现代隧道技术
現代隧道技術
현대수도기술
Modern Tunnelling Technology
2015年
5期
158-164
,共7页
深基坑%大直径盾构%盾构井%顺作法%逆作法%受力分析
深基坑%大直徑盾構%盾構井%順作法%逆作法%受力分析
심기갱%대직경순구%순구정%순작법%역작법%수력분석
Deep foundation pit%Large-diameter shield%Shield shaft%Bottom-up method%Top-down method%Force analysis
基坑工程顺作法施工工艺简单,在浅基坑和中小基坑中受到广泛应用;逆作法工艺虽然复杂,但对于深大基坑安全性好,在结构受力和对基坑变形的控制上,逆作法的优势比顺作法更加明显. 文章以长沙南湖路过湘江大直径盾构隧道南线盾构接收井为例,对盾构井采用顺作法和逆作法的围护结构及主体结构进行了受力分析对比,根据对比结果得出大直径盾构隧道盾构井宜推荐采用逆作法施工的结论, 并通过实例验证了推荐工法的合理性和优越性.
基坑工程順作法施工工藝簡單,在淺基坑和中小基坑中受到廣汎應用;逆作法工藝雖然複雜,但對于深大基坑安全性好,在結構受力和對基坑變形的控製上,逆作法的優勢比順作法更加明顯. 文章以長沙南湖路過湘江大直徑盾構隧道南線盾構接收井為例,對盾構井採用順作法和逆作法的圍護結構及主體結構進行瞭受力分析對比,根據對比結果得齣大直徑盾構隧道盾構井宜推薦採用逆作法施工的結論, 併通過實例驗證瞭推薦工法的閤理性和優越性.
기갱공정순작법시공공예간단,재천기갱화중소기갱중수도엄범응용;역작법공예수연복잡,단대우심대기갱안전성호,재결구수력화대기갱변형적공제상,역작법적우세비순작법경가명현. 문장이장사남호로과상강대직경순구수도남선순구접수정위례,대순구정채용순작법화역작법적위호결구급주체결구진행료수력분석대비,근거대비결과득출대직경순구수도순구정의추천채용역작법시공적결론, 병통과실례험증료추천공법적합이성화우월성.
Compared with the bottom-up method, which is widely used in the construction of shallow, medium and small foundation pits, the top-down method is more complex but has obvious advantages in controlling struc-tural performance and deformation, which contribute to the safety of construction of deep and large foundation pits. Using the receiving shaft on the south line of the river-crossing large-diameter shield tunnel on Nanhu Road of Changsha City as an example, this paper compares and analyzes the forces applied on shafts constructed by the bottom-up and top-down methods, indicating that it's better to choose the top-down method for the working shaft construction of large-diameter shield tunnels.
