CN110761271A - Construction process for treating soft soil of roadbed by using riprap sludge squeezing method - Google Patents
Construction process for treating soft soil of roadbed by using riprap sludge squeezing method Download PDFInfo
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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
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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
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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Abstract
The invention discloses a construction process for treating roadbed soft soil by a rubble-throwing sludge-squeezing method, and particularly relates to the technical field of roadbed construction. According to the invention, through the structure design of the riprap sludge squeezing treatment, when the roadbed is treated by the riprap sludge squeezing method, the slope protection ridges prevent sludge from overflowing, so that the sludge enters the sludge collection groove from the flow passage opening and is discharged and collected through the sludge pump, the residual sludge is treated by using hydrated lime, and then the sludge is integrally filled and leveled, so that the hardening of soft soil is facilitated, the stability of the roadbed structure is further improved, compared with the prior art, the sludge treatment controllability is strong, the production cost is low, and the resources can be effectively utilized.
Description
Technical Field
The invention relates to the technical field of roadbed construction, in particular to a construction process for treating roadbed soft soil by a rubble silt squeezing method.
Background
The silt soil has the advantages of low strength, large compressibility, small permeability, low foundation bearing capacity, easy deformation and nonuniformity after loading, and large thixotropy and rheological property, and the silt soil needs to be treated if meeting the foundation soil in construction. The method for treating sludge soft soil foundation is a method for treating soft foundation by throwing stones and squeezing sludge, and belongs to the method for treating river alluvial deposit soft foundation such as sea phase, valley phase, lake and marsh phase, delta phase and the like.
A certain amount of broken stones are thrown from the middle part to the two sides of the roadbed bottom, sludge is extruded out of the roadbed range to improve the roadbed strength, the used broken stones are large stones which are not easy to weather, and the size is generally not less than 0.15 m. The method is often suitable for thick soft soil layers, water accumulation depressions such as lakes, ponds and rivers which accumulate water all year round and are difficult to drain, and the situations that the surface layer has no hard shell, the soft soil has large liquidity index and thin layer thickness, and the rubble can sink to a lying hard layer. Compared with other reinforcing methods, the rubble silt-throwing method is convenient and quick to construct, simple in process and quick in construction, is particularly suitable for areas where a large amount of accumulated water on the surface of a soft foundation cannot be drained and large-scale construction machinery cannot enter, and can effectively save construction cost and shorten construction period by adopting the rubble silt-throwing method to carry out soft foundation treatment under the conditions of abundant stones near the construction area and short transportation distance.
The invention patent of patent application publication No. CN 109914174A discloses a construction method for backfilling, riprapping and silt squeezing of a pond, which comprises the steps of selecting a central point N in the central area of the pond, respectively penetrating the central point N through three reference lines, wherein the included angles of the adjacent reference lines are 60 degrees, the two ends of all the reference lines and the edge of the pond form intersection points which are respectively intersection points A, B, C, D, E, F, respectively arranging a silt pumping pump at the positions of the intersection points A, B, C, D, E, F, and pumping away silt squeezed to the edge of the pond through six silt pumping pumps when stones are ripened in the pond.
However, when the construction method for backfilling, throwing and silt squeezing of the pond provided by the technical scheme is applied to treatment of soft soil of the roadbed, a large amount of silt overflows to influence construction of a construction site, and a plurality of silt pumps are required to be distributed on the outer side of the roadbed, so that cost waste is caused.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a construction process for treating soft soil of a roadbed by a rubble silt-expelling method, wherein by means of a rubble silt-expelling treatment structure design, when a roadbed belt is treated by the rubble silt-expelling method, slope protection ridges prevent silt from overflowing slopes, so that silt enters a silt collecting tank from a flow channel opening, is discharged and collected by a silt pumping pump, and is treated by slaked lime, and then is integrally filled and leveled, thereby facilitating the hardening of soft soil, further improving the stability of the roadbed structure.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a construction technology of roadbed soft soil is handled to crowded silt method of rubble, includes the crowded silt processing structure of rubble, the crowded silt processing structure of rubble includes the road bed area, the road bed area both sides all are equipped with the bank protection ridge, the bank protection ridge outside is equipped with the collection silt groove, the bank protection ridge gathers silt groove all with road bed area parallel distribution, the flow channel mouth has been seted up between bank protection ridge and the collection silt groove, the concrete operating procedure that adopts this structure to handle the roadbed soft soil does:
s1: excavating a road base band, removing hard substances on the surface layer of the roadbed, stirring sludge to keep the roadbed in a fluid state, and tamping and leveling the surface layer of the substrate of the road base band;
s2: excavating silt collecting grooves on two sides of a roadbed, banking excavated materials on two sides of a roadbed belt, hardening to form a slope protection ridge, and communicating the silt collecting grooves with the slope protection ridge to form a flow channel opening between the silt collecting grooves and the slope protection ridge;
s3: collecting stones and slaked lime for treatment, transporting the materials to a construction site, throwing the stones into a roadbed zone, extruding fluid sludge into a sludge collection groove from a flow passage port, and sealing the flow passage port after stone throwing is finished;
s4: mixing slaked lime in stone materials, putting the mixture into sludge, drying the sludge, and tempering the sludge clay;
s5: two sludge pumps are arranged at two ends of the sludge collecting groove to pump out fluid sludge, stone and hydrated lime are added into the sludge collecting groove after sludge is pumped out, and slope protection ridges are scattered and uniformly spread on the top surface of the roadbed belt and the sludge collecting groove after stone throwing and filling;
s6: spreading the lime soil again on the top of the uniformly spread roadbed belt and the silt collecting groove, and then flattening by using a road roller.
Preferably, the distance between the road base belt and the silt collecting groove is set to be 1-2m, and the width of the silt collecting groove is equal to that of the flow channel.
Preferably, the bottom surface of the flow channel opening is provided with an inclined surface, the top end of the flow channel opening is matched with the bottom of the roadbed belt, and the bottom end of the flow channel opening is arranged at 1/3-1/2 of the depth of the silt collecting groove.
Preferably, the number of the flow channel openings is set to be a plurality, the flow channel openings are uniformly distributed on two sides of the roadbed belt, the distance between every two adjacent flow channel openings is set to be 8-10m, and the flow channel openings on the two sides are distributed in a staggered mode.
Preferably, the stone material in S3 includes large and medium stones and small pieces of gravel, and the diameters of the large and medium stones and the small pieces of gravel are set to 10-20cm, 5-8cm and 1-3cm in this order.
Preferably, the hydrated lime is used in a mixture with the small pieces of gravel, and the volume ratio of the hydrated lime to the small pieces of gravel is set to 10:1 to 3.
Preferably, the fluid sludge in S5 is collected after being extracted, and is used as a building material after being aged and dried.
The invention has the technical effects and advantages that:
1. through the design of the riprap sludge-squeezing treatment structure, when the roadbed is treated by the riprap sludge-squeezing method, the slope protection ridges prevent sludge from overflowing, so that the sludge enters the sludge collection groove from the flow passage opening, is discharged and collected through the sludge pump, treats the residual sludge by using hydrated lime, and then integrally fills and levels, thereby being beneficial to hardening of soft soil and further improving the stability of the roadbed structure;
2. through ramming the road bed area substrate surface course and flattening the processing, and set up bold rubble, medium rubble and little grit, with bold rubble, medium rubble and little grit are laid from bottom to top in proper order, and mix the slaked lime in little grit, slake dry silt, building stones are packed in the silt under the crowded dense effect of replacement, form a new rubble structure, the settlement of structure has been reduced, the bearing capacity of soil matrix has been improved, because of building stones and the structure of silt matter clay are through the recombination, in addition building stones self good water permeability, make the ground can consolidation forming very fast, make overall structure intensity obtain very big improvement.
Drawings
FIG. 1 is a schematic view of the structure of the present invention for treating mud-dumping by rubble.
The reference signs are: the device comprises a base band 1, slope protection ridges 2, silt collecting grooves 3 and a flow passage opening 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the invention provides a construction process for treating roadbed soft soil by a rubble silt squeezing method as shown in figure 1, which comprises a rubble silt squeezing treatment structure, wherein the rubble silt squeezing treatment structure comprises a roadbed belt 1, both sides of the roadbed belt 1 are provided with slope protection ridges 2, the outer sides of the slope protection ridges 2 are provided with silt collecting grooves 3, the slope protection ridges 2 and the silt collecting grooves 3 are both distributed in parallel with the roadbed belt 1, a flow channel opening 4 is formed between the slope protection ridges 2 and the silt collecting grooves 3, and the concrete operation steps of treating the roadbed soft soil by adopting the structure are as follows:
s1: excavating a road base band 1, removing hard substances on the surface layer of a roadbed, stirring sludge to keep the roadbed in a fluid state, and tamping and leveling the surface layer of the base of the road base band 1;
s2: excavating silt collecting grooves 3 on two sides of a roadbed, setting the distance between a roadbed belt 1 and the silt collecting grooves 3 to be 1m, planting excavated materials on two sides of the roadbed belt 1, hardening to form slope protection ridges 2, communicating the silt collecting grooves 3 with the slope protection ridges 2 to form flow channel openings 4 between the silt collecting grooves 3 and the slope protection ridges 2, wherein the width of the silt collecting grooves 3 is equal to that of the flow channel openings 4;
the bottom surface of the flow channel opening 4 is provided with an inclined surface, the top end of the flow channel opening 4 is matched with the bottom of the roadbed belt 1, and the bottom end of the channel opening is arranged at 1/3 of the depth of the sludge collection groove 3, so that the drainage effect is good, and sludge is prevented from splashing and flowing back;
the number of the flow channel openings 4 is set to be multiple, the flow channel openings 4 are uniformly distributed on two sides of the roadbed strip 1, the distance between two adjacent flow channel openings 4 is set to be 8m, and the flow channel openings 4 on two sides are distributed in a staggered mode, so that fluid sludge can enter the sludge collecting groove 3 from the flow channel openings 4, and the fluid sludge is prevented from overflowing or blocking the flow channel openings 4;
s3: collecting stones and slaked lime for treatment, transporting the materials to a construction site, throwing the stones into the base band 1, extruding fluid sludge into the sludge collecting groove 3 from the flow passage opening 4, and sealing the flow passage opening 4 after the stone throwing is finished;
the stone material comprises large rubbles, medium rubbles and small pieces of gravels, and the diameters of the large rubbles, the medium rubbles and the small pieces of gravels are sequentially set to be 10cm, 5cm and 1 cm;
the hydrated lime and the small pieces of gravel are mixed for use, and the volume ratio of the hydrated lime to the small pieces of gravel is set to be 10: 1;
s4: slaked lime is mixed in stone and put into the sludge, the sludge is dried, sludge clay is tempered, the stone is filled into the sludge under the action of displacement and compaction, a new stone sheet structure is formed, the sedimentation of the structure is reduced, the bearing capacity of a soil foundation is improved, and the foundation can be quickly solidified and molded due to the recombination of the stone and the sludge clay structure and the good water permeability of the stone, so that the overall structural strength is greatly improved;
s5: two sludge pumps are arranged at two ends of the sludge collection groove 3 to pump out fluid sludge, the fluid sludge is collected after being pumped out, the fluid sludge is used as building materials after being cured and dried, stone materials and hydrated lime are added into the sludge collection groove 3 after the sludge is pumped out, and the slope protection ridges 2 are scattered after being filled with riprap and are uniformly spread on the top surfaces of the roadbed belt 1 and the sludge collection groove 3;
s6: spreading the lime soil again on the top of the uniformly spread road base belt 1 and the silt collecting groove 3, and then flattening by using a road roller.
The roadbed structure processed in the embodiment has uniform thickness, stable geology, compact structure and high integration degree, the roadbed hardness can meet the construction requirement, random sampling drilling detection and roadbed strength test are carried out on the roadbed in the embodiment, the result shows that the soft soil layer is fully processed after the roadbed is processed by the method provided by the embodiment, the bearing capacity COR value of the roadbed is 58%, the resilience modulus is 50Mpa, and the deflection value is 115.26/0.01 mm.
Example 2:
the invention provides a construction process for treating roadbed soft soil by a rubble silt squeezing method as shown in figure 1, which comprises a rubble silt squeezing treatment structure, wherein the rubble silt squeezing treatment structure comprises a roadbed belt 1, both sides of the roadbed belt 1 are provided with slope protection ridges 2, the outer sides of the slope protection ridges 2 are provided with silt collecting grooves 3, the slope protection ridges 2 and the silt collecting grooves 3 are both distributed in parallel with the roadbed belt 1, a flow channel opening 4 is formed between the slope protection ridges 2 and the silt collecting grooves 3, and the concrete operation steps of treating the roadbed soft soil by adopting the structure are as follows:
s1: excavating a road base band 1, removing hard substances on the surface layer of a roadbed, stirring sludge to keep the roadbed in a fluid state, and tamping and leveling the surface layer of the base of the road base band 1;
s2: excavating silt collecting grooves 3 on two sides of a roadbed, setting the distance between a roadbed belt 1 and the silt collecting grooves 3 to be 1.5m, planting excavated materials on two sides of the roadbed belt 1, hardening to form slope protection ridges 2, dredging the silt collecting grooves 3 and the slope protection ridges 2 to form flow channel openings 4 between the silt collecting grooves 3 and the slope protection ridges 2, wherein the width of the silt collecting grooves 3 is equal to that of the flow channel openings 4;
the bottom surface of the flow channel opening 4 is provided with an inclined surface, the top end of the flow channel opening 4 is matched with the bottom of the roadbed belt 1, and the bottom end of the channel opening is arranged at 2/5 of the depth of the sludge collection groove 3, so that the drainage effect is good, and sludge is prevented from splashing and flowing back;
the number of the flow channel openings 4 is set to be multiple, the flow channel openings 4 are uniformly distributed on two sides of the roadbed strip 1, the distance between two adjacent flow channel openings 4 is set to be 9m, and the flow channel openings 4 on two sides are distributed in a staggered mode, so that fluid sludge can enter the sludge collecting groove 3 from the flow channel openings 4, and the fluid sludge is prevented from overflowing or blocking the flow channel openings 4;
s3: collecting stones and slaked lime for treatment, transporting the materials to a construction site, throwing the stones into the base band 1, extruding fluid sludge into the sludge collecting groove 3 from the flow passage opening 4, and sealing the flow passage opening 4 after the stone throwing is finished;
the stone material comprises large rubbles, medium rubbles and small pieces of gravels, and the diameters of the large rubbles, the medium rubbles and the small pieces of gravels are sequentially set to be 15cm, 6cm and 2 cm;
the hydrated lime and the small pieces of gravel are mixed for use, and the volume ratio of the hydrated lime to the small pieces of gravel is set to be 10: 2;
s4: slaked lime is mixed in stone and put into the sludge, the sludge is dried, sludge clay is tempered, the stone is filled into the sludge under the action of displacement and compaction, a new stone sheet structure is formed, the sedimentation of the structure is reduced, the bearing capacity of a soil foundation is improved, and the foundation can be quickly solidified and molded due to the recombination of the stone and the sludge clay structure and the good water permeability of the stone, so that the overall structural strength is greatly improved;
s5: two sludge pumps are arranged at two ends of the sludge collection groove 3 to pump out fluid sludge, the fluid sludge is collected after being pumped out, the fluid sludge is used as building materials after being cured and dried, stone materials and hydrated lime are added into the sludge collection groove 3 after the sludge is pumped out, and the slope protection ridges 2 are scattered after being filled with riprap and are uniformly spread on the top surfaces of the roadbed belt 1 and the sludge collection groove 3;
s6: spreading the lime soil again on the top of the uniformly spread road base belt 1 and the silt collecting groove 3, and then flattening by using a road roller.
Comparative example 1, the roadbed structure thickness of handling in this embodiment is even, and geology is stable, and the structure is compact, and the integration degree is high, and roadbed hardness can reach the construction demand, carries out random sampling drilling detection and roadbed strength test to the roadbed in this embodiment in addition, and the result shows that the method that this embodiment provided handles the back soft soil layer and handles abundant the processing, and the bearing capacity COR value of roadbed is 66%, and modulus of resilience is 53 Mpa, and the deflection value is 108.74/0.01 mm.
Example 3:
the invention provides a construction process for treating roadbed soft soil by a rubble silt squeezing method as shown in figure 1, which comprises a rubble silt squeezing treatment structure, wherein the rubble silt squeezing treatment structure comprises a roadbed belt 1, both sides of the roadbed belt 1 are provided with slope protection ridges 2, the outer sides of the slope protection ridges 2 are provided with silt collecting grooves 3, the slope protection ridges 2 and the silt collecting grooves 3 are both distributed in parallel with the roadbed belt 1, a flow channel opening 4 is formed between the slope protection ridges 2 and the silt collecting grooves 3, and the concrete operation steps of treating the roadbed soft soil by adopting the structure are as follows:
s1: excavating a road base band 1, removing hard substances on the surface layer of a roadbed, stirring sludge to keep the roadbed in a fluid state, and tamping and leveling the surface layer of the base of the road base band 1;
s2: excavating silt collecting grooves 3 on two sides of a roadbed, setting the distance between a roadbed belt 1 and the silt collecting grooves 3 to be 2m, planting excavated materials on two sides of the roadbed belt 1, hardening to form slope protection ridges 2, communicating the silt collecting grooves 3 with the slope protection ridges 2 to form flow channel openings 4 between the silt collecting grooves 3 and the slope protection ridges 2, wherein the width of the silt collecting grooves 3 is equal to that of the flow channel openings 4;
the bottom surface of the flow channel opening 4 is provided with an inclined surface, the top end of the flow channel opening 4 is matched with the bottom of the roadbed belt 1, and the bottom end of the channel opening is arranged at 1/2 of the depth of the sludge collection groove 3, so that the drainage effect is good, and sludge is prevented from splashing and flowing back;
the number of the flow channel openings 4 is set to be multiple, the flow channel openings 4 are uniformly distributed on two sides of the roadbed strip 1, the distance between two adjacent flow channel openings 4 is set to be 10m, and the flow channel openings 4 on two sides are distributed in a staggered mode, so that fluid sludge can enter the sludge collecting groove 3 from the flow channel openings 4, and the fluid sludge is prevented from overflowing or blocking the flow channel openings 4;
s3: collecting stones and slaked lime for treatment, transporting the materials to a construction site, throwing the stones into the base band 1, extruding fluid sludge into the sludge collecting groove 3 from the flow passage opening 4, and sealing the flow passage opening 4 after the stone throwing is finished;
the stone material comprises large rubbles, medium rubbles and small pieces of gravels, and the diameters of the large rubbles, the medium rubbles and the small pieces of gravels are sequentially set to be 20cm, 8cm and 3 cm;
the hydrated lime and the small pieces of gravel are mixed for use, and the volume ratio of the hydrated lime to the small pieces of gravel is set to be 10: 3;
s4: slaked lime is mixed in stone and put into the sludge, the sludge is dried, sludge clay is tempered, the stone is filled into the sludge under the action of displacement and compaction, a new stone sheet structure is formed, the sedimentation of the structure is reduced, the bearing capacity of a soil foundation is improved, and the foundation can be quickly solidified and molded due to the recombination of the stone and the sludge clay structure and the good water permeability of the stone, so that the overall structural strength is greatly improved;
s5: two sludge pumps are arranged at two ends of the sludge collection groove 3 to pump out fluid sludge, the fluid sludge is collected after being pumped out, the fluid sludge is used as building materials after being cured and dried, stone materials and hydrated lime are added into the sludge collection groove 3 after the sludge is pumped out, and the slope protection ridges 2 are scattered after being filled with riprap and are uniformly spread on the top surfaces of the roadbed belt 1 and the sludge collection groove 3;
s6: spreading the lime soil again on the top of the uniformly spread road base belt 1 and the silt collecting groove 3, and then flattening by using a road roller.
Comparing embodiment 1 and 2, the roadbed structure thickness of handling in this embodiment is even, and the geology is stable, and the structure is compact, and the integration degree is high, and roadbed hardness can reach the construction demand, carries out random sampling drilling detection and roadbed strength test to the roadbed in this embodiment in addition, and the result shows that the method that this embodiment provided handles the back soft soil layer and handles abundant the processing, and the bearing capacity COR value of roadbed is 65%, and modulus of resilience is 52Mpa, and the deflection value is 110.85/0.01 mm.
The following table is obtained according to examples 1 to 3:
as can be seen from the above table, the proportion of raw materials is moderate in the embodiment 2, the structural design for processing the rubble and silt-squeezing treatment is most reasonable, the overall performance of the roadbed processed by the construction process is optimal, through the structural design for rubble and silt-squeezing treatment, when the roadbed belt 1 is processed by the rubble and silt-squeezing method, the slope protection ridges 2 prevent silt from overflowing, so that the silt enters the silt collecting groove 3 from the flow channel port 4 and is discharged and collected through the silt pump, the residual silt is processed by using hydrated lime, and then the overall filling and leveling are performed, thereby being beneficial to the hardening of soft soil, further improving the stability of the roadbed structure, and solving the problems of silt overflowing and resource waste in the existing rubble and silt-squeezing treatment technology;
through ramming the 1 basement top layer of way baseband and flattening the processing, and set up bold rubble, medium rubble and little grit, lay bold rubble, medium rubble and little grit from bottom to top in proper order, and mix the slaked lime in little grit, slake dry silt, building stones are packed in the silt under the crowded dense effect of replacement, form a new rubble structure, the settlement of structure has been reduced, the bearing capacity of soil matrix has been improved, because of building stones and the structure of silt matter clay are through the recombination, in addition building stones self good water permeability, make the ground can consolidation forming very fast, make overall structure intensity obtain very big improvement.
Finally, it should be noted that: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (7)
1. A construction process for treating roadbed soft soil by a rubble-throwing silt-squeezing method comprises a rubble-throwing silt-squeezing treatment structure, and is characterized in that: the crowded silt of throwing stone handles structure includes way baseband (1), way baseband (1) both sides all are equipped with bank protection ridge (2), bank protection ridge (2) outside is equipped with album silt groove (3), bank protection ridge (2) and collection silt groove (3) all with way baseband (1) parallel distribution, bank protection ridge (2) and collection silt groove (3) between seted up flow channel mouth (4), adopt this structure to handle the concrete operating procedure of road bed weak soil and do:
s1: excavating a road base belt (1), removing hard substances on the surface layer of the roadbed, stirring sludge to keep the road base belt in a fluid state, and tamping and leveling the surface layer of the road base belt (1);
s2: excavating silt collecting grooves (3) on two sides of a roadbed, banking excavated materials on two sides of a roadbed base band (1), hardening to form a slope protection ridge (2), and communicating the silt collecting grooves (3) with the slope protection ridge (2) to form a flow channel opening (4) between the silt collecting grooves (3) and the slope protection ridge (2);
s3: collecting stones and slaked lime for treatment, transporting the materials to a construction site, throwing the stones into a road base band (1), extruding fluid sludge to enter a sludge collecting groove (3) from a flow passage port (4), and sealing the flow passage port (4) after stone throwing is finished;
s4: mixing slaked lime in stone materials, putting the mixture into sludge, drying the sludge, and tempering the sludge clay;
s5: two sludge pumps are arranged at two ends of the sludge collecting tank (3) to pump out fluid sludge, stone and hydrated lime are added into the sludge collecting tank (3) after sludge is pumped out, and the slope protection ridges (2) are scattered after stone throwing and filling and are uniformly spread on the top surfaces of the roadbed belt (1) and the sludge collecting tank (3);
s6: spreading the lime soil again on the top of the uniformly spread road base belt (1) and the silt collecting groove (3), and then flattening by using a road roller.
2. The construction process for treating soft soil of a roadbed by the method of rubble silt squeezing according to claim 1, wherein the construction process comprises the following steps: the distance between the roadbed belt (1) and the silt collecting groove (3) is set to be 1-2m, and the width of the silt collecting groove (3) is equal to that of the flow channel opening (4).
3. The construction process for treating soft soil of a roadbed by the method of rubble silt squeezing according to claim 1, wherein the construction process comprises the following steps: the bottom surface of the flow channel opening (4) is arranged to be an inclined surface, the top end of the flow channel opening (4) is matched with the bottom of the roadbed belt (1), and the bottom end of the flow channel opening is arranged at 1/3-1/2 of the depth of the silt collecting groove (3).
4. The construction process for treating soft soil of a roadbed by the method of rubble silt squeezing according to claim 1, wherein the construction process comprises the following steps: the number of the flow channel openings (4) is set to be multiple, the flow channel openings (4) are uniformly distributed on two sides of the road base band (1), the distance between every two adjacent flow channel openings (4) is set to be 8-10m, and the flow channel openings (4) on the two sides are distributed in a staggered mode.
5. The construction process for treating soft soil of a roadbed by the method of rubble silt squeezing according to claim 1, wherein the construction process comprises the following steps: the stone material in the S3 comprises large and medium flakelets and small pieces of gravels, and the diameters of the large and medium flakelets and the small pieces of gravels are sequentially set to be 10-20cm, 5-8cm and 1-3 cm.
6. The construction process for treating soft soil of a roadbed by the method of rubble silt squeezing according to claim 5, wherein the construction process comprises the following steps: the hydrated lime is mixed with the small pieces of gravel for use, and the volume ratio of the hydrated lime to the small pieces of gravel is set to 10: 1-3.
7. The construction process for treating soft soil of a roadbed by the method of rubble silt squeezing according to claim 1, wherein the construction process comprises the following steps: and in the S5, the fluid sludge is collected after being extracted, and is used as a building material after being cured and dried.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111455969A (en) * | 2020-03-24 | 2020-07-28 | 中国五冶集团有限公司 | Super-thick peat soil and saturated silt foundation treatment method |
| CN112359890A (en) * | 2020-11-11 | 2021-02-12 | 中国电建集团华东勘测设计研究院有限公司 | Earth-rock dam foundation geological defect silt squeezing and filling changing treatment method |
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