CN111576487B - Underground engineering foundation bottom plate structure and construction method thereof - Google Patents
Underground engineering foundation bottom plate structure and construction method thereof Download PDFInfo
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- CN111576487B CN111576487B CN202010483724.1A CN202010483724A CN111576487B CN 111576487 B CN111576487 B CN 111576487B CN 202010483724 A CN202010483724 A CN 202010483724A CN 111576487 B CN111576487 B CN 111576487B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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Abstract
The invention relates to the technical field of underground structure engineering, and discloses an underground engineering foundation slab structure and a construction method thereof, which solve the problems that the underground structure engineering foundation slab and the construction and use method thereof in the current market have poor pressure-bearing effect, the slab is easy to generate the condition of local cracking, the service life and the stability of the slab are influenced, the peripheral protection measures of the slab are lacked, the condition of edge collapse is easy to occur, the normal use of the whole slab is influenced, the horizontal heights of the bottom layers paved on the slab are different, the pressure-bearing capacity of the slab is uneven, and the slab is easy to damage; the invention has the advantages of good pressure bearing effect, no local cracking due to large pressure, long service life, good stability, good protection for the periphery of the bottom plate, no edge collapse, stable use of the bottom plate, same horizontal height of paved objects, uniform pressure of the bottom plate and no damage.
Description
Technical Field
The invention belongs to the technical field of underground building construction, and particularly relates to an underground engineering foundation bottom plate structure and a construction method thereof.
Background
The underground structure is divided into an arch structure, a circular and rectangular tubular structure, a frame structure, a thin shell structure and a special-shaped structure according to the structural form, and the load born by the underground structure is divided into the following three types according to the action characteristics and the conditions which can appear in use: namely permanent (primary) loads, variable (additional) loads and accidental (extraordinary) loads.
But the foundation slab structure that underground works on the market adopted at present adopts the mode of upper and lower layer packing in proper order to lay layer upon layer, and this will lead to: when the foundation slab structure is used, because the upper part of the foundation slab structure can be subjected to loads from different directions, such as heavy truck rolling, the bearing pressure of each part of the foundation slab structure can have great deviation, and the phenomenon of local stress concentration can occur, so that the stress distribution of each part is uneven; when the deviation change everywhere of the bottom plate is too big, the condition of local cracking of the bottom plate structure can appear, and thus the service life and the stability of the bottom plate can be influenced.
Meanwhile, the periphery of the bottom plate structure lacks protective measures, so that the situation that the edge of the bottom plate is collapsed is easily caused, and the normal use of the whole bottom plate is further influenced; and only can carry out the level test to the bottom plate in laying the in-process, to the laying level condition of bottom plate bottom comparatively random, the inhomogeneous situation of bottom plate pressurized will appear this moment. Therefore, it is desirable to provide an underground engineering foundation slab structure and a related construction method thereof, which can solve the above problems, so as to solve the local cracking caused by the uneven compressive load.
Disclosure of Invention
Aiming at the situation, the invention provides an underground construction foundation slab structure and a construction method thereof, aiming at overcoming the defects of the prior art, and effectively solving the problems that the underground construction foundation slab and the construction and use method thereof in the current market have poor pressure bearing effect, the slab is easy to generate local cracking, the service life and the stability of the slab are influenced, the periphery of the slab is lack of protective measures, the condition of edge collapse is easy to occur, the normal use of the whole slab is influenced, the horizontal heights of the bottom laying layers of the slab are different, the pressure bearing capacity of the slab is uneven, and the slab is easy to damage.
In order to achieve the purpose, the invention provides the following technical scheme:
a first technical aspect of the present invention is to provide an underground engineering foundation slab structure and a construction method thereof,
a foundation slab structure of underground engineering comprises a hard foundation layer, a bottom slab, manual hole digging piles, permanent protection walls, a stabilizing frame and a pressure-bearing body, wherein the permanent protection walls are symmetrically built on the surface of the hard foundation layer in a left-right mode;
a lime layer, a waterproof layer, an asphalt felt protective isolation layer and a fine aggregate concrete protective layer are sequentially constructed and paved on the surface of the hard foundation layer between the left permanent protective wall and the right permanent protective wall from bottom to top, and the stabilizing frame is fixed above the fine aggregate concrete protective layer through a clamping mechanism;
the top surface of the stabilizing frame is provided with a spherical pit, the pressure-bearing body is placed in the spherical pit, and the top of the pressure-bearing body is contacted with the lower surface of the bottom plate;
the lower main body of the manual hole digging pile is vertically buried in the hard foundation layer, and the upper main body of the manual hole digging pile extends upwards and penetrates through the lime layer, the waterproof layer, the asphalt felt protective isolation layer and the fine aggregate concrete protective layer and is in contact with the lower surface of the bottom plate;
the side surface of the permanent protection wall is provided with an auxiliary pile, and the side surface of the auxiliary pile is provided with a protection frame;
furthermore, a water drainage blocking pipe is arranged on the wall body of the permanent protection wall, and the central height of the water drainage blocking pipe is positioned between the central heights of the stabilizing frame and the pressure bearing body;
furthermore, the clamping mechanism is a concrete support body, the concrete support body is laid on the upper surface of the fine aggregate concrete protective layer in an array mode, a groove with the shape matched with that of the bottom of the stabilizing frame is formed in the support body, and the stabilizing frame is installed on the concrete support body in a matched mode;
furthermore, the support body is a triangular support body with a saw-toothed section, the section of an upper groove of the support body is triangular, the section of the bottom of the stabilizing frame is triangular, and the support body realizes stable support for the stabilizing frame through the triangular groove of the support body;
furthermore, the bearing body and the stabilizing frame are both made of steel, corrosion-resistant paint is smeared on the surfaces of the stabilizing frame and the bearing body, and the surface of the bearing body is provided with lines for increasing friction force;
furthermore, the number of the auxiliary piles is arranged at equal intervals along with the width value of the permanent protection wall, the number of the protection frames is equal to the number of the auxiliary piles, and the arrangement distances between the protection frames and the auxiliary piles are equal;
further, the pressure-bearing body comprises a pressure buffering part and a pressure-bearing part, wherein the pressure buffering part is contacted with the bottom surface of the bottom plate, and the pressure-bearing part is positioned below the pressure buffering part and is connected with the pressure buffering part;
furthermore, the surface of the pressure buffering part contacted with the bottom plate is a part of a sphere surface or a wavy surface, the section of the bottom surface contacted with the pressure bearing part is in a sawtooth shape or a wavy shape, and the pressure bearing part is correspondingly provided with a groove which is matched with the bottom surface of the buffering part and has a sawtooth shape or a wavy shape in section;
furthermore, adjacent pressure-bearing bodies are mutually connected through a positioning lug and a positioning groove, namely the positioning lug of one pressure-bearing body is inserted into the positioning groove of the other adjacent pressure-bearing body to ensure the transverse stability of the pressure-bearing bodies, the surface of a sphere, which is contacted with the spherical pit, at the bottom of the pressure-bearing body is provided with a friction shading, and the inner surface of the corresponding spherical pit is also provided with the friction shading.
A construction method of an underground engineering foundation slab structure comprises the following steps:
s1, detecting the geological condition of the construction area,
specifically, carry out the water content to construction area and peripheral soil and detect, carry out the analysis of detection to construction area and peripheral geology condition afterwards again, carry out the analysis of detection to construction area and peripheral geology condition and specifically include: detecting the condition of quicksand, analyzing a debris flow possibility report and collecting and detecting harmful gas; after the detection is finished, collecting and recording detection and analysis data of the quicksand condition detection, the debris flow possibility report analysis and the harmful gas collection detection, and adjusting related construction schemes according to the detection and analysis data to ensure the construction safety;
s2, detecting the height of the object,
specifically, the horizontal height of the ground of the construction area is measured, and in the excavation process, in order to avoid the situation that the excavation depth is too high or too low, the excavation depth needs to be consistent;
s3, monitoring the displacement of the side slope,
specifically, during the construction process, the displacement of the side slope is monitored in real time, when the monitored displacement data exceeds the warning data of the working condition of side slope landslide, the construction operation of the construction area is immediately stopped, the construction operation of the side slope is switched to be carried out, and after the reinforcement operation is finished, the construction operation of the construction area is continued;
s4, carrying out construction operation on the manual hole digging pile,
specifically, when the excavation depth of a construction area reaches a preset depth, carrying out next hole excavation operation of the manual hole excavation pile, when the excavation depth of the manual hole excavation pile is larger than or equal to 10 m, carrying out air supply 5 minutes before each time of operation, and simultaneously needing to make corresponding waterproof measures in the hole excavation process of the manual hole excavation pile;
s5, compacting the construction area,
specifically, after the construction of the manual hole digging pile is finished, a construction area is compacted by a road roller, the horizontal measurement of the construction area is carried out again after the compaction is finished, the condition that the local height is uneven is avoided, and at the moment, the related areas are filled or excavated, so that the ground of the construction area is ensured to be on the same plane;
s6, paving a lime layer,
specifically, lime powder is laid in a construction area to form a lime layer, the lime layer is used for moisture prevention, after the lime layer is laid, the lime layer is compacted again, and the surface of the lime layer is kept on the same horizontal line;
s7, building a permanent protection wall,
specifically, permanent protection walls are piled up on the side faces of the laid lime layers, a pair of permanent protection walls are symmetrically laid left and right, the lime layers are limited between the left permanent protection wall and the right permanent protection wall, and loss of related resources caused by the fact that lime powder in the lime layers is spread out of a construction area on the outer side of the permanent protection walls is avoided;
s8, paving a waterproof layer,
specifically, after the permanent protection wall is built, a waterproof layer is laid, the waterproof layer is compacted as it is, and meanwhile, the tops of the waterproof layers are ensured to be positioned on the same horizontal plane;
s9, paving an asphalt felt protective isolation layer and a fine aggregate concrete protective layer,
specifically, after the waterproof layer is paved, the asphalt felt protective isolation layer and the fine aggregate concrete protective layer are paved in sequence, compaction is still carried out after paving is finished, and the paved horizontal height is measured;
s10, pouring the concrete support body,
specifically, when the fine aggregate concrete protective layer is paved, the integral pouring engineering of the concrete support body is synchronously carried out, after the concrete support body and the fine aggregate concrete protective layer are completely hardened, the stabilizing frame is placed, then the horizontal height of the stabilizing frame is detected, and the height difference between the stabilizing frame and the fine aggregate concrete protective layer is dynamically adjusted according to the detection result;
s11, laying a pressure-bearing body,
specifically, after the stable frame is paved, the pressure-bearing body is placed, after the pressure-bearing body is placed, the horizontal height of the pressure-bearing body is still detected, and the height difference between the pressure-bearing body and the stable frame is dynamically adjusted according to the detection result;
s12 laying floor, auxiliary pile and protective frame
Specifically, after the pressure-bearing body is placed, the beam plate construction work of the bottom plate is carried out; and finally, excavating the auxiliary piles outside the permanent protection wall, so that the outer wall of the permanent protection wall is attached to the surface of the auxiliary piles, and a protection frame is erected outside the auxiliary piles to prevent the auxiliary piles from inclining.
Compared with the prior art, the invention has the beneficial effects that:
1) in the work, the bearing body and the stabilizing frame are laid at the bottom of the bottom plate, when the bottom plate is pressed, the load distribution borne by the bottom plate is not locally concentrated any more, the original supporting surface is replaced by the supporting point of the bearing body, the stress distribution area is reduced, the stress distribution range is reduced, the pressure borne by the bottom plate is prevented from being concentrated in the same local range, the supporting point position of a certain bearing body is not like the concentrated compression of the original local area even if being subjected to a larger load, and therefore the phenomenon that the stress of the original local area is concentrated and cracked is avoided, the underground engineering foundation bottom plate structure is guaranteed to have a better bearing effect when in use, local cracking cannot be generated due to larger pressure, the service life is long, and the stability is good;
2) the permanent protection wall is built outside the bottom plate, then auxiliary piles are excavated outside the permanent protection wall, so that the surface of each auxiliary pile is attached to the outer wall of the permanent protection wall, the permanent protection wall is locally reinforced, and then the auxiliary piles are attached by using the protection frame, so that the auxiliary piles are prevented from deforming, the foundation bottom plate of the underground structural engineering and the construction and use method thereof can well protect the periphery of the bottom plate when in use, the edge collapse is not easy to generate, and the bottom plate is stable to use;
3) the bottom plate bottom lime layer is compacted by the aid of the ground and the bottom plate bottom lime layer, the layered firmness of the bottom plate is enhanced, then, the bottom plate bottom lime layer is horizontally measured, tops of the lime layer and the like are all located on the same horizontal line, the foundation bottom plate of the underground structural engineering and the construction and use method of the foundation bottom plate are guaranteed to be the same in the horizontal height of a laid object when the foundation bottom plate is used, and the bottom plate is uniform in compression and not prone to damage.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention as a whole;
FIG. 2 is a schematic view of the mounting structure of the clamping mechanism of the present invention;
FIG. 3 is a schematic cross-sectional view of a permanent protection wall according to the present invention;
FIG. 4 is a schematic view of one embodiment of a pressure bearing body of the present invention;
FIG. 5 is a schematic view of another embodiment of a pressure bearing body of the present invention;
FIG. 6 is a schematic structural view of a pressure-containing body according to the present invention;
FIG. 7 is a schematic view of two adjacent pressure-bearing bodies of the present invention implemented on a plane;
in the figure: 1. manually digging a hole pile; 2. a lime layer; 3. a waterproof layer; 4. a permanent protection wall; 5. protecting the isolation layer by using asphalt felt; 6. a fine stone concrete protective layer; 7. a stabilizing frame; 8. the pressure-bearing body 81, the pressure buffering part 82, the pressure-bearing part 83, the positioning bump 84 and the positioning groove; 9. a base plate; 10. auxiliary piles; 11. protective frame, 12, concrete support, 13, spherical pit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figures 1, 2 and 3 of the drawings,
the invention provides a foundation slab structure of underground engineering in a first technical aspect, which comprises a hard foundation layer, a bottom plate 9 and a manual hole digging pile 1; the foundation structure also comprises permanent protection walls 4, a stabilizing frame 7 and a pressure-bearing body 8, wherein the permanent protection walls 4 are symmetrically built on the surface of the hard foundation layer in a left-right mode, and a bottom plate 9 is horizontally fixed between the left permanent protection wall 4 and the right permanent protection wall 4; the bottom plate 9 is formed by casting through a formwork, and can be built at the later stage, when the permanent protection wall 4 is built, a reinforcing steel bar opening is reserved, and finally the bottom plate 9 is cast and installed in a beam plate hoisting mode;
a lime layer 2, a waterproof layer 3, an asphalt felt protective isolation layer 5 and a fine aggregate concrete protective layer 6 are sequentially constructed and laid on the surface of the hard foundation layer between the left and right permanent protective walls 4 from bottom to top, and a stabilizing frame 7 is fixed above the fine aggregate concrete protective layer 6 through a clamping mechanism; the thicknesses of the lime layer 2, the waterproof layer 3, the asphalt felt protective isolation layer 5 and the fine aggregate concrete protective layer 6 are flexibly selected according to the plan arrangement of construction projects without limitation; the appearance structure and the height of the stabilizing frame 7 can be dynamically adjusted, but waterproof daub is adopted for construction;
the top surface of the stabilizing frame 7 is provided with a spherical pit 13, the pressure-bearing body 8 is placed in the spherical pit 13, and the top of the pressure-bearing body is contacted with the lower surface of the bottom plate 9; in order to position and install the pressure-bearing body 8, a spherical pit 13 is integrally machined on the surface of the stabilizing frame 7, but the spherical pit 13 is not a complete spherical surface and is only a small half spherical surface structure, the lower part of the pressure-bearing body 8 is matched in the spherical pit 13, and the pressure-bearing body is used for supporting the bottom plate 9 when the bottom plate 9 is installed;
in the technology, the lower part of the pressure bearing body 8 is matched with the spherical pit 13 for placement, so that the positioning effect can be achieved, and the sliding is avoided. However, the middle and/or upper structure of the pressure-bearing body 8 may be designed in other shapes, without limitation, and may be a sphere in fig. 1 or a cylinder in fig. 4-6, and the pressure-bearing body 8 may be formed of concrete or other materials.
The lower main body of the manual hole digging pile 1 is vertically buried in the hard foundation layer, and the upper main body of the manual hole digging pile extends upwards and penetrates through the lime layer 2, the waterproof layer 3, the asphalt felt protective isolation layer 5 and the fine aggregate concrete protective layer 6 and is in contact with the lower surface of the bottom plate 9; the top of the manual hole digging pile 1 is fixedly bonded with the lower surface of the bottom plate 9 by waterproof mortar, and supports the load of the bottom plate 9 together with the pressure bearing body 8;
the permanent protection wall 4 is provided with auxiliary piles 10 at the side surfaces thereof, and protection frames 11 are provided at the side surfaces of the auxiliary piles 10. The auxiliary piles 10 are installed at intervals, and the protective frame 11 is of a steel frame structure and is used as a fixed support for the auxiliary piles 10.
Preferably, a water drainage blocking pipe is arranged on the wall body of the permanent protection wall 4, and the central height of the water drainage blocking pipe is between the central height of the stabilizing frame 7 and the central height of the pressure bearing body 8. The drainage water plugging pipe is installed in a mode of being buried in advance, when a permanent protection wall 4 is built in construction, the drainage water plugging pipe is directly installed on the wall body of the permanent protection wall 4 at intervals, waterproof mortar is used for plugging, bonding and installing, in an underground structure, a fixing frame 7 and a pressure-bearing body 8 are arranged between a bottom plate 9 and a fine aggregate concrete protection layer 6, gaps exist around the fixing frame, water possibly passes through the time and is accumulated, therefore, the drainage water plugging pipe of the permanent protection wall 4 can be drained with accumulated water, but the drainage is smooth, and the central height of the drainage water plugging pipe is ensured to be located between the central heights of the fixing frame 7 and the pressure-bearing body 8.
Preferably, the clamping mechanism is a concrete support body 12, the concrete support body 12 is laid on the upper surface array of the fine aggregate concrete protective layer 6, a groove with the shape matched with that of the bottom of the stabilizing frame 7 is formed in the concrete support body 12, and the stabilizing frame 7 is installed on the concrete support body 12 in a matched mode. Concrete support 12 is under construction when laying at pea gravel concrete protective layer 6 an organic whole and is carried out formwork and build and pour, and integrative sclerosis shaping back carries out the building of firm frame 7, and as shown in figure 2, concrete support 12 is laid in the upper surface array of pea gravel concrete protective layer 6, and firm frame 7 cooperation is installed between two adjacent concrete support 12, and firm frame 7 is the steel billet structure, and it can to bond fixedly to fill waterproof clay all around. If adopt other waterproof material, can adopt same molding to install. Further, the structure of the stabilizing frame 7 may not be limited.
Preferably, the support 12 is a triangular support with a saw-toothed cross section, the cross section of the upper groove is triangular, the cross section of the bottom of the stabilizing frame 7 is triangular, and the support 12 stably supports the stabilizing frame 7 through the triangular groove.
Preferably, the bearing body 8 and the stabilizing frame 7 are made of steel, the surfaces of the stabilizing frame 7 and the bearing body 8 are coated with corrosion-resistant coating, and the surface of the bearing body is provided with lines for increasing friction force. The bearing body 8 and the firm frame 7 are matched for processing, the corrosion-resistant coating can prolong the service life of the bearing body 8 and the firm frame 7, and the lines can further increase the friction force of the contact surface, so that the bearing body is more stable.
Preferably, the number of the auxiliary piles 10 is set at equal intervals according to the width value of the permanent protection wall 4, and the equal intervals of the auxiliary piles 10 are set at a distance of one meter. Here, the number of the auxiliary piles 10 is set at an equal distance following the width of the permanent protection wall 4, and the equal distance of the auxiliary piles 10 is one meter, which is enough for conventional construction.
Preferably, the number of the protection frames 11 is equal to the number of the auxiliary piles 10, and the arrangement distances between the protection frames 11 and the auxiliary piles 10 are the same. Here, the number of the protection frames 11 is equal to the number of the auxiliary piles 10, and the installation distances between the protection frames 11 and the auxiliary piles 10 are the same, which is enough for conventional construction.
In a preferred embodiment, the pressure receiving body 8 includes a pressure buffering portion 81 and a pressure receiving portion 82, wherein the pressure buffering portion 81 contacts with the bottom surface of the bottom plate 9, and the pressure receiving portion 82 is located below the pressure buffering portion 81 and connected to the pressure buffering portion 81. The purpose of setting up pressure buffer 81 and pressure-bearing portion 82 is in when guaranteeing the pressure-bearing, uses pressure buffer 81 to cushion the pressure that bottom plate 9 bore, realizes further sparse and the decomposition of strength, reduces the whole strength impact in the short time that receives of foundatin plate structure, has prolonged the life of whole foundatin plate structure.
Preferably, the surface of the pressure buffer part 81 contacting with the bottom plate 9 is a part of a sphere surface or a wavy surface, as shown in fig. 4, a wavy surface structure is adopted; as shown in fig. 5, a spherical surface structure is adopted; the cross section of the bottom surface of the pressure buffering part 81 contacting the pressure bearing part 82 is zigzag or wavy, and the pressure bearing part 82 is correspondingly provided with a groove with a zigzag or wavy cross section matching with the bottom surface of the pressure buffering part 81, as shown in fig. 6, in this embodiment, the cross section of the bottom surface of the pressure buffering part 81 contacting the pressure bearing part 82 is matched and connected by adopting the zigzag groove. The contact surface of the pressure buffering part 81 and the bottom plate 9 is set to be a spherical surface or a wavy surface, particularly, the wavy surface, so that the bottom plate can buffer and disperse bearing force more effectively, and the practical use effect is remarkable.
Preferably, adjacent pressure-bearing bodies 8 are connected with each other through a positioning bump 83 and a positioning groove 84, that is, the positioning bump 83 of one pressure-bearing body 8 is inserted into the positioning groove 84 of another adjacent pressure-bearing body 8, as shown in fig. 7, so as to ensure the stability of the pressure-bearing body 8 in the transverse direction, the spherical surface of the bottom of the pressure-bearing body 8, which is in contact with the spherical pit 13, is provided with a friction texture, and the inner surface of the corresponding spherical pit 13 is also provided with a friction texture. This further improves the overall stability.
The second technical aspect of the present invention is to provide a construction method of an underground engineering foundation slab structure, including the following steps:
s1, detecting the geological condition of the construction area,
specifically, carry out the water content to construction area and peripheral soil and detect, carry out the analysis of detection to construction area and peripheral geology condition afterwards again, carry out the analysis of detection to construction area and peripheral geology condition and specifically include: detecting the condition of quicksand, analyzing a debris flow possibility report and collecting and detecting harmful gas; after the detection is finished, collecting and recording detection and analysis data of the quicksand condition detection, the debris flow possibility report analysis and the harmful gas collection detection, and adjusting related construction schemes according to the detection and analysis data to ensure the construction safety;
s2, detecting the height of the object,
specifically, the horizontal height of the ground of the construction area is measured, and in the excavation process, in order to avoid the situation that the excavation depth is too high or too low, the excavation depth needs to be consistent;
s3, monitoring the displacement of the side slope,
specifically, during the construction process, the displacement of the side slope is monitored in real time, when the monitored displacement data exceeds the warning data of the working condition of side slope landslide, the construction operation of the construction area is immediately stopped, the construction operation of the side slope is switched to be carried out, and after the reinforcement operation is finished, the construction operation of the construction area is continued;
s4, carrying out construction operation on the manual hole digging pile,
specifically, when the excavation depth of a construction area reaches a preset depth, carrying out next hole excavation operation of the manual hole excavation pile, when the excavation depth of the manual hole excavation pile is larger than or equal to 10 m, carrying out air supply 5 minutes before each time of operation, and simultaneously needing to make corresponding waterproof measures in the hole excavation process of the manual hole excavation pile;
s5, compacting the construction area,
specifically, after the construction of the manual hole digging pile 1 is finished, a construction area is compacted by a road roller, horizontal measurement of the construction area is carried out again after the compaction is finished, the situation that the local height is uneven is avoided, and at the moment, the related areas are filled or excavated, so that the ground of the construction area is ensured to be on the same plane;
s6, paving a lime layer,
specifically, lime powder is laid in a construction area to form a lime layer 2, the lime layer 2 is used for moisture prevention, after the lime layer 2 is laid, the lime layer 2 is compacted again, and the surface of the lime layer 2 is kept on the same horizontal line;
s7, building a permanent protection wall,
specifically, permanent protection walls 4 are piled up on the side surfaces of the laid lime layers 2, a pair of permanent protection walls 4 are symmetrically laid left and right, the lime layers 2 are limited between the left and right permanent protection walls 4, and loss of related resources caused by the fact that lime powder in the lime layers 2 is spread out of a construction area on the outer side of the permanent protection walls 4 is avoided;
s8, paving a waterproof layer,
specifically, after the permanent protection wall is built, the waterproof layer 3 is laid, the waterproof layer 3 is compacted as it is, and meanwhile, the top of the waterproof layer 3 is ensured to be in the same horizontal plane;
s9, paving an asphalt felt protective isolation layer 5 and a fine aggregate concrete protective layer 6,
specifically, after the waterproof layer 3 is paved, the asphalt felt protective isolation layer 5 and the fine aggregate concrete protective layer 6 are paved in sequence, compaction is still carried out after paving is finished, and the horizontal height of paving is measured;
s10, pouring the concrete support body 12,
specifically, when the fine aggregate concrete protective layer 6 is paved, the integral casting engineering of the concrete support body 12 is synchronously performed, after the concrete support body 12 and the fine aggregate concrete protective layer 6 are completely hardened, the stabilizing frame 7 is placed, then the horizontal height of the stabilizing frame 7 is detected, and the height difference between the stabilizing frame 7 and the fine aggregate concrete protective layer 6 is dynamically adjusted according to the detection result;
s11, laying a pressure bearing body 8,
specifically, after the stable frame 7 is laid, the pressure-bearing body 8 is placed, after the pressure-bearing body 8 is placed, the horizontal height of the pressure-bearing body 8 is still detected, and the height difference between the pressure-bearing body 8 and the stable frame 7 is dynamically adjusted according to a detection result;
s12 laying floor, auxiliary pile and protective frame
Specifically, after the pressure-bearing body 8 is placed, the beam plate construction work of the bottom plate 9 is carried out; and finally, excavating the auxiliary piles 10 on the outer side of the permanent protection wall 4 to ensure that the outer wall of the permanent protection wall 4 is attached to the surfaces of the auxiliary piles 10, and erecting a protection frame 11 outside the auxiliary piles 10 to prevent the auxiliary piles 10 from inclining.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an underground works foundation slab structure, includes stereoplasm ground base layer, bottom plate (9) and artifical dug hole stake (1), its characterized in that: the foundation bed is characterized by further comprising permanent protection walls (4), a stabilizing frame (7) and a pressure-bearing body (8), wherein the permanent protection walls (4) are symmetrically laid on the surface of the hard foundation bed in a left-right mode, a pair of bottom plates (9) are horizontally fixed between the left permanent protection wall and the right permanent protection wall (4), and the bottom of the pressure-bearing body (8) is a hemisphere or a small hemisphere; a lime layer (2), a waterproof layer (3), an asphalt felt protective isolation layer (5) and a fine aggregate concrete protective layer (6) are sequentially constructed and laid on the surface of the hard foundation layer between the left permanent protective wall and the right permanent protective wall (4) from bottom to top, and a stabilizing frame (7) is fixed above the fine aggregate concrete protective layer (6) through a clamping mechanism; the top surface of the stabilizing frame (7) is provided with a spherical pit (13), the pressure-bearing body (8) is placed in the spherical pit (13), and the top of the pressure-bearing body is contacted with the lower surface of the bottom plate (9); the lower main body of the manual hole digging pile (1) is vertically buried in a hard foundation layer, and the upper main body of the manual hole digging pile extends upwards and penetrates through a lime layer (2), a waterproof layer (3), an asphalt felt protective isolation layer (5) and a fine aggregate concrete protective layer (6) and is in contact with the lower surface of a bottom plate (9); auxiliary piles (10) are installed on the side faces of the permanent protection walls (4), and protection frames (11) are installed on the side faces of the auxiliary piles (10).
2. An underground construction foundation bedplate structure according to claim 1, wherein: and a water drainage blocking pipe is arranged on the wall body of the permanent protection wall (4), and the central height of the water drainage blocking pipe is positioned between the central height of the stabilizing frame (7) and the central height of the pressure bearing body (8).
3. An underground construction foundation bedplate structure according to claim 1 or 2, wherein: the clamping mechanism is a concrete support body (12), the concrete support body (12) is paved on the upper surface array of the fine aggregate concrete protective layer (6), a groove with the shape matched with that of the bottom of the stabilizing frame (7) is formed in the concrete support body (12), and the stabilizing frame (7) is installed on the concrete support body (12) in a matched mode.
4. An underground construction foundation bedplate structure according to claim 3, wherein: the concrete support body (12) is a triangular support body with a saw-toothed section, the section of an upper groove of the triangular support body is triangular, the section of the bottom of the stabilizing frame (7) is triangular, and the concrete support body (12) realizes stable support on the stabilizing frame (7) through the triangular groove of the concrete support body.
5. An underground construction foundation bedplate structure according to claim 1, wherein: the bearing body (8) and the stabilizing frame (7) are made of steel, corrosion-resistant paint is smeared on the surfaces of the stabilizing frame (7) and the bearing body (8), and lines for increasing friction force are arranged on the surface of the bearing body.
6. An underground construction foundation bedplate structure according to claim 1, wherein: the quantity of supplementary stake (10) is followed the width value equidistance setting of permanent protection wall (4), the quantity of protection frame (11) equals with the quantity that sets up of supplementary stake (10), and protection frame (11) is the same with the distance that sets up of supplementary stake (10).
7. An underground construction foundation bedplate structure according to claim 1, wherein:
the pressure-bearing body (8) comprises a pressure buffering part (81) and a pressure-bearing part (82), wherein the pressure buffering part (81) is in contact with the bottom surface of the bottom plate (9), and the pressure-bearing part (82) is positioned below the pressure buffering part (81) and is connected with the pressure buffering part (81).
8. An underground construction foundation bedplate structure according to claim 7, wherein:
the surface of the pressure buffering part (81) contacted with the bottom plate (9) is a part of a sphere surface or a wavy surface, the section of the bottom surface of the pressure buffering part (81) contacted with the pressure bearing part (82) is zigzag or wavy, and the pressure bearing part (82) is correspondingly provided with a groove which is matched with the bottom surface of the pressure buffering part (81) and has a zigzag or wavy section.
9. An underground construction foundation bedplate structure according to claim 8, wherein:
the adjacent pressure-bearing bodies (8) are mutually connected through the positioning lug (83) and the positioning groove (84), namely the positioning lug (83) of one pressure-bearing body (8) is inserted into the positioning groove (84) of the other adjacent pressure-bearing body (8) to ensure the stability of the pressure-bearing body (8) in the transverse direction, the spherical surface of the bottom of the pressure-bearing body (8) contacted with the spherical pit (13) is provided with a friction shading, and the inner surface of the corresponding spherical pit (13) is also provided with a friction shading.
10. A method of constructing an underground construction foundation slab structure according to any one of claims 1 to 9, comprising the steps of: s1, detecting the geological condition of the construction area, specifically, detecting the water content of the construction area and the surrounding soil, then detecting and analyzing the construction area and the surrounding geological condition, and specifically including: detecting the condition of quicksand, analyzing a debris flow possibility report and collecting and detecting harmful gas; after the detection is finished, collecting and recording detection and analysis data of the quicksand condition detection, the debris flow possibility report analysis and the harmful gas collection detection, and adjusting related construction schemes according to the detection and analysis data to ensure the construction safety;
s2, height detection, specifically, measuring the horizontal height of the ground of the construction area, wherein in the excavation process, in order to avoid the situation that the excavation depth is too high or too low, the excavation depth needs to be consistent;
s3, monitoring side slope displacement, specifically, monitoring the displacement of the side slope in real time in the construction process, immediately stopping construction operation on the construction area when the monitored displacement data exceeds the warning data of the working condition of side slope landslide, switching to the reinforcement operation on the side slope, and continuing the construction operation on the construction area after the reinforcement operation is finished;
s4, carrying out construction operation on the manual hole digging pile, specifically, carrying out hole digging operation on the manual hole digging pile in the next step when the digging depth of a construction area reaches a preset depth, carrying out air supply 5 minutes before each time of digging when the digging depth of the manual hole digging pile is more than or equal to 10 m, and simultaneously needing to make corresponding waterproof measures in the hole digging process of the manual hole digging pile;
s5, performing construction area compaction operation, specifically, after the construction of the manual hole digging pile (1) is finished, compacting the construction area by using a road roller, performing horizontal measurement on the construction area again after the compaction is finished, avoiding the situation that the local height is uneven, and filling or excavating related areas at the moment, thereby ensuring that the ground of the construction area is on the same plane;
s6, paving a lime layer, specifically, paving lime powder in a construction area to form a lime layer (2), carrying out moisture prevention by using the lime layer (2), compacting the lime layer (2) again after the lime layer (2) is paved, and keeping the surface of the lime layer (2) on the same horizontal line;
s7, building a permanent protection wall, specifically, building the permanent protection wall (4) on the side surface of the laid lime layer (2), wherein the permanent protection wall (4) is symmetrically laid in a left-right mode, the lime layer (2) is limited between the left permanent protection wall and the right permanent protection wall (4), and therefore the loss of related resources caused by the fact that lime powder in the lime layer (2) is spread out of a construction area on the outer side of the permanent protection wall (4) is avoided;
s8, paving a waterproof layer, specifically, paving the waterproof layer (3) after the permanent protection wall is completely built, compacting the waterproof layer (3) as it is, and simultaneously ensuring that the top of the waterproof layer (3) is positioned at the same horizontal plane;
s9, paving the asphalt felt protective isolation layer (5) and the fine aggregate concrete protective layer (6), specifically, after the waterproof layer (3) is paved, sequentially paving the asphalt felt protective isolation layer (5) and the fine aggregate concrete protective layer (6), compacting after paving, and measuring the horizontal height of paving;
s10, pouring the concrete support body (12), specifically, when the fine aggregate concrete protective layer (6) is paved, synchronously carrying out integral pouring engineering of the concrete support body (12), placing the stabilizing frame (7) after the concrete support body (12) and the fine aggregate concrete protective layer (6) are completely hardened, then carrying out detection on the horizontal height of the stabilizing frame (7), and dynamically adjusting the height difference between the stabilizing frame (7) and the fine aggregate concrete protective layer (6) according to the detection result;
s11, paving the pressure-bearing body (8), specifically, after the stable frame (7) is paved, placing the pressure-bearing body (8), after the pressure-bearing body (8) is placed, detecting the horizontal height of the pressure-bearing body (8) as before, and dynamically adjusting the height difference between the pressure-bearing body (8) and the stable frame (7) according to the detection result;
s12, laying a floor, auxiliary piles and a protection frame, and specifically, after the pressure-bearing body (8) is placed, carrying out beam slab construction work of the bottom plate (9); and finally, excavating the auxiliary piles (10) on the outer side of the permanent protection wall (4), so that the outer wall of the permanent protection wall (4) is attached to the surfaces of the auxiliary piles (10), and erecting a protective frame (11) outside the auxiliary piles (10) to prevent the auxiliary piles (10) from inclining.
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| CN114197527B (en) * | 2021-12-31 | 2023-04-14 | 广东中都建筑集团有限公司 | Prestress tensioning system for basement anti-floating construction and construction method thereof |
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