CN105887926A - Open trench tunnel structure capable of preventing inhomogeneous deformation of foundation for soft soil seismic subsidence stratum - Google Patents
Open trench tunnel structure capable of preventing inhomogeneous deformation of foundation for soft soil seismic subsidence stratum Download PDFInfo
- Publication number
- CN105887926A CN105887926A CN201610378068.2A CN201610378068A CN105887926A CN 105887926 A CN105887926 A CN 105887926A CN 201610378068 A CN201610378068 A CN 201610378068A CN 105887926 A CN105887926 A CN 105887926A
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- Prior art keywords
- stratum
- open trench
- cushion
- trench tunnel
- tunnel structure
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
- E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/34—Foundations for sinking or earthquake territories
Abstract
The invention discloses an open trench tunnel structure capable of preventing inhomogeneous deformation of a foundation for a soft soil seismic subsidence stratum. The open trench tunnel structure comprises an open trench tunnel composed of a top plate, a bottom plate and side walls, backfill soil is paved on the top plate, and enclosure structures are arranged on the outer sides of the side walls. The open trench tunnel structure is characterized in that pre-compression layers are arranged between the bottom plate and the soft soil seismic subsidence stratum below the bottom plate and comprise elastic cushions, pressing plates closely attached to the top surfaces and the bottom surfaces of the elastic cushions and fasteners used for pressing the pressing plates and the elastic cushions, and the fasteners pre-compress the elastic cushions through the two pressing plates in the vertical direction and are metal wires capable of being corroded and broken under the effect of underground water. The open trench tunnel structure has the beneficial effects of being capable of adapting to different seismic subsidence deflection at different parts of the bottom of the tunnel, capable of effectively preventing local cavities, simple in structure and easy and convenient to construct.
Description
Technical field
The present invention relates to open trench tunnel field, specifically a kind of weak soil shake falls into stratum and prevents ground
The open trench tunnel structure of inhomogeneous deformation.
Background technology
Weak soil shake falls into weak soil self and a kind of phenomenon of surface subsidence when being earthquake, works as open trench tunnel
When substrate occurs shake to fall into, basement strata can be caused to settle, make structure produce sedimentation the most accordingly.But
Owing to the shake notch distortion amount of tunnel bottom different parts is different, tunnel structure will produce uneven
Sedimentation, even causes the phenomenon that between structure and understratum, come to nothing in local, this uneven heavy
Fall or the additional internal force that structure generation can be made the biggest that comes to nothing, and then make structure crack even destroy.
Therefore, engineering needs this Disasters taking steps to eliminate.
The measure taked at present mainly has two kinds, and the first is to be eliminated by stratum improving technology
Shake falls into；The second is to support by pile foundation completely, it is allowed to after shake falls into, structure disengages with substrate weak soil.
Its subject matter existed is as follows:
1, deep when weak soil and widely distributed time, the reinforcing engineering amount of stratum improvement is big, without
Ji.
When 2, using pile foundation supporting structure, the length of the stake of needs is big, quantity is many, causes
Construction investment increases considerably.
Summary of the invention
The invention aims to solve the deficiency that above-mentioned background technology exists, propose one
The shake notch distortion amount adapting to tunnel bottom different parts is different, effectively prevents local from coming to nothing,
Simple in construction, the weak soil shake of easy construction simultaneously falls into stratum and prevents the bright of ground inhomogeneous deformation
Hole structure.
In order to realize object above, a kind of weak soil shake that the present invention provides falls into stratum and prevents ground
The open trench tunnel structure of inhomogeneous deformation, including the open cut being made up of top board, base plate and side wall
Tunnel, described top board overlaid with backfill earthing, the outside of side wall is provided with goes along with sb. to guard him knot
Structure, it is characterised in that: described base plate and the shake of weak soil below fall into and are provided with precompressed between stratum
Contracting layer, described pre-compressed layer includes cushion, is close to be located at the pressure of cushion end face and bottom surface
Plate and for clamping platen and the securing member of cushion, described securing member passes through upper and lower two pieces
Pressing plate carries out precommpression to cushion, and described securing member is can to break in corrosion under groundwater effect
The tinsel opened.
As the preferred version of the present invention, described securing member is made up of thin wire and anchoring piece, institute
State thin wire pass pressing plate and cushion and be fixed on pressing plate by anchoring piece, described thin ferrum
Silk can disconnect in corrosion under groundwater effect.
Further, described anchoring piece is truncated cone-shaped, described pressing plate has and in truncated cone-shaped
The through hole that anchoring piece matches, anchoring piece is located in through hole, and described thin wire passes anchoring piece
And with its secure fit, described anchoring piece near cushion one end diameter less than anchoring piece away from
One end diameter of cushion.
Further, the base plate of described open trench tunnel with below weak soil shake fall into stratum it
Between be provided with multiple pre-compressed layer spliced the most successively.
Yet further, described cushion is prepared by polystyrene material.
The most further, described pressing plate is plastic plate or plank.
Cushion in the present invention creates compression due to precommpression, in seismic process
When occurring the weak soil shake at the bottom of tunnel to fall into, the precommpression deformation bounce-back of cushion recovers, it is therefore prevented that
The generation of structure differential settlement.Therefore, after weak soil shake falls into, pre-compressed layer is by recovering elasticity
Compression, fills the space that weak soil disengages, it is ensured that the safety of tunnel structure.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of cushion.
Fig. 3 is the structural representation of pre-compressed layer.
Fig. 4 is the structural representation after the securing member in pre-compressed layer is disconnected by corrosion.
Fig. 5 is that pre-compressed layer falls into the fundamental diagram after stratum occurs shake to fall in weak soil shake.
Fig. 6 is the stress-strain diagram of polystyrene.
Fig. 7 is the structural representation of anchoring piece.
Fig. 8 is the top view of Fig. 7.
In figure: pre-compressed layer 1, weak soil shake fall into stratum 2, base plate 3, side wall 4, top board 5,
Building enclosure 6, backfill earthing 7, pressing plate 8, thin wire 9, anchoring piece 10, cushion 11.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment the invention will be further described.
Embodiment: a kind of weak soil shake as shown in Figures 1 to 8 falls into stratum and prevents ground uneven
The open trench tunnel structure of deformation, including the open cut tunnel being made up of top board 5, base plate 3 and side wall 4
Road, described top board 5 overlaid with backfill earthing 7, the outside of side wall 4 is provided with goes along with sb. to guard him knot
Structure 6.Described base plate 3 and the shake of weak soil below fall into be provided with between stratum 2 multiple horizontally
The pre-compressed layer 1 spliced successively, described pre-compressed layer 1 includes cushion 11, is close to be located at bullet
Property pad 11 end face and the pressing plate 8 of bottom surface and for clamping platen 8 and the fastening of cushion 11
Part, described cushion 11 is prepared by polystyrene material.Described pressing plate 8 is plastic plate or wood
Plate.
Described securing member carries out precommpression by upper and lower two block pressur plates 8 to cushion 11, described
Securing member is the tinsel that can disconnect in corrosion under groundwater effect.Described securing member is by thin wire
9 and anchoring piece 10 form, described thin wire 9 is through pressing plate 8 and cushion 11 and passes through anchor
Firmware 10 is fixed on pressing plate 8, and described thin wire 9 can disconnect in corrosion under groundwater effect.
Described anchoring piece 10, in truncated cone-shaped, described pressing plate 8 has and the anchoring piece 10 in truncated cone-shaped
The through hole matched, anchoring piece 10 is located in through hole, and described thin wire 9 is through anchoring piece 10
And with its secure fit, described anchoring piece 10 near cushion 11 one end diameter less than anchoring
Part 10 is away from one end diameter of cushion 11.
1, fall into the characteristic on stratum 2 according to weak soil shake, after calculating earthquake, weak soil shake falls into 2, stratum
Raw Loess deposits；
2, according to tunnel structure deadweight (base plate 3, side wall 4 and top board 5 conduct oneself with dignity sum), tunnel
In road, the water and soil load etc. on operation phase load, top, tunnel, calculates the pressure bottom the tunnel operation phase
Power；
3, according to the mechanical characteristic of cushion 11 material, the thickness of cushion 11 is calculated with pre-
Decrement；
4, (planar dimension of every fritter can by preliminary dimension, cushion 11 to be divided into some fritters
Use 1m × 1m or bigger), use plank above and below every fritter cushion 11 or mould
Flitch covers, and afterwards, uses thin wire 9 (or thin wire rope) penetrate cushion 11 and open
Bracing wire, makes cushion 11 produce predetermined decrement.
5, construction tunnel building enclosure 6, tunneling foundation ditch, and at tunnel bottom by precompressed
Contracting layer 1 thickness is backbreak, then will make multiple pre-compressed layer 1 and carry out assembly at the bottom of foundation ditch
With laying；
6, construction tunnel structure on cushion 1, and laying backfill is covered above top board 5
Soil 7；
7, during tunnel is runed, subsoil water quickly makes the thin wire 9 in pre-compressed layer 1
Corrosion is ruptured, and cushion 11 i.e. can be operated by predetermined function.
Pre-compressed layer 1 is being arranged at the bottom of tunnel, wherein the thickness of cushion 11 and pre compressed magnitude root
The base pressure of phase, weak soil Loess deposits, the physical mechanics of elastic pad material self is runed according to tunnel
Performances etc. determine.When falling into because of the shake of earthquake generation weak soil, stratum and tunnel floor have disengagement
Trend, the most precompressed cushion 11 can be followed stratum shake and be fallen into and the precommpression of recovered part
Deformation, fills the pore volume of this disengagement, supports tunnel structure, prevents tunnel structure from occurring not
Uniform settlement.
As shown in Figure 2 and Figure 3, making and the installation process of the present invention are as follows:
1, pre-compressed layer 1 carries out fritter cutting, the planar dimension of every fritter by predetermined size
1m × 1m can be used or adjust (Fig. 2) according to Practical Project.
2, it is provided with pressing plate 8 (plank or plastic plate) above and below every piece of pre-compressed layer, adopts
Cushion 11, stretch-draw thin wire (thin wire rope) is penetrated with thin wire 9 (or thin wire rope)
Cushion 1 is made to produce the pre compressed magnitude of design needs and anchor (Fig. 3) by anchoring piece 10.
3, pre-compressed layer 1 completes and transports scene to, by pre-compressed layer 1 in tunnel during installation
The position of the lower section of base plate the most completely spreads, then construction tunnel structure on pre-compressed layer 1
And lay backfill earthing 7.
As shown in Figure 4, Figure 5, the operation principle of the present invention is as follows:
The tunnel operation phase, thin wire 9 is corrosion fracture (Fig. 4) under groundwater erosion effect.
When earthquake, weak soil 2 occurs shake to fall into, pre-compressed layer 1 is followed stratum shake and is fallen into and recovered part
Precommpression deforms, it is therefore prevented that structure generation differential settlement (Fig. 5).
Cushion 11 material in the present invention is recommended to select polystyrene material, but is not limited only to
This material.The reason selecting polystyrene is as follows:
1, polystyrene is a kind of filling material banketed as an alternative, uses in road engineering
Extensively, its performance and durability have obtained the checking of engineering practice；
2, polystyrene is a kind of controllable material, and mechanical stability is preferable；
3, polystyrene is a kind of good elastic-plastic material, its stress-strain characteristics such as Fig. 6
Shown in.The maximum strain of this material can be more than 50%, and elastic strength and maximum yield strength are with material
Expect that density changes, conventional density 20-50kg/m3, and need to carry out laboratory test according to calculating
Determine.
Other material being similar to for good reliability, performance, can also substitute polystyrene conduct
The material of cushion 11.
Compared with prior art, the advantage of the present invention is embodied in:
1, pre-compressed layer 1 is set under open trench tunnel base plate, after the shake of earthquake generation weak soil falls into,
Pre-compressed layer 1 recovers compression by following stratum settlement, and multiple pre-compressed layer 1 can be right
Different weak soil shakes should fall into the Loess deposits on stratum 2 and deformation in various degree occurs, thus support
Tunnel structure, thus reach the purpose preventing tunnel structure from damaging.
2, thin wire 9 can disconnect in corrosion under groundwater effect, and therefore pre-compressed layer 1 is arranged
After Hao, it is not necessary to unnecessary manual operation, time thin wire 9 disconnect, easy construction.
3, pre-compressed layer 1 is made up of cushion 11, pressing plate 8, thin wire 9, anchoring piece 10,
The equal low cost of said modules, easily obtaining, therefore pre-compressed layer 1 is cheap.
The above, be only presently preferred embodiments of the present invention, the not structure to the present invention
Do any pro forma restriction.Above example is made by every technical spirit according to the present invention
Any simple modification, equivalent variations and modification, all still fall within the model of technical scheme
In enclosing.
Claims (6)
1. weak soil shake falls into stratum and prevents an open trench tunnel structure for ground inhomogeneous deformation, bag
Include the open trench tunnel being made up of top board (5), base plate (3) and side wall (4), described top board (5)
Overlaid with backfill earthing (7), the outside of side wall (4) is provided with building enclosure (6),
It is characterized in that: described base plate (3) and the shake of weak soil below fall into and be provided with between stratum (2)
Pre-compressed layer (1), described pre-compressed layer (1) includes cushion (11), is close to be located at elasticity
Pad (11) end face and the pressing plate (8) of bottom surface and for clamping platen (8) and cushion (11)
Securing member, cushion (11) is carried out by upper and lower two block pressur plates (8) by described securing member
Precommpression, described securing member is the tinsel that can disconnect in corrosion under groundwater effect.
Weak soil the most according to claim 1 shake falls into stratum and prevents ground inhomogeneous deformation
Open trench tunnel structure, it is characterised in that: described securing member is by thin wire (9) and anchoring piece (10)
Composition, described thin wire (9) passes pressing plate (8) and cushion (11) and passes through anchoring piece
(10) being fixed on pressing plate (8), described thin wire (9) can be in corrosion under groundwater effect
Disconnect.
Weak soil the most according to claim 2 shake falls into stratum and prevents ground inhomogeneous deformation
Open trench tunnel structure, it is characterised in that: described anchoring piece (10) in truncated cone-shaped, described pressing plate
(8) through hole matched with the anchoring piece (10) in truncated cone-shaped, anchoring piece (10) are had on
Be located in through hole, described thin wire (9) through anchoring piece (10) and with its secure fit,
Described anchoring piece (10) is remote less than anchoring piece (10) near one end diameter of cushion (11)
One end diameter from cushion (11).
Weak soil the most according to claim 1 shake falls into stratum and prevents ground inhomogeneous deformation
Open trench tunnel structure, it is characterised in that: the base plate (3) of described open trench tunnel is with below
Weak soil shake falls into and is provided with multiple pre-compressed layer (1) spliced the most successively between stratum (2).
Weak soil the most according to claim 1 shake falls into stratum and prevents ground inhomogeneous deformation
Open trench tunnel structure, it is characterised in that: described cushion (11) is prepared by polystyrene material.
Weak soil the most according to claim 1 shake falls into stratum and prevents ground inhomogeneous deformation
Open trench tunnel structure, it is characterised in that: described pressing plate (8) is plastic plate or plank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610378068.2A CN105887926B (en) | 2016-05-31 | 2016-05-31 | Weak soil shake, which falls into stratum, prevents the open trench tunnel structure of ground inhomogeneous deformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610378068.2A CN105887926B (en) | 2016-05-31 | 2016-05-31 | Weak soil shake, which falls into stratum, prevents the open trench tunnel structure of ground inhomogeneous deformation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105887926A true CN105887926A (en) | 2016-08-24 |
| CN105887926B CN105887926B (en) | 2018-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610378068.2A Active CN105887926B (en) | 2016-05-31 | 2016-05-31 | Weak soil shake, which falls into stratum, prevents the open trench tunnel structure of ground inhomogeneous deformation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106049540A (en) * | 2016-07-22 | 2016-10-26 | 中铁第四勘察设计院集团有限公司 | Open-cut tunnel structure capable of eliminating expansion force of expansion soil layer |
| CN107740887A (en) * | 2017-10-24 | 2018-02-27 | 佛山科学技术学院 | A kind of anti-hanging structure of offshore oilfield pipeline |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201087426Y (en) * | 2007-07-17 | 2008-07-16 | 广州大学 | Novel effective vibration isolation trench structure |
| CN204530740U (en) * | 2015-02-09 | 2015-08-05 | 中铁十八局集团有限公司 | A kind of large-scale immersed tube tunnel pipeline section shock insulating foundation with elastic deformation |
| CN205776354U (en) * | 2016-05-31 | 2016-12-07 | 中铁第四勘察设计院集团有限公司 | Weak soil shake falls into stratum and prevents the open trench tunnel structure of ground inhomogeneous deformation |
-
2016
- 2016-05-31 CN CN201610378068.2A patent/CN105887926B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201087426Y (en) * | 2007-07-17 | 2008-07-16 | 广州大学 | Novel effective vibration isolation trench structure |
| CN204530740U (en) * | 2015-02-09 | 2015-08-05 | 中铁十八局集团有限公司 | A kind of large-scale immersed tube tunnel pipeline section shock insulating foundation with elastic deformation |
| CN205776354U (en) * | 2016-05-31 | 2016-12-07 | 中铁第四勘察设计院集团有限公司 | Weak soil shake falls into stratum and prevents the open trench tunnel structure of ground inhomogeneous deformation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106049540A (en) * | 2016-07-22 | 2016-10-26 | 中铁第四勘察设计院集团有限公司 | Open-cut tunnel structure capable of eliminating expansion force of expansion soil layer |
| CN107740887A (en) * | 2017-10-24 | 2018-02-27 | 佛山科学技术学院 | A kind of anti-hanging structure of offshore oilfield pipeline |
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| Publication number | Publication date |
|---|---|
| CN105887926B (en) | 2018-04-20 |
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