CN1054463A - Radial that foundation dewatering is used and construction technology and equipment - Google Patents
Radial that foundation dewatering is used and construction technology and equipment Download PDFInfo
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- CN1054463A CN1054463A CN 91100830 CN91100830A CN1054463A CN 1054463 A CN1054463 A CN 1054463A CN 91100830 CN91100830 CN 91100830 CN 91100830 A CN91100830 A CN 91100830A CN 1054463 A CN1054463 A CN 1054463A
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- pipe
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Abstract
The invention provides the radial that a kind of foundation dewatering is used, it is to be made of with steel pipe or the plastics horizontal filtration pipe that same elevation place or different elevations place around hoistway wall put in the aquifer the large diameter reinforced concrete vertical shaft pipe of a bite.And provide a kind of construction technology simpler, can throw different filter pipes into, and filter pipe silting not, do not destroyed the pipe bit of original infiltrative construction technology in stratum and construction plastics horizontal filtration pipe at all kinds of scalls.Radial well dewatering provided by the invention is more effective than traditional precipitation method, cost is low, compliance is strong, and it is applicable to various geology, particularly large tracts of land and deep foundation precipitation.
Description
The invention belongs to technical field of buildings, it relates to a kind of technology that keeps underground foundation dry application worker.
The method that is used for foundation dewatering at present has light well point method, heavy well point method, by freezing soil and use methods such as underground protecting wall.All there is different shortcomings in these methods, and its light well point method only is applicable to the basis of weak water permeability soil layer, are covered with the well point around the basis and are connected with drainage pipeline networks.Heavy well point (pipe well) is applicable to basis, water permeability stratum preferably, and pipe well is around basal perimeter, and a well is installed a pump and drawn water.These two kinds of precipitation methods, particularly large tracts of land deep foundation precipitation, the well point need be arranged on basic internal, manages pretty troublesomely, and construction is disturbed big.Near the foundation dewatering of river by the location, often adopt the method for underground protecting wall, promptly erect the reinforced concrete earthen wall all around on the basis, to impervious layer, the water that will pour into the basis cuts off, construction again, this method is great in constructing amount, and is expensive huge.In addition, the method for freezing soil is to reduce the temperature of soil by electricity, makes it to freeze, and this method power consumption is surprising, is extremely uneconomic, and use is restricted.
In " radial " (1969) book of Willie Mu Kaer work, mention: " the radial technology can be used for foundation dewatering ", but do not see the report of relevant application facet flesh and blood so far.
So-called radial (The Redial Collector Well) be the large diameter vertical shaft of a bite and from hoistway wall to around put in the horizontal tube composition in aquifer, in order to compile underground water.Radial structure in the practical application, the vertical shaft diameter of U.S. design is a 5-6 rice, in 30 meters of the well depths, 200 millimeters of horizontal tube diameter phi are made by alloy-steel plate; The radial of Japanese Design and the U.S. approaching; In the designed radial vertical shaft diameter 2.5-5 rice of domestic Shaanxi water section, 50 meters of well depths, horizontal direction is the mud hole.The radial construction technology difference of various structures differs greatly, and drop shaft sinking is adopted in U.S.'s vertical shaft construction, and the horizontal tube construction advances with 300 tons of jack; Boring is adopted in the vertical shaft construction of domestic Shaanxi institute of water section, percussion and grabbing method, floating pipe down, the construction technology that the lateral aperture construction is dashed with half mechanical half manpower and water under high pressure.
The radial technology just proposed as far back as the thirties, but because external radial diameter is bigger, construction is complicated, involve great expense and do not have to solve material and the job practices problem of throwing horizontal tube at flour sand layer, light sandy loam layer into, its range of application is restricted, be used for underground water seedbed water supply well at U.S.'s radial, intercept the underground water that enriches in the riverbed.The radial that domestic in recent years Shaanxi water section is studied is suitable for Cheng Jing in loess and the fissured clay layer, is used for farmland irrigating drainage.
The objective of the invention is to provide a kind of total cost lower, dewatering effect is good, be applicable to the radial that various geological foundation precipitation are used, and provide a kind of construction technology simpler, can throw different filter pipes at all kinds of scalls, and filter pipe is silting not, does not destroy original infiltrative construction technology in stratum and the effective unusual casing drill bit of construction level.
The present invention is achieved in that according to the hydrogeological conditions in precipitation area and surface water situation on the side on basis or diagonal or arrange that all around one or more put in the radial that the horizontal filtration pipe in aquifer is formed by the large diameter vertical shaft of a bite and same elevation place or different elevations place around hoistway wall, the horizontal filtration pipe of radial can be the steel pipe that the surface has some apertures, also can be the plastic pipe that there are some apertures on the surface.Block the underground water that all directions are poured into the basis by horizontal filtration pipe, thereby underground water is come together in the vertical shaft, with water plug the underground water in the vertical shaft is discharged again, to keep foundation ditch scope of operation drying.
Construction technology: bore a vertical shaft hole with common rig, adopt floating method with under the prefabricated concrete reinforced pipe in well, with direct jacking the steel horizontal filtration pipe is squeezed into the aquifer from hoistway wall again, or plastic pipe is put into the aquifer with tiretube process.
The used drill bit of tiretube process is special, is made up of bullet-shaped housing, main body, pendulum key three parts.Its housing is welded with scraper outward, and front end has the hole of 20 millimeters of φ, and there is a non retern valve at the rear portion in hole, water under high pressure is penetrated by the non retern valve outlet by drilling rod, washes away the stratum, and sleeve pipe is advanced, when entering after the degree of depth reaches designing requirement, plastic pipe is inserted in the sleeve pipe, again sleeve pipe is extracted.
Good effect of the present invention:
1. compliance is strong.Applicable to all kinds of stratum, different area and precipitation depth, particularly large-scale excavation more help well spacing, also do not influence construction.Horizontal filtration pipe can set in different vertical positions and different horizontal depth according to foundation soil characteristics and foundation ditch requirement, thereby can reduce to the bigger degree of depth to underground water.
2. precipitation speed is fast.Under the effect of the horizontal filtration pipe of radial, the underground water in the foundation ditch is to ooze to filter pipe with the gravity water form, and row is in vertical shaft, and because of the filter pipe level of throwing into is many, density is big, and the underground water seepage paths is lacked, so dewatering effect is good.
3. the peripheral well spacing in gene basis is few, so can not disturb the normal construction of foundation excavation and other object of construction production.
4. construction technology provided by the invention is not more than 150 millimeters stratum at soil layer, layer of sand, sand gravel layer and cobble particle diameter, about 50 meters holes that can not collapse of drilling depth.
5. pipe bit provided by the invention can be long with tens of rice, put into the aquifer as the plastic flexible pipe of horizontal filtration pipe, solved the technical barrier of fine sand layer, flour sand layer, light sandy loam layer foundation dewatering.
6. the method for foundation dewatering of the present invention is lower than traditional precipitation method cost.
In addition, after building construction finished, large diameter vertical shaft also can transform sewage and ight soil storage vault into.
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Fig. 1 is the schematic diagram of radial embodiment of the present invention;
Fig. 2 creeps into schematic diagram for the vertical shaft construction of radial of the present invention;
Fig. 3 is the lateral view of radial horizontal filtration pipe construction of the present invention with pipe bit.
Fig. 4 is the front view of radial horizontal filtration pipe construction of the present invention with pipe bit.
Radial shown in Fig. 1 (1) is by 2.9 meters of external diameter φ, 2.6 meters of internal diameter φ, long 1 meter concrete reinforced pipe constitutes with the horizontal filtration pipe (3) that same elevation or different elevations place around hoistway wall put in the aquifer being connected into dark vertical shaft (2) below 50 meters.Horizontal filtration pipe has two kinds, a kind of is long 1 meter, diameter is not more than 108 millimeters of φ, it is 15～30 meters that two ends have the steel pipe of internal and external screw thread to connect into length overall respectively, the first pipe joint front end that wherein enters the aquifer is shell shape, every joint steel tube surface has the circular hole of 6～8 millimeters of φ or 2 millimeters cylindrical void, its perforated area account for tube surface long-pending 3～5%; Another kind is two screw thread plastic pipes of 89 millimeters of commercially available diameter phi 60 or φ 76 or φ, and the front end of pipe has a steel plug, and many rounds eye is arranged in the tube wall trough, and eyelet is twined silk or nylon net cloth drainage cover covers, and enters in the pipe to prevent the stratum fine sand.
The construction technology of radial:
2.9 meters of-prefabricated external diameter φ, 2.6 meters of internal diameter φ, long 1 meter the tens of joints of concrete reinforced pipe, a wherein end of pipe joint sealing is provided with at needs on the vertical shaft tube wall of horizontal filtration pipe and boxes out.
-vertical shaft construction technology
As shown in Figure 2, borer drill rod (6) drives drill bit (7) rotation of its diameter greater than the vertical shaft diameter, by the scraper on the drill bit stratum is scraped, with gravel pump (4) clod, sandstone, the water that scrapes is entered in the mud pit (5) together, allow the sandstone clod precipitate, mud is back in the boring, 0.15 kilograms per centimeter in the retaining hole
2Hydrostatic pressure.And according to the different mud balance of geological condition maintenance, when when the flour sand layer creeps into, keeping mud balance is 1.04, can satisfy with natural pulping; During the layer of sand drilling well, drop into artificial mud in the hole, keeping mud balance is 1.08; When in lam, argillic horizon, creeping into, need constantly in the hole, to add clear water thin mud, also cry and change slurry.
After drilling depth reaches designing requirement, adopt floating method that prefabricated reinforced concrete well tube one is hung successively in the hole, each pipe joint mouth seam crossing seals with waterproofing materials, with soil hole wall and the peripheral space of well casing is tamped, drain the well casing internal water, in order to the construction level filter pipe.
-horizontal filtration pipe construction technology
Direct jacking: when the aquifer is strong permeable formation such as medium sand, medium coarse sand, sand gravel, sandy gravel, horizontal filtration pipe adopts steel pipe, with horizontal drill with the direct jacking of steel pipe aquifer, the first segment that enters the aquifer is for there being bullet shaped pipe, jacking length is relevant with aquifer structure, is generally 15～30 meters.
Tiretube process: when the aquifer is middle fine sand, fine sand, the powder fine sand, flour sand, light sandy loam, during weak permeable formation such as light loam, the two screw thread plastic pipes of horizontal filtration pipe, construction drilling tool such as Fig. 3, pipe bit shown in Fig. 4 (22), this drill bit length overall is 350 millimeters, by housing (8), pendulum key (17), main body (19) part is formed, its housing (8) is shell shape pipe, three arc scrapers (9) are arranged on the housing outer wall, there is the hole of 20 millimeters of φ on the housing top, one check valve seat (12) is arranged behind the hole, on the check valve rod (11) on the valve seat spring (10) is arranged, there are 2 pendulum keys (17) to be positioned at housing (8) inwall both sides below the valve, pendulum key (17) is connected on the housing (8) by a taper pin (15), taper pin is connected with securing member with an end of spring leaf (14), and the other end is pressed on the projection (13) of housing (8) inwall; Drill main body (19) is a reduced pipe, a large diameter end and sealing clamping sleeve (21) screwed connection that internal and external screw thread is arranged, one rubber bellows seal cover (20) is arranged between the two, the inside pipe wall projection that sealing shroud is above, the pipe of projection is with groove outward, and an O-ring seal (18) is arranged in the groove, and housing (8) lower end is enclosed within outside the O-ring seal (18), pendulum key (17) blocks main body (19) tubule footpath outer wall, housing (8) and main body (19) is tightly linked to each other constitute one.
During construction, open the preformed hole cover plate on the hoistway wall, load onto hermetic seal and end the sand device, with 146 millimeters of previously prepared φ, long 1 meter pillar pushes in the hole, again pipe bit (22) is contained in 89 millimeters of previously prepared φ, on the joint in tens of joint sleeve pipes of long 1 meter, the other end of sleeve pipe is connected with the rig axle, start rig, water under high pressure is penetrated by non retern valve (11) outlet by borer drill rod, washing away the stratum makes sleeve pipe enter the aquifer, stopping water under high pressure non retern valve (11) closes, connect another joint sleeve pipe, repeat above operation sleeve pipe one is squeezed into the aquifer successively, when sleeve pipe enters after length reaches designing requirement, the plastic filter pipe that needs length is inserted in the sleeve pipe, promote the steel plug of filter pipe front end with Metallic rod, pendulum key (17) the pressuring spring sheet (14) of squeezing bushing drill bit, pendulum key (17) leaves main body (19), housing (8) and main body (19) are thrown off, water in the aquifer enters in the filter pipe at this moment, and mud, sand is stoped in the slit that can not enter outside sleeve pipe between sleeve pipe and the filter pipe by rubber bellows seal cover (20), to guarantee that horizontal drill successfully extracts sleeve pipe one successively, use the space between cover closure filter pipe and the preformed hole at last.
Job practices of the present invention has only been narrated a kind of plastic screwed pipe of specification, and the pipe that also available φ 76, φ are 89 millimeters only need change drill bit and casing diameter during construction.
Claims (9)
1, the radial (1) used of a kind of foundation dewatering, it is characterized in that: be not more than 3 meters by a bite diameter, being not more than 50 meters vertical shaft (2) deeply constitutes with minor-diameter steel-tube or the plastics horizontal filtration pipe (3) that same elevation place or different elevations place around hoistway wall put in the aquifer, steel horizontal filtration pipe diameter is not more than 108 millimeters of φ, long 15～30 meters; The plastics horizontal filtration pipe is the two screwed pipes of diameter phi below 89 millimeters, and long 40～70 meters, the space seals with waterproofing materials between horizontal filtration pipe (3) and hoistway wall preformed hole.
2, according to the radial of claim 1, it is characterized in that: described vertical shaft (2) by tens of joint concrete reinforced pipes to being connected into, each mouth of pipe seam crossing seals with waterproofing materials, a joint bottom sealing in shaft bottom, and other is provided with at needs on the hoistway wall (2) of horizontal filtration pipe boxes out.
3, according to the radial of claim 1, it is characterized in that: described steel horizontal filtration pipe (3) has the steel pipe of internal and external screw thread to connect into respectively by tens of joints two ends, the first segment front end that wherein enters the aquifer is shell shape, every joint steel tube surface has some small sircle holes or slotted hole, its perforated area account for tube surface long-pending 3～5%.
4, according to the radial of claim 1, it is characterized in that: described plastics horizontal filtration pipe (3) is two screwed pipes, and the front end of pipe has a steel plug, and many rounds eye is arranged in the tube wall trough, and eyelet is twined wire cover and lives or covered by nylon net cloth drainage cover.
5, a kind of radial construction technology of claim 1, it comprises:
-prefabricated vertical shaft pipe (2);
The boring of-rig, vertical shaft pipe (2) under the floating method;
-with the direct jacking steel of horizontal drill horizontal filtration pipe (3),
It is characterized in that it also comprises:
-use reverse circulation drilling machine drill vertical shaft hole, the clod, sandstone, the water that rig drill bit (7) are scraped with gravel pump (4) enter mud pit (5) together, and the mud in the mud pit passes back in the boring, 0.15 kilograms per centimeter in the retaining hole
2Hydrostatic pressure;
The construction of-plastics horizontal filtration pipe
The preparation diameter has the tens of joints of sleeve pipe of internal and external screw thread and the one section diameter pillar greater than sleeve pipe respectively greater than horizontal filtration pipe and two ends,
Open the preformed hole cover plate on the hoistway wall, load onto hermetic seal and end the sand device, pillar is pushed in the hole,
Tubing drill bit (22) on casing joint, the other end of sleeve pipe is connected with the rig axle, starts rig, and water under high pressure is penetrated by non retern valve (11) outlet of pipe bit by drilling rod, washes away the stratum, makes sleeve pipe enter the aquifer,
Stop water under high pressure, on sleeve pipe, connect another joint sleeve pipe, repeat to be operated to and enter length and reach designing requirement,
Horizontal filtration pipe is inserted in the sleeve pipe,
Metallic rod is inserted in the horizontal filtration pipe, promoted the steel plug of pipe front end, and pendulum key (17) the pressuring spring sheet (14) of squeezing bushing drill bit, housing (8) and main body (19) are thrown off,
Sleeve pipe is all extracted the space between sealing horizontal filtration pipe and the vertical shaft preformed hole with horizontal drill.
6, according to the radial construction technology of claim 5, it is characterized in that: described vertical shaft boring, when in the layer of sand drilling well, in the hole, drop into artificial mud, be 1.08 to keep mud balance.
7, according to the radial construction technology of claim 5, it is characterized in that: described vertical shaft boring when creeping into, needs constantly to add clear water dilution mud in the hole in lam, argillic horizon.
8, according to the radial construction technology of claim 5, it is characterized in that: described vertical shaft boring, when when the flour sand layer creeps into, with natural pulping, keeping mud balance is 1.04.
9, a kind of radial construction pipe bit of claim 5, it is characterized in that: this drill bit is by housing (8), pendulum key (17), main body (19) part is formed, its housing (8) is shell shape pipe, three arc scrapers (9) are arranged on the housing outer wall, there is the hole of 20 millimeters of φ on the housing top, one check valve seat (12) is arranged behind the hole, on the check valve rod (11) on the valve seat spring (10) is arranged, there are 2 pendulum keys (17) to be positioned at housing (8) inwall both sides below the valve, pendulum key (17) is connected on the housing (8) by taper pin (15), taper pin (15) is connected with securing member with an end of spring leaf (14), the other end is pressed on the projection (13) of housing (8) inwall, drill main body (19) is a reduced pipe, in a large diameter end has internal thread and has, externally threaded sealing clamping sleeve (21) connects, one rubber bellows seal cover (20) is arranged between the two, the inside pipe wall projection that sealing shroud is above, the pipe of projection is with groove outward, one O-ring seal (18) is arranged in the groove, housing (8) lower end is enclosed within outside the O-ring seal (18), pendulum key (17) blocks main body (19) tubule footpath outer wall, housing (8) and main body (19) is tightly linked to each other constitute one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91100830 CN1017459B (en) | 1991-02-13 | 1991-02-13 | Radial well for lowering level of ground water in foundation, and construction technology and apparatus thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91100830 CN1017459B (en) | 1991-02-13 | 1991-02-13 | Radial well for lowering level of ground water in foundation, and construction technology and apparatus thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1054463A true CN1054463A (en) | 1991-09-11 |
| CN1017459B CN1017459B (en) | 1992-07-15 |
Family
ID=4904849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91100830 Expired CN1017459B (en) | 1991-02-13 | 1991-02-13 | Radial well for lowering level of ground water in foundation, and construction technology and apparatus thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1017459B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493808A (en) * | 2011-12-06 | 2012-06-13 | 林志兴 | Method for digging deep well manually |
| CN102937001A (en) * | 2012-11-23 | 2013-02-20 | 中国水利水电科学研究院 | Well completion process of sandy cobble stratum radial well |
| CN103243776A (en) * | 2012-02-14 | 2013-08-14 | 日本那贺株式会社 | Construction method for radial water collecting well provided with wire-wrapping filter |
| CN105041205A (en) * | 2015-07-02 | 2015-11-11 | 中国地质大学（北京） | Multi-radiation well drilling networking water supply method |
| CN105041203A (en) * | 2015-07-02 | 2015-11-11 | 中国地质大学（北京） | Radiation well drilling process |
| CN105649097A (en) * | 2015-12-29 | 2016-06-08 | 上海广联环境岩土工程股份有限公司 | Foundation pit dewatering pipe well based on environment control |
| CN105865087A (en) * | 2016-05-25 | 2016-08-17 | 绍兴市恒源空调设备有限公司 | Centralized heat source side water supply system for water source heat pump unit |
| CN107542998A (en) * | 2016-06-28 | 2018-01-05 | 中国二十冶集团有限公司 | Increase the construction method of branch line newly on original buried pipeline |
| CN112028406A (en) * | 2020-09-08 | 2020-12-04 | 中煤科工集团西安研究院有限公司 | Underground water in-situ remediation device and method based on directional drilling |
| CN113186962A (en) * | 2021-05-25 | 2021-07-30 | 中建五局华东建设有限公司 | Well point dewatering method and device suitable for soft land |
| CN113294087A (en) * | 2021-05-25 | 2021-08-24 | 中国电建市政建设集团有限公司 | Sand gravel geological layer steel pipe well dewatering construction system and construction method thereof |
| CN115126409A (en) * | 2022-08-30 | 2022-09-30 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Monitoring well construction process and direct-pushing well forming tool thereof |
| CN116290047A (en) * | 2023-02-28 | 2023-06-23 | 中建八局第三建设有限公司 | Automatic-monitoring deep foundation pit transverse connection type net-shaped precipitation construction method |
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| CN101871348B (en) * | 2010-06-11 | 2011-08-10 | 山东科技大学 | Water-conducting and pressure-releasing type composite well wall of vertical shaft and construction method thereof |
-
1991
- 1991-02-13 CN CN 91100830 patent/CN1017459B/en not_active Expired
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493808A (en) * | 2011-12-06 | 2012-06-13 | 林志兴 | Method for digging deep well manually |
| CN103243776A (en) * | 2012-02-14 | 2013-08-14 | 日本那贺株式会社 | Construction method for radial water collecting well provided with wire-wrapping filter |
| CN102937001A (en) * | 2012-11-23 | 2013-02-20 | 中国水利水电科学研究院 | Well completion process of sandy cobble stratum radial well |
| CN102937001B (en) * | 2012-11-23 | 2016-05-11 | 中国水利水电科学研究院 | Sand-pebble layer radial well drilling technology |
| CN105041205A (en) * | 2015-07-02 | 2015-11-11 | 中国地质大学（北京） | Multi-radiation well drilling networking water supply method |
| CN105041203A (en) * | 2015-07-02 | 2015-11-11 | 中国地质大学（北京） | Radiation well drilling process |
| CN105649097A (en) * | 2015-12-29 | 2016-06-08 | 上海广联环境岩土工程股份有限公司 | Foundation pit dewatering pipe well based on environment control |
| CN105865087A (en) * | 2016-05-25 | 2016-08-17 | 绍兴市恒源空调设备有限公司 | Centralized heat source side water supply system for water source heat pump unit |
| CN107542998A (en) * | 2016-06-28 | 2018-01-05 | 中国二十冶集团有限公司 | Increase the construction method of branch line newly on original buried pipeline |
| CN112028406A (en) * | 2020-09-08 | 2020-12-04 | 中煤科工集团西安研究院有限公司 | Underground water in-situ remediation device and method based on directional drilling |
| CN112028406B (en) * | 2020-09-08 | 2022-11-25 | 中煤科工集团西安研究院有限公司 | Underground water in-situ remediation device and method based on directional drilling |
| CN113186962A (en) * | 2021-05-25 | 2021-07-30 | 中建五局华东建设有限公司 | Well point dewatering method and device suitable for soft land |
| CN113294087A (en) * | 2021-05-25 | 2021-08-24 | 中国电建市政建设集团有限公司 | Sand gravel geological layer steel pipe well dewatering construction system and construction method thereof |
| CN113186962B (en) * | 2021-05-25 | 2023-06-02 | 中建五局华东建设有限公司 | Well point dewatering method and device suitable for soft soil |
| CN115126409A (en) * | 2022-08-30 | 2022-09-30 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Monitoring well construction process and direct-pushing well forming tool thereof |
| CN116290047A (en) * | 2023-02-28 | 2023-06-23 | 中建八局第三建设有限公司 | Automatic-monitoring deep foundation pit transverse connection type net-shaped precipitation construction method |
| CN116290047B (en) * | 2023-02-28 | 2023-10-13 | 中建八局第三建设有限公司 | Automatic-monitoring deep foundation pit transverse connection type net-shaped precipitation construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1017459B (en) | 1992-07-15 |
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