04 ex4 lrb08 report e

DA NANG - QUANG NGAI EXPRESSWAY CONSTRUCTION PROJECT GENERAL REPORT BRIDGE – LRB08 : Clayey sand-Silty sand mixed - Overall bridge width: B = 25.5m LRB08 bridge belongs to Da Nang - Quang gravel Greenish grey, whitish grey, brownish - Traffic load: HL-93 conform to bridge Ngai expressway construction project, crosses yellow Medium dense (SC-SM) GENERAL INTRODUCTION over Ly Ly river Bridge - station is - NATURAL CONDITIONS 2.1 Topo and natural feature - seasons in year Rain season start from - season start from February to August with - report Signs and characteristic stratum are as 2.3 Hydrographical feature 2.3.1 Design flood frequence - : Poorly gradede gravel Brown brownish yellow Layer 1b : Poorly gradede sand Yellowish - Layer 2b : Low plasticity clay Brownish grey, - grey, : Clayey-silty sand Yellowish 4.1 Yellowish grey, brownish yellow, greenish grey Very stiff (CL) Layer 4a : Low plasticity clay mixed gravel Whitish grey, brownish yellow, yellowish grey Hard.(CL), (extremely weathered granite - BRIDGE STRUCTURES on express 6@33m way Straight On plan, Superstructure Using prestressing concrete structure I Deck lab is 20cm of thickness, Water proofing is 4mm of thickness, asphalt concrete surface is 50mm of thickness and rough asphalt course is 30mm of thickness 4.2 - Applied standard Specification and Substructure Abutments: Abutments are RC structure Bored piles foundations, bored piles 1.2m diameter for each abutment - project Piers: Piers are RC structure Pier caps are PC structure Bored piles foundations, Technical specification Permanent reinforcement 1.2m diameter construction bridge with concrete (RC) and prestressing concrete (PC) 4.3 Other structures Bearings: materials shall be conformed to 22TCN272-05 Expansion joint: recommendations Bridge length between end of abutment arrangement: Bearing accordance section consists separated bridges, - Following approved Frame of standards for this - Temperature range: +10 C  +47 C Span - tooth” expansion joint must be installed in girder with 6@33m span length Overall code 3.2 bridge width B = 25,5m = +17,73m out before using Using steel expansion joint type “saw Annual average humidity: H = 80% span length SPECIFICATION : Low plasticity clay mixed gravel and Ly Ly river Bridge uses I girder with 33m SCALE AND TECHNICAL 3.1 TCVN2737-1995 longitudinal bridge axis is inclined 46o to H10% = +14,54m brownish yellow Medium dense (SC-SM) Layer - Constructed water level to Experiments for evaluating the quality of bearings must be carried coefficient Basic design wind velocity: V = 53m/s, bridge, Highest water level H1% Acceleration wings: L = 222.1 m Maximum flood water level at LRB08 bridge is proposed as below: V-3) - Design water level Medium dense (GP) Layer Design flood frequence for bridge: 2.3.2 brownish yellow Stiff (CL) - grey, P = 1% (period 100 years) grey, brownish yellow Loose (SP) - bluish Leyer 5c : Granite rock fresh to slightly below: grey, - grey, greenish grey (V-1) Geological feature layout of bridge and geological investigation - grey, weathered Whitish grey, dark grey, bluish For detail of geological section refer to general - dark - 22TCN272-05 - greenish grey.(V-2) sunshine and low humidity yellowish - conform Layer 5b : Granite rock, moderately weathered grey, Earthquake: Using steel-reinforced elastomeric bearings for pc-I A=0.0493, conform to TCXDVN375:2006 Layer 5a : Granite rock highly weatherd into Whitish this climate there are often many big rain Dry - Dense.(extremely Very hard.(V-3) September last year to February this year In grey, grey gravels with sand, learn clay, breakstone quatity of rain is 2000mm Climate has two Layer 1a - weathered granite V-3) (SC-SM) and annual average humidity more than 80%, - : Clayey-silty sand mixed gravel greenish Bridge area is the tropical monsoon climate 2.2 Layer 4c - design specifications 22TCN 272-05 whitish grey, yellowish grey, bronish yellow, KM39+652.45, at Quang Ngai province Layer 4b specifications with manufacturer and related