CN202809665U - Blocking device for relief well of micro artesian water in foundation pit - Google Patents
Blocking device for relief well of micro artesian water in foundation pit Download PDFInfo
- Publication number
- CN202809665U CN202809665U CN 201220316903 CN201220316903U CN202809665U CN 202809665 U CN202809665 U CN 202809665U CN 201220316903 CN201220316903 CN 201220316903 CN 201220316903 U CN201220316903 U CN 201220316903U CN 202809665 U CN202809665 U CN 202809665U
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- well casing
- well
- foundation ditch
- locking device
- pipe
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Abstract
The utility model relates to a blocking device for a relief well of micro artesian water in a foundation pit. The blocking device comprises a well casing and a filter at the lower part of the well casing, and is characterized by further comprising a bedding layer, a press plate, a grouting pipe and a sealing steel plate, wherein coarse sand is filled between the bottom of the well casing and the filter; the press plate is arranged in the well casing and fixed on the grouting pipe; the grouting pipe extends into the well casing through the pipe orifice of the well casing so as to inject grout, and the grout permeates the coarse sand through gaps to the periphery of the filter at the bottom of the well casing; concrete is filled on the coarse sand till the bedding layer; and the pipe orifice of the well casing is welded and sealed by the sealing steel plate. The blocking device solves the problems of leakage, sudden burst, settlement and the like of the relief well of micro artesian water and avoids land subsidence of surroundings.
Description
Technical field
The utility model relates to little decompression of confined water well sealing technique field in the novel foundation ditch, specifically, relates to a kind of locking device for little decompression of confined water well in the foundation pit dewatering later stage foundation ditch.
Background technology
Base pit engineering is for excavating the earthwork at engineering underground device place, guarantees foundation ditch and safety of surrounding environment and the general name of the engineering measures such as going along with sb. to guard him of taking, support, precipitation, reinforcing, shoveling and backfill, comprises prospecting, design, construction, detection and monitors.Foundation pit dewatering is at the inside and outside well casing of burying underground of foundation ditch, utilizes plant equipment to draw water, the precipitation method that groundwater level is reduced.Little artesian water buries shallow, large to base pit engineering harm, the little decompression of confined water precipitation of foundation pit dewatering is larger on the surrounding enviroment impact, especially little artesian water seals link in the hole, the hardship of eating is more, even the building that has is built up and also can be occurred little decompression of confined water well after 10 years and underground Shuitu partly occurs and gush and emit the sand phenomenon.
Little decompression of confined water well sealing is important step in the foundation pit dewatering project, purpose is little decompression of confined water well sealing and the local waterproof problem of engineering in the hole that solves in the dewatering project, guarantee the continuity of base plate strength, guarantee that seepage, prominent gushing and the depression problem do not appear in little decompression of confined water well position in the engineering use procedure.
Existing enclosure method comprises: insert clay, cut off well casing, dial except methods such as well casings.These methods are all inapplicable for little decompression of confined water well sealing in the hole.Insert clay and do not carry out slip casting, do not resist the artesian water head pressure, the mobile meeting of artesian water causes the clay of inserting to run off, and more can cause relatively large clay to make somebody a mere figurehead and cause well casing well space to cause the sedimentation of next stage; Cut off well casing and can cause artesian water that Foundation Pit Pouring is destroyed, the disastrous effect that well casing mouth flowing water again can't stop; Dial except well casing cost height, efficient is low, and backfill causes artificial destruction because flowing of artesian water can't put in place to base plate of foundation pit.Owing to can't solve the closed question of little decompression of confined water well in the foundation ditch, the foundation pit dewatering design is arranged in little decompression of confined water well outside the foundation ditch, cause the foundation pit dewatering workload to increase, the surface settlement impact that foundation pit dewatering causes is large, to base pit engineering cause economically pressure and the infringement on the environment, social influence is abominable.For base pit engineering safety, economy and environment benefit, the foundation pit dewatering design must be arranged in little decompression of confined water well in the foundation ditch, so little decompression of confined water well sealing requires to be solved in the foundation ditch.
The construction project foundation depth was more and more darker in the last few years, it is not within minority to pass through artesian aquifer, a lot of base plate of foundation pit from the artesian aquifer top board more and more close to, solution is the little decompression of confined water precipitation of foundation ditch, in order to guarantee base plate of foundation pit construction and foundation ditch waterproof construction, relief well must draw water and be maintained to underplate concrete intensity and reach and just can stop after 80% of design requires in the foundation ditch, comes on the agent structure that the sealing to little decompression of confined water well in the foundation ditch brings difficulty after a period of time.In order to ensure little decompression of confined water well sealing effect in the hole, little decompression of confined water well locking device in the invention one cover foundation ditch.
The utility model content
The purpose of this utility model provides a kind of well casing that do not need to pull out; and can guarantee the locking device of little decompression of confined water well sealing effect in the foundation ditch; realizing that little decompression of confined water well position does not occur under seepage, the prominent prerequisite of gushing with the construction requirement of depression problem; also can cause unnecessary harm to environment, and cost is relatively low.
The purpose of this utility model is achieved in that
Little decompression of confined water well locking device in a kind of foundation ditch, comprise well casing, the well casing lower filter, it is characterized in that: described locking device comprises bed course, pressing plate, Grouting Pipe and sealing steel plate, fill coarse sand from bottom to the strainer top of described well casing, one block pressur plate is set in the well casing to be fixed on the Grouting Pipe, described Grouting Pipe stretches into well casing and injected water mud through the mouth of pipe of well casing, the gap that makes cement paste pass through coarse sand is infiltrated around the strainer of well casing bottom, to described bed course place, the mouth of pipe place of described well casing is by sealing steel plate sealing at described coarse sand top fill concrete.
Wherein, the pressing plate that arranges in the described well casing is positioned at 1m place under the described bed course.After slip casting is finished, after cement paste reaches the time of initial set, extract the above residual water of well casing clip plate out.Wherein, described pressing plate is fixed on the described Grouting Pipe, can described pressing plate be sent in the well casing by Grouting Pipe, and be positioned at the design height place of pressing plate.
Further, built large base plate on the described bed course; Also be welded with the twice sealing piece in the described well casing outside, described large base plate and sealing piece are cast in together.Wherein, described sealing piece race diameter φ 600-800mm, thickness is 4-12mm; Described Grouting Pipe is fixed on the mouth of pipe place of described well casing by reinforcing bar.
Further, the upper surface of the mouth of pipe of described well casing is lower than the upper surface of described large base plate, and the mouth of pipe of described sealing steel plate sealing well casing is embedded in the described large base plate, to reach smooth effect.
The utility model is owing to adopted technique scheme, compared with prior art have following beneficial effect: the utility model is by filling coarse sand and by Grouting Pipe cement paste being injected in the well casing in well casing, so that the space of well casing bottom is sealed fully, not only can resist the artesian water head pressure, and prevented the filler loss, avoid causing sedimentation.Little decompression of confined water well locking device has solved little decompression of confined water well position and seepage, prominent gushing and the problem such as depression have occurred in the utility model foundation ditch, avoids surrounding enviroment are caused surface settlement.
Description of drawings
By following embodiments of the invention and description taken together with the accompanying drawings, other advantage of the present invention and feature are shown, this embodiment provides with the form of example, but is not limited to this, wherein:
Fig. 1 is the device schematic diagram of an embodiment of little decompression of confined water well locking device in a kind of foundation ditch of the utility model;
Fig. 2 is the operating mode schematic diagram when the welding sealing piece embodiment illustrated in fig. 1;
Fig. 3 is the operating mode schematic diagram when large bottom slab concreting embodiment illustrated in fig. 1;
Operating mode schematic diagram when Fig. 4 is filling slip casting embodiment illustrated in fig. 1;
Fig. 5 is the device schematic diagram of another embodiment of little decompression of confined water well locking device in a kind of foundation ditch of the utility model.
The specific embodiment
As shown in Figure 1, little decompression of confined water well locking device in a kind of foundation ditch, comprise well casing 1, well casing 1 bottom is provided with strainer, locking device comprises bed course 2, large base plate 3, sealing piece 4, Grouting Pipe 5 and sealing steel plate 6, well casing 1 outside is welded with twice sealing piece 4, build large base plate 3 on the bed course 2, large base plate 3 and sealing piece 4 are cast in together, fill coarse sand 7 from bottom to the strainer top of well casing 1, the well casing 1 interior block pressur plate 9 that arranges is fixed on the Grouting Pipe 5, Grouting Pipe 5 stretches into well casing 1 and injected water mud through the mouth of pipe of well casing, the gap that makes cement paste pass through coarse sand 7 is infiltrated around the strainer of well casing 1 bottom, and to large base plate 3 places, the mouth of pipe place of well casing 1 is by sealing steel plate 6 sealings at coarse sand 7 top fill concretes 8.
Wherein, sealing piece 4 race diameter φ 600-800mm, thickness is 4-12mm; Grouting Pipe 5 is fixed on the mouth of pipe place of well casing 1 by reinforcing bar.The pressing plate 9 of well casing 1 interior setting is positioned at 2 times 1m places of bed course.After slip casting is finished, after cement paste reaches the time of initial set, extract the residual water of well casing clip plate more than 9 out.Wherein, pressing plate 9 is fixed on the Grouting Pipe 5, can pressing plate 9 be sent in the well casing 1 by Grouting Pipe 5, and be positioned at the design height place of pressing plate 9.
Further, the upper surface of the mouth of pipe of well casing 1 is lower than the upper surface of large base plate 3, and the mouth of pipe of sealing steel plate 6 sealing well casings 1 is embedded in the large base plate 3, to reach smooth effect.
The course of work of the present utility model following (referring to Fig. 2 to Fig. 4):
When foundation ditch digs to design elevation, at base plate place well casing outside weld two road sealing pieces, sealing piece race diameter φ 600～800mm, thick 6mm.Before the relief well sealing work of little artesian water, stir in advance first 1.00m
3About cement paste, water/binder ratio 0.4～0.5.Insert coarse sand in the well casing, the backfill height of coarse sand covers the strainer part about the following 5.00m～6.00m of base plate of foundation pit.Be lowered to Grouting Pipe in the well casing, the bottom depth of setting of Grouting Pipe is from about the above 0.50m of backfill height of coarse sand.A pressing plate is set in well casing, is connected with Grouting Pipe and is sent in the well by Grouting Pipe, the placement degree of depth of pressing plate is 1m place under bed course greatly, and pressing plate is fixed on the Grouting Pipe.The well casing mouth supports with reinforcing bar before the formal slip casting, and Grouting Pipe is fixed, and then begins slip casting, mixes 2% water glass accelerated solidification in the cement paste, requires the slit of strainer is blocked the space infiltration bottom filters of cement paste by coarse sand during slip casting on every side.Slip casting is complete, after cement paste reaches the time of initial set, extracts the above residual water of well casing clip plate out, and in time observes the interior water level depth of well casing or the situation of change of absolute altitude.General observation is after 6 hours, and the water level in the well casing illustrates that without obvious rising the effect of slip casting is better.After judgement has reached the effect of slip casting, can prescind the well casing that all expose.Then i.e. penetration concrete in the well casing, the concrete height that pours into is a little less than the about 10cm of base plate of foundation pit concrete surface.Filling concrete finishes, and in time observes the situation of change of water level in the well casing.The initial set for the treatment of the well casing inner concrete can meet the requirements, and the actual effect that can the determine shutoff unnecessary water of rear extraction that meets the demands, and at mouth of pipe iron plate sealing, the mouth of pipe is lower than about the following 5cm of base concrete face.Behind the mouth of pipe sealing, it is floating to insert hole with cement mortar, and the relief well sealing work of little artesian water is complete.
Embodiment as shown in Figure 5 is the simplified structure of last embodiment.Comprise well casing 1, well casing 1 bottom is provided with strainer, locking device comprises bed course 2, Grouting Pipe 5 and sealing steel plate 6, fill coarse sand 7 from bottom to the strainer top of well casing 1, the well casing 1 interior block pressur plate 9 that arranges is fixed on the Grouting Pipe 5, Grouting Pipe 5 stretches into well casing 1 and injected water mud through the mouth of pipe of well casing, mix 2% water glass accelerated solidification in the cement paste, the gap that makes cement paste pass through coarse sand 7 is infiltrated around the strainer of well casing 1 bottom, to bed course 2 places, the mouth of pipe place of well casing 1 is by sealing steel plate 6 sealings at coarse sand 7 top fill concretes 8.
Claims (9)
1. little decompression of confined water well locking device in the foundation ditch, comprise well casing, the well casing lower filter, it is characterized in that: described locking device comprises bed course, pressing plate, Grouting Pipe and sealing steel plate, fill coarse sand from bottom to the strainer top of described well casing, one block pressur plate is set in the well casing to be fixed on the Grouting Pipe, described Grouting Pipe stretches into well casing and injected water mud through the mouth of pipe of well casing, the gap that makes cement paste pass through coarse sand is infiltrated around the strainer of well casing bottom, to described bed course place, the mouth of pipe place of described well casing is by sealing steel plate sealing at described coarse sand top fill concrete.
2. little decompression of confined water well locking device in the foundation ditch as claimed in claim 1, it is characterized in that: the pressing plate that arranges in the described well casing is positioned at 1m place under the described bed course.
3. little decompression of confined water well locking device in the foundation ditch as claimed in claim 1 is characterized in that: built large base plate on the described bed course.
4. little decompression of confined water well locking device in the foundation ditch as claimed in claim 3 is characterized in that: also be welded with the twice sealing piece in the described well casing outside.
5. little decompression of confined water well locking device in the foundation ditch as claimed in claim 4, it is characterized in that: described large base plate and sealing piece are cast in together.
6. little decompression of confined water well locking device in the foundation ditch as claimed in claim 4, it is characterized in that: the thickness of described sealing piece is 4-12mm.
7. little decompression of confined water well device in the foundation ditch as claimed in claim 4 is characterized in that: described sealing piece race diameter φ 600-800mm.
8. such as little decompression of confined water well locking device in the described foundation ditch of arbitrary claim among the claim 3-7, it is characterized in that: the upper surface of the mouth of pipe of described well casing is lower than the upper surface of described large base plate, the mouth of pipe of described sealing steel plate sealing well casing is embedded in the described large base plate.
9. little decompression of confined water well locking device in the foundation ditch as claimed in claim 1, it is characterized in that: described Grouting Pipe is fixed on the mouth of pipe place of described well casing by reinforcing bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220316903 CN202809665U (en) | 2012-07-02 | 2012-07-02 | Blocking device for relief well of micro artesian water in foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220316903 CN202809665U (en) | 2012-07-02 | 2012-07-02 | Blocking device for relief well of micro artesian water in foundation pit |
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| CN202809665U true CN202809665U (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220316903 Expired - Lifetime CN202809665U (en) | 2012-07-02 | 2012-07-02 | Blocking device for relief well of micro artesian water in foundation pit |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334444A (en) * | 2013-07-09 | 2013-10-02 | 中国一冶集团有限公司 | Decompression type blocking method for foundation pit dewatering well |
| CN103343543A (en) * | 2013-07-09 | 2013-10-09 | 中国一冶集团有限公司 | Foundation pit dewatering well pressure-reduction-type plugging method |
| CN105970879A (en) * | 2016-05-16 | 2016-09-28 | 浙江广川工程咨询有限公司 | Method for quick recovery of vertical water stoppage of water gate |
| CN109869116A (en) * | 2019-03-07 | 2019-06-11 | 东北大学 | A kind of plugging dewatering well structure and its construction method |
| CN109881692A (en) * | 2019-03-22 | 2019-06-14 | 上海长凯岩土工程有限公司 | Pre-assembled dewatering well |
| CN110528546A (en) * | 2019-08-09 | 2019-12-03 | 天津建工城市建设发展有限公司 | Bottom plate plugging dewatering well construction method is worn in a kind of foundation pit |
| CN111058795A (en) * | 2019-12-27 | 2020-04-24 | 上海长凯岩土工程有限公司 | Recyclable bag type rapid well completion device and using method |
| CN113969596A (en) * | 2020-07-23 | 2022-01-25 | 万堡营造股份有限公司 | Water level balance pressure reduction construction method and structure for water leakage prevention of basement |
| CN114960715A (en) * | 2022-06-09 | 2022-08-30 | 浙江东南网架股份有限公司 | Underground engineering surge treatment device and control method |
-
2012
- 2012-07-02 CN CN 201220316903 patent/CN202809665U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334444A (en) * | 2013-07-09 | 2013-10-02 | 中国一冶集团有限公司 | Decompression type blocking method for foundation pit dewatering well |
| CN103343543A (en) * | 2013-07-09 | 2013-10-09 | 中国一冶集团有限公司 | Foundation pit dewatering well pressure-reduction-type plugging method |
| CN103334444B (en) * | 2013-07-09 | 2016-04-20 | 中国一冶集团有限公司 | A kind of method for blocking of foundation pit dewatering well pressure release type |
| CN105970879A (en) * | 2016-05-16 | 2016-09-28 | 浙江广川工程咨询有限公司 | Method for quick recovery of vertical water stoppage of water gate |
| CN109869116A (en) * | 2019-03-07 | 2019-06-11 | 东北大学 | A kind of plugging dewatering well structure and its construction method |
| CN109881692A (en) * | 2019-03-22 | 2019-06-14 | 上海长凯岩土工程有限公司 | Pre-assembled dewatering well |
| CN109881692B (en) * | 2019-03-22 | 2024-04-09 | 上海长凯岩土工程有限公司 | Preassembled dewatering well |
| CN110528546A (en) * | 2019-08-09 | 2019-12-03 | 天津建工城市建设发展有限公司 | Bottom plate plugging dewatering well construction method is worn in a kind of foundation pit |
| CN111058795A (en) * | 2019-12-27 | 2020-04-24 | 上海长凯岩土工程有限公司 | Recyclable bag type rapid well completion device and using method |
| CN113969596A (en) * | 2020-07-23 | 2022-01-25 | 万堡营造股份有限公司 | Water level balance pressure reduction construction method and structure for water leakage prevention of basement |
| CN114960715A (en) * | 2022-06-09 | 2022-08-30 | 浙江东南网架股份有限公司 | Underground engineering surge treatment device and control method |
| CN114960715B (en) * | 2022-06-09 | 2024-03-01 | 浙江东南网架股份有限公司 | Underground engineering surge treatment device and control method |
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Granted publication date: 20130320 |
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