CN111042579A - Quick back jacking device and method for load-bearing structure - Google Patents
Quick back jacking device and method for load-bearing structure Download PDFInfo
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- CN111042579A CN111042579A CN202010001476.2A CN202010001476A CN111042579A CN 111042579 A CN111042579 A CN 111042579A CN 202010001476 A CN202010001476 A CN 202010001476A CN 111042579 A CN111042579 A CN 111042579A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
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Abstract
The invention discloses a quick back-jacking device and a quick back-jacking method for a load-bearing structure, wherein the device comprises an upper top plate (1), a back-jacking cylinder (2), jacking lug plates (3), lower supporting plates (4), a jack (5) and a lengthening sleeve (6); the back-propping column body (2) and the length-compensating sleeve (6) form a back-propping supporting system and are arranged between the floor slab and the foundation through the upper top plate (1) and the lower supporting plate (4). The device can transmit the load of the top structure to the foundation, ensures the safe construction of the top structure, and has the advantages of small occupied space, strong loading capacity, high safety and stability. The method can quickly assemble the back-jacking supporting system between the floor slab and the foundation, has simple construction method and convenient disassembly and assembly, reduces the workload of back-jacking operation, and does not interfere other construction procedures.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a quick back-jacking device and method for a load-bearing structure.
Background
In the current environment of the construction industry, construction sites are required to have higher timeliness, safety and reliability in the construction process. Especially, in the steel structure construction process of large-scale building engineering such as a comprehensive stadium, loads such as a steel structure net rack or a supporting jig frame are supported on a concrete beam or a floor slab, and the bearing capacity of the floor slab or the beam cannot meet the bearing capacity requirement.
Chinese utility model patent ZL201721450935.5 discloses a back supporting structure of basement, last stay tube and bottom suspension fagging including vertical setting, it is located the bottom suspension fagging top to go up the stay tube, goes up the vertical sliding connection of stay tube and bottom suspension fagging, and the bottom suspension fagging upper end is rotated and is connected with the rotation cover, rotates cover and last stay tube threaded connection, is equipped with the lower sliding tray rather than parallel in the bottom suspension fagging, goes up the stay tube lower extreme and is equipped with the slide bar rather than parallel, slide bar lower extreme fixedly connected with and lower sliding tray sliding connection's lower slider. The back-jacking supporting structure has lower supporting strength and is not suitable for load supporting of steel structures in large-scale constructional engineering.
The Chinese patent application CN201811384537.7 discloses a back-jacking reinforcing structure for a post-cast strip cantilever and a construction method thereof, the back-jacking reinforcing structure comprises a PVC pipe, concrete, battens and a rotating sleeve, the concrete is poured in the PVC pipe, the upper end and the lower end of the PVC pipe are fixed through the battens, the rotating sleeve is sleeved in the middle of the outer wall of the PVC pipe, a connector is welded in the middle of the side wall of the rotating sleeve, a clamping groove for butt-joint fixing with a steel pipe is formed in the side wall of the connector, a power supply is embedded in the outer wall of the connector, and clamping sleeves are mounted on the inner walls of the upper side. The back-jacking reinforcing structure and the construction method thereof are used for back-jacking support of the cantilever end of the beam plate in the post-cast strip area, the support strength is not high, the application range is narrow, the operation process is complex, the occupied space is large, and the construction period is influenced.
Disclosure of Invention
One of the purposes of the invention is to provide a quick back jacking device for a load-bearing structure, which can transfer the load of the top structure to a foundation, ensure the safe construction of the top structure, and has the advantages of small occupied space, strong load capacity, high safety and high stability.
The invention also aims to provide a quick back-jacking method for a load-bearing structure, which can quickly assemble a back-jacking supporting system between a floor slab and a foundation, has simple construction method and convenient disassembly and assembly, reduces the workload of back-jacking operation, and does not interfere other construction procedures.
The invention is realized by the following steps:
a quick back-jacking device for a load-bearing structure comprises an upper top plate, a back-jacking cylinder, jacking ear plates, a lower supporting plate, a jack and a lengthening sleeve; the top of the back-jacking cylinder is fixedly connected with an upper top plate, the upper top plate is of a planar plate-shaped structure and is fixedly attached to a concrete floor through a bolt, and the back-jacking cylinder is vertically supported below the concrete floor; the pair of jacking ear plates are symmetrically arranged on the outer wall of the back jacking cylinder, the pair of jacking ear plates are positioned on two sides of the lower part of the back jacking cylinder, and the pair of jacks can be tightly supported between the foundation floor slab and the pair of jacking ear plates; the upper part of the lengthening sleeve is coaxially sleeved at the bottom of the back-jacking cylinder, the lower end of the lengthening sleeve is fixedly connected with a lower supporting plate of the planar plate-shaped structure, the lower supporting plate is fixedly attached to a foundation floor slab through bolts, and the lengthening sleeve and the back-jacking cylinder are connected to form an integrated back-jacking supporting system and are tightly jacked between the concrete floor slab and the foundation floor slab.
A plurality of first stiffening plates are connected between the upper top plate and the back-jacking cylinder at intervals, and are circumferentially arranged at the top of the outer wall of the back-jacking cylinder in a surrounding manner.
The lengthening sleeve comprises a pair of unit sleeves with semicircular cross sections, and the pair of unit sleeves are butted to form the lengthening sleeve with the inner diameter equivalent to the outer diameter of the back-jacking cylinder, so that the lengthening sleeve is sleeved outside the back-jacking cylinder and can coaxially and relatively move.
And a plurality of second stiffening plates are connected between the lengthening sleeve and the lower supporting plate at intervals, and are circumferentially arranged at the bottom of the outer wall of the lengthening sleeve in a surrounding manner.
The height of the back-jacking cylinder is smaller than the distance between the concrete floor slab and the foundation floor slab, and the height of the lengthening sleeve is larger than the distance between the lower end of the back-jacking cylinder and the foundation floor slab.
The height of the back-jacking column is smaller than the distance between the concrete floor slab and the foundation floor slab by 100-200 mm.
The height of the lengthening sleeve is 300 mm.
The lengthening sleeve is positioned below the jacking lug plate.
A method for quick roof return for a load bearing structure comprising the steps of:
step 1: fixedly connecting the upper end of the back-propping column body with the upper top plate;
step 2: fixing the upper top plate on the concrete floor slab through bolts;
and step 3: symmetrically arranging a pair of jacks on two sides of the back jacking column body, and respectively jacking the jacks between a pair of jacking lug plates and a foundation floor slab;
and 4, step 4: sleeving a pair of unit sleeves of the length-supplementing sleeve on the lower part of the back-jacking cylinder and splicing the unit sleeves into an integrated length-supplementing sleeve;
and 5: fixing the lower supporting plate on the foundation floor slab through bolts;
step 6: the lower end of the length-complementing sleeve is tightly propped against the lower supporting plate, and the length-complementing sleeve is fixedly connected with the back-propping column body;
and 7: and (4) dismantling the pair of jacks, and transmitting the top load of the concrete floor slab to the foundation floor slab by a back jacking support system consisting of the lengthening sleeve and the back jacking column.
In the step 6, after the extension sleeve is connected and fixed with the back-jacking cylinder, a plurality of second stiffening plates are arranged between the extension sleeve and the lower supporting plate, and a plurality of first stiffening plates are arranged between the back-jacking cylinder and the upper top plate.
Compared with the prior art, the invention has the following beneficial effects:
1. the device has the advantages of simple manufacture, convenient and fast assembly, small volume, reduction of the occupation of the structural space, quick roof return of the concrete structural beam and the concrete structural slab, transmission of the load on the floor slab structure to the foundation, and high safety and stability.
2. The device can be widely applied to various building construction scenes, is not influenced by environmental conditions, can bear working conditions such as steel structure bed-jig, large-scale construction machinery load, heavy load and the like at the upper part of a concrete structure, and reduces the influence on other working procedures to the maximum extent.
3. The device can adjust the height of the back-jacking support system according to the height of the floor, has strong applicability and can quickly finish the assembly of the back-jacking of the floor.
4. The method of the invention has simple operation, greatly improves the working efficiency of back jacking compared with the conventional back jacking mode, and can finish back jacking work more quickly and efficiently, thereby protecting the concrete structure bearing load and accelerating the construction progress of other procedures of the above-ground structure.
Drawings
FIG. 1 is a construction drawing of the quick back jack apparatus for a load bearing structure of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a cross-sectional view C-C of FIG. 1;
FIG. 5 is a sectional view of the installation of the extension sleeve and jack in the quick jacking system for a load-bearing structure of the present invention;
FIG. 6 is an exploded view of the unit sleeve of the quick jacking device for a load bearing structure of the present invention;
figure 7 is a flow chart of the method of the invention for quick roof return of a load bearing structure.
In the figure, 1 an upper top plate, 2 a back-jacking cylinder, 3 jacking ear plates, 4 lower supporting plates, 5 jacks, 6 lengthening sleeves, 61 welding seams, 7 concrete floors, 8 bolts, 9 foundation floors, 10 first stiffening plates, 11 second stiffening plates and 12 structures.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to the attached figure 1, the quick back-jacking device for the load-bearing structure comprises an upper top plate 1, a back-jacking cylinder 2, jacking lug plates 3, a lower supporting plate 4, a jack 5 and a lengthening sleeve 6; referring to fig. 2, the top of the back-propping cylinder 2 is fixedly connected with the upper top plate 1, the upper top plate 1 is a planar plate-shaped structure and is fixedly attached to a concrete floor 7 through bolts 8, and the back-propping cylinder 2 is vertically supported below the concrete floor 7; referring to fig. 3, a pair of jacking ear plates 3 are symmetrically arranged on the outer wall of the back-jacking column body 2, the pair of jacking ear plates 3 are positioned at two sides of the lower part of the back-jacking column body 2, and a pair of jacks 5 can be tightly supported between a foundation floor 9 and the pair of jacking ear plates 3; referring to fig. 4 and 5, the upper part of the lengthening sleeve 6 is coaxially sleeved at the bottom of the back-jacking cylinder 2, the lower end of the lengthening sleeve 6 is fixedly connected with the lower supporting plate 4 of the planar plate-shaped structure, the lower supporting plate 4 is fixedly attached to the foundation floor 9 through the bolt 8, and the lengthening sleeve 6 and the back-jacking cylinder 2 are connected to form an integral back-jacking supporting system and are tightly jacked between the concrete floor 7 and the foundation floor 9.
A plurality of first stiffening plates 10 are connected between the upper top plate 1 and the back-jacking cylinder 2 at intervals, and the first stiffening plates 10 are circumferentially arranged at the top of the outer wall of the back-jacking cylinder 2 in a surrounding manner, so that the load capacity of the upper top plate 1 for supporting back jacking can be improved.
Referring to fig. 6, the lengthening sleeve 6 includes a pair of unit sleeves with semicircular cross sections, the pair of unit sleeves are butted to form the lengthening sleeve 6 with an inner diameter corresponding to the outer diameter of the back-up column 2, so that the lengthening sleeve 6 is sleeved outside the back-up column 2 and can move coaxially and relatively, the height of the lengthening sleeve 6 can be adjusted, and the lengthening sleeve 6 is tightly pressed between the lower supporting plate 4 and the back-up column 2. A pair of unit sleeves can be fixed by welding, and the welding seams 61 of the unit sleeves are as long as the length of the extension sleeve 6.
And a plurality of second stiffening plates 11 are connected between the extension sleeve 6 and the lower supporting plate 4 at intervals, and the second stiffening plates 11 are circumferentially arranged at the bottom of the outer wall of the extension sleeve 6 in a surrounding manner, so that the load capacity of the extension sleeve 6 for supporting the back top can be improved.
The back-jacking cylinder 2 is less than the distance between the concrete floor 7 and the foundation floor 9 (namely the height of the floor), so that the back-jacking main body 2, the lengthening sleeve 6 and the jack 5 can be quickly assembled, the lengthening sleeve 6 is more than the distance between the lower end of the back-jacking cylinder 2 and the foundation floor 9, and the back-jacking cylinder 7 and the foundation floor 9 can be effectively supported to have a back-jacking effect after the lengthening sleeve 6 and the back-jacking cylinder 2 are connected.
Preferably, the height of the back prop 2 is smaller than the distance between the concrete floor 7 and the foundation floor 9 by 100-200mm, and a gap is reserved between the back prop 2 and the foundation floor 9 to facilitate the erection of the back prop 2 and the jack 5.
Preferably, the height of the extension sleeve 6 is 300mm, so that a sufficient connection length between the extension sleeve 6 and the back prop body 2 is ensured, and the connection reliability is ensured.
The lengthening sleeve 6 is located below the jacking ear plate 3, and mutual interference between the unit sleeve and the jacking ear plate 3 and the jack 5 during installation is prevented.
Referring to figure 7 of the drawings, a method for quick roof return of a load bearing structure comprises the steps of:
step 1: the upper end of the back-propping column body 2 is fixedly connected with the upper top plate 1, and the fixed connection can be realized by adopting welding and other modes.
Step 2: the upper top plate 1 is fixed to the concrete floor 7 by bolts 8.
And step 3: a pair of jacks 5 are symmetrically arranged at two sides of the back jacking column body 2 and are respectively tightly propped between the pair of jacking ear plates 3 and the foundation floor slab 9.
And 4, step 4: and a pair of unit sleeves of the length-compensating sleeve 6 is sleeved on the lower part of the back-propping column body 2 and spliced into the integral length-compensating sleeve 6, and the length-compensating sleeve 6 can be spliced by adopting modes such as welding and the like.
And 5: the lower supporting plate 4 is fixed on the foundation floor 9 through bolts 8.
Step 6: the lower end of the lengthening sleeve 6 is tightly propped against the lower supporting plate 4, and the lengthening sleeve 6 is fixedly connected with the back-propping cylinder 2 and can be fixed by welding and the like.
In the step 6, after the reinforcing sleeve 6 is connected and fixed with the back-jacking cylinder 2, a plurality of second stiffening plates 11 are arranged between the reinforcing sleeve 6 and the lower supporting plate 4, a plurality of first stiffening plates 10 are arranged between the back-jacking cylinder 2 and the upper top plate 1, and a back-jacking supporting system formed by the back-jacking cylinder 2 and the reinforcing sleeve 6 is reinforced, so that the load capacity of the back-jacking supporting system is improved.
And 7: and (3) removing the pair of jacks 5, and transferring the top load of the concrete floor slab 7 to the foundation floor slab 9 by a back-jacking support system consisting of the lengthening sleeve 6 and the back-jacking column body 2.
Example (b):
the upper top plate 1 is made of 600 × 20mm rectangular steel plates, and the upper top plate 1 is fixed with the concrete floor slab 7 through four M16 expansion bolts; the back-up column body 2 can be made of a hot-rolled seamless steel pipe with the outer diameter of 245mm and the thickness of 14mm, and the upper end of the back-up column body 2 is welded and fixed with the upper top plate 1 and is used for bearing the load of the structure 12 on the concrete floor 7.
The height of the back prop column 2 is 100mm less than the height of the floor, namely after the top of the back prop column 2 is fixed, the distance between the bottom of the back prop column 2 and the foundation floor 9 is 100mm, which is convenient for the arrangement of the back prop column 2 and the jack 5; a pair of jacks 5 are supported between the pair of jacking lug plates 3 and the foundation floor slab 9 in a jacking manner, and the jacks 5 can adopt mechanical jacking devices, hydraulic jacking devices and the like in the prior art so as to meet the requirement of temporary supporting load; the interval between jacking otic placode 3 and the basic floor 9 is 500mm, and the free end height of jacking otic placode 3 is 50mm, the link height is 100mm, length is 200mm, the width is 80mm, ensures that jack 5 and back-up cylinder 2 can play effectual support to structure 12 on the concrete floor 7.
The lower supporting plate 4 is made of rectangular steel plates with the thickness of 450 mm and 20mm, and the lower supporting plate 4 is fixed with the foundation floor slab 9 through four M16 expansion bolts; the pair of unit sleeves are sleeved at the lower part of the back-jacking cylinder 2, tightly hold the back-jacking cylinder 2 and are welded into an integral-structure lengthening sleeve 6 with the inner diameter of 245mm and the height of 300 mm; under the condition of guaranteeing the tight on-site jacking of the back-jacking cylinder 2, the lower end of the lengthening sleeve 6 is fixedly welded on the lower supporting plate 4, the upper end of the lengthening sleeve 6 is fixedly welded on the back-jacking cylinder 2, and the lengthening sleeve 6 and the back-jacking cylinder 2 form a back-jacking supporting system and can play a role in back-jacking and supporting a structure 12 on a concrete floor 7.
A first stiffening plate 10 is welded between the back-propping cylinder 2 and the upper top plate 1 at an interval of 45 degrees, at least one polygonal steel plate with right angles can be adopted as the first stiffening plate 10, the height of the first stiffening plate 10 is 200mm, the width is 175mm or 200mm, and the thickness is 16 mm. And a second stiffening plate 11 is welded between the extension sleeve 6 and the lower supporting plate 4 at an interval of 45 degrees, at least one polygonal steel plate with right angles can be adopted as the second stiffening plate 11, the height of the second stiffening plate 11 is 150mm, the width is 75mm or 140mm, and the thickness is 16 mm.
After the installation is completed, the jack 5 is dismantled, the lengthening sleeve 6 and the back-jacking cylinder 2 participate in structural stress, the top load of the concrete floor slab 7 is transmitted to the foundation floor slab 9, the continuous construction of the structures 12 such as the upper steel structure support frame can be ensured, and the structural safety is ensured.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A quick back-jacking device for a load-bearing structure is characterized in that: comprises an upper top plate (1), a back-jacking column body (2), a jacking ear plate (3), a lower supporting plate (4), a jack (5) and a lengthening sleeve (6); the top of the back-jacking cylinder (2) is fixedly connected with the upper top plate (1), the upper top plate (1) is of a plane plate-shaped structure and is fixedly attached to a concrete floor (7) through a bolt (8), and the back-jacking cylinder (2) is vertically supported below the concrete floor (7); the pair of jacking ear plates (3) are symmetrically arranged on the outer wall of the back jacking cylinder (2), the pair of jacking ear plates (3) are positioned at two sides of the lower part of the back jacking cylinder (2), and the pair of jacks (5) can be tightly supported between the foundation floor (9) and the pair of jacking ear plates (3); the upper part of the lengthening sleeve (6) is coaxially sleeved at the bottom of the back-jacking cylinder (2), the lower end of the lengthening sleeve (6) is fixedly connected with a lower supporting plate (4) of the planar plate-shaped structure, the lower supporting plate (4) is fixed on a foundation floor (9) through a bolt (8) in a fitting manner, and the lengthening sleeve (6) is connected with the back-jacking cylinder (2) to form an integral back-jacking supporting system and tightly jacked between a concrete floor (7) and the foundation floor (9).
2. A quick-return device for load-bearing structures, as claimed in claim 1, characterized in that: a plurality of first stiffening plates (10) are connected between the upper top plate (1) and the back-jacking cylinder (2) at intervals, and the first stiffening plates (10) are circumferentially arranged at the top of the outer wall of the back-jacking cylinder (2).
3. A quick-return device for load-bearing structures, as claimed in claim 1, characterized in that: the lengthening sleeve (6) comprises a pair of unit sleeves with semicircular cross sections, the pair of unit sleeves are butted to form the lengthening sleeve (6) with the inner diameter equivalent to the outer diameter of the back-jacking cylinder (2), and the lengthening sleeve (6) is sleeved outside the back-jacking cylinder (2) and can coaxially move relatively.
4. A quick-return device for load-bearing structures, according to claim 1 or 3, characterized in that: a plurality of second stiffening plates (11) are connected between the extension sleeve (6) and the lower supporting plate (4) at intervals, and the second stiffening plates (11) are circumferentially arranged at the bottom of the outer wall of the extension sleeve (6) in a surrounding manner.
5. A quick-return device for load-bearing structures, according to claim 1 or 3, characterized in that: the height of the back-jacking cylinder (2) is smaller than the distance between the concrete floor (7) and the foundation floor (9), and the height of the lengthening sleeve (6) is larger than the distance between the lower end of the back-jacking cylinder (2) and the foundation floor (9).
6. A quick-return device for load-bearing structures, according to claim 5, characterized in that: the height of the back-propping column (2) is 100-200mm smaller than the distance between the concrete floor (7) and the foundation floor (9).
7. A quick-return device for load-bearing structures, according to claim 5, characterized in that: the height of the lengthening sleeve (6) is 300 mm.
8. A quick-return device for load-bearing structures, according to claim 1 or 3, characterized in that: the lengthening sleeve (6) is positioned below the jacking ear plate (3).
9. A method of using the quick-return device for load-bearing structures of claim 1, characterized in that: the method comprises the following steps:
step 1: fixedly connecting the upper end of the back-propping cylinder (2) with the upper top plate (1);
step 2: fixing the upper top plate (1) on a concrete floor (7) through a bolt (8);
and step 3: symmetrically arranging a pair of jacks (5) at two sides of the back jacking column body (2) and respectively jacking between a pair of jacking ear plates (3) and a foundation floor slab (9);
and 4, step 4: sleeving a pair of unit sleeves of the length-compensating sleeve (6) on the lower part of the back-jacking cylinder (2) and splicing the unit sleeves into an integrated length-compensating sleeve (6);
and 5: fixing a lower supporting plate (4) on a foundation floor (9) through a bolt (8);
step 6: the lower end of the lengthening sleeve (6) is tightly propped against the lower supporting plate (4), and the lengthening sleeve (6) is fixedly connected with the back-propping cylinder (2);
and 7: and (3) dismantling the pair of jacks (5), and transferring the top load of the concrete floor (7) to the foundation floor (9) by a back-jacking support system consisting of the lengthening sleeve (6) and the back-jacking column (2).
10. A method for quick-return of a load-bearing structure according to claim 9, characterized in that: in the step 6, after the extension sleeve (6) is connected and fixed with the back-pushing column body (2), a plurality of second stiffening plates (11) are arranged between the extension sleeve (6) and the lower supporting plate (4), and a plurality of first stiffening plates (10) are arranged between the back-pushing column body (2) and the upper top plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010001476.2A CN111042579A (en) | 2020-01-02 | 2020-01-02 | Quick back jacking device and method for load-bearing structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010001476.2A CN111042579A (en) | 2020-01-02 | 2020-01-02 | Quick back jacking device and method for load-bearing structure |
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| CN111042579A true CN111042579A (en) | 2020-04-21 |
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| CN202010001476.2A Pending CN111042579A (en) | 2020-01-02 | 2020-01-02 | Quick back jacking device and method for load-bearing structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677332A (en) * | 2020-05-27 | 2020-09-18 | 中建二局安装工程有限公司 | Adjustable-elevation simple back-jacking support and using method |
| CN112065472A (en) * | 2020-08-06 | 2020-12-11 | 黑龙江工业学院 | Construction method of mine hole support column |
| WO2022193598A1 (en) * | 2021-03-17 | 2022-09-22 | 中建科工集团有限公司 | Back-jacking supporting structure and construction method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106351462A (en) * | 2016-10-18 | 2017-01-25 | 广东省建筑科学研究院集团股份有限公司 | Temporary steel pipe supported prestressed reinforcement structure and construction method thereof |
| CN206352401U (en) * | 2017-01-06 | 2017-07-25 | 浙江中南建设集团钢结构有限公司 | A kind of concrete structure returns back to top support holding device |
| CN209353781U (en) * | 2018-12-07 | 2019-09-06 | 中建三局第一建设工程有限责任公司 | Based on the construction that returns back to top under the effect of heavy Load concentration |
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2020
- 2020-01-02 CN CN202010001476.2A patent/CN111042579A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351462A (en) * | 2016-10-18 | 2017-01-25 | 广东省建筑科学研究院集团股份有限公司 | Temporary steel pipe supported prestressed reinforcement structure and construction method thereof |
| CN206352401U (en) * | 2017-01-06 | 2017-07-25 | 浙江中南建设集团钢结构有限公司 | A kind of concrete structure returns back to top support holding device |
| CN209353781U (en) * | 2018-12-07 | 2019-09-06 | 中建三局第一建设工程有限责任公司 | Based on the construction that returns back to top under the effect of heavy Load concentration |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677332A (en) * | 2020-05-27 | 2020-09-18 | 中建二局安装工程有限公司 | Adjustable-elevation simple back-jacking support and using method |
| CN112065472A (en) * | 2020-08-06 | 2020-12-11 | 黑龙江工业学院 | Construction method of mine hole support column |
| WO2022193598A1 (en) * | 2021-03-17 | 2022-09-22 | 中建科工集团有限公司 | Back-jacking supporting structure and construction method therefor |
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Application publication date: 20200421 |