CN110241835B - Drainage construction structure of foundation pit blind ditch and construction method thereof - Google Patents
Drainage construction structure of foundation pit blind ditch and construction method thereof Download PDFInfo
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- CN110241835B CN110241835B CN201910394106.7A CN201910394106A CN110241835B CN 110241835 B CN110241835 B CN 110241835B CN 201910394106 A CN201910394106 A CN 201910394106A CN 110241835 B CN110241835 B CN 110241835B
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- 238000010276 construction Methods 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 133
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 74
- 239000010959 steel Substances 0.000 claims abstract description 74
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000004744 fabric Substances 0.000 claims description 33
- 238000001914 filtration Methods 0.000 claims description 9
- 239000011148 porous material Substances 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000004568 cement Substances 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000003673 groundwater Substances 0.000 description 3
- 230000009545 invasion Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a drainage construction structure of a foundation pit blind ditch, which comprises a foundation pit bottom, wherein a blind ditch is formed at the position, close to a side slope, of the foundation pit bottom, a layer of dense safety net is paved on the inner wall of the blind ditch, cobbles are filled and constructed above the dense safety net in the blind ditch, a water collecting well is formed on the foundation pit bottom, and a steel filter cartridge is inserted in the water collecting well; the invention also discloses a construction method for draining the blind ditch of the foundation pit, which comprises the following steps: excavating blind ditches, paving a dense safety net, filling cobbles, excavating a water collecting well and pouring bottom plate concrete; the invention can realize drainage of the bottom of the concrete cushion, the water collecting well adopts a plastic bucket bottom-covering water squeezing method to realize concrete backfill and blocking, ensures the water-cement ratio of the backfill concrete, also prevents the embarrassing situation of burying the submersible pump into the well, and simultaneously utilizes the principle of high concrete density to squeeze out the water of the bottom of the water collecting well, so that the water collecting well is blocked more tightly, and the problem of water leakage of the basement bottom plate at the water collecting well part is solved.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a drainage construction structure of a blind ditch of a foundation pit and a construction method thereof.
Background
When the building foundation pit is dug to the designed bottom elevation, if the ground water is untreated, the ground water in the foundation pit is often changed into mud, even when the bottom plate concrete is poured, the pit bottom is still in a ponding phenomenon, the engineering quality is influenced, the construction progress is influenced, the reason for the phenomenon is mainly that according to the conventional construction, open trenches are only dug in the foundation pit, but the drain trenches occupy the construction surface, for the follow-up construction, the open trenches are buried when the cushion layer is poured, the ground water head at the bottom of the cushion layer rises, the water seeps out from the bottom of the cushion layer, the waterproof layer is broken, the water is always stored in the foundation pit, even if the bottom layer is pumped, the bottom layer is difficult to pump, the water-cement ratio of the poured concrete is increased, and the strength and the impermeability of the concrete are reduced.
Disclosure of Invention
The invention aims to provide a drainage construction structure of a blind ditch of a foundation pit and a construction method thereof, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the foundation pit blind ditch drainage construction comprises a foundation pit bottom 1, a blind ditch 2 is formed in the position, close to a side slope 101, of the foundation pit bottom 1, a layer of dense safety net 4 is paved on the inner wall of the blind ditch 2, cobblestones 5 are filled above the dense safety net 4 in the blind ditch 2, one layer of color bar cloth 9 is paved on the cobblestones 5, a steel sheet net 10 is pressed above the color bar cloth 9, a concrete cushion layer 8 is poured above the steel sheet net 10, a waterproof layer 11 is arranged above the concrete cushion layer 8, a waterproof layer 12 is arranged above the waterproof layer 11, a water collecting well 3 is formed in the foundation pit bottom 1, a dense safety net 4 is paved on the wall of the water collecting well 3, a steel filter cartridge 6 is inserted in the water collecting well 3, cobblestones 5 are backfilled between the wall of the water collecting well 3 and the steel filter cartridge 6, a submersible pump 13 is arranged at the inner bottom of the steel filter cartridge 6, a water pipe 7 is connected to the submersible pump 13, a water filter cartridge 7 is arranged at the upper end of the water filter cartridge 7, a water ring 16 is arranged at the water ring 16 and extends to the outer side of the water ring 8, and a water ring 16 is arranged at the water ring 16 and extends above the water ring 16.
Preferably, the depth of the water collecting well 3 is 500mm, the diameter is 1200mm, the diameter of the steel filter cartridge 6 is 500mm, the thickness is 2mm, and the pore diameters of the filtering pores 14 on the steel filter cartridge 6 are 5mm.
Preferably, after the submersible pump 13 is taken out from the water collecting well 3, a plastic bucket 17 is placed in the water collecting well 3, a bucket opening of the plastic bucket 17 faces upwards, the length of the plastic bucket 17 is 150mm, and the radius of the plastic bucket 17 is 1mm smaller than that of the steel filter cylinder 6.
Preferably, the width of the lower water stop ring 15 is 50mm, the width of the upper water stop ring 16 is 100mm, the upper water stop ring 16 is 150mm higher than the surface of the concrete cushion layer 8, and the nozzle of the steel filter cartridge 6 is 100mm higher than the upper water stop ring 16.
The foundation pit blind ditch drainage construction method comprises the following steps:
s1: digging blind ditches: when the foundation pit is excavated to the designed bottom elevation, manually excavating blind ditches with the width of 300mm and the depth of 300mm according to the water outlet condition of the foundation pit, putting slopes of 5 per mill, and making the bottom into an arc shape, so that the paving of a dense safety net and the filling of cobbles are facilitated;
s2: paving a dense mesh safety net: a layer of dense safety net is paved along the inner wall of the blind ditch, the reverse slope of the dense safety net is 500mm wide, the bottom of the upper reverse foundation pit is 200mm wide, steel nails are adopted for nailing firmly, and the width of the dense safety net is not less than 200mm when the dense safety net is lapped;
S3: filling cobbles: filling cobbles in the blind ditches, and leveling the bottom of the foundation pit on the upper surface;
s4: paving color stripe cloth: a layer of color stripe cloth is paved on the cobble of the blind ditch, the color stripe cloth is 1000mm wide against the slope, so that the slope seepage water can be easily led into the blind ditch along the color stripe cloth, the width of the reverse foundation pit bottom is 300mm wide, steel nails are adopted for nailing firmly, and the width of the color stripe cloth is not less than 300mm when the color stripe cloth is lapped;
s5: laying a steel plate net: laying a steel plate net on the side slope according to the side slope support design, and pressing the dense mesh safety net and the color stripe cloth by using the steel plate net to prevent the dense mesh safety net and the color stripe cloth from falling off;
S6: excavating a water collecting well: determining the arrangement position of the water collecting well according to the main water spot position of the foundation pit bottom, the arrangement condition of the building vertical structure and the distance of the blind ditches converging into the water collecting well, and adopting a rotary excavator to excavate the water collecting well with the excavation depth of 5m and the diameter of 1200 mm;
S7: insert steel cartridge: after the water collecting well is dug, a steel filter cylinder is inserted in the middle of the water collecting well, cobbles are backfilled around the steel filter cylinder, and then a submersible pump is immersed in the steel filter cylinder to pump water;
S8: pouring bottom plate concrete: pouring bottom plate concrete (concrete cushion) at the side slope and foundation pit bottom, pumping water in the water collecting well as much as possible when the bottom plate concrete is poured near the water collecting well, providing a submerged pump, then plugging a plastic bucket into a steel filter cylinder, pouring the water collecting well by adopting micro-expansion concrete with the same strength level as the bottom plate, pushing the plastic bucket to extrude downwards by the micro-expansion concrete in the pouring process, extruding water at the bottom of the steel filter cylinder through a filtering hole, expanding the plastic bucket, tightly combining with the steel filter cylinder, pouring together with the bottom plate concrete after the micro-expansion concrete overflows, and leaving a lower water stop ring in the middle of the concrete cushion and an upper water stop ring above the concrete cushion.
Preferably, the particle size of cobbles in the step S3 is not more than 50mm, the cobbles need to be cleaned before filling, the mud content is not more than 5%, and the sand content is not more than 4%.
Compared with the prior art, the invention has the beneficial effects that: the invention has reasonable structural design and flexible construction, is not easy to bend like a finished blind ditch, and by adopting the structure and the method, the blind ditch can be arranged at will according to underground water-falling points, the bottom of the blind ditch uses a dense safety net as a reverse water filtering net, cobbles are filled in the ditch for drainage, and the surface is paved with color stripe cloth to prevent the invasion of cushion layer concrete so as to realize the drainage of the bottom of a concrete cushion layer; the water collecting well adopts a plastic bucket bottom-covering water squeezing method to carry out concrete backfill and plug, so that the water-cement ratio of the backfill concrete is ensured, the embarrassing situation that the submersible pump is buried in the well is also prevented, meanwhile, the water collecting well bottom water is squeezed out by utilizing the principle of high concrete density, the water collecting well is plugged more tightly, and the problem that the basement bottom plate leaks at the water collecting well part is solved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged schematic view of the structure A in FIG. 1 according to the present invention;
FIG. 3 is an enlarged schematic view of the structure of FIG. 1B according to the present invention;
FIG. 4 is an enlarged schematic view of the structure of FIG. 1 at C in accordance with the present invention;
FIG. 5 is a schematic view of a blind drain according to the present invention;
fig. 6 is a schematic view of a steel cartridge of the present invention.
In the figure: the foundation pit comprises a foundation pit bottom 1, a side slope 101, blind ditches 2, a water collecting well 3, a dense safety net 4, cobbles 5, a steel filter cylinder 6, a water pumping pipe 7, a concrete cushion layer 8, color stripe cloth 9, a steel plate net 10, a waterproof layer 11, a waterproof protection layer 12, a submersible pump 13, a filtering hole 14, a lower water stop ring 15, an upper water stop ring 16 and a plastic bucket 17.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-6, the present invention provides the following technical solutions: the drainage construction structure of the blind ditch of the foundation pit comprises a foundation pit bottom 1, a blind ditch 2 is arranged at the position, close to a side slope 101, of the foundation pit bottom 1, a layer of dense safety net 4 is paved on the inner wall of the blind ditch 2, cobbles 5 are filled above the dense safety net 4 in the blind ditch 2, a layer of color stripe cloth 9 is paved on the cobbles 5, steel sheet nets 10 are pressed above the color stripe cloth 9, a concrete cushion layer 8 is poured above the steel sheet nets 10, a waterproof layer 11 is arranged above the concrete cushion layer 8, a waterproof layer 12 is arranged above the waterproof layer 11, a water collecting well 3 is arranged on the foundation pit bottom 1, a dense safety net 4 is paved on the wall of the water collecting well 3, a steel filter cartridge 6 is inserted in the water collecting well 3, the depth of the water collecting well 3 is 500mm, the diameter of the steel filter cartridge 6 is 500mm, the thickness of the filter holes 14 on the steel filter cartridge 6 are 5mm, cobbles 5 are backfilled between the water collecting well 3 and the steel filter cartridge 6, the bottom of the inner side of the steel filter cylinder 6 is provided with a submersible pump 13, the submersible pump 13 is connected with a water suction pipe 7, the upper end of the water suction pipe 7 extends to the outside of the steel filter cylinder 6, when the submersible pump 13 is taken out of the water collecting well 3, a plastic barrel 17 is arranged in the water collecting well 3, the barrel mouth of the plastic barrel 17 faces upwards, the length of the plastic barrel 17 is 150mm, the radius of the plastic barrel 17 is smaller than that of the steel filter cylinder 6 by 1mm, the lower end of the outer side of the steel filter cylinder 6 is provided with a filtering hole 14, the upper end of the steel filter cylinder 6 is provided with a lower water stop ring 15 and an upper water stop ring 16, the upper end of the steel filter cylinder 6 extends above the concrete cushion 8, the lower water stop ring 15 is positioned in the middle of the concrete cushion 8, the upper water stop ring 16 is positioned above the concrete cushion 8, the width of the lower water stop ring 15 is 50mm, the width of the upper water stop ring 16 is 100mm, the upper water stop ring 16 is 150mm higher than the concrete cushion 8, the mouth of the steel filter cartridge 6 is 100mm higher than the upper water stop ring 16.
The drainage construction method for the blind ditch of the foundation pit comprises the following steps:
s1: digging blind ditches: when the foundation pit is excavated to the designed bottom elevation, manually excavating blind ditches with the width of 300mm and the depth of 300mm according to the water outlet condition of the foundation pit, putting slopes of 5 per mill, and making the bottom into an arc shape, so that the paving of a dense safety net and the filling of cobbles are facilitated;
s2: paving a dense mesh safety net: a layer of dense safety net is paved along the inner wall of the blind ditch, the reverse slope of the dense safety net is 500mm wide, the bottom of the upper reverse foundation pit is 200mm wide, steel nails are adopted for nailing firmly, and the width of the dense safety net is not less than 200mm when the dense safety net is lapped;
S3: filling cobbles: filling cobbles in the blind ditches, wherein the upper surface of the cobbles is flat at the bottom of the foundation pit, the particle size of the cobbles is not more than 50mm, the cobbles need to be cleaned before filling, the mud content is not more than 5%, and the sand content is not more than 4%;
s4: paving color stripe cloth: a layer of color stripe cloth is paved on the cobble of the blind ditch, the color stripe cloth is 1000mm wide against the slope, so that the water seepage of the side slope is facilitated to be converged into the blind ditch along the color stripe cloth, the bottom of the reverse foundation pit is 300mm wide, steel nails are adopted for nailing firmly, and the width of the color stripe cloth is not less than 300mm when the color stripe cloth is overlapped;
s5: laying a steel plate net: laying a steel plate net on the side slope according to the side slope support design, and pressing the dense mesh safety net and the color stripe cloth by using the steel plate net to prevent the dense mesh safety net and the color stripe cloth from falling off;
S6: excavating a water collecting well: determining the arrangement position of the water collecting well according to the main water spot position of the foundation pit bottom, the arrangement condition of the building vertical structure and the distance of collecting the blind ditches into the water collecting well, adopting a rotary excavator to excavate the water collecting well with the excavation depth of 5m and the diameter of 1200mm (the position of the water collecting well in figure 5 is used as a reference);
S7: insert steel cartridge: after the water collecting well is dug, a steel filter cylinder is inserted in the middle of the water collecting well, cobbles are backfilled around the steel filter cylinder, and then a submersible pump is immersed in the steel filter cylinder to pump water;
S8: pouring bottom plate concrete: pouring bottom plate concrete (concrete cushion) at the side slope and foundation pit bottom, pumping water in the water collecting well as much as possible when the bottom plate concrete is poured near the water collecting well, providing a submerged pump, then plugging a plastic bucket into a steel filter cylinder, pouring the water collecting well by adopting micro-expansion concrete with the same strength level as the bottom plate, pushing the plastic bucket to extrude downwards by the micro-expansion concrete in the pouring process, extruding water at the bottom of the steel filter cylinder through a filtering hole, expanding the plastic bucket, tightly combining with the steel filter cylinder, pouring together with the bottom plate concrete after the micro-expansion concrete overflows, and leaving a lower water stop ring in the middle of the concrete cushion and an upper water stop ring above the concrete cushion.
The invention has reasonable structural design and flexible construction, is not easy to bend like a finished blind ditch, and by adopting the structure and the method, the blind ditch can be arranged at will according to underground water-falling points, the bottom of the blind ditch uses a dense safety net as a reverse water filtering net, cobbles are filled in the ditch for drainage, and the surface is paved with color stripe cloth to prevent the invasion of cushion layer concrete so as to realize the drainage of the bottom of a concrete cushion layer; the water collecting well adopts a plastic bucket bottom-covering water squeezing method to carry out concrete backfill and plug, so that the water-cement ratio of the backfill concrete is ensured, the embarrassing situation that the submersible pump is buried in the well is also prevented, meanwhile, the water collecting well bottom water is squeezed out by utilizing the principle of high concrete density, the water collecting well is plugged more tightly, and the problem that the basement bottom plate leaks at the water collecting well part is solved.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a foundation ditch blind ditch drainage construction structure, includes foundation ditch bottom (1), its characterized in that: the utility model discloses a water pump, including foundation ditch (1) and filter cartridge (6), the foundation ditch is located at the bottom (1) of foundation ditch, is close to side slope (101) department and has seted up french drain (2), the inner wall of french drain (2) is laid and is pasted one deck secret mesh safety net (4), cobblestone (5) have been filled in the top that is located secret mesh safety net (4) in french drain (2), cobblestone (5) upper berth is laid one deck color stripe cloth (9), steel sheet net (10) have been pressed to the top of color stripe cloth (9), concrete pad layer (8) have been pour to the top of steel sheet net (10), the top of concrete pad layer (8) is provided with waterproof layer (11), the top of waterproof layer (11) is provided with waterproof layer (12), set up collecting well (3) on foundation ditch bottom (1), the wall of collecting well (3) is pasted secret mesh safety net (4), insert in collecting well (3) and be provided with steel filter cartridge (6), between the wall of collecting well (3) and steel filter cartridge (6), steel cartridge (6) are filled with, water pump (7) are placed outside (13) are connected to the outside of filter tube (13), the upper end of the outer side of the steel filter cylinder (6) is provided with a lower water stop ring (15) and an upper water stop ring (16), the upper end of the steel filter cylinder (6) extends to the position above the concrete cushion layer (8), the lower water stop ring (15) is positioned in the middle of the concrete cushion layer (8), and the upper water stop ring (16) is positioned above the concrete cushion layer (8); after the submersible pump (13) is taken out of the water collecting well (3), a plastic barrel (17) is arranged in the water collecting well (3), a barrel opening of the plastic barrel (17) faces upwards, the length of the plastic barrel (17) is 150mm, and the radius of the plastic barrel (17) is 1mm smaller than that of the steel filter cylinder (6); the width of the lower water stop ring (15) is 50mm, the width of the upper water stop ring (16) is 100mm, the upper water stop ring (16) is 150mm higher than the surface of the concrete cushion layer (8), and the nozzle of the steel filter cylinder (6) is 100mm higher than the upper water stop ring (16).
2. The foundation pit blind drain construction structure according to claim 1, wherein: the depth of the water collecting well (3) is 5000mm, the diameter of the water collecting well is 1200mm, the diameter of the steel filter cylinder (6) is 500mm, the thickness of the steel filter cylinder is 2mm, and the pore diameters of the filtering pores (14) on the steel filter cylinder (6) are all 5mm.
3. The construction method of the drainage construction structure of the blind ditch of the foundation pit according to any one of claims 1 to 2, comprising the steps of:
s1: digging blind ditches: when the foundation pit is excavated to the designed bottom elevation, manually excavating blind ditches with the width of 300mm and the depth of 300mm according to the water outlet condition of the foundation pit, putting slopes of 5 per mill, and making the bottom into an arc shape, so that the paving of a dense safety net and the filling of cobbles are facilitated;
s2: paving a dense mesh safety net: a layer of dense safety net is paved along the inner wall of the blind ditch, the reverse slope of the dense safety net is 500mm wide, the bottom of the upper reverse foundation pit is 200mm wide, steel nails are adopted for nailing firmly, and the width of the dense safety net is not less than 200mm when the dense safety net is lapped;
S3: filling cobbles: filling cobbles in the blind ditches, and leveling the bottom of the foundation pit on the upper surface;
s4: paving color stripe cloth: a layer of color stripe cloth is paved on the cobble of the blind ditch, the color stripe cloth is 1000mm wide against the slope, so that the slope seepage water can be easily led into the blind ditch along the color stripe cloth, the width of the reverse foundation pit bottom is 300mm wide, steel nails are adopted for nailing firmly, and the width of the color stripe cloth is not less than 300mm when the color stripe cloth is lapped;
s5: laying a steel plate net: laying a steel plate net on the side slope according to the side slope support design, and pressing the dense mesh safety net and the color stripe cloth by using the steel plate net to prevent the dense mesh safety net and the color stripe cloth from falling off;
S6: excavating a water collecting well: determining the arrangement position of the water collecting well according to the main water spot position of the foundation pit bottom, the arrangement condition of the building vertical structure and the distance of the blind ditches converging into the water collecting well, and adopting a rotary excavator to excavate the water collecting well with the excavation depth of 5m and the diameter of 1200 mm;
S7: insert steel cartridge: after the water collecting well is dug, a steel filter cylinder is inserted in the middle of the water collecting well, cobbles are backfilled around the steel filter cylinder, and then a submersible pump is immersed in the steel filter cylinder to pump water;
S8: pouring bottom plate concrete: pouring bottom plate concrete on the side slope and the foundation pit bottom, pumping water in the water collecting well as much as possible when the bottom plate concrete is poured near the water collecting well, providing a submerged pump, then plugging a plastic barrel into a steel filter cylinder, pouring the water collecting well by adopting micro-expansion concrete with the same strength level as the bottom plate, pushing the plastic barrel to extrude downwards by the micro-expansion concrete in the pouring process, extruding water at the bottom of the steel filter cylinder through a filtering hole, expanding the plastic barrel, tightly combining with the steel filter cylinder, pouring together with the bottom plate concrete after the micro-expansion concrete overflows, and reserving a lower water stop ring in the middle of a concrete cushion layer and a upper water stop ring above the concrete cushion layer during pouring.
4. The construction method of the drainage construction structure of the blind ditch of the foundation pit according to claim 3, wherein the construction method comprises the following steps: the particle size of cobbles in the step S3 is not more than 50mm, the cobbles need to be cleaned before filling, the mud content is not more than 5%, and the sand content is not more than 4%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910394106.7A CN110241835B (en) | 2019-05-13 | 2019-05-13 | Drainage construction structure of foundation pit blind ditch and construction method thereof |
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| CN201910394106.7A CN110241835B (en) | 2019-05-13 | 2019-05-13 | Drainage construction structure of foundation pit blind ditch and construction method thereof |
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| CN110241835B true CN110241835B (en) | 2024-04-26 |
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| US5944453A (en) * | 1997-04-16 | 1999-08-31 | 998492 Ontario Inc. | Undercut excavation with protection against seismic events or excessive ground movement |
| CN101148884A (en) * | 2007-10-30 | 2008-03-26 | 山东天齐置业集团股份有限公司 | Waterproof and plugging construction method for precipitation well in foundation pit |
| CN102418347A (en) * | 2011-09-27 | 2012-04-18 | 天津住宅集团建设工程总承包有限公司 | Drainage construction method for blind drain and sump wells in deep foundation pit |
| CN202787334U (en) * | 2012-07-16 | 2013-03-13 | 杭州萧宏建设集团有限公司 | Sealing structure of deep well casing used during tunnel construction |
| CN104929143A (en) * | 2015-04-27 | 2015-09-23 | 华东交通大学 | Well sealing method of dewatering well at bottom of foundation pit |
| CN210315613U (en) * | 2019-05-13 | 2020-04-14 | 中建八局第二建设有限公司 | Foundation ditch blind ditch drainage construction structure |
-
2019
- 2019-05-13 CN CN201910394106.7A patent/CN110241835B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5944453A (en) * | 1997-04-16 | 1999-08-31 | 998492 Ontario Inc. | Undercut excavation with protection against seismic events or excessive ground movement |
| CN101148884A (en) * | 2007-10-30 | 2008-03-26 | 山东天齐置业集团股份有限公司 | Waterproof and plugging construction method for precipitation well in foundation pit |
| CN102418347A (en) * | 2011-09-27 | 2012-04-18 | 天津住宅集团建设工程总承包有限公司 | Drainage construction method for blind drain and sump wells in deep foundation pit |
| CN202787334U (en) * | 2012-07-16 | 2013-03-13 | 杭州萧宏建设集团有限公司 | Sealing structure of deep well casing used during tunnel construction |
| CN104929143A (en) * | 2015-04-27 | 2015-09-23 | 华东交通大学 | Well sealing method of dewatering well at bottom of foundation pit |
| CN210315613U (en) * | 2019-05-13 | 2020-04-14 | 中建八局第二建设有限公司 | Foundation ditch blind ditch drainage construction structure |
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