CN211816368U - Ecological environment-friendly foundation structure for reinforcing soft foundation - Google Patents
Ecological environment-friendly foundation structure for reinforcing soft foundation Download PDFInfo
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- CN211816368U CN211816368U CN202021881727.2U CN202021881727U CN211816368U CN 211816368 U CN211816368 U CN 211816368U CN 202021881727 U CN202021881727 U CN 202021881727U CN 211816368 U CN211816368 U CN 211816368U
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Abstract
The utility model relates to an ecological environmental protection foundation structure of consolidating soft base, include: the combined bamboo joint pile comprises a plurality of bamboo joint piles bound together; the bamboo cushion is fixedly connected with the pile head of the combined bamboo joint pile, the bamboo cushion comprises a plurality of layers of bamboo raft formed by binding a plurality of bamboo poles, and the bamboo poles of the bamboo raft in different layers are arranged in different directions. The utility model discloses the superior structural feature of full play mao bamboo, it is high than drainage consolidation method soil body intensity after handling, subside for a short time, application scope is wide. The environment-friendly effect is good, the damage to natural soil is small, and the long-term and deep ecological environment problem caused by the difficulty in degradation of the plastic drainage plate is avoided. Simple structure, construction convenience, cost are lower. The foundation treatment is used as an engineering technical measure for improving the bearing capacity of the foundation, so that the requirement on durability is low; a pile group foundation consisting of a plurality of combined bamboo joint piles is adopted instead of a single pile, so that the problem that the distance between collapsed piles is too small due to the fact that the surface friction coefficient of the bamboo joint foundation pile is small is solved.
Description
Technical Field
The utility model relates to a geotechnical engineering field especially relates to an ecological environmental protection foundation structure of consolidating soft base.
Background
As the economy develops and population increases dramatically, the problem of land resources becoming scarce becomes increasingly tense and buildings have to be built on soft soil foundations. Soft soils, due to their low shear strength, high water content, poor water permeability, and certain rheological properties, require treatment when infrastructure is built on top of them. At present, the treatment scheme of saturated soft clay mainly comprises two main types, one is a drainage consolidation prepressing method; the other is a composite foundation method.
The drainage consolidation preloading method is a method for accelerating the consolidation of saturated soft clay by applying preloading and additionally arranging various drainage conditions (drainage bodies such as sand wells, plastic drainage plates and the like) by utilizing the drainage consolidation characteristic of foundation soil. Vacuum preloading, surcharge preloading, precipitation preloading, electroosmotic preloading and the like belong to this category.
The main disadvantages of the drainage consolidation prepressing method are: firstly, the self characteristics of sand wells and plastic drainage plate structures and a drainage mechanism are adopted, so that the time required by foundation drainage consolidation is long, and the drainage structure is easily blocked by small particles in a soil body, so that the drainage capacity is reduced; secondly, artificial synthetic materials which are difficult to degrade are embedded into the natural foundation regardless of the sand well or the plastic drainage plate; in particular, the plastic drainage plate is made of high-density polyethylene material, which is not decomposed for decades, so that the crops can absorb nutrients and moisture, the yield of the crops is reduced, and the environment is polluted greatly; thirdly, the bearing capacity and settlement of the treated foundation are difficult to meet the use requirements of roadbeds such as highways, railways and the like, secondary treatment is needed, and the cost is high.
The composite foundation method is that part of soil body of the natural foundation is enhanced or replaced in the foundation treatment process, or reinforcement material is arranged in the natural foundation, and the reinforcement area is an artificial foundation consisting of a matrix (the soil body of the natural foundation or the improved soil body of the natural foundation) and a reinforcement body. Generally, the method is divided into a cement-soil mixing pile composite foundation, a high-pressure injection grouting pile composite foundation, a sand pile foundation, a vibroflotation pile composite foundation, a soil and lime compacted pile composite foundation, a cement fly ash gravel pile composite foundation and a rammed cement-soil pile composite foundation. Has the advantages of high strength, small sedimentation, suitability for various soil layers and the like. However, most treatment methods consider chemical reinforcement of the foundation, and utilize curing agents such as cement paste, chemical grout, fly ash and the like and physical and chemical reactions between the curing agents and the foundation soil to harden the soil. The natural foundation and the underground water are damaged, and the environmental pollution is serious.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art and combine the advantages of the two methods, the utility model provides an ecological environment-friendly foundation structure for reinforcing soft foundation, which utilizes the characteristics of large bamboo yield, gap water seepage, compression resistance, bending strength superior to that of a flexible drainage plate and the like in China to form horizontal and vertical drainage channels and form a pile body with certain strength in soil, so that the bearing function and the drainage function of the pile body are combined; the test proves that the foundation treatment effect is superior to that of a drainage consolidation method, and the foundation treatment method has no damage to the natural environment, and is an effective foundation treatment measure.
The utility model discloses a realize above-mentioned purpose, adopt following technical scheme:
an eco-friendly foundation structure for reinforcing a soft foundation, comprising:
the combined bamboo joint pile comprises a plurality of bamboo joint piles bound together;
the bamboo cushion is fixedly connected with the pile head of the combined bamboo joint pile, the bamboo cushion comprises a plurality of layers of bamboo raft formed by binding a plurality of bamboo poles, and the bamboo poles of the bamboo raft in different layers are arranged in different directions.
Furthermore, the diameter of the bamboo joint pile is 8-12cm, and the length of the bamboo joint pile is 6-15 m.
Furthermore, the elevation of the pile top is 5-15cm higher than the natural mud surface when the combined bamboo joint pile is erected.
Furthermore, each combined bamboo joint pile comprises three or four or seven bamboo joint piles, and the bamboo joint piles are bound through a plurality of steel bars.
Further, the bamboo mat comprises three to five layers of bamboo rows.
Furthermore, the directions of the bamboo poles of two adjacent layers of bamboo raft are mutually vertical.
Furthermore, a pile core reinforcement cage is arranged in the bamboo joint pile, and an anti-corrosion coating is coated outside the pile core reinforcement cage.
Furthermore, the bamboo joint piles and the bamboo poles are both made of moso bamboos.
Furthermore, the distance between adjacent combined bamboo joint piles is 1.5-2 m.
The utility model has the advantages that:
(1) the utility model discloses combine together the advantage of drainage consolidation method and compound ground method, the superior structural feature of full play mao bamboo, it is high than drainage consolidation method soil body intensity after the processing, subside for a short time, application scope is wide.
(2) The environment-friendly effect is good, the damage to the natural soil body is small, and the long-term and deep ecological environment problem caused by difficult degradation of the plastic drainage plate is avoided; and the pollution to underground water and soil caused by reinforcing the soil body by adopting a chemical grouting method in the composite foundation is avoided.
(3) Simple structure, construction convenience, cost are lower. The foundation treatment is used as an engineering technical measure for improving the bearing capacity of the foundation, so that the requirement on durability is low; the moso bamboo with good mechanical property is placed in soft soil to form a friction pile, so that the material cost and the construction cost are greatly reduced compared with various reinforced concrete material piles; a pile group foundation consisting of a plurality of combined bamboo joint piles is adopted instead of a single pile, so that the problem that the distance between collapsed piles is too small due to the fact that the surface friction coefficient of the bamboo joint foundation pile is small is solved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a combined bamboo joint pile;
in the figure: 1-combining bamboo joint piles; 11-bamboo joint piles; 12-reinforcing steel bars; 13-pile core reinforcement cage; 2-bamboo cushion; 21-bamboo raft;
the following detailed description will be made in conjunction with embodiments of the present invention with reference to the accompanying drawings.
Detailed Description
The invention will be further explained with reference to the following figures and examples:
as shown in the drawings, an eco-friendly foundation structure for reinforcing a soft foundation includes:
the combined bamboo joint pile 1 comprises a plurality of bamboo joint piles 11 bound together and used as a vertical drainage channel;
the bamboo mat 2 is fixedly connected with the pile head of the combined bamboo joint pile 1, the bamboo mat 2 comprises a plurality of layers of bamboo raft 21 formed by binding a plurality of bamboo poles, and the bamboo poles of the bamboo raft 21 in different layers are arranged in different directions and are used as horizontal drainage channels.
Furthermore, the diameter of the bamboo joint pile 11 is 8-12cm, and the length is 6-15 m.
Furthermore, the elevation of the pile top is 5-15cm higher than the natural mud surface when the combined bamboo joint pile 1 is erected.
Furthermore, each combined bamboo joint pile 1 comprises three or four or seven bamboo joint piles 11, and the bamboo joint piles 11 are bound through a plurality of steel bars 12.
Further, the bamboo mat 2 includes three to five layers of bamboo raft 21.
Further, the directions of the bamboo poles of two adjacent bamboo raft layers 21 are perpendicular to each other.
Further, a pile core reinforcement cage 13 is arranged in the bamboo joint pile 11, and an anticorrosive coating is coated outside the pile core reinforcement cage 13.
Further, the bamboo joint piles 11 and the bamboo poles are made of moso bamboos.
Further, the distance between adjacent combined bamboo joint piles 1 is 1.5-2 m.
During construction, firstly, the combined bamboo joint piles 1 are driven, when the combined bamboo joint piles are driven, a conventional portal type driving frame and a hydraulic hammer can be adopted for construction, the weight of the hammer is not too large, the combined bamboo joint piles are driven without being driven into a bearing layer, after foundation treatment is completed, lower soil layers outside and outside a foundation treatment range are subjected to weak lower lying soil layer checking calculation, and the required foundation treatment depth is calculated and is the driving depth. The design of the combined bamboo joint pile 1 can utilize the variable stiffness leveling principle to adjust the pile length, the pile diameter and the pile arrangement mode so as to control uneven settlement. If the combined bamboo joint pile 1 does not meet the requirement of foundation treatment, a pile core reinforcement cage 13 is erected in the bamboo joint pile 11 to increase the strength.
After the driving is finished, the bamboo pad 2 is bound on site, the bound bamboo pad 2 is fixed with the pile head of the combined bamboo joint pile 1, the bamboo pad 2 not only has the function of forming a horizontal drainage channel, but also strengthens the combined action of the combined bamboo joint pile 1 and the foundation soil, and the load sharing ratio of the soil between the piles can be adjusted by adjusting the thickness of the bamboo pad 2.
After the bamboo mat 2 is constructed, the roadbed backfill can be used as a stacking material.
It should be noted that, in the construction of a foundation system, when the foundation treatment range is too large, segmentation and blocking are required, and open trench excavation is required to be performed at the boundary for drainage.
Monitoring the foundation treatment process according to the standard in the construction process, wherein the monitoring contents mainly comprise surface settlement and layered settlement; monitoring pore water pressure and water level; lateral displacement of deep soil layer, etc.
Before and after construction, indoor physical and mechanical index tests before and after soil body reinforcement are required; carrying out an on-site cross plate shearing test; static cone penetration test; performing a standard penetration test; plate load test, etc.
The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and various improvements made by the method concept and technical solution of the present invention or directly applied to other occasions without improvement are all within the protection scope of the present invention.
Claims (9)
1. An ecological environment-friendly foundation structure for reinforcing a soft foundation, comprising:
the combined bamboo joint pile comprises a plurality of combined bamboo joint piles (1), wherein each combined bamboo joint pile (1) comprises a plurality of bamboo joint piles (11) bound together;
the bamboo mattress comprises a bamboo mat (2), the bamboo mat (2) and the combined bamboo joint piles (1) are perpendicular to each other and are fixedly connected with pile heads of the combined bamboo joint piles (1), the bamboo mat (2) comprises a plurality of layers of bamboo raft (21) formed by binding a plurality of bamboo poles, and the bamboo poles of the bamboo raft (21) in different layers are arranged in different directions.
2. The eco-friendly foundation structure for reinforcing a soft foundation as claimed in claim 1, wherein the bamboo piles (11) have a diameter of 8-12cm and a length of 6-15 m.
3. The ecological and environment-friendly foundation structure for reinforcing soft foundation according to claim 1, wherein the height of the pile top is 5-15cm higher than the natural mud surface when the combined bamboo joint piles (1) are erected.
4. The ecological and environment-friendly foundation structure for reinforcing soft foundation according to claim 1, wherein each combined bamboo joint pile (1) comprises three or four or seven bamboo joint piles (11), and the bamboo joint piles (11) are bound by a plurality of steel bars (12).
5. The eco-friendly foundation structure for reinforcing a soft foundation as claimed in claim 1, wherein the bamboo mat (2) comprises three to five layers of bamboo rows (21).
6. The eco-friendly foundation structure for reinforcing a soft foundation as claimed in claim 1, wherein the direction of the bamboo poles of the adjacent two bamboo raft layers (21) is perpendicular to each other.
7. The ecological and environment-friendly foundation structure for reinforcing soft foundation according to any one of claims 1 to 6, characterized in that a pile core reinforcement cage (13) is arranged in the bamboo joint pile (11), and the pile core reinforcement cage (13) is coated with an anticorrosive coating.
8. The eco-friendly foundation structure for reinforcing a soft foundation as claimed in any one of claims 1 to 6, wherein the bamboo joint piles (11) and the bamboo poles are made of moso bamboo.
9. The ecological and environment-friendly foundation structure for reinforcing soft foundation according to any one of claims 1 to 6, wherein the distance between adjacent combined bamboo joint piles (1) is 1.5-2 m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021881727.2U CN211816368U (en) | 2020-09-02 | 2020-09-02 | Ecological environment-friendly foundation structure for reinforcing soft foundation |
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| CN202021881727.2U CN211816368U (en) | 2020-09-02 | 2020-09-02 | Ecological environment-friendly foundation structure for reinforcing soft foundation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113186777A (en) * | 2021-05-26 | 2021-07-30 | 中国十九冶集团有限公司 | Temporary pavement built on soft soil foundation and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113186777A (en) * | 2021-05-26 | 2021-07-30 | 中国十九冶集团有限公司 | Temporary pavement built on soft soil foundation and construction method thereof |
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