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Newly developed pressure adaptable concrete lining for

Newly developed pressure adaptable concrete lining for

Newly developed pressure adaptable concrete lining for ...

Nov 01, 2020  A pressure adaptable concrete lining (PACL) for hydraulic tunnels with high water pressure and high groundwater pressure was developed based on the thick-walled cylinder theory. One of the functions of the designed lining structure is that it can transfer the tunnel water pressure to the lining outer wall such that the lining bears compressive ...

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Tunnelling and Underground Space Technology Vol 105 ...

select article Newly developed pressure adaptable concrete lining for high pressure hydraulic tunnels. ... Research article Full text access Newly developed pressure adaptable concrete lining for high pressure hydraulic tunnels. Xiaogang Wang, Lipeng

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中国水利水电科学研究院 - IWHR

Newly developed pressure adaptable concrete lining for high pressure hydraulic tunnels 汪小刚 Tunnelling and Underground Space Technology SCI 2020 Evaluation of behavior and cracking potential of early-age cementitious systems using uniaxial restr... 辛建达

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中国水利水电科学研究院 - IWHR

Newly developed pressure adaptable concrete lining for high pressure hydraulic tunnels. 汪小刚. 中国水利水电科学研究院. Tunnelling and Underground Space Technology. 2020年08月. SCI. 2区. 岩土所. Microbial-Induced Carbonate Precipitation for Strengthening Soft Clay. 肖建章. 流域水循环模拟与调控国

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Design of reinforced concrete lining of the tunnel pressure

Goal: I am working on the design of reinforced concrete lining of the tunnel pressure. The results of structural non-linear analysis indicated that water losses from tunnel remain at a lower ...

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Tunnelling and Underground Space Technology Vol 105 ...

select article Newly developed pressure adaptable concrete lining for high pressure hydraulic tunnels. ... Research article Full text access Newly developed pressure adaptable concrete lining for high pressure hydraulic tunnels. Xiaogang Wang, Lipeng

get price

中国水利水电科学研究院 - IWHR

Newly developed pressure adaptable concrete lining for high pressure hydraulic tunnels; 汪小刚; Tunnelling and Underground Space Technology; SCI; 2020; Evaluation of behavior and cracking potential of early-age cementitious systems using uniaxial restr... 辛建

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中国水利水电科学研究院 - IWHR

Newly developed pressure adaptable concrete lining for high pressure hydraulic tunnels. 汪小刚. 中国水利水电科学研究院. Tunnelling and Underground Space Technology. 2020年08月. SCI. 2区. 岩土所. Microbial-Induced Carbonate Precipitation for Strengthening Soft Clay. 肖建章. 流域水循环模拟与调控国

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Development of a prestressed and precast concrete ...

Apr 01, 2003  It is thus suitable for single-pass structure without secondary concrete lining. 1.2.5. Resistance against internal pressureFor tunnels subjected to high internal water pressure, concrete can be held in a fully compressed state by introducing prestress, ensuring stability and water-tightness. 2. Outline of experiments on PPC segmental lining2.1.

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History of the sprayed concrete lining method—part II ...

Feb 01, 2003  The introduction of a shotcreting machine by the Swiss engineer G. Senn in 1950 marks a new era for the sprayed concrete lining method. This equipment was designed for a maximum aggregate size of 25 mm, and it achieved an efficiency of 3 m3 /h. It also introduced other major operational improvements ( Teichert, 1979 ).

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Design of Segmental Tunnel Linings for Serviceability ...

Tail Skin Grouting Pressure s g = 225 kPa s g = 264.5 kPa s g = 245 kPa 114 kN.m Bending 1573 kN Moments Axial Forces • Simulated in 2D by a solid ring • Grout pressure at crown is slightly higher than groundwater pressure • Invert grout pressure is calculated from equilibrium b/w grout pressure, self-weight and shear stresses of semi ...

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Intro to Sprayed Concrete

be formed from concrete. If there is a drawback to the use of concrete it is the need for formwork or shutters necessary to create a mould for the concrete whilst in its fluid state. Dr Akeley needed to develop a device to enable the mortar mixture to be sprayed. After experimentation he developed a single chamber pressure vessel which

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Design of unlined and lined pressure tunnels - ScienceDirect

Jan 01, 1989  The paper covers the engineering requirements for designing a safe and economical pressure tunnel. Design requirements and criteria set out include the geological aspects of positioning and alignment; protection against failure by hydraulic jacking; determination of unlined versus lining requirements; selection of temporary and final linings utilizing rockbolts, shotcrete, or concrete; design ...

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Guidelines for the design of shield tunnel lining ...

Jul 01, 2000  The loads acting on the lining include earth pressure and water pressure, dead load, reaction, surcharge and thrust force of shield jacks, etc. ... Materials These guidelines are intended for the reinforced concrete segment as the material of the initial lining and for cast-in- place concrete as the material of the secondary lining ...

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Self Healing Concrete Research Papers - Academia

It initiates corrosion, further reducing the life of the concrete. So there was a requirement to develop an intrinsic bio-material, a self-repairing technique which can rectify the cracks and fissures developed in concrete. Bio-concrete is a material which can successfully rectify cracks in concrete.

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Sliplining process for HDPE PE100 pipe

SLIPLINING - TECHNIQUE. Slip-lining is perhaps the oldest of all trenchless techniques.It involves the insertion of a new PE100 liner pipe of standard diameter and SDR into an existing pipe. Under the right conditions, slip lining is also the simplest trenchless technique.A new pipe with an outside dimension smaller than the inside dimension of the host pipe is either pulled or pushed into the ...

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VIBRAFLEX - Concrete Construction Products Manufacturer

DESCRIPTION. VIBRAFLEX bridge deck protection course is a multi-ply, semi-rigid asphalt panel composed of a mineral-fortified asphalt core between one liner of asphalt-saturated felt and one layer of fiberglass. One liner is weather-coated and has a polyethylene film facing. It may be used in conjunction with most types of built-up dampproofing ...

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Development and application of the integrated sealant test ...

Mar 01, 2017  A newly developed test apparatus allows measuring the water leakage pressure of different types of segmental joints (i.e., longitudinal joint, circumferential joint, and T-joint) in practical tunnel lining structures, subjected to various joint opening and offset conditions.

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Hydro-mechanical interaction analysis of high pressure ...

Abstract The reinforced concrete lining of hydraulic tunnel cracks under high internal water pressure and the high pressure water will leak off from the crack surface, which is a typical hydro-mechanical interaction problem. Unfortunately, the analytical and numerical methods used in current engineering practice for simulating the hydro-mechanical interaction of the lining and surrounding rock ...

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History of the sprayed concrete lining method—part II ...

Feb 01, 2003  The introduction of a shotcreting machine by the Swiss engineer G. Senn in 1950 marks a new era for the sprayed concrete lining method. This equipment was designed for a maximum aggregate size of 25 mm, and it achieved an efficiency of 3 m3 /h. It also introduced other major operational improvements ( Teichert, 1979 ).

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New watertight seals for high pressure potable water pipe ...

Jul 05, 2018  Specifically developed for pipe rehabilitation, the two new seals provide a watertight seal for most types of pipe including steel, cast iron, concrete and plastic. The lead-free, NSF approved I-Lock-P™ Mechanical Seal and L-Lock-P™ Liner End Seal, are easily installed using a high force hydraulic expansion tool and are available in ...

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Intro to Sprayed Concrete

be formed from concrete. If there is a drawback to the use of concrete it is the need for formwork or shutters necessary to create a mould for the concrete whilst in its fluid state. Dr Akeley needed to develop a device to enable the mortar mixture to be sprayed. After experimentation he developed a single chamber pressure vessel which

get price

Design and Construction of Deep Shaft Concrete Linings in ...

Jan 01, 2019  High strength concrete mixes were developed to enable economic linings to reach greater depths and these will be detailed. The ground conditions to sink through in the UK consist of predominantly competent (self-standing when excavated) rock, which can be water bearing, and hence a hydrostatic pressure resisting lining is required.

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Guidelines for the design of shield tunnel lining ...

Jul 01, 2000  The loads acting on the lining include earth pressure and water pressure, dead load, reaction, surcharge and thrust force of shield jacks, etc. ... Materials These guidelines are intended for the reinforced concrete segment as the material of the initial lining and for cast-in- place concrete as the material of the secondary lining ...

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Concrete Cloth - Its Uses and Application in Civil Engineering

Adaptable-Concrete Cloth is currently supplied on 1.2 m (4 ft) wide rolls but can be manufactured with a roll width of up to 5 m (16.4 ft). The cloth can be produced in a range of thicknesses from 5 to 20 mm (0.2 to 0.8 in.); and ; Durable-Concrete Cloth is chemically resistant and will not degrade in ultraviolet light. Environmentally Friendly

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Characterizing Excavation Damaged Zone and Stability of ...

Sep 23, 2012  Figure 12a shows how pressure within the concrete lining increases with elapsed time. Cavern pressure (P1) fluctuated between the designed pressure range of 2–5 MPa, with the pressure in the concrete lining (P2) gradually increasing with time owing to pressurized air penetration through the partially leaky lining.

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Assessment of Leak Before Break of a Newly Developed Type ...

Nov 15, 2019  A Type 2 pressure vessel for hydrogen storage, which is made of a combination of a seamless linepipe steel liner and carbon fiber reinforced plastic (CFRP), was developed for hydrogen refueling stations operated at over 70 MPa hydrogen. This newly developed vessel was designed based on various standards such as ASME Sec. VIII Div. 3.

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Tunnel Construction Overview

concrete segments • EPB machines use the excavated material to balance the earth pressure at the tunnel face. • In conditions with higher pressure due to very soft ground / high water pressure, Slurry Shield machines are utilised. • Open face TBMs (Main Beam machines) can only be utilised if the

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Self Healing Concrete Research Papers - Academia

It initiates corrosion, further reducing the life of the concrete. So there was a requirement to develop an intrinsic bio-material, a self-repairing technique which can rectify the cracks and fissures developed in concrete. Bio-concrete is a material which can successfully rectify cracks in concrete.

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Liner Concrete Machinery Company Tractor Construction ...

Liner Concrete Machinery Company Ltd. of Park Road, Gateshead, Tyne and Wear, England, NE8 3HR. The company was owned by the Harrison Family. [clarification needed] The company manufactured a range of construction site machinery.An notable innovation was the Liner Giraffe the forerunner of the modern telescopic handler in 1974. A new company Multi Quick Engineering now builds some of the Liner ...

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Steel–Concrete Composite Pressure Vessels for Hydrogen ...

When an internal pressure, P i, is applied at the inside surface of a steel–concrete composite shell, an interface pressure, P f, is developed at the interface between the outside surface of the steel cylinder and the inside surface of the concrete cylinder. The magnitude of this interface pressure is determined by the following compatibility ...

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(PPT) CONCRETE CLOTH VAKATI CHARAN TEJA - Academia

CONCRETE CLOTH. Vakati Charan Teja. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 30 Full PDFs related to this paper. Read Paper.

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Pond Construction with Concrete - POND Trade Magazine

Pond Construction with Concrete. 4´ deep koi pond with 4˝ bottom drain, 2˝ fiber reinforced concrete sprayed over 45mil EPDM liner. Concrete and mortar have been favored by pond and fountain builders since the Roman Empire, and the formula has changed little in the past 2000 years. Limestone and clay are mixed, heated and ground to the silky ...

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