CN201268854Y - Active underpinning structure of hyperstation foot stall or pile foundation - Google Patents
Active underpinning structure of hyperstation foot stall or pile foundation Download PDFInfo
- Publication number
- CN201268854Y CN201268854Y CNU2008201420560U CN200820142056U CN201268854Y CN 201268854 Y CN201268854 Y CN 201268854Y CN U2008201420560 U CNU2008201420560 U CN U2008201420560U CN 200820142056 U CN200820142056 U CN 200820142056U CN 201268854 Y CN201268854 Y CN 201268854Y
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- pile foundation
- underpinning
- pier stud
- crossbeam
- pile
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Abstract
The utility model discloses an active hyperstatic pier stud or pile foundation underpinning structure comprising at least two rows of new piles and underpinning crossbeams, wherein the crossbeams of space continuous latticed structures comprising at least three cross beams, at least two longitudinal beams, top plates and bottom plates; the new piles are connected under the cross beams, and each row of new piles is provided with at least two new piles. The space continuous latticed underpinning structure comprises the cross beams, the longitudinal beams, the top plates, the bottom plates, and the like, the cross beams of the underpinning structure are connected with the original pier stud or pile foundation which is needed to be underpinned into an integral stressed structure through a shearing resistance measure, and load transferred by the underpinned pier stud or pile foundation is borne together by the stressed cross beams, longitudinal beams and new piles of the underpinned structure, thereby structures which are needed to be underpinned are ensured to be safe and stable. The utility model synchronous underpins two or more pier studs or pile foundations.
Description
Technical field
The utility model relates to initiatively underpinning structure, relates in particular to a kind of indeterminate active underpinning structure.
Background technology
At present, the earliest large-scale underpins the Winchester cathedral that one of engineering is a Britain, before underpinning, 900 years have been continued to have sunk, dig pit under water by a dirver in earlier 1900s, pass peat and silt and arrive layer of gravel, tamp with the coagulation mount and carry out foundation underpinning.The foundation underpinning technology is with a long history, but is just developed rapidly when nineteen thirties is built the subterranean railway of New York city,U.S.In the underground railway engineering in early days, need the quantity of underpinning engineering big, type is many, and scale is big, because support technology had been obtained very big progress at that time, thereby to underpin engineering be feasible technically.
Current city both domestic and external is developed to maximization and modernized direction, the construction of a large amount of highrise buildings, concentrating of urban population height, for building of traffic, ventilation, commerce and other people's lives facility, have higher requirement, the space, urban district is more and more narrower, and the only way out is to underground development, builds underground railway, market and other many underground installations.Part highrise building or important historical building often will be passed through in these underground buildings, and this just need carry out underpinning to the basis of existing building thing and handle; The required quantity that underpins of ancient building is various in addition, when the existing building thing need be reconstructed, add layer or strengthen service load, also needs to adopt underpinning technique, and this also promotes the underpinning technique trend to maximize and develops to comprehensive direction.Reinforce underpinning technique and can protect existing building or ancient architecture historical relic effectively; for the construction under specific condition epochmaking effect is arranged; it is a kind of important means that solves the urban construction construction difficult problem; it is a comprehensive technology of new high; it is multidisciplinary to relate to hydrogeology, engineering geology, soil mechanics, structural mechanics etc., and prospecting, monitoring, structure design, construction organization and scientific research etc. have all been proposed very actual problem.Especially Germany is after World War II, in the enlarging and transformation process in many cities, particularly in building the underground railway engineering, adopted comprehensive underpinning technique in large quantities, accumulated rich experience, obtained significant achievement, and this underpinning technique has been enrolled Deutsche industry norm (DIN) (DIN).
China underpin engineering quantity and scale along with the development of infrastructure also in continuous growth, aspect underpinning technique, very big innovation and characteristic are all arranged as anchor pole pressurization correction, anchor jacked pile, basis decompression and reinforcement stiffness method, alkali lye reinforcing, immersion correction, soil digging correction, jack integral jacking and the multiple support and change method on collapsible loess foundation etc.Though the underpinning technique of China is started late, along with the development of Large scale construction cause, underpinning technique is in the ascendant and flourish period.
All ran into the pile foundation underpinning problem in underground engineering construction at home and abroad and the subway construction, pile foundation underpinning relates to the many aspects of civil engineering technology, has comprehensive strong, each professional combination and requires characteristics such as height, environment and safety are outstanding.
At home and abroad in the engineering practice of pile foundation underpinning, more representational have following four:
First is to adopt the initiatively kyoto, Japan subway station of underpinning technique, be characterized in the axle power higher (axle power reaches 585 tons) of underpinned pile, when underpining to having been carried out settlement monitoring by underpinned pile, carried out strictness control by the sedimentation of underpinned pile when underpining, control criterion is last top 1.0mm, sedimentation 3.0mm.It once applies 5850kN power, and works is 3.2mm by jacking 0.68mm and cut stake back sedimentation actual, slightly exceeds displacement control desired value.
Second is the Guangzhou Underground eastern station of adopting passive underpinning technique, be characterized in: pile foundation axle power and diameter less (it is only 800mm of 250 tons, maximum gauge that maximum underpins design load), underpinned pile quantity many (about 150), the underpinning construction measure is simple, and the distortion of stake top can not artificially be controlled.
The 3rd is to adopt the initiatively general merchandise square pile foundation underpinning engineering of the Shenzhen Metro of underpinning technique, be characterized in the axle power height (axle power reaches 1890 tons) of underpinned pile, when underpining to having been carried out settlement monitoring by underpinned pile, carried out strictness control by the sedimentation of underpinned pile when underpining, 6 velamens underpin the post maximum and are respectively 3.69mm and 2.07mm with minimum settling amount, and peripheral proximity structure post maximum settlement amount is 7.77mm; Quilt is underpined post and adjacent beam slab has carried out comprehensive inspection, finds the development of newly-increased crack and existing crack.Proved that fully it is successful adopting the active underpinning technique to carry out general merchandise square macro-axis power pile foundation underpinning.
The 4th also is to adopt the Guangzhou-Shenzhen railway bridge pier base of the Shenzhen Metro of active underpinning technique to change engineering, the characteristics of this project are: (1) engineering is in the busiest section of Shenzhen's commerce, reinforcing meeting long duration to railway bridge takies road width, must carry out traffic and discongest, various roads are with must accurately locating and remove with civilian line distribution is intricate under the Guangzhou-Shenzhen railway bridge; (2) Guangzhou-Shenzhen railway high speed and quasi high speed train operation are busy, and construction brings bigger difficulty to the train dynamic load to pile foundation underpinning; (3) the continuous strict control of girder construction of the Guangzhou-Shenzhen railway bridging at the place of underpining underpins the distortion and the displacement warning value of bridge pier.Construction monitoring and manipulation accuracy require high.Circuit withholds rail and the foundation underpinning technical difficulty is big.(4) work items is many and complicated, comprise that rotary churning pile is gone along with sb. to guard him, the stratum grouting and reinforcing, apply hole digging pile, steel bracket and withhold that rail hardened link prestressing force underpins the beam construction and basic jacking underpins operation etc., whole construction course must be carried out the whole process monitoring to railway bridge, guarantees that every displacement deformation, sedimentation value are controlled in the allowed band.After active underpined and finishes, being underpined the maximum lift-off value of bridge pier was 3mm; The subway tunneling cuts stake by railway bridge after following 3 months, and the bridge pier sedimentation tends towards stability, accumulative total maximum settlement value 1.8mm, and much smaller than the warning value of sedimentation maximum permissible value 5.0mm, underpinning construction reaches the expection requirement.
More than underpining engineering is and adopts two new stakes and freely-supported entity to underpin girder construction to underpin single pier stud or pile foundation.When needs carry out initiatively underpining to two pier studs simultaneously, or the load that bears of the pile foundation that underpins or pier stud when excessive, above-mentioned underpinning structure will be difficult to be suitable for.
The utility model content
The purpose of this utility model is just in order to overcome above-mentioned deficiency of the prior art, provide a kind of can be at least two adjacent pier studs or pile foundation underpins simultaneously, can strengthen initiatively underpinning structure of the indeterminate pier stud of supporting capacity or pile foundation.
The utility model is achieved by following technical proposals: a kind of indeterminate pier stud or pile foundation be underpinning structure initiatively, comprise new stake, underpin crossbeam, described crossbeam is the continuous cancelled structure in space that is made of crossbeam, longeron, top board, base plate, described crossbeam is at least three, described longeron is at least two, described new stake is at least two rows, be connected crossbeam below, new of every row is at least 2.
Described crossbeam is 5, and described longeron is 2, and the new stake of every row is 3.
Described crossbeam is 3, and the new stake of every row is 2.
Described new stake is a friction pile.
Described new stake is long to be 40～90m.
Be provided with shear structure between described crossbeam and former pier stud that need underpin or pile foundation, shear structure adopts and adopt the pre-buried shear reinforcement of bar planting mode on former pier stud or pile foundation, and digs the antiskid groove on former pier stud or pile foundation.
The beneficial effects of the utility model are: members such as crossbeam, longeron, top, base plate and new stake form the continuous lattice underpinning structure in space, connect into whole stressed structure by the shearing resistance measure between the crossbeam of underpinning structure and former pier stud that need underpin or pile foundation, it is stressed jointly by crossbeam, longeron and the new stake of underpinning structure to be underpined the load that pier stud or pile foundation transmission get off, bear load, the works that assurance need underpin safe, stable; The utility model has been realized pier stud more than two and two or pile foundation are underpined processing simultaneously.For underpining simultaneously to many pier studs, Other Engineering lays a good foundation; What new stake of the present utility model was adopted is friction pile.Realized the application of friction pile in underpinning structure, made the underpinning structure can also can successful implementation under comparatively disadvantageous geological conditions.The continuous lattice underpinning structure in space adopts many new stakes as single new stake, solved since the load that bears of the pile foundation that underpins or pier stud excessive, and the single new pile capacity of a side is not enough to bear the technical problem that underpins load.The single structure that underpins beam that the layout of many longerons and the setting of roof and floor also make the integral rigidity of underpinning structure compare and adopted in the past strengthens a lot, has strengthened the supporting capacity of underpinning structure greatly.
Description of drawings
Fig. 1 is the utility model plane structure schematic diagram;
Fig. 2 is the utility model facade structures schematic diagram;
Fig. 3 is the A-A sectional view of Fig. 1.
Among the figure: 1, longeron, 2, crossbeam, 3, new stake, 4, top board, 5, base plate, 6, pier stud.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described:
As shown in Figure 1 to Figure 3, a kind of indeterminate pier stud or pile foundation be underpinning structure initiatively, comprise new stake 3, underpin crossbeam, described crossbeam is the continuous cancelled structure in space that is made of crossbeam, longeron 1, top board 4, base plate 5, described crossbeam is five, and described longeron 1 is two, and described new stake 3 is three rows, be connected crossbeam below, the new stake 3 of every row is three.Underpin two pier studs 6 simultaneously.
Implementation step is as follows:
Step 1: the new stake 3 of construction, treat that new stake detects no mass defect after, arrange jack and mechanical self-locking device thereof in the stake top, new 3 is friction piles, length is 40～90m.
Step 2: construction underpins longeron 1, crossbeam A2-1, crossbeam C2-3, the crossbeam E2-5 of crossbeam, arrange stake top horizontal restraint, construction pier stud dowel and tongue and groove (promptly adopt the pre-buried shear reinforcement of bar planting mode, and dig the antiskid groove on former pier stud or pile foundations on pier stud.) after the concrete strength of longeron to be built, crossbeam A, C, E reaches 90%, half prestressing force of pretensioning crossbeam A, C, D prestressed reinforcement, the prestressed reinforcement of stretch-draw longeron again, stretch-drawing beam A, C, D prestressed reinforcement remain the prestressing force of half again.
Step 3: construction crossbeam B2-2, crossbeam D2-4, after the concrete strength of waiting to build crossbeam B, D reaches 90%, the prestressed reinforcement of stretch-drawing beam B, D, cast underpins the top board and the base plate of crossbeam, has so far finished the cast that underpins crossbeam.Formed shear structure between crossbeam B, D and the pier stud that need underpin.
Step 4: jack upwards applies top lift, new stake top with underpin top lift between the crossbeam and divide 10 grades to reach 100% and underpin load so that most of sedimentation is finished in new stake as early as possible, finish every grade of loading and to carry out subordinate's loading after stablizing at least one hour.
Step 5: jack is offloaded to and underpins 85% of load, and stable back substep cuts pier,, then stop to cut a pier near controlling value as sedimentation, and jacking underpins crossbeam, cuts pier behind the settlement stability again, and repetitive operation is until finishing blocking of pier stud.Pier stud blocks the back underpining crossbeam and underpining steady pad of pad between the new stake, needs to keep the operability of jack jacking this moment.
Step 6: later stage observation, treat new stake settlement stability, underpin the crossbeam distortion and stablize, and after not needing to be out of shape adjustment, underpin being connected of crossbeam and new stake, finally finish underpining.
Present embodiment underpins two pier studs simultaneously, and the continuous cancelled structure in space that underpins crossbeam adopts five crossbeams, two longerons, new stake three rows, three of every rows.But structure of the present utility model is not limited to this, for example when needs underpin three pier studs, the crossbeam that underpins of the present utility model will adopt seven crossbeams, new stake four rows, the single quantity of new stake also can adopt four, five etc. according to load situation, in like manner, longeron is according to the load distribution situation, and also visual concrete condition can adopt three or four etc.
Certainly the utility model also can be used for underpining a pier stud, can utilize this moment the utility model to underpin the continuous cancelled structure in space of crossbeam and coupled single many new stakes, solve because the load that the pier stud that underpins bears is excessive, and the single new pile capacity of a side is not enough to bear the technical problem that underpins load.The single structure that underpins beam that the layout of many longerons and the setting of roof and floor also make the integral rigidity of underpinning structure compare and adopted in the past strengthens a lot, has strengthened the supporting capacity of underpinning structure greatly.For example crossbeam is 3, and the new stake of every row is 2.
Although in conjunction with the accompanying drawings preferred embodiment of the present utility model is described above; but the utility model is not limited to the above-mentioned specific embodiment; as long as initiatively the crossbeam that underpins of underpinning structure adopts the continuous cancelled structure in space that is made of crossbeam, longeron, top board, base plate; the single new stake that is connected under the crossbeam is more than two; all drop in the protection domain of the present utility model, for example the utility model also can be used for underpining pile foundation.The above-mentioned specific embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; do not breaking away under the scope situation that the utility model aim and claim protect; can also make a lot of forms, these all belong within the protection domain of the present utility model.
Claims (6)
1. indeterminate pier stud or pile foundation underpinning structure initiatively, comprise new stake, underpin crossbeam, it is characterized in that, described crossbeam is the continuous cancelled structure in space that is made of crossbeam, longeron, top board, base plate, described crossbeam is at least three, and described longeron is at least two, and described new stake is at least two rows, be connected crossbeam below, the new stake of every row is at least two.
2. indeterminate pier stud according to claim 1 or pile foundation be underpinning structure initiatively, it is characterized in that described crossbeam is 5, and described longeron is 2, and the new stake of every row is 3.
3. indeterminate pier stud according to claim 1 or pile foundation be underpinning structure initiatively, it is characterized in that described crossbeam is 3, and the new stake of every row is 2.
4. indeterminate pier stud according to claim 3 or pile foundation be underpinning structure initiatively, it is characterized in that, described new stake is a friction pile.
5. indeterminate pier stud according to claim 4 or pile foundation be underpinning structure initiatively, it is characterized in that, described new stake is long to be 40～90m.
6. according to described indeterminate pier stud of one of claim 1～5 or pile foundation active underpinning structure, it is characterized in that, be provided with shear structure between described crossbeam and pier stud that need underpin or pile foundation, shear structure adopts and adopt the pre-buried shear reinforcement of bar planting mode on former pier stud or pile foundation, and digs the antiskid groove on former pier stud or pile foundation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201420560U CN201268854Y (en) | 2008-09-19 | 2008-09-19 | Active underpinning structure of hyperstation foot stall or pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201420560U CN201268854Y (en) | 2008-09-19 | 2008-09-19 | Active underpinning structure of hyperstation foot stall or pile foundation |
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| Publication Number | Publication Date |
|---|---|
| CN201268854Y true CN201268854Y (en) | 2009-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201420560U Expired - Lifetime CN201268854Y (en) | 2008-09-19 | 2008-09-19 | Active underpinning structure of hyperstation foot stall or pile foundation |
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| CN (1) | CN201268854Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806377A (en) * | 2014-02-25 | 2014-05-21 | 福建建工集团总公司 | Overall bridge large-tonnage and multi-pile-foundation active underpinning structure and underpinning method |
| CN109797665A (en) * | 2019-01-29 | 2019-05-24 | 北京城建设计发展集团股份有限公司 | Statically indeterminate structure bridge pile foundation actively underpins top lift determination and displacement control method |
| CN110409487A (en) * | 2019-08-13 | 2019-11-05 | 苏交科集团股份有限公司 | A kind of pile foundation underpinning structure for city tunnel newly-built below bridge |
| CN112227232A (en) * | 2020-10-16 | 2021-01-15 | 浙江大学 | Pier upright post underpinning method of pier-beam consolidation continuous beam bridge |
-
2008
- 2008-09-19 CN CNU2008201420560U patent/CN201268854Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806377A (en) * | 2014-02-25 | 2014-05-21 | 福建建工集团总公司 | Overall bridge large-tonnage and multi-pile-foundation active underpinning structure and underpinning method |
| CN109797665A (en) * | 2019-01-29 | 2019-05-24 | 北京城建设计发展集团股份有限公司 | Statically indeterminate structure bridge pile foundation actively underpins top lift determination and displacement control method |
| CN110409487A (en) * | 2019-08-13 | 2019-11-05 | 苏交科集团股份有限公司 | A kind of pile foundation underpinning structure for city tunnel newly-built below bridge |
| CN112227232A (en) * | 2020-10-16 | 2021-01-15 | 浙江大学 | Pier upright post underpinning method of pier-beam consolidation continuous beam bridge |
| CN112227232B (en) * | 2020-10-16 | 2021-09-28 | 浙江大学 | Pier upright post underpinning method of pier-beam consolidation continuous beam bridge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Tianjin Saiying Engineering Construction Consulting Management Co., Ltd. Assignor: Tianjin City Design Inst. of Municipal Engineering Contract record no.: 2010120000178 Denomination of utility model: Active underpinning structure of hyperstation foot stall or pile foundation and construction method thereof Granted publication date: 20090708 License type: Exclusive License Record date: 20101220 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090708 |