Construction device for high-pressure jet grouting pile

Abstract

The application discloses a construction device for high-pressure jet grouting piles and relates to the technical field of foundation treatment of building engineering, which comprises a base, a vertical pipe, a positioning mechanism, a rotating platform and a moving platform. The device can fully utilize terrain conditions, can quickly complete erection of a jet grouting drilling machine construction platform by means of a steel casing, does not damage a cofferdam structure surrounded by the steel casing, reduces construction cost and guarantees construction quality.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of building engineering foundation treatment, and particularly relates to a construction device for high-pressure rotary jet grouting pile. BACKGROUND

[0002] High-pressure rotary jet grouting pile is formed by drilling a grouting pipe with a nozzle into a soil layer to a predetermined depth, and then jetting slurry or water from the nozzle at a pressure of 20-40 MPa to form a jet flow to impact and destroy the soil layer, and finally form a consolidated body with a certain strength in the soil layer, which is the rotary jet grouting pile. The existing drilling construction platform device is realized by means of an engineering vehicle or a special mobile platform to erect and move the rotary jet grouting machine, but this method is not suitable for scenarios with cofferdam structures, such as cofferdams surrounded by drilling steel casings, because in this working condition, the cofferdam is deep, and the above-mentioned construction platform is not easy to move down, and because the cofferdam contains a large amount of water, the above-mentioned construction platform using an engineering vehicle cannot achieve stable drilling. SUMMARY

[0003] The present application aims to provide a construction device for high-pressure rotary jet grouting pile to solve the above-mentioned defects in the prior art.

[0004] A construction device for high-pressure rotary jet grouting pile, comprising a base, a vertical pipe, a positioning mechanism, a rotating platform, and a mobile platform, the vertical pipe is integrally formed at the geometric center of the base, one of the bases is sleeved on the upper end of one of the steel casings and is locked and positioned by means of the positioning mechanism provided at the lower end of the base, the rotating platform is installed on the outer periphery of the vertical pipe and has a stud provided at its upper end for installing the mobile platform, the two ends of one of the mobile platforms are respectively installed on the studs at the upper ends of the two rotating platforms, and the rotary jet grouting machine is erected between the two mobile platforms.

[0005] Preferably, the lower end of the base is provided with a tubular positioning seat sleeved on the upper end of the steel casing;

[0006] The positioning mechanism comprises a sliding seat, a sliding rod, a wedge-shaped block, a screw rod, and a top block, the sliding seat is at least three and is fixed circumferentially on the inner wall of the positioning seat, the sliding rod is slidingly connected in the guide hole in the sliding seat and can extend to the outside of the positioning seat, the inner end of the sliding rod is fixed with the wedge-shaped block, the screw rod is threadedly connected in the fixing sleeve provided in the vertical pipe, the lower end of the screw rod is connected to the top block matched with the wedge-shaped block, and the upper end of the screw rod is provided with an internal hexagonal groove.

[0007] Preferably, the rotating platform comprises a rotating seat, a gear ring, a gear, and a servo motor, the rotating seat is rotatably connected to the vertical pipe by means of a bearing, the upper end of the rotating seat is open and the lower end thereof is provided with the gear ring which is installed on the outer periphery thereof, the gear ring is engaged with the gear, the gear is connected to the output end of the servo motor, the servo motor is installed at the lower end of the base, and the stud is fixed on the upper end of the rotating seat.

[0008] Preferably, the movable platform includes a base plate and a screw slide. Both ends of the base plate are provided with long holes that cooperate with the studs. After the studs pass through the long holes on the base plate, they are locked with the help of nuts. The screw slide is installed along the length direction of the base plate and is located on one side of the long holes.

[0009] Preferably, the upper end height of the rotating seat is not less than the upper end height of the vertical pipe.

[0010] Preferably, an anti-slip groove is provided at the outer end of the slide rod.

[0011] Preferably, the servo motor is located on the inner ring of the positioning seat.

[0012] The advantages of the present invention are:

[0013] 1. The present invention can make full use of the terrain conditions and can quickly complete the erection of the jet grouting drilling rig construction platform with the help of the steel casing without destroying the cofferdam structure surrounded by the drill steel casing, thereby reducing the construction cost and ensuring the construction quality.

[0014] 2. In the present invention, the position and angle of both ends of the mobile platform can be adjusted according to specific working conditions by means of the rotating platform, so that the two mobile platforms can remain parallel to each other, which is beneficial to the installation of the jet grouting drill. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0017] Figure 3 This is a top view of a single base connected to a drilled steel casing in the present invention.

[0018] Figure 4 for Figure 3 Cross-sectional view along direction BB.

[0019] Figure 5 、 Figure 6 Schematic diagrams of a single base and its accessories from different perspectives.

[0020] Among them: 1 base, 10 positioning seat, 2 vertical tube, 20 fixed sleeve, 3 positioning mechanism, 30 slide, 31 slide rod, 32 wedge block, 33 screw, 34 top block, 35 anti-slip groove, 36 hexagonal slot, 4 rotating platform, 40 rotating seat, 41 ring gear, 42 gear, 43 servo motor, 44 stud, 5 mobile platform, 50 bottom plate, 51 screw slide, 52 long hole, 6 drill steel casing. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figures 1 to 6 As shown, a construction device for high-pressure rotary jet grouting piles includes a base 1, a vertical pipe 2, a positioning mechanism 3, a rotating platform 4 and a mobile platform 5. The vertical pipe 2 is integrally formed at the geometric center of the base 1. One of the bases 1 is sleeved on the upper end of one of the steel casings and is locked in position by means of the positioning mechanism 3 provided at the lower end of the base 1. The rotating platform 4 is installed on the outer periphery of the vertical pipe 2 and a stud 44 for installing the mobile platform 5 is provided at its upper end. The two ends of one mobile platform 5 are respectively installed on the studs 44 at the upper ends of two rotating platforms 4. The space between the two mobile platforms 5 is used to set up a rotary jet grouting drilling rig.

[0023] In this embodiment, the lower end of the base 1 is provided with a tubular positioning seat 10 which is sleeved on the upper end of the steel casing;

[0024] The positioning mechanism 3 includes a slide 30, a slide rod 31, a wedge block 32, a screw 33, and a top block 34. The slides 30 are at least three in number and are circumferentially fixed to the inner wall of the positioning seat 10. The slide rods 31 are slidably connected to the guide holes in the slide 30 and can extend to the outside of the positioning seat 10. The wedge block 32 is fixed to the inner end of the slide rod 31, and the outer end of the slide rod 31 is provided with an anti-slip groove 35. The screw 33 is threadedly connected to the fixing sleeve 20 provided in the vertical pipe 2. The lower end of the screw 33 is connected to the top block 34 that cooperates with the wedge block 32, and the upper end of the screw 33 is provided with a hexagonal inner groove 36. The positioning method is as follows:

[0025] The screw rod 33 is rotated, and the screw rod 33 moves downward and pushes the multiple slide rods 31 outward with the help of the top block 34 until they contact and press against the inner wall of the drill steel casing 6, thereby completing the positioning.

[0026] In this embodiment, the rotating platform 4 includes a rotating base 40, a ring gear 41, a gear 42 and a servo motor 43. The rotating base 40 is rotatably connected to the vertical tube 2 by means of a bearing, and the upper end height of the rotating base 40 is not less than the upper end height of the vertical tube 2. The upper end of the rotating base 40 is open and the outer periphery of its lower end is installed with the ring gear 41, the ring gear 41 is engaged with the gear 42, and the gear 42 is connected to the output end of the servo motor 43. The servo motor 43 is installed at the lower end of the base 1. The stud 44 is fixed to the upper end of the rotating base 40, wherein the servo motor 43 is located on the inner ring of the positioning base 10.

[0027] In the embodiment, the moving platform 5 comprises a base plate 50 and a screw slide 51, the base plate 50 is provided with a long hole 52 matched with the stud 44 at both ends, and the stud 44 is locked by a nut after passing through the long hole 52 on the base plate 50, the screw slide 51 is installed along the length direction of the base plate 50 and located at one side of the long hole 52.

[0028] The erecting method of the construction device is as follows:

[0029] First, four bases 1 are sleeved on the drilled steel casings 6 at four corners of the cofferdam, and are locked and positioned by the positioning mechanism 3, then the servo motor 43 is started, the servo motor 43 drives the gear 42 to rotate the gear ring 41 and the rotating seat 40, and then the position of the stud 44 is adjusted, after adjustment, the base plate 50 in the moving platform 5 is placed on the rotating seat 40 and passes through the stud 44 by the long hole 52, then the base plate 50 is locked by the nut, then another moving platform 5 is installed by the method, finally, the two moving platforms 5 need to be kept parallel, and finally the rotary jet drilling machine is installed between the two moving platforms 5.

[0030] Specifically, the rotary jet drilling machine can be installed on another linear moving mechanism perpendicular to the screw slide 51 in the construction device, and the linear moving mechanism is erected on the screw slide 51 in the construction device, so that the rotary jet drilling machine can be moved and drilled at any position. The linear moving mechanism can also adopt the structure of the screw slide 51.

[0031] It is known from common technical knowledge that the present application can be realized by other embodiments without departing from the spirit or essential characteristics thereof. Therefore, the above disclosed embodiments are only examples and are not the only ones. All changes within the scope of the present application or within the scope equivalent to the present application are included in the present application.

Claims

1. A construction device for high-pressure jet grouting piles, characterized in that: The utility model comprises a base (1), a vertical pipe (2), a positioning mechanism (3), a rotating platform (4) and a mobile platform (5), wherein the vertical pipe (2) is integrally formed at the geometric center of the base (1), one of the bases (1) is sleeved on the upper end of one of the steel casings and is locked and positioned by means of a positioning mechanism (3) provided at the lower end of the base (1), the rotating platform (4) is installed on the outer periphery of the vertical pipe (2) and a stud (44) for installing the mobile platform (5) is provided at its upper end, the two ends of one mobile platform (5) are respectively installed on the studs (44) at the upper ends of the two rotating platforms (4), and a rotary jet drilling rig is set between the two mobile platforms (5); First, four bases (1) are sleeved on the drill steel casings (6) located at the four corners of the cofferdam, and the two mobile platforms (5) are kept parallel to each other. The jet drilling rig is installed on another linear moving mechanism that is perpendicular to the screw slide (51) in the construction device.

2. A construction device for high-pressure jet grouting piles according to claim 1, characterized in that: The lower end of the base (1) is provided with a tubular positioning seat (10) which is sleeved on the upper end of the steel casing; The positioning mechanism (3) includes a slide (30), a slide rod (31), a wedge block (32), a screw rod (33) and a top block (34). The slide rod (30) has at least three and is circumferentially fixed on the inner wall of the positioning seat (10). The slide rod (31) is slidably connected to the guide hole in the slide rod (30) and can extend to the outside of the positioning seat (10). The inner end of the slide rod (31) is fixed with the wedge block (32). The screw rod (33) is threadedly connected to the fixing sleeve (20) provided in the vertical pipe (2). The lower end of the screw rod (33) is connected to the top block (34) matched with the wedge block (32). The upper end of the screw rod (33) is provided with an inner hexagonal groove (36).

3. A construction device for high-pressure jet grouting piles according to claim 1, characterized in that: The rotating platform (4) includes a rotating base (40), a gear ring (41), a gear (42) and a servo motor (43). The rotating base (40) is rotatably connected to the vertical pipe (2) by means of a bearing. The upper end of the rotating base (40) is open and the gear ring (41) is installed on the outer periphery of the lower end. The gear ring (41) is engaged with the gear (42). The gear (42) is connected to the output end of the servo motor (43). The servo motor (43) is installed at the lower end of the base (1). The stud (44) is fixed to the upper end of the rotating base (40).

4. A construction device for high-pressure jet grouting piles according to claim 1, characterized in that: The movable platform (5) includes a base plate (50) and a screw slide (51). Both ends of the base plate (50) are provided with elongated holes (52) that match the studs (44). The studs (44) are locked with the help of nuts after passing through the elongated holes (52) on the base plate (50). The screw slide (51) is installed along the length direction of the base plate (50) and is located on one side of the elongated holes (52).

5. A construction device for high-pressure jet grouting piles according to claim 3, characterized in that: The height of the upper end of the rotating seat (40) is not less than the height of the upper end of the vertical pipe (2).

6. A construction device for high-pressure jet grouting piles according to claim 2, characterized in that: The outer end of the slide rod (31) is provided with an anti-slip groove (35).

7. A construction device for high-pressure jet grouting piles according to claim 3, characterized in that: The servo motor (43) is located on the inner circle of the positioning seat (10).

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