CN114575372A - High-rise steel structure deep foundation pit raft foundation anchor bolt pre-embedding construction method - Google Patents
High-rise steel structure deep foundation pit raft foundation anchor bolt pre-embedding construction method Download PDFInfo
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- CN114575372A CN114575372A CN202210477876.XA CN202210477876A CN114575372A CN 114575372 A CN114575372 A CN 114575372A CN 202210477876 A CN202210477876 A CN 202210477876A CN 114575372 A CN114575372 A CN 114575372A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 33
- 239000010959 steel Substances 0.000 title claims abstract description 33
- 238000010276 construction Methods 0.000 title claims abstract description 31
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 23
- 239000011241 protective layer Substances 0.000 claims abstract description 14
- 238000005452 bending Methods 0.000 claims description 10
- 239000010410 layer Substances 0.000 claims description 9
- XBWAZCLHZCFCGK-UHFFFAOYSA-N 7-chloro-1-methyl-5-phenyl-3,4-dihydro-2h-1,4-benzodiazepin-1-ium;chloride Chemical compound [Cl-].C12=CC(Cl)=CC=C2[NH+](C)CCN=C1C1=CC=CC=C1 XBWAZCLHZCFCGK-UHFFFAOYSA-N 0.000 claims description 4
- 230000007306 turnover Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 239000011111 cardboard Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009739 binding Methods 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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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
Abstract
The invention provides a construction method for embedding foundation bolts of a raft foundation of a deep foundation pit of a high-rise steel structure, which comprises the following steps of: the vertically arranged embedded bolts are detachably and fixedly connected to the first support frame, and the first support frame is clamped on a steel bar net of the raft foundation; a second support frame is detachably and fixedly connected between the middle parts of the embedded bolts; a third support frame is supported between the bottom surface of the foundation pit and the embedded bolt; the identification point on the embedded bolt is moved to a set position by adjusting the first support frame, the second support frame and the third support frame, and the third support frame is fixedly connected to the waterproof protective layer on the bottom surface of the foundation pit; fixedly connecting the embedded bolt with the reinforcing mesh through a connecting piece, and fixedly connecting the embedded bolt to a third support frame; disassembling the first support frame and the second support frame from the embedded bolts, and pouring a raft foundation in the foundation pit; therefore, the embedded bolt is guaranteed not to deform, shift and sink under the load action in the whole construction process.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method for embedding foundation bolts of a raft foundation of a deep foundation pit of a high-rise steel structure.
Background
In the construction of a raft foundation of a high-rise steel structure building, foundation bolt pre-embedding is a key process of raft foundation construction, and the pre-embedding precision directly influences the installation deviation of a first section of steel column; the traditional method adopts a positioning template or a steel-wood mixed fixing frame to fix the embedded bolts, and because the height of the raft foundation is generally more than 1.2m, the lower ends of the embedded bolts are suspended, the embedded bolts are difficult to ensure not to shift when construction procedures such as steel bar binding, welding, formwork erecting, concrete pouring and the like are carried out.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a high-rise steel structure deep foundation pit raft foundation bolt pre-embedding construction method, aiming at ensuring that the pre-embedded bolt does not deform, shift or sink under the load action in the whole construction process.
A construction method for embedding foundation bolts of a raft foundation of a deep foundation pit of a high-rise steel structure comprises the following steps:
step 1: the vertically arranged embedded bolts are detachably and fixedly connected to the first support frames, the first support frames are clamped on a steel bar net of the raft foundation, and meanwhile the middle parts and the lower parts of the embedded bolts are located in the steel bar net;
step 2: a second support frame is detachably and fixedly connected between the middle parts of the embedded bolts;
and step 3: a third support frame is supported between the bottom surface of the foundation pit and the embedded bolt;
and 4, step 4: measuring coordinates of the identification points on the embedded bolts in a coordinate system through a measuring instrument, moving the identification points on the embedded bolts to a set position by adjusting the first support frame, the second support frame and the third support frame, and fixedly connecting the third support frame to a waterproof protective layer on the bottom surface of the foundation pit;
and 5: fixedly connecting the embedded bolt with the reinforcing mesh through a connecting piece, and fixedly connecting the embedded bolt to the third support frame;
step 6: and disassembling the first support frame and the second support frame from the embedded bolts, and pouring a raft foundation in the foundation pit.
For convenient dismantlement and the pre-buried bolt of adjustment, further: the first support frame comprises a transverse frame plate, a longitudinal frame plate and a positioning support bolt, wherein a first strip-shaped through groove extending from the left end to the right end of the transverse frame plate is formed in the transverse frame plate, second strip-shaped through grooves are formed in the end parts of the two ends of the longitudinal frame plate along the length direction of the longitudinal frame plate, a cross buckle for positioning and locking the first strip-shaped through groove and the second strip-shaped through groove is arranged between the first strip-shaped through groove and the second strip-shaped through groove, and the end part of the transverse frame plate is lapped on the end part of the longitudinal frame plate and forms a cross structure through the cross buckle; the upper end of the embedded bolt penetrates through the end of the first strip-shaped groove and is fixedly connected with the transverse frame plate in a detachable mode, the upper end of the positioning support bolt penetrates through the end of the second strip-shaped groove and is fixedly connected with the longitudinal frame plate in a detachable mode, the lower end of the positioning support bolt is fixedly connected with an inverted U-shaped positioning clamping groove, and the positioning clamping groove is clamped on the steel bars of the steel bar mesh. The upper ends of the embedded bolts are fixedly connected to the transverse frame plate, the relative positions of the embedded bolts are adjusted according to design requirements, the transverse frame plate is kept to be fixed, the longitudinal frame plate or the positioning support bolt is adjusted, the positioning support bolt is supported between the longitudinal frame plate and the reinforcing mesh, and finally the upper portions of the embedded bolts are positioned and fixedly connected to the reinforcing mesh through the first support frame.
For the convenience fix and dismantle the second support frame on buried bolt in advance, further: the second support frame comprises fixed plates fixedly connected in a crossed mode, the fixed plates are located between the embedded bolts, the ends of the fixed plates correspond to the embedded bolts one to one and are close to the middle portions of the embedded bolts, clamping plates are fixedly connected to the ends of the fixed plates in a detachable mode, and the embedded bolts are clamped between the ends of the fixed plates and the clamping plates. The fixing plate is manufactured to be adaptive according to the relative position between the embedded bolts, the clamping plate and the fixing plate are fixedly connected with each other after clamping the middle parts of the embedded bolts, so that the relative position between the middle parts of the embedded bolts is not deviated, and the embedded bolts are enabled to form an integral structure with stable structure under the combined action of the first support frame and the second support frame.
In order to die the pre-buried bolt card, further: two opposite U-shaped clamping grooves are respectively arranged on the end head of the fixing plate and the corresponding clamping plate, and the U-shaped clamping grooves are respectively clamped on two sides of the embedded bolt.
For the convenience supports the third support frame between buried bolt in advance and foundation ditch bottom surface, further: the third support frame comprises support legs, support rods and support rods, the support legs are arranged at positions corresponding to the embedded bolts, the lower ends of the support legs are fixedly connected with the waterproof protective layer, two ends of each support rod are respectively and fixedly connected to the upper ends of the two support legs, and two ends of each support rod are respectively and fixedly connected with the middle parts of the two support rods; the lower end of the embedded bolt is abutted against the end part of the support rod and is fixedly connected with the support rod.
For the support height of convenient adjustment support frame to buried bolt in advance, further: the end part of the support rod is bent downwards to form a first bent part, a vertical strip-shaped through hole is formed in the position, corresponding to the first bent part, of the supporting leg, and a positioning bolt penetrates through the first bent part and the strip-shaped through hole in sequence and then fixedly connects the support rod to the supporting leg. The height of the support rod can be adjusted through the positioning bolt and the strip-shaped through hole, so that the height of the embedded bolt is adapted.
For the lower part and the die-pin fixed connection of convenient pre-buried bolt, further: and the lower part of the embedded bolt is transversely bent to form a second bent part, and the second bent part is abutted against and fixedly connected with the support rod.
In order to make the second kink carry out the welding after fixing a position on the die-pin, further: a limiting assembly is detachably and fixedly connected between the second bending part and the support rod and comprises a U-shaped clamping piece and a connecting clamping plate, an inverted U-shaped limiting clamping groove is formed in the position, corresponding to the second bending part, of the U-shaped clamping piece, the limiting clamping groove is clamped on the second bending part, the connecting clamping plate stretches across the lower portion of the support rod, and two ends of the connecting clamping plate are detachably and fixedly connected with the U-shaped clamping piece; after second kink and die-pin fixed connection, will spacing subassembly is demolishd the back turnover and is used.
Further: the connecting piece is the reinforcing bar, reinforcing bar mutual fixed connection constitutes frame construction, frame construction is kept flat the reinforcing bar is netted and fixed connection with it, the middle part fixed connection of pre-buried bolt is in the contained angle department of cell among the frame construction. The frame construction is the well style of calligraphy structure, embedded bolt be located in the inner circle of well style of calligraphy structure and with be located the contained angle department of well style of calligraphy structure side, embedded bolt with the equal fixed connection of the reinforcement reinforcing bar of contained angle both sides.
Further: and a cushion layer and a waterproof layer are sequentially arranged on the bottom surface of the foundation pit from bottom to top, a waterproof protective layer is arranged on the waterproof layer corresponding to the position of the third support frame, and the third support frame is fixedly connected to the waterproof protective layer.
The invention has the beneficial effects that: 1. the first support frame, the second support frame and the limiting assembly are detachable connecting pieces, operation is convenient, quick positioning of the embedded bolts is facilitated, and work efficiency is improved.
2. After the first support frame, the second support frame, the third support frame and the limiting assembly are assembled with the embedded bolts and the reinforcing mesh, the relative positions of the embedded bolts are fixed, and the positioning accuracy of the embedded bolts is improved.
3. The general worker can be arranged to carry out rough assembly of each component, the core technician then carries out checking and temporary fixing, after the temporary fixing, the measuring personnel can transfer to carry out positioning measurement on the bolt at the next position, and then the welder is arranged to carry out centralized welding and permanent fixing; can carry out the flowing water construction, further promote the work efficiency.
4. Most parts in the assembly are standard parts in the same project, and can be recycled in the same project, so that the cost is reduced.
5. The embedded bolt is positioned by the first support frame, the second support frame, the third support frame and the limiting assembly and is welded on the reinforcing steel bar net through the reinforcing steel bar, so that the embedded bolt is not deformed, shifted and sunk under the load action in the whole construction process.
Drawings
Fig. 1 is a schematic view showing the installation relationship of the embedded bolt, the first support frame and the reinforcing mesh in the present invention;
FIG. 2 is a schematic structural diagram of a first support frame according to the present invention;
fig. 3 is a schematic view showing the installation relationship among the embedded bolts, the first support frame, the second support frame and the reinforcing mesh;
FIG. 4 is a schematic structural view of a second support frame according to the present invention;
fig. 5 is a schematic view showing the installation relationship of the embedded bolt, the first support frame, the second support frame, the third support frame and the reinforcing mesh in the present invention;
FIG. 6 is a schematic view of the mounting relationship between the third support frame and the position-limiting assembly of the present invention;
FIG. 7 is a schematic view of an installation relationship of a third support frame, a limiting assembly and a pre-buried bolt in the invention;
fig. 8 is a schematic view of the final structure of the present invention in which the embedded bolts are fixed in the raft foundation pit.
In the figure, 1, a first support frame; 11. a longitudinal frame plate; 111. a second strip-shaped through groove; 12. a transverse frame plate; 121. a first bar-shaped through groove; 13. a cross buckle; 14. positioning the support bolt; 141. positioning the clamping groove; 2. a second support frame; 21. a fixing plate; 22. clamping a plate; 23. a U-shaped clamping groove; 3. a third support frame; 31. a support leg; 311. a fixing leg; 312. a strip-shaped through hole; 32. a support rod; 321. a first bent portion; 33. a stay bar; 34. an expansion bolt; 4. embedding bolts; 41. a second bent portion; 5. a reinforcing mesh; 6. a waterproof protective layer; 7. a connecting member; 8. a limiting component; 81. a U-shaped clamping piece; 811. a limiting clamping groove; 82. the card board is connected.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings. Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention. The terms of orientation such as left, center, right, up, down, etc. in the examples of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.
A construction method for embedding foundation bolts of a raft foundation of a deep foundation pit of a high-rise steel structure comprises the following steps:
step 1: as shown in fig. 1 and fig. 2, vertically arranged embedded bolts 4 are detachably and fixedly connected to a first support frame 1, the first support frame 1 is clamped on a reinforcing mesh 5 of a raft foundation, and the middle and lower parts of the embedded bolts 4 are located in the reinforcing mesh 5; specifically, the first support frame 1 comprises a transverse frame plate 12, a longitudinal frame plate 11 and a positioning support bolt 14, wherein a first strip-shaped through groove 121 extending from the left end to the right end of the transverse frame plate 12 is formed in the transverse frame plate 12, second strip-shaped through grooves 111 are formed in the end portions of the two ends of the longitudinal frame plate 11 along the length direction of the longitudinal frame plate, a cross buckle 13 for positioning and locking the first strip-shaped through groove 121 and the second strip-shaped through groove 111 is arranged between the first strip-shaped through groove 121 and the second strip-shaped through groove 111, and the end portion of the transverse frame plate 12 is lapped on the end portion of the longitudinal frame plate 11 and forms a cross structure through the cross buckle 13; the upper end of the embedded bolt 4 penetrates through the end of the first strip-shaped groove 121 and is fixedly connected with the transverse frame plate 12 in a detachable mode, the upper end of the positioning support bolt 14 penetrates through the end of the second strip-shaped groove 111 and is fixedly connected with the longitudinal frame plate 11 in a detachable mode, the lower end of the positioning support bolt 14 is fixedly connected with an inverted-U-shaped positioning clamping groove 141, and the positioning clamping groove 141 is clamped on the steel bars of the steel bar mesh 5. The upper ends of the embedded bolts 4 are fixedly connected to the transverse frame plate 12, the relative positions of the embedded bolts 4 are adjusted according to the design requirements, the transverse frame plate 12 is kept fixed, and the longitudinal frame plate 11 or the positioning support bolts 14 are adjusted, so that the positioning support bolts 14 are supported between the longitudinal frame plate 11 and the steel bar net 5, and finally, the upper parts of the embedded bolts 4 are positioned and fixedly connected to the steel bar net 5 through the first support frame 1.
Step 2: referring to fig. 3 and 4, the second support frame 2 is detachably and fixedly connected between the middle parts of the embedded bolts 4; specifically, the second support frame 2 comprises fixing plates 21 fixedly connected in a crossed manner, the fixing plates 21 are located between the embedded bolts 4, the ends of the fixing plates 21 correspond to the embedded bolts 4 one to one and are close to the middle portions of the embedded bolts 4, clamping plates 22 are fixedly connected to the ends of the fixing plates 21 in a detachable manner, and the embedded bolts 4 are clamped between the ends of the fixing plates 21 and the clamping plates 22. According to the relative position preparation adaptive fixed plate 21 between the buried bolt 4, cardboard 22 and fixed plate 21 centre gripping buried bolt 4's middle part back mutual fixed connection to guarantee that the relative position between buried bolt 4 middle part does not take place the skew, make buried bolt 4 form a stable in structure's overall structure under the combined action of first support frame 1 and second support frame 2. Two opposite U-shaped clamping grooves 23 are respectively arranged on the end of the fixing plate 21 and the corresponding clamping plate 22, and the U-shaped clamping grooves 23 are respectively clamped on two sides of the embedded bolt 4.
And step 3: as shown in fig. 5, 6 and 7, a third support frame 3 is supported between the bottom surface of the foundation pit and the embedded bolt 4; specifically, the third support frame 3 comprises support legs 31, support rods 32 and support rods 33, the support legs 31 are arranged at positions corresponding to the embedded bolts 4, two ends of each support rod 32 are fixedly connected to the upper ends of the two support legs 31, and two ends of each support rod 33 are fixedly connected to the middle parts of the two support rods 32; the lower end of the embedded bolt 4 is abutted against the end part of the support rod 32 and is fixedly connected with the support rod 32. The end of the support rod 32 is bent downwards to form a first bent portion 321, a vertical strip-shaped through hole 312 is formed in the position, corresponding to the first bent portion 321, of the supporting leg 31, and a positioning bolt penetrates through the first bent portion 321 and the strip-shaped through hole 312 in sequence to fixedly connect the support rod 32 to the supporting leg 31. The height of the support rod 32 can be adjusted through the positioning bolt and the strip-shaped through hole 312, so that the height of the embedded bolt 4 is adapted. The lower part of the embedded bolt 4 is transversely bent to form a second bent part 41, and the second bent part 41 abuts against and is fixedly connected with the support rod 32. A limiting component 8 is detachably and fixedly connected between the second bent portion 41 and the supporting rod 32, and as shown in fig. 7, the limiting component 8 includes a U-shaped clamping piece 81 and a connecting clamping plate 82, an inverted U-shaped limiting clamping groove 811 is formed in a position of the U-shaped clamping piece 81 corresponding to the second bent portion 41, the limiting clamping groove 811 is clamped on the second bent portion 41, the connecting clamping plate 82 spans below the supporting rod 32, and two ends of the connecting clamping plate 82 are detachably and fixedly connected with the U-shaped clamping piece 81; after the second bending part 41 and the support rod 32 are fixedly connected, the limiting component 8 is disassembled and then is used in a circulating way.
And 4, step 4: measuring coordinates of the identification points on the embedded bolts 4 in a coordinate system through a measuring instrument, and moving the identification points on the embedded bolts to a set position by adjusting the first support frame 1, the second support frame 2 and the third support frame 3; the measuring instrument can be a total station, the identification point on the embedded bolt 4 can be the central point of the upper end surface of the embedded bolt 4, and also can be a specific position on the embedded bolt 4, the third support frame 3 is fixedly connected on the waterproof protective layer 6 on the bottom surface of the foundation pit, the lower part of the third support frame 3 is fixedly provided with a fixing foot 311, the fixing foot 311 is fixedly connected on the waterproof protective layer 6 through an expansion bolt, a plain cement cushion layer and a waterproof layer are sequentially arranged on the bottom surface of the foundation pit from bottom to top, the waterproof protective layer 6 poured by concrete is arranged on the waterproof layer corresponding to the position of the third support frame 3, and the third support frame 3 is fixedly connected on the waterproof protective layer 6.
And 5: as shown in fig. 8, the embedded bolts 4 and the reinforcing mesh 5 are fixedly connected by the connectors 7, and the embedded bolts 4 are fixedly connected to the third supporting frame 3; the connecting pieces 7 are specifically reinforcing steel bars, the reinforcing steel bars are fixedly connected with one another to form a frame structure, the frame structure is flatly placed on the reinforcing mesh 5 and fixedly connected with the reinforcing mesh, and the middle of the embedded bolt 4 is fixedly connected to the included angle of the unit cells in the frame structure. Specifically, the frame structure is the # -shaped structure, embedded bolt 4 is located in the inner circle of # -shaped structure and with be located the contained angle department of # -shaped structure side, embedded bolt 4 with the equal fixed connection of the reinforcement reinforcing bar of contained angle both sides.
Step 6: as shown in fig. 8, the first support frame 1 and the second support frame 2 are detached from the embedded bolts 4, a raft foundation is poured in the foundation pit, the raft foundation is poured section by using automobile pumps for layering when concrete is poured on the raft foundation, and the vibrating rods are strictly prohibited from contacting the embedded bolts 4 during vibrating.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A high-rise steel structure deep foundation pit raft foundation anchor bolt pre-embedding construction method is characterized by comprising the following steps:
step 1: the vertically arranged embedded bolts are detachably and fixedly connected to the first support frames, the first support frames are clamped on a steel bar net of the raft foundation, and meanwhile the middle parts and the lower parts of the embedded bolts are located in the steel bar net;
step 2: a second support frame is detachably and fixedly connected between the middle parts of the embedded bolts;
and step 3: a third support frame is supported between the bottom surface of the foundation pit and the embedded bolt;
and 4, step 4: measuring the coordinates of the identification points on the embedded bolts in a coordinate system through a measuring instrument, moving the identification points on the embedded bolts to a set position by adjusting the first support frame, the second support frame and the third support frame, and fixedly connecting the third support frame to the waterproof protective layer on the bottom surface of the foundation pit;
and 5: fixedly connecting the embedded bolt with the reinforcing mesh through a connecting piece, and fixedly connecting the embedded bolt to the third support frame;
step 6: and disassembling the first support frame and the second support frame from the embedded bolts, and pouring a raft foundation in the foundation pit.
2. The high-rise steel structure deep foundation pit raft foundation anchor bolt pre-embedding construction method according to claim 1, characterized in that: the first support frame comprises a transverse frame plate, a longitudinal frame plate and a positioning support bolt, wherein a first strip-shaped through groove extending from the left end to the right end of the transverse frame plate is formed in the transverse frame plate, second strip-shaped through grooves are formed in the end parts of the two ends of the longitudinal frame plate along the length direction of the longitudinal frame plate, a cross buckle for positioning and locking the first strip-shaped through groove and the second strip-shaped through groove is arranged between the first strip-shaped through groove and the second strip-shaped through groove, and the end part of the transverse frame plate is lapped on the end part of the longitudinal frame plate and forms a cross structure through the cross buckle; the upper end of the embedded bolt penetrates through the end of the first strip-shaped groove and is fixedly connected with the transverse frame plate in a detachable mode, the upper end of the positioning support bolt penetrates through the end of the second strip-shaped groove and is fixedly connected with the longitudinal frame plate in a detachable mode, the lower end of the positioning support bolt is fixedly connected with an inverted U-shaped positioning clamping groove, and the positioning clamping groove is clamped on the steel bars of the steel bar mesh.
3. The high-rise steel structure deep foundation pit raft foundation anchor bolt pre-embedding construction method according to claim 1, characterized in that: the second support frame comprises fixed plates fixedly connected in a crossed mode, the fixed plates are located between the embedded bolts, the ends of the fixed plates correspond to the embedded bolts one to one and are close to the middle portions of the embedded bolts, clamping plates are fixedly connected to the ends of the fixed plates in a detachable mode, and the embedded bolts are clamped between the ends of the fixed plates and the clamping plates.
4. The high-rise steel structure deep foundation pit raft foundation anchor bolt pre-burying construction method according to claim 3, characterized in that: two opposite U-shaped clamping grooves are respectively arranged on the end head of the fixing plate and the corresponding clamping plate, and the U-shaped clamping grooves are respectively clamped on two sides of the embedded bolt.
5. The high-rise steel structure deep foundation pit raft foundation anchor bolt pre-embedding construction method according to claim 1, characterized in that: the third support frame comprises support legs, support rods and support rods, the support legs are arranged at positions corresponding to the embedded bolts, the lower ends of the support legs are fixedly connected with the waterproof protective layer, two ends of each support rod are fixedly connected to the upper ends of the two support legs respectively, and two ends of each support rod are fixedly connected with the middle parts of the two support rods respectively; the lower end of the embedded bolt is abutted against the end part of the support rod and is fixedly connected with the support rod.
6. The high-rise steel structure deep foundation pit raft foundation anchor bolt pre-embedding construction method according to claim 5, characterized in that: the end part of the support rod is bent downwards to form a first bending part, a vertical strip-shaped through hole is formed in the position, corresponding to the first bending part, of the support leg, and a positioning bolt penetrates through the first bending part and the strip-shaped through hole in sequence and then fixedly connects the support rod to the support leg.
7. The high-rise steel structure deep foundation pit raft foundation anchor bolt pre-embedding construction method according to claim 1, characterized in that: and the lower part of the embedded bolt is transversely bent to form a second bent part, and the second bent part is abutted against and fixedly connected with the support rod.
8. The high-rise steel structure deep foundation pit raft foundation anchor bolt pre-embedding construction method according to claim 7, characterized in that: a limiting assembly is detachably and fixedly connected between the second bending part and the support rod and comprises a U-shaped clamping piece and a connecting clamping plate, an inverted U-shaped limiting clamping groove is formed in the position, corresponding to the second bending part, of the U-shaped clamping piece, the limiting clamping groove is clamped on the second bending part, the connecting clamping plate stretches across the lower portion of the support rod, and two ends of the connecting clamping plate are detachably and fixedly connected with the U-shaped clamping piece; after second kink and die-pin fixed connection, will spacing subassembly is demolishd the back turnover and is used.
9. The high-rise steel structure deep foundation pit raft foundation anchor bolt pre-embedding construction method according to claim 1, characterized in that: the connecting piece is the reinforcing bar, reinforcing bar mutual fixed connection constitutes frame construction, frame construction is kept flat the reinforcing bar is netted and fixed connection with it, the middle part fixed connection of pre-buried bolt is in the contained angle department of cell among the frame construction.
10. The high-rise steel structure deep foundation pit raft foundation anchor bolt pre-burying construction method according to claim 1, characterized in that: and a cushion layer and a waterproof layer are sequentially arranged on the bottom surface of the foundation pit from bottom to top, a waterproof protective layer is arranged on the waterproof layer corresponding to the position of the third support frame, and the third support frame is fixedly connected to the waterproof protective layer.
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| CN202210477876.XA CN114575372B (en) | 2022-05-05 | 2022-05-05 | Pre-burying construction method for foundation bolts of raft foundation of deep foundation pit with high-rise steel structure |
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| CN202210477876.XA CN114575372B (en) | 2022-05-05 | 2022-05-05 | Pre-burying construction method for foundation bolts of raft foundation of deep foundation pit with high-rise steel structure |
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| CN114033194A (en) * | 2021-12-20 | 2022-02-11 | 启东市建筑机械厂有限公司 | Foundation bolt pre-embedding positioning device and construction method thereof |
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| CN114575372B (en) | 2022-08-12 |
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Denomination of invention: A construction method for pre embedding anchor bolts of raft foundation in deep foundation pits of high-rise steel structures Effective date of registration: 20231214 Granted publication date: 20220812 Pledgee: Limited by Share Ltd. Xinxiang branch Pledgor: HENAN TIANFENG STEEL STRUCTURE CONSTRUCTION CO.,LTD. Registration number: Y2023980071190 |