How to deal with foundation pit retaining crack
The supporting cracking of foundation pit is divided into enclosure cracking and supporting structure cracking.
Details >Composition and arrangement of foundation pit support plane system
Under normal circumstances, the plane support system should be composed of waist beam, horizontal support and column three parts. The horizontal support should have strong integrity and plane stiffness, so that the force transmission of each part of the support is reliable.
Details >Diaphragm wall construction procedure
1. Divide the unit slot segment; 2. Build a guide wall; 3, trough; 4. Clear the trough; 5. Installation of slot joint pipe; 6, the production and installation of steel cage; 7. Install the catheter; 8. Pour concrete
Details >Shanghai strong participation in the town of outer gang staff talent contest
In order to celebrate the 100th anniversary of the founding of the Communist Party of China, the Federation of Trade Unions of Waigang Town, Jiading District, Shanghai, held the "Art Exhibition Style Pursue Dream 2021" Waigang Town staff talent Competition in the Wujia neighborhood center. A total of 29 units of employees actively participated in the activity.
Details >Several common soil rock bolt tests
The main purpose of soil bolt test is to determine the pull-out ability of anchor solid in soil, so as to verify the rationality of soil bolt design and construction technology, or to check the quality of soil bolt. There are two kinds of soil bolt test: basic test and acceptance test. Creep test should also be carried out on the wrong rod in soft soil.
Details >Introduction to the technology of ready-mixed fluidized solidified soil
The ready-mixed fluidized solidified soil is a mixture of various discarded ballast soil, soil hardener and water at a certain ratio and reaches a certain performance index. Its slump is 80mm ~ 220mm and its unconfined compressive strength reaches &NBSP. 0.4 ~ 15 mpa.
Details >Soil-cement gravity wall support structure
Cement-soil deep mixing method is through the special machinery - all kinds of deep mixer, along the depth of the curing agent (cement slurry or cement powder, plus a certain mixing agent) and the foundation soil forced in situ mixing to form cement-soil pile or cement soil block reinforcement foundation method.
Details >Introduction of drilling pile technology and preparation for construction
A, characteristics of bored piles, the construction technological process of three 1, construction technology, construction preparation, ready to play before, construction units should be reconnaissance construction site, familiar with engineering drawings (pile layout, structure design of pile, reinforcing cage production drawings, etc.), geotechnical engineering investigation data and the necessary hydrogeological data, the necessary research.
Details >The construction of undisturbed soil taking concrete cast-in-place pile with full protective simplicity adopts dual-power drill with built-in spiral blades to drill down and cut the soil to form the pile diameter. At the same time, the undisturbed soil in the protective simplicity is removed, and the concrete is inserted into the steel cage after being pressed and the protective simplicity is removed to form reinforced concrete piles. It can also use the pipe rolling machine to rotate and press the steel casing (guard cylinder), grab and other equipment to take out the hole forming technology of the soil inside the guard, install the steel cage after the hole forming, and fill the concrete of the pile body. It is suitable for clay soil layer, silt soil, sandy soil and high groundwater level, high confined water formation.
Details >The main purpose of soil bolt test is to determine the pull-out ability of anchor solid in soil, so as to verify the rationality of soil bolt design and construction technology, or to check the quality of soil bolt. There are two kinds of soil bolt test: basic test and acceptance test. Creep test should also be carried out on the wrong rod in soft soil.
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.