CN104775438B - The method of tower position foundation pit construction in karst landform basis rainy season - Google Patents
The method of tower position foundation pit construction in karst landform basis rainy season Download PDFInfo
- Publication number
- CN104775438B CN104775438B CN201510162456.2A CN201510162456A CN104775438B CN 104775438 B CN104775438 B CN 104775438B CN 201510162456 A CN201510162456 A CN 201510162456A CN 104775438 B CN104775438 B CN 104775438B
- Authority
- CN
- China
- Prior art keywords
- foundation ditch
- karst landform
- construction
- excavation
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010276 construction Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000009412 basement excavation Methods 0.000 claims abstract description 44
- 241000521257 Hydrops Species 0.000 claims abstract description 24
- 206010030113 Oedema Diseases 0.000 claims abstract description 24
- 244000309464 bull Species 0.000 claims abstract description 18
- 238000005422 blasting Methods 0.000 claims abstract description 15
- 238000005266 casting Methods 0.000 claims abstract description 12
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 5
- 235000009566 rice Nutrition 0.000 claims abstract description 5
- 239000004576 sand Substances 0.000 claims abstract description 5
- 239000010902 straw Substances 0.000 claims abstract description 5
- 240000007594 Oryza sativa Species 0.000 claims abstract 2
- 239000011435 rock Substances 0.000 claims description 16
- 238000009825 accumulation Methods 0.000 claims description 14
- 238000005086 pumping Methods 0.000 claims description 5
- 239000003673 groundwater Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 6
- 206010057071 Rectal tenesmus Diseases 0.000 abstract description 2
- 208000012271 tenesmus Diseases 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 241000209094 Oryza Species 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 244000098338 Triticum aestivum Species 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- -1 molten Substances 0.000 description 1
- 238000005036 potential barrier Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- 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
- E02D19/02—Restraining of open water
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to the method for tower position foundation pit construction in a kind of karst landform basis rainy season, it is characterized in that: adopt water mill to bore excavation or ladder alternate type Blasting Excavation foundation ditch, and when foundation ditch panelling construction, pre-buried PVC aqueduct, the mouth of pipe adopts dry rice straw, fine and closely woven sand net to wrap up；Hydrops is divided into serious, medium, general, for the karst landform foundation ditch that hydrops is serious, bright drainage should be adopted to excavate；For the karst landform foundation ditch that hydrops is medium, concreting should adopt funnel to promote concrete placed under water method；For long-pending watery karst landform foundation ditch, concreting should adopt bull ladle to draw water casting concrete method.The method of the present invention can be effectively improved the efficiency of tower position foundation pit construction, improves the safety of construction, it is to avoid tenesmus in foundation pit construction process and collapsing.
Description
Technical field
The present invention relates to the method for tower position foundation pit construction in karst landform basis rainy season.
Background technology
Power transmission Guangdong, waxy common wheat power station ± 800kV DC power transmission line engineering 14 is marked, and rises from Lu Qi village, Wuming County head of the horse town (D193), terminates in Dong Long Zhen Mo village, Tantang District, Guigang (J401).Line length 95.8km, newly-built steel tower 187 base, wherein anchor support 34 base, tangent tower 153 base.Line route by way of Wuming County head of the horse town, Xiang Xian town, Shanglin County, Xin Xu town, Binyang County, Zou Xu town, Yang Qiao town, He Ji town, Lignum cinnamomi camphorae township, Tantang District, Guigang, Meng Gong township, Beixiang, mountain, Dong Long town.Iron tower foundation adopts board-like column foundation (31 base), digging foundation (146 base), Rock Embed based (10 base).Collecting statistics according to the landform of job site, geology, geomorphologic characteristics, wherein karst landform basis amounts to 105 bases；Annual time in rainy season from February is to JIUYUE.Karst landform has features such as " rock, molten, water ", combine data of surveying and excavation discloses according to this bid section tower position is relevant: 0～2.0m below foundation ditch earth's surface range for thickness not etc., the argillic horizon that differs of state, below-2.0m be in, micro-weathered rock, rock mass fracture growth degree is different because of tower position, filling in crack, is mingled with water body and earth.Construction period is affected by continuing heavy showers, and level of ground water is high, and crevice water reaches full growth, enriches.Owing to the construction of this engineering foundation is concentrated mainly on the first half of the year with heavy rainfall, lasting heavy showers and season water level excavation of foundation pit and concreting are brought bigger difficulty.For the tower position foundation ditch of cranny development, along with the decline in excavation of foundation pit face, foundation ditch surrounding Image of Flat Ground and around tor hydrops because potential barrier is to excavating low hole place.In charge for remittance process, folder in crack soil with gesture under, form one stock " mud-rock flow ", thus being buried by excavation pit.At present, transmission line construction field at home, the construction method on the karst landform basis under normal weather conditions is comparatively ripe.For the rainy season construction on karst landform basis, but rarely have report and introduce.When karst landform foundation construction is in continuous print heavy showers season, the earth that abundant rainwater will be carried secretly in lapies, groove, pour into hypsography low-lying place, cause bigger difficulty to excavation of foundation pit；Meanwhile, the existence on hydrops in foundation ditch, underground karst cavity, lapies, gully and underground river, concrete building be there is also certain impact, have a strong impact on excavation of foundation pit and concrete pouring quality.
At present, transmission line construction field at home, the construction method on the karst landform basis under normal weather conditions is comparatively ripe.For the rainy season construction on karst landform basis, but rarely have report and introduce.Large-scale karst landform basis rainy season construction still belongs to the first time.Basis rainy season construction, foundation ditch internal water accumulation is the biggest obstacle stopping construction.For the problem of water, the most conventional construction method is water blockoff, and chocking bodies of water is assembled in foundation ditch, but the maximum characteristic of water is its mobility and hydraulic pressure, is continuously increased with foundation depth, and hydraulic pressure constantly increases, the active force of foundation pit walls is constantly strengthened by water body, and foundation pit walls risk of caving in constantly promotes.High for water level, soil layer thick, the rock pit of cranny development, water blockoff can cause that foundation ditch retaining wall outer clay blocks for a long time because of hydrops, soak and softens, so that dropping, collapsing under Gravitative Loads.For the feature of karst landform basis rainy season construction, the typical construction method that exploration, total junction formation are suitable for about the rainy season construction of karst landform basis, there is significantly high practical value.
Summary of the invention
It is an object of the invention to provide the method for tower position foundation pit construction in a kind of karst landform basis rainy season, can effectively solve the problems referred to above.
The present invention adopts below scheme to realize: the method for tower position foundation pit construction in a kind of karst landform basis rainy season, it is characterized in that: adopt water mill to bore excavation or ladder alternate type Blasting Excavation foundation ditch, and when foundation ditch panelling construction, pre-buried PVC aqueduct, the mouth of pipe adopts dry rice straw, fine and closely woven sand net to wrap up；Hydrops is divided into serious, medium, general, for the karst landform foundation ditch that hydrops is serious, bright drainage should be adopted to excavate；For the karst landform foundation ditch that hydrops is medium, concreting should adopt funnel to promote concrete placed under water method；For long-pending watery karst landform foundation ditch, concreting should adopt bull ladle to draw water casting concrete method.
In an embodiment of the present invention, bull ladle draw water casting concrete time, adopt pumping equipment pit water accumulation is evacuated to hole the end meet concreting requirement after-pouring concrete；Hole wall current adopt bull ladle to draw water, and are highly continuously increased with concreting, constantly promote bull ladle until concrete surface exceeds level of ground water, then remove bull ladle.
In an embodiment of the present invention, water mill drill mechanical excavating load should be adopted at the excavation construction of the karst landform basis foundation ditch in rainy season of middle air slaking and following rock；At the karst landform basis excavation of foundation pit in rainy season of middle air slaking and slightly weathered rock, ladder alternate type Blasting Excavation method should be adopted.
In an embodiment of the present invention, described ladder alternate type Blasting Excavation is that low-lying hydrops face is used for taking out, draining, and step raised face (RF) is used for the cutting of borehole, Blasting Excavation foundation ditch by upper and lower circulation excavation, iterative method.
The method of the present invention can be effectively improved the efficiency of tower position foundation pit construction, improves the safety of construction, it is to avoid tenesmus in foundation pit construction process and collapsing.
Detailed description of the invention
Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, below the specific embodiment of the present invention is described in detail.
Elaborate detail in the following description so that fully understanding the present invention.But the present invention can be different from alternate manner described here implement with multiple, and those skilled in the art can do similar popularization when without prejudice to intension of the present invention.Therefore the present invention is not by the restriction of following public detailed description of the invention.
The present embodiment discloses the method for tower position foundation pit construction in a kind of karst landform basis rainy season, it is characterized in that: adopt water mill to bore excavation or ladder alternate type Blasting Excavation foundation ditch, and when foundation ditch panelling construction, pre-buried PVC aqueduct, the mouth of pipe adopts dry rice straw, fine and closely woven sand net to wrap up；Hydrops is divided into serious, medium, general, for the karst landform foundation ditch that hydrops is serious, bright drainage should be adopted to excavate；For the karst landform foundation ditch that hydrops is medium, concreting should adopt funnel to promote concrete placed under water method；For long-pending watery karst landform foundation ditch, concreting should adopt bull ladle to draw water casting concrete method.Wherein Three Estate serious, medium, general is determined at foundation depth according to hydrops.
Concrete, below various situations are described in detail:
1. water is easily led, is not easily blocked up: during the rainy season construction of karst landform basis, foundation ditch water body is not take close measure, but the measure of dredging should be taked, namely when foundation ditch panelling construction, pre-buried PVC aqueduct, the mouth of pipe adopts dry rice straw, fine and closely woven sand net to wrap up, and can prevent " mud-rock flow " obstruction conduit, the hydrops of foundation pit walls can be introduced in foundation ditch again and " lead and make it ", to avoid foundation pit walls to cave in.
2. water mill bores excavation pit: water mill drill mechanical has excavation rock ability strong (formation hardness is up to 6～7 grades), speed is fast, effect is high, simple to operate, can water be constructed continuously, the karst landform basis excavation in rainy season of air slaking and following rock in being suitable for.
3. ladder alternate type Blasting Excavation method: for the excavation of middle air slaking and slightly weathered rock foundation ditch, must adopt the mode of explosive blasting to carry out；In blast working process, affect the cutting of borehole for preventing foundation ditch internal water accumulation excessive, ladder alternate type digging mode can be taked.Ladder alternate type Blasting Excavation foundation ditch construction method is mainly by limited for bore basis " point and make it ", upper and lower circulation excavation, iterative method；Low-lying hydrops face is used for taking out, draining, and step raised face (RF) is used for the cutting of borehole, Blasting Excavation foundation ditch.
4. " cloth pocket " cuts drainage: bright drainage.For the foundation ditch that hydrops is serious, multiple stage immersible pump (4～5) need to be adopted to carry out taking out, draining.Immersible pump quantity is more many, and the space occupied in foundation ditch is more big, and in hole, effective operation space is more little, thus greatly reducing the excavation scope of operation, hence it is evident that reduce efficiency of construction；Immersible pump quantity is more few, and foundation ditch internal water accumulation can not drain, and excavation of foundation pit cannot be performed continuously over.Adopt " cloth pocket " to cut drainage, by water " cut and make it ", it is achieved hole internal water accumulation and hole wall flowing water, upper strata " dividing and rule ", fundamentally solve the construction difficult problems such as hole internal water accumulation, narrow space, excavation work efficiency be low.
5. funnel promotes concrete placed under water: for the foundation ditch of water yield especially severe, and hole wall current have that stock is many, measure big feature, water-pumping/draining equipment cannot pump drainage foundation ditch internal water accumulation to the greatest extent, conventional concrete casting method is difficult to ensure that concrete pouring construction quality.Utilize underwater cast-in-place pile base concrete pouring construction principle, adopt the pouring construction method of funnel " carry and make it ", can effectively ensure that the concrete pouring quality of the serious foundation ditch of hydrops.
6. bull ladle draws water casting concrete method: when foundation ditch internal water accumulation is more serious and general, in concrete pouring construction process, can adopt water-pumping/draining equipment pump drainage pit water accumulation, then casting concrete.If foundation ditch internal water accumulation can pump drainage clean, then concrete pouring construction method construction routinely；If foundation ditch internal water accumulation cannot pump drainage clean, multiple stage immersible pump collection squeezes in foundation ditch, and concrete casting, vibration are made a big impact, simultaneously, easily concrete is broken up along the hole top-down flowing water of wall, cause concrete disintegration, have a strong impact on concrete pouring quality and tower position safety.Bull ladle draw water casting concrete time, adopt pumping equipment pit water accumulation is evacuated to hole the end meet concreting requirement after-pouring concrete；Hole wall current adopt bull ladle to draw water, and are highly continuously increased with concreting, constantly promote bull ladle until concrete surface exceeds level of ground water, then remove bull ladle.
Can sum up: the method for the present invention include following some: 1. during the excavation of foundation pit in rainy season of karst landform basis, should follow that water is easily led, not easily stifled principle carries out water body process, then can carrying out excavation of foundation pit, excavation of foundation pit is safe and reliable, foundation ditch Forming Quality is excellent.2. in, the karst landform basis excavation in rainy season of air slaking and following rock should adopt water mill drill mechanical.3. the karst landform basis excavation of foundation pit in rainy season of air slaking and slightly weathered rock in, should adopt ladder alternate type Blasting Excavation method.4. the karst landform foundation ditch that hydrops is serious, should adopt " cloth pocket " to cut drainage excavation.5. the foundation ditch of hydrops especially severe, concreting should adopt funnel to promote concrete placed under water method.6., when foundation ditch internal water accumulation is more serious and general, concreting should adopt bull ladle to draw water casting concrete method.
Although the present invention is with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art are without departing from the spirit and scope of the present invention; may be by the method for the disclosure above and technology contents and technical solution of the present invention is made possible variation and amendment; therefore; every content without departing from technical solution of the present invention; according to any simple modification, equivalent variations and modification that above example is made by the technical spirit of the present invention, belong to the protection domain of technical solution of the present invention.The foregoing is only presently preferred embodiments of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of the present invention.
Claims (4)
1. the method for tower position foundation pit construction in karst landform basis rainy season, it is characterized in that: adopt water mill to bore excavation or ladder alternate type Blasting Excavation foundation ditch, and when foundation ditch panelling construction, pre-buried PVC aqueduct, the mouth of pipe adopts dry rice straw or fine and closely woven sand net to wrap up；Hydrops is divided into serious, medium, general, for the karst landform foundation ditch that hydrops is serious, bright drainage should be adopted to excavate；For the karst landform foundation ditch that hydrops is medium, concreting should adopt funnel to promote concrete placed under water method；For long-pending watery karst landform foundation ditch, concreting should adopt bull ladle to draw water casting concrete method；Funnel promotes water for utilizing underwater cast-in-place pile base concrete pouring construction principle, is constantly promoted by funnel, it is prevented that the pouring construction method that described PVC aqueduct is blocked.
2. the method for tower position foundation pit construction in karst landform basis according to claim 1 rainy season, it is characterised in that: bull ladle draw water casting concrete time, adopt pumping equipment that pit water accumulation is evacuated to the end, hole and meet concreting requirement after-pouring concrete；Hole wall current adopt bull ladle to draw water, and are highly continuously increased with concreting, constantly promote bull ladle until concrete surface exceeds level of ground water, then remove bull ladle.
3. the method for tower position foundation pit construction in karst landform basis according to claim 1 rainy season, it is characterised in that: the excavation construction at the karst landform basis foundation ditch in rainy season of middle air slaking and highly weathered rock should adopt water mill drill mechanical excavating load；At the karst landform basis excavation of foundation pit in rainy season of middle air slaking and slightly weathered rock, ladder alternate type Blasting Excavation method should be adopted.
4. the method for tower position foundation pit construction in karst landform basis according to claim 1 rainy season, it is characterized in that: described ladder alternate type Blasting Excavation is by upper and lower circulation excavation, iterative method, low-lying hydrops face is used for taking out, draining, and step raised face (RF) is used for the cutting of borehole, Blasting Excavation foundation ditch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510162456.2A CN104775438B (en) | 2015-04-08 | 2015-04-08 | The method of tower position foundation pit construction in karst landform basis rainy season |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510162456.2A CN104775438B (en) | 2015-04-08 | 2015-04-08 | The method of tower position foundation pit construction in karst landform basis rainy season |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104775438A CN104775438A (en) | 2015-07-15 |
| CN104775438B true CN104775438B (en) | 2016-06-29 |
Family
ID=53617178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510162456.2A Active CN104775438B (en) | 2015-04-08 | 2015-04-08 | The method of tower position foundation pit construction in karst landform basis rainy season |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104775438B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201009B (en) * | 2015-09-12 | 2017-01-25 | 国网辽宁省电力有限公司锦州供电公司 | Tower foundation negative-pressure construction method for river channel |
| CN105484269B (en) * | 2015-10-20 | 2017-08-11 | 中铁十六局集团北京轨道交通工程建设有限公司 | Foundation pit enclosure structure seepage prevention and treatment construction method under blasting condition |
| CN106592756A (en) * | 2017-01-23 | 2017-04-26 | 中国建筑第四工程局有限公司 | Karst region step-type basement water drainage structure and construction method thereof |
| CN112982051B (en) * | 2021-02-20 | 2024-04-26 | 温俊魁 | Roadbed suitable for karst landform and construction method |
| CN115354704B (en) * | 2022-08-11 | 2023-11-03 | 中国水利水电第十一工程局有限公司 | Water seepage grooving treatment method for karst foundation of fan foundation of plain wind farm |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA948867A (en) * | 1970-01-02 | 1974-06-11 | Lee A. Turzillo | Method and means for producing sub-aqueous and other cast-in-place concrete structures in situ |
| GB2200155A (en) * | 1986-12-12 | 1988-07-27 | Comporgan Rendszer Kozos Vall | A method for the construction of catchwater drains, drain ribs or supporting ribs, temporary supporting structures and water collecting-aquiferous blocks therefor |
| CN101748741A (en) * | 2009-12-18 | 2010-06-23 | 中冶交通工程技术有限公司 | Construction method of concrete supporting structure |
| CN101806066A (en) * | 2010-03-26 | 2010-08-18 | 重庆钢铁(集团)有限责任公司 | Method for molding vertical wall of deep foundation pit |
| CN102278063A (en) * | 2011-05-13 | 2011-12-14 | 四川省第三建筑工程公司 | Water-mill drilling construction process for Karst terrain |
| KR20120011120A (en) * | 2010-07-28 | 2012-02-07 | 홍문표 | installation of the waterproof cloths for work of the pier under water |
| CN103485336A (en) * | 2013-09-30 | 2014-01-01 | 中铁二十局集团有限公司 | Drilling pile drilling construction method of bead-type karst area |
-
2015
- 2015-04-08 CN CN201510162456.2A patent/CN104775438B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA948867A (en) * | 1970-01-02 | 1974-06-11 | Lee A. Turzillo | Method and means for producing sub-aqueous and other cast-in-place concrete structures in situ |
| GB2200155A (en) * | 1986-12-12 | 1988-07-27 | Comporgan Rendszer Kozos Vall | A method for the construction of catchwater drains, drain ribs or supporting ribs, temporary supporting structures and water collecting-aquiferous blocks therefor |
| CN101748741A (en) * | 2009-12-18 | 2010-06-23 | 中冶交通工程技术有限公司 | Construction method of concrete supporting structure |
| CN101806066A (en) * | 2010-03-26 | 2010-08-18 | 重庆钢铁(集团)有限责任公司 | Method for molding vertical wall of deep foundation pit |
| KR20120011120A (en) * | 2010-07-28 | 2012-02-07 | 홍문표 | installation of the waterproof cloths for work of the pier under water |
| CN102278063A (en) * | 2011-05-13 | 2011-12-14 | 四川省第三建筑工程公司 | Water-mill drilling construction process for Karst terrain |
| CN103485336A (en) * | 2013-09-30 | 2014-01-01 | 中铁二十局集团有限公司 | Drilling pile drilling construction method of bead-type karst area |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104775438A (en) | 2015-07-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104775438B (en) | The method of tower position foundation pit construction in karst landform basis rainy season | |
| CN104131575A (en) | Plugging and drainage method for dam foundation on karst highly developed stratum | |
| CN106087953B (en) | A kind of drainage and construction method for preventing and treating mountain area large size spoil ground mud-rock flow | |
| CN108797618A (en) | One kind being used for Urban Underground pipe gallery drainage of foundation pit structure and its construction method | |
| CN105714772A (en) | Re-drilling concrete wall protecting method for hole formation of rock-socketed pile in karst region | |
| CN103046931A (en) | Method for forming holes of vertical shaft/pilot shaft through impact type drilling machine in impacting mode | |
| CN108951641A (en) | It is a kind of for the compound support method of ultra-deep pipe gallery foundation trench in water river | |
| CN105112652B (en) | A kind of rare earth ore in-situ leaching disposing mother liquor canal body structure | |
| CN108867673A (en) | A kind of underwater prevention method in the foundation pit based on the curtain that draws water | |
| CN204551510U (en) | A kind of filled-up ground catchments pressure reduction well drop and drainage structure | |
| CN106703053A (en) | Construction method for reinforced soil drainage composite revetment structure | |
| CN102425179B (en) | Reinforced soil infiltration ditch structure supported by miniature steel pipe cast-in-place pile | |
| CN1063518C (en) | Drainage cut-off (deep ditch high-building method) drainage and supplying optimization combination for preventing and harnessing groud water | |
| CN110804994B (en) | Reservoir dam construction method | |
| CN111424685A (en) | Deep water falling hole processing structure and method for backfilling foundation in large karst depression | |
| CN104846837B (en) | The construction method of ultra-deep well in a kind of bright draining foundation ditch | |
| CN110185051A (en) | Deep narrow excavation water discharge method | |
| CN212405178U (en) | Deep water falling hole processing structure of backfill foundation in large karst depression | |
| CN203924005U (en) | The structure of building a dam of banketing in the cumulosol layer of waters | |
| CN210049908U (en) | Earth surface gully paving structure and shallow-buried section tunnel structure | |
| CN103774698B (en) | Drainage-free construction method for soil engineering | |
| CN208266895U (en) | Cofferdam is built in returning for seabed tunnel point storehouse construction | |
| CN105155478B (en) | A kind of new damming dam reinforces Application way | |
| CN217923677U (en) | Foundation anti-impact structure | |
| CN105064384A (en) | Vacuum tube well precipitation system under special geological conditions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |