CN220652868U - Cable support protection structure crossing deep foundation pit - Google Patents
Cable support protection structure crossing deep foundation pit Download PDFInfo
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- CN220652868U CN220652868U CN202322263696.4U CN202322263696U CN220652868U CN 220652868 U CN220652868 U CN 220652868U CN 202322263696 U CN202322263696 U CN 202322263696U CN 220652868 U CN220652868 U CN 220652868U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 189
- 239000010959 steel Substances 0.000 claims abstract description 189
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 58
- 229910052742 iron Inorganic materials 0.000 claims description 29
- 238000003466 welding Methods 0.000 claims description 15
- 229920001903 high density polyethylene Polymers 0.000 claims description 10
- 239000004700 high-density polyethylene Substances 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 238000009412 basement excavation Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
A cable support protection structure crossing a deep foundation pit comprises a porous cable bridge, steel sheet piles, a supporting structure and a steel bearing member; the steel sheet piles and the porous cable bridge are buried underground, two ends of the porous cable bridge are erected on the supporting structure, the supporting structure is arranged on the foundation, the number of the steel sheet piles is two, the steel sheet piles are respectively positioned at two sides of the comprehensive pipe gallery foundation pit, and steel pipe supports are arranged between the two rows of steel sheet piles; the steel bearing component comprises a longitudinal beam, a cross beam and a threaded steel adjusting suspender, the longitudinal beam and the cross beam are horizontally arranged and mutually perpendicular in direction, the longitudinal beam is erected on a ground cushion layer, the cross beam is suspended below the longitudinal beam through the threaded steel adjusting suspender, the cross beam spans the bottom of the porous cable bridge, and the cross beam is used for supporting the porous cable bridge. The steel sheet pile can support and stop water, has small occupied area, can effectively prevent the cable pipeline from being deformed due to overweight and has high strength, and the porous cable bridge is supported by the support structure and the steel bearing member, and belongs to the technical field of underground engineering construction.
Description
Technical Field
The utility model relates to the technical field of underground engineering construction, in particular to a cable support protection structure crossing a deep foundation pit.
Background
With the high-speed development of urban construction, the urban underground utility tunnel with high-efficiency intensification is widely popularized and applied, and in the underground utility tunnel construction, deep foundation pit engineering is generally involved, on one hand, the deep foundation pit engineering has larger excavation width and deeper depth, uneven settlement is easy to generate, even adverse effects such as inclination and cracking are easy to generate, the safety of surrounding building (structures) is threatened, and particularly, when the underground water is abundant and the area close to a river channel is constructed, the construction difficulty is high and the danger is high. On the other hand, the existing urban underground pipelines are distributed in a staggered and complicated way, the original underground pipelines are more, the cross operation is more, the construction environment is complicated, the original pipelines cannot be migrated or are difficult to migrate, the existing cable pipelines are required to be protected in situ in construction under the condition, and the excavation safety of the foundation pit is required to be ensured while the safety of the pipelines is not influenced.
Disclosure of Invention
Aiming at the technical problems existing in the prior art, the utility model aims at: the cable support protection structure crossing the deep foundation pit can better protect the existing pipeline.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a cable support protection structure crossing a deep foundation pit comprises a porous cable bridge, steel sheet piles, a supporting structure and a steel bearing member; the steel sheet piles and the porous cable bridge are buried underground, two ends of the porous cable bridge are erected on the supporting structure, the supporting structure is arranged on the foundation, the number of the steel sheet piles is two, the two rows of steel sheet piles are respectively positioned at two sides of the foundation pit of the comprehensive pipe gallery, and steel pipe supports are arranged between the two rows of steel sheet piles; the steel bearing member comprises a longitudinal beam, a cross beam and a threaded steel adjusting suspender, the longitudinal beam and the cross beam are horizontally arranged and mutually perpendicular in direction, the longitudinal beam is erected on the ground cushion layer, the cross beam is suspended below the longitudinal beam through the threaded steel adjusting suspender, the cross beam spans the bottom of the porous cable bridge, and the cross beam is used for supporting the porous cable bridge; the multi-hole cable bridge comprises a steel truss, a multi-layer cable support is arranged in the steel truss, a clamping groove iron sheet is arranged on the cable support, and the clamping groove iron sheet is used for clamping a cable pipeline.
After adopting this kind of structure, the steel sheet pile can support and stagnant water, prevents river water and groundwater from penetrating the foundation ditch from porous cable testing bridge below and constitutes the security threat, and porous cable testing bridge buries underground, erects in utility tunnel's top, and area is little, and porous cable testing bridge is supported through bearing structure and steel bearing component, can prevent effectively that cable pipeline from overweight and deforming, and intensity is high.
As one preferable mode, the upper end of the deformed steel bar adjusting suspender penetrates through the longitudinal beam and is in threaded connection with an upper nut, an upper base plate is further arranged between the longitudinal beam and the upper nut, the lower end of the deformed steel bar adjusting suspender penetrates through the cross beam and is in threaded connection with a lower nut, and a lower base plate is further arranged between the cross beam and the lower nut.
Preferably, the longitudinal beam and the transverse beam are composed of a plurality of double-spliced I-steel.
As one preferable mode, the double-spliced I-steel is formed by welding two I-steels, a gap is reserved between the two I-steels, through holes are formed in the upper base plate and the lower base plate, the threaded steel adjusting suspender penetrates through the gap and the through holes, the longitudinal beam and the upper base plate are connected through a welding line to form a whole, and the cross beam and the lower base plate are connected through the welding line to form a whole.
Preferably, the clearance between the two I-beams is 30mm, the outer diameter of the threaded steel adjusting suspender is 30mm, and the diameter of the through hole is 32mm.
Preferably, the two rows of steel sheet piles are symmetrically distributed along the center of the porous cable bridge, and two ends of the steel tube support are respectively fixed on the two rows of steel sheet piles.
Preferably, the side face of the steel sheet pile is fixedly provided with a supporting steel enclosing purlin and steel corbels, the steel pipe supports and is fixed on the supporting steel enclosing purlins at two sides, and the supporting steel enclosing purlins are located at the top ends of the steel corbels.
As one preferable mode, the supporting structure comprises a cushion layer, a foundation and anchor bars, wherein the cushion layer is formed by casting C15 plain concrete, the foundation is formed by casting C25 concrete, anchor bar holes for driving the anchor bars are formed in the foundation, the anchor bars adopt HPB300 steel bars, and the steel truss is fixedly arranged above the foundation through the anchor bars.
Preferably, the number of the cable brackets is four, each layer of cable bracket is composed of a plurality of L56 x 6mm angle steels, the angle steels of each layer of cable bracket are positioned on the same horizontal plane, the angle steels are welded in the steel truss, and the clamping groove iron sheet is welded on the cable bracket.
As one preferable mode, the novel high-density polyethylene (HDPE) pipe further comprises a plurality of groups of clamping groove iron sheets, each group of clamping groove iron sheets comprises a plurality of clamping groove iron sheets which are linearly arranged at intervals, the adjacent clamping groove iron sheets form a mounting groove, and the HDPE pipe passes through the mounting groove.
In general, the utility model has the following advantages: the utility model solves the problem of limited construction of a new construction comprehensive pipe rack (under special geological conditions and under the condition that the original pipeline spans), the existing pipeline does not need to be changed to other positions, the construction cost is saved, and meanwhile, the disturbance to the existing pipeline is reduced.
Drawings
Fig. 1 is a schematic side view of a cable lug protection structure spanning a deep foundation pit.
Fig. 2 is a schematic top view of a porous cable bridge.
Fig. 3 is a schematic cross-sectional view of a porous cable tray.
Fig. 4 is a schematic side view of a porous cable tray.
Fig. 5 is a schematic view of hoisting a porous cable tray.
1 is an upper backing plate, 2 is an upper nut, 3 is a lower backing plate, 4 is a threaded steel adjusting suspender, 5 is a longitudinal beam, 6 is a steel sheet pile, 7 is a cushion layer, 8 is a foundation, 9 is an angle steel of type A, 10 is an angle steel of type B, 11 is a square steel sheet, 12 is a supporting steel enclosing purlin, 13 is a steel bracket, 14 is a steel pipe support, 15 is a utility tunnel, 16 is an anchor bar hole, 17 is a C-shaped angle steel, 18 is a clamping groove iron sheet, 19 is an HDPE pipe, 20 is 10cm thick C25 impermeable concrete, 21 is a cross beam, and 22 is a lower nut.
Detailed Description
The utility model will be described in further detail with reference to the drawings and the detailed description.
Example 1
As shown in fig. 1 to 5, a cable support protection structure crossing a deep foundation pit comprises a porous cable bridge, a steel sheet pile, a supporting structure and a steel bearing member; the steel sheet piles and the porous cable bridge are buried underground, two ends of the porous cable bridge are erected on the supporting structure, the supporting structure is arranged on the foundation, the number of the steel sheet piles is two, the two rows of steel sheet piles are respectively positioned at two sides of the foundation pit of the comprehensive pipe gallery, and steel pipe supports are arranged between the two rows of steel sheet piles; the steel bearing member comprises a longitudinal beam, a cross beam and a threaded steel adjusting suspender, the longitudinal beam and the cross beam are horizontally arranged and mutually perpendicular in direction, the longitudinal beam is erected on the ground cushion layer, the cross beam is suspended below the longitudinal beam through the threaded steel adjusting suspender, the cross beam spans the bottom of the porous cable bridge, and the cross beam is used for supporting the porous cable bridge; the multi-hole cable bridge comprises a steel truss, a multi-layer cable support is arranged in the steel truss, a clamping groove iron sheet is arranged on the cable support, and the clamping groove iron sheet is used for clamping a cable pipeline.
The upper end of the screw-thread steel adjusting suspender passes through the longitudinal beam and is in threaded connection with an upper nut, an upper backing plate is further arranged between the longitudinal beam and the upper nut, the lower end of the screw-thread steel adjusting suspender passes through the cross beam and is in threaded connection with a lower nut, and a lower backing plate is further arranged between the cross beam and the lower nut.
The longitudinal beam and the transverse beam are composed of a plurality of double-spliced I-steel. The I-steel is 120a I-steel.
The double-spliced I-steel is formed by welding two I-steels, a gap is reserved between the two I-steels, through holes are formed in the upper base plate and the lower base plate, the threaded steel adjusting suspender penetrates through the gap and the through holes, the longitudinal beam and the upper base plate are connected through a welding seam to form a whole, and the cross beam and the lower base plate are connected through the welding seam to form a whole.
The upper backing plate and the lower backing plate are steel backing plates with the thickness of 200 x 16 mm.
The length direction of the porous cable bridge is parallel to the length direction of the longitudinal beam.
The clearance between two I-steel is 30mm, and the external diameter of screw-thread steel regulation jib is 30mm, and the diameter of through-hole is 32mm.
The two rows of steel sheet piles are symmetrically distributed along the center of the porous cable bridge, and two ends of the steel tube support are respectively fixed on the two rows of steel sheet piles.
The side of steel sheet pile is fixed to be provided with and is supported steel and enclose purlin and steel bracket, and the steel pipe supports to be fixed in and supports on the steel purlin, and the steel purlin that encloses of support is located the top of steel bracket.
The steel corbel is the triangle-shaped support of constituteing by angle steel and two steel rib plates concatenation, and the angle steel welds in the side of steel sheet pile and supports the bottom that the steel encloses the purlin, and two steel rib plates slope sets up in the angle steel both sides. The angle steel is L80 x 8@1000 type angle steel.
The supporting structure comprises a cushion layer, a foundation and anchor bars, wherein the cushion layer is formed by casting C15 plain concrete, the foundation is formed by casting C25 concrete, anchor bar holes for driving the anchor bars are formed in the foundation, the anchor bars adopt HPB300 steel bars, and the steel truss is fixedly arranged above the foundation through the anchor bars.
The quantity of cable support is four-layer, and every layer of cable support comprises the angle steel of many L56 6mm models, and many angle steel of every layer of cable support are located same horizontal plane, and the angle steel welds in the inside of steel truss, and the draw-in groove iron piece welds on the cable support.
The spacing between two adjacent layers of cable brackets is 250mm.
Still include the HDPE pipe, the quantity of draw-in groove iron sheet is the multiunit, and every group draw-in groove iron sheet includes a plurality of draw-in groove iron sheets that are linear interval and arrange, and adjacent draw-in groove iron sheet forms the mounting groove, and the HDPE pipe passes from the mounting groove.
The interval between two adjacent draw-in groove iron sheets in every group draw-in groove iron sheet is 80mm, and every layer welding a set of draw-in groove iron sheet, a set of including 5, the cross-section of draw-in groove iron sheet is the hexagon.
The steel truss is a cuboid frame structure formed by welding various angle steels, the angle steels forming the steel truss comprise angle steels of three different types of A type, B type and C type, wherein the size of the angle steels of A type is L125 x 12mm, the size of the angle steels of B type is L63 x 6mm, and the size of the angle steels of C type is L56 x 6mm. The A-shaped angle steel is arranged on four corners of the cuboid frame structure, two A-shaped angle steels on the left side and the right side are welded through C-shaped angle steels, and two A-shaped angle steels on the upper end and the lower end are welded and fixed through B-shaped angle steels. Square steel sheets are welded at the four corners of the bottom of the steel truss respectively, and each square steel sheet is provided with four mounting holes with the aperture phi 24, and the size of each square steel sheet is 350 mm or 250mm.
The construction of the structure mainly comprises the steps of steel sheet pile support, steel pipe transverse support, steel truss welding assembly, pipeline clamping groove iron sheets, phi 160HDPE pipes, porous cable bridge support and protection, cushion layer, foundation, concrete on-site pouring and sealing porous cable bridge, concrete maintenance construction and the like. The embodiment is operated in complex areas of construction environments such as rich groundwater, adjacent river channels, existing buildings (structures) and the like, and the specific construction steps are as follows.
And 1, supporting construction of the steel sheet pile. And (3) applying single-row IV-shaped steel sheet piles with the length of 18 meters on two sides of the foundation pit of the utility tunnel, and enabling the porous cable bridge to cross over the utility tunnel. Considering that the underground water in the foundation pit area of the utility tunnel is abundant, the water level burial depth is shallower, one side of the foundation pit is close to a river channel, the water inflow amount of excavation is large, the other side is close to a building and a road, the original underground pipelines are more, the cross operation is more, the road traffic flow is large, the construction environment is complex, therefore, 6 15 m single-row IV-shaped steel sheet piles are respectively applied to the two sides of the foundation pit, which are spanned by a porous cable bridge, are used for better supporting and water stopping, the river water and the underground water are prevented from penetrating into the foundation pit from the lower part of the porous cable bridge to form a safety threat, and by adopting the construction method, the excavation range is small, the occupied area is small, the original road traffic is not influenced, and the quick construction can be realized.
And 2, erecting a steel pipe transverse support. The supporting steel purlin is designed into double-spliced I45c I-steel with the width of 70cm and the height of 47.4cm by adopting a phi 609 x 12@6000 steel pipe. The steel pipe support is processed in a factory and assembled on site, and the steel pipe support is made of Q235b. Before the steel pipe support is installed, firstly, steel corbels for fixedly supporting the steel purlin are installed on the steel sheet pile, then, a tray for supporting the steel purlin and the steel pipe support is installed, and cross wires for the steel pipe support are placed on the tray.
And 3, manufacturing and erecting the porous cable bridge. And 4 layers of 6 rows of porous cable bridges are manufactured, and the bridges are positioned above the utility tunnel, and the size of the bridges is 13000 x 1300 x 1100mm. Firstly, welding and assembling steel trusses, and welding three types of angle steels of which the thickness is equal to L125 x 12mm, L63 x 6mm and L56 x 6mm. Square steel sheets are welded at four corners of the bottom of the steel truss, four layers of angle steel are welded in the bridge frame to serve as cable supports, pipelines are placed, clamping groove iron sheets are welded on the cable supports, after welding is completed, 6 rows of phi 160HDPE pipes are erected on the 4 layers of cable supports, and the HDPE pipes are fixed by using the shape of the mounting groove formed by the clamping groove iron sheets, so that displacement is prevented.
And 4, supporting and protecting the porous cable bridge. The lower part of the longitudinal beam is directly erected on a cushion layer with flat ground, and the cross beam is transversely arranged at the bottom of the porous cable bridge frame at intervals of 5 m.
And 5, cushion layer and foundation construction. And constructing a C15 plain concrete cushion layer with the thickness of 10cm at the bottom of the foundation, wherein the foundation under the cushion layer is kept flat and dry, foam water is strictly forbidden, and the mixing ratio, slump and the like of the concrete meet the design rules. And (3) foundation construction is carried out after the cushion layer meets the design strength requirement, anchor bars are pre-buried during construction, cold working steel bars are not adopted, four anchor bar holes phi 24 are formed in each foundation, square steel sheets are welded at four corners, the position and the verticality of hole sites are guaranteed in the construction process, and hole port grouting is filled fully after the anchor bars are driven in.
And 6, encapsulating the porous cable bridge by concrete. Because the surrounding environment is complex, the porous cable bridge and pipelines are better protected by adopting 10cm thick C25 impermeable concrete to cast and encapsulate the porous cable bridge on site. The porous cable bridge is used as a framework, and seepage-proof concrete is poured after the HDPE pipe is placed, so that pipelines can be effectively prevented from being damaged by infiltration of rainwater, underground water and the like. After the utility tunnel is completed, the existing pipeline is not required to be additionally changed to other positions.
And 7, curing the concrete. Covering a plastic film on the concrete surface within 12 hours after pouring, and maintaining the concrete in a moisture-preserving way, so as to prevent water loss of the concrete, promote hydration of the concrete and avoid cracks.
The above examples are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present utility model should be made in the equivalent manner, and the embodiments are included in the protection scope of the present utility model.
Claims (10)
1. The utility model provides a span cable support protection architecture of deep basal pit which characterized in that: the device comprises a porous cable bridge, steel sheet piles, a supporting structure and a steel bearing member;
the steel sheet piles and the porous cable bridge are buried underground, two ends of the porous cable bridge are erected on the supporting structure, the supporting structure is arranged on the foundation, the number of the steel sheet piles is two, the two rows of steel sheet piles are respectively positioned at two sides of the foundation pit of the comprehensive pipe gallery, and steel pipe supports are arranged between the two rows of steel sheet piles;
the steel bearing member comprises a longitudinal beam, a cross beam and a threaded steel adjusting suspender, the longitudinal beam and the cross beam are horizontally arranged and mutually perpendicular in direction, the longitudinal beam is erected on the ground cushion layer, the cross beam is suspended below the longitudinal beam through the threaded steel adjusting suspender, the cross beam spans the bottom of the porous cable bridge, and the cross beam is used for supporting the porous cable bridge;
the multi-hole cable bridge comprises a steel truss, a multi-layer cable support is arranged in the steel truss, a clamping groove iron sheet is arranged on the cable support, and the clamping groove iron sheet is used for clamping a cable pipeline.
2. A cable lug protection structure for a deep foundation pit as defined in claim 1, wherein: the upper end of the screw-thread steel adjusting suspender passes through the longitudinal beam and is in threaded connection with an upper nut, an upper backing plate is further arranged between the longitudinal beam and the upper nut, the lower end of the screw-thread steel adjusting suspender passes through the cross beam and is in threaded connection with a lower nut, and a lower backing plate is further arranged between the cross beam and the lower nut.
3. A cable lug protection structure for a deep foundation pit as defined in claim 2, wherein: the longitudinal beam and the transverse beam are composed of a plurality of double-spliced I-steel.
4. A cable lug protection structure for a deep foundation pit as claimed in claim 3, wherein: the double-spliced I-steel is formed by welding two I-steels, a gap is reserved between the two I-steels, through holes are formed in the upper base plate and the lower base plate, the threaded steel adjusting suspender penetrates through the gap and the through holes, the longitudinal beam and the upper base plate are connected through a welding seam to form a whole, and the cross beam and the lower base plate are connected through the welding seam to form a whole.
5. A cable lug protection structure for a deep foundation pit as defined in claim 4 wherein: the clearance between two I-steel is 30mm, and the external diameter of screw-thread steel regulation jib is 30mm, and the diameter of through-hole is 32mm.
6. A cable lug protection structure for a deep foundation pit as defined in claim 1, wherein: the two rows of steel sheet piles are symmetrically distributed along the center of the porous cable bridge, and two ends of the steel tube support are respectively fixed on the two rows of steel sheet piles.
7. A cable lug protection structure for a deep foundation pit as defined in claim 1, wherein: the side of steel sheet pile is fixed to be provided with and is supported steel and enclose purlin and steel bracket, and the steel pipe supports and is fixed in both sides and supports on the steel and enclose the purlin, and the support steel encloses the purlin and is located the top of steel bracket.
8. A cable lug protection structure for a deep foundation pit as defined in claim 1, wherein: the supporting structure comprises a cushion layer, a foundation and anchor bars, wherein the cushion layer is formed by casting C15 plain concrete, the foundation is formed by casting C25 concrete, anchor bar holes for driving the anchor bars are formed in the foundation, the anchor bars adopt HPB300 steel bars, and the steel truss is fixedly arranged above the foundation through the anchor bars.
9. A cable lug protection structure for a deep foundation pit as defined in claim 1, wherein: the quantity of cable support is four-layer, and every layer of cable support comprises the angle steel of many L56 6mm models, and many angle steel of every layer of cable support are located same horizontal plane, and the angle steel welds in the inside of steel truss, and the draw-in groove iron piece welds on the cable support.
10. A cable lug protection structure for a deep foundation pit as defined in claim 9, wherein: still include the HDPE pipe, the quantity of draw-in groove iron sheet is the multiunit, and every group draw-in groove iron sheet includes a plurality of draw-in groove iron sheets that are linear interval and arrange, and adjacent draw-in groove iron sheet forms the mounting groove, and the HDPE pipe passes from the mounting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322263696.4U CN220652868U (en) | 2023-08-22 | 2023-08-22 | Cable support protection structure crossing deep foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322263696.4U CN220652868U (en) | 2023-08-22 | 2023-08-22 | Cable support protection structure crossing deep foundation pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220652868U true CN220652868U (en) | 2024-03-22 |
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ID=90296109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322263696.4U Active CN220652868U (en) | 2023-08-22 | 2023-08-22 | Cable support protection structure crossing deep foundation pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220652868U (en) |
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2023
- 2023-08-22 CN CN202322263696.4U patent/CN220652868U/en active Active
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