CN219365493U - Rag bolt positioner of exposed steel column foot - Google Patents

Abstract

The utility model belongs to the technical field of steel structure construction, and provides an anchor bolt positioning device for an exposed steel column foot, which is arranged on a foundation reinforcement cage in a foundation pit before concrete pouring. The utility model can achieve the purposes of convenient installation and accurate positioning of the foundation bolt.

Description

An anchor bolt positioning device for an exposed steel column foot

technical field

The utility model belongs to the technical field of steel structure construction, in particular to an anchor bolt positioning device for an exposed steel column foot.

Background technique

The steel column foot is an important node in the steel structure. Its function is to transmit the axial force, shear force and bending moment at the lower end of the steel column to the foundation, so that the steel column and the foundation are effectively connected together to ensure that the upper structure can withstand various external forces. . The type of steel column foot is divided into exposed type, outsourcing type, embedded type and plug-in type according to the position of the column foot. Exposed steel column feet are usually used in light steel structure houses and heavy industrial workshops, and exposed steel column feet can also be used for multi-storey and high-rise steel frames with seismic fortification intensity of 6 or 7 degrees and a height of no more than 50m.

During the construction of the exposed steel column foot, the steel column and the foundation are generally connected and fixed by anchor bolts, and the anchor bolts are usually pre-buried in the foundation. At present, when installing anchor bolts, the horizontal positioning and vertical elevation of the suspended anchor bolts are adjusted one by one by using positioning steel plates, theodolites, steel tapes, level gauges, etc. before the foundation concrete is poured. The anchor bolts and the foundation reinforcement cage are temporarily fixed, and the horizontal positioning and vertical elevation of the suspended anchor bolts temporarily fixed by short steel bars are checked one by one by using theodolite, steel tape measure, level gauge, etc. before the foundation concrete is initially set.

The existing exposed steel column feet use a lot of equipment when installing the anchor bolts, the steps are complicated, and the positioning is not accurate. The horizontal positioning and vertical elevation adjustment of the anchor bolts are relatively difficult, and the anchor bolts are likely to shift when short steel bars are used for temporary fixation. In addition, when the foundation concrete is poured, the anchor bolts are likely to be horizontal and vertical due to the vibration of the vibrating rod. 2. The anchorage length of the anchor bolts in the foundation is too long (according to the fourth edition of "Steel Structure Design Manual" edited by Dan Ziyi (China Architecture and Building Press, 2019 According to the relevant regulations on pages 1153 and 1164 of February 2019, the anchorage length of the anchor bolts in the foundation should generally not be less than 25d, where d is the diameter of the anchor bolts), and the anchor bolts are suspended in the air, and the verticality of the anchor bolts is slightly If there is a deviation, the horizontal deviation of the anchor bolts will be too large.

Utility model content

In order to solve the above problems, the utility model provides an anchor bolt positioning device for exposed steel column feet, which can not only solve the problems of difficult horizontal positioning and vertical elevation adjustment of the anchor bolts, but also greatly improve the anchor bolt positioning. The anti-pullout ability achieves the purpose of convenient installation and accurate positioning of anchor bolts.

The technical scheme that the utility model solves its technical problem adopts is:

An anchor bolt positioning device for an exposed steel column foot, the device is installed on the foundation reinforcement cage in the foundation pit before concrete pouring, and the device includes a connecting piece, a positioning derrick, an anchor bolt and a bottom fixing nut. The connecting piece is installed on the outer periphery of the positioning derrick and fixedly connects the positioning derrick and the basic steel cage into one body. The positioning derrick is provided with through holes corresponding to the pre-embedded number and positions of the anchor bolts. The anchor bolts pass through the corresponding The through hole passes through the positioning derrick, and the bottom fixing nut is threadedly connected to the bottom of the anchor bolt and the anchor bolt and the positioning derrick are fixedly connected into one.

Optionally, the positioning derrick includes two horizontal frames arranged horizontally at a certain distance up and down and several uprights fixedly connecting the two horizontal frames into one, the through holes are opened on each horizontal frame, and the connection Parts are fixedly installed on the outer periphery of each horizontal frame.

Optionally, the horizontal frame includes a transverse positioning plate, a longitudinal positioning plate and a slanting bracing plate, at least 2 transverse locating plates and at least 2 longitudinal locating plates are fixedly connected together in a well-shaped shape, and the slanting bracing plates are arranged obliquely Between the two transverse positioning plates, the through hole is opened at the intersection of the transverse positioning plate and the longitudinal positioning plate, and the connectors are installed at both ends of the transverse positioning plate.

Optionally, the horizontal positioning plate, the longitudinal positioning plate, the diagonal bracing plate, the column and the connecting piece are all made of angle steel.

Optionally, the diameter of the through hole is d+2mm, where d is the diameter of the anchor bolt.

Optionally, the pre-embedded depth of the anchor bolts in the foundation pit is 10d-20d, which greatly reduces the anchorage depth of the anchor bolts in the foundation.

Optionally, when the material of the anchor bolts is Q235, the embedded depth of the anchor bolts is 10d to 15d; when the material of the anchor bolts is Q345, the embedded depth of the anchor bolts is 15d to 20d.

Optionally, the anchor bolt includes a bolt body, a top fixing nut and an adjusting nut threadedly connected to the top of the bolt body, and the adjusting nut is located below the top fixing nut.

Optionally, the anchor bolt further includes two backing plates sheathed on the bolt body, and the two backing plates are located between the top fixing nut and the adjusting nut.

Optionally, the width of the backing plate is 3d, the thickness of the backing plate is 20mm when the diameter of the anchor bolt is not greater than 48mm, and the thickness of the backing plate is 30mm when the diameter of the anchor bolt is greater than 48mm.

The beneficial effects produced by the utility model are: the utility model provides an exposed steel column base anchor bolt positioning device, the device is fixedly connected with the reinforcement cage of the foundation pit through the connecting piece, and then the positioning derrick is fixed and installed On the connecting parts, the anchor bolts are finally fixed and installed on the positioning derrick through nuts, and the device can be connected with the basic steel cage to form a reliable and stable support system, and finally the anchor bolts can be easily installed and positioned accurately. Purpose.

First of all, the utility model adjusts the installation height of the positioning derrick and makes all the through holes correspond to the pre-embedded positions of the anchor bolts one by one. When the anchor bolts are installed, they only need to pass through the positioning derrick from the corresponding through holes and then fix them with the fixing nuts at the bottom. It can be installed on the positioning mechanism, the installation is simple and reliable, and it can also avoid the problems in the prior art that the horizontal positioning of the anchor bolts and the adjustment of the vertical elevation are difficult due to the easy shaking of the suspension arrangement of the anchor bolts, so as to ensure the positioning accuracy of the anchor bolts ;

Secondly, compared with the prior art that uses short steel bars for temporary fixation, the anchor bolts are likely to shift. The anchor bolts of the utility model form a solid connection system integrated with the positioning derrick, the connectors and the basic steel cage, so that the anchor bolts The bolts are not easy to shift, which further ensures the positioning accuracy of the anchor bolts;

Thirdly, the utility model forms a solid connection system integrating the anchor bolts and the foundation steel cage by setting the positioning derrick and connecting pieces, which can avoid the horizontal and vertical displacement of the anchor bolts caused by the vibration of the vibrating rod during the pouring of the foundation concrete. Positioning problem, to further ensure the positioning accuracy of the anchor bolts;

Finally, the utility model forms a stable connection system integrating the anchor bolts and the foundation steel cage by setting the positioning derrick and connecting pieces, which greatly improves the pull-out resistance of the anchor bolts and ensures the safety and reliability of the anchor bolts.

Description of drawings

The utility model will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is the elevation view of the anchor bolt positioning device of the exposed steel column foot in the utility model embodiment;

Fig. 2 is a plan view of the anchor bolt positioning device of the exposed steel column foot in the embodiment of the present invention;

Fig. 3 is a schematic diagram of the structure of the anchor bolts in the embodiment of the utility model.

In the figure: 1-horizontal positioning plate, 2-longitudinal positioning plate, 3-diagonal bracing plate, 4-connector, 5-column, 6-anchor bolt, 61-bottom fixing nut, 62-top fixing nut, 63- Adjusting nut, 64-backing plate, 65-bolt body, 7-through hole.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The anchor bolt positioning device of the exposed steel column foot of the utility model is described below with reference to FIGS. 1-3 .

As shown in Figure 1 and Figure 2, the utility model provides an anchor bolt positioning device for exposed steel column feet, which is installed on the foundation reinforcement cage in the foundation pit before concrete pouring (the foundation pit is not shown in the figure and basic reinforcement cage), the device includes connecting piece 4, positioning derrick (in this embodiment, the horizontal positioning plate 1, the longitudinal positioning plate 2, the slanting plate 3, and the column 5 are connected according to the requirements of the diagram), anchor bolts 6 and the bottom fixing nut 61, the connecting piece 4 is installed on the outer periphery of the positioning derrick and the positioning derrick is fixedly connected with the basic steel cage into one body, and the positioning derrick is provided with through holes 7 corresponding to the pre-embedded quantity and positions of the anchor bolts, The anchor bolt 6 passes through the positioning derrick through the corresponding through hole 7, and the bottom fixing nut 61 is threadedly connected to the bottom of the anchor bolt and the anchor bolt 6 and the positioning derrick are fixedly connected as one.

In one embodiment of the present utility model, as shown in Fig. 1 and Fig. 2, the positioning derrick includes two horizontal frames arranged horizontally at a certain distance up and down and several upright columns 5 fixedly connecting the two horizontal frames into one body. The holes 7 are opened on each horizontal frame, and the connecting piece 4 is fixedly installed on the outer periphery of each horizontal frame. The utility model adopts a two-layer horizontal frame, which can make the anchor bolts fixed more firmly and further improve the positioning accuracy.

In one embodiment of the present utility model, as shown in Fig. 1 and Fig. 2, the horizontal frame includes a transverse positioning plate 1, a longitudinal positioning plate 2 and a brace plate 3, at least two transverse positioning plates 1 and at least two longitudinal positioning plates The plates 2 are fixedly connected together in a well-shaped shape, the slanting braces 3 are arranged obliquely between the two transverse positioning plates 1, the through holes 7 are opened at the intersection of the transverse positioning plate 1 and the longitudinal positioning plate 2, and the connecting piece 4 is installed on the Position the ends of the board laterally. The utility model adopts a horizontal frame with a well-shaped structure, and is reinforced and connected by slanting braces, which can ensure that the positioning derrick is not easy to deform and improve its stability, thereby further ensuring the accuracy of the positioning of the anchor bolts.

In one embodiment of the present utility model, as shown in Fig. 1 and Fig. 2, the transverse positioning plate 1, the longitudinal positioning plate 2, the diagonal bracing plate 3, the column 5 and the connector 4 are all made of angle steel. The positioning derrick and connecting parts of the utility model are made of commonly used material angle steel, which has the advantages of convenient material acquisition, easy manufacture and low cost, and the connecting part is made of angle steel. The installation position of the plate can be adjusted within the range of the limb width to adapt to the installation deviation of the foundation reinforcement cage (there is a deviation between the foundation reinforcement cage and the edge of the foundation pit during installation).

During implementation, the selection of each angle steel part of the device depends on the model of the anchor bolts. The utility model obtains the optimal selection table of each angle steel part as shown in Table 1 through optimization calculation.

Table 1 Optimum selection table for each angle steel component

Anchor bolt model lateral positioning plate Longitudinal positioning plate Bracing plate connector column s(mm) M24×3 L56×5 L56×5 L50×4 L56×5 L50×4 15 M30×3.5 L63×5 L63×5 L56×4 L63×5 L56×4 20 M56×4 L75×5 L75×5 L63×4 L75×5 L63×4 25 M42×4.5 L90×6 L90×6 L75×5 L90×6 L75×5 30 M48×5 L100×7 L100×7 L90×6 L100×7 L90×6 35 M56×5.5 L125×8 L125×8 L100×7 L125×8 L100×7 40 M64×6 L140×10 L140×10 L125×8 L140×10 L125×8 50 M72×6 L160×12 L160×12 L140×10 L160×12 L140×10 60

Note: s is the distance between the end of the lateral positioning plate and the edge of the connector.

Because the utility model can quickly and accurately install the anchor bolts, the holes through which the anchor bolts pass can be designed to be slightly larger than its diameter, and the apertures of the through holes on the lateral positioning plate 51 and the longitudinal positioning plate 52 can be d+2mm.

The utility model can greatly improve the pull-out force of the anchor bolts by reliably connecting the anchor bolts with the foundation steel cage, and the pull-out force of the anchor bolts is also related to its anchorage depth, so when the design pull-out force is met Next, the utility model can reduce the anchoring depth of the anchor bolts. The preferred embedded depth of the anchor bolts in the foundation pit is 10d-20d, where d is the diameter of the anchor bolts. The utility model can reduce the anchoring depth of the anchor bolts by at least 5d, greatly reduce the anchoring depth of the anchor bolts in the foundation, and reduce the occurrence of excessive horizontal deviation of the anchor bolts due to slight deviations in the verticality of the anchor bolts , to further provide the positioning accuracy of the anchor bolts.

Considering that the anchorage depth of the anchor bolts in the foundation is also related to its material, the utility model is obtained through optimization calculation. When the material of the anchor bolts is Q235, the pre-embedded depth of the anchor bolts is 10d-15d; the material of the anchor bolts When it is Q345, the pre-embedded depth of anchor bolt 3 is 15d～20d.

In the utility model, after the anchor bolts are installed, concrete is poured into the foundation pit and maintained, and then the steel column equipped with the base plate is hoisted to the anchor bolts, and the horizontal positioning and vertical elevation of the base plate are adjusted in place. , filling the gap between the column base plate and the foundation concrete with grouting material, so as to realize the fixed connection between the column base plate and the concrete foundation. The prior art adopts the method of padding wedges into the gap to adjust the horizontal elevation of the base plate of the column base. However, the method of padding wedges has the difficulty of requiring repeated operations. Therefore, in one embodiment of the present invention, as shown in Figure 3, The anchor bolt 6 includes a bolt body 65 and a top fixing nut 62 and an adjusting nut 63 that are threadedly connected to the top of the bolt body. The foot plate is installed on the anchor bolt and supported on the adjusting nut. By selecting the adjusting nut, the vertical elevation of the column foot plate can be controlled. The operation is simple and convenient, and the adjustment accuracy is good. Then the column foot plate is fixed by the top fixing nut, and the top Fixed nut can adopt double nut.

During implementation, a backing plate is provided between the nut and the bottom plate of the column to prevent loosening. Therefore, in one embodiment, as shown in FIGS. Two backing plates 64 are located between the top fixing nut and the adjusting nut. The hole diameter of the hole on the backing plate is d+2mm.

The specifications of the backing plate are related to the specifications of the anchor bolts. Preferably, the width of the backing plate 34 is 3d. When the diameter of the anchor bolts is not greater than 48mm, the thickness of the backing plate is 20mm. When the diameter of the anchor bolts is greater than 48mm, the thickness of the backing plate is 20mm. The thickness of the plate is 30 mm.

When the positioning device provided by the utility model is used to install the steel column foot, the construction method of the steel column foot includes the following steps:

S1. Excavate the foundation pit, and lay and tie the foundation bottom plate reinforcement, vertical longitudinal reinforcement and stirrup on the foundation cushion according to the requirements of the construction drawing to form a foundation reinforcement cage;

S2. Within the pre-embedded depth range of the anchor bolts, the positioning derrick and the basic steel cage are fixedly connected into one body through the connecting piece. After the positioning derrick is installed, the positions of each through hole are consistent with the pre-embedded positions of the corresponding anchor bolts. The body passes through the through hole of the positioning derrick, and the bolt body is fixedly connected with the positioning derrick through a pair of bottom fixing nuts;

When the positioning derrick and connecting parts are made of angle steel, step S2 specifically includes:

S21. Install connectors: within the pre-embedded depth of the anchor bolts, install the connectors made of angle steel horizontally on the foundation reinforcement cages on opposite sides of the foundation pit, and install 2 connectors on each side of the foundation reinforcement cages. One leg of each connecting piece is installed vertically on the foundation reinforcement cage, the other leg is set horizontally inward, the other limbs of the upper two connecting pieces are set at the same height, and the other limbs of the two lower connecting pieces are arranged at the same height Equal height setting, the connecting piece and the basic reinforcement cage can be firmly connected by welding;

S22. Install the lateral positioning plate: place the lateral positioning plate made of angle steel on the other limb of the connector, each lateral positioning plate is provided with 2 through holes, and place 2 lateral positioning plates on the two upper connectors Two horizontal positioning plates are placed on the two connecting parts below, and the positions of all through holes are adjusted to be consistent with the pre-embedded positions of the corresponding anchor bolts, and then the horizontal positioning plate is fixedly connected to the connecting parts, which can be welded make a firm connection;

S23. Install the longitudinal positioning plate: prepare 4 longitudinal positioning plates made of angle steel, each longitudinal positioning plate is provided with 2 through holes, and fix the 2 longitudinal positioning plates on the upper horizontal positioning plate in the shape of a well , fix and install the two longitudinal positioning plates on the lower horizontal positioning plate in the shape of a well, and adjust the positions of all through holes to be consistent with the pre-embedded positions of the corresponding anchor bolts. The vertical positioning plate and the horizontal positioning plate Can be firmly connected by welding;

S24. Installing columns: vertically place the 4 columns made of angle steel at the 4 intersections formed by the intersection of the horizontal positioning plate and the longitudinal positioning plate, one leg of each column is fixedly connected with the upper and lower horizontal positioning plates, and the other The limbs are fixedly connected with the upper and lower longitudinal positioning plates, which can be firmly connected by welding;

S25. Install slanting braces: Prepare 2 slanting braces made of angle steel, one of which is obliquely set between the upper two horizontal positioning plates, and the other slanting bracing is obliquely set between the lower two horizontal positioning plates In between, the diagonal bracing plate and the lateral positioning plate can be firmly connected by welding. The installation sequence of steps S25 and S24 can be reversed, that is, the uprights can be installed before the diagonal bracing plate, or the diagonal bracing plate can be installed first and then the upright column. The installation of the positioning derrick is completed after the slanting braces and columns are installed;

S26. Pass 4 anchor bolts through the positioning derrick through the corresponding through holes, and connect the bolt body and the positioning derrick into one body through a pair of bottom fixing nuts;

S3. Pour concrete into the foundation pit and perform maintenance. Specifically, install the foundation formwork and reserve shear grooves in the foundation, pour the foundation concrete according to the specifications, and cover it with a film in time for maintenance after the concrete pouring is completed;

S4. Set the steel column on the bolt body through the column base plate fixed at the bottom. After adjusting the horizontal positioning and vertical elevation of the column base plate through the adjusting nut, screw the top fixing nut to the top of the bolt body. Complete the connection between the column base plate and the concrete foundation;

Step S4 specifically includes the following steps:

S41. In the steel structure processing workshop, the shear key 4 is sequentially welded below the base plate of the column foot, and the base plate of the column base is welded to the bottom of the steel column;

S42. Install adjusting nuts and backing plates in turn on the bolt body, use a crane to hoist the steel column (including the column base plate and the shear key) to the corresponding position, and at the same time pass the anchor bolts through the bolt holes of the column base plate;

S43. Adjust the adjusting nuts in sequence to control the horizontal positioning and vertical elevation of the column base plate. ) means installed in place;

S5: Filling with grouting material, prepare high-strength non-shrinking grouting material, and use grouting material to fill the gaps between the base plate of the column foot, the shear key and the concrete foundation.

When the utility model is installed, the corresponding elevation in the foundation pit should be determined according to the pre-embedded depth of the anchor bolts, and the positioning derrick and connectors should be located within the pre-embedded depth range of the anchor bolts. The utility model adopts angle steel to make the positioning derrick and connecting parts, firstly determine its installation elevation, and then install the connecting parts, horizontal positioning plate, longitudinal positioning plate, column, and diagonal bracing plate in sequence, which can be made according to the actual working conditions on site, and Installed in the foundation pit, it is not limited by the steel mesh at the top of the foundation pit, and through the long-distance connection of the entire limb of the angle steel, it can ensure reliable connection between the components, the connector and the foundation reinforcement cage, so that the positioning mechanism and the foundation reinforcement cage A solid support system is formed between the cages to improve the positioning accuracy of the anchor bolts.

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should belong to the protection scope of the appended claims of the present utility model.

Claims (10)

1. The utility model provides an rag bolt positioner of exposed steel column foot, its characterized in that, the device is installed on the foundation reinforcement cage in the foundation ditch before concrete placement, and the device includes connecting piece, location derrick, rag bolt and bottom fixation nut, the connecting piece is installed in the periphery of location derrick and is become integrative with location derrick and foundation reinforcement cage fixed connection, be equipped with the through-hole corresponding with rag bolt pre-buried quantity and position on the location derrick, rag bolt passes the location derrick through the through-hole that corresponds, bottom fixation nut threaded connection is in rag bolt's bottom and is become integrative with rag bolt and location derrick fixed connection.

2. The foundation bolt positioning device for the exposed steel column base of claim 1, wherein the positioning derrick comprises two horizontal frames horizontally arranged at a certain distance from top to bottom and a plurality of upright posts fixedly connecting the two horizontal frames into a whole, the through holes are formed in each horizontal frame, and the connecting pieces are fixedly arranged on the periphery of each horizontal frame.

3. The foundation bolt positioning device for the exposed steel column base of claim 2, wherein the horizontal frame comprises transverse positioning plates, longitudinal positioning plates and inclined supporting plates, at least 2 transverse positioning plates and at least 2 longitudinal positioning plates are fixedly connected together in a cross shape, the inclined supporting plates are obliquely arranged between the two transverse positioning plates, through holes are formed in the intersection of the transverse positioning plates and the longitudinal positioning plates, and the connecting pieces are arranged at two ends of the transverse positioning plates.

4. An exposed steel column foot anchor bolt locating device according to claim 3, wherein the transverse locating plate, the longitudinal locating plate, the diagonal bracing plate, the upright column and the connecting piece are all made of angle steel.

5. An exposed steel column foot anchor bolt positioning device according to claim 1, wherein the aperture of the through hole is d+2mm, d being the diameter of the anchor bolt.

6. The foundation bolt positioning device for the exposed steel column base of claim 1, wherein the depth of the foundation bolts embedded in the foundation pit is 10 d-20 d.

7. An anchor bolt positioning device for an exposed steel column foot according to claim 1 or 6, wherein when the anchor bolt is made of Q235, the embedded depth of the anchor bolt is 10 d-15 d; when the foundation bolt is made of Q345, the embedded depth of the foundation bolt is 15 d-20 d.

8. An anchor bolt positioning device for an exposed steel column foot according to claim 1, wherein the anchor bolt comprises a bolt body, and a top fixing nut and an adjusting nut which are screwed on the top of the bolt body, and the adjusting nut is located below the top fixing nut.

9. The foundation bolt positioning device of claim 8, wherein said foundation bolt further comprises two pads sleeved on said bolt body, said two pads being located between said top fixing nut and said adjusting nut.

10. An exposed steel column foot anchor bolt positioning device according to claim 9, wherein the width of the shim plate is 3d, the thickness of the shim plate is 20mm when the diameter of the anchor bolt is not more than 48mm, and the thickness of the shim plate is 30mm when the diameter of the anchor bolt is more than 48 mm.