【摘要】：本文主要圍繞巖體基坑地下室抗浮設(shè)計水頭取值問題，針對平坦地貌和坡地地貌對其進行研究。通過理論分析提出施工期間極端天氣條件下，地下室抗浮水頭取值建議公式，以便設(shè)計和施工單位根據(jù)研究結(jié)論制定相應(yīng)抗浮措施，滿足工程實際需要。 首先，分析了巖體基坑的地質(zhì)特點、地下水的賦存形式及來源，闡述了回填土對地下結(jié)構(gòu)抗浮設(shè)計的影響、地下水的滲流特性和基本定律。 其次，通過研究基坑地下水位增量的計算方法，給出了平坦地貌巖體基坑施工期間的抗浮水頭取值建議公式，并定量分析了不同條件下的抗浮水頭值。 第三，針對坡地地貌巖體基坑的特點，依據(jù)滲流學(xué)和流體力學(xué)基本原理，以二維穩(wěn)定流為前提，得出降雨條件下的水頭計算模型，為后續(xù)分析奠定理論基礎(chǔ)。 第四，制作試驗?zāi)Ｐ�，將坡度和降雨量作為變量，模擬坡地地貌巖體基坑地下室周邊回填土在暴雨時期地下水位的變化情況，根據(jù)試驗結(jié)果改進水頭曲線模型，簡化抗浮水頭取值公式。 第五，，利用GeoStudio軟件對室內(nèi)模擬試驗工況進行有限元分析，驗證簡化的抗浮水頭取值公式的合理性。 最后，結(jié)合青島嶗山市民文化中心工程，通過現(xiàn)場水位測試，分析其抗浮設(shè)計的合理性，驗證抗浮水頭計算公式的實用性。
[Abstract]:This paper focuses on the selection of the head of the basement anti-floating design of rock foundation pit, and studies the flat geomorphology and the slope geomorphology. Based on the theoretical analysis, this paper puts forward the suggested formula for selecting the value of anti-floating head of basement under extreme weather conditions during construction, so that the design and construction units can formulate the corresponding anti-floating measures according to the research conclusions, and meet the practical needs of the project. Firstly, the geological characteristics of rock foundation pit, the occurrence form and source of groundwater are analyzed, and the influence of backfill on the design of subsurface structure anti-floating, the seepage characteristic and basic law of groundwater are expounded. Secondly, by studying the calculation method of the increment of groundwater level of foundation pit, the formula of the value of anti-floating head during the construction of foundation pit of flat geomorphic rock mass is given, and the value of anti-floating head under different conditions is quantitatively analyzed. Thirdly, according to the characteristics of slope geomorphologic rock foundation pit, according to the basic principles of seepage and hydrodynamics, the hydraulic head calculation model under rainfall condition is obtained on the premise of two-dimensional steady flow, which lays a theoretical foundation for subsequent analysis. Fourth, make the test model, take slope and rainfall as variables, simulate the change of groundwater level around the basement of foundation pit of slope geomorphology, improve the model of water head curve according to the test result. Simplify the value formula of anti-floating head. Fifthly, the finite element analysis of indoor simulated test condition is carried out by using GeoStudio software, which verifies the rationality of the simplified formula for selecting the value of anti-floating head. Finally, the rationality of the anti-floating design is analyzed through the on-site water level test, and the practicability of the calculation formula of anti-floating head is verified by combining the project of Laoshan City Citizen Culture Center in Qingdao.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU943.1

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