CN107677498A - The simulation test device and method of the stake soil support combination supporting system mechanism of action - Google Patents
The simulation test device and method of the stake soil support combination supporting system mechanism of action Download PDFInfo
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- CN107677498A CN107677498A CN201711063467.0A CN201711063467A CN107677498A CN 107677498 A CN107677498 A CN 107677498A CN 201711063467 A CN201711063467 A CN 201711063467A CN 107677498 A CN107677498 A CN 107677498A
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
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Abstract
The simulation test device and method that provide a kind of soil support combination supporting system mechanism of action of the present invention, device include testing native case, preceding campshed model, rear campshed model, coupling beam model, diagonal brace model, slurries feed system, system for monitoring displacement and data handling system.The present invention can simulate the native change in displacement rule for supportting combination supporting system in Excavation Process of stake in the case of different forward and backward campshed building-in depths, spacing and diagonal brace difference grouting amount, obtain the mechanism of action of stake soil support combination supporting system, so as to obtain optimal forward and backward campshed building-in depth, spacing and grouting amount, reach reasonable selection stake soil support design and the purpose of construction parameter.
Description
Technical field
The present invention relates to building model engineering technical field, more particularly to a kind of Pile Soil-support combination supporting system effect machine
The simulation test device and method of reason.
Background technology
With the continuous quickening of urbanization process, it is becoming tight town site day, with existing buildings or structures apart from non-
Often near architectural engineering is more and more, because excavation of foundation pit has very big influence to the safety of buildings or structures around, because
This, it is desirable to not only there is safe support system during excavation, and also speed of application is fast, to reduce foundation ditch as far as possible
Surrounding soil caused by excavation construction deforms, and ensures the safety of periphery buildings or structures.
At present, Pit Bracing in Soft Soil supports before typically putting down support and stake+steel pipe using gravity type enclosure wall, stake+underground water
Structure type.Gravity type enclosure wall without inner support, can quickly be cut the earth typically in hole, but Bit andits control ability compared with
Difference, the structure type Bit andits control ability supportted before the flat support of stake+underground water and stake+steel pipe is stronger, but due to having branch in hole
Support, have impact on construction speed.In view of above-mentioned phenomenon, can not only reach Bit andits control requirement but also can cancel the stake of hole inner support-
Soil-support combination supporting system has gradually obtained popularization and application.
The action effect of Pile Soil-support combination supporting system, building-in depth with forward and backward campshed, the spacing of the two and tiltedly
The grouting amount of support has very big relation.However, so far, the mechanism of action of Pile Soil-support combination supporting system does not have so far
It is substantially to solution, during design by engineering experience.
The content of the invention
Exist in the prior art or potential weak point in view of above-mentioned, the invention provides a kind of Pile Soil-support combination branch
The simulation test device of the watch box system mechanism of action, and a kind of simulated test side of Pile Soil-support combination supporting system mechanism of action
Method, with the experimental rig and method, the different notes of forward and backward campshed difference building-in depth, different spacing and diagonal brace can be obtained
Pile Soil-change in displacement rule of the support combination supporting system in Excavation Process in the case of slurry amount, obtains Pile Soil-support group
The mechanism of action of support system is closed, so as to obtain the building-in depth of optimal forward and backward campshed, spacing and the grouting amount of diagonal brace, is reached
To reasonable selection Pile Soil-support design and the purpose of construction parameter.
To achieve the above object, the first aspect of the present invention provides a kind of Pile Soil-support combination supporting system mechanism of action
Simulation test device, it includes：
Native case is tested, the experiment soil body is equipped with the native case of experiment；
Preceding campshed model, it is inserted in the experiment soil body of simulation margin of foundation pit；
Campshed model afterwards, it is inserted in the experiment soil body, the rear campshed model passes through company with the preceding campshed model
Beam model is connected, and slip casting hole is offered on the rear campshed model；
The diagonal brace model of inner hollow, the first end opening of the diagonal brace model is simultaneously connected to the slip casting hole, described
In the second end insertion experiment soil body of diagonal brace model and run through the preceding campshed model, the second end of the diagonal brace model is set
There is slurry outlet；
Slurries feed system, the slip casting hole is connected to by Grouting Pipe；
System for monitoring displacement, including the laser displacement sensor and laser target being oppositely arranged, the laser displacement sensing
Device is fixed on the side wall of the native case of the experiment, the laser target be fixed on the preceding campshed model or it is described after campshed model
Top；And
Data handling system, including be connected to the data collecting instrument of the laser displacement sensor and be connected to the data
The data processor of Acquisition Instrument.
Experimental rig of the present invention and method, different forward and backward campshed building-in depth, spacing and diagonal braces can be simulated not
With the Pile Soil in the case of grouting amount-change in displacement rule of the support combination supporting system in Excavation Process, obtain Pile Soil-
The mechanism of action of combination supporting system is supportted, so as to obtain optimal forward and backward campshed building-in depth, spacing and grouting amount, reaches conjunction
The purpose of reason selection Pile Soil-support design and construction parameter.
The model test apparatus of the Pile Soil-support combination supporting system mechanism of action, which further improves, to be, before described
Diagonal brace perforation is offered on campshed model, the second end of the diagonal brace model is arranged in the diagonal brace perforation.
The model test apparatus of the Pile Soil-support combination supporting system mechanism of action, which further improves, to be, the slurry
Liquid supply system includes air pressure supply arrangement and slurries container, and the air pressure supply arrangement is contained by tracheae and the slurries
Put container to be connected, the slurries container is connected to the slip casting hole of the rear campshed model by the Grouting Pipe.
The model test apparatus of the Pile Soil-support combination supporting system mechanism of action, which further improves, to be, the gas
Pipe is connected to the top of the slurries container, and the Grouting Pipe is connected to the bottom of the slurries container.
The model test apparatus of the Pile Soil-support combination supporting system mechanism of action, which further improves, to be, the gas
Pipe is provided with pneumatic control valve, and the Grouting Pipe is provided with slurries control valve.
The model test apparatus of the Pile Soil-support combination supporting system mechanism of action, which further improves, to be, the slurry
The top of liquid container is provided with air bleeding valve.
The model test apparatus of the Pile Soil-support combination supporting system mechanism of action, which further improves, to be, the examination
The side wall for testing native case is at least the preceding campshed model or institute apart from the distance of the preceding campshed model or the rear campshed model
State greater depth in rear campshed model twice.
The second aspect of the present invention provides a kind of simulation experiment method of Pile Soil-support combination supporting system mechanism of action,
It includes step：
The preceding campshed model of offer, rear campshed model and coupling beam model, by the preceding campshed model and the rear campshed model
It is connected by the coupling beam model, in offering slip casting hole on the rear campshed model, is opened up on the preceding campshed model
There is diagonal brace perforation；
Diagonal brace model, the diagonal brace model inner hollow and the first end opening are provided, by the first end of the diagonal brace model
The slip casting hole is connected to, the second end of the diagonal brace model is arranged in the diagonal brace perforation, and in the diagonal brace mould
Second end of type opens up slurry outlet so that the preceding campshed model, rear campshed model, the coupling beam model and the diagonal brace
Model combines to form Pile Soil-support combination supporting system model；
There is provided and test native case, the Pile Soil-support combination supporting system model and experiment soil are inserted in the native case of experiment
Body, the preceding campshed model, the rear campshed model and the diagonal brace model is set to be inserted in the experiment soil body；
Slurries feed system is provided, the slurries feed system is connected with the slip casting hole by Grouting Pipe；
Open the slurries feed system, inject slurries into the diagonal brace model using the Grouting Pipe, slurries via
The slurry outlet of the diagonal brace model is flowed into the experiment soil body；
During setting grouting amount to be achieved, the slurries feed system is closed, stops slip casting；
System for monitoring displacement is provided, the system for monitoring displacement is installed on the Pile Soil-support combination supporting system model
With the native case of experiment, displacement data of the Pile Soil-support combination supporting system model relative to the native case of experiment is gathered；
Data handling system is provided, the data handling system is connected to the system for monitoring displacement, obtains institute's rheme
The displacement data that monitoring system collects is moved, as displacement initial value；
Excavate the preceding campshed model it is remote it is described after campshed model side the experiment soil body, simulating excavation,
And using the system for monitoring displacement gather in real time the Pile Soil-support combination supporting system model in digging process relative to
The displacement data of the native case of experiment；And
Made and opened using the displacement data of the data handling system in the displacement initial value and digging process
The change in displacement rule of the Pile Soil-support combination supporting system model during digging.
The simulation experiment method of the Pile Soil-support combination supporting system mechanism of action, which further improves, to be, is being made
After obtaining the change in displacement rule, in addition to step：
One kind in the grouting amount of the building-in depth of the preceding campshed model of change and rear campshed model, spacing or diagonal brace model or
It is a variety of；
Obtain the change in displacement rule of the Pile Soil-support combination supporting system model under different situations；
Selection meets the change in displacement rule of actual condition from different change in displacement rules, configure rational Pile Soil-
Support the design and construction parameter of combination supporting system model.
The simulation experiment method of the Pile Soil-support combination supporting system mechanism of action, which further improves, to be, is institute
State during Pile Soil-support combination supporting system model and the experiment soil body are inserted in the native case of experiment, including step：
Load the experiment soil body to preceding campshed model and the setting bottom position of rear campshed model in the native case of experiment；
The Pile Soil-support combination supporting system model is put into the setting position in the native case of experiment；
Continue the addition experiment soil body into the experiment native case, until the experiment soil body and the coupling beam model surface are neat
It is flat.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 be the embodiment of the present invention in excavation of foundation pit before Pile Soil-support combination supporting system mechanism of action simulation
The schematic diagram of experimental rig.
Fig. 2 be the embodiment of the present invention in excavation of foundation pit after Pile Soil-support combination supporting system mechanism of action simulation
The schematic diagram of experimental rig.
Fig. 3 is the flow of the simulation experiment method of Pile Soil-support combination supporting system mechanism of action in the embodiment of the present invention
Figure.
In figure：1- tests native case, the 2- experiment soil bodys, campshed model before 3-, campshed model after 4-, 5- coupling beam models, and 6- is solid
Determine bolt, 7- diagonal brace models, 8- injecting cement pastes, 9- experimental desks, 10- data processors, 11- data collecting instruments, 12- laser displacements biography
Sensor, 13- laser targets, 14- data lines, 15- air pressure supply arrangements, 16- slurries containers, 17- slurries, 18- gas
Pipe, 19- pneumatic control valves, 20- slurries control valves, 21- air bleeding valves, 22-Grouting Pipe.
Embodiment
Illustrate embodiments of the present invention below by way of specific instantiation, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through specific realities different in addition
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
The action effect of Pile Soil-support combination supporting system, building-in depth with forward and backward campshed, the spacing of the two and tiltedly
The grouting amount of support has very big relation.However, so far, the mechanism of action of Pile Soil-support combination supporting system does not have so far
It is substantially to solution, during design by engineering experience.
In order to carry out the research of Pile Soil-support combination supporting system action effect in a deep going way, the build-in for specifying forward and backward campshed is deep
Degree, the factor such as grouting amount of the spacing of the two and diagonal brace are optimal forward and backward so as to obtain to the Influencing Mechanism of the support system
Campshed building-in depth, spacing and diagonal brace grouting amount, reach reasonable selection Pile Soil-support design and the purpose of construction parameter, it is just necessary
Possess the model test apparatus and test method of a kind of lab simulation Pile Soil-support combination supporting system mechanism of action, it is existing at present
Technology in this field on belong to blank.
First, refering to providing a kind of Pile Soil-support combination supporting system shown in Fig. 1 and Fig. 2, in embodiments of the invention
The simulation test device of the mechanism of action, it is mainly by testing native case 1, preceding campshed model 3, rear campshed model 4, coupling beam model 5, tiltedly
Hold mode type 7, slurries feed system, system for monitoring displacement and data handling system each several part are formed, and are specifically included：Test native case 1,
Test the soil body 2, preceding campshed model 3, rear campshed model 4, coupling beam model 5, fixing bolt 6, diagonal brace model 7, injecting cement paste 8, experiment
Table 9, data processor 10, data collecting instrument 11, laser displacement sensor 12, laser target 13, data line 14, air pressure supply
To equipment 15, slurries container 16, slurries 17, tracheae 18, pneumatic control valve 19, slurries control valve 20, air bleeding valve 2, slip casting
Pipe 22.
It is an open-topped cuboid container to test native case 1, and it is internal for holding the experiment soil body 2.
Preceding campshed model 3 is located at simulation margin of foundation pit to be excavated, for simulating actual Pile Soil-support combination supporting system
In front-seat pile body.A circular diagonal brace perforation is provided with preceding campshed model 3, the diameter that diagonal brace is perforated is straight with diagonal brace model 7
Footpath is equal, and diagonal brace model 7 can be allowed to be just passed through.Afterwards campshed model 4 away from simulation margin of foundation pit, for simulate actual Pile Soil-
Support the heel row pile body in combination supporting system.A circular slip casting hole is provided with campshed model 4 afterwards, is injected tiltedly as slurries 17
The passage of hold mode type 7, the outside of slip casting hole are connected with Grouting Pipe 22, and inner side is connected with diagonal brace model 7.
Coupling beam model 5 is used to connect at the top of preceding campshed model 2 and rear campshed model 3, forms a gate-type knot
The mass action of structure, the preceding campshed model 2 of enhancing and rear campshed model 3.The length of coupling beam model 5 can change, such as using flexible
Rod model, or the coupling beam model of different length is changed, for simulating between the difference between preceding campshed model 3 and rear campshed model 4
Away from.
Diagonal brace model 7 be a upper end open hollow circular tubular structure, bottom fix one cone block (or other
The block of shape), slurry outlet is provided with the block and its neighbouring round tubular structure (i.e. the lower end of diagonal brace model 7), as
Slurries 17 enter the access opening of the experiment soil body 2.
Experimental desk 9 is used for placing data collecting instrument 11 and data processor 10, wherein, data collecting instrument 11 and data processing
Device 10 constitutes the data handling system of apparatus of the present invention, and data processor can further use computer.
Data processor 10 is built with data monitoring platform, for the experiment read with gathered in processing data Acquisition Instrument 11
Data, it is connected by data line 14 with data collecting instrument 11.
Data collecting instrument 11 is used for the data for gathering the measurement of laser displacement sensor 12, passes through data line 14 and laser
Displacement transducer 12 is connected.
Laser displacement sensor 12 is arranged in the side wall for testing native case 1, for measuring the displacement of laser target 13.Laser
The top of campshed model 3 or rear campshed model 4 before target 13 is fixed on；In the present embodiment, laser target 13 uses mark post, fixed
At the top of preceding campshed model 3.Laser target 13 is oppositely arranged with laser displacement sensor 12, is used as laser displacement sensing
The reflection unit of device 12, for reflecting the displacement of preceding campshed model 3 and rear campshed model 4.Wherein, the He of laser displacement sensor 12
Laser target 13 constitutes the system for monitoring displacement of apparatus of the present invention.
Air pressure supply arrangement 15 be used for give slurries container 16 provide air pressure, air pressure supply arrangement 15 by tracheae 18 with
Slurries container 16 connects, so as to which the slurries 17 of the inside of slurries container 16 are pressed into diagonal brace model by Grouting Pipe 22
In 7, and enter the experiment soil body 2.Wherein, air pressure supply arrangement 15 and slurries container 16 constitute the slurries supply of the present invention
System.
Slurries container 16 is used to hold slurries 17, and installs tracheae 18, the other end in the one end of slurries container 16
Grouting Pipe 22 is installed.A hole is respectively provided with the top and bottom of slurries container 16, the hole of upper end is used to install tracheae 18,
The hole of lower end is used to install Grouting Pipe 22, and sets pneumatic control valve 19 and slurries to control respectively on tracheae 18 and Grouting Pipe 22
Valve 20 is used to control the entrance of gas and the outflow of slurries 17 respectively.In the hole of the upper end of slurries container 16 installation tracheae 18
Side is also provided with the air bleeding valve 21 that a hole is used to install slurries container, and the air bleeding valve 21 is used for release slurries at any time and held
Air pressure in container 16, in favor of the pressure control in slurries container 16.
As a preferred embodiment, the native preceding campshed model 3 of the arranged on left and right sides Edge Distance of case 1 and rear campshed mould are tested
The minimum distance of type 4 is at least 2 times of preceding campshed model 3 and the rear length of campshed model 4, to meet spacing effect.
As a preferred embodiment, preceding campshed model 3 and the top of rear campshed model 4 and the both ends of coupling beam model 5 are opened
Hole, for coupling beam model 5 and preceding campshed model 3 and rear campshed model 4 are connected, therefore, preceding campshed model 3, after
Campshed model 4 and the detachable assembling type of coupling beam model 5 are connected, and are easy to dismount, change.
Coordinate shown in Fig. 2, a kind of Pile Soil-support combination supporting system mechanism of action is additionally provided in embodiments of the invention
Simulation experiment method, it mainly comprises the following steps：
Step 101：The preceding campshed model of offer, rear campshed model and coupling beam model, by preceding campshed model and rear campshed model
It is connected by coupling beam model, in offering slip casting hole on rear campshed model, is perforated in offering diagonal brace on preceding campshed model；
Step 102：Diagonal brace model, diagonal brace model inner hollow and the first end opening are provided, by the first end of diagonal brace model
Slip casting hole is connected to, the second end of diagonal brace model is arranged in diagonal brace perforation, and is opened up out in the second end of diagonal brace model
Starch hole so that preceding campshed model, rear campshed model, coupling beam model and diagonal brace model combine to form Pile Soil-support combination supporting system
Model；
Step 103：There is provided and test native case, Pile Soil-support combination supporting system model and experiment soil are inserted in native case in testing
Body, preceding campshed model, rear campshed model and diagonal brace model is set to be inserted in the experiment soil body；
Step 104：Slurries feed system is provided, slurries feed system is connected with slip casting hole by Grouting Pipe；
Step 105：Slurries feed system is opened, injects slurries into diagonal brace model using Grouting Pipe, slurries are via diagonal brace
The slurry outlet of model is flowed into the experiment soil body；
Step 106：During setting grouting amount to be achieved, slurries feed system is closed, stops slip casting；
Step 107：System for monitoring displacement is provided, system for monitoring displacement is installed on Pile Soil-support combination supporting system model
With testing native case, collection Pile Soil-support combination supporting system model is relative to the displacement data for testing native case；
Step 108：Data handling system is provided, data handling system is connected to system for monitoring displacement, obtains displacement prison
The displacement data that examining system collects, as displacement initial value；
Step 109：The experiment soil body of the side of the remote rear campshed model of the preceding campshed model of excavation, simulating excavation,
And Pile Soil-support combination supporting system model in digging process is gathered in real time using system for monitoring displacement relative to the native case of experiment
Displacement data；And
Step 110：Made and excavated using displacement data of the data handling system in displacement initial value and digging process
The change in displacement rule of Pile Soil-support combination supporting system model in journey.
It is preferred that after displacement changing rule is made to, in addition to step：
One kind in the grouting amount of the building-in depth of the preceding campshed model of change and rear campshed model, spacing or diagonal brace model or
It is a variety of；
Obtain the change in displacement rule of Pile Soil-support combination supporting system model under different situations；
Selection meets the change in displacement rule of actual condition from different change in displacement rules, configure rational Pile Soil-
Support the design and construction parameter of combination supporting system model.
It is preferred that during Pile Soil-support combination supporting system model and the experiment soil body are inserted in the native case of experiment,
Including step：
Load the experiment soil body in native case to preceding campshed model and the setting bottom position of rear campshed model in testing；
Pile Soil-support combination supporting system model is put into the setting position tested in native case；
Continue to the addition experiment soil body in native case is tested, until the experiment soil body flushes with coupling beam model surface.
Specific to the simulated test of the Pile Soil in previous embodiment-support combination supporting system mechanism of action, such as Fig. 2 and Fig. 3
It is shown, using the device, the concrete operation step of the experiment of progress lab simulation Pile Soil-support combination supporting system mechanism of action
It is as follows：
1) diagonal brace model 7 is perforated through the diagonal brace on preceding campshed model 3, rear campshed mould is connected to by fixing bolt 6
In type 4, the upper end open of diagonal brace model 7 is set to be docking together with the circular hole on rear campshed model 4；
2) coupling beam model 5 is fixed together by fixing bolt 6 and preceding campshed model 3 and rear campshed model 4, with diagonal brace
Model 7 forms Pile Soil-support combination supporting system model together；
3) load the experiment soil body 2 in native case 1 is tested and arrive preceding campshed model 3 and the rear bottom position of campshed model 4, then will
The Pile Soil being made up of preceding campshed model 3, rear campshed model 4, coupling beam model 5 and diagonal brace model 7-support combination supporting system model
It is put into the precalculated position tested in native case 1；
4) continue the addition into experiment native case 1 and test the soil body 2 until soil body surface and the upper surface flush of coupling beam model 5；
5) circular hole for being used for slurries 17 on slurries container 16 and rear campshed model 4 and injecting is connected by Grouting Pipe 22；
6) pneumatic control valve 19 of the upper end of slurries container 16 and the air bleeding valve 21 of slurries container and slurry are closed
The slurries control valve 20 of the lower end of liquid container 16, slurries 17 are added in slurries container 16；
7) air pressure supply arrangement 15 is started, air pressure is reached experiment needs size；
8) the slurries control of the pneumatic control valve 19 of the upper end of slurries container 16 and the lower end of slurries container 16 is opened
Valve 20 processed, makes slurries 17 be entered by Grouting Pipe 22 in diagonal brace model 7, and is noted by the aperture of the latter half of diagonal brace model 7
Enter into the neighbouring experiment soil body 2；
9) when slurries 17 reach the injection rate of experiment needs, the pneumatic control valve 19 of the upper end of slurries container 16 is closed
With the slurries control valve 20 of the lower end of slurries container 16, air pressure supply arrangement 15 is closed, opens the upper end of slurries container 16
Slurries container air bleeding valve 21, the air pressure inside of release slurries container 16；
10) after slurries 17 reach solidification needs time form complete injecting cement paste 8 after, mark post 13 is fixed to front-seat
The top of stake model 3, laser displacement sensor 12 is installed in the side wall of model clay case 1；
11) laser displacement sensor 12 and data collecting instrument 11, and data collecting instrument are connected by data line 14
11 with data processor 10, connect the power supply of data collecting instrument 11 and data processor 10；
12) log-on data Acquisition Instrument 11 and data processor 10, the data monitoring platform in turn-on data processor, start
Gather the data of laser displacement sensor 12, and the initial value using data now as Optical displacement sensor 12；
13) the experiment soil body 2 on the preceding right side of campshed model 3 is dug out, simulating excavation, dug always to the position needed,
As shown in Figure 2；
14) data of collection laser displacement sensor 12 are continued, until data stabilization, by being adopted with data in step 12)
The initial value that collection instrument 11 collects is contrasted, that is, obtains the displacement of Pile Soil in Excavation Process-support combination supporting system model
Changing rule.
15) the preceding campshed model 3 and rear building-in depth of campshed model 4, the spacing and grouting amount of diagonal brace model 7, experiment are changed
The different preceding campshed models 3 of simulation, the rear building-in depth of campshed model 4, it is different before campshed mould, 3, the rear spacing of campshed model 4 and tiltedly
The change in displacement rule of Pile Soil-support combination supporting system model in the case of 7 different grouting amounts of hold mode type, obtains Pile Soil-support
The mechanism of action of combination supporting system.
The simulation test device and method of Pile Soil-support combination supporting system mechanism of action of the present invention, can simulate difference
Pile Soil-support combination supporting system in the case of forward and backward campshed building-in depth, spacing and diagonal brace difference grouting amount is opened in foundation ditch
Change in displacement rule during digging, the mechanism of action of Pile Soil-support combination supporting system is obtained, it is optimal forward and backward so as to obtain
Campshed building-in depth, spacing and grouting amount, reach reasonable selection Pile Soil-support design and the purpose of construction parameter.
It should be noted that structure, ratio, size depicted in this specification institute accompanying drawings etc., only coordinating
Content disclosed in bright book, so that those skilled in the art understands and reads, it is not limited to the enforceable limit of the present invention
Fixed condition, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size, not
Influence under the effect of present invention can be generated and the purpose that can reach, all should still fall and be obtained in disclosed technology contents
In the range of covering.It is meanwhile cited such as " on ", " under ", "left", "right", " centre " and " one " etc. in this specification
Term, understanding for narration is merely convenient to, and is not used to limit the enforceable scope of the present invention, the change of its relativeness or tune
It is whole, in the case where changing technology contents without essence, when being also considered as the enforceable category of the present invention.
Described above is only presently preferred embodiments of the present invention, not does any formal limitation to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any to be familiar with this professional technology people
Member, in the range of technical solution of the present invention is not departed from, when the technology contents using the disclosure above make a little change or repair
The equivalent embodiment for equivalent variations is adornd, as long as being the content without departing from technical solution of the present invention, the technology according to the present invention is real
Any simple modification, equivalent change and modification that confrontation above example is made, still fall within the scope of technical solution of the present invention
It is interior.
Claims (10)
- A kind of 1. simulation test device of Pile Soil-support combination supporting system mechanism of action, it is characterised in that including：Native case is tested, the experiment soil body is equipped with the native case of experiment；Preceding campshed model, it is inserted in the experiment soil body of simulation margin of foundation pit；Campshed model afterwards, it is inserted in the experiment soil body, the rear campshed model passes through coupling beam mould with the preceding campshed model Type is connected, and slip casting hole is offered on the rear campshed model；The diagonal brace model of inner hollow, the first end opening of the diagonal brace model are simultaneously connected to the slip casting hole, the diagonal brace In the second end insertion experiment soil body of model and run through the preceding campshed model, the second end of the diagonal brace model is provided with out Starch hole；Slurries feed system, the slip casting hole is connected to by Grouting Pipe；System for monitoring displacement, including the laser displacement sensor and laser target being oppositely arranged, the laser displacement sensor are consolidated Due to the side wall of the native case of experiment, the laser target is fixed on the top of the preceding campshed model or the rear campshed model Portion；AndData handling system, including be connected to the data collecting instrument of the laser displacement sensor and be connected to the data acquisition The data processor of instrument.
- 2. the model test apparatus of Pile Soil as claimed in claim 1-support combination supporting system mechanism of action, it is characterised in that： Diagonal brace perforation is offered on the preceding campshed model, the second end of the diagonal brace model is arranged in the diagonal brace perforation.
- 3. the model test apparatus of Pile Soil as claimed in claim 1-support combination supporting system mechanism of action, it is characterised in that： The slurries feed system includes air pressure supply arrangement and slurries container, the air pressure supply arrangement by tracheae with it is described Slurries container is connected, and the slurries container is connected to the slip casting of the rear campshed model by the Grouting Pipe Hole.
- 4. the model test apparatus of Pile Soil as claimed in claim 3-support combination supporting system mechanism of action, it is characterised in that： The tracheae is connected to the top of the slurries container, and the Grouting Pipe is connected to the bottom of the slurries container.
- 5. the model test apparatus of Pile Soil as claimed in claim 3-support combination supporting system mechanism of action, it is characterised in that： The tracheae is provided with pneumatic control valve, and the Grouting Pipe is provided with slurries control valve.
- 6. the model test apparatus of Pile Soil as claimed in claim 3-support combination supporting system mechanism of action, it is characterised in that： The top of the slurries container is provided with air bleeding valve.
- 7. the model test apparatus of Pile Soil as claimed in claim 1-support combination supporting system mechanism of action, it is characterised in that： The side wall of the native case of experiment is at least the preceding campshed mould apart from the distance of the preceding campshed model or the rear campshed model Twice of greater depth in type or the rear campshed model.
- 8. the simulation experiment method of a kind of Pile Soil-support combination supporting system mechanism of action, it is characterised in that including step：The preceding campshed model of offer, rear campshed model and coupling beam model, the preceding campshed model and the rear campshed model are passed through The coupling beam model is connected, and slip casting hole is offered on campshed model afterwards in described, oblique in being offered on the preceding campshed model Support perforation；Diagonal brace model, the diagonal brace model inner hollow and the first end opening are provided, the first end of the diagonal brace model is connected In the slip casting hole, the second end of the diagonal brace model is arranged in the diagonal brace perforation, and in the diagonal brace model Second end opens up slurry outlet so that the preceding campshed model, rear campshed model, the coupling beam model and the diagonal brace model Combination forms Pile Soil-support combination supporting system model；There is provided and test native case, the Pile Soil-support combination supporting system model and the experiment soil body are inserted in the native case of experiment, The preceding campshed model, the rear campshed model and the diagonal brace model is set to be inserted in the experiment soil body；Slurries feed system is provided, the slurries feed system is connected with the slip casting hole by Grouting Pipe；The slurries feed system is opened, injects slurries into the diagonal brace model using the Grouting Pipe, slurries are via described The slurry outlet of diagonal brace model is flowed into the experiment soil body；During setting grouting amount to be achieved, the slurries feed system is closed, stops slip casting；System for monitoring displacement is provided, the system for monitoring displacement is installed on the Pile Soil-support combination supporting system model and institute The native case of experiment is stated, gathers displacement data of the Pile Soil-support combination supporting system model relative to the native case of experiment；Data handling system is provided, the data handling system is connected to the system for monitoring displacement, obtains the displacement prison The displacement data that examining system collects, as displacement initial value；Excavate the experiment soil body of the side of the remote rear campshed model of the preceding campshed model, simulating excavation, and profit The Pile Soil-support combination supporting system model in digging process is gathered in real time relative to described with the system for monitoring displacement Test the displacement data of native case；AndMade and excavated using the displacement data of the data handling system in the displacement initial value and digging process The change in displacement rule of the Pile Soil-support combination supporting system model in journey.
- 9. the simulation experiment method of Pile Soil as claimed in claim 8-support combination supporting system mechanism of action, it is characterised in that After making obtains the change in displacement rule, in addition to step：One kind or more in the grouting amount of the building-in depth of the preceding campshed model of change and rear campshed model, spacing or diagonal brace model Kind；Obtain the change in displacement rule of the Pile Soil-support combination supporting system model under different situations；Selection meets the change in displacement rule of actual condition from different change in displacement rules, configures rational Pile Soil-support group Close the design and construction parameter of support system model.
- 10. the simulation experiment method of Pile Soil as claimed in claim 8-support combination supporting system mechanism of action, its feature exist In, during Pile Soil-support combination supporting system model and the experiment soil body is inserted in the native case of experiment, including step：Load the experiment soil body to preceding campshed model and the setting bottom position of rear campshed model in the native case of experiment；The Pile Soil-support combination supporting system model is put into the setting position in the native case of experiment；Continue the addition experiment soil body into the experiment native case, until the experiment soil body flushes with the coupling beam model surface.
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