scholarly journals Study on the technology of grouting and reinforcing the foundation of a railway bridge above shallow old mine goaf

2018 ◽  
Vol 169 ◽  
pp. 01041
Author(s):  
Hui-Quan Sui ◽  
Chun-Yuan Bait
Keyword(s):  
Fast Track ◽  
Construction Technology ◽  
Construction Site ◽  
Railway Bridge ◽  
Foundation Treatment ◽  
Pressure Grouting ◽  
Dip Angle ◽  
Bridge Foundation ◽  
The City ◽  
Design Construction

The city fast track railway bridge studied in this paper is located above an old mined out area. There is a 1500m2 underground goaf in the construction site with a depth of 30.8~53.2m, the seam thickness is 2.0~2.5m and the dip angle is 50~63 degrees. Although the mine has been abandoned for many years, there are still a lot of underground cavities. Collapse pits occurred on the surface occasionally till this day, especially during the rainy season. In order to make the design safe and reliable, drilling pressure grouting technique is proposed to fill and reinforce the foundation of the site. Proposed technique is tested by several experiments in simulated underground mined out area for the foundation treatment. The technical design, construction technology, grouting and reinforcement effect of the project are studied and summarized. The results of the experiment showed a stable and safe bridge foundation has been achieved. The proposed technique was then applied to on site experiment and pasted all tests.

Treatment of Weak Foundation Based on the Cast-in-Place Expanded Pile of Construction Waste

2011 ◽  
Vol 243-249 ◽  
pp. 2759-2761
Author(s):  
Hua Qiang Liu ◽  
Xiao Yi Fan
Keyword(s):  
Mechanism Design ◽  
Raw Materials ◽  
Social Benefits ◽  
Construction Technology ◽  
Construction Waste ◽  
Foundation Treatment ◽  
Dynamic Replacement ◽  
The Cost ◽  
Design Construction

There were better economic and social benefits which the construction wastes were the raw materials of weak foundation treatment. The cast-in-place expanded piles of construction waste showed the advantages of the dynamic replacement and compaction replacement. In the paper, the mechanism, design, construction technology and inspection of weak foundation treatment were studied. The result showed that the cast-in-place expanded piles of construction waste not only could save the cost in the waste transportation, but also decrease the cost in the foundation reinforcement and avoid the land contamination.

scholarly journals Sustainable Recovery of Architectural Heritage: The Experience of a Worksite School in San Salvador

2022 ◽  
Vol 14 (2) ◽  
pp. 608
Author(s):  
Silvia Santini ◽  
Vittoria Borghese ◽  
Mario Micheli ◽  
Erick Orellana Paz
Keyword(s):  
Development Cooperation ◽  
Construction Site ◽  
Architectural Heritage ◽  
San Salvador ◽  
Sustainable Implementation ◽  
Contextual Framework ◽  
Late Nineteenth ◽  
Sustainable Recovery ◽  
The City ◽  
Design Construction

This paper presents the experience of both interdisciplinary and sustainable implementation of an educational construction site for the recovery of the architectural heritage in Central America. Rey Prendes House is representative of one hundred and forty-five houses made of wood, stamped steel sheet, and deployé that are located in the historical center of San Salvador. Its origin is linked to historical events, such as the strong migration of foreigners to El Salvador in the late nineteenth and early twentieth century, the presidential decrees that encouraged the reconstruction of the city with anti-seismic materials as a result of the earthquakes of 1873 and 1917. More recently, since 2017, Rey Prendes House has been included in the project funded by the Italian Agency for Development Cooperation. In this paper, the phases of the survey are documented with both materials and degradation analyses, the new design construction with BIM technology for the organization of the educational construction site, the creation of offices and laboratories for restoration and treatments of timber and metal details. Moreover, the study provides a contextual framework with the aim of describing the policies and the projects implemented, highlighting the adopted strategies, the results achieved, and outlining the path followed towards the design solutions for sustainable rehabilitation relating to future use.

Design & Construction of WanZhou Yangtze River Railway Bridge

2008 ◽  
Vol 17 (1) ◽  
pp. 616-617
Author(s):  
Xue-wei DUAN ◽  
Mu-jie LIAO
Keyword(s):  
Yangtze River ◽  
Railway Bridge ◽  
Design Construction

Oosterweel – from an underground and even underwater road infrastructure plan to an urban transformation project

2021 ◽  
Author(s):  
Luc Hellemans
Keyword(s):  
Traffic Flow ◽  
Large Scale ◽  
Good Reason ◽  
Urban Transformation ◽  
Construction Site ◽  
Successful Completion ◽  
Road Infrastructure ◽  
Living Space ◽  
The City ◽  
Made In

<p>For the coming ten years, the heart of Europe will turn into a gigantic construction site for works on one of the largest hubs of the continent: Antwerp. The Oosterweel Link is the project whereby the motorway ring around Antwerp is undergoing a metamorphosis to reinvigorate traffic flow and add living space to the City. The project had come to a standstill for several years as a result of protests by assertive citizens, but was given a second lease of life following a large-scale participation project.</p><p>To ensure its successful completion, unparalleled efforts are being made in the field and in the area of digitization. It is therefore with good reason that in Belgium the project is referred to as “the construction site of the century”.</p>

scholarly journals ANALYTICAL AND NUMERICAL METHODS FOR DETERMINING THE CARRYING CAPACITY OF A PILE BARETT ON WEAK SOILS IN DEEP PITS

2021 ◽  
Vol 17 (3) ◽  
pp. 94-101
Author(s):  
Rashid Mangushev ◽  
Nadezhda Nikitina ◽  
Hieu Le Trung ◽  
Ivan Tereshchenko
Keyword(s):  
Bearing Capacity ◽  
Numerical Test ◽  
Full Scale ◽  
Construction Site ◽  
Weak Soils ◽  
Geological Conditions ◽  
Full Scale Tests ◽  
Soil Excavation ◽  
Deep Pits ◽  
The City

The article provides an analysis of the bearing capacity of barrett piles in difficult geological conditions at a construction site in the city of Hanoi, Vietnam based on the results of analytical calculations according to Russian building codes, mathematical modeling and field full-scale tests. The paper describes a numerical test of a single barrette for Mohr-Coulomb and Hardening Soil models in the Midas GTS NX software package. The bearing capacity of a barrette in soft soils is also proposed to be determined by an analytical solution for calculating the settlement of a single pile, taking into account the unloading of the pit after soil excavation. The results of full-scale tests at the site of future construction, graphs of "load-settlement" of the barrette head from the applied vertical load and the general assessment of the bearing capacity of the barret pile by various methods are shown.

scholarly journals Research on Reliability of Straight Thread Connection of Reinforcement Cage of Bridge Foundation

2021 ◽  
Vol 248 ◽  
pp. 03064
Author(s):  
Jinhui Li ◽  
Xiaodong Shang ◽  
Minmin Yuan
Keyword(s):  
New Technologies ◽  
Practical Significance ◽  
Construction Technology ◽  
Bridge Construction ◽  
Thread Connection ◽  
Development Status ◽  
Steel Bar ◽  
Foreign Countries ◽  
Application Requirements ◽  
Bridge Foundation

With the continuous improvement of bridge construction technology in our country, although the service life of the bridge has been greatly extended, the mechanical connection technology of steel bar in the technology is still in the stage of steel bar straight thread connection, which is nearly 30 years behind that of foreign countries. According to the development status and application requirements of bridge construction in China, it is of great practical significance to explore new technologies and methods to solve the problem of insufficient strength of straight thread connection of reinforcement. In this paper, the reliability of the straight thread reinforcement connection in the bridge foundation reinforcement cage connection technology is studied as the main breakthrough point, and the main problems encountered in the application of the straight thread reinforcement connection technology in the bridge reinforcement cage connection are analyzed.

Study on Construction Technology of Drain Board for Foundation Covered with Thicker Hardpan

2014 ◽  
Vol 852 ◽  
pp. 815-818
Author(s):  
Wan Li ◽  
Ming Hui Huang ◽  
Mo Li
Keyword(s):  
Construction Technology ◽  
Land Area ◽  
Foundation Treatment ◽  
Complex Foundation

In the paper, Construction technology and equipment improvement of plastic drainage boards driven in land area are studied. Because overlying hardpan is thick in some areas, drainage plate cant be driven by common vibratory board machine. In allusion to this instance, the machine was refitted to superficial drilling holes machine, a bore was drilled and then the drainage plate was driven to deal with the foundations covered with thick hardpan. Performance of this technology is researched and explored to deal with a complex foundation treatment by reclamation silt.

Study on the Capacity Increasing and Dam Heighten of Plain Reservoirs

2013 ◽  
Vol 353-356 ◽  
pp. 2531-2536
Author(s):  
Xiu Guang Song ◽  
Zhi Dong Zhou ◽  
Hong Bo Zhang ◽  
Hong Ya Yue
Keyword(s):  
Numerical Simulation ◽  
Comparative Analysis ◽  
Site Investigation ◽  
Seepage Flow ◽  
Differential Settlement ◽  
Construction Technology ◽  
Dam Stability ◽  
The Stability ◽  
Design Construction

In order to solve the problem of differential settlement, seepage flow and stability between the new and old dam boundary in capacity increasing of the plain reservoirs, the comparative analysis on the stability of the dam slope with different methods on dealing with the new and old dam boundary was performed by numerical simulation with FLAC3D. The result shows that combining the new and old dam by using geogrid indicates superiority for reducing differential settlement, improving the dam stability and safety, etc. In the meantime, on the basis of actual site investigation and theoretical analysis, combined with the requirements of design, construction and management in capacity increasing of the plain reservoirs, the key construction technology was put forward and widely applied foreground, which can improve the quality of the construction, reduce engineering disease and provide references for capacity increasing engineering of in plain reservoirs.

scholarly journals Preamble to Special Issue

2012 ◽  
Vol 5 (2) ◽  
pp. 1-7
Author(s):  
City of Melbourne
Keyword(s):  
Construction Industry ◽  
Statistical Data ◽  
Special Issue ◽  
Sustainable Technologies ◽  
Technical Requirements ◽  
The Face ◽  
Lively Debate ◽  
The Subject ◽  
The City ◽  
Design Construction

About 15 years ago the City of Melbourne came up with a scheme that would transform completely the face and the fortunes of the city. At the time the city, like thousands of others around the globe, emptied at night as tens of thousands of commuters decamped in their cars for the suburbs. The Council's Postcode 3000 scheme, launched in 1992, outlined plans to entice residential development back into the city, through financial and technical incentives, technical advice, a review of technical requirements, research and statistical data, promotional events and publicity.It is hard now to believe -walking through the bustling streets lined with converted apartments and thriving businesses -that anyone was ever sceptical about the potential for city living Melbourne-style. The success of Postcode 3000 far exceeded even the most ambitious targets and the City of Melbourne became one of the fastest growing municipalities in the land.With its visionary new Council House 2 (CH2) building , the City of Melbourne is once again planning a lifestyle revolution. This time the subject is sustainability and the target is the construction industry. Using the CH2 office building as a living , breathing example, the Council intends to demonstrate the potential for sustainable technologies to transform the way we approach the design, construction and indeed entire philosophy of our built environment. Just as Postcode 3000 reinvented the city, the City of Melbourne wants to see the CH2 example copied , improved upon and enthusiastically taken up throughout Melbourne and far, far beyond.As before, there are a great many sceptics. The City's approach to this has been to patiently press ahead with construction of its best source of proof -CH2 itself -while actively and energetically encouraging lively debate -from the greatest enthusiasts to the harshest critics alike.

Influence of Different Ways of Foundation Treatment on the Differential Settlement of Road- Tunnel Composite Structure

2010 ◽  
Vol 168-170 ◽  
pp. 323-329
Author(s):  
Zhen Liu ◽  
Cui Ying Zhou ◽  
Wei Huang
Keyword(s):  
Composite Structure ◽  
High Strength ◽  
Differential Settlement ◽  
Natural State ◽  
Road Tunnel ◽  
Nonlinear Fem ◽  
The Road ◽  
Concrete Piles ◽  
Foundation Treatment ◽  
Pressure Grouting

In order to insure the safe and reliable road-tunnel composite structure, it is important to consider the influence of different foundation treatment ways on the differential settlement of the composite structure. Based on the nonlinear FEM, connecting with the western corridor connecting project from Shenzhen to Hong Kong in China, a numerical model has been established to estimate the settlement of the road- tunnel composite structure under three different foundation treatment ways, such as pressure grouting, PHC piles (prestressed high-strength concrete piles) and foundation in natural state. This study shows that the influence of the different foundation treatment ways on the transverse and longitudinal differential settlement of the composite structure of road-tunnel is strong. The results from this study provide a useful guideline for settlement control of other similar projects composed of tunnel and road structure.

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