本文選題：緩坡 + 降雨入滲　； 參考：《昆明理工大學(xué)》2017年碩士論文

【摘要】：隨著城鎮(zhèn)化的推進(jìn),為了避免占用大片優(yōu)質(zhì)耕地,許多建筑開始向一定坡度的緩坡地帶發(fā)展;在城鎮(zhèn)化推進(jìn)的過程中,大量的高層建筑開始興建,為滿足人防工程、地下車庫及相關(guān)設(shè)施的要求,都包含地下室部分,在設(shè)計(jì)地下室基礎(chǔ)時(shí),必須要考慮到地下室抗浮水位的設(shè)計(jì)。在現(xiàn)有的抗浮水位設(shè)計(jì)中大多依靠多年的地下水位監(jiān)測(cè)資料或?qū)?chǎng)地整個(gè)區(qū)域的地質(zhì)條件的熟悉,但這恰恰是許多單位所缺乏的。如何依靠現(xiàn)有的氣象資料和勘察設(shè)計(jì)資料確定抗浮水位成為一個(gè)迫切需要解決的問題。本文針對(duì)這一問題選取某一坡地,分析影響該場(chǎng)地地下水位的影響因素和場(chǎng)地區(qū)域地質(zhì)條件,采用Geo-Studio有限元計(jì)算軟件分析不同降雨條件下緩坡坡體內(nèi)滲流場(chǎng)的變化及降雨與地下水的補(bǔ)給關(guān)系;然后分析了同一降雨條件下不同坡度緩坡內(nèi)滲流場(chǎng)的變化,最后在確定抗浮水位的情況下,計(jì)算緩坡地帶地下室底板的地下水滲流情況。具體的研究工作如下:1.分析緩坡所處區(qū)域的地質(zhì)特點(diǎn)、地下水的賦存形式及來源,確定了影響該區(qū)域地下水的主要因素是降雨;2.運(yùn)用Geo-Studio二維有限元軟件分析了不同降雨條件下緩坡內(nèi)滲流場(chǎng)的變化及其地下水位線的變化,并分析了在降雨過程中隨著降雨量、降雨強(qiáng)度、降雨時(shí)長的變化,坡面坡體內(nèi)體積含水率和孔隙水壓力的變化,研究了入滲雨水的運(yùn)移規(guī)律。分析計(jì)算結(jié)果得出:降雨強(qiáng)度越大,容易在坡面形成徑流,對(duì)坡面垂直深度影響較小,引起坡腳處地下水位上升的高度較小;降雨強(qiáng)度越小,降雨時(shí)間較長,雨水容易入滲坡體,入滲深度也越大,引起地下水位上升也較高;3.分析了在相同的降雨強(qiáng)度條件下不同坡度緩坡地下水位線的變化,計(jì)算結(jié)果表明:坡度越大,雨水越不易在坡面停留,對(duì)坡面的縱向影響深度越小,坡腳處地下水位線高度越低;4.利用確定的緩坡抗浮水位,計(jì)算了地下室在該水位并存在水頭差的情況下,底板孔隙水壓力的大小,并與采用改進(jìn)阻力系數(shù)法公式計(jì)算結(jié)果對(duì)比,結(jié)果表明計(jì)算誤差較小,該公式可用于計(jì)算該種情形下地下室底板的浮力大小。
[Abstract]:With the promotion of urbanization, in order to avoid large area of high quality arable land, many buildings have begun to develop to a certain slope. In the process of urbanization, a large number of high rise buildings have begun to build. In order to meet the civil air defense project, the requirements of underground garage and related facilities include the basement part. When the basement is designed, it is necessary. It is necessary to take into account the design of the anti floating water level in the basement. Most of the existing anti floating water level designs depend on the monitoring data of the groundwater level for many years or the geological conditions of the whole area, but this is precisely the lack of many units. In this paper, this paper selects a slope to analyze the influence factors of the ground water level and the regional geological conditions of the site. The Geo-Studio finite element software is used to analyze the changes in the seepage flow in the gentle slope of the slope under different rainfall conditions and the relationship between the rainfall and the recharge of the groundwater; then the same is analyzed. Under the condition of rainfall, the seepage flow field of different slope gentle slope is changed. Finally, under the condition of determining the anti floating water level, the groundwater seepage in the basement floor of the gentle slope zone is calculated. The specific research work is as follows: 1. the geological characteristics of the region where the gentle slope is located, the form and source of the groundwater are determined, and the main factors affecting the groundwater in this area are determined. The factor is rainfall; 2. the changes in the internal seepage flow field and the change of the groundwater level line in the gentle slope under different rainfall conditions are analyzed by the Geo-Studio two dimensional finite element software, and the changes of the rainfall, rainfall intensity and the length of the rainfall in the process of rainfall are analyzed, and the changes in the volume of volume of water and pore water pressure in the slope of the slope are studied. The calculation results show that the larger the rainfall intensity, the runoff is easy to be formed on the slope, the lower the vertical depth of the slope, the smaller the elevation of the groundwater level at the foot of the slope, the smaller the rainfall intensity, the longer rainfall time, the easy infiltration of the slope, the greater the infiltration depth, and the higher groundwater level. 3. the change of water level line of different slope gentle slope under the same rainfall intensity is analyzed. The calculation results show that the greater the slope, the less easy the rain is to stay on the slope, the smaller the longitudinal influence depth of the slope is, the lower the height of the groundwater level line at the foot of the slope; and 4. to calculate the existence of the basement at the water level by using the determined gentle slope anti floating water level. In the case of poor water head, the size of the pore water pressure of the floor is compared with the calculated result by the formula of the improved resistance coefficient method. The result shows that the calculation error is small, and the formula can be used to calculate the buoyancy size of the basement floor in this case.

【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU463;TU943.1

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