CN112227340B - Pile-supported reinforced embankment based on waste tires and working method thereof - Google Patents
Pile-supported reinforced embankment based on waste tires and working method thereof Download PDFInfo
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- CN112227340B CN112227340B CN202011145414.5A CN202011145414A CN112227340B CN 112227340 B CN112227340 B CN 112227340B CN 202011145414 A CN202011145414 A CN 202011145414A CN 112227340 B CN112227340 B CN 112227340B
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- 239000010920 waste tyre Substances 0.000 title claims abstract description 140
- 238000000034 method Methods 0.000 title claims description 10
- 230000002787 reinforcement Effects 0.000 claims abstract description 39
- 239000002689 soil Substances 0.000 claims abstract description 24
- 239000000945 filler Substances 0.000 claims abstract description 22
- 239000004567 concrete Substances 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims description 24
- 230000003014 reinforcing effect Effects 0.000 claims description 15
- 210000003205 muscle Anatomy 0.000 claims description 8
- 238000005728 strengthening Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 239000011449 brick Substances 0.000 claims description 2
- 239000002893 slag Substances 0.000 claims description 2
- 239000004566 building material Substances 0.000 claims 3
- 238000010276 construction Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 11
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000035699 permeability Effects 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 description 7
- 239000002131 composite material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a pile-supported reinforced embankment based on waste tires, which comprises a plurality of rigid piles, wherein the lower end of each rigid pile is inserted into a soft soil foundation, the upper end of each rigid pile is nested with a lower waste tire, the lower end of each lower waste tire wraps the side wall of each rigid pile, the upper end of each lower waste tire is stacked with an upper waste tire, concrete is poured into the upper waste tire and the lower waste tire, so that the upper waste tire, the lower waste tire and the rigid piles are fixedly connected into a whole, a drainage filler is arranged between the upper waste tire and the lower waste tire on the adjacent rigid piles, and a mixed filler is paved above the upper waste tire. The invention is beneficial to quickly forming the pile-soil settlement difference in the area near the pile top under the action of overlying load, further quickly exerting the soil arch effect and the reinforcement effect, quickly exerting the high bearing characteristic of the rigid pile, having good water permeability of the roadbed, facilitating the dissipation of hyperstatic pore water pressure during construction and being beneficial to the stability of the foundation during construction.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering foundation treatment, and particularly relates to a pile-supported reinforced embankment based on waste tires and a working method thereof.
Background
Whether waste treatment is appropriate or not is related to whether the society can develop sustainably, and is a key ring in the field of environmental protection. The waste tires are called black pollution, the yield is huge in China and is increased year by year, and the problem of environmental pollution is more and more serious. The conventional waste tire treatment method comprises incineration, renovation, secondary treatment and recycling, but the overall utilization rate is still lower and the environmental protection pressure is high compared with the yield of the waste tires.
The pile-supported reinforced embankment is widely used for soft soil foundation treatment engineering along the railway and the highway. Pile-soil differential settlement in the area near the pile top is an important premise that the pile-supported reinforced embankment plays a role in 'soil arch effect' and 'reinforcement effect', however, the drainage and consolidation of a soft soil foundation are slow, and sufficient pile-soil differential settlement cannot be rapidly generated after embankment stacking, and the pile-supported reinforced embankment has the following defects: (1) the utilization rate of the bearing capacity of the rigid pile at the initial stage of embankment filling is low, and the embankment filling construction period is long; (2) the differential settlement total amount of the pile soil is smaller, the soil arch effect and the reinforcement effect are not fully exerted, and the high bearing property of the rigid pile is not fully exerted.
Disclosure of Invention
The invention aims to solve the technical problem of providing a pile-supported reinforced embankment based on waste tires aiming at the defects of the prior art.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a pile-supported adds muscle embankment based on junked tire, wherein: including a plurality of rigidity stake, every rigidity stake lower extreme all inserts in the soft soil foundation, rigidity stake upper end nestification has junked tire down, junked tire lower extreme parcel rigidity stake's lateral wall down, junked tire upper end stacks up junked tire down, it has pour the concrete with junked tire inside down to go up junked tire, makes last junked tire, junked tire and rigidity stake link firmly integratively down, is provided with the drainage filler between last junked tire on the adjacent rigidity stake and the junked tire down, go up junked tire top and laid mixed filler.
In order to optimize the technical scheme, the specific measures adopted further comprise:
furthermore, geotechnical reinforcements are arranged above the lower waste tire and the upper waste tire, the geotechnical reinforcements on the lower waste tire are fixedly connected with the rigid piles, the lower waste tire and the upper waste tire, and the geotechnical reinforcements on the upper waste tire are fixedly connected with the upper waste tire.
Further, go up the junked tire and be provided with the strengthening rib in the junked tire down, the strengthening rib is with the mutual restraint location of geotechnological reinforcement, and as an organic whole with concrete placement, the strengthening rib includes that a plurality of hoop stirrup not of uniform size and above junked tire are radial vertical muscle as the centre of a circle, the equidistant from top to bottom distribution of hoop stirrup has been laid in last junked tire and the space that junked tire down constitutes in the hoop stirrup horizontal plane that lies in last junked tire and has been put and indulge the muscle, and this hoop stirrup is from last to arranging into the round platform form to the end down, and adjacent hoop stirrup passes through the splice bar to be connected fixedly.
Furthermore, the drainage filler is flexible rubber particles, and the average particle size is 10-30 mm.
Further, the mixed filler is a mixture of construction waste and waste tire rubber particles, the mass mixing ratio of the construction waste to the rubber particles is 5: 1-10: 1, the construction crushed materials are slag, concrete blocks, crushed stone blocks, brick and tile crushed blocks or mortar, and the non-uniformity coefficient C of the mixed filleruNot less than 5, coefficient of curvature Cc＝1～3。
Further, the inner diameter of the lower waste tire is 10-30cm larger than the outer diameter of the rigid pile, and the outer diameter of the upper waste tire is 10-40cm larger than the outer diameter of the lower waste tire and smaller than the pile spacing.
Further, the top surface of the lower waste tire is flush with the top surface of the rigid pile.
A working method of a pile-supported reinforced embankment based on waste tires comprises the following steps:
the method comprises the following steps: inserting a rigid pile into the soft soil foundation to enable the pile head at the upper end of the rigid pile to be higher than the thickness of a lower waste tire on the surface of the soft soil foundation;
step two: sleeving a lower waste tire on a rigid pile, placing reinforcing ribs in the lower waste tire, and then pouring concrete in the inner space of the lower waste tire, wherein the reinforcing ribs are arranged in a space manner and are in an inclined upward divergence shape;
step three: filling rubber particles between the lower waste tires of the adjacent rigid piles, so that the height of a filled filling area is flush with the upper surfaces of the lower waste tires;
step four: laying geotechnical reinforcement on the upper surface of the lower waste tire, wherein longitudinal ribs in the reinforcing ribs penetrate the geotechnical reinforcement and are mutually constrained and positioned;
step five: arranging the upper waste tire right above the lower waste tire, and pouring concrete after the upper part of the reinforcing rib penetrates into the inner space of the upper waste tire;
step six: filling rubber particles between adjacent upper waste tires to enable the height of the filling area to be flush with the upper surfaces of the upper waste tires;
step seven: and laying geotechnical reinforcement on the upper surface of the upper waste tire, fixedly connecting the geotechnical reinforcement with the upper waste tire, and laying mixed filler above the geotechnical reinforcement to form the roadbed.
The invention has the beneficial effects that:
1. the pile-supported reinforced embankment using waste tires and construction waste is beneficial to the exertion of soil arch effect and reinforced effect: (1) the pile top adopts an inverted ladder type two-layer waste tire-building garbage concrete pile cap form, so that the thickness and the top area of the pile cap are increased, and the replacement rate of the composite foundation pile cap is increased; meanwhile, a reinforcing steel bar reinforcing structure is added in the pile cap, so that the anti-impact and anti-shearing capacity of the pile cap is enhanced; (2) the space between the piles in the thickness range of the waste tire pile cap is completely filled with flexible rubber particles, so that the pile-soil settlement difference can be formed in the area near the pile top under the action of the covering load, the soil arch effect and the reinforcement effect can be exerted quickly, and the high bearing characteristic of the rigid pile can be exerted quickly; (3) the top surface of the soft soil foundation adopts a mode of clamping geotechnical reinforcement by two layers of tires, the settlement difference between a rigid pile cap and flexible rubber particle filling is obvious, and the performance of the reinforcement effect is further stimulated by combining double-layer geotechnical reinforcement; (4) the bottom geotechnical reinforcement is embedded between the two layers of tires and is firmly fixed by concrete and steel bars in the pile cap, so that the tangential tension of the pile cap can be fully exerted; meanwhile, the edge of the lower waste tire is arc-shaped, so that the phenomenon that the geotechnical reinforcement is damaged due to local stress concentration at the edge of the pile cap can be avoided.
2. The embankment of the combined structure of matching the construction waste and the waste tire rubber particles is 50-80% of the traditional embankment, the additional stress to the composite foundation is small, and the load sharing efficiency of the pile bearing type embankment structural pile is high, so that the total settlement of the foundation and the settlement after construction are obviously reduced.
3. The waste tire is used as a template when the pile cap is poured, and provides circumferential restraint for enhancing the overall strength of the tire pile cap.
4. The subgrade has good water permeability, is convenient for dissipation of hyperstatic pore water pressure during construction, and is beneficial to stabilization of the foundation during construction.
Drawings
Fig. 1 is a detailed cross-sectional view of a pile-supported reinforced embankment using waste tires and construction waste according to the present invention;
FIG. 2 is a plan view of the composite ground based tire cap arrangement of the present invention;
FIG. 3 is a top view of the upper scrap tire cap of the present invention;
fig. 4 is a top view of the lower waste tire cap of the present invention.
The reference signs are: the concrete foundation comprises a rigid pile 1, a soft soil foundation 2, a geotechnical reinforcement 3, a mixed filler 4, a lower waste tire 5, an upper waste tire 6, concrete 7, rubber particles 8, hoop reinforcements 9, longitudinal reinforcements 10 and connecting reinforcements 11.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, the invention relates to a pile-supported reinforced embankment based on waste tires, which comprises a plurality of rigid piles 1, wherein the lower end of each rigid pile 1 is inserted into a soft soil foundation 2, the upper end of each rigid pile 1 is nested with a lower waste tire 5, the lower end of each lower waste tire 5 wraps the side wall of the corresponding rigid pile 1, the top surface of each lower waste tire 5 is flush with the top surface of the corresponding rigid pile 1, the upper end of each lower waste tire 5 is stacked with an upper waste tire 6, and concrete is poured into the upper waste tire 6 and the lower waste tire 5, so that the upper waste tire 6, the lower waste tire 5 and the rigid piles 1 are fixedly connected into a whole.
Wherein, the inner diameter of the lower waste tire 5 is 10-30cm larger than the outer diameter of the rigid pile 1, and the outer diameter of the upper waste tire 6 is 10-40cm larger than the outer diameter of the lower waste tire 5 and smaller than the pile spacing.
The geotechnical reinforcement 3 is arranged above the lower waste tire 5 and the upper waste tire 6, the geotechnical reinforcement 3 on the lower waste tire 5 is fixedly connected with the rigid pile 1, the lower waste tire 5 and the upper waste tire 6, and the geotechnical reinforcement 3 on the upper waste tire 6 is fixedly connected with the upper waste tire 6.
Go up simultaneously and be provided with the strengthening rib in junked tire 6 and junked tire 5 down, strengthening rib and geotechnological reinforcement 3 mutual restraint location, and pour as an organic wholely with concrete 7, the strengthening rib includes that a plurality of hoop stirrup 9 not of uniform size and above junked tire are radial vertical muscle 11 as the centre of a circle, hoop stirrup 9 is equidistant distributes from top to bottom in the space of forming at last junked tire 6 and junked tire 5 down, and the hoop stirrup 9 level that is located in junked tire 6 distributes and is provided with vertical muscle 10 in, and this hoop stirrup 9 is from last to arranging into the round platform form down by big to little, and adjacent hoop stirrup 9 is connected fixedly through connecting rib 11.
And a drainage filler is arranged between the upper waste tire 6 and the lower waste tire 5 on the adjacent rigid piles 1, the drainage filler is flexible rubber particles 8, the rubber particles 8 are prepared by mechanically crushing waste tires, and the average particle size is 10-30 mm.
Mixed filler 4 is laid above the upper waste tire 6, the mixed filler 4 is a mixture of building crushed aggregates and waste tire rubber particles, the mass mixing ratio of the building crushed aggregates to the rubber particles is 5: 1-10: 1, and the building crushed aggregates are muck, concrete blocks, crushed stone blocks and bricksTile fragment or mortar, mixed filler non-uniformity coefficient C after configurationuNot less than 5, coefficient of curvature CcThe compression modulus, cohesive force and friction angle of the mixed filler are required to meet the design requirements of embankment filling.
A working method of a pile-supported reinforced embankment based on waste tires comprises the following steps:
the method comprises the following steps: inserting a rigid pile into the soft soil foundation to enable the pile head at the upper end of the rigid pile to be higher than the thickness of a lower waste tire on the surface of the soft soil foundation;
step two: sleeving a lower waste tire on a rigid pile, placing reinforcing ribs in the lower waste tire, and then pouring concrete in the inner space of the lower waste tire, wherein the reinforcing ribs are arranged in a space manner and are in an inclined upward divergence shape;
step three: filling rubber particles between the lower waste tires of the adjacent rigid piles, so that the height after filling is flush with the upper surfaces of the lower waste tires;
step four: laying geotechnical reinforcement on the upper surface of the lower waste tire, wherein connecting ribs in the reinforcing ribs penetrate the geotechnical reinforcement and are mutually constrained and positioned;
step five: arranging the upper waste tire right above the lower waste tire, enabling the upper end of the reinforcing rib to penetrate into the inner space of the upper waste tire, and pouring concrete;
step six: filling rubber particles between adjacent upper waste tires to enable the height of the filling area to be flush with the upper surfaces of the upper waste tires;
step seven: and laying geotechnical reinforcement on the upper surface of the upper waste tire, fixedly connecting the geotechnical reinforcement with the upper waste tire, and laying mixed filler above the geotechnical reinforcement to form the roadbed.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (6)
1. The utility model provides a pile type adds muscle embankment based on junked tire which characterized in that includes: the lower end of each rigid pile is inserted into a soft soil foundation, the upper end of each rigid pile is nested with a lower waste tire, the lower end of the lower waste tire wraps the side wall of the rigid pile, the upper end of the lower waste tire is stacked with an upper waste tire, concrete is poured into the upper waste tire and the lower waste tire, so that the upper waste tire, the lower waste tire and the rigid pile are fixedly connected into a whole, a drainage filler is arranged between the upper waste tire and the lower waste tire on the adjacent rigid piles, and a mixed filler is paved above the upper waste tire;
geotechnical reinforcements are arranged above the lower waste tire and the upper waste tire, the geotechnical reinforcements on the lower waste tire are fixedly connected with the rigid pile, the lower waste tire and the upper waste tire, and the geotechnical reinforcements on the upper waste tire are fixedly connected with the upper waste tire;
reinforcing ribs are arranged in the upper waste tire and the lower waste tire, and are mutually constrained and positioned with the geotechnical reinforcing ribs and poured with concrete into a whole;
the drainage filler is flexible rubber particles;
the working method of the pile-supported reinforced embankment comprises the following steps:
the method comprises the following steps: inserting a rigid pile into the soft soil foundation to enable the pile head at the upper end of the rigid pile to be higher than the thickness of a lower waste tire on the surface of the soft soil foundation;
step two: sleeving a lower waste tire on a rigid pile, placing reinforcing ribs in the lower waste tire, and then pouring concrete in the inner space of the lower waste tire, wherein the reinforcing ribs are arranged in a space manner and are in an inclined upward divergence shape;
step three: filling rubber particles between the lower waste tires of the adjacent rigid piles, so that the height after filling is flush with the upper surfaces of the lower waste tires;
step four: laying geotechnical reinforcement on the upper surface of the lower waste tire, wherein longitudinal ribs in the reinforcing ribs penetrate the geotechnical reinforcement and are mutually constrained and positioned;
step five: arranging the upper waste tire right above the lower waste tire, and pouring concrete after the upper part of the reinforcing rib penetrates into the inner space of the upper waste tire;
step six: filling rubber particles between adjacent upper waste tires to enable the height of the filling area to be flush with the upper surfaces of the upper waste tires;
step seven: and laying geotechnical reinforcement on the upper surface of the upper waste tire, fixedly connecting the geotechnical reinforcement with the upper waste tire, and laying mixed filler above the geotechnical reinforcement to form the roadbed.
2. The pile-supported reinforced embankment based on waste tires according to claim 1, wherein: the strengthening rib includes that a plurality of hoop stirrup different in size is radial muscle of indulging as the centre of a circle with above junked tire, the hoop stirrup distributes from top to bottom at equidistant in the space that last junked tire and junked tire down constitute, and the hoop stirrup horizontal plane that lies in the junked tire is provided with the muscle of indulging, and this hoop stirrup is from last to arranging into the round platform form by big to little down, and adjacent hoop stirrup passes through the splice bar connection and fixes.
3. The pile-supported reinforced embankment based on waste tires according to claim 1, wherein: the average particle size of the flexible rubber particles is 10-30 mm.
4. The pile-supported reinforced embankment based on waste tires according to claim 1, wherein: the mixed filler is a mixture of crushed building materials and waste tire rubber particles, the mass mixing ratio of the crushed building materials to the rubber particles is 5: 1-10: 1, the crushed building materials are slag, concrete blocks, broken stone blocks, broken brick and tile blocks or mortar, and the non-uniformity coefficient C of the mixed filleruNot less than 5, coefficient of curvature Cc ＝1～3。
5. The pile-supported reinforced embankment based on waste tires according to claim 1, wherein: the inner diameter of the lower waste tire is 10-30cm larger than the outer diameter of the rigid pile, and the outer diameter of the upper waste tire is 10-40cm larger than the outer diameter of the lower waste tire and smaller than the distance between the piles.
6. The pile-supported reinforced embankment based on waste tires according to claim 1, wherein: the top surface of the lower waste tire is flush with the top surface of the rigid pile.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011145414.5A CN112227340B (en) | 2020-10-23 | 2020-10-23 | Pile-supported reinforced embankment based on waste tires and working method thereof |
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| CN113818433B (en) * | 2021-09-10 | 2022-11-29 | 山东省交通规划设计院集团有限公司 | Variable-section waste tire pile composite foundation and construction process thereof |
| CN115029977B (en) * | 2022-06-16 | 2023-03-17 | 石家庄铁道大学 | Assembled composite road and bridge transition embankment and construction method thereof |
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