CN101067303A - Active pile foundation underpinning structure and constructing method thereof - Google Patents
Active pile foundation underpinning structure and constructing method thereof Download PDFInfo
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- CN101067303A CN101067303A CN 200710048462 CN200710048462A CN101067303A CN 101067303 A CN101067303 A CN 101067303A CN 200710048462 CN200710048462 CN 200710048462 CN 200710048462 A CN200710048462 A CN 200710048462A CN 101067303 A CN101067303 A CN 101067303A
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Abstract
The present invention provides one kind of active pile foundation underpin structure, which includes a new underpin pile with pile cap and an underpin beam slab, and has a lifting jack on the pile cap for pre-lifting and unloading the underpin beam slab so as to transfer the load from the pile to be underpinned to the newly constructed underpin structure and realize force conversion. The present invention also provides the construction process of the active pile foundation underpin structure. The present invention makes it possible to control actively the deformation of the upper building to be underpinned, and is suitable for pile foundation underpin with great axial force.
Description
Technical field:
What the present invention relates to is a kind of active pile foundation underpinning structure and job practices thereof, belongs to underpin, pile foundation underpinning field.
Background technology:
When under existing building, building underground construction such as subway, usually to handle, implement pile foundation underpinning, just build underpinning structure by newly executing to existing pile foundation, support post, stake or the basis that need underpin, and the load that it bore is transformed into this newly executes on the underpinning structure of building.The pile foundation underpinning engineering in past generally adopts the carrying scope (as root pile, raft plate etc.) that enlarges pile foundation, perhaps disposable post, stake, the basic structural slab (beam) that links to each other and the formed new construction of new stake that underpins with needs that construct, the post that reduces to underpin, stake or basis stressed, the conversion of realizable force.This traditional pile foundation underpinning structure form has the following disadvantages:
1. the distribution of newly repairing power between structure and the post that need underpin, stake or basis is indeterminate;
2. the building deformation that need underpin when underpining can not be controlled in advance;
3. the building deformation that needs after underpining to underpin can not readjust;
4. only be adapted to existing stressed little post, stake or basic underpining.
Summary of the invention:
In view of above reason, the objective of the invention is to adapt to the active pile foundation underpinning structure of the pile foundation underpinning under the macro-axis power situation for a kind of distortion that can realize the upper building that need underpin from main control is provided.Another object of the present invention is for the job practices of active pile foundation underpinning structure is provided.
The object of the present invention is achieved like this:
Active pile foundation underpinning structure of the present invention, comprise the new stake of underpining of band pile cover, underpin beam slab, underpin on the new stake pile cover and be provided with the jacking jack, and can underpin beam slab by the jacking jack pair and carry out initiatively overload pre-jacking and unloading, thereby the existing load in early stage that bears in the post that needs are underpined, the stake, be delivered to and newly execute on the underpinning structure of building, realization underpins the conversion of the power of pile foundation.
Above-mentioned pile cover and underpin on the beam slab pre-buried respectively steel plate cushion block on the opposite position.
Above-mentioned and the pile cover corresponding position of jacking jack and underpin beam slab pre-buried respectively the steel plate cushion block.
Above-mentioned at pile cover and underpin and be provided with the adjustable foolproof apparatus that highly can regulate between beam slab, there is the bottom to be fixed on steel nut on the pile cover in the adjustable foolproof apparatus, top is the Steel Bolt that cooperates with the steel nut.
Above-mentioned and pile cover adjustable foolproof apparatus correspondence position and underpin pre-buried respectively steel plate cushion block on the beam slab.
Above-mentioned pile cover and underpin and reserved connecting reinforcement and corresponding reinforcing bar connector on the beam slab.
The post that the above-mentioned needs corresponding with underpining beam slab underpin, stake dig out that teeth groove, plantation shear key apply vertically, transverse prestress between the surface.
The job practices of active pile foundation underpinning structure of the present invention, this method comprises the steps:
1), underpins new pile driving construction according to construction operation space, employing hand excavated pile or mechanism's pore-forming stake;
2), at the post that underpins corresponding to the needs that underpin the beam slab position, stake surface cutter teeth groove, plantation shear key;
3), underpin the stake top application worker pile cover of new stake, and pre-embedded steel slab cushion block is reserved connecting reinforcement;
4), make prestressing force and underpin beam slab, and the pre-embedded steel slab cushion block, reserve connecting reinforcement;
5), adjustable foolproof apparatus is installed, and debugging on the steel plate cushion block that underpins new stake pile cover and carriage beam slab;
6), underpin on the steel plate cushion block of new stake pile cover and joist board the jacking jack is installed, and debugging;
7), utilize the classification of jacking jack overload pre-jacking, be offloaded to and cut a pile load, and regulate adjustable foolproof apparatus with jacking, unloading, make to underpin new stake and underpin beam slab and remain reliable power transmission;
8), the old stake of substep amputation, finish load by old stake to new stake conversion;
9), will underpin new stake pile cover and the connecting reinforcement that underpins between the beam slab, connect by reinforcing bar connector steel bushing, will underpin new pile cover again and underpin space concreting between the beam slab, finish underpining engineering;
10), take out the jacking jack, offer follow-up engineering and use.
The present invention underpins between beam (plate) and the post that need underpin, the stake and connects into stressed integral body by the shearing resistance contact, the shearing resistance contact is that teeth groove, plantation shear key are dug out in the post, the stake surface that underpin at the needs corresponding with underpining beam (plate), and applies vertical, horizontal prestressing force by docking point and form.Underpin new stake pile cover is set, pre-buried steel plate cushion block on the pile cover is to place jacking jack, adjustable foolproof apparatus.Utilize the jacking jack initiatively to underpin that beam (plate) forms post that the whole needs that are connected underpin, overload pre-jacking, off-load, the existing load that bears shifts on newly-built underpinning structure in the post that realization need underpin, the stake; Utilize adjustable foolproof apparatus, strengthen the structural stability in the underpinning construction process.
Underpin new stake pile cover and underpin beam (plate) and reserved connecting reinforcement and corresponding reinforcing bar connector (steel bushing), in the conversion of finishing the power that underpins pile foundation, after the amputation stake, reserved steel bar is coupled together with reinforcing bar connector (steel bushing), and to underpining new stake pile cover and underpining that the space builds up integral body with concrete casting between beam (plate).
The present invention can realize the distortion of the upper building that need underpin from main control, adapts to the pile foundation underpinning under the macro-axis power situation.
Description of drawings:
Fig. 1 is an active pile foundation underpinning structure schematic diagram of the present invention.
Fig. 2 is provided with, plants the shear key schematic diagram for the shearing resistance contact teeth groove that underpins between beam (plate) and the post that need underpin, the stake.
Fig. 3 is the A-A sectional drawing of Fig. 2.
Fig. 4 arranges schematic diagram for underpining beam (plate) longitudinal prestressing cable wire.
Fig. 5 is the B-B sectional view of Fig. 4.
Fig. 6 is the 1-1 sectional view of Fig. 4.
Fig. 7 is the C-C sectional view of Fig. 6.
Fig. 8 arranges schematic diagram for underpining beam (plate) transverse prestressed reinforcing steel bar.
Fig. 9 is for underpining new stake pile cover and underpining new and be connected the contact schematic diagram.
Figure 10 is the D-D sectional view of Fig. 8.
Figure 11 is the vertical view of Figure 10.
The specific embodiment:
Referring to Fig. 1～Fig. 9, underpin new stake 2 among the present invention, underpin beam slab 3.Underpin new stake 2 and can adopt hand excavated pile or mechanical hole building stake according to construction operation space; The post that need underpin, stake 1 are that post, a stake surface by underpining at needs is provided with shearing resistance teeth groove 8, plantation shear key (reinforcing bar, steel member) 9 corresponding to the shearing resistance contact 4 that underpins beam (plate) 3 places, and to this contact apply longitudinal prestressing 10, transverse prestress 11 is realized;
Referring to Figure 10, Figure 11, above-mentioned underpin on the new top stake pile cover 6 placed jacking jack 5 and adjustable foolproof apparatus 12, and underpins beam (plate) at the new stake of underpining of its relevant position pile cover, gone up steel plate cushion block 13a, 13b, 13c, 13d pre-buried.Have respectively in the adjustable foolproof apparatus 12 be fixed on steel nut 12a on steel plate cushion block 13c, the 13d and that work in coordination,, Steel Bolt 12b.
Referring to Figure 10, Figure 11, it is above-mentioned that to underpin new stake be not once to execute to build up integral body with the contact that underpins beam (plate), be by underpin new pile head and with it the beam (plate) that underpins of correspondence position go up to reserve connecting reinforcement 14, post, the pile load that need underpin in the later stage is transformed into newly to be executed on the underpinning structure of building, after blocking old stake 7, connect by reinforcing bar connector (as steel bushing) 15 again, and concreting forms integral body.
Above-mentioned adjustable foolproof apparatus 12 is perfectly safe in order to ensure in the pile foundation underpinning process, its operation will be with loading the jack synchronization lifting, the use that underpins the stable of beam body and load jack is played the security insurance effect, and these three foolproof apparatuss will for good and all place in the steel bar concrete connector between joist, new stake.
The job practices of this active underpinned pile based structures is as follows:
1, underpins new stake 2 constructions:, adopt hand excavated pile or mechanism's pore-forming stake according to construction operation space;
2, at the post that underpins corresponding to the needs that underpin beam (plate) 3 positions, stake 1 surface cutter teeth groove 8, plantation shear key 9;
3, underpin the stake top application worker pile cover 6 of new stake 2, and pre-embedded steel slab cushion block 13a, 13b, reserve connecting reinforcement 14;
4, make prestressing force and underpin beam (plate) 2, and pre-embedded steel slab cushion block 13c, 13d, reservation connecting reinforcement 14;
5, at the adjustable foolproof apparatus 12 of the last installation of steel plate cushion block 13b, 13d that underpins new stake pile cover 6 and truss girder (plate) 2, and debugging;
6, underpin steel plate cushion block 13a, the last installation of the 13c jacking jack 5 of new stake pile cover 6 and joist (plate) 2, and debugging;
7, utilize 5 classifications of jacking jack overload pre-jacking, be offloaded to and cut a pile load, and regulate adjustable foolproof apparatus 12 with jacking, unloading, make to underpin new stake 2 and underpin beam (plate) 3 and remain reliable power transmission;
8, the old stake 7 of substep amputation is finished load and is changed to new stake by old stake;
9, will underpin new stake pile cover 6 and the connecting reinforcement 14 that underpins between the beam (plate) 3, connect, will underpin new pile cover 6 again and underpin space concreting between the beam (plate) 3, finish underpining engineering by reinforcing bar connector (steel bushing) 15;
10, take out jacking jack 5, offer follow-up engineering and use.
The foregoing description is that foregoing of the present invention is further described, but this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to the foregoing description.All technology that realizes based on foregoing all belong to scope of the present invention.
Claims (8)
1, active pile foundation underpinning structure, comprise the new stake of underpining of band pile cover, underpin beam slab, underpin on the new stake pile cover and be provided with the jacking jack, and can underpin beam slab by the jacking jack pair and carry out initiatively overload pre-jacking and unloading, thereby the existing load in early stage that bears in the post that needs are underpined, the stake, be delivered to and newly execute on the underpinning structure of building, realization underpins the conversion of the power of pile foundation.
2, active pile foundation underpinning structure as claimed in claim 1 is characterized in that pile cover and underpins on the beam slab pre-buried respectively steel plate cushion block on the opposite position.
3, active pile foundation underpinning structure as claimed in claim 1 or 2, it is characterized in that with the pile cover of the corresponding position of jacking jack and underpin beam slab pre-buried respectively the steel plate cushion block.
4, active pile foundation underpinning structure as claimed in claim 1 or 2, it is characterized in that at pile cover and underpin being provided with the adjustable foolproof apparatus that highly can regulate between beam slab, have the bottom to be fixed on steel nut on the pile cover in the adjustable foolproof apparatus, top is the Steel Bolt that cooperates with the steel nut.
5, active pile foundation underpinning structure as claimed in claim 4 is characterized in that with the pile cover of adjustable foolproof apparatus correspondence position and underpins pre-buried respectively steel plate cushion block on the beam slab.
6, active pile foundation underpinning structure as claimed in claim 1 is characterized in that pile cover and underpins having reserved connecting reinforcement and corresponding reinforcing bar connector on the beam slab.
7, active pile foundation underpinning structure as claimed in claim 1 is characterized in that digging out between post that the needs corresponding with underpining beam slab underpin, stake surface that teeth groove, plantation shear key apply vertically, transverse prestress.
8, the job practices of active pile foundation underpinning structure, this method comprises the steps:
1), underpins new pile driving construction according to construction operation space, employing hand excavated pile or mechanism's pore-forming stake;
2), at the post that underpins corresponding to the needs that underpin the beam slab position, stake surface cutter teeth groove, plantation shear key;
3), underpin the stake top application worker pile cover of new stake, and pre-embedded steel slab cushion block is reserved connecting reinforcement;
4), make prestressing force and underpin beam slab, and the pre-embedded steel slab cushion block, reserve connecting reinforcement;
5), adjustable foolproof apparatus is installed, and debugging on the steel plate cushion block that underpins new stake pile cover and carriage beam slab;
6), underpin on the steel plate cushion block of new stake pile cover and joist board the jacking jack is installed, and debugging;
7), utilize the classification of jacking jack overload pre-jacking, be offloaded to and cut a pile load, and regulate adjustable foolproof apparatus with jacking, unloading, make to underpin new stake and underpin beam slab and remain reliable power transmission;
8), the old stake of substep amputation, finish load by old stake to new stake conversion;
9), will underpin new stake pile cover and the connecting reinforcement that underpins between the beam slab, connect by reinforcing bar connector steel bushing, will underpin new pile cover again and underpin space concreting between the beam slab, finish underpining engineering;
10), take out the jacking jack, offer follow-up engineering and use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710048462 CN101067303A (en) | 2007-02-13 | 2007-02-13 | Active pile foundation underpinning structure and constructing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710048462 CN101067303A (en) | 2007-02-13 | 2007-02-13 | Active pile foundation underpinning structure and constructing method thereof |
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| CN101067303A true CN101067303A (en) | 2007-11-07 |
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Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476339A (en) * | 2009-01-15 | 2009-07-08 | 叶长青 | Method for reinforcing strip foundation by shoulder pole girder |
| CN102277885A (en) * | 2011-05-11 | 2011-12-14 | 中铁二院工程集团有限责任公司 | Method for underpinning pile foundation of high-speed railway continuous rigid frame bridge |
| CN102587359A (en) * | 2012-03-30 | 2012-07-18 | 中建三局建设工程股份有限公司 | Reusable reinforced concrete composite pile available for on-load segmental disassembly and construction method of reusable reinforced concrete composite pile available for on-load segmental disassembly |
| CN102733429A (en) * | 2012-06-29 | 2012-10-17 | 广州市胜特建筑科技开发有限公司 | Underpinning method for new tunnel to pass through existing building and underpinning system |
| CN102864788A (en) * | 2012-10-19 | 2013-01-09 | 江苏华通工程检测有限公司 | Method for underpinning reinforced bridge pile foundation by bear-type static pressure cluster pile |
| CN103061364A (en) * | 2013-01-15 | 2013-04-24 | 广州市市政工程设计研究院 | Prestressed pile foundation underpinning structure and construction method thereof |
| CN103075020A (en) * | 2013-02-04 | 2013-05-01 | 广州市胜特建筑科技开发有限公司 | Steel tray supporting force transferring system |
| CN103774674A (en) * | 2014-01-15 | 2014-05-07 | 西安建筑科技大学 | Support structure for steel tube underpinned pile and anchor rod deep pit and construction method thereof |
| CN103981816A (en) * | 2014-04-15 | 2014-08-13 | 河南省公路工程局集团有限公司 | Construction method for underpinning of overpass framework pier columns |
| CN106703092A (en) * | 2017-03-13 | 2017-05-24 | 兰州铁道设计院有限公司 | Connecting structure and method for foundation piles and bearing platform in pile foundation underpinning |
| CN108316368A (en) * | 2018-01-26 | 2018-07-24 | 中铁隧道集团二处有限公司 | A kind of bridge pile foundation active support and change method for the only stake of only column |
| CN108330845A (en) * | 2018-01-26 | 2018-07-27 | 中铁隧道集团二处有限公司 | A kind of reinforcement means of curve bridge underpinning |
| CN108798681A (en) * | 2018-06-15 | 2018-11-13 | 中铁第勘察设计院集团有限公司 | What middle hole method zero distance passed through existing subway station underpins system and its construction method |
| CN109356210A (en) * | 2018-11-21 | 2019-02-19 | 兰州理工大学 | A kind of pile foundation building inclination rectification cuts stake and underpins position limiting structure and its construction method |
| CN109372011A (en) * | 2018-12-03 | 2019-02-22 | 中铁三局集团有限公司 | Large-volume prestressed beam underpinning structure and the method for carrying out pile foundation underpinning with the structure |
| CN110725349A (en) * | 2019-10-22 | 2020-01-24 | 中铁十局集团第八工程有限公司 | Bearing platform replacement construction device and method for canopy column of high-speed rail station |
| CN111550261A (en) * | 2020-04-29 | 2020-08-18 | 中铁二院工程集团有限责任公司 | Railway tunnel bottom bulging deformation treatment structure and construction method |
| CN112449661A (en) * | 2019-07-04 | 2021-03-05 | 韩国建设技术研究院 | Preloading device for adjusting load and method for reinforcing foundation using the same |
| CN113323011A (en) * | 2021-06-30 | 2021-08-31 | 武汉武建机械施工有限公司 | Novel underpinning construction method for steel pipe under existing building foundation |
| CN113529830A (en) * | 2021-07-05 | 2021-10-22 | 山东建筑大学 | Shallow tunnel adjacent building isolation-underpinning combined reinforcement structure and construction process thereof |
| CN114703895A (en) * | 2022-03-04 | 2022-07-05 | 中铁第五勘察设计院集团有限公司 | Reinforced structure and construction method for small-included-angle downward-penetrating construction of open-cut tunnel |
| CN116971430A (en) * | 2023-09-21 | 2023-10-31 | 中交四航局第一工程有限公司 | Bridge pile foundation underpinning construction and deformation control method |
| CN118110217A (en) * | 2024-04-29 | 2024-05-31 | 四川省建筑科学研究院有限公司 | Existing building foundation reinforcement structure and reinforcement method |
-
2007
- 2007-02-13 CN CN 200710048462 patent/CN101067303A/en active Pending
Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476339A (en) * | 2009-01-15 | 2009-07-08 | 叶长青 | Method for reinforcing strip foundation by shoulder pole girder |
| CN102277885A (en) * | 2011-05-11 | 2011-12-14 | 中铁二院工程集团有限责任公司 | Method for underpinning pile foundation of high-speed railway continuous rigid frame bridge |
| CN102587359A (en) * | 2012-03-30 | 2012-07-18 | 中建三局建设工程股份有限公司 | Reusable reinforced concrete composite pile available for on-load segmental disassembly and construction method of reusable reinforced concrete composite pile available for on-load segmental disassembly |
| CN102733429A (en) * | 2012-06-29 | 2012-10-17 | 广州市胜特建筑科技开发有限公司 | Underpinning method for new tunnel to pass through existing building and underpinning system |
| CN102864788A (en) * | 2012-10-19 | 2013-01-09 | 江苏华通工程检测有限公司 | Method for underpinning reinforced bridge pile foundation by bear-type static pressure cluster pile |
| CN103061364A (en) * | 2013-01-15 | 2013-04-24 | 广州市市政工程设计研究院 | Prestressed pile foundation underpinning structure and construction method thereof |
| CN103075020A (en) * | 2013-02-04 | 2013-05-01 | 广州市胜特建筑科技开发有限公司 | Steel tray supporting force transferring system |
| CN103075020B (en) * | 2013-02-04 | 2016-01-13 | 广州市胜特建筑科技开发有限公司 | A kind of steel tray supports actuating system |
| CN103774674B (en) * | 2014-01-15 | 2016-04-13 | 西安建筑科技大学 | A kind of steel pipe underpinned pile and anchor pole deep foundation pit supporting structure and construction method thereof |
| CN103774674A (en) * | 2014-01-15 | 2014-05-07 | 西安建筑科技大学 | Support structure for steel tube underpinned pile and anchor rod deep pit and construction method thereof |
| CN103981816A (en) * | 2014-04-15 | 2014-08-13 | 河南省公路工程局集团有限公司 | Construction method for underpinning of overpass framework pier columns |
| CN106703092A (en) * | 2017-03-13 | 2017-05-24 | 兰州铁道设计院有限公司 | Connecting structure and method for foundation piles and bearing platform in pile foundation underpinning |
| CN108316368A (en) * | 2018-01-26 | 2018-07-24 | 中铁隧道集团二处有限公司 | A kind of bridge pile foundation active support and change method for the only stake of only column |
| CN108330845A (en) * | 2018-01-26 | 2018-07-27 | 中铁隧道集团二处有限公司 | A kind of reinforcement means of curve bridge underpinning |
| CN108316368B (en) * | 2018-01-26 | 2020-06-16 | 中铁隧道集团二处有限公司 | Active underpinning method for bridge pile foundation of single-column single pile |
| CN108798681A (en) * | 2018-06-15 | 2018-11-13 | 中铁第勘察设计院集团有限公司 | What middle hole method zero distance passed through existing subway station underpins system and its construction method |
| CN108798681B (en) * | 2018-06-15 | 2023-08-29 | 中铁第一勘察设计院集团有限公司 | Underpinning system for zero-distance crossing existing subway station by middle-hole method and construction method thereof |
| CN109356210A (en) * | 2018-11-21 | 2019-02-19 | 兰州理工大学 | A kind of pile foundation building inclination rectification cuts stake and underpins position limiting structure and its construction method |
| CN109356210B (en) * | 2018-11-21 | 2024-05-07 | 兰州理工大学 | Pile foundation building inclination correction pile interception underpinning limiting structure and construction method thereof |
| CN109372011A (en) * | 2018-12-03 | 2019-02-22 | 中铁三局集团有限公司 | Large-volume prestressed beam underpinning structure and the method for carrying out pile foundation underpinning with the structure |
| CN112449661B (en) * | 2019-07-04 | 2023-01-10 | 韩国建设技术研究院 | Preloading device for adjusting load and method for reinforcing foundation using the same |
| CN112449661A (en) * | 2019-07-04 | 2021-03-05 | 韩国建设技术研究院 | Preloading device for adjusting load and method for reinforcing foundation using the same |
| CN110725349A (en) * | 2019-10-22 | 2020-01-24 | 中铁十局集团第八工程有限公司 | Bearing platform replacement construction device and method for canopy column of high-speed rail station |
| CN110725349B (en) * | 2019-10-22 | 2023-11-21 | 中铁十局集团第八工程有限公司 | Bearing platform replacement construction device and method for high-speed rail station canopy column |
| CN111550261A (en) * | 2020-04-29 | 2020-08-18 | 中铁二院工程集团有限责任公司 | Railway tunnel bottom bulging deformation treatment structure and construction method |
| CN113323011A (en) * | 2021-06-30 | 2021-08-31 | 武汉武建机械施工有限公司 | Novel underpinning construction method for steel pipe under existing building foundation |
| CN113529830A (en) * | 2021-07-05 | 2021-10-22 | 山东建筑大学 | Shallow tunnel adjacent building isolation-underpinning combined reinforcement structure and construction process thereof |
| CN114703895A (en) * | 2022-03-04 | 2022-07-05 | 中铁第五勘察设计院集团有限公司 | Reinforced structure and construction method for small-included-angle downward-penetrating construction of open-cut tunnel |
| CN114703895B (en) * | 2022-03-04 | 2023-11-17 | 中铁第五勘察设计院集团有限公司 | Reinforcing structure for downward penetrating construction of open cut tunnel with small included angle and construction method |
| CN116971430A (en) * | 2023-09-21 | 2023-10-31 | 中交四航局第一工程有限公司 | Bridge pile foundation underpinning construction and deformation control method |
| CN116971430B (en) * | 2023-09-21 | 2023-12-15 | 中交四航局第一工程有限公司 | Bridge pile foundation underpinning construction and deformation control method |
| CN118110217A (en) * | 2024-04-29 | 2024-05-31 | 四川省建筑科学研究院有限公司 | Existing building foundation reinforcement structure and reinforcement method |
| CN118110217B (en) * | 2024-04-29 | 2024-07-05 | 四川省建筑科学研究院有限公司 | Existing building foundation reinforcement structure and reinforcement method |
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