CN102493431A - Real time monitoring strengthening method preventing pile foundation from descending - Google Patents
Real time monitoring strengthening method preventing pile foundation from descending Download PDFInfo
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- CN102493431A CN102493431A CN201110397250XA CN201110397250A CN102493431A CN 102493431 A CN102493431 A CN 102493431A CN 201110397250X A CN201110397250X A CN 201110397250XA CN 201110397250 A CN201110397250 A CN 201110397250A CN 102493431 A CN102493431 A CN 102493431A
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Abstract
The invention relates to a real time monitoring strengthening method preventing a pile foundation from descending, which comprises steps of 1 obtaining standard value of pressure stress in a pile foundation design stage; 2 embedding a pressure gage which is connected with a computer through a wire at the top of each pile foundation in advance; 3 embedding grout injection pipes on four faces of the lateral portion of each pile foundation; 4 starting the grout injection pipes embedded on the four faces of the lateral portion of the pile foundation occurring pressure value deviation when deviation occurs between a measured actual value and a standard value for slip casting, and 5 completing grout injection, leveling a pile body to be stressed in balance, and strengthening the pile foundation occurring the pressure value deviation. The real time monitoring strengthening method preventing the pile foundation from descending can timely monitor pile foundation states, strengthen the pile foundation at the first time, is simple and easy to conduct, effectively reduces strengthening time of the pile foundation, improves strengthening efficiency of the pile foundation, lowers construction cost, improves construction quality, and is safe and reliable.
Description
Technical field
The invention belongs to the pile foundation reinforcement field, especially a kind of real-time monitoring reinforcement means that prevents pile foundation settlement.
Background technology
Modern high-rise building generally adopts pile foundation construction, is generally castinplace pile and pile for prestressed pipe, but because the influence of soil property inhomogeneities in construction deviation, special soil property and the place; Often cause bearing capacity of pile foundation non-uniform phenomenon to occur, and because in the Pile Foundations Design stage, for simplified design is convenient to construction; Often the pile foundations parameter in the certain limit of place is set to unified standard, but when actual bearer, soil layer property between each stake; All there is bigger difference again in the top bearing capacity of pile foundation; Thereby the bearing capacity of single pile has a long way to go in the place, causes excessive differential settlement, influences the normal use of building structure.Do not regulate and control at present the inhomogeneous stressed job practices of single pile preferably; The general method of handling the pile foundation differential settlement is occurring adopting remedial measures behind the big differential settlement when the discovery structure often; Owing to do not control the development of the differential settlement that must occur timely in the design and construction stage; Thereby make that the remedial measure of differential settlement is complicated,, often also will waste a large amount of human and material resources, financial resources even if eliminated differential settlement of buildings.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; A kind of real-time monitoring reinforcement means that prevents pile foundation settlement is provided; This reinforcement means can monitor in real time that pile foundation state, the very first time are reinforced pile foundation, method is simple, has effectively shortened the pile foundation reinforcement time, has improved pile foundation reinforcement efficient; Reduce construction cost, improved construction quality.
The present invention solves its technical problem and realizes through following technical scheme:
A kind of real-time monitoring reinforcement means that prevents pile foundation settlement, the step that its method comprises is:
(1), should calculate the size of pile foundation top according to requirement for bearing capacity and place situation, draw standard value in different building height compressive stress in the Pile Foundations Design stage;
(2), in advance at the pre-buried pressure gauge of each pile foundation tip position, pressure gauge is connected with computer through lead;
(3), the pre-buried Grouting Pipe at pile foundation sidepiece four sides;
(4), the pressure gauge numerical value that on the real-time monitoring computer of structure construction different phase, occurs changes; When deviation 10%-15% appears in the measurement actual numerical value of a certain pile foundation position and standard value, start the Grouting Pipe that is embedded in the pile foundation sidepiece four sides that the force value deviation occurs and carry out slip casting;
(5), high pressure insufflation spray cement paste or chemical consolidation agent are adopted in slip casting; Make the pile foundation periphery soil fixation that the force value deviation occurs; Promote pile foundation unit's deflection supporting capacity value, accomplish leveling pile body force balance, realize reinforcing the pile foundation that the force value deviation occurs.
And described pressure is counted band pitch capsule pressure cell.
And described Grouting Pipe is withstand voltage hard plastic tube with holes.
Advantage of the present invention and beneficial effect are:
1, the real-time monitoring reinforcement means that originally prevents pile foundation settlement adopts in advance at the pre-buried pressure gauge of each pile foundation tip position; Pressure gauge is connected with computer through lead; Comparing with the pressure gauge numerical value of monitoring in real time through the design standard value draws the earliest time of reinforcing pile foundation, thereby accomplishes pile foundation reinforcement in the very first time, avoids the reinforcing of the formula of remedying again behind the pile foundation settlement; Time saving and energy saving, improved safety of construction.
2, prevent that originally the stress that the real-time monitoring reinforcement means of pile foundation settlement can realize pile body is controlled, processing method is controlled, and construction is simple, fast, and required construction equipment is few, and construction cost is low, comprehensive cost is low.
3, the present invention can monitor in real time that pile foundation state, the very first time are reinforced pile foundation, method is simple; Effectively shortened the pile foundation reinforcement time; Improved pile foundation reinforcement efficient; Having reduced construction cost, improved construction quality, is a kind of safe and reliable real-time monitoring reinforcement means that prevents pile foundation settlement.
Description of drawings
Fig. 1 for using when of the present invention pile foundation arrange vertical view;
Fig. 2 is pile foundation and Grouting Pipe position view when of the present invention for using.
The specific embodiment
Through specific embodiment the present invention is made further detailed description below, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
A kind of real-time monitoring reinforcement means that prevents pile foundation settlement, the step that its method comprises is:
(1), should calculate the size of pile foundation top based on requirement for bearing capacity and place situation in 2 design phases of pile foundation in different building height compression; Draw standard value, can draw the standard value of each pile for large complicated piling strtucture through the total volume modeling of finite element software;
(2), in advance at the pre-buried pressure gauge 3 of each pile foundation tip position, this pressure is counted band pitch capsule pressure cell, pressure gauge is connected with computer through lead;
(3), at pile foundation sidepiece four sides pre-buried Grouting Pipe 1, Grouting Pipe is withstand voltage hard plastic tube with holes;
(4), the pressure gauge numerical value that on the real-time monitoring computer of structure construction different phase, occurs changes; When deviation 10%-15% appears in the measurement actual numerical value of a certain pile foundation position and standard value, start the Grouting Pipe that is embedded in the pile foundation sidepiece four sides that the force value deviation occurs and carry out slip casting; Promptly along with the continuous construction of superstructure; Deadweight increases gradually; Monitor the pile body pressure condition in real time in the structure construction different phase; Carry out numerical analysis based on measuring numerical value and standard value; Draw the deviation of pile body actual forced status and design; Analyze in the place stressed uniformity between the different pile bodies, when the big deviation of the stressed appearance of certain some pile body, can start Grouting Pipe and carry out slip casting;
(5), high pressure insufflation spray cement paste or chemical consolidation agent are adopted in slip casting; Make the pile foundation periphery soil fixation that the force value deviation occurs; Promote pile foundation unit's deflection supporting capacity value, accomplish leveling pile body force balance, realize reinforcing the pile foundation that the force value deviation occurs; Constantly regulate the balance between the pile body stress in the construction period, can prevent effectively that building from producing differential settlement.
The present invention has just considered the inhomogeneous stressed existence of pile foundation and the generation of differential settlement fully in the design and construction stage, before the superstructure construction, on the stake top stress trajectory device, i.e. pressure gauge is set in advance; Pre-buried Grouting Pipe, during structure construction, the pressure state of real-time monitored control stake; When in case certain stake and design pressure occurring big gap being arranged; Just can confirm as the phenomenon that in this scope, has produced differential settlement, take the soil processing of grouting and reinforcing stake week this moment immediately, thereby improve native frictional behaviour of corresponding position stake week; Its single pile bearing capacity is improved; Thereby eliminate the differential settlement phenomenon here,, thereby can more effectively control differential settlement because this kind method is just differential settlement to be eliminated in the stage of minimum in the construction period.
Claims (3)
1. real-time monitoring reinforcement means that prevents pile foundation settlement, it is characterized in that: the step that this method comprises is:
(1), should calculate the size of pile foundation top according to requirement for bearing capacity and place situation, draw standard value in different building height compressive stress in the Pile Foundations Design stage;
(2), in advance at the pre-buried pressure gauge of each pile foundation tip position, pressure gauge is connected with computer through lead;
(3), the pre-buried Grouting Pipe at pile foundation sidepiece four sides;
(4), the pressure gauge numerical value that on the real-time monitoring computer of structure construction different phase, occurs changes; When deviation 10%-15% appears in the measurement actual numerical value of a certain pile foundation position and standard value, start the Grouting Pipe that is embedded in the pile foundation sidepiece four sides that the force value deviation occurs and carry out slip casting;
(5), high pressure insufflation spray cement paste or chemical consolidation agent are adopted in slip casting; Make the pile foundation periphery soil fixation that the force value deviation occurs; Promote pile foundation unit's deflection supporting capacity value, accomplish leveling pile body force balance, realize reinforcing the pile foundation that the force value deviation occurs.
2. the real-time monitoring reinforcement means that prevents pile foundation settlement according to claim 1 is characterized in that: described pressure is counted band pitch capsule pressure cell.
3. the real-time monitoring reinforcement means that prevents pile foundation settlement according to claim 1 is characterized in that: described Grouting Pipe is withstand voltage hard plastic tube with holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110397250.XA CN102493431B (en) | 2011-12-05 | 2011-12-05 | Real time monitoring strengthening method preventing pile foundation from descending |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110397250.XA CN102493431B (en) | 2011-12-05 | 2011-12-05 | Real time monitoring strengthening method preventing pile foundation from descending |
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| CN102493431A true CN102493431A (en) | 2012-06-13 |
| CN102493431B CN102493431B (en) | 2014-04-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114370071A (en) * | 2021-11-29 | 2022-04-19 | 北京恒祥宏业基础加固技术有限公司 | Device, system and method for monitoring controllable grouting reinforcement of existing building in real time |
| CN115198816A (en) * | 2022-08-17 | 2022-10-18 | 天津大学 | Pile foundation horizontal deformation compensation control method based on expansion of expansion unit |
| CN115341591A (en) * | 2022-08-17 | 2022-11-15 | 天津大学 | Pile foundation settlement overall process intelligent control method based on unit body expansion |
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| CN1065422A (en) * | 1991-03-30 | 1992-10-21 | 郑建光 | The real-time monitoring method for quality of cement mixing method |
| JPH0913418A (en) * | 1995-06-29 | 1997-01-14 | Nitto Techno Group:Kk | Building recovery method by compaction grouting |
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| CN101691764A (en) * | 2009-10-26 | 2010-04-07 | 西南交通大学 | On-site monitoring and evaluation method for settlement of pile foundations |
| CN101929334A (en) * | 2009-06-25 | 2010-12-29 | 中国石油大学(北京) | Device and method for monitoring penetration of marine petroleum pipe and pile hammering-in method |
| CN101994323A (en) * | 2009-08-18 | 2011-03-30 | 天津市隆安达建筑仪器科技发展有限公司 | Equipment for monitoring safety of pile foundation and displaying and recording data in constructing process of static pile machine |
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2011
- 2011-12-05 CN CN201110397250.XA patent/CN102493431B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1065422A (en) * | 1991-03-30 | 1992-10-21 | 郑建光 | The real-time monitoring method for quality of cement mixing method |
| JPH0913418A (en) * | 1995-06-29 | 1997-01-14 | Nitto Techno Group:Kk | Building recovery method by compaction grouting |
| JPH108487A (en) * | 1996-06-27 | 1998-01-13 | Mitsubishi Heavy Ind Ltd | Repairing method and device for underground structure |
| CN1346000A (en) * | 2000-09-27 | 2002-04-24 | 曾昭礼 | High-pressure side-spraying reinforcing method for defect in foundation pile |
| CN101040180A (en) * | 2004-07-23 | 2007-09-19 | 美商智慧结构股份有限公司 | Monitoring system for concrete pilings and method of installation |
| CN101929334A (en) * | 2009-06-25 | 2010-12-29 | 中国石油大学(北京) | Device and method for monitoring penetration of marine petroleum pipe and pile hammering-in method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114370071A (en) * | 2021-11-29 | 2022-04-19 | 北京恒祥宏业基础加固技术有限公司 | Device, system and method for monitoring controllable grouting reinforcement of existing building in real time |
| CN115198816A (en) * | 2022-08-17 | 2022-10-18 | 天津大学 | Pile foundation horizontal deformation compensation control method based on expansion of expansion unit |
| CN115341591A (en) * | 2022-08-17 | 2022-11-15 | 天津大学 | Pile foundation settlement overall process intelligent control method based on unit body expansion |
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| CN102493431B (en) | 2014-04-09 |
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