34 results about "Sandcrete" patented technology

The application relates to a kind of precipitation devices for sand layer foundation, comprising well body, the well body sequentially comprises at least one standard section and one water passing section from top to bottom;Standard section includes second standard section steel cylinder and first standard section steel cylinder;Water passing section includes first water passing section steel cylinder, third water passing section steel cylinder and second water passing section steel cylinder arranged concentrically from outside to inside;First water passing section steel cylinder wall is provided with a plurality of water passing holes, first water passing section steel cylinder and third water passing section steel cylinder are filled with water filtering gravel, and water passing pipe is arranged between third water passing section steel cylinder and second water passing section steel cylinder.The above-mentioned precipitation device adopts standard section and water passing section to jointly form well body, forms supporting structure by steel cylinder, and water passing structure (water passing structure is composed of water passing hole, water filtering gravel and water passing pipe) is arranged in water passing section, which can ensure that groundwater can successfully enter the well body, and can also prevent hole collapse in sand layer with high water content.

The application discloses a kind of karez reinforcement protection methods using egg-shaped culvert, comprising the following steps: S1: the silt of karez culvert reinforcement section is cleaned;S2: support mechanism is used to support egg-shaped culvert, then egg-shaped culvert is used to reinforce culvert, and egg-shaped culvert is inscribed by half-elliptical section and half-round section;S3: the gap between culvert wall and original karez wall is filled with sand or sand gravel consistent with the surrounding stratum, and a layer of geomembrane is wrapped outside the joint;S4: according to the different forms of road and facility occupying karez shaft, the targeted reinforcement method is used for the required reinforcement of the shaft.The device can maximize the adhesion with karez culvert by setting the egg-shaped culvert, which can maximize the reduction of damage to the cultural relics and the original architectural style, the egg-shaped culvert has good compression resistance, is convenient for inspection and dredging, reduces water leakage loss, and effectively reduces construction cost.

This invention discloses an environmentally friendly, high-efficiency permeability-reducing composite material for sand and its applications. The environmentally friendly, high-efficiency permeability-reducing composite material comprises xanthan gum, nano-silica, and pectinase, used to improve the strength and reduce the permeability of sand. The invention first mixes sand and soil in equal proportions to obtain clayey sand, then incorporates the environmentally friendly, high-efficiency permeability-reducing composite material to obtain remolded sand. Permeability tests, triaxial shear tests, and microscopic tests on the remolded sand show that after incorporating the environmentally friendly, high-efficiency permeability-reducing composite material, gel material is uniformly distributed on the surface and within the pores of the remolded sand, forming a non-penetrating pore structure within it, reducing the permeability of the remolded sand. Furthermore, long-term curing can improve the strength and ductility of the remolded sand. The environmentally friendly, high-efficiency permeability-reducing composite material provided by this invention is environmentally friendly, efficient, low-cost, and applicable to multiple scenarios, with broad application prospects.

This invention discloses a lightweight foamed sand based on a low-temperature resistant microbial solidifying agent and its preparation method. The lightweight foamed sand comprises solid and liquid substances in a mass ratio of 3.5-6:1. The solid substance comprises 78-84 wt% sand, 12-18 wt% composite activator, and 4-6 wt% bacterial foam adsorbent. The liquid substance is a cementing solution. The preparation method includes the following steps: preparing a low-temperature resistant microbial solidifying agent; mixing the prepared low-temperature resistant microbial solidifying agent with sand to obtain a solid substance; and mixing the obtained solid substance with a cementing solution to obtain the lightweight foamed sand based on the low-temperature resistant microbial solidifying agent. The technical solution of this invention significantly improves the survival rate and mineralization efficiency of the microorganisms under low-temperature conditions. The lightweight foamed sand prepared using this technical solution is lighter in weight for the same volume and has higher compressive strength and impermeability.

The rolling leveler for sand bed for stone pavers is configured for use with sand. The rolling leveler for sand bed for stone pavers levels sand after the sand has been placed into a sand mold structure. The rolling leveler for sand bed for stone pavers comprises a screed structure and a rail structure. The screed structure rolls along rail structure. The rail structure elevates the screed structure above the sand contained in the sand mold structure. The elevation of the screed structure above the sand mold structure is adjustable. The screed structure rolls along the rail structure to level the sand contained in the sand mold structure.

This invention provides a machine learning-based method and system for identifying sand liquefaction, belonging to the field of machine learning technology. The invention simultaneously acquires and cleans in-situ and ground motion parameters, combines them with historical liquefaction annotations to classify samples, and then constructs a class-balanced dataset by fusing oversampling and undersampling. Multidimensional mechanical and response features are extracted, an optimized gradient boosting tree model is trained, and this model is used to assess the probability of site liquefaction, achieving high-precision intelligent identification of sand liquefaction.

The utility model provides a kind of underground water sampling device, belong to sampling equipment technical field, solve the underground water sampling cumbersome difficulty, time-consuming and labor-consuming, the water sample taken suffers pollution problem.Underground water sampling device includes: the drill rod with top opening and bottom opening;Fixedly connected on the outer surface of the drill rod multiple blades;Screw is connected at the bottom opening of the drill rod;Iron screen is installed on the inner surface of the drill rod.The technical scheme of the utility model utilizes sand soil liquefaction to take water, can directly obtain unpolluted underground water water sample in sand soil stratum, it is convenient and fast, simple and practical in design, reduces underground water sampling difficulty.

The application discloses a kind of cantilever type tunneling machine cutting drilling device, including two symmetrical installation in the rotation mechanism two sides of multi-drill position type drilling mechanism, two the multi-drill position type drilling mechanism coaxial arrangement, and the rotation mechanism is installed between the rotary mechanism and adapter arm, the adapter arm is detachably connected with hydraulic cantilever, the rotary mechanism is used to drive rotation mechanism and two multi-drill position type drilling mechanism along the rotation axis of rotation, rotation mechanism is used to drive two multi-drill position type drilling mechanism along respective axis rotation.The application can effectively improve the efficiency of operation and the durability of equipment, realize multi-angle flexible tunneling, integrate multiple function modes, can switch drilling mode as needed to adapt to different hardness of sand layer, and due to the modular structure, improve the convenience of maintenance.The application is suitable for the technical field of tunnel construction equipment.

This invention provides a constant-flow following fully automatic sand spreading device and method, including a column and a sand storage container attached to the column for loading sand. An automatic flow compensation mechanism is installed at the lower part of the sand storage container, which automatically adjusts the outflow rate of sand based on the liquid level of the sand within the container. An automatic height following mechanism is installed between the column and the sand storage container, which automatically adjusts the suspension height of the sand storage container based on changes in the height of the target sand spreading plane. Compared with existing technologies, this invention can monitor the liquid level of sand within the storage container in real time, thereby controlling the movement of the misalignment plate to ensure that the outflow rate of sand from the storage container remains constant throughout the sand spreading process. Furthermore, the fiber optic pressure gauge provided in this invention forms a feedback adjustment mechanism with the automatic height following mechanism and the curtain dispersion device, automatically adjusting the distance between the automatic height following mechanism and the curtain dispersion device and the surface of the sand in the model box during sand spreading, achieving constant control of the sand drop distance.

This invention relates to the field of data analysis technology, specifically to a method for calibrating a liquefaction criterion for sand, a sand liquefaction discrimination method, apparatus, equipment, and medium. The method includes: classifying sand samples according to their inhomogeneity coefficient and curvature coefficient to obtain particle size distribution types; for each type, analyzing the measured fine particle content and initial void ratio to obtain an influence weighting function and statistical values ​​of fine particle content; preparing samples with different fine particle contents and initial void ratios, conducting cyclic triaxial tests under different cyclic stress ratios and equivalent cycle numbers, and recording the number of liquefaction cycles; correcting the initial void ratio using the influence weighting function and statistical values ​​to obtain an equivalent initial void ratio; fitting a sand liquefaction discrimination criterion based on the equivalent initial void ratio, cyclic stress ratio, number of liquefaction cycles, and equivalent cycle number; and performing sand liquefaction discrimination based on the sand liquefaction discrimination criterion, thereby improving the reliability of liquefaction risk assessment.

The application relates to the technical field of building construction, in particular to a soft foundation composite reinforcement pile-forming construction method, which comprises the following steps: S1. early-stage investigation and scheme accurate adaptation; S2. site pretreatment and accurate lofting; S3. loose sand layer gravel drainage pile construction of the upper part; S4. CFG-cement soil composite pile construction of the lower part; S5. variable stiffness cushion layer laying and pile top treatment; S6. real-time quality control during the construction process; and S7. post-settlement monitoring and maintenance. The application can realize accurate adaptation of complex composite soft foundations, improve the pile-soil collaborative bearing capacity, reduce construction disturbance, simultaneously complete drainage and reinforcement, strengthen quality control, and guarantee engineering quality and efficiency.

The application discloses a kind of cantilever type tunneling machine cutting drilling device, including two symmetrical installation in the rotation mechanism two sides of multi-drill position type drilling mechanism, two the multi-drill position type drilling mechanism coaxial arrangement, and the rotation mechanism is installed between the rotary mechanism and adapter arm, the adapter arm is detachably connected with hydraulic cantilever, the rotary mechanism is used to drive rotation mechanism and two multi-drill position type drilling mechanism along the rotation axis of rotation, rotation mechanism is used to drive two multi-drill position type drilling mechanism along respective axis rotation.The application can effectively improve the efficiency of operation and the durability of equipment, realize multi-angle flexible tunneling, integrate multiple function modes, can switch drilling mode as needed to adapt to different hardness of sand layer, and due to the modular structure, improve the convenience of maintenance.The application is suitable for the technical field of tunnel construction equipment.

The invention discloses a press film sealing system and process based on in-situ material utilization and mechanical precise construction, and relates to a lateral sealing link in vacuum pre-pressing technology. The invention includes partition boundary groove excavation, in-situ silt immediate structural protection wall construction, mechanical vertical active press film, film spreading and double-zone synchronous lapping. The invention constructs a collaborative sealing system including in-situ silt immediate structural protection wall, mechanical vertical active press film and double-zone synchronous integrated construction. The invention converts loose in-situ material into a structured sealing body, and combines with mechanical precise operation, fundamentally solves the pain points of sand soil intrusion leading to air leakage, secondary excavation causing disturbance, and strong material dependence and complicated process in traditional process, and significantly improves the sealing reliability, construction efficiency and engineering economy.

The utility model discloses a sand soil geological foundation pit soil nailing wall supporting structure reinforcing device relates to building support technical field, including foundation pit slope reinforcing layer, the opening is fixed to be provided with the opening one side of foundation pit slope reinforcing layer. The utility model provides the device in foundation pit slope reinforcing layer is the base support, cooperates the steel bar net layer of the steel bar of the multiple screw thread steel bar wearing and setting the superimposed type supporting panel, forms the cooperative anchoring system, and the close connection of screw thread steel bar and steel bar net layer can effectively transfer the supporting force to the deep sand of foundation pit slope, avoids the problem that the sand soil particle progressive migration under traditional single grouting anchoring, significantly improves the effective anchoring radius stability of soil nailing anchoring section, reduces the attenuation of anchoring force with time, guarantees the long -term anchoring effect of supporting structure.

The application discloses a kind of state-related sand static earth pressure coefficient calculation method considering particle size and compactness.The method comprises the following steps: obtaining the state parameter of the sand sample to be measured, the state parameter includes the compactness parameter reflecting the compactness of the sand sample to be measured, and the particle size parameter reflecting the particle size;Based on the compactness parameter, the peak friction angle of the sand sample to be measured is determined by a preset friction angle growth equation;Based on the peak friction angle and the particle size parameter, the static earth pressure coefficient of the sand sample to be measured is calculated by a preset static earth pressure representation model.The application overcomes the technical limitations of traditional single-variable empirical formula, effectively couples the particle size effect and state correlation in soil mechanics response, and significantly improves the calculation accuracy of static lateral earth pressure under complex sand foundation conditions.

This invention discloses an automated calibration device and method for a three-dimensional earth pressure cell, relating to the field of earth pressure calibration devices. It solves the problems of existing three-dimensional earth pressure cell calibration devices being cumbersome to operate, lacking accuracy, having low automation, and being unable to comprehensively and accurately detect and calibrate triaxial stress. The device includes a base plate, a cylinder, a detection mechanism, a backfilling mechanism, and a positioning mechanism. The detection mechanism includes a three-dimensional earth pressure cell, the backfilling mechanism includes a loading plate with a backfilling groove, and the positioning mechanism includes an electromagnet. This invention calibrates the sand pressure inside the cylinder using the three-dimensional earth pressure cell in the detection mechanism. The backfilling groove on the backfilling mechanism evenly transports the sand from the top to the bottom and allows for sand compaction. The positioning mechanism pre-controls the electromagnet to position the three-dimensional earth pressure cell, and when the backfilling mechanism has reached the required height, the three-dimensional earth pressure cell is placed on top of the sand for detection.

The utility model discloses a kind of internal hidden disease full-scale test model and system of road, this model can simultaneously simulate the loose, cavity, water-rich, transverse crack and vertical crack one or several hidden diseases of different positions of road structure layer, ensure the similarity of test model and actual road disease, so that full-scale model test result is more representative and reliability;Technical scheme includes: to be built full-scale model, the to be built full-scale model sequentially includes subgrade filled with sandy soil, base layer laid with water-stable macadam and surface layer laid with asphalt concrete from bottom to top;Metallic iron sheet is evenly arranged between filled subgrade and original stratum, subgrade and water-stable layer, water-stable layer and asphalt layer;A variety of hidden disease models are provided in the to be built full-scale model, and the hidden disease model includes loose model, void model, water-rich body model and crack model.

The utility model discloses a nodular cast iron well lid casting sand treatment device, including base, still include: scattering subassembly, conical cylinder, U -shaped support, shaking subassembly, the upper side fixed connection of base U -shaped support is equipped with scattering the scattering subassembly to the sand, the top of U -shaped support is equipped with the shaking subassembly to the sand soil and shakes and moves up and down. The utility model discloses through scattering subassembly and shaking subassembly, make conical cylinder rotate while and reciprocating motion up and down, make conical cylinder drive sand soil and reciprocating motion up and down and rotate, make the agglomerated sand soil that is scattered and shake, make sand soil better come out, make the sand soil particle that handles well along the filter hole on the filter plate falls to the bottom of conical cylinder, and falls into the collecting box.

The utility model provides a kind of anti-infiltration structure and anti-infiltration system of seawater pumped storage power station belong to hydroelectric technology field, this anti-infiltration structure includes cushion layer, first anti-infiltration layer and second anti-infiltration layer.Wherein, the cushion layer is set on foundation, and the cushion layer is sand mixed cushion layer;The first anti-infiltration layer is set on the cushion layer, and the first anti-infiltration layer is concrete layer;The second anti-infiltration layer is set on the first anti-infiltration layer, and the second anti-infiltration layer includes geomembrane layer.The anti-infiltration structure of the utility model effectively enhances the reliability of anti-infiltration structure, reduces or avoids the seepage of the reservoir basin that accumulates seawater, to avoid the adverse effects on the upper reservoir bank slope stability and surrounding groundwater environment etc.

The present application relates to the technical field of data processing, in particular to a sand liquefaction influence range evaluation method, device, equipment and medium. According to the soil physical parameters obtained at multiple drilling positions in the target area, the actual cyclic stress ratio and the critical cyclic stress ratio of each drilling position are calculated; the base safety factor is calculated according to the ratio of the critical cyclic stress ratio to the actual cyclic stress ratio; the base safety factor is corrected according to the coarse sand mass proportion of each drilling position to obtain the corrected safety factor; the liquefaction index of each drilling position is obtained according to the corrected safety factor range of the corrected safety factor of each drilling position and the liquefaction index corresponding to the corrected safety factor range; the liquefaction index spatial distribution map of the target area is obtained according to the liquefaction index of all drilling positions and the preset geological complexity index. The present application provides a clear spatial range basis for the targeted arrangement of anti-liquefaction measures, and reduces the judgment ambiguity in engineering decision-making.

The application relates to the technical field of pipe pile sinking, in particular to a high-efficiency prestressed pipe pile sinking device and a construction method, which comprise a pilot hole, the pilot hole is drilled by a rotary drilling machine, the pilot hole is located at a position on a foundation where pipe pile sinking is needed, the depth of the pilot hole is smaller than the length of a prestressed pipe pile, and the diameter of the pilot hole is smaller than the diameter of the prestressed pipe pile. The application has the advantages that the lateral friction force and end resistance of the soil layer on the pile body are reduced, excessive disturbance to the surrounding stratum is avoided, after the rotary drilling machine completes the pilot hole, the prestressed pipe pile is gradually pressed into the pilot hole by a static pressure pile equipment, the verticality of the pile body is maintained during the sinking process, the bearing capacity and stability are improved, the construction efficiency is improved, the sinking speed of the pile body is obviously improved through the pilot hole pretreatment, the construction period is shortened, and the effect is suitable for diverse stratum conditions such as silt, cohesive soil, sand, high underground water level and the like.

The application relates to the technical field of geotechnical engineering, and discloses a method for determining the limit value of puncture and extrusion damage in the pile shoe penetration process, which obtains the measured resistance data of the pile shoe in the layered soil to construct a measured penetration resistance curve, and constructs corresponding theoretical penetration resistance curves of pure sand and pure clay by using a bearing capacity formula. The limit value is determined based on the characteristics of the measured curve and comparison results: for the sand-on-clay working condition, the vertical distance from the growth inflection point of the measured curve to the interface of the lower stratum is determined as the puncture damage limit value; for the clay-on-sand working condition, the vertical distance from the position where the resistance ratio of the measured curve to the pure clay theoretical curve reaches the extrusion effect control threshold to the interface of the lower stratum is determined as the extrusion damage limit value. Finally, the above limit value is output, and the area where the distance from the bottom surface of the pile shoe to the interface between layers is less than the limit value is defined as a critical risk area. The application realizes quantitative definition of the position where the damage mode of the layered soil occurs.