Slurry control bolt sleeve process

According to years of construction experience, the length of the rectangular groove in the radial direction is easy to ensure the installation accuracy of the pre-embedded bolt sleeve, and the bottom plate of the silo is thick aluminum-magnesium alloy, and the bottom plate is drilled and then paired and welded into a ring bottom plate. Therefore, the radial welding deformation of the silo floor is much larger than the circumferential welding deformation. It is recommended that the design unit adopts the original design of the rectangular groove with the longitudinal direction as the radial direction, and the gap between the rectangular groove and the anchor bolt in the circumferential direction is a left and right adjustment margin of 0, which can ensure the deviation of the circumferential direction of the silo body. Meet the construction requirements. Measuring instrument error. In order to reduce the deviation, a total station with high precision and validity during the inspection is used for positioning. The construction technical plan is based on the above problems. On the basis of drawing on the experience of other large-base pre-embedded bolts, combined with the characteristics of the pre-embedded bolt sleeves of the silo foundation, after several detailed analysis and demonstrations, the construction work of the pre-embedded bolt sleeves has been prepared. The guidebook implements quality pre-control for each pre-embedded bolt sleeve to guide the whole process of pre-embeding bolt sleeve construction.

The pre-embedded bolt sleeve is calibrated by means of fine adjustment of the top wire to make the positioning of the pre-embedded bolt sleeve more precise. Process control in construction According to the concrete construction plan, the top column, beam and plate of the storage silo are cast once. The individual silo design has a pre-embedded bolt sleeve. In order to further control the positioning accuracy of the bolt sleeve, the following aspects are obtained. Start with the overall process control of the bolt sleeve construction. The stability and flatness of the pre-embedded screw-check sleeve fixed formwork steel frame pre-embedded bolt sleeve fixed formwork steel frame is directly related to the installation and positioning accuracy of the pre-embedded bolt sleeve. After many arguments and accurate calculations, a bolt-sleeve fixed formwork steel frame was designed, and each silo was designed with a fixed formwork steel frame. A fixed formwork steel frame was required, and a detailed production drawing was drawn. During the production, the steel platform is staked according to the size of the fixed formwork steel frame, and the position of the pre-embedded bolt sleeve is accurately drawn. The welding deformation and shrinkage of the fixed formwork steel frame should be considered during the production. The size of the fixed formwork steel frame should be properly enlarged. After the spot welding of all the components is completed, the anti-deformation measures are taken and strengthened, and then welded, as shown in the figure. Fixed formwork steel frame bolt sleeve positioning plate radial force 沂扒 沂扒 夕 梁 beam reinforced bar fixed formwork steel frame diagram bolt sleeve and hole plate position in order to improve the stability of the fixed formwork steel frame, the main ring beam uses work. Each pre-embedded bolt sleeve is reinforced with a root 560 rebar connection to form a stable structure between the entire pre-embedded bolt sleeve and the fixed formwork steel frame.

Since the base reinforcement is not allowed to be welded, all connections to the base reinforcement are tied. It should be noted that the installation, inspection and acceptance of bolts must use the steel ruler that has passed the same check and the following is the case of the directional drilling of the Yongding River in the second line of Shaanxi-Jingjing. The cross-section of the Yongding River through the geological conditions is shown in the table according to the above geological conditions. According to the analysis, about 11 long pipelines are located in the middle sand layer. At the same time, due to drought and little rain in Hebei Province in recent years, a natural underground funnel is formed, which increases the possibility of collapse and construction is very difficult. In response to these situations, we have taken a variety of measures to ensure a successful pass. The construction response measures are first checked from the equipment, and the construction equipment used is thoroughly inspected. At the same time, all the drilling tools are tested for non-destructive testing to ensure reliable performance of the equipment and tools during the drilling process. According to the parameters provided by the design and the on-site reconnaissance situation, the technical personnel will propose a specific implementation plan. After the expert group's argumentation, it is decided to first construct according to the normal method, and after the concrete pouring of the silo foundation is completed, the pre-buried The coordinates and elevation of the bolt sleeve are actually measured. As a result, except for the coordinate deviation of the root bolt sleeve, all other bolt sleeves meet the design requirements, and the elevation error is also controlled within. Through careful pre-planning and careful construction, the pre-embedded bolt sleeve construction achieved the expected results and met the design requirements. It was well received by the representatives of the German silo company, the owner and the supervision company.

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