Landslides induced by typhoon rainstorm has the characteristics of abruptness and difficulty in the investigation. Taking the Shanzao landslide that occurred during the typhoon "Lekima" as an example, based on 24 landscape data of Railway Sentinel-1 from Sept. 12, 2017, to Aug. 9, 2019, this paper analyzed the sequential cumulative deformation of landslides in this period by SBAS-InSAR technology and further analyzed the regularity of surface deformation of landslide mass with meteorological data. The results show that the deformation before the occurrence of Shanzao landslide is mainly divided into three stages: creep stage of landslide mass, deformation of front edge of landslide mass increases significantly and gradually expands toward the middle of the slope mass, and accelerated deformation stage of the rear edge of landslide mass. The vertical deformation rate and accumulated deformation data of InSAR monitoring points on the landslide mass show that the deformation rate and accumulated deformation in the front and middle of slope are small, and it mainly focus on the rear edge of the landslide, with the maximum deformation rate and accumulated settlement of 40 mm/a and 320 mm respectively. The landslide is a push-over landslide. The research results provide a new idea and method for the early identification, monitoring and early warning of landslides, and have a certain reference value for the prevention and control of landslide disasters.

In order to study the shear resistance of the inclined section of steel fiber reinforced concrete beams with BFRP bars, this paper takes the steel fiber reinforced concrete beams with BFRP bars as the research object, and carries out the shear capacity tests of 9 steel fiber reinforced concrete beams with BFRP bars. The effects of failure mode, shear span ratio, BFRP reinforcement ratio, steel fiber volume fraction, and steel fiber range on the shear resistance of steel fiber reinforced concrete beams with BFRP bars are analyzed. The results show that the failure mode of steel fiber reinforced concrete beams reinforced with BFRP is mainly shear failure; The shear capacity of the inclined section decreases with the increase of shear span ratio, and increases with the increase of fiber content and BFRP reinforcement ratio; Setting steel fiber within the shear span of the support can better improve the shear resistance of the inclined section of the concrete beam with BFRP reinforcement. Finally, the formula for calculating the shear capacity of steel fiber reinforced concrete beams with BFRP bars is obtained by fitting test data, and the calculated results of the formula are consistent with the experimental results. The research enriches the design theory of inclined section of FRP reinforced concrete composite structure, and has reference value for the application of FRP reinforced steel fiber concrete composite structure in practical projects.

In order to effectively grasp the reactivation mechanism and deformation law of the old landslide, this paper takes the bedding old landslide in a metamorphic rock area as the engineering background and combines the deformation monitoring results to carry out the existing deformation law analysis and deformation prediction research. The result of the case analysis shows that the deformation characteristics of the resurrection body of the old landslide are significant, especially the deformation in the middle of the resurrection body. Through the deformation prediction, it is concluded that the cumulative deformation of the resurrection body will still increase, and its stability will tend to weaken. Among them, the deformation in the middle position has no trend of convergence, that is, the increase rate will also tend to increase, and its stability will weaken more, so it is very important to carry out its prevention and control.

The measured deformation data contain rich temporal and spatial information and evolution laws of dam deformation. To study the co-integration relationship of the aging deformation of extra-high arch dams, wavelet decomposition was firstly used to obtain the aging component of the dam displacement. Considering the weak spatial integrity of extra-high arch dams, the FCM clustering algorithm was utilized to realize the regionalization of aging deformation. With the help of the idea of regional linearization, the spatial nonlinear co-integration relationship of the whole dam aging deformation was transformed into several approximate linear co-integration relationships within different regions. The zonal co-integration model was established to describe the development law of time-varying co-integration in different regions of the dam. The co-integration development monitoring and early warning of multi-measuring points aging deformation were realized by co-integration residual.

Based on elasto-viscoplastic theory of Perzyna and strain energy theory and 3D yield criterion considering the effect of intermediate principal stress, a mesoscopic coupled elasto-viscoplastic-damage model is developed in order to explore the intermediate principal stress effect on the time-dependent behavior of deep hard rock in excavation damage zone. The model is implemented in a software for engineering rockmass fracturing process (CASRock). By comparing modeling results with experimental results, the model and the code are validated. Furthermore, the time-dependent behaviour of ^#1 laboratory of CJPL-II project is simulated, and the time-dependent fracture process of hard rock in excavation damage zones under different intermediate principal stresses are investigated. The results show that the time-dependent fracture behavior of hard rock exhibits an obvious interval effect of intermediate principal stress. It is found that the interval effect of the intermediate principal stress is affected by time through the isochronous curve clusters of the total viscoplastic strain and the intermediate principal stress. Finally, the existence of the excavation damage zone can promote the development of time-dependent fracture of its internal surrounding rock, thereby expanding the scope of the plastic zone.

In order to make up for the shortcomings of the single Gini coefficient method in the evaluation of spatial equilibrium of water resources, it needs to systematically evaluate the matching relationship between water resources and social development. Selecting arable land area, population size, industrial and agricultural output value and gross product in Xinjiang as the indicators, which affects the carrying capacity of water resources, combination of correlation number method and Lorenz curves was used to quantitatively analyze the equilibrium between regional and sub-regional water resources and indicators. Five element subtractive set of potentials was adopted to identify the development of equilibrium of sub-regional water resources. The results show that the overall water balance in Xinjiang has been rising and then falling during 2011-2018, and is uneven from year to year. The analysis of the indicators shows that the water balance fluctuates between uneven and uneven. The analysis of the sub-regional water balance and trends shows that most areas are in an uneven and inverse state, and exacerbates the unevenness of water resources and identifies the targets for water balance regulation, which points out the direction for reasonable improvement of the balance of water resources.

The three-dimensional seepage analysis and control of underground plants and complex tunnels are related to the long-term seepage safety of underground spaces, which is one of the key technical issues facing the construction of pumped storage power stations by abandoned coal mines. Considering the reinforcement schemes for different surrounding rocks of the lower reservoir, the spatial location of the upper reservoir, the main powerhouse and the coal mine extraction area, a refined three-dimensional finite element model for seepage analysis of complex underground space in Longdong coal mine was established. Three-dimensional seepage field analysis was carried out for typical working conditions during the construction and operation periods. Important design parameters such as external water pressure and seepage volume of the underground tunnels during the construction and operation periods were obtained. Refined simulation of the numerous drainage holes in pumped storage power stations was implemented. By calculations of the seepage field under various unfavourable conditions, the optimal spacing of the drainage holes was determined. The research results are of great significance in the evaluation of seepage safety and the design of underground roadway protection schemes for the construction of pumped storage power stations by abandoned coal mines.

The common deformation and failure mechanism of retaining wall at foot of earth-rock dam is mainly caused by insufficient bearing capacity of foundation, uneven settlement of foundation, temperature effect or insufficient anti-sliding stability. For a certain project, the retaining wall deformation characteristics are not consistent with the above causes after the drainage of the embankment foot of the earth-rock dam is changed to the retaining wall. The deformation is only visible at the expansion joints of the retaining wall, and the expansion joints are open, closed or misplaced. Through calculation and analysis, it is found that the expansion joint deformation is caused by the retaining wall horizontal displacement caused by the consolidation settlement of the dam, and the size of the deformation is related to the horizontal displacement difference between adjacent retaining walls. The larger the displacement difference is, the more serious the deformation is. At the same time, the horizontal displacement of retaining wall is related to the height of dam section, hydrogeologic conditions of dam foundation. Based on this, it is proposed that after the prism drainage of the downstream earth-rock dam is changed into gravity retaining wall, in addition to the design and calculation according to the standard requirements, the horizontal displacement difference between retaining walls should also be calculated, and the damage of retaining wall displacement and poor drainage to the downstream drainage system of the dam body should be considered. The research results have a good reference value for the correct analysis of deformation mechanism and anti-slip design of retaining wall at dam foot.

The nonlinear equation was established for the incipient motion of sediment under constant flow, including Reynolds number, Hiltz number and sediment erosion intensity. Based on cusp catastrophe theory, this experimental process focused on the main factors affecting incipient motion of sediment and bottom riverbed scouring, and considerd different flow intensity conditions. The Reynolds number of sand particles from other experiments was used in the nonlinear equation of this study to verify the influence of Reynolds number. The theoretical value calculated by this formula has a strong consistency with the test value, after comparing the results and data. Therefore, this nonlinear equation can basically meet the requirements for predicting the scouring intensity of fine sediment.

For the transmission line distributed traveling wave fault ranging system, this paper proposes a distributed fault location matrix algorithm of transmission lines based on traveling wave time difference information. The algorithm uses the principle of double-ended traveling wave ranging to construct the lower triangular fault location matrix by combining the monitoring node data two by two. The nature of matrix rank was used to select the fault point area and calculate the fault location distance simultaneously. The matrix zeroing algorithm was set to accelerate the find of matrix rank. The distance correction algorithm was set to improve the accuracy of positioning results. The applicability and reliability of the distributed traveling wave fault location matrix algorithm for transmission lines were verified by modeling and simulation with PSCAD and MATLAB software. The necessity of the corrected zeroing algorithm and the significant improvement of the distance correction algorithm on the fault location accuracy were demonstrated by comparison during the operation.