CN216765900U - U-shaped combined structure for in-situ protection of high-voltage cable pipe - Google Patents
U-shaped combined structure for in-situ protection of high-voltage cable pipe Download PDFInfo
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- CN216765900U CN216765900U CN202220309946.6U CN202220309946U CN216765900U CN 216765900 U CN216765900 U CN 216765900U CN 202220309946 U CN202220309946 U CN 202220309946U CN 216765900 U CN216765900 U CN 216765900U
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Abstract
The utility model relates to a U-shaped combined structure for in-situ protection of a high-voltage cable pipe, wherein the in-situ protection structure of the system comprises a bottom supporting section steel, a supporting beam, a suspension side plate, a laminated plate, a reinforcing end pivot, an anchor rod, row piles and MJS piles; the combined bottom plate is tightly attached to the electric pipeline bottom plate firmly, a laminated plate covers the combined bottom plate, the hanging side plate is arranged between the combined bottom plate and the supporting beam, and the combined bottom plate and the hanging side plate form a U-shaped protection structure; the support beam is provided with a permanent cover plate for recovering traffic on the ground; and reinforcing an end interruption area of the station by adopting an MJS cement system to form a reinforced end pivot, inserting and fixing the end pivot by adopting an anchor rod, and then excavating by a reverse method. The utility model reduces the construction cost, controls the deformation of the pipeline, protects the high-pressure pipe in place at one time, does not need to carry out traffic guidance and modification, has flexible application conditions, stronger adaptability and generalization, can meet the strict requirement on the protection of the existing power pipe, and has higher economic benefit and social benefit.
Description
Technical Field
The utility model belongs to the technical field of geotechnical engineering, and particularly relates to a U-shaped combined structure for in-situ protection of a high-voltage cable pipe.
Background
During excavation of the subway foundation pit, pipelines are usually distributed to cross the foundation pit and are usually moved and changed or protected in situ. The high-voltage cable pipe is generally incapable of being moved and changed as a main power supply cable in a city, and needs to be protected in situ, when the high-voltage cable is protected in situ, the complicated surrounding environment often causes overlarge displacement and deformation of a cable pipe ditch, safety accidents are easy to happen, the safety is low, and great social influence is caused by power failure due to improper measures.
At present, the in-situ protection of a high-voltage cable pipe generally adopts a temporary steel support bottom, and the high-voltage cable pipe is detached after temporary protection, and because the high-voltage cable pipe is very sensitive to environmental deformation, the high-voltage cable pipe often causes secondary influence on a high-voltage cable structure in the detaching stage, and the fragile structure of the cable is greatly influenced. In addition, when aiming at some station foundation pits, such as shallow top plate soil covering and even zero soil covering, the cable trough needs to be considered as a part of the structural section, at the moment, the conventional in-situ protection method cannot meet the requirements of field construction, the new method needs to consider the protection of the cable pipe and directly form a complete permanent structural system at one time, and secondary influence caused by dismantling protection measures is avoided.
Disclosure of Invention
The utility model provides an in-situ protection method for a high-voltage cable pipe with a U-shaped structure according to the defects of the prior art, which utilizes the bottom supporting section steel and the concrete plate to form a combined structure system, strictly controls the deformation of a pipeline, protects the high-voltage pipe in place in a one-time reverse operation mode, does not need to be dismantled for the second time, thereby avoiding the disturbance to the high-voltage pipe, does not need to carry out traffic guide improvement, and has flexible application conditions. The node of the end part of the enclosure support adopts MJS high-pressure jet grouting, the pile core on the plane can avoid high-pressure cable pipes, effective occlusion between pile bodies can still be ensured, and a composite stress system is formed by inserting an anchor rod into the pile side, so that the reinforcement requirement of the strength required by the pipeline in-situ protection end pivot is met, and the requirements of soil retaining and water stopping during reverse construction are also met. The method has strong adaptability and popularization, can meet the strict requirement on the protection of the existing power pipe, and has high economic benefit and social benefit.
The technical scheme adopted by the utility model is as follows:
a U-shaped combined structure for in-situ protection of a high-voltage cable pipe comprises a combined bottom plate, a laminated slab and a hanging side plate, wherein the combined bottom plate is formed by supporting bottom section steel and poured reinforced concrete; the suspension side plates are arranged between the combined bottom plate and the supporting beam.
The protection structure further comprises a reinforcing end pivot of the station enclosure structure in the interrupt area, wherein the reinforcing end pivot comprises MJS piles, inserted anchor rods and row piles, and a composite wall system is formed together.
And reinforced concrete structural slabs are arranged between the bottom supporting section steels, and the bottom supporting section steels and the reinforced concrete structural slabs are connected in a full-distributed manner by adopting reinforcing steel bars.
And the support beam is provided with a permanent concrete cover plate for realizing rigid connection or disconnection of the combined structure.
The utility model has the following advantages:
the steel, the anchor rod, the section steel, the welding equipment, the sprayed concrete and the like are all conventional materials or equipment, and the corresponding sizes of the conventional materials or equipment are conventional types in engineering, so that the conventional materials or equipment are convenient to process, manufacture and purchase; the MJS reinforces the equipment drilling pile core on the plane, can avoid high-voltage cable pipes, can still ensure effective occlusion between pile bodies, and the construction is not blocked by a power pipe ditch; the earth-retaining structure adopts a reverse-operation mode of an anchor-spraying inverted-hanging method, so that the convenience of excavation can be met, the earth-retaining and water-stopping requirements can also be met, the enclosure reinforcing form can be used for selecting row piles or mixing piles according to geological conditions, the advantages are very obvious, and the operability is very strong; the U-shaped combined structure is combined with the bottom supporting section steel to bear force, so that the whole cable pipe trench is sealed and restrained, and the vertical and lateral deformation of the cable pipe trench in the construction stage and the permanent use stage can be effectively controlled. At present, the in-situ protection of a high-voltage cable pipe generally adopts a profile steel support bottom, and the profile steel support bottom is removed after temporary protection, so that the safety of the cable pipe structure is influenced, and for some station foundation pits, such as shallow top plate soil or even zero soil covering, the conventional in-situ protection method cannot meet the requirements of field construction, and the new method needs to consider the protection of the cable pipe and directly form a complete permanent structure system at one time. The U-shaped combined structure has a permanent and temporary combined structure, is applied once, and avoids the influence of secondary disassembly on the electric power pipe ditch.
The utility model discloses a control the electric power trench and warp, improved the structural safety degree, the application condition is nimble, possesses stronger adaptability and generalizability, can also satisfy the harsh requirement to existing structural protection, consequently, the utility model has higher economic benefits and social, has extensive application prospect in urban rail transit trade.
Drawings
FIG. 1 is a cross-sectional view of a U-shaped combination structure.
FIG. 2 is a cross-sectional view of a step structure of the U-shaped assembly structure.
FIG. 3 is a cross-sectional view of a step two structure of the U-shaped combination structure.
FIG. 4 is a cross-sectional view of a U-shaped composite structure with three steps.
FIG. 5 is a cross-sectional view of the structure of the step four of the U-shaped combination structure.
FIG. 6 is a plan view of the bottom-supported steel section.
Fig. 7 is a schematic view of a reinforcing end pivot of a station enclosure structure in an interruption zone.
Fig. 8 is a structure diagram of the reinforcing mesh and anchor rod at the reinforcing end pivot of the interruption zone.
The labels in the figure are: 1-high-voltage cable pipe, 2-bottom supporting section steel, 3-counter-force section steel, 4-jack, 5-pull rod, 6-suspension side plate, 7-supporting beam, 8-concrete cover plate, 9-combined bottom plate, 10-laminated slab, 11-undisturbed soil, 12-station diaphragm wall enclosure, 13-MJS pile, 14-anchor rod and 15-row pile.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
Referring to fig. 1, the utility model relates to a U-shaped combined structure for in-situ protection of a high-voltage cable pipe, which comprises a combined bottom plate 9 formed by backing profile steel 2 and poured reinforced concrete, a laminated slab 10 and a hanging side plate 6, wherein the backing profile steel is compacted on a contact surface through reaction profile steel 3 and a jack 4, and the high-voltage cable pipe 1 is fixed through the laminated slab 10. The suspension side plate 6 is arranged between the combined bottom plate 9 and the support beam 7, the combined bottom plate 9 is connected with the suspension side plate 6 through a suspension rib, and the combined bottom plate 9 and the suspension side plate 6 form a U-shaped combined structure together;
the support beam 7 is provided with a permanent concrete cover plate 8 for recovering the traffic on the ground, and the cover plate 8 and the U-shaped combined structure can be just connected or disconnected.
Referring to fig. 6, the bottom supporting section steel 2 is firmly attached to the bottom plate of the high-voltage cable pipe 1, a reinforced concrete structural slab is arranged between the bottom supporting section steel 2, the bottom supporting section steel 2 is connected with concrete in a full-distributed mode through reinforcing steel bars, the bottom supporting section steel 2 and the reinforced concrete structural slab jointly form a combined bottom plate 9, a laminated slab 10 is arranged on the combined bottom plate, and the supporting beam 7 is connected with a ground connection wall enclosure structure 12 to form a stable system.
Referring to fig. 7, the structure comprises a reinforcing end pivot of the station enclosure structure in the interruption area, wherein the reinforcing end pivot comprises an MJS pile 13, an insertion anchor rod 14 and a row pile 15, and a composite wall system is formed together.
The station diaphragm wall enclosure structure 12 forms an interruption area near an in-situ protection pipeline, an enclosure reinforcing area is arranged outside the interruption area, the width of the reinforcing area is larger than that of the interruption area, and different reinforcing methods such as rigid row piles 15 or flexible stirring piles are adopted in the reinforcing area according to geological conditions to form a structure for reinforcing soil retaining and water stopping.
The bottom of an electric power pipe in an interruption area at the end part of a station is reinforced by MJS piles 13, the MJS piles 13 have strong engagement capacity and flexible construction conditions, a reinforcing end pivot can be effectively formed, and a reinforced row pile supporting structure 15 is constructed on the outer side of a station enclosure structure in the interruption area;
referring to fig. 8, the end pivot of the interruption area adopts an anchor-spraying inverted hanging method to stabilize the side wall, and after inserting the fixed anchor rod 14, the reverse method enclosure wall construction and soil excavation are carried out.
The utility model relates to a specific construction method of a U-shaped combined structure for in-situ protection of a high-voltage cable pipe, which comprises the following steps:
the method comprises the following steps: referring to fig. 2, excavating earth below a power pipeline to an elevation at the bottom surface of a power pipe trench, reserving earth below a bottom plate of the power pipe trench, wherein an excavation map earth inclined plane needs to keep a distance of 2m from a pipe trench top plate, and the excavation inclined plane angle does not exceed 45 degrees;
step two: referring to fig. 3, earthwork below the bottom plate of the power pipe trench is excavated out and the cushion layer of the bottom plate of the pipe trench is broken in every 2m in the longitudinal direction, 25b section steel is constructed and inserted, the section steel exceeds the left side and the right side of the pipe trench by 0.5m respectively, and the cutting height meets the requirements of section steel insertion and section steel protection layers;
step three: referring to fig. 4, in order to ensure that the contact between the bottom plate of the power pipe trench and the surface of the section steel is good, a group of section steels symmetrical to the section steel of the bottom plate are arranged at the upper part of the power pipe gallery, the two section steels are connected by adopting a pull rod, a gasket and a nut are arranged at the joint of the section steel and the pull rod, and then pre-pressure is applied by a jack to tightly push the contact surface between the section steel of the bottom plate and the bottom plate of the power pipe trench;
step four: referring to fig. 5, binding reinforcing steel bars of a supporting beam, pouring the supporting beam, and reserving reinforcing steel bars and embedded parts connected with side plates at the later stage of the supporting beam;
step five: fully laying a layer of plate steel bars on the lower side of the bottom supporting section steel, welding the plate steel bars with the section steel when fully laying the plate steel bars, and arranging two phi 12 reinforcing ribs at the joint of the section steel and the side plate;
step six: binding reinforcing steel bars in the side plate area, pouring concrete at the bottom plate and the side plates simultaneously after erecting the mold, connecting the side plates and the supporting beams through reserved reinforcing steel bars and embedded parts, and forming a combined structure by the bottom plate profile steel and the side plates together;
step six: when the combined structure is poured, the upper side is covered with a layer of laminated plate structure in time, a reusable embedded grouting steel pipe is embedded at the upper part of the laminated plate structure, and micro-expansion cement slurry is injected inside the laminated plate structure, so that the interface between the combined bottom plate and new and old concrete of the high-voltage cable pipe is ensured to be compact, an enough protective layer is provided, and the combined structure is prevented from cracking;
step seven: applying MJS to the enclosure interruption area to reinforce the high-pressure jet grouting pile body;
step eight: performing reinforced row pile construction in an enclosure interruption area, and performing flexible reinforcement by adopting stirring or rotary spraying and the like according to geological conditions;
step nine: the soil body support at the lower part of the interruption area adopts an anchor-spraying inverted hanging method to excavate the soil body under the power pipeline, an anchor rod is inserted into the MJS reinforcement body while excavating, the length of the anchor rod needs to exceed the length of the MJS pile by more than 1m, and cement paste is injected to be filled,
step ten: and after the U-shaped combined structure and the end pivot are initially set, sequentially reversing the construction enclosure and the internal structure.
Above structure has the shaped steel concrete protective layer not enough at the in-process of pouring, and creep shrinkage produces the fracture phenomenon in its concrete setting hardening process, and the upside is noticed to cover one deck coincide plate structure when pouring integrated configuration, and the pre-buried slip casting steel pipe of pre-buried repeatedly usable of portion above that, inside pressure notes micro-expansion grout, ensures that combination bottom plate and high-voltage cable pipe new and old concrete interface are closely knit, provides enough protective layer, avoids the integrated configuration fracture.
The utility model controls the compactness of the section steel joint surface and forms a U-shaped protection structure at one time, and well supports and reinforces the end pivot of the station enclosure interruption area.
In the utility model, the bottom supporting section steel and the concrete slab form a combined structure system, the deformation of the pipeline is strictly controlled, the high-pressure pipe is protected in place at one time, and secondary dismantling is not needed, so that the disturbance to the high-pressure pipe is avoided, traffic guidance and modification are not needed, and the application conditions are flexible. The node of the end part of the enclosure support adopts MJS high-pressure jet grouting, the pile core on the plane can avoid high-pressure cable pipes, effective occlusion between pile bodies can still be ensured, and a composite stress system is formed by inserting an anchor rod into the pile side, so that the reinforcement requirement of the strength required by the pipeline in-situ protection end pivot is met, and the requirements of soil retaining and water stopping during reverse construction are also met. The steel, the cement paste, the steel support, the welding equipment, the grouting pipe and the like are all conventional materials or equipment, and the corresponding sizes of the steel, the cement paste, the steel support, the welding equipment, the grouting pipe and the like are conventional types in engineering, so that the steel, the cement paste, the steel support, the welding equipment, the grouting pipe and the like are convenient to process, manufacture and purchase. According to the utility model, the pipe ditch side plate is connected with the concrete support of the foundation pit, and the continuous enclosing structures on two sides of the concrete support structure are connected, so that the structural system has high rigidity and good control effect on controlling the deformation of the pipe ditch, and necessary construction space is provided for foundation pit excavation and underground structure back construction. In addition, utilize this utility model achievement, under different station structural current situations and geological conditions, do according to the bearing capacity and the stability of the existing structure in the place ahead, on-the-spot geological conditions dynamic adjustment end fulcrum structural support form, the reverse order and the scope of doing of adjustment structure carry out interim restraint control according to deformation monitoring data, carry out dynamic optimization at any time, possess very strong operability.
The method has strong adaptability and popularization, can meet the strict requirement on the protection of the existing power pipe, has high economic benefit and social benefit, and has wide application prospect in the urban rail transit industry.
The utility model is not limited to the examples, and any equivalent changes to the technical solution of the utility model by a person skilled in the art after reading the description of the utility model are covered by the claims of the utility model.
Claims (4)
1. The utility model provides a U-shaped integrated configuration of high-voltage cable pipe normal position protection which characterized in that:
the combined structure comprises a combined bottom plate (9) formed by the bottom supporting section steel (2) and poured reinforced concrete, a laminated slab (10) and a hanging side plate (6), the combined bottom plate (9) and the hanging side plate (6) are connected through hanging ribs to form a U-shaped combined structure, the laminated slab (10) is arranged on the combined bottom plate (9) and used for fixing the high-voltage cable pipe (1), and the bottom supporting section steel (2) is compacted on a contact surface through the reaction section steel (3) and the jack (4); the suspension side plates (6) are arranged between the combined bottom plate (9) and the supporting beam (7).
2. The U-shaped composite structure for in-situ protection of high-voltage cable tubes according to claim 1, wherein:
the combined structure further comprises a reinforcing end pivot of the stop area station enclosure structure, wherein the reinforcing end pivot comprises MJS piles (13), insertion anchor rods (14) and row piles (15), and a composite wall system is formed together.
3. The U-shaped combination structure for in-situ protection of high-voltage cable tubes according to claim 2, wherein:
and reinforced concrete structural slabs are arranged between the bottom supporting section steels (2), and the bottom supporting section steels (2) are connected with the reinforced concrete structural slabs in a full-distributed manner by adopting reinforcing steel bars.
4. The U-shaped combination structure for in-situ protection of high-voltage cable tubes according to claim 3, wherein:
and a permanent concrete cover plate (8) is arranged on the support beam (7) and is used for realizing rigid connection or disconnection of the combined structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220309946.6U CN216765900U (en) | 2022-02-16 | 2022-02-16 | U-shaped combined structure for in-situ protection of high-voltage cable pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220309946.6U CN216765900U (en) | 2022-02-16 | 2022-02-16 | U-shaped combined structure for in-situ protection of high-voltage cable pipe |
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| Publication Number | Publication Date |
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| CN216765900U true CN216765900U (en) | 2022-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220309946.6U Active CN216765900U (en) | 2022-02-16 | 2022-02-16 | U-shaped combined structure for in-situ protection of high-voltage cable pipe |
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| Country | Link |
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| CN (1) | CN216765900U (en) |
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- 2022-02-16 CN CN202220309946.6U patent/CN216765900U/en active Active
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