CN112012221A - Adjustable rectangle supporting device of geotechnical engineering - Google Patents
Adjustable rectangle supporting device of geotechnical engineering Download PDFInfo
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- CN112012221A CN112012221A CN202010849242.3A CN202010849242A CN112012221A CN 112012221 A CN112012221 A CN 112012221A CN 202010849242 A CN202010849242 A CN 202010849242A CN 112012221 A CN112012221 A CN 112012221A
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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
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Abstract
The invention discloses an adjustable rectangular supporting device for geotechnical engineering, which comprises a rectangular shell, wherein a rectangular groove is formed in the upper surface of the rectangular shell, a supporting plate is movably connected to the bottom end of the front surface of the rectangular shell through a hinge, a first U-shaped rotating block is fixedly connected to the front surface of the rectangular shell, a through hole is formed in the side surface of the first U-shaped rotating block, a first rotating shaft is rotatably connected to the inner wall of the through hole, a connecting rod is sleeved on the surface of the first rotating shaft, and a convex sliding groove is formed in the upper surface of the supporting plate. This adjustable rectangle supporting device of geotechnical engineering through setting up rectangle casing, backup pad, I shape sliding block, first U-shaped turning block, second U-shaped turning block, locking bolt and connecting rod, is convenient for screw up locking bolt and makes the I shape sliding block fixed to make two connecting rods support rectangle casing and backup pad, structural strength is bigger, can effectually prevent that the foundation ditch from collapsing, protection rock engineer's safety.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to an adjustable rectangular supporting device for geotechnical engineering.
Background
Geotechnical engineering, also known as soil engineering and geoengineering, mainly studies the engineering characteristics of soil constituent substances, and is a new technical system established in civil engineering practice in the 60 s of the 20 th century in the countries of the Europe and America. Geotechnical engineering is to solve the problems of rock and soil engineering, including foundation and foundation, slope, underground engineering and the like, and is used as a research object of the geotechnical engineering. A geotechnical engineer will study the data in soil and rock samples collected from a worksite and then calculate the lattice required for construction on the worksite.
Geotechnical engineer carries out earth and rock to the foundation ditch and carries out the sampling during operation, develops for the safety of collection work, often needs prevent that the foundation ditch from collapsing at the side-mounting supporting device of foundation ditch, guarantee geotechnical engineer's life safety.
Present supporting device mainly prevents that the foundation ditch from collapsing through plank and wooden bearing diagonal pole binding together, and such supporting device intensity is not enough, still has the potential safety hazard, seriously threatens geotechnique engineer's life safety.
Therefore, the adjustable rectangular supporting device for the geotechnical engineering is provided.
Disclosure of Invention
The invention aims to provide an adjustable rectangular supporting device for geotechnical engineering, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an adjustable rectangular supporting device for geotechnical engineering, which comprises a rectangular shell, wherein a rectangular groove is arranged on the upper surface of the rectangular shell, the bottom end of the front surface of the rectangular shell is movably connected with a supporting plate through a hinge, the front surface of the rectangular shell is fixedly connected with a first U-shaped rotating block, the side surface of the first U-shaped rotating block is provided with a through hole, and the inner wall of the through hole is rotatably connected with a first rotating shaft, the surface of the first rotating shaft is sleeved with a connecting rod, the upper surface of the supporting plate is provided with a convex chute, and the inner wall of the convex chute is connected with an I-shaped sliding block in a sliding way, the upper surface of the I-shaped sliding block is fixedly connected with a second U-shaped rotating block, and a circular through hole is formed in the side face of the second U-shaped rotating block, the inner wall of the through hole is rotatably connected with a second rotating shaft, and the surface of the second rotating shaft is rotatably connected with one end, far away from the first rotating shaft, of the connecting rod.
Preferably, the lower surface of the rectangular shell is fixedly connected with two conical fixing columns, and the two conical fixing columns are symmetrically arranged at the corners of the two ends of the lower surface of the rectangular shell by taking the center line of the front surface of the rectangular shell as a symmetry axis.
Preferably, the inner wall of the rectangular groove formed in the upper surface of the rectangular shell is slidably connected with a rectangular lifting block, the inner wall of the rectangular groove formed in the upper surface of the rectangular shell is provided with a circular groove, the inner wall of the circular groove is slidably connected with a lifting column, the top end of the lifting column is fixedly connected with the lower surface of the rectangular lifting block, the inner bottom wall of the circular groove is fixedly connected with a turntable bearing seat, the inner annular surface of the turntable bearing seat is fixedly connected with a bevel gear, the upper surface of the bevel gear is fixedly connected with a T-shaped groove screw rod, the bottom end of the lifting column is provided with a threaded hole matched with the T-shaped groove screw rod, and the surface of the T-shaped groove screw rod is in threaded connection with the inner.
Preferably, the right side fixedly connected with type-convex connecting block of the rectangular shell, the left side fixedly connected with rectangular fixed block of the rectangular shell, and the upper surface of the rectangular fixed block is provided with a clamping groove matched with the type-convex connecting block.
Preferably, the fixed orifices that extends to circular recess inner wall is seted up in the front of rectangle casing, and the inner wall fixedly connected with bearing of this fixed orifices, the interior anchor ring fixedly connected with dwang of bearing, the one end fixedly connected with bevel pinion of dwang, and bevel pinion and big bevel gear meshing are connected, the one end fixedly connected with that bevel pinion was kept away from to the dwang waves the handle, the surface cover that waves the handle is equipped with the foaming sponge grab handle.
Preferably, the number of the connecting rods is two, and the two connecting rods are symmetrically arranged on the front face of the rectangular shell by taking the center line of the front face of the rectangular shell as a symmetry axis.
Preferably, the upper surface of the I-shaped sliding block is provided with a locking threaded hole, the inner wall of the locking threaded hole is in threaded connection with a locking bolt, and one end of the locking bolt is in lap joint with the inner bottom wall of the convex chute formed in the upper surface of the supporting plate.
Preferably, the front surface of the supporting plate is provided with a through groove matched with the shaking handle, and four corners of the lower surface of the supporting plate are fixedly connected with fixed anti-slip columns.
Advantageous effects
The invention provides an adjustable rectangular supporting device for geotechnical engineering, which has the following beneficial effects:
1. this adjustable rectangle supporting device of geotechnical engineering, through setting up the rectangle casing, the backup pad, the I shape sliding block, first U-shaped turning block, second U-shaped turning block, locking bolt and connecting rod, be convenient for rotate the backup pad, it is fixed with ground to make the backup pad, and drive the I shape sliding block and slide in the type of protruding spout of backup pad, it makes the I shape sliding block fixed to screw up the locking bolt again, thereby make two connecting rods support rectangle casing and backup pad, structural strength is bigger, can effectually prevent the foundation ditch collapse, protect rock engineer's safety.
2. According to the geotechnical engineering adjustable rectangular supporting device, the shaking handle, the bevel pinion, the bevel bull gear, the T-shaped groove screw and the lifting column are arranged, so that the bevel pinion drives the bevel bull gear to rotate due to rotation of the shaking handle, the T-shaped groove screw rotates in a threaded hole formed in the bottom end of the lifting column, the lifting column moves upwards to drive the rectangular lifting block to move, and therefore the geotechnical engineering adjustable rectangular supporting device can be adjusted in height and is more flexible to use.
3. This adjustable rectangle supporting device of geotechnical engineering through setting up type connecting block and rectangle fixed block, is convenient for according to the size of foundation ditch, is in the same place the draw-in groove joint that the type connecting block and the rectangle fixed block upper surface of a plurality of adjustable rectangle supporting device of geotechnical engineering were seted up to can splice into a whole, make holistic structure firm more.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic side sectional view of the present invention;
FIG. 4 is an enlarged view of a portion A of FIG. 3;
FIG. 5 is a schematic sectional view of M-M in FIG. 2.
In the figure: the anti-skid device comprises a rectangular shell 1, a supporting plate 2, a first U-shaped rotating block 3, a connecting rod 4, an I-shaped sliding block 5, a second U-shaped rotating block 6, a conical fixing column 7, a rectangular lifting block 8, a circular groove 9, a lifting column 10, a turntable bearing seat 11, a large bevel gear 12, a T-shaped groove screw rod 13, a convex connecting block 14, a rectangular fixing block 15, a bearing 16, a rotating rod 17, a small bevel gear 18, a rocking handle 19, a locking bolt 20 and a fixed anti-skid column 21.
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.
Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides an adjustable rectangle supporting device of geotechnical engineering, includes rectangular housing 1, and rectangular housing 1's lower fixed surface is connected with toper fixed column 7, and the quantity of toper fixed column 7 is two, and two toper fixed columns 7 use the positive central line of rectangular housing 1 to set up in rectangular housing 1's lower surface both ends edge department as symmetry axis symmetry, and the setting of toper fixed column 7 is convenient for toper fixed column 7 pricks into ground and makes this adjustable rectangle supporting device of geotechnical engineering fixed firm.
The right side fixedly connected with type of projection connecting block 14 of rectangular casing 1, the left side fixedly connected with rectangle fixed block 15 of rectangular casing 1, and the upper surface of rectangle fixed block 15 set up with the draw-in groove of type of projection connecting block 14 looks adaptation, through setting up type of projection connecting block 14 and rectangle fixed block 15, be convenient for according to the size of foundation ditch, the draw-in groove joint that the type of projection connecting block 14 and the 15 upper surface of rectangle fixed block of the adjustable rectangle supporting device of a plurality of geotechnical engineering were seted up is in the same place, thereby can splice into a whole, make holistic structure more firm.
Rectangular groove has been seted up to the upper surface of rectangular housing 1, the rectangular groove inner wall sliding connection that rectangular housing 1 upper surface was seted up has rectangle elevator 8, circular recess 9 has been seted up to the rectangular groove inner wall that rectangular housing 1 upper surface was seted up, and the inner wall sliding connection of circular recess 9 has lift post 10, and the top of lift post 10 and the lower fixed surface of rectangle elevator 8 are connected, the inner diapire fixedly connected with carousel bearing frame 11 of circular recess 9, the interior anchor ring of carousel bearing frame 11 is connected with big bevel gear 12, the last fixed surface of big bevel gear 12 is connected with T-slot screw 13, the screw hole with T-slot screw 13 looks adaptation is seted up to the bottom of lift post 10, and the screw hole inner wall threaded connection that the lower surface of T-slot screw 13 and lift post 10 was seted up.
The front surface of the rectangular shell 1 is provided with a fixing hole extending to the inner wall of the circular groove 9, the inner wall of the fixing hole is fixedly connected with a bearing 16, the inner annular surface of the bearing 16 is fixedly connected with a rotating rod 17, one end of the rotating rod 17 is fixedly connected with a small bevel gear 18, the small bevel gear 18 is meshed with a large bevel gear 12, one end of the rotating rod 17 far away from the small bevel gear 18 is fixedly connected with a shaking handle 19, the surface of the shaking handle 19 is sleeved with a foam sponge grab handle, through the arrangement of the shaking handle 19, the small bevel gear 18, the large bevel gear 12, a T-shaped groove screw 13 and a lifting column 10, the rotation of the shaking handle 19 enables the small bevel gear 18 to drive the large bevel gear 12 to rotate, the T-shaped groove screw 13 rotates in a threaded hole arranged at the bottom end of the lifting column 10, the lifting column 10 moves upwards to drive the rectangular lifting block 8 to move, the use is more flexible.
The positive bottom of rectangular housing 1 has backup pad 2 through hinge swing joint, and the logical groove with wave 19 looks adaptations of handle is seted up and is waved in the front of backup pad 2, and the equal fixedly connected with antiskid column 21 of lower surface four corners department of backup pad 2, the setting of fixed protection column 21 can prevent this geotechnical engineering adjustable rectangle supporting device 2 at the in-process backup pad of support skew that slides.
The front of rectangular housing 1 is fixedly connected with first U-shaped turning block 3, and the through-hole has been seted up to the side of first U-shaped turning block 3, and the inner wall of this through-hole rotates and is connected with first axis of rotation, and the surface cover of first axis of rotation is equipped with connecting rod 4, and the quantity of connecting rod 4 is two, and two connecting rods 4 use the positive central line of rectangular housing 1 to set up in the front of rectangular housing 1 as symmetry axis symmetry.
The convex chute has been seted up to the upper surface of backup pad 2, and the inner wall sliding connection of this convex chute has I-shaped sliding block 5, and locking screw hole has been seted up to the upper surface of I-shaped sliding block 5, and the inner wall threaded connection of this locking screw hole has locking bolt 20, and the bottom wall overlap joint in the convex chute that the one end of locking bolt 20 and backup pad 2 upper surface were seted up.
The upper surface of the I-shaped sliding block 5 is fixedly connected with a second U-shaped rotating block 6, the side surface of the second U-shaped rotating block 6 is provided with a circular through hole, the inner wall of the through hole is rotatably connected with a second rotating shaft, the surface of the second rotating shaft is rotatably connected with one end, far away from the first rotating shaft, of the connecting rod 4, the rectangular shell 1, the supporting plate 2, the I-shaped sliding block 5, the first U-shaped rotating block 3, the second U-shaped rotating block 6, the locking bolt 20 and the connecting rod 4 are arranged, so that the supporting plate 2 can be conveniently rotated, the supporting plate 2 is fixed with the ground, the I-shaped sliding block 5 is driven to slide in the convex chute of the supporting plate 2, and then the locking bolt 20 is screwed to fix the I-shaped sliding block 5, so that the rectangular shell 1 and the supporting plate 2 are supported by the two connecting rods 4, the structural strength is higher, meanwhile, the geotechnical engineering adjustable rectangular supporting device can adjust the angles of the supporting block 2 and the rectangular shell 1 according to the angles of the foundation pit and the ground, so that the geotechnical engineering adjustable rectangular supporting device is more convenient, and the space is saved by a folding mode.
The working principle is as follows: when the geotechnical engineering adjustable rectangular supporting device is used, the device is firstly carried into a foundation pit, then the supporting plate 2 is outwards rotated to the angle between the foundation pit and the ground, when the supporting plate 2 is rotated, the I-shaped sliding block 5 slides in the convex-shaped sliding groove formed in the upper surface of the supporting plate 2, then the locking bolt 20 is tightened, the rectangular shell 1 and the supporting plate 2 are supported by the two connecting rods 4, then the device is moved to the side of the foundation pit, the conical fixing column 7 is deeply fixed to the ground, the shaking handle 19 is simultaneously rotated, the lifting column 10 is jacked up by the lifting column 19 through the rotation of the shaking handle 19 to stop after reaching the proper height, then the convex-shaped connecting blocks 14 of the device and the clamping grooves of the rectangular fixing blocks 15 are clamped together according to the width of the foundation pit, through the geotechnical engineering adjustable rectangular supporting device, the structural strength is higher, the foundation pit collapse can be effectively, the safety of rock engineers is protected, the folding is convenient, and the space is saved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides an adjustable rectangle supporting device of geotechnical engineering, includes rectangle casing (1), its characterized in that: a rectangular groove is arranged on the upper surface of the rectangular shell (1), the bottom end of the front surface of the rectangular shell (1) is movably connected with a supporting plate (2) through a hinge, the front surface of the rectangular shell (1) is fixedly connected with a first U-shaped rotating block (3), the side surface of the first U-shaped rotating block (3) is provided with a through hole, and the inner wall of the through hole is rotationally connected with a first rotating shaft, the surface of the first rotating shaft is sleeved with a connecting rod (4), the upper surface of the supporting plate (2) is provided with a convex chute, the inner wall of the convex chute is connected with an I-shaped sliding block (5) in a sliding way, the upper surface of the I-shaped sliding block (5) is fixedly connected with a second U-shaped rotating block (6), and the side surface of the second U-shaped rotating block (6) is provided with a circular through hole, and the inner wall of the through hole is rotatably connected with a second rotating shaft, and the surface of the second rotating shaft is rotatably connected with one end of the connecting rod (4) far away from the first rotating shaft.
2. The geotechnical engineering adjustable rectangular support device according to claim 1, which is characterized in that: the lower surface of the rectangular shell (1) is fixedly connected with two conical fixing columns (7), the number of the conical fixing columns (7) is two, and the two conical fixing columns (7) are symmetrically arranged at the corners of the two ends of the lower surface of the rectangular shell (1) by taking the center line of the front surface of the rectangular shell (1) as a symmetry axis.
3. The geotechnical engineering adjustable rectangular support device according to claim 1, which is characterized in that: the inner wall of a rectangular groove arranged on the upper surface of the rectangular shell (1) is connected with a rectangular lifting block (8) in a sliding way, a circular groove (9) is arranged on the inner bottom wall of the rectangular groove arranged on the upper surface of the rectangular shell (1), the inner wall of the round groove (9) is connected with a lifting column (10) in a sliding way, the top end of the lifting column (10) is fixedly connected with the lower surface of the rectangular lifting block (8), the inner bottom wall of the circular groove (9) is fixedly connected with a turntable bearing seat (11), a big bevel gear (12) is fixedly connected with the inner ring surface of the turntable bearing seat (11), the upper surface of the big bevel gear (12) is fixedly connected with a T-shaped groove screw rod (13), the bottom end of the lifting column (10) is provided with a threaded hole matched with the T-shaped groove screw rod (13), and the surface of the T-shaped groove screw rod (13) is in threaded connection with the inner wall of a threaded hole formed in the lower surface of the lifting column (10).
4. The geotechnical engineering adjustable rectangular support device according to claim 1, which is characterized in that: the right side fixedly connected with type-protruding connecting block (14) of rectangle casing (1), the left side fixedly connected with rectangle fixed block (15) of rectangle casing (1), and the draw-in groove with type-protruding connecting block (14) looks adaptation is seted up to the upper surface of rectangle fixed block (15).
5. The geotechnical engineering adjustable rectangular support device according to claim 1, which is characterized in that: the fixed orifices that extends to circular recess (9) inner wall is seted up in the front of rectangle casing (1), and the inner wall fixedly connected with bearing (16) of this fixed orifices, the interior anchor ring fixedly connected with dwang (17) of bearing (16), the one end fixedly connected with bevel pinion (18) of dwang (17), and bevel pinion (18) and big bevel gear (12) meshing are connected, the one end fixedly connected with that bevel pinion (18) were kept away from in dwang (17) waves handle (19), the surperficial cover that waves handle (19) is equipped with the foaming sponge grab handle.
6. The geotechnical engineering adjustable rectangular support device according to claim 1, which is characterized in that: the number of the connecting rods (4) is two, and the two connecting rods (4) are symmetrically arranged on the front surface of the rectangular shell (1) by taking the central line of the front surface of the rectangular shell (1) as a symmetry axis.
7. The geotechnical engineering adjustable rectangular support device according to claim 1, which is characterized in that: the upper surface of the I-shaped sliding block (5) is provided with a locking threaded hole, the inner wall of the locking threaded hole is in threaded connection with a locking bolt (20), and one end of the locking bolt (20) is in lap joint with the inner bottom wall of the convex-shaped sliding groove formed in the upper surface of the supporting plate (2).
8. The geotechnical engineering adjustable rectangular support device according to claim 1, which is characterized in that: the front of backup pad (2) is seted up and is waved logical groove of handle (19) looks adaptation, the equal fixedly connected with antiskid post (21) of lower surface four corners department of backup pad (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010849242.3A CN112012221A (en) | 2020-08-21 | 2020-08-21 | Adjustable rectangle supporting device of geotechnical engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010849242.3A CN112012221A (en) | 2020-08-21 | 2020-08-21 | Adjustable rectangle supporting device of geotechnical engineering |
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| Publication Number | Publication Date |
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| CN112012221A true CN112012221A (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010849242.3A Pending CN112012221A (en) | 2020-08-21 | 2020-08-21 | Adjustable rectangle supporting device of geotechnical engineering |
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| CN (1) | CN112012221A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112442992A (en) * | 2020-12-04 | 2021-03-05 | 饶培明 | Engineering planning is with having foundation ditch lateral wall supporting device who accomodates supporting mechanism |
| CN112482305A (en) * | 2020-12-04 | 2021-03-12 | 河南浦腾实业有限公司 | Hydraulic engineering wall body flood fighting device |
| CN113653066A (en) * | 2021-08-23 | 2021-11-16 | 中铁城建集团第一工程有限公司 | Foundation pit slope supporting structure |
| CN113818449A (en) * | 2021-10-13 | 2021-12-21 | 广东一新长城建筑集团有限公司 | Supporting structure for integrated prefabricated pump station well sinking and construction method applying supporting structure |
| CN114059549A (en) * | 2021-10-21 | 2022-02-18 | 温州职业技术学院 | Special foundation ditch protective structure of soft foundation building |
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| CN207538044U (en) * | 2017-12-02 | 2018-06-26 | 江苏惠淳建设有限公司 | A kind of adjustable throw supports suspension device |
| CN207812459U (en) * | 2018-01-23 | 2018-09-04 | 广州市房屋开发建设有限公司 | Foundation pit supporting construction |
| CN208792341U (en) * | 2018-09-19 | 2019-04-26 | 唐仁 | A kind of adjustable rectangle suspension device of geotechnical engineering |
| CN211080249U (en) * | 2019-10-31 | 2020-07-24 | 广州龙达工程管理有限公司 | A be convenient for adjust formula supporting construction for construction |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207538044U (en) * | 2017-12-02 | 2018-06-26 | 江苏惠淳建设有限公司 | A kind of adjustable throw supports suspension device |
| CN207812459U (en) * | 2018-01-23 | 2018-09-04 | 广州市房屋开发建设有限公司 | Foundation pit supporting construction |
| CN208792341U (en) * | 2018-09-19 | 2019-04-26 | 唐仁 | A kind of adjustable rectangle suspension device of geotechnical engineering |
| CN211080249U (en) * | 2019-10-31 | 2020-07-24 | 广州龙达工程管理有限公司 | A be convenient for adjust formula supporting construction for construction |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112442992A (en) * | 2020-12-04 | 2021-03-05 | 饶培明 | Engineering planning is with having foundation ditch lateral wall supporting device who accomodates supporting mechanism |
| CN112482305A (en) * | 2020-12-04 | 2021-03-12 | 河南浦腾实业有限公司 | Hydraulic engineering wall body flood fighting device |
| CN113653066A (en) * | 2021-08-23 | 2021-11-16 | 中铁城建集团第一工程有限公司 | Foundation pit slope supporting structure |
| CN113653066B (en) * | 2021-08-23 | 2024-05-03 | 中铁城建集团第一工程有限公司 | Foundation pit side slope supporting structure |
| CN113818449A (en) * | 2021-10-13 | 2021-12-21 | 广东一新长城建筑集团有限公司 | Supporting structure for integrated prefabricated pump station well sinking and construction method applying supporting structure |
| CN114059549A (en) * | 2021-10-21 | 2022-02-18 | 温州职业技术学院 | Special foundation ditch protective structure of soft foundation building |
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Application publication date: 20201201 |
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