CN103669338A - Novel slide-resistant pile structure superior in seismic performance and implement method thereof - Google Patents
Novel slide-resistant pile structure superior in seismic performance and implement method thereof Download PDFInfo
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- CN103669338A CN103669338A CN201310670182.9A CN201310670182A CN103669338A CN 103669338 A CN103669338 A CN 103669338A CN 201310670182 A CN201310670182 A CN 201310670182A CN 103669338 A CN103669338 A CN 103669338A
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Abstract
The invention relates to a novel slide-resistant pile structure superior in seismic performance and an implement method of novel slide-resistant pile structures superior in seismic performance. The novel slide-resistant pile structure is composed of a reinforced concrete slide-resistant pile body, reinforced concrete retaining walls and an EPS filling layer. The implement method of the novel slide-resistant pile structures comprises the steps that pile pits of reinforced concrete slide-resistant pile bodies are excavated one by one, the retaining wall is arranged timely when one pile pit is excavated until the pile pit is excavated to the designed elevation, pre-cast blocks of the EPS filling layers are upwards installed one by one to the elevation of the pile top from the elevation of each pile pit bottom, and reinforcement cage binding and concrete pouring and maintenance are carried out on the reinforced concrete slide-resistant pile bodies. The novel slide-resistant pile structure superior in seismic performance and the implement method of the novel slide-resistant pile structures superior in seismic performance have the advantages that the pre-cast blocks of the EPS filling layers are low in price, can be produced in a standardization mode and are convenient to assemble on site. The novel slide-resistant pile structure is an organic whole combining rigidness with softness, not only can the requirement for resisting landslide thrust be met, but also the good energy dissipation function under the earthquake working condition can be achieved, and then the seismic performance of the structure is improved.
Description
Technical field
The present invention is mainly a kind of structure and the implementation method thereof of inventing for improving the anti-seismic performance of stabilizing piles, especially can be applicable to the area that engineering that seismic fortification intensity is higher and geological disaster take place frequently.
Background technology
At present, crustal movement is in active period, and China is a country that geological disaster takes place frequently, there is in recent years repeatedly great earthquake, and as Wenchuan County in Sichuan (2008), Yushu district, Qinghai (2010), Yaan, Sichuan (2013) and Minxian County, Gansu Zhang County earthquake (2013) etc., given the people's life and property and bring huge loss.Antislide pile be a kind of in administering geological disaster conventional engineering means, be widely used in the engineering fields such as railway, highway, water conservancy, and the anti-seismic problem of this rigid structures also more and more causes engineer's attention, domestic existing expert, scholar propose can not emphasize simply " antidetonation " in engineering, reinforcement is simply reinforced and is contended with natural force, so often causes the generation of accident.There are many engineering experiences to prove, under earthquake operating mode, the retaining structure that comprises flexible material, obviously superior without its anti-seismic performance of retaining structure of flexible material, especially after macroseism, there is the structure of flexible material still can bring into play its effect.So the anti-seismic performance that adds flexible material to improve engineering in engineering has caused the attention of engineering circles.
EPS material has been widely used in, in bridges and culverts engineering, subgrade construction and Retaining Wall Engineering, using EPS material yet there are no in stabilizing piles at present.Have scholar to find by shaking " Invest, Then Investigate ", these have adopted its anti-seismic performance of engineering of EPS material obviously better.EPS material is mainly used in replacing banketing as applying filler in engineering, and this material has following feature can become the reason that is preferentially selected to engineering:
(1) unit weight is little.The unit weight of EPS material is generally at 10～50kg/m
3scope, when this feature makes it as filler, can not increase the soil pressure of the retaining structure wall back of the body, make retaining structure more economically;
(2) there is certain intensity.The intensity of EPS material is at least more than 50kP, and this just can guarantee that this material itself can not destroy under larger load;
(3) good compression property.EPS material modulus of compressibility is little, has very large permission deflection, has good restorability under earthquake and impact load, is applied to the generation that engineering can effectively reduce secondary disaster;
(4) water-fast, corrosion-resistant.The problem of water is extensively present in Foundation Design, EPS material has good water resistance can meet in engineering retaining structure material not by the requirement of aqueous corrosion, and there is scholar to pass through 21 kinds of physics, chemistry, the verification experimental verification of biological substance to the effect of EPS material, only have gasoline, diesel oil and vegetable oil to have slight effect to it, so this characteristic of EPS can be widely used in Foundation Design;
(5) be difficult for aging.Most of Foundation Designs belong to permanent work, and this just requires the use that retaining structure material can be permanent, and EPS material adapts to this requirement;
(6) easy construction.EPS material is easy to moulding, and its prefabricated section quality is light, convenient carrying.Difficulty of construction is little;
(7) Computing Principle is simple.EPS material belongs to uniform dielectric, can process according to linear elastic materials when calculating in its strength range.
Stabilizing piles is widely used in landslide control engineering, it can be adapted to resist Thrust of Landslide with the large feature of its rigidity as a kind of reinforced concrete structure, but under earthquake operating mode, be subject to Earthquake Inertia Force Acting effect, pile body self effect of energy dissipation is not obvious causes pile body damage itself large; And EPS material has sufficient flexibility, under Earthquake Inertia Force Acting effect, there is good effect of energy dissipation.The present invention combines reinforced concrete structure and these two kinds firm, soft materials of EPS, not only can meet the requirement of opposing Thrust of Landslide, and can improve the anti-seismic performance of structure, in the higher area of seismic fortification intensity, has wide practical prospect.
Summary of the invention
For the higher landslide control engineering of seismic fortification intensity, the present invention has developed superior novel anti-slide pile structure and the implementation method thereof of a kind of anti-seismic performance that firm, soft material is combined.By backer's side after reinforced concrete anti-slide pile stake, fill the EPS material of the certain compactness of one deck, the flexibility of whole pile body is increased, in seismic process, can effectively absorb seismic wave energy, thereby improve its shock resistance.
The present invention is realized by following scheme: a kind of novel anti-slide pile structure that improves anti-seismic performance, comprises that reinforced concrete pile body, EPS fill layer and retaining wall.The length of antislide pile and sectional dimension can calculate according to engineering actual conditions, and pile ditch excavation size will be considered the size of pile body itself and the space size of EPS material.During construction, first carrying out the stake hole of reinforced concrete anti-slide pile pile body excavates section by section, every excavation one joint, just apply in time this joint retaining wall, until pile ditch excavation follows closely and has applied to design elevation and retaining wall, then from the end, stake hole, upwards carry out section by section installation that EPS fills layer prefabricated section from bottom to top until reinforcing cage colligation, concreting and the maintenance of reinforced concrete anti-slide pile pile body are finally carried out in stake top.
Technique effect of the present invention is: this structure is the organic whole of just-soft combination, and reinforced concrete anti-slide pile pile body belongs to rigid structures, for resisting Thrust of Landslide; Retaining wall belongs to safeguard structure, guarantees the safety of construction period stake hole operation; EPS fills layer and belongs to flexible material, the inertia force producing when absorbing seismic wave energy and reducing earthquake.Therefore this structure can play good energy dissipating effect under earthquake operating mode, has increased the security performance of stabilizing piles under Earthquake Inertia Force Acting effect.
Advantage of the present invention is: be first that EPS material price is cheap, little on construction costs impact, next is that existing common antislide pile construction technology is ripe, and the EPS that the present invention sets up fills a layer prefabricated section, can carry out standardized production according to designing requirement, its Assembling also can complete in stake hole, and assembled and bonding from bottom to top, therefore construction is convenient.
Accompanying drawing content
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is antislide pile layout schematic diagram of the present invention;
Fig. 2 is antislide pile of the present invention vertical section schematic diagram;
Fig. 3 is antislide pile schematic cross section of the present invention;
Fig. 4 is antislide pile retaining wall arrangement of reinforcement schematic diagram of the present invention;
Fig. 5 is the prefabricated prefabricated section structural representation of antislide pile EPS of the present invention, wherein (a): front view, (b): lateral view, (c): top view.
In figure: 1. reinforced concrete anti-slide pile pile body, 2. steel concrete retaining wall, 3.EPS fills layer, 4. landslide boundary, 5. main sliding direction of landslide, 6. retaining wall top reserved steel bar, the 7. main muscle of retaining wall and stirrup, 8.EPS prefabricated section reserved steel bar hole.
The specific embodiment
With reference to the accompanying drawings the specific implementation method of novel antislide pile is described further:
(1) preparation of construction.The same with general stabilizing piles, by engine request, to get the raw materials ready, selected material, model will meet designing requirement;
(2) pile ditch excavation.Pile ditch excavation be take hand excavation as main, and adopts compartment excavation, and aperture is done fore shaft and processed, and pile body is done retaining wall and processed, and stake hole size should comprise that EPS fills the space of layer;
(3) groundwater treatment.Tap internal water accumulation in time in pile ditch excavation process, can adopt in hole directly draining and a stake outer tube pump to fall draining;
(4) retaining wall is made.In pile ditch excavation process, should carry out in time steel concrete retaining wall applies.Retaining wall height is generally 1～1.Sm, with reference to the accompanying drawings shown in 4, while making retaining wall, on every joint retaining wall top, inwardly stretch out 2 reinforcing bars, be used for connecting the prefabricated prefabricated section of EPS, the length of retaining wall top reserved steel bar by EPS fill layer thickness determine, the retaining wall having applied should guarantee that its inwall is vertical, smooth;
(5) EPS fills production and the installation of layer.EPS fills layer prefabricated section should adopt standardized production, its prefabricated section thickness is not less than 50cm, height is advisable with 2～5m, can be according to design document requirement, according to the position of reserved steel bar on every joint retaining wall, EPS prefabricated section relevant position reserving hole (or boring pore-creating hole according to actual conditions at the scene).Complete after pile ditch excavation and retaining wall apply, certainly cheat end absolute altitude and upwards carry out section by section installation that EPS fills layer prefabricated section until stake top mark is high.The combination that EPS fills layer prefabricated section and retaining wall is that retaining wall top reserved steel bar is inserted in the preformed hole on EPS prefabricated section, and EPS prefabricated section and retaining wall is carried out bonding with cementing agent, guarantees that itself and retaining wall combine closely.The combination that EPS fills between layer prefabricated section is by polymer adhesive, and avoids EPS prefabricated section contact surface and retaining wall joint in same elevation.
(6) making of reinforcing cage and installation.The making of reinforcing cage can be carried out outside hole, also can in hole, carry out;
(7) concreting and maintenance.Pile concrete is built and should be carried out continuously, does not stay constuction joint, while often building 0.5～0.7m, should insert vibrator vibration compacting once, completes after antislide pile construction, be carried out in accordance with regulations concrete maintenance to the antislide pile of crop out.
Claims (5)
1. superior novel anti-slide pile structure and the implementation method thereof of anti-seismic performance, is characterized in that: described anti-slide pile structure comprises that reinforced concrete anti-slide pile pile body (1), steel concrete retaining wall (2), EPS fill (3) three part of layer; The implementation method of described anti-slide pile structure is the stake hole of excavating first section by section reinforced concrete anti-slide pile pile body (1), the complete joint of every excavation, just apply in time this joint retaining wall (2), until design elevation and retaining wall follow closely and have applied at the bottom of being excavated to, then backer's side in the stake hole forming at retaining wall (2), from bottom, stake hole, carry out section by section EPS from bottom to top and fill the installation of layer (3) prefabricated section, finally carry out reinforcing cage colligation, concreting and maintenance.
2. superior novel anti-slide pile structure and the implementation method thereof of anti-seismic performance according to claim 1, it is characterized in that: described anti-slide pile structure is the organic whole of just-soft combination, reinforced concrete anti-slide pile pile body (1) belongs to rigid material, for resisting Thrust of Landslide; Steel concrete retaining wall (2) belongs to safeguard structure, guarantees construction period stake hole job safety; EPS fills layer (3) and belongs to flexible material, the inertia force producing when absorbing seismic wave energy and reducing earthquake.
3. superior novel anti-slide pile structure and the implementation method thereof of anti-seismic performance according to claim 1, it is characterized in that: the EPS applying in backer's side of anti-slide pile structure fills layer (3), by prefabricated section, installed and formed, the thickness of prefabricated section is not less than 50cm, and its height is advisable with 3～5m.
4. superior novel anti-slide pile structure and the implementation method thereof of anti-seismic performance according to claim 1, it is characterized in that: the combination that EPS fills layer (3) prefabricated section and retaining wall (2) is that every joint retaining wall (2) top arranges two reserved steel bars (6), during installation, reserved steel bar (6) is inserted in the preformed hole (8) on EPS prefabricated section, and by prefabricated section and retaining wall polymer adhesive.
5. superior novel anti-slide pile structure and the implementation method thereof of anti-seismic performance according to claim 1, it is characterized in that: EPS fills between layer (3) prefabricated section and passes through polymer adhesive, and avoids EPS prefabricated section contact surface and retaining wall (2) joint in same elevation.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104389307A (en) * | 2014-12-08 | 2015-03-04 | 中铁西北科学研究院有限公司勘察设计分公司 | Self-resetting slide-resistant pile structure with energy consumption function and implementation method thereof |
| CN106522270A (en) * | 2016-12-28 | 2017-03-22 | 华中科技大学 | Pile foundation and retaining wall anti-earthquake retaining structure comprising EPS buffer layers and construction method |
| CN107489156A (en) * | 2017-07-28 | 2017-12-19 | 重庆交通大学 | Allow cut and allow die mould anchorage pile structure and its construction method |
| CN109235465A (en) * | 2018-09-20 | 2019-01-18 | 中铁二院工程集团有限责任公司 | Squeeze into the superpower concrete tubular pile breast wall type packaged combination anti-slide pile structure of prestressing force |
| CN109972669A (en) * | 2019-04-29 | 2019-07-05 | 广州市泰宇科技发展有限公司 | A kind of shock-isolating pile made of fine and the vibration isolation campshed using it |
| CN111501797A (en) * | 2020-05-06 | 2020-08-07 | 中铁二院工程集团有限责任公司 | Anti-skidding structure for reducing deformation of structures on landslide |
| CN111809537A (en) * | 2020-07-22 | 2020-10-23 | 中国科学院、水利部成都山地灾害与环境研究所 | Collapse landslide blocking energy dissipation pile array and design method thereof |
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| CN109972669A (en) * | 2019-04-29 | 2019-07-05 | 广州市泰宇科技发展有限公司 | A kind of shock-isolating pile made of fine and the vibration isolation campshed using it |
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| CN111501797A (en) * | 2020-05-06 | 2020-08-07 | 中铁二院工程集团有限责任公司 | Anti-skidding structure for reducing deformation of structures on landslide |
| CN111809537A (en) * | 2020-07-22 | 2020-10-23 | 中国科学院、水利部成都山地灾害与环境研究所 | Collapse landslide blocking energy dissipation pile array and design method thereof |
| CN111809537B (en) * | 2020-07-22 | 2021-12-07 | 中国科学院、水利部成都山地灾害与环境研究所 | Design method of collapse landslide blocking energy dissipation pile array |
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