A device and method for adjusting the concentricity of a pre-stressed anchor assembly

Abstract

The application relates to a device for assisting the adjustment of the concentricity of a prestressed anchor bolt assembly, which solves the problem that the current adjustment of the concentricity is complicated, time-consuming and laborious and cannot quickly and effectively realize the adjustment of the concentricity of the prestressed anchor bolt assembly. The device comprises multiple groups of pulling and fixing devices, the pulling and fixing device comprises a steel wire rope, a line tightener and a fixed steel drill, and the upper anchor plate is connected with the fixed steel drill through the steel wire rope and the line tightener. Through the application of the device, the adjustment of the concentricity of the anchor bolt assembly can be quickly realized. If the conventional method is adopted, 4 workers, 1 automobile crane and 4 hours are needed, and after the new scheme is adopted, the adjustment of the concentricity can be completed within 30 minutes. Compared with the conventional method, the new scheme has the advantages of small investment, high efficiency, high speed, cost saving and reduced construction difficulty.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of prestressed anchor assembly concentricity adjustment, in particular to a device for assisting in adjusting the concentricity of a prestressed anchor assembly and a construction method. BACKGROUND

[0002] In recent years, with the increasing demand for electricity, clean energy such as hydropower, wind power and nuclear power has been widely popularized, and more and more large-scale power generation facilities have emerged. In this process, prestressed anchors are used. At present, the methods for adjusting the concentricity of prestressed anchor assemblies mainly include installing positioning keels and using cranes to assist in adjustment. The above methods are complicated, time-consuming and labor-intensive, and cannot quickly and effectively adjust the concentricity of prestressed anchor assemblies. SUMMARY

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present application provides a device for assisting in adjusting the concentricity of a prestressed anchor assembly and a construction method thereof, which effectively solves the problem of complicated, time-consuming and labor-intensive concentricity adjustment construction and the inability to quickly and effectively adjust the concentricity of prestressed anchor assemblies.

[0004] To achieve the above purpose, the technical scheme of the present application is as follows: a device for assisting in adjusting the concentricity of a prestressed anchor assembly, comprising a plurality of tensioning devices, the tensioning device comprising a steel wire rope, a line tightener and a fixed steel drill, the upper anchor plate and the fixed steel drill being connected by the steel wire rope and the line tightener.

[0005] Preferably, the number of steel wire ropes is four, three of which are distributed in a 120° angle, and the fourth steel wire rope is arranged in the opposite direction of the offset direction of the anchor assembly.

[0006] Preferably, the number of fixed steel drills is four.

[0007] Preferably, the number of line tighteners is four, and the steel wire rope and the fixed steel drill are connected by the line tightener.

[0008] A construction method for assisting in adjusting the concentricity of a prestressed anchor assembly, comprising the following steps:

[0009] S1, install the prestressed anchor assembly according to the requirements, and after installation, determine the positions of the first three tensioning devices according to the actual site, so that the positions of the tensioning devices are staggered with the wind turbine foundation box, pedestrian passageway and drainage passageway, etc.

[0010] S2, according to the determined positions, the measuring personnel use a high-precision total station to position the connection points of the tensioning devices on the anchor plate on the foundation, and the three points are evenly distributed at an angle of 120°.

[0011] S3, according to the anchor plate defined out of the fastening device connecting point, using total station instrument in the foundation pit periphery defines the fixed steel drill position, ensures three fixed steel drill position and the anchor plate three steel bar connecting point position one to one correspondence;

[0012] S4, according to the steel drill position, three steel drills are punched into the foundation periphery soil, and the steel drills are ensured to be safe and stable and have certain uplift resistance;

[0013] S5, three steel wires are connected with the upper anchor plate at one end and connected with the fixed steel drill at the other end using a wire tightener according to the determined position;

[0014] S6, after the steel wire connection is completed, the measuring personnel measures the concentricity of the anchor plate, and the three steel wires are pulled tight in different degrees according to the measurement result;

[0015] S7, the measuring personnel re-measures the concentricity of the upper and lower anchor plates, finds out the overall offset direction of the anchor bolt cage, and uses a total station instrument to define the steel wire connection position on the upper anchor plate and the fourth fixed steel drill position on the foundation pit periphery according to the opposite direction of the overall offset of the anchor bolt cage;

[0016] S8, the fourth steel drill is punched into the point position determined, and then the fourth steel wire is connected with the upper anchor plate connection point at one end and connected with the fourth steel drill at the other end using a wire tightener;

[0017] S9, after the fourth steel wire connection is completed, the steel wire is slowly pulled tight, and the measuring personnel continuously measures the concentricity of the anchor plate during the tightening process of the steel wire, and stops the tightening of the steel wire until the concentricity meets the requirements;

[0018] S10, after the adjustment of the anchor plate concentricity is completed, the connection of all steel wires is checked to ensure that all steel wires are safely and effectively tightened.

[0019] Preferably, the following steps are further included: after the fan foundation steel bar installation is completed, the anchor plate concentricity is re-measured before the fan foundation concrete pouring, and if the anchor plate concentricity is found to be offset, the steel wire in the opposite offset direction is adjusted in time to make the anchor plate concentricity meet the requirements.

[0020] Through the application of the present application, the adjustment of the concentricity of the anchor bolt assembly can be quickly realized, and if the conventional method is used for adjustment, 4 persons, 1 automobile crane and 4 hours are needed, and after the new scheme is used, the adjustment of the concentricity can be completed within 30 minutes, compared with the conventional method, the investment is small, the efficiency is high, the speed is fast, the cost is saved, and the construction difficulty is also reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is a structure schematic view of the fastening device of the present application;

[0022] Fig. 2This is a schematic diagram of the planar structure of the tensioning device of the present invention. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner, and therefore only show the components relevant to the invention.

[0024] like Figs. 1-2 As shown, a device for adjusting the concentricity of an auxiliary prestressed anchor bolt assembly includes multiple sets of tensioning devices. Each tensioning device includes a wire rope 2, a tensioner 3, and a fixing steel rod 4. The upper anchor plate 1 and the fixing steel rod 4 are connected by the wire rope 2 and the tensioner 3.

[0025] The number of steel wire ropes 2 is four, of which three steel wire ropes 2 are distributed in a 120° angle, and the fourth steel wire rope 2 is arranged in the opposite direction to the offset direction of the anchor bolt assembly.

[0026] The function of wire rope 2 is to connect the anchor plate 1 and the fixing steel rod 4 on the anchor bolt assembly.

[0027] The number of the fixing steel rods 4 is four.

[0028] The arrangement of the fixing steel rod 4 matches the position of the wire rope 2, and its function is to fix it.

[0029] There are four tensioners 3, and the wire rope 2 and the fixed steel rod 4 are connected by tensioners 3.

[0030] The function of tensioner 3 is to adjust the direction of the anchor bolt assembly.

[0031] A construction method for adjusting the concentricity of an auxiliary prestressed anchor bolt assembly includes the following steps:

[0032] S1. Install the prestressed anchor bolt assembly as required. After installation, determine the position of the first three tie devices according to the actual site conditions, so that the tie devices are staggered from the wind turbine foundation transformer box, pedestrian passage, drainage channel, etc.

[0033] S2. Based on the location determined on site, the surveyors used a high-precision total station to locate the connection point of the fastening device on the anchor plate 1 on the foundation. The three points were evenly distributed at a 120° angle.

[0034] S3. Based on the connection points of the fastening device determined by the upper anchor plate 1, use a total station to determine the positions of the fixed steel rods 4 around the foundation pit, ensuring that the positions of the three fixed steel rods 4 correspond one-to-one with the positions of the three steel bar connection points of the upper anchor plate 1.

[0035] S4. According to the determined positions of the steel rods, drive three steel rods into the soil around the foundation, ensuring that they are safe, stable, and have a certain pull-out resistance.

[0036] S5, the three steel wire ropes 2 are connected with the upper anchor plate 1 at one end and connected with the fixed steel pegs 4 at the other end by using the wire tightener 3 according to the determined positions;

[0037] S6, after the connection of the steel wire ropes 2 is completed, the anchor plate concentricity is measured by the measurer, and the three steel wire ropes 2 are pulled tight in different degrees according to the measurement results;

[0038] S7, the upper and lower anchor plate concentricity is re-measured by the measurer, the overall offset direction of the anchor bolt cage is found out, the steel wire rope 2 connection position is determined on the upper anchor plate 1 in the opposite direction of the overall offset direction of the anchor bolt cage by using the total station, and the position of the fourth fixed steel peg 4 is determined on the pit periphery;

[0039] S8, the fourth steel peg is driven into the determined point, and then one end of the fourth steel wire rope 2 is connected with the upper anchor plate 1 connection point, and the other end is connected with the fourth steel peg by using the wire tightener 3;

[0040] S9, after the connection of the fourth steel wire rope 2 is completed, the steel wire rope 2 is slowly pulled tight, and the anchor plate concentricity is continuously measured by the measurer during the tightening of the steel wire rope 2, and the tightening of the steel wire rope 2 is stopped until the concentricity meets the requirements;

[0041] S10, after the adjustment of the anchor plate concentricity is completed, the connection of all the steel wire ropes 2 is checked to ensure that all the steel wire ropes 2 are safely and effectively tightened.

[0042] Further comprising the following steps: after the completion of the fan foundation reinforcement installation and before the fan foundation concrete pouring, the anchor plate concentricity is re-measured, and if the anchor plate concentricity is found to be offset, the steel wire rope 2 in the opposite direction of the offset is adjusted in time to make the anchor plate concentricity meet the requirements.

[0043] The second phase project of the hall wind power plant is located in Xingan County, Guilin City, Guangxi Zhuang Autonomous Region, the total installed capacity of the project is 80MW, 20 wind turbines with a single machine capacity of 4W are included, and the fan foundation adopts the prestressed anchor bolt assembly form, and the prestressed anchor bolt assembly is installed, three fixed steel pegs 4 are arranged outside the pit excavation side, the fixed steel pegs 4 are uniformly arranged at an angle of 120° along the pit periphery, after the steel peg arrangement is completed, the upper anchor plate 1 is connected with the fixed steel pegs 4 by using three steel wire ropes 2 and a wire tightener 3, the connection is completed, the wire tightener 3 is used for pre-tightening, the high-precision total station is used for re-measuring the concentricity, the offset direction of the assembly is found out according to the re-measuring results, the fourth pulling device is arranged in the opposite direction, and the concentricity is adjusted by using the fourth pulling device.

[0044] After the anchor bolt assembly is installed, three tensioning devices are arranged in the form of 120° angle on the upper anchor plate 1, and the fourth tensioning device is arranged in the direction opposite to the offset direction of the assembly, and the concentricity is adjusted, the three tensioning devices are first fastened, and the fourth tensioning device is used to adjust the offset direction, so that the concentricity can be quickly adjusted.

[0045] The application can realize the quick adjustment of the concentricity of the prestressed anchor bolt assembly, the use method is convenient, manpower and material resources can be saved, it is safe and reliable, fast, and construction cost is saved.

[0046] The embodiments are only examples for clearly illustrating the application, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. All the embodiments cannot be enumerated here, and the obvious changes or variations derived therefrom are still within the protection scope of the application.

Claims

1. An apparatus for assisting in adjusting the concentricity of a pre-stressed anchor assembly, characterized by, The device comprises a plurality of sets of fastening devices, the fastening device comprises a steel wire rope, a wire tightener and a fixed steel drill, the upper anchor plate is connected with the fixed steel drill through the steel wire rope and the wire tightener; the number of the steel wire ropes is four, three of which are distributed in a 120° angle form, and the fourth steel wire rope is arranged in the opposite direction of the offset direction of the anchor bolt assembly; The number of the fixed steel drills is four; The number of the wire tighteners is four, and the wire tightener is used to connect the steel wire rope and the fixed steel drill.

2. A construction method using the device in claim 1, comprising the following steps: S1, installing the prestressed anchor bolt assembly according to requirements, and after the installation is completed, determining the positions of the first three fastening devices according to the actual site of the scene, so that the positions of the fastening devices are staggered and arranged with the fan foundation box, the pedestrian passage and the drainage passage; S2, according to the determined positions, a surveyor uses a high-precision total station to position the fastening device connection points on the anchor plate on the foundation, and three points are evenly arranged according to a 120° angle; S3, according to the fastening device connection points positioned by the upper anchor plate, the total station is used to position the fixed steel drill positions around the foundation pit, so as to ensure that the positions of the three fixed steel drills correspond to the positions of the three connection points of the upper anchor plate one by one; S4, according to the determined steel drill positions, the three steel drills are driven into the soil around the foundation, and the three steel drills are ensured to be safe and stable and have a certain anti-pulling force; S5, according to the determined positions, one end of the three steel wire ropes is connected with the upper anchor plate, and the other end is connected with the fixed steel drill using the wire tightener; S6, after the connection of the steel wire ropes is completed, a surveyor measures the concentricity of the anchor plate, and according to the measurement result, the three steel wire ropes are pulled tight to different degrees; S7, the surveyor re-measures the concentricity of the upper and lower anchor plates, finds the overall offset direction of the anchor bolt cage, and according to the opposite direction of the overall offset direction of the anchor bolt cage, the total station is used to position the steel wire rope connection positions on the upper anchor plate and to position the fourth fixed steel drill position around the foundation pit; S8, the fourth steel drill is driven into the determined point, one end of the fourth steel wire rope is connected with the upper anchor plate connection point, and the other end is connected with the fourth steel drill using the wire tightener; S9, after the connection of the fourth steel wire rope is completed, the steel wire ropes are slowly pulled tight, the surveyor continuously measures the concentricity of the anchor plate during the tightening process, and the tightening is stopped until the concentricity meets the requirements; S10, after the adjustment of the concentricity of the anchor plate is completed, all the steel wire rope connections are checked to ensure safety, tightness and effectiveness.

3. The construction method according to claim 2, characterized in that, Further comprising: After the installation of the steel reinforcement of the fan foundation is completed and before the pouring of the concrete of the fan foundation, the concentricity of the anchor plate is re-measured, and if the offset is found, the steel wire rope in the opposite direction of the offset is adjusted in time to make the concentricity meet the requirements.

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