CN115929399B - Construction protection device and construction protection method for electric power tunnel - Google Patents
Construction protection device and construction protection method for electric power tunnel Download PDFInfo
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- CN115929399B CN115929399B CN202310097065.1A CN202310097065A CN115929399B CN 115929399 B CN115929399 B CN 115929399B CN 202310097065 A CN202310097065 A CN 202310097065A CN 115929399 B CN115929399 B CN 115929399B
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- 239000004567 concrete Substances 0.000 description 9
- 239000000725 suspension Substances 0.000 description 7
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- 238000010586 diagram Methods 0.000 description 3
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- 238000012423 maintenance Methods 0.000 description 2
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- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000011378 shotcrete Substances 0.000 description 2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to the technical field of subway station construction, in particular to a construction protection device and a construction protection method for an electric power tunnel.
Description
Technical Field
The invention relates to the technical field of subway station construction, in particular to a construction protection device and a construction protection method for an electric power tunnel.
Background
A power tunnel refers to a corridor or tunnel structure for accommodating a large number of cables laid on cable supports. Besides the tunnel, the electric tunnel can better protect the cable, and people can check and maintain the cable conveniently. The adoption of the electric power tunnel can not only avoid the restriction of the overhead line on the growth height of the greening trees, but also adjust the conveying capacity according to actual needs, increase the number of cables, and is not easily affected by climate change, so that the power supply reliability is higher.
Along with the acceleration of the urban process, the scale of urban rail transit development is also continuously expanding, and stations of the urban rail transit are mostly built at the road intersections, adjacent main roads or the middle positions of the main roads so as to realize the optimal use function of subway stations. The construction of the subway station is affected by various surrounding engineering environments, particularly the electric tunnel, when the electric tunnel passes through the subway station under construction, the electric tunnel is changed in order to avoid damage to the electric tunnel in the construction process, but when the electric tunnel is a high-voltage electric tunnel, the electric effect of changing the high-voltage electric tunnel to the city is extremely large, the difficulty of changing the electric tunnel is large, the cost is high and the risk is high because the high-voltage electric tunnel has the characteristics of large size and heavy weight.
Therefore, the problem of construction under the condition that the high-voltage power tunnel cannot be changed is needed to be solved, namely, the power tunnel is protected in the construction process, so that the purposes of not affecting normal construction operation and guaranteeing that the power tunnel is not damaged are achieved.
Disclosure of Invention
The invention aims at: aiming at the problem that the electric power tunnel cannot be changed by moving through the subway station in the background technology, the construction protection device and the construction protection method for the electric power tunnel are provided, the electric power tunnel is protected under the condition that the electric power tunnel cannot be changed by moving, and the subway station construction is facilitated from the side.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a construction protection device for electric power tunnel, includes longeron, first crossbeam, second crossbeam and guan liang, longeron parallel arrangement is in electric power tunnel top, the longeron both ends are connected respectively on the guan liang, the longeron top is connected with first crossbeam, first crossbeam is followed electric power tunnel transversely sets up, the longeron below is provided with the second crossbeam, first crossbeam with the second crossbeam passes through the hoist cable and is connected, the second crossbeam supports electric power tunnel.
The invention relates to a construction protection device for an electric tunnel, which is characterized in that a longitudinal beam is arranged on a crown beam of a subway station, and the longitudinal beam is supported by the crown beam; a first cross beam is arranged at the top of the longitudinal beam, and the longitudinal beam is used for supporting the first cross beam; set up the second crossbeam in longeron below, link together second crossbeam and first crossbeam through the hoist cable, first crossbeam utilizes the hoist cable to apply ascending pulling force for the second crossbeam, thereby connect the second crossbeam on the longeron, the rethread second crossbeam supports the electric power tunnel, make the electric power tunnel hang in longeron below through the second crossbeam, and then realize supporting and protecting the electric power tunnel, avoid causing the damage to the electric power tunnel when subway station construction, also be convenient for simultaneously operate in electric power tunnel below region, and then realize that the electric power tunnel protects the electric power tunnel under the condition that can't move to improve, thereby be convenient for subway station construction.
Preferably, the second cross beam is arranged below the power tunnel, two ends of the second cross beam extend out of the power tunnel, and the sling is arranged outside the power tunnel. The second cross beam is arranged below the electric power tunnel so as to be convenient for suspending the second cross beam to support the electric power tunnel, and two ends of the second cross beam extend out of the electric power tunnel so as to be convenient for suspending through the end parts of the second cross beam.
Preferably, at least four longitudinal beams are arranged on the crown beam in parallel, the longitudinal beams are connected through the first cross beam, and the bearing capacity is enhanced through the arrangement of a plurality of longitudinal beams.
Preferably, along the longitudinal beam length direction, adjacent first crossbeam interval sets up, the second crossbeam is according to first crossbeam position corresponds the setting, first crossbeam with set up two at least between the second crossbeam the hoist cable, the both ends of second crossbeam all are connected with the hoist cable.
Preferably, the sling further comprises a mating nut by which the sling is secured to the first cross member.
Preferably, the structure further comprises a lattice column, wherein the lattice column is arranged at the bottom of the longitudinal beam, and the lattice column supports the longitudinal beam.
Preferably, a first support beam is connected between the lattice column and the longitudinal beam, the bottom of the first support beam is connected with the lattice column, and the top of the first support beam is abutted with the longitudinal beam.
Preferably, a second support beam is further connected to the lattice column, and the second support beam abuts against the bottom of the electric power tunnel.
Preferably, the electric power tunnel further comprises a steel pipe pile for supporting the electric power tunnel bottom.
The application also discloses a construction protection method for the electric power tunnel, which comprises the following steps of using the construction protection device for the electric power tunnel:
step S1: rechecking the plane position and the burial depth of the electric power tunnel, excavating soil around the electric power tunnel, constructing the construction protection device, enabling the second cross beam to suspend the electric power tunnel, arranging a steel pipe pile at the bottom of the electric power tunnel, and supporting the bottom of the electric power tunnel by the steel pipe pile;
step S2: constructing a station structure below the electric power tunnel, dismantling the steel pipe pile, and arranging a temporary pipe pile on a top plate of the station structure, wherein the temporary pipe pile is in supporting connection with the electric power tunnel;
step S3: backfilling the lower part of the electric power tunnel in sections after the station structure construction is completed, and removing the temporary tubular piles;
step S4: and removing the rest part outside the crown beam in the construction protection device, and backfilling soil around the electric power tunnel to the designed elevation.
According to the construction protection method for the electric power tunnel, the electric power tunnel is protected in the construction process by arranging the construction protection device for the electric power tunnel, so that the construction of the structure below the electric power tunnel is completed without changing the electric power tunnel, the construction efficiency of a subway station is greatly improved, and meanwhile, the construction period and the construction cost are saved.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention relates to a construction protection device for an electric tunnel, which is characterized in that a longitudinal beam is arranged on a crown beam of a subway station, and the longitudinal beam is supported by the crown beam; a first cross beam is arranged at the top of the longitudinal beam, and the longitudinal beam is used for supporting the first cross beam; set up the second crossbeam in longeron below, link together second crossbeam and first crossbeam through the hoist cable, first crossbeam utilizes the hoist cable to apply ascending pulling force for the second crossbeam, thereby connect the second crossbeam on the longeron, the rethread second crossbeam supports the electric power tunnel, make the electric power tunnel hang in longeron below through the second crossbeam, and then realize supporting and protecting the electric power tunnel, avoid causing the damage to the electric power tunnel when subway station construction, also be convenient for simultaneously operate in electric power tunnel below region, and then realize that the electric power tunnel protects the electric power tunnel under the condition that can't move to improve, thereby be convenient for subway station construction.
2. According to the construction protection method for the electric power tunnel, the electric power tunnel is protected in the construction process by arranging the construction protection device for the electric power tunnel, so that the construction of the structure below the electric power tunnel is completed without changing the electric power tunnel, the construction efficiency of a subway station is greatly improved, and meanwhile, the construction period and the construction cost are saved.
Description of the drawings:
fig. 1 is a schematic structural view of the power tunnel construction protection device of the present invention.
Fig. 2 is a view in the a direction of fig. 1.
Fig. 3 is a partial enlarged view at B of fig. 2.
Fig. 4 is a top view of fig. 2.
Fig. 5 is a schematic view of the construction protection device of the present invention installed at a station.
Fig. 6 is a cross-sectional view at C-C of fig. 5.
Fig. 7 is a schematic representation of soil excavation around a power tunnel.
Fig. 8 is a schematic view of the stringers installed in a station position.
Fig. 9 is a schematic diagram of a suspended power tunnel.
Fig. 10 is a side view of fig. 9.
Fig. 11 is a schematic diagram of a suspended power tunnel two.
Fig. 12 is a schematic view of temporary tubular pile installation.
Fig. 13 is a side view of fig. 12.
FIG. 14 is a schematic view of a segmented backfill under a power tunnel
Fig. 15 is a schematic diagram of power tunnel backfill one.
Fig. 16 is a schematic view of a primary support of a power tunnel.
Fig. 17 is a second power tunnel backfill schematic.
The marks in the figure: the system comprises a first longitudinal beam, a second longitudinal beam, a first transverse beam, a second transverse beam, a 4-sling, a 41-matched nut, a 42-connecting plate, a 5-electric tunnel, a 51-primary support device, a 6-lattice column, a 7-first support beam, an 8-crown beam, a 9-second support beam, a 10-steel pipe pile, a 11-temporary pipe pile and a 12-station structure.
Detailed Description
The present invention will be described in further detail with reference to examples and embodiments. It should not be construed that the scope of the above subject matter of the present invention is limited to the following embodiments, and all techniques realized based on the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1-2, the construction protection device for the electric power tunnel according to the embodiment includes a longitudinal beam 1, a first cross beam 2, a second cross beam 3 and a crown beam 8, wherein the longitudinal beam 1 is arranged above the electric power tunnel 5 in parallel, two ends of the longitudinal beam 1 are respectively arranged on the crown beam 8, the first cross beam 2 is arranged at the top of the longitudinal beam 1, the second cross beam 3 is arranged below the longitudinal beam 1, the first cross beam 2 is connected with the second cross beam 3 through a sling 4, and the second cross beam 3 supports the electric power tunnel 5.
The invention relates to a construction protection device for an electric tunnel, wherein a longitudinal beam 1 is arranged on a crown beam 8 of a subway station, and the longitudinal beam 1 is supported by the crown beam 8; a first cross beam 2 is arranged at the top of the longitudinal beam 1, and the first cross beam 2 is supported by the longitudinal beam 1; set up the second crossbeam 3 in longeron 1 below, link together second crossbeam 3 and first crossbeam 2 through hoist cable 4, first crossbeam 2 utilizes hoist cable 4 to apply ascending pulling force for second crossbeam 3, thereby connect second crossbeam 3 on longeron 1, rethread second crossbeam 3 supports electric power tunnel 5, make electric power tunnel 5 hang in longeron 1 below through second crossbeam 3, and then realize supporting and protecting electric power tunnel 5, avoid causing the damage to electric power tunnel 5 when subway station construction, also be convenient for simultaneously operate in electric power tunnel 5 below region, and then realize electric power tunnel 5 and protect electric power tunnel 5 under the condition that can't move to change, thereby the subsequent construction operation of subway station of being convenient for.
As shown in fig. 1, the second cross beam 3 is disposed below the electric power tunnel 5, and the top of the second cross beam 3 is abutted against the bottom of the electric power tunnel 5, so that the second cross beam 3 supports the electric power tunnel 5, further, two ends of the second cross beam 3 extend out of the bottom of the circuit tunnel 5, the sling 4 is located outside the electric power tunnel 5, the end of the second cross beam 3 is connected with the sling 4 conveniently, and interference with the electric power tunnel 5 is avoided.
As shown in fig. 4, at least four stringers 1 are arranged on a station crown beam 8 in parallel, a plurality of stringers 1 are connected through a first cross beam 2, so that the stringers 1 are firmer, a power tunnel 5 is suspended by arranging a plurality of stringers 1, and the power tunnel 5 is more stable when suspended, wherein the stringers 1 are formed by bailey beams which are assembled by bailey sheet beams and are assembled into a bailey beam by two bailey Lei Pianliang through bolts, and a plurality of bailey sheet scissors are connected between the two bailey sheet beams.
Preferably, as shown in fig. 2, adjacent first cross beams 2 are arranged on the longitudinal beam 1 at intervals along the length direction of the longitudinal beam 1, and the second cross beams 3 are correspondingly arranged according to the positions of the first cross beams 2, further, the first cross beams 2 are made of I-steel, and in order to increase the strength of the first cross beams 2, a double-spliced I-steel structure is adopted; the second cross beam 3 is made of I-steel, and a double-spliced I-steel structure is adopted for increasing the strength of the second cross beam 3.
As shown in fig. 1, the first beam 2 is connected with the second beam 3 through at least two slings 4, and two ends of the second beam 3 are connected with slings 4, so that the stress of the second beam 3 is more uniform.
As shown in fig. 3, the first distribution beam 2 is provided with a connecting plate 42, the connecting plate 42 is tightly attached to the first distribution beam 2, a hole is formed in the connecting plate 42, the sling 4 passes through the hole and is screwed by a matched nut 41, so that the sling 4 is fixed on the first cross beam 2, when the electric power tunnel 5 is suspended, the length of the sling 4 at each suspension point needs to be adjusted because of large difference between the downwarping value of the longitudinal beam 1 and the downwarping value of the sling 4, the sling 4 at each suspension point is adjusted, the length of the sling 4 at each suspension point is adjusted by rotating the matched nut 41 at each suspension point so as to meet the suspension requirement, the elevation of the bottom surface of the electric power tunnel 5 is kept consistent, the electric power tunnel 5 can be uniformly stressed, further, the matched nut 41 adopts double nuts, one nut is used for adjusting the length of the sling 4, the other nut is used for fixing the sling 4, the sling 4 is made of finish-rolled screw steel, the connecting plate 42 is made of steel plate, and the second distribution beam 3 and the sling 4 are connected in the same manner as the first distribution beam 2 and the sling 4.
Preferably, as shown in fig. 5 to 6, the electric power tunnel construction protection device further comprises lattice columns 6, when the clear span of the longitudinal beam 1 is larger, a plurality of lattice columns 6 are arranged at the middle part of the longitudinal beam 1, the lattice columns 6 are positioned at the lower part of the longitudinal beam 1, the longitudinal beam 1 is supported by arranging the lattice columns 6 at the middle part of the longitudinal beam 1, and further the bending resistance of the longitudinal beam 1 under the condition that the clear span is larger is enhanced, so that the stability of the electric power tunnel construction protection device is ensured, meanwhile, the bearing capacity of the longitudinal beam 1 is enhanced due to the fact that the lattice columns 6 are additionally arranged at the middle part of the longitudinal beam 1, and further the electric power tunnel construction protection device can suspend the electric power tunnel 5 better, wherein L-shaped steel is adopted among the lattice columns 6 as a scissor support, the lattice columns 6 form a whole, further, a first supporting beam 7 is arranged at the top of the lattice columns 6, the longitudinal beam 1 is supported by the first supporting beam 7, the bottom of the first supporting beam 7 is connected at the end part of the first supporting beam 7, and the top of the first supporting beam 7 is in contact with the top of the longitudinal beam 1, so that the top of the longitudinal beam 1 is supported by the supporting the top of the longitudinal beam 1.
Preferably, as shown in fig. 5-6, a second support beam 9 is further connected to the lattice column 6, the second support beam 9 is installed in the middle of the lattice column 6, and the top of the second support beam 9 abuts against the bottom of the power tunnel 5, so that the lattice column 6 supports the power tunnel 5.
Preferably, as shown in fig. 9-11, the electric power tunnel construction protection device further comprises a steel pipe pile 10, the steel pipe pile 10 is arranged at the lower part of the electric power tunnel 5, and the top of the steel pipe pile 10 is abutted to the bottom of the electric power tunnel 5, so that the steel pipe pile 10 supports the electric power tunnel 5 and shares part of the gravity of the electric power tunnel 5, the bearing capacity of the electric power tunnel 5 when the electric power tunnel construction protection device is suspended in the embodiment is reduced, and further, when the electric power tunnel construction protection device is gradually installed, the steel pipe pile 10 is gradually installed at the same time, and the installation process of the electric power tunnel construction protection device is safer and more reliable through the supporting function of the steel pipe pile 10.
Wherein, every 4m of steel-pipe pile 10 is a set of, and every group comprises two steel-pipe piles 10 to place the horizontal support that comprises two I-steel of piecing together at steel-pipe pile 10 top, after the steel-pipe pile 10 is installed, keep the suspension state of hoist cable 4, link together with two steel-pipe piles 10 of group each other, increase the overall stability of supporting, steel-pipe pile 10 bottom stands in the station bottom, pours 0.3m thick C30 basis, and the foundation top surface flushes with bottom structure bed course top surface.
In the present specification, the longitudinal direction is a direction along the length of the power tunnel 5, and the lateral direction is a direction perpendicular to the length direction of the power tunnel 5.
Example 2
As shown in fig. 7 to 17, a construction protection method for a power tunnel includes using a construction protection device for a power tunnel as described in embodiment 1, further including the steps of:
step S1: excavating soil around the electric power tunnel 5, and constructing a construction protection device to enable the second cross beam 3 to suspend the electric power tunnel 5, arranging a steel pipe pile 10 at the bottom of the electric power tunnel 5, wherein the steel pipe pile 10 supports the bottom of the electric power tunnel 5;
the construction method comprises the steps of firstly, carrying out construction of a guard pile by soil excavation around an electric power tunnel 5, adopting manual hole digging piles to dig before the construction of the guard pile, determining the outline and the burial depth of the electric power tunnel 5 at the guard pile, then constructing the guard piles at the two sides of the electric power tunnel 5, and not constructing the guard pile at the electric power tunnel 5, subsequently adopting reinforcing measures, and after the construction of the guard pile is completed, constructing a dewatering well, and constructing a crown beam 8, a concrete support, a lattice column 6 and the like;
as shown in fig. 7, after the crown beam 8 and the supporting beam reach the designed strength, the surrounding part of the electric power tunnel 5 is locally excavated, the electric power tunnel 5 is under the bottom of the crown beam 8 due to the influence of the electric power tunnel 5, the soil range between piles reaches about 4 m-6 m, the reinforced concrete wall is constructed by planting ribs between the fender piles at two sides, the sprayed concrete C30 is sprayed, the thickness is 0.4m, the sprayed concrete surface is leveled with the pile surface at the inner side of the foundation pit along with the excavation progress, and the manual cleaning excavation is changed along with the excavation to the top 50cm of the electric power tunnel 5.
Checking ponding condition in the electric power tunnel 5 before manual excavation, arranging corresponding drainage measures such as a water suction pump at the low-lying position of the inner ground, ensuring that the suspended electric power tunnel 5 is in a waterless state, manually excavating earthwork around the electric power tunnel 5, excavating the earthwork outside an affected area by adopting a manual cooperation excavator until the excavation is stopped when the upper part of the bottom of the electric power tunnel is 50 cm. And entrusting the professional appraisal organization to appraise the current quality of the power tunnel and giving an appraisal report. After the identification is finished, the primary support of the electric tunnel is manually broken, and a short drill bit with the length of less than 15cm is adopted for breaking, so that the secondary lining of the tunnel is prevented from being broken in a layered manner.
As shown in fig. 8, the longitudinal beam 1 is assembled on a flat field, lifted to a designated position according to a design drawing, and then the longitudinal beam 1 is butted and the support frame is assembled. Simultaneously, the first distribution beam 2 is erected on the longitudinal beam 1, and a U-shaped bolt locking measure is arranged at a connecting node of the first distribution beam 2 and the longitudinal beam 1 so as to ensure the lateral stability of the longitudinal beam 1.
As shown in fig. 9-11, the lower part of the electric power tunnel 5 is excavated by a slope, the electric power tunnel 5 is suspended step by step, and the first cross beam 2, the second cross beam 3 and the sling 4 are installed for suspension immediately after the lower part of the electric power tunnel 5 is hollowed, and one electric power tunnel is installed every 2 m; the construction of the steel pipe pile 10 is started after the lower part of the electric power tunnel 5 is excavated to the bottom of the station, the steel pipe pile 10 is a steel pipe with phi 609, the wall thickness is 8mm, two sides of the steel pipe pile are flush with two sides of the electric power tunnel 5, a steel plate with the thickness of 800 x 20mm is arranged below the steel pipe pile 10, 2 50t screw jacks are arranged on each side of the steel pipe pile 10, double-spliced I45I-steel transverse brackets with the width equal to that of the electric power tunnel 5 are arranged above the jacks, the jacks on the steel pipe pile 10 are uniformly stressed, the I-steel is closely attached to the electric power tunnel 5, the steel pipe pile 10 is timely erected along with the excavation progress, every 4m is one, and the lattice column 6 does not need to be arranged.
Step S2: as shown in fig. 12-13, constructing a station structure 12 below the electric power tunnel 5, dismantling the steel pipe pile 10, and arranging a temporary tubular pile 11 on a top plate of the station structure 12, wherein the temporary tubular pile 11 is in supporting connection with the electric power tunnel 5;
after the earth excavation below the electric power tunnel 5 is completed, the station structure 12 below the electric power tunnel 5 is constructed, 1000 x 1000mm holes are reserved in the positions of the steel pipe pile 10 and the lattice column 6 on the bottom plate and the top plate of the station structure 12 during construction, a reinforcing steel bar embedded connector is reserved at the position of a hole opening, after the construction of the bottom plate and the top plate is completed, when the maintenance strength reaches the requirement, the position of the steel pipe pile 10 below the electric power tunnel 5 is staggered on the top plate of the station structure 12, a temporary steel pile 11 is installed and used for replacing and removing the steel pipe pile 10 and the lattice column 6 below the electric power tunnel 5, 4 50t screw jacks and double-spliced I20I-steel are used for supporting the electric power tunnel 5 on the upper portion of the temporary pipe pile 11, and the steel pipe pile 10 is removed after the construction is completed.
The steel pipe pile 10 and the lattice column 6 are removed, the reserved hole is constructed, the waterproof board repaired at the bottom plate is reinforced, and the self-adhesive waterproof board can be adopted for reinforcement. And (3) chiseling out binding reinforced bars by the reserved connector, wherein the concrete adopts water-stopping micro-expansion concrete with the strength not lower than that of structural concrete, and casting is finished to complete maintenance work.
Step S3: backfilling the lower part of the electric power tunnel 5 in sections after the station structure 12 is constructed, and removing the temporary tubular piles 11;
as shown in fig. 14-15, the lower part of the electric power tunnel 5 is backfilled in sections, the backfilling length of each section is about 10 meters, the dismantling space of the temporary steel pile 11, the jack and the i-steel is reserved around the temporary steel pile 11 during each section backfilling, the rest part is filled, the temporary steel pile 11, the jack and the i-steel are dismantled after the filling, the reserved part is filled with C20 fine stone concrete after the dismantling is completed, the backfilling is carried out from two ends to the middle position, the lattice column 6 is removed when the backfilling is carried out to the position of the middle lattice column 6, the reserved top plate hole at the lattice column 6 is repaired, the backfilling is carried out by adopting layered sections, the filling thickness of each layer is not more than 50cm, the backfilling is carried out by using a frog ramming machine, the earthwork is backfilled to the lower part of the electric power tunnel 5, and the space between the electric power tunnel 5 and the backfilling surface is filled with C20 fine stone concrete, and the backfilling is ensured to be compact. Ensure that the compactness is not less than 93 percent.
Step S4: and removing the rest part outside the crown beam 8 in the construction protection device, and backfilling soil around the electric power tunnel 5 to the designed elevation.
As shown in fig. 16, the bottom concrete of the electric power tunnel 5 reaches the strength and the rest of the construction protection device outside the crown beam 8 is removed, and the primary support of the electric power tunnel 5 is restored, i.e., the primary support device 51 is arranged outside the electric power tunnel 5. The primary support device 51 of the electric tunnel 5 is made of 30 cm-thick C25 reinforced concrete, main reinforcements of the reinforced concrete are arranged in a phi 18@200 mode, and stirrups are arranged in a phi 10@400 quincuncial mode. The outer contour of the electric tunnel 5 is used as an inner film, an outer film is an 18mm thick wood template, and a bracket is supported by a plate buckle bracket. The slump of the concrete is strictly controlled, and the concrete is symmetrically poured in layers of not more than 50 cm. And (5) curing in time after pouring is finished, wherein the strength reaches 2MPa, and the template support is removed.
As shown in fig. 17, the primary support device 51 for recovering the power tunnel 5 is backfilled after reaching the strength. And the power tunnel 5 is backfilled manually in the top 2m and the left and right 3m of the power tunnel 5, and the power tunnel in the non-affected area is backfilled mechanically, so that the normal operation of the power tunnel in the backfilling process is ensured. And (4) reserving sleeve valve pipes at two sides of the electric tunnel during foundation pit backfilling, and reinforcing and grouting after backfilling is completed.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (5)
1. The construction protection device for the electric power tunnel is characterized by comprising a longitudinal beam (1) and a crown beam (8), wherein the longitudinal beam (1) is arranged above the electric power tunnel (5) in parallel, two ends of the longitudinal beam (1) are respectively connected to the crown beam (8), a first cross beam (2) is connected to the top of the longitudinal beam (1), the first cross beam (2) is transversely arranged along the electric power tunnel (5), a second cross beam (3) is arranged below the longitudinal beam (1), the first cross beam (2) is connected with the second cross beam (3) through a sling (4), and the second cross beam (3) supports the electric power tunnel (5);
the device further comprises a lattice column (6), wherein the lattice column (6) is arranged at the bottom of the longitudinal beam (1), and the longitudinal beam (1) is supported by the lattice column (6);
a first supporting beam (7) is connected between the lattice column (6) and the longitudinal beam (1), the bottom of the first supporting beam (7) is connected with the lattice column (6), and the top of the first supporting beam (7) is abutted against the longitudinal beam (1);
a second supporting beam (9) is further connected to the lattice column (6), and the second supporting beam (9) is abutted to the bottom of the electric power tunnel (5);
the electric power tunnel comprises a power supply pipe (5), and is characterized by further comprising a steel pipe pile (10), wherein the steel pipe pile (10) is supported at the bottom of the power tunnel (5);
the second cross beam (3) is arranged below the electric power tunnel (5), two ends of the second cross beam (3) extend out of the electric power tunnel (5), and the sling (4) is arranged outside the electric power tunnel (5).
2. Construction protection device for electric power tunnels according to claim 1, characterized in that at least four of said stringers (1) are arranged in parallel on said crown beam (8), said stringers (1) being connected by said first cross beam (2).
3. Construction protection device for electric power tunnel according to claim 1, characterized in that along the longitudinal beam (1) length direction, adjacent first crossbeam (2) interval sets up, second crossbeam (3) are according to first crossbeam (2) position correspondence sets up, first crossbeam (2) with set up two at least hoist cable (4) between second crossbeam (3), and the both ends of second crossbeam (3) all are connected with hoist cable (4).
4. A construction protection device for an electric tunnel according to claim 3, characterized in that the sling (4) further comprises a mating nut (41), by means of which mating nut (41) the sling (4) is fixed to the first cross member (2).
5. A construction protection method for an electric power tunnel, characterized by using a construction protection device for an electric power tunnel according to claim 1, further comprising the steps of:
step S1: rechecking the plane position and the burial depth of the electric power tunnel (5), excavating soil around the electric power tunnel (5), constructing the construction protection device, enabling the second cross beam (3) to suspend the electric power tunnel (5), arranging a steel pipe pile (10) at the bottom of the electric power tunnel (5), and supporting the bottom of the electric power tunnel (5) by the steel pipe pile (10);
step S2: constructing a station structure (12) below the electric power tunnel (5), dismantling the steel pipe pile (10), and arranging a temporary pipe pile (11) on a top plate of the station structure (12), wherein the temporary pipe pile (11) is in supporting connection with the electric power tunnel (5);
step S3: after the station structure (12) is constructed, backfilling the lower part of the electric power tunnel (5) in a segmented manner, and dismantling the temporary tubular pile (11);
step S4: and removing the rest parts except the crown beam (8) in the construction protection device, and backfilling soil around the electric power tunnel (5) to the designed elevation.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2140901A1 (en) * | 1971-08-16 | 1973-03-01 | Scharf Gmbh Maschf | SHOULDER AUXILIARY DEVICE FOR HANDLING AND SHIFTING POINTS IN UNDERGROUND MINING, IN PARTICULAR FOR MONORAR RAILWAYS |
| CN109723065A (en) * | 2019-02-26 | 2019-05-07 | 济南轨道交通集团有限公司 | Deep basal pit freezing partly reinforced construction method in bracing means and rich water sandy pear variety |
| CN211113778U (en) * | 2019-07-31 | 2020-07-28 | 广州地铁设计研究院股份有限公司 | Electric power tunnel protection architecture |
| CN112431632A (en) * | 2020-11-30 | 2021-03-02 | 北京元洋鑫胜电力工程有限公司 | Construction method of electric power tunnel |
| CN215721246U (en) * | 2021-08-19 | 2022-02-01 | 中铁八局集团电务工程有限公司 | Supporting structure for water supply pipeline |
| DE202022101267U1 (en) * | 2022-03-08 | 2022-03-15 | Municipal Environmental Protection Engineering Co., Ltd Of Crec Shanghai Group | In-situ suspension protection structure to span an ultra-wide and ultra-deep flowtube gallery on a station by a cover and excavation process |
| CN114753859A (en) * | 2022-05-07 | 2022-07-15 | 中铁十八局集团有限公司 | Covering and excavating construction method for existing building penetrating downwards |
| CN217462250U (en) * | 2021-08-20 | 2022-09-20 | 杭州市市政工程集团有限公司 | Tunnel foundation pit diversion construction structure penetrating through non-navigation river channel |
| CN115370171A (en) * | 2022-07-29 | 2022-11-22 | 天津天源国电电力技术有限公司 | Construction method for in-situ suspension protection of power pipeline |
| CN217951498U (en) * | 2022-07-14 | 2022-12-02 | 中国水利水电第十四工程局有限公司 | Subway station foundation pit pipeline suspends protection device in midair |
-
2023
- 2023-02-07 CN CN202310097065.1A patent/CN115929399B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2140901A1 (en) * | 1971-08-16 | 1973-03-01 | Scharf Gmbh Maschf | SHOULDER AUXILIARY DEVICE FOR HANDLING AND SHIFTING POINTS IN UNDERGROUND MINING, IN PARTICULAR FOR MONORAR RAILWAYS |
| CN109723065A (en) * | 2019-02-26 | 2019-05-07 | 济南轨道交通集团有限公司 | Deep basal pit freezing partly reinforced construction method in bracing means and rich water sandy pear variety |
| CN211113778U (en) * | 2019-07-31 | 2020-07-28 | 广州地铁设计研究院股份有限公司 | Electric power tunnel protection architecture |
| CN112431632A (en) * | 2020-11-30 | 2021-03-02 | 北京元洋鑫胜电力工程有限公司 | Construction method of electric power tunnel |
| CN215721246U (en) * | 2021-08-19 | 2022-02-01 | 中铁八局集团电务工程有限公司 | Supporting structure for water supply pipeline |
| CN217462250U (en) * | 2021-08-20 | 2022-09-20 | 杭州市市政工程集团有限公司 | Tunnel foundation pit diversion construction structure penetrating through non-navigation river channel |
| DE202022101267U1 (en) * | 2022-03-08 | 2022-03-15 | Municipal Environmental Protection Engineering Co., Ltd Of Crec Shanghai Group | In-situ suspension protection structure to span an ultra-wide and ultra-deep flowtube gallery on a station by a cover and excavation process |
| CN114753859A (en) * | 2022-05-07 | 2022-07-15 | 中铁十八局集团有限公司 | Covering and excavating construction method for existing building penetrating downwards |
| CN217951498U (en) * | 2022-07-14 | 2022-12-02 | 中国水利水电第十四工程局有限公司 | Subway station foundation pit pipeline suspends protection device in midair |
| CN115370171A (en) * | 2022-07-29 | 2022-11-22 | 天津天源国电电力技术有限公司 | Construction method for in-situ suspension protection of power pipeline |
Non-Patent Citations (1)
| Title |
|---|
| 地铁车站基坑开挖对在运电力隧道悬吊保护措施的设计;李春;冯玫;胡鑫;王松周;;大众用电(第09期);全文 * |
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| CN115929399A (en) | 2023-04-07 |
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