Rotary jet grouting pile construction device in deep foundation pit engineering

Abstract

The utility model relates to the technical field of construction devices, and discloses a jet grouting pile construction device in deep foundation pit engineering, which comprises a movable chassis, one side of the top of the movable chassis is rotatably connected with a mounting plate, one side of the mounting plate is provided with a pressurizing assembly, the top of the pressurizing assembly is provided with a connecting rod, and the connecting rod is connected with the movable chassis. A power head is mounted at the bottom of the connecting rod, a drill bit is mounted at the bottom of the power head, a lengthening rod is arranged at the top of the connecting rod, a cavity is formed in the lengthening rod, a connecting assembly is arranged on the inner side wall of the cavity, and the pressurizing assembly comprises a mounting shell fixedly connected to one side of the mounting plate; and a through groove matched with the connecting rod is formed in the top of the mounting shell. According to the jet grouting pile construction device in the deep foundation pit engineering, through cooperation of the motor, the gear and the rack in the pressurizing assembly, the drilling rod can be flexibly pressurized, the drilling requirements under different geological conditions are met, and the drilling efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of construction equipment technology, and in particular to a jet grouting pile construction device for deep foundation pit engineering. Background Technology

[0002] Jet grouting piles, as a core technology for foundation reinforcement and water-stopping in deep foundation pit engineering, are widely used due to their unique advantages. Jet grouting piles use high-pressure jet grout to thoroughly mix and solidify the grout with the soil, forming a pile structure with certain strength and impermeability. This type of pile not only effectively improves the bearing capacity of the foundation and controls soil deformation, but also constructs a reliable water-stop curtain around the foundation pit, preventing groundwater leakage and ensuring a dry and safe construction environment inside the pit.

[0003] However, existing jet grouting pile construction devices for deep foundation pit engineering have the following disadvantages:

[0004] (1) The pressurization method relies on the equipment's own weight or a simple hydraulic system, making it difficult to dynamically adjust the pressure according to the hardness of the formation, resulting in low drilling efficiency in hard formations and even problems such as stuck drill and off-center drilling.

[0005] (2) When deep hole construction is required, the extension connection of the drill rod usually relies on manual alignment and bolt fixing, which is cumbersome and time-consuming, seriously affecting the construction progress.

[0006] Therefore, this utility model provides a jet grouting pile construction device for deep foundation pit engineering. Utility Model Content

[0007] (a) Technical problems to be solved

[0008] The technical problem solved by the utility model is to provide a jet grouting pile construction device for deep foundation pit engineering that is highly practical, easy to operate, and has a relatively simple structure. It solves the problems mentioned in the background art, such as the difficulty in dynamically adjusting the pressure according to the hardness of the stratum and the fact that the extension connection of the drill rod usually relies on manual alignment and bolt fixing, which is cumbersome and time-consuming.

[0009] (II) Technical Solution

[0010] To achieve the above objectives, this utility model provides the following technical solution: a jet grouting pile construction device for deep foundation pit engineering, comprising a mobile chassis, an installation plate rotatably connected to one side of the top of the mobile chassis, a pressure assembly provided on one side of the installation plate, a connecting rod provided at the top of the pressure assembly, a power head installed at the bottom of the connecting rod, a drill bit installed at the bottom of the power head, an extension rod provided at the top of the connecting rod, a cavity opened inside the extension rod, and a connecting assembly provided on the inner side wall of the cavity;

[0011] The pressurization assembly includes a mounting shell fixedly connected to one side of the mounting plate. The top of the mounting shell has a through groove adapted to the connecting rod. A motor is installed on the inner side wall of the mounting shell. The output end of the motor is splinedly connected to a transmission rod. A gear is sleeved on the surface of the transmission rod. A groove is opened on the surface of the connecting rod. A rack is installed on the inner side wall of the groove. The gear and the rack are adapted to each other.

[0012] The connecting assembly includes a rotating rod rotatably connected to the inner wall of the cavity, a cam sleeved on the surface of the rotating rod, a movable plate movably connected to the inner wall of the cavity, one side of the movable plate contacting the surface of the cam, and a spring connecting the other side of the movable plate and the inner wall of the cavity, a locking block fixedly connected to one side of the movable plate, a positioning block fixedly connected to the top of the connecting rod, a positioning groove adapted to the positioning block at the bottom of the extension rod, and a locking groove adapted to the locking block on one side of the positioning block.

[0013] Optionally, a slurry storage tank is fixedly connected to the top of the mobile chassis, and a high-pressure grouting pump is installed on the top of the slurry storage tank. The integrated design shortens the slurry transportation path and reduces energy loss and leakage risk.

[0014] Optionally, an output pipe is installed on the top of the high-pressure grouting pump, and a jet nozzle is fixedly connected to one end of the output pipe. The jet nozzle is installed at the front end of the drill bit, which improves the stability and reliability of construction and helps to improve the construction quality and efficiency of jet grouting piles.

[0015] Optionally, adjustable support legs are fixedly connected to both sides of the mobile chassis, and a support plate is fixedly connected to the bottom of the adjustable support legs, which effectively reduces the shaking and displacement of the equipment during operation and reduces the wear and tear on the equipment components caused by vibration.

[0016] Optionally, a limiting rod is fixedly connected to the inner wall of the cavity, and a circular hole adapted to the limiting rod is provided on the other side of the movable plate, which effectively prevents the movable plate from shifting or getting stuck during movement.

[0017] Optionally, the top of the connecting rod and the bottom of the extension rod are both provided with shock-absorbing pads. The shock-absorbing pads are made of rubber, which provides good shock absorption and buffering function for the drill rod system.

[0018] (III) Beneficial Effects

[0019] This utility model provides a jet grouting pile construction device for deep foundation pit engineering, which has the following beneficial effects:

[0020] 1. In this deep foundation pit project, the jet grouting pile construction device, through the cooperation of the motor, gear and rack in the pressurization component, can flexibly pressurize the drill rod, adapt to the drilling needs under different geological conditions, and improve drilling efficiency.

[0021] 2. In this deep foundation pit project, the jet grouting pile construction device, through the design of the connecting components such as the rotating rod, cam, movable plate, spring, locking block and positioning block, makes the extension operation of the drill rod simple and convenient, saves construction time and improves work efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the mobile chassis structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the mounting shell structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the extended rod structure of this utility model.

[0026] In the diagram: 1. Mobile chassis; 101. Mounting plate; 102. Connecting rod; 103. Power head; 104. Drill bit; 105. Extension rod; 2. Pressurization assembly; 201. Mounting shell; 202. Motor; 203. Gear; 204. Rack; 3. Connecting assembly; 301. Positioning block; 302. Rotating rod; 303. Cam; 304. Movable plate; 305. Spring; 306. Locking block; 4. Slurry storage tank; 5. High-pressure grouting pump; 6. Spray nozzle; 7. Adjustable outriggers; 8. Support plate; 9. Limiting rod; 10. Shock-absorbing pad. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0028] Please see Figures 1 to 4 This utility model provides a technical solution: a jet grouting pile construction device for deep foundation pit engineering, including a mobile chassis 1, an installation plate 101 rotatably connected to one side of the top of the mobile chassis 1, a pressure component 2 provided on one side of the installation plate 101, a connecting rod 102 provided on the top of the pressure component 2, a power head 103 installed at the bottom of the connecting rod 102, a drill bit 104 installed at the bottom of the power head 103, an extension rod 105 provided on the top of the connecting rod 102, a cavity opened inside the extension rod 105, and a connecting component 3 provided on the inner side wall of the cavity;

[0029] The pressurizing assembly 2 includes a mounting shell 201 fixedly connected to one side of the mounting plate 101, effectively protecting the internal components from external dust, debris, and humid environments. The top of the mounting shell 201 has a through groove adapted to the connecting rod 102. A motor 202 is installed on the inner side wall of the mounting shell 201 to precisely adjust the pressurizing speed and force of the connecting rod 102. The output end of the motor 202 is splined connected to a transmission rod. A gear 203 is sleeved on the surface of the transmission rod. A groove is opened on the surface of the connecting rod 102. A rack 204 is installed on the inner side wall of the groove. The gear 203 and the rack 204 are adapted to each other. A YE3 series three-phase asynchronous motor 202 is selected, with a rated power of 30kW and a speed adjustment range of 0~1500r / min. The gear 203 has a module of 5 and 30 teeth. The module of the rack 204 matches the gear. The effective length of the rack is 1500mm and the number of teeth is 20.

[0030] The connecting assembly 3 includes a rotating rod 302 rotatably connected to the inner wall of the cavity. A cam 303 is fitted onto the surface of the rotating rod 302. A movable plate 304 is movably connected to the inner wall of the cavity. One side of the movable plate 304 contacts the surface of the cam 303, and a spring 305 is connected between the other side of the movable plate 304 and the inner wall of the cavity. A locking block 306 is fixedly connected to one side of the movable plate 304. The tight fit between the locking block 306 and the locking slot, as well as the continuous preload provided by the spring 305, ensures the connection of the part. Even under high-pressure spraying and severe vibration construction environments, it can maintain stability and reliability. The top of the connecting rod 102 is fixedly connected to the positioning block 301. The bottom of the extension rod 105 is provided with a positioning groove that matches the positioning block 301. One side of the positioning block 301 is provided with a slot that matches the locking block 306. The cylindrical helical compression spring 305 has an elastic coefficient k=500N / m, a pre-compression amount of 10mm, and a maximum allowable compression amount of 30mm, ensuring that the locking force between the locking block 306 and the slot is not less than 500N.

[0031] A slurry storage tank 4 is fixedly connected to the top of the mobile chassis 1. A high-pressure grouting pump 5 is installed on the top of the slurry storage tank 4. The integrated design shortens the slurry transportation path and reduces energy loss and leakage risk.

[0032] The top of the high-pressure grouting pump 5 is equipped with an output pipe, and one end of the output pipe is fixedly connected to a jet nozzle 6. The jet nozzle 6 is installed at the front end of the drill bit 104, which improves the stability and reliability of construction and helps to improve the construction quality and efficiency of jet grouting piles.

[0033] Adjustable support legs 7 are fixedly connected to both sides of the mobile chassis 1, and support plates 8 are fixedly connected to the bottom of the adjustable support legs 7, which effectively reduces the shaking and displacement of the equipment during operation and reduces the wear and tear on the equipment components caused by vibration.

[0034] A limiting rod 9 is fixedly connected to the inner wall of the cavity, and a round hole adapted to the limiting rod 9 is provided on the other side of the movable plate 304, which effectively prevents the movable plate 304 from shifting or getting stuck during movement.

[0035] The top of the connecting rod 102 and the bottom of the extension rod 105 are both provided with shock-absorbing pads 10. The shock-absorbing pads 10 are made of rubber, which provides good shock absorption and buffering function for the drill rod system.

[0036] In this invention, the working steps of the device are as follows:

[0037] First step: The pressure component 2 on one side of the mounting plate 101 works, the motor 202 starts, and the transmission rod connected by the spline at its output end drives the gear 203 to rotate. Since the gear 203 is matched with the rack 204 in the groove on the surface of the connecting rod 102, the rotation of the gear 203 can make the connecting rod 102 move up and down in the through groove of the mounting shell 201, thereby pressurizing the connecting rod 102, the power head 103 and the drill bit 104, so that they can drill into the ground.

[0038] The second step: When it is necessary to extend the drill rod, connect the extension rod 105 to the connecting rod 102, insert the positioning block 301 into the positioning groove at the bottom of the extension rod 105, and then rotate the rotating rod 302. The rotating rod 302 drives the cam 303 to rotate, and the cam 303 presses the movable plate 304, causing the movable plate 304 to move towards the positioning block 301 against the elastic force of the spring 305. The locking block 306 on one side of the movable plate 304 is inserted into the locking groove on one side of the positioning block 301, thereby realizing the fixed connection between the extension rod 105 and the connecting rod 102. It should be noted that the device structure and drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0039] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A jet grouting pile construction device for deep foundation pit engineering, comprising a mobile chassis (1), characterized in that: A mounting plate (101) is rotatably connected to one side of the top of the mobile chassis (1). A pressure assembly (2) is provided on one side of the mounting plate (101). A connecting rod (102) is provided on the top of the pressure assembly (2). A power head (103) is installed at the bottom of the connecting rod (102). A drill bit (104) is installed at the bottom of the power head (103). An extension rod (105) is provided on the top of the connecting rod (102). A cavity is opened inside the extension rod (105). A connecting assembly (3) is provided on the inner side wall of the cavity. The pressurizing assembly (2) includes a mounting shell (201) fixedly connected to one side of the mounting plate (101). The top of the mounting shell (201) is provided with a through groove that is adapted to the connecting rod (102). A motor (202) is installed on the inner side wall of the mounting shell (201). A transmission rod is splined to the output end of the motor (202). A gear (203) is sleeved on the surface of the transmission rod. A groove is provided on the surface of the connecting rod (102). A rack (204) is installed on the inner side wall of the groove. The gear (203) is adapted to the rack (204). The connecting assembly (3) includes a rotating rod (302) rotatably connected to the inner wall of the cavity. A cam (303) is sleeved on the surface of the rotating rod (302). A movable plate (304) is movably connected to the inner wall of the cavity. One side of the movable plate (304) is in contact with the surface of the cam (303). A spring (305) is connected between the other side of the movable plate (304) and the inner wall of the cavity. A locking block (306) is fixedly connected to one side of the movable plate (304). A positioning block (301) is fixedly connected to the top of the connecting rod (102). A positioning groove adapted to the positioning block (301) is opened at the bottom of the extension rod (105). A locking groove adapted to the locking block (306) is opened on one side of the positioning block (301).

2. The jet grouting pile construction device for deep foundation pit engineering according to claim 1, characterized in that: The top of the mobile chassis (1) is fixedly connected to a slurry storage tank (4), and a high-pressure grouting pump (5) is installed on the top of the slurry storage tank (4).

3. The jet grouting pile construction device for deep foundation pit engineering according to claim 2, characterized in that: The high-pressure grouting pump (5) is equipped with an output pipe at its top, and a nozzle (6) is fixedly connected to one end of the output pipe. The nozzle (6) is installed at the front end of the drill bit (104).

4. The jet grouting pile construction device for deep foundation pit engineering according to claim 1, characterized in that: The mobile chassis (1) is fixedly connected to two sides with adjustable legs (7), and the bottom of the adjustable legs (7) is fixedly connected to a support plate (8).

5. The jet grouting pile construction device for deep foundation pit engineering according to claim 1, characterized in that: A limiting rod (9) is fixedly connected to the inner wall of the cavity, and a circular hole adapted to the limiting rod (9) is provided on the other side of the movable plate (304).

6. The jet grouting pile construction device for deep foundation pit engineering according to claim 1, characterized in that: The top of the connecting rod (102) and the bottom of the extension rod (105) are provided with a shock-absorbing pad (10), and the shock-absorbing pad (10) is made of rubber.

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