CN103410563A - Cold-proof draining tunnel - Google Patents

Abstract

Translated fromChinese

本发明提供一种防寒泄水洞，铺设于寒区隧道的冻土段下方，防寒泄水洞内铺设有引水管道，引水管道与非冻土段下方的排水沟连通，引水管道的断面面积远小于防寒泄水洞的断面面积，引水管道的外壁和防寒泄水洞的内壁均覆设有保温层；防寒泄水洞的出口为倾斜式出水口或掩埋式出水口，出口处封闭，仅引出引水管道。防寒泄水洞通过检查井与寒区隧道连通，检查井入口处设有可启闭的井盖。在穿越多年冻土段的防寒泄水洞不需要泄水功能的前提下，引水管道和保温层可有效防止水流冻结，封闭的出口延缓了洞内的降温速率，寒季前开启检查井入口处的井盖，可引入洞外暖空气，为寒季留下热量储备，保证水流能畅通地穿越寒区隧道的多年冻土段。

The invention provides a cold-proof drainage tunnel, which is laid under the frozen soil section of the tunnel in the cold region. A water diversion pipe is laid in the cold-proof drainage tunnel. The water diversion pipe communicates with the drainage ditch below the non-frozen soil section. Smaller than the cross-sectional area of the cold-proof drainage tunnel, the outer wall of the water diversion pipe and the inner wall of the cold-proof drainage tunnel are covered with an insulating layer; the outlet of the cold-proof drainage tunnel is an inclined water outlet or a buried water outlet, and the outlet is closed. water pipes. The cold-proof drainage tunnel is connected with the tunnel in the cold area through the inspection well, and a manhole cover that can be opened and closed is provided at the entrance of the inspection well. On the premise that the cold-proof drainage tunnel passing through the permafrost section does not need drainage function, the water diversion pipe and insulation layer can effectively prevent the water flow from freezing, and the closed outlet delays the cooling rate in the tunnel. Open the entrance of the inspection well before the cold season The manhole cover can introduce warm air outside the tunnel, leaving a heat reserve for the cold season, and ensuring that the water flow can pass through the permafrost section of the tunnel in the cold region smoothly.

Description

The winter protection drain cavern

Technical field

The present invention relates to a kind of tunnel drainage system, particularly relating to a kind of is the winter protection drain cavern that passes through the tunnel in cold area diversion of ever-frozen ground section.

Background technology

China's permafrost region distributes very extensive, and wherein ever-frozen ground mainly is distributed in northeast Xing'anling mountains and song-Nen plain the north and western high mountain and Qinghai-Tibet Platean, and sporadicly is distributed in some the high Mountain areas in Frozen Area.China's Permafrost Area area has 2,150,000 sq-kms, accounts for 22.4% of territory total area.In strategy to develop western regions, building up western traffic system easily is the inevitable link of Western Economic and social progress.Along with the rise of China in Qinghai-Tibet Plateau Railway, highway construction, the anti-antifreeze problem of Layers In Cold-area Tunnels is subject to concern and the attention of engineering circles day by day.

The freeze injury form of tunnel in cold area is that ice is leaked, hangs in tunnel lining, tunnel lining cracking, crisp broken, peel off, tunnel bottom emits water, accumulated ice, freezing up.Above-mentioned freeze injury shows, water is the root that produces the tunnel in cold area freeze injury, and in order to prevent the generation of freeze injury, at first tunnel in cold area must take to prevent efficiently drainage measure.The winter protection drain cavern is when the coldest month, temperature on average was lower than-25 ℃, a kind of drainage measure of specification recommends in tunnel in cold area, but also exist drawback.Common winter protection drain cavern can not thoroughly be avoided the generation of freeze injury, in existing engineering, has failed case, and the ice berg phenomenon also once appearred in the drain cavern that passes through the ever-frozen ground section.When drain cavern passes through the ever-frozen ground section, be only a diversion tunnel, without the need for the sluicing function.Because ever-frozen ground section country rock is in subzero temperature, in the situation that it is less to cross streamflow, current very easily freeze, and can't flow, and cause drainage system to lose efficacy.Drainage system is in case inefficacy namely there will be the phenomenons such as aforesaid ice berg.Therefore the drain cavern that passes through the frozen soil section need take effective measures to guarantee that the current in drain cavern are unimpeded and not frozen, prevents that drainage system lost efficacy.

In order to prevent freezing of current in drain cavern, conventional way is between supporting in the early stage and secondary lining or the secondary lining inner surface is laid insulation layer.The method can play the effect that current freeze that delays, but because drain cavern environment of living in is subzero temperature, and the drain cavern section is large and the water yield is relatively less, therefore the simple trend that relies on insulation layer not to stop the interior current of drain cavern to freeze.In general, in drain cavern, temperature can be down to below 0 ℃ in 2～3 years, and current in hole are freezed, and therefore drainage system lost efficacy.

Summary of the invention

The shortcoming of prior art in view of the above, the technical problem to be solved in the present invention is to provide a kind of winter protection drain cavern, under prerequisite for the function that do not need to sluice at drain cavern, can guarantee that the current in drain cavern are not frozen, unimpededly pass through tunnel in cold area ever-frozen ground section.

Reach for achieving the above object other relevant purposes, the invention provides a kind of winter protection drain cavern, be layed in the frozen soil section below of tunnel in cold area, in described winter protection drain cavern, be equipped with conduit pipe, described conduit pipe is communicated with the gutter of non-frozen soil section below, the cross-sectional area of described conduit pipe is much smaller than the cross-sectional area of described winter protection drain cavern, and the inwall of the outer wall of described conduit pipe and described winter protection drain cavern all is covered with insulation layer; The exit sealing of described winter protection drain cavern, only draw described conduit pipe; Described winter protection drain cavern is communicated with described tunnel in cold area by manhole, and described manhole entrance is provided with able to turn on or off well lid.

Preferably, the paving location of described winter protection drain cavern is lower than the position in described gutter.

Preferably, between described conduit pipe and described gutter, be connected by aqueduct.

Preferably, the cross-sectional area of described conduit pipe is slightly larger than the cross-sectional area in described gutter.

Preferably, when the outlet of described winter protection drain cavern was the tilting delivery port, the exit of described winter protection drain cavern was provided with occluding body.

Preferably, the outlet of described winter protection drain cavern is the buried type delivery port.

Preferably, Deeply buried ditch or heat preservation ditch centered by described gutter.

Preferably, described conduit pipe is the precast concrete conduit pipe.

As mentioned above, winter protection drain cavern provided by the invention, has following beneficial effect: under the winter protection drain cavern that passes through the ever-frozen ground section does not need to sluice the prerequisite of function, in the winter protection drain cavern, laid conduit pipe, the underground water extracted will the drainage pipe in non-frozen soil section focuses in conduit pipe, due to the conduit pipe cross-sectional area much smaller than winter protection drain cavern cross-sectional area, add the insulation layer of outer ring, the heat of current itself is difficult for scattering and disappearing, and can effectively prevent freezing of the interior current of conduit pipe.The exit sealing of winter protection drain cavern, only draw conduit pipe, reduced cold air outside hole and entered in hole, delayed the rate of temperature fall in the hole.By the manhole entrance, introduce warm air outside hole, temperature in hole is raise, for staying the heat deposit dead season, prevent that further in the winter protection drain cavern, current freeze.Therefore winter protection drain cavern heat insulation effect provided by the invention is remarkable, and cost is low, implementation method is simple.

The accompanying drawing explanation

Fig. 1 is shown as the schematic diagram of winter protection drain cavern of the present invention.

Fig. 2 is shown as winter protection drain cavern in Fig. 1 along the sectional drawing of A-A line.

Fig. 3 is shown as winter protection drain cavern in Fig. 1 along the sectional drawing of B-B line.

The schematic diagram when outlet that Fig. 4 is shown as winter protection drain cavern of the present invention is the buried type delivery port.

Fig. 5 is shown as winter protection drain cavern in Fig. 1 along the sectional drawing of C-C line.

The specific embodiment

Below by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this manual.The present invention can also be implemented or be applied by the other different specific embodiment, and the every details in this manual also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.

Refer to Fig. 1 to Fig. 5.It should be noted that, the diagram provided in the present embodiment only illustrates basic conception of the present invention in a schematic way, though in graphic, only show with the present invention in relevant assembly but not component count, shape and size drafting while implementing according to reality, during its actual enforcement, kenel, quantity and the ratio of each assembly can be a kind of random change, and its assembly layout kenel also may be more complicated.

Fig. 1 is shown as the schematic diagram of winter protection drain cavern of the present invention, and tunnel incold area 2 passes through frozen soil section and non-frozensoil section 7, and the frozen soil section is divided into again ever-frozenground section 6 and seasonal frozen ground section 8.Winter protection drain cavern 1 is got rid of the major measure of underground water as tunnel, be similar to little tunnel, be positioned at tunnel incold area 2 under, from the hole of tunnel incold area 2, be routed to the intersection of ever-frozenground section 6 andnon-frozen soil section 7 always.When winter protection drain cavern 1 passes through ever-frozenground section 6, only play the diversion effect, without the need for the sluicing function.For preventing that the current in winter protection drain cavern 1 from freezing to cause drainage system to lose efficacy, in the winter protection drain cavern 1 that the present invention proposes, be equipped withconduit pipe 9, thisconduit pipe 9 is communicated with thegutter 3 that is layed innon-frozen soil section 7 belows, to focus inconduit pipe 9 from the underground water extractednon-frozen soil section 7, rather than appoint current cross flow in hole as traditional winter protection drain cavern.The cross-sectional area ofconduit pipe 9, much smaller than the cross-sectional area of winter protection drain cavern 1, has greatly reduced scattering and disappearing of current heats by reducing the cross-section of river.Deeply buried ditch or heat preservation ditch centered by thegutter 3 of non-frozensoil section 7 belows.The center Deeply buried ditch is that ditch is embedded under the interior corresponding depth of frost penetration of tunnel incold area 2, utilizes the constant temperature of underground water to reach the freeze thawing balance, guarantees that current are not frozen.Heat preservation ditch adopts shallow embedding mode (namely being shallower than the maximum frozen depth in tunnel in cold area 2), in heat preservation ditch, adopts Insulation, to reach the uncongealable purpose of current.The paving location of winter protection drain cavern 1 is lower than the burial place in gutter 3.Betweenconduit pipe 9 andgutter 3, be connected byaqueduct 5,conduit pipe 9 cross-sections of river are slightly larger than the cross-section of river in gutter 3.In embodiment, thisconduit pipe 9 adopts the precast concrete conduit pipe to shorten the engineering time.In reality, can adopt as the case may be the conduit pipe of other materials.

Fig. 2 is shown as winter protection drain cavern in Fig. 1 along the sectional drawing of A-A line, and namely the winter protection drain cavern is at the sectional drawing of common section.As shown in the figure,conduit pipe 9 outer walls all are coated withinsulation layer 10, to stop the current heat to the pipeline external diffusion.The inwall of winter protection drain cavern 1 also is equipped withinsulation layer 10, plays the effect of the interior heat of winter protection drain cavern 1 to 6 diffusions of ever-frozen ground section that delay.

Treatment measures should be taked to seal accordingly in the exit of winter protection drain cavern 1, to prevent that outside hole, cold air enters, delay rate of temperature fall in hole.The outlet of winter protection drain cavern 1 can be adopted buried type heat-insulating water outlet or tilting delivery port.Fig. 3 is shown as in Fig. 1 along the sectional drawing of B-B line, namely has the sectional drawing of the winter protection drain cavern 1 of tilting delivery port in exit.Winter protection drain cavern 1 with tilting delivery port is provided with occludingbody 11 in nearly exit, only draws conduit pipe 9.Fig. 4 is shown as the schematic diagram of the winter protection drain cavern of buried type delivery port, and the buried type delivery port itself is sealing.

Fig. 5 is shown as winter protection drain cavern in Fig. 1 along the sectional drawing of C-C line, and as shown in the figure, winter protection drain cavern 1 is communicated with tunnel incold area 2 by manhole 4, and theentrance 41 of manhole 4 is provided with able to turn on or off well lid.Before arriving dead season, the well lid ofentrance 41 is opened, and the warm air outside hole is introduced in hole, for staying the heat deposit dead season.When arrived dead season, well lid was closed, and prevented that the cold air in tunnel incold area 2 from entering winter protection drain cavern 1.

In sum, the present invention has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.

Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not be used to limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and know that usually the knowledgeable, not breaking away from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.

Claims (8)

Translated fromChinese

1.一种防寒泄水洞，铺设于寒区隧道的冻土段下方，其特征在于：所述防寒泄水洞（1）内铺设有引水管道（9），所述引水管道（9）与非冻土段（7）下方的排水沟（3）连通，所述引水管道（9）的断面面积远小于所述防寒泄水洞（1）的断面面积，所述引水管道（9）的外壁和所述防寒泄水洞（1）的内壁均覆设有保温层（10）；所述防寒泄水洞（1）的出口处封闭，仅引出所述引水管道（9）；所述防寒泄水洞（1）通过检查井（4）与所述寒区隧道（2）连通，所述检查井（4）入口处（41）设有可启闭的井盖。1. A cold-proof drainage tunnel, which is laid under the permafrost section of a tunnel in a cold region, characterized in that: a water diversion pipe (9) is laid in the cold-proof drainage tunnel (1), and the water diversion pipe (9) and The drainage ditch (3) below the non-frozen soil section (7) is connected, the cross-sectional area of the water diversion pipe (9) is much smaller than the cross-sectional area of the cold-proof drainage hole (1), and the outer wall of the water diversion pipe (9) and the inner wall of the cold-proof drain hole (1) are covered with an insulating layer (10); the outlet of the cold-proof drain hole (1) is closed, and only the water diversion pipe (9) is led out; the cold-proof drain The water tunnel (1) communicates with the cold area tunnel (2) through the inspection well (4), and the entrance (41) of the inspection well (4) is provided with a manhole cover that can be opened and closed.2.根据权利要求1所述的防寒泄水洞，其特征在于：所述防寒泄水洞（1）的铺设位置低于所述排水沟（3）的位置。2. The cold-proof drainage tunnel according to claim 1, characterized in that: the laying position of the cold-proof drainage tunnel (1) is lower than the position of the drainage ditch (3).3.根据权利要求2所述的防寒泄水洞，其特征在于：所述引水管道（9）与所述排水沟（3）之间通过导水管（5）连接。3. The cold-proof drainage tunnel according to claim 2, characterized in that: the water diversion pipe (9) is connected to the drainage ditch (3) through a water guide pipe (5).4.根据权利要求3所述的防寒泄水洞，其特征在于：所述引水管道（9）的断面面积略大于所述排水沟（3）的断面面积。4. The cold-proof drainage tunnel according to claim 3, characterized in that: the cross-sectional area of the water diversion pipe (9) is slightly larger than the cross-sectional area of the drainage ditch (3).5.根据权利要求1所述的防寒泄水洞，其特征在于：所述防寒泄水洞（1）的出口为倾斜式出水口时，所述防寒泄水洞（1）的出口处设有封堵体（11）。5. The cold-proof drainage tunnel according to claim 1, characterized in that: when the outlet of the cold-proof drainage tunnel (1) is an inclined water outlet, the outlet of the cold-proof drainage tunnel (1) is provided with Blocking body (11).6.根据权利要求1所述的防寒泄水洞，其特征在于：所述防寒泄水洞（1）的出口为掩埋式出水口。6. The cold-proof drainage tunnel according to claim 1, characterized in that: the outlet of the cold-proof drainage tunnel (1) is a buried water outlet.7.根据权利要求1所述的防寒泄水洞，其特征在于：所述排水沟（3）为中心深埋水沟或保温水沟。7. The cold-proof drainage tunnel according to claim 1, characterized in that: the drainage ditch (3) is a centrally buried ditch or a thermal insulation ditch.8.根据权利要求1至7中任一项所述的防寒泄水洞，其特征在于：所述引水管道（9）为预制混凝土引水管道。8. The cold-proof drainage tunnel according to any one of claims 1 to 7, characterized in that: the water diversion pipe (9) is a prefabricated concrete water diversion pipe.

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