Concrete diaphragm wall joint pipe
The concrete impermeable wall interface pipe design addresses extraction challenges by using a ring-shaped sleeve and embedded segment with threaded fasteners for a rigid connection, ensuring ease of extraction despite borehole irregularities.
Patent Information
- Application Number
- CN202422469446.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-10-12
AI Technical Summary
The existing concrete anti-seepage wall joint pipes are difficult to pull up when the hole shape is irregular or there are probe stones, blocks falling, or unstable hole walls around the holes. Especially, the joint pipes in the form of male and female joints are difficult to effectively connect when the rotation space is large.
The design of fixing the socket section at one end and the other end of the joint tube body is adopted. By setting positioning holes and connection holes on the socket section and the inner block, threaded fasteners are used to fix the upper and lower joint tubes, forming a rigid connection and reducing the freedom of rotation.
Even under complex geological conditions, the joint pipes can be connected smoothly, reducing the difficulty of starting and pulling up, and improving construction efficiency and safety.
Smart Images
Figure CN223105544U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of construction equipment for connecting segments of diaphragm walls, and particularly relates to a concrete cut-off wall joint pipe. Background Art
[0002] The joint pipe method is an advanced technology for joint treatment in the construction of concrete cut-off walls at present. The construction procedure of the joint pipe method is as follows: before pouring the first-phase slot, joint pipes are set at both ends of the slot. After pouring for a certain time, the joint pipes are gradually pulled out to form a joint hole, and then this joint hole is used as the end hole of the adjacent second-phase slot.
[0003] At present, the joint pipes used in the joint pipe method are joint pipes in the form of male and female joints. The male joint is fixed with two ear plates inside one end of the joint pipe, and the female joint is fixed with an insertion plate at the other end of the joint pipe. The insertion plate extends out of the end of the joint pipe. By inserting the insertion plate in adjacent two joint pipes between the ear plates and then using a single pin to connect the ear plate and the insertion plate, when there is a gap between pipe sections, there will be a certain space for the two joint pipes to rotate freely around the pin. In this way, when the shape of the joint hole is irregular, especially when there are boulders protruding from the hole wall, chunks falling off, and unstable hole walls, etc., it will greatly increase the difficulty of pulling out the joint pipe. Summary of the Utility Model
[0004] In order to solve the above technical problems, the utility model provides a concrete cut-off wall joint pipe, which can reduce the difficulty of pulling out the joint pipe.
[0005] The utility model provides a concrete cut-off wall joint pipe, including: a pipe body, a female joint and a male joint. The female joint includes a socket section fixedly connected to one end of the pipe body. The socket section is annular, and a plurality of positioning holes are arranged along the circumferential direction of the socket section. The plurality of positioning holes are arranged at equal intervals. The outer diameter of the socket section is the same as that of the pipe body. The male joint includes an embedded section fixedly connected to the other end of the pipe body. The embedded section is annular, and a plurality of connection holes are arranged along the circumferential direction of the embedded section. The plurality of connection holes correspond to the plurality of positioning holes one by one. The socket section of one of the two stacked concrete cut-off wall joint pipes can be sleeved on the embedded section of the other. The embedded section and the socket section are in clearance fit, and the corresponding positioning holes and connection holes can be fixed by threaded fasteners to realize the fixation between the socket section and the embedded section.
[0006] Optionally, the female joint further includes an inner retaining edge integrally formed with the socket section. The inner retaining edge is annular, and is fixedly welded to the pipe body. The inner diameter of the inner retaining edge is the same as the inner diameter of the embedded section, and the outer diameter of the inner retaining edge is the same as the outer diameter of the socket section.
[0007] Optionally, the male joint further includes an outer retaining edge integrally formed with the embedded section. The outer retaining edge is annular, and the outer retaining edge is fixedly welded to the pipe body. The outer diameter of the outer retaining edge is the same as the outer diameter of the pipe body. When the embedded section is inserted into the socket section, the end of the embedded section abuts against the end of the inner retaining edge.
[0008] Optionally, the wall thickness of the embedded section is greater than or equal to 30 mm.
[0009] Optionally, the sum of the heights of the socket section and the inner retaining edge is greater than or equal to 320 mm, wherein the height of the socket section is greater than or equal to 233 mm.
[0010] Optionally, the number of positioning holes is greater than or equal to 12.
[0011] Optionally, the diameter of the positioning hole is 107 mm.
[0012] Optionally, a lifting hole is provided on the embedded section.
[0013] The technical solution provided by the embodiment of the present utility model has the following advantages compared with the prior art:
[0014] The concrete cutoff wall joint pipe provided by the embodiment of the present utility model is fixedly connected with a socket section at one end of the pipe body and an embedded section at the other end of the pipe body. When connecting multiple joint pipes, by sleeving the socket section of the upper joint pipe in the stacked two joint pipes into the embedded section of the lower joint pipe, and then sequentially passing the threaded fasteners through the positioning holes and the corresponding connection holes to fix the upper and lower two joint pipes. Compared with the current connection method, the concrete cutoff wall joint pipe of the present utility model forms a rigid connection, and there is no degree of freedom between the pipes. Even when the hole shape of the joint hole is irregular, or there are situations such as boulders, fallen blocks, and unstable hole walls around the hole shape, the difficulty of pipe extraction caused by the hole shape can be minimized. Description of the Drawings
[0015] Figure 1 It is the front view of a concrete cutoff wall joint pipe provided by the embodiment of the present utility model;
[0016] Figure 2 It is the side view of a concrete cutoff wall joint pipe provided by the embodiment of the present utility model;
[0017] Figure 3 It is the cross-sectional view of the female joint and male joint of a concrete cutoff wall joint pipe provided by the embodiment of the present utility model;
[0018] Figure 4 It is the schematic diagram of the connection structure of two concrete cutoff wall joint pipes provided by the embodiment of the present utility model.
[0019] Description of the Reference Numerals:
[0020] 1 - Pipe body, 2 - Female joint, 20 - Socket section, 21 - Positioning hole, 22 - Inner retaining edge, 3 - Male joint, 30 - Embedded section, 31 - Connection hole, 32 - Outer retaining edge, 33 - Lifting hole. Detailed implementation mode
[0021] The following combines with the attached drawings to describe in detail a specific implementation mode of the present utility model. However, it should be understood that the protection scope of the present utility model is not limited by the specific implementation mode.
[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the technical solution of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present utility model.
[0023] The cut-off wall is generally formed by connecting each unit wall segment. The construction methods of some wall segments are only available in the self-setting mortar cut-off wall. The joint between wall segments is the weak link of the cut-off wall; if the connection is not good, there may be concentrated leakage, reducing the anti-seepage effect. The basic requirements for the connection of wall segments are close contact, a longer seepage path, and better integrity. According to different construction methods, the connection of wall segments can be divided into construction methods such as drilling method, joint pipe (plate) method, double reverse arc method, cutting (milling) method, etc. Different connection forms have different anti-seepage effects. The connection form of wall segments is often related to the construction method and equipment of hole making.
[0024] The joint form of the wall segment formed by the joint pipe method is the same as that of the drilling method, both are semi-circular arcs, only the construction methods are different. The construction procedure of the joint pipe method is: before pouring the first-phase groove hole, set joint pipes at both ends of the groove hole. After pouring for a certain time, gradually pull out the joint pipes to form a joint hole, and then use this joint hole as the end hole of the adjacent second-phase groove hole. This method avoids the waste of working hours and materials caused by repeated drilling of joint holes, and has the advantages of smooth contact surface, tight joint (the joint width can be controlled within 1 mm), easy control of hole inclination, and guaranteed lapping thickness, etc. However, special equipment is required and the construction process is relatively complex, especially in the case of a relatively deep cut-off wall.
[0025] The joint pipe method is generally used for cases where the wall depth is less than 60 m and the wall thickness is less than 1.2 m. The thin concrete cut-off walls for river embankment reinforcement (with a general wall thickness of 30 - 40 cm) all adopt the joint pipe method, which not only ensures the construction quality but also speeds up the construction progress, fully demonstrating the superiority of the joint pipe method. In August 2001, a pipe-pulling hole-forming test with a hole diameter of 1.2 m and a hole depth of 50 m was carried out at the construction site of Jiangsu Runyang Yangtze River Bridge and achieved success. In 2002, in the main dam concrete cut-off wall project of Nierji Water Control Project, the joint pipes of 225 trench holes (with a diameter of 800 mm) all adopted the BG350 / 800 type pipe-pulling machine to pull out the joint pipes for construction. The maximum pipe-pulling depth was 39.6 m, and the pipe-pulling success rate was 100%, saving 4000 m 3 When using the joint pipe method, the pouring and pipe-pulling processes must be strictly controlled; there are also certain requirements for the bearing capacity of the foundation and guide wall as well as the hole shape of the pipe-laying part, especially when the wall depth is relatively large. For different hole depths and diameters, the pipe-pulling hole-forming machines and methods are not exactly the same and depend on the specific situation. When the hole depth and diameter are relatively small, generally, the pipe is pulled out after the trench hole is poured, with the crane as the main pipe-pulling equipment and the hydraulic pipe-pulling machine as a backup. When the hole depth and diameter are relatively large, the hydraulic pipe-pulling machine must be used for pipe-pulling, and it is necessary to pull the pipe while pouring. The strength of each part of the joint pipe must be able to withstand the maximum possible pipe-pulling force, and the connection method of the joint pipe should facilitate the connection and disassembly operations.
[0026] At present, the joint pipes used in the joint pipe method are joint pipes in the form of male and female joints. The male joint fixes two ear plates inside one end of the joint pipe, and the female joint fixes the insertion plate at the other end of the joint pipe. The insertion plate extends out of the end of the joint pipe. By inserting the insertion plate in adjacent two joint pipes between the ear plates and then using a single pin to connect the ear plate and the insertion plate, when there is a gap between the pipe sections, the two joint pipes will have a certain space for free rotation around the pin. In this way, when the hole shape of the joint hole is irregular, especially when there are probe stones, fallen blocks, unstable hole walls, etc. around the hole shape, it will greatly increase the difficulty of pulling out the joint pipe.
[0027] Therefore, the embodiment of the present utility model provides a joint pipe for a concrete cut-off wall, which can reduce the difficulty of pulling out the joint pipe.
[0028] At least one embodiment of the present utility model provides a concrete cutoff wall joint pipe, comprising: a pipe body, a female joint and a male joint. The female joint includes a socket section fixedly connected to one end of the pipe body. The socket section is annular, and a plurality of positioning holes are provided along its circumferential direction. The plurality of positioning holes are arranged at equal intervals. The outer diameter of the socket section is the same as that of the pipe body. The male joint includes an embedded section fixedly connected to the other end of the pipe body. The embedded section is annular, and a plurality of connection holes are provided along its circumferential direction. The plurality of connection holes correspond to the plurality of positioning holes one by one. The socket section of one of the two stacked concrete cutoff wall joint pipes can be sleeved on the embedded section of the other. The embedded section and the socket section are in clearance fit, and the corresponding positioning holes and connection holes can be fixed by threaded fasteners to realize the fixation of the socket section and the embedded section.
[0029] In the concrete cutoff wall joint pipe provided by the above embodiment of the present utility model, by fixedly connecting the socket section at one end of the pipe body and the embedded section at the other end of the pipe body, when connecting multiple joint pipes, the socket section of the upper joint pipe among the two stacked joint pipes is sleeved in the embedded section of the lower joint pipe, and then the threaded fasteners are sequentially passed through the positioning holes and the corresponding connection holes to fix the upper and lower two joint pipes.
[0030] The present utility model will be described below through several specific embodiments. In order to keep the description below of the embodiments of the present utility model clear and concise, the detailed description of known functions and known components may be omitted. When any component of the embodiment of the present utility model appears in more than one drawing, the component may be denoted by the same reference numeral in each drawing.
[0031] Reference Figure 1 and Figure 2 , Figure 1 is the front view of a concrete cutoff wall joint pipe provided by an embodiment of the present utility model, Figure 2 is the side view of a concrete cutoff wall joint pipe provided by an embodiment of the present utility model, as Figure 1 and Figure 2As shown in the figure, an embodiment of the utility model provides a concrete cut-off wall joint pipe, which comprises: a pipe body 1, a female joint 2 and a male joint 3. The materials of the female joint 2 and the male joint 3 can be steel. The female joint 2 includes a socket section 20 fixedly connected to one end of the pipe body 1. The socket section 20 is annular. A plurality of positioning holes 21 are arranged along the circumferential direction of the socket section 20. The plurality of positioning holes 21 are arranged at equal intervals. The outer diameter of the socket section 20 is the same as that of the pipe body 1. Keeping the same outer diameter of the socket section 20 and the pipe body 1 can minimize the resistance during the extraction of the joint pipe. The male joint 3 includes an embedded section 30 fixedly connected to the other end of the pipe body 1. The embedded section 30 is annular. A plurality of connection holes 31 are arranged along the circumferential direction of the embedded section 30. The plurality of connection holes 31 correspond to the plurality of positioning holes 21 one by one. The socket section 20 of one of the two stacked concrete cut-off wall joint pipes can be sleeved on the embedded section 30 of the other. The embedded section 30 and the socket section 20 are in clearance fit. When the embedded section 30 of the male joint 3 and the socket section 20 of the female joint 2 are sleeved, a 2mm gap is reserved in the inner diameter, so as to ensure the smoothness of the assembly. The corresponding positioning holes 21 and connection holes 31 can be fixed by threaded fasteners to realize the fixation of the socket section 20 and the embedded section 30. It should be noted that the positioning holes 21 and the connection holes 31 can be threaded holes or smooth holes. In this embodiment, the positioning holes 21 and the connection holes 31 are processed into smooth holes. Since the bolts used are not cylindrical but conical, the center of the cone is a thinner threaded stud (for fixing), but after the male and female joints are connected, the stress-bearing surface is the conical surface. Such bolts can bear a large extraction force, and there is no need to worry about the thread stress concentration and deformation failure caused by eccentricity. Then, it can be fixedly connected by bolts.
[0032] The concrete cut-off wall joint pipe provided by the embodiment of the utility model fixedly connects a socket section at one end of the pipe body and an embedded section at the other end of the pipe body. When connecting multiple joint pipes, by sleeving the socket section of the upper joint pipe among the two stacked joint pipes on the embedded section of the lower joint pipe, and then sequentially passing the threaded fasteners through the positioning holes and the corresponding connection holes to fix the upper and lower two joint pipes. Compared with the current connection method, the concrete cut-off wall joint pipe of the utility model forms a rigid connection, and there is no degree of freedom between pipes, that is, a smooth and non-protruding outer wall is formed as a whole. Even when the hole shape of the joint hole is irregular, or there are situations such as boulders, fallen blocks, and unstable hole walls around the hole shape, the difficulty of pipe extraction caused by the hole shape can be minimized.
[0033] Reference Figure 3 , Figure 3 is a cross-sectional view of the female joint and the male joint of a concrete cut-off wall joint pipe provided by an embodiment of the utility model. As Figure 3As shown, the female connector 2 also includes an inner retaining edge 22 integrally formed with the sleeve section 20. The inner retaining edge 22 is annular and is welded and fixed to the pipe body 1. Since the pipe is made of Q355, welding is generally used for fixed connections between steel materials. The pipe and the design structure adopt welding processability, the welding strength is sufficient, and the cost is relatively economical. The smoothness of the outer wall can be ensured by setting the process parameters during welding, which is relatively easy to achieve. The inner diameter of the inner retaining edge 22 is consistent with the inner diameter of the inner embedded section 30, and the outer diameter of the inner retaining edge 22 is consistent with the outer diameter of the sleeve section 20. It should be noted that during processing, a The pipe body is cut into the required length first, and then a shallow groove is turned on the inner wall of one end thereof, the shallow groove is the sleeve section 20, and the remaining part is the inner retaining edge 22, and then the inner retaining edge 22 is welded to the pipe body 1. In this way, when the sleeve section 20 of the female joint 2 at the upper end is sleeved downward on the inner embedded section 30 of the male joint 3 of the joint pipe at the lower end, the inner embedded section 30 can be limited by the inner retaining edge 22 to prevent the inner embedded section 30 from entering the pipe body 1, so that the sleeve section 20 of the joint pipe at the upper end is stretched open, and the outer wall of the joint pipe is prevented from being uneven after the joint pipe is connected as a whole, thereby further reducing the difficulty of pulling out.
[0034] Reference again Figure 3 The male connector 3 also includes an outer retaining edge 32 integrally formed with the inner embedded section 30, the outer retaining edge 32 is annular, and the outer retaining edge 32 is welded and fixed to the pipe body 1. The outer diameter of the outer retaining edge 32 is consistent with the outer diameter of the pipe body 1. When the inner embedded section 30 is inserted into the sleeve section 20, the end of the inner embedded section 30 abuts against the end of the inner retaining edge 22. It should be noted that during processing, a section of the pipe body can be taken, first cut to the required length, and then a groove is machined out of the outer wall at one end thereof. This groove is the inner embedded section 30, and the remaining part is the outer retaining edge 32. The outer retaining edge 32 is then welded to the pipe body 1. In this way, when the sleeve section 20 of the female connector 2 at the upper end is downwardly sleeved on the inner embedded section 30 of the male connector 3 of the joint pipe at the lower end, the sleeve section 20 can be limited by the outer retaining edge 32 to prevent the sleeve section 20 from being sleeved on part of the pipe body 1, and to prevent the outer wall of the joint pipe from being uneven after the whole is connected, thereby further reducing the difficulty of pulling out.
[0035] Specifically, the wall thickness of the inner embedded section 30 is greater than or equal to 30 mm. The setting of the inner diameter of the sleeve section 20 and the inner embedded section 30 first considers that the joint sleeve part meets the strength requirement during the pulling process. Therefore, the wall thickness of the inner embedded section 30 generally adopts the sleeve joint wall thickness of 30 mm. Too thick is not economical. The gap between the inner embedded section 30 and the sleeve section 20 is 2 mm, and the wall thickness of the sleeve section 20 is 28 mm. In this way, the thickness of the outer retaining edge 32 and the inner retaining edge 22 is 60 mm, that is, the male joint 3 and the female joint 2 in this embodiment can be obtained by processing a pipe with a wall thickness of 60 mm.
[0036] Specifically, the overall height of the female joint 2 is greater than or equal to 320 mm. Among them, the height of the socket section 20 is greater than or equal to 233 mm. In this embodiment, the height of the socket section 20 is 233 mm, the height of the inner retaining edge 22 is 87 mm, correspondingly, the height of the embedded section 30 is 232 mm, and the height of the outer retaining edge 32 is 87 mm. A socket height of 233 or more can meet the arrangement of the connection holes 31. The inner retaining edge 22 is not less than 87 mm to ensure the connection strength. Under the condition that the strength is satisfied, these height values should be as small as possible because the materials of these parts are thicker. A large height will make the pipe fittings heavy and the cost high.
[0037] Reference Figure 4 , Figure 4 is a schematic diagram of the connection structure of two concrete cut-off wall joint pipes provided by the embodiment of the present utility model. As Figure 4 shown, the number of positioning holes 21 is greater than or equal to 12. In this embodiment, the number of positioning holes 21 is 12. During the extraction process of the joint pipe, there should be a certain connection strength between each pipe section. The current design maximum extraction force of this kind of joint pipe is 600 tons. After calculation, 12 connection holes are required to meet the requirements.
[0038] Correspondingly, the aperture of the positioning hole 21 is 107 mm. According to relevant engineering experience, this aperture can meet the connection strength.
[0039] Reference Figure 4 , a lifting hole 33 is provided on the embedded section 30. The aperture of the lifting hole 33 is smaller than that of the positioning hole 21, and multiple lifting holes 33 are provided. In this embodiment, 4 lifting holes 33 are provided on the male joint, and the holes are evenly distributed at 90 degrees. According to the weight to be lifted in the project, 4 lifting holes can meet the requirements of the lifting working conditions.
[0040] Usage method:
[0041] A. Use a crane to pass a sling through the lifting hole or a steel wire rope through the lifting hole to lift the joint pipe. Before lifting, check the firmness of the steel wire rope, sling, lifting tools, etc. used for lifting. In case of any abnormality, stop working and replace them. First, lift the bottom joint pipe, align it with the center of the end hole and slowly lower it. The operation should be stable and slow. According to the command signal, the bottom pipe is lowered and clamped on the pipe extraction rack. Remove the sling and lift the second joint pipe. The female joint of the second joint pipe should be smoothly sleeved on the male joint of the bottom pipe. After the sleeving is completed, connect the 12 groups of bolts between the two joints according to the principle of uniform and symmetrical installation. During the lifting process, the joints cannot collide with each other to avoid joint deformation and difficult connection.
[0042] B. Lift the joint pipe assembly and lower the joint pipe assembly until the uppermost male joint is clamped on the pipe extractor.
[0043] C. Repeat the above procedure until all the joint pipes are lowered.
[0044] The above are only several specific embodiments of the present utility model. However, the embodiments of the present utility model are not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.
Claims
1. A concrete cut-off wall joint pipe, characterized in that, Comprising: Pipe body (1); Female joint (2), including a socket section (20) fixedly connected to one end of the pipe body (1), the socket section (20) being annular, the socket section (20) being provided with a plurality of positioning holes (21) along its circumferential direction, the plurality of positioning holes (21) being arranged at equal intervals, and the outer diameter of the socket section (20) being the same as that of the pipe body (1); Male joint (3), including an embedded section (30) fixedly connected to the other end of the pipe body (1), the embedded section (30) being annular, the embedded section (30) being provided with a plurality of connection holes (31) along its circumferential direction, the plurality of connection holes (31) corresponding one-to-one to the plurality of positioning holes (21), the socket section (20) of one of the two concrete cutoff wall joint pipes stacked up and down being capable of being socketed on the embedded section (30) of the other, the embedded section (30) and the socket section (20) being in clearance fit, and the corresponding positioning holes (21) and connection holes (31) being capable of fixing the socket section (20) and the embedded section (30) through threaded fasteners.
2. The concrete cutoff wall connector pipe according to claim 1, wherein The female joint (2) further includes an inner retaining edge (22) integrally formed with the socket section (20), the inner retaining edge (22) being annular, the inner retaining edge (22) being fixedly welded to the pipe body (1), the inner diameter of the inner retaining edge (22) being the same as the inner diameter of the embedded section (30), and the outer diameter of the inner retaining edge (22) being the same as the outer diameter of the socket section (20).
3. The concrete cutoff wall connector pipe according to claim 2, wherein, The male joint (3) further includes an outer retaining edge (32) integrally formed with the embedded section (30), the outer retaining edge (32) being annular, the outer retaining edge (32) being fixedly welded to the pipe body (1), the outer diameter of the outer retaining edge (32) being the same as the outer diameter of the pipe body (1), and when the embedded section (30) is inserted into the socket section (20), the end of the embedded section (30) abuts against the end of the inner retaining edge (22).
4. The concrete cut-off wall connector pipe according to claim 3, characterized in that, The wall thickness of the embedded section (30) is greater than or equal to 30 mm.
5. The concrete cut-off wall connector pipe according to claim 4, characterized in that, The sum of the heights of the socket section (20) and the inner retaining edge (22) is greater than or equal to 320 mm, wherein the height of the socket section (20) is greater than or equal to 233 mm.
6. The concrete cutoff wall connector pipe according to claim 1, characterized in that, The number of the positioning holes (21) is greater than or equal to 12.
7. The concrete cut-off wall connector pipe according to claim 6, characterized in that, The aperture of the positioning hole (21) is 107 mm.
8. The concrete cutoff wall connector pipe according to claim 1, wherein, The embedded section (30) is provided with a lifting hole (33).