277 results about "Cave" patented technology

The invention relates to the technical field of tunnel construction, and discloses a coal mine goaf karst tunnel construction method which comprises the following steps: S1, performing three-dimensional scanning on the axis and the periphery of a tunnel by adopting a high-frequency geological radar in combination with aerial survey of an unmanned aerial vehicle, and accurately positioning the boundary of a goaf, the development form of a karst cave and filler distribution; and S2, integrating a seismic wave reflection method, drilling and coring data and a geological sketch result, constructing a three-dimensional geological model, and dynamically predicting a potential water inrush and mud inrush risk area. According to the method, a high-frequency geological radar is combined with aerial survey of an unmanned aerial vehicle, three-dimensional scanning is conducted on the axis and the periphery of a tunnel, geological radar data, a point cloud model and tunnel design BIM are integrated, the boundary of a goaf (the error is smaller than or equal to 0.3 m) and the karst cave form are marked, and the collapse risk level is predicted based on rock mass mechanical parameters (compressive strength and fracture density) and hydrological data (seepage paths). Therefore, the method has the advantages of advanced detection, multi-source data fusion and the like, and the resolution of geological forecast is improved.

The invention belongs to the technical field of tunnels, and particularly relates to a treatment method for a building door tunnel penetrating a karst underground river reach, which comprises the following steps: step 1, multi-source geophysical prospecting fusion investigation: aiming at the tunnel karst underground river reach and the range of 500m around the tunnel karst underground river reach; the method comprises the following steps of: delineating a karst abnormal area by adopting semi-aviation transient electromagnetism; screening a strong corrosion area by adopting a depression analysis method; verifying parameters of the abnormal area through surface drilling and coring; identifying surface hydrology, lithology and seepage data characteristics through unmanned aerial vehicle-mounted high-resolution multispectral and thermal infrared cooperative remote sensing; karst water dynamic conditions including underground water flow velocity, flow direction and permeability coefficient, corrosion evolution characteristics including cavern forming time and expansion rate, and key physical and mechanical parameters including cavern filler porosity, permeability coefficient, surrounding rock integrity coefficient, uniaxial compressive strength, elastic modulus and Poisson's ratio are obtained. According to the treatment method for the building door tunnel to penetrate through the karst underground river section, the karst space characteristics are clearly presented through the arrangement of the treatment method for the building door tunnel to penetrate through the karst underground river section.

The invention provides a karst cave distribution detection method based on elastic wave CT and monitoring data fusion. The method comprises the steps that initial surrounding rock elastic wave characteristic data and geological data are collected to serve as basic data; periodically carrying out elastic wave CT detection to obtain dynamic wave velocity data of the surrounding rock, and collecting geological environment monitoring data and construction condition parameter data in real time; carrying out anti-interference processing on the elastic wave CT detection data and the monitoring data, and based on the processed elastic wave CT wave velocity data, extracting signal features of the karst cave through a feature recognition model; and fusing the processed elastic wave CT data, the synchronized monitoring data and the construction condition parameters, constructing a three-dimensional karst cave distribution model, and determining a karst cave distribution condition based on the constructed distribution model. According to the method, the propagation difference of the elastic waves in the karst cave and the surrounding rock medium is captured through the elastic wave CT, and accurate detection of karst cave distribution is achieved by combining monitoring data fusion optimization.

The invention discloses a retreating type segmented sleeve valve pipe grouting process for karst treatment, and belongs to the technical field of karst stratum reinforcement. The process comprises the steps of drilling construction, device arrangement, grouting positioning, segmented grouting, retreating type displacement grouting and ending treatment, and is characterized in that a grouting core pipe adopts a sealing telescopic connecting structure of an inner core pipe and an outer sleeve, and is matched with a telescopic driving piece, an elastic connecting piece and a first pressure sensor; dynamic adjustment of the size of a grouting space and real-time monitoring of pressure are achieved, and the risk of excessive or insufficient grouting is avoided in an intermittent grouting mode; the vent pipe and the one-way valve are staggered, pressure in the pipe is balanced, the one-way valve is assisted to rapidly retract, and backflow and slurry mixing are avoided; and the optional rotating device and the stirring piece cooperate to prevent slurry deposition, so that the grouting uniformity is improved. The grouting precision and controllability are remarkably improved, safety and stability of construction are comprehensively guaranteed, the grouting filling compactness and long-term stability are optimized, and the method is suitable for layering of karst caves in different forms.

The invention discloses a karst detection method based on blasting seismic wave component analysis. According to the method, based on the propagation characteristics of shear waves (transverse waves and S waves) in fluid, a blasting seismic source generated in the tunnel excavation process is used as an active signal source, existence of a karst cave area is preliminarily judged through multi-point synchronous monitoring and analysis of S wave energy proportion changes, arrival time difference, energy distribution and the like of P waves and S waves are analyzed according to the karst cave area, and the karst cave area is determined. The method achieves the recognition and judgment of the spatial distribution characteristics (including the position and the scale) of the karst cave, and finally obtains the specific moisture content of the karst cave in combination with a related theoretical calculation result, thereby achieving the accurate detection of the characteristics of the karst cave in a detection region. According to the method, an excitation source does not need to be additionally arranged, the detection process and conventional blasting construction can be carried out synchronously, and the method has the advantages of being few in measuring point arrangement, easy and convenient to implement, high in efficiency, accurate, small in calculation workload and the like and is suitable for karst detection and geological disaster early warning in the blasting construction period of tunnels such as water conservancy projects and traffic tunnels.

This invention discloses a snake-like robot and a cave exploration method based on the snake-like robot. The snake-like robot includes: multiple main body devices, multiple steering devices, a power drive device, and a remote control device. The multiple main body devices and multiple steering devices are staggered, and each steering device is rotatably connected to a main body device at both ends, forming the snake-like main body of the robot. The power drive device is communicatively connected to the remote control device and is used to receive motion commands sent by the remote control device and control the movement of the snake-like main body according to the motion commands. The remote control device is communicatively connected to the snake-like main body and is used to send data acquisition commands to the snake-like main body, control the snake-like main body to perform environmental exploration, and receive environmental exploration data returned by the snake-like main body. This invention solves the technical problems in the prior art where robots have difficulty entering and locating themselves in complex cave environments and can stably and efficiently carry out surrounding environment exploration tasks.

The invention belongs to the technical field of hydraulic tunnel construction, and discloses a supporting structure for collapse of surrounding rock above a hydraulic tunnel face and a construction method.The supporting structure comprises a blocking structure arranged in an excavated tunnel, and the blocking structure and a collapse body in the excavated tunnel are arranged in a spaced mode; a concrete plugging body structure is filled between the plugging structure and the collapse body; a grouting pipeline is arranged in the concrete plug body structure and extends into the mountain; the concrete plug body structure comprises a backfilling concrete plug and a pumping concrete plug. The backfill concrete plug is arranged between the collapse body and the plugging structure, and the pump concrete plug is arranged between the collapse body and a karst cave cavity in a mountain. According to the method, construction is easy and convenient, the collapsed surrounding rock above the tunnel face can be rapidly reinforced, the safety risk of tunnel roof collapse caused by continuous collapse of the surrounding rock is avoided, and the purpose of safe construction of the tunnel is achieved.

This invention discloses a mixing pile machine, belonging to the field of engineering machinery technology. The mixing pile machine uses a motor to drive a spherical shaft to rotate. The motor speed can be adjusted according to different actual conditions, thereby adjusting the speed of the mixing drill rod to adapt to mixing pile operations in rock caves with different geological conditions, improving the efficiency and quality of mixing pile construction. Compared to existing technologies that use a hydraulic structure to drive the mixing drill rod, this invention allows for adjustment of the mixing drill rod speed by adjusting the motor speed, avoiding the impact on construction efficiency or quality caused by the non-adjustable mixing drill rod speed. It can adapt to different geological conditions, improving the efficiency and quality of mixing pile construction.

The application provides a karst region foundation pit gushing water treatment and reinforcement method, wherein the gushing water treatment comprises the following specific steps: determining the position of a cave cavity in the foundation pit range; analyzing and evaluating the risk level of gushing water damage when the foundation pit is excavated to a preset depth and in the use stage of the foundation pit; vertically arranging a flow guide hole, the bottom end of the flow guide hole penetrating through the cave cavity, and a flow guide pipe being sleeved in the flow guide hole, and a water permeable hole being arranged on the side wall of the flow guide pipe in the cave cavity; fixing the flow guide pipe; vertically arranging a plurality of gravel filling holes communicating with the cave cavity, and inserting a flow meter for gushing water observation into the gravel filling hole; filling gravel into the cave cavity through the gravel filling hole; foundation pit excavation support and underground gushing water monitoring. The application can overcome the potential subsequent risk caused by plugging in the traditional karst cavity treatment, and improve the uplift and compression bearing capacity of the foundation pit.

This invention provides a multi-point decentralized underground engineering structure and design method for pumped storage power stations in karst areas, relating to the field of water conservancy and hydropower engineering technology. It includes upper and lower reservoirs arranged at varying elevations on a mountainside, connected by a water conveyance tunnel. The power plant of the pumped storage power station is functionally zoned and dispersed within the mountainside between the upper and lower reservoirs. The power plant includes several generator sets located on the water conveyance tunnel. The generator sets are connected to a access tunnel via shafts, which connects to the control center and serves as the entrance and exit for the power plant. This invention employs a multi-point decentralized layout strategy, subdividing the power plant into several smaller spaces, thus achieving flexibility in layout. This design helps avoid adverse geological conditions such as karst and caves; it not only reduces the difficulty and workload of seepage prevention treatment but also saves on project investment.

The invention provides an elastic wave CT (Computed Tomography) signal denoising method for improving the inversion precision of karst cave exploration, which belongs to the technical field of engineering exploration and comprises the following steps of: performing normalization preprocessing on a received signal, suppressing random noise by adaptive filtering, converting a time domain signal into an F-K domain and identifying a surface wave, filtering a surface wave signal by a Gaussian band elimination filter, and converting the F-K domain signal back to the time domain. The method comprises the following steps of: highlighting a take-off characteristic of a weak P wave covered by a strong surface wave through normalization; using a minimum mean square error adaptive filter to accurately filter random noise; subsequently converting to an F-K domain, and smoothly attenuating the surface wave through a Gaussian band elimination filter by utilizing the frequency wave number distribution difference of the surface wave and the P wave; the method realizes layered removal of random noise and surface waves, finally outputs high-purity direct P-wave signals, greatly improves P-wave travel time pickup and wave velocity calculation precision, and remarkably improves inversion precision of an elastic wave CT exploration method in detection of geologic bodies such as karst caves and fracture zones.

The utility model discloses a tube push bench multichannel grouting sealing tail shield for a karst cave stratum, which comprises a tail shield shell, a supporting table is arranged in the tail shield shell, a multichannel grouting tube, a grease tube and a port anti-seepage mechanism are arranged in the supporting table, the port anti-seepage mechanism comprises a placing groove, an electric telescopic rod, a sliding rod, a back shore and an anti-corrosion wear-resistant sealing ring, and the lower end of the grease tube is connected with a sealing brush. The multi-channel grouting pipes and the grease pipes are evenly distributed, an anti-seepage ring is arranged on a communicating hole in the front end of the containing groove, a sliding groove is formed in the supporting table, and a sealing ring groove is formed in the tail shield shell. By means of the structure, the multi-channel grouting pipe can effectively conduct grouting reinforcement on the karst cave stratum, the grease pipe is matched with the sealing brush to achieve sealing friction reduction, the end opening anti-seepage mechanism prevents mortar from seeping out, all the structures work cooperatively, the safety and reliability of the pipe jacking machine in karst cave stratum construction are remarkably improved, and it is guaranteed that construction is conducted smoothly.

The invention discloses a robot for detecting a narrow cave on a star catalogue, and belongs to the technical field of space robots. The defects that an existing star catalogue detection robot is large in size, complex in structure and incapable of adapting to narrow caves are overcome. The device comprises an advancing mechanism, a shell and a cave detection mechanism, and the shell is installed on the advancing mechanism and can be driven by the advancing mechanism to move; a mounting cabin is arranged at the front end of the shell, one end of the cave detection mechanism is mounted in the mounting cabin, the other end of the cave detection mechanism can extend out of or retract into the mounting cabin, and the cave detection mechanism can perform bending action so as to complete an omnidirectional detection task after the robot enters a narrow cave on a star catalogue. The method is mainly used for detecting the narrow caves on the star catalogue.

The tunnel lining reliability evaluation method considering space-time coupling provided by the application comprises the following steps: based on the target tunnel site geological survey data, a probability distribution model of a karst cave radius is established; based on the probability distribution model of the karst cave radius, a quantile sampling method is used to generate a plurality of karst cave radius samples; the karst cave radius samples are input into numerical simulation software to simulate and calculate the minimum principal stress value of the tunnel vault lining under different karst cave radii; based on the karst cave radius samples and the minimum principal stress, a function relationship fitting model between the karst cave radius and the minimum principal stress is established; based on the probability distribution model of the karst cave radius and the function relationship fitting model, a stress ratio probability distribution model is derived through a random variable function distribution conversion method; a strength degradation time-varying model of concrete under the action of freeze-thaw cycles under different stress ratios is established; based on the stress ratio probability distribution model and the strength degradation time-varying model, the marginal failure probability of the tunnel lining is calculated by coupling using a total probability formula.

The invention provides a salt cavern cavity building monitoring method, device and equipment and a storage medium, and the method comprises the steps: carrying out the sonar scanning measurement of a formed salt cavern cavity according to a sonar baseline, and obtaining the sonar reflection intensity data and cavity form data; wherein the sonar base line is obtained through pre-calibration before water injection and cavity construction are carried out on the target rock salt interval; acquiring real-time electromagnetic data of the target rock salt interval based on a wide-area electromagnetic method; according to the real-time electromagnetic data and the original formation resistivity background field data, the dissolution front edge and the dissolution state of the salt cavern cavity are determined; wherein the original formation resistivity background field data is obtained in advance based on a wide-area electromagnetic method before water injection and cavity construction are carried out on the target rock salt interval; and determining the stable state of the cavity form of the salt cavern cavity according to the sonar reflection intensity data, the original stratum resistivity background field data and the real-time electromagnetic data. According to the method, the dissolution front edge and the internal dissolution state of the salt cavern cavity can be determined more accurately.

This application belongs to the field of detection technology, specifically relating to an automatic construction method for a 3D model of a karst cave based on multi-source point cloud fusion, including: step S100, collaborative deployment of multi-source sensors at multiple boreholes and acquisition of raw detection data; step S200, preprocessing of single-bore detection data and extraction of karst cave spatial contour point cloud data; step S300, alignment and global fusion of the multi-bore point cloud constrained by control points, alignment and data fusion of the karst cave spatial contour point cloud data of all detection boreholes, and outputting a global karst cave point cloud and fusion quality signal; step S400, outputting a 3D mesh model of the karst cave or a message indicating insufficient fusion quality. This invention implements a three-level alignment and fusion strategy, achieving high registration accuracy at multiple boreholes. This invention effectively solves the error accumulation problem in multi-bore data fusion, ensuring uniform distribution of overall fusion accuracy, and is suitable for large-scale chain-like karst cave detection scenarios with a large number of chambers and boreholes.

This invention relates to the fields of tunnel engineering and geophysical exploration technology, specifically disclosing a method for full-domain strata perception using tunnel axial ground-penetrating radar (GPR). The method includes steps S101: establishing a geological model and performing radar forward modeling; S102: constructing a GPR image sample set and training anomaly recognition model; S103: performing energy feature analysis and establishing classification criteria for geological anomalies; S104: borehole GPR axial detection and data acquisition; and S105: spatial registration and geological anomaly early warning. This method comprehensively applies electromagnetic wave propagation theory, radar forward modeling, deep learning recognition algorithms, and RMS amplitude energy analysis technology. By drilling horizontal detection holes and deploying GPR along the tunnel axis, it achieves high-precision identification, classification, and risk visualization of the strata and geological anomalies (including boulders, karst caves, and debris) ahead of the tunnel, providing scientific geological safety decision support for tunnel excavation.

The invention relates to a diversion component and method for karst cave natural wind diversion control in a tunnel operation period, and belongs to the technical field of tunnel construction of tunnel engineering. The invention discloses a diversion component and method for diversion control of natural wind in a karst cave in a tunnel operation period, and the diversion component comprises a T-shaped diversion air pipe which comprises a rotatable outlet section, and an inlet section, a main pipe leading-out section and a branch pipe diversion section which are communicated with the rotatable outlet section, a split butterfly valve, a left arc-shaped wind shield, a right arc-shaped wind shield and a servo mechanism used for driving the wind shields to rotate are arranged in the rotatable outlet section, and the servo mechanism drives the left arc-shaped wind shield and the right arc-shaped wind shield to rotate in the rotatable outlet section. And the communication and closing states of the rotatable outlet section, the main pipe leading-out section and the branch pipe shunting section are adjusted. The tunnel karst cave natural wind is subjected to real-time multi-stage regulation and control, the ventilation efficiency is improved, and the acquisition cost of ventilation equipment is saved.

The application discloses a single-hole cluster test method, device and equipment for a water curtain hole of a cave depot and a storage medium, relates to the technical field of underground engineering and water sealing, and comprises the following steps: receiving a test instruction input by a user; when the test instruction is a single-hole water injection and backflow test instruction, sending a single-hole water injection and backflow test control signal to a programmable logic controller of a target water curtain hole through an OPC server, so as to perform single-hole water injection and backflow test and collect first test data; when the test instruction is a water curtain effectiveness test instruction, sending a water curtain effectiveness test control signal to programmable logic controllers of all water curtain holes through the OPC server, so as to perform water curtain effectiveness test on all water curtain holes and collect second test data; and obtaining a test result according to the first test data and the second test data. According to the application, remote data collection and test control of water curtain hole clusters can be realized without the need of personnel entering the cave depot, and the test efficiency and data accuracy are improved.

The application relates to a robot for exploring a narrow cave of a star table, belonging to the technical field of space robots. In order to solve the defects that the existing star table exploring robot is large in size, complex in structure and cannot adapt to narrow caves, the robot comprises a travelling mechanism, a shell and a cave exploring mechanism, the shell is installed on the travelling mechanism and can be driven to move by the travelling mechanism, the front end of the shell is provided with a mounting cabin, one end of the cave exploring mechanism is installed in the mounting cabin, the other end can be extended out of or retracted into the mounting cabin, and the cave exploring mechanism can perform a bending action to complete an omnidirectional exploration task after the robot enters the narrow cave of the star table. The robot is mainly used for exploring the narrow cave of the star table.

The embodiment of the invention provides a complex stratum karst cave volume calculation method and related equipment, and belongs to the technical field of geological survey. The method comprises the following steps: acquiring a geological profile map and a borehole histogram; performing information extraction on the drilling histogram to obtain drilling information of each drilling point location; performing structured processing according to the drilling information of all the drilling points to obtain an original stratum distribution table; performing elevation supplementation on the original formation distribution table according to the geological profile map to obtain a standard formation distribution table; based on the standard stratum distribution table, performing data splitting by taking each stratum as a derivation unit to obtain a plurality of stratum derivation tables; performing three-dimensional model reconstruction according to each stratum derivation table to obtain a stratum interface entity model of each stratum; performing target detection on all the stratum interface entity models according to a preset karst cave label to obtain a target karst cave model; and performing area attribute analysis on the target karst cave model to obtain the target karst cave volume, thereby improving the accuracy of karst cave volume calculation.

The application discloses a kind of system and method based on idle water tunnel to carry out compressed air energy storage, it is related to air energy storage technical field, including gas storage subsystem, it includes cave body, with the cave body is connected with spare warehouse by safety valve;With the air compression subsystem being connected with the gas storage subsystem;With the gas storage subsystem other side is connected with the power generation subsystem, it includes second heat exchanger, with the second heat exchanger output end is connected with second storage warehouse, with the second heat exchanger is connected with air expander, and with the air expander is connected with generator;And, power grid subsystem.The application can release the pressure inside cave body in time because of the use of spare warehouse, and can monitor the pressure in cave body in real time, prevent waste caused by excessive pressure release, and systematic calculation can ensure more accurate value, and does not need to judge by artificial experience in the past.

The invention relates to the technical field of surveying and mapping, in particular to a complex area intelligent surveying and mapping device which comprises a base body box, a square groove, a moving unit, a connecting unit, a transmission unit and a controller. According to the invention, the following problems in the surveying and mapping process of a complex area in the prior art can be solved: when encountering an obstacle, the obstacle cannot be effectively avoided, the normal operation of work is influenced, the adaptability is poor, and the cost is increased; parameters need to be set manually to measure a known surveying and mapping area, the method is only suitable for the known area, and for part of complex areas such as caves, surveying and mapping personnel cannot enter points to be measured, so that the caves cannot be surveyed and the unknown complex areas are difficult to surveyed and mapped, and limitation exists. Automatic advancing is achieved through mutual cooperation of the power assembly and the linkage assembly, the telescopic cylinders are controlled to contract upwards through the moving unit, the moving wheels are driven to move upwards, the robot can cross obstacles, jamming is avoided, adaptability is high, and the surveying and mapping effect and precision can be effectively improved.

This invention belongs to the field of pile foundation construction technology and discloses a construction method and pile foundation structure suitable for pile foundations where the pile hole encounters a karst cave. The construction method includes the following steps: S1, detecting the location and height of the karst cave in the pile hole; S2, providing a reinforcing cage and a sleeve, fixing the sleeve around the outside of the reinforcing cage, wherein the length of the sleeve is greater than the height of the karst cave, and the outer diameter of the sleeve is the same as the inner diameter of the pile hole; S3, lowering the reinforcing cage into the pile hole and sealing the karst cave with the sleeve; S4, pouring pile foundation concrete into the pile hole. This invention, by fixing a sleeve with an outer diameter matching the inner diameter of the pile hole and a length greater than the height of the karst cave around the outside of the reinforcing cage, and then sealing the karst cave when lowering the reinforcing cage into the pile hole, can effectively prevent concrete loss during subsequent pile foundation concrete pouring, forming a complete pile body. By constructing the sleeve only for the karst cave section, costs can be significantly reduced.

The invention discloses a low-frequency model construction method, device and equipment and a storage medium, and the method comprises the steps: determining a straight-plate low-frequency model and a seismic attribute body based on original geological data corresponding to a carbonate reservoir; performing post-stack inversion on the straight plate low-frequency model based on the original geological data, and determining a cave low-frequency model; based on the seismic attribute body, determining a fracture low-frequency model and a reservoir boundary low-frequency model; performing fusion processing on the straight plate low-frequency model, the cave low-frequency model, the crack low-frequency model and the reservoir boundary low-frequency model to obtain an original low-frequency model; and performing post-stack inversion on the original low-frequency model based on the original geological data, and determining a target low-frequency model corresponding to the carbonate reservoir. Through the technical scheme of the embodiment of the invention, automatic construction of the carbonate rock earthquake low-frequency model is realized, the carbonate rock earthquake low-frequency model can adapt to complex topographic changes of a carbonate rock reservoir, complex geologic features of the carbonate rock reservoir can be reflected, and comprehensiveness and accuracy of the low-frequency model are improved.

The invention discloses a deep cave type underground space volume capacity estimation method and system. According to the method, the resource quantity of the deep cave type underground space can be accurately and efficiently estimated. The system effectively overcomes the limitation of a single detection means through integrated detection, and remarkably improves the comprehensiveness and accuracy of data collection. The constructed three-dimensional geologic model can finely describe the spatial form and the internal structure of the complicated irregular cave, and the distribution rule of the complicated irregular cave can be visually revealed. And the adopted improved volume estimation algorithm can quickly and stably process complex point cloud data, finally high-precision calculation of the cave space capacity is realized, and a reliable basis is provided for resource evaluation, development and utilization.

The application provides a tunneling cave bypassing cave permanent and temporary combined detour structure and construction method, and belongs to the technical field of tunnel engineering. The structure comprises a bypassing cave which is communicated with a starting section at one end, and the other end of the bypassing cave extends to a terminal section after passing through the upstream of a cave, and a tunnel bottom box culvert which is communicated with the bypassing cave is arranged in the terminal section, the other end of the tunnel bottom box culvert is communicated with the downstream of the cave, a water passing hole is arranged on the side of the bypassing cave which faces the upstream of the cave, and a blocking part is arranged in the bypassing cave between the upstream of the cave and the starting section. The bypassing cave is arranged outside the cave as a temporary construction passage, a front tunnel construction working surface is opened, the interference between tunnel construction and cave exploration and treatment is reduced, the tunnel is ensured to be constructed safely and continuously, the construction period is ensured, the bypassing cave is used as a permanent drainage passage in the later period, the effective utilization of the project is ensured, the investment is reduced, the tunnel operation safety is ensured, and the structure has great practical significance and economic value.

The invention belongs to the field of geotechnical engineering, and provides a guiding type grouting structure and grouting method suitable for a karst cave cast-in-place pile. The guiding type grouting structure suitable for the karst cave cast-in-place pile comprises a plurality of pressure grouting pipes, a plurality of vacuum guiding pipes and a vacuumizing pump. The pressure grouting pipes and the vacuum guide pipes are arranged around a to-be-constructed pile position at intervals; each pressure grouting pipe is provided with a slurry pattern hole in the range of the karst cave, and each vacuum guide pipe comprises sub-pipes at different depth positions in the range of the karst cave; the pressure grouting pipe is used for injecting pressure grouting into cement paste or double-liquid grout, so that a high-pressure area is formed around the pressure grouting pipe; the vacuumizing pump is connected with the vacuum guide pipe and is used for extracting air in the karst cave, so that a low-pressure area is formed around the vacuum guide pipe; pressure difference is generated on the periphery of a to-be-built pile, and injected grout is guided to form a cemented solidified body on the periphery of the to-be-built pile according to the set direction by means of the physical characteristic that liquid pressure drives flowing.

The application discloses a kind of karst region meets filling soil cave to avoid type anti-seepage curtain structure, including the upper layer grouting hole, middle layer grouting hole and lower layer grouting hole being arranged in the area outside filling soil cave, the upper layer grouting hole is formed into first vertical curtain by drilling grouting downwards, the middle layer grouting hole is formed into first horizontal curtain by drilling grouting upstream, and second vertical curtain is formed by drilling grouting downwards, the lower layer grouting hole is formed into second horizontal curtain or annular curtain by drilling grouting around, and third vertical curtain is formed by drilling grouting downwards, wherein, first horizontal curtain and first vertical curtain overlap, and second horizontal curtain or annular curtain and second vertical curtain overlap.The application is convenient for construction, low investment, short construction period, high construction safety; the curtain formed by drilling grouting in the above grouting hole in rock mass, the anti-seepage material is uniform, the type is single, avoids the overlap of soil anti-seepage and rock mass anti-seepage, and improves the anti-seepage effect.