CN111691442A - Foundation pit surrounding structure in foundation and manufacturing method thereof - Google Patents
Foundation pit surrounding structure in foundation and manufacturing method thereof Download PDFInfo
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- CN111691442A CN111691442A CN202010174750.6A CN202010174750A CN111691442A CN 111691442 A CN111691442 A CN 111691442A CN 202010174750 A CN202010174750 A CN 202010174750A CN 111691442 A CN111691442 A CN 111691442A
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/16—Restraining of underground water by damming or interrupting the passage of underground water by placing or applying sealing substances
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention relates to a foundation pit surrounding structure in a foundation and a method for the production thereof, in particular to a method for the construction of a foundation pit surrounding structure in a foundation in which there is a ground water level, wherein an annular sealing wall is constructed in the foundation, which annular sealing wall extends from the surface of the foundation up to a preset depth below the ground water level, and a sealing bottom is constructed in a lower region below the ground water level within the annular sealing wall by injecting a sealing medium, wherein a sealing basin is formed in the foundation. According to the invention, the groundwater from the ground within the sealing basin is pumped up to a defined groundwater level of compression. The groundwater in the sealing basin is maintained at this level of compression for a preset period of time, wherein the sealing bottom is compressed in a targeted manner as a result of the groundwater pressure exerted from below. The groundwater level in the sealed basin is then raised to a final level, which is above the compressed level and below the groundwater level.
Description
Technical Field
The invention relates to a method for producing a foundation pit enclosure (Baugrubunmychlie beta ung) in a foundation in which a ground water level is present, wherein an annular sealing wall is built in the foundation, which extends from a foundation surface to a predetermined depth below the ground water level, and a sealing bottom (Dichtsohle) is built within the annular sealing wall in a lower region below the ground water level by injecting a sealing medium, wherein a sealing pot is formed in the foundation by the annular sealing wall and the sealing bottom.
Furthermore, the invention relates to a foundation pit surrounding structure according to the preamble of claim 12, wherein an annular sealing wall is built into the foundation, which annular sealing wall extends from the foundation surface up to a predetermined depth below the ground water level in the foundation, and a sealing bottom is built within the annular sealing wall in the lower region below the ground water level by injecting a sealing medium, wherein a sealing basin is formed in the foundation by the annular sealing wall and the sealing bottom.
Background
DE 19604525C 2 discloses a method for producing a foundation pit enclosure with an annular sealing wall and a sealing bottom below the ground water level. In the foundation pit surrounding structure, the sealing bottom is embodied as a rigid bottom plate which is grouted anchored (gun-veranker) in the deeper lying ground bed via grouting anchoring elements. Such a rigid bottom plate is time-consuming and cost-consuming to produce.
A method of this type for producing a foundation pit surrounding structure is known from EP 2787123B 1. In order to construct the foundation pit surrounding structure, a sealing bottom is produced within the annular sealing wall by injecting a sealing medium into the porous ground substrate, wherein the sealing medium forms a watertight, gel-like structure in the porous ground substrate. Thereby, a watertight ground layer and thus a sealed bottom is formed as a whole.
A similar method and a similar foundation pit surrounding structure are also known from DE 20114212U 1.
To achieve the desired tightness of the sealing bottom requires that a relatively large amount of sealing medium is injected into the porous ground layer. The higher the amount of injected sealing medium per square meter of sealing bottom, the better the sealing performance. However, increased consumption of sealing medium is associated with increased costs and time expenditure. Furthermore, it is desirable from an environmental point of view to inject as little sealing medium as possible into the deeper lying ground layer.
Disclosure of Invention
The invention is based on the object of specifying a method for constructing a foundation pit enclosure in a foundation and a foundation pit enclosure of this type, which allow a particularly tight foundation pit enclosure while using a sealing medium with high efficiency.
This object is achieved, on the one hand, by a method having the features of claim 1 and, on the other hand, by a pit-surrounding structure having the features of claim 12. Preferred embodiments of the invention are given in the dependent claims.
The method according to the invention is characterized in that groundwater from the foundation within the sealing basin is pumped up to a groundwater level of a defined compression level below the groundwater level and above the sealing bottom, the groundwater in the sealing basin is kept at said compression level for a preset period of time, which is at least 8 hours, wherein the sealing bottom is compressed in a targeted manner as a result of the groundwater pressure exerted from below, and then the groundwater level in the sealing basin is raised to a final level above the compression level and below the groundwater level.
The basic idea of the invention is to compress a sealing bottom, which is formed by injecting a soft sealing medium into a porous ground layer, in a targeted manner after the injection. Here, the compression is carried out from below by means of hydraulic pressure according to the invention. This is achieved in that, after the first blank-sealing bottom has been built, the water level in the sealing pot is lowered to a specific compression level which, in the case of a trench excavation, is below a predetermined final level of the water level in the sealing pot.
By this particularly strong lowering of the groundwater level inside the sealing basin to the preset compression level, a relatively high pressure difference between the upper side and the lower side is created at the first sealing bottom formed, where groundwater is applied. This applied groundwater pressure leads to a targeted compression of the sealing bottom, since the particles of the sealing medium, which in particular form a gel-like structure, are then also introduced into the smaller capillaries of the porous ground layer by the applied pressure. For the desired compression, a relatively high pressure difference is set for a preset period of at least 8 hours, which pressure difference can preferably be between 0.5 bar and 5 bar. In the case of said compression, the foundation material of the foundation pit 1 is not, in any case not completely, excavated, so that the sealing bottom is supported sufficiently from above against the water pressure exerted from below.
After the compression of the sealing bottom has been produced, the groundwater level in the sealing basin can be raised again from the compressed level to a higher final level which is desired and sufficient for the excavation of the foundation pit. This final level is preferably located below the bottom of the excavation to be excavated or at least at the same height as the bottom.
A preferred embodiment of the method according to the invention consists in that a foundation pit is excavated within the sealing pot, wherein the foundation material is excavated up to a defined foundation pit bottom which is above the final level of groundwater of the sealing pot. Thereby it is ensured that: no groundwater is accumulated in the bottom of the foundation pit.
According to a further development of the invention, particularly good compression is achieved in that the groundwater level is kept at the compression level for a period of time of between 8 hours and 48 hours, preferably between 12 hours and 24 hours. In this time period, a significant improvement of the tightness of the sealing bottom can be achieved, wherein the compressed sealing bottom has an improved tightness of up to 20% or more relative to the first original sealing bottom.
According to one method variant, a particularly uniform compression is achieved in that, in the sealing basin, the groundwater is lowered uniformly above the sealing bottom until the compression level is reached. Thereby, large local fluctuations in the tightness of the sealing bottom are avoided.
A particularly uniform lowering of the groundwater can be achieved in particular by constructing a plurality of wells distributed over the sealing bottom in order to lower the groundwater in the sealing basin, and pumping the groundwater out of the wells. The higher the number of wells per area unit within the sealed basin, the more evenly the groundwater within the sealed basin can be reduced to a level of compression. The wells can also be embodied with transverse channels or as horizontal drainage devices (horizontal drainage channels).
In this case, according to a development of the invention, it is particularly advantageous to pump groundwater with a variable pumping capacity over time. The pumping out can thereby be carried out first with a reduced pump power, which is gradually increased. After reaching the final level within the sealed tub, the pump is then preferably operated at a reduced, continuous pump power in order to maintain the adjusted final level of groundwater in the sealed tub. In this case, it is to be taken into account that the sealing pot is never completely sealed in practice, so that a certain inflow of groundwater into the sealing pot must be taken into account. The pump power is set in such a way that it corresponds approximately to the inflow of groundwater.
In this case, it is particularly advantageous to increase the pump output step by step until the desired final value is reached. The power delivered by each well in the first hour can thus be, for example, 1m3Can be 2m in the second hour3Can be 3m in the third hour3Etc. until reaching, for example, 10m per hour and per well3Is measured. According to the recognition of the invention, by this gradual lifting, a sluggish flow behavior between the groundwater and the holes in the ground layer is accelerated, wherein, at the same time, a direction towards the well is preventedFlow of the formations is interrupted (abris).
According to a further method variant of the invention, the pumping-out is preferably carried out differently at the individual wells. In this case, the pumping power of the individual pumps is adjusted differently at the individual wells, so that the groundwater level in the sealing basin drops as uniformly as possible approximately parallel to the sealing bottom, until the final level is reached.
In this case, it can be particularly advantageous to measure and check the groundwater level during and/or after the pumping-out. This can be determined by a corresponding measuring device at the well. The individual measuring devices can preferably be connected by wire or wirelessly to a central control unit, which is likewise connected by wire or wirelessly to the pumps at the individual wells. Depending on the measured values at the individual wells, the pumping power of the individual pumps can be adjusted via the control unit in order to achieve a desired lowering or maintenance of the groundwater level in the sealing basin.
In the case of sealing media, it is possible to use essentially every suitable liquid or soft sealing medium with which the porous ground substrate can migrate into the bottom of the seal. In this case, it is particularly preferred that the sealing medium is a sealing gel which contains silicate, water glass and/or silica sol (Kieselsol) as constituents. These components can form, in particular, a gel-like structure with constituents in the ground or in the ground water, by means of which capillary systems in the porous ground layer are largely sealed in a water-tight manner.
Furthermore, the particularly economical production of the foundation pit surrounding structure is achieved by the following method: the annular sealing wall is embodied as a bored pile wall or a continuous wall (Schlitzwand, sometimes referred to as a continuous wall). Here, the bored pile wall is realized by intersecting a large number of bored piles or overlapping each other. In continuous walls, a large number of continuous wall moldings which meet or intersect one another are built into the foundation by means of continuous wall cutters or continuous wall grippers, which continuous wall moldings then together form sealing or enclosing walls. The sealing wall can be constructed in substantially any other suitable mannerE.g. can be constructed as sheet pile walls or can be mixed by foundation methods, e.g. MIP®Or CSM®A method is used for construction.
The foundation pit surrounding structure according to the invention is characterized in that the sealing bottom is compressed in a targeted manner in that the groundwater from the foundation within the sealing basin is pumped up to a groundwater level of a defined compression level below the groundwater level and above the sealing bottom, and the groundwater in the sealing basin is kept at the compression level for a preset period of time of at least 8 hours before the groundwater level in the sealing basin is raised after the compression to a final level above the compression level.
The foundation pit surrounding structure is in particular produced by means of the method according to the invention described above. Here, the advantages described above can be achieved.
Drawings
The invention will be described in more detail hereinafter with the aid of preferred embodiments, which are schematically shown in the drawings. In the drawings:
fig. 1 shows a schematic cross-sectional view before the bottom is sealed by compression in the case of the foundation pit surrounding structure being built according to the method according to the invention;
FIG. 2 shows a view of the foundation pit enclosure according to FIG. 1 when the groundwater level drops to a contracted level;
fig. 3 shows a view of the foundation pit enclosure according to fig. 1 and 2, wherein the sealing bottom is compressed;
fig. 4 shows a view of the foundation pit enclosure according to fig. 1 to 3, wherein the groundwater level is raised to a final level; and
fig. 5 shows a view of the foundation pit surrounding structure according to fig. 1 to 4 after the excavation of the foundation pit.
Detailed Description
Fig. 1 to 5 show a process for producing a foundation pit surrounding structure 10 according to the invention in a foundation 5, wherein a ground water level 7 is present. Here, as illustrated in fig. 1, an annular sealing wall 12 is built in the foundation 5 in a manner known per se. The annular sealing wall 12 extends from the foundation surface 6 to a predetermined depth in the foundation 5. Inside the sealing wall 12, a first sealing bottom 14 with an elevated thickness is built by injecting a sealing medium into a suitable ground layer in the foundation 5. The sealing bottom 14 is tightly coupled to the inside of the enclosing sealing wall 12. The enclosing sealing wall 12 and the sealing bottom 14 thus form a sealing pot 20 in the foundation 5 in a manner known per se.
According to fig. 2, after the sealing tub 20 has been built, a plurality of wells 22 are drilled in the sealing tub 20, which are used to pump out groundwater contained in the sealing tub 20. For this purpose, a pump, not shown, is used, which pumps groundwater out of the foundation 5 and out of the sealing basin 20. By this pumping-out, which preferably takes place gradually with increasing pump power, the groundwater level inside the sealing basin 20 drops from the original groundwater level 7 to the desired compression level 30. The compression level 30 is below the original ground water level 7 and above the sealed bottom 14. The pumping out via the well 22 is carried out in particular in such a way that the groundwater level in the sealing basin 20 falls as uniformly as possible over the entire sealing bottom 14 and as parallel as possible thereto.
By lowering the groundwater level inside the sealing basin 20, a pressure difference is created at the sealing bottom 14 between the upper side and the lower side of the sealing bottom 14. At the underside of the sealing bottom 14, a higher groundwater pressure is exerted, which is caused by a higher groundwater level 7 with respect to the lowered compression level 30 in the sealing tub 20. The applied water pressure is schematically indicated in fig. 2 by arrows.
This applied water pressure causes compression of the injected sealing medium in the formation layer of the sealed bottom 14 over a period of time (said time being at least 8 hours). Thereby, the thickness of the sealing bottom 14 can be reduced, as clearly shown in fig. 3. This compression can be up to 10% or higher. The compression is caused in particular by the fact that, as a result of the increased applied pressure difference, the injected particles of the gel-like sealing medium are pressed together from below and also into the finer capillaries of the ground layer. This achieves a significant increase in the tightness of the sealing bottom 14.
Then, according to fig. 4, the groundwater level inside the sealing basin 20 can be raised again to the final level 32 by reducing the pumping power to the well 22. The final level 32 is here above the compressed level 30 and below the original ground water level 7.
After this final level 32 of groundwater level in the sealing tub 20 is reached, the foundation material within the sealing tub 20 can then be excavated in order to thereby form the desired foundation pit 26 with the foundation pit bottom 28. The foundation pit bottom 28 is here at the same height as the final level 32 of the groundwater level in the sealing basin 20 or (as shown in fig. 5) at a slightly higher height than this final level.
Overall, a foundation pit surrounding structure 10 according to the invention is realized by means of the invention, in which case a particularly sealed sealing bottom 14 is obtained. Overall, the amount of sealing medium to be used can be reduced by means of the invention and a sealing pot 20 with particularly good sealing properties can be constructed overall.
Claims (12)
1. Method for constructing a foundation pit surrounding structure (10) in a foundation (5) in which there is a ground water level (7), wherein,
building an annular sealing wall (12) in the foundation (5), extending from the foundation surface (6) up to a preset depth below the ground water level (7), and
constructing a sealing bottom (14) within the annular sealing wall (12) in a lower region below the ground water level (7) by injecting a sealing medium, wherein a sealing basin (20) is formed in the foundation (5) by the annular sealing wall (12) and the sealing bottom (14),
it is characterized in that the preparation method is characterized in that,
-pumping groundwater within the sealing basin (20) from the foundation (5) up to a groundwater level of a defined compression level (30) below the groundwater level (7) and above the sealing bottom (14),
-keeping groundwater in the sealing basin (20) at the compression level (30) for a preset period of time of at least 8 hours, wherein the sealing bottom (14) is compressed in a targeted manner as a result of groundwater pressure applied from below, and
-then raising the groundwater level in the sealing basin (20) to a final level (32) above the compressed level (30) and below the groundwater level (7).
2. Method according to claim 1, characterized in that a foundation pit (26) is excavated within the sealing basin (20), wherein foundation material is excavated up to a defined foundation pit bottom (28) which is above a final level (32) of groundwater in the sealing basin (20).
3. Method according to claim 1 or 2, characterized in that the period of time during which the groundwater level is kept at the level of compression (30) is between 8 and 48 hours, preferably between 12 and 24 hours.
4. A method according to any of claims 1-3, characterized in that in the sealing basin (20) the groundwater is lowered evenly over the sealing bottom (12) to reach the compression level (30).
5. Method according to any one of claims 1 to 4, characterized in that, in order to lower groundwater in the sealing basin (20), a plurality of wells (22) are built distributed over the sealing bottom (14) and groundwater is pumped out of the wells (22).
6. Method according to claim 5, characterized in that the pumping out of groundwater is performed with variable pumping out power over time.
7. Method according to claim 6, characterized in that the pump-out power is increased stepwise until a desired final value is reached.
8. The method according to any one of claims 5 to 7, wherein the pumping out is performed differently at each well (22).
9. A method according to any of claims 5-8, characterized in that the groundwater level is measured and checked during and/or after the pumping-out.
10. Method according to any one of claims 1 to 9, characterized in that the sealing medium is a sealing gel comprising silicate, water glass and/or silica sol as components.
11. Method according to any one of claims 1 to 10, characterized in that the annular sealing wall (12) is embodied as a bored pile wall or a continuous wall.
12. Foundation pit enclosure in a foundation, in particular manufactured according to one of claims 1 to 11, wherein an annular sealing wall (12) is built in the foundation (5), which extends from a foundation surface (6) up to a preset depth below a ground water level (7) in the foundation (5), and a sealing bottom (14) is built within the annular sealing wall (12) in a lower region below the ground water level (7) by injecting a sealing medium, wherein a sealing pot (20) is formed in the foundation (5) by means of the annular sealing wall (12) and the sealing bottom (14),
it is characterized in that the preparation method is characterized in that,
the sealing bottom (14) is compressed in a targeted manner in such a way that the groundwater from the foundation within the sealing basin (20) is pumped up to a groundwater level of a defined compression level (30) below the groundwater level (7) and above the sealing bottom (14), and the groundwater in the sealing basin (14) is kept on the compression level (39) for a preset period of time of at least 8 hours before the groundwater level in the sealing basin (20) is raised after the compression to a final level (32) above the compression level (30).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19163092.0 | 2019-03-15 | ||
| EP19163092.0A EP3708715B1 (en) | 2019-03-15 | 2019-03-15 | Method for the production of excavation enclosure in the ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111691442A true CN111691442A (en) | 2020-09-22 |
| CN111691442B CN111691442B (en) | 2023-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010174750.6A Active CN111691442B (en) | 2019-03-15 | 2020-03-13 | Foundation pit surrounding structure in foundation and manufacturing method thereof |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP3708715B1 (en) |
| CN (1) | CN111691442B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113529730A (en) * | 2021-07-28 | 2021-10-22 | 中建八局天津建设工程有限公司 | Construction method of foundation pit |
| CN114108639B (en) * | 2021-11-17 | 2023-06-20 | 上海市机械施工集团有限公司 | Construction method for foundation pit bottom sealing |
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| DE19522592C1 (en) * | 1995-06-19 | 1997-02-13 | Gierse Ferdinand Dipl Ing Dipl | Process for sealing an excavation pit against ground water |
| DE19604525A1 (en) * | 1996-02-08 | 1997-08-21 | Bauer Spezialtiefbau | High-pressure injection sealing bed for excavation |
| CN103225306A (en) * | 2013-03-26 | 2013-07-31 | 西安建筑科技大学 | Method of preventing foundation pit leakage during excavation of foundation pit close to water source |
| EP2787123A1 (en) * | 2013-04-03 | 2014-10-08 | Bauer Spezialtiefbau GmbH | Method for creating a sealing bed and sealing bed |
| CN104314082A (en) * | 2014-11-12 | 2015-01-28 | 云南建工集团有限公司 | Deep function pit supporting structure in karst geology condition and construction method thereof |
| CN104674827A (en) * | 2015-03-27 | 2015-06-03 | 济南轨道交通集团有限公司 | Novel totally-closed water stopping system for water-rich stratum foundation pit and construction method of novel totally-closed water stopping system |
| CN206815356U (en) * | 2017-04-28 | 2017-12-29 | 北京市勘察设计研究院有限公司 | Water control system is synthetically descended in multi-aquifer area drainage pressure-reducing, ejection for water plugging |
| CN108104144A (en) * | 2018-01-09 | 2018-06-01 | 中南大学 | Subtract the highly permeable stratum deep basal pit Groundwater Control method and structure oozed based on decompression |
| CN108625384A (en) * | 2018-05-16 | 2018-10-09 | 中交公局第二工程有限公司 | A kind of construction method of deep strong permeable layer base pit dewatering structure |
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| DE20114212U1 (en) | 2001-05-18 | 2001-11-08 | Bauer Spezialtiefbau Gmbh, 86529 Schrobenhausen | Sealing sole, construction pit enclosure and injection medium for manufacturing the sealing sole |
| DE10140300A1 (en) * | 2001-08-16 | 2003-02-27 | Zueblin Ag | Base construction of a foundation ditch in pressing ground water comprises a sealing base consisting of a natural water-impermeable layer or an artificial water-impermeable layer as the sealing component |
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2019
- 2019-03-15 EP EP19163092.0A patent/EP3708715B1/en active Active
-
2020
- 2020-03-13 CN CN202010174750.6A patent/CN111691442B/en active Active
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| DE19522592C1 (en) * | 1995-06-19 | 1997-02-13 | Gierse Ferdinand Dipl Ing Dipl | Process for sealing an excavation pit against ground water |
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| EP2787123A1 (en) * | 2013-04-03 | 2014-10-08 | Bauer Spezialtiefbau GmbH | Method for creating a sealing bed and sealing bed |
| CN104314082A (en) * | 2014-11-12 | 2015-01-28 | 云南建工集团有限公司 | Deep function pit supporting structure in karst geology condition and construction method thereof |
| CN104674827A (en) * | 2015-03-27 | 2015-06-03 | 济南轨道交通集团有限公司 | Novel totally-closed water stopping system for water-rich stratum foundation pit and construction method of novel totally-closed water stopping system |
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| CN108104144A (en) * | 2018-01-09 | 2018-06-01 | 中南大学 | Subtract the highly permeable stratum deep basal pit Groundwater Control method and structure oozed based on decompression |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3708715A1 (en) | 2020-09-16 |
| EP3708715B1 (en) | 2022-01-19 |
| CN111691442B (en) | 2023-01-03 |
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