CN111778793A - Cavity collapse prevention and control structure and construction method - Google Patents
Cavity collapse prevention and control structure and construction method Download PDFInfo
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- CN111778793A CN111778793A CN202010579862.XA CN202010579862A CN111778793A CN 111778793 A CN111778793 A CN 111778793A CN 202010579862 A CN202010579862 A CN 202010579862A CN 111778793 A CN111778793 A CN 111778793A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
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Abstract
The invention relates to a cavity collapse prevention and treatment structure and a construction method, wherein the prevention and treatment structure is erected above an underground cavity collapse area and comprises a geotextile laid above the underground cavity collapse area, a reinforced space body is arranged on the geotextile, the geotextile integrally wraps the reinforced space body to form a wrapping structure, and a plurality of pumping pipeline inlets are preset at the top end of the wrapping structure; the control structure also comprises a protective structure which is arranged above the wrapping structure; the reinforced space body comprises a geogrid and geocell chambers which are formed by staggered, overlapped and laid from bottom to top; the invention can not only prevent and treat the problem of cavity collapse of large span and small span, but also reduce the construction cost and has economical efficiency.
Description
Technical Field
The invention relates to a cavity collapse prevention and control structure and a construction method, and belongs to the technical field of geotechnical reinforcement and foundation treatment.
Background
The generation of the underground cavity comprises two factors of nature and/or human activities, the natural factors mostly occur in karst areas, for example, the limestone or dolomite bedrock is dissolved to form the underground cavity, and the loose soil stratum is easy to form the cavity under the conditions of underground water scouring and undermining; the human factors are mainly underground resource exploitation and underground engineering construction, and cavities are formed in the stratum. The existence of the underground cavity brings great potential safety hazards to engineering construction and operation, for example, the local subsidence of a lower lying soil body can cause the stretching damage of a geosynthetic material in the composite liner system to cause the failure of an anti-seepage function, thereby causing serious pollution to the surrounding environment; tunnel and mine tunnel cause huge life and economic loss due to collapse disaster; when a highway is constructed in a karst development area, roadbed destruction is caused by soil cave collapse, and local surface subsidence is induced to happen occasionally. At present, a plurality of karst soil hole treatment methods mainly comprise a filling method, a rigid body crossing method, a hole internal support method, a dynamic compaction method and the like, but the methods are all established on the basis of completely exploring the space distribution and the hydrogeological conditions of the karst soil holes, which is exactly the difficult way of the current karst soil hole exploration means; with the large-scale growth of infrastructure, structures such as roads are inevitably built on the ascertained holes or holes which may be formed after construction, so that the roads are always exposed to the risk of local collapse, which makes the traffic safety very challenging.
With the development of geosynthetics, because of convenient installation, short construction period, low engineering construction cost and limited influence on the environment, horizontal reinforcement methods are commonly used in road engineering at home and abroad to prevent or delay the sudden damage of roadbeds caused by cavity settlement. Geosynthetics such as geogrids, geonets and geotextiles can reinforce the top plate soil body above the cavity or the adjacent road subgrade, so that the differential settlement and the lateral deformation of the embankment are effectively reduced; when the soil layer of the top plate of the cavity is small in thickness and the span of the cavity is not large, the horizontal reinforcement body can prevent the embankment from collapsing; however, when the span of the lower horizontal cavity is large, the geosynthetic material is flexible and the anchoring length is insufficient, so that the reinforced body cannot completely prevent and control the deformation of the roadbed caused by the collapse of the cavity, but the settlement and instability of the roadbed are gradually evolved, so that the early warning effect can be achieved, and the occurrence of traffic accidents and the casualties of personnel can be reduced; the publication number CN109355992A, Chinese application entitled "karst region prevents suddenly and collapses the roadbed structure and construction method" discloses "karst consolidates the foundation surface layer and slots and inlays the reinforced concrete frame structure, the reinforced concrete frame structure is by the longitudinal beam that the horizontal interval sets up and the horizontal beam that the vertical interval sets up, and consolidate as an organic whole in the node where the longitudinal beam, horizontal beam meet, lay the high strength geotechnological material on consolidating the foundation surface, reinforced concrete frame structure top surface, set up the prefabricated pressure beam of the longitudinal extension above each longitudinal beam, the fixed rod that the vertical interval sets up is worn and prefabricated the pressure beam, the high strength geotechnological material is fixedly connected with the longitudinal beam, clamp it on the contact surface of the high strength geotechnological material and prefabricated pressure beam, vertical beam and fix; the Chinese application with the publication number CN 103628461A, namely a karst soil cave region roadbed horizontal stiffening treatment and collapse early warning device, discloses that a reinforced concrete lattice beam and a geogrid are used as a bearing structure of a karst soil cave region roadbed, the thickness of the lattice beam and the section of the lattice beam are designed according to the depth and the density of soil caves, the geogrids are laid on the upper side and the lower side of the reinforced concrete lattice beam, and when the karst soil cave sinks, the reinforced concrete lattice beam and the geogrid can still support the roadbed to prevent vehicles from falling into the cave; the two anti-collapse devices adopt a method that a reinforced concrete structure is used as a rigid body and is combined with a geosynthetic material to span the cavity, the reinforced concrete structure has higher manufacturing cost, if the reinforced concrete structure is used for preventing and treating soil bodies above the cavity with a proved large span, the reinforced concrete structure is valuable and not wasted, and a template needs to be erected during construction, so that the complexity is high and the construction period is long. Therefore, the method for preventing and treating the collapse of the large-span and small-span cavities is economically important, especially when the cavities are not detected or can be developed after work.
Disclosure of Invention
The invention provides a cavity collapse prevention and treatment structure and a construction method, which can prevent and treat the problem of large-span and small-span cavity collapse at the same time, reduce the construction cost and have economical efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a cavity collapse prevention and control structure is characterized in that the prevention and control structure is erected above an underground cavity collapse area;
the prevention and control structure comprises geotextile laid above an underground cavity collapse area, a reinforced space body is arranged on the geotextile, the geotextile integrally wraps the reinforced space body to form a wrapping structure, and a plurality of pumping pipeline inlets are preset at the top end of the wrapping structure;
the control structure also comprises a protective structure which is arranged above the wrapping structure;
the reinforced space body comprises a geogrid and geocell chambers which are formed by staggered, overlapped and laid from bottom to top;
as a further preferred aspect of the present invention,
the geogrid comprises a plurality of geogrid transverse ribs and a plurality of geogrid longitudinal ribs which are connected in a crisscross mode; the cross joints of the transverse ribs and the longitudinal ribs of the geogrid form cross joints, and reinforcing nodes are arranged on the surfaces of the cross joints or the bottom surfaces of the cross joints or the surfaces and the bottom surfaces of the cross joints;
as a further preferred aspect of the present invention,
the geocell comprises a plurality of wavy geocell strips, wherein the geocell strips are positioned on the same plane, and adjacent geocell strips are connected at a bent part;
as a further preferred aspect of the invention, a plurality of holes are uniformly formed on the geocell bar;
as a further preferable mode of the invention, the protective structure is a balloon, the surface of the balloon is in an arc-shaped structure, the bottom of the balloon is flat, and the balloon is attached to the top of the reinforced spatial body;
as a further preferred aspect of the present invention, a plurality of deformation acquisition alarm systems are installed at the bottom of the geotextile;
a construction method for a cavity collapse prevention structure based on any of the above claims, comprising the steps of:
the first step is as follows: manufacturing geogrids, namely fixedly connecting a plurality of geogrid transverse ribs and a plurality of geogrid longitudinal ribs in a crisscross manner to form the geogrids, and installing reinforcing nodes on the surfaces or the bottoms of cross-shaped intersection points or installing the reinforcing nodes on the surfaces and the bottom surfaces of the intersection points at the same time;
the second step is that: manufacturing a geocell, placing the surfaces of a plurality of wavy geocell strips vertical to the ground, arranging the plurality of geocell strips in parallel, and binding the bending parts of the adjacent geocell strips;
the third step: laying geotextile on the surface of the underground cavity collapse area, overlapping the geotextile in a staggered manner according to the sequence of geogrids and geocells, wherein the geogrids and the geocells are connected by binding, and the overlapped height meets the filling height and design requirements of the embankment;
the fourth step: after the geogrid and the geocell are overlapped in a staggered mode, a reinforced spatial body is formed, geotextile is wrapped around the reinforced spatial body, the top of the reinforced spatial body is sewn to form a wrapping structure, a plurality of pumping pipeline inlets are reserved at the top of the sewn wrapping structure, and a plurality of deformation acquisition alarm systems are installed at the bottom of the geotextile;
the fifth step: filling embankment filler around the reinforced space body until the filler reaches the top elevation of the reinforced space body, starting a pump to convey the flowing solidified waste mud to the reinforced space body, and forming a rigid body similar to the reinforced concrete beam by the solidified waste mud and the reinforced space body;
and a sixth step: placing a balloon at the top of the reinforced spatial body, enabling connecting pipelines on two sides of the balloon to extend out of an embankment side slope, then continuously filling embankment filler at the top of the balloon until the embankment filler reaches a design height, after a local cavity collapse area collapses, enabling the bottom of the geotextile wrapping layer to deform or tear, triggering a deformation acquisition alarm system, injecting liquid or gas into the balloon through a pipeline at the moment, and forming an arch shape on the surface of the balloon.
Through the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the reinforced space body and the solidified waste mud form a rigid body similar to a reinforced concrete beam, so that the crossing cavity can effectively prevent the subgrade from collapsing, and meanwhile, subgrade settlement and side slope deformation are reduced;
2. according to the geotextile, the reinforced space body is wrapped to form a prevention structure, so that the deformation of the reinforced space body is limited;
3. the geotextile can effectively prevent the waste mud from falling into the underground cavity;
4. according to the invention, the protective structure, namely the balloon is arranged at the top of the reinforcement space body, and when the whole prevention and treatment structure is deformed and torn, and the deformation acquisition alarm system is triggered, the balloon is subjected to secondary protection, so that the top load can be resisted.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic overall structure of a preferred embodiment of the present invention;
FIG. 2 is a side view of a structure of a reinforcement space body according to a preferred embodiment of the present invention;
fig. 3 is a schematic view of a geocell structure according to a preferred embodiment of the present invention;
fig. 4 is a schematic view of a geogrid structure according to a preferred embodiment of the present invention;
FIG. 5 is a schematic view of the preferred embodiment of the invention without the balloon bulging;
fig. 6 is a schematic diagram of the balloon bulge of the preferred embodiment of the present invention.
In the figure: the underground cavity collapse area is 1, the geotextile is 2, the geogrid is 3, the geocell is 4, the pipeline is 5, the balloon is 6, the crack is 7, the embankment filler is 8, the reinforcing node is 9, the geogrid transverse rib is 10, the geogrid longitudinal rib is 11, the geogrid strip is 12, the hole is 13, the deformation acquisition alarm system is 14, the waste mud is 15, and the pumping pipeline inlet is 16.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
In the existing technology for arranging the prevention structure in the underground cavity collapse area, a reinforced concrete structure rigid body or a geosynthetic material is adopted as a main body of the prevention structure, but when the span of a horizontal cavity is large, the geosynthetic material is flexible, and the reinforcement body cannot completely prevent and control the deformation of a roadbed caused by the collapse of the cavity; the reinforced concrete structure rigid body crossing method has good effect, but high cost, is valuable for preventing and treating the soil body above the explored large-span cavity, but is not economical, complex in construction and long in construction period for preventing and treating the soil body which is possibly developed into the cavity after construction or the cavity with smaller span.
Based on the defects, the application provides a cavity collapse prevention structure which is erected above an underground cavity collapse area 1; the whole structural characteristics of the control structure can be seen from fig. 1, including the geotextile 2 laid above the underground cavity collapse area 1, the reinforced space body is arranged on the geotextile 2, the reinforced space body is wrapped by the geotextile 2 at the same time, a plurality of pumping pipeline inlets 16 are preset after the top end of the geotextile is sewn, and the protective structure is arranged above the pumping pipeline inlets 16.
In this application, add muscle space body and include geogrid 3, geotechnological check room 4 and lay by crisscross stack from bottom to top and form.
Example 1:
in a preferred embodiment, the geogrid 3 is as shown in fig. 4, and includes a plurality of geogrid transverse ribs 10 and a plurality of geogrid longitudinal ribs 11, the geogrid transverse ribs 10 and geogrid longitudinal ribs 11 are bound according to a crisscross shape, in order to increase cross section friction and side resistance after stacking, reinforcing nodes 9 are installed at the crisscross cross intersection of the cross shape, and the reinforcing nodes 9 may be arranged on the surface of the intersection, also may be arranged at the bottom of the intersection, and also may be arranged on the surface and the bottom of the intersection at the same time;
as shown in fig. 3, the geocell 4 comprises a plurality of wavy geocells 12, the geocells 12 are located on the same plane, adjacent geocells 12 are connected at a bending position, and a plurality of holes 13 are formed in the surface of each geocell 12;
laying a layer of geotextile 2 on the surface of an underground cavity collapse area 1 which is already discovered or not discovered or can develop to form the underground cavity collapse area 1 after work, reserving enough length around the geotextile 2, sequentially laying geogrid, geocell 4, geogrid 3 and geocell 4 on the surface of the geotextile 2, namely alternately laying geogrid and geocell 4 on the surface of the geotextile 2, in the preferred embodiment, the geogrid is laid with four layers, the geocell 4 is laid with three layers, the geogrid 3 is arranged at the top, a reinforced spatial body is finally formed, the geotextile 2 wraps the spatial reinforced body, and the cavity collapse prevention structure provided by the preferred embodiment is finally formed; after the geotextile 2 wraps the reinforced space body, the deformation of the reinforced space body is limited, and even if the bottom of the reinforced space body is cracked in advance due to the collapse of a cavity, the geotextile 2 layer can prevent the waste mud 15 from falling into the cavity; meanwhile, the geotextile 2 is used for wrapping the reinforcement space body, the geotextile 2 can be used as a solid template, the sizing effect is achieved by injecting slurry into the reinforcement space body at the later stage for solidification, and cracking and deformation after the solidified slurry is subjected to a load effect are restrained.
The experimenter thinks here that along with the development of urban construction, in the projects such as cast-in-situ bored piles, underground continuous walls, pipe jacking projects, shield tunnels and the like, a large amount of waste mud 15 is inevitably generated, meanwhile, in China, a large amount of high-water-content dredged mud is generated in river channel dredging every year, the water content of the engineering waste mud 15 and the water content of the river channel dredged mud are both extremely high and are generally in a flow state, and therefore, the engineering waste mud and the river channel dredged mud all belong to the field of flow state mud; because the fluid mud has the characteristics of high water content and almost zero strength, the fluid mud cannot be directly used in engineering construction and belongs to waste; based on the phenomenon, the prevention and control structure erected above the underground cavity collapse area 1 is characterized in that as shown in fig. 2, after the top is sewn, pumping pipeline inlets 16 are reserved, the pumping pipeline inlets 16 are connected with a pipeline 5, and flowing solidified waste mud 15 is pumped into the prevention and control structure, a reinforced space body and the solidified waste mud 15 form a rigid body similar to a reinforced concrete beam, so that the roadbed collapse can be effectively prevented when the reinforced space body spans the cavity, and the reinforcement effect is achieved to reduce roadbed settlement and slope deformation; plant fibers can also be added into the flowing and solidifying waste mud 15, and pores are formed after the plants are corroded, so that the solidifying waste mud 15 has certain water permeability;
in the preferred embodiment, the vertical structure of the geocell 4 can play a role in restraining the solidified waste mud 15 and preventing the solidified waste mud from cracking prematurely, even if the solidified waste mud 15 cracks, the geogrid can play a role similar to a steel bar and continuously bear deformation caused by upper load, the multilayer grids and the multilayer cells form a multilayer protection function, and ground surface subsidence caused by underground cavity collapse is prevented; even if the solidified waste mud 15 above the underground cavity collapse area 1 is partially cracked to form cracks 7 and the geogrid layer is exposed, two ends of the geogrid layer are still anchored in the solidified waste mud 15, namely, the geogrid layer is fixedly connected, and the problem of overlarge deformation caused by insufficient interface friction between the geosynthetic material and the filler in the traditional horizontal reinforcement method can be solved.
A protective structure is also arranged above the wrapping structure, in the preferred embodiment, the protective structure is a balloon 6 structure, the balloon 6 structure is as shown in fig. 5 and 6, when the balloon 5 is not bulged, the bottom of the balloon is flat and is tightly attached to the wrapping structure, the surface of the balloon 6 is in an arc structure, connecting pipelines at two sides of the balloon 6 extend out of a embankment side slope, as can be seen from fig. 1, a plurality of deformation acquisition alarm systems 14 are arranged at the bottom of the geotextile 2, when the underground cavity collapse area 1 collapses, and the bottom of the geotextile 2 layer deforms and is torn, the deformation acquisition alarm systems 14 are triggered, at the moment, liquid or gas can be injected into the balloon 6 through the pipeline 5, the bottom of the balloon 6 is flat, the top of the balloon forms an arch structure as shown in fig. 6 at the moment, and has a layer of protection similar to the effect of a soil arch, can resist the upper load.
Example 2:
the construction method based on the arbitrary cavity collapse prevention structure specifically comprises the following steps:
the first step is as follows: manufacturing a geogrid 3, fixedly connecting a plurality of geogrid transverse ribs 10 and a plurality of geogrid longitudinal ribs 11 in a crisscross manner to form the geogrid, and installing reinforcing nodes 9 on the surface or the bottom of cross-shaped intersection points, or installing the reinforcing nodes 9 on the surface and the bottom of the intersection points at the same time;
the second step is that: manufacturing a geocell 4, placing the surfaces of a plurality of wavy geocell strips 12 vertical to the ground, arranging the plurality of geocell strips 12 in parallel, and binding the bent parts of the adjacent geocell strips 12;
the third step: the method comprises the following steps that geotextile 2 is laid on the surface of an underground cavity collapse area 1, the geotextile 2 is overlapped in a staggered mode according to the sequence of geogrids 3 and geocells 4, the geogrids 3 and the geocells 4 are connected through binding, and the overlapped height meets the filling height and design requirements of an embankment;
the fourth step: after the geogrid 3 and the geocell 4 are overlapped in a staggered mode, a reinforced space body is formed, the geotextile 2 is wrapped around the reinforced space body and is sewn at the top of the reinforced space body, a plurality of pumping pipeline inlets 16 are reserved at the sewn top, and a plurality of deformation acquisition alarm systems 14 are installed at the bottom of the geotextile 2;
the fifth step: filling embankment fillers 8 around the reinforced space body until the fillers reach the top elevation of the reinforced space body, starting a pump to convey the flowing and solidified waste mud 15 to the reinforced space body, and forming a rigid body similar to a reinforced concrete beam by the solidified waste mud 15 and the reinforced space body;
and a sixth step: placing a balloon 6 at the top of the reinforced spatial body, connecting pipelines at two sides of the balloon 6 extend out of an embankment side slope, then continuously filling embankment fillers 8 at the top of the balloon 6 until the design height is reached, after a local cavity collapse area 1 collapses, deforming or tearing the bottom of a geotextile 2 wrapping layer, triggering a deformation acquisition alarm system 14, and at the moment, injecting liquid or gas into the balloon 6 through a pipeline 5 to form an arch shape on the surface of the balloon 6; the embankment load on the upper part of the balloon 6 forms positive pressure, which is helpful for the water in the flowing and curing waste mud 15 to flow out of the permeable geotextile 2, so that the curing speed is accelerated and the strength is improved.
It should be noted that, when the waste mud 15 is injected into the reinforced space body, the mobile solidified waste mud 15 can be poured while filling the embankment filler 8, and the waste mud 15 can also be poured at one time after filling the peripheral filler, so that the construction is convenient, and the problem that the waste mud 15 is difficult to dispose is solved; through the prevention and cure structure that caves in that this application provided, not only low in cost, construction convenience can solve present solid waste processing's problem again simultaneously, has good environmental protection effect.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "and/or" as used herein is intended to include both the individual components or both.
The term "connected" as used herein may mean either a direct connection between components or an indirect connection between components via other components.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The utility model provides a cavity prevention and cure structure that collapses, includes the underground cavity district that collapses which characterized in that: erecting a prevention structure above the underground cavity collapse area;
the prevention and control structure comprises geotextile laid above an underground cavity collapse area, a reinforced space body is arranged on the geotextile, the geotextile integrally wraps the reinforced space body to form a wrapping structure, and a plurality of pumping pipeline inlets are preset at the top end of the wrapping structure;
the control structure also comprises a protective structure which is arranged above the wrapping structure;
the reinforced space body comprises a geogrid and geocell chambers which are formed by staggered, overlapped and laid from bottom to top.
2. The structure for preventing and treating cavity collapse according to claim 1, wherein:
the geogrid comprises a plurality of geogrid transverse ribs and a plurality of geogrid longitudinal ribs which are connected in a crisscross mode; the cross joints of the transverse ribs and the longitudinal ribs of the geogrid form cross joints, and reinforcing nodes are arranged on the surfaces of the cross joints or the bottom surfaces of the cross joints or the surfaces and the bottom surfaces of the cross joints.
3. The structure for preventing and treating cavity collapse according to claim 1, wherein:
the geocell comprises a plurality of wavy geocells, the geocells are located on the same plane, and adjacent geocells are connected at the bending position.
4. The structure for preventing and treating cavity collapse according to claim 3, wherein: and a plurality of holes are uniformly formed on the earthwork lattice bars.
5. The structure for preventing and treating cavity collapse according to claim 1, wherein: the protective structure is a balloon, the surface of the balloon is of an arc-shaped structure, the bottom of the balloon is flat, and the balloon is attached to the top of the reinforced spatial body.
6. The structure for preventing and treating cavity collapse according to claim 1, wherein: and a plurality of deformation acquisition alarm systems are arranged at the bottom of the geotextile.
7. A construction method of a cavity collapse prevention structure based on any of the above claims, characterized in that: the method specifically comprises the following steps:
the first step is as follows: manufacturing geogrids, namely fixedly connecting a plurality of geogrid transverse ribs and a plurality of geogrid longitudinal ribs in a crisscross manner to form the geogrids, and installing reinforcing nodes on the surfaces or the bottoms of cross-shaped intersection points or installing the reinforcing nodes on the surfaces and the bottom surfaces of the intersection points at the same time;
the second step is that: manufacturing a geocell, placing the surfaces of a plurality of wavy geocell strips vertical to the ground, arranging the plurality of geocell strips in parallel, and binding the bending parts of the adjacent geocell strips;
the third step: laying geotextile on the surface of the underground cavity collapse area, overlapping the geotextile in a staggered manner according to the sequence of geogrids and geocells, wherein the geogrids and the geocells are connected by binding, and the overlapped height meets the filling height and design requirements of the embankment;
the fourth step: after the geogrid and the geocell are overlapped in a staggered mode, a reinforced spatial body is formed, geotextile is wrapped around the reinforced spatial body, the top of the reinforced spatial body is sewn to form a wrapping structure, a plurality of pumping pipeline inlets are reserved at the top of the sewn wrapping structure, and a plurality of deformation acquisition alarm systems are installed at the bottom of the geotextile;
the fifth step: filling embankment filler around the reinforced space body until the filler reaches the top elevation of the reinforced space body, starting a pump to convey the flowing solidified waste mud to the reinforced space body, and forming a rigid body similar to the reinforced concrete beam by the solidified waste mud and the reinforced space body;
and a sixth step: placing a balloon at the top of the reinforced spatial body, enabling connecting pipelines on two sides of the balloon to extend out of an embankment side slope, then continuously filling embankment filler at the top of the balloon until the embankment filler reaches a design height, after a local cavity collapse area collapses, enabling the bottom of the geotextile wrapping layer to deform or tear, triggering a deformation acquisition alarm system, injecting liquid or gas into the balloon through a pipeline at the moment, and forming an arch shape on the surface of the balloon.
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| CN113744503A (en) * | 2021-08-31 | 2021-12-03 | 南京大学 | Distributed flexible edge intelligent early warning and forecasting system and method for karst ground collapse |
| CN113897832A (en) * | 2021-11-22 | 2022-01-07 | 长沙理工大学 | Repairing structure and repairing method for water damage of geogrid reverse-wrapping embankment |
| CN115114700A (en) * | 2022-05-24 | 2022-09-27 | 广州市交通设计研究院有限公司 | Urban road collapse prevention and control method |
| CN115595978A (en) * | 2021-12-06 | 2023-01-13 | 青岛地质工程勘察院（青岛地质勘查开发局）（Cn） | Method for repairing side slope empty bag in rock and soil treatment process |
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