CN110206006A - A kind of convenient and fast Large Field load testing method - Google Patents
A kind of convenient and fast Large Field load testing method Download PDFInfo
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- CN110206006A CN110206006A CN201910355452.4A CN201910355452A CN110206006A CN 110206006 A CN110206006 A CN 110206006A CN 201910355452 A CN201910355452 A CN 201910355452A CN 110206006 A CN110206006 A CN 110206006A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
- E02D1/022—Investigation of foundation soil in situ before construction work by investigating mechanical properties of the soil
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of convenient and fast Large Field load testing method, firstly, marking off counter-force bridge zone domain；Both ends heap in counter-force bridge zone domain bankets stone gentle slope；It is honest to set up several supports, and earnestly above sets up lateral bearing beam and longitudinal direction bearing beam in support, covers steel plate and forms counter-force bridge loading end；Center setting test measuring point in counter-force bridge zone domain, sets up loading plate and jack, places displacement measurement bar and displacement meter, and construction machinery is travelled to forming counter-force on the steel plate of counter-force bridge overlying regions；Apply multistage load progress load test by hydraulic jack and reads the sedimentation of corresponding load loading plate；P~the S curve for drawing relationship between performance sedimentation and vertical load determines foundation bearing capacity basic value f according to regulation0, calculate the deformation modulus E of measuring point0.The present invention is obvious to the improved efficiency of Large Field load test, and all components in addition to data-detection apparatus are the common material in civil engineering scene or equipment, reduces preparation and the implementation cost of test.
Description
Technical field
The present invention relates to field of civil engineering, and in particular to a kind of convenient and fast Large Field load testing method.
Background technique
In building foundation, roadbed and the foundation constructions engineering such as fill earth and rock works, the ultimate bearing capacity of ground with
And deformation modulus parameter has particularly important directive significance to the design and construction of engineering.According to " earthwork test rule "
(SL237-1999), on-site measurement generally is carried out frequently with foundation parameter of the load test to various soil properties, in load test
Need to provide enough counter-forces to be further applied load to sample.Common load applying method has accumulation load method, anchorage pile method and landform
Force Method.Anchorage pile method has higher requirement to the fixing intensity of stake point, and landform Force Method is merely able in cavity engineering and pit slot
It is carried out in engineering using by existing landform offer counter-force.Concrete precast block or earth bag preloading shape are commonly used in existing engineering
At counterforce structure, but in order to reach enough heap mounted mass, the heaps loading such as a large amount of earth bag and prefabricated section is needed, heap loading
Filling is stacked and is dismantled and expends more manpower and material resources and time.
Summary of the invention
The purpose of the present invention is to provide a kind of convenient and fast Large Field load testing methods, with efficient and convenient at the scene
Measure parameter in the carrying of ground.
The technical scheme is that
The present invention provides a kind of convenient and fast Large Field load testing method, comprising the following steps:
Step 1: marking off counter-force bridge zone domain in foundation surface to be measured；
Step 2: the both ends heap in counter-force bridge zone domain bankets stone gentle slope；
Step 3: being stacked into several using I-steel and support earnestly, and earnestly upper erection transverse direction bearing beam and longitudinal direction are held in support
Power beam, and cover steel plate above aforementioned bearing beam and form counter-force bridge loading end；
Step 4: the center setting test measuring point in counter-force bridge zone domain sets up between measuring point ground and longitudinal bearing beam and holds
Support plate and jack, place displacement measurement bar and displacement meter, aforementioned displacements meter are placed on loading plate；
Step 5: construction machinery is travelled to forming counter-force on the steel plate of counter-force bridge overlying regions；
Step 6: multistage load progress load test being applied by hydraulic jack and reads the heavy of corresponding load loading plate
Drop；
Step 7: according to the loads at different levels and corresponding loading plate settling data of step 6 acquisition, drawing performance sedimentation and erect
To p~S curve of relationship between load, provide to determine foundation bearing capacity basic value according to " earthwork test rule SL237-1999 "
f0；
Step 8: according to the p~S curve drawn in step 7, calculating the deformation modulus E of measuring point0；
In formula: E0For wet environment modulus, unit kPa；M is the form parameter of loading plate, and circle is 0.79, rectangular to be
0.89；μ is material Poisson's ratio；D is the diameter or side length of loading plate, unit cm；p0For p~S curve inflection point or ultimate load point
Load, unit kPa；S0For p0Corresponding sedimentation value.
Further, the rectangular region that size is greater than construction machinery is chosen in counter-force bridge zone domain.
Further, the gradient on native stone gentle slope is less than 20 °, the hole to bench edge distance ground level 40-60cm on native stone gentle slope.
Further, support pier lays one along every 3 meters of counter-force bridge zone domain side length.
Further, longitudinal bearing beam is erected in corresponding support earnestly, and lateral bearing beam is vertical with longitudinal bearing beam, frame
It is located between multiple longitudinal bearing beams and steel plate.
Further, the quality of construction machinery is greater than 20 tons.
Further, construction machinery is using fully loaded truck or bull-dozer.
Further, displacement is calculated as two, is symmetrically disposed near test measuring point.
Beneficial effects of the present invention:
The present invention is obvious to the improved efficiency of Large Field load test, and all components in addition to data-detection apparatus are
The common material in civil engineering scene or equipment, reduce preparation and the implementation cost of test.
Other features and advantages of the present invention will then part of the detailed description can be specified.
Detailed description of the invention
Exemplary embodiment of the invention is described in more detail in conjunction with the accompanying drawings, it is of the invention above-mentioned and its
Its purpose, feature and advantage will be apparent, wherein in exemplary embodiment of the invention, identical reference label
Typically represent same parts.
Fig. 1 is overall structure of the present invention
In figure: the domain of 1- counter-force bridge zone；2- soil stone gentle slope；3- support is honest；The longitudinal direction 4- bearing beam；5- transverse direction bearing beam；6- steel
Plate；7- loading plate；8- hydraulic jack；9- displacement measurement bar；10- displacement meter；11- construction machinery.
Specific embodiment
The preferred embodiment that the present invention will be described in more detail below with reference to accompanying drawings.Although showing the present invention in attached drawing
Preferred embodiment, however, it is to be appreciated that may be realized in various forms the present invention without the embodiment party that should be illustrated here
Formula is limited.
A kind of convenient and fast Large Field load testing method, comprising the following steps:
Step 1: marking off counter-force bridge zone domain 1 in foundation surface to be measured, choose the rectangle that size is greater than construction machinery
Domain；
Step 2: the both ends heap in counter-force bridge zone domain 1 bankets stone gentle slope 2；For the gradient on native stone gentle slope 2 less than 20 °, native stone is slow
The hole to bench edge distance ground level 40-60cm on slope 2；
Step 3: being stacked into several using I-steel and support honest 3, and set up lateral bearing beam 5 in support honest 3 and indulge
To bearing beam 4, and steel plate 6 is covered above aforementioned bearing beam and forms counter-force bridge loading end；Such as: support pier 3 is along counter-force bridge zone
Every 3 meters of 1 side length of domain are laid one；It is erected in corresponding support honest 3 using I-steel longitudinal direction bearing beam, I-steel transverse direction load
Beam is vertical with I-steel longitudinal direction bearing beam, and I-steel transverse direction bearing beam is erected between multiple longitudinal bearing beams 4 and steel plate 6.
Step 4: the center setting test measuring point in counter-force bridge zone domain 1 is set up between measuring point ground and longitudinal bearing beam 4
Loading plate 7 and jack 8, place displacement measurement bar 9 and displacement meter 10, aforementioned displacements meter 10 are placed on loading plate 7；Displacement meter 10
It can be set to two, be symmetrically disposed near test measuring point, when calculating, take moving average；
Step 5: anti-by being formed in the traveling of construction machinery 11 to the steel plate 6 of 1 top of counter-force bridge zone domain of the quality greater than 20 tons
Power；Aforementioned construction machinery 11 is using fully loaded truck or bull-dozer；
Step 6: multistage load progress load test being applied by hydraulic jack 8 and reads corresponding load loading plate 7
Sedimentation；
Step 7: according to 7 settling data of loads at different levels and corresponding loading plate of step 6 acquisition, drawing performance sedimentation and erect
To p~S curve of relationship between load, provide to determine foundation bearing capacity basic value according to " earthwork test rule SL237-1999 "
f0；
Step 8: according to the p~S curve drawn in step 7, calculating the deformation modulus E of measuring point0；
In formula: E0For wet environment modulus, unit kPa；M is the form parameter of loading plate 7, and circle is 0.79, rectangular to be
0.89；μ is material Poisson's ratio；D is the diameter or side length of loading plate 7, unit cm；p0For p~S curve inflection point or ultimate load point
Load, unit kPa；S0For p0Corresponding sedimentation value.
Load testing method of the invention reduces preparation and the implementation cost of test, easy to operate, accuracy is high, stablizes
Property is good；Solve and need the heaps loading such as a large amount of earth bag and prefabricated section in the past, the filling of heap loading, stacking and disassembly expend compared with
The problem of more manpower and material resources and time.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.
Claims (9)
1. a kind of convenient and fast Large Field load testing method, which comprises the following steps:
Step 1: marking off counter-force bridge zone domain (1) in foundation surface to be measured；
Step 2: the both ends heap in counter-force bridge zone domain (1) bankets stone gentle slope (2)；
Step 3: be stacked into several using I-steel and support honest (3), and set up on supporting honest (3) lateral bearing beam (5) and
Longitudinal bearing beam (4), and cover steel plate (6) above aforementioned bearing beam and form counter-force bridge loading end；
Step 4: the center setting test measuring point in counter-force bridge zone domain (1) is set up between measuring point ground and longitudinal bearing beam (4)
Loading plate (7) and jack (8), place displacement measurement bar (9) and displacement meter (10), aforementioned displacements meter (10) are placed in loading plate
(7) on；
Step 5: counter-force will be formed in construction machinery (11) traveling to the steel plate (6) above counter-force bridge zone domain (1)；
Step 6: applying multistage load progress load test by hydraulic jack (8) and read corresponding load loading plate (7)
Sedimentation；
Step 7: the loads at different levels and corresponding loading plate (7) settling data obtained according to step 6, draw performance sedimentation with it is vertical
P~S curve of relationship between load provides to determine foundation bearing capacity basic value f according to " earthwork test rule SL237-1999 "0；
Step 8: according to the p~S curve drawn in step 7, calculating the deformation modulus E of measuring point0；
In formula: E0For wet environment modulus, unit kPa；M is the form parameter of loading plate (7), and circle is 0.79, rectangular to be
0.89；μ is material Poisson's ratio；D is the diameter or side length of loading plate (7), unit cm；p0For p~S curve inflection point or ultimate load
The load of point, unit kPa；S0For p0Corresponding sedimentation value.
2. convenient and fast Large Field load testing method according to claim 1, which is characterized in that counter-force bridge zone domain (1)
Choose the rectangular region that size is greater than construction machinery.
3. convenient and fast Large Field load testing method according to claim 1, which is characterized in that native stone gentle slope (2)
The gradient is less than 20 °, the hole to bench edge distance ground level 40-60cm of native stone gentle slope (2).
4. convenient and fast Large Field load testing method according to claim 1, which is characterized in that support pier (3) is along anti-
Every 3 meters of power bridge zone domain (1) side length are laid one.
5. convenient and fast Large Field load testing method according to claim 1, which is characterized in that longitudinal bearing beam (4)
It is erected in corresponding support honest (3), lateral bearing beam (5) is vertical with longitudinal bearing beam (4), is erected at multiple longitudinal bearing beams
(4) between steel plate (6).
6. convenient and fast Large Field load testing method according to claim 5, which is characterized in that lateral bearing beam (5)
I-steel is all made of with longitudinal bearing beam (4).
7. convenient and fast Large Field load testing method according to claim 1, which is characterized in that construction machinery (11)
Quality is greater than 20 tons.
8. convenient and fast Large Field load testing method according to claim 7, which is characterized in that construction machinery (11) is adopted
With fully loaded truck or bull-dozer.
9. convenient and fast Large Field load testing method according to claim 1, which is characterized in that displacement meter (10) is two
It is a, it is symmetrically disposed near test measuring point.
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| CN201910355452.4A CN110206006A (en) | 2019-04-29 | 2019-04-29 | A kind of convenient and fast Large Field load testing method |
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| CN201910355452.4A CN110206006A (en) | 2019-04-29 | 2019-04-29 | A kind of convenient and fast Large Field load testing method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112359887A (en) * | 2020-11-19 | 2021-02-12 | 铜陵有色金属集团铜冠建筑安装股份有限公司 | Shallow foundation bearing capacity test device and method based on large equipment |
| CN113587898A (en) * | 2021-07-22 | 2021-11-02 | 中冶集团武汉勘察研究院有限公司 | Method for determining settlement correction coefficient of soft soil area |
| CN114112685A (en) * | 2021-12-29 | 2022-03-01 | 国网新源控股有限公司 | Method for determining early-stage consolidation stress of on-site compacted soil-rock mixture |
| CN114279859A (en) * | 2022-02-21 | 2022-04-05 | 中国电建集团西北勘测设计研究院有限公司 | On-site test method for measuring deformation modulus of soil and stone materials |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112359887A (en) * | 2020-11-19 | 2021-02-12 | 铜陵有色金属集团铜冠建筑安装股份有限公司 | Shallow foundation bearing capacity test device and method based on large equipment |
| CN113587898A (en) * | 2021-07-22 | 2021-11-02 | 中冶集团武汉勘察研究院有限公司 | Method for determining settlement correction coefficient of soft soil area |
| CN113587898B (en) * | 2021-07-22 | 2023-02-28 | 中冶集团武汉勘察研究院有限公司 | Method for determining settlement correction coefficient of soft soil area |
| CN114112685A (en) * | 2021-12-29 | 2022-03-01 | 国网新源控股有限公司 | Method for determining early-stage consolidation stress of on-site compacted soil-rock mixture |
| CN114279859A (en) * | 2022-02-21 | 2022-04-05 | 中国电建集团西北勘测设计研究院有限公司 | On-site test method for measuring deformation modulus of soil and stone materials |
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Application publication date: 20190906 |