Water pipeline

Abstract

The present invention relates to the technical field of water delivery concrete pipelines, and in particular to a water delivery pipeline. The water delivery pipeline comprises a pipe body and a filling part; the material of the pipe body comprises: the filling part is prefabricated inside the pipe body, and the material of the filling part is a high molecular polymer. The water delivery pipeline adopts a UHPC molded pipe body, which has significantly superior crack resistance, frost resistance, impermeability and durability, and extends the durability from 50 years to more than 100 years. Under the condition of meeting the mechanical properties, the filling part effectively saves the cost of UHPC materials and reduces the dead weight, thereby bringing great convenience to both pipeline transportation and installation.

Description

Technical Field

[0001] The invention relates to the technical field of water delivery concrete pipelines, and in particular to a water delivery pipeline. Background Art

[0002] Concrete is the most widely used material in the construction and cement products industry, and is also the main material for making concrete pipes. However, concrete has a large bulk density, generally 2400kg / cubic meter, which makes the concrete pipe very heavy, making transportation and installation difficult. In addition, ordinary concrete is a brittle material with very low tensile strength, generally 5% of the compressive strength, so cracks are a common problem, and ordinary concrete also has low impermeability and frost resistance.

[0003] These properties determine that the durability and safety of ordinary concrete pipes and their products are affected, making the design base life of my country's concrete water supply and drainage pipes generally only 50 years. Summary of the invention

[0004] The purpose of the present invention is to provide a water delivery pipeline to solve the technical problem that the durability and safety of ordinary concrete pipelines and their products need to be improved to a certain extent.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] Based on the above purpose, the water delivery pipeline provided by the present invention includes a pipe body and a filling part;

[0007] The material of the pipe body includes UHPC (Ultra-High Performance Concrete);

[0008] The filling part is prefabricated inside the tube body, and the material of the filling part is a high molecular polymer.

[0009] In any of the above technical solutions, optionally, the high molecular polymer is polystyrene.

[0010] In any of the above technical solutions, optionally, the filling portion is in a rod shape, and the axial direction of the filling portion is consistent with the axial direction of the tube body.

[0011] In any of the above technical solutions, optionally, there are multiple filling parts, and the multiple filling parts are arranged at intervals along the circumference of the tube body.

[0012] In any of the above technical solutions, optionally, a plurality of the filling parts are evenly arranged.

[0013] In any of the above technical solutions, optionally, the radial cross-section of the filling portion is in a regular shape.

[0014] In any of the above technical solutions, optionally, the sum of the radial cross-sectional areas of the plurality of filling parts is not less than 30% of the radial cross-sectional area of ​​the water delivery pipeline.

[0015] In any of the above technical solutions, optionally, the water pipeline is sectioned along the radial direction of the water pipeline, and an angle formed by the cross-sectional centroids of two adjacent filling portions with the axis of the pipe body as the vertex is defined as a first predetermined sectioning angle;

[0016] The pipe body is cut at the first predetermined cutting angle to obtain a first block, and the common concrete pipe is cut at the first predetermined cutting angle to obtain a second block, wherein the stiffness of the first block is greater than the stiffness of the second block;

[0017] Alternatively, the water pipeline is sectioned along the radial direction of the water pipeline, and the midpoint of the connecting arc of the cross-sectional centroids of two adjacent filling portions is defined as the predetermined base point, and the angle formed by the two adjacent predetermined base points with the axis of the pipe body as the vertex is defined as the second predetermined sectioning angle;

[0018] The pipe body is cut at the second predetermined cutting angle to obtain a third block, and the ordinary concrete pipe is cut at the second predetermined cutting angle to obtain a fourth block. The stiffness of the third block is greater than the stiffness of the fourth block.

[0019] In any of the above technical solutions, optionally, a socket piece and a plug piece are provided at both axial ends of the tube body;

[0020] Along the axial direction of the tube body, two ends of the filling portion form a predetermined interval with the socket member and the plug member respectively.

[0021] In any of the above technical solutions, optionally, the water delivery pipeline further comprises a multi-layer structural steel bar layer assembly pre-buried inside the pipe body;

[0022] The multiple layers of structural steel bar layer components are sequentially spaced and sleeved, and the filling part is arranged between every two adjacent layers of the structural steel bar layer components.

[0023] By adopting the above technical solution, the beneficial effects of the present invention are:

[0024] The water delivery pipeline provided by the present invention comprises a pipe body and a filling part. The material of the pipe body comprises UHPC, and the tensile strength of the UHPC material is greater than 5MPa, the compressive strength is greater than 100MPa, and the chloride ion diffusion coefficient is greater than 2.0×10-14m 2 / s, elastic modulus greater than 40GPa, while the commonly used ordinary concrete is generally concrete with strength grade C50. Therefore, compared with ordinary concrete, UHPC has twice the tensile strength, more than twice the compressive strength, more than 10 times the resistance to chloride ion diffusion, and more than 1.16 times the elastic modulus. In other words, UHPC has obvious advantages over ordinary concrete, making the pipe body formed by UHPC have significantly superior crack resistance, frost resistance, impermeability and durability than the water pipe formed by ordinary concrete. Even in the harshest natural environment, the structural life is expected to reach at least 100 years.

[0025] The filling part is prefabricated inside the pipe body. The material of the filling part is a high molecular polymer. The high molecular polymer is a lightweight filling material and provides a structural basis for the lightweight of the water pipeline.

[0026] Due to the superior performance of UHPC materials, there is still a large stiffness margin under the conditions of meeting the mechanical properties of the pipeline and resisting load deformation. This allows the water pipeline to reduce the amount of UHPC material while meeting the mechanical properties. On the basis of retaining significantly superior crack resistance, frost resistance, impermeability and durability, it can effectively save UHPC material costs and reduce its own weight through the filling part, thereby bringing great convenience to pipeline transportation and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of the structure of a water delivery pipeline provided in Embodiment 1 of the present invention;

[0029] Figure 2 for Figure 1 Section view at section AA;

[0030] Figure 3 for Figure 2 A schematic diagram of the structure of the first cut block in FIG.

[0031] Figure 4 for Figure 2 Schematic diagram of the structure of the second block in .

[0032] Icons: 2-annular structural reinforcement layer; 3-tube body; 4-filling part; 5-longitudinal structural reinforcement layer; 6-socket; 7-plug piece; 8-first cut block; 9-third cut block. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Example

[0037] See also Figures 1 to 4 As shown, the water delivery pipeline provided in this embodiment includes a pipe body 3, a filling portion 4, a multi-layer structural steel bar layer assembly, a socket member 6 and a plug member 7.

[0038] Hereinafter, the above components of the water delivery pipeline will be described in detail.

[0039] In an optional solution of the present embodiment, the material of the pipe body 3 includes UHPC, which is ultra-high performance concrete. Without changing the pipe size specifications, the pipe body 3 can still have a mechanical performance margin while meeting basic mechanical performance requirements.

[0040] In this embodiment, a socket member 6 and a spigot member 7 are provided at both axial ends of the pipe body 3 , so that a plurality of water pipes can be connected in sequence through the socket member 6 and the spigot member 7 .

[0041] Along the axial direction of the pipe body 3, the two ends of the filling portion 4 form a predetermined interval with the socket piece 6 and the plug piece 7 respectively, so that the predetermined interval is completely filled with UHPC without the appearance of the filling portion 4, ensuring that the predetermined interval has optimal mechanical properties, and further ensuring that the connection between the socket piece 6 and the plug piece 7 and the pipe 3 respectively has a strong anti-deformation ability, avoiding the socket piece 6 or the plug piece 7 from being skewed, falling off or deformed.

[0042] Specifically, the length of the predetermined interval is not less than 60 mm.

[0043] In this embodiment, the longitudinal structural steel bar layer 5 and the annular structural steel bar layer 2 are fixedly connected to form a structural steel bar layer assembly and are pre-buried in the pipe body 3, wherein the longitudinal structural steel bar layer 5 plays a role in supporting the pipe body 3, and the longitudinal structural steel bar layer 5 includes threaded steel bars extending along the axial direction of the pipe body 3, and the threaded steel bars can fit closely with the cast UHPC material to reduce the risk of axial movement, for example, the longitudinal structural steel bar layer 5 can be a steel cage with threaded steel bars. The annular structural steel bar layer 2 plays a role in assisting in resisting deformation, and the annular structural steel bar layer 2 can wrap the steel bars to form.

[0044] Specifically, the annular structural steel bar layer 2 of each structural steel bar layer assembly is welded to the outer side or inner side of the longitudinal structural steel bar layer 5 , the number of layers of the structural steel bar layer assembly is two, and a gap is formed between the two layers of the structural steel bar layer assembly along the radial direction of the tube body 3 .

[0045] In an optional solution of the present embodiment, the filling part 4 is prefabricated inside the tube body 3 , and the material of the filling part 4 is a high molecular polymer, which is light and can resist deformation caused by the scouring force during concrete pouring.

[0046] In this embodiment, the filling portion 4 is disposed between every two adjacent layers of structural steel bar layer assemblies. Specifically, when the number of layers of the structural steel bar layer assemblies is two, the filling portion 4 is prefabricated in the interval between the two layers of the structural steel bar layer assemblies.

[0047] The filling part 4 is arranged in this way, so that after the longitudinal structural steel bar layer 5 and the circumferential structural steel bar layer 2 are welded and fixed to form a structural steel bar layer assembly, the filling part 4 is fixed in the interlayer between the two layers of structural steel bar layer assemblies according to the pre-designed installation position, so that the three are formed into a whole. Then the formed whole structure is placed in a steel mold, and then the UHPC mixture is poured into the steel mold, and the UHPC mixture is vibrated by a vertical vibration process, and then steam-cured at a curing temperature of 60°C for 12 hours, and then the mold is removed. After the mold is removed, water is sprinkled for curing for 7 days, and the product is inspected after being placed for 28 days.

[0048] In this embodiment, the filling portion 4 is in a rod shape, and the axis of the filling portion 4 is consistent with the axis direction of the tube body 3, so that on the one hand, the influence of the filling portion 4 on the circumferential stiffness of the tube body 3 can be minimized, and on the other hand, the downward settlement of the UHPC mixture is not affected during the concrete pouring process, thereby improving the molding quality of the UHPC mixture.

[0049] The radial cross section of the filling portion 4 is of a regular shape, and the so-called "regular shape" refers to a regular shape or a simple combination of regular shapes that can be calculated by a common cross-sectional inertia moment calculation formula, such as a circle, an ellipse or a regular polygon.

[0050] In this embodiment, there are multiple filling parts 4, and the multiple filling parts 4 are evenly spaced along the circumference of the pipe body 3, so as to improve the density uniformity of the water pipe body 3 on the one hand, and improve the uniformity of the circumferential stiffness of the water pipe body 3 on the other hand.

[0051] In an optional solution of this embodiment, the sum of the radial cross-sectional areas of the plurality of filling portions 4 is not less than 30% of the radial cross-sectional area of ​​the water pipe, thereby saving at least 30% of UHPC material compared to filling the entire pipe body 3 with UHPC.

[0052] In this embodiment, in order to ensure that the filling amount of the filling part 4 is carried out under the premise of ensuring the basic mechanical properties of the water pipe body 3, it is necessary to design the filling amount of the filling part 4, that is, to design the number and radius of the filling part 4. Two feasible filling amount design methods are given below.

[0053] As an example, the water pipe is cut along the radial direction of the water pipe, and the angle formed by the cross-sectional centroids of two adjacent filling parts 4 with the axis of the pipe body 3 as the vertex is defined as the first predetermined cutting angle. The pipe body 3 is cut at the first predetermined cutting angle to obtain a first block 8, and the ordinary concrete pipe is cut at the first predetermined cutting angle to obtain a second block. The stiffness of the first block 8 is greater than the stiffness of the second block.

[0054] Specifically, if Figure 3 As shown, the section moment of inertia I1 of the first cut block 8 is calculated, and then the stiffness of the first cut block 8 is determined according to the product of the elastic modulus E0 of the UHPC and the section moment of inertia I1 of the first cut block 8. The section moment of inertia I1 of the first cut block 8 is obtained by cutting the water pipe at a first predetermined cutting angle. 10 Subtract the section inertia moment I of the filling portion 4 11 get.

[0055] It is worth explaining that the inner diameter and outer diameter of the pipe body 3 corresponding to the first cut block 8 are the same as the inner diameter and outer diameter of the ordinary concrete pipe corresponding to the second cut block.

[0056] The second block is approximated into a rectangle to obtain the section inertia moment I2 of the second block, and then the stiffness of the second block is calculated based on the elastic modulus E2 of ordinary concrete and the section inertia moment I2 of the second block. It can be understood that the section inertia moment I2 of the block obtained by cutting the water pipe at the first predetermined cutting angle is 10 An approximate rectangle can also be used for calculation.

[0057] Alternatively, as another example, the water pipe is sectioned along the radial direction of the water pipe, the midpoint of the connecting arc of the cross-sectional centroids of two adjacent filling portions 4 is defined as the predetermined base point, and along the circumference of the water pipe, the angle formed by two adjacent predetermined base points with the axis of the pipe body 3 as the vertex is the second predetermined sectioning angle, the pipe body 3 is sectioned at the second predetermined sectioning angle to obtain a third block 9, and the ordinary concrete pipe is sectioned at the second predetermined sectioning angle to obtain a fourth block, and the stiffness of the third block 9 is greater than the stiffness of the fourth block.

[0058] Specifically, if Figure 4 As shown, the section moment of inertia I3 of the third block 9 is calculated, and then the stiffness of the third block 9 is calculated according to the product of the elastic modulus E0 of UHPC and the section moment of inertia I3 of the third block 9. The section moment of inertia I3 of the third block 9 is obtained by cutting the water pipe at the second predetermined cutting angle. 30 Subtract the section inertia moment I of the filling portion 4 31 get.

[0059] It is worth explaining that the inner diameter and outer diameter of the pipe body 3 corresponding to the third cut block 9 are the same as the inner diameter and outer diameter of the ordinary concrete pipe corresponding to the fourth cut block.

[0060] The fourth block is approximated as a rectangle to obtain the section inertia moment I4 of the fourth block, and then the stiffness of the fourth block is calculated according to the product of the elastic modulus E1 of ordinary concrete and the section inertia moment I4 of the fourth block. It can be understood that the section inertia moment I4 of the block obtained by cutting the water pipe at the second predetermined cutting angle is 30 An approximate rectangle can also be used for calculation.

[0061] It is worth emphasizing that when determining the cross-sectional shape and size of the filling portion 4 , the thickness requirements of the annular structural reinforcement layer 2 and the longitudinal structural reinforcement layer 5 should also be met.

[0062] The water pipeline is Figure 2 and 3As shown, the shape of the filling part 4 is circular, the radius of the filling part 4 is 80 mm, the diameter of the tube body 3 is 2800 mm, the thickness of the tube body 3 is 260 mm, the distance between the centers of adjacent filling parts 4 is 220 mm, the number is 43, and taking ordinary concrete with a strength grade of C50 as an example, the elastic modulus of ordinary concrete is 34 GPa, the elastic modulus of UHPC is 40 GPa, and the stiffness of the first block 8 is 11.6*10 13 N / m, the stiffness of the second block is 10.95×10 13 N / m, the stiffness of the first block 8 is greater than that of the second block, and the filling rate of the filling part 4 is 34.6%, that is, the amount of UHPC material is reduced by 34.6%.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments instead of other features, the combination of features of different embodiments means that they are within the scope of the present invention and form different embodiments. For example, any one of the embodiments claimed for protection can be used in any combination. The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form of implication that the information constitutes prior art known to those skilled in the art.

Claims

1. A water pipeline, characterized in that: It includes a tube body and a filling part; The material of the pipe body includes UHPC; The filling part is prefabricated inside the tube body, and the material of the filling part is a high molecular polymer; The filling part is in a rod shape, and the axial direction of the filling part is consistent with the axial direction of the tube body; there are multiple filling parts, and the multiple filling parts are arranged at intervals along the circumference of the tube body; the sum of the radial cross-sectional areas of the multiple filling parts is not less than 30% of the radial cross-sectional area of ​​the water delivery pipeline; The water delivery pipe is cut along the radial direction of the water delivery pipe, and an angle formed by the cross-sectional centroids of two adjacent filling portions with the axis of the pipe body as the vertex is defined as a first predetermined cutting angle; The pipe body is cut at the first predetermined cutting angle to obtain a first block, and the common concrete pipe is cut at the first predetermined cutting angle to obtain a second block, wherein the stiffness of the first block is greater than the stiffness of the second block; Alternatively, the water pipeline is sectioned along the radial direction of the water pipeline, and the midpoint of the connecting arc of the cross-sectional centroids of two adjacent filling portions is defined as the predetermined base point, and the angle formed by the two adjacent predetermined base points with the axis of the pipe body as the vertex is defined as the second predetermined sectioning angle; The pipe body is cut at the second predetermined cutting angle to obtain a third block, and the ordinary concrete pipe is cut at the second predetermined cutting angle to obtain a fourth block. The stiffness of the third block is greater than the stiffness of the fourth block.

2. The water pipeline according to claim 1, characterized in that: The high molecular polymer is polystyrene.

3. The water pipeline according to claim 1, characterized in that: The plurality of filling parts are evenly arranged.

4. The water pipeline according to claim 1, characterized in that: The radial cross section of the filling portion is in a regular shape.

5. The water pipeline according to claim 1, characterized in that: The two axial ends of the tube body are provided with a socket piece and a spigot piece; Along the axial direction of the tube body, two ends of the filling portion form a predetermined interval with the socket member and the plug member respectively.

6. The water pipeline according to claim 1, characterized in that: It also includes a multi-layer structural steel bar layer assembly embedded in the interior of the pipe body; The multiple layers of structural steel bar layer components are sequentially spaced and sleeved, and the filling part is arranged between every two adjacent layers of the structural steel bar layer components.

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