CN105544622A - Floating resisting device, and seepage insulation device and drainage path checking device thereof for underground building - Google Patents

Floating resisting device, and seepage insulation device and drainage path checking device thereof for underground building Download PDF

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Publication number
CN105544622A
CN105544622A CN201610087685.7A CN201610087685A CN105544622A CN 105544622 A CN105544622 A CN 105544622A CN 201610087685 A CN201610087685 A CN 201610087685A CN 105544622 A CN105544622 A CN 105544622A
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underground
infiltration layer
underground building
building
flexibility
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CN201610087685.7A
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CN105544622B (en
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龚展宇
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龚展宇
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/10Protective 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
    • E02D31/12Protective 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
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/02Protective 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 ground humidity or ground water
    • E02D31/025Draining membranes, sheets or fabric specially adapted therefor, e.g. with dimples

Abstract

The invention discloses a floating resisting device for an underground building. Through combined application of a seepage insulation device, a drainage device and a drainage path checking device, groundwater buoyance borne by the underground building is effectively reduced, so that the purpose of preventing the underground building from floating is reliably achieved. The floating resisting device adopts the specific structure that a horizontal seepage insulation layer (3) is built at the upper part of a foundation pit back fill region between the external wall (6) of the underground building and the foundation pit border (4) of the underground building; a permeable soil layer (1) is built at the lower part of the foundation pit back fill region; at least two parallel multi-hole water collecting pipes or water collectors (17 and 18) which do not mutually and directly communicate are paved in the permeable soil layer (1) and respectively communicate with one or more water outlets (2). After the measures are adopted, the water level for prevention of up-floating of the underground building is determined by the elevations of at least two water outlets (2) of which the elevations are the same. The invention also discloses an underground water seepage insulation device for the underground building, and an underground water drainage path checking device for the underground building.

Description

A kind of anti-floating system of underground structure and every oozing device, drainage channel checking device
Technical field
The present invention relates to a kind of anti-floating system of underground structure, the invention still further relates to a kind of underground water of underground structure every oozing device, a kind of ground water drainage path checking device.
Background technology
In order to avoid buoyancy force of underground water causes underground structure to float, prior art have employed all kinds of measure of anti float: a. arranges uplift pile, relies on the buoyancy of uplift resistance counteracting suffered by underground structure of uplift pile; B. ballast is set, relies on the buoyancy suffered by counteract gravity forces underground structure of ballast; C. apparatus for draining subsurface water is set, reduces groundwater level by discharging underground water, thus reduce the buoyancy suffered by underground structure.These three kinds of measures respectively have deficiency: the engineering cost of the measure of a class and the measure of b. class is higher, and economy is poor; The a class measure construction period is longer; The measure of c class needs a large amount of pump drainage underground water during use, and maintenance cost is higher; Part measure in the measure of c class needs to bore the thorough pump drainage underground water of many holes guarantee at exterior wall and base plate, therefore has certain influence to underground building using function; C class measure drainage channel is having the risk of alluvial blocking over the long term.
With foundation ditch border, underground building (4) surrounding soil layer, the geological environment of impervious stratum (8) is below for underground building base plate (5), the source of underground water is mainly the downward seepage flow of surface soil layer backwater in pit backfill region, underground building, without other underground water such as diving, artesian waters within the scope of the foundation ditch of described underground building.For this kind of geological environment, there is technical measures suggestion to adopt the measure of d class: to adopt cohesive soil or dirt to the backfill in pit backfill region and layered rolling or to ram densification real, attempt measure whereby and eliminate buoyancy suffered by underground structure.But be affected by human factors comparatively large owing to " rolling or ramming pressure " in work progress, construction quality is difficult to guarantee reliable and stable, so this measure is difficult to make us relieved.
In hydraulic engineering and port works, the various composite geo-membrane of extensive use is as vertical seepage control material, fine every oozing effect, and using every oozing field of underground structure underground water introduced by this kind of material by the present invention; In patent document [application number 201420655634.6] (hereinafter referred to as document 1), disclose the dewatering installation of a kind of underground structure underground water, the anti-floating field that the present invention is introduced into underground structure uses.
Summary of the invention
The geological environment of impervious stratum (8) is with foundation ditch border, underground building (4) surrounding soil layer below for underground building base plate (5), the invention provides a kind of simple and reliable anti-floating of underground building method: by Combination application every oozing device and dewatering installation, buoyancy force of underground water suffered by effective reduction underground structure, thus reach the object reliably preventing underground structure from floating.
Technical scheme of the present invention: the bottom, pit backfill region between underground building exterior wall (6) and foundation ditch border, underground building (4) is constructed a permeable ground (1) and is communicated with the identical delivery port (2) of at least two absolute altitudes, and described permeable ground (1) is full of whole pit backfill region in the horizontal direction; Construct a level every infiltration layer (3) at pit backfill area top, describedly cover whole pit backfill region every infiltration layer (3), see Fig. 1, Fig. 2; After taking above-mentioned measure, the anti-uplift ground water level of described underground structure is determined by the absolute altitude of described at least two delivery ports (2).
Describedly to select by one of following devices every infiltration layer (3): the flexibility adopting composite geo-membrane to form every infiltration layer (3) described in a., successional every oozing material; B. described every infiltration layer (3) employing earth material mixing impermeable material, earth material mixing impermeable material at least comprises cohesive soil, dirt or cement-soil, and layered rolling or rammer densification are in fact; C. describedly earth material mixing impermeable material and the flexibility be made up of composite geo-membrane, successional every oozing material is adopted every infiltration layer (3) superposition.Describedly form gradient every infiltration layer (3), near one end, underground structure (9) absolute altitude higher than away from one end, underground structure (10) absolute altitude.
The described flexibility, successional in time oozing material adopting composite geo-membrane to form every infiltration layer (3), described flexibility is every infiltration layer (3) and the equal tight seal of underground structure exterior wall (6) or underground building top board (7) junction, and described flexibility extends to beyond foundation ditch border, underground building (4) every infiltration layer (3) and is connected tight seal with impervious stratum (8); When there being underground pipeline to pass through described flexibility when infiltration layer (3), described flexibility is connected tight seal every infiltration layer (3) with underground pipeline external surface.As the further in-depth of flexibility every infiltration layer (3) connection scheme, described flexibility adopts one of following two kinds of modes every infiltration layer (3) near one end, underground structure (9) and the connection of underground structure: a. arranges two projections (15) at underground building exterior wall (6), described flexibility rises to the below of the upper bar of exterior wall projection (15) along underground building exterior wall (6) near one end, underground structure (9) every infiltration layer (3), outside it, build brick wall or concreting (16) press seal again by laying bricks or stones, see Fig. 3; B. described flexibility is adjacent to every the close one end, underground structure (9) of infiltration layer (3) and underground building top board (7) and uses and compresses weight (14) press seal, sees Fig. 4.Described flexibility adopts following manner every infiltration layer (3) away from the connection of the impervious stratum (8) beyond one end, underground structure (10) and underground building foundation ditch: described flexibility is within infiltration layer (3) to insert the impervious stratum (8) beyond the foundation ditch of underground building away from one end, underground structure (10) and press closely closed.
The content of described permeable ground (1), delivery port (2) referenced patent document [document 1] is selected: described permeable ground (1) at least comprises fine sand, medium sand, coarse sand, gravelly sand, dust, circle gravel, rubble or cobble; Described delivery port (2) leads to indoor, underground building lower ground face, mine pit or pipe trench through underground building exterior wall (6).
Always unobstructed in order to ensure the ground water drainage path between described permeable ground (1) to delivery port (2), be provided with ground water drainage path checking device: the porous header that laying at least two is parallel in described permeable ground (1) or water collector (17,18); Directly be not communicated with mutually between described two headers or water collector (17,18), the current in two headers or water collector (17,18) can only circulate alternately by the hole of the permeable ground (1) between two headers or water collector (17,18); Described every root header or water collector (17,18) are communicated with at least one delivery port (2) separately, see Fig. 5.A delivery port (2) water filling wherein, observe another delivery port (2) whether draining, whether the ground water drainage path just can checked at any time between described permeable ground (1) to delivery port (2) is unobstructed.In order to prevent mud, the sand inlet opening of depositing in header or water collector (17,18), every root header or the coated at least one deck of water collector (17,18) external surface filter mud, husky filter cloth or filter membrane.
The beneficial effect that the present invention has:
Be used alone compared with the measure of d class, the present invention, by adopting permeable ground (1), delivery port (2), aggregate measures every infiltration layer (3), guarantees that anti-floating of underground building is safe and reliable: can guarantee to reduce even preventing earth's surface from permeating the ground within building foundation pit every infiltration layer (3); Can Timeliness coverage defect adopting remedial measures by the water yield observing delivery port (2), guarantee workmanship; Even if occur that any accident causes infiltration to permeate the ground within building foundation pit, the underground water infiltrated can also be discharged by permeable ground (1) and delivery port (2) in time, prevent groundwater level in the foundation ditch of underground building from rising to more than anti-uplift ground water level, guarantee underground structure safety.
Compare with the measure of b class with the measure of a class, anti-floating system of the present invention can reduce uplift pile or ballast, and engineering cost is lower.Be used alone compared with the measure of c class, the present invention is by arranging every infiltration layer (3) and checking its sealing performance that earth's surface substantially can be stoped to permeate the ground within building foundation pit, and only need a small amount of pump drainage underground water during use, maintenance cost is lower; Under extreme case, can prevent earth's surface from permeating the ground within building foundation pit completely every infiltration layer (3), substantially do not need pump drainage underground water, maintenance cost is extremely low; Because delivery port (2) quantity needed is few, only need arrange a small amount of wall-through hole in exterior wall (6), underground building uses substantially unaffected.
Compared with rigidity impermeable material or earth material mixing impermeable material, composite geo-membrane of the present invention is every oozing the better every oozing effect of device.This is because: rigidity impermeable material piece difficulty, even if the flexible sealing material of edge joint position pointing is also difficult to ensure that all pieces are tight, therefore do not recommend to adopt; The selection of earth material mixing impermeable material and working procedure are affected by human factors comparatively large, and construction quality is difficult to guarantee reliable and stable; Composite geo-membrane is widely used in hydraulic engineering and port works as vertical seepage control material, and technique is ripe, is diverted to the level of underground building foundation ditch as backfill every oozing material, effective equally every oozing effect.
Whether the ground water drainage path that ground water drainage path checking device of the present invention can be checked between described permeable ground (1) to delivery port (2) is at any time unobstructed, prevents alluvial blocking from causing potential safety hazard.
Accompanying drawing explanation
Fig. 1 is that underground structure top elevation is above the ground level the underground building pit backfill zone profile figure of absolute altitude
Fig. 2 is the underground building pit backfill zone profile figure of underground structure top elevation lower than ground level
Fig. 3 is that flexibility is connected detail drawing every infiltration layer with underground structure exterior wall
Fig. 4 is that flexibility is connected detail drawing every infiltration layer with underground structure top board
Fig. 5 is parallel set water pipe or water collector and delivery port position relationship floor map
In figure: 1--permeable ground; 2--delivery port; 3--is every infiltration layer; Foundation ditch border, 4--underground building; 5--underground building base plate; 6--underground building exterior wall; 7--underground building top board; Impervious stratum beyond the foundation ditch of 8--underground building; 9-near underground structure every infiltration layer one end; 10--away from underground structure every infiltration layer one end; 11--foundation ditch bottom backfill; 12-foundation ditch top backfill; 13-earth's surface backfill; 14--compresses weight; 15--underground building exterior wall projection; The outer brick-on-edge wall of 16-or concrete block; 17,18-parallel set water pipe or water collector
Detailed description of the invention
Embodiment 1
Two layers of basement buried depth 10m of certain building, local is without above-ground structures, and more than basement roof have the thick earthing of 1m, around the foundation ditch of underground building, soil layer is argillic horizon.In order to prevent basement floating-up, comparing the anti-floating system of invention and beating anti-floating pile two kinds of schemes: according to a conventional method, using elevation of levelled ground as basement anti-uplift ground water level, must anti-floating pile be beaten; Adopt the anti-floating system of invention, using the absolute altitude of delivery port (2) as basement anti-uplift ground water level, local basement would not float.Compare later decided to adopt the patented invention of anti-floating device, specific measures are: the underground building external wall (6) at the bottom of the distance of 2.0 m reserved outlet (2) wall bushing;Backfill soil foundation pit construction in the following order: from bottom to top with lower ground excavation of earthwork backfill soil layer (11) to close to the outlet pipe (2) level - with the coarse sand backfill middle permeable soil layer (1) and distributed to all foundation pit backfilling area, during this period in the middle of the permeable soil (1) placed around underground structures of a pair of parallel porous pipes (17, 18), and their respective respectively connected to the outlet (2) catheter - with upper site excavation of earthwork backfill soil layer (12) to the elevation of impervious layer (3) - all soil layers in the process of backfill compaction - flexible impervious layer (3) the foundation pit backfilling area and extended to cover all the underground construction of foundation pit impervious soil outside boundary (4) (8) (see figure 2) - flexible impervious layer (10) at one end inserted into the underground buildings outside the foundation pit impervious soil layer (8) and press tightly solid closed - flexible impervious layer (9) and the other end of the underground building roof (7) against with heavy pressure (14) pressure tight seal (see figure 4) - backfill in the topsoil (13) and complete all kinds of pipe installation.
Between the operating period of underground building, observe delivery port (2) and there are flowing out, but the water yield is very little, formation is dripped.Building subsidence observation has no obvious distortion, and the component such as structural beams, post is working properly, has no crack, proves that using the absolute altitude of delivery port (2) as basement anti-uplift ground water level be safe and reliable.
Embodiment 2
Two layers of basement buried depth 10m of certain building, local above-ground structures only has one deck, and basement roof is higher than outdoor ground, and around the foundation ditch of underground building, soil layer is argillic horizon, adopts the device anti-floating of invention.Due to narrow space, underground building foundation ditch short of width 1m, be difficult to ensure backfill construction quality, decision selects composite geo-membrane as every infiltration layer (3), to guarantee that, every oozing effect, concrete implementing method is: reserve the mouth of a river (2) wall conduit and exterior wall projection (15) at underground building exterior wall (6); pit backfill soil is constructed from bottom to top in the following order: backfilling of earthwork bottom soil layer (11) be excavated with place is to the absolute altitude close to delivery port (2) conduit---and backfill middle permeable ground (1) with medium coarse sand and be distributed to whole pit backfill region, the pair of parallel porous header ((17 around underground building is placed during this period in the middle of permeable ground (1), 18) and lead to delivery port (2) conduit separately---the backfilling of earthwork upper soil horizon (12) be excavated with place is to every infiltration layer (3) absolute altitude---lay and cover whole pit backfill region every infiltration layer (3) and extend to impervious stratum (8) (see the Fig. 1) beyond foundation ditch border, underground building (4)---within the impervious stratum (8) that infiltration layer one end (10) insert beyond the foundation ditch of underground building and press closely---rises to the below of the upper bar of exterior wall projection (15) every the infiltration layer other end (9) along underground building exterior wall (6), brick wall (16) press seal (see Fig. 3) is built again by laying bricks or stones outside it---backfill surface soil layer (13) also completes various pipes installation, all sealing performance inspection is carried out every all sealing positions of infiltration layer (3).
Between the operating period of underground building, observe delivery port (2) substantially anhydrous outflow, to have season at heavy rain once in a while and drip on a small quantity, display composite geo-membrane is every oozing the fine every oozing effect of device.

Claims (10)

1. the anti-floating system of a underground structure, underground structure comprises underground building exterior wall (6), underground building base plate (5), underground building top board (7), region between underground building exterior wall (6) and foundation ditch border, underground building (4) is pit backfill region, underground building base plate (5) below with foundation ditch border, underground building (4) beyond soil layer be impervious stratum (8); It is characterized in that: construct a level every infiltration layer (3) at pit backfill area top, describedly cover whole pit backfill region every infiltration layer (3); Construct a permeable ground (1) in bottom, pit backfill region and be communicated with the identical delivery port (2) of at least two absolute altitudes, described permeable ground (1) is full of whole pit backfill region in the horizontal direction.
2. the anti-floating system of a kind of underground structure according to claim 1, is characterized in that: describedly select by one of following devices every infiltration layer (3): adopt the flexibility, successional every oozing material be made up of composite geo-membrane described in a. every infiltration layer (3); B. described every infiltration layer (3) employing earth material mixing impermeable material, earth material mixing impermeable material at least comprises cohesive soil, dirt or cement-soil; Earth material mixing impermeable material layered rolling or rammer densification are in fact; C. describedly earth material mixing impermeable material and the flexibility be made up of composite geo-membrane, successional every oozing material is adopted every infiltration layer (3) superposition.
3. the anti-floating system of a kind of underground structure according to claim 2, it is characterized in that: described flexibility is every infiltration layer (3) and the equal tight seal of underground structure exterior wall (6) or underground building top board (7) junction, and described flexibility extends to beyond foundation ditch border, underground building (4) every infiltration layer (3) and is connected tight seal with impervious stratum (8); When there being underground pipeline to pass through described flexibility when infiltration layer (3), described flexibility is connected tight seal every infiltration layer (3) with underground pipeline external surface.
4. the anti-floating system of a kind of underground structure according to claim 1, is characterized in that: described permeable ground (1) at least comprises fine sand, medium sand, gravelly sand, dust, circle gravel, rubble, cobble, block stone or erratic boulder; The delivery port (2) that described at least two absolute altitudes are identical leads to indoor, underground building lower ground face, mine pit or pipe trench through underground building exterior wall (6).
5. the anti-floating system of a kind of underground structure according to claim 1, is characterized in that: the porous header that laying at least two is parallel in described permeable ground (1) or water collector (17,18); Directly be not communicated with mutually between described two headers or water collector (17,18), the current in two headers or water collector (17,18) can only circulate alternately by the hole of the permeable ground (1) between two headers or water collector (17,18); Described every root header or water collector (17,18) are communicated with at least one delivery port (2) separately.
6. the anti-floating system of a kind of underground structure according to claim 5, is characterized in that: described every root header or the coated at least one deck of water collector (17,18) external surface filter mud, husky filter cloth or filter membrane.
7. the underground water of a underground structure is every oozing device, underground structure comprises underground building exterior wall (6), underground building base plate (5), underground building top board (7), region between underground building exterior wall (6) and foundation ditch border, underground building (4) is pit backfill region, underground building base plate (5) below with foundation ditch border, underground building (4) beyond soil layer be impervious stratum (8); It is characterized in that: construct a level every infiltration layer (3) at pit backfill area top, describedly cover whole pit backfill region every infiltration layer (3); Describedly adopt the flexibility, successional every oozing material be made up of composite geo-membrane every infiltration layer (3).
8. the underground water of a kind of underground structure according to claim 7 is every oozing device, it is characterized in that: described flexibility is every infiltration layer (3) and the equal tight seal of underground structure exterior wall (6) or underground building top board (7) junction; Described flexibility extends to beyond foundation ditch border, underground building (4) every infiltration layer (3) and is connected tight seal with impervious stratum (8); When there being underground pipeline to pass through described flexibility when infiltration layer (3), described flexibility is connected tight seal every infiltration layer (3) with underground pipeline external surface.
9. the underground water of a kind of underground structure according to claim 7 or 8 is every oozing device, it is characterized in that: described flexibility adopts one of following two kinds of modes every infiltration layer (3) near one end, underground structure (9) and the connection of underground structure: a. arranges two projections (15) at underground building exterior wall (6), described flexibility rises to the below of the upper bar of exterior wall projection (15) along underground building exterior wall (6) near one end, underground structure (9) every infiltration layer (3), then outside it, build brick wall or concreting (16) press seal by laying bricks or stones; B. described flexibility is adjacent to every the close one end, underground structure (9) of infiltration layer (3) and underground building top board (7) and uses and compresses weight (14) press seal;
Described flexibility adopts following manner every infiltration layer (3) away from the connection of the impervious stratum (8) beyond one end, underground structure (10) and underground building foundation ditch: described flexibility is within infiltration layer (3) to insert the impervious stratum (8) beyond the foundation ditch of underground building away from one end, underground structure (10) and press closely closed.
10. a ground water drainage path checking device for underground structure, is characterized in that: the porous header that laying at least two is parallel in underground water-permeable soil layer (1) or water collector (17,18); Directly be not communicated with mutually between described two headers or water collector (17,18), the current in two headers or water collector (17,18) can only circulate alternately by the hole of the permeable ground (1) between two headers or water collector (17,18); Described every root header or water collector (17,18) are communicated with at least one delivery port (2) separately.
CN201610087685.7A 2015-06-05 2016-02-15 A kind of anti-floating system and its checking device of underground structure Active CN105544622B (en)

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CN106760722A (en) * 2017-02-28 2017-05-31 南通华荣建设集团有限公司 Without pile foundation individual layer underground garage anti-floating construction method
CN108487331A (en) * 2018-03-21 2018-09-04 东北大学 A kind of underground structure anti-floating system integrating gallery draining and fertile slot antiseepage

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CN108625402A (en) * 2017-03-24 2018-10-09 中国二十冶集团有限公司 Foundation pit fertilizer slot ponding processing method

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JPH05287767A (en) * 1992-04-08 1993-11-02 Shimizu Corp Preventing method of lift of structure by ground water
CN103510528A (en) * 2012-06-29 2014-01-15 深圳市工勘岩土工程有限公司 Blind trench water discharging structure used for underground structure up-floating prevention
CN203729348U (en) * 2014-01-17 2014-07-23 长沙有色冶金设计研究院有限公司 Water storage structure anti-floating device
CN203834527U (en) * 2014-05-15 2014-09-17 中航天建设工程有限公司 Waterproof system for building foundation pit

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Publication number Priority date Publication date Assignee Title
JPH05287767A (en) * 1992-04-08 1993-11-02 Shimizu Corp Preventing method of lift of structure by ground water
CN103510528A (en) * 2012-06-29 2014-01-15 深圳市工勘岩土工程有限公司 Blind trench water discharging structure used for underground structure up-floating prevention
CN203729348U (en) * 2014-01-17 2014-07-23 长沙有色冶金设计研究院有限公司 Water storage structure anti-floating device
CN203834527U (en) * 2014-05-15 2014-09-17 中航天建设工程有限公司 Waterproof system for building foundation pit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106760722A (en) * 2017-02-28 2017-05-31 南通华荣建设集团有限公司 Without pile foundation individual layer underground garage anti-floating construction method
CN108487331A (en) * 2018-03-21 2018-09-04 东北大学 A kind of underground structure anti-floating system integrating gallery draining and fertile slot antiseepage

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