69 results about "Geotechnical investigation" patented technology

The invention discloses a water-locking type unconsolidated formation sampling drilling tool. The drilling tool comprises a drill bit, an external cylinder, a coring tube, a piston, a bin base and a plugging switch, wherein the drill bit is connected to the lower end of the external cylinder; the coring tube is arranged in the external cylinder; the piston is arranged in the coring tube; the upper part of the coring tube is connected with the bin base which is connected with the coring tube in a sealed mode; a through hole which is connected with the coring tube is formed in the bottom surface of the bin base; the plugging switch is arranged in the through hole; and a water hole is formed in the wall of the bin base. The water-locking type unconsolidated formation sampling drilling tool has a simple structure, can efficiently sample unconsolidated and broken formations such as sandy soil layers, soil layers, gravel-containing layers and the like in a high-quality way, has a high sampling rate, particularly can preserve the sequence state of the formations well, and is suitable for environmental sampling, geotechnical investigation and surveying sampling and the like of the unconsolidated and broken formations and the like, and the obtained samples are undisturbed and are high in fidelity.

The invention discloses a drilling device for geotechnical investigation, and relates to the technical field of geotechnical construction. The drilling device comprises a base, an adjusting mechanismand a geotechnical exploration machine; the adjusting mechanism comprises a moving assembly, a rotating assembly, a lifting assembly, an extending assembly and an angle adjusting assembly; and the moving assembly is fixedly arranged on the base, the rotating assembly is arranged on the moving assembly, the lifting assembly is fixedly arranged on the rotating assembly, the extending assembly is arranged on the lifting assembly and connected with the lifting assembly in a threaded mode, the angle adjusting assembly is fixedly arranged on the extending assembly, and the geotechnical exploration machine is fixedly arranged on the adjusting assembly. According to the drilling device, by adjusting the mutual coordination of the assemblies in the adjusting mechanism, the exploration range and angle of the geotechnical exploration machine can be bigger and wider, and the problem that the exploration range of existing geotechnical exploration equipment is limited, after used, the equipment needs to be moved again to explore other geotechnical areas which is very troublesome is solved.

The invention provides a low-confining-pressure static and dynamic triaxial testing system based on a MTS power source, and belongs to the study field of geotechnical engineering. The low-confining-pressure static and dynamic triaxial testing system comprises a MTS tester and a triaxial testing device; the triaxial testing device comprises a pressure chamber, a measuring system and a confining pressure control system; the pressure chamber comprises a base, a side wall and a top plate; the measuring system comprises an electronic displacement meter, a radial deformation sensor and a force sensor; the side wall is in sealing connection with the base and the top plate; the force sensor is installed on the base, and a test sample is placed on the force sensor; the radial deformation sensor is plugged in the test sample; a test sample cap is arranged on the test sample, and the test sample cap is connected with a dowel steel; the dowel steel is connected with an actuator of the MTS tester by crossing through the top plate of the pressure chamber; the electronic displacement meter is installed on the dowel steel; the pressure chamber is connected with a confining pressure control system; confining pressure control system is used for providing stable confining pressure; the confining pressure medium is compression gas. The low-confining-pressure static and dynamic triaxial testing system solves the technical problem of unstable low confining pressure environment, big confining pressure difference and big measurement bias of the acting force at present.

The invention relates to an instrument and a device for geotechnical investigation. Disclosed is a full hydraulic self-drilling side pressure device which is characterized by comprising a full hydraulic self-drilling side pressure gauge, a mud power pump (1), a data measuring and controlling instrument (2), a shielded cable (3), a high-pressure hose (4), a drill rod (5) and an elevator (6); the full hydraulic self-drilling side pressure gauge comprises a power device, a side pressure device and a self-drilling device; the side pressure device comprises a hydraulic cylinder (12), a connecting sleeve (14), a thrust sliding pad (15), sector-shaped horizontal press blocks(16) and a side pressure frame (17); each side pressure hole of the side pressure frame (17)is provided with a sector-shaped horizontal press block(16); the inner side of the sector-shaped horizontal press block (16) is bevel shaped and is provided with a dovetail groove (26) along the axial direction; the sliding head of the thrust sliding pad (15) locates in the dovetail groove which is corresponding to the sector-shaped horizontal press block (16); the lower part of the piston rod (13) of the hydraulic cylinder (12) runs through the connecting sleeve (14) and is in threaded connection with the thrust sliding pad (15). The instrument and the device of the invention are characterized by simple structure and operation.

The invention discloses an undistributed soil sampling device and a sampling method, belonging to the technical field of geotechnical investigation and providing an undistributed soil sampling device and an undistributed soil sampling method which have little disturbance to undistributed soil, do not easily cause loosening of sampled soil, and are convenient for sampling, packaging and subsequent transportation and transfer of the undistributed soil. The undistributed soil sampling device comprises a sampling tube body having two open ends, and a force applicator, wherein the force applicator comprises a lantern ring and a force transfer handle; a clamping ring bulge is arranged on the outer peripheral wall of the top of the sampling tube body and is lower than the top end surface of the sampling tube body; the lantern ring is detachably sheathed on the sampling tube body above the clamping ring bulge. The device disclosed by the invention is simple in structure; the sampling tube body can be completely pressed under the surface of the soil, such that the undistributed soil can be completely full of the whole sampling tube body to effectively avoid the situation of soil loosening; the device is also convenient for manual application of force to reduce the disturbance to the undistributed soil in a force application process and improve the sampling success ratio of the undistributed soil.

The invention relates to a pick having a bimetal structure and a preparation method thereof, in particular to a pick and a preparation method applicable to coal mining machines and tunneling machines capable of cutting coal seams and rock strata, belonging to the technical field of the research on mining machinery metallic materials and geotechnical engineering. The pick is characterized in that the pick body consists of two metals, wherein the most wear-prone top end of a pick head of the pick is made of tailor-made alloy steel; the wear-resistant lower ends of the pick handle and pick head are made of medium carbon alloy steel; a plurality of ring-shaped grooves are formed below the top end of the pick head; an interlayer is arranged between every two adjacent ring-shaped grooves; the ring-shaped grooves are subjected to full-surfacing process by using the tailor-made alloy steel welding rods; and since the interlayer is thin, the integral wear-resistant tailor-made alloy steel can be formed at the top end of the pick head. The pick of the invention has the advantages of simple structure, novel design, high practicability, convenient fabrication, high hardness and wear resistance and good impact-resisting and corrosion-resisting performance; and according to industrial tests, compared with the homemade pick, the service life of the pick is prolonged by 20 to 30 times, thus saving a great deal of alloy steel materials for our country and reducing the mining cost.

The invention provides a GIS-based survey management and data intelligent analysis system and method. The system comprises a data management end which imports the latest geotechnical engineering survey data into a database; the server communicates with the database, and the server enables the massive geological information to form a two-dimensional graph; wherein the data management end constructsa database, analyzes a data file format of geotechnical investigation data, realizes inspection and data import of the geotechnical investigation data, and imports the geotechnical investigation datainto the database in batches; and the Web desktop end is deployed on the server in a B / S mode, and inquires, retrieves and counts the geotechnical engineering investigation data stored in the serverin various forms through a browser. The latest engineering investigation data is imported into the system database regularly, so that normal updating of the data in the system is guaranteed, and all personnel can see the latest achievements in time conveniently.

The invention discloses a method for evaluating the stability of goaf tunnel surrounding rocks, and belongs to the technical field of geotechnical investigation methods. The method provided by the invention employs the geophysical prospecting data for evaluating the stability of the goaf-crossing tunnel surrounding rocks. The method comprises the following steps: 1, determining the relation between apparent density and the wave velocity of surrounding rocks; 2, measuring the value of apparent density; 3, determining the wave velocity value of the surrounding rocks; 4, carrying out the determining of the stability of the surrounding rocks. The method provided by the invention employs the geophysical prospecting means of density log and wave velocity testing reasonably and effectively, achieves the reliable evaluation of the stability of the surrounding rocks through the parameter of apparent density and the wave velocity of surrounding rocks, and finally guarantees the safe and high-efficiency tunnel construction process.

A geotechnical engineering investigation method is characterized by comprising the following steps: (1) dividing a geotechnical investigation region into a plurality of working segments in the engineering strike; (2) achieving horizontal directional drilling in the tested region of each working segment, and laying a pipeline allowing an engineering physical testing device and a receiving device to pass in the engineering strike in the aperture passage; (3) repeating the step (2) and ensuring that at least two pipelines exist in the tested region; (4) placing the engineering physical testing device in one of the pipelines and the receiving device in the other pipeline, and enabling the engineering physical testing device and the receiving device to move from the same end of the pipelines to the other end so as to detect and acquire geotechnical investigation data of each region. The geotechnical engineering investigation method has simple steps and high investigation accuracy, and particularly has broad application prospect in linear engineering constructions, such as pipelines, subways and tunnels.

The invention relates to the technical field of geotechnical investigation construction, in particular to a cast-in-situ bored pile hole forming method. The cast-in-situ bored pile hole forming methodcomprises the steps of carrying out preparation before construction, carrying out pile casing burying, carrying out drilling, carrying out hole cleaning, carrying out drainage hole drilling, carryingout chambering and the like, and in the chambering step, a pre-drilled pile hole during drilling is gradually squeezed to the designed pile hole diameter through three times of squeezing and chambering. The method has the effects that a small amount of soil is discharged in the hole forming process so that pollution to the construction environment can be reduced, and the construction pollution discharge cost is reduced.

The invention relates to the technical field of geotechnical investigation and especially relates to an expansive soil calculating model and an application method on the basis of engineering boundary condition. The invention is characterized in that the calculating model comprises a to-be-built building, an expansive soil layer and a lower lying soil layer the expansive soil layer is positioned above the lower lying soil layer; the to-be-built building is set above the expansive soil layer; the calculating model uses a section as a research object and is used for evaluating the impact of the expansive soil layer on the to-be-built building; the building condition of the calculating model comprises at least the dimension of the to-be-built building, the load of the to-be-built building, the distribution width and the distribution depth of the expansive soil layer, and the distribution width and the distribution depth of the lower lying layer. The invention has following advantages: the calculating model has strong versatility and can be adapted to different conditions and has a wide application range; the calculating results are accurate and the calculating process is simple; the calculating model provides guidance for the subsequent design and construction of to-be-built building and has analysis meaning.

The invention belongs to the technical field of geotechnical engineering, and particularly discloses a drilling device for geotechnical engineering investigation. In order to solve the problems that fixation is not convenient, movement is not reliable, the drilling depth cannot be measured, and a drilling bit is monotonous in design function and cannot rapidly extract a liquid substance in drilling out from a drilling hole, the following scheme is proposed; the drilling device comprises a fixing base plate, four fixing vertical rods are welded to the outer walls of the two sides of the bottomof the fixing base plate, fixing supports are welded to the outer walls of the bottom ends of the four fixing vertical rods, and three mounting holes are formed in the outer wall of the bottom of eachfixing support at equal intervals. According to the drilling device, a drilling rod can be reliably fixed, and the stability of the drilling rod in high-speed rotation is guranateed; the drilling depth of the drilling rod can be measured, which makes it convenient for workers to control the investigation work; the liquid substance in drilling can be rapidly extracted out from the drilling hole.

The invention aims to solve the problems that the storage of samples is inconvenient in the cataloging and storage process of core samples, and a traditional storage device does not benefit transportand takeout of the core samples. When the core samples are cataloged, male plugs and female slots on connecting plates of outer barrel parts can be freely connected with each other in an inserting manner so that multiple shapes are formed, so that the device is suitable for storage space of the samples, or the samples are easy to take, observe, transport and like; the core samples in inner barrelparts can be taken out through break lock of locking parts at any time, and the takeout and put-in of the core samples are mutually independent; after the outer barrel parts form connected and lockedstructures, the core samples are mutually isolated; no collision occurs in the transport and handling process of the core samples; and the problems that the core samples are liable to fall off and damage by collision in a traditional storage device are solved.

The invention, which relates to the technical field of geotechnical engineering investigation, discloses a geotechnical investigation method based on a high-density electric method and a treatment system thereof. The geotechnical investigation method comprises: selecting a measuring area and arranging a measuring net; placing all electrodes on all measuring points of an observation section; collecting data rapidly by using a program-controlled electrode conversion device and a microcomputer engineering electrical measuring instrument; and sending a measuring result into the microcomputer. Therefore, the rapid data collection and microcomputer processing are realized and thus the e traditional working mode of resistivity exploration is changed, so that the work efficiency is improved and the labor intensity is reduced. Since the high measuring point density is set for the high-density electrical method, the vertical and horizontal two-dimensional exploration process can be completed atone time, so that the observation accuracy is high and the data acquisition is reliable. The obtained geological information is rich, and the basis is reliable.

The invention discloses a sampling device for geotechnical investigation, and relates to the technical field of geotechnical investigation. The sampling device comprises a supportingpart, a connectingpart and a sampling part which are arranged in sequence from top to bottom, wherein thesupportingpart comprises an annular supporting seat and a plurality of supporting rods, a top disc is fixedly arranged at the top end of the annular supporting base, andthe top disc is internally and movably provide with a counterweight in a penetrating mode; the connecting part includes a plurality of section-shaped tubes connected end to end, and the section-shaped tubes are internally and movably provide with thrust bars and control assemblies in a penetrating mode; and the sampling part includes an outer cylinder, and an inner cover is disposed in the outer cylinder in a sliding moving mode; and an inner liner cylinderis disposed at the end,away from thesection-shaped tubes,of the inner cover. Whenthe sampling device is in use, an operator knocks on the counterweight, the counterweighttransmits the impact force to the inner cover through the thrust bars, and the inner cover pushes the inner liner cylinderaway from the outer cylinder to extend into a soil layer, so that the acquisition of a soil sample isrealized. Through the multi-stage combination of the section-shaped tubes, the actual sampling depth of the sampling device can be effectively adjusted according to the depth of surveying holes, so that soil samples of different depthscan be rapidly obtained, and the sampling device is convenient to carry and convenient to assemble due to the detachable design.

The invention discloses anti-pollution geotechnical investigation sampling equipment for building design and a geotechnical investigation method, and relates to the technical field of geotechnical investigation sampling devices. The anti-pollution geotechnical investigation sampling equipment comprises two supporting frames, a pair of connecting plates are installed on the side walls of one sides of the two supporting frames, sliding grooves are formed in the tops of the two supporting frames, and a sliding plate is arranged between the two supporting frames; the two ends of the sliding plate are located in the two sliding grooves, and an L-shaped plate is installed at the bottom of the sliding plate. The equipment is reasonable in structure, a water-soil mixture is sucked into the annular groove through the multiple drainage holes and discharged into the water tank through the water pump, the situation that the water-soil mixture enters the outer pipe shell from the bottom of the drill bit, and consequently rock and soil in the outer pipe shell are polluted is avoided, and the first pressing spring always presses the pressing pipe, so that the pressing pipe is always attached to the surface of the rock and soil; other impurity rock soil on the outer side of the drill bit is further prevented from entering the outer pipe shell from the drill bit, it is ensured that the rock soil is not polluted during sampling, and the rock soil sample analysis accuracy is improved.

According to a geological and geotechnical investigation strength test sampling device provided by the invention, a soil sample can be completely taken out under the condition that the soil sample is not crushed, and meanwhile, the structure of the taken-out soil is not changed, and additional internal stress does not exist, and therefore, the taken sample can accurately reflect the actual condition in the current soil layer; and according to the technical scheme, the sampling device comprises a drilling machine and is characterized by further comprising a sampler installed on the drilling machine, the sampler comprises a sampling barrel, the sampling barrel is divided into an upper cavity and a lower cavity through a partition plate, a cutting layer is coaxially and fixedly connected to the inner side wall of the lower cavity, cutting edges are arranged at the lower ends of the cutting layer and the spiral channel, a guide rod which is coaxially arranged is fixedly connected into the upper cavity, a pressing rod is vertically connected into the guide rod in a sliding mode, the lower end of the pressing rod downwards extends into the lower cavity, a vertically-arranged threaded hole is formed in the upper end of the pressing rod, and a pressing disc is arranged at the lower end of the pressing rod.

The invention relates to the technical field of geotechnical investigation enclosure, and discloses an enclosure device suitable for geotechnical investigation. The enclosure device suitable for geotechnical investigation is characterized in that the enclosure device suitable for geotechnical investigation comprises a base and a baffle, an anchoring structure is arranged at the bottom of the base,and the baffle is movably installed at the top of the base; a fan is arranged in the baffle, and the baffle is provided with an inner plate facing a construction area and an outer plate facing the outside; and when the fan rotates forward, the wind is sucked toward the inner plate, and the wind is exhausted through the outer plate. Through the anchoring structure, a construction site of the baseis fixed, and baffle is movably installed at the top of the base, the installation and transfer of the enclosure device are facilitated; in the geotechnical investigation, due to the large dust of theworking environment of the geotechnical investigation, the motor is started to realize the fan work, the fan rotates forward, the wind is sucked toward the inner plate, the wind is exhausted throughthe outer plate, the air circulation of the working environment is realized, the air circulation effect is greatly improved, the construction environment of the construction personnel is optimized, and enclosure device suitable for geotechnical investigation is conducive to the construction health and safety, and the construction effect is further improved.

The invention relates to the related technical field of marine new energy engineering and marine geotechnical investigation in-situ test, in particular to a saturation device for a spherical static sounding probe and a saturation method. An upper cavity and a lower cavity can be separated up and down and are matched in a staggered mode through a first step part and a second step part, sealing between the upper cavity and the lower cavity can be effectively formed, a hard breathable plate with a fixing hole can be placed on the first step part, the circumference of the hard breathable plate isfixed through the side wall of the upper cavity and the first step part of the lower cavity, and the bottom of the spherical static sounding probe is effectively fixed through the bottom plate with the concave surface in the lower cavity; and the bottom of the spherical static sounding probe is fixed in the lower cavity through the hard breathable plate and the bottom plate with the concave surface in the lower cavity, and the problem that the spherical static sounding probe shakes left and right or slides due to shaking of a working platform under the offshore stormy wave condition is effectively solved.

The invention discloses a saturated silty-fine sand layer induced grouting experimental model and an experimental method, and belongs to the field of foundation and geotechnical engineering research.The experimental model comprises a model system, a grouting control system, a negative pressure induction system and an intelligent monitoring system. The principle of induced grouting is provided; bychanging conditions such as pressure, a grouting mode, grouting time, a sand layer structure, slurry components and the like, different porosities, water pressures, flow rates, time, consistencies and slurry diffusion rules under different flowing water flow conditions are monitored, and related information such as slurry diffusion, flow rate change, osmotic pressure distribution, energy loss andthe like is researched and monitored in the grouting process. Directional grouting and directional foundation reinforcement can be conducted on a saturated sandy soil foundation in a negative pressure induction mode, and the range and effect of foundation reinforcement can be achieved according to the engineering requirement and the induced grouting principle.

The invention relates to the field of geotechnical engineering study and aims to provide a one-dimensional vertical dredger fill particle concentration testing device and a testing method. The one-dimensional vertical dredger fill particle concentration testing device comprises a settling column, a supporting system, a measuring system and a monitoring system, wherein in the supporting system, a measuring cantilever is mounted on a vertical supporting steel plate; the measuring system comprises an X ray emitting device and an X ray receiving device which are mounted at two ends of the measuring cantilever respectively, and the settling column is vertically arranged between the X ray emitting device and the X ray receiving device; the X ray emitting device and a driving motor are connected with a computer through signal wires respectively; the X ray receiving device is connected with a data acquisition device and the computer sequentially through signal wires. By means of the one-dimensional vertical dredger fill particle concentration testing device, settling layering conditions of dredger fill samples in all time periods can be observed directly, and precise data can be obtained by the data acquisition system for further study. The device is simple in structure and easy to use, the settling column is easy to dismount and clean after an experiment, data can be recorded automatically, labor demanded by the experiment is reduced, and artificial reading errors are reduced.

The invention belongs to the field of geotechnical investigation technologies and discloses a determination device and a determination method for geotechnical engineering investigation. According to the method, geotechnical detection equipment is utilized to detect geotechnical hardness data; the geotechnical detection equipment is utilized to detect geotechnical seepage coefficient data; geotechnical field image data is collected by use of a camera which performs correction based on independence parameters; test equipment is utilized to test geotechnical properties under a geotechnical in-situ state and a stress condition; an automatic generation program is utilized to automatically generate a geotechnical investigation description report; and a memory stores detected geotechnical hardness, seepage coefficients, the field image data, a test result and the investigation description report. Through the determination device and the determination method, seepage coefficient relevant skewness of a geotechnical material can be effectively determined, all the steps are clear, the physical significance is explicit, operation is convenient, and practicability is high; and meanwhile, through an investigation report generation module, geological investigation report geotechnical layer description can be automatically generated through the program, and therefore the problems of manual errors and low manual efficiency are relieved.

The invention belongs to the technical field of geotechnical investigation and detection and discloses a soil bonding curing agent and a soil detection method. The soil bonding curing agent comprises the following components in parts by weight, 40-70 parts of fly ash, 15-40 parts of asphalt and 10-30 parts of silicone oil. The detection method comprises the following steps of acquiring data of test indexes of an actual soil sample and a bonded cured soil sample, establishing a working curve, bonding and fixing a to-be-detected soil sample and a soil bonding curing agent, and sending to a laboratory for detection to obtain detection parameter indexes; and finally, calculating according to a fitting formula of the working curve to obtain actual parameter indexes of the soil sample to be detected. According to the detection method disclosed by the invention, special protection measures do not need to be taken on the taken cohesionless sedimentary soil or high-saturation soft soil sample, and the subsequent soil sample to be detected can be conveniently subjected to indoor test detection through pre-data acquisition and working curve establishment; and detection convenience and accuracy are greatly enhanced.

The invention discloses a shock-absorbing platform for geotechnical investigation and belongs to the technical field of geotechnical engineering investigation. The shock-absorbing platform comprises afirst support plate and a second support plate, wherein support sleeves are arranged below the second support plate; mounting bases corresponding to the support sleeves are arranged at two ends of the lower surface of the second support plate; limiting bolts corresponding to the support sleeves are arranged at the bottom ends of the mounting bases; the first support plate is arranged above the second support plate; second shock-absorbing mechanisms corresponding to the first support plate are arranged at two ends of the upper surface of the second support plate; each second shock-absorbing mechanism comprises a first limiting base; and first buffering pieces corresponding to the first support plate are arranged at the top ends of the first limiting bases. The shock-absorbing platform is simple in structure and convenient to use; and during use, multiple shock-absorbing is provided through the mutual cooperation between a first shock-absorbing mechanism and the second shock-absorbing mechanisms, so that the shock-absorbing effect of the shock-absorbing platform is better to improve the user experience of the shock-absorbing platform.

The invention discloses a geological and geotechnical survey measuring device, relates to the technical field of geological survey, and mainly aims to solve the problem that an existing geological and geotechnical survey measuring device cannot adapt to various terrain environments, the geological and geotechnical survey measuring device comprises a sampling assembly, a moving mechanism and a bearing shell, the moving mechanism comprises a circular framework, an adjusting assembly and a shifting piece assembly, a first magnet and a second magnet are arranged on the circular framework, a third magnet in the adjusting assembly is connected with the first magnet and the second magnet in an attraction mode, and a limiting rib matched with the limiting groove is installed at one end of a transmission column on the shifting piece assembly. The connection relation between a first gear on the adjusting assembly and a second gear on the supporting assembly and between a rotating column on the adjusting assembly and a fourth gear on the shifting piece assembly is adjusted by adjusting the position of the adjusting assembly, then movement of the supporting assembly and the shifting piece assembly is controlled, and the form change of the moving mechanism can be rapidly adjusted according to the terrain; and the robot can walk in different terrain environments, so that the exploration task can be smoothly completed.

The invention discloses a multi-sensing wireless information measurement and control system for deep geotechnical investigation. The multi-sensing wireless information measurement and control system comprises an underground system and a ground system, wherein the underground system is wirelessly connected with the ground system. The multi-sensing wireless information measurement and control system aims to the field of geotechnical engineering investigation, on one hand, on the premise that the cableless requirement of static deep spinning touch is met, multiple soil mechanic parameters such as the cone tip resistance, the probe side wall resistance, the inclination and the temperature when a touch probe is fed, and survey environment information can be acquired and stored in real time due to design of the underground system; on the other hand, due to design of a low power consumption wireless transmission module, the ground system and corresponding interface circuits, wireless transmission synchronous correction and intelligent processing, backup and uploading of deep geotechnical investigation information and survey depth can be achieved, so that the speed of deep geotechnical investigation is accelerated, the precision of deep geotechnical investigation is improved, and the effects of lowering the engineering cost and ensuring the construction project safety can be achieved.

The invention relates to the technical field of geotechnical investigation, and discloses a geotechnical investigation test sample density testing system. The testing system comprises a sample guidingsystem, and further comprises a weighing system, a sample volume detecting system and a computer data processing system. The testing system is suitable for geotechnical investigation test sample density testing; the weighing system and the sample volume detecting system are used for measuring weight and volume information of a sample; measuring results are sent to the computer data processing system for calculation; and finally the density of the sample is obtained. The whole device moves through the sample guiding system in a running process, and the sample does not need to be manually moved, so that the use is more convenient; the testing system has the functions of continuous measurement, automatic identification, automatic recording, automatic calculation and automatic storage; and meanwhile, the computer data processing system protects the normal operation of the whole device through a program set in the computer data processing system.

The invention provides a groundwater observation well pipe and an observation method for geotechnical investigation and surveying. The groundwater observation well pipe comprises an observation well hole, a telescopic well pipe, and telescopic push rods placed in the telescopic well pipe, wherein the telescopic well pipe comprises an outer layer solid wall pipe body and one or two or more telescopic perforated pipes in mutual sleeving connection; the end of the most outer layer telescopic rod of each telescopic push rod is connected with the most inner layer telescopic perforated pipe; the length of the outer layer solid wall pipe is greater than or equal to the distance between the openings of the observation well hole and the top surface of a water containing layer to be tested; and after the telescopic well pipe is mounted in the observation well hole, a rotary switching sealing ring is arranged outside the outer layer solid wall pipe body in a sleeving manner to realize sealing ofthe outer wall of the well pipe above the water containing layer to be tested and the hole wall of the observation well hole, and after the groundwater water level in the holes is stable, observationof the water level can be performed. Clay balls do not need to be backfilled, observation accuracy can be guaranteed, primary pipe sinking in place can be realized, the problem that the well pipe is mounted to cause subsidence of the hole wall can be solved, and the groundwater level can be observed in a layering manner.

The invention discloses a static sounding device and a static sounding method, and relates to the technical field of geotechnical investigation. The static sounding device comprises a sounding machine body and a supporting frame, wherein the sounding machine body is arranged at the top end of the supporting frame, the sounding machine body comprises a sounding feeler lever, a sounding probe is installed at the bottom end of the sounding feeler lever, at least three inserting rods are arranged at the bottom end of the supporting frame at intervals, supporting discs sleeve the inserting rods in a threaded mode, connecting sleeves slidably sleeve the outsides of the inserting rods, inserting plates are hinged to the outer side walls of the connecting sleeves, bearing plates are hinged to the bottom end of the supporting frame, and the inserting plates are in sliding fit with the bearing plates. According to the static sounding device, the inserting rods are inserted into foundation soil, the position of a supporting disc on the inserting rods can be adjusted by rotating the supporting disc, and the bottom end of the supporting disc abuts against the surface of the foundation soil to support the supporting frame, so that the supporting frame is kept in the horizontal state, the sounding feeler lever is vertically inserted into the foundation soil, and the accuracy of static surveying of the foundation soil is improved.