Reply of Nanning Development and Reform Commission on the Preliminary Design of Yongwu Road Reconstruction and Extension Project (Peak Toll Station-North Gate of Peak Forest Park)
Nanning Traffic Asset Management Co., Ltd.:
The request for instructions on applying for approval of the preliminary design of the reconstruction and expansion project of Yongwu Road (peak toll station-north gate of Gaofeng Forest Park) (No.288 [2021] of Nan Jiao Zi Bao) and relevant materials have been received. According to the Regulations on Government Investment (Guo Ling No.712) and the Evaluation Report formed after Nanning Engineering Consulting Group Co., Ltd. organized experts and relevant units to evaluate the Preliminary Design of Yongwu Road Reconstruction and Extension Project (Peak Toll Station-North Gate of Peak Forest Park), the preliminary design is now approved as follows:
A, the project code:2103-450100-04-01-906440。
Second, the project construction site:Nanning Xingning District, High-tech Zone.
III. Construction Scale and Main Construction Contents:The project starts at the end of the 40-meter section of the existing Yongwu Road, basically extending from south to north along the county road 037, passing through the expressway around the city, passing through the south gate of Gaofeng Forest Park, and finally ending at the north gate of Gaofeng Forest Highway. The construction length of the route is 4.286 kilometers. The main construction contents include: subgrade engineering, pavement engineering, bridge and culvert engineering, cross engineering, temporary engineering, traffic engineering and facilities along the line, lighting engineering and other projects. The project is implemented in two stages, A and B, as follows:
Section A (K0+038~K1+720) starts from the south gate of Gaofeng Forest Park, with a total length of about 1.682 kilometers. It is built according to the standards of the second-class highway, with additional lighting engineering and off-site law enforcement system engineering for overload control, and reserved conditions for reconstruction and expansion. Among them, the subgrade width from the starting point of the route to the expressway around the city (K0+038 ~K0+680) is 18 meters; The width of subgrade from the expressway around the city to the south gate of Gaofeng Forest Park (K0+680~K1+720) is 8.5m, and K0+840~K1+280 is used by the old road.
Section B (K1+720~K4+324.159) is from the south gate of Gaofeng Forest Park to the north gate of Gaofeng Forest Park, with a total length of about 2.604 kilometers, maintaining the current roadbed width of 8.5 meters, and only repairing and improving the road surface and improving traffic safety facilities.
Four, construction standards and main technical indicators:
The project is implemented in two stages, A and B, as follows:
1. Section A (K0+038~K1+720)
(1) Road grade: Class II highway;
(2) Design speed: K0+038~K0+680 is 60km/h;
K0+680~K1+720 section is 40km/h;
(3) Road width: K0+038~K0+680 is 18 meters wide (where K0+038
0 ~K0+220 is a 40-meter-wide connecting transition section from the existing Yongwu Road to 18 meters);
K0+680~K1+720 section is 8.5m wide (including
K0+680~K0+840 is a connecting gradual change section with a width of 18 meters and a gradual change to 8.5 meters);
(4) Number of motor vehicle lanes: K0+038~K0+680 are two-way four lanes;
K0+680~K1+720 section is two-way and two lanes;
(5) Pavement structure: asphalt concrete pavement and asphalt concrete overlay structure of old road;
(6) The design service life is 12 years.
(7) Structural safety grade: Grade II;
(8) Vehicle load level: highway level 1;
(9) Seismic fortification: the basic earthquake intensity is 7 degrees, the peak acceleration value of ground motion is 0.1g, and the characteristic period of response spectrum is 0.35s.
2. The technical standards of highway in section B (K1+720~K4+324.159) remain unchanged, and the indicators of the current plane profile are not adjusted, only the pavement is repaired according to the asphalt overlay structure of the old road, and traffic safety facilities are added.
Five, the main engineering design:
(1) Road engineering: In principle, the design of road plane, longitudinal section, cross section, intersection, subgrade and pavement engineering is agreed, and the cross section of road adopts the form of single road. Among them, K0+038~K0+840 and K1+280-K1+720 in Section A are newly-built asphalt concrete pavement structures, and K0+840~K1+280 are used by old roads, and the pavement (including base and cushion) will be reconstructed after the disease is repaired, and the asphalt concrete structure will be paved. Section K1+720~K4+324.159 of section B is used by the old road, and asphalt concrete overlay is added after repairing the disease.
(2) Culvert project: The culvert design is agreed in principle. In section A, three circular tube culverts were demolished and three 1-φ1.5m circular tube culverts were newly built; The existing 1-2×2m slab culvert located at K1+622.500 adopts the new 1-2×2m trapezoidal slab culvert to connect the old culvert; New 1-4×4m cover culvert protection status D500 oil pipeline in K1+540; The K1+600 gas pipeline crossing the road was relocated.
(3) Traffic safety facilities: it is agreed in principle to design traffic signs, marking lines, safety guardrails, delineator, road boundary markers, crossing markings, etc. Among them, the traffic safety guardrails are grade A three-wave beam steel guardrails, section A K0+120~K1+720 is set according to newly-built roads, and section B K1+720~K4+324.159 is demolished and re-set.
(4) Lighting engineering: the lighting design is agreed in principle. In the 18m standard section of section A, the single-arm lights are symmetrically arranged on the shoulders on both sides of the road and the outside of the side ditch; in the 8.5m standard section, the single-arm lights are arranged on the outside of the road drainage ditch, and the lamps are LED lights.
(V) Off-site law enforcement system project for overload control: It is agreed in principle to set up off-site law enforcement system for overload control in K0+870, and use the existing law enforcement stations and parking lots to build non-stop overrun detection points, mainly including high-speed dynamic weighing subsystem, intelligent license plate capture subsystem, video monitoring subsystem, overrun information release and guidance subsystem, power supply voltage stabilization and lightning protection system, information hardware and law enforcement site signs and signs.
VI. Total investment of the project:The estimated total investment of the project is 86,886,200 yuan, including 33,921,600 yuan of engineering cost, 45,655,200 yuan of compensation for land requisition and demolition, 3,172,000 yuan of other engineering construction costs and 4,137,400 yuan of basic reserve funds.
VII. Sources of funds:Municipal finance.
Eight, the next design stage needs to be supplemented and improved:First, further verify the adaptability of pipeline facilities (oil and gas) along the line to the reconstruction and expansion project, and deepen the connection design scheme; The second is to deepen the traffic organization design during the project implementation.
Nine, please further deepen in the next stage according to the preliminary design evaluation report.Optimize the design, and go through the construction application and commencement procedures according to the prescribed procedures. Does not comply with the relevant laws,Construction shall not be started if the construction conditions stipulated by administrative regulations are met.
Ten, please strictly according to the approved construction site, construction scale, construction content, construction.Set standards and investment estimates and other control indicators to implement the construction, in principle, shall not be changed and sudden.Break. If the scale of approval is exceeded before the project bidding is completed, it must be reported to our Committee for re-approval.Complex preliminary design and budget estimate; Engineering changes in the process of project construction, should refer to the "on the issuance of strengthening the Nanning municipal government investment in construction engineering design change management.Know "(No.431 [2014] of Nan Fa Gai Cheng) to handle the change procedures. After the project is completed,It is really necessary due to the adjustment of national policies, rising prices and major changes in geological conditions.If the investment estimate is increased and the procedures are complete, it must be reported to our Committee for adjusting the investment estimate.
Attachment:
Summary of Preliminary Design Budget of Yongwu Road Reconstruction and Extension Project (Gaofeng Toll Station-Gaofeng Forest Park North Gate). docx
nanning municipal development and reform commission
May 26th, 2021
(The Development and Reform Commission of the Autonomous Region received a complaint report from leading cadres for intervening in the supervision of clean government in engineering construction: 0771-2328688; The Discipline Inspection and Supervision Team of the Commission for Discipline Inspection of the Autonomous Region stationed in the Development and Reform Commission of the Autonomous Region received the complaint report of leading cadres intervening in the supervision of clean government in engineering construction: 0771-12388. Address: Discipline Inspection and Supervision Team of the Commission for Discipline Inspection and Supervision of the Autonomous Region Development and Reform Commission, zip code: 530028)