CN108104144A - Subtract the highly permeable stratum deep basal pit Groundwater Control method and structure oozed based on decompression - Google Patents
Subtract the highly permeable stratum deep basal pit Groundwater Control method and structure oozed based on decompression Download PDFInfo
- Publication number
- CN108104144A CN108104144A CN201810018557.6A CN201810018557A CN108104144A CN 108104144 A CN108104144 A CN 108104144A CN 201810018557 A CN201810018557 A CN 201810018557A CN 108104144 A CN108104144 A CN 108104144A
- Authority
- CN
- China
- Prior art keywords
- decompression
- foundation pit
- subtract
- highly permeable
- infiltration layer
- 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.)
- Pending
Links
- 230000006837 decompression Effects 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000003673 groundwater Substances 0.000 title claims abstract description 27
- 230000008595 infiltration Effects 0.000 claims abstract description 52
- 238000001764 infiltration Methods 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000010276 construction Methods 0.000 claims abstract description 25
- 238000009412 basement excavation Methods 0.000 claims abstract description 14
- 230000003204 osmotic effect Effects 0.000 claims abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 230000004888 barrier function Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- 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
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of highly permeable stratum deep basal pit Groundwater Control methods for being subtracted based on decompression and being oozed, when excavation is carried out under highly permeable formation condition, in foundation pit surrounding, fluid-tight building enclosure is set, being set in bottom of foundation ditch simultaneously can part be permeable, infiltration coefficient for the decompression of bottom of foundation ditch original stratum osmotic coefficient 1%~2% subtracts infiltration layer and underground water is controlled with some strength, part underground water is allowed to subtract infiltration layer by decompression and penetrates into foundation pit, reduces and acts on the water pressure that bottom of foundation ditch decompression subtracts infiltration layer.Difficulty of construction of the present invention is small, low engineering cost, small on the influence of foundation pit surrounding enviroment, convenient for engineer application.
Description
Technical field
The present invention relates to the process field of deep foundation pit construction underground water, it is particularly a kind of with subtracting the highly permeable that oozes based on decompression
Layer depth foundation pit Groundwater Control method and structure.
Background technology
When carrying out deep pit construction on highly permeable stratum, it is necessary to underground water be controlled, otherwise easily cause base
The engineering accidents such as hole bottom generates piping, quicksand, bottom of foundation ditch unstability, entire instability of foundation pit cave in.
Highly permeable stratum deep foundation pit construction Groundwater Control method is mainly the following both at home and abroad at present.
（1）Open type drainage.This method is not provided with any water seal curtain measure, sets dewatering well will directly in foundation pit
Outside underground water discharge foundation pit in foundation pit.This method needs to discharge in the process due to underground water connection inside and outside foundation pit, foundation pit construction
Substantial amounts of underground water, effluent cost is high, and cost is big, and base pit dewatering can cause foundation pit surrounding formations significantly sedimentation occur, influence base
Cheat the safe to use of surrounding building.Therefore this method is general only just has when drawdown is smaller.
（2）Vertical water-stop curtain method.This method is on the outside of deep basal pit using diaphram wall or mixing pile etc. as vertical
Water-stop curtain, vertical water-stop curtain bottom are stretched into basement rock water barrier, block the hydraulic connection inside and outside foundation pit, excavation of foundation pit completely
It only needs to exclude the underground water inside foundation pit in construction.This method is more practical when shallower to water barrier buried depth, works as base
When hole bottom water barrier buries deeper, vertical water-stop curtain difficulty of construction is big, and cost is high, and construction quality cannot be guaranteed, often go out
The engineering accidents such as instability of foundation pit caused by existing curtain seepage water.
（3）Vertical suspension type water-stop curtain.This method is still adopted for the larger situation of bottom of foundation ditch water barrier buried depth
With vertical water-stop curtain, but curtain depth is smaller, does not stretch into water barrier, in foundation pit construction inside foundation pit using gully into
Row draws water.This method can reduce the displacement of foundation pit to a certain extent, but since vertical curtain does not separate underground inside and outside foundation pit
The contact of water, foundation pit construction still need to discharge substantial amounts of underground water in the process, and effluent cost is high, and cost is big, and base pit dewatering can be led
Foundation pit surrounding formations is caused significantly sedimentation occur, influence the safe to use of buildings around foundation pit；Especially for the depth for closing on rivers
Foundation pit, the level of ground water in foundation pit are difficult to drop to predetermined depth, and effluent cost is high.
（4）Horizontal seals method.This method is equally for the larger situation of bottom of foundation ditch water barrier buried depth, using vertical
Water-stop curtain and Horizontal seals curtain joint carry out Groundwater Control, also only need to exclude the ground inside foundation pit in excavation
Lower water.This method has also separated the hydraulic connection of underground water inside and outside foundation pit completely, only needs to exclude base in excavation
Underground water inside hole, but the Horizontal seals curtain of this method bottom of foundation ditch bears great groundwater pressure and soil pressure,
Horizontal seals curtain is easily caused to generate destruction under the synergy of Water And Earth Pressures, therefore needs to seal level in practice of construction
Bottom curtain is arranged on the depth of 15-25m or so below base plate of foundation pit, and corresponding vertical curtain is also required to set to corresponding depth
Degree, horizontal and vertical curtain difficulty of construction is very big, and cost is high, and construction quality cannot guarantee that.
In summary analysis is understood, at present the control of domestic and international existing highly permeable stratum deep pit construction underground water
Method is mainly full draining and full closure two ways.Full water discharge method effluent cost is high, and the environment on periphery is influenced greatly, in base
Precipitation difficulty is big when there is water source on hole periphery.Full method for blocking difficulty of construction is big, and cost is high, and construction quality is difficult to ensure that.
Therefore, develop it is a kind of it is new, safe and reliable, difficulty of construction is small, the highly permeable stratum deep basal pit of low engineering cost is applied
Work Groundwater Control structure has been to be badly in need of.
The content of the invention
The technical problems to be solved by the invention are that a kind of difficulty of construction is small, and engineering is made in view of the shortcomings of the prior art, providing
Valency is low, subtracts the highly permeable stratum deep basal pit Groundwater Control method and structure oozed based on decompression convenient for engineer application.
In order to solve the above technical problems, the technical solution adopted in the present invention is：It is a kind of to subtract the highly permeable oozed based on decompression
Stratum deep basal pit Groundwater Control method when excavation is carried out under highly permeable formation condition, is set in bottom of foundation ditch
With some strength simultaneously can the permeable decompression in part subtract infiltration layer underground water controlled, which subtracts infiltration layer infiltration coefficient and is
The 1%~2% of bottom of foundation ditch original stratum osmotic coefficient allows part underground water to subtract infiltration layer by decompression and penetrates into foundation pit, reduction effect
Subtract the water pressure of infiltration layer in bottom of foundation ditch decompression, which subtracts infiltration layer intensity as 5 ~ 8MPa.
The decompression is subtracted infiltration layer and is constructed using sleeve valve barrel grouting（The cooperation of sleeve valve barrel grouting is determined by field test
Than）, carry out being depressured the construction for subtracting infiltration layer from earth's surface first before excavation of foundation pit, then carry out excavation of foundation pit.
Gully inside foundation pit is set during excavation, penetrates into the ground in foundation pit by infiltration layer is subtracted by decompression
Outside lower water discharge foundation pit.
Correspondingly, it is provided by the invention it is a kind of the highly permeable stratum deep basal pit Groundwater Control method oozed is subtracted based on decompression,
Foundation pit surrounding is provided with fluid-tight vertical water-stop curtain（Diaphram wall）, depth should reach decompression subtract infiltration layer bottom 1m with
Under, to prevent underground water from entering foundation pit from foundation pit surrounding.
The decompression subtracts infiltration layer and is arranged at below the base plate of foundation pit bottom surface 2m, and decompression is with subtracting the more original bottom of foundation ditch of infiltration layer
Layer permeability is significantly reduced.
The infiltration coefficient that the decompression subtracts infiltration layer is the 1%~2% of the bottom of foundation ditch original stratum osmotic coefficient, the decompression
Subtract alloying layer thickness as 5~6 meters, achieve the effect that reduce groundwater pressure and reduce water percolating capacity.
Gully is provided in the foundation pit, the underground water penetrated into convenient for that will subtract infiltration layer by decompression in foundation pit discharges foundation pit
Outside.
Compared with prior art, the advantageous effect of present invention is that：Method using the present invention, more traditional full row
The deep basal pit Groundwater Control method of formula, the water of the required underground water for excluding foundation pit substantially reduce, the time of drainage of foundation pit
It can be significantly reduced with expense, while the groundwater level fluctuation very little on foundation pit outside stratum, to produced by the environment on foundation pit periphery
Influence very little.More traditional deep basal pit Groundwater Control method blocked entirely, decompression of the invention, which subtracts infiltration layer, directly to be set
It puts below base plate of foundation pit, and traditional horizontal water barrier need to be arranged on the depth of more than 15m under base plate of foundation pit, set depth
Significantly reduce so that the difficulty of construction that decompression subtracts infiltration layer is substantially reduced, project cost is significantly reduced, and construction quality also obtains
It is effectively ensured.
Description of the drawings
Fig. 1 is structure diagram of the embodiment of the present invention；
Wherein, 1-earth's surface, 2-level of ground water, 3-foundation pit enclosure structure（Vertical water-stop curtain）, 4-base plate of foundation pit, 5-base
Hole, 6-decompression subtract infiltration layer, 7-bottom of foundation ditch water barrier.
Specific embodiment
As shown in Figure 1, the embodiment of the present invention includes foundation pit 5,5 surrounding of foundation pit is provided with building enclosure 3；The building enclosure
5 bottom of foundation pit in 3 is equipped with base plate of foundation pit 4；Decompression, which is provided with, in the building enclosure 3 of 4 lower section of base plate of foundation pit subtracts infiltration layer 6.
It is water barrier 7 that decompression, which subtracts 6 lower section of infiltration layer,.
According to the specific location of highly permeable stratum deep basal pit, underground continuous wall-enclosure structure is applied in foundation pit surrounding first,
The building enclosure also serves as the vertical water-stop curtain of foundation pit, it is desirable that it cannot generate percolating water, and the depth of diaphram wall is according to base
What hole was excavated completely determines, and requirement reaches decompression and subtracts 1m below infiltration layer bottom plate.
From foundation pit earth's surface sleeve valve barrel grouting is used to carry out the construction that decompression subtracts infiltration layer, decompression subtracts infiltration layer and is located at base plate of foundation pit bottom
Below face 2m, decompression subtract infiltration layer infiltration coefficient is about bottom of foundation ditch original stratum osmotic coefficient 1%~2%, and underground is reduced to reach
Water pressure and the effect for reducing water percolating capacity, decompression subtract alloying layer thickness as 5~6 meters, and intensity is 5 ~ 8MPa.
After the completion of bottom of foundation ditch decompression subtracts infiltration layer construction, the excavation construction of deep basal pit is carried out.During excavation
Gully inside foundation pit need to be set, infiltration layer will be subtracted by decompression and penetrated into outside the underground water discharge foundation pit in foundation pit.
The present invention subtracts certain permeability that infiltration layer has using the decompression of bottom of foundation ditch, and part underground water is allowed to pass through drop
Pressure subtracts infiltration layer and penetrates into foundation pit, to achieve the purpose that reduce the water pressure for acting on decompression and subtracting infiltration layer bottom, so as to ensure foundation pit bottom
Portion is depressured the stability for subtracting infiltration layer and base plate of foundation pit；Simultaneously using the hypotonicity for subtracting infiltration layer and possessing is depressured, reduction passes through
Decompression subtracts infiltration layer and enters underground water inside foundation pit, is oozed with having the function that subtract, so as to significantly reduce drainage of foundation pit difficulty and row
Water rate is used, and ensures the safety of buildings around foundation pit.
Claims (10)
1. a kind of subtract the highly permeable stratum deep basal pit Groundwater Control method oozed based on decompression, which is characterized in that in highly permeable
When excavation is carried out under the conditions of layer, being set in bottom of foundation ditch has some strength simultaneously can part is permeable, infiltration coefficient
Subtract infiltration layer for the decompression of bottom of foundation ditch original stratum osmotic coefficient 1%~2% underground water is controlled, part underground water is allowed to lead to
It crosses decompression and subtracts infiltration layer infiltration foundation pit, reduce and act on the water pressure that bottom of foundation ditch decompression subtracts infiltration layer.
2. according to claim 1 subtract the highly permeable stratum deep basal pit Groundwater Control method oozed, feature based on decompression
It is, the decompression subtracts infiltration layer and is arranged at below the 2m of base plate of foundation pit bottom surface, and thickness is 5~6 meters, and intensity is 5 ~ 8MPa.
3. according to claim 1 subtract the highly permeable stratum deep basal pit Groundwater Control method oozed, feature based on decompression
It is, the decompression is subtracted infiltration layer and constructed using sleeve valve barrel grouting, carries out being depressured to subtract oozing from earth's surface first before excavation of foundation pit
The construction of layer, then carries out excavation of foundation pit.
4. according to claim 1 subtract the highly permeable stratum deep basal pit Groundwater Control method oozed, feature based on decompression
It is：Foundation pit surrounding sets fluid-tight vertical water-stop curtain, i.e. diaphram wall, the vertical water-stop curtain depth reaches drop
Pressure subtracts below the 1m of infiltration layer bottom, to prevent underground water from entering foundation pit from foundation pit surrounding.
5. according to claim 3 subtract the highly permeable stratum deep basal pit Groundwater Control method oozed, feature based on decompression
It is, gully is set inside foundation pit during excavation, penetrates into the underground in foundation pit by infiltration layer is subtracted by decompression
Outside water discharge foundation pit.
6. a kind of subtract the highly permeable stratum deep basal pit Groundwater Control structure oozed based on decompression, which is characterized in that foundation pit（5）Surrounding
It is provided with building enclosure（3）；The building enclosure（3）Interior foundation pit（5）Bottom is equipped with base plate of foundation pit（4）；The base plate of foundation pit
（4）The building enclosure of lower section（3）It is inside provided with decompression and subtracts infiltration layer（6）.
7. according to claim 5 subtract the highly permeable stratum deep basal pit Groundwater Control structure oozed, feature based on decompression
It is, the decompression subtracts infiltration layer（6）It is arranged at the base plate of foundation pit（4）Below bottom surface 2m.
8. according to claim 5 subtract the highly permeable stratum deep basal pit Groundwater Control structure oozed, feature based on decompression
It is, the decompression subtracts infiltration layer（6）Infiltration coefficient be the foundation pit（5）The 1%~2% of bottom original stratum osmotic coefficient.
9. according to claim 5 subtract the highly permeable stratum deep basal pit Groundwater Control structure oozed, feature based on decompression
It is, the decompression subtracts infiltration layer（6）Thickness is 5~6 meters.
10. according to claim 5 subtract the highly permeable stratum deep basal pit Groundwater Control structure oozed, feature based on decompression
It is, the decompression subtracts infiltration layer（6）Bottom surface and the building enclosure（3）The distance between bottom is more than 1m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810018557.6A CN108104144A (en) | 2018-01-09 | 2018-01-09 | Subtract the highly permeable stratum deep basal pit Groundwater Control method and structure oozed based on decompression |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810018557.6A CN108104144A (en) | 2018-01-09 | 2018-01-09 | Subtract the highly permeable stratum deep basal pit Groundwater Control method and structure oozed based on decompression |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108104144A true CN108104144A (en) | 2018-06-01 |
Family
ID=62218748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810018557.6A Pending CN108104144A (en) | 2018-01-09 | 2018-01-09 | Subtract the highly permeable stratum deep basal pit Groundwater Control method and structure oozed based on decompression |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108104144A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020098727A1 (en) * | 2018-11-16 | 2020-05-22 | 卫振海 | Method for constructing underground fresh water collection facility on coral island and reef |
| CN111691442A (en) * | 2019-03-15 | 2020-09-22 | 包尔特殊基础工程有限公司 | Foundation pit surrounding structure in foundation and manufacturing method thereof |
| CN113293773A (en) * | 2021-06-30 | 2021-08-24 | 中铁二十三局集团第二工程有限公司 | Foundation pit supporting system and construction method thereof |
| CN114703921A (en) * | 2020-09-11 | 2022-07-05 | 北京住总集团有限责任公司 | Construction method for preventing surge based on temporary bottom sealing structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680029A (en) * | 2012-05-17 | 2012-09-19 | 中南大学 | Calculation method for displacement and displacement time in dynamic precipitation process of pressure-bearing partially penetrating well or well group |
| CN102926392A (en) * | 2012-10-15 | 2013-02-13 | 中国建筑第六工程局有限公司 | Foundation pit dewatering system and construction method thereof |
| CN103122635A (en) * | 2013-01-30 | 2013-05-29 | 上海市政工程设计研究总院（集团）有限公司 | Foundation pit confined water resistant system and uprush stability judging method thereof |
| CN105569062A (en) * | 2015-12-11 | 2016-05-11 | 武汉广益交通科技股份有限公司 | Dewatering method implemented through permeation, weakening and emission reduction |
| JP2016084585A (en) * | 2014-10-23 | 2016-05-19 | 前田建設工業株式会社 | Pneumatic caisson method |
| CN211312564U (en) * | 2018-01-09 | 2020-08-21 | 中南大学 | Strong permeable stratum deep foundation pit underground water control structure based on depressurization and permeability reduction |
-
2018
- 2018-01-09 CN CN201810018557.6A patent/CN108104144A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680029A (en) * | 2012-05-17 | 2012-09-19 | 中南大学 | Calculation method for displacement and displacement time in dynamic precipitation process of pressure-bearing partially penetrating well or well group |
| CN102926392A (en) * | 2012-10-15 | 2013-02-13 | 中国建筑第六工程局有限公司 | Foundation pit dewatering system and construction method thereof |
| CN103122635A (en) * | 2013-01-30 | 2013-05-29 | 上海市政工程设计研究总院（集团）有限公司 | Foundation pit confined water resistant system and uprush stability judging method thereof |
| JP2016084585A (en) * | 2014-10-23 | 2016-05-19 | 前田建設工業株式会社 | Pneumatic caisson method |
| CN105569062A (en) * | 2015-12-11 | 2016-05-11 | 武汉广益交通科技股份有限公司 | Dewatering method implemented through permeation, weakening and emission reduction |
| CN211312564U (en) * | 2018-01-09 | 2020-08-21 | 中南大学 | Strong permeable stratum deep foundation pit underground water control structure based on depressurization and permeability reduction |
Non-Patent Citations (3)
| Title |
|---|
| 崔永高: "桩基后压浆对深基坑降水渗流场的影响", 《工程地质学报》 * |
| 范士凯: "《土体工程地质宏观控制论的理论与实践》", 31 May 2017, 武汉市福缘印刷厂 * |
| 陆马兰: "高拱坝深基坑渗流控制措施及分析", 《长江科学院院报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020098727A1 (en) * | 2018-11-16 | 2020-05-22 | 卫振海 | Method for constructing underground fresh water collection facility on coral island and reef |
| CN111691442A (en) * | 2019-03-15 | 2020-09-22 | 包尔特殊基础工程有限公司 | Foundation pit surrounding structure in foundation and manufacturing method thereof |
| CN114703921A (en) * | 2020-09-11 | 2022-07-05 | 北京住总集团有限责任公司 | Construction method for preventing surge based on temporary bottom sealing structure |
| CN114703921B (en) * | 2020-09-11 | 2024-05-28 | 北京住总集团有限责任公司 | Construction method for preventing surging based on temporary back cover structure |
| CN113293773A (en) * | 2021-06-30 | 2021-08-24 | 中铁二十三局集团第二工程有限公司 | Foundation pit supporting system and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10550537B2 (en) | Self-drainage anchor cable system for slope protection and construction method thereof | |
| CN108104144A (en) | Subtract the highly permeable stratum deep basal pit Groundwater Control method and structure oozed based on decompression | |
| CN104404974B (en) | The thick sand-pebble layer deep basal pit of high artesian slip casting back cover structure and construction technology thereof | |
| CN105002913A (en) | Strongly-permeable stratum deep foundation pit bottom sealing water stopping structure and construction method thereof | |
| CN102787607B (en) | A kind of deep foundation pit precipitation construction method for supporting being applicable to coastal area | |
| CN105544622B (en) | A kind of anti-floating system and its checking device of underground structure | |
| CN108979659A (en) | The ruggedized construction and method of structures are worn under weak soil rich water large cross-section tunnel group | |
| CN107023026A (en) | A kind of sealing bottom type caisson wall and construction method | |
| CN102051885A (en) | Process for absorbing and discharging water under deep foundation concrete | |
| CN105926682A (en) | Basement baseplate post-cast strip construction method with pressure bearing water and higher water pressure | |
| CN103572764A (en) | Ultra-deep manual hole digging pile dado water stop structure and construction method thereof | |
| CN212001207U (en) | Foundation ditch stagnant water precipitation's structure | |
| CN203939036U (en) | A kind of steel sheet pile cofferdam structure that is applicable to river course | |
| CN108867673A (en) | A kind of underwater prevention method in the foundation pit based on the curtain that draws water | |
| CN201424658Y (en) | Water leakage detection of underground continuous wall groove seams and block repair device | |
| CN102787606B (en) | Guard method to surrounding environment in a kind of excavation of foundation pit Precipitation Process | |
| CN107100206A (en) | A kind of prevention and controls of basement leakage | |
| CN211312564U (en) | Strong permeable stratum deep foundation pit underground water control structure based on depressurization and permeability reduction | |
| CN206800431U (en) | A kind of sealing bottom type caisson wall | |
| CN113882410A (en) | Deep foundation pit underground water treatment structure and method | |
| CN204252148U (en) | High artesian thick sand-pebble layer deep foundation ditch slip casting back cover structure | |
| CN111287205A (en) | Deep multi-stage dynamic foundation pit dewatering system and dewatering method thereof | |
| CN106836232A (en) | Deep basal pit pressure-bearing water seal drainage construction technique | |
| CN216615927U (en) | Emergency structure system applied to single-row enclosure of foundation pit | |
| CN213448534U (en) | Sealing and lowering combined pressure-bearing water control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180601 |
|
| RJ01 | Rejection of invention patent application after publication |