CN109778928A - One kind underpining the prestressed reaction frame of pile foundation offer and its application method for giving - Google Patents
One kind underpining the prestressed reaction frame of pile foundation offer and its application method for giving Download PDFInfo
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- CN109778928A CN109778928A CN201910154178.4A CN201910154178A CN109778928A CN 109778928 A CN109778928 A CN 109778928A CN 201910154178 A CN201910154178 A CN 201910154178A CN 109778928 A CN109778928 A CN 109778928A
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- pile foundation
- hydraulic jack
- filling pad
- top surface
- reaction beam
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Abstract
The invention discloses one kind to underpin the prestressed reaction frame of pile foundation offer for giving, it is characterized by comprising the reaction beam being mounted on outside pile foundation and two pack supports, the bottom of two pack supports through bolt locking be installed on pile foundation two sides on underpinning cap of pile foundation structure top surface, the both ends of the reaction beam are connected with the top surface of two pack supports respectively, and the reaction beam is set to the surface of the pile foundation；Supporting and limiting device is additionally provided on the top surface of the pile foundation, the bottom of the supporting and limiting device is butted on the top surface of the pile foundation, is butted on the bottom surface of the reaction beam at the top of the supporting and limiting device.The present invention efficiently solves the sedimentation of pile foundation, reduces security risk.
Description
Technical field
The present invention relates to a kind of building field, more particularly to it is a kind of for underpin pile foundation provide prestressed reaction frame and
Its application method.
Background technique
In the prior art, pile foundation is mainly used for the carrying and support of building.But since ground is in a period of time
Afterwards, it may appear that more or less sedimentation will lead to the security risks such as building inclination in this way.Or subsequent load-carrying has been more than to set
The load-carrying of meter can also have biggish security risk.
Therefore, in order to guarantee the safety built, it will do it underpining for pile foundation, that is, carry out the staking replacement of pile foundation.But
It is that in the use process after pile foundation underpinning, can be generated after extraneous load gradually applies up by increased single pile itself
Certain sedimentation, in this way in contingency question, the security risk of building is not able to be resolved.
Summary of the invention
It is an object of the present invention to provide one kind for passing through to the prestressed reaction frame of pile foundation offer and its application method is underpined
Using the structure and method, the settlement issues for underpining pile foundation are effectively solved, guarantee the safety used.
In order to achieve the above objectives, the technical solution adopted by the present invention is that: one kind for underpin pile foundation provide it is prestressed
Reaction frame, including the reaction beam and two pack supports being mounted on outside pile foundation, the bottom of two pack supports is installed on stake through bolt locking
Base two sides to which on underpinning cap of pile foundation structure top surface, the both ends of the reaction beam are connected with the top surface of two pack supports respectively, institute
State the surface that reaction beam is set to the pile foundation；Supporting and limiting device, the support limit are additionally provided on the top surface of the pile foundation
The bottom of position device is butted on the top surface of the pile foundation, and the bottom surface of the reaction beam is butted at the top of the supporting and limiting device
On.
In above-mentioned technical proposal, the bolt embedment is on to underpinning cap of pile foundation structure top surface.
In above-mentioned technical proposal, the supporting and limiting device includes plural groups filling pad, filling pad described in plural groups by
Under it is supreme stacking be placed on the top surface of the pile foundation, filling pad described in bottommost is butted on the pile foundation top surface, top institute
The top surface for stating filling pad is butted on the bottom surface of the reaction beam.
In above-mentioned technical proposal, it is additionally provided with a hydraulic jack, the hydraulic jack is removably placed in the stake
On the top surface of base, the output shaft of the hydraulic jack is butted on the bottom surface of the reaction beam.
In above-mentioned technical proposal, it is additionally provided with a cushion block, the cushion block is placed on the pile foundation top surface, U described in bottommost
Type gasket is butted on the top surface of the cushion block, and the stage of the hydraulic jack is removably placed in the top surface of the cushion block
On.
In above-mentioned technical proposal, the hydraulic jack is placed on pile foundation top surface, installs filling pad described in plural groups
Afterwards, the filling pad surrounds the hydraulic jack, and the hydraulic jack is made to be inserted in the U-type groove of the filling pad
It is interior；There are gaps between ambient and the hydraulic jack inside the filling pad, are used for hydraulic jack prestressing force
Taking-up after the completion of application.
In above-mentioned technical proposal, the bracket includes bottom plate and the riser that is installed vertically in the middle part of plate top surface, the bottom
Plate is lock on ground through the bolt, and the end of the reaction beam is connected with the top of the riser.
In order to achieve the above objectives, present invention employs a kind of for providing the use of prestressed reaction frame to underpining pile foundation
Method the steps include:
After 1. pile foundation completes, first pre-buried multiple groups bolt, the top of pile foundation on the mattess on the outside of pile foundation
It is exposed at the top of mattess；
2. reaction beam passes through the bracket of two sides and is bolted fixation, make reaction beam that the surface of pile foundation is set；
3. first cushion block is placed on the top surface of pile foundation, then hydraulic jack is placed on the top surface of cushion block；
4. the output shaft of hydraulic jack is driven to stretch out, the size of the axle power output of hydraulic jack can be by hydraulic jack
Hydraulic meter reading conversion obtain or using pressure sensor obtain；
5. hydraulic jack output shaft continues to stretch out, until pressure value and setting above hydralic pressure gauge or pressure sensor
Value is consistent, and in this process, the position of reaction beam is constant, and such hydraulic jack can generate a vertical force down and push
Pile foundation generates part and sinks to deforming, to complete prestressed application；
6. covering filling pad in the outside of jack, the thickness of the filling pad is identical or different, described U-shaped
There is spacing between the inner wall of gasket and the outer wall of jack, do not contact, be then successively superimposed multiple groups filling pad, until most pushing up
The filling pad in portion is close to the bottom surface of reaction beam；After completing prestress application, and filling pad is placed after completing, and holding is answered in advance
The stabilization of force value, the deformation between pile foundation and reaction beam due to sinking at the top of the stress of system itself, the deformation of strain and pile foundation
The superposition of two kinds of factors will appear gap, and the same or different filling pad of thickness is inserted into gap according to this, as gap compared with
Tightly, auxiliary external force can be applied with hand hammer to hammer；
7. unclamping hydraulic jack, that is, the output shaft retraction of hydraulic jack, it is certain that such pile foundation can rise recovery
Slight distance, since filling pad is against on the bottom surface of reaction beam, using multiple groups filling pad between pile foundation and reaction beam into
Row limit, prevents the rebound of pile foundation and existing upper lift, to effectively maintain prestressing force；
8. after 48 hours, the position first between range estimation filling pad and reaction beam is with the presence or absence of variation, if do not become
Change, after visual inspection is without exception, hydraulic jack is put between pile foundation and reaction beam, is pressurizeed again using hydraulic jack
Illustrate that stress is in effective maintenance state, by the hydraulic of multiple pressure to the stress numerical of setting if whole system does not change
Jack is removed again, and directly in pile foundation and the surface casting concrete of reaction beam, reaction beam, pile foundation and filling pad are covered
Protection is buried, interference and erosion of the outside climatic to reaction frame system in subsequent use process are prevented, if hydraulic jack
Have found that stress has the case where loose and self-heating unloading after multiple pressure, then repeat 4.~8. the step of, until qualified；
In above-mentioned technical proposal, the step 8. in, lead to not continue to erect if reaction beam occurs bending and deformation
If pressure, then illustrates that the stress of reaction beam cannot access satisfaction, need replacing the bigger reaction beam of intensity, resume at step
2. until qualified.
In above-mentioned technical proposal, the cushion block size matches with the pile foundation top dimension or the size of the cushion block
Greater than the outer diameter of filling pad.
Due to the above technical solutions, the present invention has the following advantages over the prior art:
1. the prestressing force for just applying a constant load in the present invention before underpining pile foundation and using uses single pile subsequent
Deformation in the process is fulfiled ahead of schedule, and after completing this deformation that prestress application mechanism and foundation platform structure is permanent
Rigid connection, this building safety hidden danger can be obtained by effective solution
2. the cooperation of position-limit mechanism and reaction beam can by the setting of support limit mechanism and reaction beam in the present invention
Pile foundation is pushed, so that pile foundation is squeezed pile foundation installation position, prevents the subsequent settlement issues of pile foundation, effectively improve the safety of building
Property, reduce security risk；
3. first reaction beam is fixed in the present invention, the thrust of jack and the fixation of reaction beam, such energy are recycled
It is enough to be pushed away under pile foundation, push pile foundation to sink in advance, recycle filling pad to after sinking pile foundation and reaction frame be supported, both
It can guarantee the case where pile foundation is sunk when subsequent use, effectively improve the safety of building, reduce security risk, and
It is low in cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram in the embodiment of the present invention one；
Fig. 2 is the structural schematic diagram in the embodiment of the present invention one at reaction frame top；
Fig. 3 is the structural schematic diagram of filling pad in the embodiment of the present invention one.
Wherein: 1, reaction beam；2, bracket；3, bolt；4, pile foundation；5, to underpinning cap of pile foundation structure；6, cushion block；7, U-shaped
Gasket；8, hydraulic jack；9, bottom plate；10, riser.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and embodiments:
Embodiment one: referring to shown in Fig. 1~3, one kind underpining the prestressed reaction frame of pile foundation offer, including installation for giving
Reaction beam 1 and two pack supports 2 outside pile foundation 4, the bottoms of two pack supports 2 locked through bolt 3 be installed on 4 two sides of pile foundation to
On 5 top surface of underpinning cap of pile foundation structure, the both ends of the reaction beam are connected with the top surface of two pack supports respectively, and the reaction beam is set
It is placed in the surface of the pile foundation；Supporting and limiting device, the bottom of the supporting and limiting device are additionally provided on the top surface of the pile foundation
Portion is butted on the top surface of the pile foundation, is butted on the bottom surface of the reaction beam at the top of the supporting and limiting device.
The bolt embedment is on to underpinning cap of pile foundation structure top surface.
Ginseng as shown in FIGS. 1 and 2, the supporting and limiting device includes plural groups filling pad 7, filling pad described in plural groups by
Under it is supreme stacking be placed on the top surface of the pile foundation, filling pad described in bottommost is butted on the pile foundation top surface, top institute
The top surface for stating filling pad is butted on the bottom surface of the reaction beam.
It is additionally provided with a hydraulic jack 8, the hydraulic jack is removably placed on the top surface of the pile foundation, described
The output shaft of hydraulic jack is butted on the bottom surface of the reaction beam.
It is additionally provided with a cushion block 6, the cushion block is placed on the pile foundation top surface, and filling pad described in bottommost is butted on described
On the top surface of cushion block, the stage of the hydraulic jack is removably placed on the top surface of the cushion block.In the present embodiment,
Cushion block can be made the outer diameter that equal with pile foundation top dimension or cushion block size is slightly larger than filling pad, can play complete
Supporting role, prevent hydraulic jack or filling pad from damaging the top of pile foundation.If intensity is enough at the top of pile foundation
Words, cushion block, which also can be omitted, not to be had to.
The hydraulic jack is placed on pile foundation top surface, after installing filling pad described in plural groups, the filling pad
The hydraulic jack is surrounded, is inserted in the hydraulic jack in the U-type groove of the filling pad；In the filling pad
There are gaps between the ambient in portion and the hydraulic jack, for taking after the completion of hydraulic jack prestress application
Out.
In the present embodiment, after pile foundation completes, meeting casting concrete layer on the ground of pile foundation periphery at this time can
On the ground by bolt embedment, bracket and reaction beam and bolt are then attached fixation.Hydraulic jack is placed on stake again
Above base, the output shaft of hydraulic jack stretches out, and withstands on its output shaft above reaction beam, and hydraulic jack works on, when
The output shaft of hydraulic jack reach certain dynamics after (by observing the hydralic pressure gauge of hydraulic jack or separately placing one
A more accurate pressure sensor), that is, hydraulic jack pushes pile foundation to sink a certain distance, by pile foundation bottom
Soil compacting compresses, and the pile foundation later period is made to be difficult to continue to sink.Wherein, since the cost of hydraulic jack is higher, then
It is supported using multiple groups filling pad, finally removes hydraulic jack, it in this way being capable of effectively save cost.
Wherein, there are many thickness of filling pad, can be 1 centimetre, 2 centimetres, the different thickness such as 3 centimetres, in U-shaped pad
When piece is placed, the filling pad of corresponding thickness can choose, wherein filling pad is made i.e. using steel disc or iron plate
Can, it is low in cost, it is good that functions and effects are made.
The bracket includes bottom plate 9 and the riser being installed vertically in the middle part of plate top surface 10, and the bottom plate is through the bolt
It lock on ground, the end of the reaction beam is connected with the top of the riser.
In order to achieve the above objectives, present invention employs a kind of for providing the use of prestressed reaction frame to underpining pile foundation
Method the steps include:
After 1. pile foundation completes, first pre-buried multiple groups bolt, the top of pile foundation on the mattess on the outside of pile foundation
It is exposed at the top of mattess；
2. reaction beam passes through the bracket of two sides and is bolted fixation, make reaction beam that the surface of pile foundation is set；
3. first cushion block is placed on the top surface of pile foundation, then hydraulic jack is placed on the top surface of cushion block；
4. the output shaft of hydraulic jack is driven to stretch out, the size of the axle power output of hydraulic jack can be by hydraulic jack
The conversion of hydraulic meter reading obtain or obtained using pressure sensor (pressure sensor setting hydraulic jack and cushion block it
Between)；
5. hydraulic jack output shaft continues to stretch out, until pressure value and setting above hydralic pressure gauge or pressure sensor
Value is consistent, and in this process, the position of reaction beam is constant, and such hydraulic jack can generate a vertical force down and push
Pile foundation generates part and sinks to deforming, to complete prestressed application；
6. covering filling pad in the outside of jack, the thickness of the filling pad is identical or different, described U-shaped
There is spacing between the inner wall of gasket and the outer wall of jack, do not contact, be then successively superimposed multiple groups filling pad, until most pushing up
The filling pad in portion is close to the bottom surface of reaction beam；After completing prestress application, and filling pad is placed after completing, and holding is answered in advance
The stabilization of force value, the deformation between pile foundation and reaction beam due to sinking at the top of the stress of system itself, the deformation of strain and pile foundation
The superposition of two kinds of factors will appear gap, and the same or different filling pad of thickness is inserted into gap according to this, as gap compared with
Tightly, auxiliary external force can be applied with hand hammer to hammer；
7. unclamping hydraulic jack, that is, the output shaft retraction of hydraulic jack, it is certain that such pile foundation can rise recovery
Slight distance, since filling pad is against on the bottom surface of reaction beam, using multiple groups filling pad between pile foundation and reaction beam into
Row limit, prevents the rebound of pile foundation and existing upper lift, to effectively maintain prestressing force；
8. after 48 hours, the position first between range estimation filling pad and reaction beam is with the presence or absence of variation, if do not become
Change, after visual inspection is without exception, hydraulic jack is put between pile foundation and reaction beam, is pressurizeed again using hydraulic jack
Illustrate that stress is in effective maintenance state, by the hydraulic of multiple pressure to the stress numerical of setting if whole system does not change
Jack is removed again, and directly in pile foundation and the surface casting concrete of reaction beam, reaction beam, pile foundation and filling pad are covered
Protection is buried, interference and erosion of the outside climatic to reaction frame system in subsequent use process are prevented, if hydraulic jack
Have found that stress has the case where loose and self-heating unloading after multiple pressure, then repeat 4.~8. the step of, until qualified；
The step 8. in, if reaction beam occurs bending and deformation and leads to not continue to vertical pressure, say
The stress of bright reaction beam cannot access satisfaction, need replacing the bigger reaction beam of intensity, resume at step 2., until closing
Lattice.
The cushion block size and the pile foundation top dimension match or the size of the cushion block is greater than the outer of filling pad
Diameter.It can prevent hydraulic jack and filling pad from damaging the top of pile foundation in this way.Wherein, if the intensity at the top of pile foundation is sufficient
It is enough, cushion block can be not provided with.
In the present embodiment, using the setting of filling pad, both hydraulic jack was disassembled convenient for subsequent, also could
Guarantee pile foundation and reaction beam contact range, guarantees support quality.
Claims (10)
1. one kind underpins the prestressed reaction frame of pile foundation offer for giving, it is characterised in that: anti-outside pile foundation including being mounted on
Power beam and two pack supports, the bottoms of two pack supports through bolt locking be installed on pile foundation two sides to underpinning cap of pile foundation structure top surface
On, the both ends of the reaction beam are connected with the top surface of two pack supports respectively, and the reaction beam is set to the surface of the pile foundation；
Supporting and limiting device is additionally provided on the top surface of the pile foundation, the bottom of the supporting and limiting device is butted on the top surface of the pile foundation
On, it is butted at the top of the supporting and limiting device on the bottom surface of the reaction beam.
2. according to claim 1 underpin the prestressed reaction frame of pile foundation offer for giving, it is characterised in that: the bolt
It is embedded in advance on underpinning cap of pile foundation structure top surface.
3. according to claim 1 underpin the prestressed reaction frame of pile foundation offer for giving, it is characterised in that: the support
Limiting device includes plural groups filling pad, and filling pad described in plural groups stacks the top surface for being placed in the pile foundation from the bottom to top
On, filling pad described in bottommost is butted on the pile foundation top surface, and the top surface of filling pad described in top is butted on the reaction beam
Bottom surface on.
4. according to claim 3 underpin the prestressed reaction frame of pile foundation offer for giving, it is characterised in that: be additionally provided with one
Hydraulic jack, the hydraulic jack are removably placed on the top surface of the pile foundation, the output of the hydraulic jack
Axis is butted on the bottom surface of the reaction beam.
5. according to claim 4 underpin the prestressed reaction frame of pile foundation offer for giving, it is characterised in that: be additionally provided with one
Cushion block, the cushion block are placed on the pile foundation top surface, and filling pad described in bottommost is butted on the top surface of the cushion block, described
The stage of hydraulic jack is removably placed on the top surface of the cushion block.
6. according to claim 4 underpin the prestressed reaction frame of pile foundation offer for giving, it is characterised in that: described hydraulic
Jack is placed on pile foundation top surface, and after installing filling pad described in plural groups, the filling pad is by the hydraulic jack
It surrounds, is inserted in the hydraulic jack in the U-type groove of the filling pad；Ambient and institute inside the filling pad
State between hydraulic jack that there are gaps, for the taking-up after the completion of hydraulic jack prestress application.
7. according to claim 1 underpin the prestressed reaction frame of pile foundation offer for giving, it is characterised in that: the bracket
Including bottom plate and the riser being installed vertically in the middle part of plate top surface, the bottom plate is lock on ground through the bolt, described anti-
The end of power beam is connected with the top of the riser.
8. it is a kind of for providing the application method of prestressed reaction frame to underpining pile foundation, it the steps include:
1. after pile foundation completes, first pre-buried multiple groups bolt, the top of pile foundation are exposed on the mattess on the outside of pile foundation
In the top of mattess；
2. reaction beam passes through the bracket of two sides and is bolted fixation, make reaction beam that the surface of pile foundation is set；
3. first cushion block is placed on the top surface of pile foundation, then hydraulic jack is placed on the top surface of cushion block；
4. the output shaft of hydraulic jack is driven to stretch out, the size of the axle power output of hydraulic jack can be by the liquid of hydraulic jack
Pressure meter reading conversion is obtained or is obtained using pressure sensor；
5. hydraulic jack output shaft continues to stretch out, until pressure value and setting value one above hydralic pressure gauge or pressure sensor
It causes, in this process, the position of reaction beam is constant, and such hydraulic jack can generate a vertical force down and push pile foundation
It generates part to sink to deforming, to complete prestressed application；
6. covering filling pad in the outside of jack, the thickness of the filling pad is identical or different, the filling pad
Inner wall and jack outer wall between have spacing, do not contact, be then successively superimposed multiple groups filling pad, until top U
Type gasket is close to the bottom surface of reaction beam；After completing prestress application, and filling pad is placed after completing, and prestress value is kept
Stabilization, due to sink at the top of the stress of system itself, the deformation of strain and pile foundation two kinds of deformation between pile foundation and reaction beam
The superposition of factor will appear gap, and the same or different filling pad of thickness is inserted into gap according to this, can if gap is tighter
It is hammered with applying auxiliary external force with hand hammer；
7. unclamping hydraulic jack, that is, the output shaft retraction of hydraulic jack, such pile foundation, which can rise, restores centainly micro-
Small distance is limited using multiple groups filling pad between pile foundation and reaction beam since filling pad is against on the bottom surface of reaction beam
Position prevents the rebound of pile foundation and existing upper lift, to effectively maintain prestressing force；
8. after 48 hours, the position first between range estimation filling pad and reaction beam is with the presence or absence of variation, if do not changed,
Visually inspect it is without exception after, hydraulic jack is put between pile foundation and reaction beam, is forced into again using hydraulic jack
The stress numerical of setting illustrates that stress is in effective maintenance state, by hydraulic the thousand of multiple pressure if whole system does not change
Jin top is removed again, and directly in pile foundation and the surface casting concrete of reaction beam, the covering of reaction beam, pile foundation and filling pad is covered
Protection is buried, interference and erosion of the outside climatic to reaction frame system in subsequent use process are prevented, if hydraulic jack is multiple
Have found that stress has the case where loose and self-heating unloading after pressure, then repeat 4.~8. the step of, until qualified；
9. according to claim 8 for providing the application method of prestressed reaction frame to underpining pile foundation, feature exists
In: the step 8. in, if reaction beam occurs bending and deformation and leads to not continue to vertical pressure, illustrate counter-force
The stress of beam cannot access satisfaction, need replacing the bigger reaction beam of intensity, resume at step 2., until qualified.
10. according to claim 8 for providing the application method of prestressed reaction frame to underpining pile foundation, feature exists
In: the cushion block size matches with the pile foundation top dimension or the size of the cushion block is greater than the outer diameter of filling pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910154178.4A CN109778928A (en) | 2019-03-01 | 2019-03-01 | One kind underpining the prestressed reaction frame of pile foundation offer and its application method for giving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910154178.4A CN109778928A (en) | 2019-03-01 | 2019-03-01 | One kind underpining the prestressed reaction frame of pile foundation offer and its application method for giving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109778928A true CN109778928A (en) | 2019-05-21 |
Family
ID=66486020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910154178.4A Pending CN109778928A (en) | 2019-03-01 | 2019-03-01 | One kind underpining the prestressed reaction frame of pile foundation offer and its application method for giving |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204780907U (en) * | 2015-07-06 | 2015-11-18 | 广东省建筑科学研究院集团股份有限公司 | Stake device is sealed in stake of prestressed anchorage pole static pressure among civil engineering |
| WO2016130013A1 (en) * | 2015-02-13 | 2016-08-18 | Tiliaventus B.V. | Construction having foundation for reducing effects of earthquakes |
| CN106400859A (en) * | 2016-11-16 | 2017-02-15 | 贵州正业工程技术投资有限公司 | Static pressure applying system for pretest pile |
| CN106836839A (en) * | 2016-11-29 | 2017-06-13 | 大连久鼎祥瑞特种工程技术研究院有限公司 | Fabric structure jacking increasing layer method |
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2019
- 2019-03-01 CN CN201910154178.4A patent/CN109778928A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016130013A1 (en) * | 2015-02-13 | 2016-08-18 | Tiliaventus B.V. | Construction having foundation for reducing effects of earthquakes |
| CN204780907U (en) * | 2015-07-06 | 2015-11-18 | 广东省建筑科学研究院集团股份有限公司 | Stake device is sealed in stake of prestressed anchorage pole static pressure among civil engineering |
| CN106400859A (en) * | 2016-11-16 | 2017-02-15 | 贵州正业工程技术投资有限公司 | Static pressure applying system for pretest pile |
| CN106836839A (en) * | 2016-11-29 | 2017-06-13 | 大连久鼎祥瑞特种工程技术研究院有限公司 | Fabric structure jacking increasing layer method |
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| Title |
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| 王星华等: "《复杂条件下长大直径桥梁桩基计算理论与试验研究》", 31 January 2018, 中国铁道出版社 * |
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