CN207974164U - A kind of pile foundation level loading test device - Google Patents
A kind of pile foundation level loading test device Download PDFInfo
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- CN207974164U CN207974164U CN201820105018.1U CN201820105018U CN207974164U CN 207974164 U CN207974164 U CN 207974164U CN 201820105018 U CN201820105018 U CN 201820105018U CN 207974164 U CN207974164 U CN 207974164U
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- pile
- cushion cap
- reaction beam
- test device
- test
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Abstract
The utility model provides a kind of pile foundation level loading test device, including：Foundation trench, test pile, reaction beam and jack.Wherein, the inside of foundation trench is equipped with support pile, the lower end of test pile is embedded in the lower section of the bottom surface of foundation trench, the upper end of test pile exposes to the bottom surface of foundation trench, and the upper end of test pile is connected with cushion cap, and the displacement detecting instrument of the displacement for measuring cushion cap is connected on cushion cap, reaction beam is fixed in support pile, one end of jack is resisted against reaction beam, and the other end of jack holds out against the branch in cushion cap to side in the horizontal direction.The detection to test pile horizontal bearing capacity can be fast implemented using the pile foundation level loading test device in the utility model, enough horizontal reacting forces are provided, avoid to provide the reaction beam of large-size specification when applying greater level bearing capacity to test pile, it is consistent with actual condition that guarantee test stake horizontal bearing capacity detects operating mode, while test pile being avoided when applying greater level bearing capacity to fracture and breakage.
Description
Technical field
The utility model is related to the realm of building construction more particularly to a kind of pile foundation level loading test devices.
Background technology
Currently, the usual way of building field pile foundation level loading test is to apply horizontal force, the back of the body using jack
Portion is provided with the horizontal dead load detection of counterforce structure progress single pile that can provide enough horizontal forces, and such detection method is generally fitted
The situation smaller for detecting horizontal bearing capacity of single pile；But when larger for detection level bearing capacity, apply due to jack
Horizontal force is big, and the contact area of jack and single pile is small and the factors such as the horizontal bearing capacity bigger of bearing the counterforce structure of counter-force
It influences, causes to provide the increasing of the design parameters such as diameter, arrangement of reinforcement, the length of horizontal bearing capacity of single pile counterforce structure, expend big；Simultaneously
When single pile bears greater level bearing capacity, fractureing easily occurs in the free end portion of single pile, damaged phenomenon, and detection is caused to test
Failure, it is little to the testing inspection reference value for simulating practical clump of piles stress.
Utility model content
In view of the foregoing, the utility model provides a kind of pile foundation level loading test device.By by reaction beam
It is fixed on support pile, it is possible to provide larger opposition, to avoid when applying greater level bearing capacity to test pile
The dimensions of reaction beam need to be increased.
To realize above-mentioned technique effect, the utility model discloses a kind of pile foundation level loading test devices, including：
The inside of foundation trench, the foundation trench is equipped with support pile；
Test pile, the lower end of the test pile are embedded in the lower section of the bottom surface of the foundation trench, outside the upper end of the test pile
It is exposed to the bottom surface of the foundation trench, and the upper end of the test pile is connected with cushion cap, is connected on the cushion cap described for measuring
The displacement detecting instrument of the displacement of cushion cap；
Reaction beam, the reaction beam are fixed in the support pile；And
One end of jack, the jack is resisted against the reaction beam, and the other end of the jack is in the horizontal direction
The branch held out against in the cushion cap supports side.
The beneficial effects of the utility model are：
1. can avoid the increase for leading to reaction beam dimensions due to the increase of the horizontal bearing capacity of application, it is ensured that experiment
The detection operating mode of stake is consistent with actual condition；
2. larger horizontal bearing capacity can be applied to test pile；
3. the shift value of cushion cap in pile foundation level loading test can be accurately measured.
A kind of pile foundation level loading test device of the utility model further improvement lies in that, in the foundation trench interval set
There are multiple test piles.
A kind of pile foundation level loading test device of the utility model further improvement lies in that, the cushion cap and the examination
It is concrete structure to test stake, and the cushion cap is consistent with the strength grade of the test pile.
A kind of pile foundation level loading test device of the utility model further improvement lies in that, the test pile includes anchor
Enter the bar planting of the cushion cap.
A kind of pile foundation level loading test device of the utility model further improvement lies in that, the lower end of the reaction beam
It is embedded in the lower section of the bottom surface of the foundation trench, and the reaction beam is fixed in the support pile by armored concrete.
A kind of pile foundation level loading test device of the utility model further improvement lies in that, on the bottom surface of the foundation trench
Equipped with pedestal, and the cushion cap is supported on the pedestal.
A kind of pile foundation level loading test device of the utility model further improvement lies in that, the cushion cap include interval
The first transverse steel and spaced first longitudinal direction reinforcing bar being arranged.
A kind of pile foundation level loading test device of the utility model further improvement lies in that：Between the reaction beam includes
The second transverse steel every setting and spaced second longitudinal direction reinforcing bar.
A kind of pile foundation level loading test device of the utility model further improvement lies in that, the reaction beam be coagulation
Soil structure, and the strength grade of the reaction beam is greater than or equal to the strength grade of C30 concrete structures.
A kind of pile foundation level loading test device of the utility model further improvement lies in that, the displacement detecting instrument is
Digital display centimeter, the gauge head of the digital display centimeter are support on and the branch of the cushion cap side that support side adjacent；The foundation trench
The holder for installing the digital display centimeter is provided on bottom surface.
Description of the drawings
Fig. 1 is a kind of agent structure schematic diagram of pile foundation level loading test device of the utility model.
Fig. 2 is the connection signal between cushion cap and support pile in a kind of pile foundation level loading test device of the utility model
Figure.
Fig. 3 is that the connection in a kind of pile foundation level loading test device of the utility model between support pile and reaction beam is shown
It is intended to.
Specific implementation mode
For the benefit of to the understanding of the utility model, illustrate with reference to the accompanying drawings and embodiments.
Refering to fig. 1 it is found that the utility model provides a kind of pile foundation level loading test device, including foundation trench 1, test pile
2, reaction beam 4 and jack 5；Wherein, the inside of foundation trench 1 is equipped with support pile 11, and the lower end of test pile 2 is embedded in the bottom of foundation trench 1
The lower section in face, the upper end of test pile 2 exposes to the bottom surface of foundation trench 1, and the upper end of test pile 2 is connected with cushion cap 3, connects on cushion cap 3
It is connected to the displacement detecting instrument of the displacement for measuring cushion cap 3, reaction beam 4 is fixed in support pile 11, and one end of jack 5 is supported
The branch in cushion cap 3 is held out against in the horizontal direction to side (being not marked in figure) in the other end of reaction beam 4, jack 5.The present embodiment
In, by using support pile 11, and combine the support pile 11 of foundation trench 1, it is possible to provide larger horizontal opposition is (referred to as horizontal
Counter-force, identical as the horizontal bearing capacity size, direction that test pile 2 is born), it is ensured that greater level is being applied to test pile 2
When bearing capacity, no need to increase the dimensions of reaction beam 4, and then can ensure that detection operating mode is consistent with actual condition, can be improved
The accuracy of 2 horizontal bearing capacity testing result of test pile.Further, reaction beam 4 is fixed in the more branch being disposed adjacent simultaneously
Fender pile 11, by reaction beam 4 combine more be disposed adjacent enough horizontal reacting forces are provided, ensure the accurate of testing result
Property；Reaction beam 4 in the present embodiment is the counterforce structure for providing horizontal bearing capacity.In the present embodiment, displacement detecting is utilized
Instrument (not shown) can detect the displacement of cushion cap in real time in the horizontal bearing capacity detection process to test pile 2；This reality
It applies the displacement detecting instrument in example and digital display centimeter, ultrasonic displacement detector, vialog and comprehensive point inspection instrument etc. can be selected, but not
It is only limitted to this, laser displacement sensor also can be selected in the present embodiment and be detected.
Further, displacement detecting instrument is digital display centimeter, and the gauge head of digital display centimeter is support on supports side with the branch of cushion cap
On adjacent side, the holder (not shown) of installation digital display centimeter is provided on the bottom surface of foundation trench 1；When detecting, when
When the displacement in 3 occurred level direction of cushion cap, the relative displacement (movement) of horizontal direction, digital display hundred are generated between gauge head and cushion cap 3
The rotary motion for dividing the gauge head of table that the displacement of horizontal direction can be converted into the pointer of digital display centimeter, then can directly read and refer to
Numerical value (i.e. 3 horizontal displacement value of cushion cap) corresponding to needle, experiment can be accurately measured using the digital display centimeter in the present embodiment
The shift value (shift value of test pile 2 is equal to the shift value of cushion cap) of stake 2, measures simply, precision is higher.
In the present embodiment, held by the shift value of cushion cap 3 and the level of the application of jack 5 that combine displacement detector to measure
Carry power, the curve characteristic relationship that can be used between the horizontal bearing capacity of development test stake 2 born and displacement.In the present embodiment,
The branch that jack 5 is resisted against to cushion cap 3 in the horizontal direction supports side, and the bearing capacity of horizontal direction is transmitted and acted on after cushion cap 3
It is equal to jack 5 in the horizontal bearing capacity that on test pile 2, test pile 2 is born and applies horizontal applied force, it is ensured that test pile 2
The accuracy of horizontal bearing capacity testing result.
As shown in Figure 1, being equipped at intervals with multiple test piles 2 in foundation trench 1；It can be simultaneously by pile foundation level loading test device
Multiple test piles 2 are carried out at the same time with the detection of horizontal bearing capacity so that detection operating mode is consistent with actual condition.Further, more
Longitudinal uniformly arrangement of a test pile 2 along cushion cap 3 (direction of the active force applied along jack is evenly arranged).By trying
The upper end connection cushion cap 3 for testing stake 2, can avoid when applying greater level bearing capacity, the upper end of test pile 2 fractures and breakage
Phenomenon, to avoid detection test failure.
As depicted in figs. 1 and 2, cushion cap 3 and test pile 2 are all concrete structure, and the intensity etc. of cushion cap 3 and test pile 2
Grade is consistent；Its object is to improve the accuracy of testing result.Specifically, by the way that the strength grade of cushion cap 3 to be designed to and try
The strength grade for testing stake 2 is consistent, and the transmission that can avoid changing horizontal bearing capacity after the cushion cap 3 of different intensity grades is special
Property, the horizontal bearing capacity that guarantee test stake 2 is subject to is identical as the active force that jack pair cushion cap 3 applies, and then guarantee test stake 2
The accuracy of horizontal bearing capacity testing result.
Test pile 2 includes the bar planting 21 anchored into cushion cap 3.In the present embodiment, connect between cushion cap 3 and test pile 2 to improve
The fastness connect, test pile 2 include the bar planting 21 for exposing to 2 top of test pile, when progress cushion cap 3 pours, pass through bar planting 21
It realizes affixed between cushion cap 3 and test pile 2.
Reaction beam 4 is concrete structure, and the strength grade of reaction beam 4 is greater than or equal to the intensity of C30 concrete structures
Grade.Be conducive to reaction beam 4 and enough horizontal reacting forces are provided, it is ensured that the accuracy of 2 horizontal bearing capacity testing result of test pile.
As shown in figure 3, the lower end of reaction beam 4 is embedded in the lower section of the bottom surface of foundation trench 1, and reaction beam 4 passes through reinforced concrete
Soil is fixed in support pile 11.In the present embodiment, realized instead by the way that reaction beam 4 to be embedded in foundation trench 1 to and is fixed in support pile 11
The fixation of power beam 4；Convenient for when carrying out horizontal bearing capacity detection to test pile 2, cushion cap 3 and test pile 2 can be reacted on instead
Active force on power beam 4 is dispersed on support pile 11, it is possible to provide to the horizontal reacting force that test pile 2 is enough, improves pile foundation level
The support strength of loading test device entirety, ensures the accuracy of measurement result.
Further, reaction beam 4 is fixed in support pile 11 by another bar planting；Its object is to enhance reaction beam 4 and branch
The fastness connected between fender pile 11, the active force convenient for cushion cap 3 and test pile 2 to be reacted on to reaction beam 4 are scattered in supporting
In stake 11, with the support strength that enhances pile foundation level loading test device entirety, (the enough horizontal reacting force of offer is conducive to pair
Test pile 2 applies larger horizontal bearing capacity).
As shown in Fig. 2, cushion cap 3 includes spaced first transverse steel 31 and spaced first longitudinal direction reinforcing bar
32；Further, being smaller than between adjacent first transverse steel 31, between adjacent first longitudinal direction reinforcing bar 32 or it is equal to
200mm；Further, the edge sealing of the first transverse steel 31 bends straight segment length as the 15 of 31 diameter of the first transverse steel
Times, the edge sealing of first longitudinal direction reinforcing bar 32 bends 15 times that straight segment length is 32 diameter of first longitudinal direction reinforcing bar.In the present embodiment, the
Diameter of the diameter of one transverse steel 31 and first longitudinal direction reinforcing bar 32 not less than the Reinforcement of test pile 2.The present embodiment
In, the first transverse steel 31 and first longitudinal direction reinforcing bar 32 are arranged by interval, and vertical to the first transverse steel 31 and first respectively
Edge sealing processing is carried out to reinforcing bar 32, it is ensured that the overall construction intensity of cushion cap meets testing requirements.
As shown in figure 3, reaction beam 4 includes spaced second transverse steel 41 and spaced second longitudinal direction reinforcing bar
42.Further, being smaller than between adjacent second transverse steel 41, between adjacent second longitudinal direction reinforcing bar 42 or it is equal to
200mm；Further, it is 100mm, the envelope of second longitudinal direction reinforcing bar 42 that the edge sealing of the second transverse steel 41, which bends straight segment length,
It is 100mm that side, which bends straight segment length,.In the present embodiment, the diameter of the second transverse steel 41 and second longitudinal direction reinforcing bar 42 be more than or
Equal to 16mm.In the present embodiment, by the way that the second transverse steel 41 and second longitudinal direction reinforcing bar 42 is arranged by interval, and respectively to two
Transverse steel 41 and second longitudinal direction reinforcing bar 42 carry out edge sealing processing, can enhance the overall construction intensity of reaction beam 4, ensure to examination
It tests stake 2 and enough horizontal reacting forces is provided.
In the present embodiment, test pile 2 is vertically arranged.
As shown in Fig. 2, the bottom surface of foundation trench 1 is equipped with pedestal, and cushion cap 3 is supported on pedestal.It is intended that ensureing to hold
The elevation location of platform is consistent with the elevation location of test position needed for actual tests stake 2, and then accurately detects corresponding elevation location
The case where locating the horizontal bearing capacity of test pile 2, and when being studied corresponding to elevation location with this, the actual loading feelings of 1 soil layer of foundation trench
Condition.
In the present embodiment, the rectangular in cross-section of cushion cap 3.
In the utility model, before being detected to test pile 2, supporting and the excavation of foundation trench 1 need to be carried out, support pile 11 is made
Length for the supporting construction of foundation trench 1, support pile 11 should be greater than 1 depth 3m of foundation trench or more, then be installed on test pile 2 to be checked
It surveys at elevation location；Spacing+2 × 500mm of diameter+adjacent test pile 2 of the length L1=test piles 2 of cushion cap 3, cushion cap 3
Diameter+2 × 500mm of width B1=test piles 2, the height H1 of cushion cap 3 are 1.5 times to 2 times of 3 width B1 of cushion cap.Reaction beam 4
Length L2=B1+2 × 1000mm, width B2 is 250mm to 300mm, height H2=H1+2 × 500mm, and wherein reaction beam 4 buries
Height set on 1 subjacent of foundation trench is 500mm.The maximum horizontal power (support force) that jack 5 can be provided, which is at least, to be tested
1.5 times of the maximum load capacity of required offer when stake 2 horizontal bearing capacities detection.
The beneficial effects of the utility model are：
1. can guarantee that detection operating mode is consistent with actual condition, the accuracy of detection is improved.
2. enough horizontal reacting forces can be provided, avoid that when applying greater level bearing capacity the anti-of large-size specification need to be provided
Power beam.
3. test pile is avoided to fracture when bearing greater level bearing capacity and damaged, detection is caused to fail.
4. it is easy to operate, it is convenient for the detection of test pile horizontal bearing capacity.
5. can accurately be measured the shift value of test pile.
The utility model is described in detail above in association with accompanying drawings and embodiments, those skilled in the art can
Many variations example is made to the utility model according to the above description.Thus, certain details in embodiment should not be constituted to this reality
With novel restriction, the utility model will be using the range that the appended claims define as the scope of protection of the utility model.
Claims (10)
1. a kind of pile foundation level loading test device, which is characterized in that including：
The inside of foundation trench, the foundation trench is equipped with support pile；
Test pile, the lower end of the test pile are embedded in the lower section of the bottom surface of the foundation trench, and the upper end of the test pile exposes to
The bottom surface of the foundation trench, and the upper end of the test pile is connected with cushion cap, is connected on the cushion cap for measuring the cushion cap
Displacement displacement detecting instrument；
Reaction beam, the reaction beam are fixed in the support pile；And
One end of jack, the jack is resisted against the reaction beam, and the other end of the jack is held out against in the horizontal direction
Side is supported in the branch of the cushion cap.
2. pile foundation level loading test device according to claim 1, it is characterised in that：It is equipped at intervals in the foundation trench
Multiple test piles.
3. pile foundation level loading test device according to claim 1, it is characterised in that：The cushion cap and the experiment
Stake is concrete structure, and the cushion cap is consistent with the strength grade of the test pile.
4. pile foundation level loading test device according to claim 1, it is characterised in that：The test pile includes anchoring into
In the bar planting of the cushion cap.
5. pile foundation level loading test device according to claim 1, it is characterised in that：It buries the lower end of the reaction beam
Lower section set on the bottom surface of the foundation trench, and the reaction beam is fixed in the support pile by armored concrete.
6. pile foundation level loading test device according to claim 1, it is characterised in that：It is set on the bottom surface of the foundation trench
There is pedestal, and the cushion cap is supported on the pedestal.
7. pile foundation level loading test device according to claim 1, it is characterised in that：The cushion cap includes that interval is set
The first transverse steel and spaced first longitudinal direction reinforcing bar set.
8. pile foundation level loading test device according to claim 1, it is characterised in that：The reaction beam includes interval
The second transverse steel and spaced second longitudinal direction reinforcing bar being arranged.
9. pile foundation level loading test device according to claim 1, it is characterised in that：The reaction beam is concrete
Structure, and the strength grade of the reaction beam is greater than or equal to the strength grade of C30 concrete structures.
10. pile foundation level loading test device according to claim 1, it is characterised in that：The displacement detecting instrument is
Digital display centimeter, the gauge head of the digital display centimeter are support on and the branch of the cushion cap side that support side adjacent；The foundation trench
The holder for installing the digital display centimeter is provided on bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820105018.1U CN207974164U (en) | 2018-01-23 | 2018-01-23 | A kind of pile foundation level loading test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820105018.1U CN207974164U (en) | 2018-01-23 | 2018-01-23 | A kind of pile foundation level loading test device |
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| Publication Number | Publication Date |
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| CN207974164U true CN207974164U (en) | 2018-10-16 |
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| CN201820105018.1U Active CN207974164U (en) | 2018-01-23 | 2018-01-23 | A kind of pile foundation level loading test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114000551A (en) * | 2021-12-17 | 2022-02-01 | 中国华能集团清洁能源技术研究院有限公司 | Prefabricated sheet pile cylindrical foundation construction method easy to detect and bearing capacity detection method |
-
2018
- 2018-01-23 CN CN201820105018.1U patent/CN207974164U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114000551A (en) * | 2021-12-17 | 2022-02-01 | 中国华能集团清洁能源技术研究院有限公司 | Prefabricated sheet pile cylindrical foundation construction method easy to detect and bearing capacity detection method |
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