Pipeline limiting and fixing mechanism applied to self-compacting backfill groove

Abstract

The pipeline limiting and fixing mechanism comprises a pipeline, the pipeline is laid at the bottom of the groove formed in the surface of a roadbed, self-compacting backfill materials are filled between the pipeline and the groove, a plurality of counter weight bodies of semi-arc structures are arranged at the top of the pipeline, and the counter weight bodies are arranged at the bottom of the pipeline. And the counterweight bodies are uniformly arranged along the longitudinal direction of the pipeline. According to the pipeline, the balance weight bodies are arranged to counteract the buoyancy of the self-compacting backfill material, the pipeline is prevented from floating when the backfill material is initially set, and therefore it is ensured that the pipeline is stably laid in a groove.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline engineering, and in particular to a pipeline limiting and fixing mechanism used for self-compacting backfilling grooves. Background Art

[0002] Self-compacting backfill material is a special composite material in geotechnical engineering. It can flow freely and fill excavated pits or loose soil layers. It can achieve a very high density and strength without the aid of mechanical equipment for vibration compaction, thereby simplifying the backfill process and significantly improving the quality and performance of the soil. It has been widely used in infrastructure construction and urban planning projects.

[0003] However, since the initial state of the self-compacting backfill material is fluid, the strength at the time of initial setting is low, and the initial setting time is slightly longer than that of ordinary concrete, it will produce buoyancy on the pipeline, which can easily cause the pipeline to deviate from the originally planned position, causing the pipeline joints to be subjected to uneven stress, resulting in cracking or deformation of the joints, and thus leakage.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] The utility model aims to provide a pipeline limiting and fixing mechanism applied to self-compacting backfill trenches, wherein a plurality of counterweights are arranged on the pipeline to offset the buoyancy of the self-compacting backfill material, thereby preventing the pipeline from floating up when the backfill material initially sets, thereby ensuring stable laying of the pipeline in the trench.

[0006] In order to achieve the above-mentioned purpose of the utility model, the following technical solutions are specially adopted:

[0007] The utility model provides a pipeline limiting and fixing mechanism applied to self-compacting backfill grooves, comprising a pipeline, wherein the pipeline is laid at the bottom of a groove opened on the surface of a roadbed, and a self-compacting backfill material is filled between the pipeline and the groove. A plurality of counterweights with semi-arc structures are arranged at the top of the pipeline, and the counterweights are evenly arranged along the longitudinal direction of the pipeline.

[0008] The uniform longitudinal arrangement of the counterweight ensures uniform distribution of pipeline stress, prevents the entire pipeline, especially the joints, from being subjected to uneven external forces, and ensures the stability of the pipeline and the safety of the project. The semi-arc structure of the counterweight can adapt to the shape of the pipeline and will not affect the filling effect of the self-compacting backfill material around the pipeline during pouring.

[0009] Preferably, a baffle extending horizontally to the left and right sides of the pipeline is provided on the top of the counterweight body, the baffle is in contact with the inner wall surface of the groove, and the baffle is detachably arranged and connected to the counterweight body by bolts.

[0010] The flowing self-compacting backfill material will not only generate buoyancy on the pipeline, but also generate pressure on the side wall of the pipeline when it is poured to a certain height due to its good fluidity and compactness, causing a large lateral thrust. In order to reduce the impact of the lateral thrust on the pipeline, in addition to setting the counterweight body, the utility model also sets a baffle extending outward on the top of the counterweight body. The length of the baffle is selected according to the lateral width of the groove. The detachable structure enables the selection of a suitable baffle according to different groove environments, thereby maintaining the straightness and horizontality of the pipeline during the pouring process.

[0011] Preferably, a rubber cushion layer is provided on the inner wall surface of the counterweight body in contact with the pipe.

[0012] A rubber cushion layer is provided on the interface between the counterweight and the pipeline, which can play a buffering role and prevent wear caused by friction between metal and metal. It also helps to fix the position of the counterweight and reduce the impact of the counterweight sliding due to construction vibration or other external forces on the pipeline.

[0013] Preferably, all the counterweights have the same shape and are located at the same fitting position on each section of the pipe, so as to ensure that the pressing effect of the counterweight on each section of the pipe is relatively uniform.

[0014] Preferably, supports are further provided at the bottom of the pipeline, and the supports are evenly placed at the bottom of the pipeline and the bottom of the groove, and the number of supports provided for each section of the pipeline is not less than two.

[0015] The main purpose of setting supports at the bottom of the pipeline is to suspend the pipeline and ensure that the self-compacting backfill material can be fully backfilled to the bottom of the pipeline and the corners on both sides to form a complete pipeline foundation. The number of supports set for each section of the pipeline is not less than two, so that the supporting force can be more evenly distributed at the bottom of the pipeline to prevent damage to the pipeline due to uneven stress concentration.

[0016] Preferably, the support is designed to be split into left and right parts, and the design height is 100-150mm.

[0017] The support adopts a left-right split design, which is separated from each other at the center of the bottom of the pipeline. During the first pouring, the backfill material on both sides of the pipeline can flow freely, avoiding a large height difference between the two sides, and can provide further support and stability for the pipeline after the self-compacting backfill material finally sets. This design ensures that there is enough self-compacting backfill material to form a complete pipeline foundation.

[0018] Preferably, the soil arc foundation support angle of the pipeline is not less than 120°. For self-compacting backfill materials, the soil arc foundation support angle within this range can provide effective support and protection for both rigid and flexible pipelines, ensuring the safety and long-term operation of the pipeline.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] (1) Based on the characteristics of the trench using self-compacting backfill materials, a pipe limit fixing mechanism with counterweight anti-floating is designed. During pouring, it can offset the buoyancy and lateral thrust generated by the self-compacting backfill material on the pipe during the initial setting period, ensuring the stable laying of the pipe in the trench and the uniform distribution of pipe stress.

[0021] (2) The pipeline limiting and fixing mechanism is also provided with a support based on the self-compacting backfill material, which is conducive to fully backfilling the backfill material during pouring and achieving the effect of pipe-soil integration after pouring.

[0022] (3) The utility model also defines the pipeline body so that it can better meet the requirements for pipeline strength and stability in the self-compacting backfill trench. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0024] Figure 1 A schematic diagram of a pipeline limiting and fixing mechanism provided in an embodiment of the utility model.

[0025] Among them, 1-roadbed, 2-trench, 3-pipeline, 4-counterweight, 5-baffle, 6-support, 7-soil arc foundation support angle. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but those skilled in the art will understand that the embodiments described below are part of the embodiments of the utility model, rather than all of the embodiments, and are only used to illustrate the utility model, and should not be considered as limiting the scope of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the utility model. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0027] 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.

[0028] 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 fixed connection, detachable connection, or integrated connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be internal connection 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.

[0029] In order to more clearly explain the technical solution of the present invention, it is described in the form of specific embodiments below.

[0030] Example

[0031] like Figure 1 As shown, this embodiment provides a pipeline limit fixing mechanism, the pipeline is laid in a groove opened on the roadbed surface, and the groove is backfilled with a self-compacting backfill material. Considering that the initial state of the self-compacting backfill material is fluid, when pouring it into the groove at the beginning of construction, due to its fluidity and compactness, it will generate buoyancy and lateral thrust on the pipeline. Therefore, the utility model adopts a counterweight anti-floating method to offset the adverse effects of the self-compacting backfill material on the pipeline during pouring.

[0032] Among them, a number of counterweights are arranged on the outside of the top of the pipe. Their appearance is a semi-arc structure that matches the appearance of the pipe and is evenly spaced along the axial direction of the pipe. This structure is not only conducive to the disassembly and assembly of the counterweight on the pipe, but also reduces the impact on the filling effect of the self-compacting backfill material around the pipe during pouring. The counterweight is made of metal and has a certain weight. After being set on the top of the pipe, the increase in its own weight can effectively offset the upward buoyancy of the self-compacting backfill material on the pipe. In addition, all counterweights adopt the same shape and the fitting position on each section of the pipe is also the same, ensuring that the pressing effect of the counterweight on each section of the pipe is relatively uniform.

[0033] A rubber cushion layer is also provided on the inner wall surface where the counterweight contacts the pipe. The rubber cushion layer is mainly made of rubber and plays a buffering role to prevent metal-to-metal friction between the counterweight and the pipe. In addition, it can also help fix the position of the counterweight on the pipe and reduce the impact of the counterweight sliding due to construction vibration or other external forces on the pipe.

[0034] On the other hand, in order to offset the lateral thrust of the self-compacting backfill material on the pipeline, a baffle is also provided on the top of the semi-arc structure of the counterweight body. The baffle extends horizontally to the left and right sides of the pipeline and contacts the inner wall surface of the groove. By pressing the baffle against the groove, the straightness and horizontality of the pipeline can be maintained during the pouring process.

[0035] Depending on the different foundation and road conditions, the shape and size of the trench excavation will vary. Therefore, the baffle of the counterweight body is set as a detachable structure, which is connected to the counterweight body by bolts. It is convenient to equip and disassemble, and the baffle of appropriate length can be selected according to the specific trench width to improve construction efficiency.

[0036] At least two supports are set at the bottom of each section of the pipeline, which not only provide uniform support for the pipeline and prevent it from moving and shaking, but also suspend the bottom of the pipeline to ensure that the self-compacting backfill material can be fully backfilled to the bottom of the pipeline and the corners on both sides to form a complete pipeline foundation.

[0037] The support adopts a left-right split design. The left and right supports are separated from each other in the center of the bottom of the pipe, so that the backfill material on both sides of the pipe can flow freely during the first pouring, avoiding a large height difference between the two sides, and providing further support and stability for the pipe after the self-compacting backfill material is finally set. Considering that the bottom of the pipe needs to have a certain height of self-compacting backfill material, the preferred design height of the support is 100-150mm.

[0038] The pipeline body can be a rigid pipeline or a flexible pipeline. Regardless of whether it is a rigid pipeline or a flexible pipeline, the soil arc foundation support angle must be set within a range of not less than 120° to ensure effective support and protection for the pipeline in the trench using self-compacting backfill material.

[0039] Finally, it is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the principles and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A pipe position limiting and fixing mechanism used in self-compacting backfill trenches, characterized in that: It comprises a pipeline, which is laid at the bottom of a groove opened on the roadbed surface, and a self-compacting backfill material is filled between the pipeline and the groove. A plurality of semi-arc-shaped counterweights are arranged at the top of the pipeline, and the counterweights are evenly spaced along the axial direction of the pipeline.

2. The pipeline limiting and fixing mechanism according to claim 1, characterized in that: The top of the counterweight body is provided with baffles extending horizontally to the left and right sides of the pipeline, the baffles are in contact with the inner wall surface of the groove, and the baffles are detachably arranged and connected to the counterweight body by bolts.

3. The pipeline position limiting and fixing mechanism according to claim 2, characterized in that: The inner wall surface of the counterweight body in contact with the pipe is provided with a rubber cushion layer.

4. The pipeline position limiting and fixing mechanism according to claim 3, characterized in that: All the counterweights have the same shape and are located at the same fitting position on each section of the pipe.

5. The pipeline limiting and fixing mechanism according to claim 1, characterized in that: The bottom of the pipeline is also provided with supports, which are evenly placed at the bottom of the pipeline and the bottom of the groove, and the number of supports provided for each section of the pipeline is not less than two.

6. The pipeline position limiting and fixing mechanism according to claim 5, characterized in that: The support is designed to be split into left and right parts, and the design height is 100-150mm.

7. The pipeline position limiting and fixing mechanism according to claim 1, characterized in that: The soil arc foundation support angle of the pipeline is not less than 120°.

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