Precise embedding method for embedded bracket and support dense foundation bolt embedded holes

Abstract

The precise pre-burying method for the dense foundation bolt pre-burying holes of the pre-buried support and the support is reasonable in design, geometric correlation of dense pre-buried pipe bodies is structurally enhanced, a fixing mode is changed into connection with a pier body construction auxiliary stiff framework, disturbance and impact of a follow-up construction process on pre-buried parts are avoided, and the construction efficiency is improved. The stability of the structure is enhanced, errors in the construction process are reduced from the angle of the structure, and the geometric accuracy of the embedded pipe body is guaranteed; in the aspect of construction convenience, positioning work of a conventional embedded pipe body is converted into lofting work of a positioning support, and the embedding precision can be guaranteed while the working difficulty and strength are reduced; the field operation efficiency is improved; according to the whole method, the number of workers needed in the field construction period is reduced from five workers to two workers in a conventional pre-burying method, the pre-burying precision can be guaranteed while the utilization efficiency of the workers is improved, the use cost of project workers is saved, and continuous promotion of the project is increased, and resources are saved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering support construction, and in particular to a method for accurately embedding embedded holes for embedded brackets and dense anchor bolts of supports. Background Art

[0002] The positioning accuracy of bridge bearings is high. There are many anchor bolts on the bottom of the bearings, and their length is large. The height of the cushion stone is not enough to accommodate the entire length of the anchor bolts. It is necessary to consider pre-embedding of the channels during the pier body construction stage. According to the construction process, the pier body and the cushion stone need to be constructed in two times, and the construction duration is relatively long. During the pier body construction stage, the number of steel bars at the pier top and cushion stone positions is large and the layout is dense. The pre-embedded channels are easy to conflict with the steel bars at the pier top. When the construction is carried out according to the traditional method of pre-embedding each hole with steel bars fixed, due to the large burial depth, there are many other construction processes interspersed, there are many human disturbance factors, and it is extremely easy to cause the pipeline depth and plane position to deviate from the design state due to the impact and buoyancy of the concrete. The pre-embedding accuracy of the anchor bolt holes is high, and repeated measurements and corrections are required at each construction stage involved. The construction is cumbersome and the accuracy is difficult to guarantee.

[0003] For example, the patent CN103469732A discloses a construction method for reserved holes for bridge bearing anchor bolts, which includes the following steps: (1) determining the position of the reserved hole in the cap beam or pier to be cast, leaving a gap for the reserved hole; (2) determining the position of the center of the reserved hole for the bearing anchor bolt relative to the upper steel bar of the cap beam or pier; (3) making a steel sleeve; (4) making a fixed frame; (5) installing the fixed frame above the steel bar layer of the cap beam or pier to be cast; (6) inserting the steel sleeve into the circular ring of the fixed frame; (7) pouring concrete, and pulling out the steel sleeve after final setting, and removing or retaining the fixed frame; (8) using the reserved bearing cushion stone longitudinal reinforcement, tying the bearing cushion stone steel mesh, inserting the steel sleeve for the second time, and pouring the bearing cushion stone concrete; this scheme cannot be used for precise positioning of the embedded holes for dense anchor bolts of the bearing. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method for accurately embedding embedded holes for embedded brackets and supports with dense anchor bolts, which reduces the difficulty and intensity of the work while ensuring the accuracy of embedding.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A pre-embedded bracket includes an auxiliary rigid frame for pier body construction and a rectangular positioning frame for positioning a group of pre-embedded sleeves. The rectangular positioning frame is fixed to the auxiliary rigid frame for pier body construction through a connecting frame, and both ends of the rectangular positioning frame are provided with sleeve positioning structures for inserting and positioning the pre-embedded sleeves.

[0007] The connecting frame comprises a horizontal supporting rod, a connecting vertical rod and a supporting diagonal rod, wherein the horizontal supporting rod, the connecting vertical rod and the supporting diagonal rod are welded to form a three-piece frame, and a rectangular positioning frame is welded to the horizontal supporting rod.

[0008] The auxiliary rigid skeleton for pier body construction comprises a pre-embedded rectangular frame and a group of pre-embedded vertical skeletons, and each pre-embedded vertical skeleton is connected to a corner of the corresponding pre-embedded rectangular frame.

[0009] The rectangular positioning frame includes a bottom positioning bracket, a top limiting bracket and a set of vertical connecting rods. The top limiting bracket is fixed above the bottom positioning bracket through the vertical connecting rods. The corresponding ends of the bottom positioning bracket and the top limiting bracket are both provided with positioning spaces.

[0010] The end of the bottom positioning bracket is provided with an outer longitudinal positioning rod and an inner longitudinal positioning rod, a group of tube body positioning rods are arranged between the outer longitudinal positioning rod and the inner longitudinal positioning rod, and a bottom tube length limiting rod for limiting the bottom end of the embedded sleeve is provided below the tube body positioning rod.

[0011] Reinforced scissor braces are provided inside the bottom positioning bracket and the top limiting bracket.

[0012] A cross reinforcement frame is arranged between the bottom positioning bracket and the top limiting bracket on the inner side of the positioning space.

[0013] The end structure of the top limiting bracket and the end structure of the bottom positioning bracket are arranged correspondingly up and down.

[0014] A method for accurately embedding dense anchor bolt embedded holes of a support using the embedded bracket comprises the following steps:

[0015] Step 1: Mark the horizontal and vertical axes of the embedded pipe group and the geometric positions of the center of each pipe body corresponding to the pipe group on the flat ground; place the pipe body of the corresponding diameter at each pipe body point, and adjust the verticality with a plumb bob or ruler;

[0016] Step 2: Process the bottom positioning frame, top limiting frame, vertical connecting rod, and reinforcing frame in sequence in the back field, insert them into the tube body, and weld the components into an integral rectangular frame;

[0017] Step 3: Use the total station to collect the three-dimensional relative coordinates of the center of the top and bottom openings of the pipe group and the four corners of the top and bottom openings of the rectangular frame, and reverse the installation coordinates of the four corners of the top and bottom openings of the rectangular frame according to the designed installation coordinates of the bottom opening of the pipe group;

[0018] Step 4: Locate the corresponding position of the rectangular frame bottom installation coordinates on site, and process the connecting frame on site; Locate the frame bottom position on the horizontal supporting rod of the connecting frame;

[0019] Step 5: hoist the rectangular frame of the restraining pipe group onto the horizontal support rod of the connecting frame, accurately adjust the frame position and collect the positioning feature points of the four corners of the top for verification. If the deviation is large, make fine adjustments. After meeting the requirements, weld the rectangular frame to the connecting frame;

[0020] Step 6: Check and verify the top and bottom positions of each pipe body in the pipe group, and record and calculate the verticality of the pipe body.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The method for accurately embedding the embedded holes of the embedded bracket and the support dense anchor bolts is reasonably designed. Compared with the conventional discrete steel bar fixed embedded pipe method, the geometric relationship of the dense embedded pipe is structurally enhanced, and the fixing method is changed to be connected with the auxiliary rigid skeleton of the pier body construction, which avoids the disturbance and impact of the subsequent construction process on the embedded parts themselves, enhances the stability of the structure itself, reduces the error in the construction process from the structural point of view, and ensures the geometric accuracy of the embedded pipe body; in terms of construction convenience, the positioning work of the conventional embedded pipe body is converted into the layout work of the positioning bracket, which reduces the difficulty and intensity of the work while also ensuring the embedded precision; this method simplifies the complex pre-embedded problems. From technical design to on-site implementation, each step has a strong logical connection. In addition, except for the installation of the connecting frame, which needs to be adapted to local conditions according to the on-site environment, all other components are prefabricated in the post-processing process to ensure the processing accuracy of the components, further improving the on-site operation efficiency; the number of personnel required for the entire method during on-site construction is reduced from five in the conventional pre-embedded method to two, which improves the utilization efficiency of personnel while ensuring the accuracy of pre-embedded, saves the cost of project personnel, and increases revenue and reduces expenditure for the continuous advancement of the project, and has a good prospect for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following is a brief description of the contents and symbols in the drawings of this specification:

[0024] Figure 1 It is a schematic diagram of the overall structure of the embedded bracket of the present invention.

[0025] Figure 2 It is a schematic diagram of the composition of the bottom positioning bracket of the present invention.

[0026] Figure 3 It is a schematic diagram of the composition of the top limiting bracket of the present invention.

[0027] Figure 4 It is a schematic diagram of the vertical connecting rod of the present invention.

[0028] Figure 5 It is a schematic diagram of a rectangular frame of the present invention.

[0029] Figure 6 It is a schematic diagram of a reinforcing frame in a rectangular frame of the present invention.

[0030] Figure 7 It is a schematic diagram of the structure of the connecting frame of the present invention.

[0031] Figure 8 It is a schematic diagram of the connection between the connecting frame and the rigid frame of the present invention.

[0032] Fig. 9 It is a schematic diagram of the axis and each pipe body of the pipe group after being adjusted vertically according to the present invention.

[0033] Fig.10 This is a schematic diagram of the rectangular frame of the present invention after assembly.

[0034] Fig.11 This is a schematic diagram of the on-site hoisting completion of the rectangular frame of the present invention.

[0035] Fig.12 It is a schematic diagram of the working scene of the present invention. DETAILED DESCRIPTION

[0036] The specific implementation modes of the present invention will be further explained in detail below through the description of embodiments with reference to the accompanying drawings.

[0037] The embedded bracket comprises an auxiliary rigid frame for pier body construction and a rectangular positioning frame for positioning a group of embedded sleeves; the rectangular positioning frame is fixed to the auxiliary rigid frame for pier body construction through a connecting frame, and sleeve positioning structures for inserting and positioning the embedded sleeves are arranged at both ends of the rectangular positioning frame.

[0038] The connecting frame comprises a horizontal supporting rod, a connecting vertical rod and a supporting diagonal rod, which are welded to form a three-piece frame, and a rectangular positioning frame is welded to the horizontal supporting rod, so as to facilitate connection and adjustment.

[0039] The auxiliary rigid frame for pier body construction includes a pre-embedded rectangular frame and a group of pre-embedded vertical frames. Each pre-embedded vertical frame is connected to the corresponding corner of the pre-embedded rectangular frame, and the structure is stable and reliable.

[0040] The rectangular positioning frame includes a bottom positioning bracket, a top limiting bracket and a group of vertical connecting rods. The top limiting bracket is fixed above the bottom positioning bracket through the vertical connecting rod. The corresponding ends of the bottom positioning bracket and the top limiting bracket are provided with positioning spaces, and the embedded sleeve is accurately positioned through each positioning space.

[0041] The end of the bottom positioning bracket is provided with an outer longitudinal positioning rod and an inner longitudinal positioning rod, a group of tube body positioning rods are arranged between the outer longitudinal positioning rod and the inner longitudinal positioning rod, and a bottom tube length limiting rod for limiting the bottom end of the embedded casing is arranged below the tube body positioning rod. The end structure of the top limiting bracket is arranged correspondingly to the end structure of the bottom positioning bracket.

[0042] Furthermore, reinforced scissor braces are provided inside the bottom positioning bracket and the top limiting bracket; a cross reinforcement frame is provided inside the positioning space between the bottom positioning bracket and the top limiting bracket; the structure is stable and reliable and is not easily deformed during hoisting.

[0043] like Figures 1 to 12 As shown, the preferred specific examples of the embedded bracket of the present invention are:

[0044] 1. Bottom positioning bracket

[0045] like Figure 2 As shown, the bottom positioning bracket includes the bottom tube length limit, longitudinal positioning rod, transverse connecting rod, tube body positioning rod, and reinforced scissor brace, which are cut from 5 cm angle steel. There are two transverse connecting rods, and their cutting length should be one tube diameter longer than the center distance of the transverse pre-embedded anchor bolts plus the length of the 10 cm angle steel to ensure the smooth connection of the outer frame; the longitudinal positioning rod consists of the outer longitudinal positioning rod and the inner longitudinal positioning rod, both of which are two in number. The cutting length of the outer longitudinal positioning rod is the center distance of the longitudinal outermost pre-embedded anchor bolts plus the length of the 10 cm angle steel, and the cutting length of the inner longitudinal positioning rod is 10 cm shorter than the outer longitudinal positioning rod; the cutting length of the tube body limit is equal to the cutting length of the inner longitudinal positioning rod; the cutting length of the tube body limit is the diameter of the pre-embedded tube body plus 2 mm; the cutting length of the reinforced scissor brace is the diagonal length of the inner longitudinal positioning rod after assembly. Assemble the cut rods as shown in the figure below, and weld them after checking that the positions of each rod relative to the axis are correct, and the bottom positioning bracket can be made.

[0046] 2. Top limit bracket

[0047] like Figure 3 As shown in the figure, the top limit bracket is the same as the bottom positioning bracket in structure except that the bottom tube length limit is missing; both of them include longitudinal positioning rods, transverse connecting rods, tube body limiters, and reinforced scissor braces, which are cut from 5 cm angle steel, and the corresponding cutting lengths of the components are the same as those of the bottom positioning bracket. After the bottom positioning bracket is installed, the bottom positioning bracket is taken out first, and the top limit bracket assembly is assembled in the tube placement site according to the bottom positioning bracket production process.

[0048] 3. Vertical connecting rod

[0049] like Figure 4 and Figure 5 As shown, the vertical connecting rod is cut from six 5 cm angle steels, and its cutting length is the length of the embedded pipe body minus 5 cm. First, the bottom of the vertical connecting rod and the assembled bottom positioning are fixed together by welding. The top of the connecting rod is not connected to the top limit bracket for the time being. After the pipe body between the two layers of brackets is reviewed, it is welded and fixed to the top limit bracket. After welding and fixing, the top limit bracket and the bottom positioning bracket form a rectangular fixed frame. Cooperate with the total station to collect the relative coordinates of the center of the top and bottom openings of the embedded pipe body group, the top and bottom four corners of the rectangular fixed frame, and design the installation coordinates based on the center of the bottom opening of the embedded pipe body group to reverse the installation coordinates of the top and bottom four corners of the rectangular fixed frame.

[0050] 4. Strengthening frame

[0051] like Figure 6 As shown, the reinforcement frame is formed by cutting and welding four groups of 5 cm angle steels. The side diagonal length of the reinforcing scissors struts at the top and bottom of the rectangular frame is measured as the cutting length, and the side scissors struts are welded in pairs in sequence to form side scissors struts as the reinforcement frame of the rectangular frame.

[0052] 5. Connecting frame

[0053] like Figure 7 and Figure 8 As shown, the connecting frame consists of three parts: horizontal supporting rod, connecting vertical rod and supporting diagonal rod. In order to reduce the disturbance to the embedded components during the construction process, the rigid skeleton of the pier body is used as the main load-bearing carrier of the device. According to the calculated installation coordinates of the four corners of the bottom of the rectangular fixed frame, the on-site layout is carried out, and the distance from the corresponding installation point to the rigid skeleton plus 10 cm is measured as the cutting length of the horizontal supporting rod. The elevation difference from the installation point to the rigid skeleton is calculated as the cutting length of the connecting vertical rod. Cut and weld the bottom of the six connecting vertical rods on site, adjust the height of the six horizontal vertical rods to the same elevation and weld the horizontal supporting rods, and cut the supporting diagonal rods of appropriate length for welding, and the processing and fixing of the connecting frame are completed.

[0054] like Figures 9 to 12 As shown, the present invention provides a method for accurately embedding embedded holes for densely packed anchor bolts of a relatively large support, comprising the following steps:

[0055] Step 1: Mark the horizontal and vertical axes of the embedded pipe group and the geometric positions of the center of each pipe body corresponding to the pipe group on the flat ground; place the pipe body of the corresponding diameter at each pipe body point, and adjust the verticality with a plumb bob or ruler;

[0056] Step 2: Process the bottom positioning frame, top limiting frame, vertical connecting rod, and reinforcing frame in sequence in the back field, insert them into the tube body, and weld the components into an integral rectangular frame;

[0057] Step 3: Use the total station to collect the three-dimensional relative coordinates of the center of the top and bottom openings of the pipe group and the four corners of the top and bottom openings of the rectangular frame, and reverse the installation coordinates of the four corners of the top and bottom openings of the rectangular frame according to the designed installation coordinates of the bottom opening of the pipe group;

[0058] Step 4: Locate the corresponding position of the rectangular frame bottom installation coordinates on site, and process the connecting frame on site; Locate the frame bottom position on the horizontal supporting rod of the connecting frame;

[0059] Step 5: hoist the rectangular frame of the restraining pipe group onto the horizontal support rod of the connecting frame, accurately adjust the frame position and collect the positioning feature points of the four corners of the top for verification. If the deviation is large, make fine adjustments. After meeting the requirements, weld the rectangular frame to the connecting frame;

[0060] Step 6: Check and verify the top and bottom positions of each pipe body in the pipe group, and record and calculate the verticality of the pipe body.

[0061] The method for accurately embedding the embedded bracket and the embedded holes of the dense anchor bolts of the support of the present invention is reasonably designed. Compared with the conventional discrete steel bar fixed embedded pipe body method, the geometric correlation of the dense embedded pipe body is structurally enhanced, and the fixing method is changed to be connected with the auxiliary rigid skeleton of the pier body construction, thereby avoiding the disturbance and impact of the subsequent construction process on the embedded parts themselves, enhancing the stability of the structure itself, reducing the error in the construction process from the structural point of view, and ensuring the geometric accuracy of the embedded pipe body; in terms of construction convenience, the positioning work of the conventional embedded pipe body is converted into the layout work of the positioning bracket, which reduces the difficulty and intensity of the work while also ensuring the pre-embedded The method simplifies the complex pre-embedding problem. From technical design to on-site implementation, each step has a strong logical connection. In addition, except for the installation of the connecting frame, which needs to be adapted to local conditions according to the on-site environment, all other components are prefabricated in the post-processing process to ensure the processing accuracy of the components, further improving the on-site operation efficiency. The number of personnel required for the entire method during on-site construction is reduced from five in the conventional pre-embedding method to two, which improves the utilization efficiency of personnel while ensuring the accuracy of pre-embedding, saves the cost of project personnel, and increases revenue and reduces expenditure for the continuous advancement of the project. It has a good prospect for promotion and application.

[0062] The above is only an explanation of the preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0063] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A pre-embedded support, including a pier shaft construction auxiliary rigid frame, characterized in that: It also includes a rectangular positioning frame for positioning a group of embedded sleeves, the rectangular positioning frame is fixed to the auxiliary rigid frame of the pier body construction through a connecting frame, and both ends of the rectangular positioning frame are provided with sleeve positioning structures for inserting and positioning the embedded sleeves.

2. The embedded bracket according to claim 1, characterized in that: The connecting frame comprises a horizontal supporting rod, a connecting vertical rod and a supporting diagonal rod, wherein the horizontal supporting rod, the connecting vertical rod and the supporting diagonal rod are welded to form a three-piece frame, and a rectangular positioning frame is welded to the horizontal supporting rod.

3. The embedded bracket according to claim 1, characterized in that: The auxiliary rigid skeleton for pier body construction comprises a pre-embedded rectangular frame and a group of pre-embedded vertical skeletons, and each pre-embedded vertical skeleton is connected to a corner of the corresponding pre-embedded rectangular frame.

4. The embedded bracket according to claim 1, characterized in that: The rectangular positioning frame includes a bottom positioning bracket, a top limiting bracket and a set of vertical connecting rods. The top limiting bracket is fixed above the bottom positioning bracket through the vertical connecting rods. The corresponding ends of the bottom positioning bracket and the top limiting bracket are both provided with positioning spaces.

5. The embedded bracket according to claim 4, characterized in that: The end of the bottom positioning bracket is provided with an outer longitudinal positioning rod and an inner longitudinal positioning rod, a group of tube body positioning rods are arranged between the outer longitudinal positioning rod and the inner longitudinal positioning rod, and a bottom tube length limiting rod for limiting the bottom end of the embedded sleeve is provided below the tube body positioning rod.

6. The embedded bracket according to claim 4, characterized in that: Reinforced scissor braces are provided inside the bottom positioning bracket and the top limiting bracket.

7. The embedded bracket according to claim 4, characterized in that: A cross reinforcement frame is arranged between the bottom positioning bracket and the top limiting bracket on the inner side of the positioning space.

8. The embedded bracket according to claim 5, characterized in that: The end structure of the top limiting bracket and the end structure of the bottom positioning bracket are arranged correspondingly up and down.

9. A method for accurately embedding dense anchor bolt embedded holes of a support using the embedded bracket according to any one of claims 1 to 8, characterized in that: The pre-embedding method comprises the following steps: Step 1: Mark the horizontal and vertical axes of the embedded pipe group and the geometric positions of the center of each pipe body corresponding to the pipe group on the flat ground; place the pipe body of the corresponding diameter at each pipe body point, and adjust the verticality with a plumb bob or ruler; Step 2: Process the bottom positioning frame, top limiting frame, vertical connecting rod, and reinforcing frame in sequence in the back field, insert them into the tube body, and weld the components into an integral rectangular frame; Step 3: Use the total station to collect the three-dimensional relative coordinates of the center of the top and bottom openings of the pipe group and the four corners of the top and bottom openings of the rectangular frame, and reverse the installation coordinates of the four corners of the top and bottom openings of the rectangular frame according to the designed installation coordinates of the bottom opening of the pipe group; Step 4: Locate the corresponding position of the rectangular frame bottom installation coordinates on site, and process the connecting frame on site; Locate the frame bottom position on the horizontal supporting rod of the connecting frame; Step 5: hoist the rectangular frame of the restraining pipe group onto the horizontal support rod of the connecting frame, accurately adjust the frame position and collect the positioning feature points of the four corners of the top for verification. If the deviation is large, make fine adjustments. After meeting the requirements, weld the rectangular frame to the connecting frame; Step 6: Check and verify the top and bottom positions of each pipe body in the pipe group, and record and calculate the verticality of the pipe body.

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