CN116240886A - Device and construction method for adjusting concentricity of auxiliary prestressed anchor bolt assembly - Google Patents

Abstract

A device for assisting the adjustment of the concentricity of the prestressed anchor bolt assembly solves the problems that the current concentricity adjustment construction is cumbersome, time-consuming and laborious, and the concentricity adjustment of the prestressed anchor bolt assembly cannot be quickly and effectively realized. It includes multiple sets of tensioning devices, the tensioning devices include steel wire ropes, wire tensioners and fixed steel drills, and the upper anchor plate and the fixed steel drills are connected to the wire tensioners through steel wire ropes. The application of the present invention can quickly realize the adjustment of the concentricity of the anchor bolt assembly. If the conventional method is used to adjust the concentricity, 4 people and 1 car crane are required for 4 hours. After adopting the new solution, the concentricity can be completed within 30 minutes. Compared with the conventional method, the adjustment has small investment, high efficiency, fast speed, cost saving, and thus reduces the difficulty of construction.

Description

Device and construction method for adjusting concentricity of auxiliary prestressed anchor bolt assembly

technical field

The invention relates to the technical field of concentricity adjustment of prestressed anchor bolt assemblies, in particular to a device and a construction method for assisting prestressed anchor bolt assemblies to adjust concentricity.

Background technique

In recent years, with the continuous increase of people's 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. Prestressed anchor bolts will be used in this process. At present, the methods for adjusting the concentricity of prestressed anchor bolt assemblies mainly include the installation and positioning keel method and the auxiliary adjustment of cranes. The above methods are cumbersome to construct, time-consuming and laborious, and cannot be fast and effective Realize the adjustment of the concentricity of the prestressed anchor bolt assembly.

Contents of the invention

In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a device for adjusting the concentricity of the auxiliary prestressed anchor bolt assembly and its construction method, which effectively solves the cumbersome construction of the current concentricity adjustment, which is time-consuming and labor-intensive, and cannot The problem of quickly and effectively realizing the concentricity adjustment of the prestressed anchor bolt assembly.

In order to achieve the above object, the technical solution of the present invention is: a device for adjusting the concentricity of the auxiliary prestressed anchor bolt assembly, including multiple sets of tensioning devices, the tensioning devices include steel wire ropes, wire tensioners and fixed steel brazes, and the anchors The plate and the fixed steel drill are connected with a wire tensioner through a wire rope.

Preferably, the number of the steel wire ropes is four, among which three steel wire ropes are arranged at an angle of 120°, and the fourth steel wire rope is arranged in the opposite direction to the offset direction of the anchor bolt assembly.

Preferably, the number of the fixed steel rods is four.

Preferably, the number of the wire tighteners is four, and the wire rope is connected to the fixed steel brazing rod by a wire tightener.

A construction method for adjusting the concentricity of an auxiliary prestressed anchor bolt assembly, comprising the following steps:

S1, complete the installation of the prestressed anchor bolt assembly according to the requirements. After the installation is completed, determine the orientation of the first three anchoring devices according to the actual site, so that the positions of the anchoring devices are staggered from the fan base box substation, pedestrian passages, and drainage passages;

S2, according to the location determined on site, surveyors use a high-precision total station to locate the connection point of the tensioning device on the anchor plate of the foundation, and the three points are evenly arranged at an angle of 120°;

S3, according to the connection point position of the tensioning device determined by the upper anchor plate, use the total station to determine the fixed steel brazing position around the foundation pit, to ensure that the positions of the three fixed steel brazes correspond to the positions of the three steel bar connection points on the upper anchor plate ;

S4, drive three steel rods into the soil around the foundation according to the determined steel rod positions, and ensure that they are safe, stable and have a certain pull-out resistance;

S5, according to the determined position, one end of the three wire ropes is connected with the upper anchor plate, and the other end is connected and fixed with the fixed steel brazing with a wire tensioner;

S6, after the steel wire ropes are connected, the surveyors measure the concentricity of the anchor plate, and tension the three steel wire ropes to varying degrees according to the measurement results;

S7, the surveyor retests the concentricity of the upper and lower anchor plates, finds out the overall offset direction of the anchor bolt cage, and uses the total station to determine the connection position of the wire rope on the upper anchor plate according to the opposite direction of the overall offset of the anchor bolt cage. Determine the fourth fixed steel drill position around the foundation pit;

S8, drive the fourth steel rod into the determined point, then connect one end of the fourth steel wire rope to the connection point of the upper anchor plate, and connect the other end to the fourth steel rod using a wire tensioner;

S9, after the connection of the fourth steel wire rope is completed, slowly tighten the steel wire rope. During the process of fastening the steel wire rope, the measuring personnel continuously measure the concentricity of the anchor plate, and stop the fastening of the steel wire rope until the concentricity meets the requirements;

S10, after the concentricity adjustment of the anchor plate is completed, check the connection of all wire ropes to ensure that all wire ropes are securely fastened and effective.

Preferably, the following steps are also included: re-testing the concentricity of the anchor plate after the installation of the fan foundation reinforcement and before the concrete pouring of the fan foundation. Make the concentricity of the anchor plate meet the requirements.

Through the application of the present invention, the concentricity adjustment of the anchor bolt assembly can be quickly realized. If the conventional method is used to adjust the concentricity, it needs 4 manual workers, 1 car crane, and the time is 4 hours. After adopting the new scheme, the concentricity can be completed within 30 minutes. Compared with the conventional method, the adjustment has small investment, high efficiency, fast speed, cost saving, and thus reduces the difficulty of construction.

Description of drawings

Fig. 1 is a structural schematic diagram of the tensioning device of the present invention;

Fig. 2 is a schematic plan view of the structure of the tensioning device of the present invention.

Detailed ways

The present invention is described in further detail now in conjunction with accompanying drawing. The accompanying drawings are simplified schematic diagrams, which only schematically illustrate the basic structure of the present invention, so that they only show the components relevant to the present invention.

As shown in Figure 1-2, a device for adjusting the concentricity of the auxiliary prestressed anchor bolt assembly, including multiple sets of tensioning devices, the tensioning device includes a steel wire rope 2, a wire tensioner 3 and a fixed steel drill 4, and the upper anchor plate 1 and the fixed steel drill 4 are connected with the wire tensioner 3 through the wire rope 2.

The number of said steel wire ropes 2 is four, among which three steel wire ropes 2 are arranged at an angle of 120°, and the fourth steel wire rope 2 is arranged in the opposite direction to the offset direction of the anchor bolt assembly.

The effect of steel wire rope 2 is to connect anchor plate 1 and fixed steel drill 4 on the anchor bolt assembly.

The number of the fixed steel drills 4 is four.

The arrangement of fixed steel braze 4 matches with steel wire rope 2 positions, and effect is to play fixing role.

The number of said wire tighteners 3 is four, and the wire rope 2 and the fixed steel drill 4 are connected by wire tighteners 3 .

The effect of the wire tightener 3 is to adjust the direction of the anchor bolt assembly.

A construction method for adjusting the concentricity of an auxiliary prestressed anchor bolt assembly, comprising the following steps:

S1, complete the installation of the prestressed anchor bolt assembly according to the requirements. After the installation is completed, determine the orientation of the first three anchoring devices according to the actual site, so that the positions of the anchoring devices are staggered from the fan base box substation, pedestrian passages, and drainage passages;

S2, according to the location determined on site, surveyors use a high-precision total station to locate the connection point of the tensioning device on the anchor plate 1 of the foundation, and the three points are evenly arranged at an angle of 120°;

S3, according to the connection points of the tensioning device determined by the upper anchor plate 1, use the total station to determine the positions of the fixed steel brazes 4 around the foundation pit, so as to ensure that the positions of the three fixed steel brazes 4 are connected with the three steel bars of the upper anchor plate 1 One-to-one correspondence between positions;

S4, drive three steel rods into the soil around the foundation according to the determined steel rod positions, and ensure that they are safe, stable and have a certain pull-out resistance;

S5, connect the three steel wire ropes 2 with the upper anchor plate 1 at one end according to the determined position, and connect and fix the other end with the fixed steel braze 4 using the wire tensioner 3;

S6, after the steel wire ropes 2 are connected, the surveyor measures the concentricity of the anchor plate, and tensions the three steel wire ropes 2 to varying degrees according to the measurement results;

S7, the surveyor retests the concentricity of the upper and lower anchor plates, finds out the overall offset direction of the anchor bolt cage, and uses the total station to determine the connection of the steel wire rope 2 on the upper anchor plate 1 according to the opposite direction of the overall offset of the anchor bolt cage Position, determine the fourth fixed steel drill 4 position around the foundation pit;

S8, drive the fourth steel brazing into the determined point, then connect one end of the fourth steel wire rope 2 with the connection point of the upper anchor plate 1, and connect the other end with the fourth steel brazing with the wire tensioner 3;

S9, after the connection of the fourth steel wire rope 2 is completed, the steel wire rope 2 is slowly tightened. During the process of fastening the steel wire rope 2, the surveyor continuously measures the concentricity of the anchor plate, and stops the fastening of the steel wire rope 2 until the concentricity meets the requirements;

S10, after the concentricity adjustment of the anchor plate is completed, check the connections of all the steel wire ropes 2 to ensure that all the steel wire ropes 2 are securely fastened and effective.

It also includes the following steps: after the fan foundation reinforcement is installed and before the fan foundation concrete is poured, the concentricity of the anchor plate must be retested. If the concentricity of the anchor plate is found to be offset, adjust the steel wire rope 2 in the opposite direction in time to make the anchor The concentricity of the plate meets the requirements.

The second phase project of Diantang Wind Farm is located in Xing'an County, Guilin City, Guangxi Zhuang Autonomous Region. The total installed capacity of the project is 80MW, including 20 wind turbines with a single capacity of 4W. The foundations of the wind turbines are all in the form of prestressed anchor bolt assemblies. Relying, after the installation of the prestressed anchor bolt assembly is completed, three fixed steel drills 4 are arranged outside the excavation side of the foundation pit, and the fixed steel drills 4 are evenly arranged at an angle of 120° along the periphery of the foundation pit. The steel wire rope 2 and the wire tensioner 3 connect the upper anchor plate 1 with the fixed steel braze 4. After the connection is completed, the wire tensioner 3 is used for pre-tightening, and a high-precision total station is used to retest the concentricity. Out of the offset direction of the assembly, the fourth tensioning device is arranged in the opposite direction, and the concentricity is adjusted by the fourth tensioning device.

After the installation of the anchor bolt assembly is completed, three tensioning devices are arranged on the upper part of the upper anchor plate 1 at an angle of 120°. The direction of the fourth tensioning device is opposite to the offset direction of the assembly. Adjust the concentricity and fasten the three tensioning devices first. Using the fourth tensioning device to adjust the offset direction can realize rapid adjustment of concentricity.

The application of the present invention can realize the rapid adjustment of the concentricity of the prestressed anchor bolt assembly, the method of use is convenient, manpower and material resources can be saved, safety is reliable, the speed is fast, and the construction cost is saved.

The examples are merely examples for clear description, and do not limit the embodiments. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the scope of protection of the present invention.

Claims (6)

1. The device for assisting the prestress anchor bolt assembly to adjust the concentricity is characterized by comprising a plurality of groups of pulling and fixing devices, wherein each pulling and fixing device comprises a steel wire rope, a tightener and a fixed steel drill rod, and an upper anchor plate is connected with the fixed steel drill rod through the steel wire rope.

2. The apparatus for assisting in the adjustment of concentricity of a prestressed anchor assembly as claimed in claim 1, wherein the number of said wires is four, three of which are disposed at an angle of 120 ° and a fourth of which is disposed in a direction opposite to the direction of deflection of the anchor assembly.

3. The apparatus for assisting in adjusting concentricity of a prestressed anchor assembly as set forth in claim 1, wherein the number of said fixed steel wires is four.

4. The device for assisting in adjusting concentricity of a prestressed anchor assembly according to claim 1, wherein the number of tighteners is four, and the wire rope is connected with the fixed steel drill by using tighteners.

5. A construction method using the apparatus of claim 1, comprising the steps of:

s1, installing the prestress anchor bolt assembly according to requirements, and determining the positions of the first three pulling and fixing devices according to the actual field after the installation is completed, so that the positions of the pulling and fixing devices are staggered with a fan foundation box transformer, a pedestrian passageway, a drainage passageway and the like;

s2, positioning a connecting point of a pulling and fixing device on an anchor plate by using a high-precision total station by a measurer according to the site determined azimuth, wherein three points are uniformly distributed according to an angle of 120 degrees;

s3, according to the connecting point of the pulling and fixing device defined by the upper anchor plate, fixing steel drill positions are defined at the periphery of the foundation pit by using a total station, and the three fixing steel drill positions are guaranteed to correspond to the positions of the connecting points of the three steel bars of the upper anchor plate one by one;

s4, driving the three steel bars into the soil body around the foundation according to the determined positions of the steel bars, and ensuring that the steel bars are safe and stable and have certain pulling resistance;

s5, connecting one end of the three steel wire ropes with the upper anchor plate according to the determined position, and connecting and fixing the other end of the three steel wire ropes with the fixed steel wires by using a tightener;

s6, after the connection of the steel wire ropes is completed, measuring the concentricity of the anchor plate by a measurer, and tensioning the three steel wire ropes to different degrees according to the measurement result;

s7, retesting the concentricity of the upper anchor plate and the lower anchor plate by a measurer, finding out the whole deflection direction of the anchor bolt cage, and determining a steel wire rope connection position on the upper anchor plate by using a total station according to the opposite direction of the whole deflection of the anchor bolt cage, and determining a fourth fixed steel drill position on the periphery of the foundation pit;

s8, driving a fourth steel drill rod into the determined point position, then connecting one end of a fourth steel wire rope with the upper anchor plate connecting point, and connecting the other end of the fourth steel wire rope with the fourth steel drill rod by using a tightener;

s9, slowly tensioning the steel wire rope after the fourth steel wire rope is connected, and continuously measuring the concentricity of the anchor plate by a measurer in the process of fastening the steel wire rope until the concentricity meets the requirement, and stopping fastening the steel wire rope;

and S10, after the concentricity adjustment of the anchor plate is finished, checking the connection of all the steel wire ropes, and ensuring the safety and the fastening effect of all the steel wire ropes.

6. A method of construction according to claim 5, further comprising the steps of: and retesting the concentricity of the anchor plate after the installation of the reinforcing steel bars of the fan foundation and before the concrete pouring of the fan foundation is finished, if the concentricity deviation of the anchor plate is found, the steel wire ropes in the opposite directions of the deviation are timely adjusted, so that the concentricity of the anchor plate meets the requirement.

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