CN107288227B - A kind of construction method of prefabricated superimposed sheet piece waterproof sealing - Google Patents
A kind of construction method of prefabricated superimposed sheet piece waterproof sealing Download PDFInfo
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- CN107288227B CN107288227B CN201710472499.XA CN201710472499A CN107288227B CN 107288227 B CN107288227 B CN 107288227B CN 201710472499 A CN201710472499 A CN 201710472499A CN 107288227 B CN107288227 B CN 107288227B
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- prefabricated
- superimposed sheet
- cover board
- prefabricated superimposed
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6801—Fillings therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6803—Joint covers
- E04B1/6804—Joint covers specially adapted for floor parts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6806—Waterstops
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
- E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Building Environments (AREA)
Abstract
The invention discloses a kind of construction methods of prefabricated superimposed sheet piece waterproof sealing, include the following steps: step 1: the production of prefabricated superimposed sheet and prefabricated cover board；Step 2: the prefabricated production to bolt component is worn；Step 3: the installation of prefabricated superimposed sheet；Step 4: the installation of prefabricated cover board and the construction of rear pouring concrete；The construction method can effectively solve the prefabricated superimposed sheet building of tradition causes house a series of problems, such as the leakage and floor of edge joint position crack in edge joint position because crack resistence, leak-proof construction deal with the requirement that cannot be guaranteed construction quality improperly, pass through the preferred of process improving and material, constructing operation can be made easier, lifting construction efficiency, more easily guarantee construction quality, it shortens the construction period, to avoid prefabricated superimposed sheet in edge joint position cracking, the generation of infiltration phenomenon.
Description
Technical field
The invention belongs to building fields, and in particular to a kind of construction method of prefabricated superimposed sheet piece waterproof sealing.
Background technique
Assembled architecture, since largely work creates advantage in factory's progress for building industrialization for it.Assembly
Formula building has many advantages, such as that mechanization of building operation degree height, short time limit, live recruitment is few, wet construction is few, small by seasonal effect.Assembly
The required precision that formula building makes component and lifts is higher, it is necessary to which scientific construction organization and administration just can guarantee construction quality.Dress
With formula concrete structure construction technology on a large scale in China's housing industrialization process of construction, wherein prefabricated superimposed sheet
The waterproof measures of preventing water of edge joint position be housing quality guarantee a Xiang Chongdian, although at this stage piece, seam construction technology by
It is gradually mature, but due to the presence of various odjective causes, prefabricated superimposed sheet still has different journeys in edge joint position cracking, infiltration situation
The presence of degree.
Therefore, it is necessary to a kind of construction methods that can effectively solve the above problem.
Summary of the invention
The technical problem to be solved by the present invention is providing a kind of construction method of prefabricated superimposed sheet piece waterproof sealing, make
The prefabricated superimposed sheet building of tradition can be effectively solved with the present invention to deal with improperly and cannot protect because of crack resistence, leak-proof construction in edge joint position
It demonstrate,proves the requirement of construction quality and house is caused to pass through process improving a series of problems, such as the leakage and floor of edge joint position crack
It is preferred with material, constructing operation can be made easier, lifting construction efficiency mores easily guarantee construction quality, shortens the construction period, thus
Avoid prefabricated superimposed sheet in edge joint position cracking, the generation of infiltration phenomenon.
The technical solution that the present invention solves technical problem is as follows:
A kind of construction method of prefabricated superimposed sheet piece waterproof sealing of the present invention, includes the following steps:
Step 1: the production of prefabricated superimposed sheet and prefabricated cover board；Prefabricated overlapping is determined according to design drawing and national regulation
The specific size and positioning of plate and prefabricated cover board simultaneously carry out prefabricated construction；When the prefabricated superimposed sheet is prefabricated, designated position is pre-
It is embedded with embedded bar, setting is jagged above edge, and stitching portion is set as wedge shape structure；The prefabricated cover board is prefabricated
When, designated position is provided with reserved steel bar perforation and reserved bolt penetration hole, the side of both sides of the edge shape and prefabricated superimposed sheet
Notch geometry above edge is mutually agreed with；Maintenance work is carried out after prefabricated construction in time, and regularly schedules special messenger and checks maintenance
Quality；
Step 2: the prefabricated production to bolt component is worn；It is determined according to design drawing and national regulation prefabricated to wearing bolt
The specific size of component is simultaneously made；
Step 3: the installation of prefabricated superimposed sheet；Special messenger's supervision is arranged when the prefabricated superimposed sheet of live handling, it is ensured that hoisting process
In prefabricated superimposed sheet do not damage, the stitching portion of prefabricated superimposed sheet and the stitching portion of contiguous prefabricated superimposed sheet are spliced,
Two pieces of prefabricated superimposed sheet edge joint positions installations are prefabricated to wearing bolt component, while ensuring two pieces of prefabricated superimposed sheet height differences in zone of reasonableness
It is interior；After installing, in the edge joint position of two pieces of prefabricated superimposed sheets and to being inserted at the gap for wearing bolt component and prefabricated superimposed sheet
Gap filler；
Step 4: the installation of prefabricated cover board and the construction of rear pouring concrete；Prefabricated cover board is mounted on two pieces of prefabricated overlappings
Above plate edge joint position, prefabricated the screw rod for wearing bolt component is worn embedded bar and from reserved steel bar perforation and reserved bolt respectively
It is pierced by hole, while ensuring that the upper surface of prefabricated cover board is consistent with the upper level of two pieces of prefabricated superimposed sheets；It is logical using nut
It crosses and prefabricated prefabricated cover board and prefabricated superimposed sheet is fixed to wearing bolt component；Between prefabricated cover board and prefabricated superimposed sheet
Gap and prefabricated cover board and it is prefabricated at the gap worn between bolt component insert gap filler；Finally bind prefabricated superimposed sheet and
Pouring concrete is constructed after reinforcing bar and progress above prefabricated cover board；Notice that coarse-fine aggregate quality is answered when pouring concrete mix after described
Meet the requirement of " concrete structure engineering job specfication " GB50666-2011, cobble-stone diameter should control the coagulation in layout design
Within the scope of the cobble-stone diameter of the corresponding code requirement of native grade, stone clay content need to be controlled 1% hereinafter, sand clay content need to control
2% hereinafter, the ratio of mud is controlled 0.38 hereinafter, sand coarse aggregate ratio control is 50% or so, wherein preparing prefabricated superimposed sheet edge joint position
Afterwards when pouring concrete, the polypropylene fibre, swelling agent and water-reducing agent of 5% parameter are added on the basis of above-mentioned concrete；After pour it is mixed
Solidifying soil carried out after pouring it is secondary vibrate and manually plaster, then carry out maintenance work.
Further, when making prefabricated cover board in the step 1, the arranging using film covering after its concrete final set
It applies and guarantees its quality.
Further, the gap filler in the step 3 and step 4 is the weather-proof silicone structure for mixing appropriate swelling agent
Glue.
Further, in the step 3 height difference of two pieces of prefabricated superimposed sheets within 10mm.
Further, when polypropylene fibre being added in the step 4, to guarantee that polypropylene fibre is uniformly dispersed, will first gather
Tacryl, which is added to the water, sufficiently to be stirred scattered, is added mixing drum and is stirred together with concrete.
Further, the maintenance method of rear pouring concrete using watering or takes film covering curing in the step 4.
It further, can be at one layer of concrete interface of external coating of prefabricated cover board before rear pouring concrete construction in the step 4
Agent, to increase the cohesive force of prefabricated cover board Yu rear pouring concrete.
After construction method of the present invention is applied in work progress, it can effectively solve prefabricated superimposed sheet and go out in edge joint position
The problem of now leaking and crack, work progress is easy to operate and construction quality can be guaranteed, while its material used of constructing
Material have the characteristics that it is cheap, have excellent performance, in temperature without area jumpy with stronger applicability.
Detailed description of the invention
Fig. 1 is heretofore described method construction schematic diagram；
Fig. 2 is of the present invention prefabricated to wearing bolt component structural schematic diagram；
Fig. 3 is prefabricated covering plate structure schematic diagram of the present invention；
Schematic top plan view when Fig. 4 is two pieces of prefabricated superimposed sheet splicing installations in construction method of the present invention；
In figure: 1: prefabricated superimposed sheet 2: prefabricated to wearing bolt component 2-1: reserved bolt penetration hole 3: gap filler 4: nut
5: prefabricated cover board 6: embedded bar 6-1: reserved steel bar perforation 7: wedge shape structure.
Specific embodiment
In order to preferably explain the present invention, what the present invention is furture elucidated in the following with reference to the drawings and specific embodiments is interior
Hold, but the contents of the present invention are not limited only to following embodiment.
As shown in Figures 1 to 4, a kind of construction method of prefabricated superimposed sheet piece waterproof sealing, includes the following steps:
Step 1: the production of prefabricated superimposed sheet 1 and prefabricated cover board 5；It is determined according to design drawing and national regulation prefabricated folded
The specific size and positioning of plywood 1 and prefabricated cover board 5 simultaneously carry out prefabricated construction；When the prefabricated superimposed sheet 1 is prefabricated, specific bit
It sets and is embedded with embedded bar, setting is jagged above edge, and stitching portion is set as wedge shape structure 7；The prefabricated cover board 5
When prefabricated, designated position be provided with reserved steel bar perforation 6-1 and reserved bolt penetration hole 2-1, both sides of the edge shape with it is prefabricated
Notch geometry above the edge of superimposed sheet 1 is mutually agreed with；Maintenance work is carried out after prefabricated construction in time, and is regularly scheduled specially
People checks maintenance quality；The stitching portion of prefabricated superimposed sheet 1 is set as wedge shape structure 7, the in this way spelling when two pieces of prefabricated superimposed sheets 1
When connecing, the wedge shape structure 7 of one piece of prefabricated superimposed sheet 1 can be embedded in the wedge shape structure 7 of another piece of prefabricated superimposed sheet 1, can be with
Deviation when effectively control is constructed on position, and it is easily formed an entirety, convenient for the need of prefabricated 1 edge joint position of superimposed sheet construction
It wants, effect is good；When making prefabricated cover board 5, its quality is guaranteed using the measure of film covering after its concrete final set.
Step 2: the prefabricated production to bolt component 2 is worn；It is determined according to design drawing and national regulation prefabricated to wearing bolt
The specific size of component 2 is simultaneously made；
Step 3: the installation of prefabricated superimposed sheet 1；Special messenger's supervision is arranged when the prefabricated superimposed sheet 1 of live handling, it is ensured that was lifted
Prefabricated superimposed sheet 1 does not damage in journey, and the stitching portion of prefabricated superimposed sheet 1 and the stitching portion of contiguous prefabricated superimposed sheet 1 are spelled
It connects, it is prefabricated to wearing bolt component 2 in two pieces of prefabricated 1 edge joint positions of superimposed sheet installations, while ensuring that two pieces of prefabricated 1 height differences of superimposed sheet exist
In zone of reasonableness；After installing, in the edge joint position of two pieces of prefabricated superimposed sheets 1 and to wearing bolt component 2 and prefabricated superimposed sheet
Gap filler 3 is inserted at gap；Here when the two pieces of prefabricated splicing of superimposed sheet 1 installations, by the wedge shape structure of one piece of prefabricated superimposed sheet 1
The wedge shape structure 7 of 7 one piece of prefabricated superimposed sheet 1 of insertion, and it is prefabricated to wearing bolt structure in two pieces of prefabricated 1 edge joint positions of superimposed sheet installations
Part 2 so that connection is stronger, while can more effectively control the deviation in the levelness and heights of two pieces of contiguous prefabricated superimposed sheets 1；
The impermeability at edge joint position or gap can be improved using gap filler 3, the appropriate swelling agent of incorporation can be used in gap filler 3 herein
Weather-proof structural silicone adhesive, material price is cheap, has excellent performance.
Step 4: the installation of prefabricated cover board 5 and the construction of rear pouring concrete；By prefabricated cover board 5 be mounted on two pieces it is prefabricated folded
Above plywood 1 edge joint position, by embedded bar 6 and prefabricated to wearing the screw rod of bolt component 2 respectively from reserved steel bar perforation 6-1 and pre-
It stays and is pierced by bolt penetration hole 2-1, while ensuring the upper surface of prefabricated cover board 5 and the upper level one of two pieces of prefabricated superimposed sheets 1
It causes；Prefabricated cover board 5 and prefabricated superimposed sheet 1 are fixed by prefabricated to wearing bolt component 2 using nut 4；In prefabricated cover board 5
Gap and prefabricated cover board 5 between prefabricated superimposed sheet 1 and prefabricated to inserting gap filler at the gap worn between bolt component 2
3；Pouring concrete is constructed after finally binding the reinforcing bar of 5 top of prefabricated superimposed sheet 1 and prefabricated cover board and progress；Pouring concrete after described
Notice that coarse-fine aggregate quality should meet the requirement of " concrete structure engineering job specfication " GB50666-2011, stone grain when mix
Diameter should control in layout design within the scope of the cobble-stone diameter of the corresponding code requirement of concrete grade, and stone clay content need to control
1% hereinafter, sand clay content need to control 2% hereinafter, the ratio of mud control 0.38 hereinafter, sand coarse aggregate ratio control 50% or so, wherein
When preparing the rear pouring concrete of prefabricated 1 edge joint position of superimposed sheet, the polypropylene of 5% parameter is added on the basis of above-mentioned concrete
Fiber, swelling agent and water-reducing agent；Carried out after pouring concrete pours afterwards it is secondary vibrate and manually plaster, then conserved
Work, maintenance method is using watering or takes film covering curing, pays attention to curing time and curing temperature；It is guarantee in this step
Polypropylene fibre is uniformly dispersed, and is first added to the water polypropylene fibre and sufficiently stirs scattered, adds mixing drum and stir together with concrete
Mix, advantage of this is that enable the polypropylene fibre with cracking resistance sufficiently in conjunction with the concrete of preparation so that
The crack resistance of mixed concrete is substantially improved, and such construction method has blending simple process, cheap, has excellent performance
The advantages that, there is stronger applicability without area jumpy in temperature.
It can be in one Ceng Tong circle of external coating of prefabricated cover board 5 before pouring concrete construction after in step 4 described in the present embodiment
Face agent, to increase the cohesive force of prefabricated cover board 5 and rear pouring concrete.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (7)
1. a kind of construction method of prefabricated superimposed sheet piece waterproof sealing, includes the following steps:
Step 1: the production of prefabricated superimposed sheet (1) and prefabricated cover board (5)；It is determined according to design drawing and national regulation prefabricated folded
The specific size and positioning of plywood (1) and prefabricated cover board (5) simultaneously carry out prefabricated construction；When the prefabricated superimposed sheet (1) is prefabricated,
Designated position is embedded with embedded bar (6), and setting is jagged above edge, and stitching portion is set as wedge shape structure (7)；Institute
State prefabricated cover board (5) it is prefabricated when, designated position is provided with reserved steel bar perforation (6-1) and reserved bolt penetration hole (2-1), two
Side edge shape is mutually agreed with the notch geometry above the edge of prefabricated superimposed sheet (1)；It is supported in time after prefabricated construction
Nurse makees, and regularly schedules special messenger and check maintenance quality；
Step 2: the prefabricated production to bolt component (2) are worn；It is determined according to design drawing and national regulation prefabricated to wearing bolt structure
The specific size of part (2) is simultaneously made；
Step 3: the installation of prefabricated superimposed sheet (1)；Special messenger's supervision is arranged when the live prefabricated superimposed sheet of handling (1), it is ensured that lifted
Prefabricated superimposed sheet (1) is not damaged in journey, by the stitching portion of the stitching portion of prefabricated superimposed sheet (1) and contiguous prefabricated superimposed sheet (1)
Spliced, it is prefabricated to wearing bolt component (2) in two pieces of prefabricated superimposed sheet (1) edge joint positions installations, while ensure two pieces it is prefabricated folded
Plywood (1) height difference is in the reasonable scope；After installing, in the edge joint position of two pieces of prefabricated superimposed sheets (1) and to wearing bolt component
(2) gap filler (3) are inserted at the gap of prefabricated superimposed sheet；
Step 4: the installation of prefabricated cover board (5) and the construction of rear pouring concrete；By prefabricated cover board (5) be mounted on two pieces it is prefabricated folded
Above plywood (1) edge joint position, by embedded bar (6) and prefabricated to wearing the screw rod of bolt component (2) respectively from reserved steel bar perforation
Be pierced by (6-1) and reserved bolt penetration hole (2-1), at the same ensure prefabricated cover board (5) upper surface and two pieces of prefabricated superimposed sheets (1)
Upper level it is consistent；Using nut (4) by prefabricated to wearing bolt component (2) for prefabricated cover board (5) and prefabricated superimposed sheet
(1) it is fixed；Gap and prefabricated cover board (5) between prefabricated cover board (5) and prefabricated superimposed sheet (1) and prefabricated to wearing spiral shell
Gap filler (3) are inserted at gap between bolt member (2)；Finally bind the steel above prefabricated superimposed sheet (1) and prefabricated cover board (5)
Pouring concrete is constructed after muscle and progress；Notice that coarse-fine aggregate quality should meet " concrete structure when pouring concrete mix after described
Engineering construction specification " GB50666-2011 requirement, cobble-stone diameter should control the concrete grade in layout design and accordingly standardize
It is required that cobble-stone diameter within the scope of, stone clay content need to be controlled 1% hereinafter, sand clay content need to be controlled 2% hereinafter, ratio of mud control
System 0.38 hereinafter, sand coarse aggregate ratio control is 50%, wherein when preparing the rear pouring concrete of prefabricated superimposed sheet (1) edge joint position, upper
State the polypropylene fibre, swelling agent and water-reducing agent that 5% parameter is added on the basis of concrete；Afterwards pouring concrete pour finish it is laggard
Row is secondary to vibrate and manually plasters, and then carries out maintenance work.
2. a kind of construction method of prefabricated superimposed sheet piece waterproof sealing according to claim 1, it is characterised in that: the step
When making prefabricated cover board (5) in rapid one, its quality is guaranteed using the measure of film covering after its concrete final set.
3. a kind of construction method of prefabricated superimposed sheet piece waterproof sealing according to claim 1, it is characterised in that: the step
Rapid three and step 4 in gap filler (3) be the weather-proof structural silicone adhesive for mixing appropriate swelling agent.
4. a kind of construction method of prefabricated superimposed sheet piece waterproof sealing according to claim 1, it is characterised in that: the step
The height difference of two pieces of prefabricated superimposed sheets (1) is within 10mm in rapid three.
5. a kind of construction method of prefabricated superimposed sheet piece waterproof sealing according to claim 1, it is characterised in that: the step
When polypropylene fibre being added in rapid four, to guarantee that polypropylene fibre is uniformly dispersed, first polypropylene fibre is added to the water and is sufficiently stirred
It dissipates, adds mixing drum and stirred together with concrete.
6. a kind of construction method of prefabricated superimposed sheet piece waterproof sealing according to claim 1, it is characterised in that: the step
The maintenance method of pouring concrete using watering or takes film covering curing after in rapid four.
7. a kind of construction method of prefabricated superimposed sheet piece waterproof sealing according to claim 1, it is characterised in that: the step
It can be in one layer of concrete interfacial agents of external coating of prefabricated cover board (5), to increase prefabricated cover board (5) before pouring concrete construction after in rapid four
With the cohesive force of rear pouring concrete.
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| CN201710472499.XA CN107288227B (en) | 2017-06-21 | 2017-06-21 | A kind of construction method of prefabricated superimposed sheet piece waterproof sealing |
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| CN201710472499.XA CN107288227B (en) | 2017-06-21 | 2017-06-21 | A kind of construction method of prefabricated superimposed sheet piece waterproof sealing |
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| CN107288227B true CN107288227B (en) | 2019-03-12 |
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| CN109025288B (en) * | 2018-07-23 | 2020-11-03 | 浙江正立高科建设有限公司 | Construction method of prestressed concrete double-T plate |
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| CN111775276A (en) * | 2019-04-06 | 2020-10-16 | 广州振中建设有限公司 | Construction method for connecting water leakage prevention precast slabs |
| CN111042350A (en) * | 2019-12-25 | 2020-04-21 | 永铭集团有限公司 | Anti-crack construction method for plastering layers on different interfaces of building outer wall |
| CN112267570A (en) * | 2020-11-11 | 2021-01-26 | 吉林建筑科技学院 | Prefabricated section steel concrete column and sandwich concrete composite plate node and construction method |
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| CN2234470Y (en) * | 1995-06-15 | 1996-09-04 | 池万清 | Concrete filter slab joint structure |
| KR100879160B1 (en) * | 2008-09-05 | 2009-01-19 | (주)하이로드 | Expansion joint for underground driveways |
| CN201671191U (en) * | 2010-05-20 | 2010-12-15 | 云南工程建设总承包公司 | Flexible concrete connection and water stop treatment structure |
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| Publication number | Publication date |
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| CN107288227A (en) | 2017-10-24 |
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