CN214741396U - Continuous girder steel structure of prestressed anchorage cable - Google Patents
Continuous girder steel structure of prestressed anchorage cable Download PDFInfo
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- CN214741396U CN214741396U CN202022931633.8U CN202022931633U CN214741396U CN 214741396 U CN214741396 U CN 214741396U CN 202022931633 U CN202022931633 U CN 202022931633U CN 214741396 U CN214741396 U CN 214741396U
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Abstract
The utility model discloses a continuous girder steel structure of prestressed anchorage cable, design and construction method is suitable for consolidating weak country rock underground cavern, adopts continuous girder steel to replace concrete wall, has strengthened the wholeness that the anchor rope was strutted, has stronger adaptability to the big deformation of country rock, compares concrete structure, adopts continuous girder steel to connect the anchor rope and has stronger adaptability to the big deformation of country rock, and steel intensity is higher than the concrete, and consequently required girder steel height is little, can reduce the space and occupy. The structure includes anchor rope, steel anchor head, girder steel, the girder steel includes a plurality of shaped steel of arranging along the country rock, and a plurality of steel anchor heads are arranged to the girder steel side, the country rock is inserted to anchor rope one end, and the anchor rope other end is fixed in through the steel anchor head the girder steel.
Description
Technical Field
The utility model belongs to the technical field of the rock engineering is consolidated, a be suitable for the continuous girder steel structure of prestressed anchorage cable of consolidating weak surrounding rock underground cavern is related to, be favorable to promoting the overall stability of weak surrounding rock underground cavern to realize the purpose of quick construction.
Background
Underground works are generally selected to be built in well-conditioned formations. Limited geological exploration and complex geological conditions, however, result in subterranean caverns being localized within weak surrounding rock. Except for conventional measures such as encryption of common anchor rods and thickening of concrete sprayed layers, the method usually considers that a prestressed anchor cable is adopted to anchor shallow loose ring rock to a deep stable rock layer. When the weak surrounding rock is low in strength and causes large deformation of the surrounding rock, the weak surrounding rock is replaced by the rigid concrete wall, and the concrete wall is pulled by the prestressed anchor cables. The rigid concrete wall and the isolated prestressed anchor cables form an active supporting system, and the overall stability of the weak surrounding rock is improved. However, the concrete wall and prestressed anchor cable combined structure is used for reinforcing weak surrounding rocks, and important consideration is needed to avoid cracking of the concrete wall body caused by large deformation of the weak surrounding rocks.
SUMMERY OF THE UTILITY MODEL
The utility model relates to an overcome the above-mentioned weak point of concrete wall and prestressed anchorage cable integrated configuration among the prior art, adopt continuous girder steel to replace concrete wall, strengthened anchor rope support's wholeness, provided and be suitable for consolidating weak country rock underground cavern, to the great deformation of country rock a prestressed anchorage cable continuous girder steel structure that has stronger adaptability.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses a prestressed anchorage cable girder steel structure, the structure is applicable to and consolidates weak surrounding rock underground cavern, including anchor rope, steel anchor head, girder steel, the girder steel includes a plurality of shaped steel of arranging along the surrounding rock, and a plurality of steel anchor heads are arranged to the girder steel side, the surrounding rock is inserted to anchor rope one end, and the anchor rope other end is fixed in through the steel anchor head the girder steel.
Preferably, the steel beam comprises four I-shaped section steels horizontally arranged along the surrounding rock, and two section steels arranged side by side are respectively arranged above and below the anchor cable.
Preferably, a gap for accommodating the anchor cable to pass through is reserved between the section steel positioned above the anchor cable and the section steel positioned below the anchor cable, and an isolation cushion block is arranged in the gap.
Preferably, a connecting steel plate is arranged on the outer side of the steel beam and is connected with the top surfaces of the flanges of all the section steels at the same time.
As preferred, the steel anchor head includes top backing plate, bottom surface backing plate, middle part steel pipe and floor, and top backing plate and bottom surface backing plate are connected respectively to middle part steel pipe both ends, and the contained angle between top backing plate and the bottom surface backing plate corresponds the inclination of anchor rope, the floor is the radioactivity and arranges around the middle part steel pipe, and top backing plate and bottom surface backing plate are connected respectively to the floor both ends.
Preferably, the bottom base plate is connected with the steel beam, and the boundary of the bottom base plate exceeds the web plates of the steel sections at the uppermost row and the lowermost row.
Preferably, a plurality of temporary steel brackets are arranged below the steel beam and fixed on the surrounding rock by anchor bars.
Preferably, the surface of the surrounding rock is paved with a sprayed concrete layer, and the non-shrinkage material fills the gap between the steel beam and the sprayed concrete layer.
Therefore, the utility model discloses following beneficial effect has: (1) the steel section beams with sufficient rigidity and strength are adopted to connect prestressed anchor cables with the same elevation, and the prestressed anchor cables share and coordinate the deformation of surrounding rocks, so that the stress of the anchor cables is balanced, and the risk that the force of the anchor cables exceeds the designed tonnage is reduced; (2) the prestressed anchor cable continuous steel beam structure is used for serially connecting the point supporting force provided by the anchor cable into a strip supporting force, so that the overall stability of the cavern is improved; (3) compared with a concrete structure, the anchor cable connected by the continuous steel beams has stronger adaptability to large deformation of surrounding rocks, and the strength of steel is higher than that of concrete, so that the required steel beams are small in height, and the occupied space can be reduced; (4) the steel member processing is mainly completed in a factory, and the construction in the hole is not influenced. The steel beam is convenient to mount, and the construction period is saved.
Drawings
FIG. 1 is the utility model provides a pair of be suitable for the continuous girder steel structure schematic diagram of prestressed anchorage cable of consolidating weak country rock underground cavern.
Fig. 2 is the utility model provides a pair of be suitable for the cross-sectional view of the continuous girder steel structure of prestressed anchorage cable of consolidating weak country rock underground cavern.
The figure is marked with: 1. an anchor cable; 2. a steel anchor head; 201. a top backing plate; 202. a bottom surface base plate; 203. a middle steel pipe; 204. a rib plate; 3. temporary steel corbels; 4. a steel beam; 5. no shrinkage material is poured; 6. spraying a concrete layer; 7. surrounding rocks; 8. isolating the cushion blocks; 9. and connecting the steel plates.
Detailed Description
The invention is further described with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 and 2, the utility model discloses a prestressed anchorage cable girder steel structure, the structure is applicable to and consolidates weak country rock underground cavern, characterized by, including anchor rope 1, steel anchor head 2, girder steel 4 includes a plurality of shaped steel of arranging along the country rock, and a plurality of steel anchor heads 2 are arranged to 4 sides of girder steel, the country rock is inserted to 1 one end of anchor rope, and 1 other end of anchor rope is fixed in through steel anchor head 2 girder steel 4.
The steel beam 4 comprises four I-shaped section steels horizontally arranged along the surrounding rock, and two section steels arranged side by side are respectively arranged on the upper part and the lower part of the anchor cable 1. A gap for accommodating the anchor cable 1 to pass through is reserved between the section steel positioned above the anchor cable 1 and the section steel positioned below the anchor cable 1, and an isolation cushion block 8 is arranged in the gap. And a connecting steel plate 9 is arranged on the outer side of the steel beam 4, and the connecting steel plate 9 is simultaneously connected with the top surfaces of the flanges of all the section steels.
The steel anchor head 2 comprises a top base plate 201, a bottom base plate 202, a middle steel pipe 203 and a rib plate 204, wherein the two ends of the middle steel pipe 203 are respectively connected with the top base plate 201 and the bottom base plate 202, the included angle between the top base plate 201 and the bottom base plate 202 corresponds to the inclination angle of the anchor cable 1, the rib plate 204 is arranged around the middle steel pipe 203 in a radioactive mode, and the two ends of the rib plate 204 are respectively connected with the top base plate 201 and the bottom base plate 202. The bottom plate 202 is connected with the steel beam 4, and the boundary of the bottom plate 202 exceeds the web plates of the steel sections at the uppermost row and the lowermost row.
A plurality of temporary steel brackets 3 are arranged below the steel beam 4, and the temporary steel brackets 3 are fixed on surrounding rocks by anchor bars. A sprayed concrete layer 6 is paved on the surface of the surrounding rock 7, and a shrinkage-free material 5 is filled in a gap between the steel beam 4 and the sprayed concrete layer 6.
The utility model adopts the steel section beams with enough rigidity and strength to connect the prestressed anchor cables with the same elevation, and the prestressed anchor cables share and coordinate the deformation of the surrounding rock, thereby balancing the stress of the anchor cables and reducing the risk that the force of the anchor cables exceeds the designed tonnage; the prestressed anchor cable continuous steel beam structure is used for serially connecting the point supporting force provided by the anchor cable into a strip supporting force, so that the overall stability of the cavern is improved; compared with a concrete structure, the anchor cable connected by the continuous steel beams has stronger adaptability to large deformation of surrounding rocks, and the strength of steel is higher than that of concrete, so that the required steel beams are small in height, and the occupied space can be reduced; the steel member processing is mainly completed in a factory, and the construction in the hole is not influenced. The steel beam is convenient to mount, and the construction period is saved.
Claims (8)
1. The utility model provides a continuous girder steel structure of prestressed anchorage cable, the structure is applicable to and consolidates weak country rock underground cavern, characterized by, including anchor rope (1), steel anchor head (2), girder steel (4) include a plurality of shaped steel of arranging along the country rock, and a plurality of steel anchor heads (2) are arranged to girder steel (4) side, the country rock is inserted to anchor rope (1) one end, and anchor rope (1) other end is fixed in through steel anchor head (2) girder steel (4).
2. The structure of the prestressed anchor cable continuous steel beam as claimed in claim 1, wherein the steel beam (4) comprises four i-shaped sections horizontally arranged along the surrounding rock, and two sections arranged side by side are respectively arranged above and below the anchor cable (1).
3. The continuous steel beam structure of the prestressed anchor cable as claimed in claim 2, wherein a gap for accommodating the anchor cable (1) is left between the section steel located above the anchor cable (1) and the section steel located below, and a spacer block (8) is provided in the gap.
4. The prestressed anchor cable continuous steel girder structure of claim 2, wherein a connection steel plate (9) is provided outside the steel girder (4), and the connection steel plate (9) is simultaneously connected to top surfaces of flanges of all the section steels.
5. The continuous steel beam structure of the prestressed anchor cable as claimed in claim 1, wherein the steel anchor head (2) comprises a top base plate (201), a bottom base plate (202), a middle steel tube (203) and a rib plate (204), the two ends of the middle steel tube (203) are respectively connected with the top base plate (201) and the bottom base plate (202), an included angle between the top base plate (201) and the bottom base plate (202) corresponds to an inclined angle of the anchor cable (1), the rib plate (204) is radially arranged around the middle steel tube (203), and the two ends of the rib plate (204) are respectively connected with the top base plate (201) and the bottom base plate (202).
6. The prestressed anchor rope continuous steel girder structure of claim 5, wherein the bottom plate (202) is connected to the steel girder (4), and the boundary of the bottom plate (202) exceeds the webs of the uppermost and lowermost steel girders.
7. The continuous steel beam structure of the prestressed anchorage cable as claimed in claim 1, wherein a plurality of temporary steel corbels (3) are arranged below the steel beam (4), and the temporary steel corbels (3) are fixed on the surrounding rock by anchor bars.
8. The continuous steel beam structure of a prestressed anchorage cable as claimed in claim 1, wherein the shotcrete layer (6) is laid on the surface of the surrounding rock (7), and the non-shrink material (5) fills the gap between the steel beam (4) and the shotcrete layer (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022931633.8U CN214741396U (en) | 2020-12-09 | 2020-12-09 | Continuous girder steel structure of prestressed anchorage cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022931633.8U CN214741396U (en) | 2020-12-09 | 2020-12-09 | Continuous girder steel structure of prestressed anchorage cable |
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| Publication Number | Publication Date |
|---|---|
| CN214741396U true CN214741396U (en) | 2021-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022931633.8U Active CN214741396U (en) | 2020-12-09 | 2020-12-09 | Continuous girder steel structure of prestressed anchorage cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214741396U (en) |
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2020
- 2020-12-09 CN CN202022931633.8U patent/CN214741396U/en active Active
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