CN211340976U - Outer layering water stopping device of underground water layering water pumping test sleeve - Google Patents
Outer layering water stopping device of underground water layering water pumping test sleeve Download PDFInfo
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- CN211340976U CN211340976U CN201921965390.0U CN201921965390U CN211340976U CN 211340976 U CN211340976 U CN 211340976U CN 201921965390 U CN201921965390 U CN 201921965390U CN 211340976 U CN211340976 U CN 211340976U
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Abstract
The utility model relates to an underground water layering test sleeve pipe outer layering sealing device that draws water adopts the stagnant water material that contains sodium polyacrylate super absorbent resin's meeting water inflation rubber as test sleeve pipe outer clearance, according to the experimental period of time of drawing water, adds the component proportion of the sodium polyacrylate super absorbent resin in meeting water inflation rubber material through control, controls its stagnant water time and the expansion ratio of meeting water inflation to adjust its completion clearance and seal stagnant water time. The utility model discloses meet water inflation stagnant water time of meeting water inflation rubber is adjusted at 12 hours to 7 days's time, meet water inflation rubber materials tensile strength big, toughness good, its underwater resistance to compression can exceed 20Mpa, be particularly useful for geological conditions complicated, the construction degree of difficulty is big, the groundwater layering of big degree of depth is taken out water experimentally, have accurate reliable layering and seal the stagnant water effect and more long-term, the layering stagnant water is convenient for the technological effect of control, improved the accuracy of test efficiency and test data simultaneously greatly.
Description
Technical Field
The utility model relates to a hydrogeology field, especially a groundwater layering test sleeve pipe outer layering sealing device that draws water.
Background
In the field of hydrogeology, the experiment of pumping water in underground water layering is crucial, and this experiment can effectively acquire data such as chemical field, power field, temperature field of groundwater, carries out the precision measurement to groundwater, and accurate description groundwater distribution condition has important scientific and practical meaning to rational utilization and protection groundwater resource. The implementation of the stratified water pumping experiment in the underground well hole requires that the geological structure keeps certain stability, and in order to prevent the collapse of the water pumping well hole, a casing needs to be put down to support the wall of the hole after the underground well hole is formed. Certain gaps are reserved between the casing and the hole wall to ensure that the casing is smoothly placed, but water and confined water in a submerged layer flow through the gaps, so that experimental data of each layer when pumping water are influenced.
In order to solve the problem, the outer casing gap of the water-resisting layer section needs to be sealed and stopped. At present, the prior art for external water stopping mostly adopts kelp water stopping or double packers for pouring cement for layered water stopping.
The kelp water stopping device has the following defects that due to the water swelling characteristic of kelp, when a pipeline is placed down, the kelp water stopping device is wound outside the pipeline at a layered target section: the dead kelp can be gradually and completely softened into liquid after being soaked in water for a long time, and the water stopping effect is lost.
Two packers are poured cement and are separated into layers to stop water, the filter material is backfilled at the full-gap hole section outside the sleeve, cement grout is taken as a water stop material, the two packers are placed in the sleeve to press and inject the cement grout from a grouting window preset by a grouting pipe column to the water stop section outside the sleeve to stop water, and the water stop device has the following defects: firstly, in deep well filling, because the gap between a casing and a hole wall is not very large, or the hole wall collapses after the casing is put down, the filter material cannot be completely filled by backfilling, the filter material cannot be fully compacted even if a well washing is adopted, so that the injected cement slurry cannot be blocked at a target section with an expected depth, and the controllability in construction is poor; secondly, the construction process is complicated, the construction time is long, and the plugging effect is not good.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of current test layering watertight fittings that draws water in secret moisture layer, the utility model provides an outer layering watertight fittings of test sleeve pipe is drawn water in groundwater layering.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an outer layering watertight fittings of test sleeve of groundwater layering pumping, includes experimental sleeve, be equipped with the through-hole that permeates water on the experimental sleeve, still include, contain the hollow section of thick bamboo of water-swelling rubber of sodium polyacrylate super absorbent resin for the hollow section of thick bamboo of water-swelling rubber of meeting water of sealed stagnant water of experimental sleeve and experimental well wall of a well formation clearance is nested to be fixed at experimental sleeve outer wall.
Further preferably, the water-swellable rubber hollow cylinder is fixed on the outer wall of the test sleeve by means of self elastic nesting.
The preferred cylinder height of the hollow water-swellable rubber cylinder with large lowering depth is larger than that of the hollow water-swellable rubber cylinder with small lowering depth. The water-swelling sealing layer can form a thicker water-stopping sealing layer after swelling when meeting water, and can bear the underwater pressure of greater water depth.
Preferably, the hollow water-swellable rubber cylinders are divided into two groups, and each group is used for sealing a target zone of underground water stratification for limiting a set test depth. The hollow tube of water-swelling rubber meets water swelling in the clearance of test sleeve and the wall of a well of pumping water, until the clearance of blocking secret water barrier position department to produce the sealed and reach layering stagnant water effect between the equivalent extrusion stress formation water layer, adorn a plurality of hollow tubes of water-swelling rubber of cover outside the test sleeve of each layering purpose section, realize the stagnant water effect of a plurality of layers.
The implementation process comprises the steps of adopting water-swelling rubber containing sodium polyacrylate super absorbent resin as a water-stopping material of the outer gap of the test sleeve, and controlling the water-stopping time and the expansion ratio of the water-swelling rubber material by controlling the component proportion of the sodium polyacrylate super absorbent resin added into the water-swelling rubber material according to the pumping test period; thereby adjust its time of accomplishing clearance and sealing up water, its concrete step is as follows:
1) determining a test period according to the pumping test depth and the construction difficulty; the method comprises the steps of controlling the time for sealing and stopping water in a gap between a test sleeve and a test well wall after the water-swellable rubber swells in the presence of water by adjusting the component proportion of the sodium polyacrylate super absorbent resin in the water-swellable rubber material, wherein the time interval for adjusting the water-swellable rubber to form sealed and stopped water in the gap is 12 hours to 7 days; the addition amount of the sodium polyacrylate super absorbent resin in the water-swelling rubber material is small, the time for completing gap closure and water stop after the sodium polyacrylate super absorbent resin swells in water is long, and on the contrary, the addition amount of the sodium polyacrylate super absorbent resin is large, and the time for completing gap closure and water stop after the sodium polyacrylate super absorbent resin swells in water is short;
2) forming a water-swellable rubber material containing sodium polyacrylate super absorbent resin into a hollow cylinder shape capable of coating the test casing, wherein the outer diameter of the formed water-swellable rubber hollow cylinder is smaller than the diameter of a test well hole;
3) according to the depth of the underground layered water pumping test, a plurality of water-swelling rubber hollow cylinders are fixed at the corresponding positions of the expected lowering test depth of the test casing in an embedded mode; the water-swelling rubber hollow cylinder is divided into two groups, and each group corresponds to a test depth underground water test layered target area for layered water stopping;
4) the test casing pipe nested with the water-swellable rubber hollow cylinder is lowered into a test water well hole to set a test depth and then stands;
5) setting the standing time according to the component proportion of the sodium polyacrylate super absorbent resin added into the water-swellable rubber hollow cylinder material in the step 1), wherein the standing time interval is 12 hours to 7 days;
after standing for a set time, the water-swelling rubber hollow cylinders are completely swelled in water in the gaps between the test casing and the wall of the test well and then close the gaps, and two water-swelling rubber hollow cylinders in the same group swell and generate extrusion stress to close water in the test deep diving layered area outside the test casing and prevent the water from flowing with other deep confined water;
6) and lowering an in-pipe packer and a submersible pump in the test casing pipe to a set test depth layering position, sealing and stopping water in the test casing pipe in a corresponding depth layering manner by the in-pipe packer, pumping water to the test depth by the submersible pump, and finishing a groundwater layering pumping test.
Further preferably, the water-swellable rubber hollow cylinder is made of the following components in parts by weight: 100 parts of rubber, 40-80 parts of sodium polyacrylate super absorbent resin, 4 parts of modified aramid short fiber, 20 parts of carbon black and 20 parts of white carbon black; the rubber compound is prepared from the components by a physical mechanical blending method, the rubber compound is vulcanized and molded to prepare the water-swelling rubber hollow cylinder, the molded water-swelling rubber hollow cylinder swells in the presence of water, a gap between the test casing and the wall of the test well is sealed, and the time interval for sealing the gap is 12 hours to 7 days. The sodium polyacrylate super absorbent resin can adjust the water absorption expansion rate and the tensile strength of the water-swellable rubber, and the modified aramid short fiber has the function of adjusting the hardness and the tensile strength of the water-swellable rubber.
Preferably, the water-swellable rubber hollow cylinder is made of the following components in parts by weight: 100 parts of rubber, 80 parts of sodium polyacrylate super absorbent resin, 4 parts of modified aramid short fiber, 20 parts of carbon black and 20 parts of white carbon black; after the formed water-swelling rubber hollow cylinder swells in the presence of water, the sealing and water stopping time of the gap between the test casing and the wall of the test well is finished for 12 hours.
Preferably, the water-swellable rubber hollow cylinder is made of the following components in parts by weight: 100 parts of rubber, 70 parts of sodium polyacrylate super absorbent resin, 4 parts of modified aramid short fiber, 20 parts of carbon black and 20 parts of white carbon black; after the formed water-swelling rubber hollow cylinder swells in the presence of water, the sealing and water stopping time of the gap between the test casing and the wall of the test well is finished for 1 day.
Preferably, the water-swellable rubber hollow cylinder is made of the following components in parts by weight: 100 parts of rubber, 40 parts of sodium polyacrylate super absorbent resin, 4 parts of modified aramid short fiber, 20 parts of carbon black and 20 parts of white carbon black; after the formed water-swelling rubber hollow cylinder swells in the presence of water, the sealing and water stopping time of the gap between the test casing and the wall of the test well is completed within 7 days.
Preferably, the height of the hollow tube body of the water-swellable rubber tube in the step 2) is increased according to the deepening of the lowering depth; and forming a corresponding thickness which can bear the underwater pressure of the corresponding depth after expansion to finish closing the water stop layer.
The utility model has the advantages that: the water-swelling rubber containing the sodium polyacrylate super absorbent resin is used as the water-stopping material of the outer gap of the test casing, and the water-stopping time and the expansion ratio of the sodium polyacrylate super absorbent resin added into the water-swelling rubber hollow cylinder material are controlled by controlling the component proportion of the sodium polyacrylate super absorbent resin according to the pumping test period, so that the water-stopping time for completing gap closure is adjusted. The adjusting time interval for the water-swelling rubber to form closed water stop in the gap is 12 hours to 7 days.
The utility model discloses a to the interval form seal stagnant water time regulation, especially can be to the construction degree of difficulty big, the big degree of depth layering test of drawing water, if exceed 800 m's the big degree of depth layering test of drawing water, adopt the technical scheme of the invention, through reducing the component proportion of the sodium polyacrylate super absorbent resin among the water-swelling rubber material, prolong the interval and seal stagnant water time, in the test construction of drawing water, have sufficient time to accomplish the process of transferring of test sleeve pipe, realized that whole groundwater layering draws water the accurate controllable of test process. Further ensuring the accuracy and reliability of the test data.
Before the test casing is put into a pumping well, the water-swelling rubber with the adjusted content of the sodium polyacrylate super absorbent resin is made into a water-swelling rubber hollow cylinder, and then the water-swelling rubber hollow cylinder is sleeved outside the test casing of each layered target section. After the test casing is lowered, the water-swelling rubber hollow cylinder swells when meeting water in the gap between the test casing and the wall of the test well until the gap at the position of the underground water-resisting layer is blocked, and the equivalent extrusion stress is generated to form the sealing between the water layers so as to achieve the layered water stopping effect. The plugging device solves the problems of inaccurate plugging depth, poor controllability, complex construction process, long construction time and poor plugging effect in the prior art.
The utility model discloses the water-swelling stagnant water time of meeting water inflation rubber that will contain sodium polyacrylate super absorbent resin is adjusted at 12 hours to 7 days's time, it is big to meet water inflation rubber materials tensile strength, toughness is good, its underwater resistance to compression can exceed 20Mpa, be particularly useful for geological conditions complicated, the construction degree of difficulty is big, the groundwater stratification of big degree of depth is taken out water experimentally, it seals stagnant water effect and more long-term to have accurate reliable layering, the layering stagnant water is convenient for the technological effect of control, the accuracy of efficiency of software testing and test data has been improved greatly simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of the polyacrylate super absorbent resin expansion cylinder of the present invention;
fig. 3 is a schematic diagram of the present invention.
Parts and numbering in the figures:
1-test sleeve; 2-water swelling rubber hollow cylinder; 3-test water well; 4-a packer inside the pipe; 5-a submersible pump; 6-first stratification zone; 7-second split zone.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1-3, an outer layering water stopping device of an underground water layering water pumping test casing comprises a test casing 1, wherein a water permeable through hole is formed in the test casing 1, and the outer layering water stopping device is characterized by further comprising a water swelling rubber hollow cylinder 2 containing sodium polyacrylate super absorbent resin, and the water swelling rubber hollow cylinder 2 used for sealing and stopping water in a gap formed between the test casing 1 and a test well wall is embedded and fixed on the outer wall of the test casing 1.
According to the water pumping test period, the water stopping time and the expansion ratio of the water-swellable sodium polyacrylate super absorbent resin are controlled by controlling the component proportion of the sodium polyacrylate super absorbent resin added into the water-swellable rubber material; thereby adjusting the time for finishing the clearance closing and water stopping.
The water-swelling rubber hollow cylinder 2 is fixed on the outer wall of the test casing 1 by self elastic nesting.
The height of the hollow water-swellable rubber tube 2 with large lowering depth is larger than that of the hollow water-swellable rubber tube with small lowering depth. The water-swelling sealing layer can form a thicker water-stopping sealing layer after swelling when meeting water, and can bear the underwater pressure of greater water depth.
The two water-swellable rubber hollow cylinders 2 are in a group, and each group is used for sealing a groundwater layering target area for limiting a set test depth. The water-swelling rubber hollow cylinder swells in water in a gap between the test casing and the wall of a test well until the gap at the position of an underground water-resisting layer is blocked, and equivalent extrusion stress is generated to form sealing between water layers so as to achieve a layered water stopping effect.
Example 1
As shown in fig. 1 to 3, the outer layered water stop device of the underground water layered water pumping test sleeve is prepared to comprise a test sleeve 1 for a water pumping test, wherein the test sleeve 1 is provided with a water permeable through hole, and the implementation process is as follows:
1) determining a test period according to the pumping test depth and the construction difficulty of the test well 3; the sealing and water stopping time of the gap between the test casing and the wall of the test well 3 after the water-swellable rubber is swelled in water is controlled by adjusting the component proportion of the sodium polyacrylate super absorbent resin in the water-swellable rubber material;
the water-swellable rubber hollow cylinder 2 is made of the following materials in parts by weight: 100 parts of rubber, 80 parts of sodium polyacrylate super absorbent resin, 4 parts of modified aramid short fiber, 20 parts of carbon black and 20 parts of white carbon black; the rubber compound is prepared from the components by a physical mechanical blending method, the rubber compound is vulcanized and molded to prepare the water-swellable rubber hollow cylinder 2, and after the molded water-swellable rubber hollow cylinder 2 swells in the presence of water, the time for sealing and stopping water of the gap between the test casing 1 and the wall of the test well 3 is 12 hours. The test method is used for the water pumping test within the test depth of 50M.
The water-swellable rubber hollow cylinder 2 is made of the following materials in parts by weight: 100 parts of rubber, 70 parts of sodium polyacrylate super absorbent resin, 4 parts of modified aramid short fiber, 20 parts of carbon black and 20 parts of white carbon black; after the molded water-swellable rubber hollow cylinder 2 swells with water, the sealing and water stopping time is finished in a gap between the test casing 1 and the wall of the test well 3 for 1 day. The method is suitable for the water pumping test with the test depth within 100M.
The water-swellable rubber hollow cylinder 2 is made of the following materials in parts by weight: 100 parts of rubber, 40 parts of sodium polyacrylate super absorbent resin, 4 parts of modified aramid short fiber, 20 parts of carbon black and 20 parts of white carbon black; after the molded water-swellable rubber hollow cylinder 2 swells with water, the sealing and water stopping time of the gap between the test casing 1 and the wall of the test well 3 is finished for 7 days. Is suitable for the underground water stratified pumping test with great construction difficulty and depth of over 800m,
2) forming a water-swellable rubber material containing sodium polyacrylate super absorbent resin into a hollow cylinder shape capable of coating the test casing 1, wherein the outer diameter of the formed water-swellable rubber hollow cylinder 2 is smaller than the hole diameter of the test well 3;
3) according to the depth of the underground layered water pumping test, a water-swelling rubber hollow cylinder 2 is fixed at the position of the expected lowering test depth of the test sleeve 1 in an embedded manner; defining a subsurface water stratification test target zone by grouping two; as shown in fig. 1, a first divided zone 6 and a second divided zone 7, etc. are set, wherein the cylinder height of the water-swellable rubber hollow cylinder 2 increases according to the depth of lowering; and a thicker water-stop sealing layer is formed, and the water-stop sealing layer can bear the underwater pressure of corresponding water depth. The water-swellable rubber hollow barrel 2 can be embedded and fixed on the outer wall of the test sleeve 1 by means of elasticity of the water-swellable rubber hollow barrel;
4) the test casing 1 nested with the water-swellable rubber hollow cylinders 2 is lowered to a preset test depth in a test well 3 and then stands, and the two groups of water-swellable rubber hollow cylinders 2 reach the corresponding depths of a first interlayer zone 6 and a second interlayer zone 7 respectively;
5) setting the standing time according to the component proportion of the sodium polyacrylate super absorbent resin added into the water-swellable rubber hollow cylinder 2 material in the step 1), wherein the standing time interval is 12 hours to 7 days; after standing for a set time, the water-swelling rubber hollow cylinders 2 swell in water in gaps between the test casing 1 and the wall of the test well 3, the gaps are closed, two water-swelling rubber hollow cylinders 2 in the same group swell, and generate extrusion stress to close water in a test deep diving layered area outside the test casing 1 and prevent the water from flowing with other deep confined water;
6) and (3) lowering an in-pipe packer 4 and a submersible pump 5 to the corresponding depth position of the first zonal region 6 in the test casing 1, setting the in-pipe packer 4 in the test casing 1 until the water of the first zonal region 6 in the test casing 1 is separated, and pumping water by the submersible pump 5 to finish the groundwater zonal pumping test of the first zonal region 6.
Example 2
As shown in fig. 3, after the underground water layer pumping test of the first layer area 6 is completed, the upper and lower internal packers 4 are decompressed, and are further lowered to the corresponding depth position of the second layer area 7 together with the submersible pump 5 in the test casing 1, the upper and lower internal packers 4 are set after being pressurized and expanded until the water of the second layer area 7 in the test casing 1 is separated, and the submersible pump 5 pumps water, so that the underground water layer pumping test of the second layer area 7 is completed.
Example 3
Referring to fig. 3, after the groundwater zonal pumping test of the second zonal region 7 is completed, the upper and lower in-pipe packers 4 are depressurized, and are further lowered to other zonal regions with larger depths together with the submersible pump 5 in the test casing 1, so that the groundwater zonal pumping test is completed.
Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it is obvious for those skilled in the art to make other variations or changes based on the above descriptions, and all the embodiments cannot be exhausted here, and all the obvious variations or changes that belong to the technical solutions of the present invention are still in the protection scope of the present invention.
Claims (4)
1. The utility model provides an outer layering watertight fittings of test sleeve of groundwater layering pumping, includes test sleeve (1), be equipped with the through-hole that permeates water on test sleeve (1), its characterized in that still includes, contains the hollow section of thick bamboo (2) of water-swelling rubber of sodium polyacrylate super absorbent resin for test sleeve (1) and the experimental well wall of a well form the hollow section of thick bamboo (2) nestification of water-swelling rubber of clearance closure stagnant water with the experimental well wall of a well and fix at test sleeve (1) outer wall.
2. The external layered water stop device of the underground water layered pumping test casing according to claim 1, wherein the water-swellable rubber hollow cylinder (2) is fixed on the outer wall of the test casing (1) by self elastic nesting.
3. The outer layered water stop device of the underground water layered water pumping test casing according to claim 1, wherein the height of the hollow water-swellable rubber barrel (2) with large lowering depth is larger than that with small lowering depth.
4. The device for separately layering water outside the casing for the underground water layering water pumping test according to any one of claims 1 to 3, wherein the hollow water-swelling rubber cylinders (2) are divided into two groups, and each group is used for sealing a target underground water layering area which defines a set test depth.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921965390.0U CN211340976U (en) | 2019-11-14 | 2019-11-14 | Outer layering water stopping device of underground water layering water pumping test sleeve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921965390.0U CN211340976U (en) | 2019-11-14 | 2019-11-14 | Outer layering water stopping device of underground water layering water pumping test sleeve |
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| CN211340976U true CN211340976U (en) | 2020-08-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700348A (en) * | 2019-11-14 | 2020-01-17 | 四川省地质工程勘察院集团有限公司 | Method and device for layered water stopping outside casing pipe in underground water layered water pumping test |
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2019
- 2019-11-14 CN CN201921965390.0U patent/CN211340976U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700348A (en) * | 2019-11-14 | 2020-01-17 | 四川省地质工程勘察院集团有限公司 | Method and device for layered water stopping outside casing pipe in underground water layered water pumping test |
| CN110700348B (en) * | 2019-11-14 | 2024-05-24 | 四川省地质工程勘察院集团有限公司 | Method and device for layered water stop outside underground water layered water pumping test sleeve |
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