沪闵高架路二期工程设计[1]（Design [1] for the second phase of humin high road）

沪闵高架路二期工程设计[1]（Design [1] for the second phase of humin high road） 沪闵高架路二期工程设计[1](Design [1] for the second phase of humin high road) PRESTRESS TECHNOLOGY, the 65th issue of the 65th issue of 2007, PRESTRESS TECHNOLOGY Design of the second phase of hu-min high road Chen qisu liu xiao ping (Shanghai urban construction design institute Shanghai 200125) Abstract: this paper mainly introduces the design technical standard of engineering, the characteristics of the design scheme of the major transportation node, and the design of the architectural design of the city viaduct The major improvement of the construction and the construction process of the prefabricated section of the bridge machine used in the construction of the urban high road in China for the first time. Keywords: elevated road standards and design features Humin road is located southwest of Shanghai, and is southwest to northeast It is the south gate of Shanghai and Shanghai One of the backbone network of the city road network. It connects the city Area 3 ring line, namely inner ring, central ring and outer ring, both center The district leads to the main traffic of new towns such as minhang, golden hill and songjiang Corridor, is also the shanghai-hangzhou expressway, the 320 national road into the city road, The traffic network in southwest Shanghai is very important Status and role. Due to the importance of Shanghai min road in Shanghai's total road network In the overall planning of Shanghai road traffic, Shanghai min was identified The road is in the outer ring line of xinzhuang to the inner ring road of the road interchange section of the road Planning road level of urban express road, road planning red line width Take hongmei road as the boundary, and the outer loop line is 70m, to the cao xi road The direction is 56m. With inner ring line, outer ring line, xinzhuang interchange, shanghai-hangzhou expressway The construction of highway and other works has been formed along the routes of humin-min road and kao xi road Great traffic pressure. Therefore, the reconstruction project is very urgent. The whole line of Shanghai minmin road has been converted from the outer ring road to the north end of xinzhuang Starting from the inner ring of the cao xi road, the total length is 7.9 km. According to the delivery The implementation of the project will be conducted in two phases, such as general, planning and investment. The first phase of the project is to make the interchange of liuzhou south road to cao xi road, 2.5 km long. The main traffic nodes along the route have the intersection of cao xi road and cao bao road Mouth, etc. The second phase of the project is to make the north end to liuzhou south road for xinzhuang, 5.4 km long, the main traffic nodes along the route have xinzhuang and hongmei Road interchange, Shanghai railway south station, etc., across the main river channel Pu river, zhangjiantang port. The engineering location is shown in figure 1. The first phase of the project was completed in September 1997 Opened to traffic. The second phase of the project started on December 19, 2001. It will be completed and open to traffic by the end of this year, with total investment of 1.6 billion yuan. Note: the prefabricated section of Shanghai humin elevated prefabricated section is equipped with prestressed curved wide box girder The project won the second prize of the second ovim prestress technology award. The project has made a breakthrough in the architectural modeling of viaduct, and the first rule Construction technology of prefabricated section of bridge machine is adopted. Second phase The construction will give the overall benefit of the whole phase ii reconstruction project Full play, make the road network in southwest of this city get a lot of perfect. The second phase of the hu-min highway The first phase of the hu-min highway The inner ring of cao xi road interchange Caohejing emerging technology development zone The Shanghai and hangzhou High speed Shanghai The railway South railway station The south mall xinzhuang interchange willow state Road, Hong mei road interchange rainbow mei Road, south pu The river Outer ring line lake outside ring line FIG. 1 location of humin high road project This paper mainly discusses the design situation of the second phase project Salt is as follows: 1 traffic prediction By forecast analysis, by 2002 mixed traffic volume (12h) : the first phase of the project is 12.1 ~ 144,000 units, phase ii The section of the project was 11.0 ~ 141,000. From the distribution of traffic, it is near the city center The traffic is high and the flow rate is relatively low in phase 2, hongmei 12 PRESTRESS TECHNOLOGY, PRESTRESS TECHNOLOGY, the sixth issue of the sixth issue of 2007, PRESTRESS TECHNOLOGY Road west section is 110,000 vehicles, compared with the average flow rate of the first phase Less than 2.0 million. Main design standards The main design criteria and phase I project of the second phase project have been maintained To which: (1) the design speed elevated road is 80km/h, ground The road and ramp are 40km/h. (2) elevated road and ramp bridge for vehicles - Level 20, trailer - 100; The ground bridge is a car - super 20, Special flat car - 420; Surface road surface structure is BZZ - 100. Seismic design standard is based on earthquake intensity of 7 degrees, importance The coefficient is 1.3. (3) the main road of traffic clearance standard is 5.0 m, horizontal The main road of the road is 5.0 m, and the secondary road is 4.5 m. (4) the recurrence period of rainstorm in high road of drainage standard is 2 Annual runoff coefficient. ? = 0.9; Surface road rainstorm recurrence period P = 1 Annual runoff coefficient. ? = 0.6. 3. General design overview (1) high road from xinzhuang to the north end of about 220m At the intersection of the dianpu river and lotus road, cross hongmei road Cross guilin road, south liuzhou south road, and another The high road connects. The elevated road has a total length of 5.2 km, with a two-way of 6 vehicles The total width of the standard segment is 25.5 m. (2) the ground road from xinzhuang to the north, to the willow East of south road, the total length is 5.4 km. Set up two-way 6 ~ 8 machines Move the driveway with non-motorized lanes and sidewalks. The road The width of the diapir is put in red line in the 70m red line. in In the 56m red line, road sections with turns are provided Expand 7.0 m, i.e. 70m width. Road cross section cloth See figures 2 and 3. (3) 15 ramp road ramp, with 7 pairs arranged in pairs Article 14. The overall layout of the on-ramp is shown in figure 4. On the overall layout of the ramp, the D and E of the dianpu river bridge The upper and lower ramps and the height of the landing are in each direction Traffic flow and connection; WN, NW, NW before and after hongmei road, The SW, B, C, A, and zero ramp forms A and existing hongmei The road and central loop transportation system, and the railway south station The connection between WS, SW, ES, SE and south station main building 2 platform 1. The landing ramp of the 1st and 2nd floor and the landing ramp of the first phase have been built, The connection system of air and ground transportation is formed. 25.5 4.0 1.5 56.0 ~ 70.0 11.75 1.5 4.54.0 Figure.. 2 no ramp road cross section. 8.025.5 8.5 2.0 4. 0 7.5 9.0 11.25 6.5 4.0 7.5 9.0 11.25 70.0 Figure.. There are ramp road sections Figure.. 4. Overall layout of the ramp along the line Xinzhuang interchange The starting point of engineering Harbinger road Lake pu river crossing Wan Yuanlu Lianhua road Rainbow road interchange Zhangjiagang bridge Guilin road Liuzhou south road Project at the end of Issue 1 scope... It is a little more than one 4 # SESW WS 2 # WN # c # # # 6 carriageway elevated. 5.2 km 5.4 km (4) the overall line layout, due to the 70m planning red line The heart line is relative to 56m, and the Central Line of the planned red line is south by 7.0 m At the time of hongmei road interchange, the general plan comprehensive analysis, adopted The arrangement of high - frame road cross - line Bridges. Therefore, in the The layout of the center line of the road is considered according to the variation of the width of the red line At the end of the hongmei road, the high - frame sections of the road formed one at each end The "s" inverse small deflection curve, and the minimum of the specification Under the length of the flat curve, the flat curve is equal to 20,000 ~ 45500 m. (5) elevation of ground road longitudinal section, considering the edge The elevation balance of the intersection of the street lane is generally controlled at 5.0 ~ 5.8 m, the highest elevation of the yidpu bridge is about 11.2 m. Elevated road The elevation of the longitudinal section is generally 13.5-14.5 m, hongmei road interchange The height of the high viaduct is about 29.1 m. Highway longitudinal The slope is 0.4% ~ 4%, and the ramp slope is less than 6%. (6) asphalt concrete structure is adopted on ground road surface. The structure consists of: 3cm fine grained asphalt concrete (LH - 15) granulated asphalt concrete (LH - 25) and 6cm in 5cm Coarse asphaltic concrete (LH - 35) and 45cm fly ash 3 Slag, 15cm gravel. Asphalt concrete is used on elevated road surface Surface layer pavement, the structure combination is: 3.5 cm fine grained asphalt mixture Soil (LK -. 15-0), 2.0 cm sand asphalt concrete... 13 PRESTRESS TECHNOLOGY, the 65th issue of the 65th issue of 2007, PRESTRESS TECHNOLOGY (LH - 05). (7) the "L" type reinforcement is mixed in the whole line after the ground bridge On the outside of the clotting retaining wall, the elevated ramp leads to the bridge straight Take the landing form. The line also sets up the blind trail for the disabled Facilities such as the disabled ramps. (8) the upper structure of elevated bridge is suitable for the new architecture And the construction process, and meet the construction maintenance 4 fast 2 slow traffic Take the form of continuous box girder with the base of the main beam as arc form, A steel box with the same shape is adopted in the unapplicable section of the bridge Beam and cast-in-place concrete box girder type. The cross-section of the superstructure The cross - diameter of 30 m is the standard. 3 ~ 5 span is a link. (9) the bridge pier of the lower structure of the elevated bridge is adopted without cover beam. The form of tree fork column, the two columns are pulled by prestressed concrete The bar balances external forces. The pile foundation adopts phi 600PHC for the field conditions Pile and phi 800 bored pile. (10) bridge of the ground bridge and zhangjiagang bridge Seat. The dianpu river bridge is a 6 - class channel, with two bridge groups Together, the bridge is 23m wide, each about 240m long and cross river main bridge For the 3-hole 35m prestressed concrete box girder, the bridge is 2 ~ 4 straddling hollow beam and conventional abutment, 450x 450 steel is used for pile foundation Reinforced concrete square pile; Zhangjiagang bridge is a single span 22m, according to the ground Road building width 56m layout. The upper structure is the hollow beam, down The structure of the part is phi 800 bored pile. Main features of engineering design 4.1 hongmei road interchange node The scheme of the node of hongmei road, whether in phase I or phase ii In the course, all the experts in various aspects of the high concern and heavy Depending on the. Due to historical reasons, the construction of the original hongmei road has not yet been established There is a plan for the hu-min highway, the construction land is small, there is also the subway Line 1 and high pressure corridor restrictions, conditions are very tight, high How is the road crossing and how to complete the traffic On the connection, a variety of schemes have been proposed for in-depth study, including high The frame is on the south side of the cross - interchange scheme, high - mounted on the road through hongmei road The interchange scheme and the high end of the interchange shall be separated from each other Case, and part of the demolition of the interchange with the elevated docking and upper structure Departs, etc. Through thorough analysis and comparison, final recommendations The high riding span is passed through hongmei road and made by reasonable and feasible turns The road layout completes the plan of the high - frame and the interchange of traffic, the special The recognition and praise of the family (see figure 5). FIG. 5 effect of hongmei road 4.2 the link between Shanghai mingao road and Shanghai railway south station Shanghai railway south railway station is not only a railway, metro, city The city is elevated to a major transportation hub, and is Shanghai An image project in the 2l century, not only in dredging the traffic flow, Traffic flow, and on the Shanghai minmin road elevated, ground transportation There are high demands on the surface and the architectural environment in the area The physical landscape has also raised very high demands. On the other hand, Shanghai In the traffic function, mingao road also undertakes a lot of transit traffic And the area traffic, the road design standard is high, the construction condition is various More restrictions. In addition, the south station project involves railway, metro and main Station, square and other design units. So, at the junction ramp The overall research of the cohesion scheme is to solve the overall landscape and square rules In terms of environmental conditions, traffic functions and design standards of elevated roads, etc The contradiction of the question of face is acceptable to all parties to the general design scheme And meet the balance of requirements, and put forward nearly 10 connections The scheme has established the overall architectural landscape requirements and elevated traffic functions Design criteria must be equal and important. After many modifications, in satisfaction Traffic function and design standards, and landscape, planning, environment and so on There was agreement on the coordinated plan 4. Overall layout The body is: 4 main buildings in and out of the square to meet the landscape and high erection It is required to make directional arrangement on both sides of the square, and take each left on the elevated one Ramp. The establishment of the scheme has been confirmed by the municipal government. 4.3 the connection between the elevated highway and the xinzhuang interchange Xinzhuang interchange with this project, the interchange is in and out of 5 A direction. According to the direction of the design of the speed of the Shanghai and hangzhou expressway The direction of the city is 80km/h, the rest is 40km/h and The characteristics of the layout of huhang expressway in the ground floor are studied The elevated frame is directly on the ground, and the main traffic flow - huhang expressway Connect the road and add the landing ramp to other directions Overall plan. Because the elevated shelves need to cross more social vehicles The intersection of the entrance of the spring road, the distance between the elevated and the ramp way The mouth is only 240m, and the length of this section is freely interwoven with the vehicle 14 PRESTRESS TECHNOLOGY, PRESTRESS TECHNOLOGY, the sixth issue of the sixth issue of 2007, PRESTRESS TECHNOLOGY It is inappropriate and there are more points of conflict. For the love Situation, the traffic flow flows in each direction of the node carefully On the basis of the characteristics, it is proposed to set up the existing separation zones Extension to high and ramp feet, reasonable separation, direction guide Traffic flow in and out, and in the elevated, ramp, ground road division The guide to the early warning of the diversion of traffic organization programmes. A hand in The organization scheme eliminates the conflict of the node and greatly reduces it The interweave, better solve the traffic organization problem of this node. 4.4 compared with the first phase project, architectural modeling and shi ing in viaduct There are major improvements and breakthroughs in workmanship. According to the construction of the second phase of the bridge construction, construction work The art is put forward to pay more attention to the bridge building aesthetic, further mention Design and construction technology content, level and Shanghai city The overall image of the city as a contribution requires us to do the following Deep research. 4.4.1 architectural modeling of Bridges It is recommended that the main beam bottom is the continuous box girder with curved surface The vertical column of the lower structure adopts the construction of a tree fork Building form to meet people's desire for convenient transportation infrastructure On the basis of the people, the pursuit of urban aesthetics and spiritual civilization. 4.4.2 construction plan In this paper, the method of bridge machine construction is put forward No pavement construction was taken during the girder stage. So we're going to start with the current path Hold 4 fast 2 slow traffic, then the construction status of the road section, finally in Bridge frame girder in 14m width (see figure 6). Figure.. A cross section near the lake When the frame beam Maintain traffic to maintain traffic and maintain traffic Current status old center line design road center line The road surface of the old road surface road north. 8.25. 11.25 4.54.0 8.25, 4.5 4.0 35.0 35.0 70.0 4.4.3 structural design (1) the method of feeding beam under the bridge of upward bridge The uplink can be fed at the front or rear of the bridge The beam is suspended under a bridge, which is hoisted and turned by the trolley Moving, displacement section, and the lifting rod positioning the section. The downward The bridge machine is feasible, but it needs to be added to the equipment, and it needs to be strengthened Base, equipment reuse value is low. (2) adopt the full section section prefabricated assembly construction technology The maximum benefit of prefabricated section construction method is traditional with our country The factory prefabricated and the current status of the assembly process, the construction speed is fast, right The quality of concrete casting is not affected by the season. At present The largest segment in the world weighs about 100t, Construction speed is generally 3 days 1 The minimum radius of the flat curve can reach 75m. According to the project Vehicle width and section weight, the length of the main beam section is controlled at 2 - 3m, cross width considering section type, seam quality and not safety Frequency, structural integrity and construction progress, etc., adopted Full section of 25m wide. The lifting weight of the section is about 100 ~ 130t. (3) the form of continuous structural system transformation is adopted This multi - span simple - supported continuous scheme for bridge construction During the period, a multi-span simple beam is formed, and then the top of the pier is poured The prestressed beam reaches the system transformation and becomes multi-span continuous Beam. The method is used to control the accumulative error and pre-buried auxiliary Facilities, speed up construction progress, reduce construction difficulty, guarantee works The quality is better. In the simple support system, sulfur cement can be used in the beam Temporary support and control of the heating wire (see FIG. 7). Cast-in-place concrete Temporary support Permanent support Temporary support Permanent support for permanent support The girder stage system is transformed into a bridge stage Figure.. After the first simple branch, the continuous structural system transformation (4) key design of main beam design To prevent the girders from being subjected to water erosion, the section is adopted Epoxy adhesive material, rubber ring and vacuum grouting waterproof process, bridge deck It also adopts self-adhesive deck waterproof special rolling materials. It's also used in design Thirty percent of the prestress beam was carried out for the second phase and the live load. 4.4.4 the main scientific research projects Due to the construction of the second phase of the hu-min project in China The construction process of the prefabricated section of the bridge machine is used for the first time Engineering, therefore, carried out more research projects, mainly include: body The external beam and tensioning terminal steering gear are studied and the section deflection control is studied Research on C60 concrete and epoxy adhesive materials, transportation and transportation Study on the measurement of deformation during installation, study of assembling process between sections, The construction control research of the suspension beam in the bridge machine is carried out. Construction modeling and construction technology of the second phase of humin high road The change and breakthrough will be one of the highlights of the second phase construction. From the first phase of the project to the second phase of the project, its architectural modeling and construction The change and improvement of construction technology actually reflect the recent years The upgrading of the comprehensive economic strength and The Times demand of The Times. 15