CN114960551B - Processing method for local bank slope to generate superficial landslide - Google Patents
Processing method for local bank slope to generate superficial landslide Download PDFInfo
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- CN114960551B CN114960551B CN202210591675.2A CN202210591675A CN114960551B CN 114960551 B CN114960551 B CN 114960551B CN 202210591675 A CN202210591675 A CN 202210591675A CN 114960551 B CN114960551 B CN 114960551B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/10—Placing gravel or light material under water inasmuch as not provided for elsewhere
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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Abstract
The invention discloses a processing method of a shallow landslide generated by a local bank slope, comprising the following steps of firstly, cleaning a drum surface and a collapse surface of the bank slope; step two, the soft layer of the bank slope is cast and extruded to form silts; step three, grading crushed stone backfilling and rolling; step four, paving non-woven fabrics; step five, backfilling, rolling and slope finding the stone blocks; and step six, monitoring the slope surface of the bank slope. The method solves the problem that local landslide is caused by the water accumulation in the interlayer of the bank slope, can effectively stabilize the bank slope and filter the water accumulation in the interlayer, and has simple construction, high effect, low cost and preventive effect.
Description
Technical Field
The invention belongs to the field of revetment engineering, and particularly relates to a method for treating shallow landslide of a local bank slope.
Background
In order to reduce flood disasters caused by river channel flood in rainy seasons, comprehensive improvement of the river channel needs to be enhanced. In river channel renovation engineering, the stabilization effect and the anti-scouring effect of the bank slope are particularly important. When a river bank slope has a local sandy side slope, the river bank slope is flushed by river flood for a long time, river water permeates into the river bank slope to form interlayer ponding, and after water is returned in a flood season, the local river bank slope is leaked out due to the interlayer ponding, so that the side slope is easy to collapse. In order to solve the problem that local bank slopes generate superficial landslide, a scientific and effective treatment method does not exist at present.
Disclosure of Invention
The invention aims to provide a method for treating a local landslide, which solves the problem that the local landslide is caused by the accumulation of water in an interlayer of the local landslide, can effectively stabilize the accumulation of water in the interlayer of the local landslide, has the advantages of simple construction, high effect, low cost and preventive effect.
The technical scheme adopted by the invention is as follows:
a processing method for a local bank slope to generate a superficial landslide comprises the following steps:
step one, cleaning a drum surface and a collapse surface of a bank slope: before the treatment, steel sheet piles are arranged on the lower side water side of the landslide area, water intercepting ditches are arranged on the upper side of the landslide area, the water intercepting ditches extend to a river channel from two sides of the landslide area, and when the treatment is carried out, the drum surface is excavated, and the weak layer on the surface of the collapse surface is excavated to a certain depth;
step two, the soft layer of the bank slope is cast and extruded to form silts: squeezing the soft layer of the collapsed surface to a certain depth by using the stone blocks, and removing the squeezed redundant sludge;
step three, grading crushed stone backfilling and rolling: carrying out layered backfilling rolling on the collapsed surface to a certain depth by utilizing graded broken stone, and compacting by manually leveling and rolling after backfilling each layer;
step four, non-woven fabric laying: the non-woven fabric is paved on the collapsed surface in a bottom-up paving mode, and the non-woven fabric is fixed to prevent sliding;
fifthly, backfilling, rolling and slope finding the stone blocks: backfilling and rolling the collapsed surface layer by using the stones with different particle sizes, manually cleaning and caulking by using small stones after backfilling each layer of stones, compacting by rolling again, and leveling the slope after backfilling and rolling to the slope;
step six, monitoring a bank slope surface: and (3) inserting and fixing steel bars into holes of the slope concrete plant growth block, selecting steel bar interval cutting cross grooves with the same height as monitoring points, observing at intervals by a total station and a small prism, and comparing whether the monitoring points are displaced or not before and after the time so as to judge whether the slope has landslide or not.
Preferably, when the landslide area is close to a slope top pavement, a long-arm excavator is adopted to excavate a bulge surface, excavate a collapse surface downwards, throw stones and squeeze silts, graded broken stone backfill and block stone backfill on the slope top pavement; when the landslide area is far away from the road surface at the top of the slope, a digging machine is adopted to dig out the bulge surface, dig down the collapse surface, throw stones and squeeze silts, graded broken stone backfill and block stone backfill on the road surface at the top of the slope; compacting by adopting a small ramming machine after backfilling; the materials for throwing stones and squeezing silts, grading broken stone backfilling and block stone backfilling are transported to the road surface of the slope top by the excavator to be piled up before construction in each step.
Preferably, in the first step, the depth of the soft layer under the surface of the collapsed surface is not less than 1000mm; in the second step, the block stone with the grain diameter of 500-800mm is adopted to squeeze the siltation depth to be not less than 800mm; in the third step, the backfill depth of graded broken stone backfill is not less than 500mm; in step four, 200g/m was used 2 A nonwoven fabric; in the fifth step, the lower layer adopts the stone blocks with the grain diameter of 200-300mm, the middle layer adopts the stone blocks with the grain diameter of 500-800mm, and the upper layer adopts the stone blocks with the grain diameter of 100-200 mm.
Preferably, in the fourth step, the non-woven fabrics are smoothly and moderately tightly attached to the crushed stone surface during laying, the non-woven fabrics are fixed on the top of a slope and the bottom of the slope by adopting an anchoring groove, and the adjacent non-woven fabric blocks are spliced by adopting a seaming mode of 'overseam' or 'Ding Feng', so that the splicing width is not less than 1000mm.
Preferably, in step six, when the monitoring finds that the drill rod is displaced, immediately organizing constructors to set warning fence on the front side and the rear side of the drill rod displacement section, avoiding personnel from entering the dangerous area by mistake, and organizing machinery, materials and personnel to carry out landslide treatment.
The beneficial effects of the invention are as follows:
the method avoids the common loss of water and soil on the side slope by grading broken stone and filtering interlayer ponding by non-woven fabrics; according to the method, the soft soil layer is subjected to filling and siltation through backfill rolling of the stones with different particle sizes, so that a slope fixing effect is achieved; according to the method, the condition of the bank slope is known in time through monitoring the bank slope, and the deformed bank slope is repaired in advance, so that landslide injury is avoided; according to the method, the steel sheet piles are used for preventing the river water recharge and the continuous loss of water and soil on the side slope, and the surface water is timely discharged through the intercepting ditches, so that the river water is prevented from continuously entering a landslide area, and the subsequent construction is facilitated; the method solves the problem that local landslide is caused by the water accumulation in the interlayer of the bank slope, can effectively stabilize the bank slope and filter the water accumulation in the interlayer, and has simple construction, high effect, low cost and preventive effect.
Drawings
Fig. 1 is a flow chart of a process of a local bank slope generating a superficial landslide.
Fig. 2 is a schematic diagram (section) of a process of a superficial landslide generation of a local bank slope in an embodiment of the invention.
Fig. 3 is a schematic view (top view) of a treatment for a shallow landslide occurring in a local bank slope in an embodiment of the invention.
Fig. 4 is a schematic diagram of a bank slope monitoring in an embodiment of the invention.
In the figure: 1-a drumhead; 2-collapsing the surface; 3-excavating a surface; 4-steel sheet piles; 5-intercepting ditches; 6-a block stone for throwing stones and squeezing silts; 7-grading crushed stone; 8-non-woven fabrics; 9-lower layer block stones for block stone backfill; 10-middle layer stone block for stone block backfill; 11-upper layer stone block for stone block backfill; 12-steel drill rod.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1 to 4, a method for processing a shallow landslide generated by a local bank slope includes:
step one, cleaning a bank slope drum surface 1 and a collapse surface 2: before the treatment, a steel sheet pile 4 is arranged on the lower side water edge of the landslide area, a water intercepting ditch 5 is arranged on the upper side of the landslide area by at least 1.5m, the water intercepting ditches 5 extend to a river channel from two sides of the landslide area, and when the treatment is carried out, the drum surface 1 is excavated, and a weak layer on the surface of the collapsed surface 2 is excavated down to a certain depth;
step two, the soft layer of the bank slope is cast and extruded to form silts: squeezing the soft layer of the collapsed surface 2 to a certain depth by using the block stone 6, and removing the squeezed redundant sludge;
step three, backfilling and rolling graded broken stone 7: the graded broken stone 7 is utilized to carry out layered backfilling rolling with a certain depth on the collapsed surface 2, and each layer of backfilling is carried out by manual leveling and then rolling compaction;
step four, paving non-woven fabrics 8: the non-woven fabric 8 is paved on the collapsed surface 2 in a bottom-up paving mode, and the non-woven fabric 8 is fixed to prevent sliding;
fifthly, backfilling, rolling and slope finding the stone blocks: the method comprises the steps of carrying out layered backfill rolling on a collapsed surface 2 by using stones (9, 10 and 11) with different grain diameters, manually cleaning and caulking by using small stones after backfilling each layer of stones (9, 10 and 11), compacting by rolling again, carrying out slope leveling after backfilling and rolling to a slope, and carrying out the steps of: 3.5, slope finding is carried out;
step six, monitoring a bank slope surface: drill steel 12 is inserted into the holes of the slope concrete plant growth block, and 1:2 cement mortar is hardened and fixed, steel bars 12 with the same height are selected to be cut into cross grooves at intervals of about 5m to serve as monitoring points, the cross grooves are observed at intervals of a total station and a small prism, at least 2 times per week are observed, and whether displacement exists at the monitoring points in the front time and the rear time is compared to judge whether landslide occurs on a slope surface.
In the embodiment, when a landslide area is close to a slope top pavement, a long-arm excavator is adopted to excavate a lifting drum surface 1, a lower collapse surface 2, casting stones and squeezing silts, grading broken stone 7 backfilling and block stone (9, 10 and 11) backfilling on the slope top pavement; when the landslide area is far away from the road surface of the slope top, a digging machine is adopted to dig out the lifting drum surface 1, dig down the collapse surface 2, throw stones and squeeze silts, backfill graded broken stone 7 and backfill block stones (9, 10 and 11); compacting by adopting a small ramming machine after backfilling; the materials for throwing stones and squeezing silts, backfilling graded broken stones 7 and backfilling block stones (9, 10 and 11) are transported to the road surface at the top of the slope by a digging machine to be piled up before construction in each step.
In the embodiment, in the first step, the depth of the soft layer under the surface of the collapsed surface 2 is not less than 1000mm; in the second step, the depth of the block stone 6 extruded siltation with the grain diameter of 500-800mm is not less than 800mm; in the third step, the backfill depth of the graded broken stone 7 is not less than 500mm; in step four, 200g/m was used 2 A nonwoven fabric 8; in the fifth step, the lower layer adopts stone blocks 9 with the grain diameter of 200-300mm, and the middle layer adopts grainsThe stone block 10 with the diameter of 500-800mm is adopted as the upper layer, and the stone block 11 with the particle size of 100-200mm is adopted as the upper layer.
In the fourth embodiment, in the step, the non-woven fabric 8 is smoothly and moderately tightly attached to the crushed stone surface during laying, the non-woven fabric 8 is fixed at the top of a slope and the bottom of the slope by adopting an anchoring groove, and the adjacent non-woven fabric 8 blocks are spliced by adopting a seaming type of 'overseam' or 'Ding Feng', so that the splicing width is not less than 1000mm.
In the present embodiment, in step six, when the monitoring finds that the drill steel 12 is displaced, immediately organizing constructors to set warning barriers on the front side and the rear side of the displacement section of the drill steel 12, avoiding personnel from entering the dangerous area by mistake, and organizing machinery, materials and personnel to carry out landslide treatment.
The method filters interlayer ponding through graded broken stone 7 and non-woven fabric 8, so as to avoid the common loss of water and soil on the side slope; according to the method, the stones (9, 10 and 11) with different particle sizes are backfilled and rolled to play a role in occupying and squeezing silts on a weak soil layer, so that a slope fixing effect is achieved; according to the method, the condition of the bank slope is known in time through monitoring the bank slope, and the deformed bank slope is repaired in advance, so that landslide injury is avoided; according to the method, the steel sheet piles 4 are used for preventing river water recharging and continuous loss of water and soil on the side slope, and the water intercepting ditches 5 are used for timely draining surface water, so that the river water is prevented from continuously entering a landslide area, and subsequent construction is facilitated; the method solves the problem that local landslide is caused by the water accumulation in the interlayer of the bank slope, can effectively stabilize the bank slope and filter the water accumulation in the interlayer, and has simple construction, high effect, low cost and preventive effect.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (5)
1. A processing method for a local bank slope to generate a superficial landslide is characterized by comprising the following steps: comprising the steps of (a) a step of,
step one, cleaning a drum surface and a collapse surface of a bank slope: before the treatment, steel sheet piles are arranged on the lower side water side of the landslide area, water intercepting ditches are arranged on the upper side of the landslide area, the water intercepting ditches extend to a river channel from two sides of the landslide area, and when the treatment is carried out, the drum surface is excavated, and the weak layer on the surface of the collapse surface is excavated to a certain depth;
step two, the soft layer of the bank slope is cast and extruded to form silts: squeezing the soft layer of the collapsed surface to a certain depth by using the stone blocks, and removing the squeezed redundant sludge;
step three, grading crushed stone backfilling and rolling: carrying out layered backfilling rolling on the collapsed surface to a certain depth by utilizing graded broken stone, and compacting by manually leveling and rolling after backfilling each layer;
step four, non-woven fabric laying: the non-woven fabric is paved on the collapsed surface in a bottom-up paving mode, and the non-woven fabric is fixed to prevent sliding;
fifthly, backfilling, rolling and slope finding the stone blocks: backfilling and rolling the collapsed surface layer by using the stones with different particle sizes, manually cleaning and caulking by using small stones after backfilling each layer of stones, compacting by rolling again, and leveling the slope after backfilling and rolling to the slope;
step six, monitoring a bank slope surface: and (3) inserting and fixing steel bars into holes of the slope concrete plant growth block, selecting steel bar interval cutting cross grooves with the same height as monitoring points, observing at intervals by a total station and a small prism, and comparing whether the monitoring points are displaced or not before and after the time so as to judge whether the slope has landslide or not.
2. The method for treating the shallow landslide of the local bank slope according to claim 1, wherein the method comprises the following steps: when the landslide area is close to the road surface at the top of the slope, a long-arm excavator is adopted to excavate the bulge surface, dig the collapse surface downwards, throw stones and squeeze silts, graded broken stone backfill and block stone backfill on the road surface at the top of the slope; when the landslide area is far away from the road surface at the top of the slope, a digging machine is adopted to dig out the bulge surface, dig down the collapse surface, throw stones and squeeze silts, graded broken stone backfill and block stone backfill on the road surface at the top of the slope; compacting by adopting a small ramming machine after backfilling; the materials for throwing stones and squeezing silts, grading broken stone backfilling and block stone backfilling are transported to the road surface of the slope top by the excavator to be piled up before construction in each step.
3. The method for treating the shallow landslide of the local bank slope according to claim 1, wherein the method comprises the following steps: in the first step, the depth of the soft layer below the surface of the collapsed surface is not less than 1000mm; in the second step, the block stone with the grain diameter of 500-800mm is adopted to squeeze the siltation depth to be not less than 800mm; in the third step, the backfill depth of graded broken stone backfill is not less than 500mm; in step four, 200g/m was used 2 A nonwoven fabric; in the fifth step, the lower layer adopts the stone blocks with the grain diameter of 200-300mm, the middle layer adopts the stone blocks with the grain diameter of 500-800mm, and the upper layer adopts the stone blocks with the grain diameter of 100-200 mm.
4. The method for treating the shallow landslide of the local bank slope according to claim 1, wherein the method comprises the following steps: in the fourth step, the non-woven fabrics are smoothly and moderately tightly attached to the crushed stone surface during laying, the non-woven fabrics are fixed at the tops and the bottoms of the slopes by adopting anchoring grooves, and the adjacent non-woven fabric blocks are spliced by adopting a seaming mode of 'overseam' or 'Ding Feng', so that the splicing width is not less than 1000mm.
5. The method for treating the shallow landslide of the local bank slope according to claim 1, wherein the method comprises the following steps: in step six, when monitoring and finding that the drill rod is displaced, immediately organizing constructors and arranging warning surrounding barriers on the front side and the rear side of the drill rod displacement section, avoiding personnel from entering the dangerous area by mistake, and simultaneously organizing machinery, materials and personnel to carry out landslide treatment.
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| CN113624153A (en) * | 2021-07-30 | 2021-11-09 | 中国电建集团西北勘测设计研究院有限公司 | Large rock slope surface deformation monitoring method |
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