High-grade dike structure widened by heating ash-doped soft soil
Through the heating and ash-dip method, the problem of high bearing capacity and anti-seepage requirements in embankment projects is solved, and the dual functional requirements of simplified construction, low cost and structure are achieved, forming a cost-effective embankment reinforcement solution.
Patent Information
- Application Number
- CN202420889377.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-04-26
AI Technical Summary
In the prior art, soft soil is difficult to be used in dike projects with high requirements for bearing capacity and air-retaining and anti-seepage requirements, and the curing agent is large, the cost is high, and the construction process is complex, which cannot meet the needs of high-grade dike projects.
Using the method of heating and mixing ash, the quicklime blocks and soft soil are repeatedly mixed, heated, left to stand and rolled layer by layer to form a soil ash mixture layer, reduce the moisture content and void ratio of the soft soil, increase the soil compactness and Strength, and fill the burrow structure with blocks of stone and additional earthwork to form a structure with bearing capacity and anti-seepage functions.
It achieves simplicity of construction and low cost, meets the dual functional requirements of the embankment structure, reduces the decline in permeability, narrows the reinforcement range, and saves engineering costs.
Smart Images
Figure CN222294831U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of embankment engineering reinforcement, and relates to a soft soil widening high-grade embankment structure. Background Art
[0002] Soft soil has high water content and low strength, making it difficult to compact. It cannot be directly used for filling the embankment parts with bearing capacity requirements and airtightness and anti-seepage requirements in embankment projects and the widening parts of the embankment in high-grade embankment projects. In order to use soft soil in the above-mentioned parts, people usually use a solidification treatment method in which various curing agents are fully mixed with soft soil, which is called "solidified soil". The construction of solidified soil requires special large-scale machinery, the construction process is relatively complicated, the amount of curing agent is large, and the cost is very high; lime is often used as a "curing agent" in highway projects to form "lime soil", but it also has the disadvantages of large amount of lime, high cost, and limited application range. The effect of high lime content on the permeability of lime-soil mixture is not considered. It is generally used for soil roadbed treatment or filling with not too high water content, slightly poor foundation bearing capacity, and not thick. The application scenario is different from that of high-grade embankment projects with both bearing capacity requirements and airtightness and anti-seepage requirements. Utility Model Content
[0003] In order to overcome the shortcomings of the existing technology such as complex construction process, high cost, and limited application scope, the utility model proposes a high-grade embankment structure that is simple to construct and low in cost and uses heated, lime-mixed soft soil to make it wider.
[0004] The technical solution adopted by the utility model to solve its technical problems is:
[0005] A high-grade embankment structure using heated and ash-mixed soft soil to widen it includes embankment stones and embankment earthwork, wherein the embankment stones are located at the front part of the embankment earthwork, and is characterized in that the soft soil widening high-grade embankment structure also includes block stones squeezed into the earthwork, a soil-ash mixture layer and additional earthwork, the block stones squeezed into the earthwork are located at the upper part of the embankment earthwork, the upper part of the block stones squeezed into the earthwork is the soil-ash mixture layer, the top surface of the soil-ash mixture layer is flush with the top surface of the embankment stones, the additional earthwork is located at the rear part of the embankment earthwork, and the top elevation of the additional earthwork is higher than the top elevation of the block stones squeezed into the earthwork.
[0006] Furthermore, the soil-ash mixture layer is formed by repeatedly mixing quicklime blocks and soft soil, heating, standing, and layered rolling, and the layered rolling thickness is 10 to 40 cm.
[0007] Furthermore, the soft soil is the soft abandoned soil in various engineering construction foundation pits or tunnels, the soft soil dredged from rivers and lakes, or the soft soil on coastal tidal flats.
[0008] Furthermore, the volume ratio of the quicklime blocks to the soft soil is 0.1% to 20%.
[0009] The technical concept of the utility model is as follows: a mixture formed by adding a small amount of quicklime blocks and heating the soft soil during repeated mixing is layered and filled, the characteristics of the quicklime blocks absorbing water and undergoing a series of physical and chemical reactions with the soft soil and the additional heating during repeated crushing and mixing are utilized to accelerate the evaporation of water in the soft soil, and finally the water content and porosity of the soft soil are greatly reduced, the soil body is compacted, and the strength is increased through conventional rolling, so as to form a soil structure body with both a certain bearing capacity and an air-tight and anti-seepage function; at a certain elevation of the soil body to be reinforced, block stones are squeezed and filled, and conventional air-tight soil filling is added at the rear side, so that the elevation range of the reinforcement is reduced, thereby saving engineering costs.
[0010] The beneficial effects of the utility model are mainly manifested in: easy operation; low cost, which is significantly lower than the cost of using conventional curing agents to solidify soft soil fill in situ or ex situ; the permeability of the soil after solidification and compaction decreases less, so that the structure of the treated soft soil fill can meet the dual functional requirements of anti-seepage and air-tightness and roadbed bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of a high-grade embankment structure that is widened by using heated, lime-mixed soft soil.
[0012] The accompanying drawings are marked as follows: 1—original embankment stone; 2—original embankment earth; 3—blocks of stone squeezed into the earth; 4—soil-ash mixture layer; 5—additional earth. DETAILED DESCRIPTION
[0013] The utility model is further described below in conjunction with the accompanying drawings.
[0014] Reference Figure 1 A high-grade embankment structure using heated and ash-mixed soft soil to widen it includes embankment stones 1 and embankment earthwork 2, the embankment stones 1 are located in the front part of the embankment earthwork 2, the soft soil widened high-grade embankment also includes block stones 3 squeezed into the earthwork, a soil-ash mixture layer 4 and additional earthwork 5, the block stones 3 squeezed into the earthwork are located on the upper part of the embankment earthwork 1, the upper part of the block stones 3 squeezed into the earthwork is the soil-ash mixture layer 4, the top surface of the soil-ash mixture layer 4 is flush with the top surface of the embankment stones 1, the additional earthwork 5 is located at the rear part of the embankment earthwork 2, and the top elevation of the additional earthwork is higher than the top elevation of the block stones squeezed into the earthwork.
[0015] Furthermore, the soil-ash mixture layer is formed by repeatedly mixing quicklime blocks and soft soil, heating, standing, and layered rolling, and the layered rolling thickness is 10 to 40 cm.
[0016] Furthermore, the soft soil is the soft abandoned soil in various engineering construction foundation pits or tunnels, the soft soil dredged from rivers and lakes, or the soft soil on coastal beaches.
[0017] Furthermore, the volume ratio of the quicklime blocks to the soft soil is 0.1% to 20%.
[0018] The construction method of this embodiment is a construction process for the soil-ash mixture layer 4. First, soft soil and quicklime blocks of a set proportion are piled or spread to the part of the embankment that needs to be widened and filled and mixed to form a mixture, which is then piled on the spot for a set period of time; then, the mixture is repeatedly crushed and mixed on the spot again, and the mixture and the mixing plow are heated or blown with hot air while mixing; the mixture is evenly thinned to a designed thickness, and a rolling machine is used to repeatedly roll the mixture until the density meets the requirements; the above process is repeated, and the filling and heightening are carried out in layers until the filling reaches the designed elevation.
[0019] The construction method comprises the following steps:
[0020] Step 1: Soft soil and quicklime blocks of a set proportion are piled or spread on site to the part of the embankment to be widened and filled for the first mixing to form a mixture, and after the mixing is completed, the mixture is left on site for 12 to 720 hours;
[0021] Step 2: the mixture is evenly spread to the part of the embankment that needs to be widened and filled, with a thickness of 10 to 50 cm;
[0022] Step 3, the mixture is crushed and mixed on site for a second time, and the mixture and the plow used for mixing are heated or blown with hot air at the same time during mixing;
[0023] Step 4, repeatedly rolling the mixture using a rolling machine;
[0024] Step 5: Repeat steps 1 to 4 in sequence, filling and raising the height in layers until the filling is completed.
[0025] The contents described in the embodiments of this specification are merely enumerations of implementation forms of the utility model concept and are for illustrative purposes only. The protection scope of the utility model should not be considered to be limited to the specific forms described in this embodiment, and the protection scope of the utility model also extends to equivalent technical means that ordinary technicians in this field can think of based on the concept of the utility model.
Claims
1. A high-grade embankment structure using heated lime-mixed soft soil to make it wider, comprising embankment stones and embankment earthwork, wherein the embankment stones are located at the front of the embankment earthwork, and characterized in that: The soft soil widened high-grade embankment structure also includes blocks of stone squeezed into the earth, a soil-ash mixture layer and additional earth. The blocks of stone squeezed into the earth are located on the upper part of the embankment body earth. The upper part of the blocks of stone squeezed into the earth is the soil-ash mixture layer. The top surface of the soil-ash mixture layer is flush with the top surface of the stones of the embankment body. The additional earth is located at the rear of the embankment body earth. The top elevation of the additional earth is higher than the top elevation of the blocks of stone squeezed into the earth.
2. A high-grade embankment structure using heated lime-mixed soft soil to widen the embankment as claimed in claim 1, characterized in that: In the soil-ash mixture layer, the layered rolling thickness is 10 to 40 cm.
3. A high-grade embankment structure using heated lime-mixed soft soil to widen the embankment as claimed in claim 1 or 2, characterized in that: The soft soil is weak abandoned soil in various engineering construction foundation pits or tunnels, soft soil dredged from rivers and lakes, or soft soil on coastal beaches.