CN110441208A - A kind of landfill site seepage prevention system tracking and monitoring well and its method for arranging - Google Patents
A kind of landfill site seepage prevention system tracking and monitoring well and its method for arranging Download PDFInfo
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- CN110441208A CN110441208A CN201910735149.7A CN201910735149A CN110441208A CN 110441208 A CN110441208 A CN 110441208A CN 201910735149 A CN201910735149 A CN 201910735149A CN 110441208 A CN110441208 A CN 110441208A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 172
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000002265 prevention Effects 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000002352 surface water Substances 0.000 claims abstract description 11
- 238000005553 drilling Methods 0.000 claims abstract description 9
- 238000010521 absorption reaction Methods 0.000 claims description 11
- 230000001154 acute effect Effects 0.000 claims description 6
- 239000010410 layer Substances 0.000 description 72
- 239000002689 soil Substances 0.000 description 16
- 239000007788 liquid Substances 0.000 description 8
- 239000002699 waste material Substances 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- 238000005457 optimization Methods 0.000 description 6
- 239000004576 sand Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000000700 radioactive tracer Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000005213 imbibition Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- -1 inner tube Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/006—Sealing of existing landfills, e.g. using mining techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Hydrology & Water Resources (AREA)
- Processing Of Solid Wastes (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of landfill site seepage prevention system tracking and monitoring well and its method for arranging, method for arranging includes monitoring well wellbore drilling and embedded monitoring well.Monitoring well wellbore drilling step: drilled through outside landfill yard profile it is several one section of tubular silk screen is set on one section of conduit with the staggered monitoring well wellhole group of X-shaped, the diameter of conduit is less than monitoring well wellhole；One section of inner tube is inserted into conduit with one heart, interior pipe surface offers flowing hole；Tubular silk screen, conduit, inner tube are placed in together in monitoring well wellhole；Cobblestone is poured into monitoring well wellhole, outside silk screen from earth's surface as cricoid outer layer filled layer, one section in close earth's surface replaces cobblestone to be filled with annular air-pocket, and the lowest part of annular air-pocket is lower than local 1 meter of lowest water level of surface water or more；Sandstone is poured into conduit, outside inner tube from earth's surface as internal layer filled layer, one side withdrawal conduit during toppling over is until internal layer filled layer is filled to earth's surface；Leakage sensors are placed in inner tube.
Description
Technical field
The present invention relates to refuse landfill antiseepage leak hunting method field, specifically a kind of landfill site seepage prevention system tracking and monitorings
Well and its method for arranging.
Background technique
In social production, the yield of rubbish is higher and higher, and in waste disposal method, landfill accounts for very big specific gravity, and rubbish is filled out
Field is buried by leaking caused secondary pollution, surrounding soil and underground water can be jeopardized.In rubbish type, dangerous waste
Rubbish, this kind of rubbish need its pollution of strict control, otherwise can generate very big injury to environment and people.
Rubbish usually generates waste liquid after landfill, and waste liquid leaks into after impervious barrier and generates high risks in soil, institute
To need antiseepage to detect, detection means has fluorescent traccer technique, temperature tracer method etc., these methods need ordinatedly in landfill yard
Around setting monitoring well detect leakage situation, leakage fluid reach in monitoring well after by leakage sensor detect and to the external world to
Signal out.
In the prior art, monitoring well generally indiscriminately imitates conventional groundwater monitoring well construction, one section of Vertical Well, in surrounding soil
Liquid flow into well in after be detected, this setup has Railway Project: 1, horizontal direction coverage area is small, a monitoring well
A pocket nearby can only be monitored, it is complete for monitoring, need to be arranged many monitoring wells；2, leak position is inconvenient really
It is fixed, it needs to obtain leak position by the leak detection means of auxiliary, or carry out the complete and comprehensive people of landfill yard after leaking
Work inspection；3, surface water can be flowed into monitoring well from topsoil and be had an impact to monitoring of structures.
Summary of the invention
The purpose of the present invention is to provide a kind of landfill site seepage prevention system tracking and monitoring well and its method for arranging, existing to solve
There is the problems in technology.
To achieve the above object, the invention provides the following technical scheme:
Landfill site seepage prevention system tracking and monitoring well is evenly distributed with several groups in landfill yard excircle, includes two X-shapeds in every group of monitoring well
Staggered monitoring well, monitoring well include outer layer filled layer, silk screen, conduit, internal layer filled layer, inner tube, water absorption layer, leakage sensors
7, silk screen is set on conduit, and inner tube is inserted into conduit with one heart, and interior pipe surface offers flowing hole, in monitoring well wellhole, silk screen
Outer setting outer layer filled layer, conduit is interior, internal layer filled layer is arranged in inner tube outside, several leakages are arranged in inner tube in the axial direction and pass
Sensor.
Water absorption layer is filled in inner tube.
Outer layer filled layer lower part is cobblestone, top is annular air-pocket.
Silk screen has flange, and after silk screen is placed in monitoring well wellhole, the flange of silk screen is located at borehole bottom；Direction in inner tube
The side flowing hole closeness of landfill yard is greater than away from the side of landfill yard, and inner tube is well casing special PVC pipe.
A kind of landfill site seepage prevention system tracking and monitoring well method for arranging, including monitoring well wellbore drilling step and embedded monitoring
Well step.
Further, monitoring well wellbore drilling step includes:
S11: two are drilled through outside landfill yard profile with the staggered monitoring well wellhole of X-shaped, the axis of two wellholes and vertical side
To at an equal acute angle；Detection system is set in monitoring well, and detection system is usually concentration sensor or fluorescence inductor etc.
Deng different and different depending on leak-hunting principle, leak-hunting principle can be fluorescent traccer technique, temperature tracer method, electrode method etc..Monitoring well
Interlaced arrangement becomes one group in a manner of X-shaped, and the synergy when monitoring leakage is common to monitor constructed by four vertex of X-shaped
Rectangular area is certainly mainly to monitor this rectangular area, diffused through outside region come leakage also can in this monitoring well quilt
It observes, but the leakage outside this X-shaped monitoring well group region is more mainly monitored by following structure, when leakage occurs, leakage
Liquid is diffused in the soil, when reaching the monitoring well of one group of X-shaped, the concentration generated in two monitoring wells difference, this
One difference can help monitoring personnel to determine approximately the horizontal position of leakage, what leak source was shown in two tilting monitoring wells
Concentration peak be it is approximate contour, this height and position cooperates horizontal position above-mentioned to determine the final position of leak source.X-shaped cloth
Two monitoring wells are set, it is larger for the cornerite of landfill yard, the setting quantity of monitoring well can be saved.
S12: repeating S11, uniformly drill through several groups wellhole in landfill yard profile outer circle circumferential direction, until wellhole is for landfill
The cornerite summation of field is greater than 240 °.It is respectively arranged monitoring system in several groups wellhole, surrounds landfill yard, monitors in all directions
Leakage, although one group of X-shaped monitoring well is larger compared to the monitoring well monitoring range being vertically arranged, can not completely monitor whole
A landfill yard, so setting multiple groups monitoring well cooperating syringe, more can completely monitor all sides after total cornerite is greater than 240 °
Upward leakage when landfill yard is round, monitors well group circumference uniform distribution around landfill yard, when landfill yard is rectangular, then four side
Monitoring well group is respectively set, the landfill yard side length of square is longer, then multiple groups monitoring well can be set in a line.
As optimization, borehole axis and acute angle formed by vertical direction are 20 ~ 40 degree in step S11.Borehole axis and perpendicular
Histogram to tilt angle not Ying Tai great, otherwise drilling it is difficult and to bore it is very long get to deeper position, inclination is not also answered
Too small, otherwise one group of monitoring well is just very small relative to the cornerite of landfill yard, can not promote the coverage area of monitoring well, practical work
It is more appropriate within the scope of 20 ~ 40 degree to show inclination angle in journey, and service performance is preferable, subsequent be arranged in well is also facilitated to supervise
Examining system, sensor etc..
As optimization, the bottom of wellhole is vertically lower than 1 ~ 3 meter of landfill yard bottom.The leakage of landfill yard can be
All directions, downward also have a probability, but monitoring well is arranged into the lower section of landfill yard and also less gears to actual circumstances, so only
It can deepen the depth of some monitoring wells to which the waste liquid that some landfill yards leak downward can be monitored.
Further, burying monitoring well step includes:
S21: one section of tubular silk screen is set on one section of conduit, and the diameter of conduit is less than monitoring well wellhole；
S22: one section of inner tube is inserted into conduit with one heart, interior pipe surface offers flowing hole；
S23: tubular silk screen, conduit, inner tube are placed in together in monitoring well wellhole；
S24: cobblestone is poured into monitoring well wellhole, outside silk screen from earth's surface as cricoid outer layer filled layer, closely
One section of table replaces cobblestone to be filled with annular air-pocket, and the lowest part of annular air-pocket is lower than local surface water lowest water level 1
Meter or more；
S25: sandstone is poured into conduit, outside inner tube from earth's surface as internal layer filled layer, is extracted out on one side during toppling over
Conduit is until internal layer filled layer is filled to earth's surface；
S26: several leakage sensors are implanted into along inner tube axis.
Leakage could be identified by needing to be placed in monitoring system in monitoring well, and it is some sensors that monitoring system is for example aforementioned, monitoring
Sensor in well recognizes the water constituent concentration entered in waste liquid or original monitoring well in monitoring well and changes,
Outside outgoing signal, the selection of sensor are not belonging to the problem to be solved in the present invention, not in declared range of the invention.Inner tube
It is inside to place the position of leakage sensors, and external effusion will pass through outer layer filled layer, internal layer filled layer and flowing hole
Internal tube is got to, the filled layer of multilayer is to prevent soil sand grains from reaching at flowing hole to filter soil sand grains and block
Flowing hole, or internal tube is entered, sediment siltation is caused, Monitoring Performance is influenced, cobblestone adds sandstone filter effect to increase greatly
Add；
Silk screen between ectonexine filled layer can maintain the form of ectonexine filled layer, prevent sandstone from rolling out from internal layer filled layer；
And the setting of annular air-pocket is to obstruct surface water body, landfill yard is all outdoor, so having rainy day certainly, rainwater is fallen
It is absorbed, is flowed on the surface layer of soil, small part flow down enters underground water, and a large amount of by topsoil after earth's surface
Water is flow in neighbouring rivers as phreatic water, and the lowest part of rivers, which can be used as, determines the minimum of local surface water
Place, the lowest part of annular air-pocket can stop to fall most surface water to enter monitoring well, prevent its right lower than behind this position
Monitoring of structures has an impact, or generates dilution to leakage fluid, influences leak judgement.
Further, burying monitoring well step further includes step S27: water absorption layer is filled in inner tube.Water warp in soil
Normal is flowed in layers, so effusion also carries out lateral leakages to major part when landfill yard leaks, if
Leakage rate is less, reach monitoring well when, can by water absorption layer absorb and conserve at a certain height, can't in monitoring well low-resistance
The movement of the carry out short transverse of power also just improves monitoring well for the monitoring accuracy of short transverse.
As optimization, water absorption layer is sponge.Sponge lightweight easy processing facilitates acquisition and forming, and water imbibition is more sufficient, be into
The ideal material of row process above.
As optimization, silk screen has flange, and after silk screen is placed in monitoring well wellhole, the flange of silk screen is located at borehole bottom.
Conduit also may be and then extracted because frictional force is larger with silk screen, the flange of silk screen can extracted out in extraction
It prevents from silk screen race from offing normal when conduit to set, because the cobblestone being first filled with can push down silk screen, In after silk screen is positioned into monitoring well
Conduit catches hold of silk screen when extracting out.
As optimization, it is greater than towards the side flowing hole closeness of landfill yard away from the side of landfill yard in inner tube.Overcurrent
The side closeness of hole towards landfill yard is larger, also allow for monitoring well it is more sensitive for the effusion that comes from landfill yard and
Stop to fall some underground water in peripheral soil.
As optimization, inner tube is well casing special PVC pipe.Monitoring well generally has more than ten meters, in the present invention because being tilting
, length might have 20 meters or more, so inner tube not will use a homogeneous tube substantially, because transport is inconvenient and processes
Inconvenience etc., well casing special PVC pipe are made into spliced in which can be convenient, and can easily be connected with clip, screw thread etc.
It connects, and corrosion resistance is also preferable, light portable.
Compared with prior art, it the beneficial effects of the present invention are: the present invention passes through the monitoring well group of arranged crosswise, can improve
The monitoring coverage area of monitoring well obtains complete leakage monitoring with less monitoring well, and changes maximum one by concentration
The leakage parameters that group monitoring well group is identified, determine leak position with can be convenient；The setting of inside and outside filled layer is so that in soil
Sand grains cannot be introduced into monitoring well, prevent overcurrent hole plug or deposit in monitoring well；When filling inside and outside filled layer, lead
Pipe plays isolation guiding role, extracts out in filling, easy to operate；Annular air-pocket can balance out most of topsoil water to prison
The influence of well logging prevents from flowing into rainwater under rainwater weather in monitoring well.
Detailed description of the invention
In order that the present invention can be more clearly and readily understood, right below according to specific embodiment and in conjunction with attached drawing
The present invention is described in further detail.
Fig. 1 is three-dimensional position schematic diagram of the monitoring well of the present invention in landfill yard, with the lines of no diameter instead of prison in figure
Well logging；
Fig. 2 is main view position view of the monitoring well of the present invention in landfill yard, with the lines of no diameter instead of monitoring well in figure；
Fig. 3 is head-down position schematic diagram of the monitoring well of the present invention in round landfill yard；
Fig. 4 is head-down position schematic diagram of the monitoring well of the present invention in rectangular landfill yard；
Fig. 5 is the view A-A rotation in Fig. 4；
Fig. 6 is the view B in Fig. 5；
Fig. 7 is the structural schematic diagram at the top of outer layer filled layer of the present invention.
In figure: 1- outer layer filled layer, 2- silk screen, 3- conduit, 4- internal layer filled layer, 5- inner tube, 51- flowing hole, 6- water suction
Layer, 7- leakage sensors.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Fig. 1 ~ 7, landfill site seepage prevention system tracking and monitoring well is evenly distributed with several groups, every group of monitoring in landfill yard excircle
It include the staggered monitoring well of two X-shapeds in well, monitoring well includes outer layer filled layer 1, silk screen 2, conduit 3, internal layer filled layer 4, interior
Pipe 5, water absorption layer 6, leakage sensors 7, silk screen 2 are set on conduit 3, and with one heart in insertion conduit 3,5 surface of inner tube opens up inner tube 5
There is a flowing hole 51, in monitoring well wellhole, outer layer filled layer 1 is set outside silk screen 2, in conduit 3, internal layer filled layer is set outside inner tube 5
4, several leakage sensors 7 are set in the axial direction in inner tube 5.
Water absorption layer 6 is filled in inner tube 5.
1 lower part of outer layer filled layer is cobblestone, top is annular air-pocket.
Silk screen 2 has flange, and after silk screen 2 is placed in monitoring well wellhole, the flange of silk screen 2 is located at borehole bottom；In inner tube 5
It is greater than towards 51 closeness of side flowing hole of landfill yard away from the side of landfill yard, inner tube 5 is well casing special PVC pipe.
A kind of landfill site seepage prevention system tracking and monitoring well method for arranging, including monitoring well wellbore drilling step and embedded monitoring
Well step.
Monitoring well wellbore drilling step includes:
S11: two are drilled through outside landfill yard profile with the staggered monitoring well wellhole of X-shaped, as shown in Figure 1 and Figure 2, two wellholes
Axis in vertical direction with an equal acute angle；Detection system is set in monitoring well, and detection system is usually concentration sensor
Or fluorescence inductor etc., different and different depending on leak-hunting principle, leak-hunting principle can be fluorescent traccer technique, temperature tracer method, electricity
Pole method etc..Monitoring well interlaced arrangement in a manner of X-shaped becomes one group, and the synergy when monitoring leakage is common to monitor X-shaped four
Rectangular area constructed by a vertex is certainly mainly to monitor this rectangular area, and the leakage come is diffused through outside region and also can
It is observed in this monitoring well, but the leakage outside this X-shaped monitoring well group region is more mainly monitored by following structure, is let out
When leakage occurs, leakage fluid is diffused in the soil, when reaching the monitoring well of one group of X-shaped, is generated in two monitoring wells dense
Difference, this difference can help monitoring personnel to determine approximately the horizontal position of leakage to degree, and leak source is in two tilting prisons
The concentration peak shown in well logging is that approximation is contour, this height and position cooperates horizontal position above-mentioned to determine leak source
Final position.X-shaped arranges two monitoring wells, larger for the cornerite of landfill yard, can save the setting quantity of monitoring well.
S12: as shown in Figure 3, Figure 4, S11 is repeated, uniformly drills through several groups wellhole in landfill yard profile outer circle circumferential direction, directly
It is greater than 240 ° to cornerite summation (a1+a2+ ...) of the wellhole for landfill yard.It is respectively arranged monitoring system in several groups wellhole, wraps
Landfill yard is enclosed, the leakage in all directions is monitored, although one group of X-shaped monitoring well is compared to the monitoring well monitoring range being vertically arranged
It is larger, but can not completely monitor entire landfill yard, so setting multiple groups monitoring well cooperating syringe, is greater than 240 ° in total cornerite
The leakage on all directions more can be completely monitored afterwards, and when landfill yard is round, monitoring well group circumference uniform distribution is in landfill yard week
It encloses, when landfill yard is rectangular, then monitoring well group is respectively set in four sides, and the landfill yard side length of square is longer, then in a line
Multiple groups monitoring well can be set, such as more wellhole will be set, cornerite is made to be 300 °, can completely monitor very much landfill yard
Periphery, and cornerite is arranged to after 200 °, detection coverage area can decline 30% or more.
Borehole axis and acute angle formed by vertical direction are 20 ~ 40 ° in step S11.If by borehole axis and vertical side
To tilt angle be set as 50 °, then the difficulty that drills and to bore it is very long get to deeper position, if by borehole axis with
The tilt angle of vertical direction is set as 10 °, then one group of monitoring well is just very small relative to the cornerite of landfill yard, can not promote prison
The coverage area of well logging will make cornerite reach 240 ° or more, need to be arranged many group monitoring wells, show to incline in Practical Project
Oblique angle is more appropriate within the scope of 20 ~ 40 degree, and service performance is preferable, also facilitates subsequent setting monitoring system, sensing in well
Device etc..
The bottom of wellhole is vertically lower than 1 ~ 3 meter of landfill yard bottom.The leakage of landfill yard can be all directions
, downward also have a probability, but monitoring well is arranged into the lower section of landfill yard and also less gears to actual circumstances, so can only deepen one
The depth of a little monitoring wells is to can monitor the waste liquid that some landfill yards leak downward.
Burying monitoring well step includes:
S21: one section of tubular silk screen 2 is set on one section of conduit 3, and the diameter of conduit 3 is less than monitoring well wellhole；
S22: one section of inner tube 5 is inserted into conduit 3 with one heart, as shown in fig. 6,5 surface of inner tube offers flowing hole 51；
S23: tubular silk screen 2, conduit 3, inner tube 5 are placed in monitoring well wellhole together；
S24: cobblestone is poured into monitoring well wellhole, outside silk screen 2 from earth's surface as cricoid outer layer filled layer 1, such as Fig. 7 institute
Show, one section in close earth's surface replaces cobblestone to be filled with annular air-pocket, and the lowest part of annular air-pocket is lower than local earth's surface
1 meter of water lowest water level or more；
S25: sandstone is poured into conduit 3, outside inner tube 5 from earth's surface as internal layer filled layer 4, is taken out on one side during toppling over
Conduit 3 is until internal layer filled layer 4 is filled to earth's surface out；
S26: several leakage sensors 7 are implanted into along 5 axis of inner tube.
As shown in figure 5, leakage could be identified by needing to be placed in monitoring system in monitoring well, it is some biographies that monitoring system is for example aforementioned
Sensor, the sensor in monitoring well recognize the water constituent concentration hair entered in waste liquid or original monitoring well in monitoring well
Change change, outside outgoing signal, and the selection of sensor is not belonging to the problem to be solved in the present invention, does not illustrate model in of the invention
In enclosing.It is to place the position of leakage sensors 7, and external effusion will pass through outer layer filled layer 1, internal layer is filled in inner tube 5
Layer 4 and flowing hole 51 are got to inside inner tube 5, and the filled layer of multilayer is to prevent soil sand grains to filter soil sand grains
It reaches and blocks flowing hole 51 at flowing hole 51, or enter inside inner tube 5, cause sediment siltation, influence Monitoring Performance, cobblestone
Sandstone filter effect is added to greatly increase；
Silk screen 2 between ectonexine filled layer 1 can maintain the form of ectonexine filled layer 1, prevent sandstone from rolling from internal layer filled layer 4
Out；And the setting of annular air-pocket is to obstruct surface water body, landfill yard is all outdoor, so rainy day is had certainly, rain
Water is absorbed after falling in earth's surface by topsoil, is flowed on the surface layer of soil, small part flow down enters underground water, and big
The water of amount is flow in neighbouring rivers as phreatic water, and the lowest part of rivers can be used as the local surface water of judgement most
Lower, the lowest part of annular air-pocket can stop to fall most surface water to enter monitoring well, prevent it lower than behind this position
Monitoring of structures is had an impact, or dilution is generated to leakage fluid, influences leak judgement.
Embedded monitoring well step further includes step S27: water absorption layer 6 is filled in inner tube 5.Frequent one layer of water in soil
Flowed to layer, so effusion also carries out lateral leakages to major part when landfill yard leaks, if leakage rate compared with
It is few, when reaching monitoring well, can be absorbed and conserved at a certain height by water absorption layer 6, can't in monitoring well lower resistance into
The movement of row short transverse also just improves monitoring well for the monitoring accuracy of short transverse.
Water absorption layer 6 is sponge.Sponge lightweight easy processing facilitates acquisition and forming, and water imbibition is more sufficient, is to carry out mistake above
The ideal material of journey.
Silk screen 2 has flange, and after silk screen 2 is placed in monitoring well wellhole, the flange of silk screen 2 is located at borehole bottom.Conduit 3 exists
When extraction, also may and then it be extracted because frictional force is larger with silk screen 2, the flange of silk screen 2 can be in withdrawal conduit 3
When prevent the race of silk screen 2 from offing normal and set because the cobblestone being first filled with can push down silk screen 2, In after silk screen 2 is positioned into monitoring well
Conduit 3 catches hold of silk screen 2 when extracting out.
It is greater than towards 51 closeness of side flowing hole of landfill yard away from the side of landfill yard in inner tube 5.51 court of flowing hole
Side closeness to landfill yard is larger, and it is more sensitive for the effusion that comes from landfill yard and stop also to allow for monitoring well
Fall some underground water in peripheral soil.
Inner tube 5 is well casing special PVC pipe.Monitoring well generally has more than ten meters, in the present invention because be it is tilting, length can
20 meters or more can be had, so inner tube 5 not will use a homogeneous tube substantially, because of transport inconvenience and processing inconvenience etc.
It is made into spliced with can be convenient, can be easily attached with clip, screw thread etc., and corrosion resistant Deng, well casing special PVC pipe
Corrosion is also preferable, light portable.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.
Claims (10)
1. a kind of landfill site seepage prevention system tracking and monitoring well, it is characterised in that: the landfill site seepage prevention system tracking and monitoring well exists
Landfill yard excircle is evenly distributed with several groups, includes the staggered monitoring well of two X-shapeds in every group of monitoring well, and monitoring well wellhole is interior along axis
Several leakage sensors (7) are arranged in direction.
2. a kind of landfill site seepage prevention system tracking and monitoring well according to claim 1, it is characterised in that: the monitoring well is also
Including outer layer filled layer (1), silk screen (2), conduit (3), internal layer filled layer (4), inner tube (5), the silk screen (2) is set in conduit
(3) on, said inner tube (5) is inserted into one heart in conduit (3), and inner tube (5) surface offers flowing hole (51), the monitoring well wellhole
Outer layer filled layer (1) is arranged in interior, silk screen (2) outside, and the conduit (3) is interior, internal layer filled layer (4) is arranged in inner tube (5) outside, described interior
Several leakage sensors (7) are set in the axial direction in pipe (5).
3. a kind of landfill site seepage prevention system tracking and monitoring well according to claim 2, it is characterised in that: said inner tube (5)
Middle filling water absorption layer (6).
4. a kind of landfill site seepage prevention system tracking and monitoring well according to claim 2, it is characterised in that: the outer layer filling
Layer (1) lower part is cobblestone, top is annular air-pocket.
5. a kind of landfill site seepage prevention system tracking and monitoring well according to claim 2, it is characterised in that: the silk screen (2)
With flange, after silk screen (2) are placed in monitoring well wellhole, the flange of silk screen (2) is located at borehole bottom；Court in said inner tube (5)
It is greater than to side flowing hole (51) closeness of landfill yard away from the side of landfill yard, inner tube (5) is well casing special PVC pipe.
6. a kind of method for arranging of landfill site seepage prevention system tracking and monitoring well, it is characterised in that: the landfill site seepage prevention system with
Track monitoring well method for arranging includes monitoring well wellbore drilling step and embedded monitoring well step.
7. a kind of landfill site seepage prevention system tracking and monitoring well method for arranging according to claim 6, it is characterised in that: described
Monitoring well wellbore drilling step includes:
S11: two are drilled through outside landfill yard profile with the staggered monitoring well wellhole of X-shaped, the axis of two wellholes and vertical side
To at an equal acute angle；
S12: repeating S11, uniformly drill through several groups wellhole in landfill yard profile outer circle circumferential direction, until wellhole is for landfill yard
Cornerite summation is greater than 240 °.
8. a kind of landfill site seepage prevention system tracking and monitoring well method for arranging according to claim 6, it is characterised in that: described
Burying monitoring well step includes:
S21: one section of tubular silk screen (2) is set on one section of conduit (3), and the diameter of the conduit (3) is less than monitoring well wellhole；
S22: one section of inner tube (5) is inserted into one heart in conduit (3), said inner tube (5) surface offers flowing hole (51)；
S23: tubular silk screen (2), conduit (3), inner tube (5) are placed in monitoring well wellhole together；
S24: cobblestone is poured into as cricoid outer layer filled layer (1), In in monitoring well wellhole, outside silk screen (2) from earth's surface
One section close to earth's surface replaces cobblestone to be filled with annular air-pocket, and it is minimum that the lowest part of annular air-pocket is lower than local surface water
1 meter of water level or more；
S25: sandstone is poured into conduit (3), outside inner tube (5) as internal layer filled layer (4), during toppling over from earth's surface
One side withdrawal conduit (3) is until internal layer filled layer (4) are filled to earth's surface；
S26: several leakage sensors (7) are implanted into along inner tube (5) axis.
9. a kind of landfill site seepage prevention system tracking and monitoring well method for arranging according to claim 7, it is characterised in that: described
Borehole axis and acute angle formed by vertical direction are 20 ~ 40 degree in step S11.
10. a kind of landfill site seepage prevention system tracking and monitoring well method for arranging according to claim 9, it is characterised in that: institute
The bottom for stating wellhole is vertically lower than 1 ~ 3 meter of landfill yard bottom.
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| CN110441208B (en) | 2020-06-26 |
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| CN111705848A (en) | 2020-09-25 |
| CN111705849A (en) | 2020-09-25 |
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