CN109083413A - A kind of overlapping arch shell structure construction method - Google Patents
A kind of overlapping arch shell structure construction method Download PDFInfo
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- CN109083413A CN109083413A CN201810982806.3A CN201810982806A CN109083413A CN 109083413 A CN109083413 A CN 109083413A CN 201810982806 A CN201810982806 A CN 201810982806A CN 109083413 A CN109083413 A CN 109083413A
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- prefabricated
- semiarch
- arch
- shell structure
- overlapping
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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Abstract
The present invention provides a kind of construction methods for overlapping arch shell structure, the overlapping arch shell structure is made of pre-erection and cast-in-place part, and the construction method of the overlapping arch shell structure is made of component factory production prefabricated unit, construction site assembly prefabricated unit and construction site casting concrete three phases.The production of prefabricated unit is carried out in component factory first, then prefabricated unit is transported to construction site, after the intensity of cast-in-place skewback reaches design value, assembled formation pre-erection is carried out to prefabricated unit at the construction field (site), the prefabricated unit is half arch structure, including left prefabricated semiarch and right prefabricated semiarch, three-hinged arch structure is formed by assembly, three-hinged arch structure, which is mounted on skewback, forms pre-erection, cast-in-place concrete finally is carried out in the top of pre-erection, forms the overlapping arch shell structure of fixed arch form.Present invention eliminates the heavy formwork work in scene, improve construction efficiency, prefabricated board precision is high, and appearance is good, it is easy to accomplish the sensory effects of clear-water concrete.
Description
Technical field
The present invention relates to a kind of construction method, in particular to a kind of overlapping encircles shell construction method.
Background technique
It is well known that the form of arch structure is varied, be conducive to the shape of abundant building, arch structure is applicable in span scope
It is extremely wide, it is not only suitable for longspan structure, is also applied for the building construction of medium and small span, is widely used in various the public of spaciousness and builds
It builds in the top board structure of object, such as subway station, exhibition center, gymnasium, market.Construction for the top board structure of these buildings
Cheng Zhong mostly uses greatly cast in situs method in the prior art, by carrying out template erection at the scene, then arranges inside template
Reinforcing bar, last casting concrete form arch structure.This form of construction work good integrity, but in the arch structure construction for carrying out large span
When, the installation formwork workload that scene needs to carry out falsework on floor is too big, and work difficulty is high, and striking time is long.
Therefore a kind of arch construction method for constructing convenient, work efficiency is high is needed to be applied to large-span arch structure construction construction
In method, to solve the problems, such as that prior art heavy workload, work difficulty are high, the construction time is long.
Summary of the invention
It is an object of the invention to propose a kind of overlapping arch shell structure construction method, to solve the prior art in Large Span Structure of Arch
The problem that existing heavy workload, work difficulty are high when structure construction, the construction time is long.
To achieve the goals above, the present invention proposes a kind of overlapping arch shell structure construction method, includes the following steps:
S1: the prefabricated unit of arch is produced；
S2: the skewback for installing the prefabricated unit is poured；
S3: the prefabricated unit is installed on the skewback；
S4: it connects the prefabricated unit and forms pre-erection
S5: the casting concrete above the pre-erection forms the overlapping arch shell structure.
Optionally, in the S1, the prefabricated unit is three-hinged arch structure, and the three-hinged arch structure includes left prefabricated semiarch
With right prefabricated semiarch；
The S3 step specifically includes:
S31: the assembled prefabricated semiarch in a left side and the prefabricated semiarch in the right side form the prefabricated unit；
S32: the prefabricated unit is installed on the skewback.
Optionally, the prefabricated semiarch in a left side and the prefabricated semiarch in the right side are symmetrical structure.
Optionally, the prefabricated semiarch in a left side and the prefabricated semiarch in the right side are articulated and connected by a vault node.
Optionally, the prefabricated semiarch in the left side and the prefabricated semiarch in the right side and the skewback pass through two corner of arch realities respectively
Now it is articulated and connected.
Optionally, the prefabricated semiarch in a left side is that multiple and quantity is equal with the quantity of the prefabricated semiarch in the right side.
Optionally, the prefabricated semiarch in a left side is identical as the size of the prefabricated semiarch in the right side.
Optionally, laterally attached between multiple prefabricated units, and there are gaps, and a seam is installed in the gap
Gap template, the gap template connect the reserved steel bar in the gap and gap are perfused in the gap and mix after being installed
For solidifying soil to realize the rigid connection between the prefabricated unit, multiple prefabricated units are laterally attached to form the overlapping arch shell
The pre-erection of structure, the pre-erection include two sides, and there are a changes between two sides and the building of construction
Shape seam is for preventing junction from generating crack.
Optionally, the S5 is specifically included:
S51: reinforcing bar binding is carried out to the pre-erection；
S52: after the completion of reinforcing bar binding, using the pre-erection as bed die, cast-in-place concrete operation is carried out on it.
Optionally, it realizes and is rigidly connected with casting concrete at the corner of arch at the vault node, the overlapping
Gong Ke mechanism is hingeless arch structure.
The present invention provides a kind of overlapping arch shell structure construction method, the overlapping arch shell is by pre-erection and cast-in-place part
Composition, the overlapping arch shell construction method is by production prefabricated unit, on-site consolidation prefabricated unit and poured in place concrete three
Stage composition.First in the production for carrying out prefabricated unit, prefabricated unit is then transported to by construction site by means of transportation,
After the intensity of cast-in-place skewback reaches design value, assembled formation pre-erection is carried out to prefabricated unit at the construction field (site), then pre-
The top of part processed carries out cast-in-place concrete, eventually forms overlapping arch shell structure, completes entire construction process.Present invention eliminates
The heavy formwork work in scene, improves construction efficiency, prefabricated board precision is high, and appearance is good, it is easy to accomplish the sense of clear-water concrete
Official's effect.
Detailed description of the invention
Fig. 1 is a kind of overlapping arch shell structure schematic diagram provided in this embodiment；
Fig. 2 is pre-erection plan view；
Fig. 3 is the structural schematic diagram of prefabricated unit；
Fig. 4 is overlapping arch shell structure schematic diagram；
Fig. 5 is the sectional schematic diagram of prefabricated semiarch；
Fig. 6 is the schematic top plan view of prefabricated semiarch；
Fig. 7 is the formwork for placing of prefabricated semiarch；
Fig. 8 is the sectional schematic diagram of prefabricated semiarch formwork for placing；
Fig. 9 is the travel position schematic diagram of prefabricated semiarch；
Figure 10 is building-site plan view；
Figure 11 is the building site unloading schematic diagram of prefabricated semiarch；
Figure 12-Figure 16 is on-site consolidation step schematic diagram；
Figure 17 is the connection of No.1 prefabricated unit and construction site structure；
Figure 18 is that frame transports all-in-one machine empty wagons return assembling area's schematic diagram；
Figure 19 is the assembled schematic diagram for completing whole prefabricated units；
Figure 20 is laterally attached between prefabricated unit；
Figure 21 is the connection of last block prefabricated unit and construction site structure；
Figure 22 is the schematic diagram of assembling reinforcement net；
Figure 23 is the schematic diagram of cast-in-place concrete；
The ground 1- wall, 2- skewback, floor in 3-, the cast-in-place part 4-, 5- pre-erection, 6- No.1 prefabricated unit, 7- bis- pre-
Unit processed, No. tri- prefabricated units of 8-, No. tetra- prefabricated units of 9-, last block prefabricated unit of 10-, 11- corner of arch, 12- are left pre-
Semiarch processed, 13- vault node, the right prefabricated semiarch of 14-, 15- overlapping arch shell structure, the deep floor of the prefabricated semiarch of 16-, 17- are pre-
The bottom plate of semiarch processed, the lifting lug of the prefabricated semiarch of 18-, the end mould of the prefabricated semiarch of 19-, the bed die of the prefabricated semiarch of 20-, 21- prefabricated half
Arch rib plate side form, the side form of the prefabricated semiarch bottom plate of 22-, the bracket of the prefabricated semiarch template of 23-, 24- transport support, 25- transport vehicle
, 26- No.1 end well, 27- precast assembly initial position, 28- deformation joint packing material, 29- crane, 30- ground support,
31- assembles area, No. bis- end wells of 32-, and 33- frame transports all-in-one machine, 34- unloading wirerope, and 35- rejects wirerope, 36- foundation pit branch
Support, 37- dowel, 38- prefabricated unit lateral reinforcement, the gap 39- template mounting groove, the gap 40- template, the gap 41- concrete,
42- deformation joint, the construction site 43- structure, the steel mesh of the cast-in-place part 44-.
Specific embodiment
A kind of overlapping arch shell structure construction method proposed by the present invention is made into one below in conjunction with the drawings and specific embodiments
Step is described in detail.According to following explanation and claims, advantages and features of the invention will be become apparent from.It should be noted that attached
Figure is all made of very simplified form and using non-accurate ratio, only to convenient, lucidly the aid illustration present invention is real
Apply the purpose of example.
Fig. 1 to Figure 22 is a kind of schematic diagram for overlapping arch shell structure construction method that the present embodiment proposes, key step has:
S1: in plant produced prefabricated unit, the prefabricated unit is then transported to building site, while building-site pours arch
Seat, the prefabricated unit quantity be it is multiple, the prefabricated unit is made of prefabricated semiarch.
S2: after the intensity of the skewback reaches design value, the multiple prefabricated unit is assembled into on-site prefabricated
Part 5.
S3: the casting concrete above the pre-erection 5, formed overlapping arch shell structure, the overlapping arch shell structure by
Pre-erection 5 and cast-in-place part 4 form.
In the present embodiment, the prefabricated unit uses three-hinged arch structure, as shown in figure 3, by left prefabricated semiarch 12,2
Corner of arch 11, right prefabricated semiarch 14 and 1 vault node 13 form.The size of all prefabricated semiarch is identical, at arch springing, leads to
It crosses corner of arch 11 and skewback 2 forms hinge joint, at vault, by vault node 13 in left prefabricated semiarch 12 and right prefabricated half
Articulated connection is formed between arch 14.
The skewback for overlapping arch shell structure is reinforced concrete structure, and cast in situs is completed, as shown in Figure 8.Skewback 2 is vertical
Upper to be connected with ground wall 1, lower part is connected with middle floor 7.Skewback 2 is in the plane along the elongated arrangement of station longitudinal axis.Armored concrete
Skewback is completed cast-in-place and reaches design strength, and on-site consolidation prefabricated component operation can be just carried out.
Prefabricated semiarch section is as shown in figure 5, the deep floor 16 of two prefabricated semiarch is located at top, left and right pair in Fig. 5
Claim distribution, the bottom plate 17 of prefabricated semiarch is rectangle, and the section of the deep floor 16 of prefabricated semiarch is also rectangle, and prefabricated semiarch is hung
Ear 18 is located at the top of the deep floor 16 of prefabricated semiarch.Prefabricated unit lateral reinforcement 38 is provided in the left and right side of bottom plate
With gap template mounting groove 39.
The suspension centre of prefabricated semiarch is made of embedded bar, and embedded bar is connect with the reinforcing bar of prefabricated semiarch.Prefabricated semiarch
Top view as shown in fig. 6, prefabricated semiarch deep floor 16 along prefabricated semiarch the elongated arrangement in span direction.Prefabricated unit is lateral
Reinforcing bar 38 is evenly arranged along the span direction of prefabricated semiarch.It should be noted that the suspension centre of prefabricated semiarch has 4, every adds
2 are arranged on strong floor.Inventor has found that the distance of each suspension centre and proximal end is span in Practical Project practice
0.207 times.
Optionally, the prefabricated semiarch can make in concrete component factory, be poured using horizontal mode, as shown in fig. 7,
When prefabricated, plate device only has the bed die 20 of prefabricated semiarch, the side form 22 of prefabricated semiarch bottom plate, prefabricated 21 and of semiarch floor side form
The end mould 19 of prefabricated semiarch, without backform.The end mould 19 of prefabricated semiarch is located at two sides, positioning accuracy and dimensional accuracy highest.
The cross-section diagram of template is as shown in Figure 8.The bed die 20 of the prefabricated semiarch is located at bottom, the side form 22 of the prefabricated semiarch bottom plate
Positioned at the two sides of bottom plate, the prefabricated semiarch floor side form 21 is located at the two sides of floor.Prefabricated semiarch completes maintenance in factory
Afterwards, it is transported by haulage vehicle to building site, as shown in Figure 9.Horizontal transport can be used in prefabricated semiarch, is placed on transport support 24,
Transport support 24 is placed on haulage vehicle 25, and per car only transports 1 piece of prefabricated semiarch, and the following table of arch is face-down, and floor is located at upper
The span direction in portion, arch is consistent with the length direction of haulage vehicle 25.
Building-site plane of arrangement figure is as shown in Figure 10.Assembled initial position 27 is close to No.1 end well as seen from Figure 10
26, and area 31 is assembled close to No. two end wells 32.Crane 29, ground support 30 and haulage vehicle 25 are respectively positioned on close to No. two ends
On the ground of well 32.Frame fortune all-in-one machine 33 can be moved in middle floor 3 along station longitudinal axis.It should be noted that assembling
When, frame transports all-in-one machine 33 and is located at assembling area 31.
The unladen state of prefabricated semiarch is as shown in figure 11, will be prefabricated by the way of being hung using 4 points using unloading wirerope 34
Semiarch is sling from haulage vehicle and is placed on the bracket 30 on building site ground, and placement status is identical as travel position.Its
In, the equal length of 4 unloadings wirerope 34.
What is and then carried out after the completion of unloading is exactly the assembly of pre-erection, and the horizontal layout of the pre-erection 5 is such as
Shown in Fig. 2, the pre-erection 5 has 8, No. four prefabricated units of prefabricated unit of prefabricated unit 7, three of No.1 prefabricated unit 6, two
9, until the last one prefabricated unit 10 arrangement is formed.No.1 prefabricated unit 6 is located at assembled section start 33, then prefabricated in No.1
Assembled No. two prefabricated units 7 at unit 6, at No. two prefabricated units 7 assembled No. three prefabricated units 8, at No. three prefabricated units 8
Assembled No. four prefabricated units 9, until the last one prefabricated unit assembly is completed.In the present embodiment, the size of all prefabricated units
It is identical.It should be noted that in addition to first prefabricated unit and the last one prefabricated unit, every piece of prefabricated unit with it is adjacent
It is laterally attached that prefabricated unit carries out rigidity, so that all prefabricated units become whole, forms the pre-erection of overlapping arch shell.It is logical
The reserved steel bar of connection prefabricated unit two sides is crossed, gap template is installed, perfusion gap concrete is realized rigid between prefabricated unit
Property connection；Final all prefabricated units form pre-erection.Concrete has shrinkage phenomenon after pouring, in order to avoid length compared with
Big cast-in-place concrete shrinks crack, the gap between first prefabricated unit and construction site structure as deformation joint,
Gap between the last one prefabricated unit and construction site structure is as deformation joint.
Specific assembly process is as follows:
Step 1: as shown in figure 12, rejecting wirerope 35 using 4, building site ground being located at by the way of hanging using 4 points
The prefabricated semiarch of bracket 30 is sling to aerial；It rejects steel cable for 4 and is divided into two groups, every group 2.Rope capacity is equal in every group,
The rope capacity of difference group differs.It should be noted that in the construction process, this four rope capacities are preferably adjustable
, so that prefabricated semiarch obtains optimal placed angle, or placed angle needed for precomputing prefabricated semiarch selects
The length of two groups of wirerope.
Step 2: rejecting left prefabricated semiarch 12 to the frame fortune all-in-one machine 33 being located in station on floor 3, positioning is completed
Afterwards, the prefabricated semiarch 12 in the left side is fixed temporarily on frame fortune all-in-one machine 33, as shown in figure 13.
Step 3: right prefabricated semiarch 20 is rejected to the corresponding position on frame fortune all-in-one machine 33, positioning in the manner described above
After the completion, the prefabricated semiarch 20 in the right side is temporarily fixed on frame fortune all-in-one machine 33, as shown in figure 14.
Step 4: as shown in figure 15, frame transports all-in-one machine 33 from assembling area 31s (Figure 15 dotted line position), along the vertical of station
Axis is mobile, by No.1 prefabricated unit 6 from the transport of assembling area 31 to precast assembly initial position 27.
Step 5: frame fortune all-in-one machine 33 adjusts No.1 prefabricated unit 6 to design posture, arch springing and vault node are then carried out
Processing is completed after-frame fortune all-in-one machine 33 and is unloaded, and No.1 prefabricated unit 6 falls frame on skewback 2, as shown in figure 16.
Step 6: as shown in figure 18, frame fortune all-in-one machine 33 indulges contour along station (shown in dotted line) from No.1 prefabricated unit 6
Empty wagons is back at assembling area 31 (shown in solid), is ready for the assembly of No. two prefabricated units 7.
It repeats the above steps, is sequentially completed the prefabricated unit 9 of prefabricated unit 8, four of No. two prefabricated units 7, three, until most
The on-site consolidation of latter piece of prefabricated unit 10, as shown in figure 19.
As shown in figure 21, it is distributed in and deformation is perfused the deformation joint 42 between No.1 prefabricated unit and construction site structure 43 Nei
Packing material 28 is stitched, perfusion deformation joint is filled out in the deformation joint 42 between last block prefabricated unit 16 and construction site structure 43
Fill material 28.It should be noted that deformation joint packing material described in the present embodiment can be the waterproof materials such as silk fiber crops or pitch,
It is not limited here.
Laterally attached as shown in figure 20 between prefabricated unit, No. two prefabricated units 7 pass through prefabricated unit lateral reinforcement 38
Realized respectively with the No.1 prefabricated unit 6 of two sides and No. three prefabricated units 8 it is laterally attached, then the two of No. two prefabricated units 7
Gap template 40 is installed in latasuture gap, finally needs that gap concrete 41 is perfused in above-mentioned gap, with realize prefabricated unit it
Between rigid connection.
Finally, after completing the assembly of whole prefabricated units, construction personnel, which can stand, to complete and is formed whole pre- assembled
The binding skewback of the steel mesh 44 of cast-in-place structural is carried out on part 5 processed, as shown in figure 22.Reinforcing bar binding includes the reinforcing bar at arch springing
It is connected, the reinforcing bar at vault is connected and the generally longitudinally connection of reinforcing bar；
After the completion of reinforcing bar binding, it is bed die with the assembled pre-erection 5 completed, carries out cast-in-place concrete work on it
Industry forms the cast-in-place part 4 of overlapping arch shell structure.It should be noted that concreting should be segmented, symmetrically pour, such as schemes
Shown in 23.
Optionally, after the intensity of the cast-in-place concrete reaches design value, construction of waterproof layer can be carried out in surface on it.
In conclusion the overlapping arch shell is by pre-erection the present invention provides a kind of overlapping arch shell structure construction method
It is formed with cast-in-place part, the overlapping arch shell construction method is by production prefabricated unit, on-site consolidation prefabricated unit and cast in situs
Concrete three phases composition.First in the production for carrying out prefabricated unit, then prefabricated unit is transported to by means of transportation
Construction site carries out the assembled prefabricated portion of formation to prefabricated unit at the construction field (site) after the intensity of cast-in-place skewback reaches design value
Point, then by above-mentioned pre-erection AT STATION in transport make and installing to arch to be installed, finally in the upper of pre-erection
Fang Jinhang cast-in-place concrete forms overlapping arch shell structure, completes entire construction process.Present invention eliminates the heavy formworks in scene
Work improves construction efficiency, and prefabricated board precision is high, and appearance is good, it is easy to accomplish the sensory effects of clear-water concrete.
It should be noted last that foregoing description is only the description to present pre-ferred embodiments, not to model of the present invention
Any restriction enclosed, any change, the modification that the those of ordinary skill in field of the present invention does according to the disclosure above content, belongs to
The protection scope of claims.
Claims (10)
1. a kind of overlapping arch shell structure construction method, which comprises the steps of:
S1: the prefabricated unit of arch is produced；
S2: the skewback for installing the prefabricated unit is poured；
S3: the prefabricated unit is installed on the skewback；
S4: it connects the prefabricated unit and forms pre-erection；
S5: the casting concrete above the pre-erection forms the overlapping arch shell structure.
2. a kind of overlapping arch shell structure construction method as described in claim 1, which is characterized in that described prefabricated in the S1
Unit is three-hinged arch structure, and the three-hinged arch structure includes left prefabricated semiarch and right prefabricated semiarch；
The S3 step specifically includes:
S31: the assembled prefabricated semiarch in a left side and the prefabricated semiarch in the right side form the prefabricated unit；
S32: the prefabricated unit is installed on the skewback.
3. a kind of overlapping arch shell structure construction method as claimed in claim 2, which is characterized in that the prefabricated semiarch in the left side and institute
Stating right prefabricated semiarch is symmetrical structure.
4. a kind of overlapping arch shell structure construction method as claimed in claim 2, which is characterized in that the prefabricated semiarch in the left side and institute
It states right prefabricated semiarch and passes through a vault node articulated connection.
5. a kind of overlapping arch shell structure construction method as claimed in claim 2, which is characterized in that the prefabricated semiarch in the left side and institute
It states right prefabricated semiarch and the skewback passes through two corner of arch respectively and realizes articulated connection.
6. a kind of overlapping arch shell structure construction method as claimed in claim 2, which is characterized in that the prefabricated semiarch in the left side and institute
The quantity for stating right prefabricated semiarch is that multiple and quantity is equal.
7. a kind of overlapping arch shell structure construction method as claimed in claim 2, which is characterized in that the prefabricated semiarch in the left side and institute
The size for stating right prefabricated semiarch is identical.
8. a kind of overlapping arch shell structure construction method as claimed in claim 6, which is characterized in that multiple prefabricated units it
Between it is laterally attached, and there are gaps, and a gap template is installed in the gap, and the gap template connects after being installed
Simultaneously gap concrete is being perfused to realize the rigidity between the prefabricated unit in reserved steel bar in the gap in the gap
Connection, the laterally attached pre-erection for forming the overlapping arch shell structure of multiple prefabricated units, the pre-erection include
Two sides, there are a deformation joints for preventing junction from generating crack between two sides and the building of construction.
9. a kind of overlapping arch shell structure construction method as described in claim 1, which is characterized in that the S5 is specifically included:
S51: reinforcing bar binding is carried out to the pre-erection；
S52: after the completion of reinforcing bar binding, using the pre-erection as bed die, cast-in-place concrete operation is carried out on it.
10. a kind of overlapping arch shell structure construction method as claimed in claim 8, which is characterized in that at the vault node and
Casting concrete realizes rigid connection at the corner of arch, and the overlapping Gong Ke mechanism is hingeless arch structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810982806.3A CN109083413A (en) | 2018-08-27 | 2018-08-27 | A kind of overlapping arch shell structure construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810982806.3A CN109083413A (en) | 2018-08-27 | 2018-08-27 | A kind of overlapping arch shell structure construction method |
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| CN109083413A true CN109083413A (en) | 2018-12-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111231103A (en) * | 2020-03-07 | 2020-06-05 | 上海市机械施工集团有限公司 | Method for improving assembling precision of prefabricated three-hinged arch |
| CN112196283A (en) * | 2020-09-25 | 2021-01-08 | 上海市机械施工集团有限公司 | Method for mounting steel roof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207348091U (en) * | 2017-09-26 | 2018-05-11 | 徐运博 | A kind of assembled pipe gallery |
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- 2018-08-27 CN CN201810982806.3A patent/CN109083413A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207348091U (en) * | 2017-09-26 | 2018-05-11 | 徐运博 | A kind of assembled pipe gallery |
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| 潘睿: "《房屋建筑学》", 31 August 2008 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111231103A (en) * | 2020-03-07 | 2020-06-05 | 上海市机械施工集团有限公司 | Method for improving assembling precision of prefabricated three-hinged arch |
| CN111231103B (en) * | 2020-03-07 | 2021-04-13 | 上海市机械施工集团有限公司 | Method for improving assembling precision of prefabricated three-hinged arch |
| CN112196283A (en) * | 2020-09-25 | 2021-01-08 | 上海市机械施工集团有限公司 | Method for mounting steel roof |
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Application publication date: 20181225 |
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