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: 20 Dec

Key points of SMW construction supervision control

Key points of SMW construction supervision and control: 1. Before construction, check the SMW construction scheme, machines, equipment, gauges and inspection, and require the construction unit to seriously disclose the safety technology. 2. Test the technical parameters, determine the mix ratio, and pass the retest of the license, warranty and qualification certificate of the finished and semi-finished products of raw materials. The supplier shall provide inspection report of H-beam steel.
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: 18 Dec

Structure of prefabricated deep foundation pit supporting system

The steel support structure system of prestressed fish-belly foundation pit should be composed of horizontal support structure and vertical support structure. The horizontal support structure shall include counterbrace, Angle brace, prestressed fish belly beam, waist beam and connecting parts, etc. The vertical support structure shall include the column (column pile) and the connector.
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: 16 Dec

Introduction of prefabricated deep foundation pit supporting technology

The assembly type deep foundation pit supporting technology has large overall stiffness, light weight, quick and convenient installation and removal, reusable, no construction waste, green and energy saving, can provide open construction space, make the excavation, soil transport and underground structure construction convenient, compared with the traditional support, can reduce the cost of more than 20%. The construction period of installation, demolition, excavation and underground structure has been shortened by more than 40%.
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: 14 Dec

Prefabricated deep foundation pit supporting technology

Prestressed fish-belly steel bracing for deep foundation pit is a kind of structural system in which prestress controls the force and deformation of retaining structure of foundation pit. It is composed of steel members assembled by bolts.
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: 13 Dec

The water stop curtain needs to enter the moderately weathered rock strata. How to construct the double-wheel milling?

In the CSM (dual-wheel milling soil-cement mixing wall) method, the conventional dual-wheel milling maximum power is 330& NBSP; KW, the maximum working pressure is 300&NBSP; Bar can generally be applied in soft soil layer, sand layer and strong weathering rock, but it cannot be applied in the face of moderate weathering rock. If there is a project that requires the CSM to enter the middle weathering rock, there must be very few construction units and construction equipment to undertake this task. The third company of China Construction Bureau II encountered such a difficult problem in the CSM engineering of Block D of Nanjing Binjiang Headquarters Base No.2014G34 Project.
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: 12 Dec

Preparation and regulations for construction of reinforced composite piles

Before the construction of the reinforced composite pile, the pile forming process test shall be carried out, and the number shall not be less than 3. When the pile quality cannot meet the design requirements, it should be tested again after adjusting the parameters related to design and construction. The allowable deviation of each single pile position in the rigid composite pile should be 10mm soil, the allowable deviation of the vertical degree of the elastic composite pile should be 1%, and the allowable deviation of the vertical degree of the elastic composite pile, flexible and rigid composite pile and ternary composite pile should be 0.5%.
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: 10 Dec

Construction regulations and advantages of reinforced composite piles

According to the requirement of design pile diameter, cement-soil mixing pile is formed in the process of grouting. The prestressed concrete pipe pile implanted into the cement soil after mixing has the advantages of convenient construction and good economic benefits. It has the following advantages:
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: 08 Dec

SMW construction inspection and acceptance

The INSPECTION ITEMS AND technical INDEXES of raw materials such as cement and admixture used in SMW construction slurry mixing should meet the design requirements and relevant national standards. Check quantity: Check by batch. Inspection method: Check product certificate and retest report.
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: 06 Dec

SMW construction H - section steel insertion and removal method

The water-cement ratio is generally 1.8 when the SMW pile is inserted into the H-shaped steel. At the same time, it is required that the hanging bars should be set on the top of the H-shaped steel. When the H-shaped steel is inserted, it is placed on the positioning channel steel to control the top elevation of the H-shaped steel. When the section steel is in place and does not sink, it is not necessary to sling.
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: 04 Dec

SMW construction preparation

SMW construction equipment 1, triaxial soil-cement mixing pile construction should according to the geological conditions and surrounding environment conditions, the depth of pile, pile diameter, choose a different form and power of the three-axis mixing pile machine, performance parameters of the supporting pile frame should match the blender pile depth, drill pipe and the agitating vane structure should satisfy the cement and soil in the process of pile fully mixing.
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Shanghai QiangJin Foundation Engineering Co., Ltd.

Tel:400-100-2850

Address:No. 289, Huixian Road, Jiading District, Shanghai

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