Steel casing extension structure for deepwater pile foundation construction
By using sealing components and waterproof materials to seal the weld seams of steel casings during deep-water pile foundation construction, the problem of steel reinforcement corrosion caused by weld seepage was solved, thereby improving the bearing capacity and durability of the pile foundation.
Patent Information
- Application Number
- CN202520065596.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-01-13
AI Technical Summary
During deep-water pile foundation construction, defects such as pores and cracks that are difficult to detect may exist at the weld seams. Seawater can seep into the concrete pile foundation through the weld seams, causing steel reinforcement corrosion and affecting the bearing capacity and durability of the pile foundation.
The steel casing is extended, and the sealing components include an inner cylinder, an upper ring, and a lower ring. The inner cylinder is inserted into the steel casing, welded and fixed, and then filled with waterproof material such as polyurethane waterproof sealant or epoxy resin to cover the weld seam. The sealing effect is enhanced by strips and resistance strips.
It effectively seals welds, prevents seawater penetration, avoids steel reinforcement corrosion, and improves the protective performance of steel casings and the stability of pile foundations.
Smart Images
Figure CN223688909U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pile foundation construction technical field especially relates to a deep water pile foundation construction steel casing lengthening structure. BACKGROUND
[0002] Deep water pile foundation construction refers to the pile foundation construction in the water area with large water depth or high water level, and is usually used for the foundation engineering of large-scale buildings, bridges, wharfs, wind power platforms and the like in the water area such as lakes and oceans. When the deep water pile foundation construction is carried out, the steel casing needs to be driven into the foundation, drilling and sand cleaning are carried out inside the steel casing, and then the concrete is poured into the steel casing, and meanwhile the steel reinforcement cage needs to be inserted, the concrete is solidified inside the steel casing, and a solid pile body is gradually formed. The steel casing is mainly used for protecting the drilling hole during the construction process, preventing the water flow, silt or surrounding soil layer from causing the collapse or deformation of the drilling hole wall, and ensuring the construction stability of the pile foundation.
[0003] When the water depth of the construction position exceeds a certain height, the steel casing needs to be lengthened to ensure that it can still play a protective role in the deeper water area. Usually, the welding method is used to weld and fix two steel casings together to achieve the purpose of lengthening the steel casing. However, there may be defects such as pores and cracks in the welding seam that are difficult to find, seawater can seep into the concrete pile foundation through the welding seam, and the salt in the seawater can promote the corrosion of the steel reinforcement, reduce the tensile strength of the steel reinforcement, and further affect the bearing capacity and durability of the pile foundation. UTILITY MODEL CONTENTS
[0004] The utility model provides a deep water pile foundation construction steel casing lengthening structure, solves the problem that the welding seam may have defects such as pores and cracks that are difficult to find in the background art, seawater can seep into the concrete pile foundation through the welding seam, and the salt in the seawater can promote the corrosion of the steel reinforcement.
[0005] To achieve the above object, the utility model provides the following technical scheme: a deep water pile foundation construction steel casing lengthening structure, including steel casing one, steel casing two and sealing assembly, one end of steel casing one is provided with steel casing two, sealing assembly is arranged at the butt joint of steel casing one and steel casing two, the end face of one end of steel casing one is provided with ring groove no. 1, the end face of one end of steel casing two is provided with ring groove no. 2, sealing assembly includes inner tube, upper circular ring and lower circular ring, the inner tube is located in the inside of steel casing one, one end opening of the inner tube is fixedly connected with upper circular ring, the other end opening of the inner tube is fixedly connected with lower circular ring, the upper circular ring is abutted at the bottom of ring groove no. 2, the lower circular ring is abutted at the bottom of ring groove no. 1, the outer circle diameter of upper circular ring and lower circular ring is equal and greater than the outer circle diameter of the inner tube, the outer circumferential side surface of the inner tube and the inner wall between ring groove no. 1 and ring groove no. 2 form pouring cavity, and the pouring cavity is filled with waterproof material.
[0006] Preferably, the outer circumferential diameter and the inner circumferential diameter of the steel casing one and the steel casing two are equal, the inner circumferential diameter of the inner tube is equal to the inner circumferential diameter of the upper ring and the lower ring, and the inner circumferential diameter of the inner tube is equal to the inner circumferential diameter of the steel casing one.
[0007] Preferably, the waterproof material is one of polyurethane waterproof sealant or epoxy resin.
[0008] Preferably, a plurality of long strips are fixedly connected to the outer circumferential side of the inner tube, and the plurality of long strips are circumferentially arranged around the central axis of the inner tube.
[0009] Preferably, a plurality of resistance increasing strips are arranged between two adjacent long strips, and the resistance increasing strips are fixed to the outer circumferential side of the inner tube.
[0010] Preferably, a pouring port is formed through the circumferential side of the inner tube, and an overflow port is arranged opposite to the pouring port and formed through the circumferential side of the inner tube.
[0011] Preferably, the pouring port and the overflow port are arranged close to the bottom surface of the upper ring.
[0012] Preferably, an overflow indication groove is formed in the inner circumferential side of the inner tube, and the overflow port is located at the middle position of the overflow indication groove.
[0013] Preferably, a pouring pipe is detachably inserted into the pouring port.
[0014] Preferably, a plurality of fixing heads are fixedly connected to the bottom surface of the ring groove one, the plurality of fixing heads are circumferentially arranged around the central axis of the steel casing one, a plurality of limiting holes are formed in the bottom surface of the lower ring and circumferentially arranged around the central axis of the inner tube, and the plurality of fixing heads are respectively inserted into the plurality of limiting holes.
[0015] Compared with the prior art, the utility model has the advantages that:
[0016] 1. The limiting hole on the lower ring is aligned with the fixing head on the ring groove one, the inner tube is knocked down and pressed, the fixing head is inserted into the limiting hole, the sealing assembly is then fixed on the steel casing two, one end of the lower ring of the inner tube is placed on the bottom of the ring groove one, the outer circumferential side of the lower ring is tightly attached to the inner side wall of the ring groove one, the end of the steel casing two provided with the ring groove two is aligned and connected with the steel casing one, the inner tube is inserted into the steel casing two, the outer circumferential side of the upper ring of the inner tube is tightly attached to the inner side wall of the ring groove two, the joint of the steel casing one and the steel casing two is welded, the steel casing one and the steel casing two are fixed together, and the lengthening effect of the steel casing is achieved.
[0017] 2. Insert the bent end of the injection tube into the pouring port, fill the waterproof material into the injection tube, so that the waterproof material can fill the injection cavity, the position filled by the waterproof material covers the welding seam between the first steel casing and the second steel casing, the filling height size is larger than the width size of the welding seam, after the waterproof material solidifies, the welding seam position is completely sealed, seawater can be prevented from penetrating into the inside of the steel casing through the welding seam, when the inside of the injection cavity is filled, overflow from the overflow port to the overflow indication groove, indicating the operator to stop injecting the waterproof material, then taking out the injection tube, after the waterproof material solidifies, the long strip and the resistance increasing strip are covered and bonded on the outer circumferential side surface of the two and the inner cylinder, at the same time, the waterproof material is also bonded on the inner side wall of the ring groove one and the ring groove two, the long strip and the resistance increasing strip increase the contact area of the waterproof material and the inner cylinder, and can also increase the resistance of relative sliding between the waterproof material and the inner cylinder, so as to ensure the sealing effect of the waterproof material. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a deep water pile construction steel casing lengthening structure schematic view of the utility model;
[0019] Figure 2 It is a steel casing one structure schematic view of the utility model;
[0020] Figure 3 It is a steel casing two structure schematic view of the utility model;
[0021] Figure 4 It is a sealing assembly installation position structure schematic view of the utility model;
[0022] Figure 5 It is a sealing assembly structure schematic view of the utility model;
[0023] Figure 6 It is a sealing assembly and steel casing one cooperation structure schematic view of the utility model;
[0024] Figure 7 It is a injection cavity position structure schematic view of the utility model;
[0025] Figure 8 It is a limiting hole opening position structure schematic view of the utility model.
[0026] Marked number in drawing: 1, steel casing one; 11, ring groove one; 12, fixed head; 2, steel casing two; 21, ring groove two; 3, sealing assembly; 31, inner cylinder; 311, pouring port; 312, overflow port; 313, overflow indication groove; 32, upper circular ring; 33, lower circular ring; 331, limiting hole; 34, long strip; 341, resistance increasing strip; 4, injection cavity; 5, injection tube. DETAILED DESCRIPTION
[0027] Clearly, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the present utility model.
[0028] The utility model provides a kind of deep water pile foundation construction steel casing lengthening structure, as shown in Figure 1 And Figure 4 As shown, it includes steel casing one 1, steel casing two 2 and sealing assembly 3, steel casing one 1 one end is provided with steel casing two 2, sealing assembly 3 is arranged at the butt joint of steel casing one 1 and steel casing two 2, as shown in Figure 2 And Figure 3 As shown, ring groove one 11 is opened in the end face of one end of steel casing one 1, ring groove two 21 is opened in the end face of one end of steel casing two 2, sealing assembly 3 includes inner tube 31, upper circular ring 32 and lower circular ring 33, inner tube 31 is located in the inside of steel casing one 1, as shown in Figure 5 As shown, one end opening of inner tube 31 is fixedly connected with upper circular ring 32, the other end opening of inner tube 31 is fixedly connected with lower circular ring 33, upper circular ring 32 is abutted at the bottom of ring groove two 21, lower circular ring 33 is abutted at the bottom of ring groove one 11.The outer diameter and inner diameter of steel casing one 1 and steel casing two 2 are equal, the inner diameter of inner tube 31 and the inner diameter of upper circular ring 32 and lower circular ring 33 are equal, the inner diameter of inner tube 31 and the inner diameter of steel casing one 1 are equal, can guarantee the outer peripheral surface of subsequent poured concrete pile foundation smooth.Put lower circular ring 33 one end of inner tube 31 at the bottom of ring groove one 11, the outer peripheral side surface of lower circular ring 33 is tightly attached on the inner side wall of ring groove one 11, the one end of steel casing two 2 opened with ring groove two 21 is aligned and butt jointed with steel casing one 1, inner tube 31 is inserted into steel casing two 2, the outer peripheral side surface of upper circular ring 32 of inner tube 31 is tightly attached on the inner side wall of ring groove two 21, inner tube 31 is arranged in the inside of steel casing one 1 and steel casing two 2, the butt joint of steel casing one 1 and steel casing two 2 is welded, steel casing one 1 and steel casing two 2 are fixed together, reach the lengthening effect of steel casing.
[0029] As shown in Figure 6 And Figure 7As shown, the outer circle diameter of the upper circular ring 32 and the lower circular ring 33 is equal and larger than the outer circle diameter of the inner cylinder 31, the outer peripheral side surface of the inner cylinder 31 and the inner wall between the ring groove one 11 and the ring groove two 21 form a pouring cavity 4, a pouring port 311 is provided on the peripheral side surface of the inner cylinder 31, an overflow port 312 is provided opposite to the pouring port 311, and the overflow port 312 is provided on the peripheral side surface of the inner cylinder 31. The pouring port 311 and the overflow port 312 are provided close to the bottom surface of the upper circular ring 32. An overflow indicating groove 313 is provided on the inner peripheral side surface of the inner cylinder 31, and the overflow port 312 is located at the middle position of the overflow indicating groove 313. The pouring pipe 5 is detachably inserted into the pouring port 311, the pouring cavity 4 is filled with waterproof material, and the waterproof material can be selected from one of polyurethane waterproof sealant or epoxy resin. The elbow end of the pouring pipe 5 is inserted into the pouring port 311, the waterproof material is poured into the pouring pipe 5, so that the waterproof material can fill the pouring cavity 4, the waterproof material filling position covers the welding seam between the steel casing one 1 and the steel casing two 2, the filling height dimension is larger than the width dimension of the welding seam, after the waterproof material solidifies, the welding seam position is completely sealed, and seawater can be prevented from penetrating into the steel casing. When the pouring cavity 4 is filled, the overflow port 312 overflows into the overflow indicating groove 313, indicating the operator to stop pouring the waterproof material, and then the pouring pipe 5 is taken out.
[0030] As shown in Figure 6 and Figure 8 A plurality of fixed heads 12 are fixedly connected to the bottom surface of the ring groove one 11, the plurality of fixed heads 12 are circumferentially arrayed around the central axis of the steel casing one 1, a plurality of limiting holes 331 are provided on the bottom surface of the lower circular ring 33, the plurality of limiting holes 331 are circumferentially arrayed around the central axis of the inner cylinder 31, the plurality of fixed heads 12 are respectively inserted into the plurality of limiting holes 331, the diameter size of the opening of the limiting hole 331 is slightly smaller than the inner diameter size, the inner diameter size of the limiting hole 331 is equal to the end diameter size of the fixed head 12, the opening of the limiting hole 331 is internally chamfered, which can make the fixed head 12 more easily enter the hole during assembly, and the end of the fixed head 12 is not easy to come out after entering the inner part of the limiting hole 331. When the inner cylinder 31 is placed on the bottom surface of the ring groove one 11, the limiting hole 331 on the lower circular ring 33 is aligned with the fixed head 12 on the ring groove one 11, the inner cylinder 31 is knocked down and pressed, the fixed head 12 is inserted into the limiting hole 331, and then the sealing assembly 3 is fixed on the steel casing two 2.
[0031] As shown in Figure 5As shown, the outer peripheral side of the inner cylinder 31 is fixedly connected with a plurality of long strips 34, which are arranged in a circle around the central axis of the inner cylinder 31. The long strips 34 protrude outward, but there is still a gap between the long strips 34 and the inner side walls of the ring groove one 11 and the ring groove two 21. A plurality of resistance increasing strips 341 are arranged between two adjacent long strips 34, and the resistance increasing strips 341 are fixed on the outer peripheral side of the inner cylinder 31. The protruding length of the resistance increasing strips 341 is smaller than that of the long strips 34, and the long strips 34 and the resistance increasing strips 341 are both vertically arranged along the direction of the central axis on the outer peripheral side of the inner cylinder 31. After the waterproof material solidifies, the long strips 34 and the resistance increasing strips 341 are covered and bonded on the outer peripheral side of the inner cylinder 31 and the long strips 34 and the resistance increasing strips 341, and the waterproof material is also bonded on the inner side walls of the ring groove one 11 and the ring groove two 21. The long strips 34 and the resistance increasing strips 341 increase the contact area between the waterproof material and the inner cylinder 31, and also increase the resistance to relative sliding between the waterproof material and the inner cylinder 31, thereby ensuring the sealing effect of the waterproof material.
[0032] As shown in the drawings, Figure 1 and Figure 2 The lower circular ring 33 on the limiting hole 331 is aligned with the fixed head 12 on the ring groove one 11, the inner cylinder 31 is knocked and pressed downward, the fixed head 12 is inserted into the limiting hole 331, and then the sealing assembly 3 is fixed on the steel casing two 2. One end of the lower circular ring 33 of the inner cylinder 31 is placed at the bottom of the ring groove one 11, and the outer peripheral side of the lower circular ring 33 is tightly attached to the inner side wall of the ring groove one 11. One end of the ring groove two 21 of the steel casing two 2 is aligned and connected with the steel casing one 1, the inner cylinder 31 is inserted into the steel casing two 2, the outer peripheral side of the upper circular ring 32 of the inner cylinder 31 is tightly attached to the inner side wall of the ring groove two 21, the joint of the steel casing one 1 and the steel casing two 2 is welded, the steel casing one 1 and the steel casing two 2 are fixed together, and the lengthening effect of the steel casing is achieved. The bent pipe end of the pouring pipe 5 is inserted into the pouring opening 311, the waterproof material is poured into the pouring pipe 5, so that the waterproof material can fill the pouring cavity 4. The position filled with the waterproof material covers the welding seam between the steel casing one 1 and the steel casing two 2, and the filling height dimension is larger than the width dimension of the welding seam. After the waterproof material solidifies, the welding seam position is completely sealed, and seawater can be prevented from penetrating into the steel casing through the welding seam. When the pouring cavity 4 is filled, the overflow will overflow from the overflow port 312 into the overflow indicating groove 313, indicating the operator to stop pouring the waterproof material, and then the pouring pipe 5 is taken out. After the waterproof material solidifies, the long strips 34 and the resistance increasing strips 341 are covered and bonded on the outer peripheral side of the inner cylinder 31 and the long strips 34 and the resistance increasing strips 341, and the waterproof material is also bonded on the inner side walls of the ring groove one 11 and the ring groove two 21. The long strips 34 and the resistance increasing strips 341 increase the contact area between the waterproof material and the inner cylinder 31, and also increase the resistance to relative sliding between the waterproof material and the inner cylinder 31, thereby ensuring the sealing effect of the waterproof material.
[0033] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and it can be applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein.
Claims
1. A deep water pile foundation construction steel casing lengthening structure, characterized in that, The utility model provides a steel casing, it includes steel casing one (1), steel casing two (2) and sealing assembly (3), one end of steel casing one (1) is provided with steel casing two (2), sealing assembly (3) is arranged at the butt joint of steel casing one (1) and steel casing two (2), the end face of steel casing one (1) is provided with ring groove one (11), the end face of steel casing two (2) is provided with ring groove two (21), sealing assembly (3) includes inner tube (31), upper circular ring (32) and lower circular ring (33), the inside of steel casing one (1) is located inner tube (31), one end opening of inner tube (31) is fixedly connected with upper circular ring (32), the other end opening of inner tube (31) is fixedly connected with lower circular ring (33), upper circular ring (32) is butt joint in the bottom of ring groove two (21), lower circular ring (33) is butt joint in the bottom of ring groove one (11), the outer circle diameter of upper circular ring (32) and lower circular ring (33) is equal and greater than the outer circle diameter of inner tube (31), and the outer peripheral side of inner tube (31) forms injection cavity (4) between the inner wall of ring groove one (11) and ring groove two (21), and injection cavity (4) is filled with waterproof material.
2. A deep water pile construction steel casing lengthening structure according to claim 1, characterised in that, The outer peripheral diameter and the inner peripheral diameter of steel casing one (1) and steel casing two (2) are equal, the inner peripheral diameter of inner tube (31) is equal with the inner peripheral diameter of upper circular ring (32) and lower circular ring (33), and the inner peripheral diameter of inner tube (31) is equal with the inner peripheral diameter of steel casing one (1).
3. The deep water pile construction steel casing lengthening structure according to claim 1, characterized in that, The waterproof material is one of polyurethane waterproof sealant or epoxy resin.
4. The deep water pile construction steel casing splicing structure according to claim 1, characterized in that, A plurality of long strips (34) are fixedly connected to the outer peripheral side of the inner tube (31), and the plurality of long strips (34) are circumferentially arranged around the central axis of the inner tube (31).
5. A deep water pile construction steel casing lengthening structure according to claim 4, characterised in that, A plurality of resistance increasing strips (341) are arranged between two adjacent long strips (34), and the resistance increasing strips (341) are fixed to the outer peripheral side of the inner tube (31).
6. The deep water pile construction steel casing splicing structure according to claim 1, characterized in that, A pouring port (311) is formed through the peripheral side of the inner tube (31), and an overflow port (312) is arranged opposite to the pouring port (311) and formed through the peripheral side of the inner tube (31).
7. A deep water pile construction steel casing lengthening structure according to claim 6, characterised in that, The pouring port (311) and the overflow port (312) are arranged close to the bottom surface of the upper circular ring (32).
8. A deep water pile construction steel casing lengthening structure according to claim 7, characterised in that, An overflow indicating groove (313) is formed in the inner peripheral side of the inner tube (31), and the overflow port (312) is arranged at the middle position of the overflow indicating groove (313).
9. The deep water pile construction steel casing splicing structure according to claim 6, characterized in that, An injection tube (5) is detachably inserted into the pouring port (311).
10. The deep water pile construction steel casing splicing structure according to claim 1, characterized in that, A plurality of fixing heads (12) are fixedly connected to the bottom surface of the ring groove one (11) and circumferentially arranged around the central axis of the steel casing one (1), a plurality of limiting holes (331) are formed in the bottom surface of the lower circular ring (33) and circumferentially arranged around the central axis of the inner tube (31), and the plurality of fixing heads (12) are respectively inserted into the plurality of limiting holes (331).