68 results about "Cone penetration test" patented technology

The invention discloses a deep static cone penetration test method for geotechnical engineering. On the basis of the conventional wireless static cone penetration test method, a casing with a protection function is provided for a static cone penetration feeler lever by using the property that a rotary cone penetration vehicle rotatably penetrates a power head, and is rotatably penetrated, the bottom of the casting is provided with a cutting tooth (a rib drill) which contributes to rotatable penetration, and water or slurry with lubrication action, which is provided by the rotary cone penetration vehicle, is fully used by the rotatable penetration of the casing, so that the depth of the rotatably penetrated casting is obviously greater than that of the casting which is penetrated under static pressure and the feeler level can be prevented from being stressed, bent and then broken; therefore, the static penetration depth of a wireless static cone penetration rod can be improved. Tests prove that the method can realize the deep static cone penetration, and the largest test depth in the Tianjin area is 70 meters. The method has the advantages of obviously improving the static cone penetration depth, along with simplicity in operation.

The invention discloses a multifunctional digital rock-soil static cone penetration test system. The multifunctional digital rock-soil static cone penetration test system comprises a rock-soil static cone penetration combined sensor intelligent transmitter, a CAN (controller area network) bus-based data transmission arbitration unit, a cone penetration depth variation indicator and a rock-soil static cone penetration data processing terminal; the rock-soil static cone penetration combined sensor intelligent transmitter comprises a rock-soil static cone penetration conical tip resistance data measuring module, a side friction resistance data measuring module, a hole pressure data measuring module, an electric resistivity data measuring module, a shear wave velocity data measuring module and a slant angle measuring module; the CAN bus-based data transmission arbitration unit comprises a CAN receiver-transmitter, a communication interface and a CAN scheduling protocol; the cone penetration depth variation indicator comprises a gear rotating device which is in proportion to the depth variation, a gear rotation velocity measuring module and a rotation velocity and depth variation conversion module. The multifunctional digital rock-soil static cone penetration test system has the advantages of multiple functions, combined type, intelligentization, digitalization, convenience in operation and high efficiency.

The invention relates to an indoor inclined static cone penetration model test device which is applied to a civil engineering indoor static cone penetration model test. The indoor inclined static cone penetration model test device comprises a penetration system, a sliding device and a test model box. The penetration system comprises a mechanical part and a power part. The mechanical part comprises an angle adjusting support, a static cone penetration rod, a static cone penetration frame, a chain and a gear transmission device, wherein the angle adjusting support, the static cone penetration rod, the static cone penetration frame, the chain and the gear transmission device are connected in sequence. The power part comprises a three-phase asynchronous motor and a variable-frequency governor, wherein the three-phase asynchronous motor and the variable-frequency governor are connected with each other. The sliding device comprises U-steels, square steels and ball bearings, wherein each ball bearing is connected on one U-steel and one square steel. A bottom plate of the test model box is a steel plate, organic glass surrounds the bottom plate, and the bottom plate is connected with the periphery in a sealing mode. In addition, a peripheral skeleton of the test model box is made of angle steel in a welded mode so that the stability of the test model box can be guaranteed. The indoor inclined static cone penetration model test device can achieve the purposes that a penetration test can be conducted at any position of the horizontal plane of the test model box, the penetration rate can be controlled within a certain speed range, and constant speed can be kept. Besides, compared with conventional equipment which can only conduct a vertical static cone penetration test, the indoor inclined static cone penetration model test device can achieve an inclined static cone penetration test within a range of a certain angle of inclination.

The invention discloses a cone penetration test probe suitable for use in deep sea, comprising a conical head and a pore pressure detection device. A pressure cavity is arranged in the probe; the conical head is provided with a water hole. The pore pressure detection device divides the pressure cavity into a front pressure cavity and a rear pressure cavity. The front pressure cavity is communicated with the water hole via a first water passage. The rear pressure cavity is communicated with the outside via a second water passage. The pore pressure detection device includes a first diaphragm, asecond diaphragm, a differential pressure measuring element and an absolute pressure measuring element. The cone penetration test probe herein has the advantages that the differential pressure sensorand the absolute pressure sensor complement each other; namely the differential pressure measuring element having small range but high resolution helps measure a difference between pore pressure and static pressure, so that measurement precision is improved; the absolute pressure measuring element having wide range but small resolution is used to measure static pressure of sea water, thereby facilitating in-situ calibration and giving a consideration to both measurement range and measurement precision.

The invention discloses a method for preparing a big-size model test soil body by layered compaction, comprising the following steps: deciding a filing scheme, processing before soil body filling, borrowing soil based on blocking, putting soil, smoothing in whole, compacting in whole, detecting compaction quality, burying test apparatus and devices, laying an identification layer, testing soil body texture by cone penetration test (CPT) or other in-situ testers and saturating model soil if necessary. In the invention, water content reduction by vacuum pumping, proper air drying in the sun and other methods and combination thereof are adopted to reduce water content of floury soil and silty soil and save labor and cost for drying and other methods. The filling quality and uniformity of the model soil can be accurately controlled by adopting the simple and reasonable filling steps, which is suitable for model tests with high requirements for model soil. The identification layer is laid in the filling layer if necessary, so that soil body deformation can be observed directly by post-test excavation or transparent observation windows on side walls.

The invention relates to a static cone penetration facility and method for rock and soil geological surveying. The static cone penetration facility and method for rock and soil geological surveying are used for solving the problem that when a protection pipe is utilized to protect a penetration rod to conduct a static cone penetration test at present, much inconvenience exists. According to the static cone penetration facility for rock and soil geological surveying, a lifting plate is arranged above a supporting base, a rotary table is arranged on the lifting plate, and circular holes are formed in the centers of the lifting plate and the rotary table. Plug pins are arranged on the upper surface of the rotary table in the circumferential direction of the circular hole. Grooves which are matched with the plug pins are formed in the circumferential directions of a penetration rod and a protection pipe, and teeth are arranged at the lower end of the protection pipe. The static cone penetration method for rock and soil geological surveying comprises the steps that an inner pipe and the protection pipe are assembled together and fixed to the lifting plate; a motor is started, the end ofthe protection pipe downwards drills a hole, the motor is closed after the protection pipe arrives at the deepest point, the position of the protection pipe is kept, and the inner pipe is taken out;the penetration rod section located above the ground is taken down; and the penetration rod stretches into the protection pipe, a probe arrives at the bottom of the protection pipe and then is fixed to the lifting plate through the plug pins, and the static cone penetration test is conducted after the probe and a signal receiving device are well set.

The invention discloses a cone penetration test reaction device comprising variable-diameter spiral ground anchors and a force exerting disc. The cone penetration test reaction device comprises the ground anchors (2) and the force exerting disc (9) and is characterized in that the ground anchors (2) are mounted between rack support legs (4), a drilling head (1) is arranged at the bottom of each ground anchor (2), a variable-diameter spiral blade (3) is connected to the upper part of each drilling head (1), a threaded section (7) is arranged at the top of each ground anchor (2), the top end of each threaded section (7) is connected with a clamping bolt (8), a ground anchor weight (5) is mounted above the variable-diameter spiral blade (3) of each ground anchor (2), two ends of each ground anchor weight (5) are hung on the rack support legs (4), and a ground anchor nut (6) is mounted at the threaded section (7) of each ground anchor (2) and is in press fit above the corresponding ground anchor weight (5); the force exerting disc (9) can cooperate with the clamping bolts (8) at the top ends of the ground anchors (2) through a clamping groove (10) formed in the middle. The cone penetration test reaction device is simple in structure, portable and practical.

The invention discloses an offshore foundation reconnaissance and detection integrated platform, and relates to the field of ocean engineering foundation reconnaissance. A cylindrical base stretches out of the sea surface through a transition section; the upper end of the cylindrical base is connected with a water platform; in-situ cross plate testing equipment, static cone penetration test equipment, full-flow penetration test equipment and drilling, sampling and reconnaissance operation equipment are mounted at the upper part of the water platform; a cylindrical partition is arranged inside the cylindrical base to form a reserved void compartment without a top plate; the top of the reserved void compartment without the top plate opens to the water platform; the number of negative pressure jet pumps and the number of negative pressure detection test modules are the same as the number of branch bins of the cylindrical base; four negative pressure jet pumps and four negative pressure detection test modules are arranged on the periphery of the top of the cylindrical base; inner air bags are arranged in the branch bins of the cylindrical base, and are used for adjusting and centralizing in the sinking process. The integrated offshore foundation reconnaissance and detection platform has the benefits that the platform and an offshore wind flashlight type basic mounting ship are coordinated to be used, no extra tug boat or other mounting equipment is needed, and the operation time and cost are greatly reduced.

The invention discloses a method for measuring the water level and the water head height of a confined aquifer by the pore pressure static cone penetration test. The method comprises steps of 1) carrying out the pore pressure static cone penetration test on the soil layer of the measured area; 2) according to the soil layer divided by the pore pressure static cone penetration test, determining the aquiclude and the confined aquifer, and determining the top buried depth H1 of the confined aquifer; 3) collecting the pore pressure dissipation test stabilization pore water pressure value u0 in the confined aquifer; and 4) calculating the water level h and the water head height hw of the confined aquifer, wherein the calculation formulas are hw=(u0-[gamma]wD) / [gamma]w=u0 / [gamma]w - D (1) and h=H1 - hw (2), hw indicates the pressure head height of the top surface of the confined aquifer; [gamma]w represents the water weight, taking 10kN / m3; H is the test depth; H1 is the top surface buried depth of the confined aquifer; D is the distance from the hole pressure filter of the pore pressure static cone penetration probe to the top surface of the confined aquifer D = H-h; u0 indicates the pore pressure dissipation test stabilization pore water pressure value at the confined aquifer test depth; h represents the buried depth of the water level of the confined aquifer.

The invention discloses a cone penetration device. The cone penetration device comprises a cone penetration machine which is provided with a cross beam. The cone penetration device also comprises a protection pipe installing device. The protection pipe installing device contains a protection pipe component, a protection pipe cap, a driving device fixed on the cross beam, a drill stem, wherein thedriving device is provided with a rotating part; the lower end of the drill stem is connected with the upper end of the protection pipe component through the protection pipe cap; and the drill stem can be driven by the rotating part to rotate and move downward along the axis of the drill stem. The invention also discloses a cone penetration testing method adopting the cone penetration device. By adopting the method of the invention, the defect that when a deep cone penetration test is performed, the cone penetration machine and a drilling machine used for installing the protection pipe are required to be used alternately, can be solved; and only one device can be used to complete the cone penetration test, thus increasing the efficiency and reducing the equipment cost.

The invention relates to a liquefaction judgment method based on standard penetration and static cone penetration test correlation. A principle of selecting a static cone penetration test contrast hole of a standard penetration test hole and a reading method for a standard penetration parameter value N and a static cone penetration parameter tip resistance value qc are provided; three influence factors of clay content rhoc, average particle size D50 and soil parameter alphap are considered, the value N and the value qc are fitted, and a statistically correlative relationship of N-qc is provided; and on the basis, a foundation soil liquefaction judgment method based on a static cone penetration test is provided. By the method, the liquefaction judgment of foundation soil can be made relatively quickly and accurately; and compared with the conventional method, the method is simple, economic and quick, and has a good engineering application value.