Anti-drag sleeve based on multi-layer shunting uniform grouting

Abstract

The utility model discloses an anti-drag sleeve based on multi-layer shunting uniform grouting. The anti-drag sleeve comprises an anti-drag sleeve body, a grouting opening, a first-stage shunting layer and a second-stage shunting layer. The first-stage shunting layer is arranged below the grouting opening; the first-stage flow dividing layer comprises a first-stage horizontal flow dividing channel communicating with the grouting opening and a first-stage vertical flow dividing channel communicating with the first-stage horizontal flow dividing channel. The second-stage shunting layer is arranged below the first-stage shunting layer; the second-stage shunting layer comprises a second-stage horizontal shunting channel communicated with the first-stage vertical shunting channel and a second-stage vertical shunting channel communicated with the second-stage horizontal shunting channel; the drag reduction sleeve main body is arranged below the second-stage shunting layer; the resistance reduction sleeve main body comprises a main body vertical channel communicated with the secondary vertical shunting channel, a main body horizontal channel communicated with the main body vertical channel, and a slurry outlet communicated with the main body horizontal channel; the main body vertical channel extends outwards in the horizontal direction and penetrates through the resistance reduction sleeve main body to form the slurry outlet.

Description

Technical Field

[0001] The utility model relates to the technical field of marine engineering, in particular to a drag reduction sleeve based on multi-layer diversion uniform grouting. Background Art

[0002] With the continuous expansion of my country's socioeconomic landscape, the demand for marine space is increasing, leading to a booming development of marine engineering construction. In marine engineering, foundation penetration often encounters resistance, resulting in reduced penetration efficiency and impacting construction efficiency. Therefore, thixotropic grouting technology plays a crucial role in drag reduction during construction. Uniform, synchronized grouting can create a well-defined thixotropic grouting envelope between the foundation and the surrounding soil, significantly reducing penetration resistance during construction.

[0003] To improve the quality and efficiency of marine engineering construction, drag-reducing sleeves or modified barrel shapes are often used to reduce the resistance of thixotropic slurries in pipelines. However, existing drag-reduction methods fail to consider how to achieve efficient, simultaneous and uniform grouting during penetration and prevent slurry blockage during the grouting process.

[0004] Therefore, for foundation projects with excessive penetration resistance, a drag-reducing sleeve based on multi-layer diversion and uniform grouting is urgently needed to achieve good contact between the foundation and the side soil and improve the foundation penetration efficiency. Utility Model Content

[0005] (1) Technical issues to be resolved

[0006] The technical problem to be solved by the utility model is to provide a drag reduction sleeve based on multi-layer diversion uniform grouting. Its grouting port, primary diversion layer and secondary diversion layer can realize the thixotropic mud injection through a single hole, and then flow into multiple main vertical channels in the drag reduction sleeve body through multi-layer diversion uniformly, and be evenly distributed along the side wall of the engineering foundation, so that the contact surface between the engineering foundation and the surrounding soil is closely fitted, thereby reducing the foundation penetration resistance and improving the foundation penetration efficiency.

[0007] (2) Technical solution

[0008] The solution adopted by the utility model to solve the above technical problems is a drag reduction sleeve based on multi-layer diversion uniform grouting, which includes a drag reduction sleeve body, a grouting port, a primary diversion layer, and a secondary diversion layer;

[0009] The primary diversion layer is arranged below the grouting port and is in communication with the grouting port; wherein the primary diversion layer includes a primary horizontal diversion channel arranged along the circumferential direction and in communication with the grouting port, and a primary vertical diversion channel arranged along the vertical direction and in communication with the primary horizontal diversion channel;

[0010] The secondary diversion layer is arranged below the primary diversion layer and is connected to the primary diversion layer; wherein the secondary diversion layer includes a secondary horizontal diversion channel arranged along an annular direction and connected to the primary vertical diversion channel, and a secondary vertical diversion channel arranged along an axial direction and connected to the secondary horizontal diversion channel;

[0011] The drag reducing sleeve body is arranged below the secondary diversion layer and is communicated with the secondary diversion layer; wherein, the drag reducing sleeve body includes a main body vertical channel arranged along the axial direction and communicated with the secondary vertical diversion channel, a main body horizontal channel arranged along the circumferential direction and communicated with the main body vertical channel, and a slurry outlet communicated with the main body horizontal channel; and, the slurry outlet is formed by the main body vertical channel extending outward along the horizontal direction and passing through the drag reducing sleeve body, so that the slurry outlet can connect the main body vertical channel and the outside world.

[0012] Specifically, after the thixotropic slurry is injected through a single hole of the grouting port, it passes through the primary diversion layer and the secondary diversion layer in sequence and evenly flows into the multiple main vertical channels in the drag reduction sleeve body, and flows out evenly from the slurry outlet on the side wall of the drag reduction sleeve body, so that the contact surface between the engineering foundation and the surrounding soil is closely fitted, reducing the foundation penetration resistance and improving the foundation penetration efficiency.

[0013] In some embodiments, the number of the first-level horizontal diversion channels is one, and they are semicircular channels; and the first-level horizontal diversion channels are symmetrically distributed with the grouting port as the center; the number of the first-level vertical diversion channels is two, and they are respectively connected to the two ends of the first-level horizontal diversion channels and communicate with them.

[0014] In some embodiments, the number of the secondary horizontal diversion channels is two, and they are 90° fan-shaped channels; and, one of the secondary horizontal diversion channels is symmetrically arranged with one of the primary vertical diversion channels as the center; the other secondary horizontal diversion channel is symmetrically arranged with another primary vertical diversion channel as the center; the number of the secondary vertical diversion channels is four, and both ends of the two secondary horizontal diversion channels are connected to a secondary vertical diversion channel and are in communication with each other.

[0015] In some embodiments, the number of the main body vertical channels is four, and the four main body vertical channels are respectively connected to the four secondary vertical diversion channels one by one; the number of the main body horizontal channels is four, and they are respectively connected to the four main body vertical channels; and the slurry outlet is provided at both ends of each of the main body horizontal channels.

[0016] In some embodiments, each of the horizontal channels of the main body is symmetrically arranged with the vertical channel of the main body communicating therewith as the center.

[0017] Specifically, the first-level horizontal diversion channel is symmetrically distributed with the grouting port as the center, and the distances traveled by the slurry entering from the grouting port to the first-level vertical diversion channels at both ends of the first-level horizontal diversion channel are the same; at the same time, one of the second-level horizontal diversion channels is symmetrically arranged with one of the first-level vertical diversion channels as the center; the other second-level horizontal diversion channel is symmetrically arranged with the other first-level vertical diversion channel as the center; the distances traveled by the second-level vertical diversion channels flowing from the bottom ends of the two first-level vertical diversion channels to the two ends of the two second-level horizontal diversion channels are the same; at the same time, the four main vertical diversion channels are symmetrically arranged with the bottom ends of the two first-level vertical diversion channels to the two ends of the two second-level horizontal diversion channels. The channels are connected to the four secondary vertical diversion channels one by one, and each of the main horizontal channels is symmetrically arranged with the main vertical channel connected thereto as the center; the distance taken by each secondary vertical diversion channel into each main vertical channel is the same, and the distance taken by each main vertical channel to the slurry outlets at both ends of each main horizontal channel is the same; after the slurry enters each diversion channel from the grouting port, the distance taken by the slurry to flow into each diversion outlet is the same. After multi-layer diversion, the slurry is evenly injected into the drag reduction sleeve body, flows to the slurry outlet over the same distance, and finally flows out from the slurry outlet, thereby achieving uniform grouting.

[0018] The above scheme is adopted to set up a multi-layer diversion form with a primary diversion layer and a secondary diversion layer, which can not only achieve uniform slurry discharge from multiple holes in a single-hole grouting, but also effectively avoid problems such as slurry blockage and diversion layer failure during the diversion process, making construction and maintenance more convenient and efficient.

[0019] In some embodiments, the bottom of the drag-reducing sleeve body is provided with a cutting foot to facilitate cutting into the soil when sinking.

[0020] In some embodiments, the primary diverter layer and the secondary diverter layer are detachably connected; the secondary diverter layer is integrally connected to the drag reduction sleeve body in a detachable manner.

[0021] Specifically, the internal structure of the first-level diverter layer and the second-level diverter layer is an annular cavity diverter layer, and the diameters of the internal channels are the same, so that the flow of mud is more uniform; and, since the first-level diverter layer and the second-level diverter layer are detachably connected, the second-level diverter layer and the drag reduction sleeve body are detachably connected; during use, when mud blocks any diverter channel, the corresponding diverter layer can be replaced in time, which is convenient for disassembly and assembly, and more convenient for maintenance; and, since both use a detachable connection method, they can be selected according to actual conditions to adapt to drag reduction sleeve bodies of different diameters.

[0022] By adopting the above scheme, the first-level diversion layer and the second-level diversion layer of different sizes can be replaced according to the actual drag reduction sleeve body used. It has a wide range of applications and strong practicality, and provides drag reduction technical support for the foundation of marine engineering.

[0023] In some embodiments, the primary diversion layer and the secondary diversion layer are both annular cavity diversion layers, and have the same inner diameter and outer diameter; and the diameters of the primary horizontal diversion channel, the primary vertical diversion channel, the secondary horizontal diversion channel and the secondary vertical diversion channel are all the same.

[0024] In some embodiments, the diameters of the main body vertical channel, the main body horizontal channel, and the slurry outlet are all the same.

[0025] Specifically, the specific length of the main vertical channel in the drag reducing sleeve body can be determined according to factors such as research conditions, slurry output, and the outer diameter of the barrel foundation.

[0026] In some embodiments, the drag-reducing sleeve body, the grouting port, the primary diversion layer, and the secondary diversion layer are manufactured using 3D printing technology, which features precise manufacturing, high manufacturing efficiency, and raw material saving, thus greatly reducing manufacturing costs.

[0027] (3) Beneficial effects

[0028] Compared with the existing technology, the utility model designs a drag reduction sleeve based on multi-layer diversion uniform grouting.

[0029] (1) The grouting port, the first-level diversion layer, and the second-level diversion layer in the utility model can realize that after the thixotropic mud is injected into a single hole, it flows evenly into multiple vertical channels of the drag-reducing sleeve through multiple diversion layers and is evenly distributed along the side wall of the engineering foundation, so that the contact surface between the engineering foundation and the surrounding soil is closely fitted, reducing the foundation penetration resistance and improving the foundation penetration efficiency;

[0030] (2) The utility model sets a multi-layer diversion form of a primary diversion layer and a secondary diversion layer, which can not only realize the uniform slurry discharge from multiple holes in a single-hole grouting, but also effectively avoid the problems of slurry blockage and diversion layer failure during the diversion process, making construction and maintenance more convenient and efficient;

[0031] (3) The diversion structure of the present invention has a wide range of applications and strong practicality. By changing the diameter of the diversion layer, it can be applied to various basic structure drag reduction sleeves, providing drag reduction technical support for marine engineering foundations;

[0032] (4) The drag reduction sleeve body, grouting port, primary diversion layer, and secondary diversion layer in the present invention are designed based on 3D printing technology, are precisely manufactured, have high manufacturing efficiency, save raw materials, and greatly reduce manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] Figure 1 This is a structural schematic diagram of a drag reduction sleeve based on multi-layer diversion uniform grouting of the utility model;

[0035] Figure 2 This is a schematic structural diagram from another angle of a drag reduction sleeve based on multi-layer diversion and uniform grouting of the present invention;

[0036] Figure 3 for Figure 2 Cross-sectional view at AA in the middle;

[0037] Figure 4 for Figure 2 Cross-sectional view at the middle BB;

[0038] Figure 5 This is a cross-sectional view of the primary diversion layer of the present utility model;

[0039] Figure 6 This is a cross-sectional view of the secondary diversion layer of the present invention;

[0040] Figure 7 for Figure 4 Cross-sectional view at CC.

[0041] The names of the components corresponding to the various figure marks in the figure are: 1. Drag reduction sleeve main body; 2. Grouting port; 3. Primary diversion layer; 3-1. Primary horizontal diversion channel; 3-2. Primary vertical diversion channel; 4. Secondary diversion layer; 4-1. Secondary horizontal diversion channel; 4-2. Secondary vertical diversion channel; 5. Main body vertical channel; 6. Main body horizontal channel; 7. Slurry outlet; 8. Blade foot. DETAILED DESCRIPTION

[0042] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0043] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0044] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0045] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0046] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0047] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples, however, one skilled in the art will appreciate that the examples can be practiced without these specific details.

[0048] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0049] like Figure 1-Figure 7 As shown, the utility model provides a drag reduction sleeve based on multi-layer diversion uniform grouting, including a drag reduction sleeve body 1, a grouting port 2, a primary diversion layer 3, and a secondary diversion layer 4; the primary diversion layer 3 is arranged below the grouting port 2 and is connected with the grouting port 2; wherein, the primary diversion layer 3 includes a primary horizontal diversion channel 3-1 arranged along the annular direction and connected with the grouting port 2, and a primary vertical diversion channel 3-2 arranged along the vertical direction and connected with the primary horizontal diversion channel 3-1; the secondary diversion layer 4 is arranged below the primary diversion layer 3 and is connected with the primary diversion layer 3; wherein, the secondary diversion layer 4 includes a secondary water diversion channel 3-2 arranged along the annular direction and connected with the primary vertical diversion channel 3-2. A horizontal diversion channel 4-1, and a secondary vertical diversion channel 4-2 arranged along the axial direction and connected with the secondary horizontal diversion channel 4-1; the drag reducing sleeve body 1 is arranged below the secondary diversion layer 4, and connected with the secondary diversion layer 4; wherein, the drag reducing sleeve body 1 includes a main body vertical channel 5 arranged along the axial direction and connected with the secondary vertical diversion channel 4-2, a main body horizontal channel 6 arranged along the annular direction and connected with the main body vertical channel 5, and a slurry outlet 7 connected with the main body horizontal channel 6; and, the slurry outlet 7 is formed by the main body vertical channel 5 extending outward along the horizontal direction and passing through the drag reducing sleeve body 1, so that the slurry outlet 7 can connect the main body vertical channel 5 and the outside world. Specifically, after the thixotropic slurry is injected through a single hole of the grouting port 2, it flows evenly into the multiple main vertical channels 5 in the drag reduction sleeve body 1 through the primary diversion layer 3 and the secondary diversion layer 4 in sequence, and flows out evenly from the slurry outlet 7 on the side wall of the drag reduction sleeve body 1, so that the contact surface between the engineering foundation and the surrounding soil is closely fitted, reducing the foundation penetration resistance and improving the foundation penetration efficiency.

[0050] In some embodiments, the number of the first-level horizontal diversion channel 3-1 is one, and it is a semicircular channel; and the first-level horizontal diversion channel 3-1 is symmetrically distributed with the grouting port 2 as the center; the number of the first-level vertical diversion channel 3-2 is two, and they are respectively connected to the two ends of the first-level horizontal diversion channel 3-1 and communicate with it. In some embodiments, the number of the second-level horizontal diversion channels 4-1 is two, and they are 90° fan-shaped channels; and one of the second-level horizontal diversion channels 4-1 is symmetrically arranged with one of the first-level vertical diversion channels 3-2 as the center; the other second-level horizontal diversion channel 4-1 is symmetrically arranged with the other first-level vertical diversion channel 3-2 as the center; the number of the second-level vertical diversion channels 4-2 is four, and both ends of the two second-level horizontal diversion channels 4-1 are connected to a second-level vertical diversion channel 4-2 and communicate with each other. In some embodiments, there are four main body vertical channels 5, and the four main body vertical channels 5 are connected and communicated with the four secondary vertical diversion channels 4-2 in a one-to-one correspondence; there are four main body horizontal channels 6, and they are respectively connected with the four main body vertical channels 5; and each of the main body horizontal channels 6 is provided with a slurry outlet 7 at both ends. In some embodiments, each of the main body horizontal channels 6 is symmetrically arranged with the main body vertical channel 5 connected thereto as the center. Specifically, the first-level horizontal diversion channel 3-1 is symmetrically distributed with the grouting port 2 as the center, and the distances traveled by the slurry entering from the grouting port 2 to the first-level vertical diversion channels 3-2 at both ends of the first-level horizontal diversion channel 3-1 are the same; at the same time, one of the second-level horizontal diversion channels 4-1 is symmetrically arranged with one of the first-level vertical diversion channels 3-2 as the center; the other second-level horizontal diversion channel 4-1 is symmetrically arranged with the other first-level vertical diversion channel 3-2 as the center; the distances traveled by the slurry flowing from the bottom ends of the two first-level vertical diversion channels 3-2 to the second-level vertical diversion channels 4-2 at both ends of the two second-level horizontal diversion channels 4-1 are the same; at the same time , the four main vertical channels 5 are respectively connected and communicated with the four secondary vertical diversion channels 4-2 in a one-to-one correspondence, and each of the main horizontal channels 6 is symmetrically arranged with the main vertical channel 5 connected thereto as the center; then the distance that each secondary vertical diversion channel 4-2 flows into each main vertical channel 5 is the same, and the distance that each main vertical channel 5 flows to the slurry outlet 7 at both ends of each main horizontal channel 6 is the same; then after the slurry enters each diversion channel from the grouting port 2, the distance it flows into each diversion outlet is the same, and after multi-layer diversion, the slurry is evenly injected into the drag reduction sleeve body 1, and the distance it flows to the slurry outlet 7 is the same, and finally it flows out from the slurry outlet 7 to achieve uniform grouting. The above scheme is adopted to set a multi-layer diversion form of a primary diversion layer 3 and a secondary diversion layer 4, which can not only achieve single-hole grouting and multi-hole uniform slurry discharge, but also effectively avoid problems such as slurry blockage and diversion layer failure during the diversion process, making construction and maintenance more convenient and efficient.In some embodiments, a cutting foot 8 is provided at the bottom of the drag-reducing sleeve body 1 to facilitate cutting into the soil when sinking.

[0051] In some embodiments, the primary diverter layer 3 and the secondary diverter layer 4 are detachably connected; the secondary diverter layer 4 is integrally and detachably connected to the drag reduction sleeve body 1. Specifically, the internal structure of the primary diverter layer 3 and the secondary diverter layer 4 is an annular cavity diverter layer, and the diameters of the internal channels are the same, so that the flow of mud is more uniform; and, since the primary diverter layer 3 and the secondary diverter layer 4 are detachably connected, the secondary diverter layer 4 and the drag reduction sleeve body 1 are detachably connected; during use, when mud blocks any diverter channel, the corresponding diverter layer can be replaced in time, which is convenient for disassembly and assembly, and maintenance is more convenient; and, since both adopt a detachable connection method, it can be selected according to actual conditions to adapt to drag reduction sleeve bodies 1 of different diameters. By adopting the above scheme, the primary diverter layer 3 and the secondary diverter layer 4 of different sizes can be replaced according to the drag reduction sleeve body 1 actually used, which has a wide range of applications and strong practicality, and provides drag reduction technical support for marine engineering foundations.

[0052] In some embodiments, the primary diverter layer 3 and the secondary diverter layer 4 are both annular cavity diverter layers with the same inner and outer diameters; and the diameters of the primary horizontal diverter channel 3-1, the primary vertical diverter channel 3-2, the secondary horizontal diverter channel 4-1, and the secondary vertical diverter channel 4-2 are all the same. In some embodiments, the diameters of the main body vertical channel 5, the main body horizontal channel 6, and the slurry outlet 7 are all the same. Specifically, the specific length of the main body vertical channel 5 in the drag reduction sleeve main body 1 can be determined based on factors such as research conditions, slurry output, and the outer diameter of the barrel foundation.

[0053] In some embodiments, the drag reduction sleeve body 1, the grouting port 2, the primary diversion layer 3, and the secondary diversion layer 4 are manufactured using 3D printing technology, which features precise manufacturing, high manufacturing efficiency, saving of raw materials, and greatly reduced manufacturing costs.

[0054] The same or similar parts between the various embodiments in this specification can be referred to each other, and each embodiment focuses on the differences from other embodiments.

[0055] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A drag reduction sleeve based on multi-layer diversion uniform grouting, characterized by: It comprises a drag reduction sleeve body (1), a grouting port (2), a primary diversion layer (3), and a secondary diversion layer (4); The primary diversion layer (3) is arranged below the grouting port (2) and is in communication with the grouting port (2); wherein the primary diversion layer (3) comprises a primary horizontal diversion channel (3-1) arranged in a circumferential direction and in communication with the grouting port (2), and a primary vertical diversion channel (3-2) arranged in a vertical direction and in communication with the primary horizontal diversion channel (3-1); The secondary diverter layer (4) is arranged below the primary diverter layer (3) and is in communication with the primary diverter layer (3); wherein the secondary diverter layer (4) comprises a secondary horizontal diverter channel (4-1) arranged along an annular direction and in communication with the primary vertical diverter channel (3-2), and a secondary vertical diverter channel (4-2) arranged along an axial direction and in communication with the secondary horizontal diverter channel (4-1); The drag-reducing sleeve body (1) is arranged below the secondary diversion layer (4) and is in communication with the secondary diversion layer (4); wherein, the drag-reducing sleeve body (1) comprises a main body vertical channel (5) arranged along the axial direction and in communication with the secondary vertical diversion channel (4-2), a main body horizontal channel (6) arranged along the circumferential direction and in communication with the main body vertical channel (5), and a slurry outlet (7) in communication with the main body horizontal channel (6); and, the slurry outlet (7) is formed by the main body vertical channel (5) extending outward in the horizontal direction and penetrating the drag-reducing sleeve body (1), so that the slurry outlet (7) can connect the main body vertical channel (5) and the outside world.

2. The drag reduction sleeve based on multi-layer diversion uniform grouting according to claim 1 is characterized in that: The number of the first-level horizontal diversion channel (3-1) is one, and it is a semicircular channel; and the first-level horizontal diversion channel (3-1) is symmetrically distributed with the grouting port (2) as the center; the number of the first-level vertical diversion channels (3-2) is two, and they are respectively connected to the two ends of the first-level horizontal diversion channel (3-1) and communicate with it.

3. The drag reduction sleeve based on multi-layer diversion uniform grouting according to claim 2 is characterized in that: The number of the secondary horizontal diversion channels (4-1) is two, and they are 90° fan-shaped channels; one of the secondary horizontal diversion channels (4-1) is symmetrically arranged with one of the primary vertical diversion channels (3-2) as the center; the other secondary horizontal diversion channel (4-1) is symmetrically arranged with the other primary vertical diversion channel (3-2) as the center; the number of the secondary vertical diversion channels (4-2) is four, and both ends of the two secondary horizontal diversion channels (4-1) are connected to a secondary vertical diversion channel (4-2) and are in communication with each other.

4. The drag reduction sleeve based on multi-layer diversion uniform grouting according to claim 3 is characterized in that: The number of the main body vertical channels (5) is four, and the four main body vertical channels (5) are respectively connected and communicated with the four secondary vertical diversion channels (4-2) in a one-to-one correspondence; the number of the main body horizontal channels (6) is four, and they are respectively communicated with the four main body vertical channels (5); and each of the main body horizontal channels (6) is provided with the slurry outlet (7) at both ends.

5. The drag reduction sleeve based on multi-layer diversion uniform grouting according to claim 4 is characterized in that: Each of the main body horizontal channels (6) is symmetrically arranged with the main body vertical channel (5) communicating therewith as the center.

6. The drag reduction sleeve based on multi-layer diversion uniform grouting according to claim 1 is characterized in that: The bottom of the drag-reducing sleeve body (1) is provided with a cutting foot (8) to facilitate cutting into the soil when sinking.

7. The drag reduction sleeve based on multi-layer flow diversion and uniform grouting according to claim 1 is characterized in that: The primary diverter layer (3) and the secondary diverter layer (4) are detachably connected; the secondary diverter layer (4) is integrally connected to the drag reduction sleeve body (1) in a detachable manner.

8. The drag reduction sleeve based on multi-layer flow diversion and uniform grouting according to claim 1 is characterized in that: The diameters of the primary horizontal diversion channel (3-1), the primary vertical diversion channel (3-2), the secondary horizontal diversion channel (4-1) and the secondary vertical diversion channel (4-2) are all the same.

9. The drag reduction sleeve based on multi-layer diversion uniform grouting according to claim 1 is characterized in that: The diameters of the main body vertical channel (5), the main body horizontal channel (6), and the pulp outlet (7) are all the same.

10. The drag reduction sleeve based on multi-layer flow diversion and uniform grouting according to claim 1 is characterized in that: The drag-reducing sleeve body (1), the grouting port (2), the primary diverter layer (3), and the secondary diverter layer (4) are manufactured using 3D printing technology.

Images