Pressurized pile + steel composite steel support: Hefei Yijia Household project
This project is a large-scale home furnishing mall invested and constructed by Hefei IKEA Furniture Co., LTD. It is a local provincial and municipal key project in 2020. It is located at the intersection of Mengcheng North Road and Linquan Road, Luyang District, Hefei City. The surrounding environment is complex, with the subway station of Line 5 in the east, the subway station of Line 3 in the south, and the residential community and municipal pipeline culverts in the west.
Details >New technology of foundation pit engineering, effectively shorten 1/4 construction period
This project is a large furniture store invested and built by IKEA in Hefei, Anhui Province, which is a key project of the local province and city in 2020. The project is located at the intersection of Mengcheng North Road and Linquan Road, Luyang District, Hefei City. The surrounding environment is complex, with the subway station of Line 5 in the east, the subway station of Line 3 in the south, and the residential community and municipal pipeline culverts in the west. The proposed building has 4 floors above ground and 1~2 floors underground. The foundation pit depth is 7.2~15.2m and the area is about 19,000 square meters. The original foundation pit supporting scheme is: cast-in-place pile + high pressure rotary jet grouting pile water stop + composite steel support.
Details >Section steel composite support - Shanghai Strong fish belly beam construction preparation
(1) Determine the stacking position of steel components and the entry and exit route of construction machinery. (2) Clear construction roads and travel routes.
Details >Classification and characteristics of foundation pit
Foundation pit classification: 1. First-level foundation pit: the combination of important engineering, supporting structure and foundation structure, excavation depth > 10m, historical or modern excellent buildings, important facilities and important pipelines within the influence area of excavation shall be strictly protected;
Details >Earth-moving trestle bridge in deep foundation pit supporting technology
In order to facilitate the earthwork excavation of foundation pit, Shanghai Strong Foundation has developed three convenient earthwork excavation auxiliary platforms (earth-moving trestle) : 1. 2. Cross-supported steel platform; 3. Large steel trestle.
Details >Commonly used deep foundation pit supporting technology
Occlusal pile technology is also a kind of deep foundation pit supporting technology. In this technology, the cast-in-place pile and the mixing pile are occlusioned. Firstly, a cage type double-layer agitator is used to construct solidified soil piles, and then the undisturbed soil taking and press-pouring concrete pile machine is used to cut adjacent solidified soil piles into holes, and the press-pouring concrete is inserted into the steel cage, which has the dual role of water stop and soil retaining. The technology has the advantages of fast construction speed, low cost and little impact on the surrounding environment.
Details >Advantages of retaining technology of deep foundation pit occluding pile
Deep foundation pit retaining pile is a kind of foundation pit retaining structure, and piles are interlocked and aligned with each other. In the construction process, it can be divided into hard bite and soft bite.
Details >Section steel combination support, large working space foundation pit supporting technology.
Section steel composite support is assembled on site by precast steel components. Compared with concrete support, it does not need to wait for concrete curing period, the construction period is shorter, and the demolition is convenient, and will not produce engineering waste, and the steel components are recycled again, and the cost is relatively lower.
Details >Application of section steel composite support in deep foundation pit
Compared with the traditional concrete support, the steel composite brace-prestressed fish-belly foundation pit steel support is connected with high-strength bolts, which can be installed and disassembled quickly, and can significantly shorten the construction period. All components and materials are recycled, making them green and generally cheaper than traditional concrete supports.
Details >Introduction to the retaining of deep foundation pit
Occluding pile is A new type of pile row structure, also known as AB pile, in which two different types of piles A and B occlude each other to form A vertical continuum with the functions of retaining soil and intercepting water. The purpose is to make the drained pile not only serve as a retaining member, but also play the role of water interception, so there is no need to set up another water interception curtain. Class A pile plays the role of water interception, and class B pile mainly plays the role of support and water interception. Class A pile is generally plain concrete pile, and class B pile is reinforced concrete pile.
Details >Hong Kong airport is the biggest challenges facing the third runway construction aspect, before the project starts, sea DCM (mixing pile), land DCM (mixing pile), PVD (drain) in the sea, land gravel pile foundation treatment technology such as are for Japan, South Korea, the monopoly of international advanced technology, before and after the tender, the foreign counterparts enterprises of our country executes strict technology blockade. For this reason, the strong foundation has carried on the thorough research. After more than two years of continuous fighting day and night, countless scientific research, testing and adjustment, we have overcome the difficulties of equipment manufacturing and construction technology of PVD (drainage board) engineering ship, DCM (mixing pile) engineering ship, onshore gravel pile machine, and onshore DCM pile machine, and successfully mastered the core technology.