Bidding Name: Procurement of the Support System, Suspended Bracket System and Formwork of the Prestressed Variable Cross-section Continuous Box Girder Bridge of the Sacambaya Road and Bridge Construction Project in Bolivia
Bidding Number: LQBO23N058-CGZB-01
Bidding Date: April 16, 2025
(Hereinafter referred to as the "Suspended Bracket Procurement")
I. Basic Project Information
l Instructions to Bidders
This bidding document conducts an open tender for the procurement of the suspended brackets for the prestressed bridge deck construction, the support system for the 0# block, the formwork for the 0# block, and the formwork for the pier columns of this project.
l Deion of the Basic Project Situation
Chinese Name of the Project: Sacambaya Road and Bridge Construction Project in Bolivia
Foreign Name of the Project: CONSTRUCCION DEL PUENTE SACAMBAYA Y SUS ACCESOS RVF 25
Country where the Project is Located: Bolivia
Project Industry Category: Road and Bridge Project
Chinese Name of the Employer: Bolivian Highway Administration
Foreign Name of the Employer: Administradora Boliviana de Carreteras (ABC)
Background of the Employer: Government Department
Source of Funds: Loan from the Inter-American Development Bank and the Caribbean Development Bank
Project Duration: 750 days starting from May 11, 2024
Scope of Work: Construct a single-span prestressed concrete box girder bridge with a main bridge length of 534 meters and a total width of 14.02 meters, and 4 main pier bearing platforms (with dimensions of 16.2m * 16.2m * 3.5m). There are 4 hollow thin-walled piers with a pier height of 27m, located at 80 meters, 205 meters, 330 meters, and 455 meters respectively. The main span is 125m and the side span is 79.5m. The extended roads on both sides are approximately 2045 meters long. The construction altitude is 1652 meters.
Attachments of the Original Contract Project Information:
a) One set of original bidding documents (in Spanish):
(1) [Attachment of Design Drawings] Anexos_Pte Sacambaya
b) Supplementary Materials on Site (in Chinese)
(1) [Demand Plan for Formwork and Suspended Brackets of Sacambaya Bridge]
l Bidding Time
Issuing Date of the Bidding Documents: April 16, 2025, Beijing time
Deadline for Submitting Bids: 17:00, April 30, 2025, Beijing time
Method of Obtaining the Bidding Documents: Contact our bidding specialist, Manager Li, during working hours to obtain them. The contact number is 15850550501.
Method of Submitting Bids: Submit bids electronically. Send the electronic version of the bidding documents (both the quotation documents and the summarized quotation documents must be stamped with a seal) to the following email address: 372032152@qq.com. In case of any revisions, the last version received before the bid submission deadline shall prevail.
II. Requirements for Bidders' Response Documents
l Business license (Both the bidder and each manufacturer are required to provide it)
l Special Qualifications: The manufacturer should possess a Special Equipment Manufacturing Permit (attach a copy of the certificate). The suspended bracket supplier should have a Special Equipment Manufacturing Permit (for bridge cranes category), and the formwork supplier should provide the ISO3834 Welding System Certification.
l Proof of performance in similar projects in the past five years, with a minimum of 3 cases (Supporting materials are required), and the total amount of these projects should not be less than 80% of the quotation amount for this project.
l If the bidder is not the manufacturer, a manufacturer's authorization letter is required.
l Estimated weight (The bidder can optimize the suspended bracket and formwork solutions according to the drawings by themselves, specify the specifications and respective weights of various types of steel, and the suspended brackets and formwork should be quoted separately).
l Drawings (if available)
III. Scoring Rules
Scoring Items |
Score Value |
Details |
Advancement of the Technical Solution |
20 |
Rationality of the design and optimization of materials |
Project Performance |
15 |
Quantity and scale of similar engineering cases |
Rationality of the Quotation |
40 |
Horizontal comparison with the average market price |
Production Cycle |
15 |
Whether it can meet the project schedule nodes |
On-site Inspection of the Equipment Factory and After-sales Service Commitment |
10 |
Configuration of the maintenance team |
IV. Technical Requirements
I. Technical Requirements for the Design of Suspended Brackets
Structural Design
Load Requirements:
The design load shall be ≥ 1.5 times the weight of the largest beam segment (A calculation document shall be provided, including the combined working conditions of the weight of concrete, construction live load, wind load, etc.).
The anti-overturning safety factor shall be ≥ 2.0, the elastic deformation shall be ≤ L/1000, and the maximum deformation shall not exceed 20mm (L is the cantilever length).
Material Standards:
Main Truss: Q345B steel with a thickness of ≥ 12mm, and the welds shall comply with Grade I standard of GB/T 3323-2005.
Hanger Rod: 40Cr alloy steel with a tensile strength of ≥ 980MPa, and a third-party flaw detection inspection is required.
Functional System
Walking System:
Hydraulic synchronous propulsion, with a walking speed of ≤ 0.5m/min and a positioning accuracy of ± 3mm.
Be equipped with an anti-overturning device (such as a mechanical self-locking mechanism).
Formwork System:
Adjustable formwork to adapt to changes in the beam height.
The panel shall adopt a 5mm-thick hot-rolled steel plate (with surface polishing treatment).
Safety Requirements
Set up a fully enclosed protective platform (including a fall prevention net and a safety passage).
II. Technical Requirements for the Design of the 0# Block Formwork
Structural Design
Bearing Capacity:
Meet the maximum lateral pressure of concrete (calculated according to 60kN/m²) + construction dynamic load (2.0kPa).
Overall Stiffness Requirements: The deflection shall be ≤ L/500 (L is the span of the formwork).
Modular Design:
Assemble in blocks, and the weight of a single block shall be ≤ 1.5 tons (convenient for installation by a tower crane).
Be equipped with a quick disassembly and assembly interface (bolted connection, welding is prohibited).
Precision Control
Installation Error:
The axis deviation shall be ≤ 3mm, and the elevation deviation shall be ± 2mm.
The joint misalignment shall be ≤ 1mm, and sealant treatment shall be carried out to prevent grout leakage.
Pre-camber Setting:
Preset the reverse camber according to the requirements of the design drawings (A formwork adjustment calculation document shall be provided).
Compatibility Requirements
The position of the embedded parts shall match the anchor points of the suspended bracket (the error shall be ≤ 5mm).
The formwork support frame shall not affect the installation space of the suspended bracket.
III. General Technical Requirements
Design Documents:
Provide a full set of drawings (CAD + 3D model) and a finite element analysis report (ANSYS/MIDAS).
Specify the anti-corrosion scheme (hot-dip galvanizing ≥ 80μm or epoxy zinc-rich primer + polyurethane topcoat).
Acceptance Standards:
Conduct a 1.2-fold load test before leaving the factory (no deformation after holding the load for 24 hours).
Conduct on-site trial assembly and acceptance (signed and ed by the supervision unit).
Supporting Services:
Provide on-site installation guidance and operation training.
The emergency repair response time shall be ≤ 12 hours.
IV. Response to Special Working Conditions
Wind Resistance Design: The suspended bracket is allowed to be constructed under a wind force of Grade 8, and it shall be automatically locked when the wind force reaches Grade 12.
V. Design Basis Standards
Category Applicable Standard
Steel Structure GB 50017-2017
Welding Process JB/T 3223-2017
Construction Safety JTG F90-2015
Hydraulic System ISO 4413:2010
Matters Needing Attention
l The bidder shall carry out a special adaptation design for the bridge alignment (vertical curve, horizontal curve).
l If new materials (such as carbon fiber components) are used, a durability test report shall be provided.
l If it is necessary to further refine a certain part (such as the parameters of the hydraulic system, the material comparison of the formwork panel), please supplement specific requirements.
l Standardization of Technical Parameters
The suspended bracket shall indicate key technical indicators such as the design load (≥ 2000kN) and the walking mode (hydraulic/mechanical).
The pier column formwork shall specify requirements such as the material (Q235B steel plate), plate thickness (≥ 6mm), and the number of turnover times (≥ 50 times).
l Visualization of Acceptance Standards
The flaw detection standard of the 0# bracket shall be clearly specified (the UT detection ratio shall not be less than 20%).
Attach the template of the equipment factory-out inspection record form (including key dimension detection items) and key detection items.