Roadbed cave filling treatment method
By drilling holes under the roadbed and injecting filling grout in stages, combined with the use of vibrators and water filtration devices, the problem of filling and compacting the voids in the seepage cavities was solved, achieving high load-bearing capacity and integrity maintenance, improving traffic safety and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-17
- Publication Date
- 2026-03-10
AI Technical Summary
Existing technologies struggle to achieve complete and compact filling of voids when dealing with seepage cavities in highway subgrades, resulting in insufficient load-bearing capacity and inadequate integrity, which affects traffic safety and maintenance costs.
The process involves drilling a combined borehole and a grouting borehole from the ground surface downwards, injecting filling slurry in stages, and then using a vibrator to compact the slurry and a filtration device to remove any oozing water. This forms the filling body of the grouting borehole and the combined borehole. UHPC filling material is used for the top layer of filling, and the combination of a vibrator and a filtration device ensures that the filling is dense.
It has achieved overall filling and compaction of seepage cavities under the roadbed, enabling it to withstand high loads and maintain sufficient integrity, reducing maintenance costs and manpower and material resources, and ensuring traffic safety.
Smart Images
Figure CN121629940A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of karst geological disease treatment, in particular to a filling treatment device and method for water seepage caves under a highway subgrade. BACKGROUND
[0002] In the construction process of a defective subgrade under complex cave conditions, the exposed complex cavity will cause potential damage to the integrity of the subgrade and pavement to varying degrees. During the contact with the surrounding environment, the cave surrounding rock will be continuously eroded under the combined action of physics and chemistry, and then gradually scale instability collapse. When the volume of the cave reaches a certain scale, it will cause large-scale subsidence, collapse and collapse of the subgrade, thereby causing significant harm to the traffic and safety of personnel. In order to ensure the safety and stability of the traffic facilities and the rational use of traffic resources, it is often necessary to fill and grout the subgrade containing the cave below, and to fill the cave below the subgrade in stages. At present, the method for treating the subgrade containing the cave below is to use high-proportion concrete materials for grouting treatment. Some caves are difficult to be filled densely at one time, and there will still be a part of the cavity that is not completely filled and dense, thereby causing certain negative effects on the subsequent use and maintenance. The subsequent treatment and maintenance will require a lot of manpower and material resources, and sometimes it is still difficult to achieve the desired effect.
[0003] Therefore, it is necessary to develop an effective filling mode for the cave below the subgrade. The filling material prepared by the materials such as the blasted excavation of the cutting, the tunneling stone, the machine-made sand and the river sand is injected into the cavity, so as to finally achieve the purpose of permanent subgrade reinforcement and maintenance. SUMMARY
[0004] (I) Technical problem to be solved In view of the above-mentioned shortcomings and deficiencies of the prior art, the present application provides a filling treatment device and method for water seepage caves under a highway subgrade, so as to solve the technical problems of the prior art. The cavity is filled and dense as a whole, can withstand a higher load and maintain sufficient integrity.
[0005] (II) Technical scheme In order to achieve the above-mentioned purpose, a subgrade cave filling treatment method of the present application comprises the following steps: S1, determining the highest position of the cave top meeting the preset conditions, drilling a vertical comprehensive drill hole and a grouting drill hole from the ground surface downward until the comprehensive drill hole and the grouting drill hole are communicated with the highest position of the cave cavity; S2, injecting filling slurry into the karst cavity space through the grouting borehole; inserting a vibrator, a vibrator cable, a water filtering device and a water suction pipe through the comprehensive borehole; wherein, after each injection of filling slurry, the vibrator is used for vibration compaction treatment, and the water filtering device and the water suction pipe are used to extract the exuded water in the karst cavity space, and then the next injection of filling slurry is performed after the filling slurry is preliminarily solidified and no exuded water is exuded; S3, after the grouting of the karst cavity space is completed, the comprehensive borehole and the grouting borehole are filled to form a grouting borehole filling body and a comprehensive borehole filling body.
[0006] Preferably, the step S3 further comprises: filling the topmost layer of the karst cavity with UHPC filling material.
[0007] Preferably, the thickness of the UHPC layer is 0.6-0.8 m; the grouting borehole filling body and the comprehensive borehole filling body are filled with UHPC filling material.
[0008] Preferably, the step further comprises a step of precipitating and filtering the extracted exuded water.
[0009] The application further provides a filling treatment device for a water seepage cave under a highway subgrade, which is used to implement the above-mentioned filling treatment method and comprises: a precipitation and purification assembly, a comprehensive borehole part, a grouting borehole part, a water pumping assembly, a vibration assembly and a grouting assembly; The water pumping assembly comprises a water filtering device, a water suction pipe and a water pump. The vibration assembly comprises a vibrator and a vibration cable. The water filtering device and the vibrator are arranged in the karst cavity space through the comprehensive borehole part, the water suction pipe and the vibration cable are connected with the water filtering device and the vibrator through the comprehensive borehole part, the water suction pipe is connected with the water pump to extract the exuded water in the karst cavity space, and the vibrator is connected with an external power supply. The grouting assembly comprises a mixing station and a grouting pipeline, the mixing station is used to prepare slurry, the grouting pipeline comprises a connecting end and a grouting end, the connecting end is connected with the mixing station, and the grouting end is inserted into the karst cavity space to fill the slurry into the karst cavity space.
[0010] Preferably, the comprehensive borehole part is reinforced by a wall protection sleeve, a sealing buckle plate integrated with a borehole is arranged at a borehole opening, a reinforced weight plate and a pipe insertion circular table are arranged, a water suction pipe insertion hole, an exhaust pipe insertion hole, a cable pipe insertion hole and an insertion hole rubber circular table are arranged on the pipe insertion circular table, and a water suction pipe elbow, an exhaust pipe, a cable pipe and a vibrator cable are arranged in the water suction pipe insertion hole, the exhaust pipe insertion hole, the cable pipe insertion hole and the insertion hole rubber circular table, respectively.
[0011] Preferably, the grouting drill hole part is reinforced by a wall protection sleeve, the mixed uniform filling slurry is filled along a filling main pipe, a filling branch pipe and a gate valve, and the empty area is filled.
[0012] Preferably, the vibrator is powered by a vibrator cable, the vibrator is fixed by reinforced tight wires, and a rubber rod is used to protect the vibrator from external impact.
[0013] Preferably, the water filtering device comprises steel wire filter cloth, and the exuded water enters the water suction pipe through the steel wire filter cloth and is then extracted to the external precipitation purification assembly.
[0014] Preferably, the precipitation purification assembly comprises a multi-stage precipitation tank and a clean water tank.
[0015] (Three) beneficial effects In the filling treatment device and method for a water seepage cave under a highway subgrade, the steps include: S1, determining the highest position of the cave top that meets the preset condition, drilling a vertical comprehensive drill hole and a grouting drill hole downward from the ground surface until the comprehensive drill hole and the grouting drill hole are communicated with the highest position of the cave empty area; S2, filling the filling slurry into the cave empty area through the grouting drill hole; the vibrator, the vibrator cable, the water filtering device and the water suction pipe are inserted through the comprehensive drill hole; wherein, after each filling of the filling slurry, the vibrator is used for vibration compaction treatment, and the exuded water in the cave empty area is extracted through the water filtering device and the water suction pipe, and then the next filling of the filling slurry is performed when the filling slurry is preliminarily solidified and no exuded water is exuded; S3, after the grouting of the cave empty area is completed, the comprehensive drill hole and the grouting drill hole are filled to form a grouting drill hole filling body and a comprehensive drill hole filling body. The abandoned block stones in earthwork excavation in highway engineering are processed into filling materials with a certain particle size gradation, the blocky filling materials are transported to the cave empty area through a pipeline for filling in batches, and the overall filling of the empty area is promoted to be dense, which can bear a high load and maintain sufficient integrity. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 The figure is a profile schematic diagram of the water seepage cave under the highway subgrade.
[0017] Figure 2 The figure is a profile schematic diagram of the water seepage cave under the highway subgrade. Figure 1 The figure is a construction structure schematic diagram of the filling treatment method for the cave empty area in the figure.
[0018] Figure 3 The figure is a construction structure schematic diagram of the filling treatment method for the cave empty area in the figure. Figure 2 The figure is an enlarged structure schematic diagram of the comprehensive drill hole part and the grouting drill hole part in the figure.
[0019] Figure 4 The figure is an enlarged structure schematic diagram of the comprehensive drill hole part and the grouting drill hole part in the figure. Figure 2An enlarged structural schematic view of the pumping assembly in the water pumping system.
[0020] Figure 5 As Figure 2 An enlarged structural schematic view of the vibration assembly in the vibration system.
[0021] Figure 6 As Figure 2 A first filling process schematic view of the filling treatment method in the water pumping system.
[0022] Figure 7 As Figure 2 An intermediate filling process schematic view of the filling treatment method in the water pumping system.
[0023] Figure 8 As Figure 2 A settlement slurry supplementing and roof filling process schematic view of the filling treatment method in the water pumping system. DETAILED DESCRIPTION
[0024] In order to better explain the present application, so as to be understood, the present application is described in detail below by specific embodiments, combined with the accompanying drawings.
[0025] It should be noted that all directional indications, such as up, down, left, right, front, back, etc., in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.
[0026] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0027] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; "connection" can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0028] Referring to Figures 1 to 8 , the present application provides a filling treatment method for a concealed karst cave under a highway subgrade, comprising the following steps: S1, determine the highest position of the top of the cave that meets the preset conditions, and drill vertical integrated borehole 32 and grouting borehole 43 from the ground surface downwards until the integrated borehole 32 and grouting borehole 43 are connected to the highest position of the cave cavity. S2, through the grouting borehole 43, filler grout is injected in stages into the cavity of the karst cave; through the integrated borehole 32, a vibrator 36, a vibrator cable 35, a water filter and a water suction pipe 10 are inserted; wherein, after each injection of filler grout, the vibrator 36 is used to compact it, and the water seepage in the cavity of the karst cave is extracted through the water filter and the water suction pipe 10, and then it is left to stand until the filler grout is initially solidified and no water seepage occurs, before the next injection of filler grout is carried out. S3, after the grouting in the karst cave is completed, the integrated borehole 32 and the grouting borehole 43 are filled to form the grouting borehole filling body 51 and the integrated borehole filling body 52.
[0029] Preferably, step S3 further includes filling the top layer of the cave with UHPC filling material.
[0030] Preferably, the thickness of the UHPC layer is 0.6–0.8 m; the grouting borehole filling body and the integrated borehole filling body are filled with UHPC filling material.
[0031] Preferably, the process also includes the steps of sedimentation and filtration of the extracted effluent.
[0032] The present invention also provides a filling treatment device for seepage cavities under highway subgrade for implementing the above-mentioned filling treatment method, comprising: a sedimentation and purification component, a comprehensive drilling section, a grouting drilling section, a pumping component, a vibration component, and a grouting component.
[0033] The water pumping assembly includes a water filter, a water suction pipe 10, and a water pump 9; The vibration assembly includes a vibrator 36 and a vibration cable 35. The water filtration device and the vibrator 36 are placed in the cave cavity through the integrated drilling section. The water suction pipe 10 and the vibration cable 35 pass through the integrated drilling section and are connected to the water filtration device and the vibrator 36. The water suction pipe 10 is connected to the water pump 9 to extract the oozing water in the cave cavity. The vibrator 36 is connected to an external power source. The grouting assembly includes a mixing station and a grouting pipeline. The mixing station is used to prepare grout, and the grouting pipeline includes a connecting end and a grouting end. The connecting end is connected to the mixing station, and the grouting end is inserted into the cavity of the karst cave to fill the cavity with grout.
[0034] Preferably, the integrated borehole 32 of the integrated drilling section is reinforced by a protective sleeve 30, and the borehole opening is provided with an integrated sealing plate 12, a reinforcing weight plate 13, and a tube insertion truncated cone 14. The tube insertion truncated cone 14 is provided with a water suction pipe insertion hole 15, an exhaust pipe insertion hole 17, a cable pipe insertion hole 19, and a rubber truncated cone 31 for installing a water suction pipe elbow 16, an exhaust pipe 18, a cable pipe 20, and a vibrator cable 11, respectively.
[0035] Preferably, the grouting borehole 43 of the grouting borehole is reinforced by the protective sleeve 56, and the uniformly mixed filling grout is used to fill the empty area along the filling main pipe 25, the filling main pipe 24, the gate valve 23, the filling branch pipe 22 and the gate valve 21.
[0036] Preferably, the vibrator 36 is powered by the vibrator cable 35, the vibrator 36 is securely fixed by the reinforcing wire 37, the rubber rod 38 covers the vibrator 36 to protect the vibrator 36 from external impact, and the sealing head is used to fix the rubber rod 38.
[0037] Preferably, the water filtration device includes a steel wire filter cloth 42, through which the effluent enters the suction pipe 9 and is then drawn out to an external sedimentation and purification component.
[0038] In a specific example, the above-ground part of the filling treatment device for seepage caves under the roadbed includes: a drainage pipe 1, a clear water pool 2, an upper edge of the clear water pool 3, a sedimentation tank liquid surface 4, a partition 5, turbid water from the cave 6, an upper edge of the sedimentation tank 7, a drainage pipe 8, a water pump 9, a suction pipe 10, a vibrator cable 11, a sealing plate 12, a reinforcing weight plate 13, a truncated cone for inserting the pipe 14, a suction pipe insertion hole 15, and a suction pipe elbow 16.
[0039] For the cavern empty area shown in Figure 1, a drilling rig is used to drill a comprehensive borehole 32 at the top of the cavern empty area. The function of the protective casing 30 is to prevent the borehole from collapsing. A clear water pool 2 is constructed on the surface. The upper edge 3 of the clear water pool is shown in the figure. The upper edge 7 of the constructed sedimentation pool is shown in the figure. The sedimentation pool is used to clarify the turbid water drawn from the cavern through the suction pipe 10, water pump 9, drainage pipe 8, and suction pipe 33 in sequence, as shown in Figure 6 of the cavern turbid water. The sedimentation pool is equipped with a secondary sedimentation pool 26, a fine slag sedimentation pool 27, a primary sedimentation pool 28, and a coarse slag sedimentation pool 29 to accelerate the dissolution of the cavern. The clarification speed of the turbid water is improved by the baffle 5 in the middle of the sedimentation tank, which promotes the clarification of the turbid water as soon as possible. The liquid level 4 in the sedimentation tank is shown in the figure. After the clarified water passes the water quality test, it is discharged through the drain pipe 1 and recycled. The comprehensive borehole 32 is reinforced by the protective sleeve 30. The borehole opening is equipped with a sealing plate 12, a reinforcing weight plate 13, and a pipe truncated cone 14. The pipe truncated cone 14 has a water suction pipe insertion hole 15, an exhaust pipe insertion hole 17, a cable pipe insertion hole 19, and a rubber truncated cone 31 for installing the water suction pipe elbow 16, the exhaust pipe 18, the cable pipe 20, and the vibrator cable 11, respectively.
[0040] At the top of the karst cave cavity, a drilling rig is used to drill grouting holes 43. The function of the wall-protecting sleeve 56 is to prevent hole collapse. After all the cavity devices are installed and the filling conditions are met, the uniformly mixed filling slurry can be poured along the filling main pipe 25, filling main pipe 24, gate valve 23, filling branch pipe 22, and gate valve 21 to fill the cavity. As the filling slurry falls, it gradually forms accumulation slopes 47 and 50. The water in the accumulation slopes separates and forms exudate 44. After the filling slurry 46 solidifies and hardens, it forms filling body 45 and corresponding filling bodies 49 in each part. Grouting holes The filling body consists of 51, 52, 53, 54, and 55. During the gradual filling process, air is gradually expelled from the vent pipe 34 as the slurry is added, preventing compressed air from blocking the material. The accumulated filling slurry gradually levels under the high-frequency vibration of the vibrator 36, which is powered by the vibrator cable 35 and securely fixed by the reinforcing wire 37. The rubber rod 38 protects the vibrator from external impacts and provides a certain buffering effect. The sealing head 39 is used to fix the rubber rod 38. To accelerate the consolidation and hardening process of the filling slurry, excess effluent is discharged in time through a filtration device. The effluent 48 seeps into the suction pipe through the steel wire filter cloth 42 and the filter holes 40, and is then pumped to the sedimentation tank by the ground pump 9. The filtration device is securely fixed by fasteners 41. This process enables the gradual filling of karst cave areas in the reinforcement of special roadbeds.
[0041] It should be understood that the above description of specific embodiments of the present invention is only for illustrating the technical approach and features of the present invention, and is intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of the present invention should be covered within the protection scope of the present invention.
Claims
1. A method of subgrade cavity fill treatment, characterized by, The method comprises the following steps: S1, determining the highest position of the cave roof meeting the preset condition, drilling a vertical comprehensive drill hole and a grouting drill hole from the ground downward until the comprehensive drill hole and the grouting drill hole communicate with the highest position of the cave empty area; S2, injecting filling slurry into the cave empty area through the grouting drill hole; inserting a vibrator, a vibrator cable, a water filtering device and a water suction pipe through the comprehensive drill hole; wherein, after each injection of filling slurry, the vibrator is used for vibration compaction treatment, the water filtering device and the water suction pipe are used for pumping out the exuded water in the cave empty area, then standing until the filling slurry is preliminarily solidified and no exuded water is exuded, and then the next injection of filling slurry is performed; S3, after the grouting of the cave empty area is completed, filling the comprehensive drill hole and the grouting drill hole to form a grouting drill hole filling body and a comprehensive drill hole filling body.
2. The filling process method according to claim 1, wherein The step S3 further comprises: filling the top layer of the cave with UHPC filling material.
3. The filling process method according to claim 2, wherein The thickness of the UHPC layer is 0.6-0.8 m; the grouting drill hole filling body and the comprehensive drill hole filling body are filled with UHPC filling material.
4. The filling process method according to claim 1, wherein The method further comprises a step of precipitating and filtering the pumped exuded water.
5. An apparatus for filling a water-permeable cavity under a highway embankment for implementing the filling process of any one of claims 1 to 4, characterized by, The method comprises: a precipitation purification assembly, a comprehensive drill hole part, a grouting drill hole part, a water pumping assembly, a vibration assembly and a grouting assembly; the water pumping assembly comprises a water filtering device, a water suction pipe and a water pump; the vibration assembly comprises a vibrator and a vibration cable; the water filtering device and the vibrator are arranged in the cave empty area through the comprehensive drill hole part, the water suction pipe and the vibration cable are connected with the water filtering device and the vibrator through the comprehensive drill hole part; the water suction pipe is connected with the water pump to pump out the exuded water in the cave empty area, and the vibrator is connected with an external power supply; the grouting assembly comprises a mixing station and a grouting pipeline, the mixing station is used to prepare slurry, the grouting pipeline comprises a connecting end and a grouting end, the connecting end is connected with the mixing station, and the grouting end is inserted into the cave empty area to fill the slurry into the cave empty area.
6. The filling treatment apparatus according to claim 5, wherein The comprehensive drill hole of the comprehensive drill hole part is reinforced by a wall protection sleeve, a sealing buckle plate integrated with a drill hole is arranged at a drill hole opening, a reinforced weight plate and a pipe insertion circular table are inserted, wherein a water suction pipe insertion hole, an exhaust pipe insertion hole, a cable pipe insertion hole and a rubber round table insertion hole are arranged on the pipe insertion circular table, and a water suction pipe elbow, an exhaust pipe, a cable pipe and a vibrator cable are arranged in the holes respectively.
7. The filling treatment apparatus according to claim 5, wherein The grouting drill hole of the grouting drill hole part is reinforced by a wall protection sleeve, and the mixed and uniform filling slurry fills the empty area through a filling main pipe, a filling branch pipe, a gate valve and a gate valve.
8. The filling processing apparatus according to claim 5, wherein The vibrator is powered by the vibrator cable, the vibrator is fixed by a reinforced tight wire, a rubber rod is wrapped around the vibrator to protect the vibrator from external impact, and a sealing head is used to fix the rubber rod.
9. The filling processing apparatus according to claim 5, wherein The water filtering device comprises a steel wire filter cloth, and the exuded water passes through the steel wire filter cloth and then enters the water suction pipe and is pumped out to an external precipitation purification assembly.
10. The filling processing apparatus according to claim 5, wherein The precipitation purification assembly comprises a multi-stage precipitation tank and a clean water tank.