CN109339056B - Adjustable support structure in foundation pit assembly type steel support system and use method thereof - Google Patents
Adjustable support structure in foundation pit assembly type steel support system and use method thereof Download PDFInfo
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- CN109339056B CN109339056B CN201811390119.9A CN201811390119A CN109339056B CN 109339056 B CN109339056 B CN 109339056B CN 201811390119 A CN201811390119 A CN 201811390119A CN 109339056 B CN109339056 B CN 109339056B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 132
- 239000010959 steel Substances 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000008093 supporting effect Effects 0.000 claims abstract description 125
- 238000009435 building construction Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention belongs to the field of building construction, and relates to an adjustable support structure in a foundation pit assembled type steel support system and a use method thereof, wherein the adjustable support structure comprises a first steel support device, a second steel support device and a pressurizing device, the first steel support device is composed of a fixed plate and a first support plate which is orthogonally connected with the fixed plate, and the second steel support device is composed of the fixed plate and a second support plate which is orthogonally connected with the fixed plate; a first strip-shaped bolt fixing hole is formed in the first supporting plate along the direction perpendicular to the fixing plate, and a second strip-shaped bolt fixing hole is correspondingly formed in the second supporting plate; the first steel supporting device and the second steel supporting device are respectively fixed on oppositely arranged connecting beams; the pressurizing device is arranged in a space formed by assembling the first steel supporting device and the second steel supporting device between the connecting beams. The invention effectively solves the problem of stress loss of the conventional foundation pit assembled steel support axial prestress in the application process.
Description
Technical Field
The invention belongs to the field of building construction, relates to a foundation pit supporting device, and particularly relates to an adjustable supporting structure in a foundation pit assembled type steel supporting system and a use method thereof.
Background
With the development of foundation pit engineering construction technology, foundation pit supporting forms are continuously abundant, and a foundation pit assembled type steel supporting system is a supporting form capable of providing supporting effect immediately after installation, and has the advantages of light dead weight, high installation and dismantling speeds, low manufacturing cost, short construction period and high economic and social benefits.
When the foundation pit assembly type steel support system applies prestress to the support, the support system is compressed and deformed under the action of the hydraulic jack, the space of the pressurizing groove is increased, and the increase cannot be estimated accurately. In order to solve the problem, the conventional practice is to arrange 2-3 force-retaining boxes at the pressurizing groove, wherein the length of the force-retaining boxes is slightly smaller than the width of the pressurizing groove, so that the force-retaining boxes can be smoothly placed into the pressurizing groove, steel backing plates with different thicknesses are plugged at the side edges of the force-retaining boxes after pressurizing, but the thickness of the steel backing plates is difficult to ensure that gaps after pressurizing are just filled, after the hydraulic jack is relieved, prestress is lost to a certain extent, and the actual axial prestress is difficult to meet the design requirement.
Disclosure of Invention
The invention aims to provide an adjustable support structure in a foundation pit assembled steel support system, which solves the problem of stress loss of the conventional foundation pit assembled steel support in the process of applying axial prestress. The invention further aims to provide a use method of the adjustable support structure in the foundation pit assembled steel support system, and the problem of stress loss in the process of applying the axial prestress of the conventional foundation pit assembled steel support is effectively solved by the method.
In order to solve the technical problems, the invention adopts the following technical scheme: the adjustable support structure in the foundation pit assembly type steel support system comprises a first steel support device (1), a second steel support device (2) and a pressurizing device (10), wherein the first steel support device (1) is composed of a fixed plate (3) and a first support plate (4) which is orthogonally connected with the fixed plate (3), and the second steel support device (2) is composed of the fixed plate (3) and a second support plate (6) which is orthogonally connected with the fixed plate (3); the first support plates (4) are in one-to-one correspondence with the second support plates (6), first strip-shaped bolt fixing holes (7) are formed in the first support plates (4) along the direction perpendicular to the fixing plates (3), and second strip-shaped bolt fixing holes (71) are correspondingly formed in the second support plates (6); the first steel supporting device (1) and the second steel supporting device (2) are respectively fixed on oppositely arranged connecting beams (8); the pressurizing device (10) is arranged in a space formed by assembling the first steel supporting device (1) and the second steel supporting device (2) between the connecting beams (8).
Further, the first support plate (4) and the second support plate (6) have the same structure, and a first strip-shaped bolt fixing hole (7) formed in the first support plate (4) and a second strip-shaped bolt fixing hole (71) formed in the second support plate (6) can be overlapped.
Further, the number of the first support plates (4) and the number of the second support plates (6) are the same, and a plurality of the first support plates (4) and the second support plates (6) are arranged according to the pre-stress to be applied.
Further, the first supporting plate (4) and the second supporting plate (6) are fixed together by using friction type high-strength bolts (9).
Further, the number of the friction type high-strength bolts (9) is 1 or more.
Further, the pressurizing device (10) is arranged in any space formed by assembling the first steel supporting device (1) and the second steel supporting device (2) between the connecting beams (8).
Further, bolt fixing holes (5) are formed in the fixing plate (3), and the first steel supporting device (1) and the second steel supporting device (2) are respectively fixed on the connecting beams (8) which are oppositely arranged through bolts.
On the other hand, the invention also provides a use method of the adjustable support structure in the foundation pit assembled type steel support system, which comprises the following steps: step 1: the first steel supporting device (1) and the second steel supporting device (2) are fixed on oppositely arranged connecting beams (8) through fixing plates (3), one side of the first steel supporting device (1) provided with a first supporting plate (4) and one side of the second steel supporting device (2) provided with a second supporting plate (6) are opposite, the first supporting plate (4) corresponds to the second supporting plate (6) one by one, and a first strip-shaped bolt fixing hole (7) in the first supporting plate (4) coincides with a second strip-shaped bolt fixing hole (71) in the second supporting plate (6); step 2: a pressurizing device (10) is placed in a space formed by assembling the first steel supporting device (1) and the second steel supporting device (2) between the connecting beams (8), and the pressurizing device (10) is started to pressurize the fixed plate (3), so that prestress is applied to the foundation pit assembled type steel supporting system; step 3: after the pressure is applied to the design stress, the friction type high-strength bolt (9) is penetrated into a first strip-shaped bolt fixing hole (7) on the first supporting plate (4) and a second strip-shaped bolt fixing hole (71) on the second supporting plate (6), the friction type high-strength bolt (9) is screwed and fixed, and the pressurizing device (10) is disassembled.
Further, the pressurizing device (10) in the step 2 is arranged in any space formed by assembling the first steel supporting device (1) and the second steel supporting device (2) between the connecting beams (8).
Further, in the step 3, 1 or more friction type high-strength bolts (9) are arranged in each of the first elongated bolt fixing hole (7) and the second elongated bolt fixing hole (71).
Working principle: according to the adjustable supporting structure, the first steel supporting device and the second steel supporting device are fixed between two opposite connecting beams, the first supporting plate and the second supporting plate are overlapped, and a first strip-shaped bolt fixing hole formed in the first supporting plate is overlapped with a second strip-shaped bolt fixing hole formed in the second supporting plate; starting a pressurizing device to pressurize the connecting beam so as to apply prestress to the foundation pit assembled type steel supporting system, enabling the connecting beam to displace under the action of the prestress, and simultaneously driving the first steel supporting device and the second steel supporting device to be separated relatively, wherein at the moment, the first supporting plate, the second supporting plate and a first strip-shaped bolt fixing hole formed in the first supporting plate are separated relatively from a second strip-shaped bolt fixing hole formed in the second supporting plate; after the pressurization is carried out to the design stress, the friction type high-strength bolt is simultaneously penetrated into the first strip-shaped bolt fixing hole in the first supporting plate and the first strip-shaped bolt fixing hole in the second supporting plate, the friction type high-strength bolt is screwed down and fixed, the pressurizing device is dismantled, the axial prestress is basically free from loss, the accuracy of the prestress application is ensured, and the foundation pit deformation is more controllable.
According to the applied prestress, a plurality of first supporting plates and second supporting plates can be arranged at the same time, so that the stress area of the adjustable supporting structure is increased, the prestress is decomposed, and the stress of the connecting beam is uniform.
In order to ensure that the friction-reinforcing high-strength bolt meets the stress requirement, a plurality of friction-type high-strength bolts can be arranged in each of the corresponding first strip-shaped bolt fixing holes and the second strip-shaped bolt fixing holes, so that the fastening effect of the friction-reinforcing high-strength bolt is ensured.
The adjustable supporting structure is arranged by adopting a frame structure, and any space formed by assembling the first steel supporting device and the second steel supporting device between the connecting beams can be provided with the pressurizing device for pressurizing simultaneously, so that the pressurizing efficiency is improved, the dispersed pressurizing is performed simultaneously, the prestressing force is applied simultaneously from a plurality of parts, and the uniform application of the prestressing force is ensured.
Compared with the prior art, the invention has the beneficial effects that: (1) The utility model provides an adjustable bearing structure in foundation ditch assembled shaped steel supporting system of simple structure, simple to operate, this adjustable bearing structure adopts frame construction to set up, and the arbitrary space that first steel strutting arrangement and second steel strutting arrangement assembled between the tie-beam formed can all set up pressure device and carry out pressurization simultaneously, utilizes the high-strength bolt fastening of reinforcing friction formula under the effect of pressure first backup pad and the second backup pad of relative separation, and axial prestressing force is lossless basically, has guaranteed the accuracy that prestressing force was applyed, and foundation ditch deformation is more controllable. (2) The adjustable support structure in the foundation pit assembly type steel support system adopts a steel structure, and the components in the adjustable support structure can be detached and recombined and can be repeatedly used. (3) After the pressure is applied to the design stress, the fastening between the first steel supporting device and the second steel supporting device can be performed, the relative fixation of the first steel supporting device and the second steel supporting device is ensured, the pressurizing device is removed to enter the next working procedure, waiting time is not needed between the two working procedures, the setting of the foundation pit assembly type steel supporting system is greatly improved, and the construction period is shortened.
Drawings
Fig. 1 is a schematic view of a first steel support device and a second steel support device according to the present invention.
Fig. 2 is a schematic view of a first steel support device and a second steel support device according to the present invention.
FIG. 3 is a schematic view showing the first steel support device and the second steel support device of the present invention after being assembled.
Fig. 4 is a view showing a state of use of the adjustable support structure in the foundation pit assembly type section steel support system of the present invention.
Marked in the figure as: 1-a first steel support device; 2-a second steel support device; 3-fixing plates; 4-a first support plate; 5-bolt fixing holes; 6-a second support plate; 7-a first elongated bolt fixing hole; 71-a second elongated bolt securing hole; 8-connecting beams; 9-friction type high-strength bolts; 10-pressurizing device.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1 and 2, the adjustable support structure in the foundation pit assembly type steel support system of the invention comprises a first steel support device 1, a second steel support device 2 and a pressurizing device 10. Wherein the first steel supporting device 1 and the second steel supporting device 2 are identical in structure and symmetrically arranged. The first steel supporting device 1 comprises a fixed plate 3 and a first supporting plate 4, wherein the fixed plate 3 is a plane plate, and the first supporting plate 4 is orthogonally connected to the fixed plate 3; correspondingly, the second steel supporting means 2 comprises a fixing plate 3 and a second supporting plate 6, the fixing plate 3 is a plane plate, and the second supporting plate 6 is orthogonally connected to the fixing plate 3. The number of the first support plates 4 and the second support plates 6 is the same, and the first support plates 4 and the second support plates 6 are arranged on the fixed plate 3 at equal intervals according to the prestress to be applied.
The first support plate 4 and the second support plate 6 have the same structure, the first support plate 4 is provided with a first elongated bolt fixing hole 7 along the direction perpendicular to the fixing plate 3, and correspondingly, the second support plate 6 is provided with a second elongated bolt fixing hole 71 along the direction perpendicular to the fixing plate 3.
The first elongated bolt fixing hole 7 and the second elongated bolt fixing hole 71 may coincide, and in an initial state where the first steel supporting means 1 and the second steel supporting means 2 are joined together, the first elongated bolt fixing hole 7 and the second elongated bolt fixing hole 71 are completely coincident. In a state where the first steel supporting means 1 and the second steel supporting means 2 are relatively separated, the first elongated bolt fixing hole 7 and the second elongated bolt fixing hole 71 are also separated accordingly. In a state where the separation of the first steel supporting means 1 and the second steel supporting means 2 is completed, the separated state between the first elongated bolt fixing hole 7 and the second elongated bolt fixing hole 71 is to be fixed.
The fixing plate 3 is provided with bolt fixing holes 5, the first steel supporting device 1 and the second steel supporting device 2 are fixed on the connecting beams 8 which are oppositely arranged through the bolts and the bolt fixing holes 5, one side of the first steel supporting device 1 provided with the first supporting plate 4 and one side of the second steel supporting device 2 provided with the second supporting plate 6 are opposite, the first supporting plate 4 corresponds to the second supporting plate 6 one by one, and the first strip-shaped bolt fixing holes 7 on the first supporting plate 4 coincide with the second strip-shaped bolt fixing holes 71 on the second supporting plate 6. At this time, a certain space is formed between the first steel supporting device 1 and the second steel supporting device 2 between the connecting beams 8, and the pressurizing device 10 is placed in the space to support the connecting beams 8 which are oppositely arranged.
Example 2
In order to ensure that the first strip-shaped bolt fixing hole 7 and the second strip-shaped bolt fixing hole 71 do not slide in the use process of the adjustable supporting structure in the foundation pit assembly type steel supporting system, the fastening and the relative fixing of the first steel supporting device and the second steel supporting device are ensured, and the corresponding first supporting plate 4 and the second supporting plate 6 are usually fixed together by using friction type high-strength bolts 9.
Further, the number of the friction type high strength bolts 9 may be plural according to the design pressure,
example 3
When the adjustable support structure in the foundation pit assembled type steel support system is used, the first steel support device 1, the second steel support device 2 and the pressurizing device 10 are assembled, and the pressurizing device 10 is started to pressurize the fixed plate 3, so that prestress is applied to the foundation pit assembled type steel support system. After the pressure is applied to the design stress, the friction type high strength bolt 9 is penetrated into the first strip bolt fixing hole 7 on the first support plate 4 and the second strip bolt fixing hole 71 on the second support plate 6, the friction type high strength bolt 9 is screwed and fixed, and the first support plate 4 and the second support plate 6 are fixed together by virtue of the action of the friction type high strength bolt 9, so that the first steel support device 1 and the second steel support device 2 form a whole. At this time, the pressurizing device 10 is removed, and the axial prestress of the foundation pit assembly type steel support system is not basically lost because the whole between the first steel support device 1 and the second steel support device 2 does not displace.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure. More specifically, various variations and modifications may be made to the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, drawings and claims of this application. In addition to variations and modifications in the component parts and/or arrangements, other uses will be apparent to those skilled in the art.
Claims (8)
1. The adjustable support structure in the foundation pit assembly type steel support system is characterized by comprising a first steel support device (1), a second steel support device (2) and a pressurizing device (10), wherein the first steel support device (1) is composed of a fixed plate (3) and a first support plate (4) which is orthogonally connected with the fixed plate (3), and the second steel support device (2) is composed of the fixed plate (3) and a second support plate (6) which is orthogonally connected with the fixed plate (3); the first support plates (4) are in one-to-one correspondence with the second support plates (6), first strip-shaped bolt fixing holes (7) are formed in the first support plates (4) along the direction perpendicular to the fixing plates (3), and second strip-shaped bolt fixing holes (71) are correspondingly formed in the second support plates (6); the first steel supporting device (1) and the second steel supporting device (2) are respectively fixed on oppositely arranged connecting beams (8); the pressurizing device (10) is arranged in a space formed by assembling the first steel supporting device (1) and the second steel supporting device (2) between the connecting beams (8); wherein:
the pressurizing device (10) is arranged in any space formed by assembling the first steel supporting device (1) and the second steel supporting device (2) between the connecting beams (8);
the first support plate (4) and the second support plate (6) have the same structure, and a first strip-shaped bolt fixing hole (7) formed in the first support plate (4) can be overlapped with a second strip-shaped bolt fixing hole (71) formed in the second support plate (6);
the first steel supporting device (1) and the second steel supporting device (2) have the same structure and are symmetrically arranged;
the first supporting plate (4) and the second supporting plate (6) are arranged on the fixed plate (3) at equal intervals, and the fixed plate (3) is a plane plate.
2. The adjustable support structure in a foundation pit assembled section steel support system according to claim 1, wherein the number of the first support plates (4) and the second support plates (6) is the same, and a plurality of the first support plates (4) and the second support plates (6) are arranged according to the pre-stress to be applied.
3. The adjustable support structure in the foundation pit assembly type steel support system according to claim 1, wherein the first support plate (4) and the second support plate (6) are fixed together by using friction type high-strength bolts (9).
4. An adjustable support structure in a pit-assembled steel support system according to claim 3, wherein the number of friction-type high-strength bolts (9) is 1 or more.
5. The adjustable support structure in the foundation pit assembly type steel support system according to claim 1, wherein the fixing plate (3) is provided with bolt fixing holes (5), and the first steel support device (1) and the second steel support device (2) are respectively fixed on the oppositely arranged connecting beams (8) through bolts.
6. The method of using an adjustable support structure in a pit-assembled section steel support system according to any one of claims 1-5, comprising the steps of:
step 1: the first steel supporting device (1) and the second steel supporting device (2) are fixed on oppositely arranged connecting beams (8) through fixing plates (3), one side of the first steel supporting device (1) provided with a first supporting plate (4) and one side of the second steel supporting device (2) provided with a second supporting plate (6) are opposite, the first supporting plate (4) corresponds to the second supporting plate (6) one by one, and a first strip-shaped bolt fixing hole (7) in the first supporting plate (4) coincides with a second strip-shaped bolt fixing hole (71) in the second supporting plate (6);
step 2: a pressurizing device (10) is placed in a space formed by assembling the first steel supporting device (1) and the second steel supporting device (2) between the connecting beams (8), and the pressurizing device (10) is started to pressurize the fixed plate (3), so that prestress is applied to the foundation pit assembled type steel supporting system;
step 3: after the pressure is applied to the design stress, the friction type high-strength bolt (9) is penetrated into a first strip-shaped bolt fixing hole (7) on the first supporting plate (4) and a second strip-shaped bolt fixing hole (71) on the second supporting plate (6), the friction type high-strength bolt (9) is screwed and fixed, and the pressurizing device (10) is disassembled.
7. The method for using the adjustable support structure in the foundation pit assembled type steel support system according to claim 6, wherein the pressurizing device (10) in the step 2 is arranged in any space formed by assembling the first steel support device (1) and the second steel support device (2) between the connecting beams (8).
8. The method for using the adjustable support structure in the foundation pit assembled type steel support system according to claim 6, wherein 1 or more friction type high strength bolts (9) are arranged in each of the first elongated bolt fixing hole (7) and the second elongated bolt fixing hole (71) in the step 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811390119.9A CN109339056B (en) | 2018-11-21 | 2018-11-21 | Adjustable support structure in foundation pit assembly type steel support system and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811390119.9A CN109339056B (en) | 2018-11-21 | 2018-11-21 | Adjustable support structure in foundation pit assembly type steel support system and use method thereof |
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| Publication Number | Publication Date |
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| CN109339056A CN109339056A (en) | 2019-02-15 |
| CN109339056B true CN109339056B (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811390119.9A Active CN109339056B (en) | 2018-11-21 | 2018-11-21 | Adjustable support structure in foundation pit assembly type steel support system and use method thereof |
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Families Citing this family (1)
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| CN113445512A (en) * | 2021-03-25 | 2021-09-28 | 深圳市深安企业有限公司 | Assembled adjustable supporting structure for foundation pit and debugging method |
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| US5459967A (en) * | 1994-02-10 | 1995-10-24 | Bodtker; Carl E. | Adjustable support structure |
| KR200277698Y1 (en) * | 2002-03-09 | 2002-06-07 | (주)신성엔지니어링 | soldier beam installed according to axial force in excavating work |
| JP2004124670A (en) * | 2002-10-02 | 2004-04-22 | Nippon Supiide Shiyoa Kk | Preloading panel type earth retaining |
| KR20120140318A (en) * | 2011-06-21 | 2012-12-31 | 서상건 | Variable stiffner jack for h-beam |
| CN204333788U (en) * | 2014-12-25 | 2015-05-13 | 江苏大津重工有限公司 | A kind of cable tube cable laying electrical hoist device |
| CN104929134A (en) * | 2015-06-15 | 2015-09-23 | 北京工业大学 | Tapered wedge type adjustable device for foundation pit engineering inner support and construction method |
| CN106284367A (en) * | 2015-05-29 | 2017-01-04 | 上海城地建设股份有限公司 | A kind of foundation pit supporting construction using scalable prestress steel to support |
| CN108824443A (en) * | 2018-06-28 | 2018-11-16 | 云南建投基础工程有限责任公司 | Precisely adjust the device and its loading method of foundation pit steel support brace pre axial force |
| CN209293033U (en) * | 2018-11-21 | 2019-08-23 | 云南建投基础工程有限责任公司 | Adjustable supports structure in a kind of foundation pit assembled type steel support system |
-
2018
- 2018-11-21 CN CN201811390119.9A patent/CN109339056B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5459967A (en) * | 1994-02-10 | 1995-10-24 | Bodtker; Carl E. | Adjustable support structure |
| KR200277698Y1 (en) * | 2002-03-09 | 2002-06-07 | (주)신성엔지니어링 | soldier beam installed according to axial force in excavating work |
| JP2004124670A (en) * | 2002-10-02 | 2004-04-22 | Nippon Supiide Shiyoa Kk | Preloading panel type earth retaining |
| KR20120140318A (en) * | 2011-06-21 | 2012-12-31 | 서상건 | Variable stiffner jack for h-beam |
| CN204333788U (en) * | 2014-12-25 | 2015-05-13 | 江苏大津重工有限公司 | A kind of cable tube cable laying electrical hoist device |
| CN106284367A (en) * | 2015-05-29 | 2017-01-04 | 上海城地建设股份有限公司 | A kind of foundation pit supporting construction using scalable prestress steel to support |
| CN104929134A (en) * | 2015-06-15 | 2015-09-23 | 北京工业大学 | Tapered wedge type adjustable device for foundation pit engineering inner support and construction method |
| CN108824443A (en) * | 2018-06-28 | 2018-11-16 | 云南建投基础工程有限责任公司 | Precisely adjust the device and its loading method of foundation pit steel support brace pre axial force |
| CN209293033U (en) * | 2018-11-21 | 2019-08-23 | 云南建投基础工程有限责任公司 | Adjustable supports structure in a kind of foundation pit assembled type steel support system |
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| CN109339056A (en) | 2019-02-15 |
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