CN106192971A - A kind of artesian water water-level observation well construction and the method for multilamellar water-level observation - Google Patents
A kind of artesian water water-level observation well construction and the method for multilamellar water-level observation Download PDFInfo
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- CN106192971A CN106192971A CN201610735751.7A CN201610735751A CN106192971A CN 106192971 A CN106192971 A CN 106192971A CN 201610735751 A CN201610735751 A CN 201610735751A CN 106192971 A CN106192971 A CN 106192971A
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Abstract
The present invention relates to a kind of artesian water water-level observation well construction and multilamellar water level observation procedure.Described water-level observation well construction is made up of peephole and the well casing being placed in outside peephole, and in peephole coring to artesian aquifer, well casing is placed in the sealing layer above artesian aquifer, just the water level in Observable artesian aquifer；When needing the water level observing lower floor's artesian aquifer, continue to hole to lower floor's artesian aquifer in being only used in peephole, and between peephole and well casing, insert two layers of artesian aquifer water-level observation well casing.The present invention can observe the water level elevation of artesian water and the pressure head of more than two-layer or two-layer at inspection well, its well casing sidewall need not backfill filtrate and clay ball, save construction costs, be also not required to make filter tube, reduce the mud impact on water-level observation result in hole.
Description
Technical field
The present invention relates to engineering geological investigation and Hydrogeologic Survey field, specifically a kind of acquisition underground bearing water
The artesian water water-level observation well construction of water level and the method for multilamellar water-level observation, be mainly used in finding out place hydrogeologic condition,
Offer parameter is checked for anti-prominent the gushing of foundation ditch.
Background technology
When carrying out engineering geological investigation and Hydrogeologic Survey in all kinds of engineering projects, relate to excavation of foundation pit, need to look into
Artesian water water level elevation and pressure head in light field ground, check offer parameter for anti-prominent the gushing of foundation ditch.Place artesian water water level elevation
And the acquisition of pressure head typically takes following methods:
Well-site measurement → rig pore-forming → well-flushing → well casing fabrication and installation → well casing sidewall filtrate and clay ball backfilling → wash
Well and test are drawn water → artesian water water-level observation → tube drawing sealing of hole.
There is following two defect in existing method:
1, the method can only observe the water level of an artesian aquifer, and there are two artesian aquifers in place needs observation
During artesian water water level, needing to make two groups of inspection wells, construction costs is higher.
2, in place of the key of the method being well-flushing, the purpose of well-flushing is to reduce clay particle in mud to be attached to the mistake of well casing
On chimney filter, block well casing.Once in mud, clay particle is attached on the filter tube of well casing in a large number, and well casing blocks, water-level observation
Result distortion.
The utility model patent " multilamellar water level observation well structure " of Publication No. CN204941526U discloses one and can fit
The water-level observation well construction simultaneously observed for narrow field multilamellar water layer, although this structure can realize to digging one group of observation
Multilamellar water level just can be measured by well, but the observation of lower floor's water level is the mode using and burying sensor underground, cumbersome, water
The accuracy that position is measured is the highest；And upper strata level measuring still uses the mode of filter tube, still can't resolve filter tube
The problem of blocking.
For these reasons, a kind of artesian water water level can observed two-layer artesian water water level and need not filter tube is invented
Inspection well, has practical value widely.
Summary of the invention
The invention aims to overcome the deficiency of above-mentioned background technology, it is provided that a kind of artesian water water-level observation well construction
And the method for multilamellar water-level observation, utilize this water-level observation structure can facilitate, record holding of more than two-layer or two-layer accurately
The water level elevation of setting-out and pressure head.
The present invention provides a kind of artesian water water-level observation well construction, it is characterised in that: this inspection well structure include well casing and
The peephole being drilled with in well casing, in described peephole coring to artesian aquifer, described well casing is seamless metal pipe,
After peephole has been constructed, directly in earth's surface press-in soil layer, its bottom is stretched on the artesian aquifer at place, peephole bottom surface
In the sealing layer of side, the top of described well casing is higher than the upper port of peephole.
The further technical scheme of the present invention: described inspection well structure also includes for observing below artesian aquifer two layers
Two layers of water-level observation well casing of artesian aquifer and two layers of water-level observation hole, described two layers of water-level observation well casing be placed in peephole with
Between well casing, for seamless metal pipe, and bottom is stretched in the second sealing layer above two layers of artesian aquifer, and top is higher than well casing
Top；Described two layers of water-level observation hole are drilled with in the bottom surface of peephole, and coring is in two layers of artesian aquifer.
The present invention preferably technical scheme: the bottom of described well casing is placed in the position of the above 2m-3m of artesian aquifer end face；
Described peephole coring is to the position of 1m-2m below artesian aquifer end face.The bottom of described two layers of water-level observation well casing is placed in
The position of two layers of above 2m-3m of artesian aquifer end face；Two layers of artesian aquifer end face of described two layers of water-level observation hole coring with
The position of lower 1m-2m.
The present invention preferably technical scheme: described well casing and two layers of water-level observation well casing all use multistage wall thickness to be 2mm's
Seamless steel pipe is threaded to be formed；Described well casing exceeds peephole aperture 10-20cm, and two layers of water-level observation well casing exceed well casing
Mouth of pipe 10-20cm.
The method of a kind of multilamellar water-level observation that the present invention provides, it is characterised in that specifically comprise the following steps that
(1) well location laid by inspection well arrangement and method for construction measures unwrapping wire；
(2) according to place survey data or distance inspection well 1-3m in the range of boring and coring, confirm artesian aquifer with
The spatial distribution characteristic of sealing layer；
(3) at the well location laid, peephole is offered, in peephole coring to ground floor artesian aquifer；
(4) according to the buried depth of ground floor artesian aquifer, ground floor artesian aquifer water-level observation well casing, institute are prepared
Stating ground floor artesian aquifer water-level observation well casing and use that multistage seamless steel pipe is threaded forms, its diameter is straight more than peephole
Footpath, by ground floor artesian aquifer water level observation well pipe box outside peephole, the hole heart of its die alignment peephole, and use hammer
Hitting mode injection in the impermeable stratum sealing layer above ground floor artesian aquifer, the upper end of well casing exceeds the hole of peephole
Mouthful；
(5) peephole is carried out well-flushing, the mud in displacement peephole, and test the inspection well washing effect that draws water, to be extracted
Subsoil water become limpid from muddiness, reached observation when requiring, completed well-flushing work；
(6) after test is drawn water and is stopped, the aperture elevation of repetition measurement peephole, and measure observation well casing end face to peephole aperture
Distance, and use lining rope, to observe well casing end face as reference frame, start to observe the water level of ground floor artesian aquifer.Typically
After stopping pumping the 5th, 10,15,20,25,30min respectively survey a water level, the most every 30min or 60min surveys once, during observation
Between no less than 24h, and hourly observation time and the relation curve of water level in observation process, treat that this relation curve is only certain
In the range of fluctuation and stop observation when the most persistently rising or falling trend, and determine the water level of ground floor artesian aquifer；
(7) after the water-level observation of ground floor artesian aquifer is complete, boring is continued in the bottom surface of peephole to the second layer
In artesian aquifer；
(8) according to the buried depth of second layer artesian aquifer, second layer artesian aquifer water-level observation well casing is prepared, the
Two layers of artesian aquifer water-level observation well casing are also adopted by that multistage seamless steel pipe is threaded to be formed, and its diameter is straight more than peephole
Footpath, less than ground floor artesian aquifer water-level observation well casing diameter；Second layer artesian aquifer water-level observation well casing is placed in
Between one layer of artesian aquifer water-level observation well casing and peephole, and die is directed at the hole heart of peephole, uses hammer mode
Injection is in the impermeable stratum above second layer artesian aquifer, and the upper end of well casing exceeds ground floor artesian aquifer observation well casing
The mouth of pipe；
(9) step (5) and step (6) are repeated, the water level of observation second layer artesian aquifer；
(10), after the water-level observation of second layer artesian aquifer completes, all well casings are depended on by the order that diameter is ascending
Secondary extract, and the method using clay ball backfilling to consolidate carries out sealing of hole to peephole, or repeat step (7) and carry out next to (9)
After layer artesian aquifer water-level observation, more all well casings are extracted successively by the order that diameter is ascending, use clay ball to return
The method filling out tamping carries out sealing of hole to peephole.
The present invention preferably technical scheme: the bottom of every layer of well casing is placed in the position of surveyed artesian aquifer top face 2-3m
Put；The bottom surface of every layer of peephole is placed in the position of 1-2m below surveyed artesian aquifer end face.
The present invention preferably technical scheme: offering of described peephole is to use the mode of percussion drilling or rotary drilling complete
Become.
The present invention preferably technical scheme: the well-flushing work described in step (5) uses and inspection well well casing diameter phase
The deep well submerged pump of coupling carries out well-flushing, the deep well submerged pump that model can be used to be 89QJ-3 type.
The present invention preferably technical scheme: described ground floor artesian aquifer water-level observation well casing exceeds peephole aperture
10-20cm, every layer of water-level observation well casing all exceeds adjacent outward layer well casing mouth of pipe 10-20cm afterwards.
The present invention preferably technical scheme: described outermost layer observation well casing diameter is more than peephole diameter 19-60mm.
Beneficial effects of the present invention:
(1) inspection well simple in construction of the present invention, it is not necessary to make chimney filter, it is to avoid cause because of chimney filter blocking
The problem such as observed result is inaccurate, reduce the mud impact on water-level observation result；
(2) present invention both can observe water level elevation and the pressure head of one layer of artesian water, it is also possible to observation multilamellar pressure-bearing
The water level elevation of water and pressure head, and well casing sidewall need not backfill filtrate and clay ball, saves construction costs.
Present configuration is simple, easy construction, with low cost, only just can observe multilamellar with one hole of brill simultaneously hold
The water level elevation in pressure water-bearing layer and pressure head, and observation is accurately, can be widely applied to engineering geological investigation and hydrogeology
In prospecting.
Accompanying drawing illustrates:
Fig. 1 is the schematic diagram of inspection well structure in the present invention；
Fig. 2 is the A-A ' sectional view of Fig. 1；
Fig. 3 is the B-B ' sectional view of Fig. 1；
Fig. 4 is the inspection well structural representation observing ground floor pressure water head in embodiment；
Fig. 5 is the inspection well structural representation observing second layer pressure water head in embodiment.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.A kind of pressure-bearing as shown in Figure 1, Figure 2 and Figure 3
Water water-level observation well construction, including well casing 1 and the peephole 2 that is drilled with in well casing 1, described peephole 2 coring is to pressure-bearing
The position of 1-2 rice in water-bearing layer 3, described well casing 1 is seamless steel pipe, and the seamless steel pipe using multistage wall thickness to be 2mm is threaded
Forming, its diameter is more than peephole 2 diameter 19-60mm, and peephole of first constructing, after having constructed in hole to be observed, by well casing 1
Center is directed at the center of peephole, and then directly in earth's surface press-in soil layer, holding of place, peephole 2 bottom surface is stretched in its bottom
In sealing layer 4 above pressure water-bearing layer 3, the generally greater than position of artesian aquifer 3 end face 2-3m, can by sealing layer 4 only
Water, the top of described well casing 1 is higher than upper port 10-20cm of peephole 2, it is to avoid the aperture of the highest peephole 2 of gushing out of water level.Should
After part inspection well structure construction completes, just can there is the water level starting to observe artesian aquifer 3.
As shown in Figure 1, Figure 2 and Figure 3, if needing to continue observation lower floor artesian aquifer water level, just tie at this inspection well
Continuing on structure constructs is used for observing two layers of water-level observation well casing 5 of two layers of artesian aquifer 7 below artesian aquifer 3 and two layers of water
Position peephole 6, described two layers of water-level observation well casing 5 are seamless metal pipe, are also adopted by the seamless steel pipe screw thread that multistage wall thickness is 2mm
Being formed by connecting, two layers of water-level observation well casing 5, more than the diameter of peephole 2, less than the diameter of well casing 1, are placed in observation by its diameter
Between hole 2 and well casing 1, the die of its well casing 5 is directed at the hole heart of peephole 2, and the bottom of two layers of water-level observation well casing 5 stretches into two
In the second sealing layer 8 above layer artesian aquifer 7, top is higher than the top 10-20cm of well casing 1；Described two layers of water-level observation
Hole 6 is drilled with in the bottom surface of peephole 2, and coring is to the position of 1-2 rice in two layers of artesian aquifer 7.
Embodiment, with iron and steel base, Baosteel Zhanjiang hydrogeology special project prospecting project for observation project, surveys according to place
Data confirms that this exploration project includes two-layer underground artesian aquifer, has sealing layer, and determine two above every layer of artesian aquifer
The degree of depth of layer artesian aquifer, after determining the artesian aquifer spatial distribution characteristic with sealing layer, starts construction, its construction
Specifically comprise the following steps that
(1) well location laid by inspection well arrangement and method for construction measures unwrapping wire；
(2) using slewing drilling machine to turn round pore-forming at the well location laid, bore diameter is 108mm, boring and coring to first
Below the end face of layer artesian aquifer 9, the position of 1m, completes the construction of ground floor artesian aquifer water-level observation hole 9-1；
(3) according to the buried depth of ground floor artesian aquifer, ground floor artesian aquifer water-level observation well casing 9-is prepared
2, this well casing is to be 146mm by multistage external diameter, and the seamless steel pipe of wall thickness 2mm is formed by connecting by threaded sleeve, and its length determines
Can extend into ground floor artesian aquifer 9 top face 2m position, top can exceed ground floor artesian aquifer water-level observation
9-1 aperture, hole 10-20cm；Then the die of ground floor artesian aquifer water-level observation well casing 9-2 is directed at ground floor pressure-bearing to contain
The hole heart of water layer water-level observation hole 9-1, and use hammer mode injection to the position of the ground floor above 2m of artesian aquifer top board,
And utilize the first sealing layer 10 sealing (as shown in Figure 4)；
(4) 89QJ-3 type deep-well immersible pump is put into ground floor artesian aquifer water-level observation hole 9-1 it is washed
Well, mud in displacement hole, and test are drawn water, and subsoil water to be extracted is become limpid from muddiness, stop test and draw water；
(5), after termination of pumping is drawn water in test, test is drawn water after stopping, the aperture elevation of repetition measurement peephole, and measures observation well casing
End face is to the distance in peephole aperture, and uses lining rope, to observe well casing end face as reference frame, starts to observe ground floor pressure-bearing and contains
The water level of water layer；After stopping pumping the 5th, 10,15,20,25,30min respectively survey a water level, the most every 60min surveys once, sees
The survey time is no less than 24h, and hourly observation time and the relation curve of water level in observation process, treats that this relation curve is only one
Stop observation when fluctuating in fixed scope and the most persistently rise or fall trend, determine the water level of ground floor artesian aquifer；
(6) after the water-level observation of ground floor artesian aquifer is complete, rig machinery rotation pore-forming in situ, holds at ground floor
Continuing to hole to second layer artesian aquifer 11 in the bottom surface of pressure water-bearing layer water level peephole 9-1, forms second layer pressure-bearing aqueous
Layer water-level observation hole 11-1, its aperture is 90mm；
(7) according to the buried depth of second layer artesian aquifer, second layer artesian aquifer water-level observation well casing 11-is prepared
2, this well casing is to be 130mm by multistage external diameter, and the seamless steel pipe of wall thickness 2mm is formed by connecting by threaded sleeve, and its length determines
Can extend into second layer artesian aquifer 11 top face 2m position, top can exceed ground floor artesian aquifer water-level observation
The mouth of pipe 10-20cm of well casing 9-2；Then the die of second layer artesian aquifer water-level observation well casing 11-2 is directed at ground floor to hold
The hole heart of pressure water-bearing layer water level peephole 9-1, and use hammer mode injection to the second layer above 2m's of artesian aquifer top board
Position, and utilize the second sealing layer 12 sealing (as shown in Figure 5)；
(8) step (4) and step (5) are repeated, the water level of observation second layer artesian aquifer 11；
(9), after the water-level observation of second layer artesian aquifer 11 completes, all well casings are pressed the order that diameter is ascending
Extract successively, and the method using clay ball backfilling to consolidate carries out sealing of hole to peephole.
By the analysis of observed result and detection are proved that the observing buoy using the present invention to be obtained is true and reliable.
Those skilled in the art the present invention can be carried out various change and modification without deviating from the present invention spirit and
Scope.So, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof,
Then the present invention is also intended to comprise these change and modification.
Claims (10)
1. an artesian water water-level observation well construction, it is characterised in that: this inspection well structure includes well casing (1) and in well casing (1)
The peephole (2) being inside drilled with, in described peephole (2) coring to underground reservoir (3), described well casing (1) is seamless gold
Belonging to pipe, after peephole (2) has been constructed, directly in earth's surface press-in soil layer, peephole (2) place, bottom surface is stretched in its bottom
In the sealing layer (4) of artesian aquifer (3) top, the top of described well casing (1) is higher than the upper port of peephole (2).
A kind of artesian water water-level observation well construction the most according to claim 1, it is characterised in that: described inspection well structure is also
Including for observing artesian aquifer (3) lower section two layers of water-level observation well casing (5) of two layers of artesian aquifer (7) and two layers of water level
Peephole (6), described two layers of water-level observation well casing (5) are placed between peephole (2) and well casing (1), for seamless metal pipe, and the end
End stretches in the second sealing layer (8) of two layers of artesian aquifer (7) top, and top is higher than the top of well casing (1)；Described two layers of water
Position peephole (6) is drilled with in the bottom surface of peephole (2), and coring is interior to two layers of artesian aquifer (7).
3. according to a kind of artesian water water-level observation well construction shown in claim 2, it is characterised in that: the end of described well casing (1)
End is placed in the position of the above 2m-3m of artesian aquifer (3) end face；Described peephole (2) coring to artesian aquifer (3) end face with
The position of lower 1m-2m；The bottom of described two layers of water-level observation well casing (5) is placed in two layers of artesian aquifer (7) above 2m-3m of end face
Position；The position of 1m-2m below described two layers of artesian aquifer (7) end face of two layers of water-level observation hole (6) coring.
4. according to a kind of artesian water water-level observation well construction shown in claim 2, it is characterised in that: described well casing (1) and two
Layer water-level observation well casing (5) seamless steel pipe that all uses multistage wall thickness to be 2mm is threaded to be formed；Described well casing (1) exceeds sight
Gaging hole (2) aperture 10cm-20cm, two layers of water-level observation well casing (5) exceed the mouth of pipe 10cm-20cm of well casing (1).
5. the method for a multilamellar water-level observation, it is characterised in that specifically comprise the following steps that
(1) well location laid by inspection well arrangement and method for construction measures unwrapping wire；
(2) survey data or at boring and coring in the range of inspection well 1m-3m according to place, confirm artesian aquifer and sealing
The spatial distribution characteristic of layer；
(3) at the well location laid, peephole is offered, in peephole coring to ground floor artesian aquifer；
(4) according to the buried depth of ground floor artesian aquifer, ground floor artesian aquifer water-level observation well casing is prepared, described the
One layer of artesian aquifer water-level observation well casing uses that multistage seamless steel pipe is threaded to be formed, and its diameter is more than peephole diameter,
And using hammer mode injection in the sealing layer above ground floor artesian aquifer, the upper end of well casing exceeds the hole of peephole
Mouthful；
(5) peephole is carried out well-flushing, the mud in displacement peephole, and test the inspection well washing effect that draws water, ground to be extracted
Lower water is become limpid from muddiness, completes well-flushing work；
(6) test draw water stopping after, the aperture elevation of repetition measurement peephole, and measure observation well casing end face to peephole aperture away from
From, and use lining rope, to observe well casing end face as reference frame, start to observe the water level of ground floor artesian aquifer；
(7) after the water-level observation of ground floor artesian aquifer is complete, boring is continued in the bottom surface of peephole to second layer pressure-bearing
In water-bearing layer；
(8) according to the buried depth of second layer artesian aquifer, second layer artesian aquifer water-level observation well casing, the second layer are prepared
Artesian aquifer water-level observation well casing is also adopted by that multistage seamless steel pipe is threaded to be formed, and its diameter is more than peephole diameter, little
In ground floor artesian aquifer water-level observation well casing diameter；And use hammer mode injection to above second layer artesian aquifer
In sealing layer, the upper end of well casing exceeds the mouth of pipe of ground floor artesian aquifer observation well casing；
(9) step (5) and step (6) are repeated, the water level of observation second layer artesian aquifer；
(10), after the water-level observation of second layer artesian aquifer completes, all well casings are pulled out successively by the order that diameter is ascending
Go out, and the method using clay ball backfilling to consolidate carries out sealing of hole to peephole, or repetition step (7) to (9) carries out next layer and holds
After pressure water-bearing layer water-level observation, more all well casings are extracted successively by the order that diameter is ascending, use clay ball backfilling to smash
Real method carries out sealing of hole to peephole.
The method of a kind of multilamellar water-level observation the most according to claim 5, it is characterised in that: the bottom of every layer of well casing is placed in
The position of surveyed artesian aquifer top face 2m-3m；The bottom surface of every layer of peephole is placed in below surveyed artesian aquifer end face
The position of 1m-2m.
The method of a kind of multilamellar water-level observation the most according to claim 5, it is characterised in that: offering of described peephole is
The mode using percussion drilling or rotary drilling completes.
The method of a kind of multilamellar water-level observation the most according to claim 5, it is characterised in that: described in step (5)
Well-flushing work uses the deep well submerged pump matched with inspection well well casing diameter to carry out well-flushing.
The method of a kind of multilamellar water-level observation the most according to claim 5, it is characterised in that: described ground floor pressure-bearing is aqueous
Layer water-level observation well casing exceeds peephole aperture 10-20cm, and every layer of water-level observation well casing all exceeds adjacent outward layer well casing pipe afterwards
Mouth 10-20cm.
The method of a kind of multilamellar water-level observation the most according to claim 5, it is characterised in that: described outermost layer inspection well
Pipe diameter is more than peephole diameter 19-60mm.
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| CN109458128A (en) * | 2018-11-30 | 2019-03-12 | 中国电建集团成都勘测设计研究院有限公司 | For being layered drilling and its observation structure of water-level observation |
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