CN106400859A - Static pressure applying system for pretest pile - Google Patents
Static pressure applying system for pretest pile Download PDFInfo
- Publication number
- CN106400859A CN106400859A CN201611008171.4A CN201611008171A CN106400859A CN 106400859 A CN106400859 A CN 106400859A CN 201611008171 A CN201611008171 A CN 201611008171A CN 106400859 A CN106400859 A CN 106400859A
- Authority
- CN
- China
- Prior art keywords
- cast
- screw jack
- static pressure
- pretest
- reaction frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/48—Foundations inserted underneath existing buildings or constructions
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D35/00—Straightening, lifting, or lowering of foundation structures or of constructions erected on foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
Abstract
The invention discloses a static pressure applying system for a pretest pile. The static pressure applying system comprises an embedded anchor (1), a reaction frame (2), a screw jack (3), a manual tension meter (4), a steel plate cushion block (5) and a to-be-prestressed pile (6), wherein one end of the embedded anchor (1) is mounted in a foundation platform; the other end of the embedded anchor (1) has threaded connection with one end of the reaction frame (2); connected ends of the reaction frame (2) and the embedded anchor (1) are supported on the foundation platform; the top of the screw jack (3) is welded on the surface of a crossbeam in an inner chamber of the reaction frame (2); the manual tension meter (4) is mounted on a handle of the screw jack (3); the steel plate cushion block (5) is mounted at a middle position between the top of the to-be-prestressed pile (6) and the bottom of the screw jack (3). By adopting the static pressure applying system disclosed by the invention, the problems that the value of the applied pre-stress cannot be obtained concisely and quickly and the pile cannot be sealed quickly when the pre-stress is applied to the pile are solved.
Description
Technical field
The present invention relates to a kind of static pressure bringing device, more particularly, to a kind of pretest pile static pressure application system, belong to building neck
Domain.
Background technology
Pretest pile underpinning technique is initially to build, in New York, a kind of foundation replacement invented during the underground railway of William street
Technology, people's principle according to pretest pile underpinning technique again, jacked pile underpinning technique of having extended out.Both technology substantially former
Reason and basic construction method are identical, and its difference is that jacked pile does not consider to be pressed into resilience, and pretest pile considers in this respect
More perfect.Pretest pile underpinning technique is mainly used in underpinning dilapidated house, ground foundation strengthening, and pile foundation is strengthened, main equipment
The aspects such as basic slope rectifying by jack up, this technology can apply a prestress to all kinds of stakes adopting in advance, and generally obtains
The method applying prestress size is to be read by pre-setting instrument pressure table, needs to remove after the completion of prestress applies
Jack carries out sealing stake work, tedious process and duration lengthening.How succinctly fast effect obtains the size applying prestress, and real
Quick envelope stake after existing prestress applies is the problem needing in pretest pile underpinning technique to solve.
Content of the invention
It is an object of the invention to provide a kind of pretest pile static pressure application system, using a kind of pretest pile static pressure application system
Solve when applying prestress to stake it is impossible to being succinctly quickly obtained applied prestressed size and quickly sealing asking of stake
Topic.
The technical scheme of the offer of the present invention is：A kind of pretest pile static pressure application system, including cast-in fixing bolt, reaction frame,
Screw jack, manual strain gauge and steel plate cushion block, described cast-in fixing bolt one end is arranged in foundation platform；Cast-in fixing bolt is another
One end and reaction frame threaded one end connect, and reaction frame and cast-in fixing bolt connection end are bearing on foundation platform；Screw jack top
Portion is welded in the inner chamber beam surface of reaction frame；Manual strain gauge is arranged on the handle of screw jack；Steel plate cushion block is pacified
It is contained in prestress stake top portion and screw jack bottom centre position.
Described reaction frame is I-shaped steel frame, and described reaction frame has left supporting leg and right supporting leg.
With prestress stake on the same axis, described screw jack has for described screw jack welding position
Self-locking function.
Described cushion block quantity is at least one piece cushion block, and described cushion block is the steel plate of 350mm × 350mm × 20mm.
Described cast-in fixing bolt anchorage depth and foundation platform consistency of thickness, cast-in fixing bolt adopts high duty metal material.
Described left supporting leg and right supporting leg respectively install two cast-in fixing bolts.
Using technical scheme, first pass through the mode of built-in fitting on the basis of cast-in fixing bolt is set, with basis
Cushion cap pours together, cushion cap thickness based on anchorage depth；Reaction frame is arranged on foundation platform by cast-in fixing bolt, and
By screw jack welded top on the crossbeam of reaction frame, welding position makes screw jack and prestress stake in same axle
On line.Cushion block is the steel plate of multi-disc a size of 350mm × 350mm × 20mm, for filling screw jack and prestress stake
Between space, screw jack has self-locking function, and manually strain gauge controls screw jack to prestress stake
Apply prestress, thus realizing the function of the present invention.
The reaction frame of the present invention is I-shaped steel frame, and described reaction frame has left supporting leg and right supporting leg, using I-shaped
Steel frame, I-shaped hardness of steel is high, and highly reliable, supporting leg can bear bigger load.
The screw jack welding position of the present invention and prestress stake are on the same axis so that jack is in effect
When will not produce skew and crooked, thus preferably stress, described screw jack has self-locking function, apply pre-
Convenient control during stress.
The cushion block quantity of the present invention is at least one piece cushion block, and described cushion block is the steel of 350mm × 350mm × 20mm
Plate, can be increased by cushion block and reduce to adjust jack raising and lowering height, cushion block be 350mm × 350mm ×
The steel plate of 20mm, had both facilitated and has installed and transport, and be also convenient for adjustment position, improve work efficiency.
The cast-in fixing bolt anchorage depth of the present invention and foundation platform consistency of thickness, pre-buried depth can ensure that cast-in fixing bolt deeply
More firm, cast-in fixing bolt adopts high duty metal material, and high duty metal increased by force intensity, improves reliability.
The left supporting leg of the present invention and right supporting leg respectively install two cast-in fixing bolts, by the way of left and right is installed, permissible
Ensure supporting leg more stable without produce displacement.
Manually strain gauge controls screw jack to apply prestress to prestress stake, is led to by the reading of strain gauge
Cross jack top power computing formula and can quickly draw exerting oneself of current jack, when reaching prestress design load when exerting oneself,
The auto-lock function of screw jack can play the interim effect sealing stake, the screw thread of screw jack is welded and can play succinctly
Quick long envelope stake effect.
In sum, using technical scheme, can solve when applying prestress to stake it is impossible to succinctly fast
The problem obtaining applied prestressed size and the stake of quick envelope of speed.
Brief description
Fig. 1 is present configuration diagrammatic elevational view；
Fig. 2 illustrates cast-in fixing bolt layout drawing for present configuration；
In figure labelling：1st, cast-in fixing bolt, 2, reaction frame, 3, screw jack, 4, manual strain gauge, 5, steel plate cushion block, 6, pre-
Plus stress stake.
Specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
Referring to shown in Fig. 1～2, a kind of pretest pile static pressure application system, very heavy including cast-in fixing bolt 1, reaction frame 2, spiral
Top 3, manual strain gauge 4, steel plate cushion block 5 and prestress stake 6, cast-in fixing bolt 1 one end is arranged in foundation platform；Cast-in fixing bolt
1 other end and reaction frame 2 threaded one end connect, and reaction frame 2 and cast-in fixing bolt 1 connection end are bearing on foundation platform；Spiral thousand
Jin top 3 welded top are in the inner chamber beam surface of reaction frame 2；Manual strain gauge 4 is arranged on the handle of screw jack 3；
Steel plate cushion block 5 is arranged on prestress stake 6 top and screw jack 3 bottom centre position.
During experiment, according to device needs, be ready to cast-in fixing bolt 1, reaction frame 2, screw jack 3, manual strain gauge 4,
Steel plate cushion block 5 and prestress stake 6.
The mode first passing through built-in fitting installs cast-in fixing bolt 1 on foundation platform, pour with foundation platform together with, anchor
Gu cushion cap consistency of thickness based on depth, it is ensured that cast-in fixing bolt 1 will lead to situation about extracting to occur because of pulling force, improves
Reliability.
In order to increase reaction frame 2 intensity, improve reliability so that supporting leg can bear bigger load, the present invention's is anti-
I-shaped steel frame selected by power frame 2, and reaction frame 2 welds left supporting leg and right supporting leg, left supporting leg and each installation two of right supporting leg
Individual cast-in fixing bolt 1.
After cast-in fixing bolt 1 construction finishes, reaction frame 2 is arranged on foundation platform by cast-in fixing bolt 1.
Then, using welding basis and by screw jack 3 welded top on the crossbeam of reaction frame 2, welding position makes spiral shell
Rotation jack 3 and prestress stake 6 on the same axis so that jack will not produce when effect offsets and crooked,
Thus preferably stress.
Prepare the thick steel plate cushion block 5 of multi-disc a size of 350mm × 350mm × 20mm, for fill screw jack with pre-
Plus the space between stress stake.
Observe the space between screw jack and prestress stake, fill in steel plate cushion block 5 as needed, cushion block is selected
The steel plate of 350mm × 350mm × 20mm, can increase and reduce the raising and lowering height to adjust jack by cushion block,
Cushion block is the steel plate of 350mm × 350mm × 20mm, has both facilitated and has installed and transport, has been also convenient for adjustment position, improves work effect
Rate.
Screw jack 3 has self-locking function, be unlikely to occur jack because unattended when misoperation occurs.
Manual strain gauge 4 is installed on its handle, manually strain gauge 4 controls screw jack 3 to prestress stake 6
Apply prestress, power computing formula is pushed up by screw jack 3 by the reading of manual strain gauge 4 and can quickly draw current thousand
What jin pushed up exerts oneself.
When reaching prestress design load when exerting oneself, the auto-lock function of screw jack 3 can play the interim work sealing stake
With screw thread being welded and can realize succinctly the quickly effect of envelope stake long.
The above, be only presently preferred embodiments of the present invention, not inventing type is made with any pro forma restriction, appoints
What any is simply repaiied according to what the technical spirit of the present invention made to above example without departing from technical solution of the present invention content
Change, equivalent variations and modification, all still fall within the range of technical solution of the present invention.
Claims (6)
1. a kind of pretest pile static pressure application system, including cast-in fixing bolt（1）, reaction frame（2）, screw jack（3）, manual pulling force
Meter（4）, steel plate cushion block（5）With prestress stake（6）It is characterised in that：Described cast-in fixing bolt（1）One end is arranged on basis and holds
In platform；Cast-in fixing bolt（1）The other end and reaction frame（2）Threaded one end connects, reaction frame（2）With cast-in fixing bolt（1）Connection end is propped up
Hold on foundation platform；Screw jack（3）Welded top is in reaction frame（2）Inner chamber beam surface on；Manual strain gauge（4）
It is arranged on screw jack（3）Handle on；Steel plate cushion block（5）It is arranged on prestress stake（6）Top and screw jack（3）
Bottom centre position.
2. a kind of pretest pile static pressure application system according to claim 1 it is characterised in that：Described reaction frame（2）For
I-shaped steel frame, described reaction frame（2）There are left supporting leg and right supporting leg.
3. a kind of pretest pile static pressure application system according to claim 1 it is characterised in that：Described screw jack
（3）Welding position and prestress stake（6）On the same axis, described screw jack（3）There is self-locking function.
4. a kind of pretest pile static pressure application system according to claim 1 it is characterised in that：Described cushion block（5）Quantity
For at least one piece of cushion block（5）, described cushion block（5）Steel plate for 350mm × 350mm × 20mm.
5. a kind of pretest pile static pressure application system according to claim 1 it is characterised in that：Described cast-in fixing bolt（1）
Anchorage depth and foundation platform consistency of thickness, cast-in fixing bolt（1）Using high duty metal material, described cast-in fixing bolt（1）With
Foundation platform pours together.
6. a kind of pretest pile static pressure application system according to claim 2 it is characterised in that：Described left supporting leg and the right side
Supporting leg respectively installs two cast-in fixing bolts（1）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611008171.4A CN106400859A (en) | 2016-11-16 | 2016-11-16 | Static pressure applying system for pretest pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611008171.4A CN106400859A (en) | 2016-11-16 | 2016-11-16 | Static pressure applying system for pretest pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106400859A true CN106400859A (en) | 2017-02-15 |
Family
ID=59230530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611008171.4A Pending CN106400859A (en) | 2016-11-16 | 2016-11-16 | Static pressure applying system for pretest pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106400859A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778928A (en) * | 2019-03-01 | 2019-05-21 | 苏州枫石堂工程科技有限公司 | One kind underpining the prestressed reaction frame of pile foundation offer and its application method for giving |
Citations (7)
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|---|---|---|---|---|
| US3902326A (en) * | 1974-05-16 | 1975-09-02 | Jr George F Langenbach | Apparatus for and method of shoring a foundation |
| CN2120107U (en) * | 1992-04-05 | 1992-10-28 | 中国矿业大学 | Digital display jack |
| CN1071983A (en) * | 1992-09-11 | 1993-05-12 | 管明德 | Anchor beam type hydrostatic piledriving method and equipment thereof |
| CN1182818A (en) * | 1997-07-23 | 1998-05-27 | 夏强 | Pre-applied reverse-force closing-pile construction method and load-applying device |
| CN201110822Y (en) * | 2007-09-14 | 2008-09-03 | 王志伟 | Self-balance multifunctional structure static loaded experiment loading unit |
| CN102226343A (en) * | 2011-04-18 | 2011-10-26 | 上海华铸地基技术有限公司 | Combined anchor-rod static pressure pile |
| CN206233276U (en) * | 2016-11-16 | 2017-06-09 | 贵州正业工程技术投资有限公司 | A kind of pretest pile static pressure bringing device |
-
2016
- 2016-11-16 CN CN201611008171.4A patent/CN106400859A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3902326A (en) * | 1974-05-16 | 1975-09-02 | Jr George F Langenbach | Apparatus for and method of shoring a foundation |
| CN2120107U (en) * | 1992-04-05 | 1992-10-28 | 中国矿业大学 | Digital display jack |
| CN1071983A (en) * | 1992-09-11 | 1993-05-12 | 管明德 | Anchor beam type hydrostatic piledriving method and equipment thereof |
| CN1182818A (en) * | 1997-07-23 | 1998-05-27 | 夏强 | Pre-applied reverse-force closing-pile construction method and load-applying device |
| CN201110822Y (en) * | 2007-09-14 | 2008-09-03 | 王志伟 | Self-balance multifunctional structure static loaded experiment loading unit |
| CN102226343A (en) * | 2011-04-18 | 2011-10-26 | 上海华铸地基技术有限公司 | Combined anchor-rod static pressure pile |
| CN206233276U (en) * | 2016-11-16 | 2017-06-09 | 贵州正业工程技术投资有限公司 | A kind of pretest pile static pressure bringing device |
Non-Patent Citations (1)
| Title |
|---|
| 陆季超，曹少杰: "桥梁加固中新增支座的施工方法", 《科学之友》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778928A (en) * | 2019-03-01 | 2019-05-21 | 苏州枫石堂工程科技有限公司 | One kind underpining the prestressed reaction frame of pile foundation offer and its application method for giving |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170215 |