338 results about "Soil cement" patented technology

The invention discloses a drill rod for construction of an integrated stirring forming type cemented soil stiff anchor rod, the drill rod comprises a drill bit part and a hollow drill rod, the drill bit part comprises a shell, an anchor disc fixed in the shell and a spiral blade welded on the shell, and the hollow drill rod is inserted into the shell; the sheath steel pipe is inserted into the hollow drill rod and fixed to the shell, the grouting pipe is inserted into the sheath steel pipe, one end of the rod body is fixed to the anchor disc, and the other end of the rod body extends out of the sheath steel pipe. A first grouting hole is formed in the shell, and a second grouting hole is formed in the sheath steel pipe. The invention further discloses a construction method of the integrated stirring forming type cemented soil stiff anchor rod. When the method is used, the processes of hole forming, anchoring, grouting and the like are integrally formed, the process is simple, the speed is high, and the quality is easy to control; the formed cement-soil pile body is uniform in internal structure and reliable in strength; tension of the anchor rod is uniformly distributed, so that stress concentration can be reduced; and the formed cement soil pile body is high in end strength and good in safety.

According to the intelligent control method and system for the double-wheel milling and deep stirring equipment, geological data of a construction area are obtained through preset stratum detection equipment, geological data corresponding to a construction groove section are determined, and the tunneling speed is intelligently adjusted in combination with the milling wheel torque monitored in real time and the current tunneling depth. According to the method, speed adjustment is carried out according to milling wheel torque data, tunneling depth and stratum geological data, meanwhile, associated data of the tunneling depth and the speed are generated, and finally cement paste is injected into a groove section when equipment is lifted. According to the intelligent control method, construction parameters can be adaptively adjusted according to different geological conditions, the milling efficiency and precision are effectively improved, equipment abrasion is reduced, and the service life of equipment is prolonged. Through the combination of real-time data monitoring and intelligent parameter adjustment, the method realizes the accurate control and optimization of the construction process of the milling and deep stirring equipment, and provides more efficient and reliable technical support for the construction of the cement-soil continuous wall.

The invention relates to a construction method and construction equipment for a high-pressure jet grouting pedestal pile. The construction method comprises the steps that S1, the equipment enters a site; s2, taking a fixed pile cylinder, and pressing the fixed pile cylinder to a bearing stratum at a pile position; s3, the soil body in the hollow part of the fixed pile cylinder is taken out; s4, jet grouting cutting or expanding cutting is carried out in the undisturbed soil body at the bottom of the fixed pile cylinder to form an expanded pit; s5, molded concrete is fed into the expanded pit in a pressed mode, the molded concrete is limited to upwelling in the hollow part of the fixed pile barrel, and cemented soil in the expanded pit is extruded into the undisturbed soil body on the peripheral side of the expanded pit and the gap between the fixed pile barrel and the pile hole; an expanding body, a lower surrounding body, a reinforcing body and an upper surrounding body are respectively formed; and S6, concrete is poured into the hollow part of the fixed pile cylinder to form a pile body. During construction, surrounding soil is basically not disturbed, noise is low, the pile can be exploded, the upper surrounding body and the lower surrounding body which are integrally solidified and formed wrap and protect the joint part between the pile body and the expansion body, and the anti-shearing capacity of the joint part of the pile body and the expansion body can be greatly improved.

The invention discloses a method and device for testing moisture migration in the frost heaving and thaw collapse process of fiber cement soil based on low-field nuclear magnetic resonance, and relates to the field of cement soil testing engineering.The method comprises the steps that T2 spectrums of the whole freezing process and the whole thawing process of a fiber cement soil sample are obtained; inverting a three-dimensional moisture distribution diagram of the whole freezing process and the whole melting process of the fiber cement soil sample according to the T2 spectrum; and determining moisture migration conditions of the whole freezing process and the whole melting process of the fiber cement soil sample according to the three-dimensional moisture distribution diagrams of the whole freezing process and the whole melting process of the fiber cement soil sample. According to the method, T2 spectrum data is mapped to a three-dimensional space position on the basis of a nuclear magnetic resonance (NMR) signal gradient positioning technology, and a pixel-level three-dimensional moisture distribution diagram of a fiber cement soil sample is obtained by performing data inversion on a T2 spectrum, so that pixel-level moisture migration conditions in the freezing process and the melting process of the fiber cement soil are visualized.

The utility model relates to a shield tunnel anti-floating structure which comprises a shield tunnel, a grouting body is arranged outside the shield tunnel, a mattress layer is arranged outside the grouting body, and a plurality of cement-soil piles are formed outside the mattress layer in a grouting mode. An embedded steel plate is arranged in the shield tunnel; a plurality of embedded anti-floating components connected with the embedded steel plate are arranged on the shield tunnel in a protruding mode, and the anti-floating components are sequentially arranged in the grouting body, the mattress layer and the cement-soil piles in a penetrating mode. The cushion layer can reduce the risk of segment slab staggering or differential settlement between the adjacent grouting holes, and deformation of the tunnel due to uneven stress is prevented; the anti-floating component plays a role in preventing the tunnel from floating upwards, and the shield tunnel anti-floating structure not only has a good tunnel anti-floating effect, but also prevents the tunnel from settling and deforming.

The invention provides a construction method of a composite foundation pit supporting structure, which adopts a cement-soil mixing pile wall, a plurality of H-shaped steels, a reinforced concrete coping plate, a cement-soil wall top beam, a cast-in-situ bored pile row, a plurality of pre-stressed anchor rods, a pile row coping beam and a plurality of connecting beams, a cast-in-situ bored pile row is arranged on a construction working face, close to the foundation pit side, of a cement soil mixing pile wall, the upper end of a pre-stressed anchor rod is arranged on a pile row capping beam, the pre-stressed anchor rod obliquely penetrates through the cement soil mixing pile wall through a first channel, and a cement soil wall top beam and the pile row capping beam are in rigid connection through a connecting beam. The cement-soil mixing pile wall serves as an initial cantilever soil retaining main body, and is combined with the cast-in-situ bored piles to form an integral frame for connecting the cement-soil wall top beam and the pile-in-row capping beam, so that support-free excavation of the foundation pit can be realized, the construction operation is convenient, the construction period is effectively shortened, the manufacturing cost is saved, and meanwhile, the safety and the stability of the whole foundation pit in the excavation period are ensured.

The invention discloses constant-temperature curing and loading integrated test equipment for preparation of mixing piles, and relates to the technical field of preparation of mixing piles, and the constant-temperature curing and loading integrated test equipment comprises a refrigerator, a constant-temperature device, a loading device and a multi-angle mixing pile preparation device. According to the constant-temperature curing and loading integrated test equipment for preparing the stirring pile, through coordination of heating and refrigerating, the temperature control precision of a conventional refrigerator is improved, and the uniformity of a temperature field in the refrigerator is guaranteed; the whole process from pile manufacturing, maintenance to loading is completed in the same constant-temperature space, interference caused by process conversion is eliminated, finally, the reinforcing process and effect of the inclined cement-soil mixing pile in the high-temperature frozen soil roadbed are accurately simulated, and test errors caused by temperature fluctuation and process separation in a traditional method are avoided; by quickly adjusting the angle of the stirring rod and selecting different spray hole combinations, one device can simulate various construction processes, different scientific research and test requirements are met, and the flexibility in use is improved.

The invention relates to an aggregate-adding construction method for cement soil spiral stirring pile construction, which comprises the following steps: acquiring a construction stratum type, determining a construction scheme according to the construction stratum type and preset engineering requirements, and setting equipment parameters according to the construction scheme; acquiring physical characteristics of the aggregate, determining the putting amount of the aggregate according to the physical characteristics of the aggregate, and adding the aggregate based on the putting amount of the aggregate; an equipment starting instruction is generated based on the equipment parameters, a drilling tool is controlled to stir aggregate and cement soil according to the equipment starting instruction, stratum feedback data is monitored in real time, and the rotating speed and the descending speed of a drilling rod are dynamically adjusted; and according to a preset construction period, the compactness and the mechanical property of the pile body are obtained, and quality evaluation is conducted on the compactness and the mechanical property of the pile body through the nondestructive testing technology. The device has the effect of improving the aggregate adding quality in the cement soil spiral stirring pile construction.

The invention particularly discloses a layered and segmented composite fabricated foundation pit support structure and a construction method. According to the overall technical scheme, double enclosure of deep mixing piles and a cemented soil retaining wall is followed, truss rib laminated slabs are spliced in a layered and segmented mode, an anchor rod group transversely penetrates through the deep mixing piles to be anchored into the cemented soil retaining wall, anchor rod holes are also used as high-pressure grouting holes, anchor rod sleeves guide anchor rods to enter soil and assist the truss rib laminated slabs to be in place, and high-strength grouting materials are grouted at high pressure; according to the design concept of the pile-wall-plate-anchor rod composite type foundation pit support structure, a technical system that a soil layer outside a foundation pit is stabilized through a cement soil retaining wall, force is borne by deep mixing piles, support grouting forming is conducted through a truss rib laminated plate, and overall cooperative bearing is strengthened through anchor rod driving is constructed. And the supporting requirements of complex geological environments and large-depth foundation pits are stably met.

The present invention discloses a cement-soil pile construction device, aiming to provide a cement-soil pile construction device that can reduce manual operation, lower labor intensity, and improve the construction efficiency of tunnel reinforcement. It includes a high-pressure jet grouting pile machine, which comprises a jet grouting drill rod, a vehicle frame, a support tower rod arranged on the vehicle frame, a first guide rail arranged on the support tower rod, a sliding seat sliding along the first guide rail, a sliding seat moving actuator for driving the sliding seat, and a rotary power head arranged on the sliding seat. The jet grouting drill rod includes a drill body and a drill rod tail connected to the upper end of the drill body, and the drill body is composed of several connected drill pipes connected in sequence; a walking vehicle, on which an installation platform is provided, and the high-pressure jet grouting pile machine is installed on the installation platform through the vehicle frame; a drill pipe automatic installation device, which includes a drill pipe placement rack and a manipulator arranged on the installation platform, and the drill pipe placement rack is used for placing the connected drill pipes of the jet grouting drill rod.

The invention particularly discloses a layered and segmented composite fabricated foundation pit support structure and a construction method. According to the overall technical scheme, double enclosure of deep mixing piles and a cemented soil retaining wall is followed, truss rib laminated slabs are spliced in a layered and segmented mode, an anchor rod group transversely penetrates through the deep mixing piles to be anchored into the cemented soil retaining wall, anchor rod holes are also used as high-pressure grouting holes, anchor rod sleeves guide anchor rods to enter soil and assist the truss rib laminated slabs to be in place, and high-strength grouting materials are grouted at high pressure; according to the design concept of the pile-wall-plate-anchor rod composite type foundation pit support structure, a technical system that a soil layer outside a foundation pit is stabilized through a cement soil retaining wall, force is borne by deep mixing piles, support grouting forming is conducted through a truss rib laminated plate, and overall cooperative bearing is strengthened through anchor rod driving is constructed. And the supporting requirements of complex geological environments and large-depth foundation pits are stably met.

The invention discloses a stiff composite pile construction detection method based on a quantum technology and an electromagnetic geophysical prospecting method, which comprises the following steps of: constructing a peripheral cement soil pile and a core pile, and doping an electromagnetic sensitive material into a cement soil curing agent; a quantum gravity gradiometer and an electromagnetic induction instrument which are integrated on construction equipment are used for collecting gravitational field and electromagnetic field data of a construction area in real time in the whole process of cement soil stirring and core pile pressing-in; the density, the water content distribution and the uniformity of the cement soil are inversed and regulated in real time, and an unfavorable geologic body is identified; dynamically adjusting construction parameters based on cement soil properties and geological conditions obtained by inversion, and performing targeted reinforcement on a bearing stratum; the pile end stress bubble formation and the pile-soil interaction effect are verified; and based on the multi-source data acquired in the whole process, generating a digital quality file of the single pile for quality acceptance. The method can realize a construction process, namely a detection process, a single pile, namely a sensor, and a global data driving decision.

Provided is a method for predicting the pile-forming strength of the body of a high-pressure jet-grouted pile on the basis of the testing of return grout at a construction site. The method comprises: configuring strength test blocks having different cement dosages, testing the strengths thereof, and drawing an age strength-cement dosage relationship curve; obtaining an EDTA titration standard curve of return grout in the case of different cement dosages by means of trails; sampling cement-soil return grout at a grout return port for a high-pressure jet-grouted pile, and determining the corresponding mass m1 of cement in a quantified cement-soil return grout sample; monitoring a jet grout flow rate Q and a return grout flow rate V2 during on-site construction; obtaining the density of the cement-soil return grout sample; obtaining the mass m2 of the dried cement-soil return grout sample; calculating the mass M6 of cement in a pile body; and calculating the dosage of the cement in the pile body, predicting the unconfined compression strength of the pile body at different ages, and determining whether design requirements are met. The accurate prediction of the age strength of a pile body is realized by means of an age-strength standard curve of test blocks having different cement dosages, which is of significant practical importance for predicting the construction quality of a high-pressure jet-grouted pile.

The invention provides a method and system for predicting the pile-forming strength of a cement-soil mixing pile based on integrated learning, and the method comprises the steps: firstly, obtaining a parameter correlation set which comprises the working condition parameters of mixing equipment, the ratio parameters of cement-soil mass and the geological condition parameters of a construction site in the whole construction period of the cement-soil mixing pile, and then constructing a parameter correlation mode; generating a first association mode of the working condition and the matching parameter and a second association mode of the matching and the geological condition parameter, generating a feature association link of an integrated learning framework according to the association modes, and calling the adaptive integrated learning framework to perform multi-mode collaborative prediction on the link to obtain a pile forming strength change trend; and finally, a pile forming quality evaluation link is generated based on the pile forming strength change trend and the preset interval, so that the strength change can be accurately predicted, construction is guided, and the pile forming quality is improved.

The invention relates to the technical field of intelligent civil engineering, in particular to an eleven-shaft stirring cement soil diaphragm wall construction method and system. The method comprises the following steps: acquiring formation resistance data and water content data; performing resistance gradient fitting profile processing according to the formation resistance data to obtain an initial geologic model; performing field domain coupling updating on the initial geologic model according to the water content data to obtain a stratum model; performing hierarchical slurry demand processing on the stratum model to obtain hierarchical slurry demand data; performing slurry real-time flow monitoring according to the hierarchical slurry demand data to obtain real-time monitoring data; performing slurry diffusion radius calculation according to the real-time monitoring data to obtain slurry diffusion radius data; and performing uniformity judgment on the slurry diffusion radius data to obtain slurry uniformity data. According to the method, through geologic model reconstruction based on formation resistance and water content data and in combination with uniformity judgment, fine control over multi-shaft stirring grouting and homogeneous forming of an anti-seepage wall structure are achieved.

The invention relates to the technical field of cement soil compaction pile hole forming construction, and discloses a cement soil compaction pile hole forming construction device which comprises a positioning mold and a carrying frame, the carrying frame is located above the positioning mold, a cleaning device is arranged on the surface of the positioning mold, and the cleaning device comprises a positioning cylinder and a gathering cover. According to the drilling device, soil overflowing from drilling is limited in a fixed area through the guide cover and the gathering cover, the soil is prevented from splashing all around to pollute a construction site, the follow-up manual cleaning workload is reduced, meanwhile, the soil is rapidly guided into the guide frame through the design of centrifugal force and the dip angle of the stirring blades, the continuous operation mode of drilling and cleaning at the same time is achieved, and the construction efficiency is improved; and meanwhile, the cleaned soil is collected, subsequent reutilization of soil resources is facilitated, a motor is guided to drive a conveying belt to discharge the soil from the tail end of a guide frame, the soil is accumulated outside a construction area, safe construction is ensured, and meanwhile subsequent cleaning operation is facilitated.

The invention discloses an intelligent cement-soil mixing pile machine, which relates to the technical field of building equipment and comprises a pile machine intelligent edge terminal, an intelligent slurrying station subsystem and a cloud platform management subsystem, the pile machine intelligent edge terminal is integrated on a cement-soil mixing pile machine; the intelligent slurrying station subsystem is located on a construction site; the cloud platform management subsystem is deployed in a remote server; data connection is established between the pile machine intelligent edge terminal and the intelligent pulping station subsystem through a first wireless communication network, and the first wireless communication network is a LoRa long-distance radio micropower wireless network; data connection is established between the pile machine intelligent edge terminal and the cloud platform management subsystem through a second wireless communication network. According to the invention, the crossing from a'fixed formula 'to a'dynamic formula' is realized, the quality uniformity and reliability of the pile body are ensured, the ineffective operation is reduced through optimal control, and the cost of materials such as cement and the like can be obviously saved.

The invention relates to the field of foundation pit supporting design, and provides a method for determining the width of a cement-soil wall composite wall under the water collection and exposed drainage conditions. The method comprises the following steps: acquiring basic physical and mechanical indexes and cement-soil wall parameters of each soil layer in a foundation pit supporting depth range; primarily selecting the built-in depth of the cement-soil wall composite wall body; then calculating active soil pressure of each soil layer on the outer side of the cement-soil wall composite wall and passive soil pressure of each soil layer on the inner side of the cement-soil wall composite wall; calculating an active soil pressure resultant force of each soil layer on the outer side of the cement-soil wall composite wall and a vertical distance from an action point to a wall toe; calculating the passive soil pressure resultant force of each soil layer on the inner side of the cement-soil wall composite wall and the vertical distance from an action point to a wall toe; and finally, calculating and judging the width of the cement-soil wall composite wall body. The method for solving the active soil pressure and the passive soil pressure of the soil layers on the two sides of the cement-soil wall composite wall under the influence of seepage force is provided, the width of the cement-soil wall composite wall can be quantitatively calculated, and the method is more scientific and accurate.

The invention discloses a composite reinforcing method and device for a soft soil levee slope based on prestressed corrugated pile emergency support, and the method comprises the steps: investigating a to-be-reinforced levee slope and engineering geological conditions in an influence range of the to-be-reinforced levee slope, and obtaining investigation data; calculating by setting a slope stability analysis strategy to obtain a natural state safety coefficient; the state of the to-be-reinforced levee slope is judged, and a state result is obtained; according to a state result, a cement-soil mixing pile temporary construction platform, a composite reinforcing area, a prestress wave-shaped pile and a three-dimensional drainage system are designed; and performing construction preparation and reinforcement construction according to the design scheme. The problems of temporary emergency and permanent splitting, construction disturbance instability, high cost, river channel occupation, difficulty in considering efficiency and ecology and the like in the prior art are solved.

The utility model relates to the technical field of groove wall reinforcing construction, in particular to a double-wheel stirring drilling machine which comprises an engineering vehicle and a drilling machine base, a machine frame is arranged on one side of the drilling machine base, a drilling rod is arranged on one side of the machine frame, a lifting machine corresponding to the drilling rod is arranged on the machine frame, a groove milling machine is arranged at the bottom of the drilling rod, and an inclinometer is arranged on the groove milling machine. At least two groups of milling wheels are arranged on the slot milling machine; the bottom of the rack is hinged to the drilling machine base, a connecting frame is arranged on one side of the middle of the rack, a stabilizing rod is arranged between the connecting frame and the drilling machine base, a steel cable is connected to the top end of the drilling rod, and a winch is arranged on one side of the engineering truck. According to the utility model, the milling wheel is used for forming a cement-soil mixing pile with a rectangular groove section in a horizontal axial rotary mixing manner, and a single-shaft or multi-shaft mixing drilling tool is replaced to vertically rotate, so that a cylindrical cement-soil mixing pile is formed, and a wavy surface is prevented from appearing after an underground continuous wall is poured and formed.

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.

The utility model discloses a flexible protective sleeve device for improving the recovery rate of H-shaped steel of an equal-thickness cement-soil wall, and relates to the field of pile loading and unloading equipment. The flexible protective sleeve device for improving the recovery rate of the H-shaped steel of the equal-thickness cement-soil wall comprises a flexible protective sleeve body capable of being arranged on the H-shaped steel in a sleeving mode, a hard fixed protective base and a hard plastic blade foot connected to the bottom end of the hard fixed protective base. An H-shaped protection fixing clamping groove used for clamping the bottom of H-shaped steel is formed in the top of the hard fixing protection base, and the bottom of the flexible protection sleeve body is connected to the top of the hard fixing protection base. According to the flexible protective sleeve device for improving the recovery rate of the H-shaped steel of the equal-thickness cement-soil wall, the influence of insertion and recovery of the H-shaped steel into the equal-thickness cement-soil wall can be reduced, and the purpose of improving the quality of the recovered H-shaped steel is achieved.

The application belongs to the technical field of cement soil preparation, and particularly relates to a composite cement soil prepared from seawater, nano-silicon dioxide and polyvinyl alcohol fiber and a preparation method thereof, which comprises 63-70% of dry soil powder, 9-10% of Portland cement, 1.8-2.2% of nano-silicon dioxide, 0.6-1.2% of polyvinyl alcohol fiber, 0.2% of dispersant and 16.4-25.4% of seawater. The composite cement soil can not only significantly reduce the dependence on fresh water resources, but also effectively solve the problems of seawater corrosion and deterioration caused by fatigue cracks due to long-term cyclic loading, thereby significantly improving the mechanical strength of the cement soil foundation and prolonging the service life of the cement soil foundation in the coastal environment, and the composite cement soil also has high economic benefits. The synergistic effect of the nano-silicon dioxide and the polyvinyl alcohol fiber significantly enhances the mechanical properties, crack resistance and seawater corrosion resistance of the cement soil, and effectively inhibits the brittle failure of the cement soil, so that the cement soil can be stably applied in the coastal soft soil foundation reinforcement engineering for a long time.

The invention relates to the technical field of fan foundations, and provides a fan foundation pile foundation construction method which comprises the following steps that a cement soil mixing pile is constructed in the center of a prestressed pipe pile, and the diameter of the cement soil mixing pile is larger than that of the prestressed pipe pile; during construction of the cement-soil mixing pile, thin slurry is sprayed during downward drilling for the first time, thick slurry is synchronously sprayed during drilling lifting, the repeated stirring frequency is not less than 2 times, and the cement-soil mixing pile with the pile bottom elevation not higher than the designed bottom elevation of the prestressed pipe pile is formed; before the cement soil mixing piles are solidified, the prestressed pipe piles are pressed into the designed depth; the pile sinking problem in high underground water and dense sandy soil geology can be solved, the physical and mechanical properties of soil around the pile are effectively improved by constructing the cement soil mixing pile with the larger diameter in the center of the prestressed pipe pile, the problem that pile sinking cannot be achieved under the dense sandy soil geology condition can be effectively solved, and the pile sinking method is suitable for various soil layers and hard soil layers containing dense sandy soil and the like; and the application range of the prestressed pipe pile is widened.

The invention discloses an inner and outer core variable cross-section composite pile and a construction method thereof.The inner and outer core variable cross-section composite pile comprises an outer core and an inner core, the inner core is a precast concrete pile and comprises a variable cross-section section located on the upper portion and at least one uniform cross-section section located on the lower portion, and the cross-section area of the variable cross-section section is decreased from top to bottom; the variable-section sections and the uniform-section sections are connected through connecting assemblies, every two adjacent uniform-section sections are connected through connecting assemblies, the outer core is a cement-soil mixing pile which is formed in situ on site, part of the section sections of the cement-soil mixing pile are in an expanding mode, and the central axis of the inner core coincides with the central axis of the outer core. The bearing performance, the economical and environment-friendly performance and the construction quality and efficiency of the pile foundation are comprehensively improved.

1. Name of the Design Product: Middle Layer Cement Soil Mixer (S-TRD13). 2. Use of the Design Product: Mix and stir curing materials such as cement with the original soil to form a solid wall. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photograph Most Indicating the Design Key Points: Perspective view.

The present application relates to a kind of soft soil reconsolidation under dynamic load processing method, solve the vibration drainage of existing soft soil in consolidation method vibration frame structure, it is difficult to manufacture vibration support foundation, construction is inconvenient, the problem of destruction of foundation after recovery.The method mixes cement in upper layer soil, forms cement soil base layer with strength in C5-C15;Uniformly set water pipe on cement soil base layer;Vibration rod is set in each water pipe;Place stack load plate on cement soil base layer, and vibration machine is fixed on stack load plate;Vibration machine fixed on stack load plate vibrates, drives vibration rod in water pipe, and free water generated after vibration is collected in water pipe, water in water pipe is discharged using water suction pump, until no free water is discharged after a period of vibration operation.The present application solves the problem that general vibration machine cannot effectively vibrate deep layer soil, and removes free water generated after vibration from soil, simultaneously, promotes soil particle to rearrange, and enhances soil compactness.

The utility model belongs to municipal engineering technical field, concretely relates to a kind of shallow soft soil subgrade treatment combination structure in narrow site, comprising: replacement boundary line, roadbed replacement base layer, replacement demarcation line, ground line, excavation replacement slope line, cement soil mixing pile solid pile, cement soil mixing pile empty pile, cement solidification area and replacement granular material.Excavation replacement slope line starts from replacement demarcation line, and ends in replacement boundary line;Cement soil mixing pile solid pile is located below the area inside replacement boundary line road, its pile bottom is below replacement demarcation line, and pile top is cut off in excavation replacement slope line;Cement soil mixing pile empty pile is only as the "virtual section" that cement soil mixing pile solid pile body extends upwards;Cement solidification area is the area that replacement boundary line, cement soil mixing pile solid pile bottom and excavation replacement slope line, ground line are enclosed to form.The utility model can reduce the range of slope excavation, reduce the influence of excavation replacement subgrade treatment to surrounding environment and building structures.

The present invention relates to the field of water conservancy project dams, and in particular to a construction method for a composite flexible anti-seepage wall for dams, comprising: step one, measurement and positioning; step two, equipment placement; step three, wall construction, forming a continuous cement-soil underground wall of equal thickness; step four, inserting an anti-seepage core plate; the anti-seepage core plate is composed of a main body, and a plurality of optical fiber bundles are distributed on the interior or outer surface of the main body. These optical fibers extend downward along the length of the main body and can monitor environmental changes of the main body and the surrounding underground continuous wall. For winding dams, a continuous and uniform composite flexible anti-seepage wall for dams can be formed, and the anti-erosion and anti-disturbance capabilities of the anti-seepage wall can be improved, and the anti-seepage durability can be improved. At the same time, the continuous wall can be monitored for leakage areas through the anti-seepage core plate, providing early warning for timely and effective preventive measures.

The utility model discloses a structural steel plate cement soil stirring wall structure for a deep foundation pit. The structural steel plate cement soil stirring wall structure comprises a three-axis cement soil stirring wall, H-shaped steel and U-shaped steel plate piles. Wherein the three-axis cement soil stirring wall is of a three-circle lap joint pile body structure, and the H-shaped steel and the U-shaped steel sheet piles are arranged in the three-axis cement soil stirring wall. A plurality of profile steels and a plurality of U-shaped steel sheet piles are uniformly distributed in the three-axis cement-soil stirring wall; convex spigots are arranged on the H-shaped steel, concave spigots are arranged on the U-shaped steel sheet piles, and the H-shaped steel and the U-shaped steel sheet piles are connected through the convex spigots and the concave spigots to form a continuous steel sheet pile combination. According to the U-shaped steel sheet pile, the concave spigots are meshed with the convex spigots of the H-shaped steel, so that the problem that the local shear bearing capacity of a traditional SMW construction method pile cannot be calculated completely due to the fact that the strength of cement soil is too low is solved, and meanwhile the problem that the cement soil between the steel sections is extruded out due to the pressure effect of water and soil on the outer side is solved.