CN113445521B - High side slope construction method for filling - Google Patents
High side slope construction method for filling Download PDFInfo
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- CN113445521B CN113445521B CN202110933539.2A CN202110933539A CN113445521B CN 113445521 B CN113445521 B CN 113445521B CN 202110933539 A CN202110933539 A CN 202110933539A CN 113445521 B CN113445521 B CN 113445521B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
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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
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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Abstract
The application relates to a soil filling high side slope construction method, which relates to the technical field of geotechnical engineering filling side slopes and comprises S1, wherein the high side slope is sequentially divided into a slope toe arranged at the bottom, a first-stage side slope, a second-stage side slope … …, an nth-stage side slope and a last-stage side slope from bottom to top; s2, preliminarily determining the heights and slope rates of all levels of slopes and the width of a platform according to the total height of the proposed high slope; s3, carrying out layered filling on the side slope filling, and carrying out dynamic compaction on the filling after the filling of each layer of the side slope is completed; s4, carrying out in-situ test on the filled soil after dynamic compaction, and rechecking to determine the height and slope rate of each level of side slope and the width of the platform; s5, repeating the step S3, thereby completing the filling and tamping work of the slopes at all levels; s6, digging and brushing slopes on the side slopes at all levels, and protecting the slopes of the side slopes at all levels after the slope brushing is finished. This application has the effect that reduces current high slope construction cost of filling out soil and improve the efficiency of construction.
Description
Technical Field
The application relates to the technical field of filling slopes in geotechnical engineering, in particular to a high slope filling construction method.
Background
The filling structure is loose, the compressibility is high, the physical and mechanical properties are uneven, the stability is poor, and if necessary treatment measures are not taken after stacking, geological disasters are easy to generate, so that the filling side slope is often required to be provided with supporting structures such as retaining walls, pile plates, pile anchors and the like, and the soil body is treated by adopting a compaction method or a tamping method. The filling side slope is difficult to be effectively compressed due to the difficulty of a filling body, the shear strength is not high, and the height of the filling side slope is often greatly limited. At present, the limited height of the filled slope can be improved by methods of slowing down the slope-laying rate of the slope, arranging geogrid reinforced layered compacted filling in the soil body, adding additives to improve the strength of filling materials and the like.
Aiming at the related technologies, the slope-raising rate of the side slope is slowed down, and the higher side slope needs to occupy larger horizontal space, is often limited by the field and cannot be applied; the geogrid is arranged in the soil body to reinforce, layer and compact, the working procedure is more complicated, the requirement on the construction level is high, longer and denser reinforcement materials are needed, the efficiency is higher, and the cost is not low; the strength of the filling material body is improved by adding the admixture, and the soil body strength is improved by adding the gelled materials such as broken stones, cement, lime and the like into the filling soil, so that the cost is high.
Disclosure of Invention
In order to solve the problem that the construction cost of the existing soil-filling high slope is high, the application provides a soil-filling high slope construction method.
The application provides a high slope construction method of filling soil, adopts the following technical scheme.
A construction method for a soil-filling high slope comprises the following steps:
s1, sequentially dividing the high slope from bottom to top into a slope toe arranged at the bottom, a first-stage slope, a second-stage slope … …, an nth-stage slope and a last-stage slope, wherein the lower end of each stage of slope is provided with a platform;
s2, preliminarily determining the height and slope rate of each grade of side slope and the width of the platform according to the total height of the proposed high side slope;
s3, filling the side slope filling in layers, wherein after filling of each layer of side slope is completed, the filling can be tamped by adopting a dynamic compaction method, and the filling work of the next layer of filling is continued after the filling and the dynamic compaction of the filling;
s4, carrying out in-situ test on the filled soil after dynamic compaction, and rechecking to determine the height and slope rate of each level of side slope and the width of the platform;
s5, repeating the step S3, thereby completing the filling, dynamic compaction and tamping work of the slopes at all levels;
s6, excavating and brushing slopes on the side slopes at all levels, and protecting the slopes of the side slopes at all levels after the slope brushing is finished.
By adopting the technical scheme, the filling body is subjected to layered dynamic compaction by adopting a dynamic compaction method, the dynamic compaction of the slope body covers the whole range of the slope body, the dynamic compaction and compaction effect of the filling of the slope body is ensured, the area range which cannot be covered by the dynamic compaction and compaction effect is removed by removing the slope body reserved in advance, and the soil is removed and the slope is brushed after the dynamic compaction filling is finished, so that the compactness and the strength of the filling of the slope surface are ensured; the filling body is subjected to heavy-thickness layered dynamic compaction by adopting a dynamic compaction method, so that the filling work efficiency is effectively improved, and the filling cost is reduced; can ensure the domatic protection of side slope, the later maintenance of being convenient for, and the afforestation construction of being convenient for accords with the afforestation engineering requirement.
Optionally, when the step S2 is performed, according to the total height of the intended high slope, firstly, performing arc sliding method on the stability of the intended slope by using empirical parameters of soil filling after dynamic compaction, preliminarily determining the heights and slope rates of all levels of slopes and the widths of platforms at all levels, controlling the height of each level of the slope to be 8-10m, the slope rate to be 1:1-1:1.5 and the platform width to be 2-3m, performing in-situ test on the soil filling after the in-situ dynamic compaction test to obtain an accurate shear strength index of the soil filling, and performing slope stability checking calculation.
By adopting the technical scheme and the steps, a large-area soil filling and dynamic compaction filling scheme can be obtained, and subsequent orderly construction is facilitated.
Optionally, when the step S3 is performed, the layered thickness of each level of side slope is controlled to be 5 to 6m, or the layered thickness of each level of side slope is controlled to be 1/2 of the height of each level of side slope.
By adopting the technical scheme, the layered thickness of each grade of side slope is controlled to be 5-6m, or the layered thickness of each grade of side slope is controlled to be 1/2 of the height of each grade of side slope, so that the layered dynamic compaction can be ensured to be real-time, and each layer of filling soil can be compacted tightly under the conventional compaction energy.
Optionally, the dynamic compaction and tamping operation of step S3 includes the following steps:
a1, cleaning and leveling a construction site, marking the position of a tamping point for the first time, and measuring the ground elevation of the tamping point;
a2, positioning the rammer, hoisting a lifting hook to a designed drop distance height, fixing a steel wire rope by the lifting hook, locking the drop distance, then stably lifting the rammer to place at a ramming point, and measuring the height of the top of the rammer before ramming;
a3, hoisting the rammer to a preset height, automatically unhooking the rammer, dropping the rammer to a ramming point, measuring the elevation of the top of the rammer, and recording the sinking amount of the rammer pit;
a4, repeating the step a3, and completing the tamping of one tamping point according to the designed tamping number and the control standard;
a5, shifting the rammer to the next ramming point, and repeating the steps a 2-a 4 to finish the ramming of all ramming points in the first pass;
a6, filling or leveling a rammed pit by using a bulldozer, measuring the elevation of the site by using a square grid, and calculating the ramming amount of the site at the current time;
a7, completing all tamping times according to the steps after the specified pause time;
a8, after the intermission time is met, full ramming construction is carried out, soil on the surface layer of the field is loosened and tamped, and the elevation of the tamped field is measured.
By adopting the technical scheme, the dynamic compaction tamping work of filling soil of each layer in each grade of side slope can be completed through the steps, the tamping is tight, landslide is not easy to occur, the shearing strength of a soil body is high, the bearing capacity of the slope surface is strong, and later slope brushing excavation construction is facilitated.
Optionally, the a8 includes the following steps:
b1, leveling the field, measuring the elevation of the field, and playing a full-compaction datum line;
b2, positioning the crane, and placing the rammer at the datum line end;
b3, tamping point by point according to the principle of tamping overlap 1/4 hammer diameter, completing the specified tamping number, temporarily setting as 3 tamping, tamping row by row, completing one-time full tamping, and measuring the elevation of the field by using a square grid;
b4, compacting the virtual soil layer by using a road roller on the ground after full compaction and leveling, and measuring the elevation of the ground by using a square grid.
By adopting the technical scheme, the full-compaction construction of filling soil of each layer can be completed by utilizing the steps, the compactness of the filling soil is further increased, and the slope surface strength of each level of side slope can be further increased.
Optionally, in step S4, the temporary tamping slope at each stage should exceed the horizontal distance of the edge of the platform after the slope brushing by 5m, and the temporary tamping slope should exceed the horizontal distance of the toe after the slope brushing by 5 m.
By adopting the technical scheme and utilizing the steps, the filling soil on the surface layer of the temporary tamping filling slope can be removed in the slope brushing process, so that the compactness of the slope surface of the side slope is further ensured.
Optionally, in step S5, the brushing of the slope should be performed sequentially from top to bottom, and the brushing of the slope should be performed in layers and sections, with the layered thickness meeting the temporary slope stability requirement on site.
Through adopting above-mentioned technical scheme, through top-down excavation brush slope, and brush slope excavation construction layering segmentation goes on for higher level's side slope is when excavating the brush slope, and the banket soil that is excavated can be tamped naturally on the side slope of subordinate, improves the interim ramming fill slope face width increase of side slope of subordinate, the brush slope equipment construction of being convenient for.
Optionally, when the step S6 is performed, after the construction of the brushing and excavating is completed, a three-dimensional geonet is arranged on the slope surface of each level of slope for vegetation greening.
By adopting the technical scheme, the three-dimensional geonet technology integrates the advantages of vegetation protection slope, and the problem of slope protection can be effectively solved.
Optionally, when the step S6 is performed, after the slope brushing excavation construction is completed, anchor rods are arranged on the slope surfaces of the side slopes at all levels to reinforce the slope body.
Through adopting above-mentioned technical scheme, the stock is better to domatic protecting effect, is applicable to the higher condition of side slope of filling out behind the brush slope.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the filling body is subjected to layered dynamic compaction by adopting a dynamic compaction method, the dynamic compaction of the slope body covers the whole range of the slope body, the dynamic compaction effect of the slope body filling is ensured, the area range which cannot be covered by the dynamic compaction effect is removed by removing the slope body reserved in advance, soil is removed and the slope is brushed after the dynamic compaction filling is finished, and the compactness and the strength of the slope surface filling are ensured;
2. the filling body is subjected to large-thickness layered dynamic compaction by adopting a dynamic compaction method, so that the filling work efficiency is effectively improved, and the filling cost is reduced;
3. can ensure the domatic protection of side slope, the later maintenance of being convenient for, and the afforestation construction of being convenient for accords with the afforestation engineering requirement.
Drawings
FIG. 1 is a schematic view of a state after the layered filling and dynamic compaction of the filled high slope of embodiment 1 of the present application and before the construction of slope brushing;
fig. 2 is a schematic view of a state after completion of soil cutting and brushing of the high-slope filled with soil according to embodiment 1 of the present application.
Fig. 3 is a schematic view of a state after completion of soil cutting and brushing of the high-slope filled with soil according to embodiment 2 of the present application.
Reference numerals are as follows: 1. a platform; 11. intercepting a water ditch; 12. an upward and oblique water drain pipe; 13. a drainage ditch; 2. a three-dimensional geonet; 3. an anchor rod.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
Example 1:
the embodiment of the application discloses a construction method of a soil filling high slope. Referring to fig. 1 and 2, the construction method includes the following steps.
S1, sequentially dividing the high slope from bottom to top into a slope toe arranged at the bottom, a first-stage slope, a second-stage slope … …, an nth-stage slope and a last-stage slope, wherein the lower end of each stage of slope is provided with a platform 1;
s2, preliminarily determining the heights and slope rates of all levels of slopes and the width of the platform 1 according to the total height of the proposed high slope;
s3, filling the side slope filling in layers, wherein after filling of each layer of side slope is completed, the filling can be tamped by dynamic compaction, and the filling work of the next layer of filling is continued after the filling and the dynamic compaction of the filling;
S4, carrying out in-situ test on the filled soil after dynamic compaction and tamping, and rechecking to determine the height and slope rate of each grade of side slope and the width of the platform;
s5, repeating the step S3, thereby completing the filling, dynamic compaction and tamping work of the slopes at all levels;
s6, digging and brushing slopes on the side slopes at all levels, and performing slope protection on the side slopes at all levels after the slope brushing is completed.
When the step S2 is carried out, according to the total height of the intended high slope, firstly, the empirical parameters of the filled soil after dynamic compaction are adopted to carry out arc sliding method to calculate the stability of the intended slope, the height and slope rate of each level of the slope and the width of each level of the platform 1 are preliminarily determined, the height of each level of the slope can be controlled to be 8-10m, the slope rate is 1:1-1:1.5, the width of the platform 1 is 2-3m, after the field dynamic compaction test, the filled soil is subjected to in-situ test to obtain the accurate shear strength index of the filled soil, and the slope stability checking calculation is carried out.
It should be noted that the total height of the proposed high fill side slope is the total height of the planned high fill side slope, and is not the actual height of the high fill side slope after the construction is completed.
Step S3, controlling the layered thickness of each grade of side slope to be 5-6m, or controlling the layered thickness of each grade of side slope to be 1/2 of the height of each grade of side slope; the dynamic compaction and tamping operation of the step S3 comprises the following steps:
a1, cleaning and leveling a construction site, marking the position of a tamping point for the first time, and measuring the ground elevation of the tamping point;
a2, positioning the rammer, hoisting a lifting hook to a designed drop distance height, fixing a steel wire rope by the lifting hook, locking the drop distance, then stably lifting the rammer to place at a ramming point, and measuring the height of the top of the rammer before ramming;
a3, hoisting the rammer to a preset height, automatically unhooking the rammer, dropping the rammer to a ramming point, measuring the elevation of the top of the rammer, and recording the sinking amount of the rammer pit;
a4, repeating the step a3, and completing the tamping of one tamping point according to the designed tamping number and the control standard;
a5, shifting the rammer to the next ramming point, and repeating the steps a 2-a 4 to finish the ramming of all ramming points in the first pass;
a6, filling or flattening the ramming pit by using a bulldozer, measuring the elevation of the field by using a square grid, and calculating the ramming amount of the field at the current time;
a7, after the specified pause time, completing all tamping passes according to the steps;
a8, after the intermission time is met, full ramming construction is carried out, soil is loosened on the surface layer of the field, dynamic ramming is carried out, and the elevation of the field after ramming is measured.
Wherein, a8 includes the following steps:
b1, leveling the field, measuring the elevation of the field, and playing a full-compaction datum line;
b2, positioning the crane, and placing the rammer at the datum line end;
b3, tamping point by point according to the principle of tamping overlap 1/4 hammer diameter, completing the specified tamping number, temporarily setting as 3 tamping, tamping row by row, completing one-time full tamping, and measuring the elevation of the field by using a square grid;
b4, compacting the virtual soil layer by using a road roller on the ground after full compaction and leveling, and measuring the elevation of the ground by using a square grid.
It should be noted that, during the filling construction of each level of side slope (i.e., the first level side slope, the second level side slope … … nth level side slope and the last level side slope), the side slope needs to be divided into multiple layers of filling bodies along the height of each level of side slope for construction, and a complete side slope (i.e., any one of the first level side slope and the second level side slope … … nth level side slope) can be formed after the construction of each layer of filling body is completed.
Referring to fig. 1 and 2, in step S4, each stage of temporary tamping and filling slope surface should exceed the horizontal distance 5m from the edge of the platform 1 after the slope brushing, the temporary tamping and filling slope surface should exceed the horizontal distance 5m from the slope toe after the slope brushing, the slope brushing should be performed sequentially from top to bottom, the slope brushing and the excavation should be performed in layers and sections, and the layering thickness is based on meeting the requirement of the stability of the temporary side slope on site. When the slope brushing work is carried out, large construction equipment such as an excavator is utilized to dig downwards along the slope surface of the side slope, and when the digging is carried out, the shovel head of the excavator can further compact the slope surface of the side slope when the surplus filling soil on the slope surface of the side slope is cut downwards.
After the slope brushing is finished, intercepting ditches 11 are arranged on the top of the high filled slope and each platform 1, drainage ditches 13 are arranged at the bottom of the high filled slope, and upward and oblique drainage pipes 12 are arranged on the slope body of each level of slope.
Referring to fig. 2, when step S6 is performed, after the construction of brushing and excavating is completed, slope surface protection structures are arranged on the slope surfaces of the side slopes at all levels; wherein, the slope protection structure in step S6 is set as a three-dimensional geonet so as to limit the protection scope of the present application, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application. Grass seeds are sprayed on the upper part of the greening frame to achieve the greening effect; or the slope protection structure in the step S6 is set as a framework, and grass seeds are sprayed in the framework to achieve the greening effect.
Example 2:
referring to fig. 3, the difference from embodiment 1 is that the slope surface protection structure in step S6 is provided as an anchor rod, and the slope body can be reinforced as required.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (5)
1. A construction method for a soil-filling high slope is characterized by comprising the following steps:
s1, sequentially dividing the high slope from bottom to top into a slope toe arranged at the bottom, a first-stage slope, a second-stage slope … …, an nth-stage slope and a last-stage slope, wherein the lower end of each stage of slope is provided with a platform (1);
s2, preliminarily determining the height and slope rate of each grade of side slope and the width of the platform (1) according to the total height of the proposed high side slope;
s3, filling the side slope filling in layers, wherein after filling of each layer of side slope is completed, the filling can be tamped by dynamic compaction, and the filling work of the next layer of filling is continued after the filling and the dynamic compaction of the filling;
s4, carrying out in-situ test on the filled soil after dynamic compaction and tamping, and rechecking to determine the height and slope rate of each grade of side slope and the width of the platform;
s5, repeating the step S3, thereby completing the filling and tamping work of the slopes at all levels;
s6, excavating and brushing slopes on each level of side slope, and protecting the slope surface of each level of side slope after the slope brushing is finished;
in the step S4, the temporary tamping and filling slope surfaces at each level are 5m away from the edge of the platform (1) after the slope brushing, and the temporary tamping and filling slope surfaces are 5m away from the slope foot after the slope brushing, in the step S6, the slope brushing is performed sequentially from top to bottom, the slope brushing and the excavation are performed in a layered and segmented manner, and the layered thickness is determined according to the requirement of meeting the stability of the temporary side slope on site;
When the step S3 is performed, the layered thickness of each grade of side slope is controlled to be 5-6m, or the layered thickness of each grade of side slope is controlled to be 1/2 of the proposed height of each grade of side slope, and the dynamic compaction work of the step S3 includes the following steps:
a1, cleaning and leveling a construction site, marking the position of a tamping point for the first time, and measuring the ground elevation of the tamping point;
a2, positioning the rammer, lifting a lifting hook to a designed drop distance height, fixing a lifting hook traction steel wire rope, locking the drop distance, then stably lifting the rammer to a ramming point position, and measuring the ram top elevation before ramming;
a3, hoisting the rammer to a preset height, automatically unhooking the rammer and dropping the rammer to a ramming point, measuring the elevation of the top of the rammer, and recording the sinking amount of the rammer pit;
a4, repeating the step a3, and completing the tamping of one tamping point according to the designed tamping number and the control standard;
a5, shifting the rammer to the next ramming point, repeating the steps a 2-a 4, and completing the ramming of all the ramming points in the first time;
a6, filling or flattening the ramming pit by using a bulldozer, measuring the elevation of the field by using a square grid, and calculating the ramming amount of the field at the current time;
a7, after the specified pause time, completing all tamping passes according to the steps;
a8, after the intermission time is met, full ramming construction is carried out, soil is loosened on the surface layer of the field, dynamic ramming is carried out, and the elevation of the field after ramming is measured.
2. The method for constructing a filled-up high side slope according to claim 1, wherein when the step S2 is carried out, according to the total height of the high side slope to be filled up, firstly, the stability of the side slope to be filled up is calculated by adopting an empirical parameter of filling up after dynamic compaction through an arc sliding method, the height and slope ratio of each side slope and the width of each platform (1) are preliminarily determined, the height of each side slope is controlled to be 8-10m, the slope ratio is 1:1-1:1.5, the width of the platform (1) is 2-3m, after the field dynamic compaction test, the filling up is subjected to an in-situ test, the accurate shear strength index of the filled-up side slope is obtained, and the shear strength index is calculated through the stability checking calculation.
3. The earth-filling high slope construction method according to claim 1, wherein the a8 comprises the following steps:
b1, leveling the field, measuring the elevation of the field, and playing a full-compaction datum line;
b2, positioning the crane, and placing the rammer at the reference line end;
b3, tamping point by point according to the principle of tamping overlap 1/4 hammer diameter, completing the specified tamping number, temporarily setting as 3 tamping, tamping row by row, completing one-time full tamping, and measuring the elevation of the field by using a square grid;
b4, compacting the virtual soil layer by using a road roller on the ground after full compaction and leveling, and measuring the elevation of the ground by using a square grid.
4. The soil-filling high side slope construction method according to claim 1, wherein when the step S6 is performed, after the construction of brushing and excavating is completed, a three-dimensional geonet or skeleton is arranged on the slope surface of each side slope for vegetation greening.
5. The method as claimed in claim 1, wherein step S6 is performed by installing anchor rods on the slope surface of each slope after completing the construction of brushing and digging.
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| CN114439020A (en) * | 2022-01-10 | 2022-05-06 | 中冶华成(武汉)工程有限公司 | Dynamic compaction side slope and dynamic compaction side slope construction method |
| CN114575361A (en) * | 2022-03-25 | 2022-06-03 | 龙岩紫金山公园投资集团有限公司 | Filling slope anchor rod frame beam supporting method based on dynamic compaction reverse excavation treatment |
| CN116180735B (en) * | 2023-03-24 | 2023-09-22 | 郑州大学 | Method for closely knit reinforcement of soil slope by vibrating rod |
| CN116289922A (en) * | 2023-03-24 | 2023-06-23 | 中国电建集团成都勘测设计研究院有限公司 | Slope backfill compaction constraint device and method |
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| KR102179660B1 (en) * | 2019-05-27 | 2020-11-17 | (주)테르자기 | Slope reinforcing apparatus |
| CN111350104A (en) * | 2020-03-10 | 2020-06-30 | 中铁第六勘察设计院集团有限公司 | Construction method of high-speed railway excavation roadbed in deep artificial spoil area |
| CN113026715A (en) * | 2021-03-31 | 2021-06-25 | 中冶建工集团有限公司 | High-fill roadbed dynamic compaction construction method |
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