Steel casing for broken pile splicing treatment of cast-in-situ bored pile

Abstract

The utility model relates to the technical field of constructional engineering, and discloses a steel casing for broken pile splicing treatment of a cast-in-situ bored pile, which comprises three protective plates, holes are formed in the outer parts of the protective plates, a plurality of wedge blocks are arranged at the contact parts of the protective plates, and the wedge blocks are arranged in the holes. The outer portions of the multiple wedge-shaped blocks are fixedly connected with connecting assemblies used for fixedly connecting the multiple protection plates, the outer portions of the connecting assemblies are in threaded connection with two screws, the connecting assemblies comprise multiple fixing plates, the outer portions of the multiple fixing plates are fixedly connected to the outer portions of the wedge-shaped blocks, and the outer portions of the multiple fixing plates are fixedly connected to the outer portions of the wedge-shaped blocks. And external threads of the screws are connected to the outer part of the fixing plate. According to the utility model, as the integral pile casing is difficult to pull out due to larger pressure when being pulled out, the pile casing is cut into three parts, and the soil pressure is correspondingly reduced to 1 / 3 of the integral pressure when each part is pulled out, so that the pile casing is convenient to pull out and reuse, and the workload of workers is reduced.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a steel casing for splicing broken bored piles. Background Technology

[0002] Drilled piles, as a foundation type in building engineering, are widely used due to their strong adaptability, moderate cost, and simple construction. However, serious quality accidents such as pile breakage often occur during construction due to tight schedules and heavy workloads. The handling of broken piles not only causes economic losses to the construction unit but also often leads to delays in the construction period and affects the overall quality of the project. Therefore, effective measures must be taken to handle broken piles and reduce the losses caused by accidents. In engineering practice, when the broken pile is relatively shallow, large-scale excavation is often used for pile breaking and splicing; when the broken pile is deep and splicing is not possible, additional piles are often used.

[0003] However, when the broken pile is located at an awkward depth of 5 to 8 meters below the ground, steel casing is often used for support, and a vertical shaft is manually excavated for in-situ splicing. Compared with the commonly used grouting method and reverse construction method, this method is more efficient, has a shorter construction period, and ensures the quality of splicing. However, when the groundwater level is shallow and the shallow part is a silty soil layer, the temporary maintenance measure of using steel casing often results in excessive soil pressure, making it impossible to pull out the steel casing.

[0004] Therefore, a steel casing for splicing broken bored piles is proposed to address the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a steel casing for the treatment of broken piles in bored cast-in-place piles, aiming to improve the problem that steel casings are not easy to pull out in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A steel casing for splicing broken bored piles includes three casing plates, each casing plate having holes on its exterior. Multiple wedge blocks are provided at the contact points of the casing plates. A connecting assembly for connecting and fixing the multiple casing plates is fixedly connected to the exterior of each wedge block. Two screws are threaded onto the exterior of the connecting assembly.

[0008] As a further description of the above technical solution:

[0009] The connecting assembly includes multiple fixing plates, the multiple fixing plates being externally fixedly connected to the outside of the wedge block, and the screws being externally threadedly connected to the outside of the fixing plates;

[0010] As a further description of the above technical solution:

[0011] The protective plate is fixedly connected to a protective component for protection. A spring is sleeved on the outside of the protective component, and a crash plate is fixedly connected to the outside of the protective component.

[0012] As a further description of the above technical solution:

[0013] The screw has an external thread that connects to the outside of the guard plate;

[0014] As a further description of the above technical solution:

[0015] The protective assembly includes multiple dampers, one end of which is fixedly connected to the outside of the guard plate, and the other end of which is fixedly connected to the outside of the crash plate.

[0016] As a further description of the above technical solution:

[0017] One end of the spring is fixedly connected to the outside of the guard plate, and the other end of the spring is fixedly connected to the outside of the anti-collision plate.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, the pressure is too high when the whole casing is pulled out, making it difficult to pull out. Therefore, by cutting the casing into three parts, the soil pressure when each part is pulled out is reduced to 1 / 3 of the whole, making it easier to pull out and reuse, thereby reducing the workload of the workers.

[0020] 2. In this utility model, by setting up the anti-collision plate, the anti-collision plate will protect the protective plate when it is impacted during transportation. The impact force will first press the anti-collision plate, which will then press the damper and spring to absorb the impact force, thereby achieving the protection of the protective plate. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a steel casing for splicing broken bored piles proposed in this utility model.

[0022] Figure 2 for Figure 1 Enlarged view of point A;

[0023] Figure 3 This is a schematic diagram of the anti-collision plate of a steel casing for splicing broken bored piles proposed in this utility model;

[0024] Figure 4 for Figure 3 Enlarged view of point B.

[0025] Legend:

[0026] 1. Protective plate; 2. Hole; 3. Wedge block; 4. Fixing plate; 5. Screw; 6. Damper; 7. Spring; 8. Anti-collision plate. Detailed Implementation

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

[0028] Reference Figures 1 to 2 This utility model provides an embodiment of a steel casing for splicing broken bored piles, comprising three protective plates 1. The protective plates 1 serve as components of the steel casing. Due to the large contact area between the entire casing and the soil under specific geological conditions (silty soil strata), large-diameter casings (1.8 meters in diameter and above) are difficult to pull out due to enormous passive earth pressure. Dividing the casing into three protective plates 1 reduces the earth pressure on each part to 1 / 3 of the overall pressure when pulled out, facilitating extraction and reuse. Furthermore, it provides temporary protection during excavation, pile splicing, and other work.

[0029] Multiple protective plates 1 have holes 2 on their exterior. The purpose of the holes 2 is twofold: firstly, when the protective casing is driven 2-3 meters below the defect, it may be convenient for construction equipment (such as a vibratory hammer) to connect with the protective plate 1 to realize the sinking operation of the protective casing; secondly, when pulling out the steel protective casing, the holes 2 near the top of the steel plate facilitate the lifting operation of the protective plate 1 by lifting equipment (such as pneumatic punching equipment with lifting tools), making it easy to pull out.

[0030] Multiple wedge blocks 3 are installed at the contact points of the multiple protective plates 1. The function of the wedge blocks 3 is to insert into the connection points of the protective plates 1 when the casing is driven into the defect area, so that the three protective plates 1 are combined into a whole steel casing, ensuring the integrity and stability of the casing to withstand the earth pressure and other forces during underground work. When pulling out the steel casing, after loosening the screws 5 connecting the arc-shaped steel plates (i.e., protective plates 1), the wedge blocks 3 detach from the casing, and some soil enters the shaft from the position of the wedge blocks 3, thereby reducing the passive earth pressure on the casing and facilitating the extraction of the casing.

[0031] Multiple wedge blocks 3 are all fixedly connected to connecting components for connecting and fixing multiple protective plates 1. The function of the connecting components is to firmly connect multiple protective plates 1 together to form a stable integral steel casing structure, so that it can maintain its integrity when working underground, withstand soil pressure and other external forces, and ensure the protection of workers and the construction environment during the process of splicing broken bored piles.

[0032] The connecting assembly has two screws 5 on its external threaded connection. The screws 5 are used to further tighten the connection between the connecting assembly (such as the fixing plate 4) and the protective plate 1 by threading them together. This ensures that the protective plates 1 will not loosen or separate due to external forces during the casing's sinking and operation, thus guaranteeing the structural strength and stability of the casing. This connection method allows the screws 5 to firmly fix the fixing plate 4 to the wedge block 3, thereby making the connection between the wedge block 3 and the protective plate 1 tighter. During casing operation, this ensures that the connections between the parts will not loosen due to stress, maintaining the normal working state of the casing. This allows the protective plates 1, after being assembled into the casing, to work together to withstand external soil pressure and other forces, ensuring the safety and reliability of the casing during the splicing of broken bored piles.

[0033] The connecting assembly includes multiple fixing plates 4, which are externally fixed to the outside of the wedge block 3. The screws 5 are externally threaded to the outside of the fixing plates 4 and externally threaded to the outside of the guard plate 1.

[0034] Reference Figure 3 and Figure 4 The protective plate 1 is externally fixedly connected to a protective component for protection. The function of the protective component is to protect the protective plate 1 during transportation when it is subjected to impact, preventing the protective plate 1 from being damaged by large impact forces, thereby ensuring the integrity and usability of the protective plate 1 and reducing the cost and time loss caused by transportation damage.

[0035] A spring 7 is fitted onto the outside of the protective assembly, and a crash plate 8 is fixedly connected to the outside of the protective assembly. The function of the crash plate 8 is to first withstand the external impact force during the transportation of the protective plate 1. When impacted, the crash plate 8 will transfer the impact force to the damper 6 and the spring 7, which will absorb the impact force and protect the protective plate 1 from direct impact damage, thereby improving the safety of the protective plate 1 during transportation. After arriving at the installation location, the damper 6, spring 7, and crash plate 8 can be removed from the outside of the protective plate 1.

[0036] The protective assembly includes multiple dampers 6, one end of which is fixedly connected to the outside of the guard plate 1 and the other end of which is fixedly connected to the outside of the crash barrier 8. One end of the spring 7 is fixedly connected to the outside of the guard plate 1 and the other end of the spring 7 is fixedly connected to the outside of the crash barrier 8.

[0037] Working principle: First, the guard plate 1 needs to be transported to the construction site. During transportation, if the guard plate 1 is subjected to external impact, the crash barrier 8 first absorbs the impact force, and then transfers the impact force to the damper 6 and spring 7. Through their buffering and absorption effects, the guard plate 1 is protected from damage. After arriving at the construction site, the damper 6, spring 7, and crash barrier 8 are removed from the outside of the guard plate 1 to facilitate the subsequent installation of the casing.

[0038] Place three protective plates 1 at the construction site for splicing broken bored piles. Insert wedge blocks 3 into the contact points of the protective plates 1. Securely connect the protective plates 1 together using the fixing plates 4 and screws 5 in the connecting assembly to form a single steel casing. Use construction equipment such as a vibratory hammer to connect to the holes 2 on the protective plates 1 and drive the assembled steel casing 2-3 meters below the defect.

[0039] After the steel casing is lowered into place, excavation and pile splicing work begins to address broken piles in the bored cast-in-place piles. At this stage, the assembled steel casing can withstand underground soil pressure and other forces, providing temporary protection and ensuring the safety of workers and the construction environment. During the work, the connection points of the casing must be checked regularly to ensure that screws 5 are not loose, wedge blocks 3 are not displaced, and the overall structure of the casing is stable.

[0040] After completing the splicing of broken bored piles, the steel casing needs to be removed. First, loosen the screws 5 connecting the casing plate 1, allowing the wedge block 3 to disengage from the casing. At this point, some soil enters the shaft from the wedge block 3, reducing the passive earth pressure on the casing. Then, use a pneumatic extraction device with a lifting tool connected to the hole 2 at the top of the casing plate 1 to pull out the three casing plates 1 in sequence. Because the casing is divided into three parts, the earth pressure is reduced to 1 / 3 of the total pressure when each part is pulled out, facilitating the extraction operation.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing 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. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A steel casing for splicing broken bored piles, comprising three casing plates (1), characterized in that: The exterior of each of the multiple protective plates (1) is provided with holes (2), and multiple wedge blocks (3) are provided at the contact points of the multiple protective plates (1). The exterior of each of the multiple wedge blocks (3) is fixedly connected with a connecting component for connecting and fixing the multiple protective plates (1). The external thread of the connecting component is connected with two screws (5).

2. A steel casing for splicing broken bored piles according to claim 1, characterized in that: The connecting assembly includes multiple fixing plates (4), the external of which is fixedly connected to the outside of the wedge block (3), and the external thread of the screw (5) is connected to the outside of the fixing plates (4).

3. A steel casing for splicing broken bored piles according to claim 1, characterized in that: The protective plate (1) is fixedly connected to a protective component for protection. A spring (7) is sleeved on the outside of the protective component, and a crash plate (8) is fixedly connected to the outside of the protective component.

4. A steel casing for splicing broken bored piles according to claim 1, characterized in that: The screw (5) is externally threaded onto the outside of the guard plate (1).

5. A steel casing for splicing broken bored piles according to claim 3, characterized in that: The protective assembly includes a plurality of dampers (6), one end of which is fixedly connected to the outside of the guard plate (1), and the other end of which is fixedly connected to the outside of the crash plate (8).

6. A steel casing for splicing broken bored piles according to claim 3, characterized in that: One end of the spring (7) is fixedly connected to the outside of the guard plate (1), and the other end of the spring (7) is fixedly connected to the outside of the anti-collision plate (8).

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