CN206204973U - Subway station water stop structure for protecting groundwater environment - Google Patents
Subway station water stop structure for protecting groundwater environment Download PDFInfo
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- CN206204973U CN206204973U CN201620588959.6U CN201620588959U CN206204973U CN 206204973 U CN206204973 U CN 206204973U CN 201620588959 U CN201620588959 U CN 201620588959U CN 206204973 U CN206204973 U CN 206204973U
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Abstract
The utility model relates to an electric railway technique particularly, relates to a subway station stagnant water structure for protecting groundwater environment. This stagnant water structure includes: the device comprises a V-shaped frozen soil water stop layer, wherein two vertical frozen soil walls are arranged in a space enclosed by the V-shaped frozen soil water stop layer; the vertical frozen soil wall is communicated with the V-shaped frozen soil water stop layer. The utility model has a V-shaped frozen soil waterproof layer to prevent external underground water from entering into a station foundation pit; the vertical frozen soil wall is used for supporting the stability of soil bodies on two sides of a station foundation pit, protecting the groundwater environment and avoiding polluting the groundwater quality in the construction process. By adopting the freezing water-stopping structure, large-scale drainage construction is avoided, precious underground water resources are saved, and meanwhile, the sedimentation deformation of surrounding adjacent buildings and structures caused by drainage construction is avoided.
Description
Technical field
The utility model is related to electric railway technology, in particular to the subway for protecting groundwater environment
Stand water sealing structure.
Background technology
For the subway construction of region of FuShui, when subway tunnel uses shallow mining method, using sealing or drainage position
Underground water in the range of reason tunnel excavation is the element task before tunnel excavation.At present, China's subway tunnel sealing is typically used
Ejection for water plugging or rotary churning pile water stopping, both sealing modes are required for injecting cement grout, polluted underground water water in soil layer
Matter, while cement grout flow direction is whard to control, the seepage channel of easy blocking underground water changes the percolation path of underground water.And
Using drainaging scheme, valuable groundwater resources will be wasted, while the level of ground water reduction that draining causes easily causes periphery neighbouring
Build, the sedimentation and deformation of structures.
With urbanization progress and economic development, subway will turn into one of Main Means of solution urban transport problems.But
It is that, because geological conditions difference is larger, can often trigger surface subsidence, karst collapse, wall rock destabilization etc. all kinds of during subway construction
The problems of geo-environment, can also trigger all kinds of water environmental problems such as tunnel gushing water, water level decreasing, water pollution.
To avoid the influence of all kinds of engineering problems or reduction subway engineering that trigger in Metro Construction to surrounding enviroment,
Domestic and foreign scholars have carried out substantial amounts of research to correlative protection governing measure and method.Albert Weiler (1983) are based on moral
Will Duisburg Quaternary Strata condition, sums up subway construction method-space concretion method.Sun Yazhe (2003) is for Nanjing
Traffic tunnel construction is there may be the problems of geo-environment such as water pollution, surface subsidence, surface collapse, tunnel gushing waters under the XuanWu Lake,
To reduce the influence to groundwater environment, it is proposed that limitation cutting depth and protection natural sludge layer, using banketing for good water permeability
Material, pollution small construction material, chemical grout, large area artificial rainmaking is avoided using freezing sealing construction scheme.Set a prairie fire side
(2004) influence for karst to Guangzhou Metro Construction, proposition carries out karst water segregation using freezing and High-Pressure Grouting Method,
To solution cavity using grouting and pattern handling.Xing Wei river bend (2004) analyze Metro Construction may be to the influence of water quality, it is proposed that
Using the construction material and chemical grout that pollution is small in engineering construction, the change for analyzing groundwater flow condition can also be caused
Engineering stability be deteriorated trigger differential settlement, it is proposed that optimization each construction parameter of shield, and using corresponding engineering method such as every
Disconnected, soil stabilization, structure trunk are reinforced and foundation underpinning etc. is to reduce the influence to surrounding environment.C.O.Aksoy(2008)
The surface subsidence problem that Turkey's Izmir subway station engineering dewatering triggers is analyzed, country rock is maintained by chemical grouting means
Stability, effectively prevents surface subsidence and level of ground water is recovered to previous level.Li Guangtao (2009) is for Guangzhou ground
Molten, soil cave unfavorable geological condition present in No. three line engineering constructions of iron is processed, and clearly proposes the rock of shield and open cut
Molten treatment measures.R.Galler (2009) proposes the new Austrian method for tunnel construction (NATM) of a set of economic security, the party
Method was developed rapidly in recent years in Australia.Fu Zhifeng (2010) is for possible in No. 2 line engineering constructions of Wuhan subway
The geotechnical engineering problems such as quaternary formation, Karst Geological Landscape, the underground water of appearance, it is proposed that engineering dewatering design, diaphram wall,
The precautionary measures such as slip casting closure waterproofing work.Long Yankui (2012) analyzes influence of the karst to subway engineering, emphatically to karst
The influence factor of cave stability is explored, and proposes digging up and filling in, slip casing by pressure, the karst cave of works leap
Treatment measures.It is therefore seen that treatment research of many emphasis in the past to some the problems of geo-environment, and prevent for engineering should be carried out
Shield treatment takes into account spring water again and the research of water quality protection is also more rare at present.
Utility model content
The purpose of this utility model be provide a kind of subway station water sealing structure for protecting groundwater environment and its
Construction method, to solve in tunnel work progress to Groundwater Pollution, protects the problem of groundwater resources.
The utility model embodiment provides a kind of subway station water sealing structure for protecting groundwater environment, its bag
Include：The frozen soil sealing layer of V-arrangement, two stifled vertical frozen soil walls are set in the space that surrounds of frozen soil sealing layer of the V-arrangement；It is described vertical
Frozen soil wall is connected with the frozen soil sealing layer of the V-arrangement.
In certain embodiments, preferably, the midline position of subway station is crossed in the bottom of the frozen soil sealing layer of the V-arrangement.
In certain embodiments, preferably, the thickness of the frozen soil sealing layer of the V-arrangement is 0.5m~2.0m.
In certain embodiments, preferably, the thickness of the vertical frozen soil wall is 0.5m~3.0m.
In certain embodiments, preferably, inside, the inside of the vertical frozen soil wall of the frozen soil sealing layer of the V-arrangement
It is respectively provided with and freezing pipe is set in multiple freezing holes, the freezing hole.
In certain embodiments, preferably, a diameter of 50mm~200mm of the freezing hole, described to freeze pitch of holes 500
~1000mm.
In certain embodiments, preferably, the V-arrangement frozen soil sealing layer and the vertical frozen soil wall mean temperature not
Higher than -10 DEG C.
In certain embodiments, preferably, the foundation ditch both sides ground laying heat-insulation layer of the subway station, the foundation ditch
Inner surface sprays thermal insulation concrete.
In certain embodiments, preferably, the heat-insulation layer includes：Eps foam plate, polystyrene, extruded sheet, polyurethane
Any one warming plate in plate；And/or, the thermal insulation concrete layer includes：Air entrained concrete, 0.5%~2% efficient rapid hardening
Agent, 0.5%~2% latex powder and 3%~7% fiber.
The subway station water sealing structure for protecting groundwater environment that the utility model embodiment is provided, with prior art
Compare, the frozen soil sealing layer of V-arrangement, to prevent from externally descending water to enter in station pit；Vertical frozen soil wall is used to support station base
Cheat the stabilization of soil at both sides.
Brief description of the drawings
Fig. 1 be the utility model one embodiment in for protect groundwater environment subway station water sealing structure it is cross-sectional
Face schematic diagram；
Fig. 2 is the schematic diagram for freezing refrigeration system in the utility model one embodiment in water sealing structure.
Note：1 oblique freezing pipe；The frozen soil sealing layer of 2V shapes；3 vertical freezing pipes；4 vertical frozen soil walls；5 ground insulatings layer；6
Thermal insulation concrete；7 subway stations；8 clarified water pumps；9 freezing units；10 starting cabinets；11 brine tanks；12 brine pumps；13 freezing pipes；14
Cooling tower.
Specific embodiment
The utility model is described in further detail below by specific embodiment combination accompanying drawing.
It is Source of life in view of water, is also the precious resources that city is depended on for existence and development, China has more than half
City there are problems that lacking, therefore, the groundwater resources that preciousness how is protected during metro construction are engineering technology
This city well-known with spring of the key technical problem that personnel intend to solve, such as Jinan, protects the water quality and water of spring,
Matter of utmost importance even more in subway construction.The technical problem that the utility model is intended to solve is region of FuShui subway tunnel process of construction
In how to protect underground water, realized in the case of not precipitation subway tunnel safely and fast efficiently excavate.Therefore clearly require
The technical problem of solution is:
(1) pollution problem during solution constructing metro tunnel to quality of groundwater；
(2) protection during solution constructing metro tunnel to underground water water resource, avoids reducing groundwater level, avoids
Change seepage action of ground water path, protect spring.
For this provides the subway station water sealing structure for protecting groundwater environment, it includes：The frozen soil sealing of V-arrangement
Layer, two stifled vertical frozen soil walls are set in the space that surrounds of frozen soil sealing layer of the V-arrangement；The vertical frozen soil wall and the V-arrangement
Frozen soil sealing layer be connected.
The frozen soil sealing layer of V-arrangement, to prevent from externally descending water to enter in station pit；Vertical frozen soil wall is used to support station
The stabilization of foundation ditch soil at both sides.
Next, being described in detail to the technology：
A kind of subway station water sealing structure for protecting groundwater environment, as shown in figure 1, it includes：The frozen soil of V-arrangement stops
Water layer, two stifled vertical frozen soil walls are set in the space that surrounds of frozen soil sealing layer 2 of the V-arrangement；The vertical frozen soil wall and the V
The frozen soil sealing layer 2 of shape is connected.The inside of the frozen soil sealing layer 2 of V-arrangement, the inside of the vertical frozen soil wall are respectively provided with multiple jellies
Knot hole, sets freezing pipe in the freezing hole.Oblique freezing pipe 1 and vertical freezing pipe 3, two are set in the both sides of subway station 7
The oblique freezing pipe 1 of side is collectively forming a frozen soil sealing layer 2 for V-arrangement, to prevent from externally descending water to enter in station pit；It is perpendicular
It is used to form a vertical frozen soil wall to freezing pipe 3, supports the stabilization of station pit soil at both sides.
The midline position of subway station 7 is crossed in the bottom of the frozen soil sealing layer 2 of the V-arrangement；The angle of inclination of oblique freezing pipe 1
Determine that the length of freezing pipe need to reach station midline position according to station both sides construction site and station pit cutting depth, with
Opposite side freezing pipe is connected, and forms the V-arrangement frozen soil layer of closing.
The thickness of the frozen soil sealing layer 2 of the V-arrangement is 0.5m~2.0m.Freeze bore dia and intend selection 50mm~200mm, freeze
500~1000mm of knot pitch of holes.
The length of vertical freezing pipe 3 determines according to station pit cutting depth, and is connected with the oblique freezing pipe 1 of homonymy, shape
Into a y shape frozen soil layer, be conducive to the stabilization of waterproof and soil at both sides.The thickness of vertical frozen soil sealing layer is according to excavation of foundation pit depth
The parameter determination such as degree, foundation ditch both sides Water And Earth Pressures, ground load, need to meet the requirement of soil at both sides stability, and its thickness is intended to be
1.0m~3.0m scopes.Freeze bore dia and intend selection 50mm~200mm, freeze 500~1000mm of pitch of holes.The vertical frozen soil
The thickness of wall 4 is 0.5m~3.0m.
The mean temperature of effective V layers of frozen soil sealing layer and vertical frozen soil wall 4 is not higher than -10 DEG C, frozen soil sealing during excavation
Layer surface temperature is less than -3 DEG C.
In order to reduce energy resource consumption, the heat insulation effect of refrigeration system is improved, heat-insulation layer, foundation ditch are laid on foundation ditch both sides ground
Thermal insulation concrete 6 is sprayed on foundation ditch surface in digging process, heat-insulation system is collectively formed.Ground insulating layer 5 can select eps foam
The heat preservation plate materials such as plate, polystyrene, extruded sheet, polyurethane sheet.The injection thermal insulation concrete 6 of foundation ditch both sides and bottom of foundation ditch is with base
Hole is excavated and is successively sprayed, and jet thickness is intended to be 10~30cm.Thermal insulation concrete 6 is also called air entrained concrete, foam concrete, hair
Bubble concrete, belongs to the category of heat preserving and insulating material, can prevent or reduce and extraneous generation heat exchange, the tool that reduction heat dissipates
There is the special concrete of certain Physical and mechanical properties.
Thermal insulation concrete 6, in order to reduce the mobility of foam concrete, improves viscosity and attachment using the construction of wet shot method
Power, increases by 0.5%~2% efficient accelerators of BASF, 0.5%~2% ternary latex powder and 3% in foam concrete
~7% fiber.
The construction method of above-mentioned bored tunnel water sealing structure is provided below, specifically includes：
Step 101, freezing pipe drilling preparation；
Part I：Freezing pipe, temperature tube, relief tube and feed pipe specification
Freezing pipe can select ф 108 × 8mm low-carbon (LC) seamless steel pipes, and single pipe length is 1.5~2m, using threaded connection
And repair welding by hand, temperature tube and the same freezing pipe of hydrology pipe tubing.62 × 6mm of feed pipe ф can select enhancing vinyl tube or
15# steel pipes.
Part II：Drill lectotype selection
Can select 2, MKG-5S types rig.2, BW-250/50 slush pumps are can select, flow is 250l/min.Rig and
Slush pump general power is 41kw.
Special combination drilling tool pipe-following drilling can be crept into using freezing hole.Drillhole inclination survey can be using special TY-1 types in high precision
Horizontal drilling gyrolevel, drilling superficial part is calibrated with theodolite Inclination Measurement by Light.
Part III：Freezing hole quality requirement
According to construction reference point, freezing hole is arranged by freezing hole construction figure.Hole position deviation not should be greater than 100mm.Freezing hole
Aperture can select 110mm.Freezing hole drilling depth error is -0.2~+0.3m.Hole deviation is controlled within 0.8 ‰.
Part IV：Drilling machine platform is built
Drilling machine platform is built using full hall scaffold pipe, and scaffold tube interplanar spacing is 0.6m × 0.6m.Platform completely spreads
60mm thickness deal boards, the borer chassis underlay 200mm × 200mm lumps of wood.According to hole site is freezed, drilling machine platform is increased in layering.
Step 102：By design orientation and angle excursion, the drilling for carrying out freezing hole and thermometer hole in a like fashion is adopted；
Enter freezing pipe under wherein in the freezing hole, in the freezing pipe under enter feed pipe；
The step is specifically included：
Step 102-1, freezing hole perforate
Freezing hole can use Φ 160mm diamond core drill perforates.Each drilling mounting hole pipe, orifice tube can use ф 159
× 8mm seamless steel pipes are processed.During drilling, orifice tube mounting hole sealing device.
Step 102-2, freezing hole drilling is installed with frigo
1. rig is fixed by the requirement of freezing hole design orientation.Freezing pipe is put into drilling.To after projected depth under freezing pipe
Seal header joints.
2. in order to ensure borehole accuracy, perforate section drilling is crucial.When creeping into preceding 10~20m, drilling rod side is checked repeatedly
Can continue drilling to, adjustment rig position, and after detecting deflection no problem with theodolite or gyroscope.
3. enter under freezing pipe it is preceding in hole will first pipe arrangement, it is ensured that freezing pipe concentricity.Under after good freezing pipe, carried out with inclinometer
Deviational survey, then repetition measurement freeze hole depth.Freeze length of tube and tube head is freezed in the qualified rear sealing of deflection, and carry out suppressing leak test.
Between 0.7~1.0MPa, it is that pressure testing is qualified to stablize 30 minutes unchanged persons of pressure to freezing hole leak test Stress control.
4. after freezing pipe is installed, the gap of freezing pipe and orifice tube is sealed with loss circulation material.
5. in the freezing pipe under enter feed pipe.Feed pipe is connected with pipe collar, support feed pipe bottom welding 0.2m high.So
Install afterwards and go, loop goat's horn and freeze pipe end-cap.
Thermometric hole construction method is identical with freezing pipe.
Step 103, installation freeze refrigeration system, will freeze refrigeration system respectively with freezing pipe 13, thermometer hole, feed pipe phase
Even；
The installation diagram for freezing refrigeration system may be referred to accompanying drawing 2.Installation steps are specifically included：
Step 103-1, freezes refrigeration plant type selecting and circuit design
1. can select YSKF600 types 1 set of unit of freezing, YSKF300 types freeze each 2 sets of unit (wherein 1 set standby).Work as salt
At -30 DEG C, when cooling water temperature is 28 DEG C, the refrigerating capacity of Freezing Station is about 240000kcal/h to coolant-temperature gage, freezes the motor of unit 9
General power is 305kw.
2. 8Sh-13 (A) salt water circulating pump 2 (wherein 1 standby), flow 270m be can select3/ h, lift 36m, motor
Power 45kw；From IS200-150-250 cooling water circulating pumps 1, flow 400m3/ h, lift 20m, motor general power 37kw.
3. DBN3-200 types cooling tower 14,2, motor general power 11kw be can select.
4. brine tank 11, one, volume 6m are set3。
5. salt water conduit tube and collection liquid distribution pipe select ф 219 × 8mm seamless steel pipes, and salt water conduit tube length is 380m.Collect, match somebody with somebody
Liquid pipe is connected from 1.5 " high-pressure rubber pipes with goat's horn.
6. " welded tube installs thermometer to cooling water pipe on refrigerator water inlet pipe and water outlet pipe with 5.
7. pressure gauge, temperature sensor and control valve going, in the saline line of loop are installed.Exported in Brine Pipe and installed
Flowmeter.
8. two, valve is installed between brine distributing ring and frigo, so as to control freezing device brine flow.
9. the eminence in saline line installs vent valve.
10. salt solution and clear water pipeline it is pressure-resistant be respectively 0.7MPa and 0.3MPa.
(11) the cooling water amount of each Freezing Station is 30m3/ h, maximum total electricity consumption about 398kw.
Other：Refrigerator oil selects N40 refrigerator oils.Refrigerant selects R22 refrigerants.Refrigerant agent is molten using calcium chloride
Liquid is used as freeze cycle salt solution.Salt solution proportion is 1.265.
Step 103-2, Freezing Station Housing, Furniture, Furnishing And Equipment is installed
Station equipment mainly includes power distribution cabinet (i.e. starting cabinet 10), freezing unit 9, brine tank 11, brine pump 12, clarified water pump
8th, cooling tower 14 and clear water reserviors etc..Equipment is installed and carried out by the requirement of equipment operating manual.
Control valve is installed between water pump import and export, salt water conduit tube two ends, collection brine distributing ring and frigo.Enter in condenser
Point for measuring temperature is installed in outlet；Temperature and pressure measuring point is installed loop salt water conduit tube two ends are gone to；Installed in loop salt water conduit tube outlet
Electromagnetic flowmeter；Flow measurement loop is installed between each frigo and collection brine distributing ring；Liquid level is installed in brine tank and indicates report
Alert device.
In certain embodiments, Freezing Station assembled prefabricated house, 3.5 meters of clear height, wall and roof laying sound panel, clear water reserviors
With brick masonry, cement plaster, pond is high 0.7 meter.
Step 103-3, pipeline connection, insulation and test instrumentation are installed
Directly on the ground, flange is connected for salt solution and cooling water pipeline pipe support.Go, loop salt water conduit tube pipe support is consolidated
It is scheduled on the active well borehole wall.Thermometer, pressure gauge and flowmeter are installed and carried out by design.Saline line is used after leak test, cleaning
Polystyrene foam plastics is incubated, and insulation layer thickness is 50mm, and the outside of heat-insulation layer is wrapped up with plastic sheeting.
Freeze evaporator and cryogenic pipe 50mm thick flex foam insulation, brine tank and the salt water conduit tube of unit
It is incubated with 50mm thick polystyrol plastic foam plate.
Step 103-4, dissolving calcium chloride and unit fill fluorine oiling
About 1/4 clear water is first injected in brine tank, then turn on pump is circulated and is gradually added solid calcium chloride, until salt solution
Concentration reaches design requirement.Impurity is removed during dissolving calcium chloride.Salt solution in brine tank can not fill too full, in order to avoid be higher than salt
The freezing pipe salt solution of tank port overflows brine tank when flowing back.
Unit fills fluorine and refrigerator refuels and carried out according to the requirement of equipment operating manual.The inspection of refrigeration system is carried out first
Leakage and nitrogen are rinsed, and after system ne-leakage is ensured, then fill fluorine oiling.
Step 104, carries out freeze operation, builds V-arrangement frozen soil sealing layer, vertical frozen soil wall；
The step includes：
Step 104-1, freezing system test running is freezed with actively
Equipment is debugged and test running after installing.In test running, each state such as pressure, temperature is adjusted at any time
Parameter, makes unit be run under the conditions of about the technical parameter of technological procedure and design requirement.In freezing process, timing is detected
Brine temp, brine flow and frozen soil sealing layer spread scenarios, adjust freezing system operational factor if necessary.Freezing system is operated
Enter after normal and actively freeze.It is required that brine temp is down to less than -20 DEG C in one week.
Step 104-2, examination is dug and is freezed with maintenance
Determine that frozen soil sealing layer has handed over circle according to the observation of hydrology hole, and judge that frozen soil sealing layer reaches according to observed temperature
After design thickness, then more than 2m in the internal non-frozen soil of frozen soil sealing layer is squeezed into core drill, confirmed in frozen soil sealing layer without dynamic water.
It is then possible to subregion opens the active well borehole wall.After being excavated in soil layer, thickness, surface temperature and the change of frozen soil sealing layer are surveyed
Shape, has such as reached design requirement, then can enter normal construction, should otherwise stop driving, strengthens freezing, and analyzes reason, takes
Corresponding measure.
Enter after excavation of foundation pit and safeguard freezing period.In principle, brine temp and brine flow are freezed in the maintenance during excavation
With actively freeze identical, according to site-test analysis in such as constructing, prove that frozen soil sealing layer expansion rate is faster than what is be expected really, freeze
Native sealing layer has enough bearing capacity and stability, has met design requirement, can properly increase brine temp, but highest can not
Higher than -20 DEG C.After starting to do liner, in the case where outer lining safety is ensured, brine temp can be improved, or even stop freezing in advance
Knot.
Step 105, after the thickness and intensity of V-arrangement frozen soil sealing layer and vertical frozen soil wall reach preset requirement, freezes to apply
Work successively carries out excavation of foundation pit into after safeguarding freezing period；
When frozen soil layer effective thickness and intensity reach requirement, frozen construction enters safeguards after freezing period successively excavation pit,
During excavation, the soil layer not freezed from hand excavation first recycles pneumatic pick driving frozen soil.Note：Freezing curtain exposure temperature
Must not spend higher than -5 DEG C, and open-assembly time control is in 24h.
Step 106, builds tunnel lining structure.
The step is specifically included：
Step 106-1, sprays thermal insulation concrete
One layer of heat preservation concrete is sprayed after excavation of foundation pit in time, jet thickness is intended to be 10~30cm.Thermal insulation concrete is used
Wet shot method is constructed, and in order to reduce the mobility of foam concrete, improves viscosity and adhesive force, is increased in foam concrete
0.5%~2% efficient accelerators of BASF, 0.5%~2% ternary latex powder and 3%~7% fiber.
When excavation of foundation pit is to projected depth, one layer of heat preservation concrete is sprayed in bottom of foundation ditch, thickness is intended to be 10~30cm.
Step 106-2, pours tunnel lining structure
Tunnel-liner should ensure that lining thickness and lapped length of steel bar.Strict control measurement, prevents tunnel to owe to dig, and reinforcing bar is tied up
During bundle, special messenger is responsible for, and ring, the longitudinal reinforcement lap of splice are respectively 35~25 times of bar diameter.
To ensure that strength of lining is not less than the requirement of C30, concrete mix proportion experiment should be made before construction, be determined by testing
Optimum mix, and be strictly controlled by, make up to design requirement.
Using homemade simple steel formwork trolley construction, strict Control architecture appearance and size can not invade lining during formwork erection for lining cutting
Inner outline is built, and is outwards no more than 50mm, be responsible for by footman survey crew, and block up good bulkhead, to ensure outside form joint
Not spillage liquid.
To accelerate concrete hardening and preventing local freezing, the J851 morning of cement weight 2.5%~4% is added in concrete
The MRT early strength antifreezing agents of strong antifreeze water reducer and cement weight 3%~4%, both materials have improvement concrete and easy
Property and density, strengthen concrete anti-permeability performance and freexing tolerance, and construction when strengthen concrete vibrating, prevent honeycomb fiber crops
Face.
Tunnel-liner should strengthen the continuity of concrete construction, strengthen to concrete curing, to prevent frozen soil to concrete
There is freeze injury.
The utility model has advantages below：
(1) groundwater environment is protected, it is to avoid polluted underground water water quality during constructing tunnel.
(2) groundwater resources of preciousness have been saved by using freezing water sealing structure, it is to avoid drainage construction on a large scale,
Avoid simultaneously periphery that drainage construction causes it is neighbouring build, the sedimentation and deformation of structures.
(3) thermal insulation concrete is set by between Tunnel Second Lining and frozen soil sealing layer, improves frozen soil sealing layer
Heat-insulating property, slow down frozen soil sealing layer with tunnel in heat transfer, considerably reduce and freeze expense.
Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle
Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.
Claims (8)
1. a kind of subway station water sealing structure for protecting groundwater environment, it is characterised in that including：The frozen soil sealing of V-arrangement
Layer, two stifled vertical frozen soil walls are set in the space that surrounds of frozen soil sealing layer of the V-arrangement；The vertical frozen soil wall and the V-arrangement
Frozen soil sealing layer be connected.
2. it is used to protect the subway station water sealing structure of groundwater environment as claimed in claim 1, it is characterised in that the V
The midline position of subway station is crossed in the bottom of the frozen soil sealing layer of shape.
3. it is used to protect the subway station water sealing structure of groundwater environment as claimed in claim 1, it is characterised in that the V
The thickness of the frozen soil sealing layer of shape is 0.5m~2.0m.
4. it is used to protect the subway station water sealing structure of groundwater environment as claimed in claim 1, it is characterised in that described perpendicular
The thickness of straight frozen soil wall is 0.5m~3.0m.
5. it is used to protect the subway station water sealing structure of groundwater environment as claimed in claim 1, it is characterised in that the V
The inside of the frozen soil sealing layer of shape, the inside of the vertical frozen soil wall are respectively provided with to be set in multiple freezing holes, the freezing hole to be frozen
Knot pipe.
6. it is used to protect the subway station water sealing structure of groundwater environment as claimed in claim 5, it is characterised in that the jelly
A diameter of 50mm~200mm in hole is tied, it is described to freeze 500~1000mm of pitch of holes.
7. it is used to protect the subway station water sealing structure of groundwater environment as claimed in claim 5, it is characterised in that the V
The frozen soil sealing layer of shape and the mean temperature of the vertical frozen soil wall are not higher than -10 DEG C.
8. the subway station water sealing structure for protecting groundwater environment as described in claim any one of 1-7, its feature exists
In the foundation ditch both sides ground laying heat-insulation layer of the subway station, the inner surface injection thermal insulation concrete of the foundation ditch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620588959.6U CN206204973U (en) | 2016-06-16 | 2016-06-16 | Subway station water stop structure for protecting groundwater environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620588959.6U CN206204973U (en) | 2016-06-16 | 2016-06-16 | Subway station water stop structure for protecting groundwater environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191207A (en) * | 2017-07-12 | 2017-09-22 | 北京首尔工程技术有限公司 | A kind of station bottom water shutoff construction method and station bottom water shutoff construction |
-
2016
- 2016-06-16 CN CN201620588959.6U patent/CN206204973U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191207A (en) * | 2017-07-12 | 2017-09-22 | 北京首尔工程技术有限公司 | A kind of station bottom water shutoff construction method and station bottom water shutoff construction |
| CN107191207B (en) * | 2017-07-12 | 2018-10-19 | 北京首尔工程技术有限公司 | A kind of station bottom water shutoff construction method and station bottom water shutoff construction |
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