CN112878712A - Compression shear foundation bolt pre-embedding installation device and construction method thereof - Google Patents
Compression shear foundation bolt pre-embedding installation device and construction method thereof Download PDFInfo
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- 238000009434 installation Methods 0.000 title claims abstract description 45
- 230000006835 compression Effects 0.000 title claims abstract description 32
- 238000007906 compression Methods 0.000 title claims abstract description 32
- 238000010276 construction Methods 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 120
- 239000010959 steel Substances 0.000 claims description 120
- 238000013461 design Methods 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 25
- 238000009415 formwork Methods 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 11
- 239000004746 geotextile Substances 0.000 claims description 9
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 230000036571 hydration Effects 0.000 claims description 3
- 238000006703 hydration reaction Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000011900 installation process Methods 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 125000003003 spiro group Chemical group 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 3
- 238000009430 construction management Methods 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
- E04G21/185—Means for positioning building parts or elements for anchoring elements or elements to be incorporated in the structure
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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
- E02D27/44—Foundations for machines, engines or ordnance
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4157—Longitudinally-externally threaded elements extending from the concrete or masonry, e.g. anchoring bolt with embedded head
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
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Abstract
The invention discloses a compression shear foundation bolt pre-embedding installation device and a construction method thereof. The invention also discloses a construction method of the embedded mounting device of the foundation bolt of the compression shear machine, which is used for completing the mounting construction of the foundation bolt. The invention can realize the accurate control of the installation of the foundation bolt and has the advantages of simple processing and manufacture, convenient installation and removal and construction management cost saving.
Description
Technical Field
The invention relates to the field of compression shear foundation construction, in particular to a compression shear foundation bolt embedded installation device and a construction method thereof.
Background
The multifunctional press shear is equipment for mechanical test and mainly performs structural test. The equipment is heavy and high in installation precision. Particularly, the foundation bolt of the fixing equipment has the characteristics of large diameter and high accuracy of embedded size. The relative displacement deviation between the centers of the same group of bolts is less than or equal to 1mm, the relative displacement deviation between the centers of the same group of bolts and the axis is less than or equal to 2mm, the relative displacement deviation between each group of bolts and the axis is less than or equal to 5mm, the top standard height deviation of the bolts is +5 to +10mm, and the verticality deviation of the bolts is L/450. Therefore, accurate positioning of the embedded foundation bolts is realized, and the key for ensuring the installation quality of equipment is realized.
The common method for pre-embedding, installing and fixing the foundation bolt comprises the following steps: wood formwork positioning and sleeve plate positioning. The wooden form positioning method is generally to fix and position the upper end of the foundation bolt by a wooden form, and the lower end is firmly welded with a steel bar by a tie bar, so that the wooden form positioning method is suitable for small-size bolts with small diameter and short length. The sleeve plate positioning method adopts the steps of perforating a processed embedded steel plate, directly enabling an embedded bolt to penetrate through a hole position of the sleeve plate, and controlling the precision of the foundation bolt through the sleeve plate, but the sleeve plate positioning method is heavy, high in cost and limited in application range.
The invention aims to provide a compression shear foundation bolt pre-embedding and installing device, which solves the problem that the foundation bolt of the compression shear cannot be accurately controlled during installation in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a pre-buried installation device of compression shear machine rag bolt which characterized in that: including the support of frame type structure, the location channel-section steel of frame type structure, the support is higher than the concrete top surface and keeps flat, and a plurality of landing legs of support bottom fixedly connected with, each landing leg downwardly penetrates to the concrete respectively in, and the lower extreme of each landing leg is fixed in concrete foundation base respectively, the location channel-section steel lies and erects on the support, and contacts department fixed connection between location channel-section steel and the support, is equipped with a plurality of vertical through-holes in the location channel-section steel, has passed rag bolt in every vertical through-hole respectively, and during every rag bolt lower extreme penetrated to the concrete of support below respectively, still passed respectively in every vertical through-hole and installed the nut, the nut spiro union suit is in the rag bolt that corresponds vertical through-hole.
The embedded installation device of the foundation bolt of the compression shear is characterized in that: the positioning channel steel is of a frame structure formed by welding transverse channel steel and longitudinal channel steel, and at least one of the transverse channel steel and the longitudinal channel steel is provided with a vertical through hole according to a design requirement position for mounting a foundation bolt.
The embedded installation device of the foundation bolt of the compression shear is characterized in that: the support is a frame-shaped structure formed by welding a transverse support rod and a longitudinal support rod, and the positioning channel steel is horizontally erected on each longitudinal support rod of the support.
The embedded installation device of the foundation bolt of the compression shear is characterized in that: the lower end of each supporting leg is fixedly connected with a supporting leg steel plate, and each supporting leg steel plate is fixed on the concrete foundation base layer through an expansion bolt.
The embedded installation device of the foundation bolt of the compression shear is characterized in that: each supporting leg is further fixedly connected with an inclined strut, the lower end of each inclined strut is fixedly connected with a supporting leg steel plate, and the supporting leg steel plates are fixed on the concrete foundation base layer through expansion bolts.
The embedded installation device of the foundation bolt of the compression shear is characterized in that: the outer diameter of the nut is matched with the inner diameter of the vertical through hole which penetrates through the nut, and the nut is screwed and sleeved on the corresponding foundation bolt to lock and fix the foundation bolt on the positioning channel steel.
A construction method of a compression shear foundation bolt pre-embedded installation device is characterized by comprising the following steps: the method comprises the following steps:
step 1: according to design requirements, manufacturing a positioning channel steel of a frame structure for positioning foundation bolt embedded parts, wherein the process is as follows:
selecting transverse and longitudinal channel steel, wherein the type of the channel steel is determined by the specification of a foundation bolt to be embedded, and selecting the type with the strength and rigidity capable of meeting the requirement of the bolt; welding transverse and longitudinal channel steel into a positioning channel steel with a frame-shaped structure according to the plane position of the foundation bolt of a design drawing, and drilling a vertical through hole for installing the foundation bolt on the positioning channel steel according to the requirements of the design drawing;
step 2: according to design requirements, releasing a foundation bolt position line on the positioning channel steel, and releasing a foundation bolt positioning line and an installation control line on the concrete foundation base layer according to the designed foundation bolt plane position;
and step 3: according to design requirements, the manufacturing and installation of the bracket are completed, and the process is as follows:
selecting section steel as longitudinal and transverse support rods and support legs of the support, wherein the type of the section steel meets foundation bolt positioning frame load and construction load; welding longitudinal and transverse support rods and support legs on a concrete foundation base layer according to a design drawing to manufacture a support, wherein the longitudinal and transverse support rods of the support are higher than the upper surface of the concrete foundation base layer, the support legs of the support are fixed on the concrete foundation base layer by using expansion bolts and support leg steel plates, and the support legs are reinforced by using inclined struts; the plane position and the elevation of the bracket meet the design requirements, and the strength and the rigidity of the bracket meet the load of a foundation bolt positioning frame and the construction load;
and 4, step 4: hoisting the foundation bolt embedded part positioning channel steel in place, wherein the process is as follows:
after the foundation bolt embedded part positioning channel steel is qualified through inspection, the foundation bolt embedded part positioning channel steel is positioned on the manufactured support by using a crane, and the plane position of the foundation bolt embedded part positioning channel steel is measured and adjusted to the position of the foundation bolt by using a control line;
and 5: the foundation bolt embedded part positioning channel steel is installed, debugged and fixed, and the process is as follows:
the foundation bolt penetrates through a reserved vertical through hole of the positioning channel steel, the foundation bolt is locked and fixed by a nut, and the top elevation of the foundation bolt is measured and adjusted by a precision measuring instrument; after the foundation bolts are tightly fixed on the positioning channel steel, fine adjustment of the plane position is carried out, and the theodolite is used for measuring and adjusting the plane position of the positioning channel steel, so that a control line on the positioning channel steel is superposed with a control line on the concrete foundation base layer; after the position of the foundation bolt is retested, connecting the positioning channel steel and the bracket into a whole, and wrapping the foundation bolt by using a plastic film and geotextile for protection;
step 6: binding and installing reinforcing steel bars on the concrete foundation base layer, wherein the reinforcing steel bars do not touch foundation bolts and supporting legs of the support as much as possible in the installation process;
and 7: finishing formwork erection and reinforcement on concrete foundation integration, and controlling from the aspects of formwork material selection, formwork construction design, formwork installation construction, reinforcing steel bar protection layer control and concrete pouring according to design requirements;
and 8: completing concrete pouring on the concrete foundation base layer to form concrete;
and step 9: the support is separated from its legs and the locating form and support are removed.
The construction method of the compression shear foundation bolt embedded installation device is characterized by comprising the following steps of: and 8, adopting shrinkage-compensating commercial concrete, wherein the slump of the premixed concrete is as follows: 180 plus or minus 20 mm; the sand rate is: 33 percent, the content of chloride ions in the concrete is less than or equal to 0.06 percent, and the dosage of the cement is more than or equal to 300Kg/m 3; the particle size of the crushed stone for the coarse aggregate is as follows: 5-25mm, the mud content is not more than 1, the fine aggregate is medium sand, the fineness modulus is more than 2.3, and the fly ash is added into the concrete to reduce the hydration heat and improve the workability.
The construction method of the compression shear foundation bolt embedded installation device is characterized by comprising the following steps of: in the step 8, an inclined plane layering mode is adopted during pouring, a concrete automobile pump is used for pouring, pouring is continuously pushed from one side of a short edge of the foundation to the other side, and a one-time continuous pouring scheme is adopted; when the concrete is poured in layers, the thickness of each layer is about 400mm, the inclined plane is formed by pumping concrete and naturally flowing, and the gradient is controlled to be 1: 3, assisting insertion type vibration, and gradually moving upwards from the bottom layer of the pouring layer; the concrete is maintained by wet covering with geotextile, and the concrete is maintained by sprinkling water within 12 hours after the concrete surface is poured, wherein the maintenance time is not less than 14 days.
The construction method of the compression shear foundation bolt embedded installation device is characterized by comprising the following steps of: the specific process in the step 9 is as follows: removing the film and the geotextile protected by the foundation bolt, and screwing out a nut fixed on the foundation bolt of the positioning channel steel; leveling the upper surface of the concrete, cutting off all the supporting legs of the support, carefully lifting the positioning channel steel and the support by using a crane, and brushing anti-rust paint on the section of the supporting leg left in the concrete for protection.
According to the invention, the foundation bolts are embedded in the compression shear machine under the control of the positioning channel steel and the support, so that the accurate installation control of the foundation bolts is realized. The foundation bolt embedded support and the positioning channel steel are stable and good in rigidity, have a good fixing effect on the bolts, and the embedded bolts cannot loosen and deform in the concrete pouring process.
The invention has the following beneficial effects:
according to the invention, the accurate control of the installation of the foundation bolt can be realized through the positioning channel steel and the bracket, the foundation bolt fixing device has the advantages of simple processing and manufacturing, convenience in installation and dismounting, stability and good rigidity, has a good fixing effect on the bolt, is low in on-site processing and manufacturing cost, can be repeatedly used through the positioning channel steel and the bracket, can effectively save the construction management cost, and provides a new supporting device and a new process system for the high-precision installation of the foundation bolt of the compression shear machine.
Drawings
FIG. 1 is a top view of the structure of the present invention.
Fig. 2 is a front cross-sectional view of the inventive structure.
FIG. 3 is a schematic view of the anchor bolt and nut assembly of the present invention.
Fig. 4 is a schematic view of the leg structure of the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in fig. 1 to 4, the anchor bolt embedded installation device of the compression shear of the present invention comprises a bracket 4 of a frame structure and a positioning channel steel 2 of the frame structure, wherein:
the bracket 4 is a frame-shaped structure composed of two transverse bracket rods 42 and two longitudinal bracket rods 41 which are respectively fixed on the two transverse bracket rods 42 in an erection welding manner. The support 4 is entirely laid flat above the top surface of the concrete 5 with the longitudinal support rods 41 erected on the transverse support rods 42. In the support 4, a plurality of support legs 43 are fixedly connected to the bottom of the transverse support rod 42, and each support leg 43 penetrates downwards into the concrete 5. The lower end of each supporting leg 43 is fixedly connected with a supporting leg steel plate 45, and the supporting leg steel plates 45 are fixed on the foundation base 6 of the concrete 5 through expansion bolts 44. And one side of each supporting leg 43 is also fixedly connected with an inclined strut 46 extending obliquely downwards, the lower end of the inclined strut 46 is also fixedly connected with a supporting leg steel plate, and the supporting leg steel plate is fixed on the foundation base layer 6 of the concrete 5 through an expansion bolt.
The positioning channel steel 2 is of a frame structure formed by two transverse channel steels 22 and three longitudinal channel steels 21 welded and fixed between the two transverse channel steels 22, the positioning channel steel 2 is integrally laid on two longitudinal support rods 41 in the support 4, and the positioning channel steel 2 is in contact with the longitudinal support rods 41 through the transverse channel steels 22 and is welded and fixed at the contact position. According to design requirements, a transverse channel steel 22 and a longitudinal channel steel 21 of the positioning channel steel 2 are respectively provided with vertical through holes at positions of the design requirements, each vertical through hole penetrates through the foundation bolt 1, and the lower end of each foundation bolt 1 penetrates into the concrete 5. Every vertical through-hole of location channel-section steel 2 still passes respectively and installs nut 3, and the external diameter and the vertical through-hole internal diameter of nut 3 match, and the nut 3 spiral shell closes the 1 part of suit in the rag bolt that corresponds vertical through-hole, makes rag bolt 1 can lock and be fixed in the location channel-section steel.
The invention relates to a construction method of a compression shear foundation bolt embedded installation device, which comprises the following steps:
step 1: according to design requirements, a positioning channel steel 2 of a frame structure for positioning foundation bolt embedded parts is manufactured, and the process is as follows:
selecting transverse and longitudinal channel steel 22 and 21, wherein the type number of the channel steel is determined by the specification of an anchor bolt 1 to be embedded, and selecting the type with the strength and the rigidity capable of meeting the requirements of the anchor bolt 1; welding transverse and longitudinal channel steels 22 and 21 into a positioning channel steel 2 with a frame-shaped structure according to the plane position of the foundation bolt 1 on the design drawing, and drilling a vertical through hole for installing the foundation bolt 1 on the positioning channel steel 2 according to the design drawing requirement;
step 2: according to design requirements, releasing a foundation bolt position line on the positioning channel steel 2, and releasing a foundation bolt positioning line and an installation control line on the concrete foundation base 6 according to the designed plane position of the foundation bolt 1;
and step 3: according to the design requirement, the manufacturing and installation of the bracket 4 are completed, and the process is as follows:
selecting section steel as longitudinal and transverse support rods 41 and 42 and a support leg 43 of the support 4, wherein the type of the section steel meets the positioning frame load and the construction load of the foundation bolt 1; welding longitudinal and transverse support rods 41 and 42 and supporting legs 43 on a concrete foundation base layer 6 according to a design drawing to manufacture a support 4, enabling the longitudinal and transverse support rods 41 and 42 of the support 4 to be higher than the upper surface of the concrete foundation base layer 6, fixing the supporting legs 43 of the support 4 on the concrete foundation base layer 6 by using expansion bolts 44 and supporting leg steel plates 45, and reinforcing the supporting legs 43 by using inclined struts 46; the plane position and the elevation of the support 4 meet the design requirements, and the strength and the rigidity of the support 4 meet the positioning frame load and the construction load of the foundation bolt 1;
and 4, step 4: the foundation bolt embedded part positioning channel steel 2 is hoisted in place, and the process is as follows:
after the foundation bolt embedded part positioning channel steel 2 is qualified through inspection, the foundation bolt embedded part positioning channel steel is positioned on the manufactured support 4 by using a crane, and the plane position of the foundation bolt embedded part positioning channel steel is measured and adjusted to the position of the foundation bolt by using a control line;
and 5: the foundation bolt embedded part positioning channel steel 2 is installed, debugged and fixed, and the process is as follows:
the foundation bolt 1 penetrates through a reserved vertical through hole of the positioning channel steel 2, the foundation bolt 1 is locked and fixed by a nut 3, and the top elevation of the foundation bolt 1 is measured and adjusted by a precision measuring instrument; after the foundation bolts 1 are tightly fixed on the positioning channel steel 2, fine adjustment of the plane position is carried out, and the theodolite is used for measuring and adjusting the plane position of the positioning channel steel 2, so that the control line 23 on the positioning channel steel 2 is superposed with the control line on the concrete foundation base 6; after the position of the foundation bolt 1 is retested, connecting the positioning channel steel 2 and the bracket 1 into a whole, and wrapping the foundation bolt 1 by adopting a plastic film and geotextile for protection;
step 6: finishing the binding and installation of the steel bars on the concrete foundation layer 6, wherein the foundation bolts 1 and the supporting legs 43 of the bracket are not touched as much as possible in the installation process;
and 7: the formwork erection and reinforcement is completed on the concrete foundation 6 integration, and the control is performed from the aspects of formwork material selection, formwork construction design, formwork installation construction, reinforcing steel bar protection layer control and concrete pouring according to the design requirement;
and 8: completing concrete pouring on the concrete foundation layer 6 to form concrete 5;
and step 9: the support 4 is separated from its legs 43 and the locating forms and support are removed.
In step 8 of the invention, the shrinkage-compensating commercial concrete is adopted, and the slump of the premixed concrete is as follows: 180 plus or minus 20 mm; the sand rate is: 33 percent, the content of chloride ions in the concrete is less than or equal to 0.06 percent, and the dosage of the cement is more than or equal to 300Kg/m 3; the particle size of the crushed stone for the coarse aggregate is as follows: 5-25mm, the mud content is not more than 1, the fine aggregate is medium sand, the fineness modulus is more than 2.3, and the fly ash is added into the concrete to reduce the hydration heat and improve the workability.
In step 8, an inclined plane layering mode is adopted during pouring, a concrete automobile pump is used for pouring, pouring is continuously pushed from one side of a short edge of the foundation to the other side, and a one-time continuous pouring scheme is adopted; when the concrete is poured in layers, the thickness of each layer is about 400mm, the inclined plane is formed by pumping concrete and naturally flowing, and the gradient is controlled to be 1: 3, assisting insertion type vibration, and gradually moving upwards from the bottom layer of the pouring layer; the concrete is maintained by wet covering with geotextile, and the concrete is maintained by sprinkling water within 12 hours after the concrete surface is poured, wherein the maintenance time is not less than 14 days.
The specific process in step 9 of the invention is as follows: removing the film and the geotextile protected by the foundation bolt 1, and screwing out the nut 3 fixed on the foundation bolt 1 of the positioning channel steel 2; leveling the upper surface of the concrete, cutting off all the supporting legs 43 of the bracket 4, carefully lifting the positioning channel steel 2 and the bracket 4 by using a crane, and brushing the anti-rust paint on the sections of the supporting legs 43 left in the concrete 5 for protection.
The embodiments of the present invention are described only for the preferred embodiments of the present invention, and not for the limitation of the concept and scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall into the protection scope of the present invention, and the technical content of the present invention which is claimed is fully set forth in the claims.
Claims (10)
1. The utility model provides a pre-buried installation device of compression shear machine rag bolt which characterized in that: including the support of frame type structure, the location channel-section steel of frame type structure, the support is higher than the concrete top surface and keeps flat, and a plurality of landing legs of support bottom fixedly connected with, each landing leg downwardly penetrates to the concrete respectively in, and the lower extreme of each landing leg is fixed in concrete foundation base respectively, the location channel-section steel lies and erects on the support, and contacts department fixed connection between location channel-section steel and the support, is equipped with a plurality of vertical through-holes in the location channel-section steel, has passed rag bolt in every vertical through-hole respectively, and during every rag bolt lower extreme penetrated to the concrete of support below respectively, still passed respectively in every vertical through-hole and installed the nut, the nut spiro union suit is in the rag bolt that corresponds vertical through-hole.
2. The embedded installation device of foundation bolts of the compression shear machine as claimed in claim 1, characterized in that: the positioning channel steel is of a frame structure formed by welding transverse channel steel and longitudinal channel steel, and at least one of the transverse channel steel and the longitudinal channel steel is provided with a vertical through hole according to a design requirement position for mounting a foundation bolt.
3. The embedded installation device of foundation bolts of the compression shear machine as claimed in claim 1, characterized in that: the support is a frame-shaped structure formed by welding a transverse support rod and a longitudinal support rod, and the positioning channel steel is horizontally erected on each longitudinal support rod of the support.
4. The embedded installation device of foundation bolts of the compression shear machine as claimed in claim 1, characterized in that: the lower end of each supporting leg is fixedly connected with a supporting leg steel plate, and each supporting leg steel plate is fixed on the concrete foundation base layer through an expansion bolt.
5. The embedded installation device of foundation bolts of the compression shear machine as claimed in claim 1, characterized in that: each supporting leg is further fixedly connected with an inclined strut, the lower end of each inclined strut is fixedly connected with a supporting leg steel plate, and the supporting leg steel plates are fixed on the concrete foundation base layer through expansion bolts.
6. The embedded installation device of foundation bolts of the compression shear machine as claimed in claim 1, characterized in that: the outer diameter of the nut is matched with the inner diameter of the vertical through hole which penetrates through the nut, and the nut is screwed and sleeved on the corresponding foundation bolt to lock and fix the foundation bolt on the positioning channel steel.
7. A construction method of the embedded installation device of the foundation bolt of the compression shear machine according to claim 1, which is characterized in that: the method comprises the following steps:
step 1: according to design requirements, manufacturing a positioning channel steel of a frame structure for positioning foundation bolt embedded parts, wherein the process is as follows:
selecting transverse and longitudinal channel steel, wherein the type of the channel steel is determined by the specification of a foundation bolt to be embedded, and selecting the type with the strength and rigidity capable of meeting the requirement of the bolt; welding transverse and longitudinal channel steel into a positioning channel steel with a frame-shaped structure according to the plane position of the foundation bolt of a design drawing, and drilling a vertical through hole for installing the foundation bolt on the positioning channel steel according to the requirements of the design drawing;
step 2: according to design requirements, releasing a foundation bolt position line on the positioning channel steel, and releasing a foundation bolt positioning line and an installation control line on the concrete foundation base layer according to the designed foundation bolt plane position;
and step 3: according to design requirements, the manufacturing and installation of the bracket are completed, and the process is as follows:
selecting section steel as longitudinal and transverse support rods and support legs of the support, wherein the type of the section steel meets foundation bolt positioning frame load and construction load; welding longitudinal and transverse support rods and support legs on a concrete foundation base layer according to a design drawing to manufacture a support, wherein the longitudinal and transverse support rods of the support are higher than the upper surface of the concrete foundation base layer, the support legs of the support are fixed on the concrete foundation base layer by using expansion bolts and support leg steel plates, and the support legs are reinforced by using inclined struts; the plane position and the elevation of the bracket meet the design requirements, and the strength and the rigidity of the bracket meet the load of a foundation bolt positioning frame and the construction load;
and 4, step 4: hoisting the foundation bolt embedded part positioning channel steel in place, wherein the process is as follows:
after the foundation bolt embedded part positioning channel steel is qualified through inspection, the foundation bolt embedded part positioning channel steel is positioned on the manufactured support by using a crane, and the plane position of the foundation bolt embedded part positioning channel steel is measured and adjusted to the position of the foundation bolt by using a control line;
and 5: the foundation bolt embedded part positioning channel steel is installed, debugged and fixed, and the process is as follows:
the foundation bolt penetrates through a reserved vertical through hole of the positioning channel steel, the foundation bolt is locked and fixed by a nut, and the top elevation of the foundation bolt is measured and adjusted by a precision measuring instrument; after the foundation bolts are tightly fixed on the positioning channel steel, fine adjustment of the plane position is carried out, and the theodolite is used for measuring and adjusting the plane position of the positioning channel steel, so that a control line on the positioning channel steel is superposed with a control line on the concrete foundation base layer; after the position of the foundation bolt is retested, connecting the positioning channel steel and the bracket into a whole, and wrapping the foundation bolt by using a plastic film and geotextile for protection;
step 6: binding and installing reinforcing steel bars on the concrete foundation base layer, wherein the reinforcing steel bars do not touch foundation bolts and supporting legs of the support as much as possible in the installation process;
and 7: the method comprises the following steps of completing formwork erection and reinforcement on concrete foundation base layer integration, and controlling from the aspects of formwork material selection, formwork construction design, formwork installation construction, reinforcing steel bar protection layer control and concrete pouring according to design requirements;
and 8: completing concrete pouring on the concrete foundation base layer to form concrete;
and step 9: the support is separated from its legs and the locating form and support are removed.
8. The construction method of the embedded installation device of the foundation bolt of the compression shear machine according to claim 7, characterized in that: and 8, adopting shrinkage-compensating commercial concrete, wherein the slump of the premixed concrete is as follows: 180 plus or minus 20 mm; the sand rate is: 33 percent, the content of chloride ions in the concrete is less than or equal to 0.06 percent, and the dosage of the cement is more than or equal to 300Kg/m 3; the particle size of the crushed stone for the coarse aggregate is as follows: 5-25mm, the mud content is not more than 1, the fine aggregate is medium sand, the fineness modulus is more than 2.3, and the fly ash is added into the concrete to reduce the hydration heat and improve the workability.
9. The construction method of the embedded installation device of the foundation bolt of the compression shear machine according to claim 7, characterized in that: in the step 8, an inclined plane layering mode is adopted during pouring, a concrete automobile pump is used for pouring, pouring is continuously pushed from one side of a short edge of the foundation to the other side, and a one-time continuous pouring scheme is adopted; when the concrete is poured in layers, the thickness of each layer is about 400mm, the inclined plane is formed by pumping concrete and naturally flowing, and the gradient is controlled to be 1: 3, assisting insertion type vibration, and gradually moving upwards from the bottom layer of the pouring layer; the concrete is maintained by wet covering with geotextile, and the concrete is maintained by sprinkling water within 12 hours after the concrete surface is poured, wherein the maintenance time is not less than 14 days.
10. The construction method of the embedded installation device of the foundation bolt of the compression shear machine according to claim 7, characterized in that: the specific process in the step 9 is as follows: removing the film and the geotextile protected by the foundation bolt, and screwing out a nut fixed on the foundation bolt of the positioning channel steel; leveling the upper surface of the concrete, cutting off all the supporting legs of the support, carefully lifting the positioning channel steel and the support by using a crane, and brushing anti-rust paint on the section of the supporting leg left in the concrete for protection.
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| CN113338328A (en) * | 2021-06-19 | 2021-09-03 | 中国二十二冶集团有限公司 | Embedding structure and embedding method for convex foundation surface bracket for fixing embedded bolt |
| CN113957757A (en) * | 2021-11-16 | 2022-01-21 | 中国二十冶集团有限公司 | Track bolt positioning device and track bolt construction method |
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Application publication date: 20210601 |