888 results about "Crushed stone" patented technology

This invention relates to a construction method for driving piles using a vibratory driven pile unit. The original walking pile frame is replaced with a crawler crane. Utilizing the flexible movement of the crawler crane, the machine can move immediately after driving one pile to drive the next. At this time, crushed stone can be added to the previous pile, and then the pile can be extracted. This back-and-forth operation greatly improves construction efficiency. The crawler crane is equipped with an adjustment frame, which is fixed at the bottom by a bottom-fixing cylinder. The mast adjusts the upper position of the pile frame, and the adjustment frame adjusts the lower position of the pile frame, ensuring the verticality of the crushed stone piles during driving and extraction. During use, the mast adjusts the position of the pile frame, and the vibratory lifting mechanism drives the hoisting rope to move the vibratory hammer up and down through the slide frame for driving or extracting piles.

The application provides an underwater broken stone base leveling device and a leveling method thereof, which comprises a ship body, the bottom of the ship body is provided with a leveling device, the leveling device comprises an outer frame, outer support leg oil cylinders are arranged at four corners of the outer frame, a sliding leveling mechanism is arranged on the outer frame, inner support leg oil cylinders are arranged at four corners of the leveling mechanism, and an elevation adjusting oil cylinder is arranged at the top of the leveling mechanism. The leveling device is automatically adjusted to be in a horizontal state, then the height of the outer frame is measured, the leveling head is automatically adjusted to a required height according to a set leveling thickness, the movement of the propelling oil cylinder is controlled, the leveling head is leveled at one station of the frame of the support, the walking type advancement of the leveling robot is realized through the interactive support of the four outer support leg oil cylinders and the four inner support leg oil cylinders, the overall device utilizes the fusion and coordination of multiple sensors, the automatic leveling of the underwater broken stone outer frame can be realized, the overall device is automatically leveled, and the problems that the traditional method is difficult to adapt to deep water and has low construction efficiency are overcome.

The utility model discloses a light overhead roadbed structure which comprises an upper main body structure, the upper main body structure is in a segment type, an expansion joint is arranged between the adjacent upper main body structures in the line direction, the lower end of the upper main body structure is provided with a joist structure connected with the upper main body structure, and the joist structure is supported by a pile structure. And thick broken stone hardcore layers in contact with the upper main body structure are further paved between the beam structures. The middle of the overhead roadbed structure is hollow, the overhead roadbed structure has the advantages of being small in filler amount, light in weight, small in soil body additional stress and capable of remarkably reducing post-construction settlement caused by the additional stress. The overhead roadbed structure is small in structural size in the cross section direction, has the advantage of being small in occupied area, and can save land. The overhead roadbed structure adopts a foundation form of the joists and the cast-in-situ bored piles, has the characteristics of high stability and strong lateral deformation resistance, and is safe and reliable in structure.

The invention provides a high-filling slope ecological protection construction method, and relates to the technical field of slope protection engineering. The construction method comprises the following implementation steps: step 1, slope pretreatment; the method comprises the following steps: firstly, shaping and trimming a high-filled side slope, cleaning surface topsoil, gravels and weeds, and synchronously presetting a through-type drainage system at the top, the waist and the toe of the side slope; comprising the four steps of anchor rod laying, grouting and anchoring, lattice beam pouring and geogrid laying, specifically, drilling is conducted on the trimmed slope surface of the side slope, anchor rods are laid, lattice beams fixedly connected with the anchor rods are formed through pouring, then the geogrids are flatly laid in the coverage area of the lattice beams, and double fixing is completed. The anti-sliding stability of the slope body is enhanced, the geogrids can disperse the load of the slope body, the shear strength of the surface soil body of the slope is improved, the overall stability of the high-filled slope is remarkably improved, and geological disasters such as landslide and collapse of the slope are effectively prevented.

The invention discloses a pile forming form and inter-pile soil compactness evaluation method based on vibro-replacement gravel pile construction data. The method comprises the steps of finding a pseudo-residual vibration working section according to a real-time construction depth-time curve, determining a key stage according to a real-time construction filling amount-time curve, finally finding a time node of downward insertion / upward pulling of a gravel pile by a vibroflot according to an amplitude change rule of a real-time construction current-time curve, calculating a transverse extrusion and expansion range after reinforcement, and finally determining a reinforcement result. And the pile forming form is estimated, and the average compactness of the soil between the piles of the reinforced field is calculated. According to the method, evaluation of the pile forming form and the compactness of the soil between the piles is achieved through on-site construction data, and the method has the advantages of being high in evaluation speed, high in accuracy and the like and is suitable for reinforcing effect evaluation of the vibro-replacement gravel pile treatment foundation with the down-inserting and up-pulling construction technology.

The invention discloses a lithotomy and lithotripsy handle and a lithotomy and lithotripsy integrated medical instrument, and belongs to the technical field of medical instruments, the lithotomy and lithotripsy handle comprises an operation part and a guide sheath tube capable of collecting a mesh basket, the guide sheath tube is installed on the operation part, the operation part is provided with an operation device, and the operation device at least has a lithotomy mode and a lithotripsy mode; the lithotomy and lithotripsy integrated medical instrument comprises a mesh basket and a lithotomy and lithotripsy handle. In the calculus removing mode, the operation device can convert external force applied by an operator into driving force for driving the mesh basket to move in the axial direction of the guiding sheath tube, and the mesh basket is driven to be released or recycled through the guiding sheath tube so that calculus removing can be achieved. In the lithotripsy mode, the operation device can convert external force applied by an operator into lithotripsy force for driving the mesh basket to be collected to the guiding sheath tube in the axial direction, so that the mesh basket collects the lithotripsy under the constraining force of the guiding sheath tube. The lithotripter has the advantages that lithotripsy can be carried out during lithotripsy in the bile duct and during lithotripsy, a lithotripsy handle does not need to be externally connected independently, economic cost is low, operation is easy, and the risk of cross infection is avoided.

The invention provides a dam material blasting mining construction method based on upper dam material grading envelope line control, belongs to the technical field of hydraulic engineering construction, and aims to solve the problems that in an existing upper dam material blasting mining technology, grading material control blasting parameters depend on artificial experience to be determined, gravel grading after blasting is difficult to accurately control in the mining process, and the working efficiency is low. And blasting parameters are difficult to adjust. Comprising the following steps: obtaining physical and mechanical parameters of primary rock in a blasting area, obtaining grading prediction data by using a prediction model, and carrying out a blasting test to obtain muck pile gravel overall grading test data; correcting the prediction model according to the difference between the gravel grading prediction data and the test data; and broken stone grading design data of the feeding dam are substituted into the corrected model, blasting construction data of the feeding dam are obtained, and construction is conducted. According to the construction method, blasting parameters can be determined, broken stone grading after blasting is matched with target grading, follow-up screening adjustment work is reduced, and the mining and grading efficiency of dam feeding materials is improved.

The utility model belongs to the technical field of retaining wall, disclose a water conservancy building retaining wall, including retaining wall, backfill and concrete bottom plate, the retaining wall inside is equipped with the water outlet pipe, backfill inside is equipped with the drainage blind ditch, drainage blind ditch inside is equipped with the filter structure, drainage blind ditch is connected with the water outlet pipe through the connecting structure, set up drainage blind ditch and water permeable geotextile when backfilling backfill, reduce the water level of backfill layer upper end to drainage blind ditch lower end, the water of upper end is through drainage blind ditch and flows to water permeable net pipe, the silt that enters water permeable net pipe is reduced through the filtration of blind ditch gravel and geotextile, again due to the water of inside flow of water permeable net pipe can take away trace silt, thereby avoid the deposition of silt and cause the blockage, the water in water permeable net pipe is taken away through the water outlet pipe that is preburied in retaining wall, thereby reduce the hydrostatic pressure of backfill to retaining wall.

The utility model belongs to the technical field of blast hole measuring devices, and particularly discloses a blast hole measuring device in a surface mine, which is characterized in that two sides of a base are respectively connected with a fitting plate through a telescopic assembly, and a measuring scale for measuring the distance between the fitting plates is arranged on the telescopic assembly; a movable seat is movably connected below the base and can move left and right in the axial direction of the base, a laser range finder is arranged below the movable seat through a mounting support, the mounting support is movably connected with the movable seat, the mounting support can drive the laser range finder to slide front and back in the axial direction of the movable seat, and multi-point measurement is achieved. By utilizing the device for measuring the blasting hole in the surface mine, the diameter and depth of the blasting hole can be quickly and accurately obtained, the placement of explosives can be accurately guided, the blasting effect can be improved, and obvious errors of a measurement result caused by the fact that a light path of the laser range finder is blocked by some bulges or broken stone powder in the blasting hole can be avoided.

The invention belongs to the technical field of gravel ridge detection, and relates to a gravel ridge elevation detection system and method. The system comprises a detection rod, a driver, a pull rope sensor and a measurement and control module, the detection rod is arranged on the side, perpendicular to the length direction of the gravel ridges, of the gravel throwing pipe and is parallel to the gravel throwing pipe. The distance between the center of the detection rod and the center of the gravel throwing pipe is equal to the distance between the center lines of every two adjacent gravel ridges. When the riprap pipe lays and levels the current gravel ridge, the detection rod is located above the previous gravel ridge and is driven by the riprap pipe to move in the length direction of the previous gravel ridge, the driver drives the detection rod to move up and down repeatedly, and the detection rod moves downwards to the bottom end of the detection rod to make contact with the top face of the previous gravel ridge every time. The pull rope sensor transmits displacement data of the detection rod when the detection rod moves downwards each time to the measurement and control module for processing, and elevation values of a plurality of detection points of a previous gravel ridge are obtained. According to the invention, the elevation of the previous gravel ridge can be detected while the current gravel ridge is constructed by the riprap pipe, and the elevation detection precision of the gravel ridge is obviously improved.

This invention provides a construction method for improving the drainage capacity of road structures, relating to the field of drainage function technology for the renovation and upgrading of old roads. It separates water bodies between the upper and lower structural layers and the original ground surfaces on both sides of the road structure layer by forming an emulsified asphalt layer and waterproof geotextile. A rapid drainage structure is formed using a concrete pavement crushed stone layer, filled with crushed stone, drainage geogrids, sidewalk rubble, a filter layer, and drainage pipes. This achieves rapid drainage of the road structure, ensuring the stability of the road structure layer in the renovation of old pavements, reducing differential settlement caused by groundwater and other factors, and avoiding disturbance to the road and the resulting reflective cracks. This invention improves the drainage performance at the junction of sidewalks and roads, reducing water disturbance problems.

The utility model belongs to the technical field of tunnel face muck synchronous screening and recycling devices, and discloses a tunnel face muck synchronous screening and recycling device which comprises a shell, a processing groove is formed in the top end of the shell, a conveying groove is formed in the bottom end of the processing groove, and a conveying belt is arranged in the conveying groove. A through groove is formed in the position, corresponding to the conveying belt, of one side of the shell, two pairs of rotating shafts are rotationally connected to one side of the equipment groove, crushing rollers are arranged on the outer sides of the two pairs of rotating shafts in a sleeving mode, a driving box is arranged on one side of the shell, and a guiding block is arranged at the position, located at an opening of the processing groove, of the shell. According to the device, through cooperative use of the rotating shaft, the crushing roller, the driving box, the equipment groove, the motor, the first gear and the second gear, stone in muck can be conveniently crushed, and through cooperative use of the conveying groove and the conveying belt, the crushed muck can be conveniently conveyed out of the device.

The invention relates to the technical field of slope supporting construction of constructional engineering, and particularly discloses a redundant and safe reinforced soil structure and a construction method. Reinforced soil is of a multi-step structure and is constructed on a weathered rock foundation; the reinforced soil sequentially comprises a plain concrete foundation, multiple layers of integral steel-plastic geogrids, a graded broken stone drainage layer, a clay water-resisting layer, a waterproof geomembrane, a concrete sealing bottom and plain filling soil from bottom to top, and reinforced concrete panels are poured on the outer sides of the integral steel-plastic geogrids. A reinforced concrete foundation is arranged at the bottom of the reinforced concrete face plate, a cement soil cushion layer is laid at the bottom of the reinforced concrete face plate, drainage holes and pre-embedded steel tie bars are arranged in the reinforced concrete face plate, the pre-embedded steel tie bars and the whole steel-plastic geogrids are bundled up, and a gravel inverted filter bag is arranged in each layer of steel-plastic geogrids. The clay water-resisting layer and the gravel drainage layer are laid to achieve redundant safe water prevention and drainage, the construction period is controllable, and the manufacturing cost is relatively low.

This utility model discloses a side-limiting device for cement-stabilized crushed stone base course of highways, belonging to the field of highway technology. It includes a pusher plate with a first connecting frame fixed on one side and a second connecting frame fixed on the other side. Limiting side baffles are provided on both sides of the pusher plate. This utility model includes an adjustment component, which allows an electric telescopic rod to move the limiting side baffles via the connecting plates, automatically adjusting the position of the limiting side baffles to adjust the limiting position of the crushed stone base course. Operation is convenient, and the rear baffle can cover the gap between the limiting side baffles and the pusher plate, preventing it from affecting the limiting effect. This utility model also includes a stabilizing component, where the lower end of the limiting side baffle is rotatably connected to a support roller via a positioning shaft. This supports the limiting side baffle, making its movement more stable, and reduces friction during rotation, preventing wear on the limiting side baffles.

The present application relates to the technical fields of mining blasting, in particular to a kind of underground metal mine exploitation blasting charging device and method thereof.The underground metal mine exploitation blasting charging device includes two symmetrical arc-shaped plates, the top of the two arc-shaped plates is connected with a fixed seat on the side away from each other, a first telescopic rod is connected between the fixed seat and the arc-shaped plate, a first spring is sleeved outside the first telescopic rod, and a support is connected between the top of the two fixed seats.The present application can achieve the effect of pushing the arc-shaped plate to expand and extrude the inner wall of blast hole by setting upper support mechanism, lower support mechanism, arc-shaped plate and fixed seat.On the one hand, the arc-shaped plate compacts the soil and gravel of the inner wall of blast hole, expanding the charging space in blast hole;On the other hand, the arc-shaped plate isolates the rough inner wall of blast hole, so that the medicine bag contacts the smooth inner wall of arc-shaped plate and falls smoothly, which can effectively avoid the situation of blockage caused by the medicine bag skewing during charging process, making the blast hole charging more quickly and conveniently.

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.

The application discloses a method for controlling the verticality of a vibroflotation stone pile machine, which comprises the following steps: arranging a drill rod system in parallel with a mast of a hoisting system, so that a vibroflotation system connected with the bottom of the drill rod system is parallel with the mast; detecting the verticality of the mast relative to a main machine on a horizontal plane in real time when the vibroflotation system is used for vibroflotation construction, so as to obtain deviation data of the verticality of the mast; judging whether the verticality of the mast needs to be adjusted according to the real-time deviation data of the verticality of the mast; and adjusting the verticality of the mast if the verticality of the mast needs to be adjusted, so that the vibroflotation system can be used to vibroflotation downward to a construction stratum and form a vibroflotation stone pile hole with a required verticality. According to the method, the vibroflotation system can form a vibroflotation stone pile hole with a required verticality, the uniformity and compactness of a formed vibroflotation stone pile hole are ensured, the safety of the vibroflotation stone pile is improved, the construction period is effectively shortened, and the construction cost is reduced.

The present disclosure comprises a device for crushing stones, which may optionally include a first connector forming a first port, wherein the first connector is configured to be coupled to a first evaluation tube, a second connector forming a second port, a housing, and an auger. The second connector may be configured to be coupled to a second suction tube. The housing may have a lumen that is in fluid communication with the first and second connectors. The auger may be positioned within the lumen adjacent to the housing. The auger may be rotatable within the lumen to crush the stone into fragments and thus prevent clogging of the second suction tube.

The utility model relates to a cable trench structure, and belongs to the technical field of cable installation. According to the utility model, the gravel layer, the fine sand layer and the prefabricated concrete protection plate are arranged around the cable, so that better protection can be provided for the cable, the damage of external force to the cable is effectively reduced, and the service life of the cable is prolonged; the arrangement of the rubble layer and the fine sand layer helps to improve the drainage performance of the cable trench, prevents water accumulation, reduces the risk that the cable is affected with damp, and guarantees the normal operation of the cable. The rubble layer at the bottom of the trench is matched with the plain soil layer, the lime soil layer and the gravel layer at the upper part of the trench, so that the stability of the cable trench structure is improved, larger external force and load can be borne, the influence of ground subsidence on the cable is effectively reduced, and the reliability is relatively high.

The invention discloses a fiber concrete preparation for a pavement, a preparation method thereof and a pavement construction method, relates to the technical field of road construction, and solves the problems of poor elasticity, durability and other performances of the existing pavement. Comprising a binding material composed of Portland cement, granulated blast furnace slag powder and silica fume, aggregate composed of continuous graded broken stone and machine-made sand, composite fiber composed of basalt fiber and polyvinyl alcohol fiber, a functional additive composed of a water reducing agent, a water-retaining agent and a defoaming agent, a catalyst composed of nano-silica and tricalcium aluminate, and water. The pavement construction method comprises the following steps: paving the preparation within 30 minutes, vibrating by adopting a high-frequency vibrator, leveling by adopting a laser leveling machine, covering with geotechnical cloth, and maintaining under standard conditions. The method can be applied to pavement construction, and is particularly suitable for severe pavement scenes such as severe cold and heavy load.

The utility model discloses a coal mine mining filling tunneling mechanism in the technical field of coal mine mining, which comprises a tunneling machine body, a plate body and a dust falling box, the dust falling box is fixedly connected to the lower side of the right side wall of the tunneling machine body, and the plate body is fixedly connected to the top of the tunneling machine body. A rubber air bag is fixedly connected to the top of the plate body, a protective top plate is fixedly connected to the top of the rubber air bag, a mounting groove is formed in the middle of the top of the plate body and located on the inner side of the rubber air bag, and a hollow column is fixedly connected to the bottom of the inner cavity wall of the mounting groove. The top of the heading machine body can be protected, damage to the heading machine body caused by broken stones falling from the top of a mine tunnel during mining is avoided, so that the service life of the heading machine body is prolonged, dust generated during mining can be reduced, and the situation that dust drifts in air and is sucked by workers is avoided.

The application discloses a kind of piece block stone roadbed porosity identification method, device, equipment and storage medium, it is related to highway detection technical field.The method comprises: obtaining the initial structure data of the road to be processed;The initial structure data includes surface layer initial data, base layer initial data, gravel layer initial data and piece block stone layer initial data;Based on a plurality of preset porosities and the initial structure data, the roadbed structure simulation model corresponding to each preset porosity is constructed;The simulation piece block stone layer field intensity and preset porosity of each roadbed structure simulation model are fitted to obtain a fitting formula;Obtain the actual detection data of the road to be processed;Based on the actual detection data, obtain the measured piece block stone layer field intensity;Based on the measured piece block stone layer field intensity, the fitting formula is used to obtain the porosity of the piece block stone layer.

This invention pertains to the field of tunnel structure testing technology, specifically a stiffness coordination testing structure and method for actively unloading gravel-reinforced structures. It includes two supports, on which a gabion cage is mounted. Several tension rod assemblies are installed on the gabion cage, each with a strain gauge connected to a static strain gauge. Two I-beams are positioned on the upper surface of the gabion cage. A reaction frame is located on the experimental platform, with jacks positioned between the reaction frame and the I-beams on the upper surface of the two I-beams. A non-contact full-field strain measurement system is also installed on the experimental platform to measure the displacement data of the lower edge of the gabion cage. This method can simulate the working state of an actively unloading gravel-reinforced structure in a tunnel indoors, realistically reproducing the stress and unloading mechanisms of such structures and reflecting the overall stiffness evolution characteristics.

The utility model relates to fruit planting technical field, and disclose a kind of soil loosening device for fruit planting, including frame and the protective cover of fixed connection in its one end, it is characterized by: the both ends of protective cover are provided with buffer assembly, the inner chamber middle part of protective cover is provided with soil loosening assembly, the both ends of protective cover are provided with two buffer grooves, the both ends middle part of protective cover are provided with mounting groove, buffer assembly includes the limiting plate in the side of protective cover, the top side of limiting plate is fixedly connected with support plate, the top of support plate is fixedly connected with two connecting blocks, the top of connecting block is fixedly connected with buffer telescopic link, buffer telescopic link's surface is equipped with buffer spring, when soil loosening blade meets the hard material such as residual tree root or broken stone in soil, resistance is rebounded, by buffer spring and buffer telescopic link, soil loosening assembly is played the role of buffering, avoid direct contact with hard material, cause the damage of cutter and other structures in soil loosening assembly.

The utility model discloses a sand screening device for building construction, and relates to the technical field of sand screening for building construction, the sand screening device comprises a device main body and a sand screening mechanism, the sand screening mechanism is arranged on the inner side of the device main body, and by arranging the sand screening mechanism, the telescopic length of a hydraulic lifting rod is adjusted, so that the position of a sand throwing plate is conveniently changed according to the sand amount; sand in the sand storage tank is thrown to the sand screening net through the sand throwing plate, the sand is more dispersed and uniform in the falling process through throwing, when the sand is thrown up through the sand throwing plate, the mass stress of large-particle broken stones mixed in the sand is larger, and therefore the large-particle broken stones are thrown farther than the sand, the large-particle broken stones fall into the collecting bin, and the collecting efficiency is improved. And meanwhile, the sand blocking fan blows air inwards, so that the sand is subjected to outward wind resistance, a large amount of sand is prevented from being thrown into the collecting bin, the sand screening effect is ensured, broken stones entering the collecting bin are screened through the sand filtering screen, and normal sand entering the collecting bin can fall into the sand outlet so as to be taken and used together.

The application provides a preparation process of high-strength concrete, and belongs to the technical field of concrete, and comprises the following steps: step S1, Mg-Al-LDH-NO2 powder is prepared; step S2, microcapsules are prepared; step S3, machine-made sand, granite crushed stone, Portland cement, slag powder, limestone powder, metakaolin, microcapsules, water, a water reducing agent and Mg-Al-LDH-NO2 powder are mixed and stirred to obtain high-strength concrete. The application can achieve the purpose of improving the strength and durability of concrete.

The utility model discloses a prestressed pipe pile head water seepage treatment device for muddy soil, and relates to the technical field of building construction, the treatment device is arranged on a bottom plate on which a pipe pile is constructed and a pile core is not poured with water seepage, and the treatment device comprises a round steel supporting plate, the round steel pipe penetrates through the through hole, the lower part of the round steel pipe is embedded below the round steel supporting plate by 200mm, and drain holes are uniformly formed in the peripheral side of the embedded section; the half-cut PVC pipe covers the top of the round steel pipe, one end of the half-cut PVC pipe is closed, and the other end of the half-cut PVC pipe extends to the water collecting well; the protection layer is poured outside the round steel supporting plate and the round steel pipe, so that the top of the round steel pipe is flush with the surface of the bottom plate; the drainage holes evenly distributed in the circumferential side of the round steel pipe can rapidly collect underground water, the PVC pipe is cut in half to enlarge the flow guide section, and water flow blockage is avoided. The brick structure is filled with the gravel layer, silt is effectively filtered, drainage holes are prevented from being silted, and the service life of the device is prolonged.

The utility model discloses a double-pile type L-shaped embankment structure which comprises pile foundations, a concrete cushion layer, an L-shaped wall body, handrails, a broken stone cushion layer and grouted rubble. The pile foundation is driven into an original embankment foundation, the concrete cushion layer is laid on the original embankment foundation, the L-shaped wall body is arranged on the concrete cushion layer, the upper end of the pile foundation penetrates through the concrete cushion layer into the L-shaped wall body, the side, close to a riverbed, of the L-shaped wall body is connected with the broken stone cushion layer, and the broken stone cushion layer is arranged on the riverbed. The rubble hardcore is provided with grouted rubble; backfill soil is arranged on the side, away from the riverbed, of the L-shaped wall body, and a road is arranged on the backfill soil; and the handrails are arranged on the L-shaped wall body. The double-pile type L-shaped embankment structure provided by the utility model aims to overcome the existing defects, is stable in structure, convenient to construct and low in manufacturing cost, and ensures the protection function of the embankment.

The invention provides a full-capacity low-temperature storage tank pile-foundation-free ground-sitting type concrete foundation construction process which comprises the following steps: constructing a stratum model of a construction area, namely constructing a three-dimensional model by using an earthquake tomography method, removing a soil layer on the surface of the construction area, calibrating excavation depth, and solving a three-dimensional model with different excavation depths by means of the stratum model. The method comprises the following steps: crushing the earthwork volume of a hard rock stratum, excavating a gravel layer and retaining the earthwork volume, then comprehensively calculating the construction cost to determine the excavation depth on the premise of ensuring the construction quality, pouring a concrete sealing layer at the upper end of a gravel layer pit hole in the hard rock stratum after excavation is finished, and distributing grouting pipe holes which are formed in a penetrating manner in the concrete sealing layer, and after the concrete seal layer is hardened, high-pressure water is pumped into the grouting pipe hole for cleaning, after overflowing water becomes clear, grouting treatment is conducted on the grouting pipe hole, a plurality of concrete layers are poured into the construction area, and foundation construction is completed. The construction cost is reduced according to the geological condition.