CN209585136U - A kind of simulation open caisson does not drain the experimental provision of suck sediment subsidence - Google Patents
A kind of simulation open caisson does not drain the experimental provision of suck sediment subsidence Download PDFInfo
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- CN209585136U CN209585136U CN201822090217.2U CN201822090217U CN209585136U CN 209585136 U CN209585136 U CN 209585136U CN 201822090217 U CN201822090217 U CN 201822090217U CN 209585136 U CN209585136 U CN 209585136U
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- open caisson
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- water
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Abstract
The utility model discloses the experimental provisions that a kind of simulation open caisson does not drain suck sediment subsidence, including open caisson model, data collection system, data logger, the solid-liquid circulatory system, trapezoidal framework type station and model slot.In solid-liquid circulatory system operational process, well sinking, data collection system is connect by pipeline with data logger, acquire open caisson horizontal displacement, vertical displacement, interstitial hydraulic pressure variation, soil pressure variation, well sinking posture, soil internal horizontal displacement, vertical displacement and interstitial hydraulic pressure variation and the data such as the horizontal displacement of riverbed face and vertical displacement.The beneficial effects of the utility model are, providing for solve the problems, such as big section deep water Sinking Well Design, sink etc. can experimental data for reference.
Description
Technical field
The utility model relates to well sinking technical field in civil construction, in particular to a kind of simulation open caisson does not drain suction
The experimental provision that mud sinks.
Background technique
Well foundation has many advantages, such as that big bearing capacity, good integrity and settling amount are small, is chiefly used in various industrial buildings and people
Preventing engineering.But in order to meet the requirement of increasingly developed national sustained economic development, the scale day of infrastructural project project
Benefit increases, and open caisson is gradually used in the engineerings such as large span deep-water bridge, underground hole group, deep big basis.Although well foundation exists
Usage history in engineering is long-standing, but most of well foundation is chiefly used in pipe engineering in city etc., open caisson size
Smaller, sinking watching is relatively easy to.And there is still a need for numerous studies for big sectional dimension deep water Sinking Well Design and sinker technique.
Utility model content
During the utility model is it is intended that study well sinking, open caisson attitudes vibration, open caisson surrounding soil Transport
Experimental provision is provided.
The technical solution of the utility model is as follows: a kind of simulation open caisson does not drain the experimental provision of suck sediment subsidence,
Including model slot (2)；The bottom of the model slot (2) is equipped with sand bedding course, fills out after covering waterproof cloth on sand bedding course
Enter to test sand and be compacted be the soil body, the water surface is higher by the soil body after being filled to saturation later；
It further include open caisson (4)；The lower part of the open caisson (4) is placed in the soil body in the middle part of model slot (2), including is enclosed
The four sides borehole wall of rectangle wellhole, every face borehole wall is used as inner well wall in blade foot splicing by two blocks of steel plates, and sword is arranged in bottom
Foot-operated face fills counterweight sand between inner well wall；Any one angle point at the top of open caisson (4) is provided with laser displacement gauge (5), angle
The midpoint of the point two sides borehole wall is also respectively provided with inclinator (6)；The outer borehole wall of open caisson (4) is by multiple sections are highly divided into, each
Measuring points, each measuring points such as section setting include earth pressure gauge (19) and pore pressure gauge (20)；
It further include three pore pressure meter groups；The pore pressure meter group is more on pore pressure fixed frame (13) including being from top to bottom fixed on
A pore pressure meter (3)；Three pore pressure meter groups are embedded vertically in the soil body of model slot (2), are located at three wells of open caisson (4)
The outside of wall；
It further include multiple riverbed face land movement meters (14)；The multiple riverbed face land movement meter (14) and open caisson (4)
The distance of the outer borehole wall be linearly distributed；Miniature inclinator is fixed on riverbed face land movement meter (14), and passing through can be lateral
The runner of rotation is connected to the side of displacement meter bracket (7), and offsets after its bottom insertion cork pad with soil body upper surface；
It further include multiple soil body intrinsic displacement meters (15)；The outer borehole wall of the multiple soil body intrinsic displacement meter (15) and open caisson (4)
Distance be linearly distributed；Soil body intrinsic displacement meter (15) is connected to the vertical rails of displacement meter bracket (7) other side by sliding block
(16), sliding block can be moved up and down and be locked in vertical rails (16)；The bottom of soil body intrinsic displacement meter (15) and elongated hollow aluminium bar
(17) upper end offsets, and the lower part of elongated hollow aluminium bar (17) is inserted into the soil body and external suit hollow aluminum casing (18), carefully
The lower end of long hollow aluminium bar (17) is additionally provided with gasket；
It further include sand pump and back water pump, the sand pump and back water pump are connected separately with frequency converter；The water inlet of sand pump
Mouth is connected to the wellhole of open caisson (4), and water outlet is connected to the water inlet of water tank (12), and the water outlet of water tank (12) is connected to return water
The water inlet of pump, the water outlet of back water pump are connected to the wellhole of open caisson (4)；Between the inlet and outlet of the water tank (12)
It is additionally provided with filter sand net (11).
It further, further include trapezoidal framework type station (8)；The top surface of the trapezoidal framework type station (8) is located at
On soil body upper surface, holding force point is located at the bottom of model slot (2).
The beneficial effects of the utility model are, provide for solve the problems, such as big section deep water Sinking Well Design, sink etc.
It can experimental data for reference.
Detailed description of the invention
Fig. 1 is the sectional view of experimental provision；
Fig. 2 is the sectional view of open caisson；
Fig. 3 is the top view of open caisson；
Fig. 4 is the top view of the integral layout of experimental provision；
Fig. 5 is the side view of trapezoidal framework type station；
Fig. 6 is the layout of riverbed face land movement meter and soil body intrinsic displacement meter；
Fig. 7 is the layout (top view) of earth pressure gauge and pore pressure gauge；
Fig. 8 is the layout (side view) of earth pressure gauge and pore pressure gauge.
In figure, 1- data collection system, 2- model slot, 3- pore pressure meter, 4- open caisson, 5- laser displacement gauge, 6- inclinator, 7-
Displacement meter bracket, 8- trapezoidal framework type station, 9- water pipe, 10- sand pump, 101- back water pump, 11- filter sand net, 12- water tank,
13- pore pressure meter fixed frame, the riverbed 14- face land movement meter, 15- soil body intrinsic displacement meter, 16- sliding rail, 17- elongated hollow aluminium bar,
The hollow aluminum casing of 18-, 19- earth pressure gauge, 20- pore pressure gauge.
Specific embodiment
Specific embodiment of the present utility model is further illustrated below in conjunction with attached drawing.
A kind of simulation open caisson does not drain the experimental provision of suck sediment subsidence, integral layout as shown in figure 4, include open caisson model,
Data collection system, data logger, the solid-liquid circulatory system, trapezoidal framework type station and model slot.Solid-liquid circulatory system fortune
During row, well sinking, data collection system connect by pipeline with data logger, acquires open caisson horizontal displacement, vertically
Displacement, interstitial hydraulic pressure variation, soil pressure variation, well sinking posture, soil internal horizontal displacement, vertical displacement and interstitial water
Pressure change and the data such as the horizontal displacement of riverbed face and vertical displacement.
Such as Fig. 1, model channel mould intends the river of well sinking, and trench bottom is laid with certain thickness sand bedding course, re-lays and sink
The PVC waterproof cloth waterproof of shaft bottom face equidimension simulates the soil layer that do not cut by well sinking under riverbed.Layering filling experiment sand, and
Layer of sand is compacted with electronic tamping machine.After the completion of banketing, liquid level is added water into model slot and is higher by the soil body, three days are stood, wait test
It is added water after sand is sufficiently saturated, before experiment to the above 0.1m in native surface.
In the south, west, north side of open caisson, several sets of apertures pressure meter is buried respectively at a certain distance from the outside of side wall midpoint, it is each
Group pore pressure meter is separated by a distance in vertical direction, and is fixed on pore pressure fixed frame, prevents pore pressure meter by sinking watching
The influence of middle soil body migration, hydraulic gradient variation when measurement is sunk around open caisson.
Open caisson model is as shown in Figure 2 and Figure 3, is spliced by two blocks of steel plates in blade foot and is used as the inside and outside borehole wall, and splicing seams are fully welded
Water-proofing treatment.It can back-up sand soil progress counterweight between the inside and outside borehole wall.Bottom blade foot and blade foot tyre tread is arranged in open caisson model, and among model
Wellhole is set.
Data logger includes laser displacement gauge, inclinator, bracket displacement meter, pore pressure meter, earth pressure gauge and pore water pressure
Power meter etc..
Laser displacement gauge is arranged on the angle point of open caisson top surface, can accurately measure open caisson vertical displacement, monitoring frequency is greater than
1Hz.Inclinator is arranged on the midpoint of open caisson side wall top surface, for measuring the inclination angle during well sinking, with laser displacement gauge
The open caisson vertical displacement of measurement together, determines the spatial attitude of well sinking.
Bracket displacement meter includes riverbed face displacement meter and soil body intrinsic displacement meter, is installed on displacement meter bracket.Bracket position
The arrangement for moving meter is as shown in Figure 6.
Displacement meter bracket, bracket side fixed rack is arranged in model slot southern side, and soil body intrinsic displacement meter is fixed on sliding block
On, according to Position Number, the distance away from the borehole wall outside open caisson is changed linearly, and sliding block can be moved up and down and be locked.Soil body intrinsic displacement
Meter bottom offsets with elongated hollow aluminium bar, can bend, and one section is previously inserted before experiment to soil body the inside.The setting of aluminium bar bottom
Diameter 2cm ring washer prevents aluminium bar is excessively lower from boring.Hollow aluminum casing is set outside aluminium bar, guarantees that aluminium bar can occur laterally with the soil body
Displacement, while preventing aluminium bar from excessive deflection occurs in end.It is native around open caisson during soil body intrinsic displacement meter measures well sinking
Intracorporal change in displacement.
Riverbed face land movement meter, according to Position Number, the distance away from the borehole wall outside open caisson is arranged in the displacement meter bracket other side
Linear distribution, riverbed face land movement meter bottom offset after being inserted into cork pad with native face.Riverbed face land movement meter and bracket
Between setting can lateral rotation idler wheel, guarantee that displacement meter can be migrated with the soil body and rotate, and fix on the displacement meter micro-
Type inclinator, the angle of measurement riverbed face land movement meter rotation.
Earth pressure gauge and pore pressure gauge arrangement are as shown in Figure 7 and Figure 8.In open caisson side wall by being highly divided into several sections
Face, the measuring points such as each section setting, each measuring point include earth pressure gauge and pore pressure gauge, and apart from open caisson certain distance
Pore pressure meter together, measure well sinking during, open caisson nearby the soil body effective stress variation.When installation, by open caisson
Outer steel shell bottom and the outer borehole wall are punched out, insertion earth pressure gauge and pore pressure gauge on open caisson side wall, outside surface and steel
Shell is concordant, with welding glue sticking, and makees water-proofing treatment to gap with neutral silica gel.
Such as Fig. 4, solid-liquid circulatory system control open caisson does not drain suck sediment subsidence, including frequency converter, sand pump, back water pump,
Water tank and filter sand net, sand aqueous mixtures in wellhole are pumped into water tank by sand pump, after flowing through filter sand net, then by back water pump are drawn back water
In open caisson, liquid level inside and outside open caisson is made to remain consistent substantially.Sand pump and back water pump, can respectively by Frequency Converter Control take out sand or
Pumping rate.Speed regulating control is carried out with frequency converter, valve is set at inlet and outlet nozzle, it is ensured that liquid level is almost the same inside and outside open caisson,
Live open caisson suck sediment subsidence process is simulated with as true as possible.
Such as Fig. 5, trapezoidal framework type operation countertop is concordant with the face of banketing, and holding force point is located at model trench bottom, is not influencing
Influence of the additional stress of operator's self gravity generation to the soil body is reduced while the soil body migrates.
Claims (2)
1. the experimental provision that a kind of simulation open caisson does not drain suck sediment subsidence, which is characterized in that
Including model slot (2)；The bottom of the model slot (2) is equipped with sand bedding course, inserts in fact after waterproof cloth is covered on sand bedding course
It tests sand and is compacted be the soil body, the water surface is higher by the soil body after being filled to saturation later；
It further include open caisson (4)；The lower part of the open caisson (4) is placed in the soil body in the middle part of model slot (2), including is enclosed rectangular
The four sides borehole wall of wellhole, every face borehole wall is used as inner well wall in blade foot splicing by two blocks of steel plates, and bottom setting blade foot is stepped on
Counterweight sand is filled in face between inner well wall；Any one angle point at the top of open caisson (4) is provided with laser displacement gauge (5), angle point two
The midpoint of the side borehole wall is also respectively provided with inclinator (6)；The outer borehole wall of open caisson (4) is by being highly divided into multiple sections, each section
Measuring points, each measuring points such as setting include earth pressure gauge (19) and pore pressure gauge (20)；
It further include three pore pressure meter groups；The pore pressure meter group includes the multiple holes being from top to bottom fixed on pore pressure fixed frame (13)
Pressure meter (3)；Three pore pressure meter groups are embedded vertically in the soil body of model slot (2), are located at three boreholes wall of open caisson (4)
Outside；
It further include multiple riverbed face land movement meters (14)；The multiple riverbed face land movement meter (14) is outer with open caisson (4)
The distance of the borehole wall is linearly distributed；Miniature inclinator is fixed on riverbed face land movement meter (14), and passing through can lateral rotation
Runner be connected to the sides of displacement meter bracket (7), and offset after its bottom insertion cork pad with soil body upper surface；
It further include multiple soil body intrinsic displacement meters (15)；The outer borehole wall of the multiple soil body intrinsic displacement meter (15) and open caisson (4) away from
From linear distribution；Soil body intrinsic displacement meter (15) is connected to the vertical rails (16) of displacement meter bracket (7) other side by sliding block,
Sliding block can be moved up and down and be locked in vertical rails (16)；The bottom of soil body intrinsic displacement meter (15) and elongated hollow aluminium bar (17)
Upper end offsets, and the lower part of elongated hollow aluminium bar (17) is inserted into the soil body and external suit hollow aluminum casing (18), elongated hollow
The lower end of aluminium bar (17) is additionally provided with gasket；
It further include sand pump and back water pump, the sand pump and back water pump are connected separately with frequency converter；The water inlet of sand pump connects
It is connected to the wellhole of open caisson (4), water outlet is connected to the water inlet of water tank (12), and the water outlet of water tank (12) is connected to back water pump
Water inlet, the water outlet of back water pump are connected to the wellhole of open caisson (4)；It is also set between the inlet and outlet of the water tank (12)
It is equipped with filter sand net (11).
2. the experimental provision that a kind of simulation open caisson as described in claim 1 does not drain suck sediment subsidence, which is characterized in that further include
Trapezoidal framework type station (8)；The top surface of the trapezoidal framework type station (8) is located on soil body upper surface, holding force point
In the bottom of model slot (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822090217.2U CN209585136U (en) | 2018-12-13 | 2018-12-13 | A kind of simulation open caisson does not drain the experimental provision of suck sediment subsidence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822090217.2U CN209585136U (en) | 2018-12-13 | 2018-12-13 | A kind of simulation open caisson does not drain the experimental provision of suck sediment subsidence |
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| Publication Number | Publication Date |
|---|---|
| CN209585136U true CN209585136U (en) | 2019-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822090217.2U Expired - Fee Related CN209585136U (en) | 2018-12-13 | 2018-12-13 | A kind of simulation open caisson does not drain the experimental provision of suck sediment subsidence |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109537648A (en) * | 2018-12-13 | 2019-03-29 | 西南交通大学 | A kind of simulation open caisson does not drain the experimental provision of suck sediment subsidence |
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2018
- 2018-12-13 CN CN201822090217.2U patent/CN209585136U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109537648A (en) * | 2018-12-13 | 2019-03-29 | 西南交通大学 | A kind of simulation open caisson does not drain the experimental provision of suck sediment subsidence |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191105 Termination date: 20201213 |
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| CF01 | Termination of patent right due to non-payment of annual fee |