CN103362151B - Method for detecting prestress concrete pipe pile horizontal stress - Google Patents
Method for detecting prestress concrete pipe pile horizontal stress Download PDFInfo
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- CN103362151B CN103362151B CN201310326927.XA CN201310326927A CN103362151B CN 103362151 B CN103362151 B CN 103362151B CN 201310326927 A CN201310326927 A CN 201310326927A CN 103362151 B CN103362151 B CN 103362151B
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Abstract
The invention discloses a method for detecting the prestress concrete pipe pile horizontal stress and belongs to the filed of foundation. The method comprises the following steps that a steel bar framework of a prestress concrete pipe pile is manufactured; a concrete prestress sensor precast block is manufactured; the middle part of the steel bar framework is provided with a support element vertical to a vertical shaft of the steel bar framework; the concrete prestress sensor precast block is placed in a sealed box body; concrete is cast into the steel bar framework and is respectively cast to the top and the bottom of the support element, and the prestress concrete pipe pile of a pre-buried concrete prestress sensor is placed in a high-temperature and high-pressure autoclave for maintenance; and the stress of the prestress concrete pipe pile is detected. The method has the advantages that the problem that the concrete prestress sensor cannot be pre-buried in the concrete pipe pile in the prior art is solved, the detection efficiency is accelerated, and the detection precision is improved.
Description
Technical field
The present invention relates to a kind of method detecting prestressed concrete pipe pile horizontal stress, belong to foundation field.
Background technology
Along with the development of building, features such as prestressed concrete pipe pile is high with its bearing capacity of single pile, bending resistance crack resistance is good, meet environmental requirement, the pile duration is short, low cost and being applied more and more widely.Horizontal static loading experiment is that the level bearing performance measuring prestressed concrete pipe pile provides the method for testing that a method is set up, theory is ripe, but because the manufacturing process of prestressed concrete pipe pile often will through HTHP maintenance, so strain gauge can only be installed after pile, this is that construction and measurement bring much inconvenience.
Summary of the invention
The present invention has designed and developed a kind of method detecting prestressed concrete pipe pile horizontal stress.Solve concrete stress sensor and cannot be embedded in problem in prestressed concrete pipe pile, improve the efficiency and accuracy that detect prestressed concrete pipe pile horizontal stress.
Technical scheme provided by the invention is:
Detect a method for prestressed concrete pipe pile horizontal stress, comprising:
The cage of reinforcement of step 1, making prestressed concrete pipe pile;
Step 2, making concrete stress inductor prefabricated section, the preparation method of described concrete stress inductor prefabricated section is: arrange prefabricated section mould, described prefabricated section mould is discoid, the thickness of described prefabricated section mould is 20cm, the chip section of concrete stress inductor be placed in described prefabricated section mould, the test section of described concrete stress inductor is exposed to the outside of described prefabricated section mould, concrete perfusion in described prefabricated section mould, leave standstill 3h, remove prefabricated section mould;
Step 3, in described cage of reinforcement, be provided with the support member vertical with the vertical axes of described cage of reinforcement, described support member comprises support and sealing box body, described sealing box body is fixed on described mid-stent, described support is positioned at described cage of reinforcement 1/3 place, described support welds with described cage of reinforcement, and described sealing box body is made up of heat insulation pressure-resistant material;
Step 4, described concrete stress inductor prefabricated section are placed in described sealing box body, and the test section of described concrete stress inductor passes the sidewall of described sealing box body, are describedly filled with elastomeric material in sealing box body inside;
Step 5, to described cage of reinforcement placing of concrete, to top and the bottom placing of concrete respectively of described support member, prepare the prestressed concrete pipe pile of pre-buried concrete stress inductor, the prestressed concrete pipe pile of pre-buried concrete stress inductor to be placed in high temperature and high pressure kettle maintenance 3 days, the temperature of wherein said high pressure-temperature still is 100 DEG C of pressure is 6 atmospheric pressure;
Step 6, adopt static pressure method by the prestressed concrete pipe pile of pre-buried concrete stress inductor press-in soil in 1/2, it is the prestressed concrete pipe pile applying horizontal thrust being embedded with concrete stress inductor with jack, described concrete stress inductor and described jack are all electrically connected with control device, the data of concrete stress inductor transmission described in wherein said control device process and the thrust loading sequence of the described jack of regulation and control, often add one-level thrust, the STRESS VARIATION situation of the prestressed concrete pipe pile of pre-buried concrete stress inductor recorded by described control device, described control device is provided with the maximum thrust of jack, described maximum thrust is 150KN.
Preferably, in the method for described detection prestressed concrete pipe pile horizontal stress, in described step 2, make concrete stress inductor prefabricated section concrete used identical with the described cage of reinforcement of pouring concrete used model.
Preferably, in the method for described detection prestressed concrete pipe pile horizontal stress, in described step 5, cage of reinforcement and described support member described in the concrete casting of employing same model.
Preferably, in the method for described detection prestressed concrete pipe pile horizontal stress, the top of support member described in described step 5 and the thickness of bottom placing of concrete are 9cm.
Preferably, in the method for described detection prestressed concrete pipe pile horizontal stress, control device described in described step 6 regulates and controls the every 5min of described jack and strengthens one-level thrust.
Preferably, in the method for described detection prestressed concrete pipe pile horizontal stress, described control device regulates and controls the every 5min of described jack and strengthens one-level thrust, and every one-level thrust is 15KN.
The present invention devises a kind of method detecting prestressed concrete pipe pile horizontal stress.Support member is made up of support and sealing box body in the present invention, sealing box body is made up of heat insulation pressure-resistant material, ensure that and be placed on concrete stress sensor in sealing box body at prestressed concrete pipe pile in high temperature and high pressure kettle during maintenance, be not destroyed, the elastomeric material of simultaneously filling in sealing box body, can when prestressed concrete pipe pile pile sinking, prevent concrete stress sensor damaged owing to excessively shaking, concrete stress inductor prefabricated section fixing concrete strain gauge, and protect the chip of concrete stress device; Present invention employs unidirectional multi cycle simultaneously and add unloading method, controller is provided with jack thrust loading sequence, improve the accuracy of detection.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail, can implement according to this with reference to manual word to make those skilled in the art.
As shown in Figure 1, a kind of method detecting prestressed concrete pipe pile horizontal stress, comprising:
The cage of reinforcement of step 1, making prestressed concrete pipe pile;
Step 2, making concrete stress inductor prefabricated section, the preparation method of described concrete stress inductor prefabricated section is: arrange prefabricated section mould, described prefabricated section mould is discoid, the thickness of described prefabricated section mould is 20cm, the chip section of concrete stress inductor be placed in described prefabricated section mould, the test section of described concrete stress inductor is exposed to the outside of described prefabricated section mould, concrete perfusion in described prefabricated section mould, leave standstill 3h, remove prefabricated section mould;
Step 3, in described cage of reinforcement, be provided with the support member vertical with the vertical axes of described cage of reinforcement, described support member comprises support and sealing box body, described sealing box body is fixed on described mid-stent, described support is positioned at described cage of reinforcement 1/3 place, described support welds with described cage of reinforcement, and described sealing box body is made up of heat insulation pressure-resistant material;
Step 4, described concrete stress inductor prefabricated section are placed in described sealing box body, and the test section of described concrete stress inductor passes the sidewall of described sealing box body, are describedly filled with elastomeric material in sealing box body inside;
Step 5, to described cage of reinforcement placing of concrete, to the top of described support member and bottom, ponding depths is 9cm layer of concrete respectively, prepare the prestressed concrete pipe pile of pre-buried concrete stress inductor, the prestressed concrete pipe pile of pre-buried concrete stress inductor to be placed in high temperature and high pressure kettle maintenance 3 days, the temperature of wherein said high pressure-temperature still is 100 DEG C of pressure is 6 atmospheric pressure
Wherein, concrete stress inductor prefabricated section concrete used is made identical with the described cage of reinforcement of pouring concrete used model, cage of reinforcement and described support member described in the concrete casting of employing same model;
Step 6, adopt static pressure method by the prestressed concrete pipe pile of the pre-buried concrete stress inductor after the maintenance of step 5 HTHP press-in soil in 1/2, horizontal thrust is applied with the prestressed concrete pipe pile that jack is concrete stress inductor, described concrete stress inductor and described jack are all electrically connected with control device, the data of concrete stress inductor transmission described in wherein said control device process and the thrust loading sequence of the described jack of regulation and control, what adopt in the present embodiment is that unidirectional multi cycle adds unloading method, is specially:
Every 5min strengthens one-level thrust, and every one-level thrust is 15KN, and maximum thrust is 150KN, records the STRESS VARIATION situation of the prestressed concrete pipe pile of pre-buried concrete stress inductor.
The present invention devises a kind of method detecting prestressed concrete pipe pile horizontal stress.Support member is made up of support and sealing box body in the present invention, sealing box body is made up of heat insulation pressure-resistant material, ensure that and be placed on concrete stress sensor in sealing box body at prestressed concrete pipe pile in high temperature and high pressure kettle during maintenance, be not destroyed, the elastomeric material of simultaneously filling in sealing box body, can when prestressed concrete pipe pile pile sinking, prevent concrete stress sensor damaged owing to excessively shaking, concrete stress inductor prefabricated section fixing concrete strain gauge, and protect the chip of concrete stress device; Present invention employs unidirectional multi cycle simultaneously and add unloading method, controller is provided with jack thrust loading sequence, improve the accuracy of detection.
Although embodiment of the present invention are open as above, but it is not restricted to listed in manual and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.
Claims (6)
1. detect a method for prestressed concrete pipe pile horizontal stress, it is characterized in that, comprising:
The cage of reinforcement of step 1, making prestressed concrete pipe pile;
Step 2, making concrete stress inductor prefabricated section, the preparation method of described concrete stress inductor prefabricated section is: arrange prefabricated section mould, described prefabricated section mould is discoid, the thickness of described prefabricated section mould is 20cm, the chip section of concrete stress inductor be placed in described prefabricated section mould, the test section of described concrete stress inductor is exposed to the outside of described prefabricated section mould, concrete perfusion in described prefabricated section mould, leave standstill 3h, remove prefabricated section mould;
Step 3, in described cage of reinforcement, be provided with the support member vertical with the vertical axes of described cage of reinforcement, described support member comprises support and sealing box body, described sealing box body is fixed on described mid-stent, described support is positioned at described cage of reinforcement 1/3 place, described support welds with described cage of reinforcement, and described sealing box body is made up of heat insulation pressure-resistant material;
Step 4, described concrete stress inductor prefabricated section are placed in described sealing box body, and the test section of described concrete stress inductor passes the sidewall of described sealing box body, are describedly filled with elastomeric material in sealing box body inside;
Step 5, to described cage of reinforcement placing of concrete, to top and the bottom placing of concrete respectively of described support member, prepare the prestressed concrete pipe pile of pre-buried concrete stress inductor, the prestressed concrete pipe pile of pre-buried concrete stress inductor to be placed in high temperature and high pressure kettle maintenance 3 days, the temperature of wherein said high pressure-temperature still is 100 DEG C of pressure is 6 atmospheric pressure;
Step 6, adopt static pressure method by the prestressed concrete pipe pile of pre-buried concrete stress inductor press-in soil in 1/2, it is the prestressed concrete pipe pile applying horizontal thrust being embedded with concrete stress inductor with jack, described concrete stress inductor and described jack are all electrically connected with control device, the data of concrete stress inductor transmission described in wherein said control device process and the thrust loading sequence of the described jack of regulation and control, often add one-level thrust, the STRESS VARIATION situation of the prestressed concrete pipe pile of pre-buried concrete stress inductor recorded by described control device, described control device is provided with the maximum thrust of jack, described maximum thrust is 150KN.
2. the method detecting prestressed concrete pipe pile horizontal stress as claimed in claim 1, is characterized in that, in described step 2, makes concrete stress inductor prefabricated section concrete used identical with the described cage of reinforcement of pouring concrete used model.
3. the method detecting prestressed concrete pipe pile horizontal stress as claimed in claim 2, is characterized in that, in described step 5, and cage of reinforcement and described support member described in the concrete casting of employing same model.
4. the method detecting prestressed concrete pipe pile horizontal stress as claimed in claim 3, it is characterized in that, the top of support member described in described step 5 and the thickness of bottom placing of concrete are 9cm.
5. the method detecting prestressed concrete pipe pile horizontal stress as claimed in claim 4, is characterized in that, control device described in described step 6 regulates and controls the every 5min of described jack and strengthens one-level thrust.
6. the method detecting prestressed concrete pipe pile horizontal stress as claimed in claim 5, is characterized in that, described control device regulates and controls the every 5min of described jack and strengthens one-level thrust, and every one-level thrust is 15KN.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310326927.XA CN103362151B (en) | 2013-07-30 | 2013-07-30 | Method for detecting prestress concrete pipe pile horizontal stress |
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| CN201310326927.XA CN103362151B (en) | 2013-07-30 | 2013-07-30 | Method for detecting prestress concrete pipe pile horizontal stress |
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| CN103362151B true CN103362151B (en) | 2015-02-18 |
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| CN103882894B (en) * | 2014-04-10 | 2016-02-03 | 山东电力工程咨询院有限公司 | Prestressed concrete pipe pile horizontal bearing characteristic test model and test method |
| CN107152040B (en) * | 2017-05-17 | 2019-10-18 | 吉林建筑大学 | Demifacet stake mini Mod experiment loading unit under horizontal and vertical load collective effect |
| CN116001080B (en) * | 2023-02-20 | 2023-09-08 | 连云港先至远大建筑工业有限公司 | Prefabricated pc component production device and method with automatic quality inspection function |
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| JP3599522B2 (en) * | 1997-02-26 | 2004-12-08 | 株式会社ジオトップ | Damage detection method for piles and underground piles that can detect damage |
| SG102542A1 (en) * | 1998-12-22 | 2004-03-26 | Tjhing Bo Robert Oei | Piling system with continuous load measurement |
| JP4847107B2 (en) * | 2005-11-21 | 2011-12-28 | ジャパンパイル株式会社 | Pile dynamic horizontal loading test method and dynamic horizontal loading test device |
| CN201671118U (en) * | 2010-05-26 | 2010-12-15 | 山西潞安矿业(集团)有限责任公司 | Prestressed concrete tubular pile strain tester |
| CN102011415A (en) * | 2010-10-26 | 2011-04-13 | 珠海市建设工程质量监督检测站 | Method and device for detecting strain/stress of pile body by prestress pipe file field static load test |
| CN102127917A (en) * | 2010-12-03 | 2011-07-20 | 中国民航大学 | Low-strain testing device for detecting integrity of ultralong bored concrete pile |
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Effective date of registration: 20220112 Address after: 061001 No. 28, Yuhe Road, Yunhe District, Cangzhou City, Hebei Province Patentee after: Chemical industry first survey and Design Institute Co.,Ltd. Address before: 061001 No. 28, Yuhe Road, Yunhe District, Cangzhou City, Hebei Province Patentee before: CHINA CHEMICAL ENGINEERING FIRST GEOTECHNICAL ENGINEERING Corp.,Ltd. |
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