CAJ | 학술논문

唐山沿海地区经济在迅速发展，沿海地区城市化规模在扩大，地下水开采量增大，地面沉降加剧。文中分析了唐山沿海地区的水文地质条件，概化为3个含水层、3个弱透水层，共6个压缩层。建立了三维地下水流和垂向一维压缩完全耦合模型。采用25a 的观测资料校正模型，计算值与实测值拟合较好，模型具有较高的仿真性和适用性。预测了10a 末的地面沉降；当地下水以现有开采量开采时，沉降中心累计达1192.3mm，10a 沉降352.3mm，沉降速率为35.23mm·a－1；当地下水的开采量在现有开采量的基础上增加10％时，沉降中心累计达1260.8mm，10a 沉降420.8mm，沉降速率为42.08mm·a－1；当地下水的开采量在现有开采量的基础上减小10％时，沉降中心累计达1088.7mm，10a 沉降247.9mm，沉降速率为24.79mm·a－1。增大10％的地下水开采量，10a 地面沉降量增加68.5mm；减少10％的地下水开采量，10a 地面沉降量减少104.4mm。因此，控制地下水开采量是控制地面沉降的有效方法。
당산연해지구경제재신속발전，연해지구성시화규모재확대，지하수개채량증대，지면침강가극。문중분석료당산연해지구적수문지질조건，개화위3개함수층、3개약투수층，공6개압축층。건립료삼유지하수류화수향일유압축완전우합모형。채용25a 적관측자료교정모형，계산치여실측치의합교호，모형구유교고적방진성화괄용성。예측료10a 말적지면침강；당지하수이현유개채량개채시，침강중심루계체1192.3mm，10a 침강352.3mm，침강속솔위35.23mm·a－1；당지하수적개채량재현유개채량적기출상증가10％시，침강중심루계체1260.8mm，10a 침강420.8mm，침강속솔위42.08mm·a－1；당지하수적개채량재현유개채량적기출상감소10％시，침강중심루계체1088.7mm，10a 침강247.9mm，침강속솔위24.79mm·a－1。증대10％적지하수개채량，10a 지면침강량증가68.5mm；감소10％적지하수개채량，10a 지면침강량감소104.4mm。인차，공제지하수개채량시공제지면침강적유효방법。
Accompanying with the rapid economic growth and urbanization expansion of the coastal areas of Tangshan,the quantity of groundwater exploitation has increased and land subsidence has aggravated.We analyze the hydrogeology condition in this region,and generalizes it into six compressed layers including three aquifers and three aquitards.A fully coupling model of three-dimensional groundwater flow and vertical one-dimensional compression is constructed.The simulation data,derived from the model calibrated with a 25 years observational data,are fitted well with the measured values,which verifies the model validity.According to our prediction, subsidence amount in subsidence center will be accumulatively up to 1192.3mm after 10 years.The subsidence over ten years will reach 352.3mm and the average subsidence rate will attain to 35.23mm·a-1 under present groundwater exploitation.If the amount of groundwater extraction increases 10%on the basis of existing mining quantity,the subsidence amount in subsidence center will achieve 1260.8mm.The subsidence amount in ten years will grow up to 420.8mm and the average subsidence rate will be 42.08mm·a-1 .If reducing the groundwater extraction in 10% based on the existing mining quantity,at subsidence center the subsidence amount will accumulate to 1088.7mm.Subsidence amount in ten years will reach 247.9mm and the average subsidence rate will be 24.79mm·a-1 .Subsidence amount over ten years will increase 68.5mm if the groundwater exploitation extends 10%,and it will decrease 104.4mm if the groundwater extraction reduces 10%.In summary,limiting the groundwater withdrawal is an effective method to control the land subsidence.