Integral built-in process for groups of anchor bolts

Abstract

The invention discloses an integral embedded method for a group of anchor bolts. The method comprises the following steps: after assembled lower positioning plates are fixed on a steel bracket in a foundation trench, the lower ends of the embedded bolts are fixedly connected with the lower positioning plates, and upper positioning plates are correspondingly installed on the embedded anchor bolts;steel pipe cat anchors are arranged on the periphery of the foundation trench to adjust the axial line positions of the embedded bolts, concrete is poured into the foundation trench, and after the concrete pouring is accomplished, the axial line positions of the embedded anchor bolts are adjusted. By adopting the method, the bracket and the ring-shaped positioning steel plate can be processed in a plant in advance, few construction site and little operational sequence time are occupied, the on-site splicing can be accomplished by only a spanner tool, the operational sequence is simple, the conventional on-site splicing time is saved, not only the construction speed is greatly accelerated, simultaneously the installation precision is enhanced, the engineering embedded bolt detection indicates that the permissible accuracy error for the embedded bolt installation is above the requirement of the national regulation, and the qualification rate of the engineering large-scale embedded anchor bolt can be up to 100 percent.

Description

technical field [0001] The invention relates to a foundation construction method for civil engineering equipment, in particular to an integral pre-embedding method for group anchor bolts. Background technique [0002] Pre-embedded bolts are a common construction project in industrial buildings. According to the function of pre-embedded anchor bolts, they can be divided into steel structure column anchor bolts, fixed track anchor bolts, equipment installation anchor bolts, etc. , The common pre-embedded installation methods and characteristics of anchor bolts are: [0003] (1) Direct burying method of anchor bolts: This method adopts the method of welding and fixing the bolts and steel bars one by one. The construction operation efficiency is low, the bolt position cannot be adjusted once it is determined, and the positioning accuracy is poor. "Secondary Bias" cannot be corrected; [0004] (2) Pre-embedding method of positioning template: the upper part of the bolt is fixed...

AI Technical Summary

Problems solved by technology

[0003] (1) The direct burial method of anchor bolts: this method adopts welding and fixing the bolts and steel bars one by one, the construction operation efficiency is low, the bolt position cannot be adjusted after being determined once, the positioning accuracy is poor, and the " Secondary deviation" cannot be corrected;

[0004] (2) Pre-embedding method of positioning formwork: the upper part of the bolt is fixed on the foundation formwork with square wood or positioning formwork, and the lower part is tied with steel bars and fixed by electric welding. This pre-embedding method uses a lot of wood and positioning formwork, and is not suitable for larger structures. Pre-embedded construction of large concrete components and large-scale equipment;

[0007] For the overall pre-embedding of anchor bolts such as large equipment, large towers and tank structures, due to the large bottom area, the large number of anchor bolts, and the large distance between bolts, it is difficult to manufacture, install and adjust the integral steel bracket. The overall positioning control of the equipment anchor bolt group is relatively complicated, and the relative accuracy of each individual or single group of bolts is difficult to control, so it is not suitable for the above-mentioned methods of direct burial, pre-embedded positioning templates, fixed steel brackets, and direct placement of equipment bases and other methods

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