CN108086777A - A kind of segmented steel pipe framework structure and its installation method - Google Patents
A kind of segmented steel pipe framework structure and its installation method Download PDFInfo
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- CN108086777A CN108086777A CN201711386669.9A CN201711386669A CN108086777A CN 108086777 A CN108086777 A CN 108086777A CN 201711386669 A CN201711386669 A CN 201711386669A CN 108086777 A CN108086777 A CN 108086777A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 313
- 239000010959 steel Substances 0.000 title claims abstract description 313
- 238000009434 installation Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000010276 construction Methods 0.000 claims abstract description 20
- 238000011900 installation process Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims 1
- 239000010410 layer Substances 0.000 description 41
- 238000010586 diagram Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009408 flooring Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/08—Structures made of specified materials of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a kind of segmented steel pipe framework structure, including：Steel pipe column fixes girder steel, floor girder steel and chooses girder steel, and the steel pipe column is vertically arranged on column foot, and fixed girder steel is provided between the steel pipe column, and floor girder steel is provided on the outside of the steel pipe column, is provided on the outside of the floor girder steel and chooses girder steel；The fixed girder steel, floor girder steel and choose girder steel and be horizontally disposed with；The floor girder steel is divided into bright layer girder steel and blindstory girder steel, states layer girder steel clearly and blindstory girder steel is arranged at intervals；The invention also discloses a kind of installation methods of segmented steel pipe framework structure.Tower body is divided into multistage construction, reduces the weight of single steel, reduce difficulty of construction by its method constructed by using segmented；The toughness of the construction method of segmented and steel itself can provide good toughness for ancient tower simultaneously, so as to obtain outstanding wind loading rating, add security performance.
Description
Technical field
The invention belongs to building engineering field, more particularly to a kind of segmented steel pipe framework structure and its installation method.
Background technology
The big Bao en Temple in capital is China's the longest vihara in history, is monastery largest, with a highest standard, is
First of hundred temples.Big Bao en Temple coloured glaze pagoda is always the highest building of China and world architecture miracle, is destroyed in the flames of war unfortunately.
Therefore, the application is made that a series of research with regard to how to rebuild big Bao en Temple coloured glaze pagoda.
Big Bao en Temple underground palace newly protects tower as nine layers on the ground.According to ancient turriform system, from third layer, per it is high layer by layer by down toward
On successively decrease.12.1 meters of bottom floor height；Two is 3.9 meters high layer by layer；Three layers to eight layers, floor height successively decreases from 7.5 meters to 6.6 meters, and wherein
It is 3.315 meters that every layer, which is all provided with height,（Including thickness containing up-down structure）Blindstory, to install various kinds of equipment；Building top
It it is nine layers from 64.700 meters of absolute altitudes to 84.377 meters of absolute altitudes, space perforation is provided with one, interlayer, mezzanine floor and nine floors
Height difference is 3.585 meters between face.Although ancient turriform shape is made according to Gu, its material uses steel construction, and ancient tower weight is big, to entire
The load-bearing capacity of ancient tower structure is a huge test, it is necessary to ancient tower shares out equally own wt as far as possible, reduces simultaneously
Difficulty of construction.Therefore, a ancient tower frame structure for being capable of sectional construction tower body is very necessary.
Present tower body frame structure, the main problems are as follows：
1st, present tower body frame structure cannot well solve overweight ask of conducting oneself with dignity in large-scale all steel building construction process mostly
Topic, work progress is complicated, takes long, efficiency is low.
2nd, present tower body frame structure is easily influenced be subject to high-altitude strong wind, led mostly without outstanding wind loading rating
It causes structure unstable, triggers safety problem.
The content of the invention
Goal of the invention：For deficiency more than overcoming, the object of the present invention is to provide a kind of heretofore described segmenteds
Tower body by using the method that segmented is constructed, is divided into multistage construction, reduced by steel pipe framework structure and its installation method
The weight of single steel, reduces difficulty of construction；The toughness of the construction method of segmented and steel itself can be Gu simultaneously
Tower provides good toughness, so as to obtain outstanding wind loading rating, adds security performance.
Technical solution：To achieve these goals, the present invention provides a kind of segmented steel pipe framework structure, including：Steel
Tubing string fixes girder steel, floor girder steel and chooses girder steel, and the steel pipe column is vertically arranged on column foot, is set between the steel pipe column
Fixed girder steel is equipped with, floor girder steel is provided on the outside of the steel pipe column, is provided on the outside of the floor girder steel and chooses girder steel；It is described
It fixes girder steel, floor girder steel and chooses girder steel and be horizontally disposed with；The floor girder steel is divided into bright layer girder steel and blindstory girder steel, is stated clearly
Layer girder steel and blindstory girder steel are arranged at intervals.
By using full steel structure, reliable stabilization is provided for Gu tower for the setting of heretofore described frame structure
Property, intensity, toughness and fire line, ensure that the security of tower body.
The polygon-octagonal that heretofore described fixation girder steel essence is made of two squares, the fixed girder steel
Using H profile steel, using welding between the H profile steel；Mutual 22.5 ° of the deflection of two square of fixed girder steel forms positive octagonal
Shape.
The setting of heretofore described fixed girder steel, the branch stablized by using the mode of plural graphics overlay
Support structure, while also used the principle of triangle rock-steady structure so that steel pipe column can obtain enough support and fix.
Heretofore described steel pipe column is divided into outer layer pipe column and inner layer steel pipe column, the outer layer pipe column be arranged at and
Inner layer steel pipe column may be contained at the salient angle of polygon-octagonal, and the inner layer steel pipe column is arranged at octagon nook.
The setting of heretofore described steel pipe column uses plural number arrangement, the method for inside and outside interlaced arrangement steel pipe column, obtains
Powerful enabling capabilities；Inside and outside arrangement staggeredly so that the fixation girder steel between steel pipe column also can oblique connection steel simultaneously
Tubing string, can power that effectively scattered tower is experienced, ensure the stability of tower body, enhance the wind resistance of tower body.
Heretofore described steel pipe column is put together by multistage cylinder, and the steel pipe column single long length is not higher than 12 meters；
The cylinder is provided at both ends with connecting plate, and connecting hole is provided on the connecting plate, lifting is provided on the connecting plate
Earhole is provided with the protrusive board of connection floor girder steel on the steel pipe column.
The setting of heretofore described steel pipe column, is fixed by connecting plate, facilitates construction by earhole；It is by steel simultaneously
Tubing string is divided into the small multistage of weight, is on the one hand conducive to the quick progress of construction, is on the other hand conducive to improve tower body entirety
Toughness, improve the wind resistance of tower body.
Heretofore described floor girder steel includes outer Zhang Liang and around beam, and the outer Zhang Liang is fixed on steel pipe column, institute
It states and is fixed on around beam on outer Zhang Liang, the circular beam is surrounded on the outside of steel pipe column；It states a layer girder steel clearly and further includes reinforced steel beam and girder,
The reinforced steel beam and girder is arranged at around between beam and steel pipe column.
The setting of heretofore described floor girder steel, ensure that the robustness of flooring so that the security performance of tower body obtains
It greatly improves.
It is provided with cable wire between heretofore described floor girder steel, the cable wire is connected to adjacent bright from bright layer girder steel
Layer girder steel, the cable wire pass through blindstory girder steel.
The setting of heretofore described cable wire can be effectively fixed floor girder steel, and power can be carried out good
Vertical conduction improves the stability of tower body.
Heretofore described steel pipe column center is provided with stair steelframe, and the stair steelframe is vertical with " day " shaped sections
Arrangement.
The installation method of heretofore described a kind of segmented steel pipe framework structure, including from the inside to the outside, from the bottom to top
Lifting construction, specifically include following steps：Step 1：Steel pipe column is installed, using crawler crane tower crane steel loading tubing string, is used simultaneously
Total powerstation and laser transit measure control, it is ensured that the positioning of erection of steel pipe column and installation accuracy；Step 2：Installation is fixed
Girder steel fills fixed girder steel using crawler crane tower crane；Step 3：Floor girder steel is installed, floor girder steel, peace are filled using crawler crane tower crane
During dress floor girder steel is supported using interim drag-line；Step 4：Remove interim drag-line；Step 5：Girder steel is chosen in installation, uses
Crawler crane tower crane dress chooses girder steel；Step 6：Step 2 is repeated to step 5, until completing installation site on steel pipe column；Step
Seven：Step 1 is repeated to step 6.
A kind of installation method of heretofore described segmented steel pipe framework structure, the floor girder steel work progress
Middle installation cable wire.
The installation method of heretofore described a kind of segmented steel pipe framework structure, after the completion of steel pipe column construction
Stair steelframe is filled using crawler crane tower crane.
Above-mentioned technical proposal can be seen that the present invention and have the advantages that：
1st, a kind of heretofore described segmented steel pipe framework structure and its installation method use the side of plural graphics overlay
The fixation girder steel support construction that formula is stablized, while also used the principle of triangle rock-steady structure so that steel pipe column energy
It is enough to obtain enough support and fix.
Steel pipe column is divided into weight by the 2nd, a kind of heretofore described segmented steel pipe framework structure and its installation method
Small multistage is measured, is on the one hand conducive to the quick progress of construction, is on the other hand conducive to improve the toughness of tower body entirety, improves
The wind resistance of tower body.
3rd, a kind of heretofore described segmented steel pipe framework structure and its installation method, by being set on the outside of tower body
Cable wire is put, connects adjacent floor girder steel, floor girder steel can be effectively fixed, and vertical well pass can be carried out to power
It leads, improves the stability of tower body.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is the structure diagram of the bright layer girder steel of the present invention；
Fig. 3 is the structure diagram of blindstory girder steel of the present invention；
Fig. 4 is the structure diagram of floor girder steel arrangement and method for construction of the present invention；
In figure：Steel pipe column -1, fixed girder steel -2, floor girder steel -3, bright layer girder steel -31, blindstory girder steel -32, outer Zhang Liang -33, ring
Linger -34, reinforced steel beam and girder -35, choose girder steel -4, cable wire -5, stair steelframe -6, interim drag-line -7.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated.
Embodiment 1
A kind of segmented steel pipe framework structure as shown in Figure 1, including：Steel pipe column 1 is fixed girder steel 2, floor girder steel 3 and is chosen
Girder steel 4, the steel pipe column 1 are vertically arranged on column foot, and fixed girder steel 2, the steel pipe column 1 are provided between the steel pipe column 1
Outside is provided with floor girder steel 3, and 3 outside of floor girder steel, which is provided with, chooses girder steel 4；The fixed girder steel 2, floor girder steel 3
It is horizontally disposed with girder steel 4 is chosen；The floor girder steel 3 divides for bright layer girder steel 31 and blindstory girder steel 32, states 31 He of layer girder steel clearly
Blindstory girder steel 32 is arranged at intervals.
The polygon-octagonal that 2 essence of fixation girder steel described in the present embodiment is made of two squares, the fixation
Girder steel 2 uses H profile steel, and welding is used between the H profile steel；Described mutual 22.5 ° of formation of deflection of 2 liang of squares of fixed girder steel
Polygon-octagonal.
Steel pipe column 1 described in the present embodiment divides for outer layer pipe column and inner layer steel pipe column, the outer layer pipe column setting
It may be contained in inner layer steel pipe column at the salient angle of polygon-octagonal, the inner layer steel pipe column is arranged at octagon nook.
Steel pipe column 1 described in the present embodiment is put together by multistage cylinder, and 1 single long length of steel pipe column is not higher than 12
Rice；The cylinder is provided at both ends with connecting plate, and connecting hole is provided on the connecting plate, and lifting is provided on the connecting plate and is used
Earhole, the protrusive board of connection floor girder steel 3 is provided on the steel pipe column 1.
Floor girder steel 3 described in the present embodiment includes a beam 33 outside and around beam 34, and the outer beam 33 is fixed on steel
On tubing string 1, the circular beam 34 is fixed on Wai Zhangliang 33, and the circular beam 34 is surrounded on 1 outside of steel pipe column；State a layer steel clearly
Beam 31 further includes reinforced steel beam and girder 35, and the reinforced steel beam and girder 35 is arranged at around between beam 34 and steel pipe column 1.
Cable wire 5 is provided between floor girder steel 3 described in the present embodiment, the cable wire 5 is connected to from bright layer girder steel 31
Adjacent bright layer girder steel 31, the cable wire pass through blindstory girder steel.
1 center of steel pipe column described in the present embodiment is provided with stair steelframe 6, and the stair steelframe 6 is cut with " day " font
Face is arranged vertically.
A kind of installation method of segmented steel pipe framework structure described in the present embodiment, including from the inside to the outside, by down toward
On lifting construction, specifically include following steps：Step 1：Steel pipe column 1 is installed, using crawler crane tower crane steel loading tubing string 1, simultaneously
Control is measured using total powerstation and laser transit, it is ensured that the positioning and installation accuracy that steel pipe column 1 is installed；Step 2：Peace
The fixed girder steel 2 of dress fills fixed girder steel 2 using crawler crane tower crane；Step 3：Floor girder steel 3 is installed, building is filled using crawler crane tower crane
Layer girder steel 3 uses interim drag-line 7 support floor girder steel 3 in installation process；Step 4：Remove interim drag-line 7；Step 5：Installation
Choose girder steel 4, choose girder steel 4 using crawler crane tower crane dress；Step 6：Step 2 is repeated to step 5, until completing steel pipe column 1
Upper installation site；Step 7：Step 1 is repeated to step 6.
A kind of installation method of segmented steel pipe framework structure described in the present embodiment, the floor girder steel 3 are constructed
Cable wire 5 is installed in the process.
A kind of installation method of segmented steel pipe framework structure described in the present embodiment, the steel pipe column 1 have been constructed
Crawler crane tower crane dress stair steelframe 6 is used into rear.
Embodiment 2
A kind of segmented steel pipe framework structure as shown in Figures 2 and 3, including：Steel pipe column 1 is fixed girder steel 2, floor girder steel 3 and is chosen
Go out girder steel 4, the steel pipe column 1 is vertically arranged on column foot, and fixed girder steel 2, the steel pipe column are provided between the steel pipe column 1
1 outside is provided with floor girder steel 3, and 3 outside of floor girder steel, which is provided with, chooses girder steel 4；The fixed girder steel 2, floor girder steel 3
It is horizontally disposed with girder steel 4 is chosen；The floor girder steel 3 divides for bright layer girder steel 31 and blindstory girder steel 32, states 31 He of layer girder steel clearly
Blindstory girder steel 32 is arranged at intervals.
Floor girder steel 3 described in the present embodiment includes a beam 33 outside and around beam 34, and the outer beam 33 is fixed on steel
On tubing string 1, the circular beam 34 is fixed on Wai Zhangliang 33, and the circular beam 34 is surrounded on 1 outside of steel pipe column；State a layer steel clearly
Beam 31 further includes reinforced steel beam and girder 35, and the reinforced steel beam and girder 35 is arranged at around between beam 34 and steel pipe column 1.
1 center of steel pipe column described in the present embodiment is provided with stair steelframe 6, and the stair steelframe 6 is cut with " day " font
Face is arranged vertically.
Embodiment 3
A kind of segmented steel pipe framework structure as shown in Figure 4, including：Steel pipe column 1 is fixed girder steel 2, floor girder steel 3 and is chosen
Girder steel 4, the steel pipe column 1 are vertically arranged on column foot, and fixed girder steel 2, the steel pipe column 1 are provided between the steel pipe column 1
Outside is provided with floor girder steel 3, and 3 outside of floor girder steel, which is provided with, chooses girder steel 4；The fixed girder steel 2, floor girder steel 3
It is horizontally disposed with girder steel 4 is chosen；The floor girder steel 3 divides for bright layer girder steel 31 and blindstory girder steel 32, states 31 He of layer girder steel clearly
Blindstory girder steel 32 is arranged at intervals.
Cable wire 5 is provided between floor girder steel 3 described in the present embodiment, the cable wire 5 is connected to from bright layer girder steel 31
Adjacent bright layer girder steel 31, the cable wire pass through blindstory girder steel.
A kind of installation method of segmented steel pipe framework structure described in the present embodiment, including from the inside to the outside, by down toward
On lifting construction, specifically include following steps：Step 1：Steel pipe column 1 is installed, using crawler crane tower crane steel loading tubing string 1, simultaneously
Control is measured using total powerstation and laser transit, it is ensured that the positioning and installation accuracy that steel pipe column 1 is installed；Step 2：Peace
The fixed girder steel 2 of dress fills fixed girder steel 2 using crawler crane tower crane；Step 3：Floor girder steel 3 is installed, building is filled using crawler crane tower crane
Layer girder steel 3 uses interim drag-line 7 support floor girder steel 3 in installation process；Step 4：Remove interim drag-line 7；Step 5：Installation
Choose girder steel 4, choose girder steel 4 using crawler crane tower crane dress；Step 6：Step 2 is repeated to step 5, until completing steel pipe column 1
Upper installation site；Step 7：Step 1 is repeated to step 6.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, several improvement can also be made, these improvement also should be regarded as the present invention's
Protection domain.
Claims (10)
1. a kind of segmented steel pipe framework structure, it is characterised in that：Including：Steel pipe column（1）, fixed girder steel（2）, floor girder steel
（3）With choose girder steel（4）, the steel pipe column（1）It is vertically arranged on column foot, the steel pipe column（1）Between be provided with fixed steel
Beam（2）, the steel pipe column（1）Outside is provided with floor girder steel（3）, the floor girder steel（3）Outside, which is provided with, chooses girder steel
（4）；The fixed girder steel（2）, floor girder steel（3）With choose girder steel（4）It is horizontally disposed；The floor girder steel（3）It is divided into bright layer
Girder steel（31）With blindstory girder steel（32）, state a layer girder steel clearly（31）With blindstory girder steel（32）It is arranged at intervals.
2. a kind of segmented steel pipe framework structure according to claim 1, it is characterised in that：The fixation girder steel（2）
The polygon-octagonal that essence is made of two squares, the fixed girder steel（2）Using H profile steel, used between the H profile steel
Welding；The fixed girder steel（2）22.5 ° of formation polygon-octagonals of the mutual deflection of two squares.
3. a kind of segmented steel pipe framework structure according to claim 2, it is characterised in that：The steel pipe column（1）Point
For outer layer pipe column and inner layer steel pipe column, the outer layer pipe column is arranged at may be contained within the convex of polygon-octagonal with inner layer steel pipe column
At angle, the inner layer steel pipe column is arranged at octagon nook.
4. a kind of segmented steel pipe framework structure according to claim 1, it is characterised in that：The steel pipe column（1）By
Multistage cylinder is put together, the steel pipe column（1）Single long length is not higher than 12 meters；The cylinder is provided at both ends with connecting plate, institute
It states and connecting hole is provided on connecting plate, the earhole of lifting, the steel pipe column are provided on the connecting plate（1）On the company of being provided with
Connect floor girder steel（3）Protrusive board.
5. a kind of segmented steel pipe framework structure according to claim 1, it is characterised in that：The floor girder steel（3）
Including outer Zhang Liang（33）With circular beam（34）, the outer Zhang Liang（33）It is fixed on steel pipe column（1）On, the circular beam（34）It is fixed
In outer Zhang Liang（33）On, the circular beam（34）It is surrounded on steel pipe column（1）Outside；State a layer girder steel clearly（31）Further include reinforcement steel
Beam（35）, the reinforced steel beam and girder（35）It is arranged at around beam（34）With steel pipe column（1）Between.
6. a kind of segmented steel pipe framework structure according to claim 1, it is characterised in that：The floor girder steel（3）
Between be provided with cable wire（5）, the cable wire（5）From bright layer girder steel（31）It is connected to adjacent bright layer girder steel（31）, the cable wire
Through blindstory girder steel.
7. a kind of segmented steel pipe framework structure according to claim 1, it is characterised in that：The steel pipe column（1）In
Centre is provided with stair steelframe（6）, the stair steelframe（6）It is arranged vertically with " day " shaped sections.
8. a kind of installation method of segmented steel pipe framework structure according to claim 1, including from the inside to the outside, by down toward
On lifting construction, it is characterised in that：Specifically include following steps：
Step 1：Steel pipe column is installed（1）, use crawler crane tower crane steel loading tubing string（1）, while use total powerstation and laser transit
Measure control, it is ensured that steel pipe column（1）The positioning of installation and installation accuracy；
Step 2：The fixed girder steel of installation（2）, fixed girder steel is filled using crawler crane tower crane（2）；
Step 3：Floor girder steel is installed（3）, floor girder steel is filled using crawler crane tower crane（3）, interim drag-line is used in installation process
（7）Support floor girder steel（3）；
Step 4：Remove interim drag-line（7）；
Step 5：Girder steel is chosen in installation（4）, choose girder steel using crawler crane tower crane dress（4）；
Step 6：Step 2 is repeated to step 5, until completing steel pipe column（1）Upper installation site；
Step 7：Step 1 is repeated to step 6.
9. a kind of installation method of segmented steel pipe framework structure according to claim 6, it is characterised in that：The building
Layer girder steel（3）Cable wire is installed in work progress（5）.
10. a kind of installation method of segmented steel pipe framework structure according to claim 7, it is characterised in that：Described
Steel pipe column（1）After the completion of construction stair steelframe is filled using crawler crane tower crane（6）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711386669.9A CN108086777A (en) | 2017-12-20 | 2017-12-20 | A kind of segmented steel pipe framework structure and its installation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711386669.9A CN108086777A (en) | 2017-12-20 | 2017-12-20 | A kind of segmented steel pipe framework structure and its installation method |
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| CN108086777A true CN108086777A (en) | 2018-05-29 |
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ID=62177593
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711386669.9A Pending CN108086777A (en) | 2017-12-20 | 2017-12-20 | A kind of segmented steel pipe framework structure and its installation method |
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Cited By (1)
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| CN111620254A (en) * | 2020-06-10 | 2020-09-04 | 中国电建集团山东电力建设有限公司 | Torch tube lifting and mounting system and method |
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Application publication date: 20180529 |