CN105332386A - Structure construction method for tower crane foundation serving as basement bottom plate - Google Patents
Structure construction method for tower crane foundation serving as basement bottom plate Download PDFInfo
- Publication number
- CN105332386A CN105332386A CN201410392950.3A CN201410392950A CN105332386A CN 105332386 A CN105332386 A CN 105332386A CN 201410392950 A CN201410392950 A CN 201410392950A CN 105332386 A CN105332386 A CN 105332386A
- Authority
- CN
- China
- Prior art keywords
- tower crane
- concrete
- sole plate
- basement bottom
- bottom board
- 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.)
- Granted
Links
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
Provided is a structure construction method for a tower crane foundation serving as a basement bottom plate. The method is characterized by comprising the following technical measures that a, a foundation bottom plate is poured; b, steel bars are reserved; c, a tower crane anchor bolt is treated; d, tower crane waterproofness treatment is carried out; e, grading gravel construction is carried out; f, steel bars are reserved in the top plate tower crane positions of the third floor underground and the second floor underground; g, construction joints are treated; and h, post-poured concrete is poured. The structure construction method for the tower crane foundation serving as the basement bottom plate has the beneficial effects that the construction scheme is worked out in advance, the construction process is simple and convenient, repeated construction is avoided, and project cost is reduced.
Description
Technical field
The present invention relates to a kind of concrete structure construction method, specifically, is the double construction method doing basement bottom board of a kind of tower crane.
Background technology
Tower crane plays an important role in construction work especially high-building construction, is most important vertical transportation machinery.So the Layout Design of tower crane is reasonable, compact, will construction safety be given, progress brings direct benefit, and secondary transhipment can be saved, cost-saving.The tower crane of current most of engineering adopts traditional pre-buried mode, and basement is all with by building main building usually, but tower crane can conflict with basement bottom board, cause construction inconvenience and this position bad will causing on underground water of process is oozed, tower crane is subject to much problems such as bubble.Because tower crane of the prior art is comparatively large, is positioned in the basement bottom board of building, often " fights " with base plate cushion cap foundation and cause inconvenience of constructing, therefore, industry also constantly explores the innovation way between tower crane and basement bottom board.
Chinese patent CN102677675A discloses a kind of tower crane in building basement and preparation method thereof on March 11st, 2011, wherein, in building basement, first dig out the hole of tower crane, then water by the mode of traditional casting reinforced concrete and outpour Cross Elastic Beam and at Cross Elastic Beam upper ejecting plate, simultaneously plate surrounding at least build-in one enclose watertight shutter, and then carry out building of basement bottom board by after muscle at the bottom of the base plate gluten of the pre-buried good basement bottom board of mode of tradition cast basement bottom board and base plate, watertight shutter can be made to be plugged in the basement bottom board of plate surrounding after gear pours basement bottom board, the tower crane of right-angled intersection beam and slab type steel concrete is made to be connected as a whole with basement bottom board.This method owing to constructing formerly by building basement, right latter made tower crane.Therefore, although this tower crane is connected as a whole with basement bottom board, say that it is still two independently structures from building structure, be all restricted from construction cost, time, structural strength, unfavorable factor shows especially.
Chinese patent CN102535505A discloses a kind of tower crane utilizing outer wall of basement and foundation pit supporting pile to do on July 4th, 2012, wherein by tower crane Bo plate, the wherein side of tower crane Bo plate is taken and is placed on outer wall of basement, and is provided with outer wall of basement bar planting between tower crane Bo plate and outer wall of basement.This foundation construction method utilizes the existing structure of job site, although have the advantages that to reduce tower crane basement process link, but the secondary of tower crane construction drops into can not be exempted, but say that it is also two independently structures from building structure, cause foundation structure to repeat construction, increase construction cost.
Therefore known tower crane and the structure construction of basement bottom board also exist above-mentioned all inconvenience and problem.
Summary of the invention
Object of the present invention, is to propose a kind of double construction method doing basement bottom board of tower crane simultaneously considering to combine with sole plate in tower crane construction.
Another object of the present invention, is to propose a kind of construction technology easy, avoids repeating construction, saves the double construction method doing basement bottom board of tower crane of construction cost.
For achieving the above object, technical solution of the present invention is:
The double construction method doing basement bottom board of tower crane, is characterized in that comprising following technical measures:
A, sole plate are built
When sole plate is built, indwelling concrete secondary builds scope; Constuction joint way: the height in sole plate both sides reserves 50X100mm water stop slot to medium position 1/3 place, and arranges steel plate for sealing water at 2/3 place;
B, reinforcing bar indwelling
Sole plate beam steel wants elongated layout, when sole plate muscle meets tower crane counterweight and tower body, extend tower crane counterweight and tower body edge, meet lap length, the bridging method of tower crane counterweight and tower body position reinforcing bar is: in same component, the colligation lap joint of adjacent Reinforcement will stagger mutually; The length of reinforcing bar binding lap joint jointing is 1.3 times of lap length, i.e. 1.3UE, the lap joint that all lap joint mid points are positioned at this jointing length all belongs to same jointing, be positioned at the tensile reinforcement lap joint area percentage of same jointing: to beam class, plate class and wall class A of geometric unitA are <=25%;
The process of c, tower crane crab-bolt
After constructure body structure completion tower crane is removed, before the excision of tower crane crab-bolt, neighbouring concrete is rejected 50mm dell, excision crab-bolt, reject position and adopt 1:25 cement mortar floating;
D, tower crane waterproofing work
Rejected by fish tail and waterproof layer around former tower crane crab-bolt, layering and sole plate overlap, and its lap width is 160mm, and lap joint staggers 300mm mutually, builds 50mm thick C20 pea gravel concreten topping;
E, grating sandstone are constructed
When fish tail and waterproof layer intensity reaches designing requirement, graded sand and stone will be adopted to backfill with sole plate discrepancy in elevation scope; Back-filling in layers, adopts surface vibrator compaction in layers, is filled to lower than sole plate 100mm scope, builds C15 pea gravel concreten within the scope of its 100mm, serve as sole plate bed course;
F, F3/B3 and the top board tower crane position reinforcing bar indwelling of two layers, underground
The ater-casting HJD100% of national building standard atlas 04G101-4 concrete structure construction plan integral drawing method cartographic convention and constructional detail is adopted to overlap reserved steel bar structure: lapped length of steel bar is 920mm, and template construction is with top board ater-casting way;
The process of g, constuction joint
After form removable, concrete surface is picked hair, pick to concrete dense crucial point, in surrounding groove, elongated sealing rod is set, adopt steel nail to control the position of sealing rod;
H, rear pouring concrete are built
After the scope of watering clean out; After reinforcing bar binding completes, adopt high 1 strength grade sole plate concrete strength, namely ungauged regions C40P6 concrete is built.
The double construction method doing basement bottom board of tower crane of the present invention can also be further achieved by the following technical measures.
Aforesaid method, wherein said build concrete before conscientiously to clear up in opposite joint, pick cutter, wash away, the reinforcing bar of displacement will reset, and concrete must vibration compacting, and especially basement bottom board more should conscientiously process, and improves himself waterproof ability.
Aforesaid method, after wherein said tower crane first time builds and stay and establish, should take protective measure, top covers, and fence is protected, and prevents entering rubbish in seam, reinforcing bar pollutes, tramples distortion, brings difficulty to cleaning.
Aforesaid method, is in cantilever position before wherein said tower crane surrounding and the non-teeming concrete of sole plate for a long time, so can not remove at non-teeming front both sides shuttering supporting; after ater-casting is built, concrete strength reaches more than 85% and together removes; protection is noted, observed and recorded, timely maintenance after concrete placings.
Aforesaid method, the height of wherein said tower crane bearing platform is identical with the height of sole plate.
After adopting technique scheme, the double construction method doing basement bottom board of tower crane of the present invention has the following advantages:
1, carry out constructure scheme in advance, construction technology is easy;
2, avoid repeating construction, reduce engineering cost.
Accompanying drawing explanation
Fig. 1 is tower crane (tower crane bearing platform) structural representation of the embodiment of the present invention;
Fig. 2 be the embodiment of the present invention tower crane (tower crane bearing platform) waterproof measure and with base plate intersection organigram;
Fig. 3 is tower crane counterweight and the tower body position bar splicing schematic diagram of the embodiment of the present invention.
In figure: 1 raft plate bottom layer of the reinforcing steel, 2 tension ribs, 3 tower cranes, 4 raft plate surfacing steel bar, 5 steel plate for sealing water, 6C15 element concrete bed course, 7 water stop slots, 8 mass concrete inverts, 9 basement bottom boards.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is illustrated further.
Embodiment 1
The double construction method doing basement bottom board of tower crane of the present invention, is characterized in that comprising following technical measures:
A, sole plate are built
Now refer to Fig. 1 and Fig. 2, Fig. 1 is the tower-crane foundation structure schematic diagram of the embodiment of the present invention, Fig. 2 be the embodiment of the present invention tower crane waterproof measure and with base plate intersection organigram.
When sole plate is built, indwelling secondary builds scope; Constuction joint way: the height in sole plate both sides reserves 50X100mm water stop slot 7 to medium position 1/3 place, and arranges steel plate for sealing water 5 at 2/3 place, and specific practice is as post empiricism requirement; The height of described tower crane bearing platform is identical with the height of sole plate.
B, reinforcing bar indwelling
Fig. 3 is tower crane counterweight and the tower body position bar splicing schematic diagram of the embodiment of the present invention.
Sole plate beam steel wants elongated layout, when sole plate muscle meets tower crane counterweight and tower body, extend tower crane counterweight and tower body edge, meet lap length, (because tower crane counterweight and tower body need to remove, this engineering reinforcing bar is HRB400, can not repeatedly bend and weld) bridging method of tower crane counterweight and tower body position reinforcing bar is: in same component, the colligation lap joint of adjacent Reinforcement will stagger mutually.
The length of reinforcing bar binding lap joint jointing is 1.3 times of lap length, i.e. 1.3UE, the lap joint that all lap joint mid points are positioned at this jointing length all belongs to same jointing, be positioned at the tensile reinforcement lap joint area percentage of same jointing: to beam class, plate class and wall class A of geometric unitA are <=25%;
The process of c, tower crane crab-bolt
After major structure of construction completion tower crane is removed, before the excision of tower crane crab-bolt, neighbouring concrete is rejected 50mm dell, excision crab-bolt, reject position and adopt 1:25 cement mortar floating;
D, tower crane waterproofing work
Rejected by fish tail and waterproof layer around former tower crane crab-bolt, layering and sole plate overlap, and its lap width is 160mm, and lap joint staggers 300mm mutually, and build 50mm thick C20 pea gravel concreten topping, specific practice is see Fig. 2;
E, grating sandstone are constructed
When fish tail and waterproof layer intensity reaches designing requirement, graded sand and stone will be adopted to backfill with sole plate discrepancy in elevation scope; Back-filling in layers, adopts surface vibrator compaction in layers, is filled to lower than sole plate 100mm scope, builds C15 pea gravel concreten within the scope of its 100mm, serve as sole plate bed course;
F, F3/B3 and the top board tower crane position reinforcing bar indwelling of two layers, underground
Adopt national building standard atlas 04G101-4 concrete structure construction plan integral drawing method cartographic convention and constructional detail (cast-in-site concrete floor and roof panel) the 31st page of ater-casting HJD100% to overlap reserved steel bar to construct: lapped length of steel bar is 41d (d is bar diameter 14) X1.6(bar splicing coefficient) X1.4(roof steel bar diameter)=920mm, template construction is with top board ater-casting way;
The process of g, constuction joint
After form removable, concrete surface is picked hair, pick to concrete dense crucial point, in surrounding groove, elongated sealing rod is set, adopt steel nail to control the position of sealing rod;
H, rear pouring concrete are built
After the scope of watering clean out; Reinforcing bar binding completes, and after Party A, management acceptance(check), adopt high 1 strength grade sole plate concrete strength, ungauged regions C40P6 concrete is built.
In construction, points for attention are as follows:
(1) conscientiously will clear up in opposite joint before building concrete described in, pick cutter, wash away, the reinforcing bar of displacement will reset, and concrete must vibration compacting, and especially basement bottom board more should conscientiously process, and improves himself waterproof ability.
(2) the double construction method doing basement bottom board of tower crane as claimed in claim 1; it is characterized in that; after described tower crane first time builds and stays and establish; protective measure should be taked; top covers; fence is protected, and prevents entering rubbish in seam, reinforcing bar pollutes, tramples distortion, brings difficulty to cleaning.
(3) the double construction method doing basement bottom board of tower crane as claimed in claim 1; it is characterized in that; cantilever position is in for a long time before described tower crane surrounding and the non-teeming concrete of sole plate; so can not remove at non-teeming front both sides shuttering supporting; after ater-casting is built, concrete strength reaches more than 85% and together removes; protection is noted, observed and recorded, timely maintenance after concrete placings.
The present invention has substantive distinguishing features and significant technological progress, simultaneously the double construction method doing basement bottom board of tower crane of the present invention considers to combine with sole plate in tower crane construction, construction technology is easy, can ensure that tower crane is double and make sole plate, avoid repeating construction, save construction cost.
The double construction method doing basement bottom board of tower crane of the present invention is applied in Bangbu Tao Shan housing for survivor three phase one bid section engineering, gross floor area 223220.53 ㎡ in this project, key construction is made up of 14 building 21F-25F high residential buildings and annex thereof, 3 building 3F commercial buildings, overall 1F basement.Wherein air raid shelter there are 6 highrise buildings.The double construction method doing basement bottom board of tower crane of the present invention uses Be very effective, obtains exploiting entity, supervisor and Construction unit's abundant affirmation.
Above embodiment is used for illustrative purposes only, but not limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, can also make various conversion or change.Therefore, all equivalent technical schemes also should belong to category of the present invention, should be limited by each claim.
Claims (5)
1. the double construction method doing basement bottom board of tower crane, is characterized in that comprising following technical measures:
A, sole plate are built
When sole plate is built, indwelling concrete secondary builds scope; Constuction joint way: the height in sole plate both sides reserves 50X100mm water stop slot to medium position 1/3 place, and arranges steel plate for sealing water at 2/3 place;
B, reinforcing bar indwelling
Sole plate beam steel wants elongated layout, when sole plate muscle meets tower crane counterweight and tower body, extend tower crane counterweight and tower body edge, meet lap length, the bridging method of tower crane counterweight and tower body position reinforcing bar is: in same component, the colligation lap joint of adjacent Reinforcement will stagger mutually; The length of reinforcing bar binding lap joint jointing is 1.3 times of lap length, the lap joint that all lap joint mid points are positioned at this jointing length all belongs to same jointing, be positioned at the tensile reinforcement lap joint area percentage of same jointing: to beam class, plate class and wall class A of geometric unitA are <=25%;
The process of c, tower crane crab-bolt
After constructure body structure completion tower crane is removed, before the excision of tower crane crab-bolt, neighbouring concrete is rejected 50mm dell, excision crab-bolt, reject position and adopt 1:25 cement mortar floating;
D, tower crane waterproofing work
Rejected by fish tail and waterproof layer around former tower crane crab-bolt, layering and sole plate overlap, and its lap width is 160mm, and lap joint staggers 300mm mutually, builds 50mm thick C20 pea gravel concreten topping;
E, grating sandstone are constructed
When fish tail and waterproof layer intensity reaches designing requirement, graded sand and stone will be adopted to backfill with sole plate discrepancy in elevation scope; Back-filling in layers, adopts surface vibrator compaction in layers, is filled to lower than sole plate 100mm scope, builds C15 pea gravel concreten within the scope of its 100mm, serve as sole plate bed course;
F, F3/B3 and the top board tower crane position reinforcing bar indwelling of two layers, underground
The ater-casting HJD100% of national building standard atlas 04G101-4 concrete structure construction plan integral drawing method cartographic convention and constructional detail is adopted to overlap reserved steel bar structure: lapped length of steel bar is 920mm, and template construction is with top board ater-casting way;
The process of g, constuction joint
After form removable, concrete surface is picked hair, pick to concrete dense crucial point, in surrounding groove, elongated sealing rod is set, adopt steel nail to control the position of sealing rod;
H, rear pouring concrete are built
After the scope of watering clean out; After reinforcing bar binding completes, adopt high 1 strength grade sole plate concrete strength, namely ungauged regions C40P6 concrete is built.
2. the double construction method doing basement bottom board of tower crane as claimed in claim 1, it is characterized in that, described build concrete before conscientiously to clear up in opposite joint, pick cutter, wash away, the reinforcing bar of displacement will reset, concrete must vibration compacting, especially basement bottom board more should conscientiously process, and improves himself waterproof ability.
3. the double construction method doing basement bottom board of tower crane as claimed in claim 1; it is characterized in that; after described tower crane first time builds and stays and establish; protective measure should be taked; top covers; fence is protected, and prevents entering rubbish in seam, reinforcing bar pollutes, tramples distortion, brings difficulty to cleaning.
4. the double construction method doing basement bottom board of tower crane as claimed in claim 1; it is characterized in that; cantilever position is in for a long time before described tower crane surrounding and the non-teeming concrete of sole plate; so can not remove at non-teeming front both sides shuttering supporting; after ater-casting is built, concrete strength reaches more than 85% and together removes; protection is noted, observed and recorded, timely maintenance after concrete placings.
5. the double construction method doing basement bottom board of tower crane as claimed in claim 1, it is characterized in that, the height of described tower crane is identical with the height of basement bottom board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410392950.3A CN105332386B (en) | 2014-08-12 | 2014-08-12 | Structure construction method for tower crane foundation serving as basement bottom plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410392950.3A CN105332386B (en) | 2014-08-12 | 2014-08-12 | Structure construction method for tower crane foundation serving as basement bottom plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105332386A true CN105332386A (en) | 2016-02-17 |
| CN105332386B CN105332386B (en) | 2017-04-19 |
Family
ID=55283129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410392950.3A Active CN105332386B (en) | 2014-08-12 | 2014-08-12 | Structure construction method for tower crane foundation serving as basement bottom plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105332386B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105649103A (en) * | 2016-03-24 | 2016-06-08 | 广西建工集团第五建筑工程有限责任公司 | Pile-beam structure integrated tower crane foundation structure and construction method thereof |
| CN106639003A (en) * | 2016-12-29 | 2017-05-10 | 上海市政工程设计研究总院（集团）有限公司 | Reinforced concrete member post-cast strip and construction method of same |
| CN108385710A (en) * | 2018-04-04 | 2018-08-10 | 温州伊诺韦特科技有限公司 | A kind of reusable column foot and its installation method |
| CN109137955A (en) * | 2018-09-29 | 2019-01-04 | 上海建工建集团有限公司 | A kind of shear reinforcement and its construction method of sole plate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078219A (en) * | 2007-06-14 | 2007-11-28 | 苏州二建建筑集团有限公司 | Tower crane foundation for construction and manufacturing method thereof |
| RU2371373C1 (en) * | 2008-04-02 | 2009-10-27 | Общество с ограниченной ответственностью "Конструкторско-технологический институт КТИ-155" | Method to transfer tower crane from lengthwise to crosswise track and running gear of tower crane to this end |
| CN103174135A (en) * | 2011-12-23 | 2013-06-26 | 五冶集团上海有限公司 | Repair method of unqualified post-grouting bored concrete pile |
| CN103882858A (en) * | 2012-12-19 | 2014-06-25 | 五冶集团上海有限公司 | Construction method of micro-piles with diameter of 300 mm |
-
2014
- 2014-08-12 CN CN201410392950.3A patent/CN105332386B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078219A (en) * | 2007-06-14 | 2007-11-28 | 苏州二建建筑集团有限公司 | Tower crane foundation for construction and manufacturing method thereof |
| RU2371373C1 (en) * | 2008-04-02 | 2009-10-27 | Общество с ограниченной ответственностью "Конструкторско-технологический институт КТИ-155" | Method to transfer tower crane from lengthwise to crosswise track and running gear of tower crane to this end |
| CN103174135A (en) * | 2011-12-23 | 2013-06-26 | 五冶集团上海有限公司 | Repair method of unqualified post-grouting bored concrete pile |
| CN103882858A (en) * | 2012-12-19 | 2014-06-25 | 五冶集团上海有限公司 | Construction method of micro-piles with diameter of 300 mm |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105649103A (en) * | 2016-03-24 | 2016-06-08 | 广西建工集团第五建筑工程有限责任公司 | Pile-beam structure integrated tower crane foundation structure and construction method thereof |
| CN106639003A (en) * | 2016-12-29 | 2017-05-10 | 上海市政工程设计研究总院（集团）有限公司 | Reinforced concrete member post-cast strip and construction method of same |
| CN108385710A (en) * | 2018-04-04 | 2018-08-10 | 温州伊诺韦特科技有限公司 | A kind of reusable column foot and its installation method |
| CN108385710B (en) * | 2018-04-04 | 2020-03-13 | 温州伊诺韦特科技有限公司 | Reusable tower foundation and installation method thereof |
| CN109137955A (en) * | 2018-09-29 | 2019-01-04 | 上海建工建集团有限公司 | A kind of shear reinforcement and its construction method of sole plate |
| CN109137955B (en) * | 2018-09-29 | 2023-10-13 | 上海建工一建集团有限公司 | Shear steel bar of foundation slab and construction method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105332386B (en) | 2017-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107313517B (en) | Connecting node for laminated wall and laminated floor slab in middle layer | |
| CN107975059A (en) | A kind of assembled pile foundation wharfs structure and its construction method | |
| CN205576955U (en) | Raft foundation's reinforced structure is displaced into to strip footing | |
| CN205894281U (en) | Integral basement of coincide assembly of arch without beam system | |
| CN103953114B (en) | Steel frame-reinforced masonry shear wall combinative structure and construction method thereof | |
| CN104060781A (en) | Cast-in-situ cranked slab stair without seams at stair sections and construction method | |
| CN204343339U (en) | A kind of temporary support columns waterproof base plate | |
| JP2019521267A (en) | Reverse tenon building structure and technology process to withstand earthquakes, strong winds and tsunamis | |
| CN103161176B (en) | Tower crane foundation construction method in main building disjunctor garage | |
| CN104790436B (en) | Basement in high rise building top board pouring after settlement advance water stop construction method | |
| CN105332386A (en) | Structure construction method for tower crane foundation serving as basement bottom plate | |
| CN106351331A (en) | Multi-floor basement reverse and normal combined construction process | |
| CN203821591U (en) | Steel frame-reinforcement brickwork shear wall combined structure | |
| CN106869548A (en) | A kind of newel framework assembled underground parking structural system and construction method | |
| CN109648696A (en) | Side slope precast lattice beam of reinforcing bar connection and preparation method thereof and construction method | |
| CN109208632A (en) | A kind of precast hollow module block type concrete retaining wall | |
| CN106121035A (en) | A kind of overlapping assembled integral basement of flat slab system | |
| CN206015953U (en) | Honeycomb structure blockwork | |
| CN106164380A (en) | Wind-driven generator fabricated base | |
| CN106284653B (en) | A kind of construction method that balcony construct capital interspaces in advance | |
| CN103215950B (en) | Pile foundation extension construction method in backfilling area | |
| CN203684457U (en) | Light assembled shear wall structure | |
| CN107268675A (en) | Laying method and structure of combined multi-bin underground comprehensive pipe gallery | |
| CN203905331U (en) | Cast-in-place plate-type staircase with seamless steps | |
| CN205669211U (en) | A kind of prefabricated Gravity Retaining Wall |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |