Anti-freezing structure suitable for tunnel in alpine region

Abstract

The utility model relates to the technical field of tunnel engineering, and provides an anti-freezing structure suitable for a tunnel in an alpine region, which comprises a steel plate component arranged on the inner side of an arch wall secondary lining, an interlayer space is formed between the steel plate component and the arch wall secondary lining, and the steel plate component is provided with a grouting hole communicated with the interlayer space. The interlayer space is filled with foam concrete through the grouting holes to form a heat preservation layer, the drainage pipe comprises a first section pre-buried in the heat preservation layer and a second section arranged outside the heat preservation layer, a water inlet of the first section corresponds to a lining crack to collect lining crack seepage water, the first section extends downwards in the circumferential direction of the tunnel to be communicated with the second section, and the second section extends downwards in the circumferential direction of the tunnel to be communicated with the heat preservation layer. And the second section is communicated with an existing tunnel drainage system. The structure can be quickly assembled, the influence of construction on tunnel passing is reduced, the good heat preservation effect is achieved, the lining can be effectively protected, and frost heaving damage is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to tunnel engineering technical field especially a kind of anti-freezing structure suitable for tunnel in alpine region. BACKGROUND

[0002] High-cold region tunnel, mostly in plateau and high latitude area, climate is bad, produced various diseases, common disease manifestation, such as concrete lining cracking, frost heaving, ice, hot melt subsidence etc., wherein lining cracking seepage and frost heaving combined disease form is particularly prominent. The seepage in lining crack under the influence of repeated frost heaving, crack width is constantly enlarged, so that the lining that is only microcrack, under the above-mentioned effect, form macroscopic large crack, further lead to lining seepage overflow to driving lane, driving lane surface formed ice layer, seriously endanger the driving safety in tunnel.

[0003] The existing processing scheme is to repair the lining cracking more seriously after ice layer ablation, but this will form new seepage channel, and under the repeated frost heaving effect, repeat the above process, so that the original microcrack form new large crack.

[0004] In view of this, it is necessary to provide an anti-freezing structure suitable for tunnel in alpine region to solve or at least alleviate the above-mentioned defects. CONTENT OF UTILITY MODEL

[0005] The main purpose of the utility model is to provide an anti-freezing structure suitable for tunnel in alpine region, to solve the technical problem that lining crack in tunnel in alpine region is repeatedly repaired in prior art, and original microcrack forms new large crack under the repeated frost heaving effect.

[0006] To achieve the above-mentioned purpose, the utility model provides an anti-freezing structure suitable for tunnel in alpine region, including the steel plate assembly arranged in the inner side of secondary lining of arch wall, the steel plate assembly and the secondary lining of arch wall form the space of the layer, the steel plate assembly is equipped with the grouting hole that communicates the space of the layer, and the foamed concrete is filled in the space of the layer to form the heat preservation layer by the grouting hole, the steel plate assembly includes the first end and the second end opposite along the circumferential direction of tunnel, and the first end and the second end are overlapped at the corresponding tunnel arch foot.

[0007] Preferably, the steel plate assembly includes first corrugated steel plate, second corrugated steel plate and third corrugated steel plate connected in sequence along the circumferential direction of tunnel, one end of the first corrugated steel plate away from the second corrugated steel plate is overlapped at tunnel arch foot, one end of the third corrugated steel plate away from the second corrugated steel plate is overlapped at tunnel arch foot, one end of the second corrugated steel plate and the first corrugated steel plate are overlapped, and the other end of the second corrugated steel plate and the third corrugated steel plate are overlapped.

[0008] Preferably, the first corrugated steel plate comprises first corrugated steel plate units connected in sequence along the tunnel extension direction, each first corrugated steel plate unit comprises a corrugated steel plate body, and a first connecting plate and a second connecting plate connected at two ends of the corrugated steel plate body respectively, the first connecting plate is provided with a first connecting hole for bolt penetration, the second connecting plate is provided with a second connecting hole for bolt connection, the i-th first corrugated steel plate unit is connected with the i+1-th first corrugated steel plate unit by penetrating the second connecting hole of the second connecting plate of the i-th first corrugated steel plate unit and the first connecting hole of the first connecting plate of the i+1-th first corrugated steel plate unit through a bolt; wherein i is a positive integer, i≥1.

[0009] Preferably, a drain pipe is further included, the drain pipe comprises a first section embedded in the thermal insulation layer and a second section arranged outside the thermal insulation layer, a water inlet of the first section corresponds to the lining crack to collect water seepage of the lining crack, the first section extends downward along the tunnel circumferential direction and communicates with the second section, and the second section communicates with an existing tunnel drainage system.

[0010] Preferably, the first section comprises a first sub-section and a second sub-section, the first sub-section extends into the lining crack, and the second sub-section is arranged on the secondary lining of the arch wall, a water inlet of the second sub-section communicates with a water outlet of the first sub-section, and a water outlet of the second sub-section communicates with the second section.

[0011] Preferably, the first section is a PVC pipe, and the second section is made of thermal insulation material.

[0012] Preferably, the first end is overlapped at a tunnel arch springing through a first L-shaped steel plate, the second end is overlapped at the tunnel arch springing through a second L-shaped steel plate, the first L-shaped steel plate and the second L-shaped steel plate are oppositely arranged on two sides of the tunnel, and the first L-shaped steel plate and the second L-shaped steel plate are both arranged along the extension direction of the tunnel.

[0013] Preferably, the thickness of the thermal insulation layer is set to be between 4mm and 6mm.

[0014] Preferably, the length of the corrugated steel plate body is set to be 1m.

[0015] Preferably, the circumferential length of the first corrugated steel plate and the third corrugated steel plate is set to be 8m.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] The application can be quickly assembled, reduces the influence of construction on tunnel passing, has good heat preservation effect, can effectively protect the lining and prevent frost heaving damage. Specifically, the steel plate assembly is used as the main structure, is fully paved on the inner side of the secondary lining of the arch wall, after the steel plate assembly is assembled, the foamed concrete is injected into the reserved grouting hole of the steel plate assembly to form a heat preservation layer, the foamed concrete has good heat preservation effect, the steel plate assembly is used as the main structure, the structure strength is guaranteed, installation is facilitated, the built tunnel can be quickly modified, the heat preservation layer is formed on the tunnel lining, frost heaving damage is effectively prevented, and the lining is effectively protected. Compared with the prior art, the application also has low cost, obvious economic advantages and promotion value. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structure shown in these drawings without creative labor.

[0019] Figure 1 The structure schematic diagram after the heat preservation layer is applied in an embodiment of the present application;

[0020] Figure 2 The structure schematic diagram after the heat preservation layer is applied in an embodiment of the present application; Figure 1 The enlarged schematic diagram of A in the structure schematic diagram of the present application;

[0021] Figure 3 The structure schematic diagram after the drainage pipe is applied in an embodiment of the present application;

[0022] Figure 4 The structure schematic diagram after the heat preservation layer is applied in an embodiment of the present application; Figure 3 The enlarged schematic diagram of B in the structure schematic diagram of the present application;

[0023] Figure 5 The cross-sectional schematic diagram of the steel plate assembly in an embodiment of the present application;

[0024] Figure 6 The schematic diagram of the steel plate assembly in an embodiment of the present application is unfolded.

[0025] The purpose, function characteristics and advantages of the present application will be further described with reference to the drawings.

[0026] Explanation of reference numerals:

[0027] 10, steel plate assembly; 110, first end; 120, second end; 130, first corrugated steel plate; 131, corrugated steel plate body; 132, first connecting plate; 133, second connecting plate; 140, second corrugated steel plate; 150, third corrugated steel plate; 160, first L-shaped steel plate; 20, thermal insulation layer; 30, drain pipe; 310, first section; 311, first sub-section; 312, second sub-section; 320, second section; 40, secondary lining of arch wall; 50, lining crack; 60, existing tunnel drainage system. DETAILED DESCRIPTION

[0028] It should be understood that the specific embodiments described herein are merely exemplary and do not limit the present application.

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as described in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0031] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of those skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0032] Please refer to the drawings Figures 1 to 6The utility model provides an embodiment suitable for the anti -freezing structure of high and cold area tunnel, including the steel sheet subassembly 10 in the inside of arch wall secondary lining 40, form the interlayer space (not shown in the drawing) between steel sheet subassembly 10 and arch wall secondary lining 40, the grouting hole (not shown in the drawing) of steel sheet subassembly 10 is equipped with the intercommunication of interlayer space, and the foam concrete is filled in the interlayer space and forms the heat preservation layer 20 through the grouting hole, steel sheet subassembly 10 includes the first end 110 and the second end 120 opposite along the tunnel ring, and the first end 110 and the second end 120 are overlapped at the corresponding tunnel arch foot.

[0033] In the scheme, the steel sheet subassembly 10 is used as the main structure, and is fully paved on the inside of the arch wall secondary lining 40. Preferably, the steel sheet subassembly 10 adopts an arch structure matched with the arch wall secondary lining 40, and a 5cm gap, i.e. the interlayer space, is reserved between the steel sheet subassembly 10 and the arch wall secondary lining 40. After the steel sheet subassembly 10 is assembled, the foam concrete is injected into the grouting hole reserved in the steel sheet subassembly 10 to form the heat preservation layer 20. The grouting construction is preferably started from both sides, and the grouting work in the vault area is finally performed to avoid the cavity. The foam concrete has good heat preservation effect, and the material is widely used in the prefabricated layer heat preservation plate in the construction engineering field. The steel sheet subassembly 10 is used as the main structure, which not only guarantees the structural strength, but also facilitates the installation and enables the rapid reconstruction of the built tunnel. The heat preservation layer 20 is formed on the tunnel lining to effectively prevent the frost heaving damage.

[0034] As a preferred embodiment, as shown in the figure, Figure 6 The steel sheet subassembly 10 includes the first corrugated steel plate 130, the second corrugated steel plate 140 and the third corrugated steel plate 150 connected in sequence along the tunnel ring. The first corrugated steel plate 130 is overlapped at the tunnel arch foot away from the second corrugated steel plate 140. The third corrugated steel plate 150 is overlapped at the tunnel arch foot away from the second corrugated steel plate 140. One end of the second corrugated steel plate 140 is overlapped with the first corrugated steel plate 130. The other end of the second corrugated steel plate 140 is overlapped with the third corrugated steel plate 150.

[0035] Specifically, the corrugated steel plates are laid inside the secondary lining 40 of the arch wall, preferably, the specifications of the corrugated steel plates are 200*50mm (the size should not be too large to avoid causing intrusion), the thickness is 4mm, the first corrugated steel plate 130 and the third corrugated steel plate 150 have a ring length of 8m and a longitudinal width of 1m, and the ring length of the second corrugated steel plate 140 at the arch top can be adjusted according to the specific size, and the longitudinal width is 1m, preferably, the first corrugated steel plate 130, the second corrugated steel plate 140 and the third corrugated steel plate 150 are connected in a lap joint manner with a lap joint length of 25cm and are connected by bolts. By using the connection mode of the first corrugated steel plate 130, the second corrugated steel plate 140 and the third corrugated steel plate 150, quick assembly can be realized. Preferably, the grouting holes are arranged on the first corrugated steel plate 130 and the third corrugated steel plate 150.

[0036] As a preferred embodiment, the first corrugated steel plate 130 comprises first corrugated steel plate units (not shown in the figure) connected in sequence along the tunnel extension direction, each first corrugated steel plate unit comprises a corrugated steel plate body 131 and first and second connecting plates 132 and 133 connected to both ends of the corrugated steel plate body 131 respectively, the first connecting plate 132 is provided with first connecting holes for bolts to pass through, the second connecting plate 133 is provided with second connecting holes for bolt connection, and the i-th first corrugated steel plate unit is connected with the (i+1)-th first corrugated steel plate unit by bolts passing through the second connecting hole of the second connecting plate 133 of the i-th first corrugated steel plate unit and the first connecting hole of the first connecting plate 132 of the (i+1)-th first corrugated steel plate unit; wherein i is a positive integer, i≥1.

[0037] Specifically, the adjacent two first corrugated steel plate units are connected by the first and second connecting plates 132 and 133, which can realize the longitudinal quick assembly of the first corrugated steel plate units, and the forms of the second and third corrugated steel plates 140 and 150 can be consistent with those of the first corrugated steel plate units, which will not be described here.

[0038] As another preferred embodiment, the drainage pipe 30 is further included, the drainage pipe 30 comprises a first section 310 pre-buried in the thermal insulation layer 20 and a second section 320 arranged outside the thermal insulation layer 20, the water inlet of the first section 310 corresponds to the lining crack 50 to collect the seepage water from the lining crack 50, the first section 310 extends downward along the ring direction of the tunnel and communicates with the second section 320, and the second section 320 communicates with the existing tunnel drainage system 60.

[0039] The water inlet of the first section 310 corresponds to the lining crack 50, which can directly and effectively collect the seepage water from the lining crack 50. Through the collection effect of the drainage pipe 30, the seepage water from the lining crack 50 can be quickly introduced into the existing tunnel drainage system 60, thereby reducing the disease caused by the combination of lining crack seepage and frost heaving.

[0040] As a preferred embodiment, the first section 310 comprises a first sub-section 311 and a second sub-section 312, the first sub-section 311 extends into the lining crack 50, the second sub-section 312 is arranged on the secondary lining 40 of the arch wall, the water inlet of the second sub-section 312 and the water outlet of the first sub-section 311 are communicated, and the water outlet of the second sub-section 312 and the second section 320 are communicated.

[0041] Specifically, for the lining with existing cracks and water seepage, the drain pipe 30 can be pre-buried at the lining crack 50, and then extended along the lining to the cable trench or drainage trench on both sides, and the pre-buried drain pipe 30 is wrapped with foamed concrete, which can avoid the formation of ice layer on the lining surface in winter; after the drain pipe 30 passes through the foamed concrete insulation layer 20, the second section 320 preferably adopts a drain pipe 30 with insulation function to avoid freezing and blockage of the drain pipe 30.

[0042] Preferably, the first section 310 is a PVC pipe, and the second section 320 adopts an insulation material.

[0043] The PVC pipe has the characteristics of corrosion resistance, lightness, easy cutting and easy installation, which can significantly reduce the construction difficulty and cost. The second section 320 adopts an insulation material, such as one or more of a PVC insulation drain pipe 30, a polyurethane insulation drain pipe 30, and a mine polyurethane foaming insulation pipe, to avoid freezing and blockage of the drain pipe 30.

[0044] Further, the first end 110 is lap-jointed at the tunnel arch foot through a first L-shaped steel plate 160, the second end 120 is lap-jointed at the tunnel arch foot through a second L-shaped steel plate (not shown in the figure), the first L-shaped steel plate 160 and the second L-shaped steel plate are oppositely arranged on both sides of the tunnel, and the first L-shaped steel plate 160 and the second L-shaped steel plate are both arranged along the extension direction of the tunnel.

[0045] Specifically, the first L-shaped steel plate 160 and the second L-shaped steel plate are respectively lap-jointed at the arch feet on both sides of the tunnel, which can effectively disperse the load from the inside and outside of the tunnel to the tunnel structure, thereby improving the stability of the entire structure.

[0046] Further, the first end 110 and the first L-shaped steel plate 160 are connected by bolts, and the second end 120 and the second L-shaped steel plate are connected by bolts.

[0047] As a preferred example, the thickness of the insulation layer 20 is set to be between 4mm and 6mm.

[0048] As a preferred example, the length of the corrugated steel plate body 131 is set to be 1m.

[0049] As a preferred example, the circumferential length of the first corrugated steel plate 130 and the third corrugated steel plate 150 is set to 8 m. It can be understood that a person skilled in the art can also set the length of the corrugated steel plate body 131, the circumferential length of the first corrugated steel plate 130 and the third corrugated steel plate 150 to other values according to actual needs.

[0050] The above are only preferred embodiments of the present application, and do not limit the patent range of the present application, and any equivalent structure or equivalent process transformation made by using the content of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A freeze-proof structure suitable for a tunnel in a high-cold region, characterized in that, The steel plate assembly is arranged in the inner side of the secondary lining of the arch wall, a space is formed between the steel plate assembly and the secondary lining of the arch wall, the steel plate assembly is provided with a grouting hole communicating with the space, and the space is filled with foamed concrete through the grouting hole to form a thermal insulation layer, the steel plate assembly comprises a first end and a second end opposite in the circumferential direction of the tunnel, and the first end and the second end are overlapped at the corresponding arch spring of the tunnel. Further comprising a drain pipe, the drain pipe comprises a first section embedded in the thermal insulation layer and a second section arranged outside the thermal insulation layer, the water inlet of the first section corresponds to the lining crack to collect water seepage of the lining crack, the first section extends downward along the circumferential direction of the tunnel and communicates with the second section, and the second section communicates with the existing tunnel drainage system; wherein the second section is a drain pipe with thermal insulation function.

2. The anti-freezing structure for a tunnel in a high-cold region according to claim 1, characterized in that, The steel plate assembly comprises a first corrugated steel plate, a second corrugated steel plate and a third corrugated steel plate connected in sequence in the circumferential direction of the tunnel, one end of the first corrugated steel plate away from the second corrugated steel plate is overlapped at the arch spring of the tunnel, one end of the third corrugated steel plate away from the second corrugated steel plate is overlapped at the arch spring of the tunnel, one end of the second corrugated steel plate is overlapped with the first corrugated steel plate, and the other end of the second corrugated steel plate is overlapped with the third corrugated steel plate.

3. The anti-freezing structure for a tunnel in a high-cold region according to claim 2, characterized in that, The first corrugated steel plate comprises first corrugated steel plate units connected in sequence in the extension direction of the tunnel, each first corrugated steel plate unit comprises a corrugated steel plate body and first and second connecting plates connected to both ends of the corrugated steel plate body respectively, the first connecting plate is provided with a first connecting hole for a bolt to pass through, the second connecting plate is provided with a second connecting hole for a bolt to connect, and the i-th first corrugated steel plate unit is connected with the i+1-th first corrugated steel plate unit by the bolt passing through the second connecting hole of the second connecting plate of the i-th first corrugated steel plate unit and the first connecting hole of the first connecting plate of the i+1-th first corrugated steel plate unit; wherein i is a positive integer and i≥1.

4. The anti-freezing structure for a tunnel in a high-cold region according to claim 3, characterized in that, The length of the corrugated steel plate body is 1m.

5. The anti-freezing structure for a tunnel in a high-cold region according to claim 2, characterized in that, The circumferential length of the first corrugated steel plate and the third corrugated steel plate is 8m.

6. The anti-freezing structure for a tunnel in a high-cold region according to claim 1, wherein, The first section comprises a first sub-section and a second sub-section, the first sub-section extends into the lining crack, and the second sub-section is arranged on the secondary lining of the arch wall, the water inlet of the second sub-section communicates with the water outlet of the first sub-section, and the water outlet of the second sub-section communicates with the second section.

7. The anti-freezing structure for a tunnel in a high-cold region according to claim 1, characterized in that, The first section is a PVC pipe, and the second section is made of thermal insulation material.

8. The anti-freezing structure for a tunnel in a high-cold region according to claim 1, characterized in that, The first end is overlapped at the arch spring of the tunnel by a first L-shaped steel plate, the second end is overlapped at the arch spring of the tunnel by a second L-shaped steel plate, the first L-shaped steel plate and the second L-shaped steel plate are oppositely arranged on both sides of the tunnel, and the first L-shaped steel plate and the second L-shaped steel plate extend along the extension direction of the tunnel.

9. The anti-freezing structure for a tunnel in a high-cold region according to claim 1, wherein, The thickness of the thermal insulation layer is between 4mm and 6mm.

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