CN113510837B - Prefabricated cover beam deep-buried anchor fixing template and pouring method - Google Patents
Prefabricated cover beam deep-buried anchor fixing template and pouring method Download PDFInfo
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- CN113510837B CN113510837B CN202110619071.XA CN202110619071A CN113510837B CN 113510837 B CN113510837 B CN 113510837B CN 202110619071 A CN202110619071 A CN 202110619071A CN 113510837 B CN113510837 B CN 113510837B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/022—Means for inserting reinforcing members into the mould or for supporting them in the mould
- B28B23/024—Supporting means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/022—Means for inserting reinforcing members into the mould or for supporting them in the mould
- B28B23/024—Supporting means
- B28B23/026—Mould partitionning elements acting as supporting means in moulds, e.g. for elongated articles
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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Abstract
The invention provides a prefabricated cover beam deep-buried anchor fixing template and a pouring method, wherein the prefabricated cover beam deep-buried anchor fixing template comprises a prefabricated cover beam reinforcement cage and a pouring template frame for installing the prefabricated cover beam reinforcement cage, and the pouring template frame is provided with a plurality of deep-buried anchor matching holes; the method comprises the following steps: the positioning assembly is arranged on the pouring template frame and is matched and connected with the deep-buried anchor matching hole; the prestressed corrugated pipe is connected into the prefabricated cover beam reinforcement cage; a deeply buried anchor connected to the pre-stressed corrugated pipe; and the corresponding positions of the deep-buried anchor and the prestressed corrugated pipe are coaxially arranged through the positioning assembly. The invention solves the technical problem that the position of a deep-buried anchor on a prestressed corrugated pipe is difficult to fix, and the deep-buried anchor can keep the technical effect of coaxial arrangement with the corresponding prestressed corrugated pipe by additionally arranging a positioning assembly on a pouring template frame.
Description
Technical Field
The invention relates to the technical field, in particular to a prefabricated cover beam deep-buried anchor fixing template and a pouring method of a prefabricated cover beam.
Background
In the prior art, before the prefabricated bent cap is manufactured by pouring, the steel strand needs to be arranged in the prestressed corrugated pipe and subjected to prestressed tensioning, but in the actual construction process, the deeply-buried anchor sags under the action of self gravity on the prestressed corrugated pipe, and similarly, the corresponding position of the deeply-buried anchor and the prestressed corrugated pipe is easy to deviate, namely, the deeply-buried anchor and the prestressed corrugated pipe are arranged eccentrically, particularly, in the process of moving the prefabricated bent cap reinforcement cage, the relative position of each deeply-buried anchor relative to the prestressed corrugated pipe is difficult to fix, and further, the subsequent steel strand is tensioned and poured to manufacture the prefabricated bent cap to influence the influence.
Disclosure of Invention
The invention solves the technical problem that the position of a deep-buried anchor on a prestressed corrugated pipe is difficult to fix, and the deep-buried anchor can keep the technical effect of coaxial arrangement with the corresponding prestressed corrugated pipe by additionally arranging a positioning assembly on a pouring template frame.
In order to solve the problems, the invention provides a prefabricated cover beam deep-buried anchor fixing template which comprises a prefabricated cover beam reinforcement cage and a pouring template frame for installing the prefabricated cover beam reinforcement cage, wherein the pouring template frame is provided with a plurality of deep-buried anchor matching holes; the method comprises the following steps: the positioning assembly is arranged on the pouring template frame and is matched and connected with the deep-buried anchor matching hole; the prestressed corrugated pipe is connected into the prefabricated cover beam reinforcement cage; a deeply buried anchor connected to the pre-stressed corrugated pipe; and the corresponding positions of the deep-buried anchor and the prestressed corrugated pipe are coaxially arranged through the positioning assembly.
Compared with the prior art, the technical scheme has the following technical effects: through locating component makes deeply bury the anchor can with prestressing force bellows relevant position keeps coaxial to subsequent to locating steel strand wires in the prestressing force bellows carry out the stretch-draw.
In one example of the invention, the cast formwork frame is provided with two opposite end formworks; the deep-buried anchor matching holes are formed in the end template; the positioning assembly is provided with a plurality of positioning plates, and the positioning plates are arranged around the deeply-buried anchor matching holes.
Compared with the prior art, the technical scheme has the following technical effects: the locating plate is simple in structure and can effectively locate the corresponding deeply buried anchor.
In one embodiment of the invention, the positioning plate is in one-to-one fit connection with the deep-buried anchor matching holes; the locating plate is provided with a plurality of locating strip structures which are arranged around the deeply buried anchor matching holes at intervals.
Compared with the prior art, the technical scheme has the following technical effects: further improving the positioning effect on the deeply buried anchor.
In an example of the present invention, the number of the positioning strip-shaped structures surrounding the same deep-buried anchor matching hole is three, and the three positioning strip-shaped structures are arranged at equal intervals; when the positioning strip-shaped structure is matched and connected with the corresponding deep-buried anchor, the positioning strip-shaped structure is matched with an inner cavity of the deep-buried anchor.
In one example of the present invention, comprises: the anchorage device limiting reinforcing ring is sleeved on the prestressed corrugated pipe and clamped between the deeply-buried anchor in matched connection with the prestressed corrugated pipe and the corresponding deeply-buried anchor matching hole; the anchored reinforcing steel bar rod is fixedly connected to the prefabricated cover beam reinforcing cage; and the anchored reinforcing steel bar penetrates through the anchor limiting reinforcing steel ring to limit the position of the anchor limiting reinforcing steel ring relative to the prestressed corrugated pipe.
Compared with the prior art, the technical scheme has the following technical effects: the anchor limiting reinforcing ring is connected with the rear reinforcing rod of the anchor in a matched mode to limit the deep-buried anchor to move towards the direction far away from the end portion of the prestressed corrugated pipe on the prestressed corrugated pipe, so that the deep-buried anchor is prevented from sliding away from the prestressed corrugated pipe towards the direction far away from the positioning assembly under the action of thrust force from the positioning assembly in the process of matched connection of the deep-buried anchor and the corresponding positioning assembly, and the positioning difficulty is increased.
In one example of the invention, the pouring formwork frame is provided with a bottom formwork, two opposite side formworks and two opposite end formworks which are connected with each other; the method comprises the following steps: side form board pre-positioning assembly locates the side form board is kept away from one side of prefabricated bent cap steel reinforcement cage, side form board pre-positioning assembly includes: the fixed base is arranged on one side, far away from the prefabricated cover beam reinforcement cage, of the bottom template; the telescopic rod pieces are arranged between the corresponding side templates and the fixed base; the telescopic rod piece is rotatably connected with the side template and the fixed base.
Compared with the prior art, the technical scheme has the following technical effects: the size of an included angle formed by the side templates and a horizontal plane is changed by adjusting the extension and retraction of the telescopic rod piece, so that on one hand, the unstable conditions of shaking and the like of the two side templates on the bottom template are avoided, and the subsequent connection with other templates is influenced; in addition, because the side formworks are huge in size and difficult to accurately adjust manually, on the other hand, the two side formworks can move close to each other under the action of the extension of the telescopic rod, so that gaps are prevented from being formed in splicing among the formworks, and leakage is prevented from occurring in the subsequent concrete pouring process. Of course, in order to further improve the assembling efficiency and the assembling precision, a plurality of telescopic rods can be arranged between the fixed base and the side template.
In one example of the present invention, the telescopic link includes: one end of the first connecting rod is hinged with the fixed base, and a threaded hole is formed in the other end of the first connecting rod; and one end of the second connecting rod is in threaded connection with the threaded hole, and the other end of the second connecting rod is hinged with the corresponding side template.
Compared with the prior art, the technical scheme has the following technical effects: the telescopic rod piece is simple in structure, and a constructor can conveniently adjust the telescopic action of the telescopic rod piece in the actual process, so that the side formwork can be effectively pre-positioned.
In another aspect, the present invention further provides a method for casting a precast capping beam, including: s10: assembling the prefabricated cover beam deep-buried anchor fixing template in a prefabricated construction site; s20: pouring concrete into the pouring template frame to prepare a semi-finished prefabricated bent cap; the semi-finished precast bent cap is provided with a deep buried hole, and the deep buried hole is opposite to the deep buried anchor; s30: disassembling the pouring template frame, arranging the steel strand in the prestressed corrugated pipe, and performing prestressed tensioning; s40: and grouting the deep buried hole to obtain the prefabricated capping beam.
Compared with the prior art, the technical scheme has the following technical effects: the prefabricated capping beam is manufactured by pouring through the prefabricated capping beam deep-buried anchor fixing template, so that the structural strength of the prefabricated capping beam is improved.
In an example of the present invention, the S30 specifically includes: s31: disassembling the pouring template frame; s32: arranging a steel strand limiting plate in the deep-buried hole and connecting the steel strand limiting plate with the deep-buried anchor in a matching manner; s33: stretching a plurality of steel strands into the prestressed corrugated pipe through the steel strand limiting plate; s34: and pre-stressing the tension member by cooperating with the plurality of strands.
In an example of the present invention, the S32 specifically includes: s321: a traction assembly is arranged on one side of the steel strand limiting plate; s322: and one side of the steel strand limiting plate, which is provided with the traction assembly, is arranged on the deep-buried anchor in a direction deviating from the deep-buried hole.
Compared with the prior art, the technical scheme has the following technical effects: due to the fact that the caliber of the deep buried hole is small, a constructor cannot conveniently and directly detach the steel strand limiting plate, the constructor utilizes the traction rope to connect the traction assembly and draw the traction rope to take the steel strand limiting plate out of the deep buried hole, and difficulty in taking the steel strand limiting plate out of the corresponding deep buried hole is reduced.
After the technical scheme of the invention is adopted, the following technical effects can be achieved:
(1) the deep-buried anchor and the corresponding position of the prestressed corrugated pipe can keep coaxial through the positioning assembly, so that the steel strand arranged in the prestressed corrugated pipe can be tensioned subsequently;
(2) the anchor limiting reinforcing ring is connected with the rear reinforcing rod of the anchor in a matched mode to limit the deep-buried anchor to move towards the direction far away from the end portion of the prestressed corrugated pipe on the prestressed corrugated pipe, so that the deep-buried anchor is prevented from sliding away from the prestressed corrugated pipe towards the direction far away from the positioning assembly under the action of thrust force from the positioning assembly in the process of matched connection of the deep-buried anchor and the corresponding positioning assembly, and the positioning difficulty is increased.
Drawings
Fig. 1 is a schematic view illustrating a fitting relationship of a prefabricated cover beam reinforcement cage 100 in a jig frame 110 according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of the matching relationship between the deeply buried anchor 31 and the prestressed corrugated pipe 20.
Fig. 3 is a schematic view of the fitting relationship between the end mold plate 40 and the positioning plate 12.
Fig. 4 is a schematic structural view of another positioning plate 12 in fig. 3. .
Fig. 5 is a schematic view of the fitting relationship between the deep-buried anchor 31 and the positioning plate 12 shown in fig. 3.
Fig. 6 is a schematic diagram of the fitting relationship between the end forms 40 and the prefabricated cover beam reinforcement cage 100.
Fig. 7 is a schematic structural diagram of the strand limiting plate 80.
Fig. 8 is a schematic diagram of the matching relationship between the steel strand limiting plate 80 and the deeply buried anchor 31.
Fig. 9 is a schematic view of the connection between the sideform pre-positioning assembly 70 and the sideforms 60 and 50.
Fig. 10 is a schematic structural view of the telescopic rod 71 in fig. 9.
Fig. 11 is a sectional view of fig. 10.
Fig. 12 is a schematic flow chart of a casting method according to a second embodiment of the present invention.
Description of reference numerals:
100-prefabricating a cover beam reinforcement cage; 110-a jig frame; 11-deeply burying anchor matching holes; 12-a positioning plate; 20-prestressed bellows; 31-deeply burying an anchor; 40-end template; 50-bottom template; 51-casting side; 60-sideform; 70-sideform pre-positioning assembly; 71-telescoping rod members; 72-first half-threaded rod; 73-second half threaded rod; 74-a threaded tube; 75-a stationary base; 80-steel strand limiting plate; 81-a cyclic structure; 82-steel strand limiting hole.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The first embodiment is as follows:
referring to fig. 1, a schematic diagram of a fitting relationship of a prefabricated cover beam reinforcement cage 100 in a bed-jig 110 according to an embodiment of the present invention is shown.
Referring to fig. 2 to 6, the prefabricated cover beam deep-buried anchor fixing formwork includes, for example, a prefabricated cover beam reinforcement cage and a casting formwork frame for installing the prefabricated cover beam reinforcement cage 100, and the casting formwork frame is provided with a plurality of deep-buried anchor fitting holes 11.
Specifically, the precast capping beam deep-buried anchor fixed formwork comprises a positioning assembly, a prestressed corrugated pipe 20 and a deep-buried anchor 31, for example. The positioning assembly is arranged on the pouring template frame and is in matched connection with the deeply-buried anchor matching hole 11; the prestressed corrugated pipe 20 is connected into the prefabricated cover beam reinforcement cage 100; a deeply buried anchor 31 is attached to the prestressed corrugated pipe 20. Wherein the positioning assembly can be passed such that the deeply buried anchor 31 is coaxially arranged with the corresponding position of the prestressed corrugated pipe 20.
Seen by combining the actual construction situation, the deeply buried anchor 31 is under the effect of self gravity, and the position between the deeply buried anchor 31 and the prestressed corrugated pipe 20 is easily deviated, so that the deeply buried anchor 31 and the prestressed corrugated pipe 20 are eccentrically arranged, so that in the subsequent tensioning operation process, when the template frame is poured and the deeply buried anchor 31 is in matched connection, a plurality of deeply buried anchor matching holes 11 in the template frame cannot completely fall to the pipe orifice of the corresponding prestressed corrugated pipe 20, namely, a plurality of steel strands are correspondingly stretched into along the plurality of deeply buried anchor matching holes 11, and when the pipe orifice is formed, the steel strands cannot enter the inside of the prestressed corrugated pipe 20 due to the eccentric arrangement between the deeply buried anchor 31 and the prestressed corrugated pipe 20.
Preferably, the cast formwork frame comprises, for example, a bottom formwork 50, two opposite end formworks 40 and two opposite side formworks 60. The two opposite end templates 40 are mounted at two ends of the bottom template 50 along the length direction of the bottom template, the plurality of deeply-buried anchor matching holes 11 are formed in the two end templates 40, the prestressed corrugated pipe 20 is also arranged along the length direction of the bottom template 50, two ends of the prestressed corrugated pipe correspond to the corresponding deeply-buried anchor matching holes 11 respectively, and the deeply-buried anchors 31 are sleeved at positions, close to the ends of the prestressed corrugated pipe 20, of the prestressed corrugated pipe and are arranged opposite to the deeply-buried anchor matching holes 11; two opposing sideforms 60 are mounted to the base form 50 on either side in its width direction and the end forms 40 are interconnected with the sideforms adjacent thereto to form a casting space into which the prefabricated cover beam reinforcement cage 100 can be fitted.
Further, the positioning assembly is provided with a plurality of positioning plates 12. A plurality of locating plates 12 are located the side form 60 and are close to one side of prefabricated bent cap steel reinforcement cage 100, and locating plate 12 is connected with the one-to-one cooperation of burying anchor mating holes 11 deeply, and centers on corresponding setting of burying anchor mating holes 11 deeply.
In one embodiment, the number of the positioning strip structures surrounding the same deep-buried anchor matching hole 11 is three, and the three positioning strip structures are arranged at equal intervals. Generally, the deeply buried anchor 31 is a two-segment concentric circular structure having a first annular structure and a second annular structure. The first annular structure and the second annular structure are connected with each other and are arranged coaxially. The first annular structure is provided with a first connecting slot; the second annular structure is provided with a second connecting slotted hole which is the same as the first connecting slotted hole, and the caliber of the first connecting slotted hole is smaller than that of the second connecting slotted hole. Specifically, the outer diameter value of the first annular structure is less than or equal to the aperture value of the deep-buried anchor matching hole 11, so that when the first annular structure is matched and connected with the corresponding deep-buried anchor matching hole 11, the first annular structure enters the corresponding deep-buried anchor matching hole 11; in addition, the second annular structure is used to sleeve the pre-stressed corrugated pipe 20, and the inner cavity of the second annular structure is larger than the outer diameter of the corresponding pre-stressed corrugated pipe 20, so that the deeply embedded anchor 31 is eccentrically arranged.
Furthermore, each positioning plate 12 is provided with a plurality of positioning strip structures, and the plurality of positioning strip structures surround the corresponding deeply-buried anchor matching holes 11, and each positioning strip structure is arranged at intervals. Specifically, in order to further reduce the difficulty in positioning the positioning plate 12 on the deeply buried anchor 31, a plurality of the positioning strip structures may be arranged in a conical manner, that is, when each of the positioning strip structures extends in a direction away from the end template 40, an end portion of each of the positioning strip structures, which is away from the end template 40, is close to an axis direction of the deeply buried anchor mating hole 11 connected to the end template. Then, the diameter of a first matching end face formed by enclosing one end of the positioning strip-shaped structures far away from the end template 40 is smaller than the diameter of the inner cavity of the first annular structure; the diameter of the second matching end face formed by the plurality of positioning strip-shaped structures and surrounded to the end template 40 is equal to the diameter of the inner cavity of the first annular structure, and the length of the positioning strip-shaped structures is not more than the depth of the inner cavity of the first annular structure, so that the end template 40 cannot effectively position the deeply buried anchor 31 due to the overlong length of the positioning strip-shaped structures when the positioning strip-shaped structures and the end template are connected in a matching mode.
The process of calibrating the deeply buried anchor 31 to remain concentric with the corresponding location of the prestressed corrugated pipe 20 will be described in detail below:
the hoisting end formwork 40 is moved towards the prefabricated cover beam reinforcement cage 100, and due to the different eccentricity of the plurality of deeply buried anchors 31 on the respective prestressed corrugated pipes 20, although substantially all facing downwards in the vertical direction, there may be an eccentricity in the horizontal direction, or in other directions. Therefore, each of the deeply buried anchors can be connected to the corresponding position of the prefabricated cover beam reinforcement cage 100 by using a steel wire structure, so that the deeply buried anchor can be roughly positioned with the prestressed corrugated pipe 20, and the difficulty of correspondingly connecting the deeply buried anchor 31 to each deeply buried anchor matching hole 11 on the end formwork 40 can be reduced. Then, moving the end template 40, when the positioning strip-shaped structures contact the corresponding deeply buried anchors 31, finely adjusting the deflection angle of the end template 40 in the vertical direction to keep the opening direction of the positioning strip-shaped structures approximately the same as that of the plurality of deeply buried anchors 31, and then gently moving the end template 40 to make the plurality of first matching end surfaces enter the corresponding deeply buried anchors 31, and then continuously moving the end template 40 to make the matching depth of the plurality of positioning strip-shaped structures and the corresponding deeply buried anchors 31 increase until the end surface of the first annular structure far away from the second annular structure is attached to the corresponding end surface of the end template 40, at this time, the outer surface surrounded by the plurality of positioning strip-shaped structures is attached to the inner cavity of the deeply buried anchors 31, that is, the second matching end surface is completely filled into the inner cavity of the first annular structure, and the two are completely contacted. At this time, the corresponding positions of the deeply buried anchor 31 and the prestressed corrugated pipe 20 are kept coaxial, and the calibration operation is completed.
Of course, it is more preferable that at least one of the positioning strip structures is disposed above the corresponding deep-buried anchor matching hole 11 in the vertical direction, so that when the positioning strip structure enters the corresponding deep-buried anchor 31, the positioning strip structure can perform the calibration function on the deep-buried anchor 31 before the positioning strip structures at other positions, so that the positioning strip structure and the deep-buried anchor 31 are coaxially disposed.
The prefabricated capping beam deep-buried anchoring template comprises an anchorage device limiting reinforcing ring and an anchored reinforcing rod. The anchorage device limiting reinforcing steel ring is sleeved on the prestressed corrugated pipe 20 and clamped between a deep-buried anchor in matched connection with the prestressed corrugated pipe and the corresponding deep-buried anchor matching hole 11; the anchored reinforcing steel bar rod is fixedly connected with the prefabricated cover beam reinforcing cage 100, for example, the anchored reinforcing steel bar rod and the prefabricated cover beam reinforcing cage are welded; the post-anchor reinforcing steel bar is connected with the anchor limiting reinforcing steel ring in a matching manner to limit the position of the anchor limiting reinforcing steel ring relative to the prestressed corrugated pipe 20, namely, the position of the limiting deep-buried anchor 31 on the prestressed corrugated pipe 20, so that the situation that the deep-buried anchor 31 slides on the corresponding prestressed corrugated pipe 20 is avoided, and the positioning difficulty of the subsequent positioning assembly on the deep-buried anchor 31 is increased.
With reference to fig. 9-11, preferably, the prefabricated capping beam deep-buried anchoring fixed formwork includes, for example, sideforms, and the sideforms include the positioning assemblies, and the positioning assemblies are disposed on the side of the sideforms away from the prefabricated capping beam reinforcement cage 100. In particular, the sideforms include, for example, a fixed base 75 and a telescoping rod 71. The fixed base 75 is arranged on one side of the bottom template 50 far away from the precast cover beam reinforcement cage 100; the telescopic rod 71 is arranged between the corresponding side template 60 and the fixed base 75; the telescopic rod 71 is rotatably connected with the side mold plate 60, and similarly, the telescopic rod 71 is rotatably connected with the fixed base 75.
Preferably, the telescopic link 71 includes, for example, a first connecting rod and a second connecting rod. The first connecting rod is provided with a first end and a second end which are opposite, the first end is hinged with the fixed base 75, and a threaded hole is formed in the second end; the second connecting rod is provided with a third end and a fourth end which are opposite, the third end is connected with the threaded hole in a threaded mode so that the first connecting rod is connected with the second connecting rod in a threaded mode, and the fourth end is hinged with the corresponding side template 60.
In a specific embodiment, in order to enable the telescopic rod 71 to stably adjust the angle of the sideform 60, the telescopic rod 71 may further comprise, for example, a first half-threaded rod 72, a second half-threaded rod 73 and a threaded pipe 74, wherein one end of the first half-threaded rod 72 is provided with a first thread for screwing the threaded pipe 74, and the other opposite end is provided with a first connection hole, and is rotatably connected to the first connection seat on the fixed base 75 through a connection shaft; the threaded pipe 74 is clamped between the first half-threaded rod 72 and the second half-threaded rod 73 and is provided with a threaded through hole; one end of the second half-threaded rod 73 is provided with a second thread for screwing the threaded pipe 74, and the opposite end is provided with a second connection hole through which the second connection seat on the side mold plate 60 rotates. Thus, the angle of the sideform 60 can be adjusted by adjusting the threaded tube 74 to vary the depth to which the first and second half-threaded rods 72, 73 are threaded, thereby enabling the sideform 60 to be mated with another sideform.
In a specific embodiment, the number of the side formworks is two, the side formworks are in one-to-one fit connection with the side formworks 60, and the corresponding side formworks 60 can be in a close connection state with other formworks through telescopic rods, so that on one hand, the formworks can be conveniently spliced; on the other hand, the side turning of the pouring formwork frame is avoided.
Example two:
referring to fig. 12, it is a schematic flow chart of a pouring method of a precast capping beam according to a second embodiment of the present invention. With reference to fig. 1 to fig. 11, the casting method according to the second embodiment of the present invention is described in detail, and the casting method includes:
step S10: and assembling the precast capping beam deep-buried anchor fixing template in the precast construction site.
Step S20: and pouring concrete into the pouring template frame to obtain a semi-finished prefabricated bent cap.
Step S30: and (5) disassembling the pouring template frame, and arranging the steel strand in the prestressed corrugated pipe 20 for prestressed tensioning.
Step S40: and grouting the deep buried hole to obtain the prefabricated capping beam.
The step S10 specifically includes:
step S11: on a construction site, a release agent is coated on an inner cavity of the pouring template frame, so that when concrete is poured into the pouring template frame to obtain a prefabricated cover beam, the prefabricated cover beam can be successfully separated from the pouring template frame in the process of hoisting the prefabricated cover beam, and the demolding difficulty is reduced. In addition, prefabricated bent cap reinforcement cage 100 is assembled and formed on jig frame 110.
In addition, the concrete process of assembling the pouring template frame is as follows: hoisting the bottom template 50 to the prefabricated site by using a crane, enabling the pouring side 51 of the bottom template to face the upper part in the vertical direction, polishing the pouring side 51 of the bottom template 50, and then coating a release agent on the bottom template; and then hoisting the prefabricated cover beam reinforcement cage 100 to the position above the side formwork 60 by using a portal frame, finely adjusting the position of the prefabricated cover beam reinforcement cage 100 relative to the bottom formwork 50, and placing the prefabricated cover beam reinforcement cage 100 on the bottom formwork 50 after the adjustment is finished. Wherein, install a plurality of prestressing force corrugated pipe 20 on prefabricated bent cap steel reinforcement cage 100 to fix prestressing force corrugated pipe 20 to on prefabricated bent cap steel reinforcement cage 100 with the mounting.
After the step S11 is completed, go to step S12: the two end formworks 40 are lifted successively, the end formworks 40 move towards the direction of the bottom formwork 50, the end formworks 40 and the bottom formwork 50 keep a pre-installation interval, the anchorage limiting reinforcing steel ring is sleeved on the prestressed corrugated pipe 20, then the deeply-buried anchors 31 are installed at positions, close to the two ends of the prestressed corrugated pipe 20, of the corresponding prestressed corrugated pipe 20, and after the positions of the deeply-buried anchors 31 on the prestressed corrugated pipe 20 meet the construction requirements, the anchored reinforcing steel bars are fixed to the prefabricated cover beam reinforcement cage 100 and penetrate through the ring structures of the anchorage limiting reinforcing steel ring to limit the positions of the anchored reinforcing steel bars on the prestressed corrugated pipe 20, and therefore the deeply-buried anchors 31 are prevented from moving on the outer surface of the prestressed corrugated pipe 20 towards the direction of the anchorage limiting reinforcing steel ring. Then, a constructor utilizes the steel wire structure to pre-adjust the deeply buried anchor 31 to enable the deeply buried anchor 31 and the prestressed corrugated pipe 20 to be coaxially arranged, then the end formwork 40 is hoisted to the bottom formwork 50, the deeply buried anchor 31 and the deeply buried anchor matching hole 11 in the end formwork 40 are matched and connected, and at the moment, the hoisting equipment keeps the position of the end formwork 40 relative to the bottom formwork 50 still.
After the step S12 is completed, go to step S13: the two side formworks 60 are respectively hoisted to the corresponding positions of the bottom formwork 50 and pre-positioned, and then the positions between the end formwork 40 and the adjacent side formworks 60 are adjusted, so that the two can be connected in a matched manner. Specifically, such that there is a threaded connection between the end form 40 and the sideform 60. At this time, the precast capping beam deep-buried anchor template is obtained, and the process goes to the step S20.
In another embodiment, sideforms may be pre-positioned using the positioning assembly for pre-positioning the position of sideforms 60 on the base form 50. Specifically, when the bottom formwork 50 is lifted in the air by the lifting device, the fixed base 75 is placed on a construction site, and then the bottom formwork 50 is placed on the fixed base 75, other operation processes are as described in the above steps S12 and S13, wherein when the side formworks 60 are attached to the adjacent end formwork 40, the telescopic rod members 71 are respectively connected to the side formworks 60 and the fixed base 75, and the size of the included angle formed between the side formworks 60 and the horizontal plane is changed by adjusting the telescopic rod members 71 to extend or retract, so that unstable conditions such as shaking and the like of the two side formworks 60 on the bottom formwork 50 are avoided, and the connection between the subsequent side formworks and other formworks is influenced; in addition, because the size of the sideforms 60 is huge, it is difficult to accurately adjust the sideforms by manual work, and on the other hand, the two sideforms 60 can move close to each other by the extension action of the telescopic rod 71, so that gaps are prevented from being formed in splicing among the sideforms, and leakage is prevented from occurring in the subsequent concrete pouring process. Of course, in order to further improve the assembling efficiency and the assembling precision, a plurality of telescopic bars 71 may be provided between the stationary base 75 and the side mold plate 60.
The step S20 specifically includes: and after the prefabricated bent cap deep-buried anchor fixing template is obtained through assembly, concrete is poured into the prefabricated bent cap deep-buried anchor fixing template through grouting equipment, so that a semi-finished prefabricated bent cap is obtained.
Wherein the deeply buried anchor 31 is disposed on the semi-finished precast capping beam, that is, a deeply buried hole is formed at a corresponding position of the semi-finished precast capping beam to expose the deeply buried anchor 31 to the air. Go to said step 30.
Preferably, the step S30 specifically includes:
step S31: and disassembling the pouring template frame.
Step S32: and arranging a steel strand limiting plate 80 in the deep-buried hole and connecting the steel strand limiting plate with the deep-buried anchor 31 in a matching manner.
Step S33: and (4) extending the steel strands into the prestressed corrugated pipe 20 through the steel strand limiting plate 80.
Step S34: and pre-stressing the tension member by cooperating with the plurality of strands. And when the prestress tension operation is completed, the step S40 is performed.
Wherein, the step S32 specifically includes:
step S321: and a traction assembly is arranged on one side of the steel strand limiting plate 80. The constructor can connect one end of the traction rope to the traction assembly and hold the other end of the traction rope to pull the traction rope, so that the steel strand limiting plate 80 connected with the traction rope is taken out of the corresponding deep buried hole, and the difficulty in disassembling the steel strand limiting plate 80 is reduced.
Step S322: one side of the steel strand limiting plate 80, which is provided with the traction assembly, is arranged on the deeply buried anchor 31 in a direction deviating from the deeply buried hole.
In one embodiment, the strand retainer plate 80 is a circular plate, and the pulling assembly includes, for example, a ring structure 81, and the ring structure 81 is fixedly disposed at a center of the circular plate in a welded manner, so that the strand retainer plate 80 can be easily removed from the deep hole by pulling the ring structure 81. Specifically, before the steel strand limiting plate 80 is installed in the deep buried hole, one end of the traction rope can be wound on the annular structure 81, and then the steel strand limiting plate 80 is installed in the deep buried hole and is matched and connected with the deep buried anchor 31 in the deep buried hole, and at the moment, the corresponding positions of the deep buried anchor 31, the steel strand limiting plate 80 and the prestressed corrugated pipe 20 are concentrically arranged, so that multiple steel strands can sequentially enter the prestressed corrugated pipe 20 through the steel strand limiting plate 80 and the deep buried anchor 31. Furthermore, the tensioning piece is arranged at the position corresponding to the plurality of steel strands, and then is matched and connected with the plurality of steel strands, so that the prestressed tensioning operation is performed on the steel strands. The steel strand limiting plate 80 is provided with a plurality of evenly distributed steel strand limiting holes 82, and a plurality of steel strands respectively penetrate through the corresponding steel strand limiting holes 82 and enter the prestressed corrugated pipe 20.
Of course, the number of the ring-shaped structures 81 may be three, and the ring-shaped structures are arranged at equal intervals around the circle center of the book searching circular plate, so that the steel strand limiting plate 80 can be conveniently taken out from the corresponding deep buried hole through the traction rope.
Wherein, the tensioning member can be for the punching jack, lays two respectively at each bundle of steel strand wires both ends the punching jack, through right the stretch-draw at steel strand wires both ends can be accurately effectively controlled be in the last tensile stress that forms of steel strand wires, with only right the one end of steel strand wires is carried out the stretch-draw and is compared, and the mode of both ends stretch-draw simultaneously has to pass power well, makes right the steel strand wires stretch-draw abundant, the little advantage of prestressing loss, in addition, uses the punching jack is comparatively economical.
When the step S322 is completed, the process goes to the step S40.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims.
Claims (7)
1. A prefabricated cover beam deep-buried anchor fixing template comprises a prefabricated cover beam reinforcement cage and a pouring template frame for mounting the prefabricated cover beam reinforcement cage, wherein the pouring template frame is provided with a plurality of deep-buried anchor matching holes; the pouring formwork frame comprises a bottom formwork, two opposite end formworks and two opposite side formworks; it is characterized by comprising:
the positioning assembly is arranged on the pouring template frame and is matched and connected with the deep-buried anchor matching hole;
the prestressed corrugated pipe is connected into the prefabricated cover beam reinforcement cage;
a deeply buried anchor connected to the pre-stressed corrugated pipe; the deep-buried anchor matching holes are formed in the end template; the positioning assembly is provided with a plurality of positioning plates, the positioning plates are arranged around the deep-buried anchor matching holes in a surrounding mode, the positioning plates are arranged on one side, close to the prefabricated cover beam reinforcement cage, of the side template, the positioning plates are in one-to-one corresponding matched connection with the deep-buried anchor matching holes and arranged around the corresponding deep-buried anchor matching holes; the positioning plate is provided with a plurality of positioning strip-shaped structures which are arranged around the deep-buried anchor matching holes at intervals; when the positioning strip-shaped structure is matched and connected with the corresponding deep-buried anchor, the positioning strip-shaped structure is matched with an inner cavity of the deep-buried anchor;
and the corresponding positions of the deep-buried anchor and the prestressed corrugated pipe are coaxially arranged through the positioning assembly.
2. The prefabricated cover beam deep-buried anchor fixing template as claimed in claim 1, comprising:
the anchorage device limiting reinforcing ring is sleeved on the prestressed corrugated pipe and clamped between the deeply-buried anchor in matched connection with the prestressed corrugated pipe and the corresponding deeply-buried anchor matching hole;
the post-anchor steel bar rod is fixedly connected to the prefabricated cover beam steel reinforcement cage;
and the anchored reinforcing steel bar penetrates through the anchorage device limiting reinforcing steel ring so as to limit the position of the anchorage device limiting reinforcing steel ring relative to the prestressed corrugated pipe.
3. The prefabricated cover beam deep-buried anchor fixing template as claimed in claim 1, wherein the pouring template frame is provided with a bottom template, two opposite side templates and two opposite end templates which are connected with each other; the method comprises the following steps:
side form board pre-positioning assembly locates the side form board is kept away from one side of prefabricated bent cap steel reinforcement cage, side form board pre-positioning assembly includes:
the fixed base is arranged on one side, far away from the prefabricated cover beam reinforcement cage, of the bottom template;
the telescopic rod pieces are arranged between the corresponding side templates and the fixed base; the telescopic rod piece is rotatably connected with the side template and the fixed base.
4. The prefabricated capping beam deep-buried anchor fixing formwork as claimed in claim 3, wherein the telescopic rod member comprises:
one end of the first connecting rod is hinged with the fixed base, and a threaded hole is formed in the other end of the first connecting rod;
and one end of the second connecting rod is in threaded connection with the threaded hole, and the other end of the second connecting rod is hinged with the corresponding side template.
5. A pouring method of a prefabricated capping beam is characterized by comprising the following steps:
s10: assembling the prefabricated capping beam deep-buried anchor fixing formwork according to any one of claims 1 to 4 at a prefabricated construction site;
s20: pouring concrete into the pouring template frame to prepare a semi-finished prefabricated bent cap; the semi-finished precast bent cap is provided with a deep buried hole, and the deep buried hole is opposite to the deep buried anchor;
s30: disassembling the pouring template frame, arranging the steel strand in the prestressed corrugated pipe, and performing prestressed tensioning;
s40: and grouting the deep buried hole to obtain the prefabricated capping beam.
6. The casting method according to claim 5, wherein the S30 specifically comprises:
s31: disassembling the pouring template frame;
s32: arranging a steel strand limiting plate in the deep-buried hole and connecting the steel strand limiting plate with the deep-buried anchor in a matching manner;
s33: stretching a plurality of steel strands into the prestressed corrugated pipe through the steel strand limiting plate;
s34: and carrying out prestress tensioning on the steel strands by matching a tensioning member with the steel strands.
7. The casting method according to claim 6, wherein the S32 specifically comprises:
s321: a traction assembly is arranged on one side of the steel strand limiting plate;
s322: and one side of the steel strand limiting plate, which is provided with the traction assembly, is arranged on the deep-buried anchor in a direction deviating from the deep-buried hole.
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| CN202110619071.XA CN113510837B (en) | 2021-06-03 | 2021-06-03 | Prefabricated cover beam deep-buried anchor fixing template and pouring method |
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| CN2623744Y (en) * | 2003-04-04 | 2004-07-07 | 晖毅预力器材股份有限公司 | Prestressing force rear tensing system modularized device |
| CN108824198A (en) * | 2018-06-27 | 2018-11-16 | 中国二冶集团有限公司 | A kind of buried anchor hole and template |
| CN108858692A (en) * | 2018-07-19 | 2018-11-23 | 中建局集团第建筑有限公司 | A kind of prefabricated PC component locating template component, assembly method and PC component |
| KR102300325B1 (en) * | 2018-11-30 | 2021-09-09 | (주)연우피씨엔지니어링 | Wet-type hoolw pc member production apparatus using coorrugated tube and production method using the same |
| CN110480803B (en) * | 2019-08-06 | 2021-05-11 | 安徽巢湖路桥建设集团有限公司 | Special forming die for precast beam plate |
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