CN107338817B - Anchor bolt dismantling structure in prestressed anchor bolt foundation and replacement construction method - Google Patents
Anchor bolt dismantling structure in prestressed anchor bolt foundation and replacement construction method Download PDFInfo
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- CN107338817B CN107338817B CN201710713456.6A CN201710713456A CN107338817B CN 107338817 B CN107338817 B CN 107338817B CN 201710713456 A CN201710713456 A CN 201710713456A CN 107338817 B CN107338817 B CN 107338817B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
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Abstract
The invention discloses an anchor bolt dismantling structure in a prestressed anchor bolt foundation and a replacement construction method, wherein the dismantling structure comprises a first dismantling structure for dismantling an unbroken anchor bolt and a second dismantling structure for dismantling a broken anchor bolt, and the first dismantling structure comprises a first transmission nut, a first plane thrust needle roller bearing and a first locking piece which are sequentially sleeved on the unbroken anchor bolt; the second dismantling structure comprises a force transmission rib, and a part of the force transmission rib, which is externally leaked on the upper anchor plate, is sequentially sleeved with a second force transmission nut, a second plane thrust needle roller bearing and a second locking piece; the construction method comprises the following steps: firstly, acquiring anchor bolt tension in a prestressed anchor bolt foundation; secondly, judging whether the anchor bolt in the prestressed anchor bolt foundation is broken or not; thirdly, dismantling a broken anchor bolt; fourthly, dismantling the anchor bolt which is not broken; fifthly, cleaning holes; sixthly, replacing a new anchor bolt; and seventhly, tensioning the new anchor bolt. The invention can quickly and efficiently replace the anchor bolt without dismantling the upper equipment of the prestressed anchor bolt foundation, thereby reducing the construction space.
Description
Technical Field
The invention belongs to the technical field of anchor bolt replacement, and particularly relates to an anchor bolt dismantling structure and a replacement construction method in a prestressed anchor bolt foundation.
Background
The prestressed anchor bolt is used as a linear prestressed tendon, is convenient and quick to construct because cold drawing and welding are not needed, and is widely applied to engineering such as continuous beams, large frame structures, highway or railway large-midspan bridges, nuclear power stations, ground anchors and the like in large-scale hydraulic engineering, wind power engineering, industrial and civil buildings. The tension anchor has the advantages of simple and convenient connection and anchoring, strong adhesion, safe and reliable tension anchoring, convenient construction and the like, saves reinforcing steel bars, and reduces the area and weight of components. However, due to the difference between the manufacturing process and the technical standard of the steel bars in China, partial prestressed anchor bolts currently used by part of enterprises are broken, and great potential safety hazards and great economic loss are caused to the operation of the enterprises. Therefore, an anchor bolt dismantling structure for a prestressed anchor bolt foundation and a replacement construction method for the anchor bolt are absent on the premise that equipment on the upper portion of the prestressed anchor bolt foundation is not dismantled, the anchor bolt is directly taken out of an original concrete foundation, the ground occupied area is small, the site is easy to arrange, the engineering progress is fast, interference factors are few, civilized construction is facilitated, existing facilities around the site can be guaranteed to be intact, and the anchor bolt dismantling structure is green, environment-friendly, safe and reliable.
Disclosure of Invention
The invention aims to solve the technical problem of providing the anchor bolt dismantling structure in the prestressed anchor bolt foundation, which is novel and reasonable in design, directly and quickly and efficiently changes anchor bolts on the original concrete foundation on the premise of not dismantling the equipment on the upper part of the prestressed anchor bolt foundation, has the advantages of short construction period, low manufacturing cost, energy conservation, high efficiency, environmental protection, safety, reliability and convenience in popularization and use, and is environment-friendly.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a structure is demolishd to crab-bolt in prestressed anchorage bolt basis which characterized in that: the device comprises a first dismantling structure for dismantling the anchor bolt which is not broken and a second dismantling structure for dismantling the anchor bolt which is broken, wherein the first dismantling structure is arranged above an upper anchor plate and comprises a first transmission nut, a first plane thrust needle roller bearing and a first locking piece which are sequentially sleeved on the anchor bolt which is not broken; the second dismantling structure comprises a force transmission rib which penetrates through the upper anchor plate and extends into the sleeve to transmit force for the fracture anchor bolt, the force transmission rib is matched with the fracture anchor bolt through a sleeve, a second force transmission nut, a second plane thrust needle roller bearing and a second locking piece are sequentially sleeved on the part, above the upper anchor plate, of the force transmission rib, wrenches are arranged on the first force transmission nut and the second force transmission nut, a fracture end of the fracture anchor bolt is provided with a fracture connecting section, one end, extending into the sleeve, of the force transmission rib is provided with a force transmission connecting section, and the fracture connecting section and the force transmission connecting section are identical in structural size.
Foretell structure is demolishd to crab-bolt among prestressed anchorage bolt basis which characterized in that: the fracture connecting section and the force transmission connecting section are both processed into hexagonal prism structures through an electric spark machine, and sleeves are sleeved on the fracture connecting section and the force transmission connecting section.
Foretell structure is demolishd to crab-bolt among prestressed anchorage bolt basis which characterized in that: and the first locking piece and the second locking piece are both locking nuts.
Foretell structure is demolishd to crab-bolt in prestressed anchorage bolt basis which characterized in that: the first force transmission nut comprises a first stress nut which is sequentially sleeved on the unbroken anchor bolt, the second force transmission nut comprises a second stress nut which is sequentially sleeved on the force transmission rib, and the first stress nut and the second stress nut are identical in structural size.
Foretell structure is demolishd to crab-bolt among prestressed anchorage bolt basis which characterized in that: the number of the wrenches is equal to that of the stressed nuts I or the stressed nuts II, and the wrenches correspond to the stressed nuts I or the stressed nuts II one to one.
Foretell structure is demolishd to crab-bolt among prestressed anchorage bolt basis which characterized in that: the spanner is a hydraulic spanner.
Meanwhile, the invention also discloses a construction method which has simple method steps and reasonable construction and can safely take out the anchor bolt of the anchor bolt for replacement on the premise of not dismantling the equipment on the upper part of the prestressed anchor bolt foundation, and the construction method is characterized by comprising the following steps:
step one, obtaining the anchor bolt tension in the prestressed anchor bolt foundation: detecting the anchor bolt tension in the prestressed anchor bolt foundation by adopting an anchor bolt tension detector, and checking the anchor bolt working state in the prestressed anchor bolt foundation;
step two, judging whether the anchor bolt in the prestressed anchor bolt foundation is broken: judging whether an anchor bolt in the prestressed anchor bolt foundation is broken according to a detection result in the anchor bolt tension detector in the step one, if the anchor bolt tension detected in the anchor bolt tension detector is smaller than a drawing force threshold value, breaking the anchor bolt in the prestressed anchor bolt foundation, and executing a step three; if the anchor bolt tension detected in the anchor bolt tension detector is not smaller than the threshold of the drawing force, the anchor bolt in the prestressed anchor bolt foundation is not broken, and the fourth step is executed;
step three, dismantling the broken anchor bolt, which comprises the following specific processes:
step 301, determining the fracture depth of the fracture anchor bolt and removing the waste anchor bolt steel bars on the upper part of the fracture anchor bolt: observing an image in the sleeve corresponding to the broken anchor bolt by using a camera, and measuring the breaking depth of the broken anchor bolt by using a steel ruler; then, drawing out waste anchor bolt reinforcing steel bars at the upper part of the broken anchor bolt from the sleeve, wherein the waste anchor bolt reinforcing steel bars and the broken anchor bolt form a complete anchor bolt in the prestressed anchor bolt foundation;
step 302, removing the sleeve: dismantling the sleeve corresponding to the broken anchor bolt in the step 301;
step 303, selecting a sleeve and processing a fracture connecting section: determining the type of a sleeve according to the diameter of the sleeve, and then processing a fracture connecting section of the fracture anchor bolt with the fracture depth determined in the step 301 by using an electric spark machine according to the type of the sleeve, wherein the sleeve is of a hollow structure and is a sleeve with an outer circle and an inner hexagon, and the fracture connecting section is of a hexagonal prism structure;
step 304, connecting a force transmission rib: processing one end of a pre-stressed rib according to the type of the sleeve to form a force transmission connecting section of the stressed rib, connecting the sleeve to the fracture connecting section, and connecting the force transmission connecting section of the stressed rib into the sleeve after penetrating through the upper anchor plate, wherein the force transmission connecting section is of a hexagonal prism structure matched with the sleeve;
step 305, detaching the broken anchor bolt: firstly, sleeving a second force transmission nut on the part, which is exposed out of the force transmission rib, above the upper anchor plate in step 304, wherein the second force transmission nut comprises two stressed nuts II which are sequentially sleeved on the force transmission rib, a spanner is reversely installed along the screwing direction of the first stressed nut II after the first stressed nut II is screwed in, a second stressed nut II is screwed in, and a spanner is reversely installed along the screwing direction of the second stressed nut II after the second stressed nut II is screwed in; then, a second plane thrust needle roller bearing and a second locking piece are sequentially arranged on a second stress nut II; finally, reversely screwing the wrench arranged on the first stressed nut II, locking the first stressed nut II, then reversely screwing the wrench arranged on the second stressed nut II, locking the second stressed nut II, and sequentially and alternately working the two wrenches until the broken anchor bolt is rotated out of the lower anchor plate and the broken anchor bolt is extracted from the hole in which the sleeve is arranged;
step four, dismantling the anchor bolt which is not broken, wherein the concrete process is as follows:
step 401, pressure relief of an unbroken anchor bolt: completely relieving the pressure of the upper part of the unbroken anchor bolt to be replaced;
step 402, removing the unbroken anchor: firstly, sleeving a first force transmission nut on a part of an unbroken anchor bolt, which is leaked to the upper part of an upper anchor plate, in step 401, wherein the first force transmission nut comprises two stressed nuts I sleeved on the unbroken anchor bolt in sequence, a wrench is reversely installed along the screwing direction of the first stressed nut I after the first stressed nut I is screwed in, a wrench is reversely installed along the screwing direction of the second stressed nut I after the second stressed nut I is screwed in, and a wrench is reversely installed along the screwing direction of the second stressed nut I after the second stressed nut I is screwed in; then, a first plane thrust needle roller bearing and a first locking piece are sequentially arranged on the first second stressed nut; finally, reversely screwing a wrench arranged on the first stressed nut I, locking the first stressed nut I, then reversely screwing a wrench arranged on the second stressed nut I, locking the second stressed nut I, and sequentially and alternately working the two wrenches until the unbroken anchor bolt is rotated out of the lower anchor plate and is pulled out of the corresponding sleeve;
step 403, removing the sleeve: removing the sleeves corresponding to the unbroken anchors in step 402;
step five, cleaning holes: checking the conditions in the holes corresponding to the sleeves by using a camera, and sucking out residues in the holes by using a dust collector;
step six, replacing a new anchor bolt: installing a new anchor bolt by using a spanner, wherein the lowering process of the new anchor bolt is opposite to the extraction process of the anchor bolt which is not broken, and the new anchor bolt is tightly installed on the T-shaped steel by using a nut after reaching the original elevation;
step seven, tensioning the new anchor bolt: and tensioning the installed new screw rod to a set value.
The construction method is characterized in that: the spanner is a hydraulic spanner, and the first locking piece and the second locking piece are both locking nuts.
Compared with the prior art, the invention has the following advantages:
1. according to the anchor bolt dismantling structure, the force transmission rib is matched with the sleeve to fix the broken anchor bolt, the force transmission rib penetrates through the upper anchor plate and extends into the sleeve, the second force transmission nut, the second plane thrust needle roller bearing and the second locking piece are sleeved on the part, which is outside the force transmission rib and above the upper anchor plate, of the force transmission rib to dismantle the broken anchor bolt, the top of the broken anchor bolt is polished, one end, connected with the sleeve, of the force transmission rib is polished, the structural size of the top of the broken anchor bolt is consistent with that of the polished end of the force transmission rib, the connecting and fixing effects are good, the second force transmission nut is operated by a wrench to dismantle the broken anchor bolt, the construction period is short, the construction cost is low, energy is saved, the efficiency is high, the environment is protected, and the anchor bolt dismantling structure is convenient to popularize and use.
2. According to the anchor bolt dismantling structure, the first force transmission nut, the first plane thrust needle roller bearing and the first locking piece are directly sleeved on the part, leaking out of the unbroken anchor bolt, above the upper anchor plate to dismantle the broken anchor bolt, the first force transmission nut is operated by the wrench to dismantle the unbroken anchor bolt, the anchor bolt is directly replaced on the basis of original concrete quickly and efficiently, reliability and stability are achieved, and the using effect is good.
3. According to the anchor bolt dismantling structure, when the broken anchor bolt or the anchor bolt which is not broken is dismantled, the locking piece can not slide due to the rotation of the force transmission nut at the lower part by using the plane thrust needle bearing, so that the force transmission nut and the whole anchor bolt form a whole, the thrust of the wrench acts on the anchor bolt, the anchor bolt is conveniently reversely taken out, large-scale mechanical equipment is avoided, and the vibration, the noise and the dust are reduced to the maximum extent.
4. The construction method for replacing the anchor bolt is simple in steps, engineering equipment is anchored by replacing the anchor bolt, the anchor bolt tension detector is used for detecting whether the anchor bolt in the prestressed anchor bolt foundation is broken, and according to the fact that whether the tension parameter displayed by the anchor bolt tension detector is lower than a drawing force threshold value, when the anchor bolt is detected to be broken, the reinforcing steel bars and the sleeves of the waste anchor bolt on the upper part of the broken anchor bolt are removed, the broken connecting section is processed, the force transmission bars are connected, the broken anchor bolt is removed, and the connection is stable, rapid and reliable; when the detection crab-bolt is not cracked, directly demolish not cracked crab-bolt, high efficiency, convenient to popularize and use.
In conclusion, the invention has novel and reasonable design, directly and quickly and efficiently replaces the anchor bolt on the original concrete foundation on the premise of not removing the upper equipment of the prestressed anchor bolt foundation, has short construction period, low manufacturing cost, energy conservation, high efficiency, environmental protection, safety, reliability, convenient popularization and use and convenient popularization and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural view of an anchor bolt removing structure employed in the present invention.
Fig. 2 is a schematic view of the structure of fig. 1 with the second force-transmitting nut, the second planar needle thrust bearing and the second locking member removed.
FIG. 3 is a flow chart of the construction method of the present invention.
Description of reference numerals:
1-T section steel; 2-a first fixing nut; 3, lower anchor plate;
4-a second fixing nut; 5-unbroken anchor bolts; 6, sleeving a sleeve;
7-concrete cylinder; 8, mounting an anchor plate; 9-1-a first stress nut;
9-2-a stressed nut II; 10-1-a first planar thrust needle bearing;
10-2-a second plane thrust needle bearing; 11-1 — a first locking member;
11-2 — a second lock; 12-a fracture anchor;
13-a sleeve; and 14, a force transmission rib.
Detailed Description
As shown in fig. 1 and fig. 2, the anchor bolt dismantling structure in the prestressed anchor bolt foundation comprises a first dismantling structure for dismantling an unbroken anchor bolt 5 and a second dismantling structure for dismantling a broken anchor bolt 12, wherein the first dismantling structure is installed above an upper anchor plate 8 and comprises a first force transmission nut, a first plane thrust needle bearing 10-1 and a first locking piece 11-1 which are sequentially sleeved on the unbroken anchor bolt 5; the second demolishs structure and includes that it stretches into for 12 biography power of fracture crab-bolt 14 to pass through upper anchor plate 8 in the sleeve pipe 6, and power transmission muscle 14 passes through sleeve 13 and 12 cooperation of fracture crab-bolt, and the part that power transmission muscle 14 leaks outside upper anchor plate 8 is equipped with second power transmission nut, second plane thrust bearing 10-2 and second locking part 11-2 in proper order, all be provided with the spanner on the first power transmission nut with on the second power transmission nut, the fracture end of fracture crab-bolt 12 is provided with the fracture linkage segment, and the one end that power transmission muscle 14 stretches into in the sleeve pipe 6 is provided with the power transmission linkage segment, the fracture linkage segment with the equal same of structure size of power transmission linkage segment.
It should be noted that, with the continuous update of the engineering equipment, the corresponding continuous update of the installation foundation of the engineering equipment, in practical use, the engineering equipment comprises a fan tower drum, the installation foundation of the fan tower drum is a fan foundation, the fan foundation adopts a prestressed anchor bolt foundation, the fan base stress is increased due to the increased weight, the increased height and the lengthened blades of the fan caused by the increased installed capacity of the single fan, because the existing anchor bolts for connecting the tower drum of the fan and the fan foundation have no corresponding regulation and specification in material quality, the problem of anchor bolt fracture occurs for many times, the purpose of said first dismantling structure is thus to dismantle the unbroken anchor bolt 5, in order to replace the whole with a new one of the better performing materials, the purpose that the structure setting was demolishd to the second is demolishd crab-bolt 12, avoids causing very big potential safety hazard and great economic loss for the fan operation.
In actual use, the bottom of an anchor bolt in the prestressed anchor bolt foundation penetrates through the lower anchor plate 3, the anchor bolt is fixed on the lower anchor plate 3 by adopting a first fixing nut 2 and a second fixing nut 4 at the position where the anchor bolt is connected with the lower anchor plate 3 in the prestressed anchor bolt foundation, the top of the anchor bolt in the prestressed anchor bolt foundation penetrates through the upper anchor plate 8, the anchor bolt is fixed on the upper anchor plate 8 by adopting a fixing nut at the position where the anchor bolt is connected with the upper anchor plate 8 in the prestressed anchor bolt foundation, and then, a concrete column 7 with a hollow structure is formed by adopting concrete pouring; when an anchor bolt in the prestressed anchor bolt foundation is not broken, the anchor bolt in the prestressed anchor bolt foundation is correspondingly an unbroken anchor bolt 5, a fixing nut is removed, a first transmission nut, a first plane thrust needle roller bearing 10-1 and a first locking piece 11-1 are sequentially sleeved on the unbroken anchor bolt 5 positioned above an upper anchor plate 8, the first transmission nut is arranged to be matched with a spanner to rotate the unbroken anchor bolt 5, the first plane thrust needle roller bearing 10-1 is arranged to ensure that the first locking piece 11-1 cannot slide due to the rotation of the first transmission nut at the lower part, so that the first transmission nut and the whole unbroken anchor bolt 5 form a whole, the thrust of the spanner acts on the unbroken anchor bolt 5, and the unbroken anchor bolt 5 is conveniently taken out in a reverse mode;
when the anchor bolt in the prestressed anchor bolt foundation is broken, the anchor bolt in the prestressed anchor bolt foundation is correspondingly a broken anchor bolt 12, a part of the anchor bolt with the broken upper part of the broken anchor bolt 12 is taken out after a fixing nut is removed, the broken end of the broken anchor bolt 12 is provided with a broken connecting section for being matched with a sleeve 6 conveniently, one end of a force transmission rib 14 extending into the sleeve 6 is provided with a force transmission connecting section for being matched with the sleeve 6 conveniently, the structural dimensions of the broken connecting section and the force transmission connecting section are the same for simplifying the structure of the sleeve 6, the sleeve 6 is connected with the broken end of the broken anchor bolt 12 and the force transmission connecting section for being connected with the force transmission rib 14 and the broken anchor bolt 12 into a whole through the sleeve 6, wherein the force transmission rib 14 extends out of an anchor plate 8, a second force transmission nut, a second plane thrust bearing 10-2 and a second locking piece 11-2 are sequentially sleeved on the force transmission rib 14 positioned above the upper anchor plate 8, the second force transmission nut is arranged to be matched with a wrench to rotate a combined body consisting of the force transmission rib 14 and the breaking anchor bolt 12, and the second plane thrust needle bearing 10-2 is arranged to enable the second locking piece 11-2 not to slide due to the rotation of the second force transmission nut on the lower portion, so that the second force transmission nut, the force transmission rib 14 and the breaking anchor bolt 12 form a whole, the thrust of the wrench acts on the combined body consisting of the force transmission rib 14 and the breaking anchor bolt 12, and the breaking anchor bolt 12 is convenient to reversely take out.
In this embodiment, the fracture connection section and the force transmission connection section are both processed into a hexagonal prism structure by an electric spark machine, and the sleeve 13 is sleeved on the fracture connection section and the force transmission connection section.
It should be noted that the fracture connection section and the force transmission connection section are both pre-processed into hexagonal prism structures by an electric spark machine, the sizes of the hexagonal prism structures of the fracture connection section and the force transmission connection section are consistent, and the sleeve 13 is sleeved on the fracture connection section and the force transmission connection section, so that the sleeve 13 preferably adopts a sleeve structure with an outer circle and an inner hexagon.
In this embodiment, the first locking member 11-1 and the second locking member 11-2 are both locking nuts.
In this embodiment, the first force transmission nut includes two first stressed nuts 9-1 successively sleeved on the unbroken anchor bolt 5, the second force transmission nut includes two second stressed nuts 9-2 successively sleeved on the force transmission rib 14, and the first stressed nut 9-1 and the second stressed nut 9-2 are identical in structural size.
In this embodiment, the number of the wrenches is equal to the number of the first stressed nuts 9-1 or the second stressed nuts 9-2, and the wrenches correspond to the first stressed nuts 9-1 or the second stressed nuts 9-2 one by one.
It should be noted that the first force transmission nut comprises two stressed nuts one 9-1 which are sleeved on the unbroken anchor bolt 5 in sequence, and the spanner is in one-to-one correspondence with the stressed nuts one 9-1, so that the two stressed nuts one 9-1 can be locked by alternately using the spanner in a matching manner, and the unbroken anchor bolt 5 can be conveniently and stably screwed out; the second force transmission nut comprises two stressed nuts 9-2 which are sequentially sleeved on the force transmission rib 14, and the purpose that the wrench and the stressed nuts 9-2 are in one-to-one correspondence is to lock the two stressed nuts 9-2 by alternately using the wrench in a matched mode, so that the broken anchor bolt 12 can be conveniently and stably screwed out.
In this embodiment, the wrench is a hydraulic wrench.
In practical use, the hydraulic wrench adopts two sets of hollow hydraulic wrenches with the specification of 13000Nm or two sets of high-power hydraulic wrenches with the specification of 24000 Nm.
A construction method for replacing an anchor bolt as shown in fig. 3 includes the following steps:
step one, obtaining the anchor bolt tension in the prestressed anchor bolt foundation: detecting the tension of an anchor bolt in the prestressed anchor bolt foundation by using an anchor bolt tension detector, and checking the working state of the anchor bolt in the prestressed anchor bolt foundation;
step two, judging whether the anchor bolt in the prestressed anchor bolt foundation is broken: judging whether an anchor bolt in the prestressed anchor bolt foundation is broken according to a detection result in the anchor bolt tension detector in the step one, if the anchor bolt tension detected in the anchor bolt tension detector is smaller than a drawing force threshold value, breaking the anchor bolt in the prestressed anchor bolt foundation, and executing a step three; if the anchor bolt tension detected in the anchor bolt tension detector is not smaller than the threshold of the drawing force, the anchor bolt in the prestressed anchor bolt foundation is not broken, and the fourth step is executed;
step three, dismantling the broken anchor bolt, which comprises the following specific processes:
step 301, determining the fracture depth of the fracture anchor bolt and removing the waste anchor bolt steel bars on the upper part of the fracture anchor bolt: observing an image in the sleeve 6 corresponding to the broken anchor bolt 12 by using a camera, and measuring the breaking depth of the broken anchor bolt 12 by using a steel ruler; then, drawing the waste anchor bolt reinforcing steel bars at the upper part of the broken anchor bolt 12 out of the sleeve 6, wherein the waste anchor bolt reinforcing steel bars and the broken anchor bolt 12 form a complete anchor bolt in the prestressed anchor bolt foundation;
step 302, removing the sleeve: dismantling the sleeve 6 corresponding to the broken anchor bolt 12 in the step 301;
in addition, since the sleeve 6 for separating the anchor bolt from the concrete is shrunk and deformed by the pressure of the concrete and the temperature generated at the time of setting when the concrete is poured, the sleeve 6 in the hole should be removed.
Step 303, selecting a sleeve and processing a fracture connecting section: determining the type of a sleeve 13 according to the diameter of the sleeve 6, then processing a fracture connecting section of the fracture anchor bolt 12 with the fracture depth determined in the step 301 by using an electric spark machine according to the type of the sleeve 13, wherein the sleeve 13 is a hollow sleeve with an outer circle and an inner hexagon, and the fracture connecting section is in a hexagonal prism structure;
step 304, connecting a force transmission rib: processing one end of a pre-stressed rib 14 according to the type of a sleeve 13 to form a force transmission connecting section of the stressed rib 14, connecting the sleeve 13 to the fracture connecting section, and connecting the force transmission connecting section of the stressed rib 14 into the sleeve 13 by penetrating through an upper anchor plate 8, wherein the force transmission connecting section is of a hexagonal prism structure matched with the sleeve 13;
step 305, detaching the broken anchor bolt: firstly, sleeving a second force transmission nut on the part, which is exposed out of the force transmission rib 14 and above the upper anchor plate 8, of the force transmission rib 304, wherein the second force transmission nut comprises two stressed nuts 9-2 which are sleeved on the force transmission rib 14 in sequence, a wrench is reversely installed along the screwing direction of the first stressed nut two 9-2 after the first stressed nut two 9-2 is screwed in, then the second stressed nut two 9-2 is screwed in, and a wrench is reversely installed along the screwing direction of the second stressed nut two 9-2 after the second stressed nut two 9-2 is screwed in; then, a second plane thrust needle roller bearing 10-2 and a second locking piece 11-2 are sequentially installed on a second stress nut II 9-2; finally, reversely screwing a wrench installed on the first second stress nut 9-2 to lock the first second stress nut 9-2, then reversely screwing a wrench installed on the second stress nut 9-2 to lock the second stress nut 9-2, and sequentially and alternately working the two wrenches until the breaking anchor bolt 12 is rotated out of the lower anchor plate 3 and the breaking anchor bolt 12 is pulled out of the hole where the sleeve 6 is located;
step four, dismantling the anchor bolt which is not broken, wherein the concrete process is as follows:
step 401, pressure relief of an unbroken anchor bolt: the upper part of the unbroken anchor bolt 5 to be replaced is completely decompressed;
step 402, removing the unbroken anchor bolt: firstly, sleeving a first force transmission nut on the part, which is exposed above an upper anchor plate 8, of an unbroken anchor bolt 5 in step 401, wherein the first force transmission nut comprises two stressed nuts first 9-1 which are sleeved on the unbroken anchor bolt 5 in sequence, a wrench is reversely installed along the screwing direction of the first stressed nut first 9-1 after the first stressed nut first 9-1 is screwed in, then a wrench is reversely installed along the screwing direction of the second stressed nut first 9-1 after the second stressed nut first 9-1 is screwed in, and then a wrench is reversely installed along the screwing direction of the second stressed nut first 9-1 after the second stressed nut first 9-1 is screwed in; then, a first plane thrust needle roller bearing 10-1 and a first locking piece 11-1 are sequentially arranged on a second stress nut I9-1; finally, reversely screwing a wrench arranged on the first stress nut I9-1 to lock the first stress nut I9-1, then reversely screwing a wrench arranged on the second stress nut I9-1 to lock the second stress nut I9-1, and sequentially and alternately working the two wrenches until the unbroken anchor bolt 5 is rotated out of the lower anchor plate 3 and the unbroken anchor bolt 5 is pulled out of the corresponding sleeve 6;
step 403, removing the sleeve: removing the sleeve 6 corresponding to the unbroken anchor bolt 5 in step 402;
step five, cleaning holes: checking the condition in the hole corresponding to the sleeve 6 by using a camera, and sucking out residues in the hole by using a dust collector;
step six, replacing a new anchor bolt: installing a new anchor bolt by using a spanner, wherein the lowering process of the new anchor bolt is opposite to the extraction process of the anchor bolt 5 which is not broken, and the new anchor bolt is tightly installed on the T-shaped steel 1 by using a nut after reaching the original elevation;
step seven, tensioning the new anchor bolt: and tensioning the installed new screw rod to a set value.
In this embodiment, the wrench is a hydraulic wrench, and the first locking member 11-1 and the second locking member 11-2 are both locking nuts.
When the anchor bolt is used, after a new anchor bolt enters a working site, effective protection must be carried out to prevent corrosion, the anchor bolt is lightly taken and lightly placed in the construction process to prevent damage to the new anchor bolt, the anchor bolt which is not replaced is likely to break in the construction process, and constructors are easily injured when the anchor bolt is popped out after the anchor bolt breaks, so that the anchor bolt which is not replaced must be reinforced and protected before construction, people are prevented from being injured after the anchor bolt is popped out, a bracket can be machined by round steel, a large number of sites are avoided being occupied by ground construction in the construction process, large-scale mechanical equipment is avoided in construction, pollution such as vibration, noise, dust and the like is reduced to the maximum extent, normal life and work of surrounding residents and enterprise units are guaranteed, and the use effect is good.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (5)
1. A construction method for replacing anchor bolts by using anchor bolt dismantling structures in a prestressed anchor bolt foundation comprises a first dismantling structure for dismantling an unbroken anchor bolt (5) and a second dismantling structure for dismantling a broken anchor bolt (12), wherein the first dismantling structure is arranged above an upper anchor plate (8) and comprises a first transmission nut, a first plane thrust needle bearing (10-1) and a first locking piece (11-1) which are sequentially sleeved on the unbroken anchor bolt (5); the second dismantling structure comprises a force transmission rib (14) which penetrates through an upper anchor plate (8) and extends into a sleeve (6) to transmit force for a fracture anchor bolt (12), the force transmission rib (14) is matched with the fracture anchor bolt (12) through a sleeve (13), a second force transmission nut, a second plane thrust needle bearing (10-2) and a second locking piece (11-2) are sequentially sleeved on the part, which is above the upper anchor plate (8), of the force transmission rib (14), wrenches are arranged on the first force transmission nut and the second force transmission nut, a fracture connecting section is arranged at the fracture end of the fracture anchor bolt (12), a force transmission connecting section is arranged at one end, extending into the sleeve (6), of the force transmission rib (14), and the structural sizes of the fracture connecting section and the force transmission connecting section are the same;
the method is characterized in that: the construction method comprises the following steps:
step one, obtaining the anchor bolt tension in the prestressed anchor bolt foundation: detecting the anchor bolt tension in the prestressed anchor bolt foundation by adopting an anchor bolt tension detector, and checking the anchor bolt working state in the prestressed anchor bolt foundation;
step two, judging whether the anchor bolt in the prestressed anchor bolt foundation is broken: judging whether an anchor bolt in the prestressed anchor bolt foundation is broken according to a detection result in the anchor bolt tension detector in the step one, if the anchor bolt tension detected in the anchor bolt tension detector is smaller than a drawing force threshold value, breaking the anchor bolt in the prestressed anchor bolt foundation, and executing a step three; if the anchor bolt tension detected in the anchor bolt tension detector is not smaller than the pulling force threshold value, the anchor bolt in the prestressed anchor bolt foundation is not broken, and the fourth step is executed;
step three, dismantling the broken anchor bolt, which comprises the following specific processes:
step 301, determining the fracture depth of the fracture anchor bolt and removing the waste anchor bolt steel bars on the upper part of the fracture anchor bolt: observing an image in the sleeve (6) corresponding to the fracture anchor bolt (12) by using a camera, and measuring the fracture depth of the fracture anchor bolt (12) by using a steel ruler; then, drawing waste anchor bolt steel bars at the upper part of the fracture anchor bolt (12) out of the sleeve (6), wherein the waste anchor bolt steel bars and the fracture anchor bolt (12) form a complete anchor bolt in the prestress anchor bolt foundation;
step 302, removing the sleeve: dismantling the sleeve (6) corresponding to the broken anchor bolt (12) in the dismantling step 301;
step 303, selecting a sleeve and processing a fracture connecting section: determining the type of a sleeve (13) according to the diameter of the sleeve (6), then, machining a fracture connecting section of the fracture anchor bolt (12) with the fracture depth determined in the step 301 by using an electric spark machine according to the type of the sleeve (13), wherein the sleeve (13) is a hollow sleeve with an outer circle and an inner hexagon, and the fracture connecting section is of a hexagonal prism structure;
step 304, connecting a force transmission rib: processing one end of a pre-transmission rib (14) according to the type of a sleeve (13) to form a transmission connection section of the transmission rib (14), connecting the sleeve (13) on the fracture connection section, and connecting the transmission connection section of the transmission rib (14) in the sleeve (13) by penetrating through an upper anchor plate (8), wherein the transmission connection section is of a hexagonal prism structure matched with the sleeve (13);
step 305, dismantling a fracture anchor: firstly, sleeving a second force transmission nut on the part, leaking out of the force transmission rib (14), above the upper anchor plate (8) in step 304, of the force transmission rib, wherein the second force transmission nut comprises two stressed nuts II (9-2) sleeved on the force transmission rib (14) in sequence, a wrench is reversely installed along the screwing direction of the first stressed nut II (9-2) after the first stressed nut II (9-2) is screwed in, then the second stressed nut II (9-2) is screwed in, and a wrench is reversely installed along the screwing direction of the second stressed nut II (9-2) after the second stressed nut II (9-2) is screwed in; then, a second plane thrust needle roller bearing (10-2) and a second locking piece (11-2) are sequentially installed on a second stress nut II (9-2); finally, reversely screwing a wrench installed on the first stressed nut II (9-2), locking the first stressed nut II (9-2), then reversely screwing a wrench installed on the second stressed nut II (9-2), locking the second stressed nut II (9-2), and sequentially and alternately working the two wrenches until the broken anchor bolt (12) is rotated out of the lower anchor plate (3) and the broken anchor bolt (12) is extracted from the hole where the sleeve (6) is located;
step four, dismantling the unbroken anchor bolt, which comprises the following specific processes:
step 401, pressure relief of an unbroken anchor bolt: completely relieving the pressure of the upper part of the unbroken anchor bolt (5) to be replaced;
step 402, removing the unbroken anchor: firstly, sleeving a first force transmission nut on a part of an unbroken anchor bolt (5) which is leaked above an upper anchor plate (8) in step 401, wherein the first force transmission nut comprises two stressed nuts (9-1) which are sleeved on the unbroken anchor bolt (5) in sequence, a wrench is reversely installed along the screwing direction of the first stressed nut (9-1) after the first stressed nut (9-1) is screwed in, then a second stressed nut (9-1) is screwed in, and a wrench is reversely installed along the screwing direction of the second stressed nut (9-1) after the second stressed nut (9-1) is screwed in; then, a first plane thrust needle roller bearing (10-1) and a first locking piece (11-1) are sequentially installed on a second stressed nut I (9-1); finally, reversely screwing a wrench installed on the first stressed nut I (9-1), locking the first stressed nut I (9-1), then reversely screwing a wrench installed on the second stressed nut I (9-1), locking the second stressed nut I (9-1), and sequentially and alternately working the two wrenches until the unbroken anchor bolt (5) is rotated out of the lower anchor plate (3) and the unbroken anchor bolt (5) is pulled out of the corresponding sleeve (6);
step 403, removing the sleeve: removing the sleeve (6) corresponding to the unbroken anchor (5) in step 402;
step five, cleaning holes: checking the conditions in the holes corresponding to the sleeves (6) by using a camera, and sucking out residues in the holes by using a dust collector;
step six, replacing a new anchor bolt: installing a new anchor bolt by using a spanner, wherein the lowering process of the new anchor bolt is opposite to the drawing process of the anchor bolt (5) which is not broken, and the new anchor bolt is tightly installed on the T-shaped steel (1) by adopting a nut after reaching the original elevation;
step seven, tensioning the new anchor bolt: and tensioning the installed new screw rod to a set value.
2. The construction method for replacing an anchor bolt using an anchor bolt demolishing structure in a prestressed anchor bolt foundation as claimed in claim 1, wherein: the fracture connecting section with pass power linkage segment all through electric spark machine tooling for hexagonal prism structure, sleeve (13) suit in the fracture connecting section with pass on the power linkage segment.
3. The construction method for replacing an anchor bolt using an anchor bolt demolishing structure in a prestressed anchor bolt foundation as claimed in claim 1, wherein: the first force transmission nut comprises a first stressed nut (9-1) which is sleeved on the unbroken anchor bolt (5) in sequence, the second force transmission nut comprises a second stressed nut (9-2) which is sleeved on the force transmission rib (14) in sequence, and the first stressed nut (9-1) and the second stressed nut (9-2) are identical in structural size.
4. The construction method for replacing an anchor bolt using an anchor bolt demolishing structure in a prestressed anchor bolt foundation as claimed in claim 1, wherein: the number of the wrenches is equal to that of the stressed nuts I (9-1) or the stressed nuts II (9-2), and the wrenches correspond to the stressed nuts I (9-1) or the stressed nuts II (9-2) one by one.
5. The construction method for replacing an anchor bolt using an anchor bolt demolishing structure in a prestressed anchor bolt foundation as claimed in claim 1, wherein: the spanner is a hydraulic spanner, and the first locking piece (11-1) and the second locking piece (11-2) are both locking nuts.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710713456.6A CN107338817B (en) | 2017-08-18 | 2017-08-18 | Anchor bolt dismantling structure in prestressed anchor bolt foundation and replacement construction method |
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| CN201710713456.6A CN107338817B (en) | 2017-08-18 | 2017-08-18 | Anchor bolt dismantling structure in prestressed anchor bolt foundation and replacement construction method |
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| CN107338817B true CN107338817B (en) | 2022-09-13 |
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| CN113123377A (en) * | 2021-05-12 | 2021-07-16 | 中国十五冶金建设集团有限公司 | Method for replacing anchor plate bolt of foundation of wind driven generator by excavating roadway |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101397796A (en) * | 2008-09-12 | 2009-04-01 | 葛培中 | Construction method of prestressed anchor rod static pressure pile |
| CN203925895U (en) * | 2014-07-07 | 2014-11-05 | 闵怡红 | For wind power generation stepped crab-bolt Changable type basis |
| CN105155571B (en) * | 2015-08-20 | 2017-02-01 | 江苏金海新能源科技有限公司 | Replaceable prestressed anchor bolt assembly and mounting and replacement construction method thereof |
| CN205576962U (en) * | 2016-03-29 | 2016-09-14 | 江苏金海新能源科技有限公司 | Removable prestressed anchorage of improvement ties device |
| CN106320367B (en) * | 2016-10-11 | 2018-08-24 | 北京健安诚岩土工程有限公司 | The prestressed rock anchor rod foundation of replaceable anchor pole |
| CN206971293U (en) * | 2017-08-18 | 2018-02-06 | 陕西格瑞特电力工程有限公司 | A kind of crab-bolt dismounting structure in prestressed bolt basis |
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