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 Posted: Fri 10:17, 01 Apr 2011 Post subject: Special section of main highway geological disaste |
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Special section of main highway geological disaster treatment engineering design and construction
(4) filling cracks in perfect top of the hill slope drainage system. 2.2 Design Notes (1) cleaning up the slope on the right on top of surface dust and dangerous boulder stone, both sides of the wings and chips and so on. (2) between two boulders of concrete filling cracks in stone-chip on (-r '2007 established process and t s 21 4 601 Boulder Grouting Sealing cracks around them. (3) half-hanging slope The two boulders support the entire mountain peak, can not be used blasting clear, therefore, should remain as two boulders can not blast cleaning, the use of fixed braces beam support program: a large boulder set three 1.0m × 1. 5m inclined beams, small boulders set two 1.0m × 1.5m inclined beams. foundation beam leg used to expand the basis of 2.0m × 2.0m concrete foundation stone tablets inclined capitals support, the upper and boulders to form a 32-bar anchor a fixed rigid body, set up a small boulder hit the bottom of duct grouting. (4) hanging on the supporting beams Spraying thickness Backfill 10cm. (5) foot of the slope set of retaining walls, planting the inside retaining wall climbers and shrubs. (6) top of the hill crack filling, drainage ditches to set ecological. 3 3.1 Construction of measures to clean up the right side of the slope surface dust and clean up dangerous rock slopes, easy to swap block of stone used in all manual removal. 3. 2 Grouting of cracks between two boulders Caiyong grouting, concrete stone-chip surface closed to prevent rainwater infiltration two boulders footing. 3.3 Sealing of the exposed concrete of two large boulders at the base legs play set 42 × 4 small pipe, small pipe length of 4.5m, spacing 50cm, plum-shaped hole small pipe laying, grouting Caiyong M30 slurry, grouting pressure 0.5 ~ 0.8MPa, interpolation of 25 bars, on the basis foot boulder at the base of small catheters and leg used C3o concrete Sealing. 3.4 bracing beam construction (1) expand the basis of: excavation before excavation survey and setting out to locate and mark lines in support of a large boulder marked beam supporting the top position; according to the design elevation of excavation to the design elevation, the use of the pouring of concrete rubble foundation. (2) banding based steel and steel support beams, while the bottom die and set up on both sides of the template, position the four corners of the support beam of the setting 1 root angle of 10 × 10, with the support beam length and long intervals between four 2m set an angle stiffener beams, welding firm; contacts with large boulders located at the anchor hole to play, deep less than 50cm, into 32 anchor tendons, the use of mortar anchor,[link widoczny dla zalogowanych], and with the support beam welded steel firm, in line with the bridge welding of steel banding. (3) Construction of reinforced concrete supporting beams, each fitted with a roof construction of a model, not to prevent compacting concrete vibrators. concrete slump down the degree to control water-cement ratio 1:0.45, vibrator to be used with plug-in vibrators vibrators closed flat light compaction, Honeycomb is strictly prohibited. Each process and building support 602I'r '2007 Vol.21 No. 4 after going to double-check beam construction and effect of construction quality, attention to every aspect of quality control. (4) After the concrete wrapped in plastic film, fabric maintenance outsourcing Yuhua 4 layers. 3.5 Backfill Spraying soil until the end of all the support beam construction, improve the lower retaining wall, retaining wall, backfill between the support beam crushed gravel, stratified to ensure that the backfill compaction and stability; in the support beam hung sash set within the geotechnical Spraying thick mesh grille 10cm, planted at the back wall climbers, shrubs planted interval, consistent with the surrounding landscape. 3.6 The drainage system of the applications and improve the top of the hill crest ecological drainage ditches, slope and slope slot jet foot drainage ditch. the construction is completed, as shown in Figure 2. circle the picture after 2 Shi T 4 Conclusion of the section works with a certain particularity, broaden horizons. support beam construction technique is simple, economical and reasonable cost, resistance effect Obviously, after the treatment beautification, greening and have some appreciation of the post, added the section of road travel a beautiful landscape, but also for other special offers reference works. (
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