CN105887926B - Weak soil shake, which falls into stratum, prevents the open trench tunnel structure of ground inhomogeneous deformation - Google Patents
Weak soil shake, which falls into stratum, prevents the open trench tunnel structure of ground inhomogeneous deformation Download PDFInfo
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- CN105887926B CN105887926B CN201610378068.2A CN201610378068A CN105887926B CN 105887926 B CN105887926 B CN 105887926B CN 201610378068 A CN201610378068 A CN 201610378068A CN 105887926 B CN105887926 B CN 105887926B
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- cushion
- stratum
- weak soil
- plate
- open trench
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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
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- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Shaking sunken stratum the invention discloses a kind of weak soil prevents the open trench tunnel structure of ground inhomogeneous deformation, including the open trench tunnel being made of top plate, bottom plate and side wall, backfill earthing is equipped with above the top plate, the outside of side wall is equipped with building enclosure, it is characterised in that：The bottom plate and below weak soil shake fall into stratum between be equipped with pre-compressed layer, the pre-compressed layer includes cushion, is close to arranged on the pressing plate of cushion top and bottom and for clamping platen and the fastener of cushion, the fastener carries out cushion precommpression by upper and lower two block pressur plate, and the fastener is the wire that can be disconnected in corrosion under groundwater effect.The present invention has the shake notch distortion amount for adapting to tunnel bottom different parts different, effectively prevents part from coming to nothing, while simple in structure, easy construction beneficial effect.
Description
Technical field
The present invention relates to open trench tunnel field, is specifically the open cut that a kind of sunken stratum of weak soil shake prevents ground inhomogeneous deformation
Tunnel structure.
Background technology
Weak soil shake falls into weak soil itself and a kind of phenomenon of surface subsidence when being earthquake, is fallen into when shake occurs for open trench tunnel substrate
When, basement strata can be caused to settle, structure is also accordingly produced sedimentation.But due to the shake notch distortion amount of tunnel bottom different parts
Difference, tunnel structure will produce differential settlement, or even cause the phenomenon locally come to nothing between structure and understratum, this
Differential settlement or the additional internal force that structure generation can be made very big that comes to nothing, and then make structure crack or even destroy.Therefore, in engineering
Need to take steps to this Disasters eliminated.
The measure taken at present mainly has two kinds, the first is to be fallen into by stratum improving technology to eliminate shake；It is for second
Supported completely by pile foundation, it is allowed to which structure is disengaged with substrate weak soil after shake is fallen into.Its existing main problem is as follows：
1st, when weak soil is deep and it is widely distributed when, stratum improvement reinforcing engineering amount it is big, it is uneconomical.
2nd, using during pile foundation supporting structure, it is necessary to stake length is big, quantity is more, cause construction investment significantly to increase
Add.
The content of the invention
The purpose of the present invention is to solve the shortcomings of the above background art and to propose one kind to adapt to tunnel bottom not
It is different with the shake notch distortion amount at position, effectively prevent part from coming to nothing, while the shake of simple in structure, easy construction weak soil falls into stratum and prevents
The only open trench tunnel structure of ground inhomogeneous deformation.
In order to realize the above object a kind of weak soil shake provided by the invention falls into stratum and prevents the open cut of ground inhomogeneous deformation
Tunnel structure, including the open trench tunnel being made of top plate, bottom plate and side wall, are equipped with backfill earthing, side above the top plate
The outside of wall is equipped with building enclosure, it is characterised in that：The bottom plate and below weak soil shake fall into stratum between be equipped with precommpression
Layer, the pre-compressed layer include cushion, are close to arranged on the pressing plate of cushion top and bottom and for clamping platen and bullet
Property pad fastener, the fastener carries out cushion by upper and lower two block pressur plate precommpression, and the fastener is can be on ground
The wire that the lower lower corrosion of water effect disconnects.
As the preferred solution of the present invention, the fastener is made of thin wire and anchoring piece, and the thin wire passes through pressure
Plate and cushion are simultaneously fixed on pressing plate by anchoring piece, and the thin wire can be disconnected in corrosion under groundwater effect.
Further, the anchoring piece is in truncated cone-shaped, be provided with the pressing plate with truncated cone-shaped anchoring piece it is matched
Through hole, anchoring piece be arranged on through hole in, the thin wire through anchoring piece and with its immovable fitting, the anchoring piece is close to cushion
One end diameter be less than one end diameter of the anchoring piece away from cushion.
Further, the bottom plate of the open trench tunnel and below weak soil shake fall into stratum between be equipped with it is multiple along level
To the pre-compressed layer spliced successively.
Yet further, the cushion is prepared by polystyrene material.
Also further, the pressing plate is plastic plate or plank.
Since precommpression generates compression the weak soil at tunnel bottom occurs in seismic process for cushion in the present invention
When shake is fallen into, the precompressed compression deformation bounce-back of cushion recovers, it is therefore prevented that the generation of structure differential settlement.Therefore after weak soil shake is fallen into,
Pre-compressed layer is deformed by recovering elastic compression, and the gap that filling weak soil disengages, ensure that the safety of tunnel structure.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention.
Fig. 2 is the structure diagram of cushion.
Fig. 3 is the structure diagram of pre-compressed layer.
Fig. 4 is the structure diagram after the fastener in pre-compressed layer is disconnected by corrosion.
Fig. 5 is that pre-compressed layer shakes the fundamental diagram after sunken stratum generation shake is fallen into weak soil.
Fig. 6 is the stress-strain diagram of polystyrene.
Fig. 7 is the structure diagram 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, bottom plate 3, side wall 4, top plate 5, building enclosure 6, backfill earthing 7, pressure
Plate 8, thin wire 9, anchoring piece 10, cushion 11.
Embodiment
The invention will be further described with reference to the accompanying drawings and embodiments.
Embodiment：A kind of weak soil shake as shown in Figures 1 to 8, which falls into stratum, prevents the open trench tunnel knot of ground inhomogeneous deformation
Structure, including the open trench tunnel being made of top plate 5, bottom plate 3 and side wall 4, the top of the top plate 5 are equipped with backfill earthing 7, side wall
4 outside is equipped with building enclosure 6.The bottom plate 3 and weak soil shake below fall between stratum 2 be equipped with it is multiple horizontally successively
The pre-compressed layer 1 of splicing, the pre-compressed layer 1 include cushion 11, be close to pressing plate 8 arranged on 11 top and bottom of cushion with
And prepared for clamping platen 8 and the fastener of cushion 11, the cushion 11 by polystyrene material.The pressing plate 8 is
Plastic plate or plank.
The fastener carries out precommpression by upper and lower two block pressur plate 8 to cushion 11, and the fastener is can be in underground
The wire that the lower corrosion of water effect disconnects.The fastener is made of thin wire 9 and anchoring piece 10, and the thin wire 9 passes through pressure
Plate 8 and cushion 11 are simultaneously fixed on pressing plate 8 by anchoring piece 10, and the thin wire 9 can be disconnected in corrosion under groundwater effect.
The anchoring piece 10 is in truncated cone-shaped, is provided with the pressing plate 8 and the 10 matched through hole of anchoring piece in truncated cone-shaped, anchoring piece 10
In through hole, the thin wire 9 through anchoring piece 10 and with its immovable fitting, the anchoring piece 10 is close to the one of cushion 11
End diameter is less than one end diameter of the anchoring piece 10 away from cushion 11.
1st, the characteristic for falling into stratum 2 is shaken according to weak soil, weak soil shakes the Loess deposits that sunken stratum 2 occurs after calculating earthquake；
2nd, conducted oneself with dignity (the sum of bottom plate 3, side wall 4 and the dead weight of top plate 5) according to tunnel structure, operation phase load, tunnel in tunnel
The water and soil load on top etc., calculates the pressure of tunnel operation phase bottom；
3rd, according to the mechanical characteristic of 11 material of cushion, the thickness and pre compressed magnitude of calculating cushion 11；
4th, cushion 11 is divided into some fritters by preliminary dimension (planar dimension per fritter can uses 1m × 1m or more
Greatly), per fritter cushion 11 above and below covered using plank or plastic plate, afterwards, using (or the thin wire of thin wire 9
Rope) cushion 11 and tensioning iron wire are penetrated, cushion 11 is produced predetermined decrement.
5th, construction tunnel building enclosure 6, tunneling foundation pit, and backbreak in tunnel bottom by 1 thickness of pre-compressed layer,
A lot of pre-compressed layer 1 will be made again to carry out assembled and be laid with foundation pit bottom；
6th, the construction tunnel structure on cushion 1, and backfill earthing 7 is laid with the top of top plate 5；
7th, during tunnel operation, underground water is quickly broken 9 corrosion of thin wire in pre-compressed layer 1, cushion 11
It can work by predetermined function.
Pre-compressed layer 1 is set at tunnel bottom, and wherein the thickness of cushion 11 and pre compressed magnitude run the bottom of phase according to tunnel
Portion's pressure, weak soil Loess deposits, the physical and mechanical property etc. of elastic pad material itself determine.Fallen into when because weak soil shake occurs for earthquake
When, stratum has the trend of disengagement with tunnel floor, and precompressed cushion 11 can follow stratum shake and fall into and recovered part at this time
Precompressed compression deformation, fills the pore volume of the disengagement, supports tunnel structure, prevents tunnel structure from differential settlement occurs.
As shown in Figure 2 and Figure 3, making of the invention and installation process are as follows：
1st, pre-compressed layer 1 carries out fritter cutting by predetermined size, and the planar dimension per fritter can use 1m × 1m or root
Adjusted (Fig. 2) according to Practical Project.
2nd, pressing plate 8 (plank or plastic plate) is equipped with above and below every piece of pre-compressed layer, using (or the thin iron of thin wire 9
Silk rope) cushion 11 is penetrated, tensioning thin wire (thin wire rope) makes cushion 1 produce the pre compressed magnitude of design needs and passes through anchor
Firmware 10 anchors (Fig. 3).
3rd, pre-compressed layer 1, which completes, transports scene to, by pre-compressed layer 1 on the position edge of the lower section of tunnel floor during installation
Horizontal direction is completely spread, then on pre-compressed layer 1 construction tunnel structure and be laid with backfill earthing 7.
As shown in Figure 4, Figure 5, operation principle of the invention is as follows：
Tunnel is runed the phase, the corrosion fracture (Fig. 4) under groundwater erosion effect of thin wire 9.When earthquake, weak soil 2 shakes
When falling into, pre-compressed layer 1 is followed stratum shake and is fallen into and the precompressed compression deformation of recovered part, it is therefore prevented that differential settlement (figure occurs for structure
5)。
11 material of cushion in the present invention is recommended to select polystyrene material, but is not limited only to the material.Select polyphenyl
The reasons why ethene, is as follows：
1st, polystyrene is a kind of as the filling material that bankets of replacement, in road engineering using extensive, its performance and resistance to
Long property has obtained the verification of engineering practice；
2nd, polystyrene is a kind of controllable material, and mechanical stability is preferable；
3rd, polystyrene is a kind of good elastic-plastic material, its stress-strain characteristics is as shown in Figure 6.The maximum of the material
Strain can be more than 50%, and elastic strength and maximum yield strength change with density of material, commonly uses density 20-50kg/m3, and root
Progress laboratory test is needed to determine according to calculating.
For the similar other materials of good reliability, performance, material of the polystyrene as cushion 11 can also be substituted.
Compared with prior art, advantage of the invention is embodied in：
The 1st, pre-compressed layer 1 is set under open trench tunnel bottom plate, after weak soil shake, which occurs, for earthquake falls into, pre-compressed layer 1 is by chasing after
Recover compression with stratum settlement, multiple pre-compressed layers 1 can correspond to different weak soil shakes and fall into the Loess deposits on stratum 2 and occur not
With the deformation of degree, so that tunnel structure is supported, so as to achieve the purpose that to prevent tunnel structure from damaging.
2nd, after thin wire 9 can be disconnected in corrosion under groundwater effect, therefore pre-compressed layer 1 is set, without unnecessary artificial
Operation, you can when thin wire 9 disconnect, easy construction.
3rd, pre-compressed layer 1 is made of cushion 11, pressing plate 8, thin wire 9, anchoring piece 10, and the equal cost of said modules is low, easy
Obtain, therefore pre-compressed layer 1 is cheap.
The above described is only a preferred embodiment of the present invention, not the structure of the present invention is done in any form
Limitation.Any simple modification, equivalent change and modification that every technical spirit according to the present invention makees above example,
In the range of still falling within technical scheme.
Claims (5)
1. a kind of weak soil shake, which falls into stratum, prevents the open trench tunnel structure of ground inhomogeneous deformation, including by top plate（5）, bottom plate（3）
And side wall（4）The open trench tunnel of composition, the top plate（5）Top be equipped with backfill earthing（7）, side wall（4）Outside be equipped with
Building enclosure（6）, it is characterised in that：The bottom plate（3）Stratum is fallen into weak soil shake below（2）Between be equipped with pre-compressed layer
（1）, the pre-compressed layer（1）Including cushion（11）, be close to be arranged on cushion（11）The pressing plate of top and bottom（8）And use
In clamping platen（8）And cushion（11）Fastener, the fastener passes through upper and lower two block pressur plate（8）To cushion（11）Into
Row precommpression, the fastener are the wire that can be disconnected in corrosion under groundwater effect；The fastener is by thin wire（9）With
Anchoring piece（10）Composition, the thin wire（9）Through pressing plate（8）And cushion（11）And pass through anchoring piece（10）It is fixed on pressing plate
（8）On, the thin wire（9）It can be disconnected in corrosion under groundwater effect.
2. weak soil shake according to claim 1, which falls into stratum, prevents the open trench tunnel structure of ground inhomogeneous deformation, its feature
It is：The anchoring piece（10）In truncated cone-shaped, the pressing plate（8）On be provided with truncated cone-shaped anchoring piece（10）It is matched logical
Hole, anchoring piece（10）In through hole, the thin wire（9）Through anchoring piece（10）And with its immovable fitting, the anchoring piece
（10）Close to cushion（11）One end diameter be less than anchoring piece（10）Away from cushion（11）One end diameter.
3. weak soil shake according to claim 1, which falls into stratum, prevents the open trench tunnel structure of ground inhomogeneous deformation, its feature
It is：The bottom plate of the open trench tunnel（3）Stratum is fallen into weak soil shake below（2）Between be equipped with and multiple horizontally spell successively
The pre-compressed layer connect（1）.
4. weak soil shake according to claim 1, which falls into stratum, prevents the open trench tunnel structure of ground inhomogeneous deformation, its feature
It is：The cushion（11）Prepared by polystyrene material.
5. weak soil shake according to claim 1, which falls into stratum, prevents the open trench tunnel structure of ground inhomogeneous deformation, its feature
It is：The pressing plate（8）For 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 CN105887926A (en) | 2016-08-24 |
| CN105887926B true 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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Families Citing this family (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 |
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| CN105887926A (en) | 2016-08-24 |
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