CN204825999U - Vertical resistance to plucking static test device of single pile - Google Patents
Vertical resistance to plucking static test device of single pile Download PDFInfo
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- CN204825999U CN204825999U CN201520444757.XU CN201520444757U CN204825999U CN 204825999 U CN204825999 U CN 204825999U CN 201520444757 U CN201520444757 U CN 201520444757U CN 204825999 U CN204825999 U CN 204825999U
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Abstract
The utility model belongs to the technical field of the civil construction, a vertical resistance to plucking static test device of single pile is related to. The device includes: counter -force platform, girder steel, lower part counter -force device, jack, upper portion counter -force device, test pile, dowel steel, operation process has: build the counter -force platform, furnish the girder steel, place upper portion counter -force device, install the jack, place lower part counter -force device, the counter -force device is connected with the reinforcing bar of test pile, upper and lower counter -force device is connected, starts the jack, upper portion counter -force device drives lower part counter -force device, measures the vertical resistance to plucking data of stake. The utility model discloses easy and simple to handle, the installation is simple feasible, and the cost is less, has reduced welded instability, can guarantee reinforcing bar the force balance in the process of the test, has eliminated the frictional force that produces between resistance to plucking reinforcing bar and the girder steel, ensures the error of experimental loading observed value and effective value, can obtain accurate up -pull displacement volume and each mechanics parameter.
Description
Technical field
The utility model belongs to technical field of civil, relates to a kind of unit for single-pile vertical anti-pulling static-load testing device.
Background technology
Static load test be detection foundation pile vertical compression (pulling out) bearing capacity of generally acknowledging at present the most directly, the most reliable test method.But find in engineering practice, the device form of pile measurement is varied, these needs just needing us to explore and study a kind of applicable device to detect to meet us, so that the process safety ensureing to detect, accurate, practical.
Pile measurement is mainly divided into three kinds: one to be the static-loading test of stake; Two is vertically pulling-resistant static loading tests of stake; Three is horizontally loading test of stake.
The uplift resistance of uplift pile mainly comes stressed by the frictional force of pile body and soil layer, to resist the stake of axial tension, as: anchoring pile, anti-floating pile etc.The stake of bearing vertically pulling-resistant power is called uplift pile, and uplift pile is widely used in the rock anchorage base etc. in the rock anchorage base of basement anti-floating, towering building resistance to plucking, tidal quay platform resistance to plucking, suspension bridge and cable stayed bridge, the pile foundation of Large Ship Dock base plate, electric power conveying tower and dead load test pile.In the area that groundwater table is higher, when superstructure loading can not balance buoyancy force of underground water time, the entirety of structure or local will be subject to the effect of upward force, as: the basement structure of underground tank, building, the biochemistry pool etc. of Wastewater Treatment Plant must arrange uplift pile.
The accuracy of loading test result and authenticity, have decisive meaning for engineering detecting, for the pile foundation inspection method bearing vertically pulling-resistant power.At present, have direct method and indirect method, and static loading test be the most effectively, the most direct way.
Vertically pulling-resistant experimental rig, the reasonability of design and the accurate of installation, all play conclusive effect to the authenticity of testing result and accuracy.The complexity that counterforce device is installed, directly affects the cost of engineering.For vertically pulling-resistant stake provides the method for counter-force to mainly contain: anchored pile-testing method, retouch method and load Force Method is born on ground.Anchored pile-testing method cost is high, and whether require same higher to anchoring pile on same straight line with test pile, deviation is excessive, and test just cannot normally be carried out; Earth anchor method cost is higher, need adopt machinery or manually be screwed in soil by earth anchor, and installation strength is large, installs complicated, and earth anchor easily produce in process of the test excessive on the amount of pulling out, normally carrying out of impact test; Load Force Method is born on ground, uses easier.
Utility model content
The purpose of this utility model is to provide unit for single-pile vertical anti-pulling static-load testing device, in foundation pile vertically pulling-resistant static loading test, and the problems such as the load distortion that the connected mode between solution uplift pile and counterforce device causes and the unstability that reinforcement welding causes.
The technical solution of the utility model is:
A kind of unit for single-pile vertical anti-pulling static-load testing device, this device comprises: counter-force platform, girder steel, bottom counterforce device, jack, top counterforce device, test pile, dowel bar, and concrete structure is as follows:
Girder steel two ends are arranged on counter-force platform, the bottom of girder steel arranges bottom counterforce device, the top of girder steel arranges top counterforce device, and top counterforce device and bottom counterforce device are connected and fixed by matching used dowel bar and bolt, and dowel bar lays respectively at girder steel both sides; Bottom counterforce device is positioned at test pile top, arranges jack bottom the counterforce device of top and between girder steel.
Described unit for single-pile vertical anti-pulling static-load testing device, the reinforcing bar at test pile top is through bottom counterforce device, and reinforcing bar and the bottom counterforce device at this test pile top are bolted, and jack top and top counterforce device are bolted.
Described unit for single-pile vertical anti-pulling static-load testing device, the width of dowel bar and girder steel both sides is 5cm ~ 8cm, bottom counterforce device upper surface is 10cm ~ 20cm to the soffit clear distance of girder steel, and top counterforce device soffit is 35cm ~ 40cm to the upper surface distance of girder steel.
Described unit for single-pile vertical anti-pulling static-load testing device, when the pile body reinforcing bar of test pile is connected with bottom counterforce device, the pile body bar bending angle of test pile is 1 ~ 5 degree.
Described unit for single-pile vertical anti-pulling static-load testing device, the height that test pile bassets, controls at 20 ~ 25cm, and the height of test pile free segment reinforcing bar, controls at 15cm ~ 20cm, and counter-force platform courses is at 50cm ~ 70cm.
Described unit for single-pile vertical anti-pulling static-load testing device, jack is placed on the centre of girder steel, and the central point of top counterforce device and bottom counterforce device, the central point of jack and test pile are on the same axis.
Described unit for single-pile vertical anti-pulling static-load testing device, the Breadth Maximum of girder steel, is not more than the minimum widith of top counterforce device and bottom counterforce device.
The operating process of the utility model unit for single-pile vertical anti-pulling static-load testing device comprises: build counter-force platform, place bottom counterforce device, the bar connecting of bottom counterforce device and test pile, furnish girder steel, install jack, top counterforce device is connected with bottom counterforce device, start jack, top counterforce device drives bottom counterforce device, carry out test operation, measure the vertically pulling-resistant data of test pile.Describedly build counter-force platform, according to the size selection material of trial load, set up counter-force platform, ensure the intensity of ground counter-force platform, the length of counter-force platform and width.Site condition, dowel bar requirement of strength must meet load.Described ornaments girder steel, the size according to trial load selects girder steel, and the Breadth Maximum of girder steel, is not more than the minimum widith of counterforce device (top counterforce device and bottom counterforce device).Described installing jack, top counterforce device is positioned over the top of jack, the point coincides of each of test pile, bottom counterforce device, girder steel, jack, top counterforce device etc.
In measuring process, start jack, top counterforce device drives bottom counterforce device, measures the vertically pulling-resistant data of test pile, operation jack, jack stand top counterforce device, top counterforce device drives bottom counterforce device by dowel bar, the reinforcing bar of bottom counterforce device motoring ring test stake, reach the vertically pulling-resistant effect of test pile, measure the vertically pulling-resistant data of test pile, judge according to result of the test, unit for single-pile vertical anti-pulling ability performance.
Advantage of the present utility model and beneficial effect are:
1, the utility model unit for single-pile vertical anti-pulling static-load testing device, by building counter-force platform, ornaments girder steel, place top counterforce device, installing jack, place that bottom counterforce device, counterforce device carry out with the reinforcing bar of test pile being connected, upper and lower counterforce device carries out connecting, starting jack, top counterforce device drives bottom counterforce device, can measure the vertically pulling-resistant data of stake.Therefore, the utility model installation process is simple, eliminate the process of welding, decrease the unstability of welding, improve the stability of test, testing expenses are relatively low, and cost is less, can ensure that in process of the test pile body reinforcing steel bar bear balances, and eliminates the frictional force produced between anti-punching shear bar and girder steel.Reinforcing bar bears relatively average uplift force, by selecting suitable bottom stressing device, avoid and pull out that pile body bar bending is excessive causes drawing crack pile concrete upper, guarantee to test the error loading observation and actual value, uplift displacement amount and various mechanics parameter accurately can be obtained.
2, the utility model is applicable to the pile foundation such as anchoring pile of the uplift pile of deep foundation ditch, underground tank uplift pile, the basement uplift pile of building, towering building uplift pile, static loading test.Compare with similar pullout tests, have that stability is strong, safety is high, simple to operate and to features such as place strong adaptabilities.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of top counterforce device.
Fig. 3 is the structural representation of bottom counterforce device.
In figure, 1 counter-force platform; 2 girder steels; 3 bottom counterforce devices; 4 jack; 5 top counterforce devices; 6 test piles; 7 dowel bars; 8 bolts.
Detailed description of the invention
Below, with specific embodiment, utility model is made by reference to the accompanying drawings and describing in detail further.
As shown in Figure 1 to Figure 3, the utility model unit for single-pile vertical anti-pulling static-load testing device, mainly comprises: counter-force platform 1, girder steel 2, bottom counterforce device 3, jack 4, top counterforce device 5, test pile 6, dowel bar 7, bolt 8 etc., and concrete structure is as follows:
Girder steel 2 two ends are arranged on counter-force platform 1, the bottom of girder steel 2 arranges bottom counterforce device 3, the top of girder steel 2 arranges top counterforce device 5, and top counterforce device 5 and bottom counterforce device 3 are connected and fixed by matching used dowel bar 7 and bolt 8, and dowel bar 7 lays respectively at girder steel 2 both sides.Bottom counterforce device 3 is positioned at test pile 6 top, and the reinforcing bar at test pile 6 top is through bottom counterforce device 3, and the reinforcing bar at this test pile 6 top is connected by bolt 8 with bottom counterforce device 3.Arrange jack 4 bottom top counterforce device 5 and between girder steel 2, jack 4 top is connected by bolt 8 with top counterforce device 5.
As shown in Figure 2, the utility model top counterforce device 5 is platy structure, in the middle part of this platy structure, be evenly equipped with bolt 8 with both sides, and top counterforce device 5 is connected and fixed by bolt 8 and dowel bar 7.As shown in Figure 3, the utility model bottom counterforce device 3 is platy structure, in the middle part of this platy structure, be evenly equipped with bolt 8 with both sides, and bottom counterforce device 3 is connected and fixed by bolt 8 and dowel bar 7.Wherein, bolt 8 plays the effect of the spacing fixing and limit counterforce device (top counterforce device 5 and bottom counterforce device 3) and dowel bar 7.
Dowel bar 7 is 5cm ~ 8cm with the width of girder steel 2 both sides, and bottom counterforce device 3 upper surface is 10cm ~ 20cm to the soffit clear distance of girder steel 2, and top counterforce device 5 soffit is 35cm ~ 40cm to the upper surface distance of girder steel 2.Wherein, bottom counterforce device 3, according to the stake footpath size of test pile, selects bottom counterforce device specification; According to load, select the specification of dowel bar.When the pile body reinforcing bar of test pile is connected with bottom counterforce device 3, the pile body bar bending angle of test pile is 1 ~ 5 degree.The height that test pile 6 bassets, controls at 20 ~ 25cm, and the height of test pile 6 free segment reinforcing bar, control at 15cm ~ 20cm, counter-force platform 1 controls at 50cm ~ 70cm.
As shown in Figure 1, the making and use method of the utility model unit for single-pile vertical anti-pulling static-load testing device is specific as follows:
Build counter-force platform 1, according to the position of size determination counter-force platform 1 choosing girder steel 2, the bar connecting of bottom counterforce device 3 and test pile 6 with bolt 8 fixing (according to the stake footpath size of test pile, being selected in the specification of bottom counterforce device 3 internal diameter).Ornaments girder steel 2, according to the size of trial load, select girder steel 2, the Breadth Maximum of girder steel 2, is not more than the minimum widith of bottom counterforce device 3.Installing jack 4, installs top counterforce device 5, and top counterforce device 5 and bottom counterforce device 3 are connected by dowel bar 7 and use bolt 8 fixing (specification of dowel bar 7, the load capacity size according to static loading test is determined).Guarantee that bottom counterforce device 3, top counterforce device 5 and jack 4 are placed on the centre of girder steel 2, on the same axis, load test is detected by auto-loading system input detected parameters for the central point of girder steel 2 central point, jack 4 and test pile 6.In testing process, top counterforce device 5 drives bottom counterforce device 3, and bottom counterforce device 3 motoring ring test stake 6 reaches the vertically pulling-resistant effect of test pile, measures the vertically pulling-resistant data of stake.
Result of implementation shows, the utility model adopts ground loading lotus Force Method, and installing/dismounting is easy, decreases the inconvenience and unstability of welding and bringing.Be applicable to the foundation pile in different type pile piles with different footpath, avoid the bent angle of change of pile body longitudinal reinforcement, ensure that accuracy and the test pile integrity of trial load.
Claims (7)
1. a unit for single-pile vertical anti-pulling static-load testing device, is characterized in that, this device comprises: counter-force platform, girder steel, bottom counterforce device, jack, top counterforce device, test pile, dowel bar, and concrete structure is as follows:
Girder steel two ends are arranged on counter-force platform, the bottom of girder steel arranges bottom counterforce device, the top of girder steel arranges top counterforce device, and top counterforce device and bottom counterforce device are connected and fixed by matching used dowel bar and bolt, and dowel bar lays respectively at girder steel both sides; Bottom counterforce device is positioned at test pile top, arranges jack bottom the counterforce device of top and between girder steel;
Top counterforce device is platy structure, and in the middle part of this platy structure, be evenly equipped with bolt with both sides, top counterforce device is connected and fixed by bolt and dowel bar; Bottom counterforce device is platy structure, and in the middle part of this platy structure, be evenly equipped with bolt with both sides, bottom counterforce device is connected and fixed by bolt and dowel bar.
2. according to unit for single-pile vertical anti-pulling static-load testing device according to claim 1, it is characterized in that, the reinforcing bar at test pile top is through bottom counterforce device, and reinforcing bar and the bottom counterforce device at this test pile top are bolted, and jack top and top counterforce device are bolted.
3. according to unit for single-pile vertical anti-pulling static-load testing device according to claim 1, it is characterized in that, the width of dowel bar and girder steel both sides is 5cm ~ 8cm, bottom counterforce device upper surface is 10cm ~ 20cm to the soffit clear distance of girder steel, and top counterforce device soffit is 35cm ~ 40cm to the upper surface distance of girder steel.
4. according to unit for single-pile vertical anti-pulling static-load testing device according to claim 1, it is characterized in that, when the pile body reinforcing bar of test pile is connected with bottom counterforce device, the pile body bar bending angle of test pile is 1 ~ 5 degree.
5. according to unit for single-pile vertical anti-pulling static-load testing device according to claim 1, it is characterized in that, the height that test pile bassets, control at 20 ~ 25cm, the height of test pile free segment reinforcing bar, controls at 15cm ~ 20cm, and counter-force platform courses is at 50cm ~ 70cm.
6. according to unit for single-pile vertical anti-pulling static-load testing device according to claim 1, it is characterized in that, jack is placed on the centre of girder steel, and the central point of top counterforce device and bottom counterforce device, the central point of jack and test pile are on the same axis.
7. according to unit for single-pile vertical anti-pulling static-load testing device according to claim 1, it is characterized in that, the Breadth Maximum of girder steel, be not more than the minimum widith of top counterforce device and bottom counterforce device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520444757.XU CN204825999U (en) | 2015-06-25 | 2015-06-25 | Vertical resistance to plucking static test device of single pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520444757.XU CN204825999U (en) | 2015-06-25 | 2015-06-25 | Vertical resistance to plucking static test device of single pile |
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| CN204825999U true CN204825999U (en) | 2015-12-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105651604A (en) * | 2015-12-30 | 2016-06-08 | 中冶沈勘工程技术有限公司 | Experimental device and experimental method for simulating anti-floating anchor-concrete plate composite structure |
| CN109667293A (en) * | 2019-01-21 | 2019-04-23 | 南京市建筑安装工程质量检测中心 | The anchor connection method anti-pulling device of unit for single-pile vertical anti-pulling static test |
| CN111236328A (en) * | 2020-01-17 | 2020-06-05 | 武汉建诚工程技术有限公司 | Tubular pile pulling resistance detection device and detection method |
| CN111764445A (en) * | 2020-07-03 | 2020-10-13 | 浙江大港桥梁科学研究有限公司 | Counterforce device for pile foundation uplift static load test |
-
2015
- 2015-06-25 CN CN201520444757.XU patent/CN204825999U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105651604A (en) * | 2015-12-30 | 2016-06-08 | 中冶沈勘工程技术有限公司 | Experimental device and experimental method for simulating anti-floating anchor-concrete plate composite structure |
| CN105651604B (en) * | 2015-12-30 | 2018-03-06 | 中冶沈勘工程技术有限公司 | Simulate the experimental rig and test method of anti-float anchor rod concrete slab combining structure |
| CN109667293A (en) * | 2019-01-21 | 2019-04-23 | 南京市建筑安装工程质量检测中心 | The anchor connection method anti-pulling device of unit for single-pile vertical anti-pulling static test |
| CN109667293B (en) * | 2019-01-21 | 2019-08-13 | 南京市建筑安装工程质量检测中心 | The anchor connection method anti-pulling device of unit for single-pile vertical anti-pulling static test |
| CN111236328A (en) * | 2020-01-17 | 2020-06-05 | 武汉建诚工程技术有限公司 | Tubular pile pulling resistance detection device and detection method |
| CN111764445A (en) * | 2020-07-03 | 2020-10-13 | 浙江大港桥梁科学研究有限公司 | Counterforce device for pile foundation uplift static load test |
| CN111764445B (en) * | 2020-07-03 | 2021-09-03 | 浙江大港桥梁科学研究有限公司 | Counterforce device for pile foundation uplift static load test |
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Address after: 110000 No. 7 Youth North Street, Shenhe District, Shenyang City, Liaoning Province Patentee after: Liaoning Nonferrous Exploration Research Institute Co., Ltd. Address before: 110013 Liaoning City, Shenyang Province Youth Street, Shenhe District, No. 7 Patentee before: The coloured complex investigation institute in Liaoning |