CN112360229A - Foldable sound insulation barrier enclosure combined structure in construction period and mounting method - Google Patents
Foldable sound insulation barrier enclosure combined structure in construction period and mounting method Download PDFInfo
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- CN112360229A CN112360229A CN202011177949.0A CN202011177949A CN112360229A CN 112360229 A CN112360229 A CN 112360229A CN 202011177949 A CN202011177949 A CN 202011177949A CN 112360229 A CN112360229 A CN 112360229A
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- 238000009413 insulation Methods 0.000 title claims abstract description 129
- 230000004888 barrier function Effects 0.000 title claims abstract description 50
- 238000010276 construction Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000009434 installation Methods 0.000 claims abstract description 6
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000013016 damping Methods 0.000 claims description 49
- 229910000831 Steel Inorganic materials 0.000 claims description 40
- 239000010959 steel Substances 0.000 claims description 40
- 230000000670 limiting effect Effects 0.000 claims description 35
- 230000001681 protective effect Effects 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 6
- 230000008569 process Effects 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/16—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames
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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
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B1/86—Sound-absorbing elements slab-shaped
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- Architecture (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
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- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention provides a foldable sound insulation barrier enclosure combined structure in a construction period and an installation method, and the foldable sound insulation barrier enclosure combined structure comprises a supporting structure, a sound insulation structure capable of being unfolded upwards and folded downwards, an enclosure and a fixing structure, wherein the supporting structure comprises two upright posts which are arranged oppositely, lifting guide grooves are arranged in the upright posts, the sound insulation structure comprises two or more than two sound insulation plates, the sound insulation plates are connected through hinge connecting pieces, roller shafts are arranged at the upper parts of the sound insulation plates at the tops in a penetrating manner, rollers are arranged at two ends of the roller shafts, the rollers are in limit fit with the lifting guide grooves, and the fixing structure is used for fixing the sound insulation plates; aiming at the construction engineering constructed in the areas with the abnormal weather such as typhoons and the like, the invention selects the sound insulation barrier structure which can reduce the typhoon damage risk and reduce the construction cost.
Description
Technical Field
The invention relates to the technical field of noise prevention and reduction in a construction period, in particular to a foldable sound insulation barrier enclosure combined structure in the construction period and an installation method.
Background
With the continuous promotion of human construction activities, the influence of noise pollution generated in the construction process of building engineering on the ecological environment, the life of people, office work and study is increasingly intensified. Construction activities may occur in cities, suburbs, rural areas, rivers and lakes, mountainous areas and other places, and noise pollution of buildings also occurs. Especially in areas such as urban residential concentration areas, bird protection areas, fish protection areas and the like, the influence caused by noise pollution is particularly obvious.
In recent years, the public self environmental protection awareness is increasingly strengthened, the noise pollution reaction in various regions is more and more intense, and government departments also successively make noise control related laws and regulations to control construction noise. Noise control methods are primarily based on the acoustic source, propagation path, and recipient. The main methods for controlling the noise source in the construction process of the constructional engineering include selecting construction machinery and construction methods which generate lower noise, and the like, and are the most basic control methods for eliminating or reducing noise pollution; the main modes of controlling noise in the construction process of the building engineering by the transmission path include methods of arranging a sound insulation barrier, a sound absorption barrier and the like; the noise receivers can be human beings, birds and the like, the population is large, and the noise receivers are difficult to control construction noise of the building engineering.
In the construction process of the building engineering, construction machinery which generates large noise is inevitably selected, and at the moment, the best method for reducing the noise influence starts from a transmission path, namely, structures such as a sound insulation screen, a sound absorption barrier and the like are arranged.
In the areas with frequent abnormal weather such as typhoon, typhoon load and the like need to be considered in the structural design and installation of the fixed sound-insulation barrier, the design strength grade of the foundation, the stand column and the sound-insulation barrier material is higher, and the cost investment is larger. If meet the extreme weather that surpasss the design load, cause the sound insulation protective screen to destroy by a large scale easily, economic loss is great, even causes the casualties.
Disclosure of Invention
The invention aims to provide a foldable sound insulation barrier enclosure combined structure in a construction period, and aims to select a sound insulation barrier structure which can reduce typhoon damage risks and construction cost for building engineering constructed in an abnormal weather and frequent weather area such as typhoons.
Therefore, the invention adopts the following technical scheme:
the utility model provides a collapsible sound insulation protective screen of construction period encloses fender integrated configuration which characterized in that: including bearing structure, can upwards expand and downward folding sound insulation construction, enclose fender and fixed knot construct, bearing structure includes two stands that set up relatively, the inside lift guide way that sets up of stand, sound insulation construction includes two pages of and above sound insulation panel, is connected through hinge connection spare between the sound insulation panel, and the gyro wheel axle is worn to establish on the upper portion of the sound insulation panel at top, and the both ends of gyro wheel axle set up the gyro wheel, gyro wheel and the spacing cooperation of lift guide way, fixed knot constructs the sound insulation panel that is used for fixed folding back downwards.
Further: the fixed knot constructs including ground anchor and the lift ring that can mutually support, ground anchor is fixed mutually with ground, and the middle part at the acoustic panel top at top sets up the lift ring.
Further: the two columns are positioned through the limiting guide rail, and the limiting guide rail comprises two L-shaped narrow steel plates and two U-shaped fasteners.
Further: the upright post is provided with an upper limiting hole and a lower limiting hole, the upper limiting hole and the lower limiting hole are penetrated with bolts, and the upper limiting hole is arranged below the roller shaft after the sound insulation board is lifted in place.
Further: the damping shaft is penetrated through the lower part of the sound insulation board at the bottom, damping elements are arranged at two ends of the damping shaft, positioning part connecting holes are arranged at the connecting parts of two ends of the damping shaft and the upright post, and the positioning part connecting holes are arranged opposite to the lower limiting holes.
Further: the damping device is characterized in that the upper end of the top sound insulation plate and the lower end of the bottom sound insulation plate are respectively fixedly provided with an upper steel pipe and a lower steel pipe, the roller shaft and the damping shaft are respectively arranged inside the upper steel pipe and the lower steel pipe in a penetrating mode and are respectively connected with the upper steel pipe and the lower steel pipe through an upper bearing and a lower bearing, one end of the damping element is connected with the steel pipes, and the other end of the damping element is connected with the damping shaft.
Further: enclose the fender setting in the outside of stand, the inboard of stand is used for the folding placing of panel that gives sound insulation.
It is another object of the present invention to provide a method of installing a construction-time collapsible sound barrier as described above, the sound barrier comprising a plurality of the construction-time collapsible sound barrier surround assemblies arranged side-by-side: the installation steps of the enclosure combination structure are as follows:
s1: leveling a field, measuring and paying off at the position of the designed sound insulation barrier, and marking the point position of the steel upright post;
s2: placing a limit guide rail at the marked point position, and driving two upright posts in U-shaped fasteners at two ends of the limit guide rail;
s3: after the construction of the stand columns is finished, the limiting guide rails are dismantled, the stand column construction of the next sound insulation barrier enclosure combined structure is carried out, meanwhile, a bottom sound insulation plate is installed between the two stand columns of the first construction sound insulation barrier enclosure combined structure, and a damping shaft and a damping element are installed on the bottom sound insulation plate in advance before the bottom sound insulation plate is installed;
s4: sequentially installing other sound insulation plates above the bottom sound insulation plate, connecting the sound insulation plates by using a hinge connecting piece, and installing rollers and roller shafts on the top sound insulation plate in advance before installing the top sound insulation plate;
s5: and one side of the upright post is provided with an enclosure.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention reasonably utilizes the steel upright posts as the supporting structure of the sound insulation barrier, adopts the foldable sound insulation plate, and folds the sound insulation plate before the abnormal weather such as typhoon comes, reduces the wind load acting on the sound insulation barrier, and effectively avoids the damage of the sound insulation barrier caused by the abnormal weather such as typhoon and the casualties caused by the damage of the sound insulation barrier. The method has low requirement on the column foundation, does not need to consider huge wind load borne by the sound insulation barrier under the abnormal weather conditions of typhoon and the like, and greatly saves the construction cost of the temporary sound insulation barrier in the construction period.
2. The invention utilizes the processes of folding and lifting the sound insulation board, storing the force by the damping shaft and the damping element, and releasing the stored force, reduces the descending speed of the folded sound insulation board, saves the manpower for re-lifting the sound insulation board, and arranges the permeable enclosure outside the sound insulation barrier, thereby playing the role of construction enclosure during the folding of the sound insulation barrier and effectively preventing accidents caused by the entry of engineering irrelevant personnel into the construction site.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a side view of the present invention;
FIG. 4 is a partial enlarged view of FIG. 2A;
FIG. 5 is a partial enlarged view of FIG. 3B;
FIG. 6 is a partial enlarged view of FIG. 3C;
FIG. 7 is a schematic view of a curb rail configuration;
fig. 8 is a schematic view of a column installation process.
The labels in the figures are: 1-sound insulation board; 2-upper steel pipe; 3-roller shaft; 4-common rollers; 5-an upper bearing; 6-upright post; 7-a lifting ring; 8-hinge connection piece; 9-a damping element; 10-upper limit hole; 11-lower limit hole; 12-an earth anchor; 13-a bolt; 14-fencing; 15-L type narrow steel plate; 16-U type fasteners; 17-lower steel pipe; 18-a damping shaft; 19-a lower bearing; 20-lifting guide groove.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
As shown in fig. 1-8, the present invention provides a foldable sound insulation barrier enclosure combined structure during construction period, which comprises a supporting structure, a sound insulation structure capable of expanding upwards and folding downwards, an enclosure and a fixing structure, wherein the supporting structure comprises two opposite upright posts 6, the upright posts 6 can be transformed by I-shaped steel or C-shaped steel, the upright posts are driven into a specified position by a pile driver, the position-limiting guide rail is placed before the upright posts 6 are driven into the specified position, the size of the position-limiting guide rail is adjusted according to the width of the sound insulation panel 1, a lifting guide groove is arranged inside the upright posts 6, the sound insulation structure comprises two or more than two sound insulation panels 1, the sound insulation panels 1 are made of sound insulation or sound absorption material, construction noise is reduced by reflecting or absorbing sound, the number of the sound insulation panels 1 is determined according to the height of the designed sound insulation barrier, the sound insulation panels 1, the setting mode of hinge connecting piece 8 matches with the region that sound insulation panel 1 was located after folding, as shown in fig. 2, the best for making sound insulation panel be in the inboard of stand after folding, roller shaft 3 is worn to establish on the upper portion of the sound insulation panel 1 at top, and the both ends of roller shaft 3 set up the gyro wheel, and the spacing cooperation of gyro wheel and lift guide way, gyro wheel move in the lift guide way, fixed knot constructs the sound insulation panel 1 that is used for fixing after folding downwards.
As shown in fig. 2, the enclosure 14 is disposed outside the column 6, the sound insulation board is folded downward and is entirely located inside the column 6, the inside of the column 6 is used for folding the sound insulation board, and the enclosure 14 is a transparent enclosure and is installed outside the sound insulation barrier for enclosing a construction area after the sound insulation barrier is folded in a construction period. The sound insulation barrier encloses fender integrated configuration and sets up a plurality ofly to arrange in proper order subaerial.
The fixing structure comprises a ground anchor 12 and a lifting ring 7 which can be matched with each other, the ground anchor 12 is fixed with the ground, and the lifting ring 7 is arranged in the middle of the top of the sound insulation board 1 at the top. The lifting ring 7 is used to lift the soundproofing board 1 and fix the soundproofing board 1 to the ground anchor 12 after the soundproofing board 1 is lowered and folded.
The limiting guide rail comprises two transverse L-shaped narrow steel plates 15 and two U-shaped fasteners 16, the two L-shaped narrow steel plates 15 are spliced into a limiting cavity with certain width and length, the two U-shaped fasteners 16 are buckled at two ends of the limiting cavity respectively, the two L-shaped narrow steel plates 15 are connected together at two ends of the limiting cavity, the limiting guide rail is used for aligning two adjacent stand columns 6, the width of the limiting cavity is consistent with the width of the stand columns in the inner and outer side directions, the two L-shaped narrow steel plates 15 have certain height and can play a role in guiding the stand columns 6 when piling, the U-shaped fasteners 16 and the L-shaped narrow steel plates 15 are detachably connected, and after the stand columns are piled, the U-shaped fasteners 16 are directly pulled out sideways or upwards to disassemble the limiting guide rail and are recombined for use when the next stand columns 6 of the sound-insulating barrier enclosure combined structure are piled. The U-shaped fastener 16 can also be a splicing structure formed by connecting steel plates through corner-combining connecting pieces.
An upper limiting hole and a lower limiting hole 11 are formed in the upright post 6, a bolt 13 penetrates through the upper limiting hole and the lower limiting hole 11, the upper limiting hole is formed below the roller shaft 3 after the sound insulation board 1 is lifted in place, and the bolt 13 is inserted into the upper limiting hole to prevent the sound insulation board 1 from descending.
The lower part of the sound insulation board 1 at the bottom is penetrated with a damping shaft 18, two ends of the damping shaft 18 are provided with damping elements 9, the connecting part of the two ends of the damping shaft 18 and the upright post 6 is provided with a positioning part connecting hole, the positioning part connecting hole is opposite to the lower limiting hole 11, and a bolt 13 is inserted into the lower limiting hole 11 and the positioning part connecting hole to limit the rotation of the damping shaft 18. The damping member 9 and the damping shaft 18 are used to reduce the lowering speed of the soundproofing board 1 when folded and save the manpower for re-lifting the soundproofing board 1, and the specification parameters of the damping member 9 are selected after calculation according to the weight of the soundproofing board 1.
The top gives sound insulation panel 1 upper end and bottom give sound insulation panel 1 lower extreme and fixedly set up upper portion steel pipe 2 and lower part steel pipe 17 respectively, and gyro wheel axle 3 and damping axle 18 set up and wear to establish respectively in the inside of upper portion steel pipe 2 and lower part steel pipe 17 to be connected with upper portion steel pipe 2 and lower part steel pipe 17 through upper portion bearing 5 and lower part bearing 19 respectively, damping element one end is connected with the steel pipe, and the other end is connected with the damping axle, and the connected mode adopts welding, anchor or perforation ligature according to actual production technology and atress characteristic. After the sound insulation board is installed, the damping shaft is fixed on the steel upright post through the bolt, when the sound insulation board is folded, the sound insulation board rotates relative to the damping shaft, the damping element deforms to store force, reverse resistance is generated on the sound insulation board, and the sound insulation board is prevented from directly falling under the action of self weight to cause damage; when the sound insulation board is lifted, the damping element is deformed and recovered, the stored force is released, positive acting force is generated on the sound insulation board, and the lifting force of an operator is reduced. The damping element can adopt a spring damping and damping oil cylinder type damping element.
When the sound insulation boards are required to be folded, the top sound insulation board 1 is pulled down, the rollers at the two ends of the roller shaft 3 slide downwards in the lifting guide grooves, two adjacent sound insulation boards 1 are folded through the relative rotation of the hinge connecting piece 8, meanwhile, the damping element deforms and stores energy in the steel pipe, and after the top sound insulation board 1 descends to the lowest position, the top sound insulation board 1 is buckled with the ground anchor 12 through the lifting ring 7 to fix the sound insulation board 1; when the soundproof panel 1 needs to be lifted, the lifting ring 7 is unfastened and the lifting ring 7 is lifted upwards, and in the process of lifting the bottom soundproof panel 1, the damping element releases potential energy, so that the soundproof panel 1 is lifted more conveniently.
In use in construction engineering, a sound barrier for a construction site may comprise a plurality of the above-described construction-time collapsible sound barrier surround assemblies arranged side-by-side: the installation steps of the enclosure combination structure are as follows:
s1: leveling the field, measuring and paying off at the position of the designed sound insulation barrier, and marking the point position of the steel upright post 6;
s2: placing a limit guide rail at the marked point position, and driving two upright posts 6 in U-shaped fasteners 16 at two ends of the limit guide rail;
s3: after the construction of the upright post 6 is finished, the limiting guide rail is dismantled, the construction of the upright post 6 of the next sound insulation barrier enclosure combined structure is carried out, meanwhile, the bottom sound insulation plate 1 is installed between the two upright posts 6 of the first construction sound insulation barrier enclosure combined structure, and before the bottom sound insulation plate 1 is installed, the damping shaft 18 and the damping element 9 are installed on the bottom sound insulation plate 1 in advance;
s4: sequentially installing other sound insulation plates 1 above the bottom sound insulation plate 1, connecting the sound insulation plates by using a hinge connecting piece 8, and installing a roller and a roller shaft 3 on the top sound insulation plate 1 in advance before installing the top sound insulation plate 1;
s5: and a fence is arranged on one side of the upright post 6.
The above embodiment is merely a preferred embodiment of the present invention, and those skilled in the art will understand that modifications or substitutions of technical solutions or parameters in the embodiment can be made without departing from the principle and essence of the present invention, and all of them shall be covered by the protection scope of the present invention.
Claims (8)
1. The utility model provides a collapsible sound insulation protective screen of construction period encloses fender integrated configuration which characterized in that: including bearing structure, can upwards expand and downward folding sound insulation construction, enclose fender and fixed knot construct, bearing structure includes two stands that set up relatively, the inside lift guide way that sets up of stand, sound insulation construction includes two pages of and above sound insulation panel, is connected through hinge connection spare between the sound insulation panel, and the gyro wheel axle is worn to establish on the upper portion of the sound insulation panel at top, and the both ends of gyro wheel axle set up the gyro wheel, gyro wheel and the spacing cooperation of lift guide way, fixed knot constructs the sound insulation panel that is used for fixed folding back downwards.
2. A construction-time foldable sound insulating barrier surround assembly structure as claimed in claim 1, wherein: the fixed knot constructs including ground anchor and the lift ring that can mutually support, ground anchor is fixed mutually with ground, and the middle part at the acoustic panel top at top sets up the lift ring.
3. A construction-time foldable sound insulating barrier surround assembly structure as claimed in claim 1, wherein: the two columns are positioned through the limiting guide rail, and the limiting guide rail comprises two L-shaped narrow steel plates and two U-shaped fasteners.
4. A construction-time foldable sound insulating barrier surround assembly structure as claimed in claim 1, wherein: the upright post is provided with an upper limiting hole and a lower limiting hole, the upper limiting hole and the lower limiting hole are penetrated with bolts, and the upper limiting hole is arranged below the roller shaft after the sound insulation board is lifted in place.
5. A construction-time foldable sound insulating barrier surround assembly structure as claimed in claim 4, wherein: the damping shaft is penetrated through the lower part of the sound insulation board at the bottom, damping elements are arranged at two ends of the damping shaft, positioning part connecting holes are arranged at the connecting parts of two ends of the damping shaft and the upright post, and the positioning part connecting holes are arranged opposite to the lower limiting holes.
6. A construction-time foldable sound insulating barrier surround assembly structure as claimed in claim 5, wherein: the damping device is characterized in that the upper end of the top sound insulation plate and the lower end of the bottom sound insulation plate are respectively fixedly provided with an upper steel pipe and a lower steel pipe, the roller shaft and the damping shaft are respectively arranged inside the upper steel pipe and the lower steel pipe in a penetrating mode and are respectively connected with the upper steel pipe and the lower steel pipe through an upper bearing and a lower bearing, one end of the damping element is connected with the steel pipes, and the other end of the damping element is connected with the damping shaft.
7. A construction-time foldable sound insulating barrier surround assembly structure as claimed in claim 1, wherein: enclose the fender setting in the outside of stand, the inboard of stand is used for the folding placing of panel that gives sound insulation.
8. A method for installing a foldable sound insulation barrier in a construction period is characterized in that: the sound barrier comprises a plurality of side-by-side arrangements of a construction-time collapsible sound barrier enclosure assembly as claimed in any one of claims 1 to 7: the installation steps of the enclosure combination structure are as follows:
s1: leveling a field, measuring and paying off at the position of the designed sound insulation barrier, and marking the point position of the steel upright post;
s2: placing a limit guide rail at the marked point position, and driving two upright posts in U-shaped fasteners at two ends of the limit guide rail;
s3: after the construction of the stand columns is finished, the limiting guide rails are dismantled, the stand column construction of the next sound insulation barrier enclosure combined structure is carried out, meanwhile, a bottom sound insulation plate is installed between the two stand columns of the first construction sound insulation barrier enclosure combined structure, and a damping shaft and a damping element are installed on the bottom sound insulation plate in advance before the bottom sound insulation plate is installed;
s4: sequentially installing other sound insulation plates above the bottom sound insulation plate, connecting the sound insulation plates by using a hinge connecting piece, and installing rollers and roller shafts on the top sound insulation plate in advance before installing the top sound insulation plate;
s5: and one side of the upright post is provided with an enclosure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011177949.0A CN112360229B (en) | 2020-10-29 | 2020-10-29 | Foldable sound insulation barrier enclosure combined structure in construction period and mounting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011177949.0A CN112360229B (en) | 2020-10-29 | 2020-10-29 | Foldable sound insulation barrier enclosure combined structure in construction period and mounting method |
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| CN112360229A true CN112360229A (en) | 2021-02-12 |
| CN112360229B CN112360229B (en) | 2022-08-05 |
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| CN115354909B (en) * | 2022-07-28 | 2024-02-06 | 中航天建设工程集团有限公司 | Temporary enclosing baffle for foundation pit |
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| CN112360229B (en) | 2022-08-05 |
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