CN105735377B - A kind of adjustable waterproof foundation pit support device based on excavation of foundation pit model test - Google Patents
A kind of adjustable waterproof foundation pit support device based on excavation of foundation pit model test Download PDFInfo
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- CN105735377B CN105735377B CN201610204554.2A CN201610204554A CN105735377B CN 105735377 B CN105735377 B CN 105735377B CN 201610204554 A CN201610204554 A CN 201610204554A CN 105735377 B CN105735377 B CN 105735377B
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- foundation pit
- retaining wall
- support
- excavation
- model test
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of adjustable waterproof foundation pit support device based on excavation of foundation pit model test.The device includes retaining wall and support.Retaining wall top is provided with multiple tracks bolt, is bolted earth-retaining wall bracket；Some fixing bolts are reserved with the middle part of retaining wall, both sides are provided with watertight rubber bar；Watertight rubber bar ensures that leak does not occur with model casing contact surface in retaining wall moving process；One end of support has inner thread mouth, and inner thread mouth is threadedly coupled with fixing bolt, realizes the installation of support.The apparatus structure is reasonable, and installation operation is convenient, and available for the displacement and deformation of flexible retaining wall in excavation of foundation pit model test under simulated groundwater environment, a kind of effective means is provided to carrying out related excavation of foundation pit model test and research.
Description
Technical field
The present invention relates to a kind of adjustable waterproof foundation pit support device based on excavation of foundation pit model test, more particularly to
The flexible retaining wall excavation of foundation pit model test apparatus of groundwater environment and the change of retaining wall embedded depth can be considered simultaneously, it is convenient
Excess pore water pressure, soil pressure and foundation pit deformation in the Excavation Process soil body etc. are monitored.
Background technology
Deep-foundation pit engineering in strand, riparian area faces rich groundwater, and construction environment is complicated and difficulty of construction is big
Deng challenge, wherein foundation pit deformation caused by groundwater effect and destabilization problems are the material risk sources of such regional deep-foundation pit engineering
One of.
Excavation of foundation pit model test does not consider groundwater effect more at present, and the experiment soil body selects dry sand, mainly monitors foundation ditch
The soil pressure and foundation pit deformation of the soil body are excavated, the excavation of foundation pit situation with there is groundwater effect has larger difference.Consider underground water
Excavation of foundation pit model test is acted on, having research, (experiment of Sun Wei coastal region deep basal pit characters and theoretical research [D] Zhejiang are big
Learn, 2015.) excess pore water pressure in the soil body can only be monitored using the method for fixed retaining wall, this method, it is accurate to obtain
Soil pressure and foundation pit deformation data.Separately having research, (grand thin sight research [D] the Tongji University of Peng Shu power sand barricade failure mechanisms is big
Learn, 2007.) epoxy resin connection retaining wall and model casing, the party are smeared after the coarse processing of method that passes through corona using film
Method can obtain excess pore water pressure, soil pressure and foundation pit deformation data in the experiment soil body, but film Joining Technology is complex,
Film may cause breakage in moving process due to soil particle friction when lateral diaphragm wall displacement is larger, can not smoothly complete experiment or enter
Row repeats to test.Therefore, more simply, exactly the movement of retaining wall is that strand, riverine foundation ditch are opened under simulated groundwater environment
Digging in model test needs to solve the problems, such as.
Lot of experiments research shows that stress, deformation and the stability of foundation ditch and retaining wall embedded depth have much relations.
In Practical Project, design can usually include multiple retaining wall embedded depth schemes, be calculated finally by finite element numerical, work
The method of journey analogies of experience determines unique retaining wall embedded depth design, still lacks the earth-retaining of related adjusting penetrating depth
The related foundation ditch design reference opinion that wall excavation of foundation pit model test provides.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the invention provides a kind of based on the adjustable of excavation of foundation pit model test
Waterproof foundation pit support device is saved, the retaining wall movement under effectively accurate simulated groundwater environment in Excavation Process is solved and asks
Topic, and repeatable experimental study difference retaining wall embedded depth is to foundation ditch Water And Earth Pressures and the influence of deformation.
The technical solution adopted for the present invention to solve the technical problems is：It is a kind of based on the adjustable of excavation of foundation pit model test
Waterproof foundation pit support device is saved, the device includes retaining wall and support, and the retaining wall top is provided with multiple tracks bolt, passes through bolt
Fixed retaining wall support；Some fixing bolts are reserved with the middle part of the retaining wall, both sides are provided with watertight rubber bar；The sealing rubber
Adhesive tape ensures that leak does not occur with model casing contact surface in retaining wall moving process；One end of the support has inner thread mouth,
Inner thread mouth is threadedly coupled with fixing bolt, realizes the installation of support.
Further, the support includes solid aluminium bar, expansion link and support connecting bolt；It is provided with the solid aluminium bar
Some grooves, one end have inner thread mouth；The expansion link is hollow aluminum pipe, and some screwed holes are provided with expansion link；The branch
Support connecting bolt props up the groove of solid aluminium bar through the screwed hole on expansion link so that solid aluminium bar and expansion link closely connect
Connect.
Further, the support includes first support bar, second support bar and sleeve；One end of the first support bar
With external screw thread；One end of the second support bar has inner thread mouth, and the other end has external screw thread；The sleeve has interior spiral shell
Line passage, threaded one end connection first support bar, other end threaded connection second support bar.
Further, the watertight rubber bar is made up of semi-cylindrical rubber cavity and sheet rubber；The sheet rubber insertion
In the line of rabbet joint of retaining wall side, smear silica gel sealing and be arranged on retaining wall.
Further, the retaining wall is aluminium sheet, and the retaining wall rigidity that its thickness need to be simulated by model test determines.
Further, the earth-retaining wall bracket is stainless steel plate.
Further, two sides that the model casing contacts with retaining wall are safety glass.
Further, the position of the bolt is determined by retaining wall embedded depth, and road number is by change retaining wall embedded depth
Excavation of foundation pit experiment need the group number that adjusts to determine.
Further, the quantity and position that the quantity of the fixing bolt and position are supported by foundation ditch determine.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, the present invention in retaining wall in Excavation Process due to inside and outside hole soil pressure difference corresponding displacement can occur, supervise
Excess pore water pressure, soil pressure and the foundation pit deformation under different excavating conditions in soil mass of foundation pit are surveyed, compared to fixed earth-retaining
Water And Earth Pressures and the foundation pit deformation response that the test method of wall can more reflect in actual base pit engineering digging process.
2nd, the present invention can simulated groundwater effect base pit engineering environment, using by semi-cylindrical rubber cavity and sheet rubber
The customization watertight rubber bar sealing of composition；By in the line of rabbet joint of sheet rubber insertion retaining wall side, silica gel sealing is smeared sealing rubber
Adhesive tape is arranged on retaining wall, on the one hand can be reached the purpose for preventing leak, on the other hand be ensured in retaining wall moving process
Watertight rubber bar will not peel off；Semi-cylindrical rubber cavity can be crushed in retaining wall moving process, increase sealing rubber
The contact surface of adhesive tape and safety glass, being further ensured that retaining wall, sealing rubber strip and model casing contact surface be not in moving process
Generation leak, operation principle is simple, and device is simple, and installation operation is convenient.
3rd, the present invention is provided with the bolt that multiple tracks is used for fixed retaining wall support on retaining wall top, it is possible to achieve different earth-retainings
The test simulation of wall embedded depth, need to make different height compared to excavation models experiment of the conventional needle to different embedded depths
Retaining wall come complete experiment method, eliminate different height retaining wall make the step for, saved experimentation cost and
The modelling time.
4th, the present invention can be with the propping process in accurate simulation Excavation Process, will not be to base in inner support installation process
Cheating the soil body not excavated has disturbing influence；Connection is threadably secured between inner support and retaining wall, than traditional foundation ditch mould
Type tests the method that inner support frame was located on retaining wall or lain directly against retaining wall and realizes propping, more can objectively reflect reality
Propping situation when border base pit engineering excavates；By controlling solid aluminum shank diameter and hollow aluminium bar wall thickness to realize internal support of foundation pit
The simulation of rigidity, more objectively reflect Effects on Engineering of the inner support to excavation of foundation pit..
5th, the present invention uses retractable supports element, the excavation of foundation pit experiment of different in width can be simulated, compared to tradition
Excavation of foundation pit model test using regular length support or retractable supports be only used for realize support installation experiment think
Road, same set of experimental rig can be used to carry out the excavation of foundation pit experiment of multigroup different in width, reduce the repacking to experimental rig,
Experimentation cost and modelling time are saved, operation principle is simple, easy to operate, has very big practicality.
6th, the present invention according to the demand of geotechnical model test, can adjust the quantity of inner support element, and on retaining wall
The position of inner support fixing bolt and quantity, simulate the excavation situation of different foundation ditches.
Brief description of the drawings
Fig. 1 (a) is the adjustable waterproof foundation pit support device side view supported using the first kind.
Fig. 1 (b) is the adjustable waterproof foundation pit support device side view supported using the second class.
Fig. 2 is retaining wall plan.
Fig. 3 is sealing rubber strip profile.
Fig. 4 (a) is to be illustrated using application of the adjustable waterproof foundation pit support device of first kind support in model test
Figure.
Fig. 4 (b) is to be illustrated using application of the adjustable waterproof foundation pit support device of the second class support in model test
Figure.
In figure：Retaining wall 1；Earth-retaining wall bracket 2；Bolt 3；Watertight rubber bar 4；Semi-cylindrical rubber cavity 4-1；Sheet rubber
4-2；Fixing bolt 5；Support 6；Solid aluminium bar 6-1；Hollow aluminium bar 6-2；Support connecting bolt 6-3；First support bar 6-4；The
Two support bar 6-5；Sleeve 6-6；Model casing 7；Model casing base 8；Reaction frame 9；Test the soil body 10.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
As shown in Fig. 1 (a), Fig. 1 (b), adjustable waterproof pattern foundation pit supporting structure dress of the present invention based on excavation of foundation pit model test
Put, including retaining wall 1 and support 6.The top of retaining wall 1 is provided with multiple tracks bolt 3, passes through the fixed retaining wall support 2 of bolt 3；
The middle part of retaining wall 1 is reserved with some fixing bolts 5, and both sides are provided with watertight rubber bar 4；The watertight rubber bar 4 ensures gear
Leak does not occur with the contact surface of model casing 7 in the moving process of cob wall 1；One end of the support 6 has inner thread mouth, inner thread mouth
It is threadedly coupled with fixing bolt 5, realizes the installation of support 6.
Preferably, the support 6 can use following two forms：
Shown in one, such as Fig. 1 (a), the support 6 includes solid aluminium bar 6-1, expansion link 6-2 and support connecting bolt 6-3；
Some grooves are provided with the solid aluminium bar 6-1, one end has inner thread mouth；The expansion link 6-2 is hollow aluminum pipe, expansion link
Some screwed holes are provided with 6-2；The support connecting bolt 6-3 selects M6 bolts, is propped up through the screwed hole on expansion link 6-2
Solid aluminium bar 6-1 groove so that solid aluminium bar 6-1 and expansion link 6-2 are closely connected.
Shown in two, such as Fig. 1 (b), the support 6 includes first support bar 6-4, second support bar 6-5 and sleeve 6-6；Institute
The one end for stating first support bar 6-4 has external screw thread；One end of the second support bar 6-5 has inner thread mouth, other end tool
There is external screw thread；The sleeve 6-6 has an internal thread passage, threaded one end connection first support bar 6-4, other end threaded connection the
Two support bar 6-5.
As shown in Fig. 2 the retaining wall 1 is certain thickness aluminium sheet, the retaining wall that its thickness need to be simulated by model test
Rigidity Calculation obtains.The earth-retaining wall bracket 2 is made up of thickness of 20mm stainless steel plate.The bolt 3 selects M8 bolts, its
Position is determined that road number needs what is adjusted by the excavation of foundation pit experiment of change retaining wall embedded depth by the embedded depth of retaining wall 1
Group number determines.The fixing bolt 5 selects M8 bolts, and the quantity and position that its quantity and position are supported by foundation ditch determine.
As shown in figure 3, the watertight rubber bar 4 is made up of semi-cylindrical rubber cavity 4-1 and sheet rubber 4-2；The rubber
In the line of rabbet joint of film 4-2 insertion retaining walls 1 side, smear silica gel sealing and be arranged on retaining wall 1, on the one hand can reach prevents
The purpose of leak, on the other hand ensure that sealing rubber strip will not peel off in retaining wall moving process；The semi-cylindrical rubber
Glue chamer body 4-1 can be crushed in retaining wall moving process, increase the contact surface of watertight rubber bar and safety glass, further protect
Demonstrate,prove retaining wall sealing rubber strip in moving process and leak does not occur with model casing contact surface.
As shown in Fig. 4 (a), Fig. 4 (b), present invention can apply to excavation of foundation pit model test under groundwater environment.The mould
Two sides that molding box 7 contacts with retaining wall 1 are 20mm thickness safety glass, are easy to retaining wall and the prison of land movement in experiment
Survey, to ensure that drainage does not occur in the moving process of retaining wall 1, the manufactured size required precision of model casing 7 is higher.
The course of work of the present invention is as follows：It will be kept off according to the position of the design embedded depth selection bolt 3 of retaining wall 1 first
Wall bracket 2 is fixed on retaining wall 1；Retaining wall 1 is placed in model casing 7, makes watertight rubber bar 4 and model on retaining wall 1
The safety glass of the both sides of case 7 is vertical and is adjacent to；And backward model casing 7 inserts the experiment soil body 10, while embedded pore water pressure passes
Sensor and soil pressure cell, 10 abundant saturation of the soil body will be tested；Displacement transducer monitoring soil deformation and retaining wall displacement are installed；By
Layer excavates the experiment soil body 10 in the left side of retaining wall 1, successively excavates successively installation support 6；By the internal thread and gear that support 6 one end
Fixing bolt 5 on cob wall 1 connects, and the length by adjusting support 6 is allowed to hold out against is fixed on model casing bottom jointly with model casing 7
Reaction frame 9 on seat 8, complete the installation of support 6.During whole excavation of foundation pit experiment, the super quiet pore water in the soil body is monitored
Pressure, soil pressure and foundation pit deformation, correlation test data are obtained, certain advisory opinion is provided for similar design of foundation pit.
Claims (9)
1. a kind of adjustable waterproof foundation pit support device based on excavation of foundation pit model test, the device include retaining wall (1) and
Support (6), it is characterised in that retaining wall (1) top is provided with multiple tracks bolt (3), passes through bolt (3) fixed retaining wall support
(2)；Some fixing bolts (5) are reserved with the middle part of the retaining wall (1), both sides are provided with watertight rubber bar (4)；The watertight rubber
Bar (4) ensures that leak does not occur with model casing (7) contact surface in retaining wall (1) moving process；One end of the support (6) has
Inner thread mouth, inner thread mouth are threadedly coupled with fixing bolt (5), realize the installation of support (6).
2. a kind of adjustable waterproof foundation pit support device based on excavation of foundation pit model test according to claim 1, its
It is characterised by, the support (6) includes solid aluminium bar (6-1), expansion link (6-2) and support connecting bolt (6-3)；It is described solid
Some grooves are provided with aluminium bar (6-1), one end has inner thread mouth；The expansion link (6-2) is hollow aluminum pipe, expansion link (6-
2) some screwed holes are provided with；The support connecting bolt (6-3) props up solid aluminium bar through the screwed hole on expansion link (6-2)
The groove of (6-1) so that solid aluminium bar (6-1) and expansion link (6-2) closely connect.
3. a kind of adjustable waterproof foundation pit support device based on excavation of foundation pit model test according to claim 1, its
It is characterised by, the support (6) includes first support bar (6-4), second support bar (6-5) and sleeve (6-6)；Described first
One end of strut (6-4) has external screw thread；One end of the second support bar (6-5) has inner thread mouth, and the other end has outer
Screw thread；The sleeve (6-6) has an internal thread passage, threaded one end connection first support bar (6-4), other end threaded connection the
Two support bars (6-5).
4. a kind of adjustable waterproof foundation pit support device based on excavation of foundation pit model test according to claim 1, its
It is characterised by, the watertight rubber bar (4) is made up of semi-cylindrical rubber cavity (4-1) and sheet rubber (4-2)；The sheet rubber
In the line of rabbet joint of (4-2) embedded retaining wall (1) side, smear silica gel sealing and be arranged on retaining wall (1).
5. a kind of adjustable waterproof foundation pit support device based on excavation of foundation pit model test according to claim 1, its
It is characterised by, the retaining wall (1) is aluminium sheet, and the retaining wall rigidity that its thickness need to be simulated by model test determines.
6. a kind of adjustable waterproof foundation pit support device based on excavation of foundation pit model test according to claim 1, its
It is characterised by, the earth-retaining wall bracket (2) is stainless steel plate.
7. a kind of adjustable waterproof foundation pit support device based on excavation of foundation pit model test according to claim 1, its
It is characterised by, two sides that the model casing (7) contacts with retaining wall (1) are safety glass.
8. a kind of adjustable waterproof foundation pit support device based on excavation of foundation pit model test according to claim 1, its
It is characterised by, the position of the bolt (3) on retaining wall (1) top determines that road number is by change retaining wall by retaining wall (1) embedded depth
(1) the group number that the excavation of foundation pit experiment of embedded depth needs to adjust determines.
9. a kind of adjustable waterproof foundation pit support device based on excavation of foundation pit model test according to claim 1, its
It is characterised by, the quantity and position that the quantity of the fixing bolt (5) and position are supported by foundation ditch determine.
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| CN201610204554.2A CN105735377B (en) | 2016-04-01 | 2016-04-01 | A kind of adjustable waterproof foundation pit support device based on excavation of foundation pit model test |
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| CN201610204554.2A CN105735377B (en) | 2016-04-01 | 2016-04-01 | A kind of adjustable waterproof foundation pit support device based on excavation of foundation pit model test |
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| CN105735377B true CN105735377B (en) | 2017-11-17 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436280A (en) * | 2017-09-26 | 2017-12-05 | 中国科学院武汉岩土力学研究所 | Curtain withdrawal device and curtain withdrawal system |
| CN113049381A (en) * | 2021-03-11 | 2021-06-29 | 深圳市勘察研究院有限公司 | Foundation pit support simulation test device and system |
| CN114582219B (en) * | 2022-02-23 | 2023-08-11 | 山东高速工程建设集团有限公司 | Foundation pit adjacent building construction simulation device |
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| CN205712219U (en) * | 2016-04-01 | 2016-11-23 | 浙江大学 | A kind of waterproof foundation pit support device of scalable based on excavation of foundation pit model test |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20070052089A (en) * | 2005-11-16 | 2007-05-21 | 주식회사 삼보지반기술 | Support load measurement way of concrete pail and the installation established on base |
| CN101831924A (en) * | 2010-04-21 | 2010-09-15 | 上海交通大学 | Simulator for blocking groundwater seepage by underground structure |
| CN201876370U (en) * | 2010-10-21 | 2011-06-22 | 同济大学 | Model testing device convenient for simulating foundation pit excavation support erection |
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