and lower sides of the protective shell (831).

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