大广高速公路深州连接线下穿京九铁路立交桥工程设计探析 - 凤凰彩票购彩,凤凰彩票购彩攻略,凤凰彩票购彩大厅
在线客服

咨询热线

大广高速公路深州连接线下穿京九铁路立交桥工程设计探析

作者:未知

  Big wide highway ShenZhou connection line in the Beijing-Kowloon railway bridge engineering design in this paper 中国凤凰彩票购彩 https://www.xzbu.com/8/view-2229921.htm  Wang tao
  China railway fifth to investigate design group Co., LTD. The bridge
  the
  This paper summarizes the big wide highway ShenZhou connection line in the Beijing-Kowloon railway bridge engineering characteristics, introduces the construction process of the technology and method. Analyses the swivel overpass and span railway bridge under in the design characteristics, summarizes the big wide highway ShenZhou connection line in the Beijing-Kowloon railway bridge engineering have experience.
  Key words: wear railway, the swivel overpass, bridge design
  1. The introduction
  Highway under way across the wear of railway, with safety, time is short, the cost of railway operation effect of provinces, the advantages of small, big wide highway ShenZhou connection line in the Beijing-Kowloon railway bridge engineering, marked the overpass engineering in China and a progress, research and analysis of its design and learn from the successful experience, and in the future we bridge design is of great significance.
  This paper through analyzing large wide highway ShenZhou connection line wear the Beijing-Kowloon railway construction methods of the overpass design, for this bridge design characteristics, to design the same bridge after has this very good reference value.
  2. The general design
  According to the road, railway condition, the condition such as terrain and object, the design is as follows:
  Road and rail lines in the intersection of railway lines for K237 mileage + 150.1, roads and railway lines centerline the Angle of cut for 90 °.
  The framework structure one-by-one, net cross for 16 m, new frame bridge and railway lines JiaoJiao center line for 90 °. Frame bridge at the top of the roof from railway rails underside 0.8 m. Frame bridge structure a total height of 8.6 m, the structure is clear height of 6.5 m, 1.0 m thick roof and floor thick 1.1 m, 1.0 m thick wall, roof haunched use 0.5 x 1.5 m, floor haunched all use 0.2 x 0.2 m, frame bridge main body long for 15.0 m.
  Frame bridge structure clear height of considering the ZongPo road cross-sectional slope roof, haunched, pavement, shop outfit, top into error, and construction technology, the effects of the road in place after the top into formation, motor lane use clear height of more than 5.1 m.
  Frame bridge main front blade Angle long 5 m, the main body of the wall after the long, 3.5 m, end wall lateral sidewalk cantilever plate length 2 m. Frame bridge in jacking in place will blade Angle according to subject structure for wall together, both sides meet gravity retaining wall.
  3, frame bridge subsidiary structure and auxiliary project
  1, a gravity retaining wall gateway, to ensure safety and stability of roadbed.
  2, frame bridge QiaoOu on both sides and roadbed in top into before the grouting strengthening prevent subgrade in top into process collapsed; Frame bridge in the top sides subgrade into after grouting consolidation, frame bridge into the lateral wall when the catheter into with top, top, into the side in place of graded sand collapse backfill grouting reinforcement after, that in the roadbed compaction degree after top into and stability.
  Three, the bridge, on the bridge 50 kg/m of laying the wheel/rail, sleeper for new Ⅲ replacement type bridge pillow, the pillow to fill in the primary way ballastless, bridge road way online ballastless ballastless feet set L block of violations.
  4, frame bridge four corners a pile of roadbed roadbed protection, frame bridge blade Angle set support and resistance to pile side move transversely pile, resistance on pile top move transversely set L reinforced concrete roof beam, support a pile top work 45 b range crown beam, the protection of reinforced concrete pile top set crown beam.
  Line 5, reinforcing system: the 3-5-3 clasp crane rail beams and carried out the method of longitudinal beam and decorate range and roadbed protection pile, support and champions league beam, resistance of lateral movement of the pile and beam line reinforcement system (meet the train go slow 45 Km/h requirements).
  6, line the move transversely measures: frame roof precast in the tail when every 3 m set up the TAB, but the chain and line reinforcement system relates in together, with the top with the taut pour into chain, bridge outside the uplift taut lines set up; To set up the side of subgrade move pile.
  7, in jacking construction in frame bridge in blade Angle front a steel blade Angle, steel blade Angle in top position in dismantling after.
  8, railway roadbed on both sides of the various cable, fiber optic cable should be in the frame bridge in jacking take corresponding measures before the transition.
  9, frame bridge set top sides bilateral steel bars, railing against the ballastless steel plate and a double chamber cable trough, the lateral set defend net, height of 2.2 m.
  10, frame bridge the lateral wall a polyurethane waterproof layer, roof top set coil waterproof layer, end face a waterproof layer of steel fiber reinforced concrete protective cover. Roof steel fiber concrete cover every 4 m set a deep 5 mm wide 10 mm of broken seam, and polyurethane waterproof coating broken seam will fill in real, fill.
  11, frame bridge in jacking in place in a small block on both sides of the bridge water wall, roof waterproof layer protection layer to bridge water slope, will focus on with water after PVC pipe into the drainage system under the bridge, the bridge deck discharge pipes in the position in the wall.
  12, frame bridge in jacking in place, frame bridge and roadbed cohesion on both sides in M10 plasma set PianShi build by laying bricks or stones transition section.
  13, frame bridge on each side within 10 m, by railway roadbed standard backfill and compact, formation and the original of the subgrade smooth cohesion, roadbed using M10 plasma build by laying bricks or stones PianShi slope on the build by laying bricks or stones.
  14, frame bridge on both sides of the subgrade diagonal set walking check the steps, width is 1.0 m.
  15, frame bridge entrances are inferior to set bull Angle steel roof.
  16, frame bridge in jacking in place, as it defend the net on both sides of the railway recovery.
  4, design load and calculation
  4.1 design load
  41.1 railway design live load:-live load, by calculating live load: JQS standard load;
  Highway load: highway grade I (only consider its adverse effect).
  4.1.2 constant load: structure dead weight, line equipment is heavy, and the static earth pressure, live load soil pressure, concrete shrinkage, creep, and the temperature effect.
  4.1.3 other: train impact, braking force and live load earth pressure.
  4.2 structure calculation
  2 the frame bridge the internal force of Beijing jiaotong university of highway overpass railway (frame type bridge structure) finite element analysis software calculation, and USES the MIDAS structure analysis software for review.
  Blade Angle out according to the top in the process of train into bear temporary load on the design.
  Top force consider blade Angle of r3 resistance and various kinds of positive friction.
  5, main engineering materials
  1, concrete
  Under the frame of the subject, wear railway blade Angle blade Angle and cantilever, up together, pavement cantilever, tail wall all the C35 concrete, anti-permeability index is not less than the P8, alkali content of concrete shall conform to the concrete alkali content restrictions "(CECS53) requirements; Cable trough the C25 concrete; Working pit board, anchor beam, guide the pier C25 concrete; The gateway C25 retaining wall, C30 concrete; Waterproof layer by layer C40 steel fiber reinforced concrete; Working pit back beam, protecting piles, resistance to move transversely pile and top C25 concrete beams.
  2, reinforced
  HPB235 reinforced, [σ 0] = 130 Mpa;
  HRB335 reinforced, chemical composition C + Mn / 6 or 0.5% [σ 0] = 180 Mpa the high pressure in water treatment.
  Reinforced technology conditions should be consistent with existing national standards "reinforced concrete rollsteel light round steel" (GB13013) and the reinforced concrete rollsteel ribbed reinforcement "(GB1499) regulation.
  3, waterproof layer
  Frame bridge the lateral wall a polyurethane waterproof layer, roof top surface coil set waterproof layer.
  4, settlement joints
  Framework between subject and retaining wall 3 cm a settlement joints, settlement joints fill in 3 cm thick asphalt leaching of wood.
  In addition to the special indicate, the design of the material level of performance parameters should accord with the railway bridge reinforced concrete and prestressed concrete structure design specification of the relevant regulations.
  6. Engineering and hydrogeology conditions
  6.1 stratigraphic lithology and physical and mechanical properties of soil layer
  According to the survey reveals drilling. Construction site exploration depth within the scope of the stratigraphic lithology is new for the fourth alluvial (1), (2) powder soil silty clay, (3), (4) powder soil silty clay, (5) powder soil, 6 powder sand, 7, 8) silty clay powder soil, 9) silty clay. According to the lithology and engineering properties, lithological features from up to down of points as follows:
  (1) powder soil (Q4al) : a thick layer of 4.9 ~ 5.6 m, cinnamon, 0.5 m for planting surface soil, contain plant roots, soil don't even, local including opaque clay interlayer, cannot rub into strips, hand twist sand are stronger, rough cut, including rusty spot, damp, a little secret. Basic bearing capacity 120 kPa.
  (2) the silty clay (Q4al) : cinnamon, thick layer of 1.6 ~ 2.4 m, soil don't even, local including powder soil interlining, hand twist slightly sand feeling, can hand rub into strips, cut a smooth, including rusty spot, plastic, Ⅱ ordinary soil level. Basic bearing capacity 120 kPa.
  (3) powder soil (Q4al) : cinnamon, thick layer of 0.8 ~ 2.1 m, soil don't even, local including opaque clay interlayer, cannot rub into strips, hand twist sand are stronger, rough cut, including rusty spot, damp, ZhongMi, Ⅱ ordinary soil level. Basic bearing capacity 120 kPa.
  (4) the silty clay (Q4al) : cinnamon, thick layer of 1.6 ~ 2.4 m, soil don't even, local including powder soil interlining, hand twist slightly sand feeling, can hand rub into strips, cut a smooth, including rusty spot, the hard plastic, Ⅱ ordinary soil level. Basic bearing capacity 120 kPa.
  Frame bridge and retaining wall in opaque substrate of clay layer, the basic capacity 120 kPa.
  6.2 hydrological geology characteristics
  According to the survey, the site of the fourth is groundwater pore water, mainly accept precipitation supply, change range of groundwater by precipitation, underground water level is low, the water level elevation 8.91 ~ 9.61 m, the ground surface evaporation and (the influence of flow is larger. The field of concrete without aggressive groundwater.
  7. Construction scheme
  7.1 construction plan
  The railway bridge in the framework of the straight construction, working pit in the Beijing-Kowloon railway east side, from the east to the west in jacking. Top into weight: 2636.1 t, the biggest jacking force: 3934.7 t, conduct a process: 39.4 m.
  Working pit back 40 b the range of reinforced concrete pile and back in the form of beam, strengthening the buckle rail line the beam and the range of the longitudinal pick up method, top, and to frame bridge into shall be QiaoOu on both sides and roadbed grouting consolidation, top, into the four corners of the bridge before the framework set hole protection piles, the front end of the bridge in the framework set support and resistance to move transversely pile pile.
  Retaining wall with 2 m thick foundation sand pebbles. The backboard framework for 1% of the bow set gradient slope. Frame bridge QiaoOu on both sides and roadbed in grouting reinforcement in jacking before and after. Framework in jacking bridge before, must be both seamless route to take stress radiation measures. Framework on the board prefabrication, concrete strength to design strength, and then began to top into. In jacking framework shall be completed prior to all kinds of railway equipment, pipelines, etc, the reinforcement of the move to work.
  Railway roadbed on both sides of the slope feet 15 m place all have a tour of the optical fiber, the framework in jacking bridge before the change and protective measures.
  "For # 11" and "for # 12" nets lever in frame bridge sphere of influence. In the frame bridge before moving into the top to deal with.
  Frame bridge are catenary rod on both sides, the latest signal bar # 007 model of the stem for 11.6 m distance, the roadbed protection pile of protection.
  Frame bridge on the board prefabrication, concrete strength to design strength, and then began to top into.
  7.2 the matters needing attention
  1 before construction, to make the construction plan, report to the relevant departments of the railway administration obtained approval, and the relevant departments and railway administration to formalities, to make effective safety measures to ensure running and personal safety.
  2 construction to prevent the rainy season, and if it must be in the rainy season construction, before start working, must with railway administration relevant departments do good procedures, to strengthen the safety measures before the construction, prevent the foundation pit and roadbed collapsed, and well for flood control, it is strictly prohibited to soak into the flood of foundation pit.
  3 when construction, to improve road design department of the Central Line shall prevail, after completion of highway railroad league to measure, completion shall be corrected for railway height map.
  4 before construction should be all kinds of railway equipment, pipeline and cable handled well, be sure to ensure security.
  5 main body bent to pick up framework reinforced long, joint to use flash butt weld ends, and shall be vertical polishing processing.
  6 the before placement, should check whether the embedment parts is complete.
  7 mass concrete casting, pay attention to its and working pit skateboarding effectively separated, floor surface to try to smooth, level off, and apply lubricant, prevent floor and skateboards stick together, top, into the startup problem.
  8 case to meet the design strength concrete 100%, waterproof layer and layer by laying good design, and the top can be conducted only try in jacking construction, top, into the system should be reserved in strengthening the gateway to the retaining wall complete demolition.
  9 for contract and to prevent concrete crack, choose aggregate concrete requirement when have the largest compaction degree, to strictly control the water consumption, cross carefully, besides using the effects, pectin and reinforced in a secret place must put qian dao with reality, and carefully maintenance, timely watering, dismantling formwork later.
  Top 10 in the top, must complete various protection facilities construction, top, into the control when the top force and the good direction, in the process of top into, with both sides of the soil and the whole framework weathered rock subgrade grouting reinforcement, ensure roadbed stability.
  And take appropriate measures to prevent line move transversely.
  12 for the lines of both before bringing stress.
  13 after the foundation pit excavation, promptly notify the design institute for examination chamfer; Top into process, such as the discovery of geological conditions and design with discrepancies, timely and design unit relation.
  14 the drawing, or this description is not stated are in accordance with the current of the railway bridge construction standard "and" the highway bridge construction standard "of the relevant regulations.
  8. Overpass project of influence by railway equipment tear open change, protection engineering
  8.1 tear open change, protective measures
  Railway roadbed on both sides of the slope feet 15 m place all have a tour of the optical fiber, the framework in jacking bridge before the change and protective measures.
  "For # 11" and "for # 12" nets lever in frame bridge sphere of influence. In the frame bridge before moving into the top to deal with.
  Frame bridge are catenary rod on both sides, the latest signal bar # 007 model of the stem for 11.6 m distance, the roadbed protection pile of protection.
  The line protection for then referred to beam dig-hole pile construction of the Beijing-Kowloon railway line protection. According to the design requirements, in jacking construction to integrate 16 m + 24 m + 16 m 3 hole and reinforced beam, including 24 m a main ends dig for pile foundation, 16 m beam ends for deep 2.0 m a pier.
  8.2 during slow circuit safety protection
  (1) line protection: protection set ZhuZhan liaison 1, construction site 1, construction site 800 meters beyond all of one, four people who plan, the uninterrupted class 3, and the construction site of a staff and a pier beam and line status of observation, protection, such as a different shape handle in time.
  (2) the speed limit according to rules of maintenance safety set.
  (3) safe:
  (1) before operation, and dispatching, station value spot member, works scheduling for contact and confirm the train pairs, to the moment.
  (2) all kinds of machines, materials can't invade limit, can't influence signal display
  (3) man and the protection command on the use of cell phones and liaison.
  (4) ZhuZhan liaison should strictly carry out "forecast" and "it reported" system. Site ZhuZhan protection liaison to send
  The notice immediately after warning sirens construction personnel to avoid road car, and will bring about the object tools outside.
  (5) train traffic, it is strictly prohibited to digging into the operation period and the top of the train speed speedometer for observation.
  conclusion
  Big wide highway ShenZhou connection line wear the Beijing-Kowloon railway bridge engineering design is successful, through to the bridge construction experience in the process of analysis, we can make the similar projects in the future less mistakes, have realistic significance.
  reference
  [1] the highway bridge construction technology standard "(JTJ041-2000);
  [2] the highway engineering technical standards (JTG B01-2003);
  [3] the highway engineering quality inspection evaluation standard "(JTGF80/1-2004);

转载注明来源:http://www.gelisagency.com/8/view-2229921.htm



凤凰彩票购彩凤凰彩票购彩攻略凤凰彩票购彩大厅