CN1831511A - Deep horizontal load testing method - Google Patents
Deep horizontal load testing method Download PDFInfo
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- CN1831511A CN1831511A CN 200610025494 CN200610025494A CN1831511A CN 1831511 A CN1831511 A CN 1831511A CN 200610025494 CN200610025494 CN 200610025494 CN 200610025494 A CN200610025494 A CN 200610025494A CN 1831511 A CN1831511 A CN 1831511A
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Abstract
A method for testing horizontal load of deep layer includes applying the reducing for forming hole to directly switch to test point of soil layer, using hydraulic driving to pressurize stage by stage for making load plate move horizontally, collecting deformation value at pressure of various stage in real time by data collection system, measuring horizontal deformation value of soil layer at different pressure to truly reflect stress character of soil layer at site condition when soil layer is basically under original stress state.
Description
Technical field
The present invention relates to experiment with measuring method class, relate to a kind of deep horizontal load testing method concretely.
Background technology
Horizontal load test method of the prior art can only be applicable to the superficial part soil layer, and only be suitable on the underground water table, and for burying deeply on the basis, underground water table is buried again when more shallow, generally can adopt preboring formula or self-drilling type side pressure test method, shortcoming is truly reflect structure composition deformation characteristics of other compressive strain method for measurement and principle.Also can adopt the flat chisel test method, its shortcoming is that the soil layer disturbance is out of shape greater than measuring deformation, the difficult true reflection soil properties of data, and confidence level is poor.Be exactly to adopt drill hole sampling in addition, the method that shop experiment records, the data confidence level relies on soil property amount, operant level, pressure to be provided with etc., the operation link that relates to is many, and the final data distortion is bigger, and value is not high, main be drill hole sampling after, soil sample stress discharges, and the virgin stress environment changes, and measured test figure and actual deviation are bigger.
Summary of the invention
The objective of the invention is according to above-mentioned the deficiencies in the prior art part, a kind of deep horizontal load testing method is provided, this method adopts the reducing pore-forming, directly cut the soil layer testing site, hydraulic-driven classification pressurization, the load plate level is to moving, data acquisition system (DAS) is gathered the deformation values under each stage pressure in real time, measure the horizontal modification value of soil layer under the different pressures state, be in substantially under the virgin state of stress, truly reflect the stress characteristics under the soil layer field condition at soil layer.
The object of the invention realizes being finished by following technical scheme:
A kind of deep horizontal load testing method, it is characterized in that this method adopts following step: A. pore-forming to testing site requires the degree of depth; B. in pore-forming, be pressed into deep horizontal load testing instrument, to the position, testing site; C. pressure transducer that will be connected with test instrument and displacement transducer computing machine make zero; D. the maximum pressure and the pressure classification that need load according to testing site soil layer property design experiment instrument; E. the test instrument on-load pressure is collected corresponding displacement simultaneously; F. after testing requirements is satisfied in this testing site, the unloading of test instrument load plate, deep horizontal load testing instrument promotes and portals; G. repeat aforementioned A-F step until the test of finishing all design experiment soil layers.
What pore-forming adopted is the reducing pore-forming, and the reducing pore-forming is to adopt reducing drilling equipment pore-forming, with the original state of the soil layer of warranty test point.
Deep horizontal load testing instrument comprises load plate, adds load device, part of detecting, closure casing, is provided with packoff between this housing and the load plate, adds load device and part of detecting and is positioned at the closure casing inner chamber, adds the load device and fixedlys connected with load plate.
What add the employing of load device is the composite oil cylinder that is constituted by two oil cylinders, and wherein each oil cylinder comprises piston, the axis of the piston, fixedlys connected with load plate in the end of the axis of the piston.The axis of the piston comprises first stage piston axle, second piston axle, and wherein fixedly connected with load plate in the end of second piston axle.
Above-mentioned test instrument on-load pressure is collected corresponding displacement simultaneously and is referred to: at first loads first order pressure, the load plate horizontal direction is extruded, gather corresponding displacement simultaneously; Judge requirement according to load test is stable afterwards, computing machine judges automatically and gathers corresponding displacement, loads the next stage design load automatically after reaching stability requirement; Require repeated acquisition, load step according to loading afterwards; Surpassing straight-line segment two-stage load according to on-load pressure-displacement curve when asking the solum horizontal resistance coefficient at last both can meet the demands.
Advantage of the present invention is, test philosophy is clear, and test findings is directly perceived, can truly reflect the stress characteristics under the soil layer field condition, adopt directly incision soil layer, load plate is close to the testing site, soil layer is in virgin state of stress substantially, and every layer of soil can carry out the multiple spot detection validation, and real result is reliable.
Description of drawings
Accompanying drawing 1 is structural representation of the present invention;
Accompanying drawing 2 is part section structural representation of the present invention;
Accompanying drawing 3 is pressure chamber of the present invention cross-sectional view;
Accompanying drawing 4 is pressure chamber of the present invention working state structure synoptic diagram;
Accompanying drawing 5 is hydraulic schematic diagram of the present invention;
Accompanying drawing 6 is load test P of the present invention (pressure)-S (displacement) curve map;
Embodiment
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
Shown in Fig. 1-6, label 1-33 represents respectively: cut native frame case 1, cut native blade 2, cylinder stent 3, retainer plate 4, cylinder cap 5, load plate (loading ring flange) 6, second piston axle 7, O-ring seal 8, cylinder body 9, O-ring seal 10, piston 11, first stage piston axle 12, central housing 13, closure 14, displacement transducer lay down location 15, be pressed into cutting bucket 16, fuel tank 17, oil filter 18, oil pump 19, motor 20, safe pressure valve 21, pressure regulator valve 22, tensimeter 23, accumulator 24, two-position four-way valve 25, two-position four-way valve 26, hydraulic control one-way valve 27, accumulator 28, tensimeter 29, accumulator 30, tensimeter 31, hydraulic control one-way valve 32, composite oil cylinder 33.
Embodiment:
Present embodiment adopts following step:
A. adopt drilling equipment pore-forming to the testing site of reducing pore-forming to require the degree of depth, with the original state of the soil layer of warranty test point;
B. be pressed into deep horizontal load testing instrument in pore-forming, when being pressed into, the native device of cutting of test instrument is finished soil body cutting, to design experiment point position, to the position, testing site.This test instrument comprises load plate 6, adds the load device, part of detecting, closure casing 14, be provided with O-ring seal 10 between this housing 14 and the load plate 6, add the inner chamber that load device and part of detecting are positioned at closure casing 14, add the load device and load plate 6 is bolted to connection.What add the employing of load device is the composite oil cylinder 32 that is constituted by two oil cylinders, and wherein each oil cylinder comprises piston 11, first stage piston axle 12, second piston axle 7, and the end of second piston axle 7 and load plate 6 are bolted to connection.The first stage piston axle 12 of two oil cylinders is positioned at central housing 13.
The bottom of closure casing 14 is set with cuts native device.This is cut native device and comprises and cut native frame case 1, cut native blade 2, be pressed into cutting bucket 16, wherein cuts native frame case 1 and adopts supports by bolt with closure casing 14, is pressed into cutting bucket 16 and cuts native blade 2 screw threads and be fixed on and cut on the native frame case.
Displacement transducer in the part of detecting is fixed in cylinder body, shift end and the axis of the piston synchronization action, and the pressure transducer in the part of detecting is positioned at the hydraulic circuit input end.
C. pressure transducer that will be connected with test instrument and displacement transducer computing machine make zero;
D. the maximum pressure and the pressure classification that need load according to testing site soil layer property design experiment instrument;
E. test instrument on-load pressure, collect corresponding displacement simultaneously, flow process is: at first pressurize according to the testing requirements classification by composite oil cylinder 32, load first order pressure, load plate 6 difference along continuous straight runs with both sides under the hydraulic jack effect extrude, gather corresponding displacement simultaneously, measure the horizontal modification value of soil layer under the different pressures state; Judge requirement according to load test is stable afterwards, computing machine judges automatically and gathers corresponding displacement, loads the next stage design load automatically after reaching stability requirement; Require repeated acquisition, load step according to loading afterwards; When asking the solum horizontal resistance coefficient at last, surpass straight-line segment two-stage load according to on-load pressure-displacement curve and both can meet the demands.
F. after testing requirements was satisfied in this testing site, 6 unloadings of test instrument load plate were regained, and deep horizontal load testing instrument promotes and portals;
Can repeat aforementioned A-F step until the test of finishing all design experiment soil layers.
Claims (6)
1, a kind of deep horizontal load testing method, it is characterized in that this method adopts following step: A. pore-forming to testing site requires the degree of depth; B. in pore-forming, be pressed into deep horizontal load testing instrument, to the position, testing site; C. pressure transducer that will be connected with test instrument and displacement transducer computing machine make zero; D. the maximum pressure and the pressure classification that need load according to testing site soil layer property design experiment instrument; E. the test instrument on-load pressure is collected corresponding displacement simultaneously; F. after testing requirements is satisfied in this testing site, the unloading of test instrument load plate, deep horizontal load testing instrument promotes and portals.
2, a kind of deep horizontal load testing method according to claim 1, what it is characterized in that described pore-forming adopts is the reducing pore-forming, the reducing pore-forming is to adopt reducing drilling equipment pore-forming, with the original state of the soil layer of warranty test point.
3, a kind of deep horizontal load testing method according to claim 1, it is characterized in that described deep horizontal load testing instrument comprises load plate, adds load device, part of detecting, closure casing, be provided with packoff between this housing and the load plate, add load device and part of detecting and be positioned at the closure casing inner chamber, add the load device and fixedly connected with load plate.
4, a kind of deep horizontal load testing method according to claim 3, it is characterized in that described what add that the load device adopts is the composite oil cylinder that is constituted by two oil cylinders, wherein each oil cylinder comprises piston, the axis of the piston, fixedlys connected with load plate in the end of the axis of the piston.
5, a kind of deep horizontal load testing method according to claim 4 is characterized in that described the axis of the piston comprises first stage piston axle, second piston axle, and wherein fixedly connected with load plate in the end of second piston axle.
6, according to claim 1 or 3 described a kind of deep horizontal load testing methods, it is characterized in that described test instrument on-load pressure, collecting corresponding displacement simultaneously refers to: at first load first order pressure, the load plate horizontal direction is extruded, gather corresponding displacement simultaneously; Judge requirement according to load test is stable afterwards, computing machine judges automatically and gathers corresponding displacement, loads the next stage design load automatically after reaching stability requirement; Require repeated acquisition, load step according to loading afterwards; Surpassing straight-line segment two-stage load according to on-load pressure-displacement curve when asking the solum horizontal resistance coefficient at last both can meet the demands.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100254944A CN100552419C (en) | 2006-04-06 | 2006-04-06 | Deep horizontal load testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100254944A CN100552419C (en) | 2006-04-06 | 2006-04-06 | Deep horizontal load testing method |
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| Publication Number | Publication Date |
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| CN1831511A true CN1831511A (en) | 2006-09-13 |
| CN100552419C CN100552419C (en) | 2009-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100254944A Expired - Fee Related CN100552419C (en) | 2006-04-06 | 2006-04-06 | Deep horizontal load testing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104404940A (en) * | 2014-12-05 | 2015-03-11 | 西南交通大学 | High-pressure, waterproof and self-stabilized type load testing device for deep soil layer |
| CN104895037A (en) * | 2015-06-10 | 2015-09-09 | 中国地质大学（武汉） | Deep stratum horizontal resistance coefficient in-situ tester |
| CN109183863A (en) * | 2018-10-22 | 2019-01-11 | 深圳市路桥建设集团有限公司 | A kind of device and method of the interior static horizontal loading test for surveying the soil body of foundation pile |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471919A (en) * | 2013-09-18 | 2013-12-25 | 上海交通大学 | Portable one-dimensional stress relaxation testing device and testing method thereof |
-
2006
- 2006-04-06 CN CNB2006100254944A patent/CN100552419C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104404940A (en) * | 2014-12-05 | 2015-03-11 | 西南交通大学 | High-pressure, waterproof and self-stabilized type load testing device for deep soil layer |
| CN104404940B (en) * | 2014-12-05 | 2016-04-13 | 西南交通大学 | A kind of Deep Soil Layers high pressure waterproof self-stabilising load test device |
| CN104895037A (en) * | 2015-06-10 | 2015-09-09 | 中国地质大学（武汉） | Deep stratum horizontal resistance coefficient in-situ tester |
| CN104895037B (en) * | 2015-06-10 | 2016-06-01 | 中国地质大学（武汉） | Deep formation static horizontal loading test in-situ test instrument |
| CN109183863A (en) * | 2018-10-22 | 2019-01-11 | 深圳市路桥建设集团有限公司 | A kind of device and method of the interior static horizontal loading test for surveying the soil body of foundation pile |
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| Publication number | Publication date |
|---|---|
| CN100552419C (en) | 2009-10-21 |
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Granted publication date: 20091021 Termination date: 20170406 |