CN103711152B - X-type Model Pile loads monitoring device and monitoring method - Google Patents

X-type Model Pile loads monitoring device and monitoring method Download PDF

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Publication number
CN103711152B
CN103711152B CN201310689235.1A CN201310689235A CN103711152B CN 103711152 B CN103711152 B CN 103711152B CN 201310689235 A CN201310689235 A CN 201310689235A CN 103711152 B CN103711152 B CN 103711152B
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type model
model pile
soil
pile
monitoring
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CN103711152A (en
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高磊
刘汉龙
陈晖东
余湘娟
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Hohai University HHU
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Hohai University HHU
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Abstract

The invention discloses a kind of X-type Model Pile and load monitoring device and monitoring method, this device comprises and holds soil container, charger and monitoring device.The method the X-type Model Pile of pre-buried good sensor fibre is embedded in the soil body of appearance soil container, again charger is connected by channel-section steel with appearance soil container, vertical load is applied to X-type Model Pile, by the monitoring device monitoring ess-strain situation of X-type Model Pile in loading procedure, to simulating the effect of oil and pile under pressure and the bearing capacity of stake and deformation.The present invention can the loading environment of accurate Control experiment, the stress deformation situation of monitoring X-type Model Pile in soil, and improves a shape and size targetedly according to result of the test, more meets engineering practice requirement.And device simple installation, be easy to control, can be recycled, little on pile body impact.

Description

X-type Model Pile loads monitoring device and monitoring method
Technical field
The present invention relates to a kind of experimental rig and test method of foundation structure, be specifically related to a kind of X-type Model Pile and load monitoring device and monitoring method.
Background technology
In Practical Project, costly, and monitoring test is due to place and condition restriction, is difficult to control parameters in process of the test for on-the-spot pile measurement, nor convenient.Engineering pile foundation test loading needs design arrangement counterforce device, and because added load is comparatively large, counterforce device requires higher, in-site installation time and effort consuming.Traditional stress strain gauge adopts electromagnetic type or vibrating string type sensor, installation procedure many and at the scene time survival rate low, and be point sensor, only can monitor the ess-strain situation of pile foundation appointed part, because engineering geological condition is complicated, probably produce leak source when analyzing interaction or the pile body stressing conditions of oil and pile, if need comparatively comprehensively to analyze the characteristic of stake in soil, then to arrange more sensor, and the wire that sensor extracts is too much, can pile quality be affected, and can be pretty troublesome in practice of construction process.Therefore adopt a kind of easy full distributed monitoring means particularly important to the stress deformation situation analyzing stake, need to design a kind of apparatus and method that accurately can add load and the strain of full distributed monitoring pile body stress in indoor to X-type Model Pile.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of X-type Model Pile and loads monitoring device and monitoring method.
Technical scheme: for solving the problems of the technologies described above, X-type Model Pile provided by the invention loads monitoring device and comprises:
Hold soil container, there is vertical sidewall and open top, be wherein filled with soil, in soil, be embedded with X-type Model Pile, described sidewall is connected with column;
Charger, comprises the counter-force cover plate be fixedly connected with column, is provided with jack, load sensor, force-transmitting pole and pad successively from top to bottom between described counter-force cover plate and described X-type Model Pile;
Monitoring device, comprises the sensor fibre installed along X-type Model Pile, is connected to the fiber data Acquisition Instrument of sensor fibre, and by load display that cable is connected with load sensor.
As preferably, described channel-section steel is holding the sidewall external symmetry distribution of soil container.
As preferably, described appearance soil container is rectangle, and described sidewall welds with channel-section steel.
As preferably, described counter-force cover plate welds with channel-section steel, described sidewall and channel-section steel hinged.
During use, the monitoring method of above-mentioned loading monitoring device comprises the following steps:
1) X-type Model Pile is made, according to the X-type concrete pile scaled down that on-the-spot full size is very little;
2) X-type Model Pile surface fluting, be distributed in groove by stretching for sensor fibre, with epoxy resin by groove fill, floating;
3) appearance soil container, charger and monitoring device is arranged;
4) reading of foundation load sensor accurately controls the loading environment of jack, utilizes fiber data Acquisition Instrument to monitor the stress deformation situation of X-type Model Pile in soil continuously.
Beneficial effect: the present invention adopts the apparatus and method of model testing, the load of the loading ratio situ loading loaded is little, adopt jack as charger, the size of load is accurately determined with load sensor, X-type Model Pile is being applied in the process of vertical load, by the monitoring device monitoring ess-strain situation of X-type Model Pile in loading procedure, to simulating the effect of oil and pile under pressure and the bearing capacity of stake and deformation.The present invention can the loading environment of accurate Control experiment, the stress deformation situation of monitoring X-type Model Pile in soil, and improves a shape and size targetedly according to result of the test, more meets engineering practice requirement.Apparatus of the present invention simple installation, be easy to control, the advantage such as can be recycled, and the distributed sensing fiber used is little on pile body impact.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the sectional drawing of X-type Model Pile in Fig. 1.
Detailed description of the invention
Embodiment: the X-type Model Pile of the present embodiment loads monitoring device as depicted in figs. 1 and 2, comprise the appearance soil container 9 that there is upright side walls and top and open, wherein be filled with soil 12, X-type Model Pile 8 is embedded with in soil 12, the sidewall external symmetry holding soil container 9 is distributed with four channel-section steels 13, hold soil container 9 to be fixedly connected with channel-section steel 13, welding or hinged mode can be adopted.
Charger comprises the counter-force cover plate 3 welded with channel-section steel 13, is provided with jack 4, load sensor 5, force-transmitting pole 6 and pad 7 from top to bottom successively between counter-force cover plate 3 and X-type Model Pile 8.
The fiber data Acquisition Instrument 1 that monitoring device comprises sensor fibre 10 and connects, the load sensor 5 connected successively, cable 11 and load display 2.
As shown in Figure 3, along X-type Model Pile 8, sensor fibre 10 is installed.
During use, the X-type Model Pile of the present embodiment loads monitoring method and comprises the following steps:
1, according to the principle of similitude, the X-type concrete pile scaled down very little by on-the-spot full size, the X-type Model Pile be prefabricated into.
2, the dark groove of a 5mm is opened on prefabricated X-type Model Pile surface, clean by removing in groove with small brushes and hair-dryer etc., first stretching sensor fibre is fixed in groove with Instant cement, then encapsulates with epoxy resin, with hair-dryer epoxy resin dried up or etc. its natural air drying.
3, the soil layer first laying certain thickness in soil container is being held, again pre-buried good X-type Model Pile is put into and hold soil container, then the soil of layered arrangement needs in soil container is being held to the position of specifying, pad, force-transmitting pole, load sensor etc. are superposed successively and is placed on stake top, with the first precompressed of jack, make each member in tight contact, check that adjusting the load that jack can be applied just in time can be delivered on stake top simultaneously.
Wherein hold soil container and be of a size of 1.5m*1m*1m, be welded by four block plates.Counter-force cover plate is made by the steel plate of one piece of 3cm*100cm*100cm, and jack high-strength bolt is fixed on counter-force cover plate.The length of force-transmitting pole and intensity can be determined apart from the distance of jack and the maximum load of test requirements document applying according to X-type Model Pile top.The size of pad is determined according to the size of X-type Model Pile, is as the criterion can cover X-type Model Pile pile crown.
4, load sensor is connected load display, by sensor fibre connecting fiber data collecting instrument, debug each term coefficient, see loading and monitoring system whether normal, if abnormal, then to check each parts connect whether have problem, and whether sensor fibre ruptures, repair, if normal, can test.
5, the reading of foundation load sensor accurately controls the loading environment of jack, utilizes fiber data Acquisition Instrument to monitor the stress deformation situation of X-type Model Pile in soil continuously, and improves a shape and size targetedly according to result of the test.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on manual, must determine its technical scope according to right.

Claims (1)

1. X-type Model Pile loads a monitoring method, it is characterized in that comprising the following steps:
1) X-type Model Pile is made, according to the X-type concrete pile scaled down that on-the-spot full size is very little;
2) X-type Model Pile surface fluting, be distributed in groove by stretching for sensor fibre, with epoxy resin by groove fill, floating;
3) appearance soil container, charger and monitoring device is arranged:
Wherein holding soil container is the open top receptacle with upright side walls, wherein be filled with soil, X-type Model Pile is embedded with in soil, described sidewall is connected with column, described column is made up of four channel-section steels, described channel-section steel distributes in the sidewall external symmetry of container, and described appearance soil container is rectangle, and described sidewall welds with channel-section steel;
Charger comprises the counter-force cover plate be fixedly connected with column, from top to bottom jack, load sensor, force-transmitting pole and pad are installed successively between described counter-force cover plate and described X-type Model Pile, described counter-force cover plate welds with channel-section steel, described sidewall and channel-section steel hinged;
Monitoring device comprises the sensor fibre installed along X-type Model Pile, is connected to the fiber data Acquisition Instrument of sensor fibre, and by load display that cable is connected with load sensor;
4) reading of foundation load sensor accurately controls the loading environment of jack, utilizes fiber data Acquisition Instrument to monitor the stress deformation situation of X-type Model Pile in soil continuously.
CN201310689235.1A 2013-12-17 2013-12-17 X-type Model Pile loads monitoring device and monitoring method Active CN103711152B (en)

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104099954B (en) * 2014-07-11 2016-01-13 郑州大学 The horizontal vertical loading device of pile foundation model testing
CN104594394B (en) * 2014-11-28 2017-07-14 长安大学 A kind of Model Pile piling method
CN107012895A (en) * 2016-01-27 2017-08-04 化建新 A kind of CFG pile composite foundations bearing capacity characteristics and deformation analysis method
CN109238606A (en) * 2018-10-19 2019-01-18 佛山科学技术学院 A kind of loading detection device and its measuring method suitable for bridge main beam
CN109813472B (en) * 2019-03-14 2023-11-24 衡通华创(北京)科技有限公司 Embedded load sensor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011117172A (en) * 2009-12-02 2011-06-16 Shimizu Corp Method for checking end bearing capacity of cast-in-place pile
CN102607754A (en) * 2012-03-16 2012-07-25 东南大学 Device for measuring negative skin friction of pile soil
CN202610847U (en) * 2012-03-16 2012-12-19 东南大学 Measuring device of pile soil negative friction
CN102877492A (en) * 2012-10-31 2013-01-16 东南大学 Negative frictional resistance pile soil displacement measuring device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011117172A (en) * 2009-12-02 2011-06-16 Shimizu Corp Method for checking end bearing capacity of cast-in-place pile
CN102607754A (en) * 2012-03-16 2012-07-25 东南大学 Device for measuring negative skin friction of pile soil
CN202610847U (en) * 2012-03-16 2012-12-19 东南大学 Measuring device of pile soil negative friction
CN102877492A (en) * 2012-10-31 2013-01-16 东南大学 Negative frictional resistance pile soil displacement measuring device

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