CN205999876U - A kind of artesian water water-level observation well construction - Google Patents

A kind of artesian water water-level observation well construction Download PDF

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Publication number
CN205999876U
CN205999876U CN201620953996.2U CN201620953996U CN205999876U CN 205999876 U CN205999876 U CN 205999876U CN 201620953996 U CN201620953996 U CN 201620953996U CN 205999876 U CN205999876 U CN 205999876U
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water
artesian
well casing
peephole
well
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张大磊
叶东方
杜坤乾
李国祥
赵建海
郭景华
王国辉
马建军
黄静
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Wuhan Surveying Geotechnical Research Institute Co Ltd of MCC
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Wuhan Surveying Geotechnical Research Institute Co Ltd of MCC
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Abstract

This utility model is related to a kind of artesian water water-level observation well construction.Described water-level observation well construction is made up of with the well casing being placed in outside peephole 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, it is only used in observation in the hole and continues boring to lower floor's artesian aquifer, and insert two layers of artesian aquifer water-level observation well casing between peephole and well casing.This utility model can observe the water level elevation of artesian water and the pressure head of more than two-layer or two-layer in inspection well, its well casing side wall does not need to backfill filtrate and clay ball, save construction costs, be also not required to make filter tube, reduce the impact to water-level observation result for the in the hole mud.

Description

A kind of artesian water water-level observation well construction
Technical field
This utility model is related to engineering geological investigation and Hydrogeologic Survey field, and specifically a kind of underground that obtains is held The pressure artesian water water-level observation well construction of water water level and the method for multilamellar water-level observation, are mainly used in finding out place hydrogeology bar Part, resists prominent gushing to check offer parameter for foundation ditch.
Background technology
When carrying out engineering geological investigation and Hydrogeologic Survey in all kinds of engineering projects, it is related to excavation of foundation pit, needs to look into Artesian water water level elevation and pressure head in light field ground, resist prominent gushing to check offer parameter for 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 side wall filtrate and clay ball backfilling → wash Well and test are drawn water → artesian water water-level observation → tube drawing sealing of hole.
There are following two defects in existing method:
1st, the method can only observe the water level of an artesian aquifer, and there are two artesian aquifers in place needs to observe During artesian water water level, need to make two groups of inspection wells, construction costs is higher.
2nd, the crucial part of the method is well-flushing, and the purpose of well-flushing is to reduce the mistake that clay particle in mud is attached to well casing On chimney filter, block well casing.Once clay particle is attached on the filter tube of well casing in a large number in mud, well casing blocks, water-level observation Result distortion.
The utility model patent " multilamellar water-level observation well construction " of Publication No. CN204941526U discloses one kind and can fit The water-level observation well construction simultaneously observed for narrow field multilamellar water layer, although this structure can be realized to digging one group of observation Well just can measure to multilamellar water level, but the observation of lower floor's water level is cumbersome, water by the way of embedded sensor The accuracy of position measurement is not also high;And upper strata level measuring is still by the way of filter tube, still can't resolve filter tube The problem of blocking.
For these reasons, invent a kind of artesian water water level that can observe two-layer artesian water water level and not need filter tube Inspection well, has extensive practical value.
Content of the invention
The purpose of this utility model is to overcome the shortcomings of above-mentioned background technology, providing a kind of artesian water water level observation well Structure, can facilitate, accurately record using this water-level observation structure the artesian water of more than two-layer or two-layer water level elevation and Pressure head.
This utility model provide a kind of artesian water water-level observation well construction it is characterised in that:This observation well construction includes well Pipe and the peephole being drilled with well casing, to artesian aquifer, described well casing is seamless metal to described peephole coring Pipe, after the completion of peephole construction, directly in earth's surface press-in soil layer, the pressure-bearing that peephole bottom surface place is stretched in its bottom is aqueous In the sealing layer of layer top, the top of described well casing is higher than the upper port of peephole.
The further technical scheme of this utility model:Described observation well construction is also included for observing below artesian aquifer Two layers of water-level observation well casing of two layers of artesian aquifer and two layers of water-level observation hole, described two layers of water-level observation well casing are placed in observation Between hole and well casing, it is seamless metal pipe, and bottom is stretched in the second sealing layer above two layers of artesian aquifer, top is higher than The top of well casing;Described two layers of water-level observation hole are drilled with the bottom surface of peephole, and coring is to two layers of artesian aquifer.
This utility model preferably technical scheme:The bottom of described well casing is placed in the above 2m-3m's of artesian aquifer top surface Position;The position of described peephole coring 1m-2m to artesian aquifer top surface.The bottom of described two layers of water-level observation well casing It is placed in the position of the above 2m-3m of two layers of artesian aquifer top surface;Two layers of artesian aquifer top of described two layers of water-level observation hole coring The position of 1m-2m below face.
This utility model preferably technical scheme:Described well casing and two layers of water-level observation well casing using multistage wall thickness are all The seamless steel pipe of 2mm is threaded to be formed;Described well casing exceeds peephole aperture 10cm-20cm, and two layers of water-level observation well casing are high Go out the mouth of pipe 10cm-20cm of well casing.
This utility model preferably technical scheme:Described well casing is with diameter greater than observation bore dia 19-60mm.
The method of water-level observation is carried out it is characterised in that comprising the following steps that using structure of the present utility model:
(1) measure unwrapping wire by the well location that inspection well arrangement and method for construction is laid;
(2) data is surveyed or in boring and coring in the range of inspection well 1-3m according to place, confirm artesian aquifer with The spatial distribution characteristic of sealing layer;
(3) open up peephole at the well location laid, in peephole coring to ground floor artesian aquifer;
(4) buried depth according to ground floor artesian aquifer, prepares ground floor artesian aquifer water-level observation well casing, institute State ground floor artesian aquifer water-level observation well casing to form using multistage seamless steel pipe is threaded, have a diameter larger than peephole straight Footpath, by ground floor artesian aquifer water level observation well pipe box outside peephole, its die is directed at the hole heart of peephole, and using hammer Hit in the sealing layer to above ground floor artesian aquifer for the mode injection, the upper end of well casing exceeds the aperture of peephole;
(5) peephole is carried out with well-flushing, the mud of displacement observation in the hole, and tests the inspection well washing effect that draws water, to be extracted Subsoil water be changed into 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 top surface to peephole aperture Distance, and adopt lining rope, to observe well casing top surface as reference frame, start to observe the water level of ground floor artesian aquifer.Typically The 5th after stopping pumping, 10,15,20,25,30min respectively survey a water level, every 60min surveys once later, and observation time is many In 24h, and hourly observation time and the relation curve of water level in observation process, treat this relation curve only in certain scope Fluctuate and persistently do not rise or fall and stop observation during trend, and determine the water level of ground floor artesian aquifer;
(7) after the water-level observation of ground floor artesian aquifer is complete, continue boring to the second layer in the bottom surface of peephole In artesian aquifer;
(8) buried depth according to second layer artesian aquifer, prepares second layer artesian aquifer water-level observation well casing, 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 have a diameter larger than peephole straight Footpath, less than ground floor artesian aquifer water level observation well pipe 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 hollow of peephole, using hammer mode In the sealing layer to above second layer artesian aquifer for the injection, the upper end of well casing exceeds ground floor artesian aquifer and observes well casing The mouth of pipe;
(9) repeat step (5) and step (6), the water level of observation second layer artesian aquifer;
(10) after the completion of the water-level observation of second layer artesian aquifer, by all well casings press the ascending order of diameter according to Secondary extract, and sealing of hole is carried out to peephole using the method for clay ball backfilling tamping, or repeat step (7) carries out next to (9) After layer artesian aquifer water-level observation, more all well casings are extracted successively by the ascending order of diameter, returned using clay ball Fill out tamping and sealing of hole is carried out to peephole.
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 It is placed in the position of 1m-2m below surveyed artesian aquifer top surface.
Opening up of described peephole is to be completed by the way of percussion drilling or rotary drilling.
Well-flushing work described in step (5) is washed using the deep well submerged pump being equipped with inspection well well casing diameter phase Well, can adopt the deep well submerged pump of model 89QJ-3 type.
Described ground floor artesian aquifer water-level observation well casing exceeds peephole aperture 10-20cm, and every layer of water level is seen afterwards Well logging Guan Jun exceeds adjacent outward layer well casing mouth of pipe 10-20cm.
The beneficial effects of the utility model:
(1) observation well construction described in the utility model simple it is not necessary to make chimney filter, it is to avoid because chimney filter blocking and The problems such as observed result that causes is inaccurate, reduces the impact to water-level observation result for the mud;
(2) this utility model both can observe the water level elevation of one layer of artesian water and pressure head it is also possible to observation multilamellar The water level elevation of artesian water and pressure head, and well casing side wall does not need to backfill filtrate and clay ball, saving construction costs.
This utility model structure is simple, easy construction, with low cost, can only just can be observed many with one hole of brill simultaneously The water level elevation of layer artesian aquifer and pressure head, and observe accurately, can be widely applied to engineering geological investigation and the hydrology In geological mapping.
Brief description:
Fig. 1 is the schematic diagram observing well construction in this utility model;
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.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.One kind as shown in Figure 1, Figure 2 and Figure 3 Artesian water water-level observation well construction, the peephole 2 being drilled with including well casing 1 and in well casing 1, described peephole 2 coring is extremely The position of 1-2m in artesian aquifer 3, described well casing 1 is seamless steel pipe, and the seamless steel pipe screw thread being 2mm using multistage wall thickness is even Connect and form, have a diameter larger than peephole 2 diameter 19-60mm, peephole of constructing first, after the completion of the construction of hole to be observed, by well casing 1 Center be aligned with the center of peephole, then directly from earth's surface press-in soil layer in, its bottom stretch into peephole 2 bottom surface place In the sealing layer 4 of artesian aquifer 3 top, the generally greater than position of artesian aquifer 3 top surface 2-3m, sealing layer 4 can be passed through Sealing, 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 too high peephole 2 of gushing out of water level. After the completion of this part inspection well structure construction, just can there is the water level starting to observe artesian aquifer 3.
As shown in Figure 1, Figure 2 and Figure 3, if necessary to continue observation lower floor artesian aquifer water level, just tie in this inspection well Construction is continued on structure for observing two layers of water-level observation well casing 5 of two layers of artesian aquifer 7 and two layers of water below artesian aquifer 3 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 It is formed by connecting, has a diameter larger than the diameter of peephole 2, less than the diameter of well casing 1, two layers of water-level observation well casing 5 are placed in observation Between hole 2 and well casing 1, the die of its well casing 5 is aligned with the hole heart of peephole 2, and the bottom of two layers of water-level observation well casing 5 stretches into two In second sealing layer 8 of layer artesian aquifer 7 top, top is higher than the top 10-20cm of well casing 1;Described two layers of water-level observation Hole 6 is drilled with 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 Baosteel Zhanjiang iron and steel base hydrogeology special project prospecting project for observing project, surveys according to place Data confirms that this exploration project, from including two-layer underground artesian aquifer, has sealing layer, and determines above every layer of artesian aquifer The depth of two-layer artesian aquifer, after determining the spatial distribution characteristic that artesian aquifer is with sealing layer, starts to construct, it is applied The comprising the following steps that of work:
(1) measure unwrapping wire by the well location that inspection well arrangement and method for construction is laid;
(2) slewing drilling machine is adopted to turn round pore-forming at the well location laid, bore diameter is 108mm, boring and coring to first Below the top surface of layer artesian aquifer 9, the position of 1m, completes the construction of ground floor artesian aquifer water-level observation hole 9-1;
(3) buried depth according to ground floor artesian aquifer, prepares ground floor artesian aquifer water-level observation well casing 9- 2, this well casing is to be 146mm by multistage external diameter, the seamless steel pipe that the seamless steel pipe of wall thickness 2mm connects by threaded sleeve, and it is grown Degree is determined to stretch into ground floor artesian aquifer 9 top 2m position, and top can exceed ground floor artesian aquifer water level and see Gaging hole 9-1 aperture 10-20cm;Then the die of ground floor artesian aquifer water-level observation well casing 9-2 is directed at ground floor pressure-bearing The hole heart of water-bearing layer water level peephole 9-1, and the position using hammer mode injection to the above 2m of ground floor artesian aquifer top board Put, and utilize the first sealing layer 10 sealing (as shown in Figure 4);
(4) 89QJ-3 type deep-well immersible pump is put in ground floor artesian aquifer water-level observation hole 9-1 and it is washed Well, replaces in the hole mud, and tests and draw water, subsoil water to be extracted is changed into limpid from muddiness, stops test and draws 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 Top surface, to the distance in peephole aperture, and adopts lining rope, to observe well casing top surface as reference frame, starts to observe ground floor pressure-bearing and contains The water level of water layer;The 5th after stopping pumping, 10,15,20,25,30min respectively survey a water level, every 30min or 60min surveys later Once, observation time is no less than 24h, and hourly observation time and the relation curve of water level in observation process, treats that this relation is bent Stop observation when line fluctuates and persistently do not rise or fall trend only in certain scope, determine ground floor artesian aquifer Water level;
(6) after the water-level observation of ground floor artesian aquifer is complete, rig original position machinery rotation pore-forming, holds in ground floor Boring is continued 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) buried depth according to second layer artesian aquifer, prepares second layer artesian aquifer water-level observation well casing 11- 2, this well casing is to be 130mm by multistage external diameter, the seamless steel pipe that the seamless steel pipe of wall thickness 2mm connects by threaded sleeve, and it is grown Degree is determined to stretch into second layer artesian aquifer 11 top 2m position, and top can exceed ground floor artesian aquifer water level and see The mouth of pipe 10-20cm of well logging pipe 9-2;Then the die of second layer artesian aquifer water-level observation well casing 11-2 is directed at ground floor The hole heart of artesian aquifer water-level observation hole 9-1, and using hammer mode injection to the above 2m of second layer artesian aquifer top board Position, and utilize the second sealing layer 12 sealing (as shown in Figure 5);
(8) repeat step (4) and step (5), the water level of observation second layer artesian aquifer 11;
(9), after the completion of the water-level observation of second layer artesian aquifer 11, all well casings are pressed the ascending order of diameter Extract successively, and sealing of hole is carried out to peephole using the method for clay ball backfilling tamping.
By the observing buoy being obtained using this utility model is true and reliable to be proved to the analysis of observed result and detection.
Those skilled in the art can carry out various changes and modification without deviating from this utility model to this utility model Spirit and scope.So, if these modifications of the present utility model and modification belong to this utility model claim and its wait Within the scope of technology, then this utility model is also intended to comprise these changes and modification.

Claims (6)

1. a kind of artesian water water-level observation well construction it is characterised in that:This observation well construction includes well casing (1) and in well casing (1) The peephole (2) being inside drilled with, in described peephole (2) coring to artesian aquifer (3), described well casing (1) is seamless gold Belong to pipe, after the completion of peephole (2) construction, directly in earth's surface press-in soil layer, peephole (2) bottom surface place is stretched in its bottom In sealing layer (4) above artesian aquifer (3), the top of described well casing (1) is higher than the upper port of peephole (2).
2. a kind of artesian water water-level observation well construction according to claim 1 it is characterised in that:Described observation well construction is also Including 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 level Peephole (6), described two layers of water-level observation well casing (5) are placed between peephole (2) and well casing (1), are seamless metal pipe, and bottom End is stretched in the second sealing layer (8) above two layers of artesian aquifer (7), and top is higher than the top of well casing (1);Described two layers of water Position peephole (6) is drilled with the bottom surface of peephole (2), and coring is to two layers of artesian aquifer (7).
3. a kind of artesian water water-level observation well construction according to claim 1 or 2 it is characterised in that:Described well casing (1) Bottom is placed in the position of the above 2m-3m of artesian aquifer (3) top surface;Described peephole (2) coring is to artesian aquifer (3) top surface The position of following 1m-2m.
4. a kind of artesian water water-level observation well construction according to claim 2 it is characterised in that:Described two layers of water-level observation The bottom of well casing (5) is placed in the position of the above 2m-3m of two layers of artesian aquifer (7) top surface;Described two layers of water-level observation hole (6) take The position of 1m-2m below two layers of artesian aquifer (7) top surface of core.
5. a kind of artesian water water-level observation well construction according to claim 2 it is characterised in that:Described well casing (1) and two Layer water-level observation well casing (5) all threaded is formed using the seamless steel pipe that multistage wall thickness is 2mm;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).
6. a kind of artesian water water-level observation well construction according to claim 5 it is characterised in that:Described well casing with diameter greater than Observation bore dia 19-60mm.
CN201620953996.2U 2016-08-26 2016-08-26 A kind of artesian water water-level observation well construction Active CN205999876U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106192971A (en) * 2016-08-26 2016-12-07 中冶集团武汉勘察研究院有限公司 A kind of artesian water water-level observation well construction and the method for multilamellar water-level observation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106192971A (en) * 2016-08-26 2016-12-07 中冶集团武汉勘察研究院有限公司 A kind of artesian water water-level observation well construction and the method for multilamellar water-level observation

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