CN206309408U - Low and intermediate level radioac grotto type disposal site waterproof and water drainage system - Google Patents

Abstract

The utility model discloses low and intermediate level radioac grotto type disposal site waterproof and water drainage system, including antiseepage abutment wall and base plate and waterproof ceiling in grotto, antiseepage abutment wall and base plate take the shape of the letter U, waterproof ceiling is in inverted U-shaped, waterproof ceiling is with antiseepage abutment wall and base plate in fastening closed, antiseepage abutment wall and base plate inner side are provided with clay side wall and base plate, clay side wall and base plate interior place pail for used dressings, antiseepage abutment wall and plate outer side, waterproof ceiling end lower section is provided with open drain, antiseepage abutment wall and base plate top, waterproof ceiling is internally provided with crane girder, crane and grouting pipeline and nozzle are provided with crane girder, the pre-buried pipeline of crown is provided with grotto crown.The grotto safeguard structure that the utility model is preferably solved in the presence of current engineering measure is single, and the grouting that can only slow down, reduce space between the problem and pail for used dressings of speed that pollutant discharges from protective equipment and magnitude vibrates construction a series of problems, such as produce radiation injury to personnel.

Description

Low and intermediate level radioac grotto type disposal site waterproof and water drainage system

Technical field

The utility model is related to nuclear power technology, in particular to a kind of low and intermediate level radioac grotto type disposal site waterproof and water drainage system.

Background technology

With continuing to develop for nuclear industry, a large amount of radwastes certainly will be produced, it is effective, appropriate for radwaste The safety dealt with relationship to nuclear industry sustainable development and environment for human survival.

Related specifications regulation, basic, normal, high radwaste can be divided into by radioactive activity level by nuke rubbish.Wherein, it is high Put waste typically to be disposed using deep geologic, conceptual phase is currently still in the world, high-level waste is in temporary state. Low, medium-level waste typically uses near surface disposal, including shallow embedding or grotto disposal, currently has in the world at a small number of shallow embeddings and grotto The case put, and China only has Guangdong north dragon shallow embedding disposal site, Gansu northwest shallow embedding disposal site, not yet there is grotto type disposal site case Example.

According to low, medium-level waste rate of decay, it is desirable to the safe disposal of low, middle level radioactive waste grotto disposal site Design period is generally 300 years to 500 years.Research shows that the main carriers and approach of radwaste diffusion pollution are water.Cause This, takes effective waterproof drainage measure to prevent contact of the radwaste with water, reduce Spent Radioactive within design period The possibility that thing is discharged with unacceptable concentration external environment, is the key for preventing and treating radwaste diffusion pollution.

In view of correlation engineering experience is deficient both at home and abroad, technological means is limited, existing engineering measure exists following a variety of Drawback：

(1) grotto waterproof/drainage structure is single, and waterproof effect and durability are poor

According to external experience, concrete lining structure is set typically in grotto.It is anti-as dash by the use of concrete structure Shield barrier, intercepts cavern's surrounding water and enters grotto, plays a part of isolation water body and radioactive substance produces contact, it is to avoid put Injectivity waste is in the forms such as liquid into the various serious consequences brought after the ecosphere.

The long-term load work under certain external force (deadweight, rock pressure, water pressure) due to cavern's lining concrete, will not Can avoid because structure crack formed crack.Therefore, single conventional concrete waterproof and drain measure can not effectively intercept radiation Property waste with the external world hydraulic connection, can only slow down, reduce speed and magnitude that pollutant discharges from protective equipment.

(2) grouting vibrates construction to personnel's generation radiation injury

For the space between the pail for used dressings (200L, 400L metal drum or entirety container HIC high) for depositing radioactive substance Grouting filling treatment need to be typically carried out according to existing external experience, is led to blocking the diffusion after waste may be leaked in bucket Road.

It is closely knit to ensure grouting filling, generally require to take manual site to vibrate processing.Due to close contact radioactivity Waste, even if requiring operating personnel's wearing protective garment and strictly controlling the engineering time, however it remains be subjected to the risk of radiation injury.

To sum up affiliated, low, the medium-level waste existing waterproof and drain measure of grotto type disposal site and material property cannot meet and set The strict demand of the security and durability of disposal site in the meter time limit, while potential injury is caused to workmen's personal safety, Urgently R ＆ D design goes out a kind of new low, medium-level waste grotto type disposal site waterproof and water drainage system.

The content of the invention

The purpose of this utility model is the weak point for overcoming above-mentioned existing background technology, for low, middle horizontal radiation Property the existing waterproof and drain measure of the waste grotto disposal site single concrete structure that exists can not effective water proof, can only slow down, reduce The construction of vibrating of speed that pollutant discharges from protective equipment and the problem of magnitude and grouting produces radiation injury etc. to personnel Relevant issues, develop a kind of low and intermediate level radioac grotto type disposal site waterproof and water drainage system, meet the peace of disposal site in design period The strict demand of full property and durability.

Low and intermediate level radioac grotto type disposal site waterproof and water drainage system designed by the utility model, including it is anti-in grotto Abutment wall and base plate and waterproof ceiling are oozed, it is characterized in that, the antiseepage abutment wall and base plate take the shape of the letter U, the waterproof ceiling is in Inverted U-shaped, the bottom opening width of the waterproof ceiling is more than antiseepage abutment wall and the open top width of base plate, the waterproof ceiling With antiseepage abutment wall and base plate in closed is fastened, the antiseepage abutment wall and base plate inner side are provided with clay side wall and base plate, described Clay side wall and base plate interior place pail for used dressings, the antiseepage abutment wall and plate outer side, the waterproof ceiling end lower section row of being provided with The bright ditch of water, the antiseepage abutment wall and base plate top, waterproof ceiling bottom are provided with crane girder, and crane is provided with the crane girder And grouting pipeline and nozzle, the pre-buried pipeline of crown is provided with the grotto crown.

Further, between the antiseepage abutment wall and base plate and grotto hole wall, between waterproof ceiling and cavern's dome formed Reserved isolation cavity.Reserving for cavity, can completely separate the hydraulic connection in body of groundwater and grotto between pail for used dressings, it is ensured that fortune Departure date safety.Additionally, concrete sidewall can be made only to be worked under gravity load using the isolation cavity, not by rock pressure and Groundwater pressure is acted on, and effectively reduces the load-bearing size of structure, improves its Degree of Safety.

Further, wireless transmission camera is provided with the crane girder, is set on the clay side wall and base plate There is fluorescence scale.The grout filling in space between by the way that remote controlled manner carries out pail for used dressings outside the venue using disposal, can be without operation Personnel enter the area's interior construction of disposal site pile, prevent it from being influenceed by radioactive radiation.Coordinate fluorescence scale is joined as visualization Examine and be, realize long-range " dot lattice printing formula " being precisely controlled property grouting, it is ensured that the thickness and packing of grouting.

Further, the S-shaped laying of the pre-buried pipeline of the crown.The pre-buried pipeline of crown sets one every 3m~5m Individual grout outlet, the aperture of grout outlet is alternately arranged successively according to the rule on the right side of axis left side, axis center, axis.

Further, the grotto inwall is provided with hole wall spray shield, and crack envelope is provided with the grotto inwall crack Close, it is ensured that the project durability of grouting material, the migration of radionuclide can be blocked while waterproof.

Research and development theory of the present utility model and principle include：

(1) multibarrier protection

Guarded drainage multiple defense system is built, including water proof barrier and the class of radionuclide retention barrier two have complementarity Level, ultimately form a complete function entirety.

(2) it is active, passive to be combined

In addition to related active working measure (concreting, grouting, spraying etc.), necessary passive draw is set Stream, guide measure, it is ensured that the charge for remittance that waterproof and water drainage system is collected can realize gravity flow, arrange certainly.

(3) runtime, preservation life are taken into account

The disposal site partite transport departure date and preservation life.Runtime refers to the period built up and be followed by progressively being filled by nuke rubbish, is such as core The disposal site of power station service, its filling runtime was up to 60 years~80 years；Preservation life refers to that disposal site was filled up after closing to design year The period of limit.In the disposal site runtime, it is ensured that the hydraulic connection that engineering measure can be between completely isolated underground water and nuclear waste, cut-out The release approach of radioactive substance；After disposal site is closed, it is ensured that the stability of cavern, the durability of engineering material and guarded drainage The continuity of function.

(4) rigid flexible system, " suspension " is stacked

In each layer barrier of waterproof and water drainage system, in addition to mechanical strength and rigidity coagulation great soil group structures high are set, Also need to arrange the flexible material that necessary elastic modelling quantity is relatively low.Using the good ductility of such material, as rigid material " buffering (every) bed course ", to tackle the disposal site relatively large deformation that (such as uplift, earthquake) may occur under geologic process, keeps away Exempt from protective barrier comprehensive brittle break to occur and fails.

Particularly, it is considered to laid between pail for used dressings heap code layer bottom, bucket and in the space of interlayer, irrigate flexible material, made Obtain and rigid contact is not produced between pail for used dressings and disposal site and pail for used dressings so that each pail for used dressings is able to the form submergence of " floating support " It is embedded.

(5) flexible blockage material module it is prefabricated, intelligence construction

Plugging material to grotto disposal site closed-down period carries out modularization pre-production, mass production.Meet each module Between be easy to pile, compact construction requirement, while be considered as remote numerical control or directly using intelligent robot complete envelope The pile work of stifled material.

The utility model patented technology has done that innovative is great to be changed to low, medium-level waste grotto type disposal site waterproof and water drainage system Enter, the grotto safeguard structure preferably solved in the presence of current engineering measure is single, can only slow down, reduce pollutant from anti- The grouting in space vibrates construction to personnel's generation radiation injury between the speed and the problem and pail for used dressings of magnitude that are discharged in shield facility A series of problems, such as.With tradition is low, compared with medium-level waste grotto type disposal site guarded drainage technology, the utility model has following aobvious Write advantage and good effect：

(1) security is higher during running

By systematically isolating and using cavity with being reserved between concrete sidewall in grotto hole wall, waterproof top is laid in grotto dome Canopy, sets open drain and is equipped with drainage system in cavity bottom, can be complete in the way of physical isolation during disposal site runs Face separates the hydraulic connection between pail for used dressings in underground water and grotto, accomplishes that runtime water body does not enter nuclear waste disposal area, radiates Property material contacted with the zero of underground water, make radioactive substance without propagation medium, surrounding environment is realized completely pollution-free.

(2) nuclear radiation injury to grouting operation personnel is lowered

The grout filling in space between by the way that remote controlled manner carries out pail for used dressings outside the venue using disposal, can be without operating personnel Into the area's interior construction of disposal site pile, prevent it from being influenceed by radioactive radiation, while having grouting precision higher.

(3) security isolation of cavern's monolithic stability and nucleic after disposal site closing is ensured

Using special high density, high intensity bentonite in lump as grotto internal pore main body filler, not only favorably In the adjoining rock stability of cavern, and compared to traditional loose earth material filling and its grinding operation, the operation of prefabricated section pile is more applicable Constructed in small space, and can guarantee that the quality requirement of backfill material packing.Additionally, stinging using bentonite in lump sawtooth side The seepage flow approach that underground water is in close contact and effectively extended between effect not only contributes to prefabricated section is closed, is aided with fissure of displacement ornaments shape Formula, is more conducive to form infiltration continuous obstruction.

Remaining local abnormity space is filled after being filled to prefabricated section using bentonite bulk solid, and further improving should The packing at position.

The cement clay slip irrigated using crown position, further in completion grotto, outside the pail for used dressings closure in all spaces, Ensure that the monolithic stability of later stage cavern.

To sum up, by between pail for used dressings grouting, bucket week clay blanket, concrete frame, cavity isolation, bentonite in lump pile, The waterproof and drain measure of the multiple tracks hypotonicity medium such as the filling of bentonite bulk solid and crown grouting, effectively reduces the disposal site runtime And the immersion speed seeped water after closing, it can be ensured that radionuclide is limited in the range of disposal site within design period.

Brief description of the drawings

Fig. 1 is the utility model low and intermediate level radioac grotto type disposal site waterproof and water drainage system in disposal site construction+runtime Structural representation.

Fig. 2 is the pre-buried pipeline of crown and grout outlet arrangement in Fig. 1.

Fig. 3 is grouting control coordinate grid scale layout drawing.

Fig. 4 is the utility model low and intermediate level radioac grotto type disposal site waterproof and water drainage system in disposal site closing+preservation life Structural representation.

Fig. 5 is weeper drain drawing in Fig. 4.

Fig. 6 is the structural representation of Type B bentonite in lump in Fig. 4.

Fig. 7 is the pile schematic diagram of Type B bentonite in lump in Fig. 4.

In figure：Hole wall spray shield 1, crack closing 2, open drain 3, antiseepage abutment wall and base plate 4, waterproof ceiling 5, isolate cavity 6, clay side wall and base plate 7, pail for used dressings 8, cement clay slurries 9, crane girder 10, be in the milk pipeline and nozzle 11, crown built-in pipe Road 12, concrete top cover 13, A types bentonite in lump 14, Type B bentonite in lump 15, bentonite bulk solid 16, weeper drain 17, pulp Mouth 18.

Specific embodiment

Below in conjunction with the accompanying drawings and embodiment is described in further detail to the utility model, but the embodiment should not be understood It is to limitation of the present utility model.

The utility model low and intermediate level radioac grotto type disposal site waterproof and water drainage system is located in grotto, and grotto inwall is provided with hole Wall spray shield 1, is provided with crack closing 2 at grotto inwall crack.1~Fig. 3 of reference picture, the system includes U-shaped concrete frame knot The antiseepage abutment wall and base plate 4 of structure, antiseepage abutment wall and the both sides of base plate 4 are disengaged with grotto wall is excavated, it is to avoid rock mass deformation is drawn The secondary cracking of concrete structure for rising.By the use of the frame structure as the stacking space of radwaste bucket, as radioactive material Three-dimensional (horizontal both sides and bottom) isolation barrier space of matter.Grotto top hangs inverted U-shaped fiberglass waterproof ceiling 5, and waterproof The end outsourcing antiseepage abutment wall of ceiling 5 and base plate 4, in shape is fastened, form tea cup with a cover formula closed boundary.During radwaste is filled, After the infiltration of grotto crown position, water body is dropped in trailing surface plate on waterproof ceiling 5 and takes advantage of a situation landing, hereafter can be seeped water with grotto side wall Together enter the open drain 3 of concrete walls and palisades cavity bottom, it is to avoid water body contacts concrete walls.Said structure causes to prevent Ooze between abutment wall and base plate 4 and hole wall, fiberglass waterproof ceiling 5 reserved isolates cavity 6 with being formed between cavern's dome palisades.Isolation Reserving for cavity 6, can completely separate the hydraulic connection in body of groundwater and grotto between pail for used dressings, it is ensured that runtime safety.Additionally, Antiseepage abutment wall and base plate 4 can be made only to be worked under gravity load using cavity 6 is isolated, not by rock pressure and ground water pressure masterpiece With, the load-bearing size of structure is effectively reduced, improve its Degree of Safety.Isolation cavity 6 bottom sets concrete open drain 3, It is used to collect the crevice water from grotto side wall and dome, percolating water and condensate.Set special in disposal site unit end Sump and drainage system, the ponding in timely white-out open drain 3, prevent charge for remittance be raised to after concrete sidewall produce into Ooze.

Antiseepage abutment wall and the top of base plate 4, waterproof ceiling 5 are internally provided with crane girder 10, and crane is provided with crane girder 10 And grouting pipeline and nozzle 11, the pre-buried pipeline 12 of crown is provided with grotto crown.The crown S-shaped laying of pre-buried pipeline 12, ginseng According to Fig. 2.The pre-buried pipeline 12 of crown sets a grout outlet 18 every 3m~5m, and the aperture of grout outlet 18 is according to axis left side, axle Rule on the right side of line center, axis is alternately arranged successively.

Antiseepage abutment wall and the inner side of base plate 4 are provided with clay side wall and base plate 7, and waste is placed in clay side wall and the inside of base plate 7 Bucket 8.After completing the individual layer pile of pail for used dressings 8, the cement clay in 8 spaces of pail for used dressings is carried out using remote controlled manner outside the venue is disposed The grout filling of slurries 9.Numerical control crane on crane girder 10 is fixed on by by grouting pipeline and nozzle 11 and wireless transmission camera Head position, while laying grouting height and horizontal coordinate fluorescence scale conduct on clay side wall and base plate 7 in the disposal unit Visualization referential, reference picture 3 realizes long-range " dot lattice printing formula " being precisely controlled property grouting, it is ensured that the thickness of grouting and closely knit Degree.

When disposal site enters closing and preservation life, reference picture 4, Fig. 5, to prevent possible underground water enchroachment (invasion) after disposal area is closed Enter inside grotto, between concrete side wall and grotto hole wall isolate cavity 6 backfill closing before, the open drain 3 of bottom is changed Cause weeper drain 17.Using special high density, resistance to compression high, bentonite prefabricated section (A types bentonite in lump 14, Type B bentonite in lump 15) position such as remaining space between foregoing antiseepage abutment wall and base plate 4 and palisades, above pail for used dressings is carried out into fissure of displacement pile filling, Ensure later stage cavern's resistance to overturning, and reduced using its extremely low permeability or delay crevice water, percolating water and underground water enchroachment (invasion) Enter, block the migration of radionuclide.During bentonite prefabricated section (A types bentonite in lump 14, Type B bentonite in lump 15) pile, Using prefabricated " pill shape " bentonite bulk solid 16 by above-mentioned bentonite prefabricated section and Dong Bi, antiseepage abutment wall and base plate 4, waterproof Remaining space between ceiling 5 is filled, and using its contained montmorillonite mineral high water absorption and highly expanded characteristic, as every Water cushion；Additionally, the bentonite bulk solid 16 also is laid on into cavity bottom as screed-coat, it is easy to foregoing bentonite prefabricated The pile of block is smooth.The pre-buried pre-buried pipeline 12 of crown is pushed up using hole.Space between grotto crown and waterproof ceiling 5 is carried out The perfusion filling of cement clay slip, all pre- closure for interspacing during completing operation.After disposal area backfill closing, grotto side-walls The underground water for oozing out will be along between hole wall and backfilling material (bentonite prefabricated section Type B bentonite in lump 15, bentonite bulk solid 16) Seepage channel enters in the displacement hull of weeper drain 17.By collecting and guide for weeper drain 17, rock mass infiltration gravity flow drains into place Put outside area.

The construction method of the utility model low and intermediate level radioac grotto type disposal site waterproof and water drainage system, 1~Fig. 7 of reference picture, bag Include disposal site construction+runtime and closing+preservation life.

A) disposal site construction+runtime

A1) according to design, it is disposed grotto excavation.

A2) grotto hole wall cranny development and seepage part carry out closure grouting treatment.The general 1.5m of closure grouting hole array pitch × 1.5m~2m × 2m, grouting method be palisades shotcrete support after take uncovered to be in the milk again.Grouting material is tentative to use water Mud clay slurry, specific material component and proportioning combination fracture opening etc. comprehensively determine.Cranny development and seepage part are through grouting After treatment forms hole wall spray shield 1 and crack closing 2, the barrier performance of rock mass is not less than 10^-6Cm/s, and ensure that palisades are dried or office The micro- humidity in portion, wired stream and must not drip.

A3 the antiseepage abutment wall and base plate 4 of U-shaped concrete frame structure) are poured, its side wall position is apart from grotto side wall 1m, shape Into isolation cavity 6, base plate and side wall thicknesses are 1.0m~1.2m.

A4 the pre-buried pipeline 12 of continuous serpentine crown) is buried in cavern's crown, setting one every 3m~5m along pipeline goes out Slurry mouth 18, aperture is alternately arranged successively according to axis left side 3m, axis center, the rule of axis right side 3m.

A5 inverted U-shaped high strength glass fiber reinforced plastic waterproof ceiling 5, ceiling thickness 5cm) are processed；Installed at grotto crown 50cm The waterproof ceiling 5,3m in the two ends of waterproof ceiling 5 insertion isolation cavity 6, two ends and the antiseepage abutment wall and base plate 4 of waterproof ceiling 5 are in Fasten closed.

A6) grotto lower sidewall sets concrete open drain 3, and the sectional dimension of open drain 3 is 0.5m × 0.5m.Draining Current direction collecting-tank in bright ditch 3, collecting-tank should have appropriate capacity, and the water body after monitoring is qualified discharges hole by drainage system Outward.

A7 1m, 0.3m~0.5m) are respectively provided with the concrete side wall border and concrete floor of antiseepage abutment wall and base plate 4 Thick clay blanket, forms clay side wall and base plate 7, clay requirement optimum moisture content be issued to maximum can grinding compacting degree, Infiltration coefficient should be up to 10 simultaneously^-8Cm/s or lower.

A8 crane girder 10 and remote control grouting) are set up inside antiseepage abutment wall and the top of base plate 4, waterproof ceiling 5 Pipe-line system (bracket of the placement slideway of crane girder 10), sets grouting pipeline and nozzle 11, and will wirelessly pass on crane girder 10 Defeated camera is fixed on numerical control crane head position on crane girder 10.Phosphor strips arranged or brushing at clay side wall and base plate 7 Fluorescent material, formed control coordinate grid, grid level to spacing be 50cm, vertically to spacing be 20cm.

A9 cement clay slip) is carried out space between pail for used dressings 8 after the completion of the layering of pail for used dressings 8 filling pile in disposal tunnel Liquid 9 is irrigated.Filling process by the use of fluorescence scale as visualization referential, precise control grouting pipeline and nozzle 11 level move Dynamic distance and the grouting thickness on the surface of pail for used dressings 8 --- orlop bucket upper surface grouting thickness 100mm, remainder layer pail for used dressings 8 Grouting thickness is 50mm.

B) disposal site closing+preservation life

B1) before the isolation backfill closing of cavity 6, the open drain 3 of bottom is transformed into weeper drain 17.Weeper drain 17 Interior point of 3 layers of backfill, lay 30cm thickness sand gravel, 10cm thickness coarse sand, 10cm thickness medium-fine sands respectively from below to up.

B2) crane girder 10, and concrete top cover 13 is laid on pail for used dressings 8.After a disposal unit fills waste bag, The equipment such as the ventilating system in the disposal unit, communication system, illuminator are removed or isolated, and is prepared to the disposal Remaining space is filled with backfilling material in unit.

B3) backfill A types bentonite in lump 14 in prepared cavity：By bentonite material and water according to 1:After 0.2 ratio mixing, The uniaxial compression for having lateral spacing is carried out, it is 25~50MPa to apply axial stress size, and bentonite in lump size is after completing compression 570mm × 500mm × 400mm (length × width × height), dry density need to reach 1650kg/m³And more than, while infiltration coefficient should reach 10^-8Cm/s or lower.

Prepare backfill zigzag Type B bentonite in lump 15 in cavity：Processing zigzag Die and mould plate, wherein sawtooth are in isosceles three Angular, drift angle is 30 °~45 °, Die and mould plate 350mm high, and the distance between two tips template sideline at angle is 15mm~25mm.Using the mould Tool, is compressed to bentonite under the moisture content and axial compressive force same with A types bentonite in lump 14 and is shaped to rectangle both sides saw Dentation bentonite in lump, for 280mm × 200mm × 250mm, (length × width × height is not counted in the size of bentonite in lump after completing to compress Sawtooth), sexual satisfaction is foregoing also requires that for dry density and infiltration.

Prepare bentonite bulk solid 16：By bentonite material and water according to 1:After 0.2 ratio mixing, by pushing --- Pulling out bar --- cutting mode batch forms a diameter of 6mm, length for 6mm~22mm, dry density 800kg/m³~850kg/m³, ooze Saturating coefficient should be up to 10^-8Cm/s or lower particulate structure.

B4) using A types bentonite in lump 14 between the pile area top concrete top cover 13 of pail for used dressings 8 and antiseepage ceiling 5 Space carries out pile backfill.Isolate the base plate position of cavity 6 laying bentonite between antiseepage abutment wall and base plate 4 and grotto hole wall to dissipate Plastochondria 16 forms screed-coat, and screed-coat thickness is 100mm~150mm, hereafter carries out pile backfill using Type B bentonite in lump 15, Pile process is it is ensured that sawtooth is closely engaged between fragment of brick.

B5) on this basis, using bentonite bulk solid 16 by between above-mentioned A types bentonite in lump 14 and waterproof ceiling 5 with And Type B bentonite in lump 15 and grotto hole wall, the remaining space between antiseepage abutment wall and base plate 4 are filled, further improving should The packing at position and as water proof cushion.

B6) finally the pre-buried pre-buried pipeline 12 of crown is pushed up using hole to enter the space between grotto crown and waterproof ceiling 5 The perfusion filling of water-filling mud clay slip, all pre- closure for interspacing during completing operation.

Other unspecified parts are prior art.

Claims (6)

1. low and intermediate level radioac grotto type disposal site waterproof and water drainage system, including antiseepage abutment wall and base plate (4) in grotto and anti- Water ceiling (5), it is characterised in that：The antiseepage abutment wall and base plate (4) take the shape of the letter U, and the waterproof ceiling (5) is described anti-in inverted U-shaped The bottom opening width of water ceiling (5) more than antiseepage abutment wall and base plate (4) open top width, the waterproof ceiling (5) with Antiseepage abutment wall and base plate (4) are provided with clay side wall and base plate in closed, the antiseepage abutment wall and base plate (4) inner side is fastened (7) pail for used dressings (8), the antiseepage abutment wall and base plate (4) outside, waterproof ceiling, are placed inside the clay side wall and base plate (7) (5) end lower section is provided with open drain (3), and the antiseepage abutment wall and base plate (4) top, waterproof ceiling (5) are internally provided with Crane girder (10), is provided with crane and grouting pipeline and nozzle (11) on the crane girder (10), set in the grotto crown There is the pre-buried pipeline of crown (12).

2. low and intermediate level radioac grotto type disposal site waterproof and water drainage system according to claim 1, it is characterised in that：The antiseepage Formed between abutment wall and base plate (4) and grotto hole wall, between waterproof ceiling (5) and cavern's dome palisades and reserved isolate cavity (6)。

3. low and intermediate level radioac grotto type disposal site waterproof and water drainage system according to claim 1, it is characterised in that：The crane Wireless transmission camera is provided with beam (10), fluorescence scale is provided with the clay side wall and base plate (7).

4. the low and intermediate level radioac grotto type disposal site waterproof and water drainage system according to claims 1 or 2, it is characterised in that：Institute State crown pre-buried pipeline (12) S-shaped laying.

5. low and intermediate level radioac grotto type disposal site waterproof and water drainage system according to claim 1, it is characterised in that：The grotto Inwall is provided with hole wall spray shield (1), and crack closing (2) is provided with the grotto inwall crack.

6. low and intermediate level radioac grotto type disposal site waterproof and water drainage system according to claim 4, it is characterised in that：The crown Pre-buried pipeline (12) sets a grout outlet (18) every 3m~5m, the aperture of grout outlet (18) according to axis left side, axis just In, the rule on the right side of axis is alternately arranged successively.