CN112922001A - Efficient foundation pit dewatering structure - Google Patents
Efficient foundation pit dewatering structure Download PDFInfo
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- CN112922001A CN112922001A CN202110099323.0A CN202110099323A CN112922001A CN 112922001 A CN112922001 A CN 112922001A CN 202110099323 A CN202110099323 A CN 202110099323A CN 112922001 A CN112922001 A CN 112922001A
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- drainage well
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model relates to an efficient foundation pit dewatering structure, which comprises strainer pipes pre-buried around a foundation pit, an annular header pipe is arranged at the top end of the foundation pit, a bent connecting pipe is arranged between the strainer pipes and the header pipe, one end of the bent connecting pipe is communicated with the top ends of the strainer pipes, the other end of the bent connecting pipe is communicated with the header pipe, a pumping device is connected to the header pipe, first drainage wells are dug around the foundation pit, a second drainage well is dug at one side of the first drainage well close to the foundation pit, a communicating pipe is arranged between the first drainage well and the second drainage well, one end of the communicating pipe is communicated with the bottom of the first drainage well, the other end of the communicating pipe is communicated with the bottom of the second drainage well, a gate is inserted in the middle of the communicating pipe, a; a floating plate is arranged in the first drainage well, and an ejector rod used for jacking the steel rope is connected to the floating plate. The foundation pit settlement device has the advantages that the water level descending difference around the foundation pit is reduced, and the buildings around the foundation pit are uniformly settled.
Description
Technical Field
The application relates to the technical field of foundation ditch precipitation, especially, relate to an efficient foundation ditch precipitation structure.
Background
The foundation pit dewatering refers to dewatering work performed for ensuring that the foundation pit can be constructed under a dry condition and preventing slope instability, foundation quicksand, pit bottom uplift, pit bottom piping and foundation bearing capacity reduction when the underground water level is higher than the excavation bottom surface when the foundation pit is excavated. The foundation pit dewatering method mainly comprises the following steps: open ditch water collecting well precipitation, light well point precipitation, jet well point precipitation, electroosmosis well point precipitation, deep well point precipitation and the like.
Well point dewatering in foundation pit engineering is a method for artificially reducing underground water level, so the method is also called a well point dewatering method. Before the foundation pit is excavated, a certain number of water filter pipes are buried around the foundation pit, the top ends of the water filter pipes are communicated with an annular main pipe through bent connecting pipes, water is pumped by using a water pumping device, and pumped water is discharged into a drainage well, so that the soil of the excavated foundation pit is kept in a dry state all the time.
In view of the above-mentioned related art, the inventor believes that since the water level drop around each well point is in a funnel-shaped distribution, the water level drop around the entire foundation pit is inevitably in a curved distribution in the vicinity of the well point, and the curved distribution of the water level drop inevitably causes uneven settlement of neighboring buildings.
Disclosure of Invention
In order to reduce the water level decline difference around the foundation ditch for the building that the foundation ditch is around evenly subsides, this application provides an efficient foundation ditch precipitation structure.
The application provides a pair of efficient foundation ditch precipitation structure adopts following technical scheme:
an efficient foundation pit dewatering structure comprises strainer pipes pre-buried around a foundation pit, an annular header pipe is arranged at the top end of the foundation pit, a bent header pipe is arranged between the strainer pipes and the header pipe, one end of the bent header pipe is communicated with the top ends of the strainer pipes, the other end of the bent header pipe is communicated with the header pipe, a water pumping device is connected to the header pipe, first drainage wells are dug around the foundation pit, a second drainage well is dug on one side, close to the foundation pit, of each first drainage well, a communication pipe is arranged between the first drainage wells and the second drainage wells, one end of the communication pipe is communicated with the bottom of the first drainage well, the other end of the communication pipe is communicated with the bottom of the second drainage well, a gate is inserted in the middle of the communication pipe, a; a floating plate is arranged in the first drainage well, and an ejector rod used for jacking the steel rope is connected to the floating plate.
Through adopting above-mentioned technical scheme, when carrying out precipitation to the foundation ditch, start pumping device, take the water of foundation ditch below out to first drainage well in, when the water level in first drainage well risees gradually, the kickboard come-up in the first drainage well, until the steel cable jack-up of ejector pin with first drainage well top, make the steel cable upwards mention the gate, thereby make first drainage well and second drainage well can pass through communicating pipe intercommunication, and then make the backward flow in the first drainage well to in the second drainage well, effectual reduction foundation ditch is poor around the water level decline, the stability of ground water level has been guaranteed, the inhomogeneous settlement of the building around the foundation ditch has been avoided, the stability and the security of building have been improved.
Optionally, the pumping device comprises a water suction pump and a water suction pipe, the water suction pump is placed above the first drainage well, the header pipe is communicated with a water inlet of the water suction pump through a pipeline, one end of the water suction pipe is communicated with a water outlet of the water suction pump, and the other end of the water suction pipe extends into the first drainage well.
Through adopting above-mentioned technical scheme, start the suction pump for the water of strainer below the foundation ditch is taken out through house steward, and arrange to the first drainage well in by the drinking-water pipe with the suction pump delivery port intercommunication, thereby be convenient for quick accurate carry out the drainage to the foundation ditch, and then improved the precipitation efficiency of foundation ditch.
Optionally, be provided with spacing subassembly between kickboard and the first drainage well, spacing subassembly includes stopper and spacing groove, stopper fixed connection on the kickboard, and the spacing groove is seted up on the inner wall of first drainage well, and the stopper uses with the spacing groove cooperation.
Through adopting above-mentioned technical scheme, when the water level in the first drainage well risees gradually, the kickboard in the first drainage well is influenced by buoyancy and rises along with the water level for spacing inslot that stopper on the kickboard was seted up on the inner wall of first drainage well removes, thereby makes the kickboard can remain stable at the in-process that rises, and then the jack-up steel cable that the ejector pin on the kickboard of being convenient for can be accurate.
Optionally, the limiting block and the limiting groove are both of a T-shaped structure.
Through adopting above-mentioned technical scheme, set up stopper and spacing groove into T type structure for the kickboard is at the removal in-process, is difficult for taking place the skew of horizontal direction, thereby has further improved the stability that the kickboard removed, and the jack-up steel cable that the ejector pin on the kickboard of being convenient for can be accurate stable makes the water in the first drainage well flow back to in the second drainage well.
Optionally, the ejector rod is vertically arranged, the bottom end of the ejector rod is fixedly connected to the floating plate, an arc-shaped groove is formed in the top end of the ejector rod, and the cross section of the arc-shaped groove is larger than the diameter of the steel rope.
Through adopting the above technical scheme, the arc wall is seted up on the top of ejector pin, make in the arc wall is arranged in to the steel cable, thereby the area of contact of ejector pin and steel cable has been increased, the support effect of ejector pin to the steel cable has been improved, make the jack-up steel cable that the ejector pin can be accurate stable, thereby make the steel cable upwards mention the gate, make first drainage well and second drainage well can communicate through communicating pipe, and then make the backward flow in the first drainage well to in the second drainage well, effectual reduction foundation ditch is poor around the water level decline, underground water level's stability has been guaranteed, the inhomogeneous settlement of the building around the foundation ditch has been avoided, the stability and the security of building have been improved.
Optionally, a containing groove for containing the steel rope is formed in the bottom wall of the arc-shaped groove.
Through adopting above-mentioned technical scheme, offer the storage tank that is used for the holding steel cable on the diapire of arc wall for the steel cable that gets into in the arc wall can slide towards the diapire of arc wall along the arc of arc wall, thereby in making the storage tank of seting up on the steel cable embedding arc wall diapire, further improved the support effect of ejector pin to the steel cable.
Optionally, the top rod is connected with a plurality of balance rods, the balance rods are arranged in an inclined manner, the balance rods are symmetrically arranged relative to the top rod, one end of each balance rod is fixedly connected with the top rod, and the other end of each balance rod is fixedly connected with the floating plate.
Through adopting above-mentioned technical scheme, set up the balancing pole between ejector pin and kickboard, the joint strength of ejector pin and kickboard has been improved, make the ejector pin difficult emergence when the jack-up steel cable buckle, make the jack-up steel cable that the ejector pin can be accurate stable, thereby make the water in the first drainage well flow back to in the second drainage well, the water level decline difference around the effectual reduction foundation ditch, the stability of groundwater level has been guaranteed, the non-uniform settlement of the building around the foundation ditch has been avoided, the stability and the security of building have been improved.
Optionally, an auxiliary lifting assembly is arranged between the gate and the steel rope, the auxiliary lifting assembly comprises a fixed pulley and a movable pulley, the fixed pulley is fixedly connected right above the gate, the movable pulley is fixedly connected with the gate through a rope, and a free end of the steel rope sequentially bypasses the movable pulley and the fixed pulley and is fixedly connected to the movable pulley.
Through adopting above-mentioned technical scheme, use through the cooperation of fixed pulley and movable pulley, saved the pulling force of steel cable to the roof jack-up steel cable of being convenient for drives the gate and rises, makes the water in the first drainage well flow back to in the second drainage well, and the effectual water level that reduces around the foundation ditch descends poorly, has guaranteed ground water level's stability, has avoided the uneven settlement of the building around the foundation ditch, has improved the stability and the security of building.
Optionally, a third drainage well is dug on one side, close to the foundation pit, of the second drainage well, and the second drainage well is communicated with the third drainage well through a pipeline.
Through adopting above-mentioned technical scheme, one side that the second drainage well is close to the foundation ditch is dug and is established the third drainage well with second drainage well intercommunication, further makes foundation ditch below discharged water to the position backward flow that is close to the foundation ditch to effectual reduction water level decline difference around the foundation ditch has guaranteed ground water level's stability, has avoided the differential settlement of the building around the foundation ditch, has improved the stability and the security of building.
Optionally, one end of the water pumping pipe extending into the first drainage well is fixedly connected to the inner wall of the first drainage well.
Through adopting above-mentioned technical scheme, with drinking-water pipe fixed connection on the inner wall of first drainage well, avoided the drinking-water pipe to rise along with the surface of water and float to prevent that the drinking-water pipe from influencing the come-up of kickboard, and then improved the stability of kickboard and ejector pin come-up.
To sum up, this application includes following at least one efficient foundation ditch precipitation structure beneficial technological effect:
first drainage well, second drainage well and pumping assembly's cooperation is used, when carrying out precipitation to the foundation ditch, start pumping device, take the water of foundation ditch below out to first drainage well in, when the water level in first drainage well risees gradually, the kickboard come-up in the first drainage well, until the steel cable jack-up of ejector pin with first drainage well top, make the steel cable upwards mention the gate, thereby make first drainage well and second drainage well can communicate through communicating pipe, and then make the backward flow in the first drainage well to in the second drainage well, effectual reduction water level is poor down around the foundation ditch, the stability of groundwater level has been guaranteed, the uneven settlement of the building around the foundation ditch has been avoided, the stability and the security of building have been improved.
Drawings
FIG. 1 is a schematic structural diagram of the present application;
FIG. 2 is a partial structural schematic of the present application;
FIG. 3 is an enlarged partial schematic view of FIG. 2 at A;
FIG. 4 is a schematic sectional view for showing the auxiliary pulling apparatus.
Description of reference numerals: 1. a foundation pit; 2. a water filter pipe; 3. a header pipe; 4. bending the connecting pipe; 5. a water pumping device; 51. a water pump; 52. a water pumping pipe; 6. a first drainage well; 7. a second drainage well; 8. a communicating pipe; 9. a gate; 10. a steel cord; 11. a floating plate; 12. a top rod; 121. an arc-shaped slot; 1211. a containing groove; 122. a balancing pole; 13. a limiting component; 131. a limiting block; 132. a limiting groove; 14. an auxiliary pulling device; 141. a fixed pulley; 142. a movable pulley; 15. and a third drainage well.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
Referring to fig. 1 and 2, the embodiment of the application discloses an efficient foundation pit dewatering structure, including pre-buried a plurality of strainer 2 around foundation pit 1, the top intercommunication of a plurality of strainer 2 has house steward 3, is connected with pumping device 5 on house steward 3. A first drainage well 6, a second drainage well 7 and a third drainage well 15 are sequentially dug from outside to inside around the foundation pit 1, and a pumping device 5 is arranged between the main pipe 3 and the first drainage well 6. With reference to fig. 3 and 4, a communicating pipe 8 is arranged between the first drainage well 6 and the second drainage well 7, a gate 9 is inserted in the middle of the communicating pipe 8, a steel rope 10 is connected to the gate 9, and the other end of the steel rope 10 is fixedly connected to the ground; a floating plate 11 is arranged in the first drainage well 6, and a mandril 12 for jacking the steel rope 10 is connected to the floating plate 11. The second drainage well 7 is in communication with the third drainage well 15 by means of a pipe.
During the use, start pumping device 5, take out the water below foundation ditch 1 to first drainage well 6 in, when the water level in first drainage well 6 risees gradually, the kickboard 11 in the first drainage well 6 floats on, jack-up until ejector pin 12 with the steel cable 10 jack-up of first drainage well 6 top, make steel cable 10 upwards mention gate 9, thereby make first drainage well 6 and second drainage well 7 can be through communicating pipe 8 intercommunication, and then make in the first drainage well 6 flow back to in the second drainage well 7, simultaneously in the second drainage well 7 some water also can flow back to third drainage well 15 again through the pipeline, reduce the water level decline difference around foundation ditch 1.
Referring to fig. 2, strainer 2 is vertical to be provided with a plurality ofly, and a plurality of strainers 2 are in foundation ditch 1 evenly distributed all around, and house steward 3 is the square ring structure that the level set up, and house steward 3 fixed connection is provided with bent antithetical couplet pipe 4 between house steward 3 and strainer 2 and house steward 3 on the periphery on foundation ditch 1 top, and bent antithetical couplet pipe 4 one end communicates with strainer 2's top, and bent antithetical couplet pipe 4's the other end communicates with house steward 3.
Referring to fig. 1 and 4, four first drainage wells 6 are provided, and the four first drainage wells 6 are respectively distributed around the foundation pit 1. The number of the second drainage wells 7 and the number of the third drainage wells 15 are four, and the four second drainage wells 7 and the four third drainage wells 15 are uniformly distributed around the foundation pit 1. The communicating pipe 8 is of a U-shaped structure, one end of the communicating pipe 8 is communicated with the bottom of the first drainage well 6, and the other end of the communicating pipe 8 is communicated with the bottom of the second drainage well 7.
Referring to fig. 2, the pumping device 5 includes four pumping pumps 51 and four pumping pipes 52, the four pumping pumps 51 are respectively placed around the top end of the foundation pit 1, four sides of the ring main pipe 3 are respectively communicated with a water inlet of the water pump through a pipeline, the four pumping pipes 52 are provided, one ends of the four pumping pipes 52 are respectively communicated with water outlets of the four pumping pumps 51, and the other ends of the four pumping pipes 52 respectively extend into the four first drainage wells 6 and are fixedly connected to inner walls of the first drainage wells 6.
During the use, start four suction pumps 51 simultaneously for many strainer 2 take the water of foundation ditch 1 below out through house steward 3, and arrange to in the first drainage well 6 by the drinking-water pipe 52 with the delivery port intercommunication of suction pump 51.
Referring to fig. 3, the floating plate 11 is a horizontally arranged rectangular plate, the cross-sectional dimension of the floating plate 11 is smaller than that of the first drainage well 6, the ejector rod 12 is vertically arranged, the bottom end of the ejector rod 12 is fixedly connected to the center of the top surface of the floating plate 11, the top end of the ejector rod 12 is provided with an arc-shaped groove 121, the bottom wall of the arc-shaped groove 121 is provided with a containing groove 1211, and the longitudinal projection of the steel rope 10 falls in the containing groove 1211. A plurality of balance rods 122 are arranged between the top rod 12 and the floating plate 11, the balance rods 122 are arranged in an inclined manner, the balance rods 122 are symmetrically arranged relative to the top rod 12, the top end of each balance rod 122 is fixedly connected with the outer wall of the top rod 12, and the bottom end of each balance rod 122 is fixedly connected with the top surface of the floating plate 11.
When the water level in the first drainage well 6 rises gradually, the floating plate 11 in the first drainage well 6 rises along with the water level under the influence of buoyancy, so that the ejector rod 12 continuously approaches to the steel rope 10 until the steel rope 10 falls into the accommodating groove 1211 in the arc-shaped groove 121 at the top end of the ejector rod 12, and the steel rope 10 is stably jacked up by the ejector rod 12.
Referring to fig. 3, be provided with spacing subassembly 13 between kickboard 11 and the first drainage well 6, spacing subassembly 13 includes stopper 131 and spacing groove 132, stopper 131 is T type piece, stopper 131 is provided with two, two stopper 131 are located 11 length direction's of kickboard both sides respectively, stopper 131 and 11 fixed connection of kickboard, spacing groove 132 is provided with two, two spacing grooves 132 are seted up respectively on the inner wall of 6 both sides of first drainage well, the vertical setting of spacing groove 132, the transversal T type of personally submitting of spacing groove 132, stopper 131 uses with spacing groove 132 cooperation.
When the floating plate is used, the floating plate 11 rises along with the water level under the influence of buoyancy, and drives the limit block 131 on the floating plate 11 to move in the limit groove 132 formed on the inner wall of the first drainage well 6, so that the floating plate 11 can be kept stable in the rising process.
Referring to fig. 4, an auxiliary pulling assembly is disposed between gate 9 and cable 10, the auxiliary pulling assembly includes a fixed pulley 141 and a movable pulley 142, the fixed pulley 141 is disposed directly above gate 9, the movable pulley 142 is fixedly connected to gate 9 via a cable, the axial direction of the fixed pulley 141 is the same as the axial direction of the movable pulley 142, and a free end of cable 10 sequentially passes around the movable pulley 142 and fixed pulley 141 and is fixedly connected to the movable pulley 142.
When the water drainage device is used, the ejector rod 12 jacks up the rope, so that the steel cable drives the movable pulley 142 and the gate 9 to move upwards together, and the first water drainage well 6 and the second water drainage well 7 can be communicated through the communicating pipe 8.
The implementation principle of an efficient foundation ditch precipitation structure of the embodiment of this application is: the water pumping device 5 is started, water below the foundation pit 1 is pumped into the first drainage well 6, when the water level in the first drainage well 6 gradually rises, the floating plate 11 in the first drainage well 6 floats upwards until the steel rope 10 above the first drainage well 6 is jacked up by the jacking rod 12, the steel rope 10 lifts the gate 9 upwards, the first drainage well 6 and the second drainage well 7 can be communicated through the communicating pipe 8, the water in the first drainage well 6 flows back into the second drainage well 7, meanwhile, part of water in the second drainage well 7 can flow back into the third drainage well 15 through the pipeline, the water level descending difference around the foundation pit 1 is effectively reduced, the stability of the underground water level is guaranteed, the uneven settlement of buildings around the foundation pit 1 is avoided, and the stability and the safety of the buildings are improved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides an efficient foundation ditch precipitation structure, includes pre-buried at foundation ditch (1) strainer (2) all around, the top of foundation ditch (1) is provided with annular house steward (3), is provided with curved antithetical couplet pipe (4) between strainer (2) and house steward (3), the top intercommunication of curved antithetical couplet pipe (4) one end and strainer (2), the other end and house steward (3) intercommunication of curved antithetical couplet pipe (4), be connected with pumping device (5) on house steward (3), its characterized in that: a first drainage well (6) is dug around the foundation pit (1), a second drainage well (7) is dug at one side, close to the foundation pit (1), of the first drainage well (6), a communicating pipe (8) is arranged between the first drainage well (6) and the second drainage well (7), one end of the communicating pipe (8) is communicated with the bottom of the first drainage well (6), the other end of the communicating pipe (8) is communicated with the bottom of the second drainage well (7), a gate (9) is inserted in the middle of the communicating pipe (8), a steel rope (10) is connected to the gate (9), and the other end of the steel rope (10) is fixedly connected to the ground; a floating plate (11) is arranged in the first drainage well (6), and a mandril (12) for jacking the steel rope (10) is connected on the floating plate (11).
2. An efficient excavation dewatering structure as claimed in claim 1, wherein: water pumping device (5) include suction pump (51) and drinking-water pipe (52), and suction pump (51) are placed in first drainage well (6) top, and house steward (3) pass through the pipeline intercommunication with the water inlet of suction pump (51), and the one end of drinking-water pipe (52) communicates with the delivery port of suction pump (51), and the other end of drinking-water pipe (52) stretches into in first drainage well (6).
3. An efficient excavation dewatering structure as claimed in claim 2, wherein: be provided with spacing subassembly (13) between kickboard (11) and first drainage well (6), spacing subassembly (13) include stopper (131) and spacing groove (132), stopper (131) fixed connection on kickboard (11), and spacing groove (132) are seted up on the inner wall of first drainage well (6), and stopper (131) and spacing groove (132) cooperation are used.
4. An efficient excavation dewatering structure as claimed in claim 2, wherein: the limiting block (131) and the limiting groove (132) are both of T-shaped structures.
5. An efficient excavation dewatering structure as claimed in claim 1, wherein: the steel rope lifting device is characterized in that the ejector rod (12) is vertically arranged, the bottom end of the ejector rod (12) is fixedly connected to the floating plate (11), the top end of the ejector rod (12) is provided with an arc-shaped groove (121), and the cross section of the arc-shaped groove (121) is larger than the diameter of the steel rope (10).
6. An efficient excavation dewatering structure as claimed in claim 1, wherein: the bottom wall of the arc-shaped groove (121) is provided with a containing groove (1211) for containing the steel rope (10).
7. An efficient excavation dewatering structure as claimed in claim 1, wherein: the balance rod assembly is characterized in that the top rod (12) is connected with a plurality of balance rods (122), the balance rods (122) are obliquely arranged, the balance rods (122) are symmetrically arranged relative to the top rod (12), one end of each balance rod (122) is fixedly connected with the top rod (12), and the other end of each balance rod (122) is fixedly connected with the floating plate (11).
8. A high efficiency foundation pit dewatering structure as claimed in claim 3, wherein: an auxiliary lifting component is arranged between the gate (9) and the steel rope (10), the auxiliary lifting component comprises a fixed pulley (141) and a movable pulley (142), the fixed pulley (141) is fixedly connected right above the gate (9), the movable pulley (142) is fixedly connected with the gate (9) through a rope, and one free end of the steel rope (10) sequentially bypasses the movable pulley (142) and the fixed pulley (141) and is fixedly connected to the movable pulley (142).
9. An efficient excavation dewatering structure as claimed in claim 2, wherein: one side of the second drainage well (7) close to the foundation pit (1) is dug to be provided with a third drainage well (15), and the second drainage well (7) is communicated with the third drainage well (15) through a pipeline.
10. An efficient excavation dewatering structure as claimed in claim 2, wherein: one end of the water pumping pipe (52) extending into the first drainage well (6) is fixedly connected to the inner wall of the first drainage well (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110099323.0A CN112922001B (en) | 2021-01-25 | 2021-01-25 | Foundation pit dewatering structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110099323.0A CN112922001B (en) | 2021-01-25 | 2021-01-25 | Foundation pit dewatering structure |
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| Publication Number | Publication Date |
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| CN112922001A true CN112922001A (en) | 2021-06-08 |
| CN112922001B CN112922001B (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110099323.0A Active CN112922001B (en) | 2021-01-25 | 2021-01-25 | Foundation pit dewatering structure |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030178687A1 (en) * | 2002-03-19 | 2003-09-25 | Tung-Cheng Kuo | Mask read-only memory and fabrication thereof |
| CN209179037U (en) * | 2018-11-26 | 2019-07-30 | 中铁二十局集团市政工程有限公司 | Red Sandstone compound stratum base pit dewatering constructing structure under upper cobble |
| CN111549807A (en) * | 2020-04-26 | 2020-08-18 | 孙建立 | Water lowering and draining method combining water conservancy project foundation pit and pipe well with light well point |
| CN211621640U (en) * | 2019-12-14 | 2020-10-02 | 天津二建建筑工程有限公司 | Well water circulating system of foundation pit dewatering well |
| CN211900694U (en) * | 2019-09-09 | 2020-11-10 | 南京康泰建筑灌浆科技有限公司 | Drainage system that existing tunnel road surface blockked up |
-
2021
- 2021-01-25 CN CN202110099323.0A patent/CN112922001B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030178687A1 (en) * | 2002-03-19 | 2003-09-25 | Tung-Cheng Kuo | Mask read-only memory and fabrication thereof |
| CN209179037U (en) * | 2018-11-26 | 2019-07-30 | 中铁二十局集团市政工程有限公司 | Red Sandstone compound stratum base pit dewatering constructing structure under upper cobble |
| CN211900694U (en) * | 2019-09-09 | 2020-11-10 | 南京康泰建筑灌浆科技有限公司 | Drainage system that existing tunnel road surface blockked up |
| CN211621640U (en) * | 2019-12-14 | 2020-10-02 | 天津二建建筑工程有限公司 | Well water circulating system of foundation pit dewatering well |
| CN111549807A (en) * | 2020-04-26 | 2020-08-18 | 孙建立 | Water lowering and draining method combining water conservancy project foundation pit and pipe well with light well point |
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| Publication number | Publication date |
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| CN112922001B (en) | 2021-11-02 |
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