Backfilling structure for pipeline water delivery shaft construction

Abstract

The utility model relates to the technical field of constructional engineering, and particularly discloses a backfilling structure for pipeline water delivery shaft construction, a water delivery pipeline is nested in a shaft, a gap is formed between the outer wall of the water delivery pipeline and the inner wall of the shaft, and C20 expansive concrete is filled in the gap. The top face of the C20 expansive concrete is flush with the top face of the vertical shaft in height. The water conveying pipeline is directly contained in the vertical shaft, the high-strength C20 expansive concrete is filled in the gap between the water conveying pipeline and the vertical shaft, and after the high-strength C20 expansive concrete is solidified, all parts around the water conveying pipeline are compactly backfilled. And the solidified C20 expansive concrete covers the whole water conveying pipeline, so that the whole water conveying pipeline can be protected, and extrusion of an external mountain body on the vertical shaft and the water conveying pipeline is resisted.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a backfill structure used for the construction of a pipeline water delivery shaft. Background Art

[0002] A water shaft can serve as a vertical channel connecting different levels, allowing water to flow from one height to another. It can also resist lateral pressure during construction and use, including water, soil and rock pressure, to ensure the stability and safety of the structure. For example, in a pumped storage power station, the shaft may be used to extract water from a higher reservoir to release energy when needed.

[0003] The wall of a conventional water shaft is made of lined concrete, and the backfill structure between the water shaft and the pipeline is usually formed by concrete backfill. During the drainage process of the water shaft, the water inside the water shaft is continuously discharged, and the water level in the shaft continues to drop, while the mountain outside the shaft wall still contains a large amount of groundwater, forming a large pressure difference on both sides of the shaft wall. Concrete backfill alone cannot withstand the pressure difference for a long time. Therefore, it is easy to cause structural damage to the shaft wall over time. Utility Model Content

[0004] In order to solve the problem in the prior art that the water conveyance shaft and the pipeline backfill structure cannot withstand the greater pressure outside the shaft wall, the utility model provides a backfill structure for the construction of a pipeline water conveyance shaft.

[0005] The technical solution adopted by the utility model is: a backfill structure for the construction of a pipeline water supply shaft, wherein the water supply pipeline is nested in the shaft, a gap is provided between the outer wall of the water supply pipeline and the inner wall of the shaft, the gap is filled with C20 expansive concrete, and the top surface height of the filled C20 expansive concrete is flush with the top surface of the shaft.

[0006] Furthermore, an anti-slip structure is provided on the outer wall of the water delivery pipeline.

[0007] Furthermore, a plurality of support frames are arranged in the gap, and the plurality of support frames are wrapped by the C20 expansive concrete.

[0008] Furthermore, the support frame includes a plurality of vertical rods and a plurality of oblique rods connected to the vertical rods, the vertical rods are arranged parallel to the central axis of the shaft, and the oblique rods intersect with the vertical rods.

[0009] Furthermore, the inclined rod includes a first inclined rod facing one side of the water pipeline and a second inclined rod that is mirror-symmetrical to the first inclined rod along the central axis of the vertical rod; wherein, one end of the first inclined rod is connected to the vertical rod, and the other end of the first inclined rod abuts against the outer wall of the water pipeline; one end of the second inclined rod is connected to the vertical rod, and the other end of the second inclined rod abuts against the inner wall of the shaft.

[0010] Furthermore, adjacent first oblique rods are grouped in pairs, and in each group of two first oblique rods, one ends of the two first oblique rods extend toward the vertical rod and intersect on the vertical rod, and the other ends of the two first oblique rods respectively abut against the outer side wall of the water pipe, so that the two first oblique rods form a V-shaped structure; the second oblique rods are grouped in pairs, and in each group of two second oblique rods, one ends of the two second oblique rods extend toward the vertical rod and intersect on the vertical rod, and the other ends of the two second oblique rods respectively abut against the outer side wall of the vertical shaft, so that the two second oblique rods form a V-shaped structure.

[0011] Furthermore, the tops of two adjacent support frames are connected with fixed beams, the fixed beams are arc-shaped, and all the fixed beams are connected in sequence to jointly form a support top of the support frame, and the support top is wrapped by the C20 expansive concrete.

[0012] The beneficial effect of the utility model is that the water pipeline is directly placed in the shaft, and the gap between the water pipeline and the shaft is filled with high-strength C20 expansive concrete, and after solidification, all parts around the water pipeline are densely backfilled. The solidified C20 expansive concrete will cover the water pipeline as a whole, which can protect the water pipeline as a whole and resist the squeezing of the shaft and the water pipeline by the external mountain. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a site schematic diagram of the backfill structure of the eye-red pipeline water supply shaft construction of the utility model;

[0014] Figure 2 is a structural schematic diagram of the support frame;

[0015] Figure 3 A schematic diagram of a support frame being arranged in a gap;

[0016] Figure 4 It is a schematic diagram of the connection between the fixed beam and the support frame;

[0017] Figure 5 This is a top view of the shaft.

[0018] Figure numerals: 1. water pipe, 2. vertical shaft, 3. gap, 4. C20 expansive concrete, 5. support frame, 51. vertical rod, 52. diagonal rod, 521. first diagonal rod, 522. second diagonal rod, 53. supporting top, 6. fixed beam. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0020] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to those skilled in the art that these specific details are not necessary to implement the present invention. In other examples, in order to avoid obscuring the present invention, well-known structures, circuits, materials or methods are not specifically described.

[0021] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present invention.

[0023] The following is combined with Figure 1-5 The embodiments of the present utility model are described in detail.

[0024] Example 1

[0025] The utility model relates to a backfill structure for the construction of a pipeline water supply shaft 2, wherein a water supply pipeline 1 is nested in the shaft 2, a gap 3 is provided between the outer wall of the water supply pipeline 1 and the inner wall of the shaft 2, the gap 3 is filled with C20 expansive concrete 4, and the top surface height of the filled C20 expansive concrete 4 is flush with the top surface of the shaft 2.

[0026] Specifically, Figure 1 As shown, the pipeline water supply shaft 2 includes a shaft 2 and a water supply pipeline 1 nested in the shaft 2. Generally, the diameter of the shaft 2 is as high as tens of meters or even hundreds of meters, and the diameter of the water supply pipeline 1 is also as high as tens of meters. In this application, a shaft 2 with a diameter of 100m and a water supply pipeline 1 with a diameter of 50m are taken as examples. In order to avoid the water supply pipeline 1 from tilting in the shaft 2, resulting in uneven radial pressure of the water supply pipeline 1, when the water supply pipeline 1 is placed in the shaft 2, it is necessary to backfill between the water supply pipeline 1 and the shaft 2 to ensure the stability and safety of the water supply pipeline 1 in the shaft 2. Therefore, a certain gap 3 is provided between the outer wall of the water supply pipeline 1 and the inner wall of the shaft 2, and the existence of this gap 3 is to accommodate the backfill medium. The backfill medium can be circulating cement mortar or lightweight concrete, etc., as long as it has good compressibility, impermeability and stability. Since the strength of expansive concrete can reach several times that of ordinary concrete, its compressive and flexural strengths are improved, therefore, the backfill medium in this application is preferably C20 expansive concrete 4.

[0027] C20 expansive concrete 4 is selected as the backfill medium because it has high strength and stability and can withstand the pressure and stress generated during the backfill process. At the same time, its expansion performance can effectively fill the gaps that may appear in the backfill area and improve the density of the backfill.

[0028] In addition, in order to prevent rainwater or other external water sources from entering the gap 3 and to ensure the overall stability and sealing of the backfill structure, the top surface height of the C20 expansive concrete 4 is set to be flush with the top surface of the shaft 2. In this way, even if the ground surface settles or deforms, the backfill structure can still maintain its original shape and function, ensuring the normal operation of the water pipeline 1.

[0029] Example 2

[0030] This embodiment is an improvement made on the basis of the embodiment 1, and the difference lies in that a protrusion is provided on the outer wall of the water delivery pipe 1.

[0031] Specifically, in order to improve the bonding strength between the backfill medium and the water pipeline 1 and the shaft 2 and make the entire backfill structure more stable, a raised anti-skid structure may be provided on the outer wall of the water pipeline 1, and anti-skid patterns, anti-skid particles or an anti-skid coating may also be provided.

[0032] Example 3

[0033] This embodiment is an improvement made on the basis of the embodiment 1, and the difference is that a plurality of support frames 5 are arranged in the gap 3, and the plurality of support frames 5 are wrapped by the C20 expansive concrete 4. The support frame 5 includes a vertical rod 51 and a plurality of oblique rods 52 connected to the vertical rod 51, the vertical rod 51 is arranged parallel to the central axis of the shaft 2, and the oblique rods 52 intersect with the vertical rod 51.

[0034] Specifically, in order to further strengthen the water pipeline 1 and the shaft 2 to resist the pressure from the external mountain, a plurality of support frames 5 are arranged in the gap 3 between the outer wall of the water pipeline 1 and the inner wall of the shaft 2. The shape and structure of the support frames 5 are not limited as long as they can play a supporting role. Figure 2 As shown, the support frame 5 in the present application is composed of a vertical rod 51 and a plurality of inclined rods 52 located on the vertical rod 51 and facing both the water pipe 1 and the side wall of the shaft 2. The vertical rod 51 is parallel to the central axis of the shaft 2, and the inclined rods 52 form an angle with the vertical rod 51, and the size of the angle can be adjusted as needed, as long as the inclined rods 52 are not parallel to the vertical rods 51. In addition, the inclination direction of all the inclined rods 52 can be inclined in the same direction or in different directions.

[0035] After the support frame 5 is placed in the gap 3, it is wrapped with C20 expansion concrete 4. The support frame 5 not only stabilizes the structure of the C20 expansion concrete 4, but also plays a role in dispersing pressure. These support frames 5 are placed in the gap 3 and are tightly combined with the C20 expansion concrete 4 to form a solid whole. So that the entire backfill structure is more stable.

[0036] Example 4

[0037] This embodiment is an improvement on the basis of Embodiment 3, and the difference lies in that the inclined rod 52 includes a first inclined rod 521 facing one side of the water pipeline and a second inclined rod 522 which is mirror-symmetrical to the first inclined rod 521 along the central axis of the vertical rod 51; wherein, one end of the first inclined rod 521 is connected to the vertical rod 51, and the other end of the first inclined rod 521 abuts against the outer wall of the water pipeline; one end of the second inclined rod 522 is connected to the vertical rod 51, and the other end of the second inclined rod 522 abuts against the inner wall of the shaft 2.

[0038] Specifically, in order to further improve the ability of the water pipeline 1 and the vertical shaft 2 to resist the pressure from the external mountain, the inclined rod 52 is arranged to be a first inclined rod 521 facing one side of the water pipeline and a second inclined rod 522 that is mirror-symmetrical to the first inclined rod 521, that is, the second inclined rod 522 faces the inner wall of the vertical shaft 2, so that the two symmetrical second inclined rods 522 jointly support the water pipeline 1 and the vertical shaft 2.

[0039] Example 5

[0040] This embodiment is an improvement on the embodiment 4, and the difference lies in that adjacent first oblique rods 521 are grouped in pairs, and in each group of two first oblique rods 521, one ends of the two first oblique rods 521 extend toward the vertical rod 51 and intersect on the vertical rod 51, and the other ends of the two first oblique rods 521 respectively abut against the outer side wall of the water pipe 1, so that the two first oblique rods 521 form a V-shaped structure; the second oblique rods 522 are grouped in pairs, and in each group of two second oblique rods 522, one ends of the two second oblique rods 522 extend toward the vertical rod 51 and intersect on the vertical rod 51, and the other ends of the two second oblique rods 522 respectively abut against the outer side wall of the shaft 2, so that the two second oblique rods 522 form a V-shaped structure.

[0041] Specifically, Figure 2 and Figure 3 As shown, the support frame 5 is in two mirror-symmetrical "K" shapes. Such a design enables the inclined rods 52 to resist the outside of the mountain when the shaft 2 is squeezed by the external mountain, because the inclined rods 52 are against the outer wall of the water pipe 1. Moreover, the two first inclined rods 521 form a V shape, forming a triangular support structure with the side wall of the water pipe 1, and the two second inclined rods 522 also form a V shape, forming a triangular support structure with the side wall of the shaft 2. Compared with a rectangle or a quadrilateral, the triangular structure is the most stable. Furthermore, the angle between the two inclined rods 52 can be 60°, that is, the most stable equilateral triangle support structure is formed.

[0042] Example 6

[0043] This embodiment is an improvement made on the basis of Embodiment 3, and the difference lies in that the tops of two adjacent support frames 5 are connected with fixed beams 6, and the fixed beams 6 are arc-shaped. All the fixed beams 6 are connected in sequence to enclose together to form a support top 53 of the support frame 5, and the support top 53 is wrapped by the C20 expansive concrete 4.

[0044] Specifically, in order to further improve the ability of the water pipeline 1 and the shaft 2 to resist the pressure from the external mountain, all the support frames 5 are connected, such as Figure 4 As shown, fixed beams 6 are connected to the tops of two adjacent support frames 5, and all the fixed beams 6 are connected in sequence to form a support top 53 of the support frame 5. Of course, these fixed beams 6 can be straight lines or curves, but in order to make the backfill medium evenly distributed when under pressure, the firmness of the overall structure is further enhanced. Figure 5As shown, the fixed beam 6 is designed to be arc-shaped, so that the enclosed support top 53 is a circle. At the same time, the fixed beam 6 between two adjacent support frames 5 forms a stable and safe structural system under the wrapping of the backfill medium.

[0045] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A backfill structure for the construction of a pipeline water supply shaft, comprising a shaft (2) and a water supply pipeline (1) nested in the shaft (2), characterized in that: A gap (3) is provided between the outer wall of the water delivery pipeline (1) and the inner wall of the vertical shaft (2); the gap (3) is filled with C20 expansive concrete (4); the top surface of the filled C20 expansive concrete (4) is flush with the top surface of the vertical shaft (2).

2. The backfill structure for pipeline water supply shaft construction according to claim 1, characterized in that: A protrusion is provided on the outer wall of the water delivery pipe (1).

3. The backfill structure for pipeline water supply shaft construction according to claim 1, characterized in that: A plurality of support frames (5) are arranged in the gap (3), and the plurality of support frames (5) are wrapped by the C20 expansive concrete (4).

4. The backfill structure for pipeline water supply shaft construction according to claim 3, characterized in that: The support frame (5) comprises a vertical rod (51) and a plurality of inclined rods (52) connected to the vertical rod (51); the vertical rod (51) is arranged parallel to the central axis of the shaft (2); and the inclined rods (52) intersect with the vertical rod (51).

5. The backfill structure for pipeline water supply shaft construction according to claim 4, characterized in that: The inclined rod (52) comprises a first inclined rod (521) facing the side of the water pipeline (1) and a second inclined rod (522) mirror-symmetrical to the first inclined rod (521) along the central axis of the vertical rod (51); Wherein, one end of the first oblique rod (521) is connected to the vertical rod (51), and the other end of the first oblique rod (521) is in contact with the outer wall of the water delivery pipe (1); One end of the second oblique rod (522) is connected to the vertical rod (51), and the other end of the second oblique rod (522) is in contact with the inner wall of the vertical shaft (2).

6. The backfill structure for pipeline water supply shaft construction according to claim 5, characterized in that: Adjacent first oblique rods (521) form a group of two, and in each group of two first oblique rods (521), one end of the two first oblique rods (521) extends toward the vertical rod (51) and intersects with the vertical rod (51), and the other ends of the two first oblique rods (521) respectively abut against the outer side wall of the water pipe (1), so that the two first oblique rods (521) form a V-shaped structure; and the second oblique rods (522) form a group of two, and in each group of two second oblique rods (522), one end of the two second oblique rods (522) extends toward the vertical rod (51) and intersects with the vertical rod (51), and the other ends of the two second oblique rods (522) respectively abut against the outer side wall of the vertical shaft (2), so that the two second oblique rods (522) form a V-shaped structure.

7. The backfill structure for pipeline water supply shaft construction according to claim 3, characterized in that: The tops of two adjacent support frames (5) are connected with fixed beams (6), the fixed beams (6) are arc-shaped, and all the fixed beams (6) are connected in sequence to jointly enclose a support top (53) of the support frame (5), and the support top (53) is wrapped by the C20 expansive concrete (4).

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