CN103592002A - Groundwater level testing device applicable to vacuum preloading foundation treatment technology and using method of groundwater level testing device - Google Patents
Groundwater level testing device applicable to vacuum preloading foundation treatment technology and using method of groundwater level testing device Download PDFInfo
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- CN103592002A CN103592002A CN201310478672.9A CN201310478672A CN103592002A CN 103592002 A CN103592002 A CN 103592002A CN 201310478672 A CN201310478672 A CN 201310478672A CN 103592002 A CN103592002 A CN 103592002A
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Abstract
The invention discloses a groundwater level testing device comprising a water level pipe, an emission sheet, a light-transmitting sheet and a laser range finder. The water level pipe is formed by coaxial connection of a main pipe located on the upper portion and a filter pipe located on the lower portion, the outer wall of the filter pipe is coated with a drain board filter membrane, and the bottom of the filter pipe is closed. The emission sheet floats on the water surface in the water level pipe; the light-transmitting sheet covers and is fixed on the pipe top of the water level pipe; the laser range finder is located above the light-transmitting sheet for testing. Test is performed based on the laser range finding principle, a test method is simple and convenient, test cost is low, and test results are visual, true and reliable, so that groundwater level change rules in a foundation can be acquired accurately.
Description
Technical field
The present invention relates to Soft Ground Improved By Vacuum Preloading processing technology field, specifically a kind of Novel underground test device for water level and using method thereof that is applicable to Soft Ground Improved By Vacuum Preloading treatment technology.
Background technology
Study the Changing Pattern of underground water table in vacuum pre-press reinforcing process, be conducive to further be familiar with the mechanism of vacuum method consolidated subsoil, be more conducive to the evaluate and analyze to vacuum pre-press reinforcing effect.Yet, about the Changing Pattern of underground water table in vacuum pre-press reinforcing process, be all the focus of industry arguement and difference all the time.At present, mainly contain 3 kinds of viewpoints, be respectively that underground water table rises, underground water table is constant and underground water table declines.Therefore, how simply and effectively to obtain the real change rule of underground water table in Soft Ground Improved By Vacuum Preloading, become industry problem demanding prompt solution.
Obviously, " obtain the real change rule of underground water table " and depend primarily on validity and the accuracy of underground water table method of testing.At present, in Soft Ground Improved By Vacuum Preloading processing technology field, underground water table method of testing mainly contains: 1. conventional water level pipe method, 2. the disclosed method ,③ of Chinese patent CN 2777511Y Hohai University improved method (Geotechnical Engineering journal-2009, Vol.31:48-51).Deficiency is separately respectively: 1. the test value of method is not the actual value of underground water table under vacuum state, and 2. method has explicitly pointed out its limitation; 2. method energy indirect calculation goes out the underground water place value under vacuum state, but proving installation is complicated, calculation procedure is loaded down with trivial details, affect the many factors of result of calculation accuracy, also lack intuitive.3. the vacuum tightness that method proving installation is complicated, installation steps are loaded down with trivial details, be difficult to guarantee " inner tube with outer tube between " is consistent with the vacuum tightness of " under diaphragm seal ", and its test value can not represent the actual value of underground water table under vacuum state completely.With respect to 2. method with 3. for method, although 1. method exists limitation, owing to thering is simple possible, be still widely used at present engineering reality.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned existing method of testing, provide a kind of install simple, installation method is simple and easy, method of testing is easy, test result is accurate, testing cost is low, be applicable to Novel underground test device for water level and the using method thereof of Soft Ground Improved By Vacuum Preloading treatment technology.
For achieving the above object, the present invention adopts following technical proposals: a kind of underground water table proving installation that is applicable to Soft Ground Improved By Vacuum Preloading treatment technology, is characterized in that comprising: water level pipe, sheet emitting, light transmission piece and laser range finder,
Described water level pipe is coaxially formed by connecting by the chimney filter that occupy the supervisor on top and occupy bottom, and the outer wall of chimney filter is coated with drain bar filter membrane, chimney filter base seal,
Described sheet emitting flies at the water surface in described water level pipe,
Described light transmission piece covers and is fixed on the pipe top of described water level pipe, and described laser range finder is positioned at described light transmission piece top to be tested.
The present invention also provides a kind of underground water table test macro, and it comprises water level pipe, sheet emitting, light transmission piece and laser range finder, vacuum seal film, lubrication and seal material,
Described water level pipe is coaxially formed by connecting by the chimney filter that occupy the supervisor on top and occupy bottom, and the outer wall of chimney filter is coated with drain bar filter membrane, chimney filter base seal, and water level pipe is vertically inserted in the soil body to be measured, and supervisor is exposed to soil body surface,
Described sheet emitting flies at the water surface in described water level pipe,
Described light transmission piece covers and is fixed on the pipe top of described water level pipe, and described laser range finder is positioned at described light transmission piece top to be tested,
Described vacuum seal film extends to be exposed to supervisor's outer wall of soil body surface and to seal from soil body surface and fixes,
Described lubrication and seal material is filled in vacuum seal film and is exposed between supervisor's outer wall of soil body surface.
Further, the absolute altitude of water level pipe chimney filter and water level pipe supervisor junction is not less than the underground water table absolute altitude in the front ground of vacuum pre-press reinforcing.
Described supervisor and described chimney filter are tightly connected.
The present invention also provides a kind of underground water table method of testing of Soft Ground Improved By Vacuum Preloading treatment technology, and it has adopted underground water table proving installation as above, and adopts following operation steps:
(1) insert in foundation soil body to be measured to projected depth water level pipe is vertical, wherein the absolute altitude of chimney filter and supervisor junction should be not less than the underground water table absolute altitude in ground before vacuum pre-press reinforcing;
(2) toward injecting clear water in water level pipe, rinse to Guan Zhongshui no longer muddyly, sheet emitting is put into pipe, it is bubbled through the water column;
(3) light transmission piece level is fixed on to place, supervisor's pipe top, and guarantees planarization;
(4) vacuum seal film is coated on part pipeline section outer wall and the supervisor's soil body surface around that supervisor exposes soil body surface;
(5) at vacuum seal film and supervisor, expose filling lubrication and seal material between the part pipeline section outer wall of soil body surface;
(6), before vacuumizing, by laser range finder, gather stable data, as underground water table initial reading;
(7) in vacuum preloading process, by laser range finder, carry out tracking and testing, obtain real-time reading.
Lubrication and seal material in described step 5 is butter etc. has the colloid of good sealing property and lubricity.
In described step 5, between vacuum seal film and supervisor, by the colligation of vacuum seal membrane material, fix.
Specifically, described use laser range finder image data is carried out successively in the steps below:
1. laser range finder transmitting terminal is close to the light transmission piece that is fixed on place, water level pipe supervisor pipe top;
2. the sheet emitting on bubbling through the water column in laser range finder transmitting terminal aligning water level pipe pipe;
3. laser range finder continuous emission excimer laser bundle, simultaneously automatic acquisition record in water level pipe pipe the water surface to the distance of the mouth of pipe;
While 4. testing, repeat 1.～3.. at every turn
The present invention is based on laser distance measuring principle and test, method of testing is easy, testing cost is low, test result is directly perceived and true and reliable, therefore, can obtain more exactly the Variation Regular of Groundwater Levels in ground.Particularly importantly, the vacuum tightness inside and outside underground water table proving installation energy guaranteed water level pipe of the present invention is consistent with the vacuum tightness under diaphragm seal, and its test value can reflect the actual value of underground water table under vacuum state truly.
Accompanying drawing explanation
Fig. 1 is underground water table proving installation schematic diagram of the present invention.
In figure: 1-supervisor; 2-chimney filter; 3-sheet emitting; 4-light transmission piece; 5-laser range finder; 6-vacuum seal film; The lubrication and seal materials such as 7-butter; 8-horizontal drainage sand bedding course; 9-is reinforced soft soil foundation; Underground water table before 10-vacuum pre-press reinforcing in ground.
Embodiment:
Below be only enforcement example of the present invention, can not limit scope of the present invention with this.The unsubstantiality of in every case doing according to the present patent application the scope of the claims changes and modifies, and all should still remain within the scope of the patent.
As shown in Figure 1, this underground water table proving installation comprises water level pipe (being assembled by supervisor 1 and chimney filter 2), sheet emitting 3, light transmission piece 4, laser range finder 5.
Below with reference to 1 pair of underground test device for water level of Figure of description and using method thereof, describe.
(1) first utilize the drilling equipment meet technical requirement that water level pipe (being assembled by supervisor 1 and chimney filter 2) is installed to projected depth, and guarantee water level pipe verticality, be positioned at chimney filter 2 bottoms, projected depth place and each pipeline section junction sealing, be responsible for the planarization of 1 pipe top section;
Water level pipe chimney filter 2 can be guaranteed the water level maintenance mobile equilibrium of water level in time and in its periphery soil body in pipe in vacuum pre-press reinforcing process.It should be noted that chimney filter 2 outer walls need outsourcing drain bar filter membrane, bottom sealing, affect the permeable effect of freedom of chimney filter 2 to avoid soil body fine grained around to enter the serious silting phenomenon of appearance in pipe.In addition, the absolute altitude that water level pipe chimney filter 2 and water level pipe are responsible for 1 junction should be not less than the underground water table absolute altitude 10 in ground before vacuum pre-press reinforcing.
(2) toward the interior clear water that injects of pipe, rinse, until the water in pipe is no longer muddy after a period of stabilisation; Sheet emitting 3 is put into pipe, make it fly at the water surface;
(3) light transmission piece 4 levels are fixed on to supervisor 1 place, pipe top, and guarantee planarization;
(4) vacuum seal film 6 is coated on part pipeline section outer wall and 8 surfaces of sand bedding course around thereof that water level pipe supervisor 1 exposes sand bedding course 8 surfaces.
(5) vacuum seal film 6 and water level pipe supervisor 1 exposes and between the part pipeline section outer wall on sand bedding course 8 surfaces, is filled with butter or other the colloid with good sealing property and lubricity as lubrication and seal material 7, and by the 6 material colligations of vacuum seal film, fix between the two, to avoid water level pipe and surrounding soil that inconsistent sedimentation occurs, cause 6 drawing cracks of vacuum seal film, gas leakage, and then weaken sand bedding course 8 and be reinforced the vacuum transmission effect in soft soil foundation 9.
(6), before vacuumizing, by laser range finder, gather the stable reading in water level pipe supervisor 1, as underground water table initial reading;
Wherein, the image data process of laser range finder is carried out successively in the steps below:
1. laser range finder transmitting terminal is close to the light transmission piece that is fixed on place, water level pipe supervisor pipe top;
2. the sheet emitting on bubbling through the water column in laser range finder transmitting terminal aligning water level pipe pipe;
3. laser range finder continuous emission excimer laser bundle, simultaneously automatic acquisition record in water level pipe pipe the water surface to the distance of the mouth of pipe;
While 4. testing, repeat 1.～3.. at every turn
(7) in vacuum preloading process, by laser range finder, carry out tracking and testing, as real-time reading.
Test philosophy of the present invention is: light is with speed c propagation in pipe, and between the mouth of pipe and sheet emitting, round trip required time is t, and distance B is between the two: D=ct/2.
In vacuum pre-press reinforcing foundation process, water level in water level pipe pipe can change, therefore swim in the sheet emitting on the water surface 3 in pipe also can move thereupon, cause the water surface in water level pipe pipe to the distance of the mouth of pipe to change, thereby changed the reading of laser range finder, according to the variation of reading, can accurately measure the variation of underground water table.
Claims (8)
1. a underground water table proving installation that is applicable to Soft Ground Improved By Vacuum Preloading treatment technology, is characterized in that comprising: water level pipe, sheet emitting, light transmission piece and laser range finder,
Described water level pipe is coaxially formed by connecting by the chimney filter that occupy the supervisor on top and occupy bottom, and the outer wall of chimney filter is coated with drain bar filter membrane, chimney filter base seal,
Described sheet emitting flies at the water surface in described water level pipe,
Described light transmission piece covers and is fixed on the pipe top of described water level pipe, and described laser range finder is positioned at described light transmission piece top to be tested.
2. a underground water table test macro that is applicable to Soft Ground Improved By Vacuum Preloading treatment technology, is characterized in that comprising: water level pipe, sheet emitting, light transmission piece and laser range finder, vacuum seal film, lubrication and seal material,
Described water level pipe is coaxially formed by connecting by the chimney filter that occupy the supervisor on top and occupy bottom, and the outer wall of chimney filter is coated with drain bar filter membrane, chimney filter base seal, and water level pipe is vertically inserted in the soil body to be measured, and supervisor is exposed to soil body surface,
Described sheet emitting flies at the water surface in described water level pipe,
Described light transmission piece covers and is fixed on the pipe top of described water level pipe, and described laser range finder is positioned at described light transmission piece top to be tested,
Described vacuum seal film extends to be exposed to supervisor's outer wall of soil body surface and to seal from soil body surface and fixes,
Described lubrication and seal material is filled in vacuum seal film and is exposed between supervisor's outer wall of soil body surface.
3. underground water table test macro according to claim 2, is characterized in that: the absolute altitude of water level pipe chimney filter and water level pipe supervisor junction is not less than the underground water table absolute altitude in the front ground of vacuum pre-press reinforcing.
4. underground water table test macro according to claim 2, is characterized in that: described supervisor and described chimney filter are tightly connected.
5. a underground water table method of testing for Soft Ground Improved By Vacuum Preloading treatment technology, is characterized in that having adopted underground water table proving installation as claimed in claim 1, and comprises following operation steps:
(1) insert in foundation soil body to be measured to projected depth water level pipe is vertical, wherein the absolute altitude of chimney filter and supervisor junction should be not less than the underground water table absolute altitude in ground before vacuum pre-press reinforcing;
(2) toward injecting clear water in water level pipe, rinse to Guan Zhongshui no longer muddyly, sheet emitting is put into pipe, it is bubbled through the water column;
(3) light transmission piece level is fixed on to place, supervisor's pipe top, and guarantees planarization;
(4) vacuum seal film is coated on part pipeline section outer wall and the supervisor's soil body surface around that supervisor exposes soil body surface;
(5) at vacuum seal film and supervisor, expose filling lubrication and seal material between the part pipeline section outer wall of soil body surface;
(6), before vacuumizing, by laser range finder, gather stable data, as underground water table initial reading;
(7) in vacuum preloading process, by laser range finder, carry out tracking and testing, obtain real-time reading.
6. method according to claim 5, is characterized in that: the lubrication and seal material in described step 5 is butter.
7. method according to claim 5, is characterized in that: in described step 5, between vacuum seal film and supervisor, by the colligation of vacuum seal membrane material, fix.
8. method according to claim 5, is characterized in that: described use laser range finder image data is carried out successively in the steps below:
1. laser range finder transmitting terminal is close to the light transmission piece that is fixed on place, water level pipe supervisor pipe top;
2. the sheet emitting on bubbling through the water column in laser range finder transmitting terminal aligning water level pipe pipe;
3. laser range finder continuous emission excimer laser bundle, simultaneously automatic acquisition record in water level pipe pipe the water surface to the distance of the mouth of pipe;
While 4. testing, repeat 1.～3.. at every turn
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310478672.9A CN103592002B (en) | 2013-10-14 | 2013-10-14 | Groundwater level testing device applicable to vacuum preloading foundation treatment technology and using method of groundwater level testing device |
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| CN201310478672.9A CN103592002B (en) | 2013-10-14 | 2013-10-14 | Groundwater level testing device applicable to vacuum preloading foundation treatment technology and using method of groundwater level testing device |
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| CN103592002B CN103592002B (en) | 2017-02-01 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316144A (en) * | 2014-11-04 | 2015-01-28 | 河海大学 | Visual measurement device for underground water level under negative pressure condition and measurement method |
| CN105424139B (en) * | 2015-11-05 | 2018-08-28 | 河海大学 | Level of ground water plugging meter devices and methods therefor based on ultrasonic wave negative pressure |
| CN109374091A (en) * | 2018-10-31 | 2019-02-22 | 重庆交通大学 | A kind of underground water level measurement device and measurement method |
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| CN201574168U (en) * | 2009-12-08 | 2010-09-08 | 攀枝花新钢钒股份有限公司 | Vacuum treatment jacking system |
| CN202453039U (en) * | 2011-10-14 | 2012-09-26 | 上海工电能源科技有限公司 | Laser liquid-level measuring device |
| CN203629640U (en) * | 2013-10-14 | 2014-06-04 | 中交四航工程研究院有限公司 | Underground water level test device and system applicable to vacuum preloading foundation treatment technology |
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2013
- 2013-10-14 CN CN201310478672.9A patent/CN103592002B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4266609A (en) * | 1978-11-30 | 1981-05-12 | Technion Research & Development Foundation Ltd. | Method of extracting liquid and gaseous fuel from oil shale and tar sand |
| CN2777511Y (en) * | 2005-04-08 | 2006-05-03 | 广州四航工程技术研究院 | Tester for underground water level in vacuum prepressing reinforced area |
| CN1862237A (en) * | 2006-06-09 | 2006-11-15 | 河海大学 | Device and method for testing water level in vacuum prepressing foundation reinforced area |
| CN101074889A (en) * | 2007-06-14 | 2007-11-21 | 南京航空航天大学 | Float laser liquid-level measuring device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316144A (en) * | 2014-11-04 | 2015-01-28 | 河海大学 | Visual measurement device for underground water level under negative pressure condition and measurement method |
| CN104316144B (en) * | 2014-11-04 | 2017-06-09 | 河海大学 | A kind of visualization measurement method of level of ground water under condition of negative pressure |
| CN105424139B (en) * | 2015-11-05 | 2018-08-28 | 河海大学 | Level of ground water plugging meter devices and methods therefor based on ultrasonic wave negative pressure |
| CN109374091A (en) * | 2018-10-31 | 2019-02-22 | 重庆交通大学 | A kind of underground water level measurement device and measurement method |
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| CN103592002B (en) | 2017-02-01 |
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Effective date of registration: 20170921 Address after: 510000 headquarters building, Guangzhou, Haizhuqu District, Guangdong Zhenxing street, No. 18, Patentee after: CCCC Fourth Harbor Engineering Co.,Ltd. Address before: 510230 Guangzhou Qianjin Road, Guangdong, No. 157 Co-patentee before: CCCC FOURTH HARBOR GEOTECHNICAL ENGINEERING Co.,Ltd. Patentee before: CCCC FOURTH HARBOR ENGINEERING INSTITUTE Co.,Ltd. Co-patentee before: GUANGZHOU HARBOR ENGINEERING QUALITY EXAMINATION Co.,Ltd. Co-patentee before: GUANGZHOU SIHANG MATERIAL TECHNOLOGY Co.,Ltd. |
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