CN201610552U - Strong vacuum unwatering downcomer well - Google Patents
Strong vacuum unwatering downcomer well Download PDFInfo
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- CN201610552U CN201610552U CN2010290980324U CN201029098032U CN201610552U CN 201610552 U CN201610552 U CN 201610552U CN 2010290980324 U CN2010290980324 U CN 2010290980324U CN 201029098032 U CN201029098032 U CN 201029098032U CN 201610552 U CN201610552 U CN 201610552U
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Abstract
A strong vacuum unwatering downcomer well belongs to the technical field of underground engineering dewatering, solving the technical problem in the prior art that the dewatering radius is less and the water outlet rate is low. The downcomer well comprises a well casing, a filter, a water pump and a vacuum pump, wherein the vacuum pump is mounted on the ground, the filter is jointed with the tube wall at the bottom section of the well casing, characterized in that an water inlet communicated with the filter is arranged on the tube wall at the bottom section of the well casing, the water pump is mounted in the well casing, a water suction is higher than the water inlet of the well casing, the top of the well casing is sealed for preventing the gas leakage with a well cover, the well cover is provided with a gas exhaust hole, a drain hole and a cable hole, a vacuum tube communicated with a suction inlet of the vacuum pump is arranged in the gas exhaust hole, the cable conductor of the water pump and the cable conductor connected with the discharge outlet are guided out through the cable hole and the drain hole on the well cover, the hole wall of each hole on the well cover is in the hermetic seal connection with corresponding part in each hole. The downcomer well provided by the utility model can shorten the dewatering runtime and improve the water outlet rate.
Description
Technical field
The utility model relates to the technology of underground construction precipitation, particularly relates to a kind of technology of effective vacuum dewatering pipe well.
Background technology
In the underground engineering construction process in high water level area, often adopt the method for precipitation to reduce soil moisture in layer, thereby improve the construction safety of soil solidifying intensity, reduction artesian water jacking force, guarantee underground construction.Wherein, tube well dewatering is the widest a kind of precipitation method of range of application, has the wide characteristics in big, the suitable stratum of precipitation depth, is applicable to that transmission coefficient is 10
-4～10
2The m/d order of magnitude, stratum water yield are 10
-1～10
3m
3The various stratum of/d order of magnitude.
Traditional tube well dewatering all relies on action of gravity that underground water is compiled in pipe well, and the water that collects in the pipe well is discharged by suction pump.This precipitation mode does not possess the effect that the water of hydration of making is broken away from soil particle gravitation, can only extract a spot of gravity water out, and is relatively poor for the dewatering effect of the little clay of transmission coefficient, silty clay, clay silt layer.Along with the development of technology, tube well dewatering has been introduced the supplementary means of negative pressure of vacuum, has quickened underground water and has compiled in well, has improved drainage efficiency and dewatering effect.
But, existing vacuum-dewatering pipe well is owing to the sealing of structure is difficult to be guaranteed, there is tangible technical weak link in the pipe well structure, can not form and remain powerful negative pressure gravitation relation between well casing inner chamber and the precipitation target zone, negative pressure of vacuum is only about 0.06MPa in the well casing of precipitation initial operating stage, the precipitation later stage in service only can maintain 0.04MPa or lower, therefore negative pressure of vacuum gravitation is not enough in whole pump process breaks away from soil particle so that be difficult to the water of hydration of pump drainage, and its water outlet effect is still undesirable; Be that just there is above-mentioned defective in disclosed a kind of concentric circles double-bushing vacuum deep well well point in the patent of invention of ZL200610118379.1 for example in the patent No., especially for main object---the saturated viscous soil horizon and the mealiness soil layer of drainage precipitation, the tube well dewatering water rate of this invention is not high, the radius of influence that draws water is little, the operation of drawing water is long in time limit, can not reach the desired target that reduces precipitation target zone water content significantly of drainage precipitation purpose.
The utility model content
At the defective that exists in the above-mentioned prior art, it is big that technical problem to be solved in the utility model provides a kind of radius of influence that draws water, operation duration of drawing water is short, can realize the effective vacuum dewatering pipe well of high water rate in little saturated viscous soil horizon of transmission coefficient and mealiness soil layer.
In order to solve the problems of the technologies described above, a kind of effective vacuum dewatering pipe well provided by the utility model, comprise well casing, strainer, suction pump and vacuum pump, described vacuum pump is installed on ground, the end section tube wall socket of described strainer and well casing, it is characterized in that: the end section tube wall of described well casing is provided with the water inlet that is communicated with strainer, described suction pump is installed in the well casing, its water sucking mouth is higher than the water inlet of well casing, described well casing top seals with a well lid anti-gas-leak, described well lid is provided with three through holes, is respectively aspirating hole, drain hole and cable aperture; Be provided with the vacuum tube of a connection vacuum pump air entry in the described aspirating hole, the hole wall anti-gas-leak sealing of the outer wall of this vacuum tube and aspirating hole; The cable aperture of the cable of described suction pump on well lid drawn well casing, its outfall is connected to a gutter, the drain hole of this gutter on well lid drawn well casing, and the sealing of the hole wall anti-gas-leak of the outer peripheral face of the cable of suction pump and cable aperture, the hole wall anti-gas-leak sealing of the outer wall of gutter and drain hole.
Further, the top section tube wall of described well casing is provided with pipe well recoil hole flushing, and this pipe well recoil hole flushing is with a Valve leakageproofing hermetic seal.
Further, also be provided with the fluid level controller that is used to detect the well casing water level in well casing, described fluid level controller connects and the operation of control suction pump.
Further, be arranged with the section of prolonging strainer on the well casing tube wall above the described strainer.
Further, described on the inboard of the section of prolonging strainer be provided with the section of prolonging vacuum tube, described on the section of prolonging vacuum tube be communicated with the air entry of vacuum pump, and its end section tube wall is provided with at least one closed air inlet.
The effective vacuum dewatering pipe well that the utility model provides, the well casing top is sealed with a well lid anti-gas-leak, and on well lid, be provided with aspirating hole, drain hole and cable aperture, utilize vacuum pump to extract the interior air of well casing when implementing precipitation, make and present the condition of high vacuum degree negative pressure state in the well casing, force water of hydration to break away from the adhesion of soil particle thereby produce powerful gravitation, water of hydration is compiled to pipe well rapidly together in company with gravity water; And because the water inlet of well casing is located at end section, thereby created condition for forming the water body packing, and can in drainage precipitation overall process, remain the negative pressure of vacuum that is not less than 0.08MPa, not only having quickened gravity water compiles to pipe well, and to also having good separating power with the stronger water of hydration of soil particle adhesion, thereby improved soil layer water rate and water outlet efficient, especially in little saturated viscous soil horizon of transmission coefficient and mealiness soil layer, water rate can have been improved 5～20 times; In addition, also obviously enlarged the radius of influence that draws water of this structure pipe well; Reaching under the prerequisite that reduces precipitation target zone water-content indicator, shortening the duration of the operation of drawing water.
Description of drawings
Fig. 1 is the structural representation of the effective vacuum dewatering pipe well of the utility model embodiment.
The specific embodiment
Below in conjunction with description of drawings embodiment of the present utility model is described in further detail, but present embodiment is not limited to the utility model, every employing analog structure of the present utility model and similar variation thereof all should be listed protection domain of the present utility model in.
As shown in Figure 1, a kind of effective vacuum dewatering pipe well that the utility model embodiment is provided, comprise well casing 1, strainer 2, suction pump 10 and vacuum pump (not shown), described vacuum pump is installed on ground, the end section tube wall socket of described strainer 2 and well casing 1, it is characterized in that: the end section tube wall of described well casing 1 is provided with the water inlet 3 that is communicated with strainer 2, described suction pump 10 is installed in the well casing 1, its water sucking mouth is higher than the water inlet 3 of well casing 1, described well casing 1 top seals with a well lid 5 anti-gas-leaks, described well lid 5 is provided with three through holes, is respectively aspirating hole 6, drain hole 7 and cable aperture 8; Be provided with the vacuum tube of a connection vacuum pump air entry in the described aspirating hole 6, the hole wall anti-gas-leak sealing of the outer wall of this vacuum tube and aspirating hole 6; The cable aperture 8 of the cable 11 of described suction pump 10 on well lid 5 drawn well casing, its outfall is connected to a gutter, the drain hole 7 of this gutter on well lid 5 drawn well casing, and the sealing of the hole wall anti-gas-leak of the outer peripheral face of the cable 11 of suction pump 10 and cable aperture 8, the hole wall anti-gas-leak sealing of the outer wall of gutter and drain hole 7;
Among the utility model embodiment, the top section tube wall of described well casing 1 is provided with pipe well recoil hole flushing 9, this pipe well recoil hole flushing 9 usefulness one Valve leakageproofing hermetic seal;
It (is that total water yield is less that the utility model embodiment is implemented on the soil layer that permeability is relatively poor, water yield is less, so that the well casing internal exchange position of catchmenting can not continue to be kept above the precipitation target zone of suction pump position) time, in well casing 1, also be provided with the fluid level controller 12 that is used to detect the well casing water level, described fluid level controller 12 connects and 10 operations of control suction pump, fluid level controller 12 control suction pumps 10 cut out when water level in the well casing 1 is reduced to the setting low water stage, and fluid level controller 12 control suction pumps 10 are opened when water level in the well casing 1 rises to the setting high water level;
When the utility model embodiment implements, can be as required on sheathed on the well casing tube wall above the strainer 2 section of prolonging strainer 13, also can set up the section of prolonging vacuum tube 14 in the inboard of the last section of prolonging strainer 13, the section of prolonging vacuum tube 14 is communicated with the air entry of vacuum pump on described, and its end section tube wall is provided with at least one closed air inlet 15;
Among the utility model embodiment, described well casing 1 is spliced by a plurality of steel tube couplings;
Among the utility model embodiment, described strainer 2 and on the section of prolonging strainer 13 all be sheathed on the well casing outer wall, and the external diameter of strainer 2 with on the external diameter of the section of prolonging strainer 13 identical;
The step of the utility model embodiment installation and precipitation is as follows:
1) be drilled with hole slot on ground, the drilling diameter of hole slot greater than strainer external diameter 300mm or more than, the hole quality control criterion should meet the design document requirement;
2) according to precipitation soil layer physical characteristic index at the suitable strainer 2 of the end of well casing 1 section tube wall socket, twine a strainer etc. as crossing bag net circular hole chimney filter strainer, (bag net) bridge-type chimney filter strainer or (bag net) circular hole chimney filter;
3), determine whether to set up the section of prolonging strainer 13 and reach the section of prolonging vacuum tube 14 according to conditions such as the limiting times of drawing water in advance before base pit engineering border antiseepage environment and the excavation of foundation pit;
4) the first tube coupling with well casing lifts in the hole slot that is drilled with in advance, and by device in holding up well casing is placed the hole slot center, adjunction well casing tube coupling one by one then, until the well casing bottom arrive set the hole at the bottom of absolute altitude; Then between well casing and the hole slot wall, insert filtrate 16 between strainer and the hole slot wall, carry out well-flushing by pipe well recoil hole flushing 9 afterwards, hole flushing 9 sealings after well-flushing finishes recoil pipe well, and above filtrate 16, insert roof clay 17 (or clay ball), try to take out the examination that goes out aqueous condition with pipe well then;
5) suction pump 10 is inserted set depth in the well casing, by setting the accordance that discrepancy in elevation checking position, suction pump water sucking mouth is higher than well casing water inlet 3, and the cable aperture 8 of cable on well lid 5 of suction pump 10 drawn, the drain hole 7 of gutter on well lid 5 that connects its outfall drawn;
6) in the aspirating hole 6 of well lid 5, vacuum tube is installed, and on vacuum tube, a vacuum meter is installed;
7) fluid level controller 12 is inserted set depth in the well casing, and the accordance of checking fluid level controller and suction pump water sucking mouth relative relief, the fluid level controller power line is connected with the suction pump automatic switch of being located at ground via well lid cable aperture 8;
8) vacuum tube is connected with the vacuum pump air inlet pipe, if in the apolegamy during section of prolonging strainer 13, also configurable on the section of prolonging vacuum tube 14, and will on the section of prolonging vacuum tube 14 connect with the air entry of vacuum pump;
9) open vacuum pump well casing is bled, make to present the condition of high vacuum degree negative pressure state in the well casing, force water of hydration to break away from the adhesion of soil particle, water of hydration is compiled to pipe well rapidly together in company with gravity water thereby produce powerful gravitation;
The well casing internal pressure shows by vacuum meter, and the well casing internal pressure that shows when vacuum meter rises to when setting negative pressure value within a short period of time, illustrate comprise well casing vacuum system in order;
10) open when water level in the well casing 1 rises to when setting high water level fluid level controller 12 control suction pumps 10, extract the water that compiles in the well casing out well casing, reduce to when setting low water stage fluid level controller 12 when water level well casing 1 in and control suction pumps 10 and close;
The utility model embodiment as the filtrate silting, can inject water under high pressures or keep applying pressure-air under certain clear water water level condition in well casing and carry out the filtrate backwash, to recover the water permeability of filtrate in pump process by recoil hole flushing 9 of pipe well;
The utility model embodiment at initial operating stage if water yield obviously greater than the water yield of conventional tube well construction, confirm that then underground water and the seepage flow between the well casing in the precipitation target zone have been in unimpeded state, the negative pressure in the well casing has produced the negative pressure graviational interaction to the body of groundwater in the stratum; If the precipitation operation in earlier stage, when vacuum meter continued to demonstrate condition of high vacuum degree, the water yield that is pooled in the well casing was very big, can judge that then the dewatering effect of pipe well manifests; Precipitation moves early stage, although still keep very high vacuum negative pressure condition in the well casing, the water yield that comes together in the well casing can reduce gradually, illustrates that the water content of the precipitation target zone soil body reduces gradually, belongs to normal phenomenon.
Claims (5)
1. effective vacuum dewatering pipe well, comprise well casing, strainer, suction pump and vacuum pump, described vacuum pump is installed on ground, the end section tube wall socket of described strainer and well casing is characterized in that: the end section tube wall of described well casing is provided with the water inlet that is communicated with strainer, and described suction pump is installed in the well casing, its water sucking mouth is higher than the water inlet of well casing, described well casing top seals with a well lid anti-gas-leak, and described well lid is provided with three through holes, is respectively aspirating hole, drain hole and cable aperture; Be provided with the vacuum tube of a connection vacuum pump air entry in the described aspirating hole, the hole wall anti-gas-leak sealing of the outer wall of this vacuum tube and aspirating hole; The cable aperture of the cable of described suction pump on well lid drawn well casing, its outfall is connected to a gutter, the drain hole of this gutter on well lid drawn well casing, and the sealing of the hole wall anti-gas-leak of the outer peripheral face of the cable of suction pump and cable aperture, the hole wall anti-gas-leak sealing of the outer wall of gutter and drain hole.
2. effective vacuum dewatering pipe well according to claim 1 is characterized in that: the top section tube wall of described well casing is provided with pipe well recoil hole flushing, and this pipe well recoil hole flushing is with a Valve leakageproofing hermetic seal.
3. effective vacuum dewatering pipe well according to claim 1 is characterized in that: also be provided with the fluid level controller that is used to detect the well casing water level in well casing, described fluid level controller connects and the operation of control suction pump.
4. effective vacuum dewatering pipe well according to claim 1 is characterized in that: be arranged with the section of prolonging strainer on the well casing tube wall of described strainer top.
5. effective vacuum dewatering pipe well according to claim 4, it is characterized in that: the inboard of the section of prolonging strainer is provided with the section of prolonging vacuum tube on described, the section of prolonging vacuum tube is communicated with the air entry of vacuum pump on described, and its end section tube wall is provided with at least one closed air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010290980324U CN201610552U (en) | 2010-02-08 | 2010-02-08 | Strong vacuum unwatering downcomer well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010290980324U CN201610552U (en) | 2010-02-08 | 2010-02-08 | Strong vacuum unwatering downcomer well |
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| Publication Number | Publication Date |
|---|---|
| CN201610552U true CN201610552U (en) | 2010-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010290980324U Expired - Lifetime CN201610552U (en) | 2010-02-08 | 2010-02-08 | Strong vacuum unwatering downcomer well |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561306A (en) * | 2011-12-30 | 2012-07-11 | 上海广联建设发展有限公司 | Efficient deep-layer vacuum soil body dredging and strengthening method |
| CN105442624A (en) * | 2015-12-29 | 2016-03-30 | 上海广联环境岩土工程股份有限公司 | Gas pumping-injecting interactive type foundation pit precipitation system and precipitation method thereof |
| CN105604076A (en) * | 2016-02-23 | 2016-05-25 | 中国水利水电第十一工程局有限公司 | Vacuum pump water-discharging device suitable for tunnel excavation |
| CN107386308A (en) * | 2017-07-26 | 2017-11-24 | 浙江省工程勘察院 | A kind of side slope slopes automate precipitation method |
| CN108930279A (en) * | 2017-05-27 | 2018-12-04 | 中国二十冶集团有限公司 | Deep foundation pit precipitation pipe well excavates rear enclosed method |
| CN109371998A (en) * | 2018-11-09 | 2019-02-22 | 上海宝钢工程咨询有限公司 | Adjustable precipitation pipe well vacuum sealed devices and the precipitation system for configuring the device |
| CN110439015A (en) * | 2019-08-20 | 2019-11-12 | 中化明达(福建)地质勘测有限公司 | A kind of precipitation well construction with borehole cleaning function |
| CN114108668A (en) * | 2021-12-15 | 2022-03-01 | 中国五冶集团有限公司 | Automatic dewatering system for deep foundation pit |
| CN114134918A (en) * | 2021-11-10 | 2022-03-04 | 上海建工四建集团有限公司 | Use method of full-automatic control type vacuum deep well device |
-
2010
- 2010-02-08 CN CN2010290980324U patent/CN201610552U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561306A (en) * | 2011-12-30 | 2012-07-11 | 上海广联建设发展有限公司 | Efficient deep-layer vacuum soil body dredging and strengthening method |
| CN105442624A (en) * | 2015-12-29 | 2016-03-30 | 上海广联环境岩土工程股份有限公司 | Gas pumping-injecting interactive type foundation pit precipitation system and precipitation method thereof |
| CN105604076A (en) * | 2016-02-23 | 2016-05-25 | 中国水利水电第十一工程局有限公司 | Vacuum pump water-discharging device suitable for tunnel excavation |
| CN108930279B (en) * | 2017-05-27 | 2021-01-15 | 中国二十冶集团有限公司 | Method for sealing deep foundation pit downcast pipe well after excavation |
| CN108930279A (en) * | 2017-05-27 | 2018-12-04 | 中国二十冶集团有限公司 | Deep foundation pit precipitation pipe well excavates rear enclosed method |
| CN107386308A (en) * | 2017-07-26 | 2017-11-24 | 浙江省工程勘察院 | A kind of side slope slopes automate precipitation method |
| CN109371998A (en) * | 2018-11-09 | 2019-02-22 | 上海宝钢工程咨询有限公司 | Adjustable precipitation pipe well vacuum sealed devices and the precipitation system for configuring the device |
| CN110439015A (en) * | 2019-08-20 | 2019-11-12 | 中化明达(福建)地质勘测有限公司 | A kind of precipitation well construction with borehole cleaning function |
| CN110439015B (en) * | 2019-08-20 | 2021-01-12 | 中化明达(福建)地质勘测有限公司 | Precipitation well structure with clear hole function |
| CN114134918A (en) * | 2021-11-10 | 2022-03-04 | 上海建工四建集团有限公司 | Use method of full-automatic control type vacuum deep well device |
| CN114134918B (en) * | 2021-11-10 | 2023-08-08 | 上海建工四建集团有限公司 | Use method of full-automatic control type vacuum deep well device |
| CN114108668A (en) * | 2021-12-15 | 2022-03-01 | 中国五冶集团有限公司 | Automatic dewatering system for deep foundation pit |
| CN114108668B (en) * | 2021-12-15 | 2022-10-21 | 中国五冶集团有限公司 | Automatic dewatering system for deep foundation pit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 201700 Shanghai city Qingpu District No. 599 new road, building 1, room 869 Patentee after: SHANGHAI GUANGLIAN ENVIRONMENTAL & GEOTECHNICAL ENGINEERING CO., LTD. Address before: 201700 Shanghai city Qingpu District No. 599 new road, building 1, room 869 Patentee before: Shanghai Guanglian Building Development Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101020 |