CN106223374A - A kind of assay device simulating multiaspect deep foundation pit construction character - Google Patents
A kind of assay device simulating multiaspect deep foundation pit construction character Download PDFInfo
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- CN106223374A CN106223374A CN201610794335.4A CN201610794335A CN106223374A CN 106223374 A CN106223374 A CN 106223374A CN 201610794335 A CN201610794335 A CN 201610794335A CN 106223374 A CN106223374 A CN 106223374A
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
- E02B1/02—Hydraulic models
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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Abstract
The present invention relates to a kind of assay device simulating multiaspect deep foundation pit construction character, belong to deep basal pit and underground engineering construction safety and field of environment protection.This assay device includes model casing and multiple sensors, it is provided with the soil body in model casing body, the soil body is provided with polylith mould plate, foundation ditch is formed between polylith mould plate, at least support member it is provided with in foundation ditch, the two ends of support member are respectively held against two block models plates, the the first river model groove and the second river model groove being interconnected it is provided with in model casing body, first river model groove and the second river model groove are respectively arranged at the both sides of foundation ditch and connect with foundation ditch, between foundation ditch and the second river model groove, there is gap, multiple sensors are respectively arranged at the soil body and polylith mould plate.This device can act on lower deep pit construction deformation and stability disruption character by border on the river water level and asymmetric soil pressure load of visual simulation jointly, and simple in construction, function are easy, have higher economy and repeatability.
Description
Technical field
The present invention relates to deep basal pit and underground engineering construction safety and field of environment protection, be specifically related to a kind of simulation multiaspect
The assay device of deep foundation pit construction character.
Background technology
In recent years, along with the gradually development of the industries such as urban construction and water conservancy traffic, substantial amounts of deep basal pit is created
Engineering, and often build underground engineering project adjacent to river with lake, the base pit engineering of the excavation construction that borders on the river inevitably is subject to
Groundwater condition changes the impact causing seepage flow and non-symmetrical load, and its design and construction difficulty is bigger, the control to surrounding
To be stricter.Weak soil borders on the river the deep-foundation pit engineering excavation construction in place, and under the conditions of particularly multiaspect borders on the river, subsoil water is directly joined
Act on the end, hole, careless slightly by generation groundwater infiltration destruction, soil body slipping unstability, bottom heave resilience, deflection
And unload problems such as being broken, even cause the most built residential building to produce inclination, crack and fall damage, cause the people tight
The life and property loss of weight.
But the most theoretical analysis and engineering calculation are still by base pit stability and Supporting Structure deformation and hole
The impact of end pile foundation bearing characters separately assessment, relies on limiting equilibrium method to carry out estimating stability of foundation pit under excavation state and ignoring underground
Hole end stability under water effect and the impact on pile foundation thereof, analysis theories does not meets soil body actual loading action condition, has
The biggest randomness.In particular for weak soil deep foundation pit excavation construction Deformation Prediction and stability analysis problem, existing grind
Study carefully the groundwater infiltration stability analysis being concentrated mainly under usual terms to calculate with Supporting Structure deformation prediction, lack directly perceived practical
Indoor model test analyze method, the experimentation cost of engineering construction scene is high, the most remote and inefficiency, and engineering construction is not
Allow to reach collapse state, it is impossible to carry out stability failure mechanism and analyze and safety problem prediction.
Summary of the invention
It is an object of the invention to provide a kind of assay device simulating multiaspect deep foundation pit construction character, shape can be simulated
Become deep basal pit and close on river waterpower and geological conditions, it was predicted that the excavation deformation that multiaspect borders on the river destroys with stability,
Its simple in construction, function are easy, and test effect is directly perceived, accurate, have higher economy with repeatable.
The present invention solves it and technical problem is that and realize by the following technical solutions.
The present invention proposes a kind of assay device simulating multiaspect deep foundation pit construction character, and it includes that model casing is with many
Individual sensor, is provided with the soil body in model casing body, the soil body is provided with polylith mould plate, forms foundation ditch, foundation ditch between polylith mould plate
Inside being provided with at least support member, the two ends of support member are respectively held against two block models plates, be provided with and interconnect mutually in model casing body
The first logical river model groove and the second river model groove, the first river model groove and the second river model groove are respectively arranged at base
Hole both sides and connect with foundation ditch, there is between foundation ditch and the second river model groove gap, multiple sensors are respectively arranged at soil
Body and polylith mould plate.
Further, in present pre-ferred embodiments, in model casing body, it is provided with the first dividing plate, the first dividing plate and model
The inwall of casing surrounds the first river model groove；Polylith mould plate includes the first mould plate and the second mould plate, the first mould plate
One end and one end of the second mould plate be all connected with the side away from the first river model groove of the first dividing plate, the first model
The other end of plate and the other end of the second mould plate all inwalls with model casing are connected and at the first mould plate and the second mould
Foundation ditch is formed between template；Be provided with second partition in model casing body, the two ends of second partition respectively with the first dividing plate and mould
The inwall of molding box body connects and is formed between the inwall of the first dividing plate and model casing the second river model groove, second partition with
Gap is formed between the second mould plate.
Further, in present pre-ferred embodiments, the inwall of second partition and the first dividing plate and model casing is equal
Removably connect.
Further, in present pre-ferred embodiments, the first river model groove is away from the one of the second river model groove
End be provided with the 3rd dividing plate, between the 3rd dividing plate, the first dividing plate and the inwall of model casing formed water tank, water tank be communicated with into
Water pipe, water inlet pipe is provided with water flow control valve, and the first dividing plate, second partition and the 3rd dividing plate are provided with limbers.
Further, in present pre-ferred embodiments, limbers is provided with defecator.
Further, in present pre-ferred embodiments, defecator is gauze.
Further, in present pre-ferred embodiments, the first river model groove be provided with the first spilled water hole and be equipped with
The first stopple that first spilled water hole coordinates, the second river model groove is provided with the second spilled water hole being equipped with and coordinates with the second spilled water hole
The second stopple.
The soil body further, in present pre-ferred embodiments, in the first river model groove and the second river model groove
It is respectively clay layer, fine sand layer, silt soil strata and mud from the bottom to top；The soil body in foundation ditch is respectively clay from the bottom to top
Layer, fine sand layer, silt soil strata.
Further, in present pre-ferred embodiments, the soil body of the side away from the second mould plate of the first mould plate
Earth volume more than the earth volume of the soil body in gap.
Further, in present pre-ferred embodiments, assay device also includes the bat for record cast casing state
According to equipment.
The assay device of the simulation multiaspect deep foundation pit construction character of the embodiment of the present invention provides the benefit that:
The assay device of this simulation multiaspect deep foundation pit construction character, is respectively equipped with in model casing body and is interconnected
First river model groove and the second river model groove, in process of the test, by regulating the first river model groove, the second river model
Flowing water in groove reaches the water level of test requirements document to simulate true river.This assay device mould plate simulates actual foundation ditch
Braced wall, support member is simulated actual foundation ditch and is supported, and lays the soil body simultaneously and be mounted with not same-action in foundation ditch with model casing body
Sensor, so that changes various produced by foundation ditch under different condition to be tested, obtain concrete physical mechanics property the most intuitively
Prime number evidence.This assay device can be simulated formation deep basal pit and close on river waterpower and geological conditions, it was predicted that the foundation ditch that multiaspect borders on the river
Excavation construction deformation destroys with stability, and its simple in construction, function are easy, and test effect intuitively, accurately, has higher economy
Property with repeatable.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below by embodiment required use attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, and it is right to be therefore not construed as
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to this
A little accompanying drawings obtain other relevant accompanying drawings.
The top view of the assay device of the simulation multiaspect deep foundation pit construction character that Fig. 1 provides for the embodiment of the present invention；
The front view of the assay device of the simulation multiaspect deep foundation pit construction character that Fig. 2 provides for the embodiment of the present invention；
First sluicing of the assay device of the simulation multiaspect deep foundation pit construction character that Fig. 3 provides for the embodiment of the present invention
The structural representation in hole；
Second sluicing of the assay device of the simulation multiaspect deep foundation pit construction character that Fig. 4 provides for the embodiment of the present invention
The structural representation in hole；
First rubber in the assay device of the simulation multiaspect deep foundation pit construction character that Fig. 5 provides for the embodiment of the present invention
Stopple and the structural representation of the second rubber stopple；
Water tank in the assay device of the simulation multiaspect deep foundation pit construction character that Fig. 6 provides for the embodiment of the present invention
Front view；
Limbers in the assay device of the simulation multiaspect deep foundation pit construction character that Fig. 7 provides for the embodiment of the present invention
Structural representation.
The assay device of icon: 100-simulation multiaspect deep foundation pit construction character；200-model casing；300-senses
Device；400-foundation ditch；500-the first river model groove；600-the second river model groove；700-water tank；800-photographing device；
210-the first side plate；220-the second side plate；230-the 3rd side plate；240-the 4th side plate；250-base plate；211-the first spilled water hole；
213-the first rubber stopple；221-the second spilled water hole；223-the second rubber stopple；The 260-soil body；310-earth pressure gauge；320-hole
Gap WG；330-foil gauge；340-displacement meter；510-the first dividing plate；520-second partition；530-the 3rd dividing plate；540-
Limbers；410-the first mould plate；420-the second mould plate；430-support member；710-water inlet pipe；720-water flow control valve.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is
The a part of embodiment of the present invention rather than whole embodiments.Generally implement with the present invention illustrated described in accompanying drawing herein
The assembly of example can be arranged with various different configurations and design.
Therefore, detailed description to the embodiments of the invention provided in the accompanying drawings is not intended to limit claimed below
The scope of the present invention, but be merely representative of the selected embodiment of the present invention.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under not making creative work premise, broadly falls into the model of present invention protection
Enclose.
In describing the invention, it should be noted that term " on ", D score, "left", "right", " vertically ", " interior ",
Orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, or this invention product uses
Time the orientation usually put or position relationship, be for only for ease of the description present invention and simplifying and describe rather than instruction or hint
The device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
The restriction of invention.Additionally, term " first ", " second ", " the 3rd ", " the 4th " are only used for distinguishing and describe, and it is not intended that refer to
Show or imply relative importance.
Additionally, the term such as term " level ", " vertically " is not offered as requiring parts abswolute level or vertical, but can be slightly
Low dip.As " level " only refers to for its direction relatively " vertically " more level, it is not that this structure of expression must be complete
Full level, but can be slightly tilted.
In describing the invention, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " arrange ",
" connect " and should be interpreted broadly, connect for example, it may be fixing, it is also possible to be to removably connect, or be integrally connected；Can be
It is mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal.For the ordinary skill in the art, can understand that above-mentioned term is in the present invention with concrete condition
In concrete meaning.
The assay device 100 that the present invention simulates multiaspect deep foundation pit construction character below in conjunction with embodiment has
Body explanation.
Please with reference to Fig. 1 and Fig. 2, the present embodiment provides a kind of test dress simulating multiaspect deep foundation pit construction character
Putting 100, it includes model casing 200, sensor 300 and the photographing device 800 outside model casing 200.
Model casing 200 is first side plate the 210, second side plate the 220, the 3rd side plate the 230, the 4th being connected by head and the tail Guan Bi
Side plate 240 forms four walls, then surrounds the cavity structure of open top with base plate 250.Connection between each side plate and base plate 250
Mode is preferably welding.
Wherein, first side plate the 210, second side plate the 220, the 4th side plate 240 is the most preferably made up of aluminium alloy with base plate 250,
Additionally, also can be by other hard material, such as fiberglass etc..First side plate the 210, second side plate the 220, the 4th side plate 240 and base plate
The thickness of 250 is 50mm, but the concrete chi of the assay device 100 also dependent on this simulation multiaspect deep foundation pit construction character
Very little and demand is adjusted, such as, can be 30mm-60mm.In the present embodiment, the 3rd side plate 230 is made up of safety glass and is
Double-decker, thickness is 10mm, thus meets maximum resistance to compression demand with minimum cost.Additionally, the 3rd side plate 230 can also
It is only the structure of more than monolayer or two-layer.Base plate 250 lower end is welded with the steel plate that thickness is 90mm and reinforces.
Fill out in model casing 200 and be covered with the soil body 260.Preferably, the base plate 250 bottom model casing 200 is equipped with
Thickness is the coarse sand of 100mm, and the particle diameter of coarse sand can be such as 1mm.Space more than coarse sand is filled out by the engineering ground soil body 260
Fill.
The soil body 260 is containing multiple soil layers.For simulating the common situation of real multiaspect Linhe area clay distribution, this enforcement
In example, soil layer includes clay layer, fine sand layer, silt soil strata, mud and mud from the bottom to top, in model casing 200 not
The soil layer difference comprised with the soil body 260 in region.
In the present embodiment, in model casing 200, it is provided with foundation ditch the 400, first river model groove the 500, second river model groove
600 with water tank 700.
Wherein, the first river model groove 500 arrange along the first side plate 210 and by first arranged in model casing 200 every
Plate 510 surrounds with the inwall of model casing 200, and the i.e. first river model groove 500 is respectively with first side plate the 210, second side plate
220, the 4th side plate 240 and the first dividing plate 510 are four sides.Preferably, the width of the first river model groove 500 in the present embodiment
Spend substantially 500mm.
Please with reference to Fig. 3 and Fig. 5, the first side plate 210 of the first river model groove 500 be provided with the first spilled water hole 211 with
And the first rubber stopple 213 coordinated with the first spilled water hole 211.But in addition to rubber stopple, it is also possible to select other the most permissible
Close the parts of spilled water hole.In practical operation, after the first spilled water hole 211 is blocked by the first rubber stopple 213, can be to the first river
In flow model groove 500, infiltration, according to concrete water level demand, also can take out the first rubber stopple 213 and release part water body, with shape
Become different river model groove water levels, and then form the excavation operating mode that borders on the river under various water level.Refer to Fig. 3, relatively
Good, the first spilled water hole 211 is positioned at the first side plate 210 simultaneously near base plate 250 and the region of the second side plate 220.First sluices
The diameter in hole 211 is preferably 60mm, the public rib in the center of circle of the first spilled water hole 211 to the first side plate 210 and the second side plate 220
Distance can be such as 250mm, and the center of circle can be 300mm to the distance of the first side plate 210 with the public rib of base plate 250.First
The design attitude of spilled water hole 211 is because of closer base plate 250, therefore can meet when the first river model groove 500 middle water level is relatively low also
Can sluice.
Further, the first river model groove 500 is provided with the 3rd dividing plate 530 in the one end near the 4th side plate 240, and the 3rd
Water tank 700 is formed between inwall that is the 4th side plate 240 of dividing plate the 530, first dividing plate 510 and model casing 200.
Refer to Fig. 6, the sidewall of water tank 700 has water inlet pipe 710 with the ft connection of model casing 200, the most also sets
Be equipped with control inflow water flow control valve 720, in the present embodiment, water inlet pipe 710 be arranged at water tank 700 left surface namely
4th side plate 240, water flow control valve 720 is placed on water inlet pipe 710, consequently facilitating in time water inlet pipe 710 is flowed into water tank
The discharge of 700 is controlled and regulates.In water tank 700, different water is added from water flow control valve 720 by water inlet pipe 710
The water of position, thus coordinate the first spilled water hole 211 in making the first river model groove 500, to form the river waterpower geology of different high water level
Condition and foundation ditch place of bordering on the river.As preferably, water flow control valve 720 is check valve, and water inlet pipe 710 is connected in water storage device
(not shown), by immersible pump extraction hydrops and in check valve flows to water tank 700, to reach unidirectional water inflow and to prevent from amassing
Aqueous reflux in water tank 700 enters the purpose of water storage device.Additionally, at least one side is transparent area in water tank 700, this is transparent
Face has been sticked rule, preferably steel ruler, thus experimenter can be made to test in time and read the water level in water tank 700.
The soil body 260 in the embodiment of the present invention is provided with polylith mould plate, and foundation ditch 400 is by the polylith being arranged in the soil body 260
Mould plate is formed.Concrete, the mould plate surrounding foundation ditch 400 includes the first mould plate 410 and the second mould plate 420, Qi Zhong
One end of one mould plate 410 and one end of the second mould plate 420 are connected with the first dividing plate 510 of the first river model groove 500,
One end away from the first river model groove 500 of first mould plate 410 and the second mould plate 420 away from the first river model
One end of groove 500 is all connected with the 3rd side plate 230 of model casing 200, and at the first mould plate 410 and the second mould plate 420
Between formed foundation ditch 400, this two block models plate is respectively as the side, two, left and right of foundation ditch 400.The size of foundation ditch 400 is substantially
4500mm × 2000mm × 2900mm (length × width × height), in order to test operation.First mould plate 410 and the second mould plate
420 are preferably aluminium alloy plate, and its thickness obtains according to the conversion of actual pattern foundation pit supporting structure wall.
Foundation ditch 400 is contained within support member 430, support member 430 be arranged at the first mould plate 410 and the second mould plate 420 it
Between, the two ends of support member 430 are respectively held against two block models plates and the first mould plate 410 and the second mould plate 420 are formed support.
The quantity of support member 430 is unique, but multiple more single for, its supporting role can be more firm.Preferably, the present embodiment
In, according to the size of foundation ditch 400, the quantity of its contained support member 430 is 4.Preferably, support member 430 elects aluminium alloy as
Pole, diameter supports conversion by actual foundation ditch and obtains.
In foundation ditch 400 and its outside model casing 200, all soil bodys 260 be clay layer, carefully the most respectively
Layer of sand, silt soil strata.
The the second river model groove 600 connected with the first river model groove 500 it is additionally provided with in model casing 200.And the
One river model groove 500 is respectively arranged at the both sides of foundation ditch 400 and connects with foundation ditch 400 with the second river model groove 600.
Concrete, the second river model groove 600 is arranged along the second side plate 220, is i.e. positioned at foundation ditch 400 near the second side plate
The side of 220.Separated by the first dividing plate 510 between second river model groove 600 and the first river model groove 500.Model casing
Be provided with second partition 520 in 200, the two ends of second partition 520 respectively with in the first dividing plate 510 and model casing 200
Wall connects, and forms the second river model groove 600 between the inwall of the first dividing plate 510 and model casing 200.That is to say, the second river
Flow model groove 600 is four sides with second side plate the 220, the 3rd side plate the 230, first dividing plate 510 and second partition 520 respectively.
Wherein, second partition 520 and the first dividing plate 510 and the inwall of model casing 200, namely the 3rd side plate 230 the most detachably connects
Connect.Preferably, in the present embodiment, width and the first river model groove 500 of the second river model groove 600 are identical, are also 500mm.
Further, the junction of second partition 520 and the first dividing plate 510 and the 3rd side plate 230 has gap, this seam
Gap such as can be filled with rubber blanket, so that second partition 520 can move left and right and can not move forward and backward.
Please with reference to Fig. 4 and Fig. 5, the second side plate 220 of the second river model groove 600 be provided with the second spilled water hole 221 with
And the second rubber stopple 223 coordinated with the second spilled water hole 221.But in addition to rubber stopple, it is also possible to select other the most permissible
Close the parts of spilled water hole.In practical operation, after the second spilled water hole 221 is blocked by the second rubber stopple 223, can be by first
River model groove 500 water filling in the second river model groove 600, according to concrete water level demand, also can take out the second rubber hole
Plug 223 releases part water body, thus cooperatively forms different river model groove water levels from the first river model groove 500.It is also preferred that the left
Refer to Fig. 4, the diameter of the second spilled water hole 221 is preferably 60mm, and it is the most close that the second spilled water hole 221 is positioned at the second side plate 220
Base plate 250 and the region of the first side plate 210.The center of circle of the second spilled water hole 221 is to the first side plate 210 and public affairs of the second side plate 220
The distance of rib can be such as 250mm altogether, and the center of circle to the second side plate 220 with the distance of the public rib of base plate 250 can be
300mm.Design attitude and first spilled water hole 211 of the second spilled water hole 221 are similar to, because of closer base plate 250, therefore when the second river
Also can sluice when model groove 600 middle water level is relatively low.
Having gap between second river model groove 600 and foundation ditch 400, concrete, this gap is at second partition 520 and
Formed between two mould plates 420.
Refer to Fig. 1, the distance between foundation ditch 400 to the 4th side plate 240 be not equal to its to the second river model groove 600 it
Between distance.As preferably, the former distance more than the distance of the latter, that is to say the first mould plate 410 away from the second mould
The earth volume of the soil body 260 of the side of template 420 is more than the earth volume of the soil body 260 in gap, so that on the right side of foundation ditch 400 the
Soil pressure on two mould plates 420 is significantly less than the soil pressure on the first mould plate 410 of left side, thus is formed on foundation ditch 400
Soil pressure is non-symmetrical load, simulates the situation in foundation ditch next-door neighbour river.
Refer to Fig. 7, in order to make shape between water tank the 700, first river model groove 500 and the second river model groove 600
Become the water route that interconnects, make in the soil body 260 that current infiltrate in model casing 200 simultaneously, respectively the first dividing plate 510,
Multiple limbers 540 is offered on second partition 520 and the 3rd dividing plate 530.It is also preferred that the left limbers 540 is offered for two-way interval,
That is to say in orthogonal both direction, such as vertically offer with horizontal direction interval, spacing distance is preferably 100mm,
Limbers 540 diameter such as may be selected to be 5mm.Additionally, in order to prevent foundation ditch the 400, first river model groove 500 and the second river
The soil body 260 in model groove 600 is gone out from limbers 540 by the effect of current, the most respectively at the first dividing plate 510, second
Dividing plate 520 and the limbers 540 surface configuration defecator of the 3rd dividing plate 530, such as, can be gauze.
First dividing plate 510, second partition 520 and the 3rd dividing plate 530 are steel plate, wherein the first dividing plate 510 and the second side
Connected mode between plate 220 and the 4th side plate 240, between second partition 520 and the first dividing plate 510 and the 3rd side plate 230
Connected mode between connected mode, the 3rd dividing plate 530 with the first side plate 210 and the first dividing plate 510 is both preferably and welds.
First river model groove 500 is glutinous with the soil body 260 in described second river model groove 600 the most respectively
Soil layer, fine sand layer, silt soil strata and mud.
In order to obtain the visual data that foundation ditch 400 is affected by the excavation operating mode that borders on the river under different water level, at base
Mould plate surface, the inside of the soil body 260 and the upper surface in hole 400 is respectively arranged with the sensor 300 of not same-action, the most permissible
For detecting the pressure suffered by foundation ditch 400, the pressure it produced including surrounding soil 260 and flowing water, and foundation ditch 400
The produced parameter such as displacement and strain after stress.
Concrete, sensor 300 such as can include earth pressure gauge 310, pore pressure gauge 320, foil gauge 330 and position
Move meter 340.Wherein, earth pressure gauge 310 is embedded in the first mould plate 410 and both sides away from foundation ditch 400 of the second mould plate 420
The soil body 260 internal, and the bottom surface of earth pressure gauge 310 contacts with the first mould plate 410 or the second mould plate 420, is used for surveying
Suffered active earth pressure and passive earth pressure on two mould plates of examination foundation ditch 400, and can be to suffered by this two mould plate
Soil pressure contrast, the foundation ditch or close on the geostatic shield on underground structure foundation pit enclosure wall thus analysis and summary borders on the river
Problem；Pore pressure gauge 320 is embedded in foundation ditch the 400, first river model groove 500 and the soil body of the second river model groove 600
Pore water pressure distribution in 260, under the conditions of testing foundation ditch 400 excavation construction and the SEA LEVEL VARIATION that borders on the river；Foil gauge 330 points
Corresponding surface and second mould plate 420 of the first mould plate 410 both sides uniformly it is not attached to along the direction being perpendicular to base plate 250
The corresponding surface of both sides, for calculating displacement and the moment of flexure situation of change of two block models plates；Displacement meter 340 is embedded in foundation ditch
The soil body 260 surface of the model casing 200 outside 400, is used for detecting the outer soil body of deformation of wall and hole in foundation ditch 400 work progress
The sedimentation situation of 260, it was predicted that the engineering construction environmental effect to Adjacent Buildings, road etc..
For ease of dynamic acquisition the state of record cast casing 200, obtain foundation ditch 400 excavation construction intuitively and accurately
Deformation destroys situation with stability, the assay device 100 of the simulation multiaspect deep foundation pit construction character in the embodiment of the present invention
It is additionally provided with photographing device 800 in model casing 200 outside, returns with the displacement of mould plate, the bottom heave of dynamic acquisition foundation ditch 400
Bullet, foundation ditch 400 sliding rupture and the situations such as the stability closing on river.Preferably, photographing device 800 selects high-definition shooting phase
Machine, and it is positioned at the dead ahead 1.5m of the 3rd side plate 230, the vertical dimension of distance base plate 250 is also 1.5m.
The assay device 100 of above-mentioned simulation multiaspect deep foundation pit construction character, its test process is as follows:
Make foundation ditch 400 and lay in model casing the 200, first river model groove 500 and the second river model groove 600
The soil body 260.When the absolute altitude of the mould plate that the soil body 260 is filled to foundation ditch 400, the first mould plate 410 and the second mould plate 420 is installed
And be respectively arranged earth pressure gauge 310, pore pressure gauge 320, foil gauge 330 and displacement meter 340, and by all the sensors 300
It is external in and tests port accordingly.In water tank 700, add different water level, make water tank 700 and the first river model groove 500
And second river model groove 600 form water-flowing path；Layering consolidates every layer soil body 260 and measures the respective physical power of the soil body 260
Learn character index.After the soil body 260 has consolidated, carrying out the excavation construction simulation of foundation ditch 400, its operation is: excavation ground floor
The soil body 260, add first support member 430, excavation the second layer soil body 260, add second support member 430, the most straight
To digging to the end, hole.By river difference fluctuation in stage and last characteristic, measure the foundation ditch 400 displacement during excavation construction, soil
Pressure, the change of pore pressure and the soil body 260 settle, river slope stability destroys situation.Process of the test keeps high-definition camera
Machine is in continuous duty, dynamic acquisition model deformation picture.
The assay device 100 of above-mentioned simulation multiaspect deep foundation pit construction character, can more conveniently form the deep base that borders on the river
Hole geology and hydraulics, visual simulation border on the river water level jointly act on asymmetric soil pressure load under deep pit construction
Deformation and stability disruption character, it is possible to different soil, surrounding buildings substance environment and water level jacking conditions repeatedly are set, carry out phase
Design, arrangement and method for construction assessment and the forecast analysis of stability failure condition closed, tests effect directly perceived, accurately.
In sum, the assay device 100 of above-mentioned simulation multiaspect deep foundation pit construction character, it is at model casing
In 200 respectively with three pieces of dividing plates every having set out first river model groove the 500, second river model groove 600 and water tank 700, long-pending
Water tank 700 is provided with water inlet pipe 710 and water flow control valve 720, it is possible to control the hydrops in water tank 700 at any time.For making hydrops
Water energy inflow stream flow model groove in case 700 is with model casing 200, and three pieces of baffle surface all offer limbers 540；For joining
Closing the water body in river model groove and can form different water level, two river model grooves are equipped with spilled water hole and stopple.Process of the test
In, if needing high water level, then can use stopple to block spilled water hole, making the water in water tank 700 flow in river model groove, reaching corresponding
Water flow control valve 720 is closed after water level；If the low water level of need, then can open stopple, make the water in river model groove pass through spilled water hole
Flow out, as little as during required water level, stopple is blocked spilled water hole.Foundation ditch 400 is replaced actual pattern foundation pit supporting structure by two mould plates
Wall, is provided with the support member 430 replacing actual foundation ditch to support, thus realizes the simulation to actual foundation ditch between mould plate.Foundation ditch 400
Carried out laying and be mounted with different sensors 300 by the soil body 260, with to foundation ditch 400 under different condition from model casing 200
Produced various changes are tested, and obtain concrete physico-mechanical properties data intuitively.Foundation ditch 400 is to the 4th side plate 240
With the distance of the second river model groove 600, the soil body 260 of the side away from the second mould plate 420 of the first mould plate 410
Earth volume more than the earth volume of the soil body 260 in gap, owing to second partition 520 can move left and right, thus form foundation ditch 400
The soil pressure of the right and left is non-symmetrical load, simulates foundation ditch 400 and is close to the situation in river.Water tank 700 has been sticked scale
Chi is to understand and to regulate its water level conditions in time, and model casing 200 is external to the dead ahead of the 3rd side plate 230 and is mounted with to take pictures and sets
Standby 800, the picture of dynamic acquisition model deformation.Therefore, the simulation multiaspect deep foundation pit construction character of the embodiment of the present invention
Assay device 100 can be simulated formation deep basal pit and close on river waterpower and geological conditions, it was predicted that the excavation of foundation pit that multiaspect borders on the river is executed
Work deformation destroys with stability, and its simple in construction, function are easy, and test effect is directly perceived, accurately, have higher economy with
Repeatable.
Embodiments described above is a part of embodiment of the present invention rather than whole embodiments.The reality of the present invention
The detailed description executing example is not intended to limit the scope of claimed invention, but is merely representative of the selected enforcement of the present invention
Example.Based on the embodiment in the present invention, those of ordinary skill in the art are obtained under not making creative work premise
Every other embodiment, broadly falls into the scope of protection of the invention.
Claims (10)
1. the assay device simulating multiaspect deep foundation pit construction character, it is characterised in that include that model casing is with multiple
Sensor, is provided with the soil body in described model casing body, the described soil body is provided with polylith mould plate, is formed between described polylith mould plate
Foundation ditch, is provided with at least support member in described foundation ditch, the two ends of described support member are respectively held against two pieces of described mould plates, institute
The the first river model groove and the second river model groove being interconnected, described first river model groove it is provided with in stating model casing body
It is respectively arranged at the both sides of described foundation ditch with described second river model groove and connects with described foundation ditch, described foundation ditch and described the
Having gap between two river model grooves, the plurality of sensor is respectively arranged at the described soil body and described polylith mould plate.
Assay device the most according to claim 1, it is characterised in that be provided with the first dividing plate, institute in described model casing body
The inwall stating the first dividing plate and described model casing surrounds described first river model groove；Described polylith mould plate includes the first mould
Template and the second mould plate, one end of described first mould plate and one end of described second mould plate all with described first dividing plate
The side away from described first river model groove connect, the other end of described first mould plate and described second mould plate
Equal and described model casing the inwall of the other end is connected and forms institute between described first mould plate and described second mould plate
State foundation ditch；Be provided with second partition in described model casing body, the two ends of described second partition respectively with described first dividing plate and
The inwall of described model casing connects and forms described second river between the inwall of described first dividing plate and described model casing
Flow model groove, forms described gap between described second partition and described second mould plate.
Assay device the most according to claim 2, it is characterised in that described second partition and described first dividing plate and institute
The inwall stating model casing all removably connects.
Assay device the most according to claim 2, it is characterised in that described first river model groove is away from described second
One end of river model groove is provided with the 3rd dividing plate, the inwall of described 3rd dividing plate, described first dividing plate and described model casing it
Between form water tank, described water tank is communicated with water inlet pipe, and described water inlet pipe is provided with water flow control valve, described first dividing plate,
Described second partition and described 3rd dividing plate are provided with limbers.
Assay device the most according to claim 4, it is characterised in that described limbers is provided with defecator.
Assay device the most according to claim 5, it is characterised in that described defecator is gauze.
Assay device the most according to claim 1, it is characterised in that described first river model groove is provided with the first spilled water hole
And be equipped with the first stopple coordinated with the first spilled water hole, described second river model groove be provided with the second spilled water hole and be equipped with
The second stopple that second spilled water hole coordinates.
Assay device the most according to claim 1, it is characterised in that described first river model groove and described second river
The described soil body in model groove is respectively clay layer, fine sand layer, silt soil strata and mud from the bottom to top；In described foundation ditch
The described soil body is respectively clay layer, fine sand layer, silt soil strata from the bottom to top.
Assay device the most according to claim 2, it is characterised in that described first mould plate away from described second model
The earth volume of the described soil body of the side of plate is more than the earth volume of the described soil body in described gap.
10. according to the assay device described in any one of claim 1-9, it is characterised in that described assay device also include for
Record the photographing device of described model casing state.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436280A (en) * | 2017-09-26 | 2017-12-05 | 中国科学院武汉岩土力学研究所 | Curtain withdrawal device and curtain withdrawal system |
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| CN105839679A (en) * | 2016-04-25 | 2016-08-10 | 上海理工大学 | Model test device for simulating influence of excavation of double underground diaphragm wall foundation pits on converging deformation of tunnel |
| CN205999945U (en) * | 2016-08-31 | 2017-03-08 | 盐城工学院 | A kind of assay device of simulation multiaspect deep foundation pit construction character |
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| SU996645A1 (en) * | 1981-03-10 | 1983-02-15 | Проектно-Изыскательская Контора "Укрспецстройпроект" | Method of static testing of piles in sagging soils |
| CN103821183A (en) * | 2012-11-16 | 2014-05-28 | 同济大学 | Testing apparatus for simulating phenomenon and law of soil heave-piping failure |
| CN105839679A (en) * | 2016-04-25 | 2016-08-10 | 上海理工大学 | Model test device for simulating influence of excavation of double underground diaphragm wall foundation pits on converging deformation of tunnel |
| CN105735381A (en) * | 2016-04-30 | 2016-07-06 | 山东大学 | Centrifugal model test system with composite foundation and supporting structure having common characters |
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