CN112982435A - Supporting construction is built to building engineering project foundation ditch - Google Patents
Supporting construction is built to building engineering project foundation ditch Download PDFInfo
- Publication number
- CN112982435A CN112982435A CN202110216988.5A CN202110216988A CN112982435A CN 112982435 A CN112982435 A CN 112982435A CN 202110216988 A CN202110216988 A CN 202110216988A CN 112982435 A CN112982435 A CN 112982435A
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- Prior art keywords
- plate
- block
- cover plate
- steel cover
- supporting
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
Abstract
The invention provides a supporting structure for foundation pit construction in a building engineering project, which comprises a steel cover plate, a pressing unit, a shielding unit, a turnover unit and a supporting unit, wherein the steel cover plate is fixedly connected with the pressing unit; the lower end surface of the steel cover plate is provided with a pressing unit in a movable connection mode; the middle part of the upper end surface of the steel cover plate is provided with a supporting unit in a movable connection mode; the shielding units are symmetrically arranged on the left and right sides of the upper end surface of the steel cover plate, and the folding units are symmetrically arranged in front of and behind the upper end surface of the steel cover plate; the supporting unit is matched with the shielding unit; the invention solves the problems that the cover plate which is mainly covered at the upper end of the foundation pit in the existing foundation pit protection is easy to loosen, so that personnel are easy to fall into the foundation pit, the safety of constructors and passing vehicles and pedestrians is influenced, the height of the existing foundation pit protection plate can not be adjusted, and the protection plate arranged around the foundation pit is easy to be influenced by strong wind, rain and snow weather to cause the protection plate to overturn; further generating a great deal of potential danger and the like.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a supporting structure for foundation pit construction of constructional engineering projects.
Background
The foundation pit support is a retaining, reinforcing and protecting measure adopted for the side wall of the foundation pit and the surrounding environment in order to ensure the safety of the construction of an underground structure and the surrounding environment of the foundation pit. At present, the apron is adopted around the foundation ditch more and is taken on the foundation ditch upper end to set up the warning sign in the foundation ditch periphery, but present foundation ditch protection mainly has following problem:
the cover plate covering the upper end of the foundation pit is easy to loosen, so that personnel can easily fall into the foundation pit, the safety of constructors and passing vehicles and pedestrians is affected, the height of the existing foundation pit protection plate cannot be adjusted, and the protection plate arranged around the foundation pit is easily affected by weather of strong wind, rain and snow to cause the protection plate to overturn; further creating a large number of potential hazards.
In order to ensure the stability of the cover plate, ensure the protection effect around the foundation pit and ensure the safety of constructors and passing vehicles and pedestrians around the foundation pit; the invention provides a supporting structure for foundation pit construction in a construction engineering project.
Disclosure of Invention
In order to achieve the purpose, the invention adopts the following technical scheme; a supporting structure for foundation pit construction of a construction engineering project comprises a steel cover plate, a pressing unit, a shielding unit, a turnover unit and a supporting unit; the steel cover plate is of a square structure, and a pressing unit is arranged on the lower end face of the steel cover plate in a movable connection mode; the middle part of the upper end surface of the steel cover plate is provided with a supporting unit in a movable connection mode; the shielding units are symmetrically arranged on the left and right sides of the upper end surface of the steel cover plate, and the folding units are symmetrically arranged in front of and behind the upper end surface of the steel cover plate; the supporting unit is matched with the shielding unit; wherein:
the pressing unit comprises an actuating motor, an actuating screw rod, a movable fixture block, an extrusion block and an anti-skid fixture block; the executing motor is a double-shaft motor; an output shaft of the execution motor is connected with a shaft head at one end of the execution lead screw through a coupler, and a shaft head at the other end of the execution lead screw is arranged on the inner wall of the lower end of the steel cover plate through a bearing; a movable fixture block is arranged on the outer wall of the execution screw rod in a threaded connection mode, an extrusion block is arranged on the outer wall of the lower end of the movable fixture block through a bolt, and an anti-skid fixture block is arranged on the outer wall of the extrusion block; the arranged pressing unit is convenient for controlling the movement of the movable fixture block so as to realize the expansion and fixation of the inner wall of the foundation pit, and the stability of the steel cover plate at the upper end of the foundation pit is further effectively improved; the steel cover plate is effectively prevented from moving.
The shielding unit comprises an adjusting cylinder, a lap joint sleeve block, a movable shaft rod, a shielding sleeve plate, a lifting cylinder, a partition plate, an adjusting pull rope, an auxiliary plate, a supporting cylinder and a mounting plate; the lap joint sleeve blocks are symmetrically arranged on the upper end face of the steel cover plate in a sliding fit mode, the adjusting cylinders are symmetrically arranged on the steel cover plate, the top ends of the adjusting cylinders are connected to the inner wall of the lap joint sleeve blocks, movable shaft rods are arranged on the lap joint sleeve blocks, the shielding sleeve plate is arranged on the outer wall of each movable shaft rod in a movable connection mode, lifting cylinders are arranged on the inner walls of the shielding sleeve plates, the top ends of the lifting cylinders are connected to the partition plate, and the partition plate is arranged inside the shielding sleeve plate in a sliding fit mode; the outer wall of the shielding sleeve plate is provided with an adjusting pull rope; the other end of the adjusting pull rope penetrates through the lap joint sleeve block and is connected to an auxiliary plate, and the auxiliary plate is installed at the top end of the supporting cylinder; the supporting cylinder is arranged on an installation plate, and the installation plate is arranged on a steel cover plate; the shielding height of the isolation plate can be conveniently adjusted by the shielding unit, so that the protection effect is improved, and the turning control of the shielding sleeve plate is realized by conveniently controlling and adjusting the pull rope through the work of the supporting cylinder.
Preferably; the turnover unit comprises a limiting shaft lever, a clamping block, a clamping spring and a blocking plate; the clamping blocks are uniformly arranged on the steel cover plate in a sliding fit mode, and clamping springs are arranged inside the steel cover plate and are matched with the clamping blocks; the limiting shaft levers are symmetrically arranged on the steel cover plate in a movable connection mode, limiting clamping grooves are uniformly formed in the outer walls of the shaft heads at two ends of each limiting shaft lever, and the clamping blocks are matched with the limiting clamping grooves of the limiting shaft levers; a blocking plate is arranged on the outer wall of the limiting shaft lever; the outer wall of the blocking plate is symmetrically provided with hand-pulled grooves; the baffle plate is convenient to turn over and position through the arranged turning-over unit, so that the fact that the turning-over unit and the shielding unit form a rectangular three-dimensional structure is effectively guaranteed, and the foundation pit is protected; the construction safety is ensured.
Preferably; the supporting unit comprises an electric sliding block, an auxiliary sleeve block, a telescopic cylinder and a supporting block; the electric sliding block is arranged in the middle of the upper end of the steel cover plate in a sliding fit mode, and an auxiliary sleeve block is arranged at the upper end of the electric sliding block; the auxiliary sleeve block is internally provided with a through hole, a bidirectional telescopic cylinder is arranged in the through hole of the auxiliary sleeve block, the top end of the telescopic cylinder is provided with a supporting block, and the arranged supporting unit works through the telescopic cylinder to adjust the supporting block to be in contact with and fixed with the inner wall of the shielding sleeve plate, so that the stability of the shielding sleeve plate is improved; the protective effect of the shielding sleeve plate is ensured.
Preferably; the outer wall of the supporting block is uniformly provided with anti-skidding grooves; the anti-skidding grooves are uniformly formed in the outer wall of the supporting block, so that the connecting strength between the supporting block and the inner wall of the shielding sleeve plate is guaranteed, and the protective effect of the shielding sleeve plate is guaranteed.
Preferably; the anti-skid fixture block is made of rubber; the anti-skid fixture block is made of rubber, so that the anti-skid fixture block is kept stable in the contact and fixation process with the inner wall of the foundation pit, and the connection strength between the anti-skid fixture block and the foundation pit is ensured.
Preferably; the lap joint sleeve block is of a U-shaped structure, and an L-shaped wire guide hole is formed in the lap joint sleeve block; the lapping sleeve block is arranged to be of a U-shaped structure, so that the shielding sleeve plate can be turned and positioned conveniently, and the shielding sleeve plate can be kept stable after being turned; the foundation pit is effectively protected.
The invention has the beneficial effects that:
the compaction unit is convenient to control the movable fixture block to move so as to realize the expansion and fixation of the inner wall of the foundation pit, and the stability of the steel cover plate at the upper end of the foundation pit is further effectively improved; the steel cover plate is effectively prevented from moving;
the shielding unit can conveniently adjust the protection height of the isolation plate, so that the protection effect is improved, and the supporting cylinder works to conveniently control the adjusting pull rope to realize the turnover control of the shielding sleeve plate;
the folding unit is arranged to facilitate the folding and positioning of the barrier plate, so that the rectangular three-dimensional structure formed by the folding unit and the shielding unit is effectively ensured, and the foundation pit is protected; the construction safety is ensured;
the supporting unit provided by the invention is in contact fixation with the inner wall of the shielding sleeve plate through the telescopic cylinder working adjustment supporting block, so that the stability of the shielding sleeve plate is improved; the protective effect of the shielding sleeve plate is ensured.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a top plan view of the present invention from a front view position;
FIG. 2 is a top view of the present invention;
FIG. 3 is an enlarged view of a portion of the invention at A in FIG. 1;
FIG. 4 is an enlarged view of a portion of the invention at B in FIG. 1;
FIG. 5 is an enlarged view of a portion of the invention at C of FIG. 2;
fig. 6 is a schematic perspective view of the overlapping block of the present invention.
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings. In this process, the width of the lines or the size of the components in the drawings may be exaggerated for clarity and convenience of description.
The following terms are defined based on the functions of the present invention, and may be different depending on the intention of the user or the operator or the convention. Therefore, these terms are defined based on the entire contents of the present specification.
As shown in fig. 1 to 6, a supporting structure for foundation pit construction of a construction engineering project comprises a steel cover plate 1, a pressing unit 2, a shielding unit 3, a folding unit 4 and a supporting unit 5; the steel cover plate 1 is of a square structure, and a pressing unit 2 is arranged on the lower end face of the steel cover plate 1 in a movable connection mode; the middle part of the upper end surface of the steel cover plate 1 is provided with a supporting unit 5 in a movable connection mode; the shielding units 3 are symmetrically arranged on the left and right sides of the upper end surface of the steel cover plate 1, and the folding units 4 are symmetrically arranged in front of and behind the upper end surface of the steel cover plate 1; the supporting unit 5 is matched with the shielding unit 3; wherein:
the pressing unit 2 comprises an actuating motor 21, an actuating screw 22, a movable clamping block 23, an extrusion block 24 and an anti-skid clamping block 25; the actuating motor 21 is a double-shaft motor; an output shaft of the execution motor 21 is connected with a shaft head at one end of an execution lead screw 22 through a coupler, and a shaft head at the other end of the execution lead screw 22 is arranged on the inner wall of the lower end of the steel cover plate 1 through a bearing; a movable fixture block 23 is arranged on the outer wall of the execution screw rod 22 in a threaded connection mode, an extrusion block 24 is arranged on the outer wall of the lower end of the movable fixture block 23 through a bolt, and an anti-skid fixture block 25 is arranged on the outer wall of the extrusion block 24; the anti-skid fixture block 25 is made of rubber; (ii) a The anti-skid fixture block 25 is made of rubber, so that the anti-skid fixture block 25 is kept stable in the process of contacting and fixing with the inner wall of the foundation pit, and the connection strength between the anti-skid fixture block 25 and the foundation pit is ensured; the arranged pressing unit 2 is convenient for controlling the movable fixture block 23 to move so as to realize the expansion and fixation of the inner wall of the foundation pit, and the stability of the steel cover plate 1 at the upper end of the foundation pit is further effectively improved; effectively preventing the steel cover plate 1 from moving.
The screening unit 3 comprises an adjusting cylinder 31, an overlapping sleeve block 32, a movable shaft rod 33, a screening sleeve plate 34, a lifting cylinder 35, a partition plate 36, an adjusting pull rope 37, an auxiliary plate 38, a supporting cylinder 39 and a mounting plate 30; the lap joint sleeve blocks 32 are symmetrically arranged on the upper end face of the steel cover plate 1 in a sliding fit mode, the lap joint sleeve blocks 32 are of U-shaped structures, and L-shaped wire holes are formed in the lap joint sleeve blocks 32; the overlapping sleeve block 32 is arranged to be in a U-shaped structure, so that the shielding sleeve plate 34 can be turned and positioned conveniently, and the shielding sleeve plate 34 can be kept stable after being turned; the foundation pit protection is effectively realized; the adjusting cylinders 31 are symmetrically arranged on the steel cover plate 1, the top ends of the adjusting cylinders 31 are connected to the inner wall of the lap joint sleeve block 32, the movable shaft rods 33 are arranged on the lap joint sleeve block 32, the shielding sleeve plate 34 is arranged on the outer wall of the movable shaft rods 33 in a movable connection mode, the lifting cylinders 35 are arranged on the inner wall of the shielding sleeve plate 34, the top ends of the lifting cylinders 35 are connected to the partition plate 36, and the partition plate 36 is arranged inside the shielding sleeve plate 34 in a sliding fit mode; an adjusting pull rope 37 is arranged on the outer wall of the shielding sleeve plate 34; the other end of the adjusting pull rope 37 penetrates through the lapping sleeve block 32 to be connected to an auxiliary plate 38, and the auxiliary plate 38 is installed at the top end of a supporting cylinder 39; the supporting cylinder 39 is arranged on the mounting plate 30, and the mounting plate 30 is arranged on the steel cover plate 1; the shielding unit 3 is arranged to conveniently adjust the protection height of the isolation plate 36, thereby improving the protection effect, and the supporting cylinder 39 works to conveniently control the adjusting pull rope 37 to realize the turnover control of the shielding sleeve plate 34.
The folding unit 4 comprises a limiting shaft rod 41, a clamping block 42, a clamping spring 43 and a blocking plate 44; the clamping blocks 42 are uniformly arranged on the steel cover plate 1 in a sliding fit mode, and clamping springs 43 are arranged inside the steel cover plate 1 and matched with the clamping blocks 42; the limiting shaft levers 41 are symmetrically arranged on the steel cover plate 1 in a movable connection mode, limiting clamping grooves are uniformly formed in the outer walls of the shaft heads at two ends of the limiting shaft levers 41, and the clamping blocks 42 are matched with the limiting clamping grooves of the limiting shaft levers 41; a blocking plate 44 is arranged on the outer wall of the limiting shaft rod 41; the outer wall of the blocking plate 44 is symmetrically provided with a hand-pulling groove; the baffle plate 44 is convenient to fold and position through the arranged folding unit 4, so that the fact that the folding unit 4 and the shielding unit 3 form a rectangular three-dimensional structure is effectively guaranteed, and the foundation pit is protected; the construction safety is ensured.
The supporting unit 5 comprises an electric slider 51, an auxiliary sleeve block 52, a telescopic cylinder 53 and a supporting block 54; the electric sliding block 51 is arranged in the middle of the upper end of the steel cover plate 1 in a sliding fit mode, and an auxiliary sleeve block 52 is arranged at the upper end of the electric sliding block 51; a through hole is formed in the auxiliary sleeve block 52, a bidirectional telescopic cylinder 53 is arranged in the through hole of the auxiliary sleeve block 52, a supporting block 54 is installed at the top end of the telescopic cylinder 53, and anti-skid grooves are uniformly formed in the outer wall of the supporting block 54; the anti-skid grooves are uniformly formed in the outer wall of the supporting block 54, so that the connection strength between the supporting block 54 and the inner wall of the shielding sleeve plate 34 is ensured, and the protection effect of the shielding sleeve plate 34 is ensured; the supporting unit 5 is fixed in contact with the inner wall of the shield sleeve plate 34 through the working adjustment supporting block 54 of the telescopic cylinder 53, so that the stability of the shield sleeve plate 34 is improved; the protective effect of the shield shell 3 is ensured.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A supporting structure for foundation pit construction of a construction engineering project comprises a steel cover plate (1), a pressing unit (2), a shielding unit (3), a turnover unit (4) and a supporting unit (5); the method is characterized in that: the steel cover plate (1) is of a square structure, and a pressing unit (2) is arranged on the lower end face of the steel cover plate (1) in a movable connection mode; the middle part of the upper end surface of the steel cover plate (1) is provided with a supporting unit (5) in a movable connection mode; the shielding units (3) are symmetrically arranged on the left and right sides of the upper end surface of the steel cover plate (1), and the folding units (4) are symmetrically arranged in front of and behind the upper end surface of the steel cover plate (1); the supporting unit (5) is matched with the shielding unit (3); wherein:
the pressing unit (2) comprises an actuating motor (21), an actuating screw rod (22), a movable clamping block (23), an extrusion block (24) and an anti-skid clamping block (25); the actuating motor (21) is a double-shaft motor; an output shaft of the execution motor (21) is connected with a shaft head at one end of the execution lead screw (22) through a coupler, and a shaft head at the other end of the execution lead screw (22) is arranged on the inner wall of the lower end of the steel cover plate (1) through a bearing; a movable clamping block (23) is arranged on the outer wall of the execution screw rod (22) in a threaded connection mode, an extrusion block (24) is arranged on the outer wall of the lower end of the movable clamping block (23) through a bolt, and an anti-skid clamping block (25) is arranged on the outer wall of the extrusion block (24);
the shielding unit (3) comprises an adjusting cylinder (31), an overlapping sleeve block (32), a movable shaft rod (33), a shielding sleeve plate (34), a lifting cylinder (35), a partition plate (36), an adjusting pull rope (37), an auxiliary plate (38), a supporting cylinder (39) and a mounting plate (30); the lap joint sleeve block (32) is symmetrically arranged on the upper end face of the steel cover plate (1) in a sliding fit mode, the adjusting cylinders (31) are symmetrically arranged on the steel cover plate (1), the top ends of the adjusting cylinders (31) are connected to the inner wall of the lap joint sleeve block (32), movable shaft rods (33) are arranged on the lap joint sleeve block (32), the shielding sleeve plate (34) is arranged on the outer wall of each movable shaft rod (33) in a movable connection mode, lifting cylinders (35) are arranged on the inner wall of the shielding sleeve plate (34), the top ends of the lifting cylinders (35) are connected to the partition plate (36), and the partition plate (36) is arranged inside the shielding sleeve plate (34) in a sliding fit mode; an adjusting pull rope (37) is arranged on the outer wall of the shielding sleeve plate (34); the other end of the adjusting pull rope (37) penetrates through the lapping sleeve block (32) to be connected to an auxiliary plate (38), and the auxiliary plate (38) is installed at the top end of the supporting cylinder (39); the supporting cylinder (39) is arranged on the mounting plate (30), and the mounting plate (30) is arranged on the steel cover plate (1).
2. The construction engineering project foundation pit construction supporting structure of claim 1, wherein: the turnover unit (4) comprises a limiting shaft rod (41), a clamping block (42), a clamping spring (43) and a blocking plate (44); the clamping blocks (42) are uniformly arranged on the steel cover plate (1) in a sliding fit mode, and clamping springs (43) are arranged inside the steel cover plate (1) and are matched with the clamping blocks (42); the limiting shaft levers (41) are symmetrically arranged on the steel cover plate (1) in a movable connection mode, limiting clamping grooves are uniformly formed in the outer walls of shaft heads at two ends of each limiting shaft lever (41), and the clamping blocks (42) are matched with the limiting clamping grooves of the limiting shaft levers (41); a blocking plate (44) is arranged on the outer wall of the limiting shaft lever (41); the outer wall of the blocking plate (44) is symmetrically provided with hand-pulled grooves.
3. The construction engineering project foundation pit construction supporting structure of claim 1, wherein: the supporting unit (5) comprises an electric slider (51), an auxiliary sleeve block (52), a telescopic cylinder (53) and a supporting block (54); the electric sliding block (51) is arranged in the middle of the upper end of the steel cover plate (1) in a sliding fit mode, and an auxiliary sleeve block (52) is arranged at the upper end of the electric sliding block (51); a through hole is formed in the auxiliary sleeve block (52) in a penetrating mode, a bidirectional telescopic cylinder (53) is arranged in the through hole in the auxiliary sleeve block (52), and a supporting block (54) is installed at the top end of the telescopic cylinder (53).
4. A construction engineering project pit construction supporting construction according to claim 3, characterized in that: and anti-skidding grooves are uniformly formed in the outer wall of the supporting block (54).
5. The construction engineering project foundation pit construction supporting structure of claim 1, wherein: the anti-skid fixture block (25) is made of rubber.
6. The construction engineering project foundation pit construction supporting structure of claim 1, wherein: the lap joint sleeve block (32) is of a U-shaped structure, and an L-shaped wire guide hole is formed in the lap joint sleeve block (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110216988.5A CN112982435B (en) | 2021-02-26 | 2021-02-26 | Supporting construction is built to building engineering project foundation ditch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110216988.5A CN112982435B (en) | 2021-02-26 | 2021-02-26 | Supporting construction is built to building engineering project foundation ditch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112982435A true CN112982435A (en) | 2021-06-18 |
| CN112982435B CN112982435B (en) | 2022-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110216988.5A Active CN112982435B (en) | 2021-02-26 | 2021-02-26 | Supporting construction is built to building engineering project foundation ditch |
Country Status (1)
| Country | Link |
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| CN (1) | CN112982435B (en) |
Citations (9)
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| CN101235649A (en) * | 2008-02-22 | 2008-08-06 | 上海市政工程设计研究总院 | Covered digging system for pit |
| JP2009057680A (en) * | 2007-08-29 | 2009-03-19 | Ohbayashi Corp | Structure and method for supporting covering plate |
| KR20100096386A (en) * | 2009-02-24 | 2010-09-02 | 김성규 | Angle adjustment bracket |
| CN103485550A (en) * | 2013-09-23 | 2014-01-01 | 江苏金土木建设集团有限公司 | Reusable reserved hole protection device |
| CN205805011U (en) * | 2016-07-20 | 2016-12-14 | 思百危实业（上海）有限公司 | New type of safe preventer cover plate |
| CN207700725U (en) * | 2017-12-08 | 2018-08-07 | 广宏建设集团有限公司 | A kind of movable type loop bar reserved opening protective cover plate |
| CN209260719U (en) * | 2018-12-12 | 2019-08-16 | 重庆中航建设（集团）有限公司 | A kind of building foundation pit installation guardrail |
| CN110528424A (en) * | 2019-09-16 | 2019-12-03 | 黄艳梅 | A kind of Highway Municipal guardrail and its construction method |
| CN110939284A (en) * | 2019-11-09 | 2020-03-31 | 上海建工四建集团有限公司 | Construction method of folding safety barrier device |
-
2021
- 2021-02-26 CN CN202110216988.5A patent/CN112982435B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009057680A (en) * | 2007-08-29 | 2009-03-19 | Ohbayashi Corp | Structure and method for supporting covering plate |
| CN101235649A (en) * | 2008-02-22 | 2008-08-06 | 上海市政工程设计研究总院 | Covered digging system for pit |
| KR20100096386A (en) * | 2009-02-24 | 2010-09-02 | 김성규 | Angle adjustment bracket |
| CN103485550A (en) * | 2013-09-23 | 2014-01-01 | 江苏金土木建设集团有限公司 | Reusable reserved hole protection device |
| CN205805011U (en) * | 2016-07-20 | 2016-12-14 | 思百危实业（上海）有限公司 | New type of safe preventer cover plate |
| CN207700725U (en) * | 2017-12-08 | 2018-08-07 | 广宏建设集团有限公司 | A kind of movable type loop bar reserved opening protective cover plate |
| CN209260719U (en) * | 2018-12-12 | 2019-08-16 | 重庆中航建设（集团）有限公司 | A kind of building foundation pit installation guardrail |
| CN110528424A (en) * | 2019-09-16 | 2019-12-03 | 黄艳梅 | A kind of Highway Municipal guardrail and its construction method |
| CN110939284A (en) * | 2019-11-09 | 2020-03-31 | 上海建工四建集团有限公司 | Construction method of folding safety barrier device |
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| Publication number | Publication date |
|---|---|
| CN112982435B (en) | 2022-06-03 |
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Effective date of registration: 20220513 Address after: 255000 No.49 Zhongrun Avenue, high tech Zone, Zibo City, Shandong Province Applicant after: Shandong Expressway Geotechnical Engineering Co.,Ltd. Address before: 221002 No.36, Huaihai West Road, Xuzhou City, Jiangsu Province Applicant before: Yan Fanglin |
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