Xinjiang Engineering geological characteristics of -

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Xinjiang Engineering geological characteristics of conglomerates and red beds survey points

Protecting and timely treatment or pre-cracking protection measures closed. (3) water activity more strongly. Soluble salt in this region should also pay attention to the impact on groundwater quality. Dam levels in the two exploration holes, grouting and drilling in the corridor revealed that the river bed near the shore, there are low and flat with the groundwater level, increased rapidly in inside: the second is along the fault, there is growing underground cracks and holes in the relative concentration of the local phenomenon. And even individual veins flow emission. Soluble rock formations similar to karst phenomena. Soluble salts from the conglomerate in this and the dissolution of calcareous cement composition. Conglomerates often contain gypsum mineral crystal. Was dissolved in the water quality of groundwater, water quality analysis showed that: Shimenzi reservoir dam groundwater SO4. High ion content, with a strong acid corrosion of ordinary cement. Countermeasures should be taken. f4) foundation seepage control, general permeable gravel drainage combined weak, generally less than 1lJIJ fresh rock permeability rate considering the long-term effects of groundwater and seepage stability of dam foundation to soften the negative impact. Still need to set the seepage curtain. After the curtain and drainage is also very important. This. Shimenzi reservoir behind the dam had taken a drainage hole and drainage project a combination of measures to protect against seepage of abutment. As mentioned above 5 points conglomerate survey work. Conglomerate is a significant geological features more soft rock, easy to soften and damage by disturbance, development, soft interlayer between layers, grown structure type fracture,[link widoczny dla zalogowanych], the shore zone and grow up strong unloading unloading fissures, possessed a strong corrosive than water activities . Combination of the two dam site experience and hydroelectric engineering requirements. Investigation of the main points that the conglomerate rock should be: (1) try to choose a large-scale geological mapping works. In addition to conventional surveying and mapping regional conglomerate focused outside the fault structure. Control layer should be soft interlayer, grown fractured structure, distribution, shore unloading fissures (or tensile cracks) Distribution and morphological characteristics. To grow up fissures in the conglomerate of development rules and the shore, unloading zone changes. Analysis of the adverse effects of the project (2) multi-level layout of holes on the soft interlayer, unloading with border control, identify their characteristics and spatial distribution laws. Conglomerate in the Mud are more development. In total Shimenzi lithologic reservoir dam sandwich 7. The Mud 3. Shek Mun Station Dam were developing the Mud 3. Their impact on the stability and slope stability against sliding abutment are from the controlling end. Shek Mun hydropower dam in the layout of the hole, Level 3, and specialized tracking and testing for exploration adit work to good effect. (3) do a good job by unloading with a conglomerate canyon shore exploration and unloading is very strong, mainly due to steep slope, through the large blocks of rock slope which will inevitably lead to stress concentration, resulting in crack phenomenon in two dam site during unloading unloading band grew up the basic structure intact rock face asked. With no significant difference between other rocks. (4) emphasis on the exploration and testing of water quality analysis of groundwater exploration and larvae L layout should pay attention to the shore, the water level and flat, the water level rose quickly after the other in the topographic trough, weak structural zone with groundwater and other geological exploration and control needs to be focused spring exposed to analyze, determine its causes, to attach great importance to quality of underground water, should be reviewed several times,[link widoczny dla zalogowanych], with Rock and comprehensive analysis of the surrounding water quality, water resistance to ensure the accuracy of determining conclusions. (5) demonstrated in the test without making prior to the full exploration,[link widoczny dla zalogowanych], not intended for the conglomerate to consider aggregates material easy to soften after the disturbed gravel and cement in the higher clay content. Two dam site were not used as building materials conglomerate. 6 Conclusion conglomerate dam site through the formation of two exploration,[link widoczny dla zalogowanych], testing, analysis, evaluation and test construction operation, basic grasp of the engineering geological characteristics, but also through the practice of survey work summarizes the investigation of such an effective method of rock mass (1 ) Xinjiang Red conglomerate layer geological structure in the local climate and environment of the formation of a unique topography, physical and mechanical properties and structure development in fractured form. Detailed investigation shows that demonstration and test run. After taking some engineering measures with the construction of dam formation of such geological conditions. (2) red beds of conglomerate survey work should be combined with features of the engineering geological conditions. Focus on doing the soft interlayer between layers, faults and growth of cracks, unloading zone, groundwater and water exploration, testing and analysis of evaluation. (3) Mineral composition of red beds in Queensland this complicated, hard and soft uniform. Softening coefficient is low, can not meet the requirements of aggregates material. If a pile of stone, its permeability is poor. Related engineering problems must be given

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