576results about "Embankments" patented technology

The invention relates to the technical field of earthwork compaction, and discloses a pipe ditch backfilling and tamping system based on excavator modification. The system comprises an earthwork condition dynamic sensing module which captures a bucket tooth track, a hydraulic oil cylinder pressure pulse and a soil mass vibration spectrum in real time and combines a historical database to construct a model to output a theoretical compaction degree curve; a multi-source compaction difference analysis module performs three-dimensional deviation detection on the theoretical curve and the actual settlement volume data to generate a construction grid-level compaction difference tensor; the defect area association mapping module inputs the tensor into a geological topology analysis network, generates a loose defect propagation path probability cloud chart by combining soil parameters and identifies weak sections; and the tamping strategy self-adaptive configuration module automatically sets operation parameters according to the cloud picture, activates high-precision monitoring on a high-probability defect section, and applies a dynamic excitation force test on adjacent grids, so that intelligent management and control of the backfilling and compacting process are realized.

The invention belongs to the technical field of steel sheet piles, and discloses a steel sheet pile for compensating stratum loss during pile pulling and a construction method.The steel sheet pile comprises a plurality of steel sheet pile units, and each steel sheet pile unit comprises a plurality of steel sheet piles; the foundation pit sides of the steel sheet pile units are connected with a plurality of compensation bags, and grouting systems are arranged on the foundation pit sides of the compensation bags. The foundation pit side of the steel sheet pile is coated with viscous grease, the side, facing the steel sheet pile, of the compensation bag is coated with pressure-sensitive adhesive, and the compensation bag is temporarily connected with the steel sheet pile; the grouting system comprises a main grouting pipe, the bottom of the main grouting pipe is connected with a horizontal grouting pipe, the side, facing the steel sheet pile, of the horizontal grouting pipe is connected with a plurality of flow dividing pipes, and the flow dividing pipes correspond to the compensation bags. A vertical branch pipe is upwards separated from the middle position of the flow dividing pipe, and is connected with a grouting connector at the bottom end of the corresponding compensation bag; the tail end of the flow dividing pipe is downwards divided into an inclined grouting pipeline, and the inclined grouting pipeline faces the lower portion of the steel sheet pile. The technical problem that filling is not timely due to the fact that grouting pipes are installed to fill gaps after steel sheet piles are pulled out in the prior art is solved.

The invention belongs to the technical field of bridge engineering, and particularly relates to a deepwater lock catch steel pipe pile cofferdam construction method which comprises the following steps: construction preparation: delimiting a steel pipe pile cofferdam area; drilling and groove milling are carried out along the steel pipe pile cofferdam area to form a cofferdam groove, and sandy soil is backfilled in the cofferdam groove; a guide device is lowered along the bored pile steel casing, and steel pipe piles are inserted one by one to form a steel pipe pile cofferdam; a plurality of inner supporting systems are assembled; a covering layer is excavated on the inner side of the steel pipe pile cofferdam to the designed elevation; underwater grouting is conducted on the inner sides and the outer sides of the steel pipe piles located in the cofferdam grooves; the multiple inner supporting systems are sequentially lowered to the designed elevation; a gap between each enclosing purlin structure and the steel pipe pile is checked; the bottom of the foundation pit is cleaned, water is pumped layer by layer, and concrete is poured between the enclosing purlin structure and the steel pipe piles till water pumping in the cofferdam is completed; the bearing platform / pier body is constructed, and backwater of the corresponding inner supporting systems is sequentially removed along with construction of the bearing platform / pier body till water flows out of the bearing platform / pier body; and dismantling the steel pipe pile cofferdam.

The invention discloses a river and lake sludge dewatering and curing ecological bank protection process. Ecological bank protection construction is achieved through in-situ resourceful treatment of sludge. The process comprises the following steps: firstly, pressing natural wood piles into the bottom of a bank slope to form a comb-shaped anti-sliding bent frame, and paving high-strength permeable geotextile pipe bags between the piles and the bank slope; bottom mud is extracted by adopting mud suction equipment, is modified by a flocculating agent and then is injected into a tubular bag in a layered manner, and gravity dehydration is completed by utilizing the permeable characteristic of tubular bag fabric; the tops of the pipe bags are backfilled with stacking materials for graded stacking, and solidification is accelerated through external pressurization to form a stable bank protection filling body; and finally, the surface layer is covered with planting soil, moisture-proof plants are planted, and the composite revetment with the permeation drainage function and the ecological function is constructed. Compared with a traditional technology, the technology effectively solves the problems of bottom mud outward transportation pollution and resource waste through triple synergy of geotextile tube bag gravity dehydration, natural timber pile stability enhancement, building body strength improvement through graded stacking and loading and the like, and the formed revetment has ecological restoration and landscape functions. The method is suitable for ecological restoration of rivers and lakes, wetland reconstruction and waterfront environment treatment, and has the comprehensive advantages of convenience in construction, environmental friendliness, economy and high efficiency.

A side grip pile driver for driving elongated objects into a ground surface comprising: a body for attaching the pile driver to a working machine; a first and second jaw members each jaw member having a clamping interface for clamping onto the side of an object to be driven; and a driving means arranged to move at least one of the jaw members, wherein each jaw member has a jaw arms and a gripping head, wherein the jaw arm is attached to the body and the gripping head, the gripping head providing the clamping interface, the jaw arm being attached to the gripping head via an elastomer member; wherein at least one of the gripping heads of the jaw members comprises a vibrator device for vibrating the gripping head such that the gripping head is couplable to the object in vibratory engagement.

The invention belongs to the technical field of solid waste recycling and controllable low-strength material production, and particularly discloses a method for preparing a controllable low-strength material from lithium slag and shield muck. The controllable low-strength material with the fluidity larger than 170 mm and the 28d unconfined compressive strength of 0.3-8 MPa is successfully developed by taking the lithium slag instead of traditional cement as a cementing material, taking the shield muck as a fine aggregate and taking the quicklime as an alkaline activator and adding a polycarboxylic acid type high-efficiency water reducing agent to adjust the fluidity through reasonable proportioning, and the controllable low-strength material with the fluidity larger than 170 mm and the 28d unconfined compressive strength of 0.3-8 MPa is prepared. Under the condition that vibration is not needed, narrow construction areas can be automatically filled, and most backfill projects are met. The cement-free cementing material developed by exciting the lithium slag through the alkaline exciting agent can replace cement, the material cost is effectively reduced, on the other hand, a large amount of lithium slag and shield muck are secondarily utilized, solid waste recycling is promoted, environmental pollution is reduced, and high economic benefits and environmental benefits are achieved.

The invention provides a hydraulic reclamation area storage yard foundation treatment construction method which comprises the steps that a treatment area is divided into a consolidated hydraulic reclamation sand area, a storage sand area and a new hydraulic reclamation sand area according to the formation time and compactness difference of strata, a three-dimensional drainage system is laid in the new hydraulic reclamation sand area and comprises a horizontal permeable gabion wall and a vertical drainage plate, and a gravity drainage channel is formed; the process of forming a drainage channel through vibroflotation and then carrying out dynamic compaction and densification is adopted in a consolidated area, the process of alternately implementing vibroflotation and dynamic compaction is adopted in a sand stockpiling area, the process of carrying out local vibroflotation reinforcement after layered dynamic compaction and pre-pressing is adopted in a new hydraulic reclamation area, and vibroflotation and dynamic compaction construction parameters are dynamically fed back and adjusted by monitoring gravel data. The foundation treatment problem of hydraulic reclamation areas formed in different years is solved.

The invention discloses a dredged mud upper and lower part double-face combined vacuum consolidation drainage method, which comprises the following specific implementation processes: laying a horizontal sand bag containing a PVC (Polyvinyl Chloride) pipe and a vertical drainage pipe at the bottom of a cofferdam foundation pit to serve as a bottom drainage system, blowing and filling dredged mud in a layered manner, controlling the thickness and the water content of each layer, and when the water content of a soil body is lower than twice liquid limit, stopping drainage; starting the bottom vacuum water pumping device to perform preliminary water drainage, inserting straw bundles into the soil body through hollow pipes with bottom covers to form a vertical water drainage structure after the strength of the soil body meets the requirement, sequentially laying geotechnical cloth, a straw woven blanket, a PVC water drainage pipe network and a sealing film on the top to construct a top vacuum system, and finally synchronously starting the top vacuum water pumping device and the bottom vacuum water pumping device. The vacuum difference is controlled by adjusting the ventilation device, and upper and lower double-face combined vacuum consolidation drainage is achieved. The drainage consolidation of the dredged mud is effectively accelerated, the treatment efficiency is improved, and the drainage effect is enhanced through precise control over the vacuum degree and application of materials such as straw.

The invention relates to a water and land construction rapid filling method suitable for a cofferdam with cohesive soil at a soil taking point. The water and land construction rapid filling method comprises the following steps of A, underwater throwing filling, B, overwater turning filling and C, land filling of a dam core. Water throwing and land throwing are combined, cofferdam forming is accelerated, inland river conventional equipment is adopted for overwater construction, construction organization is facilitated, adopted dredgers are backhoe dredgers and grab dredgers which are commonly used for earth cutting in inland rivers, and the ships are shallow in draught, convenient to transport in the inland rivers, free of weather influence, capable of working continuously, capable of saving the construction period, capable of reducing soil disturbance and convenient to throw and fill water. The overall stability of the cofferdam can be improved, earthwork balance is achieved, cost is saved, environment friendliness is achieved, and good social and economic benefits are achieved.

The invention discloses a multifunctional multi-anchor plate pile wharf structure suitable for deepwater berth and a construction method thereof, belongs to the technical field of port engineering, and solves the problems that the section of a deepwater berth plate pile wall structure is too large, deformation control is difficult, and the synergism of an anchorage system is poor. The wharf structure comprises a front sheet pile of the front sheet pile wall structure and a front track beam arranged on the front sheet pile. The pull rod system is arranged between a pavement structure and a pool bottom elevation, at least two common layered pull rods and a multifunctional pull rod are sequentially arranged at intervals from bottom to top, one end of each common layered pull rod is connected to a front sheet pile, and one end of each multifunctional pull rod is connected to a front track beam. The anchorage system comprises at least two common layered anchorage bodies and a multifunctional anchorage body, the common layered anchorage bodies are correspondingly connected with the common layered pull rods, the multifunctional anchorage body is composed of a rear track beam and a rear track beam pile, and the rear track beam is connected with the other end of the multifunctional pull rod. The wharf structure is mainly used for deepwater berth wharf construction, multi-anchor support can be provided, and track beam displacement can be coordinated.

The invention relates to the technical field of building construction, and provides a foam light soil construction method and a roadbed structure, the construction method comprises the following steps: excavating a foundation pit, cutting a slope at an old road slope on one side of an original roadbed, and digging steps and a base; a baffle is vertically arranged, a baffle foundation is poured on the other side, opposite to the steps, of the foundation pit, the baffle is vertically arranged, and a filling area is defined; and layered filling is conducted, specifically, after the baffles are erected, foam light soil is filled into the filling area in a layered mode based on the height of each filling layer. Through the arrangement, the vertical additional stress of high fill construction on a foundation can be remarkably reduced, the post-construction settlement problem caused by overlarge self weight of a traditional material is effectively relieved, meanwhile, due to the characteristics that the foam light soil is high in flowability and can be used for pumping construction, the operation process is simplified, dependence on large-scale compaction equipment is reduced, the construction period is shortened, and the construction cost is reduced. The environmental influence and the cost caused by excavation and transportation of earthwork are reduced, and the reliability and the economical efficiency of roadbed widening engineering are realized.

The invention discloses a preparation method and application of a compaction-free solid waste polymerization roadbed filler constructed by adopting a dump filling method, belongs to the field of high-value and large-scale utilization of solid waste building materials, and particularly relates to a preparation method and a construction process of the compaction-free solid waste polymerization roadbed filler (comprising construction waste and tunnel excavation fragments) constructed by adopting the dump filling method. Large-particle-size building waste fragments and an early-strength solid waste-based cementing material are polymerized through a throwing and filling method, compaction-free and vibration-free construction is achieved through the self-leveling and self-compacting characteristics of cementing material slurry, vertical layered pouring can be achieved, and high-valued and large-scale utilization of solid waste and engineering economy are both considered. According to the present invention, the self-leveling and self-compacting characteristics are provided, the characteristics of the slurry are obtained through the preparation method, the ratio design in the preparation method is important, and the experiment support is provided, such that the ratio design and the experiment process and data are required;

The invention relates to the technical field of damming, in particular to tailing distributing and damming equipment which comprises an integrated frame, a discharging mechanism, a flow dividing unit and a driving unit. According to the method, the laminated screen and the hydrocyclone work cooperatively to treat the tailing slurry, the coarse particle tailing slurry, the medium particle tailing slurry and the fine particle tailing slurry are formed, and the three kinds of tailing slurry are discharged in sequence, so that coarse particles are accumulated close to a dam body to form a stable dam body; medium particle tailing slurry and fine particle tailing slurry are accumulated far away from a dam body to form an impermeable layer and ballasting, the stability of the dam body is improved through the separated material conveying and damming mode, impact of the tailing slurry is reduced through the flow dividing unit, and the moving track of the integrated frame is in a broken line shape through the driving unit. The problem that the stability of the dam body is affected by impact pits formed by excessive impact of the tailing slurry on the surface of the dam body is solved, meanwhile, the tailing slurry is evenly distributed, and deposition is promoted.

The invention discloses an adjustable composite curing agent for fluid stabilized soil as well as a preparation method and application thereof, and belongs to the technical field of civil engineering materials. The technical scheme adopted by the invention is as follows: the adjustable composite curing agent for the flow-state cured soil comprises the following components in percentage by weight: 50-70% of a gel base material, 10-20% of a curing agent, 1-5% of a curing agent and 1-5% of a curing agent, 8-12% of an exciting agent; 5-8% of a function regulator; 15-25% of a filling material; wherein the gelling base material comprises 15-25% of ordinary Portland cement, 10-20% of steel slag micro powder, 10-15% of fly ash and 5-10% of coal gangue powder; the exciting agent comprises 4-6% of desulfurized gypsum, 2-4% of silica fume and 2-3% of sodium carbonate; by optimizing the ratio of the gelling base material, the excitant, the function regulator and the filler and combining with a specific raw material pretreatment process, the working performance of the flow-state solidified soil is ensured, meanwhile, the strength is precisely regulated and controlled, and the flow-state solidified soil has the advantages of being low in cost, high in solid waste utilization rate, adjustable in performance and capable of meeting municipal engineering requirements.

The utility model provides a tailing slurry discharge device which comprises a fixing part, a buffer plate and a connecting part, the fixing part is used for being fixedly connected with an ore drawing pipe, one end of the connecting part is connected with the fixing part, and the other end of the connecting part is connected with the buffer plate; the buffering plate is arranged between the ore drawing pipe and the beach face of the tailing dam in a suspended mode and arranged below an opening of the ore drawing pipe, the horizontal highest point of the buffering plate is arranged on the orthographic projection extension line of the axis of the ore drawing pipe on the buffering plate, a plurality of through holes are formed in the buffering plate, and when tailing slurry is discharged through the ore drawing pipe, under the action of gravity, the tailing slurry impacts the buffering plate and is borne by the buffering plate. The buffering plate is arranged, so that tailing slurry can be dispersed by the buffering plate and discharged downwards along the through hole and the slope of the buffering plate, the potential energy of tailing discharging is dispersed, a beach face scouring pit cannot be formed, and the good scattering and scattering effect and the uniform deposition effect are achieved.

The invention discloses a rectangular pipe gallery layered backfill soil monitoring method and monitoring system, and belongs to the technical field of municipal infrastructure construction monitoring. Comprising the following steps: delimiting a monitoring section for layered backfilling according to a pipe gallery structure; before backfilling of each layer, a sensor array is arranged along the cross section and the longitudinal section of the pipe gallery according to a gridding rule; collecting reference parameters of the undisturbed soil and the first layer of backfill soil, and performing precision verification; after each layer of backfill is completed, actual measurement parameters of backfill soil of the layer are collected in real time and compared with the collected reference data, and after precision verification is carried out, the actual measurement parameters are uploaded to the central processing unit; on the basis of reference data uploaded in real time, the compaction degree evolution model and the local settlement prediction model are input after preprocessing, layered quality scores are generated and associated with a grade table, and construction suggestions are output. According to the method, double dynamic analysis of the compaction degree evolution model and the local settlement prediction model is combined, and full-process real-time monitoring of the dry density, the settlement amount and the load stress in the layered backfilling process is achieved.

The invention discloses a ground source heat pump buried pipe backfilling compactness real-time monitoring method, and relates to the technical field of ground source heat pump system construction quality control. The method comprises the following steps: acquiring grouting port pressure time sequence data Pin (t), measuring point pore pressure time sequence data Pi (t), slurry density rho and grouting port space coordinates in real time, extracting pressure wave propagation time to calculate the wave velocity, constructing a physical model for describing the corresponding relation between the wave velocity vp and the compactness D, inverting the measuring point compactness, and calculating the density of the grouting port. And a three-dimensional compactness distribution field is generated through spatial interpolation to identify a defect area, and after defect coordinates are converted into global coordinates, the grout supplementing amount and the grouting pressure are calculated, so that directional grout supplementing is achieved. The method is mainly used for real-time monitoring of compactness, accurate defect recognition and targeted reinforcement in ground source heat pump buried pipe backfilling construction, and construction quality is guaranteed.

The invention provides an excavation and backfill prediction method and system for plateau airport flood control construction based on landform scanning, and the method comprises the steps: collecting three-dimensional landform point cloud data and image data based on a plurality of scanning devices, and constructing a three-dimensional landform model of a construction region; based on historical rainfall data and climate characteristics of the construction area, rainfall simulation is carried out on the three-dimensional landform model to determine influence performance of rainfall on all positions in the construction area, and a to-be-excavated area, a to-be-backfilled area and corresponding engineering indexes are determined in combination with the flood control design requirements of the plateau airport and the construction layout of the airport; and according to the three-dimensional landform model and the engineering indexes of the to-be-excavated and to-be-backfilled areas, respectively predicting the construction engineering amount of each to-be-excavated and to-be-backfilled area, and in combination with the position information corresponding to the to-be-excavated and to-be-backfilled areas and the related analysis data, generating a construction prediction report and sending the report to an engineering manager. The method achieves the reasonable planning and prediction of the flood control construction of the plateau airport.

The invention discloses a wharf dismantling and backfilling settlement control construction method based on real-time monitoring, and belongs to the technical field of wharf engineering construction and settlement control. Existing wharf dismantling and backfilling construction lacks a systematic settlement control process and does not depend on real-time monitoring to realize dynamic feedback, so that the construction quality and the settlement control effect are poor. According to the method, partition division, threshold value determination and monitoring point position setting are prepared before construction, partition and segmented dismantling, layered backfill compaction, settlement dynamic adjustment and circulating construction are conducted, settlement and horizontal displacement data are collected through real-time monitoring in the whole process and transmitted to a data processing end, and construction parameters are adjusted and areas exceeding the threshold value are processed according to the data. The method is mainly used for accurately controlling settlement in wharf dismantling and backfilling construction, guaranteeing construction quality and safety of surrounding buildings and underground pipelines, and improving construction orderliness and safety.

This invention discloses a gabion reinforcement system for preventing damage to backfill dumps in open-pit mines, comprising: an inner dump, a base, gabions, backfill material, and inclinometers. The inner dump is used for stockpiling the backfill material. The base is the exposed surface after the open-pit mine is completed, serving as supporting soil for subsequent dumping operations and providing geological conditions for laying the gabions. The gabions are laid on the base surface to maintain and reinforce the multi-layered slope structure composed of the backfill material. The backfill material is transported to the inner dump by dump trucks and dumped therein. The inclinometers are used for subsequent monitoring of soil displacement. This invention significantly improves the shear strength of the backfill material, thereby stabilizing the slope of the dump, effectively suppressing the horizontal deformation of the dump steps along the slope direction, and avoiding potential deformation and large-scale landslides that may occur on the dump slope under external erosion.

The present invention relates to the technical field of water interception and drainage structures, and discloses a single-channel water interception and drainage structure that can be quickly constructed, including a water inlet dam, an intermediate dam, a water outlet dam and at least one drainage pipe arranged in a water channel. Along the flow direction of water in the water channel, the water inlet dam, the intermediate dam and the water outlet dam are arranged in sequence and at intervals, and the water channel has a water inlet area, a water isolation area and a water stop area; the drainage pipe has a water inlet end and a drainage end, and the drainage pipe passes through the water inlet dam, the intermediate dam and the water outlet dam in sequence, and the water inlet end extends into the water inlet area, the drainage pipe extends to the outside of the water channel, and the drainage end extends to the drainage area, the water in the water inlet area enters the drainage pipe from the water inlet end, is led to the drainage area by the drainage pipe, and is discharged into the drainage area by the drainage end; the water inlet end has a water inlet, and the water inlet is provided with a filter layer formed by weaving metal wire strips.

The present invention relates to a method for treating deep soft soil in an earth-rock dam foundation and an earth-rock dam. The method for treating deep soft soil in an earth-rock dam foundation comprises determining a dam foundation excavation surface, wherein the dam foundation excavation surface is generally trough-shaped, the trough bottom surface corresponds to the dam anti-seepage body and extends to below the soft soil layer, and the trough walls on the upper and downstream sides of the trough bottom surface are slopes inclined downward toward the trough bottom; before excavating the soft soil in the dam foundation, vibratory crushed stone piles are first constructed on the upper foundation upstream and downstream of the dam anti-seepage body, the pile holes pass through the dam foundation excavation surface, and only holes are drilled above the dam foundation excavation surface without backfilling with crushed stone, and only crushed stone is backfilled below the dam foundation excavation surface, forming crushed stone piles below the dam foundation excavation surface; if the soft soil below the excavation surface is not treated, the soft soil slope cannot be stabilized and construction is also very difficult; and generally, excavating deep soft soil is very difficult, so only after treatment with crushed stone piles can the stability of the excavated slope be guaranteed, and the core anti-seepage body of the dam can be placed on a non-soft soil foundation after excavation.

The invention discloses a construction method for excavating an upside-down well wall of a deep foundation pit under an eccentric compression working condition. The construction method is suitable for an asymmetric load scene that the soil covering height of one side of a vertical shaft is obviously larger than that of the other side of the vertical shaft. The method comprises the steps that firstly, grouting is conducted on the periphery of the shaft wall of a vertical shaft under the current ground, and a soil body reinforcing area is formed; then, a mouth locking ring beam is constructed at a shaft mouth of the vertical shaft, an upper structure comprising a retaining wall, a reverse pressing plate, a retaining wall ring beam and a plate support is upwards constructed on the mouth locking ring beam, and soil covering side earthwork is synchronously backfilled to the level ground elevation in the construction process; next, an upside-down well wall method is adopted for subsection downward excavation, an annular arch frame, angle braces and anchor rod supports are constructed after each section is excavated, and an upper ring beam and a lower ring beam are arranged at the horsehead position and connected with the adjacent arch frames through vertical supports; and finally, concrete bottom sealing is conducted on the shaft completion face. The anti-overturning moment is formed through the reverse pressing plate and synchronous backfilling, and the problem of well wall instability caused by eccentric loads is effectively solved in combination with a multi-stage supporting system.

The invention relates to the technical field of landslide disaster treatment, and discloses a cutting section landslide treatment method and structure based on a steel corrugated plate, which adopts an innovative combined structure of the steel corrugated plate and a reinforced concrete lining to realize advantage complementation of flexibility and rigidity; wherein the steel corrugated plate can effectively resist external soil pressure and flexibly absorb settlement deformation of a foundation by virtue of extremely high axial compressive strength and excellent deformation adaptive capacity, and meanwhile, the steel corrugated plate is used as a supporting template of a concrete structure, so that the aim of quickly implementing protection is fulfilled; the reinforced concrete lining greatly improves the overall rigidity and the shear strength of the structure, and the problem that a pure steel structure is prone to local instability is fundamentally avoided; and the two synergistically form a strong retaining system, so that the treatment effect is lasting and stable, and potential safety hazards are thoroughly solved.

The present application relates to geotechnical engineering and geological disaster prevention technical field, specifically disclose a kind of combined bedrock reconstruction and slope modification multi-cladding layer slope and its construction method, the present application is strengthened by constructing cemented rock-embedded groove the binding force of slope and bedrock, form anti-sliding "structure pile" effect, control bedrock seepage passage, significantly improve the overall collaborative stability of slope-bedrock;In the process of layered filling, embedded cemented soil and rock interlayer body, constitute continuous, multi-level interlayer structure, enhance the integrity of structure, overcome the problem of localization of traditional supporting structure;By being arranged between cemented soil and rock interlayer body and conventional soil and rock mixture embedded cemented layer gravel drainage groove, realize multi-channel grading drainage and anti-seepage function in slope, effectively reduce pore pressure;Through conventional drainage facilities and the drainage structure inside slope cooperation, form "upper cut, surface guide, lower discharge, buffer" four-in-one composite drainage system, improve the anti-sliding performance and seepage control ability of slope.

The utility model relates to a soft soil foundation treatment combined structure of a riprap and reclamation transition section. The soft soil foundation treatment combined structure comprises a cofferdam area, the right side mud containing area of the cofferdam area is reinforced through vacuum preloading and ultrahigh heaped loading in a combined mode. A right cofferdam external expansion area is arranged between the right side of the cofferdam area and the mud containing area and is reinforced through vibro-replacement gravel piles. A left cofferdam external expansion area is arranged on the left side of the cofferdam area and is reinforced through high-pressure jet grouting piles. A direct filling area is arranged on the left side of the left cofferdam external expansion area and is reinforced through vibro-replacement gravel piles. A channel groove external expansion area is arranged on the left side of the direct filling area, and a variable-pile-length high-pressure jet grouting pile is adopted for reinforcement; a closed channel groove area is arranged on the left side of the channel groove external expansion area. According to the soft soil foundation treatment combined structure of the riprap and reclamation transition section, the rigidity of foundations in adjacent areas is in stable transition, and overall deformation coordination of settlement of the foundations after construction is guaranteed.

To provide a ground improvement method that forms a drainage channel from the upper surface side, instead of the slope surface, of a banking soil so as to form simply and strongly a drainage channel under the banked ground even in a narrow place in a mountainous area.SOLUTION: A ground improvement method according to the present invention includes: (1) providing a first excavation hole 1 by rotatively inserting an auger 10 from an upper surface of a banked ground in an underground direction and charging a drainage material 7 into the first excavation hole 1; then, (2) providing a second excavation hole 2 by rotatively inserting the auger 10 from the upper surface of the ground in the underground direction at a position in proximity to the first excavation hole 1 and charging the drainage material 7 into the second excavation hole 2; and (3) excavating a boundary region 3 between the first excavation hole 1 and the second excavation hole 2 by the auger 10 to communicate the first excavation hole 1 and the second excavation hole 2 with each other, and mixing the drainage material 7 in both holes to form a drainage 4.SELECTED DRAWING: Figure 2

The invention belongs to the technical field of foundation pit fat groove backfilling construction, and particularly relates to a flow state solidified soil filling body structure for an adjacent-water-depth foundation pit and a construction method of the flow state solidified soil filling body structure. The invention provides a flow-state solidified soil filling body structure. The flow-state solidified soil filling body structure comprises a backfilling body filled in a foundation pit fat groove area and an anti-seepage curtain arranged on the periphery of the foundation pit fat groove area. The backfill body sequentially comprises a horizontal impermeable layer, a flow-state solidified soil main body and a sealing layer from bottom to top, and a plurality of pieces of reinforced gridding cloth are horizontally arranged in the flow-state solidified soil main body; the anti-seepage curtain comprises a base layer structure and a main body structure from bottom to top, the base layer structure is formed by flow state solidified soil, and the main body structure comprises a vertical anti-seepage layer and flow state solidified soil layers arranged on the two surfaces of the vertical anti-seepage layer. According to the flow state solidified soil filling body structure for the adjacent-water-depth foundation pit, the anti-seepage performance is remarkably improved, uneven subsidence of a backfill structure is avoided, and long-term seepage prevention and stability of the surrounding environment of a building are guaranteed.

The invention belongs to the technical field of civil engineering filling, and particularly relates to a composite structure based on spoil reutilization and a construction method of the composite structure. In the composite structure, engineering spoil is improved and reconstructed, spoil resources are utilized on site, the utilization rate of the spoil reaches 90% or above, and the construction cost is reduced. The land occupation of a spoil yard is obviously reduced, the comprehensive cost of digging and filling soil is reduced, and the method has good engineering performance and can be widely applied to various foundation projects; meanwhile, one part of the engineering spoil is used for manufacturing building blocks, the blocking structure is built through the building blocks, the other part of the engineering spoil is used for manufacturing the flow state solidified body, and then the flow state solidified body is poured into the filling area of the blocking structure, so that the overall performance of the composite structure is optimized, the construction precision is high, and operation is easy and convenient.