9 results about "Geomorphology" patented technology

The invention discloses a rapid construction method of a long tunnel under complex geologic conditions, which comprises the following steps: S1, carrying out 30-150m long-distance geologic prediction on the geologic conditions of a tunnel, and carrying out 5-30m short-distance geologic prediction on the geologic conditions of the tunnel on the basis of the long-distance geologic prediction; S2, excavating wall rocks of IVb and V levels according to the geologic prediction conditions by adopting a bench cut method, and excavating wall rocks of III and IVa levels by adopting a full section method; S3, predicting underground water pressure of the tunnel at the water-rich section according to the geologic prediction conditions, and adopting different curtain grouting schemes; and S4, after tunnel excavation, monitoring and measuring the geologic conditions, primary support conditions, peripheral displacement and vault sinking value. The rapid construction method has the beneficial effect of safely and rapidly finishing tunnel construction tasks under poor geologic zones.

The invention provides a carbonatite reservoir stratum inversion method and system with transverse sedimentary argillaceous influence elimination. The method comprises: according to processed base data, forward rock physical modeling is carried out to obtain a forward modeling result including physical elastic rock characteristics of sedimentary argillaceous limestone, limestone cave filling clay, pure limestone, and the reservoir stratum; on the basis of the physical elastic rock characteristics of the sedimentary argillaceous limestone, a correspondence relation between the carbonatite sedimentary argillaceous characteristics curve and elastic impedance is constructed; according to the correspondence relations, corresponding to wells in a research area, between the carbonatite sedimentary argillaceous characteristics curves and elastic impedances, a carbonatite sedimentary argillaceous background impedance body is generated; geostatistics inversion is carried out based on the processed base data to obtain a carbonatite reservoir stratum impedance body; and the carbonatite reservoir stratum impedance body and the carbonatite sedimentary argillaceous background impedance body are coupled to obtain a carbonatite reservoir stratum inversion result with transverse sedimentary argillaceous changing influence elimination. Therefore, the predicted reservoir stratum and the actual reservoir stratum match each other; and the precision is high.

The invention relates to a Yangtze River navigation reference surface determination method. The method comprises the following steps: observing and obtaining the perennial observation water level height of a water level observation point; selecting the navigation reference altitude; selecting the navigation channel middle line; generating a spacial navigation channel middle line; generating a smooth spacial navigation channel middle line; generating a continuous smooth navigation reference surface; and converting the water depth data. The method has the following advantages: (1) a smooth, continuous, and complete navigation reference surface is obtained, the reliability of correction of water level of bathymetric data is improved, and the operation steps are simplified; (2) the amount of data that is needed to be processed is reduced, and the processing efficiency of relative water depth data is improved; (3) the normalization and standardization of Yangtze River hydrologic observation are promoted, and basic information support is provided for depth datum determination and Yangtze River horizontal plane analysis and prediction; (4) water level observation data is collected and unified for the Navigation Bureau of Yangtze River.

The invention provides a tunnel loose block fracture zone building method. An explosive drilling hole is respectively formed in two side walls of the tunnel; the height of a blast hole is the same as the height of a receiver; then micro-vibration is conducted after all elements are well arranged; a hole is drilled in a tunnel face by an advanced horizontal drilling machine; the rest holes are all outwardly drilled except the center drilling hole drilled along an axis of the tunnel; an annular various-pit drilling method is employed for excavation; water is discharged from an inner cave during construction; water drainage slopes are preserved in the longitudinal and transverse direction during excavation of the upper, lower and middle parts; water is led to the axial middle part of the tunnel, so the arc wall foot is depowered and water on the work surface can be instantly pumped to a water pit; the cave is kept dry and immersion damage to an inverted arch and a wall foundation soil layer by accumulated water can be prevented; and then each part is excavated in a circular way. Deficiencies existing in a super-support are analyzed; parameters affecting support effect is researched and adjusted on the basis of the original design scheme; optimum parameters are determined via tests and great supporting effect is achieved; and scheme changes are avoided and cost is reduced and construction progress is ensured.

The invention discloses a construction method for a large cross-section tunnel passing through longitudinal hard-soft-hard strata. The construction method comprises the following steps that boundariesof the hard-soft-hard strata are determined; upper steps of the two hard rock strata are excavated by blasting, rock pillars are reserved separately, excavation areas are reinforced with feet-lock bolts, and primary supports of the upper steps are constructed separately; the soft stratum in the area where the upper steps are excavated is reinforced; the two rock pillars are removed, and temporarysupports are constructed; an upper step of the soft stratum is excavated, and primary supports are constructed and a bottom reinforcing layer is reserved; lower steps of the two hard rock strata areexcavated by blasting, rock pillars are reserved separately, excavation areas are reinforced with feet-lock bolts, and primary supports of the lower steps are constructed separately; the soft stratumin the area where the lower steps are excavated is reinforced; the two rock pillars and the temporary supports are removed, a lower step of the soft stratum is excavated, bottom primary supports, an inverted arch and a second lining are constructed, and construction joints are reserved; and the construction steps are repeated until the tunnel construction is completed. According to the construction method for the large cross-section tunnel passing through the longitudinal hard-soft-hard strata, the construction risk is reduced greatly, and social and economic benefits are remarkable.

The invention discloses a method for measuring a diameter at breast height of a tree in a permanent sample plot by multi-piece continuous photogrammetry. The method disclosed by the invention is mainly applied to small-scale forest resource survey, continuous photogrammetry is performed around the permanent sample plot by using a fixed-focus camera, and the fixed-focus camera is used as a tool toperform photogrammetry along the circumference and a diagonal direction of the permanent sample plot to take a digital photo of the sample plot; and a three-dimensional model of the tree in the sampleplot is extracted, and coordinates (x, y, z) and the diameter at breast height of each sample tree in the sample plot are obtained by matching and constructing the three-dimensional model of the sample plot.