CN107130649B - A kind of large-tonnage concrete block preloading static load of pile foundation device - Google Patents
A kind of large-tonnage concrete block preloading static load of pile foundation device Download PDFInfo
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- CN107130649B CN107130649B CN201710477200.XA CN201710477200A CN107130649B CN 107130649 B CN107130649 B CN 107130649B CN 201710477200 A CN201710477200 A CN 201710477200A CN 107130649 B CN107130649 B CN 107130649B
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- concrete column
- load
- pile foundation
- counterweight element
- jack
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a kind of large-tonnage concrete block preloading static load of pile foundation devices, the load concrete column for being located at the supporting station for being fixed on ground of pile foundation two sides including two and being placed in along supporting station width direction above supporting station, weight concrete column is placed with above the load concrete column, the weight concrete column is equipped with several along load concrete column length direction and forms counterweight element, the counterweight element is equipped with several along its short transverse, the jack for jacking up counterweight element and load concrete column is equipped with below the load concrete column, the jack is placed in above pile foundation.A possibility that weight concrete column and the contact area of counterweight element below are larger, i.e., frictional force is larger, reduce weight concrete column offset slide.To reduce supported at two edges platform since unbalance stress leads to its sedimentation, the probability for causing the offset of load concrete column that all negative counterweight elements is caused to collapse reduces security risk.
Description
Technical field
The present invention relates to static load of pile foundation tests, and in particular to a kind of large-tonnage concrete block preloading static load of pile foundation device.
Background technique
Currently, carrying out the loading method of dead load test on pile foundation has accumulation load method or anchored pile-testing method, since anchored pile-testing method needs test pile
Working pile around nearby is anchoring pile, does experiment to it and is subject to certain restrictions, and accumulation load method does not require place to have working pile i.e.
It can be tested, the scope of application is wider, and preloading clump weight can pre-establish, and facilitates practical operation, therefore accumulation load method is compared to anchor
Stake method uses more.
Such as application No. is 201510382670.9 patents, and which disclose a kind of static load of pile foundation test devices, comprising:
Jack, collection power I-steel, feet clump weight, load I-steel, piling clump weight；Jack is placed on the top of tested pile foundation
The central axis of portion, jack and tested pile foundation is overlapped, and feet clump weight is placed on tested pile foundation two sides, and collection power I-steel is placed
Above jack, collect the center of gravity of power I-steel on the central axis of jack, collects the long side and feet counterweight of power I-steel
The long side of block is parallel, and load I-steel is placed on feet clump weight, quantity be it is multiple, piling clump weight be placed on collection power I-shaped
On steel, the quantity of piling clump weight is Pile Foundations Design bearing capacity divided by 1 point 2 times of single piling clump weight gravity, and piling is matched
Pouring weight is piled up in pyramid.
In practice of construction, when the dead load test on pile foundation of large-tonnage need to be carried out, more piling clump weight is needed, according to gold
Tower is piled up insufficient to the utilization rate in space, need to stack very high, under the action of the external force such as vibration and typhoon, will cause the pressure of top
Toppling over for stake clump weight, causes safety problem.And if the discharge offset when discharging piling clump weight, the feet that will lead to both sides are matched
The sedimentation of pouring weight unbalance stress, both sides feet clump weight is different, and all piling clump weights is easy to cause to collapse.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of large-tonnage concrete block preloading static load of pile foundation
Device makes what weight concrete column can be stable when static test to be placed on jack, reduces the general of weight concrete column collapsing
Rate reduces security risk.
To achieve the above object, the present invention provides the following technical scheme that
A kind of large-tonnage concrete block preloading static load of pile foundation device is located at the bearing for being fixed on ground of pile foundation two sides including two
Platform and the load concrete column above supporting station is placed in along supporting station width direction, be placed with above the load concrete column
Weight concrete column, the weight concrete column are equipped with several along load concrete column length direction and form counterweight element, institute
It states counterweight element and is equipped with several along its short transverse, be equipped with below the load concrete column for jacking up counterweight element and holding
The jack of power concrete column, the jack are placed in above pile foundation.
By using above-mentioned technical proposal, use weight concrete column as counterweight, due to weight concrete column can whole press
Rectangular arranged accumulation, therefore when accumulating identical weight bearing object, piling height is lower, keeps weight concrete column metastable
It is placed on jack.And weight concrete column and the contact area of counterweight element below are larger, i.e., frictional force is larger, subtracts
A possibility that small weight concrete column offset slide.Since weight concrete column is in column type, therefore it only need to be along its width direction
It is arranged on load concrete column, reduces the probability for causing center of gravity seriously to deviate due to offset discharge.To reduce
Supported at two edges platform causes the offset of load concrete column that all negative counterweight elements is caused to collapse since unbalance stress leads to its sedimentation
Probability reduces security risk.
The further setting of the present invention are as follows: be embedded with along its length in the load concrete column equipped with prestressed
Supporting rib, the supporting rib in bending setting and it is opening down.
By using above-mentioned technical proposal, thus the moment of flexure that can be born when improving load concrete column by compression,
A possibility that reducing the fracture of load concrete column, makes to test stable progress.
The further setting of the present invention are as follows: perpendicular between the weight concrete column in two adjacent counterweight elements to set
It sets.
By using above-mentioned technical proposal, to make every every section of weight concrete column upper surface by different counterweights
Concrete column is to its pressure, i.e., weight concrete column receives its all counterweight element in top to its pressure, increases and matches
The frictional force that loaded concrete column is subject to makes what it can be more stable to be placed on jack, reduces a possibility that its offset is toppled over.
The further setting of the present invention are as follows: the load concrete column outer wall cladding is fixed with force bearing plate, the jack
It is connected to force bearing plate.
By using above-mentioned technical proposal, the concentrated stress that load concrete column is subject to is reduced, so that it is guaranteed that jack
It can effectively give load concrete column upward power.
The further setting of the present invention are as follows: dormant bolt is threaded on the force bearing plate, the dormant bolt is equipped with
Several and be threadedly connected to load concrete column.
By using above-mentioned technical proposal, to make force bearing plate and load concrete column is stable links together, prevent
In jack pair force bearing plate force, load concrete column and force bearing plate generate offset, influence test accuracy.
The further setting of the present invention are as follows: load concrete column upper surface is offered for accommodating its top counterweight list
The limiting slot of member, the top counterweight element are embedded in limiting slot.
By using above-mentioned technical proposal, limiting slot has the limit power an of radial direction to counterweight element, and it is mixed to reduce counterweight
Solidifying earth pillar, along the probability of load concrete column length direction offset, keeps counterweight element more stable above load concrete column
It is placed on load concrete column, it is ensured that test safely and smoothly carries out.
The further setting of the present invention are as follows: the counterweight element upper surface is offered for accommodating its top counterweight element
Holding tank, the top counterweight element are embedded in the counterweight element of lower section.
It,, can only be square along its length when counterweight element offset due to the presence of holding tank by using above-mentioned technical proposal
To sliding, the counterweight element of this hour offset has a frictional force along its length to counterweight element below, but under it
The limit power for the holding tank that the counterweight element of side is also subject to, therefore counterweight element will not move length direction of counterweight element above it
It is dynamic, to make what counterweight element can be more stable to be mounted on jack, reduces a possibility that it topples over, reduce security risk.
The further setting of the present invention are as follows: the every weight concrete column is greater than 1T.
By using above-mentioned technical proposal, to make the dead load test on pile foundation it is suitable for 120T or more, prevent counterweight mixed
Whole height is excessively high after solidifying earth pillar accumulation, and weight concrete column is caused easily to collapse.Time of stacking is decreased simultaneously
Number, improves test efficiency.
The further setting of the present invention are as follows: the very heavy top bottom surface is installed with contact plate, and the contact plate is connected to pile foundation.
By using above-mentioned technical proposal, so that the power for being subject to jack more evenly can pass to pile foundation, reduce
The concentrated stress that pile foundation is subject to reduces the deformation of pile foundation, makes pile foundation uniform settlement.
The invention has the following advantages that reducing a possibility that weight concrete column topples over, reduce in detection process
Security risk.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment；
Fig. 2 is the enlarged drawing in Fig. 1 at A；
Fig. 3 is the structural schematic diagram of load concrete column and weight concrete column in embodiment.
Appended drawing reference: 1, jack；2, load concrete column；3, weight concrete column；4, contact plate；5, supporting station；6,
Supporting rib；7, limiting slot；8, force bearing plate；9, dormant bolt；10, counterweight element；11, holding tank；12, pile foundation.
Specific embodiment
Referring to attached drawing, the present invention will be further described.
As shown in Figure 1, a kind of large-tonnage concrete block preloading static load of pile foundation device, including jack 1,2 and of load concrete column
Weight concrete column 3.For 1 coaxial placement of jack above pile foundation 12,1 bottom surface of jack is fixed with contact plate 4, and contact plate 4 supports
It is connected to pile foundation 12.
As shown in Figure 1,1 two sides of jack are equipped with supporting station 5, supporting station 5 is fixedly installed in ground.Supporting station 5 can pass through
The methods of anchor pole, screw rod or casting are fixed on ground.2 both ends of load concrete column are connected to two 5 upper surfaces of supporting station respectively.
Supporting rib 6 is embedded in load concrete column 2, supporting rib 6 is arranged along 2 length direction of load concrete column, and load concrete
Several supporting ribs 6 are equipped in column 2.Supporting rib 6 when embedded be equipped with prestressing force, supporting rib 6 in bending setting and it is opening down.
As shown in figures 1 and 3,2 upper surface of load concrete column offers limiting slot 7, and limiting slot 7 is connected to load concrete
The two sides side wall along its length of column 2.As shown in Fig. 2, 2 outer wall of load concrete column cladding is fixed with force bearing plate 8, force bearing plate 8
On be threaded with dormant bolt 9,9 lower end surface of dormant bolt is located in force bearing plate 8.Dormant bolt 9 is equipped with several and equal spiral shell
Line is connected to load concrete column 2.Jack 1 is connected to force bearing plate 8.
As shown in figures 1 and 3, weight concrete column 3 is embedded in limiting slot 7, and every weight concrete column 3 is greater than 1T.
Weight concrete column 3 is equipped with several along 2 length direction of load concrete column and forms counterweight element 10.Counterweight element 10 is along its height
It spends direction and is equipped with several, be vertical setting between the weight concrete column 3 in two adjacent counterweight elements 10.Counterweight element 10
Upper surface offers holding tank 11, and holding tank 11 can hold the counterweight element 10 above it.Top counterweight element 10 is embedded at lower section
In counterweight element 10.
The working principle of the device is as described below:
1, supporting station 5 is fixed on the ground around pile foundation 12, jack 1 is coaxially disposed in pile foundation 12；
2, then 2 both ends of load concrete column are placed on two supporting stations 5, jack 1 is connected to bearing plate at this time；
3, weight concrete column 3 is embedded in limiting slot 7, and is sequentially placed several along its width direction, formation is matched
Weight unit 10；
4, continue to place counterweight element 10 in the holding tank 11 of counterweight element 10, between two adjacent counterweight elements 10
It is vertical setting；
5, jack 1 has a upward power to load concrete column 2, thus counterweight element 10 and load concrete column 2
There is a reaction force to it, which is passed to pile foundation 12 by jack 1, makes pile foundation 12 by downward pressure, to measure pile foundation
12 settling data.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of large-tonnage concrete block preloading static load of pile foundation device, it is characterized in that: including two is located at being connected for pile foundation (12) two sides
The load concrete column (2) above supporting station (5), institute are placed in the supporting station (5) on ground and along supporting station (5) width direction
It states and is placed with weight concrete column (3) above load concrete column (2), the weight concrete column (3) is along load concrete column
(2) length direction is equipped with several and forms counterweight element (10), and the counterweight element (10) is equipped with several along its short transverse,
The jack (1) for jacking up counterweight element (10) and load concrete column (2) is equipped with below the load concrete column (2),
The jack (1) is placed in above pile foundation (12), the weight concrete column (3) in two adjacent counterweight elements (10) it
Between be vertical setting, load concrete column (2) upper surface offer for accommodate its top counterweight element (10) limit
Slot (7), the top counterweight element (10) are embedded in limiting slot (7), and counterweight element (10) upper surface, which offers, to be used for
The holding tank (11) of its top counterweight element (10) is accommodated, the top counterweight element (10) is embedded at the lower section counterweight element
(10) in, load concrete column (2) the outer wall cladding is fixed with force bearing plate (8), and the jack (1) is connected to force bearing plate
(8), it is threaded with dormant bolt (9) on the force bearing plate (8), the dormant bolt (9) is equipped with several and screw thread connects
It is connected to load concrete column (2).
2. a kind of large-tonnage concrete block preloading static load of pile foundation device according to claim 1, it is characterized in that: the load coagulation
It is embedded with along its length in earth pillar (2) equipped with prestressed supporting rib (6), the supporting rib (6) is in bending setting and opens
Mouth down.
3. a kind of large-tonnage concrete block preloading static load of pile foundation device according to claim 2, it is characterized in that: the every counterweight
Concrete column (3) is greater than 1T.
4. a kind of large-tonnage concrete block preloading static load of pile foundation device according to claim 3, it is characterized in that: the jack
(1) bottom surface is installed with contact plate (4), and the contact plate (4) is connected to pile foundation (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710477200.XA CN107130649B (en) | 2017-06-21 | 2017-06-21 | A kind of large-tonnage concrete block preloading static load of pile foundation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710477200.XA CN107130649B (en) | 2017-06-21 | 2017-06-21 | A kind of large-tonnage concrete block preloading static load of pile foundation device |
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| CN107130649A CN107130649A (en) | 2017-09-05 |
| CN107130649B true CN107130649B (en) | 2019-11-22 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107869148A (en) * | 2017-11-03 | 2018-04-03 | 江苏科能电力工程咨询有限公司 | A kind of assembled rectangle isolated footing and its installation method |
| CN112900505B (en) * | 2021-01-20 | 2022-08-02 | 浙江求是工程检测有限公司 | Gravel pile composite foundation bearing capacity detection device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW580531B (en) * | 2002-10-08 | 2004-03-21 | Great Asia Engineering Consult | A load test method of foundation piles and device thereof formed by an assembled main beam and aid beam system |
| CN101560779A (en) * | 2009-05-13 | 2009-10-21 | 中冶成工建设有限公司 | Foundation pile static test loading counterforce test method and weight boxes used by same |
| CN103061360A (en) * | 2012-12-05 | 2013-04-24 | 中国五冶集团有限公司 | Stress application system for large-tonnage static load tests |
| CN203705266U (en) * | 2014-01-21 | 2014-07-09 | 安徽省建筑工程质量监督检测站 | Static load testing device for testing engineering pile |
| CN104975619A (en) * | 2015-07-03 | 2015-10-14 | 朱洋 | Detecting device and detecting method for pile foundation static load |
-
2017
- 2017-06-21 CN CN201710477200.XA patent/CN107130649B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW580531B (en) * | 2002-10-08 | 2004-03-21 | Great Asia Engineering Consult | A load test method of foundation piles and device thereof formed by an assembled main beam and aid beam system |
| CN101560779A (en) * | 2009-05-13 | 2009-10-21 | 中冶成工建设有限公司 | Foundation pile static test loading counterforce test method and weight boxes used by same |
| CN103061360A (en) * | 2012-12-05 | 2013-04-24 | 中国五冶集团有限公司 | Stress application system for large-tonnage static load tests |
| CN203705266U (en) * | 2014-01-21 | 2014-07-09 | 安徽省建筑工程质量监督检测站 | Static load testing device for testing engineering pile |
| CN104975619A (en) * | 2015-07-03 | 2015-10-14 | 朱洋 | Detecting device and detecting method for pile foundation static load |
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