Shandong Commercial Daily
recently, a report on the exploration of the Ji'nan underground world, the project was studied by the hydrogeological environment geology of the Shandong geological survey "Ji'nan city geological survey". According to this research result, the spring sensitive area of Ji'nan is confirmed by comparing the exploration results of the previous departments.
Shang Guangyu, a researcher at the Shandong Provincial Hydrology Bureau, provided the understanding that from December 2009, the Shandong Institute of geological survey Hydrogeology and environmental geology initiated the "Ji'nan city geological survey" project. Yang Lizhi, director of hydrology and environmental geology of the Shandong Institute of geological survey, told reporters that the geological exploration used for 5 years, combined with previous thousands of drilling samples, more than 100 new drilling samples, mainly concentrated in the East and the north of Ji'nan. The exploration concluded at the end of last year, and built a 3D visualization geological model of 700 square kilometers of Ji'nan city on the computer. "Through this model, we can narrow down the land and drill to the ground to see any level of any land." Yang Lizhi said.
reporters learned that in recent years, many departments and units have explored the geology of Ji'nan. Shang Guangyu, a Research Institute of the Shandong provincial Hydrographic Bureau, told reporters that before Ji'nan has carried out geological exploration for the construction of the subway, the Hydrological Bureau of the Shandong province has carried out a comprehensive exploration of the hydrogeology of Ji'nan and hit a thousand hole exploration holes.
Shang Guang Yu said that repairing the subway in igneous area does not affect the spring water. "West of Li Li Zhuang, east to Wang Sha Ren Zhuang, NANDA Liu Changshan, Yanzi mountain, north to Sai Zi store, gabbro based igneous rock separated water body, that is, the Ji'nan rock mass, area of 330km2. It is obvious that in underground water igneous rock, the underground lines must not be repaired. "
at the same time, repairing the subway in the deep groundwater area does not affect the spring water. Shang Guangyu said that the urban area was directly supplied by the ten road and the south of the city and south of the industrial South Road, and the groundwater level was deeper than 20m for many years. Such as the western side of the Austrian body, the highest in 2005 in the past 40 years, the abundance, flat and dry periods were 37m, 49m and 89m respectively. The construction of underground lines at the top of the vadose zone to the top of the local aquifer will not affect the supply of spring water.
and in the sensitive area of spring water, the subway should be carefully handled. Taking the spring group as the center, from the west to the River Street, the east to the Shandong Road, the north side of the ten road, the south of the Ming Lake Road, the Spring City Road and the fountain street, are the sensitive areas of the spring water. "The area is densely packed with shallow groundwater, high water level and large karst caverns. In order to protect the famous springs, it is not recommended to build underground lines in sensitive springs. "
and according to the research conclusion of the hydrogeological and environmental geology of Shandong Geological Survey Institute, the areas not suitable for subway construction are south of Ming Lake Road, north of ten road, east of Shun River Street, and west of Lishan road. The typical unsuitable sections are the Quancheng Road, the source street, the calendar mountain road to the ten section, the ten road Ji'nan National Fitness Center - Yang head valley.
according to the research results of the Ji'nan city geological survey project of the hydrogeological and environmental geology of the Shandong Geological Survey Institute, the areas not suitable for the construction of the subway are south of the Ming Lake Road, the north of the ten road, the east of the Shun River Street and the west of the Lishan road. This area is basically consistent with the spring sensitive area introduced by Shang Guang Yu. That is to say, the research of the Provincial Geological Survey Institute once again confirmed the "sensitive area of spring water" in Ji'nan.
the genesis of the exploration results
spring group is consistent - the groundwater is blocked by the rocks and ejected from the
based on the three-dimensional visualization geological model established by the hydrogeological and environmental geology of the Shandong Geological Survey Institute. The southern mountainous area of Ji'nan is recharged by rainfall and river seepage, and the water flows from south to north. The urban area is blocked by the water gabbro. The water level rises and flows along the limestone fracture channels to form the spring group. This statement is basically consistent with the origin of spring in Shang Guang Yu's analysis.
Shang Guangyu told reporters that groundwater is supplied by atmospheric precipitation and leaked by river channels, and the natural flow is generally southeast to northwest. The groundwater from the valley of the Pakistan River, Juye River, Shihe River, Daxin River and Xingji river is blocked by the Ji'nan igneous rock, forming the four major springs of Baotu Spring.
Baotu Spring and hehequan area, the Quaternary thickness is 8 to 10m, and only 2 meters thick is brittle brittle cemented conglomerate. The karst groundwater with high head buried under it is poured out of the surface through the dense fractured zone of the conglomerate, forming a spectacular karst water spring group. Five Longtan and pearl spring are gushed through the overlying igneous fissure dense zone. The scope of
spring is different - a "one bowl of water", a "two bowls of water"
according to the "Ji'nan city geological survey" made by the Shandong Geological Survey Institute, the west of the east of Ji'nan spring region, the East dock Village in the East, the Liu Zhiyuan, the Zhang Ma Tun and the East dock break of the Yellow Henan bank. The southern part of the west is the boundary of the Mashan fault in the north of Mashan, Changqing, Mashan, Sun Village, Changqing Xiguan, Lao Tun and the Yellow River, and the southern part of the late Archaean magmatic intrusive rocks is the boundary, and the northern part of the Yellow River has been extended to the Qihe Guangrao in Taiping town to the county of Jiyang, with a total area of 2370 square kilometers.
and according to the Research Report on the Jinxi pumping test and Ji'nan water supply water supply, provided by Shang Guangyu, a researcher at the Shandong Hydrological Bureau and the scope of the Ji'nan spring area, the coal bearing strata of the west wing from the port village, the white Valley pile and the beachhead area of the beachvillage are the relative water separation boundary, and the igneous rock mass (water separation boundary) west to the western part of the urban area. The Lang Maoshan - Wan Lingshan karst weak development zone (pervious weak pervious boundary), South Da Xing Long Shan, mining village, Longwan, NNU waist area, the watershed of Laiwu basin and the north of Laiwu basin, is the boundary of water separation, and the north and northwest to Ji'nan igneous rock is the water barrier frontier, which is water septum. The boundary. The area of the Ji'nan spring area is 818.5km2.
it is understood that the two investigations are different to the spring area. The Shandong Institute of geological survey supports the "one bowl of water" point of view. That is, the groundwater in Western Ji'nan is associated with the spring water in Ji'nan city. "We think the north of the Yellow River is also a spring area, and the spring is flowing through the south," Yang Lizhi said. Shang Guang Yu supports the idea of "two bowls of water", that is, the groundwater of Jixi and the springs of Ji'nan are two independent individuals.