CN105155500A - Rotation type static sounding detecting method for cement mixing pile - Google Patents
Rotation type static sounding detecting method for cement mixing pile Download PDFInfo
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- CN105155500A CN105155500A CN201510479611.3A CN201510479611A CN105155500A CN 105155500 A CN105155500 A CN 105155500A CN 201510479611 A CN201510479611 A CN 201510479611A CN 105155500 A CN105155500 A CN 105155500A
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Abstract
The invention discloses a rotation type static sounding detecting method for a cement mixing pile. A static sounding instrument is used for enabling a sounding probe to penetrate into a pile body, and the quality of the pile body is evaluated indirectly according to the penetration-in resistance; and when the sounding probe penetrates into the pile body, the direction of the sounding probe is mended in a manner of rotating the sounding probe. The rotation type static sounding detecting method is adopted for replacing an existing core sample drilling method in cement mixing pile detection, the probe is not prone to skewing out of the pile, the detected point positioning accuracy is high, and the requirement for detection accuracy during delivery-receiving acceptance is met.
Description
Technical field
The present invention relates to a kind of cement mixing pile rotary type static sounding detection method, be specifically related to carry out static penetrometer testing by rotation mode, improve the verticality of static sounding, reduce the method for probe departure degree.
Background technology
Cement mixing pile composite foundation is widely used in highway, railway, port and pier and the Reinforcement for soft soil foundation such as industry and civilian construction.The detection of construction quality of cement mixing pile is the important Quality Control Links of the program.Bore extracting core process is the main detection method that " Of Road Engineering Quality Checking And Evaluation standard " limits, and is directly observed and test continuity, uniformity and the intensity of determining pile body by core boring sampling, obtains the quality information of pile body total length." building foundation engineering construction quality standards of acceptance " (GB50202-2002) is to Composite Foundation of Soil cement Mixing Piles, high pressure jet grouting pile composite foundation, sand pile ground, vibrosinking pile composite foundation, soil and lime-soil compaction pile composite foundation, CFG Compound Foundation and composite foundation with rammed soil-cement pile, its bearing capacity examination, quantity is 0.5% ~ 1% of sum, but should not be less than 3 places.When having the requirement of single pile ruggedness test, quantity is 0.5% ~ 1% of sum, but should not be less than 3.Because the processing soft soil place of roadbed is large, stake number is many, get core frequency detecting according to code requirement, there is the shortcoming that workload is large, efficiency is low, long in time limit and cost is high.
Conventional Using Cone Penetration Test be utilize static(al) with a constant injection speed by circular cone probe by a series of feeler lever injection soil body, Indirect evaluation soil body quality is carried out according to penetration resistance, simple to operate, cost is low, efficiency is higher, can reflect the Strength Changes of the soil body continuously.Static sounding specific penetration resistance and core 90d unconfined compression strength and there is empirical relation between the length of time.But when adopting conventional Using Cone Penetration Test to test non-uniform dielectric, its probe injection track affects by the uniformity coefficient of medium, pops one's head in and easily offsets out stake, can not complete detection pile quality, cause the erroneous judgement of broken pile sometimes; And measuring point positioning precision is low, be difficult to ensure so be detected as power.Develop a kind of probe and not easily offset out stake, cone penetration method that measuring point positioning precision is high, meet the requirement of delivery receiving acceptance to accuracy of detection, replace cement mixing pile detect in existing core sampling drilling, become technical problem urgently to be resolved hurrily.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides one and not easily offsets out stake, measuring point positioning precision height cement mixing pile rotary type static sounding detection method.
Technical scheme: for solving the problems of the technologies described above, cement mixing pile rotary type static sounding detection method provided by the invention, static penetrometer is used to be popped one's head in by feeler inspection injection pile body, carry out Indirect evaluation pile quality according to penetration resistance, by direction that the mode correction feeler inspection of rotary penetration sounding probe is popped one's head in during injection.
As preferably, improve feeler inspection probe pile penetration by different rotary speeies during injection, reduce penetration resistance, improve feeler inspection probe test speed.
As preferably, based on existing static cone penetration equipment and feeler inspection principle, under the rotational speed condition determined, according to feeler inspection sound end resistance, collateral resistance and penetration resistance and soil body mechanical characteristic relation, calculate testing result.
As preferably, under unit depth of penetration condition, adjusting its offset direction by rotating feeler inspection head angle, reducing side-play amount, the overall verticality thus adjustment feeler inspection is popped one's head in.
Beneficial effect: cement mixing pile rotary type static sounding detection method of the present invention, on static sounding basis, feeler inspection probe orientation is changed by rotation mode, reach and improve feeler inspection probe vertical degree, reduce and occur that probe offset goes out stake, cause the possibility of the erroneous judgement of broken pile, further increase effect that static penetrometer detects.
On static sounding basis, improve feeler inspection probe pile penetration by different rotary speeies, reduce penetration resistance, and then improve feeler inspection probe test speed.
On the basis of static cone penetration equipment, feeler inspection principle, under the rotational speed condition determined, according to feeler inspection sound end resistance, collateral resistance and penetration resistance and soil body mechanical characteristic relation, and then reach testing goal.
Cement mixing pile rotary type static sounding detection method is by adjusting probe offset direction by rotational angle under unit depth of penetration condition, reduces probe offset amount, thus the overall verticality of adjustment probe.
Except technical problem, the technical characteristic forming technical scheme and the advantage brought by the technical characteristic of these technical schemes that the present invention recited above solves, the advantage that the other technologies feature comprised in the other technologies problem that cement mixing pile rotary type static sounding detection method of the present invention can solve, technical scheme and these technical characteristics bring, will be described in more detail by reference to the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is that unit length of popping one's head in example of the present invention places an order shift analysis under times rotational angle;
Fig. 2 is shift analysis under double rotational angle of popping one's head in example of the present invention under unit length.
Detailed description of the invention
Embodiment:
When cement mixing pile body being tested with static sounding, for the cement mixing pile of general stake diameter 0.5m, at pile body 4m depth, static(al) probe tiltedly goes out pile body, so supposition feeler inspection probe vertical degree can be similar to control about 6.25%, as shown in Figure 1, depart from along A1-A2 line during conventional static penetrometer test, deviation oscillation δ=4*6.25%=0.25m, i.e. half footpath.If employing the present invention, half length that often declines turns 180 °, then deviation oscillation is reduced to: δ=4*(6.25%/2)=0.125m.
As shown in Figure 2,1/4 length that often declines turns 180 °, then deviation oscillation is reduced to: δ=4*2/2* (6.25%/2)=0.125m; Illustrate that to adopt this bright when running into heterogeneous material when static sounding is tested, the verticality that can double.
Visible, cement mixing pile rotary type static sounding detection method of the present invention not only can reduce uneven resistance, reduces the axial force of feeler lever, reduces flexibility; Also can improve feeler inspection probe can pile penetration, and then reduces the loss of probe, reduces and occurs that probe offset goes out stake, cause the possibility of the erroneous judgement of broken pile.
Claims (4)
1. a cement mixing pile rotary type static sounding detection method, it is characterized in that: use static penetrometer to be popped one's head in by feeler inspection injection pile body, carry out Indirect evaluation pile quality according to penetration resistance, by direction that the mode correction feeler inspection of rotary penetration sounding probe is popped one's head in during injection.
2. cement mixing pile rotary type static sounding detection method according to claim 1, is characterized in that: improve feeler inspection probe pile penetration by different rotary speeies during injection, reduce penetration resistance, improves feeler inspection probe test speed.
3. cement mixing pile rotary type static sounding detection method according to claim 1, it is characterized in that: based on existing static cone penetration equipment and feeler inspection principle, under the rotational speed condition determined, according to feeler inspection sound end resistance, collateral resistance and penetration resistance and soil body mechanical characteristic relation, calculate testing result.
4. cement mixing pile rotary type static sounding detection method according to claim 1, it is characterized in that: under unit depth of penetration condition, adjust its offset direction by rotating feeler inspection head angle, reduce side-play amount, the overall verticality thus adjustment feeler inspection is popped one's head in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510479611.3A CN105155500A (en) | 2015-08-03 | 2015-08-03 | Rotation type static sounding detecting method for cement mixing pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510479611.3A CN105155500A (en) | 2015-08-03 | 2015-08-03 | Rotation type static sounding detecting method for cement mixing pile |
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| CN105155500A true CN105155500A (en) | 2015-12-16 |
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| CN201510479611.3A Pending CN105155500A (en) | 2015-08-03 | 2015-08-03 | Rotation type static sounding detecting method for cement mixing pile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579351A (en) * | 2020-04-07 | 2020-08-25 | 中山大学 | Method for evaluating grouting support effect of tunnel and underground engineering |
| CN115726406A (en) * | 2022-12-08 | 2023-03-03 | 上海勘察设计研究院(集团)有限公司 | Pile length detection comprehensive evaluation method for existing construction engineering pile |
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| JP2003129462A (en) * | 2001-10-25 | 2003-05-08 | Toa Harbor Works Co Ltd | Method for evaluating coefficient of earth pressure at rest of ground into which pile or sand compaction pile is driven, and method for evaluating coefficient of earth pressure at rest of sand compaction pile itself in ground into which sand compaction pile is driven |
| KR100426250B1 (en) * | 2003-11-03 | 2004-04-08 | (주)초석건설 | The test equipment of static loading on a pile and its method, using the sand compaction pile ship on the marine |
| CN101705678A (en) * | 2009-11-04 | 2010-05-12 | 广东永基建筑基础有限公司 | Cone penetration method |
| CN103088804A (en) * | 2013-02-07 | 2013-05-08 | 上海岩土工程勘察设计研究院有限公司 | Injection method for static sounding probe rod |
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Patent Citations (4)
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| JP2003129462A (en) * | 2001-10-25 | 2003-05-08 | Toa Harbor Works Co Ltd | Method for evaluating coefficient of earth pressure at rest of ground into which pile or sand compaction pile is driven, and method for evaluating coefficient of earth pressure at rest of sand compaction pile itself in ground into which sand compaction pile is driven |
| KR100426250B1 (en) * | 2003-11-03 | 2004-04-08 | (주)초석건설 | The test equipment of static loading on a pile and its method, using the sand compaction pile ship on the marine |
| CN101705678A (en) * | 2009-11-04 | 2010-05-12 | 广东永基建筑基础有限公司 | Cone penetration method |
| CN103088804A (en) * | 2013-02-07 | 2013-05-08 | 上海岩土工程勘察设计研究院有限公司 | Injection method for static sounding probe rod |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579351A (en) * | 2020-04-07 | 2020-08-25 | 中山大学 | Method for evaluating grouting support effect of tunnel and underground engineering |
| CN111579351B (en) * | 2020-04-07 | 2021-09-17 | 中山大学 | Method for evaluating grouting support effect of tunnel and underground engineering |
| CN115726406A (en) * | 2022-12-08 | 2023-03-03 | 上海勘察设计研究院(集团)有限公司 | Pile length detection comprehensive evaluation method for existing construction engineering pile |
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Application publication date: 20151216 |