GEOHAZARD - FOLLOW US

语言
中文zh
美国
我的布鲁克

登记处

还没有账户,需要注册吗?

作为注册的myGeobrugg用户,您可以扩展访问下载,我们的尺寸标注工具和我们的活动。

现在注册
A BRUGG GROUP COMPANY
美国

West St Leonards

St Vincents Rd, TN38 0AB, Saint Leonards-On-Sea, 英国
2020
客户
承包商
防护对象
Railway, Building, Infrastructure
腐蚀保护
GEOBRUGG SUPERCOATING®
稳定的地区
6000 m²
边坡高度
32 m
边坡坡度从
35 ° - 45 °
绿化
Yes
防腐蚀垫
Yes
博览会
North-West
情况

A landslip in 2016 left a large back scar on the railway cutting adjacent to property boundaries. The over steepened slope needed to be stabilised to protect the rail line and also protect the gardens and boundaries of adjacent properties. Continued weathering of this slope has created a steeper and unsafe slope angle.

Prior to the failure, the slopes were heavily vegetated with mature tree cover. These large trees, although helping to stabilise the local soil, create big issues on a steep slope in adverse weather conditions and high winds. Tilt meters have been installed for the past four years to monitor the slope condition. 

地質學

The boreholes drilled at ground investigate pre-tender stage showed the ground being Wadhurst Clay, primarily clays and extremely weak mudstone with some weak sandstone also shown, leading the design to be produced for self-drilling soil nails. However, from trials (both scheduled and additional), we found much harder and prominent ground encountered at all depths, which was likely missed at ground investigation stage due to heavy faulting through Bo Peep Tunnel at the eastern extremity of the site.

The major fault through the tunnel is documented in a paper written about the reconstruction of the tunnel following partial collapse due to groundwater ingress, associated with the faulting. Following extensive devegetation of the slope, extremely hard limestone can be seen outcropping at one location on the site, suspected to be the hard band encountered at varying depths across the slope.

描述

Engineers Tony Gee and Partners set about designing a scheme for the full slope length. Due to the limited access at the crest, raised trunking, cable routes, signals at the base of the slope, and requirements to keep the Tonbridge to Hastings rail line open. A soil nailing stabilisation was chosen. The use of on slope drill rigs (skid rigs) attached to crest mounted anchors allowed for the installation of soil nails in a grid pattern over the full slope height and length.

The Works undertaken by BAM Ritchies involved drilling of just over 1400 soil nails of varying lengths (from 1.5 m to 9.0 m), with primary lengths being 7.0 m and 9.0 m, specifically in the area of the previous landslip.

Soil nails consist of 25 mm dia. solid bar, upper 2 m of tendon galvanised. Soil nails were drilled using 3 Terrapin rigs, winched across the face using bar anchors on the crest of the slope. Air flush was supplied by compressors located on the crest, with drilling methodology changing from DTH to drag bit, highly dependent on ground conditions encountered. All works were undertaken using rope access techniques with no impact on the operational running of the railway.

Following drilling, mesh installation consisted of laying just over 6000 m² of TECCO® GREEN G65/3 over the entirety of the slope face, with extremely tight access points and areas with no crest line limiting the drop lengths possible to install in one go. Only access points at either end of the 220 m long cutting, with a middle access point allowed to be used as minimally as possible due to it being a residents' driveway. Mesh was then finished with TECCO® P33/40 spike plates on each soil nail, a domed nut, and perimeter cable.

本地联系方式

Kevin H. Coyle
Kevin H. Coyle
Regional Manager Northeast
自然災害防護
Geobrugg North America, LLC
3 Beaudet Terr
Columbia CT 06237 / 美国
Phone +1 860 377 3230

联系方式

Saleh Feidi
Saleh Feidi
Regional Manager California
自然災害防護
Geobrugg North America, LLC
8921 Emperor Ave.
San Gabriel, California 91775 / 美国
Phone +1 909 706 8964

联系方式

John Kalejta
John Kalejta
Regional Manager Central US
自然災害防護
Geobrugg North America, LLC
3215 67th Avenue Pl
Greeley CO 80634 / 美国
Phone +1 505 220 1404

联系方式

Bob Lyne
Bob Lyne
Regional Manager Southeast
自然災害防護
Geobrugg North America, LLC
8004 Windspray Drive
Summerfield NC 27358 / 美国
Phone +1 336 337 0945

联系方式

Pierce Runnels, Civil Engineer
Pierce Runnels, Civil Engineer
General Manager Geobrugg North America
自然災害防護
Geobrugg North America, LLC
22 Centro Algodones
Phone +1 505 771 4080
手机 +1 505 400 0796

联系方式

Tim Shevlin
Tim Shevlin
Sales Director
自然災害防護
Geobrugg North America, LLC
4676 Commercial St. SE, PMB 174
Salem OR 97302 / 美国
Phone +1 503 423 7258

联系方式