Contact Us

C o n t a c t U s

Development of tunneling influence zones for adjacent pile

2013-2-1  Tunneling-induced effects on nearby pile foundations are complex and depend on the relative pile-tunnel position and clearance, ground loss due to tunneling, subjected working load, cover-to-diameter ratio, and the pile and tunnel sizes. The tunnel excavation activities cause some level degree of impact on nearby piles.

(PDF) Ground movement and tunnel stability when tunneling

Tunnelling in soft soils may cause ground movements and damage to adjacent buildings and overlying facilities. Ground movements around a tunnel before and after collapse

Tunnels and underground excavations Tunneling techniques

2021-5-23  Under most conditions, tunneling causes a transfer of the ground load by arching to sides of the opening, termed the ground-arch effect (Figure 1, top). At the heading the effect is three-dimensional, locally creating a ground dome in which the load

GROUND MOVEMENT AND TUNNEL STABILITY WHEN

ground loss caused by overcutting, due to (1) the dif- ference between the diameter of tunnel machines and that of the lining; (2) alignment problems encountered

Product Information Tunneling Excavator

2021-2-28  D Counterweight ground clearance 1,235/ 4' 1" E Rear-end length 1,975/ 6' 6" G Wheelbase 4,108/ 13' 6" H Undercarriage length 5,100/ 16' 9" H1 Undercarriage length with blade 5,750/ 18' 10" I Undercarriage ground clearance 565/ 1' 10" J Track height 1,125/ 3' 8" K Track gauge 2,390/ 7' 10" L Track pad width 500 / 20" 600/ 24" M Width over tracks 3,000 / 9' 10" 3,000/ 9' 10"

DT1331i TUNNELING DRILL TON Mining and Rock

Ground clearance 400 mm Diesel engine MB OM904LA, 170 kW, Tier 3, Stage IIIA Transmission Hydrodynamic, Spicer HR32 000 Axles Dana Spicer 43R (front) / 213 (rear) Tires 14.00-24 28RL Service brakes Hydraulically operated wet disc brakes Parking / emergency brakes SAHR type, fail safe wet disc brakes Fuel tank 150 liters Tramming speed 15 km/h (Horizontal)

DT621 TUNNELING DRILLS TON Mining and Rock

Ground clearance 320 mm Diesel engine MB OM904LA, 110 kW, Tier 3, Stage IIIA Exhaust catalyzer Standard Transmission Hydrodynamic, Spicer T20 000 Axles Spicer Tires 12.00-20 Service brakes SAHR type, fail save wet disc brakes Parking and emergency brakes SAHR type, fail save wet disc brakes Tramming speed 16 km/h (Horizontal) 6 km/h (14%=1:7=8°)

Marine and Ground Mine clearance Drafinsub

Marine and Ground Mine clearance. Drafinsub is specialized in the mine clearance field, for both ground and marine ordnance, and operates with the authorization of the Ministero della Difesa and of the various certifications and the respective bodies of competence. A wide range of action that includes inland waters such as canals, rivers and lakes.

Completion of World's Largest Soft-Ground Tunnel Bore

2021-4-29  alternative, the designers soon realized that full-face tunneling for an excavation opening large enough to accommodate the 63.5-ft inside clearance requirement, if feasible at all, would incur serious risks of excessive disturbance in the form of landslides and ground

Tunnel Construction: A Summary of Techniques and Hazards

2013-3-8  soft ground tunnels This category includes all tunnels built in soft, plastic or non-cohesive soils, such as silt or clay, where water may or may not be a problem. Soft ground generally can be readily excavated by spade, pick or shovel, although most soft ground tunneling today is done by means of shields in free or compressed air and other mechanized methods.

(PDF) Ground movement and tunnel stability when tunneling

Tunneling may cause ground movements and damage to adjacent buildings and overlying facilities. In this study, the failure mechanism and ground movement behavior around tunnels embedded in sandy

26. Tunnel Design Criteria. WSSC Water

2021-3-2  Soft Ground Tunneling Methods. 1) Bore and jack. A method of installing a casing by means of cutting, hand mining or boring an Vertical clearance. Maintain a minimum of two (2) foot clearance between tunnel and other utility lines. The actual location and elevation of

DT621 TUNNELING DRILLS

2019-3-15  Ground clearance 320 mm Diesel engine MB OM904LA, 110 kW, Tier 3, Stage IIIA Exhaust catalyzer Standard Transmission Hydrodynamic, Spicer T20 000 Axles Spicer Tires 12.00-20 Service brakes SAHR type, fail save wet disc brakes Parking and emergency brakes SAHR type, fail save wet disc brakes Tramming speed 16 km/h (Horizontal) 6 km/h (14%=1:7=8°)

DT1132i TUNNELING DRILL TON Group

Ground clearance 400 mm Diesel engine QSB6.7, 164 kW, Tier 3, Stage III Transmission Hydrodynamic, Spicer HR32 000 Axles Dana Spicer 43R (front) / 213 (rear) Tires 4 x 14.00-24 28RL (front) 2 x 14.00-24 28RL (rear) Service brakes Hydraulically operated wet disc brakes Parking / emergency brakes SAHR type, fail safe wet disc brakes Fuel tank 150

DT821 TUNNELING DRILL

2019-3-15  Ground clearance 400 mm Diesel engine MB OM904LA, 110 kW, Tier 3, Stage IIIA Transmission Hydrodynamic, Spicer T20 000 Axles Dana Spicer 113 (front) / 123 (rear) Tires 14.00-24 PR28 Service brakes Hydraulically applied wet disc brakes Parking / emergency brakes SAHR type, fail safe wet disc brakes Fuel tank 150 liters Tramming speed Horizontal

Completion of World's Largest Soft-Ground Tunnel Bore

2021-4-29  alternative, the designers soon realized that full-face tunneling for an excavation opening large enough to accommodate the 63.5-ft inside clearance requirement, if feasible at all, would incur serious risks of excessive disturbance in the form of landslides and ground

SPECIFICATIONS & GUIDELINES California

2020-9-25  Generally, when tunneling in good ground, tunnels with a diameter of less than eight-feet (< 8’) and less than three-hundred feet to four-hundred feet (300’ to 400’) in length may be holedthrough (excavated • All equipment shall maintain a minimum clearance of twenty-five feet (25’) from opening.

Marine and Ground Mine clearance Drafinsub

Drafinsub is specialized in the mine clearance field, for both ground and marine ordnance, and operates with the authorization of the Ministero della Difesa and of the various certifications and the respective bodies of competence.. A wide range of action that includes inland waters such as canals, rivers and lakes. Activities and methodologies. Surface Remediation (-1.2 m depth/below the sea bed)

The mechanism of hysteretic ground settlement caused by

2017-9-18  Shield is used more and more widely, such as coal mine roadway, hydropower tunnel, traffic tunnel and so on. But Tunneling with a tunnel boring machine (TBM) may cause inevitable ground subsidence. Though over the world numerous researches have been conducted for surface settlement induced by TBM in soft ground, the researches of surface settlement induced by TBM in a sandy

How To Dig A Tunnel

2021-5-19  As you might expect, microtunnellers must be controlled from above ground, usually from a cabin positioned close to the tunnel entrance. Either way, driving a tunneling machine involves a lot of

26. Tunnel Design Criteria. WSSC Water

2021-3-2  Soft Ground Tunneling Methods. 1) Bore and jack. A method of installing a casing by means of cutting, hand mining or boring an Vertical clearance. Maintain a minimum of two (2) foot clearance between tunnel and other utility lines. The actual location and elevation of

DT1132i TUNNELING DRILL TON Group

Ground clearance 400 mm Diesel engine QSB6.7, 164 kW, Tier 3, Stage III Transmission Hydrodynamic, Spicer HR32 000 Axles Dana Spicer 43R (front) / 213 (rear) Tires 4 x 14.00-24 28RL (front) 2 x 14.00-24 28RL (rear) Service brakes Hydraulically operated wet disc brakes Parking / emergency brakes SAHR type, fail safe wet disc brakes Fuel tank 150

Tunneling & Underground Engineering Services Shannon

Tunneling / Underground Innovative tunneling solutions to fit specific challenges Our excellent reputation in tunnel design is earned through experience, including the world’s largest diameter soft-ground tunnel; the world’s first and only vertical, continuously spiral-lined

SPECIFICATIONS & GUIDELINES California

2020-9-25  Generally, when tunneling in good ground, tunnels with a diameter of less than eight-feet (< 8’) and less than three-hundred feet to four-hundred feet (300’ to 400’) in length may be holedthrough (excavated • All equipment shall maintain a minimum clearance of twenty-five feet (25’) from opening.

Marine and Ground Mine clearance Drafinsub

Drafinsub is specialized in the mine clearance field, for both ground and marine ordnance, and operates with the authorization of the Ministero della Difesa and of the various certifications and the respective bodies of competence.. A wide range of action that includes inland waters such as canals, rivers and lakes. Activities and methodologies. Surface Remediation (-1.2 m depth/below the sea bed)

Completion of World's Largest Soft-Ground Tunnel Bore

2021-4-29  alternative, the designers soon realized that full-face tunneling for an excavation opening large enough to accommodate the 63.5-ft inside clearance requirement, if feasible at all, would incur serious risks of excessive disturbance in the form of landslides and ground

How To Dig A Tunnel

2021-5-19  As you might expect, microtunnellers must be controlled from above ground, usually from a cabin positioned close to the tunnel entrance. Either way, driving a tunneling machine involves a lot of

Excavation & Tunneling Conference 2021

2021-4-30  The paper analyzes tunneling records from completed soft ground tunnels to determine a relation between ground conditions, tunnel cover, TBM cutters maintenance and TBM advance rates. The records are discussed to draw several mitigation measures to be adopted during tunnelling, to reduce risks of settlements, over excavation or sinkholes.

双孔隧道中后掘进盾构对地表沉降的影响 gljtkj

2019-10-12  Abstract: Due to the limit urban underground space, the clearance of the urban metro twin tunnel is small. The subsequent shield tunneling will cause ground secondary disturbance and lead to additional ground deformation, which may threat the safety of

SELECTION OF CONSTRUCTION METHODS IN ROCK

2017-12-11  Special attention has to be paid to the treatment and discharge system of ground/mountain water encountered during tunneling. For tunnels with shallow cover underneath built-up areas noise, vibrations and settlements could be affected by each construction method in a