CN212248394U - Anti fixed knot that floats of bottom plate of tunnel foundation ditch constructs - Google Patents
Anti fixed knot that floats of bottom plate of tunnel foundation ditch constructs Download PDFInfo
- Publication number
- CN212248394U CN212248394U CN202022032942.1U CN202022032942U CN212248394U CN 212248394 U CN212248394 U CN 212248394U CN 202022032942 U CN202022032942 U CN 202022032942U CN 212248394 U CN212248394 U CN 212248394U
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- bottom plate
- bolt
- fender pile
- foundation ditch
- reinforcing bar
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- 230000002787 reinforcement Effects 0.000 claims abstract description 28
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- 239000010959 steel Substances 0.000 claims description 25
- 238000007667 floating Methods 0.000 claims description 16
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 13
- 238000003466 welding Methods 0.000 abstract description 6
- 230000006378 damage Effects 0.000 abstract description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 12
- 238000006073 displacement reaction Methods 0.000 description 4
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- 238000005859 coupling reaction Methods 0.000 description 3
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- 239000000126 substance Substances 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a tunnel construction field's a fixed knot that resists to float of bottom plate of tunnel foundation ditch constructs, include along the direction of height of foundation ditch around the a plurality of fender pile of foundation ditch inner wall fixation in the foundation ditch, the fender pile encloses the region of establishing the ring dress, every the fender pile orientation is met the hole side and is fixed with the accepting bolt, and it has a connecting reinforcement to be located common welding on all accepting bolts of homonymy to make a plurality of connecting reinforcement enclose and establish into the ring shape, be provided with staggered arrangement's a plurality of in the foundation ditch and strut the reinforcing bar, the both ends of bracing reinforcement respectively with the connecting reinforcement mutual welding that closes on, pour concrete on strutting the reinforcing bar at last and form the bottom plate and with every fender pile and bottom plate reciprocal anchorage. This scheme need not to cause the destruction to the concrete of a fender pile, only needs the carrier through accepting the bolt replace with the inside reinforcing bar mutual welded numerous and diverse operation of a fender pile, has reduced the engineering time greatly, has still protected a fender pile original structure moreover for in the earthquake, the intensity influence to a fender pile is less.
Description
Technical Field
The application relates to the field of tunnel construction, in particular to a bottom plate anti-floating fixing structure of a tunnel foundation pit.
Background
During the foundation ditch construction, in order to prevent the bottom of the foundation ditch from surging suddenly, the bottom of the foundation ditch needs to be reinforced or plugged, and anti-floating measures are taken. In the existing engineering, most foundation pit supporting piles are adopted and also used as anti-floating engineering piles, but the foundation pit supporting piles have some difficulties:
1. the supporting piles not only meet the requirements of foundation pit supporting (anti-overturning, anti-bulging, integral stability, bending resistance and anti-shearing bearing capacity), but also meet the requirements of how to meet the anti-floating bearing capacity, including the depth of insertion into the pit bottom and reinforcing bars. 2. How the support piles and the bottom plate of the underground structure are connected into a whole, so that the support piles, the underground structure and the pile foundations thereof work together under the action of underground water buoyancy, and mutual displacement deformation is not generated. 3. When the requirement on the earthquake resistance of the underground structure is higher, the underground structure bottom plate is separated from the support piles by adopting any structural structure, so that the horizontal direction can deform and displace under the action of earthquake force, and the support piles still play a role in resisting floating and bearing.
Because the foundation pit supporting piles are constructed in advance, when the foundation pit bottom plate structure is constructed, the supporting piles and the bottom plate of the underground structure are connected into a whole so as to participate in anti-floating work. The common construction method at present comprises the following steps: as shown in the figure, the worker firstly needs to remove the concrete on the base of each supporting pile facing the side face of the pit, so that a pit is formed at the bottom of the supporting pile, the reinforcing steel bars in the supporting pile are exposed outside, then the worker starts to lay the supporting reinforcing steel bars of the base plate, two ends of the supporting reinforcing steel bars are respectively welded with the reinforcing steel bars of the pits of the corresponding supporting pile, a supporting net with the supporting reinforcing steel bars arranged in a staggered mode is formed at the bottom of the supporting pile, the supporting reinforcing steel bars and the reinforcing steel bars in the supporting pile steel are connected into a whole, and finally the base plate and the supporting pile form a whole through pouring of the concrete.
However, the construction method has the following defects: chiseling the concrete of each support pile base reduces the support and load bearing capacity of the support pile base.
SUMMERY OF THE UTILITY MODEL
In order to reduce the destruction to the support stake, this application provides a fixed knot that anti floats of bottom plate of tunnel foundation ditch constructs.
The application provides a pair of anti fixed knot that floats of bottom plate of tunnel foundation ditch constructs adopts following technical scheme:
the utility model provides an anti fixed knot that floats of bottom plate of tunnel foundation ditch constructs, includes that the direction of height along the foundation ditch centers on the foundation ditch inner wall and fixes a plurality of fender pile in the foundation ditch, the fender pile encloses the region of establishing the ring-type dress, every the fender pile orientation is met the side and is fixed with the receiving bolt, and it has a connecting reinforcement to be located common welding on all receiving bolts of homonymy to make a plurality of connecting reinforcement enclose and establish the ring-type, be provided with staggered arrangement's a plurality of in the foundation ditch and strut the reinforcing bar, the both ends of supporting reinforcement respectively with the connecting reinforcement who closes on mutual welding, pour concrete formation bottom plate and with every fender pile and bottom plate reciprocal anchorage on strutting the reinforcing bar at last.
Through adopting above-mentioned technical scheme, the staff is when fixing the bottom plate, only need to accept bolted connection and meet one side of pithead face at every fender pile orientation, then take the splice bar and put on the splice bar of homonymy again, accept the bolt and provide the support carrier for the splice bar, not only be convenient for fix a position the splice bar, but also provided splice bar and accept bolt welded efficiency, at last will strut the crisscross section of reinforcing bar and lay in the region that a plurality of splice bar encloses again, the setting up of bottom plate reinforcing bar net has been realized fixedly. Compared with the prior art, this scheme need not to cause the destruction to the concrete of a fender pile, only needs the carrier through accepting the bolt replace with the inside reinforcing bar mutual welded numerous and diverse operation of a fender pile, has reduced the engineering time greatly, has still protected the original structure of a fender pile moreover for in the earthquake, the intensity of a fender pile can not receive the influence. And when the requirement of antidetonation is higher, in order to satisfy the displacement that can warp in the horizontal direction under the earthquake power effect, fender pile and bottom plate connection structure must break away, because every fender pile only through a accepting bolt and the connecting reinforcement reciprocal anchorage of bottom plate, compare prior art staff and cut off accepting the bolt more easily for the connection structure separation of bottom plate and fender pile helps reaching the requirement of antidetonation.
Preferably, the receiving bolt is an expansion bolt.
By adopting the technical scheme, according to the construction requirement of connecting the existing rigid material and concrete, a worker can adopt a connection mode of an embedded part or a rear chemical anchor bolt or an expansion bolt. The casting mode of the support pile cannot adopt a connection mode of firstly manufacturing embedded parts; the rear chemical anchor bolt has high connection strength, but the operation is more complicated, and the construction period is longer; therefore, the expansion bolt is adopted, the connection mode is mature, the waste of redundant time is not needed, the economic benefit is high, and the operation is convenient and fast.
Preferably, a plurality of supporting steel bars are fixed on the connecting steel bars of the adjacent supporting piles.
Through adopting above-mentioned technical scheme, the staff can strut the quantity of reinforcing bar according to the demand adjustment to reach the different intensity demand of bottom plate, weld with the inside reinforcing bar of a fender pile among the prior art and make the intensity of bottom plate directly corresponding with the inside reinforcing bar quantity of a fender pile, the limitation is big.
Preferably, a limiting component for limiting the connection steel bar to be separated from the receiving bolt is further arranged at the end part of each receiving bolt.
Through adopting above-mentioned technical scheme, spacing subassembly sets up the tip at accepting the bolt for when the initial stage will connect reinforcing bar and every accepting the bolt welding, restricted connecting bar and the breaking away from of accepting the bolt, improved the stability that connecting bar and every accepted the bolt and set up, thereby the staff of being convenient for carries out welded fastening to connecting bar, has improved the efficiency of construction.
Preferably, the limiting assembly comprises a sleeve sleeved at the end of the bearing bolt and a limiting piece fixed at one end of the sleeve, and the size of the limiting piece is larger than that of the sleeve.
By adopting the technical scheme, after the working personnel fix the bearing bolt, the sleeve is sleeved at the end part of the bearing bolt, and the limiting piece is blocked at the end part of the bearing bolt through the friction force between the sleeve and the bearing bolt, so that if the connecting bolt swings, the limiting piece limits the swing range of the connecting bolt, and the connecting steel bar is not easy to be separated from the bearing bolt. And the limiting assembly is simple in structure, and the mounting efficiency of the limiting assembly is improved.
Preferably, an internal thread matched with the screw thread of the receiving bolt is formed in the sleeve.
Through adopting above-mentioned technical scheme, sleeve and accepting bolt threaded connection have improved sleeve and the steadiness of accepting bolt connection, but also the operation of being convenient for.
Preferably, the length of each receiving bolt protruding from the outer circumferential surface of the support pile is limited to 5cm to 8 cm.
Through adopting above-mentioned technical scheme, after connecting reinforcement and accepting bolt welded each other, connecting reinforcement need leave certain clearance with every pillar stake to when satisfying the mutual overlap joint of strutting reinforcing bar and connecting reinforcement, the tip of strutting the reinforcing bar leaves the surplus with the contact point of connecting reinforcement, makes strutting the reinforcing bar and takes with connecting reinforcement more stable, has also improved the operating efficiency that the staff laid and strut the reinforcing bar.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the method has the advantages that the damage to the support pile is reduced, the existing construction step of taking out concrete from the support pile is replaced by the arrangement of the bearing bolt, and the strength damage to the support pile is greatly reduced;
2. the construction period is shortened, and because the wall removing treatment of the support piles is not needed, the wall removing construction amount is greatly reduced, and the construction efficiency is improved;
3. the strength of the whole base plate is increased, and the working personnel can adjust the number of the supporting steel bars according to the requirements by connecting the supporting steel bars, so that the aim of controlling the strength of the base plate is fulfilled.
Drawings
FIG. 1 is a schematic view of the overall structure of a bottom anti-floating fixing structure in the prior art;
FIG. 2 is a schematic view of a connection structure of supporting steel bars and supporting piles in a bottom plate in the background art;
FIG. 3 is a schematic view of the anti-floating fixing structure of the bottom plate in embodiment 1;
FIG. 4 is a schematic view showing a connection structure of a support pile and a support reinforcing bar inside a base plate in example 1;
fig. 5 is a schematic view of a connection structure of a receiving bolt and a support pile according to embodiment 2.
Description of reference numerals: 1. supporting piles; 11. a connecting member; 12. a pit; 2. receiving the bolt; 3. connecting reinforcing steel bars; 4. supporting reinforcing steel bars; 5. a limiting component; 51. a sleeve; 52. a limiting sheet.
Detailed Description
The present application is described in further detail below with reference to the accompanying drawings.
Example 1: the embodiment of the application discloses anti fixed knot that floats of bottom plate of tunnel foundation ditch constructs, as shown in fig. 3, set up in the foundation ditch, this embodiment uses the rectangle foundation ditch as an example, and the direction of height along the foundation ditch in the foundation ditch immediately is equipped with a plurality of root fender pile 1, and the bottom and the foundation ditch bottom reciprocal anchorage of fender pile 1 to prop up fender pile 1 along foundation ditch inner wall evenly distributed, and enclose out the annular region of rectangle, every row of fender pile 1's the same and one-to-one quantity.
As shown in fig. 3 and 4, a fixing hole is formed in the circumferential surface of each pillar pile at the base, and the fixing hole faces to the side facing the pit surface, a receiving bolt 2 is fixed in each fixing hole, the receiving bolts are expansion bolts, the receiving bolts 2 in the same row are parallel to each other, and the axes of the receiving bolts 2 in the same row are all located on the same horizontal plane. And a connecting steel bar 3 is also erected on the bearing bolts 2 in the same row, and the connecting parts of the connecting steel bar 3 and each bearing bolt 2 are welded with each other.
Be provided with a plurality of between two relative connecting reinforcement 3 and strut reinforcing bar 4, strut reinforcing bar 4 and connecting reinforcement 3 mutually perpendicular, strut the both ends of reinforcing bar 4 and take respectively and put on corresponding connecting reinforcement 3 and with the contact position mutual welding of connecting reinforcement 3, strut reinforcing bar 4 and evenly lay along the length direction of taking two connecting reinforcement 3 put moreover. After the supporting reinforcing steel bars 4 in one direction are adjusted, the supporting reinforcing steel bars 4 on the other two sides are adjusted and connected in the same mode by workers, so that the supporting reinforcing steel bars 4 in the two directions are mutually abutted up and down and are staggered by 90 degrees. The staff can strut reinforcing bar 4 at the quantity of arranging of coupling bar 3 according to the intensity demand adjustment of bottom plate for strut that reinforcing bar 4 can both be even lay in the region that four coupling bar 3 enclose and establish, compare with prior art, strut reinforcing bar 4 only can with a fender pile 1 inside reinforcing bar interconnect, make lack between the adjacent fender pile 1 and strut arranging of reinforcing bar 4, cause the bottom plate to strut reinforcing bar 4 and arrange differently, the atress is uneven. So in this application through accepting bolt 2 and connecting reinforcement 3's setting, not only solved and strutted 4 uneven distribution's of reinforcing bar problem, need not to carry out broken wall processing to fender pile 1 moreover, when the reduction is destroyed to fender pile 1, still improved the efficiency of construction. And finally, the working personnel realize the molding of the bottom plate through the pouring of the concrete, and finally realize the mutual fixation of the bottom plate and the support pile 1.
The length of each supporting bolt 2 protruding out of the supporting pile 1 is 5cm, when the connecting steel bars 3 are placed on the supporting bolts 2 in the same row, enough gaps can be reserved between the connecting steel bars and the supporting piles 1, when the end portions of the supporting steel bars 4 are placed on the connecting steel bars 3, allowance is reserved between the end portions of the supporting steel bars 4 and connection points of the connecting steel bars 3, the supporting steel bars 4 are not prone to being separated from the connecting steel bars 3, and meanwhile fault tolerance of the connecting steel bars 3 and the supporting steel bars 4 in fixing is improved.
And higher antidetonation demand can also be satisfied to the fixed decoupling zero strand of bottom plate anti floating in this embodiment, need overcome the effort of horizontal direction in the pit when the earthquake takes place, and fender pile 1 needs to produce the displacement deformation of horizontal direction, because the bottom plate is to the reciprocal anchorage of week side fender pile 1, can restrict the displacement of fender pile 1. In the prior art, the supporting steel bars 4 are welded with the steel bars inside each supporting pile 1, so that the connection part of the bottom plate and the supporting pile 1 is difficult to separate. In the embodiment, only one receiving bolt 2 of each support pile is fixed with the bottom plate, and workers can separate the bottom plate from the trunk of each support pile only by cutting off each receiving bolt 2, so that the loss can be reduced by abandoning the bottom plate when an earthquake occurs.
Example 2: the utility model provides a bottom plate anti-floating fixed knot of tunnel foundation ditch constructs, as shown in fig. 5, with embodiment 1's difference, the tip of every accepting bolt 2 is provided with a spacing subassembly 5, spacing subassembly 5 includes a sleeve 51, the inner wall diameter of sleeve 51 equals the diameter of accepting bolt 2, set up the internal thread with accepting bolt 2 screw-thread fit on the inner wall of sleeve 51, sleeve 51 deviates from the coaxial rigid coupling of open-ended terminal surface and has a circular shape spacing piece 52, the diameter of spacing piece 52 is greater than the diameter of sleeve 51 outer peripheral face. The staff will accept the bolt 2 fixed back, through sleeve 51 and the threaded connection who accepts bolt 2, thereby fix spacing subassembly 5 at every tip of accepting bolt 2, then the staff places connecting reinforcement 3 again on accepting bolt 2 with arranging, because spacing piece 52 is located the tip of accepting bolt 2, even connecting reinforcement 3 takes place to slide, be difficult for causing connecting reinforcement 3 and accepting bolt 2's mutual breaking away from, and then improved the stability that connecting reinforcement 3 placed, be convenient for the staff follow-up will connecting reinforcement 3 and accept bolt 2 mutual welded fastening.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. The utility model provides an anti fixed knot that floats of bottom plate of tunnel foundation ditch constructs, includes a plurality of fender pile (1) of fixing in the foundation ditch around the foundation ditch inner wall along the direction of height of foundation ditch, fender pile (1) encloses the region of establishing ring dress, its characterized in that: every fender pile (1) is faced the hole side and is fixed with accepting bolt (2), and it has connecting reinforcement (3) to weld jointly on all accepting bolt (2) that are located the homonymy to make a plurality of connecting reinforcement (3) enclose and establish into the ring-type, be provided with staggered arrangement's a plurality of in the foundation ditch and strut reinforcing bar (4), strut the both ends of reinforcing bar (4) and weld each other with connecting reinforcement (3) that close on respectively, pour the concrete on strutting reinforcing bar (4) at last and form the bottom plate and with every fender pile (1) and bottom plate reciprocal anchorage.
2. The anti-floating fixing structure for the bottom plate of the tunnel foundation pit as claimed in claim 1, wherein: the receiving bolt (2) is an expansion bolt.
3. The anti-floating fixing structure for the bottom plate of the tunnel foundation pit as claimed in claim 1, wherein: and a plurality of supporting steel bars (4) are fixed on the connecting steel bars (3) of the adjacent supporting piles (1).
4. The anti-floating fixing structure for the bottom plate of the tunnel foundation pit as claimed in claim 2, wherein: and a limiting component (5) for limiting the connection steel bar (3) to be separated from the bearing bolt (2) is further arranged at the end part of each bearing bolt (2).
5. The anti-floating fixing structure for the bottom plate of the tunnel foundation pit as claimed in claim 4, wherein: the limiting assembly (5) comprises a sleeve (51) sleeved at the end part of the bearing bolt (2) and a limiting sheet (52) fixed at one end of the sleeve (51), and the size of the limiting sheet (52) is larger than the cross-sectional size of the sleeve (51).
6. The anti-floating fixing structure for the bottom plate of the tunnel foundation pit as claimed in claim 5, wherein: and an internal thread matched with the screw thread of the bearing bolt (2) is arranged in the sleeve (51).
7. The anti-floating fixing structure for the bottom plate of the tunnel foundation pit as claimed in claim 1, wherein: the length of each receiving bolt (2) protruding out of the outer peripheral surface of the support pile (1) is limited to 5cm to 8 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022032942.1U CN212248394U (en) | 2020-09-16 | 2020-09-16 | Anti fixed knot that floats of bottom plate of tunnel foundation ditch constructs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022032942.1U CN212248394U (en) | 2020-09-16 | 2020-09-16 | Anti fixed knot that floats of bottom plate of tunnel foundation ditch constructs |
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| Publication Number | Publication Date |
|---|---|
| CN212248394U true CN212248394U (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022032942.1U Expired - Fee Related CN212248394U (en) | 2020-09-16 | 2020-09-16 | Anti fixed knot that floats of bottom plate of tunnel foundation ditch constructs |
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| CN (1) | CN212248394U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980076A (en) * | 2020-09-16 | 2020-11-24 | 北京市政建设集团有限责任公司 | Anti-floating fixing structure for tunnel foundation pit bottom plate and construction process |
-
2020
- 2020-09-16 CN CN202022032942.1U patent/CN212248394U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980076A (en) * | 2020-09-16 | 2020-11-24 | 北京市政建设集团有限责任公司 | Anti-floating fixing structure for tunnel foundation pit bottom plate and construction process |
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Granted publication date: 20201229 |