CN217974480U - Reinforced concrete plate type structure spanning large karst cave - Google Patents
Reinforced concrete plate type structure spanning large karst cave Download PDFInfo
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- CN217974480U CN217974480U CN202220825704.2U CN202220825704U CN217974480U CN 217974480 U CN217974480 U CN 217974480U CN 202220825704 U CN202220825704 U CN 202220825704U CN 217974480 U CN217974480 U CN 217974480U
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Abstract
The utility model discloses a stride across large-scale solution cavity's reinforced concrete plate structure at first excavates cutting to reinforced concrete slab bottom surface, finds out solution cavity distribution range, erects the water proof curtain in solution cavity both sides, squeezes the precast pile into solid ground layer certain degree of depth, lays reinforced concrete slab of being under construction behind the reinforced concrete precast pile to fill roadbed more than reinforced concrete slab. The utility model discloses a large-scale solution cavity of strideing across is handled to the engineering structure who comprises the reinforced concrete component, has avoided the processing of solution cavity bottom rivers, and reinforced concrete slab passes the solution cavity with the mode of strideing across to undertake the load of country rock. Compared with the traditional cave crossing method by adopting a backfilling method, the cave crossing method by adopting the reinforced concrete plate type structure has the advantages of reliable structure and convenient construction, avoids the defect of large sedimentation after construction caused by the backfill of the cave slag of the cave, has simple structure, clear stress and strong construction operability, and can shorten the construction period and improve the engineering safety.
Description
Technical Field
The utility model relates to a highway engineering construction field especially relates to a stride across reinforced concrete plate formula structure of large-scale solution cavity.
Background
At present, the most key point of karst cave treatment is to ensure the safety of the construction period and the operation period of a structure, and if the karst cave treatment is not carried out properly, foundation collapse and structure damage are probably caused, so that the safety of the road construction and the operation period can be ensured only by adopting an effective structure.
In the prior art, a pile foundation type is adopted to span a karst cave, when the bottom of the karst cave is deep and narrow, the filling is more, and the underground water moves frequently, the defects of diameter shrinkage, diameter expansion, mud clamping, segregation, pile breaking and the like of a pile body can occur in the construction process of hidden engineering, so that the defect of large sedimentation after construction is easily caused in the backfill process of the karst cave slag.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a stride across reinforced concrete plate structure of large-scale solution cavity, the adoption pile foundation type that aims at solving among the prior art stridees across the solution cavity, and when the solution cavity bottom is dark narrow and the filler is more, groundwater activity is frequent, probably can make the pile body appear undergauge, hole enlargement, press from both sides mud, segregation, disconnected stake scheduling defect in the hidden engineering work progress to at the solution cavity sediment backfill in-process, arouse the technical problem of the big defect of subsiding after the construction easily.
In order to achieve the purpose, the reinforced concrete plate type structure crossing a large karst cave is used for road construction with the large karst cave at the bottom, and comprises a reinforced concrete plate crossing the large karst cave;
the reinforced concrete slab is laid above the large karst cave, one side of the reinforced concrete slab, which is close to the large karst cave, is provided with a waterproof curtain, and one side of the reinforced concrete slab, which is close to the large karst cave, is provided with a reinforced concrete pile.
The waterproof curtain comprises a first curtain section and a second curtain section which are arranged on the reinforced concrete slab respectively, and the first curtain section and the second curtain section are located on two sides of the large karst cave respectively.
Wherein, reinforced concrete pile is the precast pile, is used for right reinforced concrete slab carries out single pile vertical support.
Wherein the reinforced concrete slab is provided with an arch plate bulge and a flat pavement, and the arch plate bulge is positioned on one side of the reinforced concrete slab close to the reinforced concrete pile; the flat pavement is positioned on one side of the reinforced concrete slab away from the arch bar bulge.
The reinforced concrete piles are multiple in number and are arranged in the transverse direction of the laying direction of the reinforced concrete slabs respectively.
The reinforced concrete piles are multiple in number and are arranged in the longitudinal direction of the laying direction of the reinforced concrete slabs respectively.
The utility model discloses a stride across large-scale solution cavity's reinforced concrete plate structure at first excavates cutting to reinforced concrete slab bottom surface, finds out solution cavity distribution range, erects the water proof curtain in solution cavity both sides, squeezes the precast pile into solid ground layer certain degree of depth, lays reinforced concrete slab of being under construction behind the reinforced concrete precast pile to fill roadbed more than reinforced concrete slab. The utility model discloses a large-scale solution cavity of strideing across is handled to the engineering structure who comprises the reinforced concrete component, has avoided the processing of solution cavity bottom rivers, and reinforced concrete slab passes the solution cavity with the mode of strideing across to undertake the load of country rock. Compared with the traditional cave crossing method by adopting a backfilling method, the cave crossing method by adopting the reinforced concrete plate type structure has the advantages of reliable structure and convenient construction, avoids the defect of large sedimentation after construction caused by the backfill of the cave slag of the cave, has simple structure, clear stress and strong construction operability, and can shorten the construction period and improve the engineering safety.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an overall schematic view of the reinforced concrete slab structure of the utility model spanning large karst cave.
Fig. 2 is the mounting structure schematic diagram of the reinforced concrete slab and the reinforced concrete pile of the utility model.
FIG. 3 is a flow chart of the construction method of the reinforced concrete slab structure spanning a large karst cave.
In the figure: the method comprises the following steps of 1-reinforced concrete pile, 2-reinforced concrete slab, 3-waterproof curtain, 4-large karst cave, 21-arch plate bulge, 22-plain pavement, 31-first curtain section and 32-second curtain section.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 and 2, the present invention provides a reinforced concrete slab structure spanning a large karst cave 4, which is used for road construction with the large karst cave 4 at the bottom, and includes a reinforced concrete slab 2 spanning the large karst cave 4;
reinforced concrete slab 2 lay in the top of large-scale karst cave 4, reinforced concrete slab 2 is close to one side of large-scale karst cave 4 is provided with water proof curtain 3, and reinforced concrete slab 2 is close to one side of large-scale karst cave 4 is provided with reinforced concrete pile 1.
Further, referring to fig. 1, the waterproof curtain 3 includes a first curtain section 31 and a second curtain section 32 respectively disposed on the reinforced concrete slab 2, and the first curtain section 31 and the second curtain section 32 are respectively located at two sides of the large cavern 4.
Further, reinforced concrete pile 1 is the precast pile, is used for right reinforced concrete slab 2 carries out single vertical support.
Further, referring to fig. 1, the reinforced concrete slab 2 has an arch protrusion 21 and a flat surface 22, the arch protrusion 21 is located on one side of the reinforced concrete slab 2 close to the reinforced concrete pile 1; the flat decking 22 is located on the side of the reinforced concrete slab 2 remote from the arch bar projections 21.
Further, referring to fig. 1 and 2, the reinforced concrete piles 1 are provided in plural numbers and are respectively arranged in a direction transverse to a direction in which the reinforced concrete slab 2 is laid.
Further, referring to fig. 1 and 2, the reinforced concrete piles 1 are provided in a plurality in number and are respectively arranged in a longitudinal direction of a laying direction of the reinforced concrete slab 2.
In the embodiment, the engineering survey generally adopts a physical detection means such as electromagnetic wave tomography (CT imaging) or drilling video detection method to fully understand the development rule, basic form, scale size, karst cave roof rock thickness, integrity, shape of the filling material in the cave, etc. of the karst cave encountered by the hydraulic tunnel, and provides basis for design and construction; meanwhile, a stable first-stage excavation supporting measure is adopted to ensure that construction is carried out smoothly, the spanning length of a reinforced concrete slab 2 of a large karst cave 4 is large, the large karst cave 4 is of a cavity structure, reinforced concrete piles 1 are precast piles, and the advantages of convenient construction and high vertical bearing capacity of a single pile are achieved, the first curtain section 31 and the second curtain section 32 are respectively connected to the reinforced concrete slab 2 in a concrete pouring mode and are respectively arranged on two sides of the large karst cave 4, the reinforced concrete piles 1 are distributed on the reinforced concrete slab 2 along the line in a mode that the reinforced concrete slabs 2 are arranged at a large interval at the position far away from the large karst cave 4 and are closely arranged at the position of the reinforced concrete slab 2 close to the large karst cave 4, wherein three reinforced concrete piles 1 are transversely arranged on the reinforced concrete slab 2, the reinforced concrete piles 1 are arranged below a cavity bottom plate (which is the cavity bottom solid part of the karst cave) and are arranged at a depth which is not less than the length of the diameter of the cavity of the reinforced concrete piles 1, and a pile foundation is arranged at the bottom of the cavity 2 without the cavity or the cavity (which is arranged above the cavity of the reinforced concrete piles 2, and a novel reinforced concrete slab 2 is arranged in a mode that the cavity structure is poured in a whole karst cave and the cavity 2, and bears the load of the surrounding rock. Compared with the traditional cave crossing method by adopting a backfilling method, the cave crossing method by adopting the reinforced concrete slab 2 type structure has the advantages of reliable structure and convenient construction, avoids the defect of large post-construction settlement caused by the backfill of the cave slag of the cave, has simple structure, clear stress and strong construction operability, can shorten the construction period and improve the engineering safety, and has better engineering benefit and social benefit.
Referring to fig. 3, a construction method of a reinforced concrete slab structure spanning a large karst cave 4 includes the following steps:
excavating a cutting to the bottom surface of the preset reinforced concrete slab 2;
surveying and drilling holes according to the designed pile positions one by one, and finding out the distribution range of karst caves;
erecting waterproof curtains 3 on two sides of the karst cave;
arranging pile holes of reinforced concrete piles 1 according to the distribution range of the karst cave, arranging a reinforced concrete plate 2 above the pile holes, and covering the horizontal cross-sectional area of the cavity of the karst cave with the horizontal area of the reinforced concrete plate 2;
laying a reinforced concrete pile 1, designing the length of the reinforced concrete pile 1, and integrally casting a reinforced concrete plate 2 and the reinforced concrete pile 1;
constructing a reinforced concrete arch slab and a reinforced concrete flat slab;
and filling the roadbed above the reinforced concrete arch slabs and the reinforced concrete flat slabs.
In this embodiment, the span length of the reinforced concrete slab 2 of the large karst cave 4 is large, the large karst cave 4 is a cavity structure, the reinforced concrete piles 1 are precast piles, and therefore, the construction is convenient and the vertical bearing capacity of a single pile is high, the first curtain section 31 and the second curtain section 32 are respectively connected to the reinforced concrete slab 2 by concrete pouring and are respectively arranged on two sides of the large karst cave 4, and the reinforced concrete piles 1 are distributed on the line of the reinforced concrete slab 2: the reinforced concrete slabs 2 are arranged at positions far away from the large karst cave 4 at large intervals, and the reinforced concrete slabs 2 are closely arranged at positions close to the large karst cave 4, wherein the reinforced concrete slabs 2 are transversely provided with three reinforced concrete piles 1, and the reinforced concrete piles 1 are arranged at depths which are not less than the length of the diameter times of the piles below a bottom plate (which refers to the solid part at the bottom of the karst cave cavity); the pile foundation of the reinforced concrete pile 1 of the reinforced concrete slab 2 section is arranged at the top of a karst cave cavity without a safe karst cave cavity or a safe top plate (referring to the solid part of the position above the karst cave cavity) at the bottom. And the reinforced concrete slab 2 and the reinforced concrete pile 1 are integrally poured.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (6)
1. A reinforced concrete plate type structure spanning a large karst cave is used for road construction with the large karst cave at the bottom and is characterized by comprising a reinforced concrete plate spanning the large karst cave,
the reinforced concrete slab is laid above the large karst cave, one side of the reinforced concrete slab, which is close to the large karst cave, is provided with a waterproof curtain, and one side of the reinforced concrete slab, which is close to the large karst cave, is provided with a reinforced concrete pile.
2. A reinforced concrete slab structure spanning a large cavern as recited in claim 1,
the waterproof curtain comprises a first curtain section and a second curtain section which are arranged on the reinforced concrete slab respectively, and the first curtain section and the second curtain section are located on two sides of the large karst cave respectively.
3. A reinforced concrete slab structure spanning a large cavern as recited in claim 1,
the reinforced concrete pile is a precast pile and is used for supporting the reinforced concrete slab in a single-pile vertical mode.
4. A reinforced concrete slab structure spanning a large cavern as recited in claim 1,
the reinforced concrete slab is provided with an arch bar bulge and a flat pavement, and the arch bar bulge is positioned on one side of the reinforced concrete slab close to the reinforced concrete pile; the flat pavement is positioned on one side of the reinforced concrete slab away from the arch plate bulge.
5. A reinforced concrete slab structure spanning a large cavern as recited in claim 1,
the reinforced concrete piles are multiple in number and are arranged in the transverse direction of the laying direction of the reinforced concrete slabs respectively.
6. A reinforced concrete slab structure spanning a large cavern as recited in claim 1,
the reinforced concrete piles are multiple in number and are arranged in the longitudinal direction of the laying direction of the reinforced concrete slabs respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220825704.2U CN217974480U (en) | 2022-04-11 | 2022-04-11 | Reinforced concrete plate type structure spanning large karst cave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220825704.2U CN217974480U (en) | 2022-04-11 | 2022-04-11 | Reinforced concrete plate type structure spanning large karst cave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217974480U true CN217974480U (en) | 2022-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220825704.2U Active CN217974480U (en) | 2022-04-11 | 2022-04-11 | Reinforced concrete plate type structure spanning large karst cave |
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| CN (1) | CN217974480U (en) |
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2022
- 2022-04-11 CN CN202220825704.2U patent/CN217974480U/en active Active
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