CN104929161B - A kind of vertical compound water stop curtain body construction quality determining method - Google Patents
A kind of vertical compound water stop curtain body construction quality determining method Download PDFInfo
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- CN104929161B CN104929161B CN201510260196.2A CN201510260196A CN104929161B CN 104929161 B CN104929161 B CN 104929161B CN 201510260196 A CN201510260196 A CN 201510260196A CN 104929161 B CN104929161 B CN 104929161B
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Abstract
The present invention relates to a kind of vertical compound water stop curtain body construction quality determining method, belong to geotechnical engineering design and technical field of construction, not high for existing boring and coring method accuracy, efficiency is low problem.This detection method includes：First, some pvc pipes, a focus and a detector are provided；2nd, vertical compound water stop curtain body is divided into multiple detector units, each detector unit is divided into multiple test hole sections, each test hole section includes at least two instrument connections, determines hole position and the hole depth of instrument connection；3rd, open up instrument connection, the long coring of full stake, and transfer pvc pipe in instrument connection；4th, when a test hole section is detected, focus and detector are separately mounted to adjacent two test in the hole, after completing the detection of an instrument connection, focus and detector are exchanged hole position, complete the detection of another instrument connection, and successively each test hole section is detected；5th, pile quality is evaluated, provide treatment advice.
Description
Technical field
The present invention relates to geotechnical engineering design and technical field of construction, apply particularly to a kind of vertical compound water stop curtain body
Working medium quantity measuring method.
Background technology
For complicated geological condition near sea, during foundation pit enclosure design, vertical compound water stop curtain body includes three axes agitating pile
And high-pressure rotary jet grouting pile, more than bedrock surface, the axis of high-pressure rotary jet grouting pile and the three axes agitating pile stake heart weighs mutually three axes agitating pile
Close, that is, in concentric with the three axes agitating pile and embedded basement rock of high-pressure rotary jet grouting pile, about two overlap joint 1.0m.
Generally using the method for boring and coring, specific practice is for the quality testing of vertical compound water stop curtain：Using φ 110
Drill bit, drills through age 28d after construction, the vertical compound water stop curtain core sample in the long scope of full stake by the spacing of design requirement, bores
The core sample taking should seal immediately and carry out unconfined compression strength test in time.
But this detection method there are disadvantages that：
(1) core sample is easily broken
Because the inhomogeneities of soil cement, soil cement intensity are relatively low and drill core misoperation, in sampling process SMIS sample
Easily broken, testing result is it is difficult to ensure that its verity.
(2) pile body is produced and destroy
Bore extracting core process is that one kind damages detection method, pile body can be produced and destroy, cause pile body strong in detection process
Degree and anti-seepage effect have declined.
(3) detection time length, testing cost are high
Boring and coring detection time is long, and holes costly, therefore can only extract a small amount of stake and be detected.
(4) it is unable to complete detection
Boring and coring is arranged at a certain distance, can only be detected it is impossible to complete detection and evaluation for some spaced points
The construction quality of whole seepage proof curtain body.Therefore, how to provide a kind of accurate, efficient and low cost vertical compound water stop curtain
Body construction quality determining method, is the technical problem of those skilled in the art's urgent need to resolve.
Content of the invention
Present invention aims to vertical compound water stop curtain body mass defect that may be present, provide a kind of vertical
Compound water stop curtain body construction quality determining method, is evaluated to the quality of vertical compound water stop curtain body it is ensured that vertically answering
Close the water seepage prevention effect of water-stop curtain body, be excavation of foundation pit, the construction environment of foundation construction creation drying.
For solving above-mentioned technical problem, technical scheme is as follows：
A kind of vertical compound water stop curtain body construction quality determining method, described vertical compound water stop curtain body is applied to face
In the foundation pit enclosure structure of extra large bad ground, the bottom of described vertical compound water stop curtain body embeds in bedrock surface, including as follows
Step：
Step one, some pvc pipes of offer, a focus and a detector；
Step 2, described vertical compound water stop curtain body is divided into multiple detector units, each described detector unit divides
For multiple test hole sections, each is tested hole section and includes at least two instrument connections, determines hole position and the hole depth of described instrument connection；
Step 3, open up described instrument connection in the pile body of described vertical compound water stop curtain body, the long coring of full stake, and
Described pvc pipe is transferred in described instrument connection；
Step 4, a described test hole section be when being detected, described focus and described detector are separately mounted to adjacent
Two described test in the holes, after completing the detection of a described instrument connection, described focus and described detector are exchanged hole position,
Complete the detection of another described instrument connection, and record data simultaneously；So circulating repetition, successively to test hole section each described
Detected, and record data；
Step 5, according to the data of described step 4, described pile quality is evaluated.
Further, the entirety that described detector is made up of the cymoscope of 12 vertical spaced sets, adjacent institute
The spacing stating cymoscope is 0.5m.
Further, in described step 4, described test hole section includes instrument connection one and instrument connection two, described test hole section
Detection comprise the steps：
The first step, places described detector in described instrument connection one, arranges described focus in described instrument connection two；
Second step, adjusts the depth of described epicenter excitation point so that the depth of described epicenter excitation point and described detector
Excite described focus after the deep equality of described cymoscope of lowermost end, and received and record data by described detector；
3rd step, above carries described focus 1.0m, is excited for the second time, and is received and record data by described detector；
4th step, second step described in circulating repetition to the 3rd step, until complete the detection of described instrument connection one；
5th step, described detector and described focus is exchanged hole position, repeats the described first step to the 4th step, completes described
The detection of instrument connection two, so far, described test hole section detection completes.
Further, described 4th step also includes, and after described focus above carries 2.5m, need to above carry described detector 5.0m,
Make the deep equality of the shot point of described focus and the described cymoscope of described detector lowermost end.
Further, described step 3 includes laying described instrument connection, adjacent described instrument connection along described foundation ditch axis
Pitch-row L be 18m, described instrument connection embed described bedrock surface depth below d be not less than 5.0m.
Further, after described instrument connection construction finishes, transfer described pvc pipe in described test in the hole, described pvc pipe is deep
Enter described bedrock surface depth below and be not less than 5.0m.
Further, during the described instrument connection of construction, the basement rock core length of acquirement is not less than 5.0m.
Compared with prior art, beneficial the having technical effect that of the present invention：Provided in an embodiment of the present invention being vertically combined is stopped
Water curtain body construction quality determining method is it is adaptable to the quality of the foundation pit enclosure structure of the bad ground that borders on the sea completing to constructing
Detection, vertical compound water stop curtain body is divided into multiple detector units by this detection method, and each detector unit is divided into multiple surveys
Prospect hole section, each test hole section boring and coring simultaneously carries out independent acoustic CT detection.By construct complete be vertically combined only
Big spacing boring and coring in the pile body of water curtain body, acquired core sample can make sample for indoor uniaxial compressive strength test
And wave velocity test, such that it is able to the pile quality of direct detection Impermeable underground wall curtain body.Meanwhile, by adjacent test
In the hole is respectively provided with focus and detector carries out acoustic CT detection, and record data, realizes big spacing, all-round long detection vertically again
Close the construction quality of water-stop curtain body, operating frequency is high, accuracy of detection is high.Finally, by the description of live coring integrity, sample
Indoor uniaxial compressive strength test and wave velocity test, and wave velocity testing data analysiss contrast it is assumed that pile body construction quality is complete
Whole standard velocity of wave, and to poor, difference position carry out boring and coring checking, and by quality good, preferable, poor, differ from four
Grade is evaluated, and provides respective handling suggestion according to four grades, to ensure the water seepage prevention of vertical compound water stop curtain body
Effect, thus create dry construction environment for excavation of foundation pit, foundation construction.
Brief description
Fig. 1 is the construction technology process of the vertical compound water stop curtain body construction quality determining method of one embodiment of the invention
Figure；
Fig. 2 is the structural representation of the vertical compound water stop curtain body of one embodiment of the invention；
Fig. 3 be one embodiment of the invention vertical compound water stop curtain body construction quality determining method in instrument connection position
Schematic diagram；
Fig. 4 be one embodiment of the invention vertical compound water stop curtain body construction quality determining method in instrument connection one survey
Examination schematic diagram；
Fig. 5 be one embodiment of the invention vertical compound water stop curtain body construction quality determining method in instrument connection two survey
Examination schematic diagram.
In figure：
A- three axes agitating pile；B- high-pressure rotary jet grouting pile；1.-contain coral reef debris, the layer of sand of Coral Reef Rock；2.-middle part is strong
Weathered granite layer；3.-middle air slaking sial；1- instrument connection one；2- instrument connection two；3- focus；4- detector.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to vertical compound water stop curtain body construction quality testing proposed by the present invention
Method is described in further detail.According to following explanation and claims, advantages and features of the invention will become apparent from.Need
Bright, accompanying drawing, all in the form of very simplification and all using non-accurately ratio, only in order to convenience, lucidly aids in illustrating
The purpose of the embodiment of the present invention.For sake of convenience, described below " on ", D score consistent with accompanying drawing upper and lower direction, but
This can not become the restriction of technical solution of the present invention.
The invention provides a kind of vertical compound water stop curtain body construction quality determining method, to vertical compound water stop curtain
The quality of body is evaluated it is ensured that the water seepage prevention effect of vertical compound water stop curtain body, is excavation of foundation pit, foundation construction creation
The construction environment being dried.
Describe the vertical compound water stop curtain body construction quality determining method of the present invention with reference to Fig. 1 to Fig. 5 in detail.
Embodiment one
Fig. 1 is the construction flow chart of straight compound water stop curtain body construction quality determining method.Carry out scene first to survey
Examine the hole position to determine instrument connection and hole depth, next rig is in place, installation and debugging, then super hole cutter proceeds to predetermined absolute altitude, borehole cleaning,
Then in test in the hole decentralization pvc pipe, focus and detector, then explosive source, record data, last binding number are then placed
According to being divided into four grades to carry out quality evaluation, and provide corresponding treatment advice according to four grades.
Refer to Fig. 2 to Fig. 5, vertical compound water stop curtain body is by more than bedrock surface single φ 850@1,200 3 axle stirring
The single φ 900@600 high-pressure rotary jet grouting pile composition of concentric with the three axes agitating pile and embedded basement rock of stake, about two overlap joint 1.0m.
Vertical compound water stop curtain body be applied to from top to bottom by top contain coral reef debris, Coral Reef Rock layer of sand 1.；Middle part is strong
In the foundation pit enclosure structure of the bad ground that borders on the sea that weathered granite layer is 2. and in bottom, 3. air slaking sial forms.Vertically
The bottom of compound water stop curtain body embeds in bedrock surface, vertical compound water stop curtain body construction quality determining method, including following
Step：
S001：Some pvc pipes (not shown), a focus 3 and a detector 4 are provided；
S002：Vertical compound water stop curtain body is divided into multiple detector units, each detector unit is divided into multiple tests
Hole section (not shown), each test hole section includes at least two instrument connections, determines hole position and the hole depth of instrument connection；
S003：Open up instrument connection in the pile body of vertical compound water stop curtain body, the long coring of full stake, and in instrument connection under
Put pvc pipe；
S004：When one test hole section is detected, focus 3 and detector 4 are separately mounted to adjacent two instrument connection
In (1,2), after completing the detection of an instrument connection 1, focus 3 and detector 4 are exchanged hole position, completes another instrument connection 2
Detection, and record data simultaneously；So circulating repetition, detects to each test hole section successively, and record data；
S005：According to the data of S004, pile quality is evaluated.
Specifically, the vertical compound water stop curtain body construction quality determining method of the present invention, fully combines big spacing
Boring and coring and the advantage of sound wave C imaging, it is possible to achieve in high precision, high sensitivity, all-round long detect vertical compound water stop curtain
The construction quality of body.That is, by spacing boring big in the pile body of the vertical compound water stop curtain body completing of constructing
Coring, obtains core sample, and acquired core sample can make sample for indoor uniaxial compressive strength test and wave velocity test, thus can
Pile quality with direct detection Impermeable underground wall curtain body.Meanwhile, at the construction field (site), by by vertical compound water stop curtain
Body is divided into multiple detector units, and each detector unit is divided into multiple test hole sections, and each test hole section carries out independent acoustic CT
Detection, can achieve big spacing, the all-round long construction quality detecting vertical compound water stop curtain body.I.e. acoustic CT imaging technique detection
Method, operating frequency is high, and accuracy of detection is high, within its precision can reach 0.1m.And, acoustic CT imaging technique adopts transmission
Ripple propagation characteristic, waveform clear and intuitive it is easy to identification, delicately can reflect heterogeneous body, thus sensitivity is high.Additionally,
Acoustic CT detection method belongs to Non-Destructive Testing, detect at the scene vertical compound water stop curtain body pile quality when, will not be to stake
Body produces and destroys.
Specifically, the entirety that detector 4 is made up of the cymoscope (not shown) of 12 vertical spaced sets is adjacent
Cymoscope spacing be 0.5m.The cymoscope adopting in the present embodiment is hydrophones, and corresponding focus 3 shakes for electric spark
Source.
Especially, please continue to refer to Fig. 4 and Fig. 5, in S004, test hole section includes instrument connection 1 and instrument connection 22, test
The detection of hole section comprises the steps：
The first step, places detector 4 in instrument connection 1, arranges focus 3 in instrument connection 22；
Second step, the depth of adjustment focus 3 shot point is so that the inspection of the depth of focus 3 shot point and detector 4 lowermost end
Explosive source 3 after the deep equality of ripple device, and received and record data by detector 4；
3rd step, focus 3 above carries 1.0m, is excited for the second time, and is received and record data by detector 4；
4th step, circulating repetition second step to the 3rd step, until complete the detection of instrument connection 1；
5th step, detector 4 and focus 3 are exchanged hole position, and the circulating repetition first step, to the 4th step, completes instrument connection 22
Detection, so far, one test hole section detection complete.
Certainly, so that the deep equality of the cymoscope of the shot point of focus 3 and detector 4 lowermost end, when on focus 3
After carrying 2.5m, detector 4 then needs to carry 5.0m.
Please continue to refer to Fig. 3, in order to smoothly implement acoustic CT imaging method, data is reconnoitred according to field geology, by true
Determine bedrock surface buried depth, to determine the drilling depth of instrument connection, so that it is determined that instrument connection embeds bedrock surface depth below d being not less than
5.0m.Meanwhile, using big spacing boring and coring, along foundation ditch vertical compound water stop curtain body surrounding axis according to 18m's
Spacing defence line positioning in foundation pit enclosure body, measurement determines the hole position of instrument connection.That is, the level interval between adjacent instrument connection
L is 18m.Certainly, according to working procedure, after instrument connection construction finishes, in test in the hole decentralization pvc pipe, pvc pipe gos deep into bedrock surface
Depth below is not less than 5.0m.In order to draw materials conveniently, pvc pipe can select φ 70PVC to manage, and its wall thickness is 4mm, and intensity is 6
～7MPa.
Further, in order that describing pile quality with boring and coring method and choosing sample to carry out indoor uniaxial compressive strong
Degree test and wave velocity test, the complete long coring of stake during construction testing hole, and take basement rock core length to be not less than 5.0m.Bore
During the coring construction of hole, using the construction of conventional φ 110 rig drilling tool, boring aperture is not less than 120mm.Open up in instrument connection construction,
Drilling equipment is installed must straight, firm, base level.Rig vertical shaft center, head sheave center and orifice center must be same
On plumb line.It is ensured that rig not run-off the straight, displacement during unbearable, drill core hole perpendicularity deviation is not more than 0.5%.For
Obtain complete core sample, when carrying brill and unloading coring sample, answer unloading drill bit and reamer, forbid to beat and unload core.And, drill through
Core sample should form a line from top to bottom, form an entirety, to facilitate detailed description pile quality, and retention of taking photos.
Especially, the final step of whole detection method is aiming at test data, to vertical compound water stop curtain body
Construction quality carries out quality evaluation.Pass through live coring integrity description, the indoor uniaxial compressive strength test of sample and ripple
Speed test, and the contrast of wave velocity testing data analysiss is it is assumed that the complete standard velocity of wave of pile body construction quality, and to poor, difference
Position carries out boring and coring checking, finally by quality good, preferable, poor, differ from four grades and evaluated, fill in pile quality and comment
Valency table, and provide respective handling suggestion.The pile quality evaluation table shown in table for example can be produced as follows：
In sum, in the vertical compound water stop curtain body construction quality determining method that the present invention provides, by
Big spacing boring and coring in the pile body of vertical compound water stop curtain body that construction completes, acquired core sample can be made sample and supply
Indoor uniaxial compressive strength test and wave velocity test, such that it is able to the pile quality of direct detection Impermeable underground wall curtain body.With this
Meanwhile, in conjunction with acoustic CT imaging technique detection method, vertical compound water stop curtain body is divided into multiple detector units, each detection
Dividing elements are multiple test hole sections, and each test hole section carries out independent acoustic CT detection, realize big spacing, all-round long detection is hung down
The construction quality of straight compound water stop curtain body, operating frequency is high, and accuracy of detection is high.After the completion of detection, carry out data analysiss, by stake
Weight is divided into four grades, and provides respective handling suggestion according to described four grades, and does not meet quality to pile quality
The pile body of code requirement is taken and is employed all means available it is ensured that the water seepage prevention effect of vertical compound water stop curtain body, thus opening for foundation ditch
Dig, dry construction environment is created in foundation construction.
Foregoing description is only the description to present pre-ferred embodiments, not any restriction to the scope of the invention, this
Any change that the those of ordinary skill in bright field does according to the disclosure above content, modification, belong to the protection of claims
Scope.
Claims (5)
1. a kind of vertical compound water stop curtain body construction quality determining method, described vertical compound water stop curtain body is applied to border on the sea
In the foundation pit enclosure structure of bad ground, the bottom of described vertical compound water stop curtain body embed in bedrock surface it is characterised in that
Comprise the steps：
Step one, some pvc pipes of offer, a focus and a detector, described detector is by 12 vertical spaced sets
Cymoscope composition entirety, the spacing of adjacent described cymoscope is 0.5m；
Step 2, described vertical compound water stop curtain body is divided into multiple detector units, each described detector unit is divided into many
Individual test hole section, each test hole section includes at least two instrument connections, determines hole position and the hole depth of described instrument connection；
Step 3, open up described instrument connection in the pile body of described vertical compound water stop curtain body, the long coring of full stake, and described
Described pvc pipe is transferred in instrument connection；
When step 4, a described test hole section are detected, described focus and described detector are separately mounted to adjacent two
Individual described test in the hole, after completing the detection of a described instrument connection, described focus and described detector is exchanged hole position, completes
The detection of another described instrument connection, and record data simultaneously；So circulating repetition, is carried out to test hole section each described successively
Detection, and record data；Wherein, described test hole section includes instrument connection one and instrument connection two, the detection bag of described test hole section
Include following steps：
The first step, places described detector in described instrument connection one, arranges described focus in described instrument connection two；
Second step, adjusts the depth of described epicenter excitation point so that the depth of described epicenter excitation point and described detector bottom
Excite described focus after the deep equality of described cymoscope at end, and received and record data by described detector；
3rd step, above carries described focus 1.0m, is excited for the second time, and is received and record data by described detector；
4th step, second step described in circulating repetition to the 3rd step, until complete the detection of described instrument connection one；
5th step, described detector and described focus is exchanged hole position, repeats the described first step to the 4th step, complete described test
The detection in hole two, so far, described test hole section detection completes；
Step 5, according to the data of described step 4, described pile quality is evaluated.
2. as claimed in claim 1 vertical compound water stop curtain body construction quality determining method it is characterised in that the described 4th
Step also include, after described focus above carries 2.5m, need to above carry described detector 5.0m so that the shot point of described focus with described
The deep equality of the described cymoscope of detector lowermost end.
3. as claimed in claim 1 or 2 vertical compound water stop curtain body construction quality determining method it is characterised in that described
Step 3 includes laying described instrument connection along described foundation ditch axis, and pitch-row L of adjacent described instrument connection is 18m, described test
Hole embeds described bedrock surface depth below d and is not less than 5.0m.
4. as claimed in claim 3 vertical compound water stop curtain body construction quality determining method it is characterised in that described test
After hole construction finishes, transfer described pvc pipe in described test in the hole, described pvc pipe gos deep into described bedrock surface depth below not
Less than 5.0m.
5. as claimed in claim 4 vertical compound water stop curtain body construction quality determining method it is characterised in that construction is described
During instrument connection, the basement rock core length of acquirement is not less than 5.0m.
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| CN201510260196.2A CN104929161B (en) | 2015-05-20 | 2015-05-20 | A kind of vertical compound water stop curtain body construction quality determining method |
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| CN201510260196.2A CN104929161B (en) | 2015-05-20 | 2015-05-20 | A kind of vertical compound water stop curtain body construction quality determining method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101477084A (en) * | 2008-12-22 | 2009-07-08 | 铁道第三勘察设计院集团有限公司 | Method for detecting integrality of concrete pile body by elastic wave transmission mode |
| CN102296645A (en) * | 2011-06-02 | 2011-12-28 | 朱德兵 | Pile foundation quality detection method and device |
| CN103255785A (en) * | 2012-02-15 | 2013-08-21 | 陈彦平 | Technology for performing foundation pile quality detection and geology survey by adopting single tube longitudinal wave method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4667228B2 (en) * | 2005-12-21 | 2011-04-06 | 株式会社竹中工務店 | Pile inspection method and sensor crimping device |
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- 2015-05-20 CN CN201510260196.2A patent/CN104929161B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101477084A (en) * | 2008-12-22 | 2009-07-08 | 铁道第三勘察设计院集团有限公司 | Method for detecting integrality of concrete pile body by elastic wave transmission mode |
| CN102296645A (en) * | 2011-06-02 | 2011-12-28 | 朱德兵 | Pile foundation quality detection method and device |
| CN103255785A (en) * | 2012-02-15 | 2013-08-21 | 陈彦平 | Technology for performing foundation pile quality detection and geology survey by adopting single tube longitudinal wave method |
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