50 results about "Differential sedimentation" patented technology

Provided are a land settlement measuring apparatus and a land settlement measuring system. The land settlement measuring apparatus includes a magnetic field detection unit, a microprocessor, and a containing unit. The magnetic field detection unit includes a plurality of magnetic field detection sensors that are separated from each other in a predetermined interval. The microprocessor calculates a differential settlement amount based on a magnetic field detection signal transmitted from the magnetic field detection unit, in the case where a change in the magnetic field is detected by the sensor. The containing unit contains the magnetic field detection unit and the microprocessor. The land settlement measuring system includes a magnetic field generation unit, a land settlement measuring apparatus, and a data logger. The magnetic field generation unit is disposed at a predetermined position of a ground to be adjacent to a hole which is perforated down to an unmovable layer. The land settlement measuring apparatus passes through the hole so that the one end thereof is fixed to the unmovable layer, the land settlement measuring apparatus measuring a differential settlement amount according to a change in the position of the magnetic field generation unit. The data logger stores a result of the measurement transmitted from the land settlement measuring apparatus. According to the configuration, it is possible to collectively measure a differential settlement amount of a surface of a settling layer and a differential settlement amount of the settling layer in one system and to obtain a more accurate value of the measurement.

The present invention relates to a new-type pile foundation. It can be extensively used for treating various soft ground bases of multistoried, high-rise and super high-rise industrial and civil buildings and road and bridge, etc. Its main technique is characterized by that (1), the plane arrangement form of piles adopts non-symmetrical units or symmetrical units to make combination; (2), it adopts a small quantity of long piles, these long piles mainly are placed in the positions bearing larger load under the column (or under the wall) or central position of symmetrical unit, its single pile is friction pile; (3), it has a lots of short piles, said short pile can be pipe-sinking pile, CFG pile, cement mixed pile or shaped pile; (4), it utilizes said short pile and soil to form the invented composite ground base, on its surface a layer of bedding sandstone is laid; and (5), its total safety degree is greater than 2, its total settlement is less than 50 mm and its difference settlement is less than 10 mm.

The invention relates to roadbed pile construction and particularly relates to a roadbed pile top settlement control method. A pile-net composite roadbed pile top differential settlement control method comprises the following steps: step 1: analyzing a road geological survey report; designing a pile net and an upper cushion layer; step 2: combining construction possible errors and subsequent site condition changes to carry out settlement risk estimation; step 3: designing a pile-net straining beam or a plate-strip concrete section and reinforcing bars; and step 4: finishing pile net, straining beam and cushion layer construction according to the sequence. The pile-net composite roadbed pile top differential settlement control method is generated from engineering practice of marine facies sludge soft soil roadbed treatment, and a long pile-net differential settlement problem is mainly solved.

The invention discloses a settling control method of a multi-pilot tunnel underneath bridge pile. The settling control method comprises the following steps: a monitoring point and a monitor are distributed on a field bridge pile; a multi-pilot tunnel is divided into different excavation areas; the percentages of influences on settling of the bridge pile by phased construction of the different excavation areas are obtained by a numerical value model and numerical value analysis software, and are multiplied by respective corresponding engineering standard values and added with analogy engineering experience values to obtain control numerical values in all construction phases; settling numerical values of the different excavation areas are obtained by using numerical value analog computation, and are used for determining grouting reinforcing areas with different grades; the grouting reinforcing areas with different grades are reinforced before excavation; field monitoring data is acquired in the field excavation process, and is compared with the control numerical values of all the construction phases; and the grouting intensity and the construction speed are adjusted according to real-time comparing results of the two. The settling control method can control the different settling, the total settling and the settling speed to guarantee the building safety.

The invention discloses a modular differential settlement accurate control device, including a model box frame. A variable speed motor is arranged on the base plate at the bottom of the model box frame, a first support plate is fixed on the top of the variable speed motor, screw lifts are correspondingly arranged on the upper surface of the first support plate, the output shaft of the variable speed motor passes through the first support plate and is connected to the corresponding screw lifts through a steering device, a second support plate is fixed on the top of the screw lifts, a test box covers on the periphery of the upper surface of the second support plate, two rows of side piers are fixed on both sides of the upper surface of the second support plate in the test box, modular movable units are arranged between the two rows of side piers, the lower ends of the modular movable units are connected with the screw lifts through the second support plate, and the upper surfaces of themodular movable units are paved with packing to be tested; and the variable speed motor is connected with an outside control system. The device can simulate actual deformation modes of a soft stratumunder the upper load, and can also realize geotechnical tests such as differential settlement of a pile-supported embankment and uneven settlement of a subgrade surface at the same time.

A scattered pile and strong net foundation leveling system for steeled storage tank foundations comprises a plurality of pile foundations and soft cushion platforms and is installed in a roundness area of a soft soil foundation field; the area is divided into a supporting area outside a ring and a reinforced area inside the ring; the pile foundations are thick and short; the pile foundations are divided into supporting piles and reinforced piles; the tops of the pile foundations are provided with large and thick rigid pile covers; the supporting piles and the reinforced piles are respectively and wholly planted into soft foundations of the supporting area outside the ring and the reinforced area inside the ring uniformly; the pile distance is large and accordingly scattered piles are formed; the top surfaces of the pile covers are align to each other; the soft cushion platforms are multiple strong net and scatter stone composite cushion layers; the lower surfaces of the multiple strong net and scatter stone composite cushion layers, the top faces of the pile covers and the foundation soil faces between the multiple strong net and scatter stone composite cushion layers and the top faces of the pile covers are connected in a sliding mode to cover on the area; and storage tank foundation surrounding walls and the steeled storage tanks are constructed on the upper surfaces of the soft cushion platforms. The scattered pile and strong net foundation leveling system for the steeled storage tank foundations has the advantages of being applicable to install in the soft soil foundations, being capable of achieving differential sedimentation control and foundation leveling of the steeled storage tank foundations and being thick and short in pile foundations, few in pile foundation numbers, small in construction difficulty, short in construction period, low in construction cost and good in shock resistance performance.

The invention provides a construction method for preventing an underground pipe gallery from generating differential settlement, and belongs to the technical field of building construction. The methodcomprises the following steps that a foundation is treated, a cushion layer is laid, a template is erected, steel bars are laid, concrete pouring is carried out, a settlement correcting system is installed, and grouting correction is carried out. According to the construction method for preventing the underground pipe gallery from generating differential settlement, when the data collected by a monitoring device reaches a preset critical value, a control device corrects the device to apply corresponding jacking force or tightening force to the port of the underground pipe gallery at the two sides of a connecting part so as to compensate the stress difference between two adjacent pipe sections according to the data collected; grouting is carried out at the weak part of the foundation in adrilling mode when the system has early warning so that the bearing capacity of the weak part of the foundation can be enhanced, and the pipe gallery can be uniformly settled; the construction methodeffectively restrains differential settlement at the connecting part of the pipe gallery, a lot of later maintenance cost is reduced, and the occurrence of vicious events caused by pipe gallery differential settlement is avoided.

The invention discloses a buoy displacement meter type roadbed differential settlement tester which consists of a differential settlement observing horizontal tube and a buoy displacement meter deformation test system, wherein in the differential settlement observing horizontal tube, a top plate frame and a geotextile bottom plate form a sealed cavity; and the buoy displacement meter deformation test system has a structure as follows: the differential settlement observing horizontal tube is half-filled with a liquid (3), and internally provided multiple buoy plates (5) and buoy range control lines (4) for controlling the buoy range and corresponding to the buoy plates (5); each buoy plate (5) is connected with a displacement meter (6); and each displacement meter (6) is electrically connected with a displacement observer (8) through a wire (7). By adopting the buoy displacement meter type roadbed differential settlement tester disclosed by the invention to perform differential settlement observation at the roadbed filling and excavating junction, the half-filling and half-excavating part and other parts, inconvenience in embedding multiple settlement plates is avoided, and the test is easier and more precise than the test by adopting the settlement plates.

The present invention discloses a foundation treatment method for exactly regulating foundation settlement, and a construction device, and belongs to the technical field of civil engineering. According to the method, the number of squeezing expanding apparatuses and the amount of diameter expansion are determined according to settlement prediction of the foundation to be eliminated; with gradual expansions of the squeezing and expanding apparatuses in the soil according to the specified rates, horizontal loads are applied on the surrounding soil, such that the soil is forced to be subjected to drainage consolidation, the porosity is reduced until the pore reduction meet the design target value so as to realize a purpose of exact regulation of the foundation settlement. The construction device is the squeezing and expanding apparatus. The squeezing and expanding apparatus comprises at least an II type squeezing and expanding apparatus unit, which can form an oblique extension type diameter-variable pile pore after expanding. According to the present invention, with diameter-variable squeezing and expanding, according to the preset target, the pores in the foundation are exactly andquantitatively eliminated so as to achieve the purpose of exact regulation of the foundation settlement prediction; for the road widening project, the settlement difference between the old road foundation and the new road foundation can be exactly controlled; the construction device is convenient, the construction method is simple and the cost is low.

The invention relates to a method for processing a foundation through one-time pipe insertion and multi-time vacuum well point precipitation dynamic consolidation, which comprises the following steps: adopting a process combining a heavy-tamping method with suitable energy level and one-time pipe insertion and multi-time vacuum well point precipitation to accelerate the dissipation of excess pore water pressure caused by over-high water level and heavy-tamping constructions; forming a 'hard shell layer' with certain thickness through a surface layer to increase the diffusion effect of subsidiary stress so as to form a double-layer foundation; and reducing the differential settlement under the action of loads through the regulating action of the 'hard shell layer' so that the deformations of the entire field are harmonious and play a combined action to satisfy dual requirements on the foundation bearing capacity and the deformation. By combining the advantages that low-energy-level heavy-tamping greatly improves the surface layer bearing capacity and the vacuum well point precipitation accelerates the dissipation of the excess pore water pressure of the field, the invention provides the method for processing the foundation through the one-time pipe insertion and the multi-time vacuum well point precipitation dynamic consolidation, and the method has the advantages of manufacturing cost saving, quick construction, mature construction experience, simple process and remarkable effect.

The invention discloses an ancient landform recovery method based on a source-sink system. The ancient landform recovery method comprises the steps that: S1, selecting a to-be-recovered region, and determining a geological history period; S2, dividing source-sink units of a geological history period on the basis of the residual landform; S3, based on a structural evolution rule of the to-be-recovered region, determining a differential settlement rule and a deposition reference surface, and performing differential settlement correction; S4, defining the ranges of a denudation region, an over-stripping region and an over-covering region based on the unconformity interface characteristics of the to-be-recovered region and the seismic facies difference of different lithologies, and performingdenudation amount recovery on the denudation region and the over-stripping region based on the principle of conservation of substances of the source-sink system; and S5, superposing images obtained inthe step S3 and the step S4 to complete recovery of the ancient landform framework. According to the ancient landform recovery method, the denudation region material source and the total material amount are recovered more visually and scientifically, so that ancient landform and prototype basins in the deposition period are established, and guidance is provided for research on denudation and deposition region material distribution, landform evolution, reservoir characteristics, reservoir body distribution and the like.

An anti-differential settlement inspection well device comprises a well cover (1) and a well body (2), wherein a support plate (3) is arranged below the well cover (1), a well cover placing hole (31) is formed in the support plate (3), and the area of the support plate (3) opposite to a well body upper opening (21) is at least greater than that formed by the outer edge of the well body upper opening (21); the support plate (3) is located above the well body upper opening (21), and the lower surface of the support plate (3) is separated from the well body upper opening (21); cushion blocks (4) are arranged below the outer edge of the support plate (3) in a way of supporting the outer edge of the support plate (3); and the cushion blocks (4) partially extend out of the outer edge of the support plate (3). Even if under the long-term and repeated action of load of vehicles, the inspection well device can always avoid differential settlement generated between the well cover and/or the well body and circumjacent roads. In addition, the invention further provides a construction method of the anti-differential settlement inspection well device.

The invention relates to a method for obtaining the horizontal deformation amount and the differential settlement amount of seams between rectangular tunnel sections. By making a first displacement meter connected to two rectangular tunnel sections in the way of being perpendicular to the seams all the time, a measuring value of the first displacement meter is the actual distance change of the tworectangular tunnel sections in the direction perpendicular to the seams, namely, the actual horizontal deformation amount of the seams. Thereby, the first displacement meter can accurately measure the horizontal deformation amount of the seams, through the further combination of a second displacement meter which is aslant connected to the two rectangular tunnel sections relative to the seams andcan be adapted to relative motion of the two rectangular tunnel sections, and according to the horizontal deformation amount of the seams and the displacement amount measured by the second displacement meter, the differential settlement amount between the two rectangular tunnel sections is obtained through a geometrical mathematical model. To sum up, through the two displacement meters, the horizontal deformation amount and the differential settlement amount of the seams can be accurately obtained simultaneously, and the overall cost is obviously lowered.

The invention discloses a method for adjusting the bridge floor-road surface differential settlement at a road-bridge joint of an in-service highway, belonging to the technical field of road and bridge building engineering. The method comprises the following steps of: punching on proper parts in a section experiencing road surface settlement at the road-bridge joint at the bridgehead; placing an expansion material into the hole and extruding densely; sealing the orifice with soil or other materials; and extruding the soil body around by the volume expansion of the expansion material to push the soil body above to move upward so as to generate upward displacement of the sunk road surface and achieve the aim of recovering flatness of the sunk road surface. According to the invention, the expansion material has controllable delay expansion property, and the differential settlement at the road-bridge joint of the in-service highway can be accurately recovered. The construction material is economical, the construction method is simple, the construction is finished without influencing vehicle operation, and the method is a processing method which has low cost and can accurately control the foundation settlement amount and increase the road surface height.

The invention discloses a method for calculating the rail elevation adjustment amount of a settlement over-limit section of a high-speed railway bridge. The normed index limit requirements of the lineshape, the differential settlement and the bevel of the settlement over-limit section of the high-speed railway bridge are comprehensively considered, the objective control function of the rail elevation adjustment effect is established, and the rail elevation adjustment amounts that can improve the smoothness of the rail to the maximum are searched and calculated within the limit range of adjustable amounts of the repair measures. The method includes the following steps: S1, obtaining engineering information of the settlement over-limit section; S2, setting requirements of the rail elevationadjustment effect; S3, setting adjustable limit values of the repair measures; S4, establishing the objective function of the rail adjustment effect; and S5, searching and calculating an optimal adjustment amount plan. According to the invention, searching and calculation are conducted within the adjustable range, the smoothness of the line is improved to the maximum while the normed index limitrequirements are met, and the method can be widely used for the calculation of the rail elevation adjustment amount of the settlement over-limit section of the high-speed railway bridge.

The invention discloses a high-frequency static compaction-drainage-grouting composite foundation processing method and special equipment. The main processes are as follows: hyperpressure compaction and active drainage, active grouting and active release of extra additional stress energy. According to the method, intermediate and shallow foundation soil compaction hard layers are formed rapidly, the whole vertical bearing force and horizontal side-sliding capability of the composite foundation soil can be promoted, and the phenomena that 'rubber soil' caused by overlarge external additional stress, the poor effects of post-construction settlement and differential settlement, and the collapse caused by side sliding of a large area of soil can be avoided. According to the method, 100% of combined preloading earthwork is saved, 50% of construction period can be shortened, more than 50% of construction cost is saved, and repeated pollution caused by exploit and transportation of a large amount of earthwork can be avoided. The method adapts to the construction of different soft soil layers and the field construction of complicated regions.

The invention provides a method for separating and culturing mouse cerebellar granule cells. The method comprises (a) killing a mouse through breaking the neck, disinfecting the mouse through alcohol, separating mouse cerebellum, putting the cerebellum in a pre-cooled sterile dual antibody-containing PBS buffer, and fast and carefully stripping a meninx and blood vessels on the cerebellum through a dissecting microscope, (b) digesting the cerebellum through a preheated mixed enzyme solution in an incubator at a temperature of 37 DEG C for 10-15min, (c) acquiring cerebellar granule cells through combination of a differential sedimentation method and a differential attachment method, and (d) during the culture process, adding an appropriate amount of cytarabine at different time points to inhibit growth of non-neuronal cells. The method provided by the invention can acquire mouse cerebellar granule cells with high yield, a high survival rate and high purity.

The invention relates to a bridge connecting grade section foundation protecting method in building engineering technique field. It includes the following steps: confirming construction parameter including settling volume, stirring pipe length, connecting grade section foundation protecting range L_a and stirring pipe interval, and improved board thickness; enlarging deep layer stirring pipe from 1m to the maximum that means from bridge connecting to building side surface; mixing soft clay and concrete to use as road bed material and solidifying to form improved board. This can reduce the setting volume and differential settlement. The method is simple, and can greatly reduce construction cost and period, and avoid maintenance cost caused by differential settlement.

The invention provides a differential settlement cumulant measurement method and device. The method comprises the following steps that (1), a plane is determined by three points, a monitoring reference is determined, and specifically, the plane is determined by the three points through utilization of a basic geometric principle; (2), a dip angle is periodically observed, and change of an intersection angle of a monitoring reference plane and a plumb bob direction is observed through adoption of a gravity acceleration type high precision dip angle sensor and a read, transmission and display system thereof; and (3), an observation reference line is selected, the change of a reference plane dip angle in a reference line direction is continuously measured, and an accumulated differential settlement value is computed based on the geometric principle and features of a sedimentation profile. According to the method and the device, continuous and accumulated measurement can be carried out on differential settlement and a monitoring reference can be set according to the features of a monitored structure and monitoring conditions, so the method and the device are applicable to integrated grasp of response features of the monitored structure to disturbance resulting from excavation of underground constructions such as a foundation pit, a tunnel and mining, from various directions.

The invention discloses a soft foundation treatment to eliminating non-uniform sedimentation, and it is characterized by: firstly dividing built-up area exactly according the data which is obtained by the rapid exploration means on site and the calculated settlement; using the fast dynamic dewatering consolidation process to forming a hard shell with certain thickness and high density on the soil layer in the dealing category. Its beneficial effects are: it eliminates non-uniform sedimentation in different parts of one field basically during the process of soft foundation construction, ensures the non-uniform sedimentation of ground foundation completed rapidly in construction period, prevents the engineering problems such as the ground deformation, buildings cracking caused by difference sedimentation after construction period.

The invention relates to a grouting reinforcement method capable of effectively reducing non-uniform settlement of a building foundation. The grouting reinforcement method comprises the following steps of acquiring location information of an excavation face with a tunnel diameter D in real time; determining a horizontal distance L from the tunnel excavation face to a geometrical center of the building foundation according to the location information; when L is determined to be equal to mD (m being a setting coefficient determined according to a stratum condition), determining a reinforced grouting region and a common grouting region with the tunnel diameter of an excavated tunnel of the building foundation according to a Peck curve formed by the tunnel diameter of the excavated tunnel; carrying out grouting reinforcement on the reinforced grouting region and the common grouting region by utilizing a pressure grouting method; and controlling grouting amount by utilizing grouting pressure, stopping grouting when final grouting pressure of the reinforced grouting region reaches a first set strength threshold value, and stopping grouting when final grouting pressure of the common grouting region reaches a second set strength threshold value. The grouting reinforcement method can effectively make up settlement caused by stratum loss, so that settlement in the middle of a settling tank trends to be consistent with that at the two sides of the settling tank, and differential settlement of the building foundation is reduced; and cost is low.

The invention provides a construction structure and method of a plastic drainage board and CFG pile soft foundation treatment transition section, and belongs to the field of subgrade engineering softfoundation construction. The construction method comprises the steps: after a plastic drainage board and a CFG pile are driven in a soil layer, soil bodies with two or more types of heights are stacked above a transition area in a filled mode in a graded filling mode, after stacking filling is completed, certain prepressing time is kept, after the foundation soil bodies reach the consolidation degree and strength meeting the requirement, overload soil bodies are unloaded, and then a subgrade and a pavement structural layer are constructed to reduce or even eliminate difference sedimentation between two treatment modes so as to ensure the safety of road operation.