地鐵隧道施工外文文獻(xiàn)翻譯

1、文檔從互聯(lián)網(wǎng)中收集，已重新修正排版，word格式支持編輯，如有幫助歡迎下 載支持。(含：英文原文及中文譯文) 文獻(xiàn)出處： Cocheril Y. Study on Construction Technology of Multi-Arch Tunnel Group in Urban Underground RailwayJ. Journal of Communications, 2015, 3(4):22-32.英文原文Study on Construction Technology of Multi-Arch Tunnel Group in Urban Underground Railway

2、Y CocherilAbstractIn this paper, the construction method of the multi-arch tunnel group is discussed by using an engineering example of Metro Line 3. In the construction of the subway, the construction technique of changing a multi-arch tunnel into a single-hole tunnel was first proposed. The techni

3、cal solutions of the single-middle wall and the separated middle-wall structure were compared and selected to meet the requirements of structural safety, construction safety, and economic efficiency. Good technical solutions can provide reference and reference for the design and construction of simi

4、lar projects in the future.Keywords: multi-arch tunnel group, single middle partition wall, separated middle partition wall, construction technologyBecause of the design requirements of the subway tunnel, a variety載支持。 of tunnel structures are required. Among them, a multi-arch tunnel segment consis

5、ting of unequal cross-linked arches and triple-arched tunnels is often used for the connection of the main line and the crossover line. This article combines the project example according to the geological conditions of the tunnel, the time limit requirements through comparison and selection of the

6、best construction program that can achieve rapid construction and save construction costs.Project OverviewThe return line of Sports West Road Station on Metro Line 3 is a complex type of return line from Sports West Road Station. In the section , a tunnel group with unequal spans with double arches

7、and triple arches was set up. Unequal cross-arch tunnel excavation span of 20.1m excavation height of 10.076m cross-vector ratio of 1:0.5 hole lining after the lining of 5.2m large-hole lining after the span of 11.4m in the wall thickness of 1.6m. The triple-arch tunnel excavation span is 19.9m and

8、the 7.885m cross-vector ratio is 1:0.1. The surrounding rock of the section of the multi-arch tunnel is from top to bottom: artificial backfill, red sand and alluvial sand layer, alluvial-diluvial earth, fluvial-lacustrine sedimentary soil, plastic residual soil, hard plastic-hard residue. Soil, wea

9、thered rock formations, strong weathered rock formations, weathered layers, and weathered layers. Tunnels through the formation of more homogeneous rock strength, strong bearing capacity and stability. The文檔從互聯(lián)網(wǎng)中收集，已重新修正排版，word格式支持編輯，如有幫助歡迎下 載支持。 thickness of the vault covering the tunnel is 15.518m

10、, and the thickness of the surrounding rock layer IV is The buried depth of groundwater in the section of the multi-arch tunnel is , mainly Quaternary pore water and fissure water.double arch construction planDue to the complex structure of the multi-arch tunnel section, the tunnel section changes g

11、reatly. The construction process is complex and the construction is difficult. The construction period is long. Therefore, it is very important to choose a good construction scheme to complete the construction of the multi-arch tunnel section with high quality and efficiency. When selecting a constr

12、uction plan, the following aspects are mainly considered: 1 Construction safety and construction Safety 2 Construction difficulty 3 Construction cycle 4 Economic benefits. Based on these four principles, the following two construction plans were selected for comparative selection through the researc

13、h and demonstration of the construction plan.Single Wall Construction PlanThe main construction steps and measures of this program are as follows: 1 Prevent the construction of the middle wall from timely construction after the completion of the construction of the temporary construction channel, do

14、uble-arched and triple-arched intermediate wall from the double-arched tunnel on the right line to the return line side. . 2載支持。 After the construction of the middle wall lining is completed, the CRD construction method for the right line shall be used for the construction of the large-span tunnel o

15、f the re-entry line in accordance with the principle of “small first, large, and closed”. (3) When the construction of the triple-arch tunnel on the side of the re-entry line is carried out, the construction of the triple-arch and double-arched middle wall shall be carried out in accordance with the

16、 construction method of the middle-wall of the right line. After the completion of the construction of the four-fold line on the side of the middle wall, the construction of the right line will continue. This construction method is applied to the general construction methods of domestic double-arch

17、tunnels in Guangzhou Metro, Nanjing Metro and Beijing Subway, and can safely and smoothly complete the construction of tunnel groups. However, the study of previous engineering examples and construction techniques can reveal that the program still has shortcomings and defects. 1 This scheme is appli

18、ed frequently in this project. The initial support and the secondary lining of the tunnel within the short 21.11m multi-arch tunnel will convert 4 times. 2 The waterproof layer construction, reinforcement engineering, formwork engineering, and concrete pouring involved in the lining of the middle wa

19、ll and side tunnels all require multiple conversions and a construction period of up to 2 months. After the completion of the lining, the investment of the anti-bias support of the middle wall and the文檔從互聯(lián)網(wǎng)中收集，已重新修正排版，word格式支持編輯，如有幫助歡迎下載支持。 equipment and equipment will lead to higher construction co

20、sts and lower economic benefits.Separated Wall Construction PlanThe main construction steps and measures of this plan are as follows: 1 Change the unequal span double-arch tunnels into two single holes to change the separation-type mid-rise wall first from the right-line single-line tunnel construct

21、ion. 2 Double-arched tunnels will not be used for middle-liner lining under single-line conditions. 3 The right-sided large-section double-arch tunnel passes through the side wall of the CRD method. For the 4 fold back line, the construction is performed in the reverse order of the right line. Adopt

22、ing this scheme is actually a comparison between the two single-line construction methods and the previous one. This has the following advantages: 1 Reduce the number of construction processes and speed up the transition of the process. 2 Reduced the difficulty of construction and shortened the cons

23、truction period. 3 Reduced construction costs and increased economic efficiency. 4 The change to a single wall in the middle of the wall has completely solved the waterproofing defects of the double-arch tunnel structure. 5 The construction of the middle tunnel of a triple-arch tunnel is equivalent

24、to a large-span tunnel with reserved core rock, which is conducive to the construction of safety double-arch tunnels on both sides.Three Arches Construction PlanFrom the right line directly into the triple-arch tunnel, its supporting parameters are based on the original design, and the entire ring i

25、s installed. The whole ring is sprayed on the design and the anchor bar at the middle wall is reinforced. The re-entry side is the same as the right-line construction method. It is necessary to remove a longitudinal reinforcement beam at the junction of the tunnel grille. Strictly control the distan

26、ce between each step of the excavation footage grid is 0.6m/榀.The middle-wall excavation adopts a weak-weak-weakening blasting scheme to conditionally use the static blasting scheme to minimize the disturbance to the middle-wall rock formation and the lining tunnel to ensure construction safety. The

27、 secondary lining is performed immediately after the middle wall excavation is completed. After the completion of the construction of the middle wall, the gaps in the middle walls will be backfilled with jack support. Only one side of the construction is completed before the other side of the wall c

28、onstruction.After the completion of the construction of the middle walls on both sides, the secondary lining of the single-hole tunnels on both sides shall be promptly conducted, and then the excavation and lining of the middle rock mass of the triple-arch tunnel shall be carried out. Special attent

29、ion should be paid to the settlement and convergence deformation of the triple-arch tunnel at the middle of construction.Analysis of structural behavior during constructionChanged the cancellation of mid-walls that do not cross double arches into separated walls. There is no similar engineering desi

30、gn and construction experience in domestic urban subway projects, and there is no similar tunnel structure design. Therefore, whether the structure is safe and whether the construction process is changed during the construction process. Safety will be the focus of this program. Using ANSYS finite el

31、ement general program software to perform numerical simulations on unequal cross-arch tunnels. The strata-structure model was used to analyze the stress and deformation of the tunnel structure (Fig. 1, Fig. 2, Fig. 3). The horizontal direction of the force taken along the direction of the tunnel is

32、limited to 3 times the hole span. The vertical direction is taken upwards to the surface, and the bottom is 3 times the hole span. Element model Elasto-plastic physical tunnel lining with DP stratum material adopts elasticity The beam element simulation beam elements and solid elements are connected

33、 using a coupling equation. It can be seen from the data analysis in Table 2 that the large tunnel has a greater impact on the small tunnel during construction. If the necessary reinforcement measures are taken for the small section tunnel and the longitudinal demolition distance of the temporary su

34、pport is controlled, this scheme is beneficial and feasible.Key Construction Technologies and Corresponding MeasuresThe construction of the multi-arch tunnel section needs to be carried文檔從互聯(lián)網(wǎng)中收集，已重新修正排版，word格式支持編輯，如有幫助歡迎下 載支持。 out under strict construction organization and strong technical guarantee

35、 measures. The construction of each construction step is a key to successful construction.Pulling bolts and reinforcing boltsAfter the removal of the single middle wall, the thickness of the middle wall after the excavation is completed is 0.8m. It is very necessary to set the anchor bolt and the re

36、inforcement bolt. For the tension bolt, the length of the 22 steel reel bolt is , and the thickn ess of the middle wall is Reinforced anchor rods are installed at the inverting arch and side wall at both sides of the middle wall with a 25 hollow grouting anchor spacing ofGrouting Reinforcement in Mi

37、ddle Wall Rock PillarThe thinnest part of the rock mass in the middle wall is 0.15m. After several blasting excavation processes, the surrounding rock around the middle wall loosens its bearing capacity. Therefore, the loose surrounding rock must be grouted in the vaults, walls and inverted arches o

38、f the middle wall. The embedded 42 steel pipe slurry adopts a cement -water glass double slurry parameter of 1:1 cement slurry and 3045Be. In the two excavations, the grouting pressure of the inflow glass solution of the middle wall is 0.21.0 MPa. After the final excavation of the grouting line, a s

39、aturated grouting is performed on the sandwich wall.Differential Blasting TechnologyAll the tunnel excavations are drilled and blasted. Because the ground buildings in the downtown area of Guangzhou City are dense and the tunnel is blasted at a distance of “0”, the blasting vibration must be control

40、led within the allowable range in accordance with the blasting scheme for micro-shock blasting in the reserved smooth layer. The blasting measures taken for Grade III and Grade IV surrounding rocks in the strata of a multi-arch tunnel are as follows: (1) Blasting equipment uses emulsion explosives w

41、ith low seismic velocity. 2 Strictly control the distance between the perforation of per cycle and the distance between the peripheral blastholes of 0.4m to reduce the charge volume and control the smooth blasting effect. 3 Multi-stage detonator detonation in each blasting The non-electrical millime

42、ter detonator is used to asymmetrically detonate the network micro-vibration technology. 4Second excavation is adopted at the middle wall. 1m is reserved for the smooth surface. Grooves are arranged on the side far away from the middle wall. medicine. The use of artificial wind excavation for excava

43、tion of partially dug excavation is prohibited. Through the above-mentioned effective measures, the “0” distance excavation of the multi-arch tunnel was smoothly passed without causing damage to the 0.15-m thick middle wall during the secondary blasting of the middle wall.Assisted Scissor SupportThr

44、ough ANSYS simulation analysis In order to ensure the safety of載支持。 small-section tunnel construction, it is necessary to assist the reinforcement of the small-section tunnel to withstand the transient impact caused by blasting and the bias generated by the load release during excavation of the rock

45、 formation. The support material is welded to both ends of the grid pre-embedded steel plate with I20 steel and the spacing of the support arrangement is 0.6m, ie high strength bolts are used on each grid. The layout of the arrangement was extended to 1.2m on each side of the double arch and complet

46、ed in front of the big end of the excavation. The height and angle of the support arrangement should ensure smooth construction machinery and equipment. Through the construction proof that the setting of the support is necessary and effective, the small section tunnel converges only 5 mm after the a

47、uxiliary scissor is added.Information ConstructionIn order to ensure structural safety and construction safety, real-time monitoring measurement is carried out during the tunnel construction process. The deformation characteristics of supporting structures and surrounding strata are used to predict

48、the corresponding support structure displacements and to verify the rationality of supporting structures to provide a basis for information construction. Monitoring during construction shows that the maximum settlement of a tunnel with a small cross section is 14.6 mm. The maximum settlement of a tu

49、nnel with a文檔從互聯(lián)網(wǎng)中收集，已重新修正排版，word格式支持編輯，如有幫助歡迎下載支持。large section is 17.2 mm. The maximum convergence of the tunnel is 7.6 mm. The maximum settlement of the ground is 10 mm. The maximum settlement of the arch with a triple hole arch is 22.8 mm.中文譯文城市地下鐵道連拱隧道群施工技術(shù)研究作者 Y Cocheril摘要本文利用地鐵三號線某一工程實(shí)例對連拱隧道群

50、施工工法進(jìn)行 探討。在地鐵施工中首次提出了將連拱隧道改為單洞隧道施工技術(shù)并 對單一式中墻和分離式中墻結(jié)構(gòu)的技術(shù)方案進(jìn)行了比選得出了滿足 結(jié)構(gòu)安全、施工安全和 經(jīng)濟(jì)效益較好的技術(shù)方案可為今后類似工程 的設(shè)計(jì)和施工提供借鑒和參考 。 關(guān)鍵詞：連拱隧道群，單一式中隔墻，分離式中隔墻， 施工技術(shù)地鐵隧道由于線路設(shè)計(jì)要求產(chǎn)生多種隧道結(jié)構(gòu)形式其中由不等 跨雙連拱和三連拱隧道組成的連拱隧道段常用于正線和渡線的連接。 本文結(jié)合工程實(shí)例根據(jù)隧道所處地質(zhì)條件、工期要求通過比選提出了 可達(dá)到快速施工和節(jié)省施工成本目的的最佳施工方案。工程概況地鐵三號線體育西路站折返線為體育西路站站后折返線結(jié)構(gòu)形 式復(fù)雜在 段設(shè)置了不

51、等跨雙連拱結(jié)構(gòu)、三連拱結(jié)構(gòu)等隧道群。不等 跨連拱隧道開挖跨度為20.1m開挖高度為10.076m跨矢比為1 ： 0.5 小洞襯砌后跨度為5.2m大洞襯砌后跨度為11.4m中墻厚度為1.6m。載支持。 三連拱隧道開挖跨度為19.9m開挖高度為7.885m跨矢比為1 ： 0.1。 連拱隧道段的圍巖自上而下有:人工填土層、沖-洪積砂層、沖積-洪積 土層、河湖相沉積土層、可塑狀殘積土、硬塑-堅(jiān)硬狀殘積土、全風(fēng) 化巖層、強(qiáng)風(fēng)化巖層、中風(fēng)化層和微風(fēng)化層。隧道通過地層巖質(zhì)較為 均一強(qiáng)度較高承載能力強(qiáng)穩(wěn)定性好。隧道拱頂覆蓋層厚度為 15.518m 其中拱頂W級圍巖層厚度為雙連拱段施工方案由于連拱隧道段結(jié)構(gòu)比較

52、復(fù)雜隧道斷面變化較大施工工序繁復(fù) 施工難度高施工周期長所以選擇一個好的施工方案對優(yōu)質(zhì)高效完成 連拱隧道段的施工尤為重要。選擇施工方案時主要考慮以下幾個方 面 :1 施 工 安 全 和 結(jié) 構(gòu) 安全 2 施工難度 3 施工周期 4 經(jīng)濟(jì)效 益。本著這四條原則經(jīng)過施工方案的研究和論證選出下面兩個施工方 案進(jìn)行比較甄選。單一式中墻施工方案該方案的主要施工步驟及措施如下: 1 從右線雙連拱小洞隧道內(nèi) 向折返線側(cè)進(jìn)行臨時施工通道、雙連拱和三連拱中墻施工完成后中墻 及時支撐施工時防止偏壓。 2 中墻襯砌施工完成后按照“先小后大、 封閉成環(huán)”的原則用臺階法進(jìn)行右線施工用 CRD 工法進(jìn)行折返線大 跨度隧道施

53、工。 3 當(dāng)折返線側(cè)施工到三連拱隧道中墻后再按照右線 中墻施工 方法 進(jìn)行三連拱和雙連拱中墻施工這期間右線停止掘進(jìn) 直到中墻施工完成。 4 折返線側(cè)中墻施工完成后右線繼續(xù)往前施工。 該工法為國內(nèi)連拱隧道常規(guī)施工工法廣州地鐵、南京地鐵和北京地鐵載支持。 中均有 應(yīng)用 并能安全順利地完成隧道群的施工。但是對以往的工程 實(shí)例和施工技術(shù)的研究可以發(fā)現(xiàn)該方案還存在不足和缺陷。 1 本方 案運(yùn)用于本工程上在短短的 21.11m 的連拱隧道內(nèi)隧道的初期支護(hù) 和二次襯砌間將轉(zhuǎn)換 4 次轉(zhuǎn)換過于頻繁。 2 中墻和邊洞隧道襯砌涉 及的防水層施工、鋼筋工程、模板工程、混凝土澆注均需多次轉(zhuǎn)換施 工周期長達(dá) 2 個月。

54、 3 襯砌完成后中墻防偏壓支撐和材料設(shè)備的投 入導(dǎo)致施工成本增高經(jīng)濟(jì)效益降低。分離式中墻施工方案該方案的主要施工步驟及措施如下: 1 將不等跨雙連拱隧道改為 兩個單洞變更為分離式中墻先從右線單線隧道往前施工。 2 對三連 拱隧道先不施作中墻襯砌按單線工況通過。 3 對右線的大斷面雙連 拱隧道按照 CRD 工法側(cè)壁通過。 4 折返線側(cè)則按照右線相反的施 工順序進(jìn)行施工。 采用本方案實(shí)際就是按照兩條單線的施工方法進(jìn) 行與上一方案進(jìn)行對比后具有如下優(yōu)點(diǎn): 1 減少施工工序加快工序的 銜接轉(zhuǎn)換。 2 降低了施工難度縮短了施工周期。 3 降低了施工成本 提高了經(jīng)濟(jì)效益。 4 變單一式中墻為分離式中墻徹底地解決了連拱 隧道結(jié)構(gòu)的防水上的缺陷。 5 三連拱隧道中洞后期施工相當(dāng)于大跨 度隧道預(yù)留了核心巖體有利于兩側(cè)雙連拱隧道施工安全表。三連拱段施工方案從右線直接進(jìn)入三連