CN212201013U - Novel underground factory building bridge crane girder bearing platform structure - Google Patents
Novel underground factory building bridge crane girder bearing platform structure Download PDFInfo
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- CN212201013U CN212201013U CN202020714870.6U CN202020714870U CN212201013U CN 212201013 U CN212201013 U CN 212201013U CN 202020714870 U CN202020714870 U CN 202020714870U CN 212201013 U CN212201013 U CN 212201013U
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Abstract
The utility model discloses a novel underground factory building bridge crane girder bearing platform structure, including rock mass and cantilever beam, the cantilever beam divide into embedding section and cantilever section, it has the embedded groove to excavate on the rock mass, the embedding section and the embedded groove gomphosis of cantilever beam, the cantilever beam includes vertical muscle and stirrup, the stirrup cover is established in the outside of vertical muscle, vertical muscle is laid around the cantilever beam and stretches out from the terminal surface of the embedding section of cantilever beam, the tip of embedded groove is cut a plurality of first embedding pore, vertical muscle and the gomphosis of first embedding pore, the utility model discloses cut out the embedded groove with the embedding section gomphosis of cantilever beam on the rock mass, through embedding the cantilever beam in the rock mass, realize the stability improvement of bridge crane girder bearing structure, when solving in the prior art when the rock wall quality is poor, the frictional force between cantilever beam and the rock mass makes and take place the plasticity to destroy between cliff and the sloping, thereby causing the structural instability of the rock anchor beam.
Description
Technical Field
The utility model belongs to the technical field of water conservancy and hydropower technique underground factory building construction, specifically belong to a novel underground factory building bridge crane girder load-bearing platform structure.
Background
Electromechanical equipment of an underground powerhouse of a large hydropower station needs to be hoisted by a bridge crane, the crane beam bearing platform of the bridge crane is used as a bearing structure of the bridge crane, and the bearing capacity of the crane beam bearing platform of the bridge crane can be adapted to the load of the bridge crane. Current factory building rock load-bearing platform is mostly rock anchor roof beam reinforced structure, is about to the rock anchor roof beam and arranges the slope step face of rock mass in, makes the roof beam remain stable through the anchor power between stock and the rock mass and the frictional force between rock anchor roof beam and the cliff to through running through the anchor rope, provide long-term fastening power.
The prior art can be applicable to the condition that factory building rock mass intensity is high, of high quality, and the anchor quality can obtain guaranteeing, and frictional force can the firm effect of full play, but when the cliff quality was relatively poor, frictional force between cliff and the cliff probably can make cliff and sloping take place the plastic failure, and then leads to the structural instability of cliff.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the prior art, the utility model provides a novel underground factory building bridge crane beam load-bearing platform structure under the relatively poor condition of cliff quality, through the mode of rock mass embedding cantilever beam, realizes bridge crane beam load-bearing structure's stability.
In order to achieve the above object, the utility model provides a following technical scheme: a novel bearing platform structure of crane beams of underground plant bridges comprises cantilever beams, wherein each cantilever beam comprises longitudinal ribs and stirrups, the longitudinal ribs are arranged in a plurality of rows in parallel, the stirrups are sleeved on the outer sides of the longitudinal ribs in the plurality of rows, the longitudinal ribs in the plurality of rows are all bound on the stirrups, and each cantilever beam comprises an embedded section embedded into an embedded groove of a rock body and a cantilever section extending out of the rock body; the embedded section of the cantilever beam is embedded with the embedded groove, and cement is poured in the embedded section and the cantilever section.
Furthermore, the tip of embedded groove is dug has the first embedding pore of a plurality of, indulge muscle and first embedding pore gomphosis.
Furthermore, the cantilever beam also comprises an inclined rib, and the inclined rib is bound with the hoop rib and the longitudinal rib.
Furthermore, the upper part of the cantilever beam is provided with a plurality of rows of longitudinal ribs.
Furthermore, an anchor cable is further arranged in the cantilever beam, the anchor cable extends out of the end face of the embedding section of the cantilever beam, and a second embedding hole channel which is correspondingly embedded with the anchor cable is further drilled at the end part of the embedding groove.
Furthermore, a ground anchor cable is further arranged in the cantilever beam, the ground anchor cable extends out of the side edge of the embedding section, and a third embedding hole channel which is correspondingly embedded with the ground anchor cable is formed in the embedding groove in a chiseled mode.
Furthermore, the third embedding hole is formed in the bottom of the embedding groove and close to the end face of the embedding groove.
Furthermore, a backfill grouting pipe is further arranged in the cantilever beam and penetrates through the end face of the embedded section and the end face of the cantilever section of the cantilever beam.
Compared with the prior art, the utility model, following beneficial effect has at least: the utility model discloses a dig out on the rock mass with the embedded groove of the embedding section gomphosis of cantilever beam, through with in the cantilever beam embedding rock mass, realize that bridge crane roof beam bearing structure's stability improves, when the cliff quality is poor among the solution prior art, frictional force between cantilever beam and the rock mass makes and takes place the plastic destruction between cliff and the sloping, and then leads to the structure unstability problem of rock anchor beam, the utility model discloses an in super digging the rock mass, with in the cantilever beam embedding rock mass, increased area of contact and the anti kink rigidity between cantilever beam and the rock mass, improved the atress performance of cantilever beam, the utility model discloses a stability is higher, and the bearing capacity of cantilever beam has obtained further promotion, reduces the requirement of rock mass, and application scope is wider.
Further, the utility model discloses a still be provided with a plurality of in the cantilever beam and indulge the muscle, a plurality of anchor rope and a plurality of ground anchor rope, increase the stability of being connected of cantilever beam and rock mass, the atress performance of cantilever beam has also further been strengthened, and still be provided with in the embedded groove and indulge the muscle with every, anchor rope and ground anchor rope correspond the complex embedding pore, make on cantilever beam and rock mass pass through the embedding section and the basis of embedded groove gomphosis, the muscle is indulged to the rethread, anchor rope and ground anchor rope are connected the rock mass with the cantilever beam, thereby make the further promotion of the area of contact of rock mass and cantilever beam, the anti kink rigidity between cantilever beam and the rock mass has also further been promoted, the atress performance of cantilever beam has been improved, thereby the bearing capacity of messenger's cantilever.
Further, the utility model discloses still the ligature has the diagonal rib on the basis of indulging muscle and stirrup, increases the bending resistance bearing capacity of the oblique cross-section of cantilever beam, improves bearing structure's shear behavior.
Furthermore, the upper portion of cantilever beam is provided with the vertical muscle of a plurality of rows, has solved the cantilever beam during actual operation upper portion and can bear great pulling force's problem, increases the bearing capacity of cantilever beam, has also improved the life of cantilever beam simultaneously.
Further, the utility model discloses a ground anchor cable stretches out from the side of the embedding section of cantilever beam, and is connected fixedly with the bottom of embedding section, and fully provided is when applying the load to the cantilever beam, and the ascending trend of embedding section of cantilever beam improves the performance of cantilever beam, further strengthens the bearing capacity of cantilever beam, lets the stability between cantilever beam and the rock mass obtain bigger promotion.
Further, the utility model discloses a still be provided with backfill grouting pipe in the cantilever beam, ensure through backfill grouting pipe that the hole between rock mass and the cantilever beam carries out abundant packing, guaranteed contact area and joint strength between rock mass and the cantilever beam, improved the stability between cantilever beam and the rock mass simultaneously.
Drawings
FIG. 1 is a schematic view of a rib body fit structure between a cantilever beam and a rock body;
fig. 2 is a cross-sectional view of the cantilever beam a-a of fig. 1.
In the drawings: 1-rock mass, 2-embedded groove, 3-cantilever beam, 31-embedded section, 32-cantilever section, 4-ground anchor cable, 5-anchor cable, 6-stirrup, 7-longitudinal bar, 8-diagonal bar and 9-backfill grouting pipe.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, the utility model provides a novel underground factory building bridge crane girder load-bearing platform structure, including rock mass 1 and cantilever beam 3, cantilever beam 3 divide into embedding section 31 and cantilever beam section 32, according to the most unfavorable load that cantilever beam 3 bore, confirm the cross-sectional form and the embedding depth of cantilever beam 3, dig out embedded groove 2 in rock mass 1 according to cross-sectional form and embedding depth, specifically, the most unfavorable load comprises dead load (mainly including the cantilever beam) and live load (mainly including bridge crane and hoisting equipment), carry out load combination and calculate maximum shear force, moment of flexure and moment of torsion, preset the cross-sectional form and the embedding depth of most unfavorable load department, according to the relevant standard of concrete structure design, carry out the reinforcement calculation, carry out the recheck after the reinforcement finishes, the section form and the depth are redesigned if the recheck does not pass through, until the recheck passes through; then embedding the embedding section 31 of the cantilever beam 3 with the embedding groove 2 of the rock body 1;
as shown in fig. 2, in this embodiment, the longitudinal bars 7 and the stirrups 6 form a cantilever beam 3, a plurality of rows of longitudinal bars are arranged in parallel, the stirrups 6 are sleeved outside the plurality of rows of longitudinal bars 7, the plurality of rows of longitudinal bars are all bound on the stirrups, the longitudinal bars 7 are arranged around the cantilever beam 3 and extend out from the end surface of the embedding section 31 of the cantilever beam 3, preferably, a plurality of first embedding holes are drilled on the end surface of the embedding groove 2, the longitudinal bars 7 are correspondingly embedded in each first embedding hole, further, the longitudinal bars 7 are divided into upper longitudinal bars, middle longitudinal bars and lower longitudinal bars to form an initial structure of the cantilever beam 3, the longitudinal bars 7 are sleeved in the stirrups 6, and the longitudinal bars 7 and the stirrups 6 are fixed by iron wires; preferably, because the utility model discloses a torsion is great to the curved scissors, during the 6 arrangement of reinforcement of stirrup, superposes three internal force arrangement of reinforcement combination, further improvement overall structure's factor of safety.
In the preferred embodiment of this embodiment, the cantilever beam 3 is further provided with an oblique rib 8, the oblique rib 8 is bound and fixed with the longitudinal rib 7 and the stirrup 6 through iron wires, the general expansion direction of the oblique section crack of the beam bearing platform is from a branch point (the lower part of the interface of the cantilever beam and the rock wall) to a load point, and the direction of the oblique rib 8 is larger than the direction and is intersected at a large angle, so that the bending resistance bearing capacity and the shearing resistance bearing capacity of the oblique section of the beam bearing platform are improved.
Since the upper part of the load-bearing structure is subjected to a large pulling force, in the preferred embodiment, the upper part of the cantilever beam 3 is provided with a plurality of rows of longitudinal ribs 7; wherein, the row number of the cantilever beams 3 can be determined by calculation.
In this embodiment, an anchor cable 5 is further disposed in the cantilever beam 3, the anchor cable 5 extends out from an end surface of the embedded section 31 of the cantilever beam 3, a second embedded hole is further disposed on an end surface of the embedded groove 2, and the anchor cable 5 is correspondingly embedded into the second embedded hole; preferably, the anchor cable 5 is provided with a plurality of second embedding holes, and the embedding grooves 2 are correspondingly provided with a plurality of second embedding holes.
Furthermore, a plurality of ground anchor cables 4 are further arranged in the cantilever beam 3, the ground anchor cables 4 extend out of the side edge of the embedding section 31, a third embedding hole is formed in the embedding groove 2, and the ground anchor cables 4 are correspondingly embedded into the third embedding hole; preferably, the ground anchor cable 4 is provided with a plurality of third embedding holes, and a plurality of third embedding holes are correspondingly arranged in the embedding groove 2;
in the preferred embodiment of the present embodiment, since the embedding section 31 tends to be upward when a load is applied to the cantilever beam 6, the third embedding hole is disposed at the bottom of the embedding groove 2 and is disposed close to the end surface of the embedding groove 2, so as to improve the usability of the cantilever beam 3.
In the preferred embodiment of the present embodiment, a backfill grouting pipe 9 is further disposed in the cantilever beam 3, and the backfill grouting pipe 9 penetrates through the end face of the embedded section 31 of the cantilever beam 3 and the end face of the cantilever section 32 of the cantilever beam 3.
The utility model discloses a construction steps as follows:
step 1: determining the section form and the embedding depth of the cantilever beam 3 according to the worst load borne by the cantilever beam 3;
specifically, the worst load consists of a dead load (mainly comprising a cantilever beam) and a live load (mainly comprising a bridge crane and hoisting equipment), the maximum shearing force, bending moment and torque are calculated by load combination, the section form and the embedding depth of the worst load are preset, reinforcement calculation is carried out according to the relevant specifications of concrete structure design, after reinforcement is finished, rechecking is carried out, and the section form and the depth are redesigned until the rechecking is passed;
step 2: excavating an embedded groove 2 in the rock body 1 according to the section form and the embedding depth of the cantilever beam 3;
and step 3: cutting a plurality of longitudinal ribs 7 and embedded hole channels of anchor cables 5 at the end part of the embedded groove 2, and cutting a plurality of embedded hole channels of anchor cables 4 at the bottom of the embedded groove 2;
and 4, step 4: laying longitudinal bars 7, stirrups 6 and diagonal bars 8, binding a steel bar framework, laying a backfill grouting pipeline, anchor cables 5 and ground anchor cables 4, and applying pretightening force to the ground anchor cables 4; specifically, the ground anchor cable 4 applies pre-tightening force by adopting a post-tensioning method, namely pre-embedding, and then applying the pre-tightening force by adopting a jack after the concrete strength meets the requirement.
And 5: and pouring concrete to form a rock mass-cantilever beam bearing structure, performing backfill grouting through a top backfill grouting pipe 9, applying pretightening force to the anchor cable 5, and reinforcing the bearing structure by using the anchor cable 5 and the ground anchor cable 4 in the same pretightening force applying mode.
The utility model cuts the embedded groove 2 embedded with the embedded section 31 of the cantilever beam 3 on the rock body 1, and by embedding the cantilever beam 3 in the rock body 1,
furthermore, the utility model discloses an excavation embedded groove 2 on rock mass 1, lay the framework of steel reinforcement in embedded groove 2, then form rock mass-cantilever beam bearing structure through pouring framework of steel reinforcement, the rock mass-cantilever beam bearing structure who is located embedded groove 2 provides the holding power for overall structure, the rock mass-cantilever beam bearing structure who is located the embedded groove 2 outside is the part that overall structure bears the load, through excavation rock mass 1, with the holding power part of cantilever beam 3 and the embedded groove 2 cooperation, realize the stability improvement of bridge crane beam bearing structure, solve in the prior art when the rock wall quality is poor, the frictional force between cantilever beam 3 and rock mass 1 makes the plastic failure take place between rock wall and the sloping, and then lead to the problem of the structural instability of anchor beam, the utility model discloses a stability is higher, the bearing capacity of cantilever beam 3 has obtained further promotion, the utility model discloses requirement to rock mass 1 is lower, and application scope is wider, and the beam-supported structure has also increased beam-supported structure and rock mass 1's area of contact with the 2 cooperations of embedded groove simultaneously, moreover the utility model discloses an embedded pore has still been dug in the embedded groove 2, and further area of contact that increases beam-supported structure and rock mass 1 increases the atress scope of beam-supported structure, and the bearing load is higher.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a novel underground factory building bridge crane beam load-bearing platform structure, a serial communication port, including cantilever beam (3), cantilever beam (3) are including indulging muscle (7) and stirrup (6), it has a plurality of rows to indulge muscle parallel arrangement, stirrup (6) cover is established in a plurality of rows indulge the outside of muscle (7), a plurality of rows indulge the equal ligature of muscle on the stirrup, embedding section (31) in embedded groove (2) of cantilever beam (3) including embedding rock mass (1) and cantilever section (32) that stretch out rock mass (1) embedding section (31) and embedded groove (2) gomphosis of cantilever beam (3), embedding section (31) with cement has all been pour in cantilever section (32).
2. The novel crane beam bearing platform structure of the underground powerhouse bridge according to claim 1, wherein a plurality of first embedding holes are formed in the end portion of the embedding groove (2) in a chiseled mode, and the longitudinal ribs (7) are embedded in the first embedding holes.
3. The novel crane beam bearing platform structure of the underground factory building bridge crane according to claim 1, wherein the cantilever beam (3) further comprises an inclined rib (8), and the inclined rib (8) is bound with the stirrup (6) and the longitudinal rib (7).
4. A novel crane beam bearing platform structure of an underground plant bridge crane according to claim 1, characterized in that the upper part of the cantilever beam (3) is provided with a plurality of rows of longitudinal ribs (7).
5. The novel crane beam bearing platform structure of the underground factory building bridge crane according to claim 1, wherein an anchor cable (5) is further arranged in the cantilever beam (3), the anchor cable (5) extends out from the end face of the embedding section (31) of the cantilever beam (3), and a second embedding hole which is correspondingly embedded with the anchor cable (5) is further drilled at the end part of the embedding groove (2).
6. The novel crane beam bearing platform structure of the underground powerhouse bridge according to claim 1, wherein a ground anchor cable (4) is further arranged in the cantilever beam (3), the ground anchor cable (4) extends out of the side edge of the embedding section (31), and a third embedding hole which is correspondingly embedded with the ground anchor cable (4) is drilled in the embedding groove (2).
7. The novel crane beam bearing platform structure of the underground powerhouse bridge according to claim 6, wherein the third embedding hole is arranged at the bottom of the embedding groove (2) and close to the end face of the embedding groove (2).
8. The novel crane beam bearing platform structure of the underground factory building bridge crane according to claim 1, wherein a backfill grouting pipe (9) is further arranged in the cantilever beam (3), and the backfill grouting pipe (9) penetrates through the end face of the embedded section (31) and the end face of the cantilever section (32) of the cantilever beam (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020714870.6U CN212201013U (en) | 2020-04-30 | 2020-04-30 | Novel underground factory building bridge crane girder bearing platform structure |
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| CN202020714870.6U CN212201013U (en) | 2020-04-30 | 2020-04-30 | Novel underground factory building bridge crane girder bearing platform structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111424880A (en) * | 2020-04-30 | 2020-07-17 | 中国葛洲坝集团第三工程有限公司 | Novel bearing platform structure for crane beam of bridge crane of underground factory building and construction method of bearing platform structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111424880A (en) * | 2020-04-30 | 2020-07-17 | 中国葛洲坝集团第三工程有限公司 | Novel bearing platform structure for crane beam of bridge crane of underground factory building and construction method of bearing platform structure |
| CN111424880B (en) * | 2020-04-30 | 2024-07-09 | 中国葛洲坝集团第三工程有限公司 | Underground factory building bridge crane beam bearing platform structure and construction method thereof |
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