CN108049393A - For the attached building enclosure construction technology in subway station under the conditions of rich water thick sand bed - Google Patents
For the attached building enclosure construction technology in subway station under the conditions of rich water thick sand bed Download PDFInfo
- Publication number
- CN108049393A CN108049393A CN201711221614.2A CN201711221614A CN108049393A CN 108049393 A CN108049393 A CN 108049393A CN 201711221614 A CN201711221614 A CN 201711221614A CN 108049393 A CN108049393 A CN 108049393A
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- Prior art keywords
- cage
- building enclosure
- conditions
- sand bed
- rich water
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- 238000010276 construction Methods 0.000 title claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000005516 engineering process Methods 0.000 title claims abstract description 22
- 239000004576 sand Substances 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 72
- 239000010959 steel Substances 0.000 claims abstract description 72
- 230000002787 reinforcement Effects 0.000 claims abstract description 55
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 23
- 210000003205 muscle Anatomy 0.000 claims abstract description 12
- 241000251468 Actinopterygii Species 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 4
- 241000282693 Cercopithecidae Species 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
-
- 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
-
- 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
- E02D19/185—Joints between sheets constituting the sealing aprons
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
- E02D5/182—Bulkheads or similar walls made solely of concrete in situ using formworks to separate sections
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (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)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a kind of attached building enclosure construction technologies in subway station under the conditions of rich water thick sand bed, it comprises the following steps：Surveying setting-out, construction of guide wall, trenching construction, fabrication of reinforcing cage, reinforcing bar cage hoisting, concreting, provided by the present invention for the attached building enclosure construction technology in subway station under the conditions of rich water thick sand bed, that is ground-connecting-wall entirety grooving technology+borehole filling pile cage of reinforcement, and the construction technology of the connector slot section sealing welded using fish mouth muscle with steel reinforcement cage and I-steel, make the building enclosure water proof effect under the conditions of rich water thick sand bed more preferable, reduce leak stopping cost, site operation is greatly facilitated, shortens the building enclosure construction period.
Description
Technical field
Technical field of construction is gone along with sb. to guard him the present invention relates to subway station, in particular to a kind of under the conditions of rich water thick sand bed
The attached building enclosure construction technology in subway station.
Background technology
The existing attached building enclosure of City Subway Station adds rotary churning pile water stopping construction method for common cast-in-situ bored pile,
It is taken using Spiral digging machine or percussive drill after levelling of the land, measure of pile position unwrapping wire and jumps storehouse method by root pore-forming, borehole cleaning, decentralization
Single pile steel reinforcement cage pours underwater concrete, and injection two-tube rotary churning pile in outside carries out sealing between bored concrete pile, rotary churning pile depth with
Bored concrete pile is the same as deep.
Separately there is a kind of existing building enclosure construction technology for diaphram wall, chute forming machine and percussive drill is used to combine
Grooving mode, standard groove width are 6.0m, and slot section connector I-steel is directly welded with rectangle steel reinforcement cage, single width ground-connecting-wall steel reinforcement cage weight
Amount is typically about 25~30t, and matching somebody with somebody truck crane using large caterpillar after borehole cleaning carries out reinforcing bar cage hoisting, decentralization, finally pours water
Lower concrete.
In above-mentioned existing construction method of enclosure structure, although though drilled pile is plus the construction letter of jet grouting pile construction technique
Just, but under rich water thick sand bed geological conditions construct it was verified that rotary churning pile water stopping effect is poor, percolating water is tight after excavation of foundation pit
Weight, leak stopping is costly, and delays the duration；On the other hand, though ground-connecting-wall construction work is better than rotary churning pile water stopping effect, built on periphery
It builds in the city narrow space that object stands in great numbers, ground-connecting-wall steel reinforcement cage volume is too big, can not often provide steel reinforcement cage processing site, and
City busiest section carries out large-scale reinforcement cage lifting, and security risk is high, according to the mode dispensed from external concentrated processing, then transports
It is defeated of high cost, and the transport of large-scale reinforcement cage understands serious threat to traffic safety, therefore a kind of technical flow design of design is reasonable,
The better construction method of enclosure structure of foundation pit water-stagnating effect is various equivalent modifications urgent problem.
The content of the invention
In order to solve the above technical problems, technical solution provided by the invention is：For the subway under the conditions of rich water thick sand bed
The attached building enclosure construction technology in station, it comprises the following steps：
(1) surveying setting-out：It is taken multiple measurements according to the traverse point of construction requirement and elevation, after accurate, by four etc.
Control point is encrypted in conducting wire code requirement, and measuring goes out the ground center line that wall is led in underground, while the center line setting-out of circuit
Out, checking the correctness for the center line for leading wall.
(2) construction of guide wall：It according to the measurement result of step (1), is excavated along center line both sides, constructs and lead wall, using to drawing
Screw rod is as the support construction for leading wall, using flitch as the support construction between leading wall.
(3) trenching construction：The technique that ground-connecting-wall entirety grooving is taken with chute forming machine or impact drill, a phase slot of constructing, standard
Combination is grabbed in the wide 5.5m of slot section, punching.
(4) fabrication of reinforcing cage：Borehole filling pile cage of reinforcement is used in the phase slot constructed in step (3)；
(5) reinforcing bar cage hoisting：In the intersegmental I-shaped steel plate of increase of slot and step (3) one phase slot section both sides cast-in-situ bored pile steel
Muscle cage welds, and fish mouth muscle is welded on the steel reinforcement cage close to I-shaped steel plate, and I-shaped plate joint and fish mouth muscle are welded,
Slot section connector is formed, I-shaped steel plate connector is integrally hung in groove inlet section together with a phase slot section both sides steel reinforcement cage.
(5) concreting：Using the method for underwater concreting, one-piece casting grooving.
Further, Screw arbor with nut at both-ends is arranged as 500mmX600mm in step (2), and cross-brace uses 48 steel pipes of Φ, spacing
500mm, flitch use 100X100, step pitch 1000mm.
Further, step (3) is in borehole filling pile cage of reinforcement process, the vertical main reinforcement at left and right sides of steel reinforcement cage
Spacing is adjusted to 10cm along groove width direction, and reduces the spacing between the vertical main reinforcement of steel reinforcement cage upper and lower ends.
Further, after the welding of step (5) I-shaped steel plate, I-shaped steel plate bottom is above the absolute altitude of steel reinforcement cage bottom surface
250mm is sphenocephaly, is 500mm above steel reinforcement cage top surface absolute altitude at the top of I-shaped steel plate.
Further, led in step (2) and reinforcing bar or steel plate are embedded on wall, after the completion of reinforcing bar cage hoisting decentralization, used
Reinforcing bar welds steel reinforcement cage with leading reinforcing bar pre-buried on wall or steel plate, prevents rising of steel cage.
Further, in step (6) during underwater concreting, when slot section connector has concrete slurry outflow, to phase
During adjacent slot section grooving, pile monkey must be rushed with Φ 780mm and is backwashed overflowed concrete, with the plane set-hammer of special strip wire brush in end steel
Silt particle on plate is removed totally, makes the soil dirt for being attached to seam crossing as few as possible.
After more than structure, the invention has the advantages that：Under the conditions of rich water thick sand bed
The attached building enclosure construction technology in subway station, i.e. ground-connecting-wall entirety grooving technology+borehole filling pile cage of reinforcement, and using fish mouth
The construction technology for the connector slot section sealing that muscle and steel reinforcement cage and I-steel weld, make building enclosure under the conditions of rich water thick sand bed every
Water effect is more preferable, reduces leak stopping cost, greatly facilitates site operation, shortens the building enclosure construction period, is in addition filled in drilling
It notes in pile cages process, the vertical main reinforcement spacing in part is adjusted, along groove width direction, left and right sides spacing is adjusted to
10cm, upper and lower reinforcing bar tune is close, and since both sides reinforcing bar is main principal rod above and below wall steel bar cage, the left and right sides aids in stress, this
Kind adjustment is favourable to building enclosure wall stress.
Description of the drawings
Fig. 1 is the steel that the present invention provides for the attached building enclosure construction technology in subway station under the conditions of rich water thick sand bed
The vertical main reinforcement distributed architecture schematic diagram of muscle cage.
Fig. 2 is the slot that the present invention provides for the attached building enclosure construction technology in subway station under the conditions of rich water thick sand bed
Section connector fish mouth muscle structure diagram.
As shown in the figure：1st, a phase slot, 2, I-shaped steel plate, 3, steel reinforcement cage, 301, the vertical main reinforcement at left and right sides of steel reinforcement cage,
302nd, the vertical main reinforcement of steel reinforcement cage upper and lower ends, 4, fish mouth muscle.
Specific embodiment
With reference to attached drawing 1,2, for the attached building enclosure construction technology in subway station under the conditions of rich water thick sand bed, it includes
Following steps：
(1) surveying setting-out：It is taken multiple measurements according to the traverse point of construction requirement and elevation, after accurate, by four etc.
Control point is encrypted in conducting wire code requirement, and measuring goes out the ground center line that wall is led in underground, while the center line setting-out of circuit
Out, checking the correctness for the center line for leading wall.
(2) construction of guide wall：It according to the measurement result of step (1), is excavated along center line both sides, constructs and lead wall, using to drawing
Screw rod is as the support construction for leading wall, using flitch as the support construction between leading wall.
(3) trenching construction：The technique that ground-connecting-wall entirety grooving is taken with chute forming machine or impact drill, a phase slot 1 of constructing, standard
Combination is grabbed in the wide 5.5m of slot section, punching.
(4) fabrication of reinforcing cage：Borehole filling pile cage of reinforcement 3 is used in the phase slot 1 constructed in step (3)；
(5) reinforcing bar cage hoisting：With reference to attached drawing 1,2, in 1 section two of the intersegmental I-shaped steel plate 2 of increase of slot and (3) one phase slot of step
Side borehole filling pile cage of reinforcement 3 welds, and welds fish mouth muscle 4 on the steel reinforcement cage 3 close to I-shaped steel plate 2, and by i shaped steel
2 connector of plate is welded with fish mouth muscle 4, forms slot section connector, and I-shaped 2 connector of steel plate is whole together with a phase slot section both sides steel reinforcement cage 3
Body is hung in groove inlet section.
(5) concreting：Using the method for underwater concreting, one-piece casting grooving.
As the present embodiment preferred embodiment, Screw arbor with nut at both-ends is arranged as 500mmX600mm in step (2), laterally
Support uses 100X100, step pitch 1000mm using 48 steel pipes of Φ, spacing 500mm, flitch.
With reference to attached drawing 1, as the present embodiment preferred embodiment, step (3) is processed in borehole filling pile cage of reinforcement 3
In the process, 301 spacing of vertical main reinforcement at left and right sides of steel reinforcement cage is adjusted to 10cm along groove width direction, and reduces steel reinforcement cage upper and lower ends
Vertical main reinforcement 302 between spacing.
With reference to attached drawing 2, as the present embodiment preferred embodiment, after the I-shaped steel plate 2 of step (5) welds, I-shaped
2 bottom of shape steel plate is 250mm above 3 bottom surface absolute altitude of steel reinforcement cage, is sphenocephaly, and I-shaped 2 top of steel plate is 3 top surface mark of steel reinforcement cage
High top 500mm.
As the present embodiment preferred embodiment, led in step (2) and reinforcing bar or steel plate are embedded on wall, in steel reinforcement cage
After the completion of 3 lifting decentralizations, steel reinforcement cage 3 with leading reinforcing bar pre-buried on wall or steel plate is welded using reinforcing bar, prevents steel reinforcement cage
It floats.
As the present embodiment preferred embodiment, in step (6) during underwater concreting, when slot section connector have it is mixed
When solidifying soil paste liquid stream goes out, during to adjacent slot section grooving, pile monkey must be rushed with Φ 780mm and is backwashed overflowed concrete, with special band
Silt particle of the plane set-hammer of wire brush on the steel plate of end is removed totally, makes the soil dirt for being attached to seam crossing as few as possible.
As the present embodiment preferred embodiment, a 50t automobile can be used in step (5) the reinforcing bar cage hoisting stage
It hangs and is lifted with a 25t truck crane, be not required to lift using large caterpillar.
The present invention and embodiments thereof are described above, this description is no restricted, attached shown in figure
Simply one of embodiments of the present invention, actual structure are not limited thereto.All in all if the ordinary skill of this field
Personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution phase
As frame mode and embodiment, be within the scope of protection of the invention.
Claims (6)
1. for the attached building enclosure construction technology in subway station under the conditions of rich water thick sand bed, it is characterised in that：It include with
Lower step：
(1) surveying setting-out：It is taken multiple measurements according to the traverse point of construction requirement and elevation, after accurate, by four grade conducting wires
Control point is encrypted in code requirement, and measuring goes out the ground center line that wall is led in underground, while the center line setting-out of circuit is come out,
To check the correctness for the center line for leading wall.
(2) construction of guide wall：According to the measurement result of step (1), excavated along center line both sides, construct and lead wall, using Screw arbor with nut at both-ends
As the support construction for leading wall, using flitch as the support construction between leading wall.
(3) trenching construction：The technique that ground-connecting-wall entirety grooving is taken with chute forming machine or impact drill, a phase slot of constructing, standard cell section
Combination is grabbed in wide 5.5m, punching.
(4) fabrication of reinforcing cage：Borehole filling pile cage of reinforcement is used in the phase slot constructed in step (3)；
(5) reinforcing bar cage hoisting：In the intersegmental I-shaped steel plate of increase of slot and step (3) one phase slot section both sides borehole filling pile cage of reinforcement
Welding welds fish mouth muscle on the steel reinforcement cage close to I-shaped steel plate, and I-shaped plate joint and fish mouth muscle is welded, and is formed
Slot section connector, I-shaped plate joint are integrally hung in groove inlet section together with a phase slot section both sides steel reinforcement cage.
(5) concreting：Using the method for underwater concreting, one-piece casting grooving.
2. the subway station attached building enclosure construction technology according to claim 1 under the conditions of rich water thick sand bed,
It is characterized in that：Screw arbor with nut at both-ends is arranged as 500mmX600mm in step (2), and cross-brace uses 48 steel pipes of Φ, spacing 500mm,
Flitch uses 100X100, step pitch 1000mm.
3. the subway station attached building enclosure construction technology according to claim 1 under the conditions of rich water thick sand bed,
It is characterized in that：Step (3) is in borehole filling pile cage of reinforcement process, the vertical main reinforcement spacing edge at left and right sides of steel reinforcement cage
Groove width direction is adjusted to 10cm, and reduces the spacing between the vertical main reinforcement of steel reinforcement cage upper and lower ends.
4. the subway station attached building enclosure construction technology according to claim 1 under the conditions of rich water thick sand bed,
It is characterized in that：After the I-shaped steel plate welding of step (5), I-shaped steel plate bottom is 250mm above the absolute altitude of steel reinforcement cage bottom surface, is
Sphenocephaly, I-shaped steel plate top is 500mm above steel reinforcement cage top surface absolute altitude.
5. the subway station attached building enclosure construction technology according to claim 1 under the conditions of rich water thick sand bed,
It is characterized in that：It is led in step (2) and reinforcing bar or steel plate is embedded on wall, it, will using reinforcing bar after the completion of reinforcing bar cage hoisting decentralization
Steel reinforcement cage is welded with leading reinforcing bar pre-buried on wall or steel plate, prevents rising of steel cage.
6. the subway station attached building enclosure construction technology according to claim 1 under the conditions of rich water thick sand bed,
It is characterized in that：In step (6) during underwater concreting, when slot section connector has concrete slurry outflow, to adjacent slot section
During grooving, pile monkey must be rushed with Φ 780mm and is backwashed overflowed concrete, with the plane set-hammer of special strip wire brush on the steel plate of end
Silt particle is removed totally, makes the soil dirt for being attached to seam crossing as few as possible.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711221614.2A CN108049393A (en) | 2017-11-24 | 2017-11-24 | For the attached building enclosure construction technology in subway station under the conditions of rich water thick sand bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711221614.2A CN108049393A (en) | 2017-11-24 | 2017-11-24 | For the attached building enclosure construction technology in subway station under the conditions of rich water thick sand bed |
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| Publication Number | Publication Date |
|---|---|
| CN108049393A true CN108049393A (en) | 2018-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711221614.2A Pending CN108049393A (en) | 2017-11-24 | 2017-11-24 | For the attached building enclosure construction technology in subway station under the conditions of rich water thick sand bed |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109610471A (en) * | 2018-12-07 | 2019-04-12 | 深圳市工勘岩土集团有限公司 | Deep basal pit five combined type pile forming construction methods of full meat or fish interlocking pile hydraulic grab |
| CN110206036A (en) * | 2019-04-30 | 2019-09-06 | 杭州市市政工程集团有限公司 | Shallow construction of diaphragm wall technique after a kind of elder generation's depth |
| CN110331727A (en) * | 2019-07-11 | 2019-10-15 | 江西建工第二建筑有限责任公司 | The supporting construction and construction method that bored concrete pile and diaphram wall combine |
| CN110424433A (en) * | 2019-07-12 | 2019-11-08 | 广州穗岩土木科技股份有限公司 | A kind of diaphragm wall joint flexible water stop installing and method |
| CN112195947A (en) * | 2020-09-09 | 2021-01-08 | 万金山 | Preparation process of self-plugging impervious curtain type concrete precast pile |
| CN113684837A (en) * | 2021-09-16 | 2021-11-23 | 中国建设基础设施有限公司 | Pile-wall type foundation pit supporting and water stopping integrated structure and construction method thereof |
Citations (1)
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| CN104775439A (en) * | 2015-04-20 | 2015-07-15 | 中建南方投资有限公司 | Foundation pit support and water stop integrated structure and construction method thereof |
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2017
- 2017-11-24 CN CN201711221614.2A patent/CN108049393A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104775439A (en) * | 2015-04-20 | 2015-07-15 | 中建南方投资有限公司 | Foundation pit support and water stop integrated structure and construction method thereof |
Non-Patent Citations (1)
| Title |
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| 赵庆强等: "地下连续墙逆作法施工技术研究", 《广东土木与建筑》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109610471A (en) * | 2018-12-07 | 2019-04-12 | 深圳市工勘岩土集团有限公司 | Deep basal pit five combined type pile forming construction methods of full meat or fish interlocking pile hydraulic grab |
| CN110206036A (en) * | 2019-04-30 | 2019-09-06 | 杭州市市政工程集团有限公司 | Shallow construction of diaphragm wall technique after a kind of elder generation's depth |
| CN110206036B (en) * | 2019-04-30 | 2024-01-23 | 杭州市市政工程集团有限公司 | Underground diaphragm wall construction technology with depth first and depth later |
| CN110331727A (en) * | 2019-07-11 | 2019-10-15 | 江西建工第二建筑有限责任公司 | The supporting construction and construction method that bored concrete pile and diaphram wall combine |
| CN110331727B (en) * | 2019-07-11 | 2024-04-02 | 江西建工第二建筑有限责任公司 | Support structure combining cast-in-place pile and underground diaphragm wall and construction method |
| CN110424433A (en) * | 2019-07-12 | 2019-11-08 | 广州穗岩土木科技股份有限公司 | A kind of diaphragm wall joint flexible water stop installing and method |
| CN112195947A (en) * | 2020-09-09 | 2021-01-08 | 万金山 | Preparation process of self-plugging impervious curtain type concrete precast pile |
| CN113684837A (en) * | 2021-09-16 | 2021-11-23 | 中国建设基础设施有限公司 | Pile-wall type foundation pit supporting and water stopping integrated structure and construction method thereof |
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Application publication date: 20180518 |
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