Engineering construction pile body multi-section telescopic pile casing and using method thereof

Abstract

The invention discloses an engineering construction pile body multi-section telescopic pile casing and a using method thereof, and relates to the technical field of pile casings. The engineering construction pile body multi-section telescopic pile casing comprises a pile casing base, a supporting frame, a sleeve base, a top pile casing, a plurality of sets of multi-stage telescopic pile casings, an adjusting unit and a fine adjustment unit. According to the multi-section telescopic pile casing for the engineering construction pile body, the angle of the pile casing can be accurately and flexibly adjusted through the adjusting unit, the requirements of complex terrains and the special angle of the pile body are easily met, the construction difficulty and cost are reduced, and the precision is guaranteed; the multi-stage telescopic pile casing splicing design is adopted, free splicing and length adjustment can be achieved according to the pile body depth, the pile casing reserve variety is reduced, and the cost and management difficulty are reduced; and the fine adjustment unit is further arranged, the position deviation of the pile casing caused by soil settlement, operation errors and the like can be conveniently and accurately finely adjusted, the final position precision of the pile body is ensured, and the efficiency, quality and universality of pile foundation construction are comprehensively improved.

Description

Technical Field

[0001] The invention relates to the technical field of pile casings, in particular to a multi-section telescopic casing for an engineering construction pile and a use method thereof. Background Art

[0002] Pile casing is a temporary steel or concrete cylindrical structure used during pile foundation construction. It is typically placed around the pile hole to provide protection and support. It is an essential auxiliary tool for pile foundation construction and is widely used in various construction projects, bridge projects, port projects, and other fields involving pile foundation construction.

[0003] Before the pile foundation is constructed, the pile center is determined according to the design requirements, and then the casing is accurately placed and fixed at that location. The traditional casing usage process has the following shortcomings:

[0004] First, casings are typically installed using a simple fixed method, making it difficult to precisely adjust the angle of the casing to meet actual construction requirements. For example, when encountering terrain with large undulations or when the pile design requires a special angle, traditional casings cannot be flexibly adjusted. They can only be repositioned and installed to meet the requirements as much as possible. This not only increases construction difficulty and time costs, but also makes it difficult to ensure pile construction accuracy.

[0005] Second, during the casing installation process, even if the initial positioning is accurate, slight deviations in the casing position may occur due to factors such as uneven soil settlement and construction operation errors. Traditional casing fixing methods make it difficult to accurately correct the casing position, affecting the final position accuracy of the pile.

[0006] Third, existing pile casings are typically fixed in length and cannot be flexibly adjusted to the actual depth requirements of the pile in different projects. When constructing piles at different depths, it is necessary to prepare casings of various lengths, increasing construction costs and management difficulties. To address these shortcomings of the existing technology, the present invention provides a multi-section telescopic pile casing for construction projects and a method for its use to address these issues. Summary of the Invention

[0007] In response to the deficiencies in the prior art, the present invention provides a multi-section telescopic casing for an engineering construction pile body and a method for using the same. The casing can be accurately and flexibly adjusted in angle through an adjustment unit, easily adapting to complex terrain and special angle requirements of the pile body, reducing construction difficulty and cost while ensuring accuracy. A multi-stage telescopic casing splicing design is adopted, which can freely splice and adjust the length according to the depth of the pile body, reducing the types of casing reserves, reducing costs and management difficulty. A fine-tuning unit is also provided, which can conveniently and accurately fine-tune the position deviation of the casing caused by soil settlement, operational errors, etc., ensuring the final position accuracy of the pile body, and comprehensively improving the efficiency, quality and versatility of pile foundation construction.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a multi-section telescopic casing for an engineering construction pile, comprising a casing base, a support frame, a sleeve, a top casing, several groups of multi-stage telescopic casings, an adjustment unit and a fine-tuning unit;

[0009] The casing base is set on the target ground;

[0010] The support frame is arranged on the casing base;

[0011] The sleeve is rotatably connected to the support frame;

[0012] The top casing is movably clamped inside the sleeve;

[0013] Several groups of multi-stage telescopic casings are movably connected to the top casing, and the several groups of multi-stage telescopic casings are spliced with each other;

[0014] The adjusting unit is provided on the supporting frame and is used for adjusting the position of the sleeve;

[0015] The fine adjustment unit is arranged on the sleeve and is used for adjusting the position of the top casing.

[0016] Preferably, the sleeve is provided with an adjustment shaft, the adjustment shaft is rotatably connected to the support frame, and the adjustment unit includes:

[0017] a worm gear, disposed on the adjusting shaft;

[0018] A worm is rotatably connected to the support frame and meshes with the worm wheel.

[0019] Preferably, the support frame is provided with an indicator unit for displaying the sleeve adjustment information, and the indicator unit includes:

[0020] A fixing frame, arranged on the supporting frame;

[0021] a dial, arranged on the fixing frame;

[0022] An indicator arrow is provided on the worm gear and indicates a scale position of the scale.

[0023] Preferably, the fine-tuning unit includes:

[0024] A fixed track is arranged on the sleeve;

[0025] An adjusting block is slidably connected to the fixed rail, and the adjusting block is clamped with the top casing;

[0026] a first screw rod, rotatably connected to the fixed rail and threadedly connected to the adjustment block;

[0027] The limiting block is arranged on the adjusting block, and the limiting block is slidably connected to the fixed track.

[0028] Preferably, a slot is provided on the adjusting block, a locking block is provided on the top protective tube, the locking block is movably engaged in the slot, and a locking assembly for limiting the locking block is provided on the adjusting block.

[0029] Preferably, a lock hole is provided on the locking block, and the locking assembly comprises:

[0030] A guide rod is provided on the adjusting block;

[0031] A clamping platform is provided on the guide rod;

[0032] The locking rod is arranged on the clamping platform and is movably clamped in the lock hole.

[0033] Preferably, the guide rod is connected to a baffle, the baffle is threadedly connected to a second screw rod, and the second screw rod is rotatably connected to the clamping platform.

[0034] Preferably, the casing base is provided with a plurality of positioning holes, and positioning piles are movably inserted into the positioning holes.

[0035] Preferably, the top protective tube is provided with a first outer threaded opening, and the two ends of the multi-stage telescopic protective tube are respectively provided with a second outer threaded opening and an inner threaded opening, and multiple groups of the multi-stage telescopic protective tubes are spliced through the second outer threaded opening and the inner threaded opening, and the first outer threaded opening is engaged with the inner threaded opening.

[0036] A second aspect of the present invention provides a method for using a multi-section telescopic casing for a construction pile, the method comprising the following steps: Step S1, placing a casing base on a target ground surface, fixing the casing base to the ground through positioning holes and positioning piles, ensuring the stability of the casing base and providing a reliable foundation for subsequent construction;

[0037] Step S2: Using the adjustment unit to drive the sleeve to rotate, preliminarily adjusting the angle position of the sleeve according to construction requirements;

[0038] Step S3, according to the casing height required for construction, several groups of multi-stage telescopic casings are sequentially spliced;

[0039] Step S4, connecting the assembled multi-stage telescopic casing to the top casing;

[0040] Step S5: placing the assembled multi-stage telescopic casing and the top casing as a whole inside the sleeve and inside the foundation where pile protection is required;

[0041] Step S6, making the top casing engage with the interior of the sleeve;

[0042] Step S7: fine-tuning the overall position of the multi-stage telescopic casing and the top casing by the fine-tuning unit, so that the casing is moved as a whole to a more precise construction position;

[0043] Step S8, after completing the installation of the telescopic casing, pile construction is carried out, such as pouring concrete and other operations. After the construction is completed, the multi-stage telescopic casing and the top casing are removed in sequence in the reverse order of installation, the construction site is cleaned, and the various components are properly stored for next use.

[0044] The present invention discloses a multi-section telescopic casing for an engineering construction pile and a method for using the same, which has the following beneficial effects:

[0045] 1. The construction piles in this project feature multi-section telescopic casings. Adjustment units are provided to precisely adjust the angle of the top casing. When faced with complex terrain or special construction requirements, construction workers can easily and precisely adjust the casing angle without repositioning the installation. This significantly reduces construction difficulty and time costs while effectively ensuring pile construction accuracy. This provides reliable support for pile foundation construction under various complex engineering conditions, improving construction efficiency and quality.

[0046] 2. The multi-section telescopic casing of the construction pile is equipped with a fine-tuning unit. A screw drive mechanism drives the adjustment block to slide on a fixed track, thereby precisely adjusting the axial position of the top casing within the sleeve. If a slight deviation in the casing position is detected, the construction personnel can quickly and accurately adjust the casing using the fine-tuning unit, moving the entire casing to a more precise construction position, meeting the requirements of high-precision construction, effectively ensuring the final position accuracy of the pile body, and improving the quality and reliability of pile foundation construction.

[0047] 3. The project employed multi-section telescopic casings for the piles. These multi-stage casings were spliced together using external and internal threaded connections. Construction personnel could flexibly splice different numbers of these casings based on the required pile depth, allowing for free adjustment of casing length. This design eliminated the need for multiple casings for different depths, reduced the number and variety of casings in stock, and lowered construction costs and management complexity. It also better accommodated the construction needs of piles of varying depths, enhancing the casing's versatility and construction flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0049] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0050] Figure 2 It is an inclined schematic diagram of the top casing and the multi-stage telescopic casing of the present invention;

[0051] Figure 3 This is a disassembly diagram of the multi-stage telescopic casing of the present invention;

[0052] Figure 4 This is a schematic structural diagram of the top casing of the present invention;

[0053] Figure 5 Schematic diagram of the structure of the regulating unit of the present invention;

[0054] Figure 6 Schematic diagram of the structure of the fine-tuning unit of the present invention;

[0055] Figure 7 It is a structural schematic diagram of the locking assembly of the present invention.

[0056] In the figure: 1. Casing base; 11. Positioning hole; 12. Positioning pile; 2. Support frame; 3. Sleeve; 31. Adjusting shaft; 4. Top casing; 41. Locking block; 42. Locking hole; 43. First external threaded port; 5. Multi-stage telescopic casing; 51. Second external threaded port; 52. Internal threaded port; 6. Adjusting unit; 61. Worm gear; 62. Worm; 7. Indicating unit; 71. Dial; 72. Indicating arrow; 73. Fixing frame; 8. Fine-tuning unit; 81. Fixed rail; 82. Adjusting block; 821. Card slot; 83. First screw rod; 84. Limiting block; 9. Locking assembly; 91. Guide rod; 92. Card connection platform; 93. Locking rod; 94. Baffle; 95. Second screw rod. DETAILED DESCRIPTION

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0058] The embodiment of the present application provides a multi-section telescopic casing for an engineering construction pile and a method for using the same, thereby solving the problem that the existing casing fixing method is simple and difficult to accurately adjust the angle according to actual construction needs. When faced with large terrain fluctuations or special angle requirements for the pile body, it cannot be flexibly adjusted and can only be repositioned and installed, which increases the construction difficulty and time cost and makes it difficult to ensure the accuracy of pile construction. On the other hand, even if the initial positioning is correct during installation, slight position deviations may occur due to uneven soil settlement, construction operation errors, etc., and traditional fixing methods are difficult to accurately correct, affecting the final position accuracy of the pile body. In addition, the existing casing is fixed in length and cannot be flexibly adjusted according to different pile body depths. A variety of specifications need to be prepared, which greatly increases construction costs and management difficulties.

[0059] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0060] Example 1:

[0061] The embodiment of the present invention discloses a multi-section telescopic casing for a construction pile body. Figure 1 To the attached Figure 7 As shown, it includes a casing base 1, a support frame 2, a sleeve 3, a top casing 4, several groups of multi-stage telescopic casings 5, an adjustment unit 6 and a fine-tuning unit 8;

[0062] The casing base 1 serves as the bottom support component of the entire casing system. It is provided with a plurality of positioning holes 11, into which positioning piles 12 are movably inserted. By inserting the positioning piles 12 into the positioning holes 11 and driving them into the target ground, the friction and grip between the positioning piles 12 and the ground are utilized to firmly fix the casing base 1 to the ground, providing a stable foundation for the subsequent installation of components and preventing the casing from shaking or shifting during the construction process, which may affect the quality and safety of the pile construction.

[0063] The support frame 2 is arranged on the casing base 1 to provide an installation and support platform for the sleeve 3. At the same time, the support frame 2 provides an installation position for the adjustment unit 6.

[0064] The sleeve 3 is rotatably connected to the support frame 2 . An adjusting shaft 31 is provided on the sleeve 3 , and the adjusting shaft 31 is rotatably connected to the support frame 2 .

[0065] The sleeve 3 serves as a mounting carrier for the top casing 4 and is connected to the support frame 2 through an adjusting shaft 31, so that the sleeve 3 can rotate on the support frame 2, thereby adjusting the angular position of the top casing 4 to adapt to different construction requirements and terrain conditions.

[0066] The top casing 4 is movably connected to the inside of the sleeve 3 . A locking block 41 is provided on the top casing 4 . A locking hole 42 is provided on the locking block 41 . A first external threaded opening 43 is also provided on the top casing 4 .

[0067] The top casing 4 is the initial component of the casing system. It securely fits within the housing 3 by snapping into place. The locking block 41, in conjunction with the locking assembly 9, secures the top casing 4 within the housing 3, preventing it from loosening or falling out during construction. The first external threaded opening 43 engages with the internal threaded opening 52 of the multi-stage telescopic casing 5, securing the top casing 4 to the housing 3.

[0068] Several groups of multi-stage telescopic casings 5 are movably connected to the top casing 4 and are spliced with each other. Two ends of the multi-stage telescopic casing 5 are respectively provided with a second outer threaded opening 51 and an inner threaded opening 52 .

[0069] The multi-stage telescopic casing 5, through the splicing method of the second outer thread 51 and the inner thread 52, can flexibly adjust the length of the casing according to the required pile depth. During the construction process, as the pile body continues to deepen, the multi-stage telescopic casing 5 is spliced section by section, providing continuous protection for the pile body, preventing problems such as pile hole collapse and mud overflow, and ensuring smooth progress of pile construction.

[0070] Adjustment unit 6 is mounted on support frame 2 and includes a worm gear 61 and a worm 62. Worm gear 61 is mounted on adjustment shaft 31, and worm 62 is rotatably connected to support frame 2 and meshes with worm gear 61. Rotation of worm gear 62 drives worm gear 61, which in turn drives adjustment shaft 31 and sleeve 3, adjusting the position of sleeve 3. Sleeve 3 remains stably in its adjusted position and is protected from unintended rotation by external forces.

[0071] The fine-tuning unit 8 is arranged on the sleeve 3, and includes a fixed rail 81, an adjusting block 82, a first screw rod 83 and a limit block 84. The fixed rail 81 is arranged on the sleeve 3, the adjusting block 82 is slidably connected to the fixed rail 81, the adjusting block 82 is clamped with the top casing 4, the first screw rod 83 is rotatably connected to the fixed rail 81 and is threadedly connected to the adjusting block 82, the limit block 84 is arranged on the adjusting block 82, and the limit block 84 is slidably connected to the fixed rail 81.

[0072] Rotate the first screw rod 83. Since the first screw rod 83 is threadedly connected to the adjustment block 82, and the adjustment block 82 is slidably connected to the fixed rail 81 through the limit block 84, the rotation of the first screw rod 83 will drive the adjustment block 82 to slide on the fixed rail 81, and then drive the top casing 4 to perform precise axial position fine-tuning in the sleeve 3, so that the casing as a whole can be moved to a more accurate construction position to meet the requirements of high-precision construction.

[0073] A second aspect of the present invention provides a method for using a multi-section telescopic casing for a construction pile, the method comprising the following steps: Step S1, placing a casing base 1 on the target ground, fixing the casing base 1 to the ground through positioning holes 11 and positioning piles 12, ensuring the stability of the casing base 1, and providing a reliable foundation for subsequent construction;

[0074] Step S2: Using the adjustment unit 6 to drive the sleeve 3 to rotate, preliminarily adjusting the angle position of the sleeve 3 according to construction requirements;

[0075] Step S3, according to the casing height required for construction, several groups of multi-stage telescopic casings 5 are sequentially spliced;

[0076] Step S4, connecting the assembled multi-stage telescopic casing 5 to the top casing 4;

[0077] Step S5, placing the assembled multi-stage telescopic casing 5 and the top casing 4 as a whole inside the sleeve 3 and inside the foundation that needs pile protection;

[0078] Step S6, making the top casing 4 engage with the inside of the sleeve 3;

[0079] Step S7: The fine-tuning unit 8 drives the multi-stage telescopic casing 5 and the top casing 4 to fine-tune the overall position, so that the casing moves as a whole to a more accurate construction position;

[0080] Step S8, after completing the installation of the telescopic casing, pile construction is carried out, such as pouring concrete and other operations. After the construction is completed, the multi-stage telescopic casing 5 and the top casing 4 are removed in sequence in the reverse order of the installation, the construction site is cleaned, and the various components are properly stored for next use.

[0081] Example 2:

[0082] The embodiment of the present invention discloses a multi-section telescopic casing for a construction pile body. Figure 1 To the attached Figure 7 As shown, it includes a casing base 1, a support frame 2, a sleeve 3, a top casing 4, several groups of multi-stage telescopic casings 5, an adjustment unit 6 and a fine-tuning unit 8;

[0083] The casing base 1 is set on the target ground;

[0084] The support frame 2 is arranged on the casing base 1;

[0085] The sleeve 3 is rotatably connected to the support frame 2;

[0086] The top casing 4 is movably connected to the inside of the sleeve 3;

[0087] Several groups of multi-stage telescopic casings 5 are movably connected to the top casing 4, and several groups of multi-stage telescopic casings 5 are spliced with each other;

[0088] The adjustment unit 6 is provided on the support frame 2 and is used to adjust the position of the sleeve 3;

[0089] The fine-tuning unit 8 is provided on the sleeve 3 and is used to adjust the position of the top casing 4 .

[0090] An indicating unit 7 for displaying adjustment information of the sleeve 3 is provided on the support frame 2. The indicating unit 7 includes a fixing frame 73, a dial 71 and an indicating arrow 72. The fixing frame 73 is set on the support frame 2, the dial 71 is set on the fixing frame 73, and the indicating arrow 72 is set on the worm gear 61 and indicates the scale position of the dial 71.

[0091] When the adjustment unit 6 drives the sleeve 3 to rotate, the indicator arrow 72 on the worm gear 61 will move with the rotation of the worm gear 61. By observing the indicated position of the indicator arrow 72 on the dial 71, the construction personnel can accurately grasp the adjustment information of the sleeve 3, thereby achieving precise control of the angular position of the sleeve 3 and improving construction accuracy.

[0092] A slot 821 is provided on the adjusting block 82 , a locking block 41 is provided on the top casing 4 , and the locking block 41 is movably engaged in the slot 821 . A locking assembly 9 for limiting the locking block 41 is provided on the adjusting block 82 .

[0093] A locking hole 42 is provided on the locking block 41, and the locking assembly 9 includes a guide rod 91, a clamping platform 92, a locking rod 93, a baffle 94 and a second screw rod 95. The guide rod 91 is arranged on the adjusting block 82, the clamping platform 92 is arranged on the guide rod 91, the locking rod 93 is arranged on the clamping platform 92 and is movably clamped in the locking hole 42, the guide rod 91 is connected to the baffle 94, and the baffle 94 is threadedly connected to the second screw rod 95, and the second screw rod 95 is rotatably connected to the clamping platform 92.

[0094] The second screw rod 95 is rotated, and the second screw rod 95 rotates on the baffle 94 and drives the clamping platform 92 to move along the guide rod 91, so that the locking rod 93 is movably clamped in the lock hole 42 of the locking block 41, thereby locking and fixing the top casing 4 and the adjusting block 82, ensuring that the connection operation of the top casing 4 and the adjusting block 82 is convenient and the construction is stable. It is also convenient to disassemble the top casing 4 and the adjusting block 82 later. According to the actual construction situation, the number of multi-stage telescopic casings 5 can be increased to ensure construction safety and quality.

[0095] During the actual construction process, the multi-section telescopic casing of the construction pile of this project showed extremely high flexibility and adaptability. For example, when the construction pile depth requirement is large, the installed casing can be used for the initial piling operation. After driving into the ground to a depth of 2 meters (after the depth of one or more sections of casing (depending on the geological conditions)), the construction is suspended, and a new section of multi-stage telescopic casing 5 is spliced to the top of the currently installed casing. Then, with the help of construction equipment, the spliced casing is pressed down into the pile hole as a whole, so that it penetrates deep into the ground; after driving into the ground to a depth of 2 meters again (after the depth of one or more sections of casing (depending on the geological conditions)), the above splicing operation is repeated, that is, another section of multi-stage telescopic casing 5 is spliced and pressed into the pile hole. Through this method of splicing section by section and pressing down step by step, the casing length can be flexibly and accurately adjusted according to the actual pile depth requirement, providing continuous and effective protection for pile construction, ensuring the smooth progress of the construction process, and meeting the construction requirements of piles of different depths.

[0096] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0097] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-section telescopic casing for a construction pile, characterized in that: include: A casing base (1) is arranged on the target ground; A support frame (2) is arranged on the casing base (1); A sleeve (3) rotatably connected to the support frame (2); A top casing (4) is movably connected to the interior of the sleeve (3); Several groups of multi-stage telescopic protective tubes (5) are movably connected to the top protective tube (4), and the several groups of multi-stage telescopic protective tubes (5) are spliced with each other; an adjusting unit (6), arranged on the support frame (2) and used for adjusting the position of the sleeve (3); A fine adjustment unit (8) is provided on the sleeve (3) and is used to adjust the position of the top casing (4).

2. The multi-section telescopic casing for engineering construction pile according to claim 1, characterized in that: The sleeve (3) is provided with an adjustment shaft (31), and the adjustment shaft (31) is rotatably connected to the support frame (2). The adjustment unit (6) includes: A worm gear (61) is provided on the adjusting shaft (31); A worm (62) is rotatably connected to the support frame (2) and meshes with the worm wheel (61).

3. The multi-section telescopic casing for engineering construction pile according to claim 2, characterized in that: The support frame (2) is provided with an indicator unit (7) for displaying adjustment information of the sleeve (3), and the indicator unit (7) comprises: A fixing frame (73) is arranged on the supporting frame (2); A scale plate (71) is arranged on the fixing frame (73); An indicating arrow (72) is provided on the worm wheel (61) and indicates the scale position of the dial (71).

4. The multi-section telescopic casing for engineering construction pile according to claim 1, characterized in that: The fine-tuning unit (8) comprises: A fixed track (81) is arranged on the sleeve (3); An adjusting block (82) is slidably connected to the fixed rail (81), and the adjusting block (82) is engaged with the top casing (4); A first screw rod (83) is rotatably connected to the fixed rail (81) and is threadedly connected to the adjustment block (82); A limit block (84) is provided on the regulating block (82), and the limit block (84) is slidably connected to the fixed track (81).

5. The multi-section telescopic casing for engineering construction pile according to claim 4, characterized in that: The adjusting block (82) is provided with a slot (821), the top protective tube (4) is provided with a locking block (41), the locking block (41) is movably engaged in the slot (821), and the adjusting block (82) is provided with a locking assembly (9) for limiting the locking block (41).

6. The multi-section telescopic casing for engineering construction pile according to claim 5, characterized in that: The locking block (41) is provided with a locking hole (42), and the locking assembly (9) comprises: A guide rod (91) is provided on the adjusting block (82); A clamping platform (92) is provided on the guide rod (91); The locking rod (93) is arranged on the clamping platform (92) and is movably clamped in the locking hole (42).

7. The multi-section telescopic casing for engineering construction pile according to claim 6, characterized in that: The guide rod (91) is connected to a baffle (94), the baffle (94) is threadedly connected to a second screw rod (95), and the second screw rod (95) is rotatably connected to the clamping platform (92).

8. The multi-section telescopic casing for engineering construction pile according to claim 1, characterized in that: The casing base (1) is provided with a plurality of positioning holes (11), and positioning piles (12) are movably inserted into the positioning holes (11).

9. The multi-section telescopic casing for engineering construction pile according to claim 1, characterized in that: The top protective tube (4) is provided with a first outer threaded opening (43), and the two ends of the multi-stage telescopic protective tube (5) are respectively provided with a second outer threaded opening (51) and an inner threaded opening (52). Multiple groups of the multi-stage telescopic protective tubes (5) are spliced together through the second outer threaded opening (51) and the inner threaded opening (52), and the first outer threaded opening (43) is engaged with the inner threaded opening (52).

10. A method for using a multi-section telescopic casing for a construction pile according to any one of claims 1 to 9, characterized in that: The method of use comprises the following steps: step S1, placing the casing base (1) on the target ground, fixing the casing base (1) on the ground through the positioning holes (11) and the positioning piles (12), ensuring the stability of the casing base (1), and providing a reliable foundation for subsequent construction; Step S2, using the adjustment unit (6) to drive the sleeve (3) to rotate, and preliminarily adjusting the angle position of the sleeve (3) according to construction requirements; Step S3, according to the casing height required for construction, several groups of multi-stage telescopic casings (5) are spliced in sequence; Step S4, connecting the assembled multi-stage telescopic casing (5) to the top casing (4); Step S5, placing the assembled multi-stage telescopic casing (5) and the top casing (4) as a whole inside the sleeve (3) and inside the foundation where pile protection is required; Step S6, making the top casing (4) engage with the interior of the sleeve (3); Step S7, fine-tuning the overall position of the multi-stage telescopic casing (5) and the top casing (4) by the fine-tuning unit (8), so that the casing is moved as a whole to a more accurate construction position; Step S8, after the installation of the telescopic casing is completed, pile construction is carried out, such as pouring concrete and other operations. After the construction is completed, the multi-stage telescopic casing (5) and the top casing (4) are removed in sequence in the reverse order of the installation, the construction site is cleaned, and the various components are properly stored for next use.

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