A shaped steel casing for cast-in-place piles in over-excavation sites

Abstract

The present invention discloses a steel casing for shaping cast-in-place piles in over-excavation sites, including a casing, a sleeve is slidably sleeved on the outside of the casing, a plurality of sliders are fixedly connected to the inner wall of the sleeve, a slide groove corresponding to the slider is provided on the outer wall of the casing, a screw is rotatably connected in the slide groove, a threaded opening corresponding to the screw is provided on the slider, a slide rod is fixedly connected in the slide groove, and a slide opening corresponding to the slide rod is provided on the slider. In the present invention, by setting the steel casing, when the cast-in-place pile is bored and concrete is poured at last, it is not necessary to pour a part first and then build a brick membrane to increase the height for pouring another part, which can ensure one-time forming, enhance the quality of the cast-in-place pile, and speed up the construction progress.

Description

Technical Field

[0001] The invention relates to a shaped steel casing for an over-excavation site cast-in-place pile, belonging to the technical field of construction engineering pile construction. Background Art

[0002] With the development and growth of China's construction market, the speed of construction is getting faster and faster. There are many high-turnover construction models. Due to the tight construction period, over-excavation of earthwork often occurs. After over-excavation of earthwork, the cast-in-place piles will have problems with connecting piles due to insufficient effective pile length. The traditional model is to use brick membrane to protect the wall, but the construction speed is slow, which greatly affects the progress. Summary of the invention

[0003] The purpose of the present invention is to provide a shaped steel casing for cast-in-place piles in an over-excavation site which is easy to operate, saves construction costs and can improve construction efficiency, so as to overcome the shortcomings of the prior art.

[0004] The cam is provided with a plurality of sliding blocks, the outer wall of the cam is provided with a sliding groove corresponding to the sliding block, the sliding groove is rotatably connected with a screw, the sliding block is provided with a threaded opening corresponding to the screw, the sliding groove is fixedly connected with a sliding rod, the sliding groove is provided with a sliding opening corresponding to the sliding rod, the bottom of the cam is provided with a cavity, one end of the screw passes through the inner wall of the sliding groove and extends into the cavity, one end of the extended screw is fixedly connected with a first gear, the cavity is provided with a second gear meshing with the first gear, the second gear and the inner wall of the cavity are rotated by a rotating rod, one end of the rotating rod passes through the inner wall of the cavity and is fixedly connected with a knob, one end of the knob is slidably inserted with a clamping rod, and a plurality of clamping grooves corresponding to the clamping rod are arranged around the outer wall of the cam.

[0005] Preferably, a plurality of balls are slidably connected in the sliding opening, and the edges of the balls are in contact with the sliding rod.

[0006] Preferably, a support sleeve is rotatably sleeved on the rotating rod, and one side of the support sleeve abuts against the inner wall of the cavity.

[0007] Preferably, one end of the clamping rod close to the casing is fixedly sleeved with a clamping sleeve, and one end of the clamping rod away from the clamping sleeve is fixedly connected with a pull rod.

[0008] Preferably, a spring is sleeved on the clamping rod, and two ends of the spring are fixedly connected to the knob and the pull rod respectively.

[0009] Preferably, a plurality of wedge-shaped reinforcement plates are fixedly connected to the outer wall of the sheath.

[0010] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0011] 1. In the present invention, by setting the steel casing, when the bored pile is completed and the concrete is poured, it is not necessary to pour a part first and then build a brick membrane to increase the height for pouring another part, which can ensure one-time forming, enhance the quality of the bored pile, and speed up the construction progress;

[0012] 2. At the same time, the knob can be turned to drive the screw to rotate through the meshing action between the first gear and the second gear, so that the height of the sleeve can be adjusted through the slider. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention;

[0014] Figure 2 It is a schematic diagram of the side view structure of the screw;

[0015] Figure 3 for Figure 2 Schematic diagram of the structure at point A.

[0016] Explanation of the accompanying drawings: 1-casing, 2-sheath, 3-slider, 4-screw, 5-sliding rod, 6-first gear, 7-second gear, 8-rotating rod, 9-knob, 10-clamping rod, 11-ball, 12-support sleeve, 13-clamping sleeve, 14-pull rod, 15-spring, 16-wedge-shaped reinforcement plate. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiments of the present invention: Please refer to Figures 1 to 3A steel casing for forming over-excavated cast-in-place piles includes a casing 1, an outer sliding sleeve of the casing 1 is connected with a casing 2 for preventing the casing 1 from deforming, a plurality of sliders 3 are fixedly connected to the inner wall of the casing 2 for supporting the casing 2, a sliding groove corresponding to the slider 3 is provided on the outer wall of the casing 1, a screw rod 4 is rotatably connected in the sliding groove for driving the slider 3 to move up and down, a threaded opening corresponding to the screw 4 is provided on the slider 3, a sliding rod 5 is fixedly connected in the sliding groove for supporting the slider 4, a sliding opening corresponding to the sliding rod 5 is provided on the slider 4, a cavity is provided at the bottom of the casing 1, and one end of the screw rod 4 passes through the inner wall of the sliding groove and extends into the cavity. One end of the extended screw rod 4 is fixedly sleeved with a first gear 6 for driving the screw rod 4 to rotate. A second gear 7 meshing with the first gear 6 is provided in the cavity for driving the first gear 6 to rotate. The second gear 7 and the inner wall of the cavity are rotated through a rotating rod 8. One end of the rotating rod 8 passes through the inner wall of the cavity and is fixedly connected with a knob 9 for driving the rotating rod 8 to rotate. A clamping rod 10 is slidably inserted at one end of the knob 9 for fixing the knob 9. A plurality of clamping grooves corresponding to the clamping rod 10 are arranged around the outer wall of the casing 1. A plurality of balls 11 are slidably connected in the sliding mouth, and the edges of the balls 11 are in contact with the sliding rod 5 to reduce the friction between the sliding rod 5 and the inner wall of the sliding mouth. A support sleeve 12 is rotatably sleeved on the rotating rod 8, and one side of the support sleeve 12 abuts against the inner wall of the cavity to prevent the rotating rod 8 from shaking. A clamping sleeve 13 is fixedly sleeved on the end of the clamping rod 10 close to the casing 1, and a pull rod 14 is fixedly connected to the end of the clamping rod 10 away from the clamping sleeve 13. A spring 15 is sleeved on the clamping rod 10, and the two ends of the spring 15 are respectively fixedly connected to the knob 9 and the pull rod 14, which is used to provide a certain elastic support for the clamping rod 10. A plurality of wedge-shaped reinforcement plates 16 are fixedly connected to the outer wall of the sheath 2 to enhance the stability of the sheath 2.

[0019] In this embodiment, through the provision of a steel casing, when the bored pile is completed and the concrete is finally poured, there is no need to first pour a part and then build a brick membrane to raise it for pouring another part as before. This ensures one-time forming, enhances the quality of the bored pile, and speeds up the construction progress. At the same time, by turning the knob 9, the screw 4 is driven to rotate through the meshing action between the first gear 6 and the second gear 7, thereby adjusting the height of the sleeve 2 through the slider 3.

Claims

1. A steel casing for over-excavated cast-in-place piles, comprising a casing (1), characterized in that: The outer part of the casing (1) is slidably sleeved with a casing (2), a plurality of sliders (3) are fixedly connected to the inner wall of the casing (2), a sliding groove corresponding to the slider (3) is provided on the outer wall of the casing (1), a screw rod (4) is rotatably connected in the sliding groove, the slider (3) is provided with a threaded opening corresponding to the screw rod (4), a sliding rod (5) is fixedly connected in the sliding groove, the slider (3) is provided with a sliding opening corresponding to the sliding rod (5), a cavity is provided at the bottom of the casing (1), one end of the screw rod (4) is provided with a screw threaded opening corresponding to the screw rod (4), The screw rod (4) extends through the inner wall of the slide groove and into the cavity. One end of the extended screw rod (4) is fixedly sleeved with a first gear (6). A second gear (7) meshing with the first gear (6) is provided in the cavity. The second gear (7) and the inner wall of the cavity are rotated by a rotating rod (8). One end of the rotating rod (8) passes through the inner wall of the cavity and is fixedly connected with a knob (9). One end of the knob (9) is slidably inserted with a clamping rod (10). A plurality of clamping grooves corresponding to the clamping rod (10) are arranged around the outer wall of the casing (1).

2. The shaped steel casing for over-excavation cast-in-place piles according to claim 1 is characterized by: A plurality of balls (11) are slidably connected in the sliding opening, and the edges of the balls (11) are in contact with the sliding rod (5).

3. The shaped steel casing for over-excavation cast-in-place piles according to claim 1 is characterized by: A support sleeve (12) is rotatably sleeved on the rotating rod (8), and one side of the support sleeve (12) abuts against the inner wall of the cavity.

4. The shaped steel casing for over-excavation cast-in-place piles according to claim 1 is characterized by: One end of the clamping rod (10) close to the casing (1) is fixedly sleeved with a clamping sleeve (13), and one end of the clamping rod (10) away from the clamping sleeve (13) is fixedly connected with a pull rod (14).

5. The shaped steel casing for over-excavation cast-in-place piles according to claim 1 is characterized by: A spring (15) is sleeved on the clamping rod (10), and two ends of the spring (15) are respectively fixedly connected to the knob (9) and the pull rod (14).

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