Foundation pit exposed for a long time, will cause to a certain depth of foundation pit excavation, subsoil swell up phenomena will be shown after the release of the pressure, rainfall or row to pit water leads to a pit soil softening, the palisade structure of passive resistance is reduced, so that the pit displacement of retaining structures and cause around the settlement and deformation of foundation pit, endanger the safety of the surrounding buildings and structures.
Details >The supporting cracking of foundation pit is divided into enclosure cracking and supporting structure cracking.
Details >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 >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 >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 >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 >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 >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 >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.
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