CN205999946U - A kind of test device to Influence of Pile Foundation for the foundation pit construction that borders on the river - Google Patents

Abstract

This utility model is related to a kind of test device to Influence of Pile Foundation for the foundation pit construction that borders on the river, and belongs to deep basal pit and underground engineering construction to the impact evaluation of pile foundation and pile foundation optimization design field.This device includes model casing and multiple sensors, it is provided with the soil body and polylith mould plate in model casing body, form foundation ditch between polylith mould plate, it is provided with the pile foundation stretching into the soil body and at least one support member in foundation ditch, pile foundation is connected with measurement bracket away from one end of the soil body, the two ends of support member are respectively held against two block models plates, it is provided with the first river model groove and the second river model groove being interconnected and being located at foundation ditch both sides respectively, multiple sensors are arranged at the soil body, polylith mould plate, pile foundation and measurement bracket in model casing body.This device can visual simulation deep basal pit with close on river waterpower and geological conditions, the deep big foundation pit construction bottom heave resilience of bordering on the river of prediction multiaspect carries impact with pile foundation, and structure is simple, function is easy, have higher economy with repeatable.

Description

A kind of test device to Influence of Pile Foundation for the foundation pit construction that borders on the river

Technical field

This utility model is related to deep basal pit and underground engineering construction to the impact evaluation of pile foundation and pile foundation optimization design field, A kind of specifically related to test device to Influence of Pile Foundation for the foundation pit construction that borders on the river.

Background technology

In recent years, with the gradually development of urban construction and the industries such as water conservancy traffic, create substantial amounts of deep basal pit 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 big foundation pit engineering construction in place, and under the conditions of particularly multiaspect borders on the river, subsoil water directly participates in Bottom heave rebound effect, careless slightly will produce groundwater infiltration destruction, soil body slipping unstability, bottom heave resilience, engineering The problems such as stake displacement and unloading are broken, causes to cheat bottom pile foundation large area inclination or stake top rupture failure, the matter of impact engineering Amount, causes huge economic loss.

There is important interaction between deep big foundation pit protuberance resilience and hole bottom pile foundation bearing characters, however domestic at present Also lack outward intuitively practical analysis method, theoretical analysis and engineering calculation are still by base pit stability and Supporting Structure deformation And the impact of hole bottom pile foundation bearing characters separately assesses, individually calculate pit accident resilience and bearing capacity of pile foundation, analysis theories are not Meet the actual loading condition of foundation ditch and pile foundation, tool bears the character of much blindness.Additionally, engineering construction field test high cost, consumption Shi Jiuyuan and to test stress very remote with actual gap, or is limited to weak soil and groundwater condition, engineering site cannot be carried out base Hole resilience protuberance and its detection to hole bottom stake springback influence.

Utility model content

The purpose of this utility model is to provide a kind of test device to Influence of Pile Foundation for the foundation pit construction that borders on the river, and can simulate shape Become deep basal pit and close on river waterpower and geological conditions, the deep big foundation pit construction bottom heave resilience of bordering on the river of prediction multiaspect is held with pile foundation Carry and affect, its structure is simple, function is easy, test effect is directly perceived, accurate, there is higher economy and repeatability.

This utility model solves its technical problem and employs the following technical solutions to realize.

The utility model proposes a kind of test device to Influence of Pile Foundation for the foundation pit construction that borders on the river, it includes model casing, survey Amount support and multiple sensors, are provided with the soil body, the soil body is provided with polylith mould plate, are formed between polylith mould plate in model casing body Foundation ditch, is provided with the pile foundation stretching into the soil body in foundation ditch, one end away from the soil body of pile foundation is connected with measurement bracket, and measurement bracket is removable Unload the outer wall being connected to model casing, in foundation ditch, be additionally provided with least one support member, the two ends of support member are respectively held against two pieces Mould plate, is provided with the first river model groove being interconnected and the second river model groove, the first river model in model casing body Groove and the second river model groove are respectively arranged at the both sides of foundation ditch and are connected with foundation ditch, have between foundation ditch and the second river model groove There is gap, multiple sensors are distributed in the soil body, polylith mould plate, pile foundation and measurement bracket.

Further, in this utility model preferred embodiment, in model casing body, be provided with the first dividing plate, the first dividing plate with The inwall of model casing surrounds the first river model groove；Polylith mould plate includes the first mould plate and the second mould plate, the first mould One end of one end of template and the second mould plate is all connected away from the side of the first river model groove with the first dividing plate, and first The other end of the other end of mould plate and the second mould plate is all connected with the inwall of model casing and in the first mould plate and Form foundation ditch between two mould plates；Be provided with second partition in model casing body, the two ends of second partition respectively with the first dividing plate with And the inwall of model casing connects and forms the second river model groove between the inwall of the first dividing plate and model casing, second every Form gap between plate and the second mould plate.

Further, in this utility model preferred embodiment, multiple sensors include being arranged at pile foundation and measurement bracket The pile foundation sensor for measuring pile foundations parameter, and the foundation ditch for measuring foundation ditch parameter being arranged at mould plate and the soil body Sensor.

Further, in this utility model preferred embodiment, measurement bracket is included horizontal stand and is lived with horizontal stand The multiple vertical racks being dynamically connected, vertical rack includes the first pipe fitting and the second pipe fitting, the first pipe fitting and the level being flexibly connected Support is flexibly connected, and pile foundation sensor is arranged at the second pipe fitting and pile foundation.

Further, in this utility model preferred embodiment, horizontal stand is provided with groove towards the side of vertical rack, First pipe fitting slides and is embedded in groove, and the first pipe fitting is threadeded with the second pipe fitting.

Further, in this utility model preferred embodiment, second partition and the first dividing plate and model casing interior Wall is all detachably connected.

Further, in this utility model preferred embodiment, the first river model groove is away from the second river model groove One 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 connect There is water inlet pipe, water inlet pipe is provided with water flow control valve, the first dividing plate, second partition and the 3rd dividing plate are provided with limbers.

Further, in this utility model preferred embodiment, limbers is provided with defecator.

Further, in this utility model preferred embodiment, defecator is gauze.

Further, in this utility model preferred embodiment, the side away from the second mould plate of the first mould plate The earth volume of the soil body is more than the earth volume of the soil body in gap.

Further, in this utility model preferred embodiment, the first river model groove is provided with the first spilled water hole and arranges There is the first stopple with the first spilled water hole cooperation, the second river model groove is provided with the second spilled water hole and is equipped with and the second spilled water hole Second stopple of cooperation.

Further, in this utility model preferred embodiment, test device is also included for record cast casing state Photographing device.

The beneficial effect of the test device to Influence of Pile Foundation for the foundation pit construction that borders on the river of this utility model embodiment is：

This foundation pit construction test device to Influence of Pile Foundation that borders on the river, is respectively equipped with first being interconnected in model casing body River model groove and the second river model groove, in process of the test, by adjusting the first river model groove, in the second river model groove Flowing water reach the water level of test requirements document to simulate true river.This test device simulates actual pattern foundation pit supporting structure with mould plate Wall, the actual foundation ditch of support member simulation supports, and is provided with pile foundation in foundation ditch, and foundation ditch from the laying soil body in model casing body and is mounted with different The sensor of effect, to be tested with various change produced by pile foundation to foundation ditch under different condition, is obtained specifically intuitively Physico-mechanical properties data.This test device can be simulated formation deep basal pit and close on river waterpower and geological conditions, predict multiaspect The deep big foundation pit that borders on the river construction bottom heave resilience and pile foundation carry impact, and its structure is simple, function is easy, test effect is directly perceived, Accurately, there is higher economy and repeatability.

Brief description

In order to be illustrated more clearly that the technical scheme of this utility model embodiment, below will be to use required in embodiment Accompanying drawing be briefly described it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should be by Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used To obtain other related accompanying drawings according to these accompanying drawings.

The top view of the test device to Influence of Pile Foundation for the foundation pit construction that borders on the river that Fig. 1 provides for this utility model embodiment；

Fig. 2 be in Fig. 1 border on the river foundation pit construction to the test device of Influence of Pile Foundation along line A-A profile；

The front view of the test device to Influence of Pile Foundation for the foundation pit construction that borders on the river that Fig. 3 provides for this utility model embodiment；

First sluicing of the test device to Influence of Pile Foundation for the foundation pit construction that borders on the river that Fig. 4 provides for this utility model embodiment The structural representation in hole；

Second sluicing of the test device to Influence of Pile Foundation for the foundation pit construction that borders on the river that Fig. 5 provides for this utility model embodiment The structural representation in hole；

First rubber in the test device to Influence of Pile Foundation for the foundation pit construction that borders on the river that Fig. 6 provides for this utility model embodiment Stopple and the structural representation of the second rubber stopple；

Water tank in the test device to Influence of Pile Foundation for the foundation pit construction that borders on the river that Fig. 7 provides for this utility model embodiment Front view；

The knot of the test device further groove to Influence of Pile Foundation for the foundation pit construction that borders on the river that Fig. 8 provides for this utility model embodiment Structure schematic diagram；

Limbers in the test device to Influence of Pile Foundation for the foundation pit construction that borders on the river that Fig. 9 provides for this utility model embodiment Structural representation.

Icon：100- borders on the river the test device to Influence of Pile Foundation for the foundation pit construction；200- model casing；300- sensor； 400- foundation ditch；500- the first river model groove；600- the second river model groove；700- water tank；800- photographing device；210- Side plate；220- second side plate；230- the 3rd side plate；232- bolt hole；235- bolt；240- the 4th side plate；250- base plate； 211- first spilled water hole；213- the first rubber stopple；221- second spilled water hole；223- the second rubber stopple；The 260- soil body；310- Earth pressure gauge；320- pore pressure gauge；330- first foil gauge；340- displacement meter；350- dial gauge；360- measures one's own ability ring； 370- second foil gauge；510- first dividing plate；520- second partition；530- the 3rd dividing plate；540- limbers；410- first model Plate；420- second mould plate；430- support member；440- pile foundation；450- measurement bracket；451- horizontal stand；453- vertical rack； 455- first pipe fitting；457- second pipe fitting；459- groove；710- water inlet pipe；720- water flow control valve.

Specific embodiment

Purpose, technical scheme and advantage for making this utility model embodiment are clearer, new below in conjunction with this practicality Accompanying drawing in type embodiment, is clearly and completely described to the technical scheme in this utility model embodiment.Obviously, retouched The embodiment stated is a part of embodiment of this utility model, rather than whole embodiments.Generally described in accompanying drawing herein and The assembly of this utility model embodiment illustrating can be arranged with various different configurations and design.

Therefore, below requirement is not intended to limit to the detailed description of the embodiment of the present utility model providing in the accompanying drawings The scope of the present utility model of protection, but it is merely representative of selected embodiment of the present utility model.Based in this utility model Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of not making creative work, all Belong to the scope of this utility model protection.

In description of the present utility model, it should be noted that term " on ", D score, "left", "right", " vertical ", The orientation of instruction such as " interior ", " outward " or position relationship are based on orientation shown in the drawings or position relationship, or this practicality is new Orientation or position relationship that type product is usually put when using, are for only for ease of description this utility model and simplify description, and It is not instruction or the hint device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore It is not intended that to restriction of the present utility model.Additionally, term " first ", " second ", " the 3rd ", " the 4th " are only used for differentiation and retouch State, and it is not intended that indicating or hint relative importance.

Additionally, the term such as term " level ", " vertical " is not offered as requiring part abswolute level or vertical, but can be slightly Low dip.As " level " only refers to for its direction relatively " vertical " more level, it is not that this structure of expression must be complete Full level, but can be slightly tilted.

In addition it is also necessary to explanation in description of the present utility model, unless otherwise clearly defined and limited, term " sets Put ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can To be to be mechanically connected or electrical connection；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, Ke Yishi The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in utility model.

With reference to embodiments a kind of foundation pit construction that borders on the river of the present utility model is entered to the test device 100 of Influence of Pile Foundation Row illustrates.

Please with reference to Fig. 1, Fig. 2 and Fig. 3, the present embodiment provides a kind of foundation pit construction that borders on the river that the test of Influence of Pile Foundation is filled Put 100, it includes model casing 200, sensor 300 and the photographing device 800 outside model casing 200.

Model casing 200 is to close the first side plate 210 being connected, the second side plate 220, the 3rd side plate the 230, the 4th by head and the tail Side plate 240 forms four walls, then the cavity structure surrounding open top with base plate 250.Connection between each side plate and base plate 250 Mode is preferably welds.

Wherein, preferably, the upper end of the first side plate 210 and the 3rd side plate 230 is aluminium alloy plate, lower end is double-deck tempering glass Glass plate.Wherein aluminium alloy plate is preferably dimensioned to be thick 50mm, high 400mm, and armorplate glass is preferably dimensioned to be thick 10mm, height 2800mm, thus meet maximum resistance to compression demand with minimum cost.Pass through colourless glass between aluminium alloy plate and armorplate glass The gluing knot of glass.

Second side plate 220, the 4th side plate 240 are also all preferably made up of aluminium alloy with base plate 250, additionally, also can be by other Hard material, such as fiberglass etc..Second side plate 220, the 4th side plate 240 and the thickness of base plate 250 are 50mm, but also dependent on The concrete size of this test device 100 to Influence of Pile Foundation for the foundation pit construction that borders on the river and demand are adjusted, for example, can be 30mm- 60mm.Base plate 250 lower end is welded with the steel plate that thickness is 90mm and is reinforced.

Fill out in model casing 200 and be covered with the soil body 260.Preferably, the base plate 250 of model casing 200 bottom is equipped with Thickness is the coarse sand of 100mm, and the particle diameter of coarse sand can be for example 1mm.Space more than coarse sand is filled out by the engineering ground soil body 260 Fill.

The soil body 260 contains 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 being comprised with the soil body 260 in region.

In the present embodiment, in model casing 200, it is provided with foundation ditch 400, the first river model groove 500, the 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 setting in model casing 200 first every Plate 510 is surrounded with the inwall of model casing 200, and that is, the first river model groove 500 is respectively with the first side plate 210, the second side plate 220th, the 4th side plate 240 and the first dividing plate 510 are four sides.Preferably, in the present embodiment the first river model groove 500 width Degree substantially 500mm.

Please with reference to Fig. 4 and Fig. 6, 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 with the first spilled water hole 211 cooperation.But in addition to rubber stopple, other can also be selected arbitrarily permissible The part of closing 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 specific 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 levels.Refer to Fig. 3, relatively Good, the first spilled water hole 211 is located at the first side plate 210 simultaneously near the region of base plate 250 and the second side plate 220.First sluicing The diameter in hole 211 is preferably 60mm, and the center of circle of the first spilled water hole 211 is to the public rib of the first side plate 210 and the second side plate 220 Distance can be for example 250mm, and the distance of the center of circle to the first side plate 210 and the public rib of base plate 250 can be 300mm.First The design attitude of spilled water hole 211 is because of closer base plate 250, therefore can meet when in the first river model groove 500, water level is relatively low Can be sluiced.

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 The inwall of dividing plate 530, the first dividing plate 510 and model casing 200 is formation water tank 700 between the 4th side plate 240.

Refer to Fig. 7, the side wall of water tank 700 and the ft connection of model casing 200 have water inlet pipe 710, also set simultaneously 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 flowing into water tank to water inlet pipe 710 in time 700 discharge is controlled and adjusts.Different water are added from water flow control valve 720 in water tank 700 by water inlet pipe 710 The water of position, thus coordinate the first spilled water hole 211 to make to form the river waterpower geology of different high water level in the first river model groove 500 Condition and foundation ditch place of bordering on the river.As preferred, water flow control valve 720 is check valve, and water inlet pipe 710 is connected in water storage device (not shown), is flow in water tank 700 by immersible pump extraction hydrops and through check valve, to reach unidirectional water inflow and to prevent hydrops Aqueous reflux in case 700 enters the purpose of water storage device.Additionally, at least one side is transparent area in water tank 700, this transparent area Being sticked has rule, preferably steel ruler, thus experimenter being made to test in time and reading the water level in water tank 700.

The soil body 260 in this utility model embodiment is provided with polylith mould plate, and foundation ditch 400 is by being arranged in the soil body 260 Polylith mould plate is formed.Specifically, the mould plate surrounding foundation ditch 400 includes the first mould plate 410 and the second mould plate 420, its In one end of the first mould plate 410 and the second mould plate 420 one end and the first river model groove 500 the first dividing plate 510 Connect, one end away from the first river model groove 500 of the first mould plate 410 and the second mould plate 420 away from the first river One end of flow model groove 500 is all connected with the 3rd side plate 230 of model casing 200, and in the first mould plate 410 and the second model Form foundation ditch 400, this two block models plate is respectively as left and right two side of foundation ditch 400 between plate 420.The size of foundation ditch 400 Substantially 4500mm × 2000mm × 2900mm (length × width × height), in order to test operation.First mould plate 410 and the second mould Template 420 is preferably aluminium alloy plate, and its thickness converts according to actual pattern foundation pit supporting structure wall and obtains.

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 form support to the first mould plate 410 and the second mould plate 420. The quantity of support member 430 is not 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 is pressed actual foundation ditch and supports conversion to obtain.

Be additionally provided with pile foundation 440 in foundation ditch 400, one end of pile foundation 440 is stretched in the soil body 260, away from the soil body 260 one end with Measurement bracket 450 connects.Pile foundation 440 is Columns, and its quantity is not unique, the quantity to simulate true pile foundation, and it can lead to Cross stratum or water and the load of its superstructure is delivered to soil layer that deep is harder, that compressibility is little or rock stratum.Preferably, stake Base 440 is for being for example the aluminium alloy lining plastic PPR multiple tube of current most common on the market a diameter of 50mm or 63mm.Test In, for testing resilience strain and the moment of flexure of pile foundation 440, PPR multiple tube edge is cut into semicanal perpendicular to the direction of base plate 250, Spliced integral after the corresponding location settings sensor in tube wall both sides 300 again and the two ends of this multiple tube are sealed Mouthful, wherein, connecting method can be for example welding or glass cement bonding.

Refer to Fig. 2, measurement bracket 450 is removably attachable to the outside of model casing 200, it includes and model casing Many parallel horizontal stands 451 of 200 base plate 250 and vertical with horizontal stand 451 and be flexibly connected many vertically Frame 453.This measurement bracket 450 is set with more easily pile foundation 440 resilience to diverse location in foundation ditch 400 and situation about above pulling out Measure.

Two vertical racks 453 and the first side plate 210 and the 3rd side near the first side plate 210 and the 3rd side plate 230 Plate 230 is flexibly connected.Specifically, please with reference to Fig. 2 and Fig. 4, the aluminium alloy plate of the first side plate 210 and the 3rd side plate 230 One end away from the soil body 260 all offers bolt hole 232, and as preferred, this two vertical racks 453 pass through through bolt The bolt 235 in hole 232 is connected with the 3rd side plate 230 with the first side plate 210 respectively.

Refer to Fig. 2, vertical rack 453 is made up of the first pipe fitting 455 being flexibly connected and the second pipe fitting 457, first pipe Part 455 and the second pipe fitting 457 are preferably steel pipe.Wherein, the first pipe fitting 455 is located at top and is flexibly connected with horizontal stand 451. Specifically, refer to Fig. 8, horizontal stand 451 is provided with groove 459 towards the side of vertical rack 453, and the first pipe fitting 455 is embedded In groove 459, so that vertical rack 453 can be mobile along groove 459 in the position of horizontal stand 451, to test foundation ditch Pile foundation 440 resilience of diverse location and situation about above pulling out in 400.

As preferred, the second pipe fitting 457 is half sealing steel pipe, that is to say that the second pipe fitting 457 is connected with the first pipe fitting 455 One end be opening, and away from the first pipe fitting 455 one end be closing.Second pipe fitting 457 and the first pipe fitting 455 screw thread are even Connect, thus playing the effect controlling vertical rack 453 flexible on the direction perpendicular to base plate 250, so that vertical rack 453 He What the contact distance of pile foundation 440 met sensor 300 lays requirement.Specifically, have between the second pipe fitting 457 and pile foundation 440 Certain space, this space is in order to lay sensor 300.

In foundation ditch 400 and its outside model casing 200, all soil bodys 260 are respectively clay layer, thin from the bottom to top Layer of sand, silt soil strata.

It is additionally provided with the second river model groove 600 connecting with the first river model groove 500 in model casing 200.And the One river model groove 500 and the second river model groove 600 are respectively arranged at the both sides of foundation ditch 400 and are connected with foundation ditch 400.

Specifically, the second river model groove 600 is arranged along the second side plate 220, that is, be located at foundation ditch 400 near the second side plate 220 side.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 the first dividing plate 510 and model casing 200 in 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 respectively with the second side plate 220, the 3rd side plate 230, the first dividing plate 510 and second partition 520 for four sides. Wherein, the inwall of second partition 520 and the first dividing plate 510 and model casing 200, namely the 3rd side plate 230 all detachably connects Connect.Preferably, in the present embodiment, the width of the second river model groove 600 is identical with the first river model groove 500, also for 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 for example 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. 5 and Fig. 6, 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 with the second spilled water hole 221 cooperation.But in addition to rubber stopple, other can also be selected arbitrarily permissible The part of closing spilled water hole.In practical operation, after the second spilled water hole 221 is blocked by the second rubber stopple 223, first can be passed through River model groove 500, to water filling in the second river model groove 600, according to specific water level demand, also can take out the second rubber hole Plug 223 releases part water body, thus cooperatively forming different river model groove water levels from the first river model groove 500.Preferably, Refer to Fig. 4, the diameter of the second spilled water hole 221 is preferably 60mm, it is simultaneously close that the second spilled water hole 221 is located 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 public affairs of the first side plate 210 and the second side plate 220 The distance of rib can be for example 250mm altogether, and the distance of the center of circle to the second side plate 220 and the public rib of base plate 250 can be 300mm.The design attitude of the second spilled water hole 221 is similar with the first spilled water hole 211, because of closer base plate 250, therefore when the second river Also can be sluiced when in model groove 600, water level is relatively low.

Between second river model groove 600 and foundation ditch 400, there is gap, specifically, this gap is in 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 preferred, the former distance is 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 foundation ditch 400 right side 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 being formed on foundation ditch 400 Soil pressure is non-symmetrical load, simulates the situation that foundation ditch 400 is close to river.

Refer to Fig. 9, in order that shape between water tank 700, the first river model groove 500 and the second river model groove 600 Become the water route that interconnects, so that current is infiltrated in the soil body 260 in model casing 200 simultaneously, respectively the first dividing plate 510, Multiple limbers 540 are offered on second partition 520 and the 3rd dividing plate 530.Preferably, limbers 540 opens up for two-way interval, That is to say in orthogonal both direction, for example, vertically open up with horizontal direction interval, spacing distance is preferably 100mm, Limbers 540 diameter for example may be selected to be 5mm.Additionally, in order to prevent foundation ditch 400, the 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, therefore respectively in the first dividing plate 510, second The limbers 540 surface setting defecator of dividing plate 520 and the 3rd dividing plate 530, for example, can be gauze.

First dividing plate 510, second partition 520 and the 3rd dividing plate 530 are steel plate, the wherein first dividing plate 510 and the second side Between connected mode between plate 220 and the 4th side plate 240, 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 and the first side plate 210 and the first dividing plate 510 is both preferably welds.

First river model groove 500 and the soil body 260 in described second river model groove 600 are respectively glutinous from the bottom to top Soil layer, fine sand layer, silt soil strata and mud.

In order to obtain under different water levels border on the river excavation operating mode on foundation ditch 400 and pile foundation 440 impact straight See data, in upper surface and the side wall difference of the model plate surface, the inside of the soil body 260 and upper surface and pile foundation 440 of foundation ditch 400 It is provided with the sensor 300 of not same-action.Sensor 300 for example can include displacement, deformation and the institute for detecting foundation ditch 400 Be stressed isoparametric foundation ditch sensor, can also include for example for the resilience strain suffered by detection of pier foundation 440, uplift force With side friction isoparametric pile foundation sensor.

Specifically, refer to Fig. 2, the present embodiment pile foundation sensor includes such as dial gauge 350, measure one's own ability ring 360 and Two foil gauges 370.Wherein, to be installed on pile foundation 440 along the direction being parallel and perpendicular to the soil body 260 surface respectively remote for dial gauge 350 From one end of the soil body 260, for measuring pile foundation 440 away from the vertical resilience displacement of one end of the soil body 260 and horizontal tilt displacement； Ring 360 of measuring one's own ability is installed on pile foundation 440 one end away from the soil body 260 along the direction perpendicular to the soil body 260 surface, for measuring foundation ditch 400 constructions are to the resilience of pile foundation 440 and uplift force；Second foil gauge 370 interval is installed on the tube wall of pile foundation 440, that is to say point The correspondence position of the inside and outside tube wall of PPR multiple tube Jian Ge be installed on, for measuring the pile foundation 440 under foundation ditch 400 excavation condition Resilience strain, and then the side friction suffered by pile foundation 440 and Bending moment distribution situation can be calculated.

Refer to Fig. 3, foundation ditch sensor includes such as earth pressure gauge 310, pore pressure gauge 320, the first foil gauge 330 And displacement meter 340.Wherein, earth pressure gauge 310 be embedded in the first mould plate 410 and the second mould plate 420 away from foundation ditch 400 Inside the soil body 260 of both sides, and the bottom surface of earth pressure gauge 310 is contacted with the first mould plate 410 or the second mould plate 420, uses Suffered active earth pressure and passive earth pressure on two mould plates of test foundation ditch 400, and can be to this two mould plate Suffered soil pressure is contrasted, the foundation ditch or close on the soil pressure on underground structure foundation pit enclosure wall thus analysis and summary borders on the river Distribution problem；Pore pressure gauge 320 is embedded in foundation ditch 400, the first river model groove 500 and the second river model groove 600 In the soil body 260, it is distributed with the pore water pressure under the conditions of the SEA LEVEL VARIATION that borders on the river for testing foundation ditch 400 excavation construction；First should Become piece 330 respectively along being uniformly attached at the corresponding surface of the first mould plate 410 both sides perpendicular to the direction of base plate 250 and second At the corresponding surface of mould plate 420 both sides, for calculating displacement and the moment of flexure situation of change of two block models plates；Displacement meter 340 buries The soil body 260 surface of the model casing 200 outside foundation ditch 400, for detecting deformation of wall and hole in foundation ditch 400 work progress The sedimentation situation of the outer soil body 260, the environmental effect to Adjacent Buildings, road etc. for the predictive engine construction.

Preferably, filling the impact to dial gauge 350 and ring 360 of measuring one's own ability with digging process to reduce the soil body 260, permissible In the sheathed barrier box in outside of dial gauge 350 and ring 360 of measuring one's own ability, to prevent dial gauge 350 and ring 360 of measuring one's own ability straight with the soil body 260 Contact.

For ease of dynamic acquisition and record cast casing 200 state, intuitively and accurately obtain this foundation ditch 400 excavation construction Deformation and its springback influence situation to hole bottom pile foundation 440, this utility model embodiment is additionally provided with outside model casing 200 Photographing device 800, with the mould plate displacement of dynamic acquisition foundation ditch 400, bottom heave resilience, the resilience of pile foundation 440 and inclination, base Situations such as sliding rupture cheating 400 and stability closing on river.Preferably, photographing device 800 selects high-definition shooting camera, and At the dead ahead 1.5m of the 3rd side plate 230, also it is 1.5m apart from the vertical dimension of base plate 250.

The above-mentioned test device 100 to Influence of Pile Foundation for the foundation pit construction that borders on the river, its test process is as follows：

Make foundation ditch 400 and lay in model casing 200, the first river model groove 500 and the second river model groove 600 The soil body 260.When the soil body 260 is filled to the absolute altitude of the mould plate of foundation ditch 400, the first mould plate 410 and the second mould plate 420 are installed And it is respectively arranged earth pressure gauge 310, pore pressure gauge 320, the first foil gauge 330 and displacement meter 340.Install pile foundation 440 with Measurement bracket 450 is simultaneously respectively arranged dial gauge 350, measure one's own ability ring 360 and the second foil gauge 370, and all the sensors 300 are external in Corresponding test port.Add different water levels in water tank 700, make water tank 700 and the first river model groove 500 and second River model groove 600 forms water-flowing path；Layering consolidates every layer soil body 260 and measures the respective physical mechanical property of the soil body 260 Index.After the completion of the soil body 260 consolidation, carry out the excavation construction simulation of foundation ditch 400, its operation is：Excavate the first layer soil body 260th, add first support member 430, excavate the second layer soil body 260, add second support member 430, successively down until digging To hole bottom.By river difference fluctuation in stage and last characteristic, measure displacement during excavation construction for the foundation ditch 400, soil pressure, Pore pressure change and the soil body 260 settle, cheat interior protuberance, pile foundation 440 resilience, pile foundation 440 tilt with strain and river side slope steady Situations such as qualitative destruction.High-definition camera is kept to be in continuous duty, dynamic acquisition model deformation picture in process of the test.

A kind of above-mentioned test device 100 to Influence of Pile Foundation for the foundation pit construction that borders on the river, can more conveniently form the deep base that borders on the river Hole geology and hydraulics, visual simulation is bordered on the river the deformation of deep big foundation pit excavation construction and stability disruption character and foundation pit construction pair The impact pulled out in pile foundation resilience, it is possible to setting different soil, surrounding buildingses substance environment and water level jacking conditions repeatedly, carries out phase Design, arrangement and method for construction assessment and the forecast analysis of stability failure condition closed, test effect directly perceived, accurately.

In sum, the above-mentioned test device 100 to Influence of Pile Foundation for the foundation pit construction that borders on the river, it is in model casing 200 Respectively with three pieces of dividing plates every having set out the first river model groove 500, the second river model groove 600 and water tank 700, water tank 700 are provided with water inlet pipe 710 and water flow control valve 720, can control the hydrops in water tank 700 at any time.For making water tank 700 In water energy flow in river model groove and model casing 200, three pieces of baffle surface all offer limbers 540；For coordinating river Water body in flow model groove can form different water levels, and two river model grooves are equipped with spilled water hole and stopple.In process of the test, if Need high water level, then can use stopple to block spilled water hole, so that the water in water tank 700 is flowed in river model groove, reach equivalent water level Close water flow control valve 720 afterwards；If needing low water level, stopple can be opened, so that the water in river model groove is flowed out by spilled water hole, As little as required water level when stopple is blocked spilled water hole.Foundation ditch 400 replaces actual pattern foundation pit supporting structure wall, mould by two mould plates It is provided with the support member 430 replacing actual foundation ditch to support, thus realizing the simulation to actual foundation ditch between template.Set in foundation ditch 400 There is many piles base 440, pile foundation 440 is connected with the measurement bracket 450 that can vertically stretch, by soil in foundation ditch 400 and model casing 200 Body 260 is laid and is mounted with different sensors 300 in foundation ditch 400, pile foundation 440 and the soil body 260, with different condition Foundation ditch 400 and various change produced by pile foundation 440 are tested, and obtain concrete intuitively physico-mechanical properties data.Foundation ditch 400 to the 4th side plates 240 and the distance of the second river model groove 600, the first mould plate 410 away from the second mould plate The earth volume of the soil body 260 of 420 side is more than the earth volume of the soil body 260 in gap, because second partition 520 can move left and right Dynamic, thus the soil pressure forming foundation ditch 400 the right and left is non-symmetrical load, simulate the situation that foundation ditch 400 is close to river.Long-pending Water tank 700 rule that is sticked is external to the 3rd side plate 230 to understand and to adjust its water level conditions, model casing 200 in time Dead ahead is mounted with photographing device 800, the picture of dynamic acquisition model deformation.Therefore, one kind of this utility model embodiment is faced River foundation pit construction can be simulated formation deep basal pit and be closed on river waterpower and geological conditions to the test device 100 of Influence of Pile Foundation, in advance Survey border on the river deep big foundation pit construction bottom heave resilience and pile foundation of multiaspect and carry impact, and its structure is simple, function is easy, test effect Fruit is directly perceived, accurate, has higher economy and repeatability.

Embodiments described above is a part of embodiment of this utility model, rather than whole embodiments.This practicality The detailed description of new embodiment is not intended to limit claimed scope of the present utility model, but is merely representative of this reality With new selected embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not making creation Property work under the premise of the every other embodiment that obtained, broadly fall into the scope of this utility model protection.

Claims (10)

1. a kind of foundation pit construction that borders on the river to the test device of Influence of Pile Foundation it is characterised in that include model casing, measurement bracket with Multiple sensors, are provided with the soil body in described model casing body, and the described soil body is provided with polylith mould plate, between described polylith mould plate Form foundation ditch, be provided with the pile foundation stretching into the described soil body in described foundation ditch, one end away from the described soil body of described pile foundation is connected with Measurement bracket, described measurement bracket is removably connected to the outer wall of described model casing, is additionally provided with least one in described foundation ditch Root support member, the two ends of described support member are respectively held against two pieces of described mould plates, be provided with and be interconnected in described model casing body The first river model groove and the second river model groove, described first river model groove and described second river model groove set respectively It is placed in the both sides of described foundation ditch and connects with described foundation ditch, between described foundation ditch and described second river model groove, there is gap, The plurality of sensor is distributed in the described soil body, described polylith mould plate, described pile foundation and described measurement bracket.

2. test device according to claim 1 is 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 with 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 one end of described first mould plate and described second mould plate all with described first dividing plate 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.

3. test device according to claim 2 is it is characterised in that the plurality of sensor includes being arranged at described pile foundation And the pile foundation sensor of the parameter for measuring described pile foundation of described measurement bracket, and it is arranged at described mould plate and described The foundation ditch sensor of the parameter for measuring described foundation ditch of the soil body.

4. test device according to claim 3 it is characterised in that described measurement bracket include horizontal stand and with described Multiple vertical racks that horizontal stand is flexibly connected, described vertical rack includes the first pipe fitting and the second pipe fitting being flexibly connected, Described first pipe fitting is flexibly connected with described horizontal stand, and described pile foundation sensor is arranged at described second pipe fitting and described stake Base.

5. test device according to claim 4 is it is characterised in that described horizontal stand is towards the one of described vertical rack Side is provided with groove, and described first pipe fitting slides and is embedded in described groove, and described first pipe fitting is with described second pipe fitting screw thread even Connect.

6. test device according to claim 2 is it is characterised in that described second partition and described first dividing plate and institute The inwall stating model casing is all detachably connected.

7. test device according to claim 2 is 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.

8. test device 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.

9. test device according to claim 1 is it is characterised in that described first river model groove is provided with the first spilled water hole And be equipped with first spilled water hole cooperation the first stopple, described second river model groove be provided with the second spilled water hole and be equipped with Second stopple of the second spilled water hole cooperation.

10. the test device according to any one of claim 1-9 it is characterised in that described test device also include for Record the photographing device of described model casing state.