25 results about "Pebble" patented technology

The invention discloses a freezing design method for an inclined shaft freezing crossing strong permeable pebble bed, and particularly relates to the technical field of freezing method construction. Acquiring rock and soil parameters and regional historical environment temperature of a pebble bed of a crossing section of the target inclined shaft; establishing a three-dimensional inclined shaft geometric model, and determining the arrangement position, inclination angle and spacing of the freezing pipe along the axis of the inclined shaft; constructing a frozen region space model coupled with the pebble bed; the method comprises the following steps: constructing a freezing-heat transfer-seepage multi-field coupling model according to historical environment temperature and freezing pipe arrangement information, performing numerical simulation on a frozen body forming process, and obtaining an evolution function of a freezing boundary expansion range and a freezing thickness at different times; according to the method, multi-physical field coupling modeling and freezing body evolution accurate control of the freezing process can be achieved, and the method has the advantages of being high in predictability, uniform in freezing effect and the like and is particularly suitable for inclined shaft freezing design and construction under complex geological conditions.

This invention relates to the field of geotechnical drilling engineering technology, and discloses a method for drilling small-diameter deep wells, comprising the following steps: using a positive circulation drilling rig to prepare a mud system based on the laterite soil of the construction site; using a composite reinforced roller cone bit for drilling operations in pebble layers; using a semi-automatic pulley system to connect or disconnect drill rods; using a positive circulation drilling rig to perform a segmented lifting and scraping wall composite process for drilling, in which a hole guide tool is used for scraping the wall; determining the depth of the aquifer before lowering the well casing; completing the butt joint connection of the well casing by welding, and completing the lowering and installation of the well casing; after the well casing is installed, sequentially performing mud replacement, air compressor agitation and well washing, and simultaneously completing the symmetrical backfilling of filter material; conducting a pumping test to complete the well completion quality acceptance. This invention can significantly improve drilling efficiency, well completion quality, and construction safety in complex pebble formations, while effectively reducing construction costs.

The invention provides a drilling and grouting integrated drilling and grouting method which comprises the steps that firstly, the stratum type of a to-be-drilled area is detected, and the stratum type comprises at least one of an underground water-free area, an unpebble area below underground water and a pebble area below the underground water; secondly, according to the target depth of the to-be-drilled area, segmented drilling is conducted on the to-be-drilled area, wall protection treatment is conducted on the hole wall synchronously according to the stratum type so as to prevent the hole wall from collapsing or underground water leakage, and wall protection treatment comprises water injection wall protection or modified water glass injection wall protection; and finally, after the segmented drilling reaches the target depth, retreating grouting is carried out.

The invention relates to the technical field of geotechnical engineering and foundation construction, in particular to a perturbation-grabbing-suction linkage reverse circulation drilling cobble rapid obstacle removing device and a perturbation-grabbing-suction linkage reverse circulation drilling cobble rapid obstacle removing method. The device comprises an upper linkage mechanism installed at the bottom of a hollow drill rod, a multi-finger clamping mechanism, a disturbance rocker arm assembly, a reverse circulation suction and discharge channel and a control and communication unit. The control and communication unit receives torque and negative pressure signals, after a pebble jamming event is recognized, the disturbance rocker arm assembly is automatically controlled to loosen pebbles, the multi-finger clamping mechanism clamps and locks the pebbles, meanwhile, negative pressure is instantly enhanced, the pebbles are sucked out of a drill hole through the reverse circulation suction and exhaust channel, and finally drilling is recovered. According to the method, online recognition and integrated rapid removal of the cobblestones are achieved, the drill jamming risk and the hole wall instability possibility are remarkably reduced, the obstacle removal efficiency and the pile forming quality are improved, and the method is suitable for bored pile construction of the sandy cobble stratum.

The invention discloses an underwater pebble covering layer drilling method which comprises the following steps that S1, a variable-diameter casing pipe is pressed into water in a hydraulic pressing-in mode, the bottom of the variable-diameter casing pipe penetrates through a pebble layer and abuts against underwater rock, and the variable-diameter casing pipe comprises a large casing pipe body and a small casing pipe body which are connected with each other; s2, a drill rod is inserted into the variable-diameter casing pipe, and the drill rod is started; and S3, firstly crushing the cobblestones by the drill rod, and then drilling holes in the underwater rock. The variable-diameter casing pipe can penetrate through a cobblestone layer through hydraulic pressing, and the problem that a traditional casing pipe is difficult to penetrate through the cobblestone layer is solved. The large sleeve and the small sleeve form the variable-diameter sleeve, when the variable-diameter sleeve is lowered, the influence of water flow on the large sleeve is small, when the small sleeve penetrates through the cobblestone layer, the diameter of the small sleeve is smaller, the small sleeve can be inserted into the cobblestone layer more easily, the junction of the small sleeve and the large sleeve is in smooth transition, and the large sleeve can be inserted into the cobblestone layer along with the small sleeve conveniently. The small casing pipe is more attached to the drill rod, accurate guiding is conveniently provided for the drill rod, and work of the drill rod is facilitated.

The utility model relates to the technical field of tunnel construction, in particular to a crusher and a heading machine comprising the same, and the crusher comprises a feeding cabin, a crushing mechanism and a discharging cabin which are connected in sequence; the crushing mechanism comprises a first-stage crushing mechanism and a second-stage crushing mechanism which are connected in sequence, the first-stage crushing mechanism is connected with the feeding cabin, and the second-stage crushing mechanism is connected with the discharging cabin; the secondary crushing mechanism comprises at least two groups of single-tooth roller structures, and a flow guide block is arranged above a channel between the two groups of single-tooth roller structures; and a discharging hole of the discharging cabin is connected with a discharging and slurry discharging pipe. According to the crusher provided by the utility model, coarse crushing is carried out on large-particle-size slag stones through the first-stage crushing mechanism, fine crushing is carried out through the second-stage crushing mechanism, and two-stage crushing operation is carried out, so that the requirement of a special stratum which contains a large number of large boulders and is rich in sandy cobbles on the particle size of the crushed slag stones is met, and stagnant discharge is avoided; at least two groups of single-tooth roller structures are adopted to crush slag stones and sundries, so that the crushing efficiency is high, and the requirement of the shield tunneling machine on the tunneling efficiency is met.

The drill bit device of the pebble bed geological pile driver comprises a drill bit rod body, and spiral blades are arranged on the peripheral side of the drill bit rod body; guide teeth are arranged at the drilling end of the drill bit rod body, a plurality of cutting drill bits are arranged at the drilling end of the spiral blade, and the cutting drill bits are sequentially arranged in the width direction of the spiral blade. The guide teeth are double-separate-head combined guide teeth, and the cutting drill bit is obliquely arranged; in the drilling direction, the height of the guide teeth is larger than that of the cutting drill bit. The drilling difficulty of the pebble bed geological drilling machine is solved, the construction progress is accelerated, the damage of the drilling machine is reduced, and the energy consumption is reduced.

The invention discloses high-pressure jet grouting pile equipment for a sedimentary rock pebble bed and a construction method of the high-pressure jet grouting pile equipment, and belongs to the field of foundation construction.The high-pressure jet grouting pile equipment comprises a crawler provided with a guide rail stand column and a mounting mechanism, a rotary chuck and a positioning mechanism are arranged on the guide rail stand column in a sliding mode, and a drill rod is detachably connected with a power head arranged on the rotary chuck; the positioning mechanism is used for limiting and driving a protective sleeve arranged on a drill rod in a sleeving mode, the protective sleeve is formed by sequentially connecting sleeve units end to end, the mounting mechanism is used for mounting the sleeve units to be mounted to be coaxial with the drill rod, the mounting mechanism comprises a base, a supporting frame and a hydraulic cylinder, and the base is arranged above the positioning mechanism; the lower end of the supporting frame is rotationally arranged on the base, the upper end of the supporting frame is used for temporarily fixing a sleeve unit to be installed, one end of the hydraulic cylinder is rotationally arranged on the base, and the other end of the hydraulic cylinder is rotationally connected with the supporting frame. When the sleeve units are installed, non-stop operation can be achieved, each sleeve unit limits the drill rod, and the perpendicularity of the drill rod is guaranteed.

The utility model provides a device for simulating the grouting of a pebble stratum, which comprises a grouting box, a hydraulic disc, a hydraulic cylinder and a hydraulic cylinder, wherein the hydraulic disc is arranged at the upper part of the grouting box and can apply pressure to water-rich sand pebbles; a water outlet and a grouting hole are formed in the upper portion of the side wall of the grouting box, and a water inlet is formed in the bottom of the side wall of the grouting box. The device for simulating the grouting of the pebble stratum can simulate and evaluate the performance of the grouting liquid of the water-rich sand pebble stratum, can screen out matched grouting liquid according to the water-rich sand pebble stratum in different areas and different geologies, and is simple in structure, low in cost and suitable for being vigorously popularized.

The present application relates to the field of hydraulic engineering in the water conservancy and hydropower industry, and particularly relates to a stepped water-drop energy dissipation method with noise reduction function. The method forms a three-stage collaborative energy dissipation system of "pebble sound attenuation zone-water-drop step-energy dissipation pool" by excavating tooth grooves, laying anti-freezing impermeable geomembrane, pouring pebble sound attenuation zone framework and filling light-colored natural pebbles, combining with the water-drop steps with surface buried pebbles and the end energy dissipation pool. The method is suitable for various scenes such as urban landscape and freezing and thawing in the north, and has ecological compatibility and construction economy, and the service life of the structure is extended to more than 15 years.

The cofferdam structure comprises a plurality of steel pipe pile implanting holes which are distributed along the periphery of a cofferdam area at intervals, the steel pipe pile implanting holes are filled with clay, steel pipe piles are arranged in the steel pipe pile implanting holes in a penetrating mode, the lower ends of the steel pipe piles are inserted into the clay, and the lower ends of the steel pipe piles are inserted into the clay. The adjacent steel pipe piles are connected together through the steel sheet piles, the interval space between the adjacent steel pipe piles is sealed by the steel sheet piles, the lower ends of the steel sheet piles are nailed in the ground of a cofferdam area, a cofferdam wall is defined by the steel pipe piles and the steel sheet piles, and a plurality of reinforcing hoops distributed in the vertical direction are arranged on the inner surface of the cofferdam wall. And a plurality of horizontal supports for preventing the reinforcing hoop from deforming are arranged in the reinforcing hoop. The utility model aims to provide the cofferdam structure based on the medium-weathered argillaceous siltstone deep and thick pebble covering geology, which can conveniently realize construction in the medium-weathered argillaceous siltstone deep and thick pebble covering geology, and provides a novel cofferdam structure.

The invention relates to the technical field of buoyancy tanks, in particular to a buoyancy tank device for improving the efficiency of horizontal throwing block stone treatment of a sand-deviating geological river vortex pond, which comprises a tank body, a guardrail, a first steel beam, a second steel beam and a buoy, the guardrail is arranged on the edge of the surface of the tank body, the first steel beam and the second steel beam are respectively arranged on the top surface of the tank body and the ground, and the buoy is arranged below the second steel beam. According to the buoyancy tank device for improving the efficiency of treating the horizontally-thrown block stones in the sand-deviated geological river vortex pond, the stone throwing holes distributed in the surface of the tank body provide a centralized channel for block stone throwing, so that the block stones can be thrown into the tank body, and the block stones can be conveniently thrown into the tank body through the auxiliary pushing and sweeping assembly in the middle of the stone throwing holes. According to the design, the moving path of the block stones from a temporary stacking point to a final water entering position is effectively shortened; the shortening of the distance directly reduces the time and physical output required by manual carrying, so that the operation process is more labor-saving and efficient.

The method for measuring the underwater three-dimensional terrain of the pebble bed surface provided by the present disclosure comprises: building an image acquisition platform for obtaining an underwater image sequence of the pebble bed surface; arranging control points and measuring their coordinates; determining the camera height and the camera moving space interval; taking pictures of the target area by cross-section, obtaining the underwater image sequence of the pebble bed surface; performing spatial calculation on the image sequence based on the motion recovery structure method, obtaining the initial encrypted three-dimensional point cloud and the digital orthographic image; establishing a water surface model and calculating the initial water depth of the rasterized point cloud, performing refraction correction on the initial water depth of each point of the rasterized point cloud, finally calculating the corrected bed surface elevation and performing secondary correction on the bed surface elevation based on the water depth, and obtaining the underwater three-dimensional terrain of the target pebble bed surface. The present disclosure is suitable for direct and continuous measurement of the underwater three-dimensional terrain of the pebble bed surface based on photogrammetry, has high spatial resolution and accuracy, is low in cost, simple in arrangement, and does not interfere with the observation object.

The invention discloses a comprehensive prediction and characterization method and system for water-rich sandy gravel stratum tunnel sand bursting, and relates to the technical field of rock mass unstable stratum sand bursting prediction.The method comprises the steps that multi-dimensional drilling parameter data in the water-rich sandy gravel stratum tunnel drilling process is obtained, the global image of the stratum surrounding rock and the multi-source geological and hydrological parameter data of the drilling stratum are obtained; the obtained multi-source data are preprocessed, merging and secondary processing are carried out on the preprocessed multi-source data, and multi-source characteristic parameter data are extracted; based on the multi-source characteristic parameter data, depth layering characterization is carried out, a drill hole stratum characterization result is generated, and a sand bursting risk area is identified; and inputting the generated drill hole stratum characterization result into the trained sand inrush prediction model, extracting high-level features of fusion interaction through an attention mechanism and an interaction mechanism, and finally outputting a sand inrush grade prediction result. According to the method, the sand bursting risk grade can be comprehensively judged, and accurate, comprehensive, rapid and intelligent prediction of water-rich stratum sand bursting is achieved.

The application discloses a freezing design method for a strong water-permeable pebble layer through a freezing process of an inclined shaft, and particularly relates to the technical field of freezing construction. The rock and soil parameters and the regional historical environment temperature of the pebble layer through which the target inclined shaft passes are obtained; a three-dimensional geometric model of the inclined shaft is established to determine the position, inclination and spacing of the freezing pipes arranged along the shaft axis; a spatial model of the freezing area coupled with the pebble layer is constructed; a freezing-heat-seepage multi-field coupling model is constructed according to the historical environment temperature and the freezing pipe arrangement information, the formation process of the freezing body is numerically simulated, and the evolution functions of the freezing boundary expansion range and the freezing thickness at different times are obtained; the freezing coverage is analyzed to determine whether each depth section meets the design freezing thickness and safety factor requirements. The method can realize multi-physical field coupling modeling of the freezing process and accurate control of the freezing body evolution, has the advantages of strong predictability, uniform freezing effect and the like, and is particularly suitable for the freezing design and construction of the inclined shaft under complex geological conditions.

The invention relates to a deep station underground excavation construction method based on a freezing water stop technology, which comprises the following steps of: detecting the distribution density of pebbles and the positions of super-large pores in a stratum, recording the particle size and the arrangement direction of the pebbles in the stratum, and establishing a three-dimensional pore model of the stratum; a main hole is constructed, and after construction of the main hole is completed, the micro directional drilling machine extends out of the main hole and conducts drilling according to the three-dimensional hole model so as to construct branch holes and micro holes; first refrigerants are introduced into the micro holes for preset duration until crack ice plugs are formed, and then second refrigerants are introduced into the main holes for refrigeration until a frozen soil curtain is formed; the stratum is excavated, a primary support is arranged after excavation is completed, and a self-adaptive expansion bag body is pre-buried between the primary support and the frozen soil curtain; and the frozen soil is naturally unfrozen, the stratum stability of the unfrozen area is monitored in real time, and when it is monitored that the pore water pressure of the unfrozen area is reduced to a preset triggering threshold value, cement paste of a preset type is slowly injected into the self-adaptive expansion bag body.

The application discloses a kind of sand pebble stratum and bedrock's soil and stone interface modeling method and system, it is related to the three-dimensional modeling technical field of adverse geologic body, including: according to the drilling information of preliminary designed grouting hole, construct three-dimensional model of drilling;Select the drilling of the edge position of working face as probe hole, carry out field drilling and explore at working face probe hole, determine the soil and stone interface situation of sand pebble stratum and bedrock in hole, demarcate soil and stone interface point and form sequence;Carry out surface fitting, construct the three-dimensional curved surface model of soil and stone interface;Three-dimensional curved surface model is embedded three-dimensional model of drilling according to original coordinate, according to the intersection of drilling and surface, screen grouting hole in remaining drilling;Any grouting hole is carried out field drilling and explore, explore soil and stone interface point and update sequence, further update three-dimensional curved surface model and screen grouting hole again;Model is constantly iterated and updated, until meeting set condition, complete the modeling of soil and stone interface three-dimensional curved surface.

The utility model discloses a kind of earth-rock dam slope surface seepage prevention water stop structure, applied to earth-rock dam dam foundation, concrete layer, clay base layer, seepage prevention membrane, clay covering layer, sand layer, pebble layer are sequentially arranged from inside to outside on the slope surface of the dam foundation, several blocking pits are arranged on the surface of the clay base layer along height direction horizontally, the seepage prevention membrane is laid in the surface of the clay base layer and the blocking pit;The utility model has the beneficial effects that: the utility model selects clay base layer and clay covering layer with stronger adhesion in the upper layer and lower layer material of geomembrane, blocking pit is designed on the surface of clay base layer simultaneously, thereby effectively increasing the longitudinal anti-slippage ability of seepage prevention membrane, improving dam body stability, worthy of wide range of use.

This invention discloses an experimental apparatus and method for visualizing the permeability of grouting slurry in pipe jacking in water-rich pebble formations. The apparatus includes a model box filled with transparent soil, which is composed of transparent fused silica particles and a calcium bromide solution with a refractive index matching that of the fused silica. A circular pipe is nested within the transparent soil. A jacking module is installed at the left end of the circular pipe, and a grouting module is located on the right side of the model box. A pressure plate and weights are installed on top of the transparent soil to adjust the vertical pressure. A first laser slicing observation module and a right-side laser slicing observation module are respectively located in front of and on the right side of the model box. A front-side industrial camera and a right-side industrial camera are also located in front of and on the right side of the model box, respectively. Grouting holes are provided on the wall of the circular pipe. The grouting pipe of the grouting module extends into the inner wall of the circular pipe and connects to the grouting holes through a grouting branch pipe. This invention provides a scientific, intuitive, and reliable experimental basis and methodological support for circular pipe jacking engineering in water-rich pebble formations.

The invention discloses a pebble cofferdam anti-seepage construction method for dynamically adjusting the hole distance of grouting holes based on stratum permeability, which comprises the following steps of: 1) carrying out geological survey on a cofferdam area according to related test regulations to obtain the following stratum structure information; and 2) calculating the actual pitch d of each area according to the following formula: d = alphad0 [(ki / k0) beta]. And (3) grouting holes are formed in all the areas according to the d value obtained through calculation, and grouting operation is carried out. And (4) the grouting effect of the cofferdam is detected, and parameters are optimized and supplementary grouting is conducted when necessary. According to the method, lap joint of slurry veins is ensured, slurry leakage is avoided, and unnecessary drilling and slurry consumption are reduced. The method is suitable for the pebble cofferdams under different geological conditions, the anti-seepage reliability of the pebble cofferdams is improved, alpha and beta can be dynamically optimized according to field tests and monitoring data, the construction precision is remarkably improved, and the construction cost is reduced.

The application discloses a kind of shock absorption system and method, the shock absorption system includes pumping injection device and the pebble stratum of certain volume, pumping injection device is used to inject or pump liquid in pebble stratum, and pebble stratum is used as the foundation of building structure.The shock absorption system can change the mass of pebble stratum by pumping liquid to closed pebble stratum, realize the adjustment of pebble stratum inertia force size and the adjustment of self-vibration frequency, play the resonance effect and liquid sloshing friction energy dissipation through the movement of pebble stratum, reduce the vibration response of building structure, greatly improve the shock absorption energy dissipation efficiency of system, effectively reduce earthquake disaster, also can avoid sand liquefaction phenomenon under the earthquake action of natural pebble stratum;It can directly utilize the characteristics of natural pebble stratum, realize the device of tuning liquid damper shock absorption effect, and be applicable to different foundation conditions, construction is convenient, with good energy dissipation effect, the shock absorption system has pioneering engineering significance and practical value.

This invention relates to the field of gravel geology protection technology, providing a mesh-like reinforcement device and method for gravel geological formations. The device involves directly drilling holes using anchor rods, and the anchoring device remains in place after drilling to prevent hole collapse. Multiple anchor rods arranged in a mesh pattern penetrate deep into the slope of the mountain, achieving mesh-like reinforcement and protection of the gravel geological formation requiring reinforcement, effectively preventing instability in loose gravel geological formations. During drilling, the invention uses a vibratory motor to vibrate the drill rod, making it easier to pass through obstacles such as sand and gravel, providing a feasible technology for drilling deeper holes. High-pressure water or airflow can be used during drilling to overcome difficult drilling challenges.

This invention provides a method for grouting reinforcement and support of shallow foundation pits in pebble strata, comprising the following steps: determining the excavation area to form a shallow foundation pit excavation zone; sequentially inserting multiple steel pipes arranged in a quincunx pattern along the outer edge of the shallow foundation pit excavation zone; sequentially grouting the spaced steel pipes; cyclically grouting each steel pipe; excavating the foundation pit according to the shallow foundation pit excavation zone; repeatedly excavating the pebble strata within the shallow foundation pit excavation zone, and repeatedly installing anchor bolts on the sidewalls within the shallow foundation pit excavation zone; finally excavating the pebble strata within the shallow foundation pit excavation zone to a predetermined position. This invention solves the technical problem that the support of shallow foundation pits in pebble strata still requires large-area reinforcement and support measures, leading to increased costs and long construction periods.

The invention discloses a ground grouting and water plugging method for an inclined shaft to penetrate through a strong permeable pebble bed, and particularly relates to the technical field of grouting and water plugging. Identifying a seepage abnormal high-flux region, extracting a spatial distribution feature vector of a potential water-sand coupling channel, establishing a grouting target point cloud, calculating a connectivity index, and outputting a channel seepage-prone grade in combination with average particle size distribution of pebble particles and porosity; constructing a ground grouting hole laying network according to the sorting result, laying multi-point micro grouting holes in a high-connectivity region, and setting grouting path priorities; in the pre-grouting stage, the slurry permeation radius and the pore sealing rate are monitored, an actual effective grouting section is recognized, layered variable-slurry-property materials are adopted for combined grouting, and the grouting pressure and the backflow slurry sand content are monitored in real time; the water plugging completion degree is judged by comparing the sand content of the backflow slurry with the initial pore structure characteristics; according to the method, accurate recognition and directional plugging of the complex seepage channel in the permeable pebble bed can be achieved, and the water plugging effect and the construction safety are improved.

The application relates to a apron structure with a cemented sand gravel foundation, which mainly comprises cemented sand gravel, an apron and an anti-scouring groove. The cemented sand gravel is arranged on a pebble layer or a stratum with a bearing capacity higher than a preset value after the covering layer of the ground is removed. A mortar layer is arranged between the pebble layer or the stratum and the cemented sand gravel. The cemented sand gravel has a preset laying thickness, and the bottom of the cemented sand gravel is at least partially lower than the scouring bottom line. The apron is arranged on one side of the top of the cemented sand gravel. The anti-scouring groove is arranged on the downstream side of the apron, the bottom of the anti-scouring groove is lower than the bottom of the apron, and the anti-scouring groove is filled with large stones and / or concrete tetrahedrons. The apron structure with the cemented sand gravel foundation has higher stability and can reduce the risk of damage of the apron caused by scouring.