A positioning device for deep casing of bored piles

Abstract

This utility model relates to a positioning device for deep casing installation in bored piles, comprising a positioning platform for providing a stable reference plane; a locator fixed on the positioning platform for locating the center of the pile; a guiding device connected to the positioning platform and extending downward for guiding the casing during its lowering; and a bottom fixing device connected to the bottom of the guiding device for fixing its position to ensure the verticality and planar position of the casing are accurate. This utility model can simply and effectively reduce casing installation offset and tilt, and effectively improve the efficiency and accuracy of casing installation operations.

Description

Technical Field

[0001] This utility model relates to the field of cast-in-place pile construction, specifically a positioning device for deep casing of bored cast-in-place piles. Background Technology

[0002] Drilled piles are widely used in construction due to their high bearing capacity and adaptability to complex geological conditions. The casing, a key component in drilled pile construction, primarily serves to position and guide the pile, prevent borehole collapse, isolate surface water, and fix the pile position. The positioning accuracy of the casing directly affects the subsequent hole formation quality, reinforcement cage installation, and concrete pouring. Excessive positioning error can lead to pile displacement, borehole tilting, or even borehole collapse, thus affecting the safety and durability of the overall structure. Especially when constructing in sandy soil, silt, soft soil, or fluid plastic strata, where deep casings are required, strict control over the positioning and verticality accuracy of the casing is essential.

[0003] Traditional casing positioning typically involves establishing four control points based on the center point of the pile before casing installation. These control points are usually constructed with reinforcing steel and driven below ground level. During casing installation, the distance between the control piles and the casing is repeatedly measured to control the casing's position. This measurement and positioning method requires multiple measurements and continuous adjustments to the casing position. For deep casing excavation and installation, this method results in significant measurement errors, makes it difficult to effectively monitor the casing's verticality, and leads to casing tilting. Furthermore, multiple measurements are susceptible to human error, environmental factors, and geological conditions, resulting in large reading errors, low measurement efficiency, and an inability to meet the demands of high-precision construction, thus increasing construction time and costs. Utility Model Content

[0004] The present invention aims to overcome the defects of the prior art and provide a positioning device for deep casing of bored piles, which solves the problems of positioning accuracy and verticality deviation in the deep casing installation during bored pile construction.

[0005] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0006] A positioning device for deep casing of bored piles, characterized in that it comprises:

[0007] A positioning platform is used to provide a stable reference surface;

[0008] A locator, fixed to the positioning platform, is used to locate the center of the pile position;

[0009] A guiding device, connected to the positioning platform and extending downward, is used to guide the casing during its lowering process;

[0010] A bottom fixing device is connected to the bottom of the guide device to fix the position of the guide device, so as to ensure the verticality and planar position of the protective cylinder are accurate.

[0011] The aforementioned positioning device for deep casing of bored piles is characterized in that: the positioning platform is a rectangular platform welded from six square tubes, used to support the locator and the guide device.

[0012] The aforementioned positioning device for deep casing of bored piles is characterized in that: the locator includes a steel bar head, which is placed at a fixed position on the positioning platform by a fixing member, for accurately determining the center position of the casing.

[0013] The aforementioned deep casing embedment positioning device for bored piles is characterized in that: the fixing component includes a steel bar horizontally connected to the positioning platform and channel steels set at both ends of the steel bar for connecting with the positioning platform.

[0014] The aforementioned deep casing embedment positioning device for bored piles is characterized in that: the guiding device consists of at least four square tubes, which extend downward and connect to the bottom fixing device to form a guiding structure adapted to the diameter of the casing, so as to guide and position the casing during its lowering process.

[0015] The aforementioned positioning device for deep casing of bored piles is characterized in that: each square tube of the guide device is fixed to the positioning platform by welding or bolting to ensure the stability and verticality of the guide device.

[0016] The aforementioned deep casing embedment positioning device for bored piles is characterized in that: the bottom fixing device is a rectangular frame, which is located around the guide device to fix the position of the guide device and ensure its stability during construction.

[0017] The aforementioned positioning device for deep casing embedment in bored piles is characterized in that: a level is also provided on the positioning platform to detect whether the positioning platform is in a horizontal state during construction, ensuring the accuracy of the positioning system; when the positioning platform is in a horizontal state, the steel bar head of the locator can accurately locate the center of the pile, providing a foundation for the accurate embedment of the casing.

[0018] The aforementioned positioning device for deep casing installation in bored piles is characterized in that: the square tube surface of the guide device is provided with scale markings, and construction personnel can monitor the lowering depth and verticality of the casing in real time by observing the scale markings and the gap between the casing and the guide device, thereby further improving the accuracy of casing installation.

[0019] The beneficial effects of this utility model are as follows: As can be seen from the above technical solution, this application provides a positioning device for deep casing installation in bored piles. During the casing installation process, the position and attitude of the casing can be monitored and adjusted in real time by observing the positioning platform and guiding device, ensuring its positioning accuracy and treatment requirements. Only one measurement and adjustment of the positioning platform position is needed; subsequent casing installations do not require further measurement and adjustment, reducing the number of manual measurements and adjustments and improving construction efficiency. The device is simple and convenient to operate and easy to master. It is suitable for the installation of deep casings in bored pile construction under various complex geological conditions.

[0020] The operation process described in this application is simple and easy to understand; construction personnel can master it after simple training. The design of the positioning platform and guiding device is intuitive and clear. Construction personnel can adjust the position and verticality of the casing in real time by observing the gap between the casing and the guiding device, without the need for complex measuring equipment or complicated operating procedures. This simple operation method reduces the difficulty of construction and minimizes errors caused by improper operation. Attached Figure Description

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0022] Figure 1 This is a schematic diagram of the structure of this application.

[0023] Figure 2 Schematic diagram of the locator.

[0024] Figure 3 This is a schematic diagram of the side elevation.

[0025] Figure 4 This is a schematic diagram of the front elevation.

[0026] Figure 5 This is a schematic diagram viewed from above. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0028] like Figure 1-5 As shown: A positioning device for deep casing of bored piles, comprising:

[0029] Positioning platform 1 is used to provide a stable reference plane;

[0030] Positioner 2 is fixed on the positioning platform and is used to locate the center of the pile position;

[0031] The guide device 3 is connected to the positioning platform and extends downward to guide the casing during its lowering process.

[0032] Bottom fixing device 4 is connected to the bottom of the guide device and is used to fix the position of the guide device to ensure the verticality and planar position of the protective cylinder are accurate.

[0033] The positioning platform is a rectangular platform formed by welding six square tubes, which is used to support the locator and the guiding device.

[0034] The locator includes a steel bar end, which is placed at a fixed position on the positioning platform by a fixing member to accurately determine the center position of the casing.

[0035] The fastener includes a steel bar that is horizontally connected to the positioning platform and channel steels at both ends of the steel bar for connecting to the positioning platform.

[0036] The guiding device consists of at least four square tubes that extend downward and connect to the bottom fixing device to form a guiding structure that is adapted to the diameter of the protective cylinder, so as to guide and position the protective cylinder during its lowering process.

[0037] Each square tube of the guide device is fixed to the positioning platform by welding or bolting to ensure the stability and verticality of the guide device.

[0038] The design of the guiding device and the bottom fixing device effectively addresses these complex geological conditions. The guiding device ensures that the casing remains vertical during lowering, while the bottom fixing device further stabilizes the casing's position, preventing it from tilting or shifting due to unstable geological conditions, thereby ensuring construction quality and safety.

[0039] The bottom fixing device is a rectangular frame located around the guide device to fix its position and ensure its stability during construction.

[0040] The positioning platform is also equipped with a spirit level, which is used to check whether the positioning platform is in a horizontal state during construction to ensure the accuracy of the positioning system. When the positioning platform is in a horizontal state, the steel bar head of the locator can accurately locate the center of the pile, providing a foundation for the accurate installation of the casing.

[0041] The guide device has scale markings on its square tube surface. Construction workers can monitor the lowering depth and verticality of the casing in real time by observing the scale markings and the gap between the casing and the guide device, thereby further improving the accuracy of casing installation.

[0042] Operating steps:

[0043] Step 1: Use surveying instruments such as total station and level to measure and set the center point of the pile location.

[0044] Step 2: Draw out four control points based on the center point of the pile location. The control points are generally made of steel bars and driven into the ground.

[0045] Step 3: Excavate a pit according to the size of the casing, place the entire system device on the pit, adjust its position so that the steel bar head of the locator 2 coincides with the pile position, and use a spirit level to measure that the positioning platform 1 is in a horizontal state. Then fix the positioning platform 1 so that it cannot move, and then remove the locator 2 to start installing the casing.

[0046] Step 4: Use lifting equipment to vertically lift the casing and place it on the pile location via positioning platform 1. During the process, the casing must not violently collide with positioning platform 1, and the gap between the casing and guide device 2 should be constantly observed to ensure the verticality and accuracy of the casing's horizontal position.

[0047] Step 5: After checking that the casing position meets the requirements, remove the entire system device and backfill and fix the casing with cohesive soil.

[0048] Step 6: After acceptance, proceed to the next process.

[0049] In this embodiment, the deviation between the center position of the casing and the center of the pile was controlled within 5mm, and the verticality deviation was controlled within 0.5%, significantly improving the accuracy of casing installation. The entire casing installation process took only 2 hours, shortening the time by approximately 50% compared to traditional methods, greatly improving construction efficiency. Furthermore, due to its ease of operation, construction personnel can master the technique after simple training, reducing errors caused by improper operation. During subsequent drilling, reinforcement cage installation, and concrete pouring, no construction problems occurred due to casing offset or tilting, ensuring the overall quality of the project.

[0050] The above are merely embodiments provided in this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A positioning device for deep casing of bored piles, characterized in that... It includes: Positioning platform (1) is used to provide a stable reference surface; The locator (2) is fixed on the positioning platform (1) and is used to locate the center of the pile position; The guide device (3) is connected to the positioning platform (1) and extends downward to guide the casing during its lowering process; The bottom fixing device (4) is connected to the bottom of the guide device (3) to fix the position of the guide device (3) to ensure the verticality and planar position of the protective sleeve are accurate.

2. The device according to claim 1, characterized in that: The positioning platform (1) is a rectangular platform formed by welding six square tubes, which is used to support the locator (2) and the guide device (3).

3. The device according to claim 1, characterized in that: The locator (2) includes a steel bar end, which is placed at a fixed position on the positioning platform (1) by a fixing member to accurately determine the center position of the casing.

4. The device according to claim 3, characterized in that: The fastener includes a steel bar that is horizontally connected to the positioning platform and channel steels at both ends of the steel bar for connecting to the positioning platform.

5. The device according to claim 1, characterized in that: The guide device (3) consists of at least four square tubes that extend downward and connect to the bottom fixing device (4) to form a guide structure that is adapted to the diameter of the protective cylinder, so as to guide and position the protective cylinder during its lowering process.

6. A positioning device for deep casing of bored piles according to claim 5, characterized in that: Each square tube of the guide device (3) is fixed to the positioning platform (1) by welding or bolting to ensure the stability and verticality of the guide device (3).

7. The device according to claim 1, characterized in that: The bottom fixing device (4) is a rectangular frame that is placed around the guide device to fix the position of the guide device (3) and ensure its stability during construction.

8. The device according to claim 1, characterized in that: The positioning platform (1) is also equipped with a level ruler, which is used to detect whether the positioning platform (1) is in a horizontal state during construction to ensure the accuracy of the positioning system. When the positioning platform (1) is in a horizontal state, the steel bar head of the locator (2) can accurately locate the center of the pile position, providing a foundation for the accurate installation of the casing.

9. The device according to claim 5, characterized in that: The guide device (3) has scale markings on its square tube surface. Construction workers can monitor the lowering depth and verticality of the casing in real time by observing the scale markings and the gap between the casing and the guide device (3), thereby further improving the accuracy of casing installation.

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