CN110258572A - A kind of underwater excavation ground-connecting-wall and bottom concrete connection structure and method - Google Patents
A kind of underwater excavation ground-connecting-wall and bottom concrete connection structure and method Download PDFInfo
- Publication number
- CN110258572A CN110258572A CN201910534751.4A CN201910534751A CN110258572A CN 110258572 A CN110258572 A CN 110258572A CN 201910534751 A CN201910534751 A CN 201910534751A CN 110258572 A CN110258572 A CN 110258572A
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- China
- Prior art keywords
- magnetic pole
- wall
- ground
- pole stick
- notch
- 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.)
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Links
- 238000009412 basement excavation Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000945 filler Substances 0.000 claims abstract description 21
- 238000005266 casting Methods 0.000 claims abstract description 9
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 12
- 239000004619 high density foam Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000004140 cleaning Methods 0.000 abstract description 5
- 238000007569 slipcasting Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 239000002689 soil Substances 0.000 description 5
- 230000005389 magnetism Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/06—Placing concrete under water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
Abstract
The invention belongs to underwater excavation base pit engineering technical fields, specifically provide a kind of underwater excavation ground-connecting-wall and bottom concrete connection structure and method, variable magnetic pole stick is fixed in the notch of ground-connecting-wall inner sidewall, then built-in fitting is filled in the notch of ground-connecting-wall, so that the fixed magnetic pole stick on built-in fitting is abutted with the variable magnetic pole stick；Ground-connecting-wall merging foundation pit is underwater, and the polarity for changing variable magnetic pole stick makes variable magnetic pole stick and the fixed magnetic pole stick repel each other to which notch is discharged in built-in fitting, and built-in fitting emerges under buoyancy；In foundation pit underwater casting bottom concrete.Conduit filler difficulty and risk are reserved to reduce diver's underwater cleaning ground-connecting-wall, guarantee conduit inner stuffing automatic absorbing and disengaging conduit in the case where controllable using electromagnetism and Grouting Pipe, and the closed reliability after slip casting guarantees underwater concrete bottom slab concreting is rinsed and supplemented using Grouting Pipe, reduce underwater cleaning filler difficulty and risk.
Description
Technical field
The invention belongs to underwater excavation base pit engineering technical fields, and in particular to a kind of underwater excavation ground-connecting-wall and back cover are mixed
Solidifying soil connection structure and method.
Background technique
Foundation pit concrete placed under water bottom plate dummy seal is the important component of underwater excavation.In high artesian operating condition
Under, if cannot be effectively sealed between bottom concrete and building enclosure wall, easily generates to dash forward and gush risk, formed
Deep pit monitor accident.To reach effective sealing effect, conduit generally is reserved in seam crossing and carries out anti-Dispose by grouting, also there is use
Notch processing mode is reserved on ground-connecting-wall, that is, enclosed structure wall.Sealing technique is starched by reserved notch+back-pressure, presently mainly
It after taking out reserved conduit inner stuffing by diver's dive, then carries out pouring underwater concrete, finally using supplement slip casting
Guarantee sealing.
It is this by diver's dive by reserved conduit inner stuffing take out after-pouring underwater concrete in the way of, exist with
Lower problem: one, being muddy mud in foundation pit, artificial cleaning slot inner stuffing is insufficient；Two, as foundation depth increases, diving
Member's personal safety is increase accordingly.
Summary of the invention
The purpose of the present invention is overcome foundation pit concrete placed under water bottom plate dummy seal difficulty is high in the prior art to ask
Topic.
For this purpose, the present invention provides a kind of underwater excavation ground-connecting-walls and bottom concrete connection structure, including go deep into foundation pit
Underwater ground-connecting-wall further includes built-in fitting, and the ground-connecting-wall inner sidewall is equipped with notch, and the built-in fitting is filled in the notch
Interior, the notch bottom end is equipped with variable magnetic pole stick, and the built-in fitting is equipped with fixed magnetic pole corresponding with the variable magnetic pole stick
Stick, the variable magnetic pole stick are abutted with the fixed magnetic pole stick.
It preferably, further include Grouting Pipe, described Grouting Pipe one end passes through the ground-connecting-wall and extends in shown notch, institute
State Grouting Pipe other end connection pressure source.
Preferably, the pressure source is high pressure gas or highly pressurised liquid.
Preferably, the variable magnetic pole stick is electromagnet, and the fixed magnetic pole stick is permanent magnet.
Preferably, the electromagnet is connect by conducting wire with extraneous power supply, and the conducting wire and the Grouting Pipe are bound.
Preferably, the built-in fitting includes filler and tinfoil, and the tinfoil wraps up the paper filler, the filler
It seals and is fixed in lightweight box together with the fixed magnetic pole stick.
Preferably, the filler is high-density foam, and it is described to be filled in that the tinfoil wraps up the high-density foam
In notch.
Preferably, the variable magnetic pole stick and the notch inner wall weld.
Preferably, the notch includes at least one, and each notch is symmetrically distributed in the ground-connecting-wall inner wall.
The present invention also provides a kind of underwater excavation ground-connecting-walls and bottom concrete connection method, comprising:
Variable magnetic pole stick is fixed in the notch of ground-connecting-wall inner sidewall, then built-in fitting is filled in the notch of ground-connecting-wall
It is interior, so that the fixed magnetic pole stick on built-in fitting is abutted with the variable magnetic pole stick；
Ground-connecting-wall merging foundation pit is underwater, and the polarity for changing variable magnetic pole stick makes variable magnetic pole stick and the fixed magnetic pole
Stick repels each other to which notch is discharged in built-in fitting, and built-in fitting emerges under buoyancy；
In foundation pit underwater casting bottom concrete.
Beneficial effects of the present invention: this underwater excavation ground-connecting-wall provided by the invention and bottom concrete connection structure and
Variable magnetic pole stick is fixed in the notch of ground-connecting-wall inner sidewall, then built-in fitting is filled in the notch of ground-connecting-wall by method,
So that the fixed magnetic pole stick on built-in fitting is abutted with the variable magnetic pole stick；Ground-connecting-wall merging foundation pit is underwater, change variable magnetic
The polarity of pole stick makes variable magnetic pole stick and the fixed magnetic pole stick repel each other to which notch is discharged in built-in fitting, and built-in fitting is in buoyancy
It emerges under effect；In foundation pit underwater casting bottom concrete.It is filled out to reduce the reserved conduit of diver's underwater cleaning ground-connecting-wall
Object difficulty and risk are filled, guarantees conduit inner stuffing automatic absorbing and disengaging in the case where controllable using electromagnetism and Grouting Pipe
Conduit, and using Grouting Pipe flushing and the closed reliability after slip casting guarantees underwater concrete bottom slab concreting is supplemented, it reduces underwater
Clear up filler difficulty and risk.
The present invention is described in further details below with reference to attached drawing.
Detailed description of the invention
Fig. 1 is the structure of underwater excavation ground-connecting-wall and bottom concrete connection structure and method poured before bottom concrete
Schematic diagram；
Fig. 2 is the structure of underwater excavation ground-connecting-wall and bottom concrete connection structure and method poured after bottom concrete
Schematic diagram；
Fig. 3 is the part of underwater excavation ground-connecting-wall and bottom concrete connection structure and method poured before bottom concrete
A-A enlarged diagram.
Description of symbols: Grouting Pipe 1, built-in fitting 2, bottom concrete 3, fixed magnetic pole stick 21, filler 22, variable magnetic
Pole stick 4, ground-connecting-wall 5.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " center ", "upper", "lower", "front", "rear", " left side ",
The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure
Orientation or positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
Term " first ", " second " be used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or
Implicitly indicate the quantity of indicated technical characteristic." first " is defined as a result, the feature of " second " can be expressed or imply
Ground includes one or more of the features；In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or
It is more than two.
It is underwater including going deep into foundation pit the present invention provides a kind of underwater excavation ground-connecting-wall and bottom concrete connection structure
Ground-connecting-wall further includes built-in fitting, and the ground-connecting-wall inner sidewall is equipped with notch, and the built-in fitting is filled in the notch, described
Notch bottom end is equipped with variable magnetic pole stick, and the built-in fitting is equipped with fixed magnetic pole stick corresponding with the variable magnetic pole stick, described
Variable magnetic pole stick is abutted with the fixed magnetic pole stick.
It follows that as shown in Figures 1 to 3,1 underwater of ground-connecting-wall, outside is surrounded by the soil body, the soil of lower end underwater
In vivo, notch is offered on the inner wall of the part of underwater ground-connecting-wall 5, before ground-connecting-wall 5 enters water, is first installed in notch
Variable magnetic pole stick 4, variable magnetic pole 4 can be by pouring or glue is pasted and fixed in notch bottom end, the magnetism of variable magnetic pole stick 4
It can change.Then the built-in fitting with fixed magnetic pole stick 21 is filled to notch, so that fixed magnetic pole stick 21 and variable magnetic
Pole stick 4 is abutted together, at this point, the polarity of control variable magnetic pole stick 4, so that fixed magnetic pole stick 21 and variable magnetic pole stick 4 are mutual
Attract, is fixed so that built-in fitting is preferably embedded in notch.When ground-connecting-wall 5 sinks to water with filled built-in fitting together
After descending and fixing, need first to take out built-in fitting at this time to facilitate pouring for bottom concrete 3.Being changed at this time by remotely control can
Become the polarity of magnetic pole stick 4, and the magnetism of fixed magnetic pole stick 21 is constant, therefore variable magnetic pole stick 4 and fixed magnetic pole stick 21 are mutually arranged
Reprimand, releases built-in fitting under the action of pulse repulsive force, built-in fitting enters in water, under the action of water buoyancy out of notch
It emerges and takes away.Then underwater casting bottom concrete 3 is carried out again, and bottom concrete 3, which enters, to be made to seal in notch
Base concrete 3 and ground-connecting-wall 5 are completely embedded and better tightness.
Preferred scheme further includes Grouting Pipe, and described Grouting Pipe one end passes through the ground-connecting-wall and extends to shown notch
Interior, the Grouting Pipe other end connects pressure source.It is reached in notch as shown in figure 3, Grouting Pipe 1 passes through ground-connecting-wall 5 from the external world, and
Variable magnetic pole stick 4 across notch bottom end, the fixed magnetic pole stick 21 of the opposite built-in fitting of the opening of Grouting Pipe 1.In installation built-in fitting
When, Grouting Pipe 1 can be connect into negative source, such as aspiration pump, so that Grouting Pipe 1 generates suction, built-in fitting is preferably embedded in
It is filled in notch；When the lower hydropexis of ground-connecting-wall 5 needs to take out built-in fitting, Grouting Pipe 1 is connect into positive pressure source at this time, such as
High-pressure pump, the built-in fitting into notch are blown, and built-in fitting is blown out notch, then connects hydraulic power source, in notch into
Row next step easy to clean pours；After taking out built-in fitting, underwater casting bottom concrete 3 is carried out, to underwater back cover coagulation
Soil 3 pours after completion reaches some strength, and grouting pump 1 is connected slush pump, to back-pressure slurry is carried out in notch, is played further close
The effect of envelope.
Preferred scheme, the pressure source are high pressure gas or highly pressurised liquid.It follows that 1 port of Grouting Pipe is activity
Interface can connect different pressure sources according to the demand of different time.
Preferred scheme, the variable magnetic pole stick are electromagnet, and the fixed magnetic pole stick is permanent magnet, the electromagnetism Tie Tong
It crosses conducting wire to connect with extraneous power supply, the conducting wire and the Grouting Pipe are bound.It follows that electromagnet is carried out by two conducting wires
On-off controls magnetic force and magnetism, and two conducting wires of electromagnet are close to Grouting Pipe 1 and lead to 5 outside of ground-connecting-wall, according to reality
It needs, the positive and negative anodes access for exchanging conducting wire can change the magnetism of electromagnet, and the size of electric current is accessed by control, can be controlled
Active force of the electromagnet to permanent magnet.
Preferred scheme, the built-in fitting include filler and tinfoil, and the tinfoil wraps up the paper filler, described to fill out
It fills object and is sealed together with the fixed magnetic pole stick and is fixed in lightweight box.It follows that being wrapped up filler with tinfoil, rise
To the effect of fire insulation water proof, and tinfoil has flexibility, when installing built-in fitting, changes filler to a certain extent by squeezing
22 shape is increased in size built-in fitting as far as possible and notch inner wall laminating degree.Filler and fixed magnetic pole stick are all fixed on
In lightweight box, in the net that lightweight box can be aluminium foil or plastic ties are knitted etc., effect is to be fixed on fixed magnetic pole stick with filler
Together.
Preferred scheme, the filler are high-density foam, and the tinfoil wraps up the high-density foam to be filled in
In the notch.It follows that filler 22 is high-density foam, foam has certain ductility, is wrapped up by tinfoil close
Envelope, when built-in fitting in notch from after being expelled in water, the buoyancy of high-density foam entire built-in fitting emerge to be convenient for back
It receives.
Preferred scheme, the variable magnetic pole stick and the notch inner wall weld.It follows that variable magnetic pole stick 4 welds
It is fixed in notch, avoids falling off.
Preferred scheme, the notch include at least one, and each notch is symmetrically distributed in the ground-connecting-wall inner wall.By
This is it is found that notch is more, is pouring back cover coagulation as shown in Figure 1, the notch being located on underwater ground-connecting-wall inner sidewall has multiple
It more seals and connects closer when soil 3.
The present invention also provides a kind of underwater excavation ground-connecting-walls and bottom concrete connection method, comprising:
Variable magnetic pole stick is fixed in the notch of ground-connecting-wall inner sidewall, then built-in fitting is filled in the notch of ground-connecting-wall
It is interior, so that the fixed magnetic pole stick on built-in fitting is abutted with the variable magnetic pole stick；
Ground-connecting-wall merging foundation pit is underwater, and the polarity for changing variable magnetic pole stick makes variable magnetic pole stick and the fixed magnetic pole
Stick repels each other to which notch is discharged in built-in fitting, and built-in fitting emerges under buoyancy；
In foundation pit underwater casting bottom concrete.
Specifically steps are as follows: as depicted in figs. 1 and 2, pre-buried variable magnetic pole stick 4 on the steel reinforcement cage on present ground-connecting-wall 5,
Built-in fitting is filled out between notch and concrete placed under water on ground-connecting-wall 5, built-in fitting includes high density filler and fixed magnetic pole
Stick.In Excavation Process, using the positive attraction of magnetic pole come the built-in fitting in fixed notch.Underwater casting bottom concrete
Before 3, change the magnetic force direction of variable magnetic pole stick 4, is sprayed using the direction force fit Grouting Pipe 1 of variable magnetic pole stick 4
Built-in fitting is automatically disengaged notch, recycles water buoyancy that built-in fitting floats automatically, drain into outside foundation pit by the gas of certain pressure.
After the completion of bottom concrete 3 pours under water, Grouting Pipe 1 is recycled to carry out back-pressure slurry filling sealing.
Beneficial effects of the present invention: this underwater excavation ground-connecting-wall provided by the invention and bottom concrete connection structure and
Variable magnetic pole stick is fixed in the notch of ground-connecting-wall inner sidewall, then built-in fitting is filled in the notch of ground-connecting-wall by method,
So that the fixed magnetic pole stick on built-in fitting is abutted with the variable magnetic pole stick；Ground-connecting-wall merging foundation pit is underwater, change variable magnetic
The polarity of pole stick makes variable magnetic pole stick and the fixed magnetic pole stick repel each other to which notch is discharged in built-in fitting, and built-in fitting is in buoyancy
It emerges under effect；In foundation pit underwater casting bottom concrete.It is filled out to reduce the reserved conduit of diver's underwater cleaning ground-connecting-wall
Object difficulty and risk are filled, guarantees conduit inner stuffing automatic absorbing and disengaging in the case where controllable using electromagnetism and Grouting Pipe
Conduit, and using Grouting Pipe flushing and the closed reliability after slip casting guarantees underwater concrete bottom slab concreting is supplemented, it reduces underwater
Clear up filler difficulty and risk.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.
Claims (10)
1. a kind of underwater excavation ground-connecting-wall and bottom concrete connection structure, including going deep into the underwater ground-connecting-wall of foundation pit, feature
It is: further includes built-in fitting, the ground-connecting-wall inner sidewall is equipped with notch, and the built-in fitting is filled in the notch, the slot
Mouthful bottom end is equipped with variable magnetic pole stick, and the built-in fitting is equipped with fixed magnetic pole stick corresponding with the variable magnetic pole stick, it is described can
Become magnetic pole stick to abut with the fixed magnetic pole stick.
2. underwater excavation ground-connecting-wall according to claim 1 and bottom concrete connection structure, it is characterised in that: further include
Grouting Pipe, described Grouting Pipe one end pass through the ground-connecting-wall and extend in shown notch, the Grouting Pipe other end connection pressure
Power source.
3. underwater excavation ground-connecting-wall according to claim 2 and bottom concrete connection structure, it is characterised in that: the pressure
Power source is high pressure gas or highly pressurised liquid.
4. underwater excavation ground-connecting-wall according to claim 1 and bottom concrete connection structure, it is characterised in that: it is described can
Become magnetic pole stick as electromagnet, the fixed magnetic pole stick is permanent magnet.
5. underwater excavation ground-connecting-wall according to claim 4 and bottom concrete connection structure, it is characterised in that: the electricity
Magnet is connect by conducting wire with extraneous power supply, and the conducting wire and the Grouting Pipe are bound.
6. underwater excavation ground-connecting-wall according to claim 1 or 4 and bottom concrete connection structure, it is characterised in that: institute
Stating built-in fitting includes filler and tinfoil, and the tinfoil wraps up the paper filler, the filler and the fixed magnetic pole stick
Sealing is fixed in lightweight box together.
7. underwater excavation ground-connecting-wall according to claim 6 and bottom concrete connection structure, it is characterised in that: described to fill out
Filling object is high-density foam, and the tinfoil wraps up the high-density foam to be filled in the notch.
8. underwater excavation ground-connecting-wall according to claim 1 and bottom concrete connection structure, it is characterised in that: it is described can
Become magnetic pole stick and the notch inner wall welds.
9. underwater excavation ground-connecting-wall according to claim 1 and bottom concrete connection structure, it is characterised in that: the slot
Mouth includes at least one, and each notch is symmetrically distributed in the ground-connecting-wall inner wall.
10. a kind of underwater excavation ground-connecting-wall and bottom concrete connection method characterized by comprising
Variable magnetic pole stick is fixed in the notch of ground-connecting-wall inner sidewall, then built-in fitting is filled in the notch of ground-connecting-wall,
So that the fixed magnetic pole stick on built-in fitting is abutted with the variable magnetic pole stick；
Ground-connecting-wall merging foundation pit is underwater, and the polarity for changing variable magnetic pole stick makes variable magnetic pole stick and the fixed magnetic pole stick phase
To which notch is discharged in built-in fitting, built-in fitting emerges reprimand under buoyancy；
In foundation pit underwater casting bottom concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910534751.4A CN110258572A (en) | 2019-06-20 | 2019-06-20 | A kind of underwater excavation ground-connecting-wall and bottom concrete connection structure and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910534751.4A CN110258572A (en) | 2019-06-20 | 2019-06-20 | A kind of underwater excavation ground-connecting-wall and bottom concrete connection structure and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110258572A true CN110258572A (en) | 2019-09-20 |
Family
ID=67919615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910534751.4A Pending CN110258572A (en) | 2019-06-20 | 2019-06-20 | A kind of underwater excavation ground-connecting-wall and bottom concrete connection structure and method |
Country Status (1)
| Country | Link |
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| CN (1) | CN110258572A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441367A (en) * | 2020-04-24 | 2020-07-24 | 中铁隆工程集团有限公司 | Strong permeable stratum bottom sealing concrete separate-bin pouring structure and construction method |
| CN111441389A (en) * | 2020-04-24 | 2020-07-24 | 中铁隆工程集团有限公司 | Anti-leakage connecting structure of underground continuous wall and bottom sealing concrete and construction method |
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