CN105926564A - Composite foundation load detection method - Google Patents
Composite foundation load detection method Download PDFInfo
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- CN105926564A CN105926564A CN201610266241.XA CN201610266241A CN105926564A CN 105926564 A CN105926564 A CN 105926564A CN 201610266241 A CN201610266241 A CN 201610266241A CN 105926564 A CN105926564 A CN 105926564A
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- 238000001514 detection method Methods 0.000 title claims abstract description 91
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 239000004568 cement Substances 0.000 claims abstract description 155
- 238000012360 testing method Methods 0.000 claims abstract description 65
- 238000000034 method Methods 0.000 claims abstract description 31
- 238000010276 construction Methods 0.000 claims abstract description 26
- 238000002156 mixing Methods 0.000 claims description 145
- 235000019738 Limestone Nutrition 0.000 claims description 31
- 239000006028 limestone Substances 0.000 claims description 31
- 239000002689 soil Substances 0.000 claims description 25
- 239000002699 waste material Substances 0.000 claims description 13
- 238000011068 loading method Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 230000007547 defect Effects 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 5
- 240000002853 Nelumbo nucifera Species 0.000 claims description 5
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 abstract description 14
- 239000000843 powder Substances 0.000 abstract description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 2
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 2
- 239000004571 lime Substances 0.000 abstract 2
- 239000002956 ash Substances 0.000 description 6
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/08—Investigation of foundation soil in situ after finishing the foundation structure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Soil Sciences (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a composite foundation load detection method. The composite foundation load detection method includes the following steps that (a), site clearing is performed; (b), two-way cement stirring piles are selected; (c), load detection is performed; and (d), the two-way cement stirring piles are analyzed. According to the method, the selected two-way cement stirring piles are subjected to number marking, repeated detection of loads of the two-way cement stirring piles is prevented, the construction period can be shortened, and cost can be reduced. According to the method, the average value of test data corresponding to lime powder detection points of the two-way cement stirring piles is obtained, the average load at the positions of the two-way cement stirring piles is acquired, influences caused by the fact that the load measured through a single lime powder detection point is too high or too low are eliminated, the deviation arrange of the obtained composite foundation load and the actual load is small, the acquired test data are high in precision, extremely high reference value is achieved, the cement stirring piles and tidal marsh mud around the piles can form a composite foundation jointly, and therefore the bearing capacity of the foundation is improved; and meanwhile, by means of the method, the detection stability of a detection device can be improved, and load detection is wide in application range.
Description
Technical field
The invention belongs to two-way Construction Techniques for Cement Mixing Pile field, be specifically related to a kind of composite foundation load inspection
Survey method.
Background technology
Along with investment on water conservancy in recent years and construction are flourish, investment more than hundred million yuan easily, hydraulic engineering
Based process design and construction uses cement mixing pile more and more universal.The work efficiency of marine deep layer bidirectional stirring pile
Doubling than unidirectional mixing pile, bi-directional cement soil stake cement earth pile more unidirectional than same diameter is more closely knit, and bearing capacity is more
High.
Two-way cement mixing pile means and utilizes 42.5# ordinary cement to make firming agent, by the Bidirectional agitator of patent
Tool, below ground blotter operating platform, tidal land mud and cement hardener action of forced stirring are merged by original place,
By producing physics and the polyreaction of chemistry between firming agent and tidal land mud, tidal land mud is made to condense into some strength
Cement mixing method.Cement mixing pile forms composite foundation together with stake week tidal land mud, thus improves ground and hold
Load power, reduces settlement of foundation and lateral displacement amount.Explored by the construction of two-way cement mixing pile, improve,
Mature and stable and successful Application, embodies bi-directional cement soil mixing pile than unidirectional cement-soil stirring pile construction speed
Comparatively fast, pile quality higher, operation is relatively flexible, and security performance, to adapt to ability stronger.Marine 20m
Deep following deep layer bi-directional cement soil mixing pile construction is the most ripe, can guarantee that soil cement quality and ground are steady
Qualitative, it is that a kind of operation is simple, practicable construction method, there is bigger promotional value.After construction
Two-way cement mixing pile need to carry out composite foundation load detection work, the bearing capacity of detection construction area,
Judge the two-way cement mixing pile constructed whether conformance with standard.But the work of composite foundation load detection at present
Two-way cement mixing pile of opposing detects one by one, long construction period, and cost is high, and the detection taked
The data precision that method obtains is low, and reference value is low.
Summary of the invention
Present invention aim at solving above-mentioned technical problem present in prior art, it is provided that a kind of composite foundation
Loading testing method, can shorten construction period, reduces cost, can improve detection stability simultaneously, obtains double
Average load at cement mixing pile, obtained composite foundation load is less with real load deviation range,
Obtained data testing accuracy is high, has high reference value.
In order to solve above-mentioned technical problem, the present invention adopts the following technical scheme that
A kind of composite foundation loading testing method, it is characterised in that comprise the steps:
(a) site clearing；
B () chooses two-way cement mixing pile: choose two-way cement mixing pile sum 1/3 conduct constructed
Load detection target, the stake position of selected two-way cement mixing pile is distributed as triangle, then to choosing
Two-way cement mixing pile carries out label 1～N, then in each two-way cement mixing pile periphery detection chosen
On ground, 4～6 pulverized limestone test points are set with pulverized limestone, then on the two-way cement mixing pile chosen are
Upper safety line；
C () load detects: first detect No. 1 two-way cement mixing pile, stir at No. 1 two-way cement
Mix mounting and fixing bracket on the ground of stake, then on fixed support, fix support platform, then in support platform
Upper installation sliding support, then installation detecting device on sliding support, then pass through sliding support and detection filled
Put the pulverized limestone test point moving to No. 1 two-way cement mixing pile, detect device with gripping means grips, and use
Safety line ties down detection device, then holes at pulverized limestone test point, is vertically screwed into by bearing plate
The following desired depth of soil layer, buries according to entering a pitch under every revolution, then pacifies at sliding support
Dress hydraulic jack and counterforce device, then the dial gauge surveying reading bearing plate displacement is installed, by force cell even
Wiring is connected with data display instrument and adjustment is correct, then pressurizes bearing plate classification with hydraulic jack, reads
Take test data, then unclamp clamping device mobile sliding support, detection device is moved to No. 1 two-way water
Another pulverized limestone test point of mud mixing pile, it then follows a upper pulverized limestone test point same steps carries out load
Detect, and data, then the pulverized limestone test point pair to No. 1 two-way cement mixing pile are tested in reading accordingly
The test data answered obtain meansigma methods, and meansigma methods is as the load of No. 1 two-way cement mixing pile, then by 1
Number two-way cement mixing pile periphery is removed, finally by No. 1 two-way cement mixing pile for the device detecting work
On safety rope untie, complete No. 1 two-way cement mixing pile load detection work, then two-way to 2～No. N
Cement mixing pile carries out load detection work respectively, 2～No. N two-way cement mixing pile load detection work with
The load detection work of No. 1 two-way cement mixing pile is consistent；
(d) two-way cement mixing pile analysis: the load data of 1～No. N two-way cement mixing pile is plotted to
On curve chart, contrast the difference between the load data of each two-way cement mixing pile, find out existing defects
Two-way cement mixing pile, then scene carries out overall structure detection to this two-way cement mixing pile, it is judged that this pair
To the quality problems of cement mixing pile, then according to this two-way cement mixing pile is repaired by regulation.
Further, the construction that the work of step (a) site clearing is specially at two-way cement mixing pile periphery is discarded
Thing is collected, and to the construction waste collected according to rubble garbage, recovering discarded material, harmful
Garbage three major types is stacked, then for construction waste, by job site director carry out arrange and
Supervision, the rubble garbage that each two-way cement mixing pile periphery is stacked is transported to appointed place by truck and enters
Row processes, and the recovering discarded material that each two-way cement mixing pile periphery is stacked is born by ministry of materials's material group
Duty reclaims, and the bazardous waste that each two-way cement mixing pile periphery is stacked is transported to appointed place and destroys.
Further, in the detection of step (c) load, bearing plate is vertically being screwed into the following desired depth of soil layer
Before, use cloth to wipe with and wipe bearing plate, wiping process coordinates hydraulic giant be carried out.
Further, in the detection of step (c) load, with shoveling instrument by bottom the pulverized limestone test point after pore-forming
Hack remove, then plank periphery is destroyed soil leveling be compacted.
Further, in the detection of step (c) load, when bearing plate is vertically screwed into soil layer following desired depth,
Remain a constant speed screw-in, screws in speed 1～2mm/s, screws in continuously.
Further, in the detection of step (c) load, bearing plate is vertically screwed in the following desired depth of soil layer,
Bearing plate need to be watched attentively and screw in situation, vertically screw in process produced problem for bearing plate and take to solve accordingly
Scheme.
Due to the fact that and have employed technique scheme, have the advantages that
1, the stake position of the two-way cement mixing pile selected by the present invention is distributed as triangle, and so selected 1/3
The load detection of two-way cement mixing pile represents the load detection of all two-way cement mixing piles, and to choosing
Two-way cement mixing pile carry out label, prevent the duplicate detection of two-way cement mixing pile load, can shorten and execute
In the work cycle, reduce cost；
2, the present invention is arranged with pulverized limestone on the ground of each two-way cement mixing pile periphery detection chosen
4～6 pulverized limestone test points, and all pulverized limestone test points of this two-way cement mixing pile are carried out load inspection
Survey, and the test data that the pulverized limestone test point of this two-way cement mixing pile is corresponding are obtained meansigma methods, averagely
It is worth the load as this two-way cement mixing pile, so can obtain the average load at two-way cement mixing pile,
Get rid of the impact that load that single ashes test point records is too high or too low, obtained composite foundation load
Less with real load deviation range, obtained data testing accuracy is high, has high reference value,
So contrast the difference between the load data of each two-way cement mixing pile, find out the two-way water of existing defects
Mud mixing pile, then scene carries out overall structure detection to this two-way cement mixing pile, it is judged that this two-way cement
The quality problems of mixing pile, then according to this two-way cement mixing pile is repaired by regulation so that cement stirs
Mix stake and form composite foundation together with stake week tidal land mud, thus improve foundation bearing capacity, reduce settlement of foundation and
Lateral displacement amount；
3, the present invention when carrying out load detection to ashes test point, by support platform to whole detection device
It is supported acting on, then passes through clamping action and the safety line fastening effect of clamping device, detection can be improved
The stability of device detection, and slided in support platform by sliding support, ashes detection can be clicked on
Row conversion, it is not necessary to mounting and fixing bracket, support platform and detection device repeatedly, accelerates detection speed；
4, in concrete load detects, use bearing plate to be vertically screwed into the following desired depth of soil layer, use oil pressure
Jack pair bearing plate classification is pressurizeed, read test data, and obtained data testing accuracy is high, Er Qiezai
Lotus detection is applied widely；
5, after the load detection to each two-way cement mixing pile, need will be arranged on two-way cement mixing pile
Safety rope untie, be so not provided with safety rope two-way cement mixing pile explanation be complete detection work,
The two-way cement mixing pile arranging safety rope is also not fully complete detection work, and person in overall is very clear, for existing
Field situation arranges workmen, accelerates detection job schedule.
Accompanying drawing explanation
The invention will be further described below in conjunction with the accompanying drawings:
Fig. 1 is the construction process figure of the present invention a kind of composite foundation loading testing method；
Fig. 2 is the site plan that in the present invention, two-way cement mixing pile is chosen；
Fig. 3 is the structural representation of load detection construction in the present invention.
Detailed description of the invention
The scope of application of the present invention: be applicable to the sea wall mixing pile degree of depth less than 20m sea mud soil, land soft
The mixing pile pile foundation construction of soil, uses two-way cement mixing pile driving construction the most practical, and the suitability is wide.
As shown in Figure 1 to Figure 3, a kind of composite foundation loading testing method, comprise the steps:
(a) site clearing: the construction waste at two-way cement mixing pile 1 periphery is collected, and to receipts
Collect to construction waste carry out heap according to rubble garbage, recovering discarded material, bazardous waste three major types
Put.Then for construction waste, job site director arrange and supervise.Each two-way cement
The rubble garbage that mixing pile 1 periphery is stacked is transported to appointed place by truck and processes；Each two-way
The recovering discarded material that cement mixing pile 1 periphery is stacked is carried out being responsible for recovery by ministry of materials's material group；Each double
Bazardous waste to the stacking of cement mixing pile 1 periphery is transported to appointed place and destroys.
B () chooses two-way cement mixing pile: choose two-way cement mixing pile 1 sum 1/3 constructed and make
Detecting target for load, the quantity generally chosen should be less than the 30% of total amount of pile.Selected is double
It is distributed as triangle to the stake position of cement mixing pile 1, then the two-way cement mixing pile 1 chosen is marked
Number 1～N, N is typically greater than the natural number of 10.Then each two-way cement mixing pile chosen 1 week
With pulverized limestone, 4～6 pulverized limestone test points 2 are set, then at the two-way cement chosen on the ground that frontier inspection is surveyed
Safety line 3 is fastened on mixing pile 1.
C () load detects: first detect No. 1 two-way cement mixing pile, stir at No. 1 two-way cement
Mix mounting and fixing bracket 4 on the ground of stake, then on fixed support 4, fix support platform 5, then supporting
Sliding support 6, then installation detecting device 7 on sliding support 6 are installed on platform 5.Then pass through slip
Detection device 7 is moved to the pulverized limestone test point 2 of No. 1 two-way cement mixing pile by frame 6, presss from both sides with clamping device 8
Tight detection device 7, and tie down detection device 7 with safety line 3.
Then hole at pulverized limestone test point 2, with shoveling instrument by the pulverized limestone test point 2 after pore-forming
The hack of bottom is removed, the soil leveling compacting that then periphery is destroyed by plank.Bearing plate is vertically screwed into soil
The following desired depth of layer, before bearing plate is vertically screwed into the following desired depth of soil layer, uses cloth to wipe with to wipe and holds
Pressing plate, coordinates hydraulic giant to be carried out, in order to avoid being brought in sleeve pipe by earth in wiping process.According to every revolution
Under enter a pitch and bury, when bearing plate is vertically screwed into soil layer following desired depth, remain a constant speed
Screw in, screw in speed 1～2mm/s, screw in continuously.Bearing plate is vertically screwed into the following desired depth of soil layer
In, bearing plate need to be watched attentively and screw in situation, vertically screw in process produced problem for bearing plate and take accordingly
Solution.
Then at sliding support 6, hydraulic jack and counterforce device are installed, suitably in the case of can be selected for corresponding
The instruments such as sensor, amplifier, data acquisition unit, record display device, it is simple to obtain data accurately.Again
Install and survey the dial gauge reading bearing plate displacement, force cell connecting line is connected with data display instrument and adjustment
Correctly.Then with hydraulic jack, bearing plate classification is pressurizeed, read test data.When following situations occurs
For the moment, pressurization can be terminated: 1, the lateral extrusion significantly of the soil around bearing plate；2, settling amount is hurried
Increase；3, in pressure process, in 24h, the rate of settling can not reach stability criterion；4, settling amount and pressure-bearing
Plate width or diameter ratio are more than or equal to 0.06.
Then unclamp clamping device 8 mobile sliding support 6, detection device 7 is moved to No. 1 two-way cement and stirs
Mix another pulverized limestone test point 2 of stake, it then follows upper pulverized limestone test point 2 same steps carries out load inspection
Survey, and data are tested in reading accordingly, then right to the pulverized limestone test point 2 of No. 1 two-way cement mixing pile
The test data answered obtain meansigma methods, and meansigma methods is as the load of No. 1 two-way cement mixing pile, then by 1
Number two-way cement mixing pile periphery is removed, finally by No. 1 two-way cement mixing pile for the device detecting work
On safety rope untie, complete No. 1 two-way cement mixing pile load detection work.
Then 2～No. N two-way cement mixing pile are carried out load detection work, 2～No. N two-way cement respectively
The load detection work of mixing pile is consistent with the load detection work of No. 1 two-way cement mixing pile.
(d) two-way cement mixing pile analysis: the two-way cement mixing pile in report uses fitting process to calculate carrying
The bearing capacity data of 1～No. N two-way cement mixing pile are plotted on curve chart by power, contrast each two-way water
Difference between the bearing capacity data of mud mixing pile, finds out the two-way cement mixing pile of existing defects, then existing
Field carries out overall structure detection to this two-way cement mixing pile, it is judged that the quality problems of this two-way cement mixing pile,
Two-way cement mixing pile is divided into four big classes, is broadly divided into 1, flawless full pile；2, there is slight lacking
Fall into, but have substantially no effect on the stake of original design pile structural strength；3, there is open defect, affect original design pile body
The stake (can partly utilize or demote use) of structural strength；4, there is the stake (useless stake) of major defect.Then
According to the rules this two-way cement mixing pile is repaired.Load testing goal is mainly to two-way cement mixing pile
Carry out quality generaI investigation, check pile body integrity, if with the presence of defects such as broken pile, folder mud, isolation, necking downs
And basic fixed position.
In actually detected, the preloading of Loading Test of Composite Foundation scene examines 52 two-way cement mixing piles,
Assay shows, wherein hopes that tableland bearing capacity is more than 100kPa, city square, Wang Jiao and Macau Fisherman's Wharf
Three Regional carrying capacity are more than 85kPa, and indices is satisfied by designing requirement, the two-way cement constructed
Mixing pile is the most qualified.
The stake position of the two-way cement mixing pile selected by the present invention is distributed as triangle, so selected 1/3 two-way
The load detection of cement mixing pile represents the load detection of all two-way cement mixing piles, and double to choose
Carry out label to cement mixing pile, prevent the duplicate detection of two-way cement mixing pile load, construction week can be shortened
Phase, reduce cost.The present invention uses Calx on the ground of each two-way cement mixing pile periphery detection chosen
Powder arranges 4～6 pulverized limestone test points, and carries out all pulverized limestone test points of this two-way cement mixing pile
Load detects, and the test data that the pulverized limestone test point of this two-way cement mixing pile is corresponding are obtained meansigma methods,
Meansigma methods is as the load of this two-way cement mixing pile, and so can obtain at two-way cement mixing pile is average
Load, gets rid of the impact that load that single ashes test point records is too high or too low, obtained compoundly
Base load lotus is less with real load deviation range, and obtained data testing accuracy is high, has high reference
It is worth, so contrasts the difference between the load data of each two-way cement mixing pile, find out existing defects
Two-way cement mixing pile, then scene carries out overall structure detection to this two-way cement mixing pile, it is judged that this pair
To the quality problems of cement mixing pile, then according to this two-way cement mixing pile is repaired by regulation so that
Cement mixing pile forms composite foundation together with stake week tidal land mud, thus improves foundation bearing capacity, reduces ground
Sedimentation and lateral displacement amount.The present invention when carrying out load detection to ashes test point, by support platform pair
Whole detection device is supported acting on, then passes through clamping action and the safety line fastening effect of clamping device,
The stability of height detection device detection can be put forward, and slided in support platform by sliding support, can be to ash
Powder test point is changed, it is not necessary to mounting and fixing bracket, support platform and detection device repeatedly, accelerates detection
Speed.In concrete load detects, use bearing plate to be vertically screwed into the following desired depth of soil layer, use oil pressure
Jack pair bearing plate classification is pressurizeed, read test data, and obtained data testing accuracy is high, Er Qiezai
Lotus detection is applied widely.After the load detection to each two-way cement mixing pile, need to will be arranged on two-way
Safety rope on cement mixing pile is untied, and the two-way cement mixing pile explanation being so not provided with safety rope is the completeest
Becoming detection work, the two-way cement mixing pile arranging safety rope is also not fully complete detection work, person in overall one mesh
It is clear, arranges workmen for field condition, accelerate detection job schedule.
Load detection points for attention:
1, the unit by having coherent detection qualification carry out load detection instruct work.
2, load detection relates to equipment, accuracy of instrument meets requirement and is carried out in accordance with regulations installation, removes.
3, testing crew enters job site safe wearing cap and the safety protection facility of other necessity.
4, in strict accordance with relevant testing regulations operation, violation operation is forbidden.
5, site operation safety technique for using electricity code and equipment safety regulation for operations are strictly observed.
These are only the specific embodiment of the present invention, but the technical characteristic of the present invention is not limited thereto.Any
Based on the present invention, for solving essentially identical technical problem, it is achieved essentially identical technique effect, institute
Simple change, equivalent or the modifications etc. made, are all covered by among protection scope of the present invention.
Claims (6)
1. a composite foundation loading testing method, it is characterised in that comprise the steps:
(a) site clearing；
B () chooses two-way cement mixing pile: choose the two-way cement mixing pile sum 1/3 constructed as carrying
Lotus detection target, the stake position of selected two-way cement mixing pile is distributed as triangle, then to choosing
Two-way cement mixing pile carry out label 1～N, then at each two-way cement mixing pile periphery chosen
With pulverized limestone, 4～6 pulverized limestone test points are set, then at the two-way cement chosen on the ground of detection
Safety line is fastened on mixing pile；
C () load detects: first detect No. 1 two-way cement mixing pile, at No. 1 two-way cement mixing
Mounting and fixing bracket on the ground of stake, then on fixed support, fix support platform, then flat in support
Installing sliding support, then installation detecting device on sliding support on platform, then passing through sliding support will
Detection device moves to the pulverized limestone test point of No. 1 two-way cement mixing pile, with gripping means grips detection dress
Put, and tie down detection device with safety line, then hole at pulverized limestone test point, by pressure-bearing
Plate is vertically screwed into the following desired depth of soil layer, buries according to entering a pitch under every revolution,
Then at sliding support, hydraulic jack and counterforce device are installed, then install the hundred of survey reading bearing plate displacement
Divide table, force cell connecting line is connected with data display instrument and adjustment is correct, then with oil pressure thousand
Bearing plate classification is pressurizeed by jin top, read test data, then unclamps clamping device mobile slip
Frame, moves to another pulverized limestone test point of No. 1 two-way cement mixing pile, it then follows upper one by detection device
Individual pulverized limestone test point same steps carries out load detection, and reading tests data, accordingly then to 1
The test data that the pulverized limestone test point of number two-way cement mixing pile is corresponding obtain meansigma methods, and meansigma methods is made
It is the load of No. 1 two-way cement mixing pile, then is used for detecting work by No. 1 two-way cement mixing pile periphery
Make device remove, finally the safety rope on No. 1 two-way cement mixing pile is untied, complete No. 1 two-way
Then 2～No. N two-way cement mixing pile are carried out load inspection by cement mixing pile load detection work respectively
Survey work, 2～the load detection work of No. N two-way cement mixing pile and the load of No. 1 two-way cement mixing pile
Lotus detection work is consistent；
(d) two-way cement mixing pile analysis: the load data of 1～No. N two-way cement mixing pile is plotted to song
On line chart, contrast the difference between the load data of each two-way cement mixing pile, find out existing defects
Two-way cement mixing pile, then on-the-spot this two-way cement mixing pile is carried out overall structure detection, sentences
The quality problems of this two-way cement mixing pile disconnected, then according to this two-way cement mixing pile is carried out by regulation
Repair.
A kind of composite foundation loading testing method the most according to claim 1, it is characterised in that: step (a)
The construction waste that site clearing work is specially at two-way cement mixing pile periphery is collected, and right
The construction waste collected is according to rubble garbage, recovering discarded material, bazardous waste three major types
Stack, then for construction waste, job site director arrange and supervise, often
The rubble garbage that individual two-way cement mixing pile periphery is stacked is transported at appointed place by truck
Reason, the recovering discarded material that each two-way cement mixing pile periphery is stacked is born by ministry of materials's material group
Duty reclaims, and the bazardous waste that each two-way cement mixing pile periphery is stacked is transported to appointed place to be carried out
Destroy.
A kind of composite foundation loading testing method the most according to claim 1, it is characterised in that: step (c)
In load detection, before bearing plate is vertically screwed into the following desired depth of soil layer, uses cloth to wipe with to wipe and hold
Pressing plate, coordinates hydraulic giant to be carried out in wiping process.
A kind of composite foundation loading testing method the most according to claim 1, it is characterised in that: step (c)
In load detection, with shoveling instrument, the hack bottom the pulverized limestone test point after pore-forming is removed, then
The soil leveling compacting that periphery is destroyed by plank.
A kind of composite foundation loading testing method the most according to claim 1, it is characterised in that: step (c)
In load detection, when bearing plate is vertically screwed into soil layer following desired depth, remain a constant speed screw-in,
Screw in speed 1～2mm/s, screw in continuously.
A kind of composite foundation loading testing method the most according to claim 1, it is characterised in that: step (c)
In load detection, bearing plate is vertically screwed in the following desired depth of soil layer, bearing plate rotation need to be watched attentively
Enter situation, vertically screw in process produced problem for bearing plate and take corresponding solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610266241.XA CN105926564B (en) | 2016-04-26 | 2016-04-26 | A kind of composite foundation loading testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610266241.XA CN105926564B (en) | 2016-04-26 | 2016-04-26 | A kind of composite foundation loading testing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112502199A (en) * | 2020-11-19 | 2021-03-16 | 浙江邦尼建筑检测有限公司 | Foundation bearing capacity detection device |
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| SU1694775A1 (en) * | 1988-12-27 | 1991-11-30 | Войсковая Часть 52953 | Device for testing soils by static loads |
| CN101487273A (en) * | 2009-02-26 | 2009-07-22 | 建研地基基础工程有限责任公司 | Method and equipment for determining bearing capacity of existing building foundation |
| CN201762737U (en) * | 2010-09-07 | 2011-03-16 | 石旭东 | Shallow plate loading test modified device |
| CN102493500A (en) * | 2011-12-06 | 2012-06-13 | 湖北省电力勘测设计院 | Foundation base model test device capable of bidirectional loading |
| CN202830907U (en) * | 2012-10-16 | 2013-03-27 | 丁鉴群 | Improved static probing device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1694775A1 (en) * | 1988-12-27 | 1991-11-30 | Войсковая Часть 52953 | Device for testing soils by static loads |
| CN101487273A (en) * | 2009-02-26 | 2009-07-22 | 建研地基基础工程有限责任公司 | Method and equipment for determining bearing capacity of existing building foundation |
| CN201762737U (en) * | 2010-09-07 | 2011-03-16 | 石旭东 | Shallow plate loading test modified device |
| CN102493500A (en) * | 2011-12-06 | 2012-06-13 | 湖北省电力勘测设计院 | Foundation base model test device capable of bidirectional loading |
| CN202830907U (en) * | 2012-10-16 | 2013-03-27 | 丁鉴群 | Improved static probing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112502199A (en) * | 2020-11-19 | 2021-03-16 | 浙江邦尼建筑检测有限公司 | Foundation bearing capacity detection device |
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| CN105926564B (en) | 2019-08-06 |
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