CN214832575U - Comprehensive three-dimensional drainage consolidation system for high-fill soft foundation construction - Google Patents
Comprehensive three-dimensional drainage consolidation system for high-fill soft foundation construction Download PDFInfo
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- CN214832575U CN214832575U CN202121398057.3U CN202121398057U CN214832575U CN 214832575 U CN214832575 U CN 214832575U CN 202121398057 U CN202121398057 U CN 202121398057U CN 214832575 U CN214832575 U CN 214832575U
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Abstract
The utility model belongs to the technical field of mountain area underground drainage construction, specifically a three-dimensional drainage consolidation system is synthesized in soft base construction of high fill. The drainage device comprises a main blind ditch arranged at the bottom of main gullies on two sides of a mountain, secondary blind ditches arranged at valley positions of the secondary gullies and a plurality of drainage branch blind ditches arranged at spring hole positions, wherein the main blind ditch and the secondary blind ditches are communicated with each other, the drainage branch blind ditches are respectively communicated with the main blind ditches or the secondary blind ditches, a plurality of vertically-arranged plastic drainage plates are arranged in regions where the main blind ditches and the secondary blind ditches are not communicated, a plurality of blind ditches are arranged in the regions, the blind ditches are respectively communicated with the main blind ditches or the secondary blind ditches, the plastic drainage plates are arranged in a sludge layer, the upper end and the lower end of each plastic drainage plate extend out of the sludge layer, a sand cushion layer is arranged on the upper side of the sludge layer, and a backfill layer is arranged on the upper side of the sand cushion layer, and a plurality of water collection wells are arranged in the backfill layer.
Description
Technical Field
The utility model belongs to the technical field of the newly-built field ground drainage construction in mountain area, specifically a three-dimensional drainage consolidation system is synthesized in mountain area high fill weak soil foundation construction.
Background
The soft soil is widely distributed in China, has the characteristics of poor engineering property, high water content, large pore ratio, high compressibility, low strength and the like, and has the characteristics of large settling volume, low bearing capacity, long consolidation completion time and the like in engineering. For a common soft soil foundation, the method adopts surcharge preloading for treatment under the condition of not tight construction period requirement, the bearing capacity of the treated foundation soil is improved, the foundation soil is settled after construction, and the engineering requirement can be met. And under the condition that the requirement for a construction period is tight, and the aspect of large-area deep silt foundation treatment in mountain areas is still in exploration, few engineering examples can be used for reference.
The settlement stability problem of the high fill construction of the field is a key problem in the engineering construction process; water is a key factor affecting high fill stability. The mountain filling site is mainly provided with exposed spring holes, underground water and bedrock fracture water, and for a general filling site, an underground blind ditch mode is adopted to discharge water out of a filling body, so that the stability of the filling body can be basically ensured. For the treatment of the deep soft soil foundation with high fill, the blind ditches are not enough to discharge the water seepage of the soft soil and the field area.
Along with the rapid development of the infrastructure construction of China, the number of filling areas in newly-built mountainous areas is continuously increased, particularly, the number of deep soft soil foundations in south China is increased, the requirement on the overall stability of filling bodies, particularly high-filling bodies is increased, and the original single blind ditch drainage system is not enough to meet the requirement of the high-filling areas on the deep soft soil foundations for draining underground water, surface water and penetrating into the pores of the filling bodies in an overall stable mode. Through a large amount of research and development, in the soft foundation high fill construction, the damage of water to the soft foundation high fill engineering is successfully solved from multiple angles by constructing a comprehensive three-dimensional drainage system.
Disclosure of Invention
The utility model discloses a to the soft base groundwater of high fill in field area, surface water, rainy season precipitation effectively dredge the discharge and fill the place, improve the intensity and the bearing capacity of foundation soil, reduce the soaking to the place, prevent that the ground from sinking, provide a three-dimensional drainage consolidation system is synthesized in soft base construction of high fill.
The utility model adopts the following technical proposal: a comprehensive three-dimensional drainage consolidation system for high-fill soft foundation construction comprises main blind ditches arranged at the bottoms of main gullies on two sides of a mountain, secondary blind ditches arranged at valley positions of the secondary gullies and a plurality of drainage branch blind ditches arranged at spring eyes, wherein the main blind ditches are communicated with the secondary blind ditches, the drainage branch blind ditches are communicated with the main blind ditches or the secondary blind ditches respectively, a plurality of vertically arranged plastic drainage plates are arranged in a region surrounded by the main blind ditches and the secondary blind ditches, a plurality of branch blind ditches are arranged in the region and are communicated with the main blind ditches or the secondary blind ditches respectively, the plastic drainage plates are arranged in a sludge layer, the lower ends of the plastic drainage plates extend into the sludge layer, sand cushion layers are arranged on the upper sides of the sludge layer and various blind ditches, a backfill layer is arranged on the upper side of the sand cushion layer, and a plurality of water collecting wells are arranged in the backfill layer.
Further, the plastic drainage plates are arranged in a square shape with a distribution pitch of 1m × 1 m.
Further, the water collecting wells are arranged at intervals of 30m × 50 m.
Furthermore, the gradient of the main blind ditch, the branch blind ditches and the secondary blind ditches is not less than 0.005, graded broken stones with the thickness of 20cm and the thickness of 1-3cm are paved at the bottom of the ditches, and 180 g/square meter non-woven geotextile is paved.
Furthermore, the sand cushion adopts medium coarse sand, the thickness is 0.5m, the thickness error is +/-5 cm, the mud content is not more than 5 percent, the dry density of the sand cushion is more than 1.5g/cm for carrying out thin film planting, and the permeability coefficient is more than 1 multiplied by 10-2cm/s。
Compared with the prior art, the utility model discloses following beneficial effect has:
1) the single preloading construction period is long, and the comprehensive drainage consolidation treatment is carried out by adopting the sand cushion layer, the plastic drainage plate, the blind ditch, the water collecting well and the preloading, so that the short plate is greatly solved, and the consolidation of the foundation is accelerated.
2) Through to the deep and thick soft soil layer in place, adopt sand bed course + plastics drain bar + french drain + sump pit + surcharge preloading to synthesize drainage consolidation and handle, guaranteed the overall stability of ground, reduce the post-construction settlement, the drainage consolidation degree reaches 99%.
3) By adopting the surcharge preloading plastic drainage plate to comprehensively treat the field, the strength and the compressibility of the soft soil foundation are effectively improved after the problems of high water content, large pore ratio, high compressibility and low strength of the soft soil layer are solved.
4) The main blind ditches are arranged along the bottoms of the main ditches on two sides of the mountain, the secondary blind ditches are arranged at the valley positions of the original secondary ditches, and the branch blind ditches are arranged in the plastic drainage plate area, so that the problem of rapid discharge of spring holes, crack water and preloading underground water in the field is solved.
5) The combined comprehensive drainage consolidation process for the treatment of the plastic drainage plate preloading + sand cushion layer + blind drain + water collecting well comprises the following steps: the plastic drainage plate and the water collecting well form a vertical drainage system, and the sand cushion layer forms a horizontal drainage system and is quickly drained through the blind ditch.
6) A 'blind ditch' drainage system in a combined comprehensive drainage system consists of a main blind ditch, a secondary blind ditch and branch blind ditches, wherein the branch blind ditches are arranged along the field drainage direction according to the length of 30m multiplied by 30m and are connected with the main blind ditch and the secondary blind ditches to form a rapid drainage system, and meanwhile, the rapid drainage system can be used as a long-term permanent drainage system.
Drawings
FIG. 1 is a cross-sectional view of a three-dimensional drainage system;
FIG. 2 is a schematic view of preloading;
fig. 3 is a floor plan of an embodiment of the present invention;
in the figure, 1-a main blind ditch, 2-a secondary blind ditch, 3-a drainage branch blind ditch, 4-a branch blind ditch, 5-a plastic drainage plate, 6-a sludge layer, 7-a backfill layer, 8-a water collecting well and 9-a sand cushion layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in figures 1 and 3, the comprehensive three-dimensional drainage consolidation system for high fill soft foundation construction comprises a main blind ditch 1 arranged along the bottoms of main gullies on two sides of a mountain, a secondary blind ditch 2 arranged at the valley position of the secondary gully and a plurality of drainage branch blind ditches 3 arranged at the spring eye positions, wherein the main blind ditch 1 is communicated with the secondary blind ditches 2, the drainage branch blind ditches 3 are respectively communicated with the main blind ditch 1 or the secondary blind ditches 2, a plurality of vertically arranged plastic drainage plates 5 are arranged in the area surrounded by the main blind ditch 1 and the secondary blind ditches 2, a plurality of branch blind ditches 4 are arranged in the area, the plurality of branch blind ditches 4 are respectively communicated with the main blind ditch 1 or the secondary blind ditches 2, the plastic drainage plates 5 are arranged in a sludge layer 6, the lower ends of the plastic drainage plates 5 extend into the sludge layer 6, a sand cushion layer 9 is arranged on the upper side of the sludge layer 6 and each blind ditch 1/2/3, a backfill layer 7 is arranged on the upper side of the sand cushion layer 9, a plurality of water collecting wells 8 are arranged in the backfill layer 7.
1. Blind ditches:
the slope of the main blind ditch, the branch blind ditches and the secondary blind ditches is not less than 0.5 per mill, and the blind ditches are introduced out of the water outlet of the filling body. The main blind ditch is 2m multiplied by 3.5m multiplied by 1.5m, and the branch \ secondary blind ditch is 1.2m multiplied by 2.4m multiplied by 1 m. And (3) paving graded broken stones with the thickness of 20cm and the thickness of 1-3cm at the bottom of the groove, and paving 180 g/square meter non-woven geotextile.
The groove body adopts the stone blocks with the grain diameter of 5-50cm, and the blind ditch material grading ensures that the porosity of the blind ditch is not less than 35 percent so as to ensure the water passing section.
2. Plastic drain board:
the SPB100-C type plastic drainage plate or the SPB-B type plastic drainage plate is adopted, the plastic drainage plate is arranged in a square mode with the distribution point interval of 1m multiplied by 1m, and the plastic drainage plate penetrates through the sludge layer by 50 cm.
3. Sand cushion layer:
the sand cushion adopts medium coarse sand (the content of fine sand in the sand material is not more than 25% by mass), the thickness is 0.5m, the thickness error is +/-5 cm, the content of mud is not more than 5% at most, the dry density of the sand cushion is more than 1.5g/cm during thin and long year, the permeability coefficient is more than 1x10-2cm/s. Before the sand cushion layer is laid, the surface of the field is suitable for slope treatment, the slope can be 0.005, and drainage is facilitated.
4. A water collecting well:
a water collecting well is arranged at a distance of 30m multiplied by 50m, a reinforcing cage with the diameter of phi 400 of the water collecting well is arranged at the bottom of the water collecting well, a reinforcing mesh with the diameter of 10cm multiplied by 10cm is arranged at the bottom of the water collecting well, the side wall hoop is arranged in the mode of phi 10@200, the vertical longitudinal ribs are arranged in the mode of 8 phi 14, and a finished product is processed in a reinforcing steel bar field.
The reinforcing cage is wrapped with 250 g/square meter non-woven water-permeable geotextile, and the lap joint length is not less than 20 cm. The woven geotextile should be tight and firm, double-row lines are overlapped when the non-woven water-permeable geotextile is laid, the geotextile is connected by overlock sewing, and the bottom of the water collecting well penetrates through the sand cushion layer and is buried in a soil body for 30 cm.
5. Preloading:
as shown in fig. 2, each level of the preloading of the surcharge is 2m, a method of backfill and rolling in layers is adopted, the thickness of backfill soil on each layer is less than or equal to 30cm, the preloading of the surcharge in the first stage is pushed flat by a bulldozer and is rolled for 3-4 times in a static load mode, and the surcharge in each later stage is pushed flat by a 25T vibratory roller and is rolled for 3-4 times.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (5)
1. The utility model provides a three-dimensional drainage consolidation system is synthesized in soft base construction of high fill which characterized in that: the method comprises the steps that a main blind ditch (1) is arranged at the bottom of a main ditch on two sides of a mountain, a secondary blind ditch (2) is arranged at the valley position of the secondary ditch, and a plurality of drainage branch blind ditches (3) are arranged at spring holes, the main blind ditch (1) is communicated with the secondary blind ditches (2), the drainage branch blind ditches (3) are respectively communicated with the main blind ditch (1) or the secondary blind ditches (2), a plurality of vertically arranged plastic drainage plates (5) are arranged in the area surrounded by the main blind ditch (1) and the secondary blind ditches (2), a plurality of blind ditches (4) are arranged in the area, the plastic drainage plates (5) are respectively communicated with the main blind ditch (1) or the secondary blind ditches (2), the lower ends of the plastic drainage plates (5) extend into a sludge layer (6), and sand cushions (9) are arranged on the upper sides of the sludge layer (896) and the three types of blind ditches (1/2/3), a backfill layer (7) is arranged on the upper side of the sand cushion layer (9), and a plurality of water collecting wells (8) are arranged in the backfill layer (7).
2. The comprehensive three-dimensional drainage consolidation system for high-fill soft foundation construction according to claim 1, characterized in that: the plastic drainage plates (5) are arranged in a square shape with the distribution point spacing of 1mX1 m.
3. The comprehensive three-dimensional drainage consolidation system for high-fill soft foundation construction according to claim 1, characterized in that: the water collecting wells (8) are arranged at intervals of 30m multiplied by 50 m.
4. The comprehensive three-dimensional drainage consolidation system for high-fill soft foundation construction according to claim 1, characterized in that: the slopes of the main blind ditches (1), the branch blind ditches (4) and the secondary blind ditches (2) are not less than 0.5 per thousand, graded broken stones with the thickness of 20cm and the thickness of 1-3cm are paved at the bottoms of the ditches, and 180 g/square meter non-woven geotextile is paved.
5. The comprehensive three-dimensional drainage consolidation system for high-fill soft foundation construction according to claim 1, characterized in that: the sand cushion layer (9) adopts medium coarse sand, the thickness is 0.5m, the thickness error is +/-5 cm, the mud content is not more than 5 percent, the dry density of the sand cushion layer is more than 1.5g/cm for carrying out thin film planting, and the permeability coefficient is more than 1x10-2cm/s。
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| CN202121398057.3U CN214832575U (en) | 2021-06-23 | 2021-06-23 | Comprehensive three-dimensional drainage consolidation system for high-fill soft foundation construction |
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| CN202121398057.3U CN214832575U (en) | 2021-06-23 | 2021-06-23 | Comprehensive three-dimensional drainage consolidation system for high-fill soft foundation construction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114531988A (en) * | 2022-03-23 | 2022-05-27 | 天津绿茵景观生态建设股份有限公司 | Desalination structure and desalination method for improving saline-alkali soil |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114531988A (en) * | 2022-03-23 | 2022-05-27 | 天津绿茵景观生态建设股份有限公司 | Desalination structure and desalination method for improving saline-alkali soil |
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