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On Construction Technology of Shallow Buried, Bias Pressure and Soft Surrounding Rock Tunnel In the construction of shallow buried, unsymmetrical and weak surrounding rock tunnels, due to improper application or treatment of construction technology, a large area of collapse is often caused, resulting in incalculable personal injury, property losses and construction delay. -
Construction Technology for Single Exit of Yangzhuang Shallow Buried Eccentric Pressure Tunnel This paper introduces in detail the one-way through construction technology for the shallow buried and unsymmetrical pressure portal of Yangzhuang Tunnel downlink of Mian Ning Expressway, and proposes that environmental protection should be paid attention to during the construction process, as well as the good results and social benefits achieved by this technology. -
[Jiangxi] Construction technology of soft surrounding rock at tunnel portal eccentric pressure section The total length of the content is 4032.3m (2027m for the left line and 2005.3m for the right line), which is a double track separated tunnel. The tunnel area is located in the denuded low mountain and hilly area, with steep mountains. The local bedrock at the portal section is exposed, which is strongly weathered conglomerate, and the upper part is Quaternary gravelly soil and gravelly soil. The longitudinal slope of the portal section is 50 ° - 60 °, and the transverse slope is single slope, -
Key points of highway tunnel construction technology Key points of highway tunnel construction technology -
Rock burst construction technology of highway tunnel Technical Scheme for Rock Burst Construction of Highway Tunnel -
Discussion on construction technology of highway tunnel Due to the convenience of work, we found three highway tunnel construction sites of national key construction projects, visited the construction site, and thought about the current construction technology and procedures -
Summary of Lipifeng Tunnel Construction Technology Lipifeng Tunnel has a total length of 5025m and a maximum buried depth of 380m. It is designed as a single hole double track tunnel. The entrance mileage is DK78+952, and the exit mileage is DK83+977. The tunnel is divided into two working faces to be constructed according to the principle of the New Austrian Tunneling Method (NATM) from the entrance and exit of the main tunnel. The tunnel entrance section is 1140.57m long at R=6000 -
Tunnel construction technology and process scheme 1. Construction of portal section and portal 1.1 The protective drainage system such as the intercepting ditch at the top of the mountain shall be completed first, and then the side and front slopes shall be excavated according to the construction drawings. Mechanical excavation is the main method of excavation, supplemented by small loose blasting when it is difficult. The slope surface shall be supported by anchor, shotcrete and hanging net while excavating. When the excavation reaches the design elevation, all slope protection work shall be completed in time. -
Analysis on the technical management of tunnel construction The construction technology management business of the project is managed by the Engineering Technology Department of the Project Department. The Engineering Technology Department implements the integration of responsibility, expertise and authority. Under the leadership of the project leader in charge of production and the chief engineer, it implements the construction technology management authority on behalf of the Project Department -
Overall construction technical scheme of a tunnel The overall construction technical scheme of a tunnel is rich and detailed, and can be downloaded for reference and study by netizens. -
Technical disclosure of tunnel blasting construction Blasting design procedure, selection of blasting materials, blasthole layout, blasting parameters -
Technical disclosure of tunnel construction in winter Definition of winter construction, overall technical scheme of winter construction, winter construction standards -
Technical disclosure of tunnel waterproof construction Waterproof grade, waterproof measures, waterproof construction process flow chart -
Technical disclosure of tunnel rail crossing pipe construction Statistical Table of Tunnel Rail Crossing Pipe Setting and Tunnel Mileage Location -
Construction technology of collapsible loess tunnel To solve the collapsibility problem of loess is the first task of building railways in western China. Collapsible loess, commonly known as macroporous soil, is a kind of yellow or brownish yellow powdery soil formed in the Quaternary period, whose particle composition is dominated by silt particles. It belongs to unsaturated and under compacted soil, which has a large void ratio and low dry density, and is the fundamental cause of loess collapsibility. -
Research and Application of Construction Technology for Karst Tunnel Through the construction of Jindong Tunnel and Qihaoling Tunnel in karst section of Chongqing Huaihua Railway, the principle of tunnel karst treatment, karst hazard assessment and treatment countermeasures are determined by comprehensive advance geological prediction and prediction, so as to reduce construction blindness and ensure the safety and stability of engineering construction and engineering structure. -
Construction technology of secondary lining of subway tunnel Combined with the specific engineering practice, this paper introduces the construction methods of the composite support of the initial support of the shotcrete anchor construction method and the permanent support of the cast-in-place reinforced concrete of the subway tunnel constructed by the mining method, expounds the specific construction. T -. T - technology and technical requirements, and puts forward some suggestions. -
Construction technology of wet shotcrete in tunnel Construction technology of wet shotcrete in tunnel -
Construction technology of tunnel fault fracture zone Dongfeng Tunnel is the fourth large tunnel on Shuohuang Railway Line. It is a double track tunnel with a total length of 3290m. The section DIK47+610-DIK48+974 at the exit end of our construction is 1364m long. Among them, the section DIK47+880-Dm48+040 passes through the fault fracture zone of Class II surrounding rock. The lithology is mainly schist, shale, sandstone with thin layer of marl -
Tunnel construction technology in coal seam gas section Tunnel construction technology in gas section of coal seam. doc, which is detailed and rich, can be downloaded by netizens. -
Overall Construction Technology of a Tunnel on Shibai Expressway According to the specific geological conditions of the project and the provisions of the Technical Code for Construction of Highway Tunnels (JTJ042-94), combined with our long-term experience in advanced geological prediction, it is proposed to use geological radar, TSP and geological inference methods for comprehensive prediction of the tunnels in this contract section. The geological radar method is mainly used for medium and long tunnels and short tunnels with simple geology and good surrounding rock. TSP is mainly used for -
Construction technology of overpass tunnel passing through civil buildings Combined with the on-site situation, this paper introduces the construction technical measures to ensure the safe use of civilian buildings and reduce the uneven settlement of civilian buildings during the construction, and introduces the construction technology of the upper and lower tunnels of the overpass tunnel, which can safely pass through the ground buildings through such measures as advance small conduit, radial grouting, grouting reinforcement of the face, replacement, and support removal, so as to provide reference and reference for similar projects in the future. -
Summary of construction technology of Santaiding Tunnel Santaiding Tunnel is the first tunnel constructed by our company and also the first tunnel constructed according to the "double standard" management requirements. The engineering geological conditions of this tunnel are complex, the construction period is tight, the task is heavy, and the branch company lacks experience in similar engineering construction management. During the construction process, the construction principle of "pipe ahead, short footage, strong support, early closure, and frequent measurement" is adhered to to ensure the safety and order of tunnel construction. this paper -
Technical disclosure of tunnel shotcrete construction Main design parameters of shotcrete for Grade IV surrounding rock (general section): C25 mesh shotcrete fiber concrete is used for Grade IV surrounding rock, and the shotcrete thickness is 18cm. -
Technical disclosure of tunnel concrete curing construction The arrangement and spacing of shot holes The shot holes should be arranged at equal intervals starting from the heading face back X3=3~5m, and the distance between the shot holes is 2m. When it is difficult to make holes, they can be staggered from top to bottom, left to right, but should be within 10cm. -
Technical disclosure of waterproof construction of cable tunnel When the power supply is cut off, the operating handle shall be locked or tagged. Insulating gloves shall be worn during the electrical test, electroscope shall be used according to the voltage level, and the electrical test shall be carried out for each phase or each phase on both sides of the equipment. After verifying that there is no power in the equipment or circuit, the maintenance equipment or circuit shall be short circuited and grounded. The installation of grounding wire should be carried out by two people. The grounding terminal should be connected first and then the conductor terminal. The removal sequence is reverse -
Technical management of tunnel construction in a certain area The project chief engineer plays a very important role in project management, and his responsibility is also very important. He is a key position in project management. -
Technical code for construction of highway tunnels This data is: Technical Specification for Construction of Highway Tunnel: Technical Specification for Construction of Highway Tunnel, which is detailed and can be used for reference. -
Summary of construction technology of double arch tunnel This data is a summary of the construction technology of double arch tunnel. The northeast side is close to the tail of Laowuxia Reservoir, and the southwest side has Baiyangchong Small Reservoir. The ground elevation of the tunnel crossing is between 98 and 166 meters, the relative height difference is more than 65 meters, and the north side hill top elevation is 192.70 meters. The mountain vegetation is developed, and the crossing and intervisibility conditions are poor. The content is detailed and worth downloading. -
Technical disclosure of tunnel construction (Level I EM) Project overview, project management objectives, main construction processes and schemes -
Discussion on construction technology of large section loess tunnel Combined with the specific situation of Hejiazhuang tunnel construction, this paper expounds the construction technology of seven step flow process method for excavating loess tunnel with reserved core soil in arc heading, analyzes the causes of surface cracks in tunnel construction, and puts forward corresponding treatment measures for reference by relevant personnel. -
Discussion on construction technology of expressway tunnel At present, tunnel construction is three processes; This paper introduces the construction of tunnel engineering in the second process, improves the traditional technology with scientific and technological progress, and strives to reduce the project cost; Improve quality and work efficiency. -
Study on Construction Technology of Super shallow Buried Tunnel Study on Construction Technology of Super shallow Buried Tunnel -
Construction technology of fault fracture zone in Dongfeng tunnel This paper describes in detail the construction technology of small pipe shed pre support and anchor shotcrete initial support in the fault fracture zone of Dongfeng Tunnel on Shuohuang Railway, and briefly introduces the excavation method. -
Tunnel safety organization construction technology Safe construction technologies such as tunnel open cut excavation, slope, front slope, rock drilling and blasting, excavation, slag transport, primary support, secondary lining, etc. -
Overall Construction Technical Scheme of a Tunnel on Shibai Expressway This area belongs to the northern subtropical continental monsoon climate. The mountain area is foggy and rainy, with an annual average temperature of 15.3 ℃, the lowest temperature in winter of - 13.5 ℃, and the highest temperature in summer of 40 ℃. The frost free period is 224~255 days, with an average annual precipitation of more than 800 mm. The rainy season is from June to August. -
Construction Technology of the Crossing Tunnel in Dongjingting District This document is about the construction technology of the crossover tunnel in Dongjingting District, and its contents are for reference only -
Tunnel construction methods and key construction technologies 1、 Tunnel portal construction technology II. Tunnel entry construction method III. Open cut tunnel IV. Tunnel construction method and key construction technology V. Several construction equipment -
Construction Technology of a Tunnel on Shanghai Chengdu West Expressway The entrance of the left tunnel is located on the curve of R=1000m (left deviation), and the exit is located on the curve of R=1000m (right deviation). A one-way slope with a longitudinal gradient of 1.849%. The entrance of the right tunnel is located on the curve of R=850m (left deviation), and the exit is located on the curve of R=1000m (right deviation), with a longitudinal gradient of 1.891%. -
Construction Technology of Shallow Buried Tunnel with Subsurface Excavation_ppt The contents of shallow buried tunnel construction technique_ppt are detailed and can be used for reference
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one Construction technology of fast tunnel -
two Rapid tunnel construction technology -
three Tunnel blasting construction technology -
four Technical Details for Tunnel Construction -
five Tunnel shield construction technology -
six Tunnel construction technical accident -
seven Construction Technology of Dongshan Tunnel -
eight Technical data of tunnel construction