CN106401618A - Basin-shaped freezing water-stop system for water-enriched sandy gravel stratum deep-buried metro station - Google Patents
Basin-shaped freezing water-stop system for water-enriched sandy gravel stratum deep-buried metro station Download PDFInfo
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- CN106401618A CN106401618A CN201610867382.7A CN201610867382A CN106401618A CN 106401618 A CN106401618 A CN 106401618A CN 201610867382 A CN201610867382 A CN 201610867382A CN 106401618 A CN106401618 A CN 106401618A
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- 230000008014 freezing Effects 0.000 title claims abstract description 86
- 238000007710 freezing Methods 0.000 title claims abstract description 86
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000002689 soil Substances 0.000 claims abstract description 6
- 238000009412 basement excavation Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 description 45
- 230000011218 segmentation Effects 0.000 description 8
- 230000009189 diving Effects 0.000 description 7
- 239000004576 sand Substances 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 5
- 239000004744 fabric Substances 0.000 description 3
- 235000015110 jellies Nutrition 0.000 description 3
- 239000008274 jelly Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a basin-shaped freezing water-stop system for a water-enriched sandy gravel stratum deep-buried metro station. The basin-shaped freezing water-stop system for the water-enriched sandy gravel stratum deep-buried metro station comprises a bottom water sealing flat plate and a freezing curtain; the bottom water sealing flat plate is arranged inside an excavating range and comprises a plurality of first freezing holes so as to resist to the water pressure at the lower part of the excavating range; and the freezing curtain is arranged around the excavating range and comprises second freezing holes sequentially arranged around the excavating range so as to resist to the water and soil pressure around the excavating range.
Description
Technical field
The present invention relates to stratum excavation technical field of construction, the more particularly to buried Station of rich water sand-pebble layer
Basin shape freezes water-stopping system.
Background technology
With the development of China's economic, the quickening of urbanization process, urban population gets more and more, and dashes forward in urban traffic pressure
Aobvious, start to build Urban Underground track traffic for tackling the increasing city of this problem.But with urban underground space more closely
The Persisting exploitation in year, has following deeper subsurface Mining Problems：
(1) ground construction environment is complicated
The ground in metro station construction region is main roads, and is close to overpass, and earth's surface pipeline is more, to stratum settlement
Restriction have high demands, so specific aim measure should be taken in construction, reduce the impact to surrounding for the work progress it is ensured that earth's surface
Pipeline and the safety of building；
(2) water-bearing layer difficult treatment
According to hydrogeologic condition, the water table aquifer difference in distribution in the range of metro station construction is larger, aqueous abundant, and car
Stand bottom impervious stratum buried depth deeper, geological conditions fail to understand.So in construction, to the treatment measures containing diving stratum,
Particularly important to the safety of construction；
(3) ground does not possess execution conditions
Due to the restriction of traffic above-ground and the presence of overpass, ground does not possess execution conditions, when selecting construction, should
Consider the restriction of the execution conditions on ground；
(4) work progress environment limits greatly
Because ground does not possess execution conditions, all of construction needs to provide construction environment after pilot drive, so
Work progress is limited greatly by environment, during the tissue of the selection of construction method and work progress, needs to consider construction environment pair
The restriction of construction method；
It is desirable to the basin shape having a kind of buried Station of rich water sand-pebble layer is freezed water-stopping system and can be formed jelly
Hydraulic connection within and outside the region is excavated in knot body isolation, reaches sealing purpose.
Content of the invention
It is an object of the invention to provide a kind of basin shape of the buried Station of rich water sand-pebble layer freezes water-stopping system
To overcome the above-mentioned problems in the prior art.
For achieving the above object, the present invention provides a kind of basin shape of the buried Station of rich water sand-pebble layer to freeze sealing
System is it is characterised in that include：Bottom water shutoff flat board and freezing curtain, described bottom water shutoff flat board is arranged on and excavates scope
Inside, described bottom water shutoff flat board includes multiple first freezing holes, to resist the water pressure excavating scope bottom；Described freeze curtain
Curtain is arranged on around described excavation scope, and described freezing curtain includes being arranged in order second around described excavation scope setting
Freezing hole, to resist the Water And Earth Pressures excavating around scope.
Preferably, the lower section of described first freezing hole is vertically arranged vertical freezing pipe, the frost wall of described vertical freezing pipe
Thickness is 3m, and the spacing between described vertical freezing pipe is 2.5m, and the array pitch between described vertical freezing pipe is 2m.
Preferably, described second freezes in the hole setting periphery freezing pipe, and the Frozen wall thickness of described periphery freezing pipe is 2m,
Spacing between described periphery freezing pipe is 1.5m.
Preferably, described bottom water shutoff flat board adopts partial freezing's method to form water shutoff flat board in the bottom excavating scope.
Preferably, in skirt piles, when described skirt piles are constructed, described periphery freezing pipe is with institute for described periphery layout of freezing pipes
The steel reinforcement cage stating skirt piles is transferred to around described excavation scope.
The invention provides a kind of basin shape of the buried Station of rich water sand-pebble layer freezes water-stopping system, by this
The basin shape of the bright buried Station of rich water sand-pebble layer is freezed water-stopping system and can be effectively prevented excavation region water body stream
Dynamic, the border ring freezing curtain in the present invention and bottom water shutoff flat board are collectively forming the construction area of closing, make opening of the soil body
Dig and station structure construction is all carried out in the construction area of closing.
Brief description
Fig. 1 is the generalized section that basin shape freezes freezing pipe in water-stopping system.
Fig. 2 is that periphery freezes plane of arrangement schematic diagram in pile tube.
Specific embodiment
For making purpose, technical scheme and advantage that the present invention is implemented clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from start to finish or class
As the label element that represents same or similar element or there is same or like function.Described embodiment is the present invention
A part of embodiment, rather than whole embodiments.Embodiment below with reference to Description of Drawings is exemplary it is intended to use
In the explanation present invention, and it is not considered as limiting the invention.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of not making creative work, broadly falls into the scope of protection of the invention.Under
Face combines accompanying drawing and embodiments of the invention is described in detail.
In describing the invention it is to be understood that term " " center ", " longitudinal ", " horizontal ", "front", "rear",
The orientation of instruction such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward " or position relationship are based on accompanying drawing institute
The orientation showing or position relationship, are for only for ease of the description present invention and simplify description, rather than the dress of instruction or hint indication
Put or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that protecting to the present invention
The restriction of scope.
In the present invention one broad embodiment, a kind of basin shape of the buried Station of rich water sand-pebble layer freezes sealing system
System is it is characterised in that include：Bottom water shutoff flat board and freezing curtain, described bottom water shutoff flat board is arranged on and excavates the interior of scope
Portion, described bottom water shutoff flat board includes multiple first freezing holes, to resist the water pressure excavating scope bottom；Described freezing curtain
It is arranged on around described excavation scope, described freezing curtain includes being arranged in order around described the second jelly excavating scope setting
Knot hole, to resist the Water And Earth Pressures excavating around scope.
The basin shape of the buried Station of rich water sand-pebble layer is freezed water-stopping system and is included：Bottom water shutoff flat board and freeze curtain
Curtain, described bottom water shutoff flat board is arranged on the inside excavating scope, and described bottom water shutoff flat board includes multiple first freezing holes, with
The water pressure of scope bottom is excavated in opposing；Described freezing curtain is arranged on around described excavation scope, described freezing curtain bag
Include and be arranged in order around described the second freezing hole excavating scope setting, to resist the Water And Earth Pressures excavating around scope.
As shown in Figure 1-2, the lower section of described first freezing hole is vertically arranged vertical freezing pipe 1, described vertical freezing pipe 1
Frozen wall thickness is 3m, and the spacing between described vertical freezing pipe 1 is 2.5m, and the array pitch between described vertical freezing pipe 1 is 2m.
As shown in Figure 1-2, described second freeze in the hole setting periphery freezing pipe 2, described periphery freezing pipe 2 freeze wall thickness
Spend for 2m, the spacing between described periphery freezing pipe 2 is 1.5m.
Described bottom water shutoff flat board adopts partial freezing's method to form water shutoff flat board in the bottom excavating scope.
Described periphery freezing pipe 2 is arranged in skirt piles 3, and when described skirt piles 3 are constructed, described periphery freezing pipe 2 is with described
The steel reinforcement cage of skirt piles 3 is transferred to around described excavation scope.
No. 19 line Bei Taipingzhuangs station geological conditions：
1st, in the range of station, stratum is followed successively by from top to bottom：Silty clay 4. layer, Extra-fine sand 4. 3, cobble circle gravel 5., silty
Clay 6., 6. 2 layers of silt, detail sand 6. 3,7. 2 layers of Extra-fine sand, cobble 7. layer, cobble 9. layer, 9. 2 layers of Extra-fine sand.Vault is located at
3. 3 layers of Extra-fine sand, medium coarse sand 4. 4, base plate is located at cobble 9. layer, infiltration coefficient 150m/d.
2nd, perched water buried depth 2.5m～5.8m, dive under water (two) buried depth 11.2m～14.64m, at the vault of station, dives
Water (three) buried depth 26.6m～30.5m, 7m～11m above the base plate of station.
For No. 19 line stations, dive under water (two) buried depth 14.5m, and positioned at station vault, dive under water (three) buried depth 26.7m,
11.4m above the base plate of station.Take boring will dive under water (two) hydrophobic to diving (three) stratum after, diving (three) buried depth at
It is possible to plate in minus two layers of directly being constructed to station using commonsense method below plate in minus two layers of the station.
The key link of station construction is excavation and the structure construction on below plate in minus two floor in No. 19 line stations stratum, we
Case is mainly designed to solve the problems, such as construct in the stratum of below plate in minus two floor in No. 19 line stations, that is, contain in diving (three) stratum
Excavation and station construction, specific work progress carries out on plate in minus two layers completing, special instruction, practice of construction
In, if it find that the depth shallower of diving (three), cannot be constructed in minus two layers of station using commonsense method and, during plate, can construct
Extreme lower position, increase construction middle plate temporarily, middle plate temporarily carry out construction freezing method reinforcing, to separate subsoil water, subsequently
Processing method essentially identical.
Contain diving (three) stratum to process No. 19 19 lines, meet station and excavate and structure construction, using no water barrier " basin
Shape " freezes sealing scheme：
When no completely continuous water barrier or water barrier are deeper in stratum, vertical frozen can be laid in excavated section
Pipe, forms " artificial water barrier " using partial freezing's technology, and surrounding is laid freezing pipe along skirt piles and formed freezing curtain, freezing curtain
Hydraulic connection within and outside the region is excavated in " basin shape " freezes body isolation forming with " artificial water barrier ", reaches sealing purpose.
I.e. on plate in minus two floor in No. 19 line stations, arrange freezing hole, formation envelope around whole excavation construction region
The freezing curtain closing, under the water shutoff and maintenance effect of freezing curtain, carries out excavation and the structure construction of the soil body.
All of freezing hole is constructed on plate in minus two layers AT STATION, in the border excavating scope, when skirt piles are constructed in advance
Arrangement one circle freezing hole, forms the freezing curtain of ring, to resist the Water And Earth Pressures of surrounding.Close in the inside arrangement excavating scope
The freezing hole of cloth, forms water shutoff flat board (having some strength) using partial freezing's method in the bottom excavating scope, under opposing
The water pressure in portion.Border ring freezing curtain and bottom water shutoff flat board are collectively forming the construction area of closing, the excavation of the soil body and
Station structure construction is all carried out in the construction area of closing
No. 19 line diving three-level lines are under minus two floor base plate, accordingly, it would be desirable to vertically jelly of constructing on minus two layers of base plate
Knot pipe (calling middle plate freezing pipe in the following text), Frozen wall thickness takes 3m, backfill 1m thickness plain concrete cushion layer under negative Tipple Bottom plate, and middle plate freezes
Length of tube is 12.3m, and it is 22.3m that periphery freezes length of tube, and duration and cost for saving engineering can be by periphery layout of freezing pipes
In skirt piles, lagging edge pile driving construction is carried out simultaneously, saves drilling time and expense.
Solidification point：Actively -26 DEG C to -30 DEG C of freezing period brine temp, safeguards -25 DEG C of freezing period brine temp extremely -28
℃.- 10 DEG C of frost wall mean temperature.Periphery Frozen wall thickness takes 2m, and middle plate freezes tube pitch and controls in 2.5m, and array pitch controls
2m.
Cloth hole scheme in stake：Periphery freezes using single vertical cloth hole, and freezing pipe lagging edge pile cages are transferred to specific bit
Put, freeze tube pitch 1.5m, Frozen wall thickness takes 2m, when frozen soil column diameter develops into 2.2m, Frozen wall thickness reaches design
Require.
Freeze pipe size：Periphery freezing pipe a size of 159mm × 5mm, total length is freezed, middle plate freezing pipe a size of 127mm
× 5mm, partial freezing.
Because construction area area is larger, the construction period is long, for convenience organizing construction, by the distributing position of transverse passage-way,
Whole construction area is divided into five sections (L5, L6 spacing is larger, point two sections of constructions) along station length direction, transverse passage-way both sides adopt
The deep freezing curtain freezing (i.e. single freezing pipe does not adopt partial freezing's mode), forming closing in segmentation portion entirely, to facilitate group
Knit excavation construction.Between different sections, sequential organization construction is it is ensured that excavate the seriality with structure construction.Whole boundary of works area is divided into
Five construction segmentations, it is contemplated that construction infection each other, segmentation one and segmentation five can start simultaneously at construction, are then carried out
Segmentation two and the construction of segmentation four, finally carry out the construction of segmentation three.Respectively freeze inside segmentation, the freezing speed of middle freezing hole
Hurry up, excavation construction can excavate to surrounding from centre, excavation construction in advance saves the construction period.
Last it is to be noted that：Above example only in order to technical scheme to be described, is not intended to limit.To the greatest extent
Pipe has been described in detail to the present invention with reference to the foregoing embodiments, it will be understood by those within the art that：It is still
Technical scheme described in foregoing embodiments can be modified, or wherein some technical characteristics are carried out with equivalent replacing
Change；And these modifications or replacement, do not make the essence of appropriate technical solution depart from the essence of various embodiments of the present invention technical scheme
God and scope.
Claims (5)
1. the basin shape of the buried Station of rich water sand-pebble layer freezes water-stopping system it is characterised in that including：Bottom water shutoff is put down
Plate and freezing curtain, described bottom water shutoff flat board is arranged on the inside excavating scope, and described bottom water shutoff flat board includes multiple the
One freezing hole, to resist the water pressure excavating scope bottom；Described freezing curtain is arranged on around described excavation scope, described
Freezing curtain includes being arranged in order around described the second freezing hole excavating scope setting, to resist the water and soil excavating around scope
Pressure.
2. the basin shape of the buried Station of rich water sand-pebble layer as claimed in claim 1 freezes water-stopping system, and its feature exists
In the lower section of described first freezing hole is vertically arranged vertical freezing pipe, and the Frozen wall thickness of described vertical freezing pipe is 3m, described
Vertically the spacing between freezing pipe is 2.5m, and the array pitch between described vertical freezing pipe is 2m.
3. the basin shape of the buried Station of rich water sand-pebble layer as claimed in claim 1 freezes water-stopping system, and its feature exists
In described second freezes in the hole setting periphery freezing pipe, and the Frozen wall thickness of described periphery freezing pipe is 2m, and described periphery freezes
Spacing between pipe is 1.5m.
4. the basin shape of the buried Station of rich water sand-pebble layer as claimed in claim 1 freezes water-stopping system, and its feature exists
In described bottom water shutoff flat board adopts partial freezing's method to form water shutoff flat board in the bottom excavating scope.
5. the basin shape of the buried Station of rich water sand-pebble layer as claimed in claim 1 freezes water-stopping system, and its feature exists
In, in skirt piles, when described skirt piles are constructed, described periphery freezing pipe is with the reinforcing bar of described skirt piles for described periphery layout of freezing pipes
Cage is transferred to around described excavation scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610867382.7A CN106401618A (en) | 2016-09-30 | 2016-09-30 | Basin-shaped freezing water-stop system for water-enriched sandy gravel stratum deep-buried metro station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610867382.7A CN106401618A (en) | 2016-09-30 | 2016-09-30 | Basin-shaped freezing water-stop system for water-enriched sandy gravel stratum deep-buried metro station |
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| Publication Number | Publication Date |
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| CN106401618A true CN106401618A (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610867382.7A Pending CN106401618A (en) | 2016-09-30 | 2016-09-30 | Basin-shaped freezing water-stop system for water-enriched sandy gravel stratum deep-buried metro station |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869946A (en) * | 2017-03-13 | 2017-06-20 | 北京城建集团有限责任公司 | Make bottom frozen construction method in a kind of sand-pebble layer tunneling subway station |
| CN109594994A (en) * | 2018-11-29 | 2019-04-09 | 上海市机械施工集团有限公司 | Tunneling method under existing building |
| CN109915173A (en) * | 2019-03-22 | 2019-06-21 | 北京城建集团有限责任公司 | A kind of buried pipe curtain support construction and pilot tunnel water storage system |
| CN115262603A (en) * | 2022-05-24 | 2022-11-01 | 北京城建道桥建设集团有限公司 | Urban underground construction freezing and water-resisting method without influence on earth surface |
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| JPH1096398A (en) * | 1996-09-24 | 1998-04-14 | Fujimori Kogyo Kk | Fitting structure of relief valve for water stop sheet |
| CN201460904U (en) * | 2009-06-29 | 2010-05-12 | 上海市基础工程公司 | Ultra-long horizontal freezing consolidation structure for shield entry |
| CN104405400A (en) * | 2014-10-08 | 2015-03-11 | 海南大学 | Method for arranging cup-shaped horizontal freezing holes in end of large-diameter shield tunnel |
| CN105909260A (en) * | 2016-06-16 | 2016-08-31 | 山东省地矿工程勘察院 | Subway station water stop structure for protecting groundwater environment and construction method thereof |
| CN105908765A (en) * | 2016-06-16 | 2016-08-31 | 中铁工程设计咨询集团有限公司 | Open-excavated tunnel water stopping structure for protecting groundwater environment and construction method |
| CN105951860A (en) * | 2016-06-24 | 2016-09-21 | 北京城建集团有限责任公司 | Slanting freezing bottom-making water stop structure for interior and side faces of underground excavated foundation pit and method |
| CN206111218U (en) * | 2016-09-30 | 2017-04-19 | 北京城建集团有限责任公司 | Rich water sand cobble stratum buries basin shape of secretly digging station deeply and freezes stagnant water system |
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2016
- 2016-09-30 CN CN201610867382.7A patent/CN106401618A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1096398A (en) * | 1996-09-24 | 1998-04-14 | Fujimori Kogyo Kk | Fitting structure of relief valve for water stop sheet |
| CN201460904U (en) * | 2009-06-29 | 2010-05-12 | 上海市基础工程公司 | Ultra-long horizontal freezing consolidation structure for shield entry |
| CN104405400A (en) * | 2014-10-08 | 2015-03-11 | 海南大学 | Method for arranging cup-shaped horizontal freezing holes in end of large-diameter shield tunnel |
| CN105909260A (en) * | 2016-06-16 | 2016-08-31 | 山东省地矿工程勘察院 | Subway station water stop structure for protecting groundwater environment and construction method thereof |
| CN105908765A (en) * | 2016-06-16 | 2016-08-31 | 中铁工程设计咨询集团有限公司 | Open-excavated tunnel water stopping structure for protecting groundwater environment and construction method |
| CN105951860A (en) * | 2016-06-24 | 2016-09-21 | 北京城建集团有限责任公司 | Slanting freezing bottom-making water stop structure for interior and side faces of underground excavated foundation pit and method |
| CN206111218U (en) * | 2016-09-30 | 2017-04-19 | 北京城建集团有限责任公司 | Rich water sand cobble stratum buries basin shape of secretly digging station deeply and freezes stagnant water system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869946A (en) * | 2017-03-13 | 2017-06-20 | 北京城建集团有限责任公司 | Make bottom frozen construction method in a kind of sand-pebble layer tunneling subway station |
| CN106869946B (en) * | 2017-03-13 | 2019-08-20 | 北京城建集团有限责任公司 | Make bottom frozen construction method in a kind of sand-pebble layer tunneling subway station |
| CN109594994A (en) * | 2018-11-29 | 2019-04-09 | 上海市机械施工集团有限公司 | Tunneling method under existing building |
| CN109915173A (en) * | 2019-03-22 | 2019-06-21 | 北京城建集团有限责任公司 | A kind of buried pipe curtain support construction and pilot tunnel water storage system |
| CN109915173B (en) * | 2019-03-22 | 2023-11-21 | 北京城建集团有限责任公司 | Underground pipe curtain supporting structure and pilot tunnel water storage system |
| CN115262603A (en) * | 2022-05-24 | 2022-11-01 | 北京城建道桥建设集团有限公司 | Urban underground construction freezing and water-resisting method without influence on earth surface |
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Application publication date: 20170215 |