CN1690317A - Method for measuring pipe pile swing resulted from foundation ditch digging - Google Patents
Method for measuring pipe pile swing resulted from foundation ditch digging Download PDFInfo
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- CN1690317A CN1690317A CN 200410018065 CN200410018065A CN1690317A CN 1690317 A CN1690317 A CN 1690317A CN 200410018065 CN200410018065 CN 200410018065 CN 200410018065 A CN200410018065 A CN 200410018065A CN 1690317 A CN1690317 A CN 1690317A
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Abstract
The invention relates to the investigation technology of civil engineering, in particular the measurement of the side shift of post resulted from excavating basic hole. Said method comprises following steps: (1) selecting posts which are need detected before excavating the basic hole, and clear the soil core in the post; (2) inserting the gradient pipe into the hole of post; (3) filling the filling material between the gradient pipe and the hole of post to make the gradient pipe side shift and distort simultaneously with the post; (4) measuring the initial position of gradient pipe in different depth before the distortion of post resulted from excavating the basic hole, and the measured value is initial value; (5) measuring the altered position of gradient pipe in different depth momentarily after excavating the basic hole, and the measured value is the altered value; (6) subtracting the initial value from the altered value to attain the side shifting value of post.
Description
(1) technical field
The present invention relates to the prospecting technique in the geotechnical engineering, relate in particular to the method for measurement that excavation of foundation pit causes the pile tube sidesway.
(2) background technology
Usually take the working procedure of piling back excavation pit earlier in the construction of important industry and civilian construction, will cause the pile tube sidesway as engineering foundation behind the excavation of foundation pit, present pile tube generally adopts concrete tubular pile.Be the variation with the degree of depth of the sidesway that measures concrete tubular pile, existing method for measurement has: (1) is adopted gyroscope to move along the pile tube inner hole wall and is measured the variation of the sidesway of pile tube with the degree of depth.This method expense is higher, is not easy to duplicate detection again, also influences accuracy because of the out-of-flatness of concrete tubular pile inwall.(2) in advance in the pile tube wall both sides bury the strain testing sensor underground, measure the numerical value of two lateral strains of pile tube, the counter again variation of releasing the sidesway of pile tube with the degree of depth at different depth.This method expense is higher, and the preparatory period is long, and is in and makes the impaired accuracy that influences of strain testing sensor in the underground wet environment because of system stake, piling and long period.
In important Excavation Process, for sidesway by provisional foundation pit enclosure structures such as detection diaphragm wall, cast-in-place concrete pile, cement mixing methods, safety to foundation ditch is monitored, usually take before concrete or cement-soil solidify, the deviational survey pipe to be inserted in the pit maintenance soil structure, solidify back deviational survey pipe and the synchronous side-move distortion of space enclosing structure; Before excavation, measure the initial position of deviational survey pipe, measure the changing position of deviational survey pipe behind the excavation of foundation pit, deduct the sidesway value that initial position just can draw stake with changing position at different depth at different depth.This method can be used as the method that measures provisional pit maintenance soil structure lateral displacement of construction stage.
(3) summary of the invention
The object of the present invention is to provide a kind of method that excavation of foundation pit causes the pile tube sidesway that measures.This method for measurement adopts the mode of inserting deviational survey pipe and packing material in pile tube, and easy to operate, accuracy is higher, and expense is few, and can use repeatedly, satisfies foundation pit construction monitoring requirement.
The present invention follows these steps to realize:
(1) pile tube that selection need be monitored before excavation of foundation pit, core in the cleaning hole of post;
(2) the deviational survey pipe is inserted in the hole of post;
(3) between deviational survey pipe and hole of post, pour into packing material, make the deviational survey pipe with the synchronous side-move distortion of pile tube;
(4) measure the initial position of deviational survey pipe at different depth earlier before pile tube is subjected to excavation of foundation pit disturbance distortion, the value that records is an initial value;
(5) measure the changing position of deviational survey pipe at different depth at any time behind excavation of foundation pit, the value that records is the change value;
(6) the change value is deducted initial value and be pile tube sidesway value.
Above-mentioned measurement excavation of foundation pit causes the method for pile tube sidesway, and the length of inserting the deviational survey pipe in the described hole of post is greater than the twice cutting depth, less than four times of cutting depths.
Above-mentioned measurement excavation of foundation pit causes the method for pile tube sidesway, and described packing material is the flowing material that solidifies in granular material or later stage; Packing material may be selected to be yellow ground, gypsum etc.
The present invention adopts to insert the deviational survey pipe in hole of post, and pours into packing material between deviational survey pipe and hole of post, and the stiffness effect of the rigidity reply pile tube of packing material is less, and can retrain the deviational survey pipe and make it with the synchronous side-move distortion of concrete tubular pile.Before pile tube is subjected to excavation of foundation pit disturbance distortion, measure the initial position of deviational survey pipe then respectively earlier, behind excavation of foundation pit, measure the changing position of deviational survey pipe at any time, the changing position value is deducted initial position value be pile tube sidesway value at different depth at different depth.The sidesway of deviational survey pipe detects and is finished by the deviational survey device, the deviational survey device is made up of deviational survey pipe, inclinometer, digital plate reading three parts, during measurement inclinometer inserted the deviational survey pipe, and be reflected on the plate reading by the horizontal sidesway value of lead with the deviational survey pipe, inclinometer can measure the variable quantity at inclination angle between deviational survey tubular axis line and the plumb line, and then calculate the sidesway of deviational survey pipe different depth, and show by digital plate reading.The method that this measurement excavation of foundation pit causes the pile tube sidesway is easy to operate, and accuracy is higher, and expense is few, and can use repeatedly, can satisfy foundation pit construction monitoring requirement.
(4) description of drawings
Provide embodiments of the invention below in conjunction with accompanying drawing.
Fig. 1 is for measuring the method structural representation of pile tube sidesway;
Fig. 2 is that the A-A of Fig. 1 is to sectional view.
Among the figure: 1 deviational survey pipe, 2 concrete tubular piles, 3 packing materials.
(5) specific embodiment
Referring to Fig. 1, Fig. 2, before the deep pit digging of the wide and heavy plate mill of certain steel mill and continuous casting, near excavation slope, select some concrete tubular piles 2, because the excavation of foundation ditch highly be underground-12 meters, pile tube 2 interior core height are about underground-40～-50 meters.In hole of post, insert deviational survey pipe 1 to the core top,, between deviational survey pipe 1 and pile tube 2 holes, pour into packing material 3 for making deviational survey pipe 1 and concrete tubular pile 2 synchronous side-move distortions and less to the stiffness effect of pile tube 2.After comparing materials such as concrete, gypsum and yellow ground, packing material 3 is selected yellow ground.Measure earlier the initial position of deviational survey pipe 1 different depth before excavation of foundation pit, can measure the changing position of deviational survey pipe 1 different depth then at any time, deducting the difference that initial position obtains with changing position is exactly the sidesway value of pile tube 2.The about 300mm of the maximum sidesway of actual measurement deviational survey pipe, certainty of measurement reaches 1mm, can measure 2 to 3 times in one day in case of necessity, satisfies the requirement of monitoring concrete tubular pile 2 sidesways in the foundation pit construction.
Claims (4)
1. one kind measures the method that excavation of foundation pit causes the pile tube sidesway, it is characterized in that following these steps to carrying out:
(1) pile tube that selection need be monitored before excavation of foundation pit, core in the cleaning hole of post;
(2) the deviational survey pipe is inserted in the hole of post;
(3) between deviational survey pipe and hole of post, pour into packing material, make the deviational survey pipe with the synchronous side-move distortion of pile tube;
(4) measure the initial position of deviational survey pipe at different depth earlier before pile tube is subjected to excavation of foundation pit disturbance distortion, the value that records is an initial value;
(5) measure the changing position of deviational survey pipe at different depth at any time behind excavation of foundation pit, the value that records is the change value;
(6) the change value is deducted initial value and be pile tube sidesway value.
2. measurement excavation of foundation pit according to claim 1 causes the method for pile tube sidesway, it is characterized in that the length of insertion deviational survey pipe in the hole of post is greater than the twice cutting depth, less than four times of cutting depths.
3. measurement excavation of foundation pit according to claim 1 and 2 causes the method for pile tube sidesway, it is characterized in that packing material is the flowing material that solidifies in granular material or later stage.
4. measurement excavation of foundation pit according to claim 3 causes the method for pile tube sidesway, it is characterized in that packing material is sand, gypsum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410018065 CN1690317A (en) | 2004-04-29 | 2004-04-29 | Method for measuring pipe pile swing resulted from foundation ditch digging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410018065 CN1690317A (en) | 2004-04-29 | 2004-04-29 | Method for measuring pipe pile swing resulted from foundation ditch digging |
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| Publication Number | Publication Date |
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| CN1690317A true CN1690317A (en) | 2005-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410018065 Pending CN1690317A (en) | 2004-04-29 | 2004-04-29 | Method for measuring pipe pile swing resulted from foundation ditch digging |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906787A (en) * | 2010-08-13 | 2010-12-08 | 上海交通大学 | Construction and processing method of great deep vertical inclinometer pipe in stratum containing gravels |
| CN101575861B (en) * | 2009-06-01 | 2011-05-25 | 上海市第二市政工程有限公司 | Method for monitoring the settlement by using inclinometer tube |
| CN103046523A (en) * | 2012-12-25 | 2013-04-17 | 北京爱地地质勘察基础工程公司 | Method for monitoring horizontal deformation of foundation pit and slope support |
| CN106245656A (en) * | 2016-08-02 | 2016-12-21 | 东北大学 | A kind of construction method of the supporting improving sidesway for master and slave type foundation ditch group |
| CN106592654A (en) * | 2016-12-28 | 2017-04-26 | 张继红 | Monitoring method for perpendicularity of steel pipe pile |
| CN110805074A (en) * | 2019-09-26 | 2020-02-18 | 国家电网有限公司 | Method for calculating dip angle of any section of tubular pile based on horizontal dip measurement |
| CN111778964A (en) * | 2020-07-24 | 2020-10-16 | 中国建筑第八工程局有限公司 | Foundation pit hollow support pile, construction method thereof and foundation pit support structure |
| CN112281932A (en) * | 2020-09-21 | 2021-01-29 | 中煤江南建设发展集团有限公司 | Data monitoring equipment and method for foundation pit support piles |
-
2004
- 2004-04-29 CN CN 200410018065 patent/CN1690317A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101575861B (en) * | 2009-06-01 | 2011-05-25 | 上海市第二市政工程有限公司 | Method for monitoring the settlement by using inclinometer tube |
| CN101906787A (en) * | 2010-08-13 | 2010-12-08 | 上海交通大学 | Construction and processing method of great deep vertical inclinometer pipe in stratum containing gravels |
| CN101906787B (en) * | 2010-08-13 | 2011-11-16 | 上海交通大学 | Construction and processing method of great deep vertical inclinometer pipe in stratum containing gravels |
| CN103046523A (en) * | 2012-12-25 | 2013-04-17 | 北京爱地地质勘察基础工程公司 | Method for monitoring horizontal deformation of foundation pit and slope support |
| CN103046523B (en) * | 2012-12-25 | 2014-09-24 | 北京爱地地质勘察基础工程公司 | Method for monitoring horizontal deformation of foundation pit and slope support |
| CN106245656A (en) * | 2016-08-02 | 2016-12-21 | 东北大学 | A kind of construction method of the supporting improving sidesway for master and slave type foundation ditch group |
| CN106592654A (en) * | 2016-12-28 | 2017-04-26 | 张继红 | Monitoring method for perpendicularity of steel pipe pile |
| CN110805074A (en) * | 2019-09-26 | 2020-02-18 | 国家电网有限公司 | Method for calculating dip angle of any section of tubular pile based on horizontal dip measurement |
| CN110805074B (en) * | 2019-09-26 | 2021-07-20 | 国家电网有限公司 | Method for calculating dip angle of any section of tubular pile based on horizontal dip measurement |
| CN111778964A (en) * | 2020-07-24 | 2020-10-16 | 中国建筑第八工程局有限公司 | Foundation pit hollow support pile, construction method thereof and foundation pit support structure |
| CN111778964B (en) * | 2020-07-24 | 2022-04-12 | 中国建筑第八工程局有限公司 | Foundation pit hollow support pile, construction method thereof and foundation pit support structure |
| CN112281932A (en) * | 2020-09-21 | 2021-01-29 | 中煤江南建设发展集团有限公司 | Data monitoring equipment and method for foundation pit support piles |
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