CN114045874A - Construction method of underground structure side wall - Google Patents
Construction method of underground structure side wall Download PDFInfo
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- CN114045874A CN114045874A CN202111443284.8A CN202111443284A CN114045874A CN 114045874 A CN114045874 A CN 114045874A CN 202111443284 A CN202111443284 A CN 202111443284A CN 114045874 A CN114045874 A CN 114045874A
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- 238000010276 construction Methods 0.000 title claims abstract description 49
- 239000004567 concrete Substances 0.000 claims abstract description 32
- 230000005494 condensation Effects 0.000 claims abstract description 21
- 238000009833 condensation Methods 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 230000002787 reinforcement Effects 0.000 claims description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 18
- 210000001503 joint Anatomy 0.000 claims description 15
- 238000005266 casting Methods 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 claims description 5
- 230000001112 coagulating effect Effects 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract 1
- 241000282414 Homo sapiens Species 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011381 foam concrete Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses a construction method of a side wall of an underground structure, which comprises the following steps: the construction of the side wall of the underground structure is completed through pouring of the foundation, installation of a side wall peripheral fixing framework, installation of a side wall reinforcing steel framework, air pouring of the side wall, condensation of the side wall and assembly of the side wall, so that pouring of the side wall is completed in the air, and the angle can be adjusted in the air after pouring is completed, so that condensation of concrete can be effectively accelerated, the construction efficiency is greatly improved, the construction time is shortened, manpower and material resources are saved, and the defect of long construction period is effectively overcome.
Description
Technical Field
The invention relates to the field of building construction, in particular to a construction method of an underground structure side wall.
Background
With the improvement of the modernization level of national economy and the increase of urban population, the contradiction that human beings occupy land due to living and engaging in various activities is excited day by day, and from the macroscopic view, the increase of population and the increase of living demand, the problem of human living space caused by the gradual deterioration of natural conditions such as land and the gradual depletion of resources, and the like, should be said to reach the crisis degree, under the condition, the development and the comprehensive utilization of underground space resources provide natural resources with great potential for the expansion of human living space.
The development of construction engineering is continuously progressing with the continuous progress of science and technology and the rapid increase of economy, and the construction forms are more diversified and complicated no matter the construction forms, and the construction is developed to the longitudinal and transverse spaces, in which the high-rise buildings are continuously increased, and the underground space is developed as an extremely important natural resource. The underground structure is a structure built in an underground space which can provide a certain purpose by excavation on the premise of keeping an upper stratum, the shape and the size of the underground structure are different according to the condition difference of the purpose, the terrain, the geology, the construction, the structural performance and the like, and the underground structure is selected by surveying and preliminary design.
Chinese patent (publication No. CN113494146A) discloses a construction method of a side wall of an underground structure, in which prefabricated wall panels are directly installed through a basement bottom plate, and cast-in-place is not required, thereby greatly improving construction efficiency and shortening construction time, but the patent also has a great disadvantage that the prefabricated wall panels need to be cast in advance at other places and then transported after casting is completed, so that the volume of the prefabricated wall panels is large and transportation is very difficult.
Disclosure of Invention
The invention aims to provide a construction method of an underground structure side wall, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a construction method of an underground structure side wall comprises the following steps:
the method comprises the following steps: pouring of a foundation: installing a steel reinforcement framework on the ground according to a design drawing, and pouring concrete to complete the construction of a foundation;
step two: installing a side wall peripheral fixing framework: building a fixed framework outside the side wall according to a design drawing;
step three: installing a side wall steel reinforcement framework: installing a steel reinforcement framework on the formed arch ring according to a design drawing, and installing a template outside the steel reinforcement framework;
step four: pouring the side wall in the air: the template is rotatably arranged in the fixed framework, the template is placed in the air, and concrete is poured into the template to complete the construction of the side wall;
step five: and (3) condensation of the side wall: the side wall is rotatably arranged in the fixed framework, and concrete is condensed by rotating the side wall and keeping a proper position;
step six: assembling the side wall: and assembling the condensed side wall into the foundation, performing secondary pouring at the joint of the side wall and the foundation, and performing natural condensation of concrete to completely construct the side wall of the underground structure.
As a further scheme of the invention: in the first step, a fixing groove is formed in the upper surface of one side of the foundation, and two fixing columns are fixedly mounted in the fixing groove.
As a further scheme of the invention: and in the fourth step, upper rotating holes are formed above the left side and the right side of the side wall, lower fixing holes are formed below the left side and the right side of the side wall, and the upper rotating holes are rotatably installed with the framework in the second step.
As a further scheme of the invention: and in the fourth step, the left side and the right side of the bottom of the side wall are provided with butt joint holes, and the fixing columns are in butt joint with the butt joint holes.
As a further scheme of the invention: and in the fifth step, the condensation of the side wall is fixed with the framework through the fixing holes on the surface of the side wall, so that the side wall is fixedly suspended in the air, and the fixed angle is adjusted according to the direction of sunlight.
As a further scheme of the invention: and fifthly, after the side wall is condensed, detaching the template outside the side wall, condensing again, and adjusting the fixed angle according to the sunlight direction in the process of condensing again.
As a further scheme of the invention: the cross-section of the fixing groove is L-shaped, so that the side wall is favorably assembled and stabilized.
As a still further scheme of the invention: and after the secondary pouring of the side wall is finished in the sixth step, fixing the side wall with the framework through the fixing holes until the concrete is completely condensed, and dismantling the framework.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the construction of the side wall of the underground structure is completed through the pouring of the foundation, the installation of the fixed framework at the periphery of the side wall, the installation of the reinforcement framework of the side wall, the air pouring of the side wall, the condensation of the side wall and the assembly of the side wall, so that the pouring of the side wall is completed in the air, and the angle can be adjusted in the air after the pouring is completed, thereby effectively accelerating the condensation of concrete, greatly improving the construction efficiency, shortening the construction time, saving manpower and material resources and effectively solving the defect of long construction period.
Drawings
Fig. 1 is an assembly effect diagram in a construction method of an underground structure side wall.
Fig. 2 is a structure view of a foundation in a construction method of a sidewall of an underground structure.
FIG. 3 is a side view of a sidewall in a method for constructing a sidewall of an underground structure.
FIG. 4 is a bottom view of a sidewall in a method of constructing a sidewall of an underground structure.
In the figure: 1-foundation, 2-fixed groove, 3-fixed column, 4-side wall, 5-upper rotating hole, 6-lower fixed hole and 7-butt joint hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1 to 4, a method for constructing a sidewall of an underground structure includes the following steps:
the method comprises the following steps: pouring of the foundation 1: installing a steel reinforcement framework on the ground according to a design drawing, and pouring concrete to complete the construction of the foundation 1;
step two: installation of the peripheral fixed framework of the side wall 4: a fixed framework is built outside the side wall 4 according to a design drawing;
step three: installing a side wall 4 steel reinforcement framework: installing a steel reinforcement framework on the formed arch ring according to a design drawing, and installing a template outside the steel reinforcement framework;
step four: and (3) casting the side wall 4 in the air: the template is rotatably arranged in the fixed framework, the template is placed in the air, concrete is poured into the template, and the construction of the side wall 4 is completed;
step five: condensation of the side wall 4: the side wall 4 is rotatably installed in the fixed framework, and concrete is solidified by rotating the side wall 4 and keeping a proper position;
step six: assembling the side wall 4: and assembling the condensed side wall 4 into the foundation 1, performing secondary pouring at the joint of the side wall 4 and the foundation 1, and naturally condensing concrete to completely construct the side wall 4 of the underground structure.
The construction of the side wall of the underground structure can be effectively completed through the steps.
Example two
Referring to fig. 1 to 4, a method for constructing a sidewall of an underground structure includes the following steps:
the method comprises the following steps: pouring of the foundation 1: installing a steel reinforcement framework on the ground according to a design drawing, and pouring concrete to complete the construction of the foundation 1;
step two: installation of the peripheral fixed framework of the side wall 4: a fixed framework is built outside the side wall 4 according to a design drawing;
step three: installing a side wall 4 steel reinforcement framework: installing a steel reinforcement framework on the formed arch ring according to a design drawing, and installing a template outside the steel reinforcement framework;
step four: and (3) casting the side wall 4 in the air: the template is rotatably arranged in the fixed framework, the template is placed in the air, concrete is poured into the template, and the construction of the side wall 4 is completed;
step five: condensation of the side wall 4: the side wall 4 is rotatably installed in the fixed framework, and concrete is solidified by rotating the side wall 4 and keeping a proper position;
step six: assembling the side wall 4: and assembling the condensed side wall 4 into the foundation 1, performing secondary pouring at the joint of the side wall 4 and the foundation 1, and naturally condensing concrete to completely construct the side wall 4 of the underground structure.
Preferably, in the first step, a fixing groove 2 is formed in the upper surface of one side of the foundation 4, and two fixing columns 3 are fixedly mounted in the fixing groove 2.
Preferably, the upper rotating holes 5 are formed in the upper portions of the left side and the right side of the side wall 4 in the fourth step, the lower fixing holes 6 are formed in the lower portions of the left side and the right side of the side wall 4, and the upper rotating holes 5 are rotatably mounted with the framework in the second step.
Preferably, the left side and the right side of the bottom of the side wall 4 in the fourth step are provided with butt joint holes 7, and the fixing columns 3 are in butt joint with the butt joint holes 7.
Preferably, in the fifth step, the condensation of the side wall 4 is fixed with the framework through the fixing holes 6 on the surface of the side wall 4, so that the side wall 4 is fixedly suspended in the air, and the fixing angle is adjusted according to the trend of sunlight.
Preferably, the cross section of the fixing groove 2 is L-shaped, which is beneficial to the assembly and stability of the side wall 4.
EXAMPLE III
Referring to fig. 1 to 4, a method for constructing a sidewall of an underground structure includes the following steps:
the method comprises the following steps: pouring of the foundation 1: installing a steel reinforcement framework on the ground according to a design drawing, and pouring concrete to complete the construction of the foundation 1;
step two: installation of the peripheral fixed framework of the side wall 4: a fixed framework is built outside the side wall 4 according to a design drawing;
step three: installing a side wall 4 steel reinforcement framework: installing a steel reinforcement framework on the formed arch ring according to a design drawing, and installing a template outside the steel reinforcement framework;
step four: and (3) casting the side wall 4 in the air: the template is rotatably arranged in the fixed framework, the template is placed in the air, concrete is poured into the template, and the construction of the side wall 4 is completed;
step five: condensation of the side wall 4: the side wall 4 is rotatably installed in the fixed framework, and concrete is solidified by rotating the side wall 4 and keeping a proper position;
step six: assembling the side wall 4: and assembling the condensed side wall 4 into the foundation 1, performing secondary pouring at the joint of the side wall 4 and the foundation 1, and naturally condensing concrete to completely construct the side wall 4 of the underground structure.
Preferably, in the first step, a fixing groove 2 is formed in the upper surface of one side of the foundation 4, and two fixing columns 3 are fixedly mounted in the fixing groove 2.
Preferably, the upper rotating holes 5 are formed in the upper portions of the left side and the right side of the side wall 4 in the fourth step, the lower fixing holes 6 are formed in the lower portions of the left side and the right side of the side wall 4, and the upper rotating holes 5 are rotatably mounted with the framework in the second step.
Preferably, the left side and the right side of the bottom of the side wall 4 in the fourth step are provided with butt joint holes 7, and the fixing columns 3 are in butt joint with the butt joint holes 7.
Preferably, in the fifth step, the condensation of the side wall 4 is fixed with the framework through the fixing holes 6 on the surface of the side wall 4, so that the side wall 4 is fixedly suspended in the air, and the fixing angle is adjusted according to the trend of sunlight.
Preferably, in the fifth step, after the side wall 4 is condensed, the template outside the side wall 4 is removed, and is condensed again, and the fixed angle is adjusted according to the sunlight direction in the condensation process.
Preferably, the cross section of the fixing groove 2 is L-shaped, which is beneficial to the assembly and stability of the side wall 4.
The difference between the third embodiment and the second embodiment is that in the fifth embodiment, after the side wall 4 is condensed, the formwork outside the side wall 4 is removed, and is condensed again, and the fixed angle is adjusted according to the sunlight direction in the process of condensing again, so that the side wall 4 can be quickly condensed, the construction of the side wall 4 is accelerated, and the working efficiency is improved.
Example four
Referring to fig. 1 to 4, a method for constructing a sidewall of an underground structure includes the following steps:
the method comprises the following steps: pouring of the foundation 1: installing a steel reinforcement framework on the ground according to a design drawing, and pouring concrete to complete the construction of the foundation 1;
step two: installation of the peripheral fixed framework of the side wall 4: a fixed framework is built outside the side wall 4 according to a design drawing;
step three: installing a side wall 4 steel reinforcement framework: installing a steel reinforcement framework on the formed arch ring according to a design drawing, and installing a template outside the steel reinforcement framework;
step four: and (3) casting the side wall 4 in the air: the template is rotatably arranged in the fixed framework, the template is placed in the air, concrete is poured into the template, and the construction of the side wall 4 is completed;
step five: condensation of the side wall 4: the side wall 4 is rotatably installed in the fixed framework, and concrete is solidified by rotating the side wall 4 and keeping a proper position;
step six: assembling the side wall 4: and assembling the condensed side wall 4 into the foundation 1, performing secondary pouring at the joint of the side wall 4 and the foundation 1, and naturally condensing concrete to completely construct the side wall 4 of the underground structure.
Preferably, in the first step, a fixing groove 2 is formed in the upper surface of one side of the foundation 4, and two fixing columns 3 are fixedly mounted in the fixing groove 2.
Preferably, the upper rotating holes 5 are formed in the upper portions of the left side and the right side of the side wall 4 in the fourth step, the lower fixing holes 6 are formed in the lower portions of the left side and the right side of the side wall 4, and the upper rotating holes 5 are rotatably mounted with the framework in the second step.
Preferably, the left side and the right side of the bottom of the side wall 4 in the fourth step are provided with butt joint holes 7, and the fixing columns 3 are in butt joint with the butt joint holes 7.
Preferably, in the fifth step, the condensation of the side wall 4 is fixed with the framework through the fixing holes 6 on the surface of the side wall 4, so that the side wall 4 is fixedly suspended in the air, and the fixing angle is adjusted according to the trend of sunlight.
Preferably, the cross section of the fixing groove 2 is L-shaped, which is beneficial to the assembly and stability of the side wall 4.
Preferably, after the secondary pouring of the side wall 4 in the sixth step is finished, the side wall is fixed with the framework through the fixing holes 6 until the concrete is completely condensed, and then the framework is dismantled.
The difference between the fourth embodiment and the second embodiment is that after the secondary pouring of the side wall 4 in the sixth step is completed, the side wall 4 is fixed with the framework through the fixing hole 6 until the concrete is completely condensed, and then the framework is removed, after the assembly of the side wall 4 is completed, the side wall 4 is fixed again until the concrete is condensed and then removed, so that the assembly of the side wall 4 and the foundation 1 is more stable, and the assembly effect is better.
According to the invention, the construction of the side wall of the underground structure is completed through the pouring of the foundation, the installation of the fixed framework at the periphery of the side wall, the installation of the reinforcement framework of the side wall, the air pouring of the side wall, the condensation of the side wall and the assembly of the side wall, so that the pouring of the side wall is completed in the air, and the angle can be adjusted in the air after the pouring is completed, thereby effectively accelerating the condensation of concrete, greatly improving the construction efficiency, shortening the construction time, saving manpower and material resources and effectively solving the defect of long construction period.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A construction method of an underground structure side wall is characterized by comprising the following steps:
the method comprises the following steps: pouring of the foundation (1): installing a steel reinforcement framework on the ground according to a design drawing, and pouring concrete to complete the construction of the foundation (1);
step two: installation of the peripheral fixed framework of the side wall (4): a fixed framework is built outside the side wall (4) according to a design drawing;
step three: side wall (4) framework of steel reinforcement's installation: installing a steel reinforcement framework on the formed arch ring according to a design drawing, and installing a template outside the steel reinforcement framework;
step four: casting the side wall (4) in the air: the template is rotatably arranged in the fixed framework, the template is placed in the air, concrete is poured into the template, and the construction of the side wall (4) is completed;
step five: condensation of the side wall (4): the side wall (4) is rotatably arranged in the fixed framework, and concrete is condensed by rotating the side wall (4) and keeping a proper position;
step six: assembling the side wall (4): and the side wall (4) after condensation is assembled into the foundation (1), secondary pouring is carried out at the joint of the side wall (4) and the foundation (1), natural condensation of concrete is carried out, and the construction of the side wall (4) of the underground structure is completed.
2. The construction method of the underground structure side wall according to claim 1, wherein in the first step, the upper surface of one side of the foundation (4) is provided with a fixing groove (2), and two fixing columns (3) are fixedly arranged in the fixing groove (2).
3. The method for constructing the side wall of the underground structure as claimed in claim 1, wherein upper rotating holes (5) are provided above the left and right sides of the side wall (4) in the fourth step, lower fixing holes (6) are provided below the left and right sides of the side wall (4), and the upper rotating holes (5) are rotatably mounted with the framework in the second step.
4. The construction method of the underground structure side wall according to claim 2, characterized in that the left and right sides of the bottom of the side wall (4) in the step four are provided with butt joint holes (7), and the fixing columns (3) are mutually butt jointed with the butt joint holes (7).
5. The construction method of the side wall of the underground structure as claimed in claim 1, wherein in the fifth step, the condensation of the side wall (4) is fixed with the framework through the fixing holes (6) on the surface of the side wall (4), so that the side wall (4) is fixedly suspended in the air, and the fixing angle is adjusted according to the direction of sunlight.
6. The construction method of the underground structure side wall according to claim 1, wherein in the fifth step, after the side wall (4) is coagulated, a template outside the side wall (4) is removed and is coagulated again, and the fixed angle is adjusted according to the sunlight direction in the process of coagulating again.
7. The method for constructing the side wall of the underground structure as claimed in claim 2, wherein the cross-section of the fixing groove (2) is L-shaped, which is beneficial to the assembly and the stability of the side wall (4).
8. The construction method of the underground structure side wall according to the claim 3, characterized in that after the secondary pouring of the sixth side wall (4) is completed, the sixth side wall is fixed with the framework through the fixing holes (6) until the framework is removed after the concrete is completely set.
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| CN202111443284.8A CN114045874A (en) | 2021-11-30 | 2021-11-30 | Construction method of underground structure side wall |
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| CN202111443284.8A CN114045874A (en) | 2021-11-30 | 2021-11-30 | Construction method of underground structure side wall |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044841A (en) * | 1989-02-08 | 1990-08-22 | 鲁比卡建筑系统有限公司 | Building construction system |
| JP2001152462A (en) * | 2000-09-21 | 2001-06-05 | Hiroshi Yamada | Footing structure of building and construction method therefor |
| CN207121928U (en) * | 2017-08-21 | 2018-03-20 | 昌大建筑科技有限公司 | A kind of new prefabricated assembled piping lane |
| CN108842892A (en) * | 2018-08-31 | 2018-11-20 | 江苏金贸科技发展有限公司 | A kind of assembled underground pipe gallery sewage conduct pressure well |
| CN111173028A (en) * | 2020-01-08 | 2020-05-19 | 浙江宏超建设集团有限公司 | Basement structure and construction method thereof |
| CN112049407A (en) * | 2020-09-11 | 2020-12-08 | 大峘集团有限公司 | Concrete building template for civil engineering |
| CN212948365U (en) * | 2020-05-31 | 2021-04-13 | 四川卓辅工程管理咨询有限公司 | Concrete mould for constructional engineering |
| CN214884467U (en) * | 2021-05-28 | 2021-11-26 | 甘肃建投建设有限公司 | Building structure design wall column base quick connecting device |
-
2021
- 2021-11-30 CN CN202111443284.8A patent/CN114045874A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044841A (en) * | 1989-02-08 | 1990-08-22 | 鲁比卡建筑系统有限公司 | Building construction system |
| JP2001152462A (en) * | 2000-09-21 | 2001-06-05 | Hiroshi Yamada | Footing structure of building and construction method therefor |
| CN207121928U (en) * | 2017-08-21 | 2018-03-20 | 昌大建筑科技有限公司 | A kind of new prefabricated assembled piping lane |
| CN108842892A (en) * | 2018-08-31 | 2018-11-20 | 江苏金贸科技发展有限公司 | A kind of assembled underground pipe gallery sewage conduct pressure well |
| CN111173028A (en) * | 2020-01-08 | 2020-05-19 | 浙江宏超建设集团有限公司 | Basement structure and construction method thereof |
| CN212948365U (en) * | 2020-05-31 | 2021-04-13 | 四川卓辅工程管理咨询有限公司 | Concrete mould for constructional engineering |
| CN112049407A (en) * | 2020-09-11 | 2020-12-08 | 大峘集团有限公司 | Concrete building template for civil engineering |
| CN214884467U (en) * | 2021-05-28 | 2021-11-26 | 甘肃建投建设有限公司 | Building structure design wall column base quick connecting device |
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Application publication date: 20220215 |