Cast-in-place pile pore-forming perpendicularity detection device
By designing a verticality detection device for cast-in-place piles that combines a suspended outer cage and a vertical self-balancing cage with a gravity balance hammer and a laser line projector, the problem of difficult verticality detection for cast-in-place piles has been solved, and accurate verticality detection and hole quality control have been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GANSU NO 1 CONSTR ENG GRP
- Filing Date
- 2025-06-30
- Publication Date
- 2026-05-26
AI Technical Summary
The lack of effective verticality testing devices for cast-in-place piles in the existing technology makes it difficult to guarantee the quality of hole formation, especially when the equipment is aging or the hole is dug manually, making verticality control more difficult.
A verticality detection device for cast-in-place piles was designed. It adopts a suspended outer cage and a vertical self-balancing cage, which is equipped with a gravity balance hammer and a laser line projector. It uses the earth's gravity to achieve self-balancing and ensures that the laser line projector is always vertical. The verticality deviation is detected by projecting cross lines with a laser.
It enables precise verticality detection of cast-in-place pile holes under different construction conditions, ensuring that the quality of the pile holes meets the design requirements, and is suitable for manual or mechanical hole formation.
Smart Images
Figure CN224281391U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of building construction technology, and specifically relates to a device for detecting the verticality of cast-in-place pile holes. Background Technology
[0002] Cast-in-place pile foundations, as a type of foundation, are widely used in industrial and civil construction, bridges, and other engineering fields. Depending on the geological conditions, the drilling of cast-in-place piles is mostly carried out by manual excavation or mechanical drilling. Since cast-in-place piles are the key carriers bearing the load of the superstructure, their verticality deviation has a significant impact on the bearing capacity. Moreover, the drilling of cast-in-place piles is a type of underground excavation, making verticality control relatively difficult. Timely inspection and control are necessary to ensure that the verticality meets the design and specification requirements.
[0003] Currently, there is no equipment on the market that can be used to test the verticality of cast-in-place piles. During mechanical drilling, the verticality of the pile hole can be controlled within a certain range using the leveling device built into the drilling equipment. However, as the equipment ages, the deviation of the leveling device gradually increases, affecting the quality of the pile hole. Manual excavation relies on experience, and verticality deviation can be controlled in shallower pile hole construction. Therefore, there is an urgent need for a simple and highly accurate pile hole verticality testing device to inspect the pile hole during the drilling process to ensure the quality of cast-in-place pile drilling. Utility Model Content
[0004] The purpose of this invention is to provide a device for detecting the verticality of cast-in-place piles, so as to solve the problem of difficulty in detecting the verticality of cast-in-place piles.
[0005] The technical solution of this utility model is: a verticality detection device for cast-in-place piles, including a suspended outer cage and a vertical self-balancing cage. The vertical self-balancing cage is connected to the center of the suspended outer cage. A gravity balance hammer is provided inside the vertical self-balancing cage. A laser line projector is provided on the upper surface of the gravity balance hammer. The bottom of the gravity balance hammer is higher than the bottom of the suspended outer cage.
[0006] As a further improvement of this utility model, the vertical self-balancing cage is composed of a load-bearing support, a self-balancing support, and a gravity balance hammer bracket, which are freely suspended from top to bottom. The load-bearing support and the self-balancing support are suspended at two points, and the self-balancing support and the gravity balance hammer bracket are suspended at two points. The line connecting the suspension points of the load-bearing support and the self-balancing support is perpendicular to the line connecting the suspension points of the self-balancing support and the gravity balance hammer bracket.
[0007] As a further improvement of this utility model, the gravity balance hammer is inverted cone shape.
[0008] As a further improvement of this utility model, the laser line projector is attached to the side of the gravity balance hammer bracket.
[0009] As a further improvement of this utility model, the vertical self-balancing cage can be detachably connected to the suspended outer cage.
[0010] As a further improvement of this utility model, the outer cage is provided with multiple hanging rods, and the load-bearing bracket is provided with multiple connecting sleeves. The connecting sleeves are hung on the hanging rods one by one and fixed by connecting bolts.
[0011] As a further improvement of this utility model, a lifting ring is provided at the top of the suspended outer cage.
[0012] As a further improvement of this utility model, the hanging outer cage is cylindrical.
[0013] The beneficial effects of this invention are as follows: This invention applies the centripetal force theory of Earth's gravity to design a vertical self-balancing cage. The vertical self-balancing cage consists of a load-bearing support, a self-balancing support, and a gravity balance hammer bracket, which are freely suspended from top to bottom. It has an X and Y bidirectional suspension mechanism. Even if the outer cage tilts due to unevenness at the bottom of the pile hole, the weight of the gravity balance hammer can keep the laser line projector installed inside vertical, ensuring that the laser line projector always projects a vertical crosshair upwards. The deviation between the intersection of the crosshairs projected onto the top of the pile hole and the actual center point of the pile hole indicates the verticality deviation of the pile hole. This invention is applicable to the verticality detection of manually or mechanically drilled cast-in-place piles. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 This is an exploded view of the present invention;
[0016] Figure 3 This is a schematic diagram of the structure of the suspended outer cage in this utility model;
[0017] Figure 4 This is a schematic diagram of the vertical self-balancing cage in this utility model;
[0018] Figure 5 This is a top view of the vertical self-balancing cage in this utility model.
[0019] In the diagram: 1-Suspended outer cage; 2-Lifting ring; 3-Connecting bolt; 4-Connecting sleeve; 5-Vertical self-balancing cage; 6-Gravity counterweight bracket; 7-Self-balancing support; 8-Connecting ring; 9-Bearing support; 10-Gravity counterweight; 11-Laser projector; 12-Hanging rod. Detailed Implementation
[0020] The present invention will now be described in detail with reference to the accompanying drawings.
[0021] like Figure 1-5As shown, a verticality detection device for cast-in-place pile holes includes a suspended outer cage 1 and a vertical self-balancing cage 5. The vertical self-balancing cage 5 is connected to the center of the suspended outer cage 1. A gravity balance hammer 10 is provided inside the vertical self-balancing cage 5. A laser line projector 11 is provided on the upper surface of the gravity balance hammer 10. The bottom of the gravity balance hammer 10 is higher than the bottom of the suspended outer cage 1.
[0022] The vertical self-balancing cage 5 is composed of a load-bearing support 9, a self-balancing support 7, and a gravity balance weight bracket 6, which are freely suspended from top to bottom by a connecting ring 8. The load-bearing support 9 and the self-balancing support 7 are suspended at two points, and the self-balancing support 7 and the gravity balance weight bracket 6 are suspended at two points. The line connecting the suspension points of the load-bearing support 9 and the self-balancing support 7 is perpendicular to the line connecting the suspension points of the self-balancing support 7 and the gravity balance weight bracket 6.
[0023] The gravity balance weight 10 is inverted cone shape.
[0024] The laser line projector 11 is attached to the side of the gravity balance hammer bracket 6.
[0025] The vertical self-balancing cage 5 is detachably connected to the suspended outer cage 1.
[0026] The outer cage 1 is equipped with multiple hanging rods 12, and the load-bearing bracket 9 is equipped with multiple connecting sleeves 4. The connecting sleeves 4 are hung on the hanging rods 12 one by one and fixed by connecting bolts 3.
[0027] The outer cage 1 is cylindrical. The top of the outer cage 1 is equipped with a hanging ring 2.
[0028] To ensure that pile holes of different diameters can be inspected, this utility model designs a detachably connected suspension outer cage 1 and a vertical self-balancing cage 5. The diameter of the suspension outer cage 1 is manufactured according to the diameter of the pile hole to be inspected, so that different diameter suspension outer cages 1 can be selected according to different diameter pile holes and installed and fixed with the vertical self-balancing cage 5.
[0029] Example 1
[0030] In this embodiment, φ8 steel bars are used to fabricate the suspended outer cage 1, as well as the gravity balance hammer bracket 6, self-balancing bracket 7, and load-bearing bracket 9 of the vertical self-balancing cage 5; φ6 steel bars are used to fabricate the connecting ring 8; φ10 steel bars are bent and threaded to fabricate the hanging rod 12; φ12 steel pipes are used to fabricate the connecting sleeve 4; there are 3 sets of hanging rods 12 and connecting sleeves 4.
[0031] The weight of the gravity balance weight 10 is 2kg. After the laser line projector 11 is connected to the gravity balance weight 10 with bolts, it is installed in the vertical self-balancing cage 5, initially leveled, and then firmly fixed to the gravity balance weight bracket 6.
[0032] Three lifting rings 2 are connected by φ4 steel wire ropes. After the three steel wire ropes are brought together, the length of the steel wire rope used for suspension is determined according to the depth of the pile hole.
[0033] Keep the laser line projector 11 powered on and slowly lower the device into the pile hole using manual hoisting. After the outer cage 1 contacts the bottom of the hole, place a frosted glass or plexiglass target at the opening of the pile hole to display the light spot projected by the laser line projector 11. Measure the deviation between the intersection of the crosshairs projected onto the target at the opening of the pile hole and the measured center point at the opening of the pile hole to obtain the verticality deviation value of the pile hole. Compare this value with the allowable value in the specification to confirm whether the quality of the pile hole meets the requirements.
Claims
1. A device for detecting the verticality of cast-in-place pile holes, characterized in that: It includes a suspended outer cage (1) and a vertical self-balancing cage (5). The vertical self-balancing cage (5) is connected to the center of the suspended outer cage (1). A gravity balance weight (10) is provided inside the vertical self-balancing cage (5). A laser line projector (11) is provided on the upper surface of the gravity balance weight (10). The bottom of the gravity balance weight (10) is higher than the bottom of the suspended outer cage (1).
2. The verticality detection device for cast-in-place piles according to claim 1, characterized in that: The vertical self-balancing cage (5) is composed of a load-bearing bracket (9), a self-balancing bracket (7), and a gravity balance hammer bracket (6) suspended freely from top to bottom. The load-bearing bracket (9) and the self-balancing bracket (7) are suspended at two points, and the self-balancing bracket (7) and the gravity balance hammer bracket (6) are suspended at two points. The line connecting the suspension points between the load-bearing bracket (9) and the self-balancing bracket (7) is perpendicular to the line connecting the suspension points between the self-balancing bracket (7) and the gravity balance hammer bracket (6).
3. The verticality detection device for cast-in-place piles according to claim 2, characterized in that: The gravity balance weight (10) is inverted cone shape.
4. The verticality detection device for cast-in-place piles according to claim 3, characterized in that: The laser line projector (11) is attached to the side of the gravity balance hammer bracket (6).
5. A device for detecting the verticality of a cast-in-place pile hole according to any one of claims 1-4, characterized in that: The vertical self-balancing cage (5) is detachably connected to the suspended outer cage (1).
6. The verticality detection device for cast-in-place piles according to claim 2, characterized in that: The suspended outer cage (1) is provided with multiple hanging rods (12), and the load-bearing bracket (9) is provided with multiple connecting sleeves (4). The connecting sleeves (4) are hung on the hanging rods (12) one by one and fixed by connecting bolts (3).
7. The verticality detection device for cast-in-place piles according to claim 6, characterized in that: The top of the suspended outer cage (1) is equipped with a lifting ring (2).
8. The verticality detection device for cast-in-place piles according to claim 7, characterized in that: The suspended outer cage (1) is cylindrical.