本文關(guān)鍵詞： H-M耦合 盾構(gòu)隧道 開挖面 單元狀態(tài)指標(biāo) FLAC~(D)　出處：《巖土力學(xué)》2017年06期 　論文類型：期刊論文

【摘要】：針對富水區(qū)土壓平衡式盾構(gòu)隧道施工進(jìn)行了水-力耦合(H-M耦合)數(shù)值模擬。首先在既有的研究成果基礎(chǔ)上建立了單元狀態(tài)指標(biāo)ZSI(Zone State Index),該指標(biāo)將屈服、破壞接近度等進(jìn)行適當(dāng)變換,統(tǒng)一到單元安全度量體系(負(fù)值代表破壞),實現(xiàn)了單元的彈性、屈服和破壞3種狀態(tài)的完整表達(dá)。然后將應(yīng)變-滲透系數(shù)方程與ZSI結(jié)合,使?jié)B透系數(shù)在耦合的過程中隨單元狀態(tài)發(fā)生改變,彌補(bǔ)了FLAC~(3D)滲流模擬中滲透系數(shù)不變的不足。最后采用FLAC~(3D)的FISH語言二次開發(fā),以大連地鐵202標(biāo)段香工街站-沙河口火車站區(qū)間盾構(gòu)地鐵隧道為例,實現(xiàn)H-M耦合過程的模擬。分析了隧道掘進(jìn)的過程中開挖面及圍巖的變形和破壞特征,根據(jù)開挖面上ZSI的計算結(jié)果對開挖面進(jìn)行了穩(wěn)定性評價。研究結(jié)果表明,該方法可以較好地進(jìn)行H-M耦合過程中模擬和分析,與實測結(jié)果較為吻合。
[Abstract]:According to the hydro mechanical coupling pressure balance shield tunnel construction water rich soil (H-M coupling) numerical simulation. Firstly, the existing research results based on the established unit (Zone State Index ZSI index), the index will yield failure approach index of appropriate transform, unified to the unit security metric system (negative on behalf of destruction) realized, cell elasticity, expression of yield and failure of the 3 State intact. Then strain and permeability coefficient equation combined with the ZSI, the permeability coefficient in the coupling process with state changes, FLAC~ (3D) to make up for the lack of constant permeability coefficient of seepage simulation. Finally using FLAC~ (3D) the two development of the FISH language, based on the Dalian Metro No. 202 Xiang Gong Street Station - Shahekou Railway Station subway shield tunnel as an example, the simulation of H-M coupling process. Analysis of the excavation process of tunnel excavation face and surrounding rock The deformation and failure characteristics of the excavation face are evaluated according to the calculation results of ZSI on excavation face. The results show that the method can simulate and analyze the H-M coupling process better, and is consistent with the measured results.

【作者單位】： 大連海事大學(xué)道路與橋梁工程研究所;大連海事大學(xué)遼寧省公路工程重點(diǎn)實驗室;澳大利亞紐卡斯?fàn)柎髮W(xué)土木系;
【基金】：國家自然科學(xué)基金(No.51678101) 中央高校基本科研業(yè)務(wù)費(fèi)(No.3132014326)~~
【分類號】：U455.43
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本文編號：1498156