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中文摘要：
为了克服已有连拱隧道的荷载取值缺乏理论依据问题，文章基于公路隧道设计规范中普通分离式隧道松动荷载计算公式，选取恰当的计算参数，建立合理的连拱隧道计算模型，得到了双洞四车道连拱隧道的松动圈范围和松动荷载的合理取值，并给出了相应的连拱隧道荷载计算公式，将从分离式隧道松动荷载到连拱隧道松动荷载这一推广过程由纯经验的推导变为半经验半理论的推导，具有更明确的理论依据和更强的参考及使用价值。与现场的实际监测数据等的对比分析，验证了所提出的连拱隧道松动荷载模式的合理性。
英文摘要：
Considering the absence of a theoretical basis for design loads for multi-arch tunnels, appropriate parameters were selected and reasonable calculation models were built based on the load calculation formula for normally separated tunnels. The character of the ＂loose zone＂ and appropriate load values for a four-lane multi-arch tunnel were established, and the formula of load calculation was developed from pure empirical deduction to semi-empirical deduction with more definite theoretical basis. Results indicate that the design load basically agrees with the measured one.
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