CN104975619A - Detecting device and detecting method for pile foundation static load - Google Patents
Detecting device and detecting method for pile foundation static load Download PDFInfo
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- CN104975619A CN104975619A CN201510382670.9A CN201510382670A CN104975619A CN 104975619 A CN104975619 A CN 104975619A CN 201510382670 A CN201510382670 A CN 201510382670A CN 104975619 A CN104975619 A CN 104975619A
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Abstract
The invention discloses a detecting device for pile foundation static load. The detecting device comprises a lifting jack, force collecting I-shaped steel, foot-pad clump weights, force bearing I-shaped steel and press pile clump weights; the lifting jack is placed at the top of a to-be-detected pile foundation, the lifting jack is coincided with the central axis of the to-be-detected pile foundation, the foot-pad clump weights are placed on two sides of the to-be-detected pile foundation, the force collecting I-shaped steel is arranged above the lifting jack, the center of gravity of the force collecting I-shaped steel is located on the central axis of the lifting jack, the long edges of the force collecting I-shaped steel are parallel to the long edges of the foot-pad clump weights, the multiple force bearing I-shaped steel is arranged on the foot-pad clump weights, the press pile clump weights are arranged on the force collecting I-shaped steel, the number of the force collecting I-shaped steel is 1.2 times as much as the pile foundation design bearing capacity after the pile foundation design bearing capacity is divided by single weight of the press pile clump weights, and the press pile clump weights are stacked in a pyramid shape. The detecting device and a detecting method for the pile foundation static load have the advantages of being easy to carry, uneasy to deviate the center of gravity, safe and reliable and good in detecting effect.
Description
Technical field
The present invention relates to the technical field of civil engineering, particularly relate to a kind of static load of pile foundation testing arrangement and method of testing thereof.
Background technology
At present, the loading method carrying out dead load test on pile foundation has accumulation load method or anchored pile-testing method, carrying out foundation pile settlement test method is that the support setting up long distance fixes tangent displacement sensor, such loading and detection method also exist following problem: because the equalization point difficulty piling up limited mass and preloading of accumulation load method controls, so be not suitable for large-tonnage dead load test on pile foundation; Because anchored pile-testing method to adopt near test pile working pile to be around anchoring pile, once there is unbalance loading or overload, there is working pile by drawing crack or the danger of breaking; Support due to long distance is subject to the impact such as temperature, vibration and produces distortion, the problem causing the not enough or test data of settling amount measuring accuracy unreliable etc.
Summary of the invention
Technical problem to be solved by this invention is for the above-mentioned state of the art, and provides a kind of static load of pile foundation testing arrangement and method of testing thereof, have be simple and easy to implement, center of gravity not easily departs from, safe and reliable, measure effective advantage.
The present invention solves the problems of the technologies described above adopted technical scheme:
A kind of static load of pile foundation testing arrangement, wherein: this test static load of pile foundation device comprises: jack, collection power i iron, feet balancing weight, load i iron, piling balancing weight, jack is placed on the top of tested pile foundation, the central axes of jack and tested pile foundation, feet balancing weight is placed on tested pile foundation both sides, collection power i iron is placed on above jack, the center of gravity of collection power i iron is on the central axis of jack, the long limit of collection power i iron is parallel with the long limit of feet balancing weight, the height sum that the height of collection power i iron and the height of jack and tested pile foundation elevate above the soil is not more than the height of feet balancing weight, load i iron is placed on feet balancing weight, quantity is multiple, the long limit of load i iron is vertical with the long limit of collection power i iron to be arranged, gap between Neighbor Set power i iron is not more than 1/3rd of the long edge lengths of piling balancing weight, piling balancing weight is placed on collection power i iron, the quantity of piling balancing weight is Pile Foundations Design bearing capacity divided by 12 times of single piling balancing weight gravity, piling balancing weight is that pyramid is piled up, the piling balancing weight number of top layer is no more than four, and the combined gravity of piling balancing weight of top layer and the central axes of jack.
For optimizing technique scheme, the concrete measure taked also comprises:
Above-mentioned feet balancing weight is provided with four to eight pieces according to the size of tested pile foundation, and etc. the left and right of distributed number in tested pile foundation, feet balancing weight is arranged with at least one deck steel bed course.
Above-mentioned feet balancing weight and piling balancing weight are that length is two meters, width and be highly the reinforced concrete block of a meter.
Above-mentioned feet balancing weight and the every block of piling balancing weight are four tons of weights.
When the stake footpath of above-mentioned tested pile foundation is less than 300mm, adopt four pieces of feet balancing weights, when the stake footpath of tested pile foundation is 300mm to 500mm, adopt six pieces of feet balancing weights, when the stake footpath of tested pile foundation is greater than 500mm, adopt eight pieces of feet balancing weights.
The feet balancing weight group of feet balancing weight composition is the twice sum in the stake footpath of 1.5m and tested pile foundation apart from the minimum distance of tested pile foundation.
When the above-mentioned height sum elevated above the soil when the height of collection power i iron and the height of jack and tested pile foundation is less than the height of feet balancing weight, between jack and collection power i iron, be filled with cushion block.
Above-mentioned cushion block is metal sheet or metal derby.
A method for static load of pile foundation device to test static load of pile foundation, comprises the following steps:
Step one, selected tested pile foundation, inquire about the design static load value of this tested pile foundation, for scene is equipped with enough feet balancing weights and piling balancing weight;
The placement distance of step 2, calculating feet balancing weight and tested pile foundation, steel bed course is laid in the place of placing feet balancing weight;
Step 3, on steel bed course, place feet balancing weight, will long limit be connected, minor face snugly pushes away and put between feet balancing weight, feet balancing weight is divided into two groups, is placed on tested pile foundation both sides symmetrically;
Step 4, in tested pile foundation, place jack, the height of the height that anticipation jack and tested pile foundation elevate above the soil and collection power i iron and whether lower than the height of feet balancing weight, if lower than the height of feet balancing weight, between jack and collection power i iron, dose cushion block, but dose the height of height that the jack height after cushion block, cushion block and tested pile foundation elevate above the soil and collection power i iron and the height of feet balancing weight must not be greater than;
Step 4, on jack, place collection power i iron, feet balancing weight is placed load i iron, collection power i iron and load i iron across vertical runs, load i iron is placed piling balancing weight;
Step 5, rise jack, jack promotes collection power i iron and withstands on load i iron bottom, and piling balancing weight is to jack effect one counter-force, and this counter-force is passed in tested pile foundation by jack, for testing the static load of tested pile foundation;
Step 6, jack is added once press, until pressure reaches the design static force of tested pile foundation at set intervals; Record and calculate the settling amount of tested pile foundation, judge the actual static force of tested pile foundation.
Compared with prior art, a kind of static load of pile foundation testing arrangement of the present invention, wherein: this test static load of pile foundation device comprises: jack, collection power i iron, feet balancing weight, load i iron, piling balancing weight, jack is placed on the top of tested pile foundation, the central axes of jack and tested pile foundation, feet balancing weight is placed on tested pile foundation both sides, collection power i iron is placed on above jack, the center of gravity of collection power i iron is on the central axis of jack, the long limit of collection power i iron is parallel with the long limit of feet balancing weight, the height sum that the height of collection power i iron and the height of jack and tested pile foundation elevate above the soil is not more than the height of feet balancing weight, load i iron is placed on feet balancing weight, quantity is multiple, the long limit of load i iron is vertical with the long limit of collection power i iron to be arranged, gap between Neighbor Set power i iron is not more than 1/3rd of the long edge lengths of piling balancing weight, piling balancing weight is placed on collection power i iron, the quantity of piling balancing weight is Pile Foundations Design bearing capacity divided by 12 times of single piling balancing weight gravity, piling balancing weight is that pyramid is piled up, the piling balancing weight number of top layer is no more than four, and the combined gravity of piling balancing weight of top layer and the central axes of jack.
Overlap arrange by tested pile foundation, jack, collection power i iron, the isostructural center line of piling balancing weight, make the center of gravity of whole static load of pile foundation structure in the middle part of tested pile foundation, whole device steadiness is good, in order to reduce difficulty of construction, originally the piling balancing weight piled up in cuboid becomes and piles up in pyramid by the present invention, the more convenient center finding whole device, constructs simple and convenient.
The present invention have be simple and easy to implement, center of gravity not easily departs from, safe and reliable, measure effective advantage.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the lateral view of Fig. 1.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Fig. 1 is to Figure 2 shows that structural representation of the present invention.
Reference numeral is wherein: tested pile foundation 1, jack 2, collection power i iron 3, feet balancing weight 4, load i iron 5, piling balancing weight 6, cushion block 7.
As shown in Figure 1 to Figure 2,
A kind of static load of pile foundation testing arrangement, wherein: this test static load of pile foundation device comprises: jack 2, collection power i iron 3, feet balancing weight 4, load i iron 5, piling balancing weight 6, jack 2 is placed on the top of tested pile foundation 1, the central axes of jack 2 and tested pile foundation 1, feet balancing weight 4 is placed on tested pile foundation 1 both sides, collection power i iron 3 is placed on above jack 2, the center of gravity of collection power i iron 3 is on the central axis of jack 2, the long limit of collection power i iron 3 is parallel with the long limit of feet balancing weight 4, the height sum that the height of collection power i iron 3 and the height of jack 2 and tested pile foundation 1 elevate above the soil is not more than the height of feet balancing weight 4, load i iron 5 is placed on feet balancing weight 4, quantity is multiple, the long limit of load i iron 5 is vertical with the long limit of collection power i iron 3 to be arranged, gap between Neighbor Set power i iron 3 is not more than 1/3rd of the long edge lengths of piling balancing weight 6, piling balancing weight 6 is placed on collection power i iron 3, the quantity of piling balancing weight 6 is Pile Foundations Design bearing capacity divided by 12 times of single piling balancing weight 6 gravity, piling balancing weight 6 is piled up in pyramid, piling balancing weight 6 number of top layer is no more than four, and the combined gravity of the piling balancing weight 6 of top layer and the central axes of jack 2.
In embodiment, feet balancing weight 4 is provided with four to eight pieces according to the size of tested pile foundation 1, and etc. the left and right of distributed number in tested pile foundation 1, feet balancing weight 4 is arranged with at least one deck steel bed course.
In embodiment, feet balancing weight 4 and piling balancing weight 6 are that length is two meters, width and be highly the reinforced concrete block of a meter.
In embodiment, feet balancing weight 4 is four tons of weights with the every block of piling balancing weight 6.
In embodiment, when the stake footpath of tested pile foundation 1 is less than 300mm, adopt four pieces of feet balancing weights 4, when the stake footpath of tested pile foundation 1 is 300mm to 500mm, adopt six pieces of feet balancing weights 4, when the stake footpath of tested pile foundation 1 is greater than 500mm, adopt eight pieces of feet balancing weights 4.
The feet balancing weight group that feet balancing weight 4 forms is the twice sum in the stake footpath of 1.5m and tested pile foundation 1 apart from the minimum distance of tested pile foundation 1.
In embodiment, when the height sum that height and the tested pile foundation 1 of the height with jack 2 that collect power i iron 3 elevates above the soil is less than the height of feet balancing weight 4, jack 2 and collect between power i iron 3 and be filled with cushion block 7.
In embodiment, cushion block 7 is metal sheet or metal derby.
As claim 8 tests a method for static load of pile foundation device to test static load of pile foundation, comprise the following steps:
Step one, selected tested pile foundation 1, inquire about the design static load value of this tested pile foundation 1, for scene is equipped with enough feet balancing weights 4 and piling balancing weight 6;
Step 2, calculating feet balancing weight 4 and the placement distance of tested pile foundation 1, steel bed course is laid in the place of placing feet balancing weight 4;
Step 3, on steel bed course, place feet balancing weight 4, will long limit be connected, minor face snugly pushes away and put between feet balancing weight 4, feet balancing weight 4 is divided into two groups, is placed on tested pile foundation 1 both sides symmetrically;
Step 4, in tested pile foundation 1, place jack 2, the height of the height that anticipation jack 2 and tested pile foundation 1 elevate above the soil and collection power i iron 3 and whether lower than the height of feet balancing weight 4, if lower than the height of feet balancing weight 4, between jack 2 and collection power i iron 3, dose cushion block 7, but dose the height of height that the height of the jack 2 after cushion block 7, cushion block 7 and tested pile foundation 1 elevate above the soil and collection power i iron 3 and the height of feet balancing weight 4 must not be greater than;
Step 4, on jack 2, place collection power i iron 3, feet balancing weight 4 is placed load i iron 5, collection power i iron 3 and load i iron 5 across vertical runs, load i iron 5 is placed piling balancing weight 6;
Step 5, rise jack 2, jack 2 promotes collection power i iron 3 and withstands on load i iron 5 bottom, and piling balancing weight 6 pairs of jack 2 act on a counter-force, and this counter-force is passed in tested pile foundation 1 by jack 2, for testing the static load of tested pile foundation 1;
Step 6, jack 2 is added once press, until pressure reaches the design static force of tested pile foundation 1 at set intervals; Record and calculate the settling amount of tested pile foundation 1, judge the actual static force of tested pile foundation 1.
The embodiment of the present invention is overlapped arranged by tested pile foundation 1, jack 2, collection power i iron 3, the isostructural center line of piling balancing weight 6, make the center of gravity of whole static load of pile foundation structure in the middle part of tested pile foundation 1, whole device steadiness is good, in order to reduce difficulty of construction, originally the piling balancing weight 6 piled up in cuboid becomes and piles up in pyramid by the present invention, the more convenient center finding whole device, constructs simple and convenient.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by referring to the preferred embodiments of the present invention, invention has been described, but those of ordinary skill in the art is to be understood that, various change can be made to it in the form and details, and not depart from the spirit and scope of the present invention that appended claims limits.
Claims (9)
1. a static load of pile foundation testing arrangement, is characterized in that: this test static load of pile foundation device comprises: jack (2), collection power i iron (3), feet balancing weight (4), load i iron (5), piling balancing weight (6), described jack (2) is placed on the top of tested pile foundation (1), the central axes of jack (2) and tested pile foundation (1), described feet balancing weight (4) is placed on tested pile foundation (1) both sides, described collection power i iron (3) is placed on jack (2) top, the center of gravity of collection power i iron (3) is on the central axis of jack (2), the long limit of described collection power i iron (3) is parallel with the long limit of feet balancing weight (4), the height sum that the height of described collection power i iron (3) and the height of jack (2) and tested pile foundation (1) elevate above the soil is not more than the height of feet balancing weight (4), described load i iron (5) is placed on feet balancing weight (4), quantity is multiple, the long limit of load i iron (5) is vertical with the long limit of collection power i iron (3) to be arranged, gap between adjacent described collection power i iron (3) is not more than 1/3rd of the long edge lengths of piling balancing weight (6), described piling balancing weight (6) is placed on collection power i iron (3), the quantity of described piling balancing weight (6) is Pile Foundations Design bearing capacity divided by 12 times of single piling balancing weight (6) gravity, described piling balancing weight (6) is piled up in pyramid, piling balancing weight (6) number of top layer is no more than four, and the combined gravity of the piling balancing weight (6) of top layer and the central axes of jack (2).
2. a kind of static load of pile foundation testing arrangement according to claim 1, it is characterized in that: described feet balancing weight (4) is provided with four to eight pieces according to the size of tested pile foundation (1), etc. the left and right of distributed number in tested pile foundation (1), described feet balancing weight (4) is arranged with at least one deck steel bed course.
3. a kind of static load of pile foundation testing arrangement according to claim 2, is characterized in that: described feet balancing weight (4) and piling balancing weight (6) are that length is two meters, width and be highly the reinforced concrete block of a meter.
4. a kind of static load of pile foundation testing arrangement according to claim 3, is characterized in that: described feet balancing weight (4) is four tons of weights with the every block of piling balancing weight (6).
5. a kind of static load of pile foundation testing arrangement according to claim 4, it is characterized in that: when the stake footpath of described tested pile foundation (1) is less than 300mm, adopt four pieces of feet balancing weights (4), when the stake footpath of described tested pile foundation (1) is 300mm to 500mm, adopt six pieces of feet balancing weights (4), when the stake footpath of described tested pile foundation (1) is greater than 500mm, adopt eight pieces of feet balancing weights (4).
6. a kind of static load of pile foundation testing arrangement according to claim 5, is characterized in that: the feet balancing weight group that described feet balancing weight (4) forms is the twice sum in the stake footpath of 1.5m and tested pile foundation (1) apart from the minimum distance of tested pile foundation (1).
7. a kind of static load of pile foundation testing arrangement according to claim 6, it is characterized in that: when the height sum that the height of described collection power i iron (3) and the height of jack (2) and tested pile foundation (1) elevate above the soil is less than the height of feet balancing weight (4), between described jack (2) and collection power i iron (3), be filled with cushion block (7).
8. a kind of static load of pile foundation testing arrangement according to claim 7, is characterized in that: described cushion block (7) is metal sheet or metal derby.
9. a method for test static load of pile foundation device to test static load of pile foundation as claimed in claim 8, is characterized in that: comprise the following steps:
Step one, selected tested pile foundation (1), inquire about the design static load value of this tested pile foundation (1), for scene is equipped with enough feet balancing weights (4) and piling balancing weight (6);
Step 2, calculating feet balancing weight (4) and the placement distance of tested pile foundation (1), steel bed course is laid in the place of placing feet balancing weight (4);
Step 3, on steel bed course, place feet balancing weight (4), will long limit be connected, minor face snugly pushes away and put between feet balancing weight (4), feet balancing weight (4) is divided into two groups, is placed on tested pile foundation (1) both sides symmetrically;
Step 4, tested pile foundation (1) is placed jack (2), the height of the height that anticipation jack (2) and tested pile foundation (1) elevate above the soil and collection power i iron (3) and whether lower than the height of feet balancing weight (4), if lower than the height of feet balancing weight (4), cushion block (7) is dosed between jack (2) and collection power i iron (3), but dose the jack (2) after cushion block (7) highly, height and the height that must not be greater than feet balancing weight (4) of the height that cushion block (7) and tested pile foundation (1) elevate above the soil and collection power i iron (3),
Step 4, placement collection power i iron (3) on jack (2), at feet balancing weight (4) upper placement load i iron (5), collection power i iron (3) and load i iron (5) across vertical runs, at load i iron (5) upper placement piling balancing weight (6);
Step 5, rise jack (2), jack (2) promotes collection power i iron (3) and withstands on load i iron (5) bottom, piling balancing weight (6) acts on a counter-force to jack (2), this counter-force is passed in tested pile foundation (1) by jack (2), for testing the static load of tested pile foundation (1);
Step 6, jack (2) is added once press, until pressure reaches the design static force of tested pile foundation (1) at set intervals; Record and calculate the settling amount of tested pile foundation (1), judge the actual static force of tested pile foundation (1).
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| CN201510382670.9A CN104975619A (en) | 2015-07-03 | 2015-07-03 | Detecting device and detecting method for pile foundation static load |
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Cited By (4)
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| CN106400856A (en) * | 2016-12-02 | 2017-02-15 | 广州建设工程质量安全检测中心有限公司 | Loading device and method for static load test of pile foundation |
| CN106522287A (en) * | 2016-10-25 | 2017-03-22 | 广西壮族自治区建筑工程质量检测中心 | Side pile vertical bearing capacity detecting method |
| CN107130649A (en) * | 2017-06-21 | 2017-09-05 | 浙江求是工程检测有限公司 | A kind of large-tonnage concrete block preloading static load of pile foundation device |
| CN110029694A (en) * | 2019-05-09 | 2019-07-19 | 福州大学 | A kind of construction method suitable for shaketalle test pile foundation clump weight |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106522287A (en) * | 2016-10-25 | 2017-03-22 | 广西壮族自治区建筑工程质量检测中心 | Side pile vertical bearing capacity detecting method |
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| CN107130649B (en) * | 2017-06-21 | 2019-11-22 | 浙江求是工程检测有限公司 | A kind of large-tonnage concrete block preloading static load of pile foundation device |
| CN110029694A (en) * | 2019-05-09 | 2019-07-19 | 福州大学 | A kind of construction method suitable for shaketalle test pile foundation clump weight |
| CN110029694B (en) * | 2019-05-09 | 2024-02-06 | 福州大学 | Construction method suitable for vibrating table test pile foundation balancing weight |
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Application publication date: 20151014 |