Longitudinal water seepage blind pipe heat preservation structure of railway tunnel

Abstract

The utility model discloses a railway tunnel longitudinal water seepage blind pipe heat preservation structure, which relates to the field of tunnel construction and comprises a heat preservation cover and a water seepage blind pipe, the heat preservation cover is of a U-shaped cover structure with a U-shaped groove, the heat preservation cover is laid outside the water seepage blind pipe through the U-shaped groove, and the U-shaped groove comprises a semicircular groove and a rectangular groove. The radius of the semicircular groove, the width of the rectangular groove and the radius of the peripheral wall of the water seepage blind pipe are equal. According to the scheme, the U-shaped design is adopted in the heat preservation cover, and the good supporting and heat preservation effects on the water seepage blind pipe can be achieved; the size of the U-shaped groove of the heat preservation cover is correspondingly designed according to the size of the water seepage blind pipe, so that the heat preservation cover can be tightly attached to the water seepage blind pipe after being laid on the water seepage blind pipe, and a gap between the water seepage blind pipe and the heat preservation cover is small. The concrete entity subsequently poured outside the heat preservation cover does not have holes, the quality of the lining concrete entity is greatly improved, and potential safety hazards of tunnel lining are eliminated.

Description

Technical Field

[0001] The utility model relates to the field of tunnel construction, in particular to a longitudinal water seepage blind pipe insulation structure for a railway tunnel. Background Art

[0002] In the existing railway tunnel construction in cold regions, it is necessary to set up longitudinal insulation seepage blind pipes. The longitudinal seepage blind pipes are set at the bottom of the tunnel concrete second lining to quickly remove the circumferential and longitudinal seepage water from the tunnel surrounding rock, prevent the seepage water from the rock mass from affecting the tunnel lining, and thus eliminate the potential safety hazards of the tunnel. They are an important part of the railway tunnel lining structure. In tunnels in extremely cold regions, measures need to be taken to insulate the seepage blind pipes to prevent the water in the seepage blind pipes from freezing, causing the seepage blind pipes to fail and affecting their use functions.

[0003] In the existing operation technology, there are two insulation measures for the longitudinal seepage blind pipe. One measure is as follows Figure 1 As shown, an insulation board is laid on the outside of the water seepage blind pipe to isolate cold air. The insulation board structure is straight, and is formed by splicing two straight boards into an inverted V shape to cover the water seepage blind pipe. This method creates a relatively large gap between the insulation board and the blind pipe, which not only has a poor insulation effect, but also will produce voids in the subsequent concrete pouring entity, creating a safety hazard.

[0004] Another measure is to Figure 2 As shown, the straight insulation board is cut into narrow strips, spliced ​​longitudinally along the outer edge of the seepage blind pipe into a semicircle, and wrapped around the outside of the seepage blind pipe. This is not only time-consuming, but also cumbersome and has extremely low installation efficiency. Moreover, the structures of these two insulation methods are unstable, easy to deform and fall off, and the insulation effect is low. It is inconvenient to install and fix them, which not only makes the subsequent construction process difficult and reduces production efficiency, but also creates a large gap between the insulation board and the seepage blind pipe, which brings great hidden dangers to the construction quality of the tunnel secondary lining concrete. Therefore, it is very necessary to make improvements. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a longitudinal seepage blind pipe insulation structure for railway tunnels suitable for high-cold areas, ensure the use function of the seepage blind pipe, and improve the quality of the tunnel secondary lining concrete entity.

[0006] The technical solution of the utility model is as follows: a railway tunnel longitudinal water seepage blind pipe insulation structure, characterized in that it comprises: a thermal insulation cover and a water seepage blind pipe, the thermal insulation cover is a U-shaped cover structure with a U-shaped groove, the thermal insulation cover is laid outside the water seepage blind pipe through the U-shaped groove, the U-shaped groove comprises a semicircular groove and a rectangular groove, the radius of the semicircular groove, the width of the rectangular groove and the radius of the outer peripheral wall of the water seepage blind pipe are equal.

[0007] Furthermore, a protrusion is provided at one end of the thermal insulation cover in the length direction, and a groove is provided at the other end of the thermal insulation cover in the length direction; according to the length of the water seepage blind pipe, multiple thermal insulation covers are used, and the multiple thermal insulation covers are spliced ​​and connected in sequence along their own length direction to lay the full length of the water seepage blind pipe, wherein in any two adjacent thermal insulation covers, the protrusion of one thermal insulation cover can be inserted into the groove of the other thermal insulation cover.

[0008] Furthermore, the material of the heat insulation cover is polyurethane with a density of 40kg / m 3 , the fire protection level is B1.

[0009] Furthermore, a fixing portion extending outward is provided at one end of the opening of the U-shaped groove of the heat-insulating cover.

[0010] Furthermore, the guarantee cover has two specifications, with thicknesses of 30mm or 50mm respectively; the total length of the thermal insulation cover is 1000mm, of which the length of the thermal insulation cover body is 980mm and the length of the protrusion is 20mm; the radius of the semicircular groove and the width of the rectangular groove are both 60mm or 100mm; the length of the fixing part is 80mm, and the outer wall surface of the fixing part is an arc surface tangent to the outer wall surface of the thermal insulation cover, and the radius of the arc surface is 60mm or 100mm.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. The insulation cover in this scheme adopts a U-shaped design, which has high stability and can provide good support and insulation for the seepage blind pipe. The overall structure is easier to install on the inner wall of the tunnel. After installation, it is relatively firm and not easy to fall off. In addition, the size of the U-shaped groove of the insulation cover is designed accordingly according to the size of the seepage blind pipe, so that after the insulation cover is laid on the seepage blind pipe, it can fit closely with the seepage blind pipe. The gap between the seepage blind pipe and the insulation cover is very small, so that there is no gap in the concrete entity poured outside the insulation cover later, which improves the quality of the lining concrete entity and eliminates the safety hazards of the tunnel lining.

[0013] 2. The two ends of the insulation cover adopt a concave-convex design, so that when the insulation covers are spliced, the insulation covers can be tightly connected and limited to each other, and are not easy to fall off. Moreover, the outer peripheral wall of the spliced ​​insulation cover at the connection will not protrude outward, which will not affect the installation of facilities outside the insulation cover.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The drawings described below are only some structural embodiments of the utility model.

[0016] Figure 1 This is a schematic diagram of the first installation method of the insulation board and the water seepage blind pipe in the prior art;

[0017] Figure 2 This is a schematic diagram of the second installation method of the insulation board and the water seepage blind pipe in the prior art;

[0018] Figure 3 It is a schematic diagram of the installation of the heat preservation cover and the water seepage blind pipe of the utility model;

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the heat preservation cover of the utility model;

[0020] Figure 5 It is a schematic diagram of the longitudinal section structure of the heat preservation cover of the utility model.

[0021] Reference numerals:

[0022] 1. Insulation board; 2. Seepage blind pipe; 3. Insulation cover; 4. Semicircular groove; 5. Rectangular groove; 6. Protrusion; 7. Groove; 8. Fixed part. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential" and the like indicate positions or positional relationships based on the positions 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 an indirect connection 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.

[0026] like Figure 3-Figure 5 The insulation structure of a longitudinal seepage blind pipe in a railway tunnel shown in the figure comprises: an insulation cover 3 and a seepage blind pipe 2. The insulation cover 3 is a U-shaped cover structure with a U-shaped groove. The insulation cover 3 is laid outside the seepage blind pipe 2 through the U-shaped groove, which plays an insulation role for the seepage blind pipe 2. At the same time, it solves the problem that when a linear insulation board is laid outside the seepage blind pipe 2, cavities are generated at the edge of the seepage blind pipe 2 when pouring concrete. The hidden danger of cavities in concrete is fundamentally eliminated, the work efficiency is greatly improved, and the stability of the insulation cover 3 is also highly guaranteed.

[0027] The U-shaped groove includes a semicircular groove 4 and a rectangular groove 5, and the radius of the semicircular groove 4, the width of the rectangular groove 5 and the radius of the outer peripheral wall of the water seepage blind pipe 2 are equal. That is, the size of the U-shaped groove of the heat preservation cover 3 is also designed correspondingly according to the size of the water seepage blind pipe 2, so that the heat preservation cover 3 can be closely fitted with the water seepage blind pipe 2 after being covered on the water seepage blind pipe 2, the gap between the water seepage blind pipe 2 and the heat preservation cover 3 is small, and the heat preservation effect is better. In addition, the U-shaped design can also make the heat preservation cover 3 play a good supporting and limiting role on the water seepage blind pipe 2, and the overall structure is easier to be installed on the inner wall of the tunnel, and it is relatively firm after installation and not easy to fall off.

[0028] In a further configuration, the heat preservation cover 3 is designed and installed in sections, and an annular protrusion 6 is provided at one end of the length direction of the heat preservation cover 3, and an annular groove 7 is provided at the other end of the length direction. During installation, there are multiple heat preservation covers 3, and multiple heat preservation covers 3 are sequentially spliced ​​and connected along their own length direction to lay the full length of the seepage blind pipe 2, wherein in any two adjacent heat preservation covers 3, the protrusion 6 of one heat preservation cover 3 can be inserted into the groove 7 of the other heat preservation cover 3. In this way, the heat preservation covers 3 can be tightly connected to each other, mutually limited, not easy to fall off, and convenient to splice.

[0029] Alternatively, if Figure 4 As shown, a fixing portion 8 extending outward is provided at one end of the U-shaped groove opening of the heat preservation cover 3, so that it is convenient to use some connecting parts (such as bolts, etc.) to fix the fixing portion 8 on the inner wall of the tunnel, which is convenient for the installation of the overall structure. The protrusion 6 and the groove 7 can also be arranged on the fixing portion 8.

[0030] In actual application, the material of the heat preservation cover 3 is polyurethane, with a density of 40kg / m3 and a fireproof grade of B1. The heat preservation cover 3 mainly has two specifications with the same structure but different thicknesses. Specifically, the thickness of the cover 3 is 30mm or 50mm; the total length of the heat preservation cover 3 is 1000mm, of which the main body length of the heat preservation cover 3 is 980mm, and the length of the protrusion 6 is 20mm; the radius of the semicircular groove 4 and the width of the rectangular groove 5 are both 60mm or 100mm; the length of the fixing part 8 is 80mm, and the outer wall surface of the fixing part 8 is a circular arc surface tangent to the outer wall surface of the heat preservation cover 3, and the radius of the circular arc surface is 60mm or 100mm.

[0031] Of course, various size parameters of the heat-insulating cover 3 can also be designed and adjusted according to actual installation conditions, and are not limited to the above-mentioned values.

[0032] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A railway tunnel longitudinal seepage blind pipe insulation structure, characterized in that: include: The thermal insulation cover and the water seepage blind pipe are provided with a U-shaped cover structure having a U-shaped groove. The thermal insulation cover is laid outside the water seepage blind pipe through the U-shaped groove. The U-shaped groove comprises a semicircular groove and a rectangular groove. The radius of the semicircular groove, the width of the rectangular groove and the radius of the outer peripheral wall of the water seepage blind pipe are equal.

2. The insulation structure of the longitudinal seepage blind pipe of a railway tunnel according to claim 1 is characterized in that: A protrusion is provided at one end of the heat-insulating cover in the length direction, and a groove is provided at the other end of the heat-insulating cover in the length direction; According to the length of the water seepage blind pipe, multiple insulation covers are used, and the multiple insulation covers are spliced ​​and connected in sequence along their own length direction to lay the full length of the water seepage blind pipe, wherein in any two adjacent insulation covers, the protrusion of one insulation cover can be inserted into the groove of the other insulation cover.

3. The insulation structure of the longitudinal seepage blind pipe of a railway tunnel according to claim 1 is characterized in that: The material of the heat preservation cover is polyurethane with a density of 40kg / m 3 , the fire protection level is B1.

4. The insulation structure of the longitudinal seepage blind pipe of a railway tunnel according to claim 2 is characterized in that: One end of the U-shaped groove opening of the heat-insulating cover is provided with a fixing portion extending outward.

5. The railway tunnel longitudinal seepage blind pipe insulation structure according to claim 4, characterized in that: The thickness of the heat-insulating cover is 30mm or 50mm; the total length of the heat-insulating cover is 1000mm, wherein the main body length of the heat-insulating cover is 980mm and the length of the protruding portion is 20mm; the radius of the semicircular groove and the width of the rectangular groove are both 60mm or 100mm; the length of the fixing portion is 80mm, and the outer wall surface of the fixing portion is an arc surface tangent to the outer wall surface of the heat-insulating cover, and the radius of the arc surface is 60mm or 100mm.

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