Steel casing for construction of a cast-in-place pile

Abstract

The utility model discloses a steel casing for bored pile construction, concretely relates to steel casing technical field, including steel casing body, wherein, the steel casing body is the cylindrical structure that a plurality of arc plate splices, and the one end of a plurality of arc plate is all fixedly installed with the plug -in block, and the other end outer wall is provided with the slot, the outer wall both sides of plug -in block all are fixedly installed with the sealing strip, and the outer wall of a plurality of arc plate splicing and being formed steel casing body is provided with first fixed component, second fixed component and third fixed component from top to bottom respectively. The steel casing of the utility model can conveniently operate personnel to splice and dismount, and the process is convenient to transport, and in the process of splicing, can quickly fix a plurality of arc plate, improve splicing efficiency, and the operator uses conveniently.

Description

Technical Field

[0001] This utility model relates to the field of steel casing technology, and more specifically, to a steel casing for cast-in-place pile construction. Background Technology

[0002] Cast-in-place piles are a common type of pile foundation widely used in civil engineering. They are formed by pouring cement or concrete underground to support the foundation of buildings or other engineering structures. During construction, a hole is first dug underground, then steel bars are placed into the hole and concrete or cement is poured in. Steel casing plays an important role in the construction of cast-in-place piles. It serves to position the pile, protect the borehole opening, maintain the mud level, control the pile top elevation, prevent sediment backflow, guide the drilling direction, isolate surface water, and enhance the bearing capacity.

[0003] A search revealed that Chinese patent CN222541492U discloses a steel casing for cast-in-place piles. This steel casing can be freely disassembled and assembled, making it easier to transport and use.

[0004] However, in actual use, after assembling several arc-shaped plates, the lower ring, middle ring, and upper fixing parts need to be fitted onto the lower, middle, and upper parts of the steel casing using a nesting method, and then tightened with the arc-shaped plates using the first, second, and third fastening bolts. However, this method requires ensuring that the threaded holes on the surfaces of the lower ring, middle ring, and upper fixing parts correspond one-to-one with the threaded holes on the surface of the arc-shaped plates before installation can be performed using the fastening bolts. This is inconvenient during operation and affects assembly efficiency. In view of this, this utility model proposes a steel casing for cast-in-place pile construction. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a steel casing for cast-in-place pile construction to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a steel casing for cast-in-place pile construction, comprising a steel casing body, wherein the steel casing body is a cylindrical structure assembled from several arc-shaped plates, one end of each of the arc-shaped plates is fixedly installed with an insert block, and the outer wall of the other end is provided with a slot, both sides of the outer wall of the insert block are fixedly installed with sealing strips, the insert block and the slot structure are adapted to each other, and the width of the slot is equal to the sum of the widths of the insert block and the two sealing strips.

[0007] It can be seen that the steel casing body of the cast-in-place pile construction steel casing is a cylindrical structure assembled from several arc-shaped plates. One end of the arc-shaped plate is provided with an insert block and the outer wall of the other end is provided with a slot. The insert block and the slot are structurally compatible and the width of the slot is equal to the sum of the width of the insert block and the width of the two sealing strips, thereby achieving assembly and sealing.

[0008] Preferably, the outer walls of several steel casing bodies spliced ​​from the arc-shaped plates are respectively provided with a first fixing component, a second fixing component, and a third fixing component from top to bottom. Three T-shaped positioning blocks are fixedly installed on the outer walls of each of the arc-shaped plates. The first fixing component, the second fixing component, and the third fixing component are all configured to have the same shape and structure. The first fixing component, the second fixing component, and the third fixing component all include two symmetrically distributed semicircular rings. The two symmetrically distributed semicircular rings are installed on the outer wall of the steel casing. The inner wall of the semicircular ring is provided with a T-shaped positioning groove that matches the structure of the T-shaped positioning block. Two positioning plates are fixedly installed at both ends of the semicircular ring. Positioning bolts are threaded on the surface of the positioning plates. Several lifting rings are fixedly installed on the two semicircular rings to which the first fixing component belongs.

[0009] This structure is designed to enhance the connection stability of the steel casing body, which is composed of several curved plates, and to meet hoisting requirements.

[0010] Preferably, one of the arc-shaped plates has a drain outlet through its outer wall to drain the mud and water generated inside the borehole.

[0011] The technical effects and advantages of this utility model are as follows: By setting up several fixing components including T-shaped positioning grooves, positioning plates, and positioning bolts, as well as T-shaped positioning blocks on the outer wall of the arc-shaped plate, the fixing components can be quickly positioned and installed with the help of the cooperation of the T-shaped positioning grooves and T-shaped positioning blocks. Then, by reinforcing with positioning bolts, the connection stability and assembly efficiency of the arc-shaped plate splicing can be significantly enhanced, preventing the steel casing from deforming or loosening due to stress during construction. Compared with the existing method of installing the ring body and then fastening it with bolts and screw holes, it can reduce the positioning and installation time of the ring body and improve the assembly efficiency. At the same time, the lifting ring on the first fixing component facilitates the lifting operation of the steel casing, improving the convenience of construction. The arc-shaped plate assembly structure, consisting of inserts, slots, and sealing strips, allows the steel casing to be quickly assembled by fitting the inserts and slots together. At the same time, the sealing strips fill the gaps between the inserts and slots, effectively preventing mud leakage during construction. This simplifies the on-site assembly process, improves installation efficiency, ensures the sealing performance of the steel casing, and reduces construction problems caused by mud leakage. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the structure after the several arc-shaped plates of this utility model are assembled.

[0014] Figure 3This is a schematic diagram of a partial structure of the surface of a single arc-shaped plate according to the present invention.

[0015] Figure 4 This is a schematic diagram of the connection structure of the two semi-circular rings of this utility model.

[0016] Figure 5 For the present utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0017] The attached figures are labeled as follows: 1. Steel casing body; 100. Arc plate; 101. Insert block; 102. Slot; 103. Sealing strip; 2. First fixing component; 3. Second fixing component; 4. Third fixing component; 5. T-shaped positioning block; 6. Semicircular ring; 7. T-shaped positioning groove; 8. Positioning plate; 9. Positioning bolt; 10. Lifting ring; 11. Drain outlet. Detailed Implementation

[0018] 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.

[0019] As attached Figure 1-5 The steel casing for cast-in-place pile construction shown includes a steel casing body 1, which is a cylindrical structure assembled from several arc-shaped plates 100. Each of the arc-shaped plates 100 has a fixed insert 101 at one end and a slot 102 on the outer wall of the other end. Sealing strips 103 are fixedly installed on both sides of the outer wall of the insert 101. The insert 101 and the slot 102 are structurally compatible, and the width of the slot 102 is equal to the sum of the widths of the insert 101 and the two sealing strips 103.

[0020] Specifically, in this structure, the steel casing body 1 is assembled from several arc-shaped plates 100. During assembly, the insert block 101 at one end of one arc-shaped plate 100 is inserted into a slot 102 in another arc-shaped plate 100 to form a cylindrical steel casing body 1. This facilitates disassembly and on-site assembly. After the steel casing body 1 is assembled from several arc-shaped plates 100, the sealing strip 103 on the surface of the insert block 101 increases the sealing at the assembly points of the arc-shaped plates 100, preventing mud leakage during use. In this embodiment, as shown in the appendix Figure 1 , 2As shown in Figures 4 and 5, the outer walls of several steel casing bodies 1, which are spliced ​​from several arc-shaped plates 100, are respectively provided with a first fixing component 2, a second fixing component 3, and a third fixing component 4 from top to bottom. Three T-shaped positioning blocks 5 are fixedly installed on the outer walls of several arc-shaped plates 100. The first fixing component 2, the second fixing component 3, and the third fixing component 4 are all designed to have the same shape and structure. The first fixing component 2, the second fixing component 3, and the third fixing component 4 each include two symmetrically distributed semicircular rings 6. The two symmetrically distributed semicircular rings 6 are installed on the outer walls of the steel casing. The inner walls of the semicircular rings 6 are provided with T-shaped positioning grooves 7 that are adapted to the structure of the T-shaped positioning blocks 5. Two positioning plates 8 are fixedly installed at both ends of the semicircular rings 6. Positioning bolts 9 are threaded on the surface of the positioning plates 8. Several lifting rings 10 are fixedly installed on the two semicircular rings 6 belonging to the first fixing component 2.

[0021] Specifically, in this structure, after several arc-shaped plates 100 are assembled, the first fixing component 2, the second fixing component 3 and the third fixing component 4 are installed from top to bottom on the outer wall of the steel casing body 1 to enhance the stability of the connection between the several arc-shaped plates 100. In specific operation; The T-shaped positioning grooves 7 on the surfaces of the two semicircular rings 6 are guided and inserted along the T-shaped positioning blocks 5 on the outer walls of several arc-shaped plates 100, so that the two semicircular rings 6 are quickly positioned and installed on the outer wall of the steel casing body 1. The cooperation of the T-shaped positioning grooves 7 and the T-shaped positioning blocks 5 can prevent the semicircular rings 6 from detaching from the outer wall of the steel casing body 1. After the two semicircular rings 6 are installed together on the outer wall of the steel casing body 1, the positioning plates 8 at both ends of the two semicircular rings 6 are quickly connected, and the two connected positioning plates 8 are finally fixed by the positioning bolts 9, thus completing the installation of several fixing components. This method can be used to install the first fixing component 2, the second fixing component 3 and the third fixing component 4 respectively. Several lifting rings 10 are fixedly installed on the two semicircular rings 6 belonging to the first fixing component 2. Ropes can be tied inside the lifting rings 10, and the steel casing body 1 can be lowered into the borehole by the crane driving the ropes. The number of lifting rings 10 is the same as the number of arc plates 100, which makes the stability better during hoisting.

[0022] In this embodiment, as shown in the appendix Figure 1 , 2 As shown, a drain outlet 11 is provided through the outer wall of one of the arc-shaped plates 100 to drain the mud water generated inside the borehole.

[0023] Working principle of this utility model: This application provides a steel casing for cast-in-place pile construction. In specific use, firstly, the steel casing body 1 is assembled. Since the steel casing body 1 is composed of several arc-shaped plates 100, during assembly, the insert 101 at one end of one arc-shaped plate 100 is inserted into the slot 102 opened on the outer wall of the other end of another arc-shaped plate 100. Through the matching and cooperation of the insert 101 and the slot 102, several arc-shaped plates 100 are connected in sequence to form a cylindrical steel casing body 1. At the same time, the sealing strips 103 fixed on both sides of the outer wall of the insert 101 will tightly fit the inner wall of the slot 102, effectively enhancing the sealing of the arc-shaped plate 100 assembly and preventing mud leakage during subsequent use. After several arc-shaped plates 100 are assembled into a steel casing body 1, the first fixing component 2, the second fixing component 3, and the third fixing component 4 are installed in order from top to bottom. During installation, the T-shaped positioning groove 7 on the inner wall of each semi-circular ring 6 is inserted along the T-shaped positioning block 5 fixed on the arc-shaped plate 100 on the outer wall of the steel casing body 1. With the cooperation of the T-shaped positioning groove 7 and the T-shaped positioning block 5, the semi-circular ring 6 can be quickly positioned on the outer wall of the steel casing, and the semi-circular ring 6 can be prevented from detaching from the outer wall of the steel casing. When two semi-circular rings 6 are connected to the outer wall of the steel casing, the positioning plates 8 at both ends are also connected. At this time, the connected positioning plates 8 are fixed by installing positioning bolts 9 on the surface of the positioning plates 8, thereby completing the installation of a single fixing component. Through the joint action of the three fixing components, the stability of the connection between several arc-shaped plates 100 is greatly improved. A rope is tied inside the lifting ring 10, and the crane lowers the steel casing body 1 into the borehole by driving the rope. The mud and water generated inside the borehole are discharged outward through the drain outlet 11. The mud and water enter the drainage ditch and are discharged outward. The cast-in-place pile steel casing can be disassembled and quickly assembled, which is convenient for transportation.

[0024] In summary, the difference between this application and the existing technical solution is that the method of installation and fixing with fastening bolts in the existing technology is changed to a method in which two semicircular rings 6 are quickly positioned and installed through T-shaped positioning grooves 7 and T-shaped positioning blocks 5, and the two positioned semicircular rings 6 are fastened with positioning bolts 9. This method can not only improve the stability of several assembled arc plates 100, but also reduce the burden of matching threaded holes one by one, and improve assembly efficiency.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 cast-in-place pile construction, comprising a steel casing body (1), characterized in that: The steel casing body (1) is a cylindrical structure assembled from several arc-shaped plates (100). Each of the arc-shaped plates (100) has a fixed insert (101) at one end and a slot (102) on the outer wall of the other end. Both sides of the outer wall of the insert (101) are fixedly fitted with sealing strips (103). The outer wall of the steel casing body (1) assembled from several arc-shaped plates (100) is provided with a first fixing component (2), a second fixing component (3) and a third fixing component (4) from top to bottom.

2. The steel casing for cast-in-place pile construction according to claim 1, characterized in that: Each of the arc-shaped plates (100) has three T-shaped positioning blocks (5) fixedly installed on its outer wall. The first fixing component (2), the second fixing component (3) and the third fixing component (4) are all set to have the same shape and structure.

3. The steel casing for cast-in-place pile construction according to claim 1, characterized in that: The first fixing component (2), the second fixing component (3) and the third fixing component (4) each include two symmetrically distributed semicircular rings (6). The two symmetrically distributed semicircular rings (6) are installed on the outer wall of the steel casing body (1). The inner wall of the semicircular ring (6) is provided with a T-shaped positioning groove (7) that is adapted to the structure of the T-shaped positioning block (5).

4. The steel casing for cast-in-place pile construction according to claim 3, characterized in that: Two positioning plates (8) are fixedly installed at both ends of the semicircular ring (6). Positioning bolts (9) are threaded on the surface of the positioning plates (8). Several lifting rings (10) are fixedly installed on the two semicircular rings (6) belonging to the first fixing component (2).

5. The steel casing for cast-in-place pile construction according to claim 1, characterized in that: The insert (101) is adapted to the structure of the slot (102), and the width of the slot (102) is equal to the sum of the widths of the insert (101) and the two sealing strips (103).

6. A steel casing for cast-in-place pile construction according to claim 1, characterized in that: One of the arc-shaped plates (100) has a drain outlet (11) through its outer wall to drain the mud water generated inside the borehole.

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