CN214061557U

CN214061557U - Backfill miscellaneous soil composite foundation structure

Info

Publication number: CN214061557U
Application number: CN202022765810.XU
Authority: CN
Inventors: 李良勇; 李晓兵; 郝丽霞; 许嘉琪; 孟宪瑞; 梁秋生
Original assignee: Mingda Ocean Engineering Co ltd
Current assignee: Mingda Ocean Engineering Co ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-08-27
Anticipated expiration: 2030-11-25

Abstract

The utility model belongs to the technical field of the technique of a foundation construction structure and specifically relates to a backfill miscellaneous soil composite foundation structure is related to, it includes artifical long-pending soil layer and flood layer, the vertical slip casting pipe that has inserted in artifical long-pending soil layer and the flood layer, a plurality of slip casting holes have evenly been seted up on the lateral wall of slip casting pipe, slip casting pipe middle part just is located the position in artifical long-pending soil layer and is provided with the partition plate, the top of partition plate forms first cement thick liquid layer, the below of partition plate forms second cement thick liquid layer to second cement thick liquid layer distributes in the inside of slip casting pipe, artifical long-pending soil layer and flood layer. This application has the effect of the degree of depth that improves the grout of impressing in the ground inside.

Description

Backfill miscellaneous soil composite foundation structure

Technical Field

The application relates to the technical field of foundation construction structures, in particular to a backfill miscellaneous soil composite foundation structure.

Background

The foundation refers to the soil or rock mass of the supporting foundation under the building. Soil layers serving as building foundations are divided into rock, gravel soil, sandy soil, silt, cohesive soil and artificial filling ground layers which are relatively complex, the ground layers contain relatively large amount of artificial backfill soil, and the artificial backfill soil contains relatively large amount of broken stones, bricks, ash, steel slag and concrete blocks, so that the soil quality is relatively complex, and the foundations need to be treated.

The patent document with the publication number of CN208379624U discloses a backfill miscellaneous soil composite foundation structure, which comprises an artificial soil layer and a flood layer, wherein a plurality of steel pipe piles are arranged in the artificial soil layer and the flood layer at equal intervals; adopting an air compressor to match with a down-the-hole hammer drill to form holes on the artificial soil layer and the flood layer, and drilling a plurality of vertical pile holes at intervals; the steel pipe pile comprises a steel pipe inserted in the pile hole, a first cement paste layer is injected in the steel pipe, and a second cement paste layer is injected between the steel pipe and the pile hole; and a third cement paste layer is formed between the steel pipe piles.

The third cement paste layer formed in the above structure is pressed into the ground to a shallow depth.

SUMMERY OF THE UTILITY MODEL

In order to improve the degree of depth of impressing grout in ground inside, this application provides a backfill miscellaneous soil composite foundation structure.

The application provides a backfill miscellaneous soil composite foundation structure adopts following technical scheme:

the utility model provides a backfill miscellaneous soil composite foundation structure, includes artifical long-pending soil layer and flood layer, the slip casting pipe has vertically been inserted in artifical long-pending soil layer and the flood layer, has evenly seted up a plurality of slip casting holes on the lateral wall of slip casting pipe, slip casting pipe middle part just is located the intraformational position of artifical long-pending soil and is provided with the cut-off board, the top of cut-off board forms first cement thick liquid layer, the below of cut-off board forms second cement thick liquid layer to second cement thick liquid layer distributes in the inside of slip casting pipe, artifical long-pending soil layer and flood layer.

Through adopting above-mentioned technical scheme, during the use, the slip casting pipe inserts in artifical long-pending soil layer and the flood layer, and set up the segmentation board in the slip casting pipe, the first grout layer that is located segmentation board top gets into the pouring earlier, make the system cement thick liquid layer consolidate the partly of artifical long-pending soil layer earlier, then through setting up the second cement thick liquid layer, make the second grout thick liquid layer diffuse artifical long-pending soil layer and flood layer, the second cement thick liquid layer is in the below on first cement thick liquid layer simultaneously, thereby can improve the diffusion degree of depth of the used grout of second grout thick liquid layer, and then improved the reinforcement intensity to long-pending soil layer and flood layer.

Preferably, the partition plate is connected to a first inner pipe and a second inner pipe, the lower end of the first inner pipe is located above the partition plate, and the lower end of the second inner pipe extends below the partition plate.

Through adopting above-mentioned technical scheme, set up first inner tube and second inner tube on the partition plate, be used for conveniently forming the second cement thick liquid layer through the second inner tube.

Preferably, a pile hole is formed in the artificial soil layer, a pile pipe is arranged in the pile hole, the pile pipe and the pile hole are arranged at intervals, a concrete layer is filled between the pile pipe and the pile hole, and the inner diameter of the pile pipe is equal to the outer diameter of the grouting pipe.

By adopting the technical scheme, the pile hole is formed in the manual accumulated soil layer, then the pile pipe is arranged in the pile hole, so that a concrete layer is formed between the pile pipe and the pile hole, and the verticality can be improved when the hole for the grouting pipe is drilled.

Preferably, be provided with a plurality of horizontal pipes on the outer wall of stake pipe, the horizontal pipe extends to in the inner wall in stake hole, the one end that the horizontal pipe is close to the stake pipe sets up with the slip casting hole on the slip casting pipe is corresponding.

Through adopting above-mentioned technical scheme, the horizontal pipe is installed on the outer wall of stake pipe to along on the inner wall to the stake hole, conveniently form first cement thick liquid layer through the horizontal pipe in to artifical long-pending soil horizon.

Preferably, a threaded hole is formed in the pile tube, and one end, close to the pile tube, of the horizontal tube is in threaded connection with the pile tube through the threaded hole.

By adopting the technical scheme, the threaded hole in the pile pipe is used for connecting the horizontal pipe in a threaded manner, so that the horizontal pipe can be connected after the pile pipe is installed, and the horizontal pipe is convenient to arrange.

Preferably, a plurality of said horizontal pipes are distributed within the first and second cement slurry layers.

By adopting the technical scheme, the horizontal pipes are distributed in the first cement slurry layer and the second cement slurry layer, and can also diffuse into the artificial soil accumulation layer through the horizontal pipes when the second cement slurry layer is formed.

Preferably, a steel reinforcement cage is arranged in the concrete layer.

Through adopting above-mentioned technical scheme, be provided with the steel reinforcement cage in the concrete layer, can improve the intensity on concrete layer through the steel reinforcement cage, make concrete layer can bear the pressure of building.

Preferably, the length of the pile pipe is 1m-2m, and the length of the grouting pipe is 7m-20 m.

By adopting the technical scheme, the length of the pile pipe is set to be 1m-2m, so that the excavation depth of the pile hole is smaller, and the construction efficiency of the pile hole is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the grouting pipe is inserted into the artificial accumulated soil layer and the flood accumulated layer, the dividing plate is arranged in the grouting pipe, the first cement slurry layer above the dividing plate is poured firstly, the system cement slurry layer firstly reinforces one part of the artificial accumulated soil layer, then the second cement slurry layer is arranged to be diffused to the artificial accumulated soil layer and the flood accumulated layer, and meanwhile, the second cement slurry layer is arranged below the first cement slurry layer, so that the diffusion depth of the cement slurry used by the second cement slurry layer can be improved;

2. pile holes are formed in the pile layer, and then pile pipes are arranged in the pile holes, so that a concrete layer is formed between the pile pipes and the pile holes, and the verticality can be improved when holes for grouting pipes are drilled;

3. install on the outer wall of stake pipe through the horizontal pipe to along on the inner wall to the stake hole, conveniently form first cement thick liquid layer through the horizontal pipe in to artifical long-pending soil horizon.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is an enlarged partial schematic view of portion A of FIG. 1;

FIG. 3 is a schematic view showing a connection structure of horizontal tubes.

Description of reference numerals: 1. manually accumulating soil layers; 2. flood lamination layer; 3. pile holes; 4. pile pipes; 41. a threaded hole; 5. a horizontal tube; 6. a reinforcement cage; 7. a concrete layer; 8. a grouting pipe; 81. grouting holes; 82. dividing the plate; 83. a first inner tube; 84. a second inner tube; 91. a first cement slurry layer; 92. a second cement slurry layer.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses backfill miscellaneous soil composite foundation structure, refer to fig. 1 and fig. 2, including artifical long-pending soil layer 1 and flood layer 2, artifical long-pending soil layer 1 is located flood layer 2's top, when the construction, evenly interval distribution sets up a plurality of stake holes 3 on artifical long-pending soil layer 1 earlier, stake hole 3 can adopt the rig to excavate and form, the diameter 300mm-500mm of stake hole 3, the degree of depth at stake hole 3 is 1m-2m, put into stake pipe 4 in stake hole 3 earlier, the length of stake pipe 4 equals with the degree of depth of stake hole 3, the diameter of stake pipe 4 is less than the internal diameter 100mm-200mm of stake hole 3, erect stake pipe 4 and place in stake hole 3 to the center coincidence of stake pipe 4 and stake hole 3.

Referring to fig. 2 and 3, a plurality of threaded holes 41 are formed in the side wall of the pile tube 4, the threaded holes 41 are uniformly distributed along the circumferential direction of the pile tube 4, and a plurality of threaded holes are formed along the length direction of the pile tube 4, after the pile tube 4 is placed in the pile hole 3, the threaded holes 41 are internally threaded with the horizontal tube 5, one end of the horizontal tube 5 is connected with the threaded holes 41, the other end of the horizontal tube extends towards the inner wall of the pile hole 3, and the length direction of the horizontal tubes 5 is outwards diffused from the center of the pile tube 4.

Referring to fig. 2, a reinforcement cage 6 is placed in a gap between an outer wall of a pile hole 3 and an outer wall of a pile pipe 4, a concrete layer 7 is poured, the concrete layer 7 needs to be solidified and then constructed, during construction, a hole is drilled downwards along the length direction of the pile pipe 4, the length direction of the pile pipe 4 is vertically arranged, and the pile pipe 4 is externally provided with the solidified concrete layer 7, so that the straightness of the pile pipe 4 in the drilling process can be easily guaranteed, meanwhile, the drilled hole is in a vertical state, and the drilled hole diameter is equal to the diameter of the pile pipe 4. A grout tube 8 is inserted down pile tube 4. The length of the grouting pipe 8 is 7m-20 m.

Referring to fig. 1 and 3, a plurality of grouting holes 81 are opened on the side wall of the grouting pipe 8, and the grouting holes 81 on the grouting pipe 8 are distributed along the length direction of the grouting pipe 8, and are uniformly distributed along the circumference of the grouting pipe 8, the upper end of the grouting pipe 8 is located in the pile pipe 4, and the grouting holes 81 of the upper end of the grouting pipe 8 located in the pile pipe 4 are all corresponding to a horizontal pipe 5, a dividing plate 82 is arranged inside the grouting pipe 8, and the depth of the dividing plate 82 from the upper end of the grouting pipe 8 is less than 800m m. A first inner tube 83 and a second inner tube 84 are provided inside the grout pipe 8, the lower end of the first inner tube 83 is positioned above the dividing plate 82, the lower end of the second inner tube 84 extends downward beyond the dividing plate 82, and the lower end of the second inner tube 84 is welded to the dividing plate 82 so that the second inner tube 84 communicates with the lower side of the dividing plate 82.

Referring to fig. 1, cement slurry is poured into the first inner pipe 83, the cement slurry diffuses into the artificial soil layer 1 through the grouting holes 81 and the horizontal pipe 5, and then is solidified to form a first cement slurry layer 91, and the first cement slurry layer 91 is completely distributed in the artificial soil layer 1. When the first cement paste layer 91 reaches final setting, cement paste is injected into the second inner pipe 84, the pressure of the cement paste injected into the second inner pipe 84 is greater than that of the cement paste injected into the system inner pipe, after the cement paste is added into the second inner pipe 84, the cement paste can enter the artificial accumulated soil layer 1 and the flood layer 2 through the grouting hole 81 and is left in the grouting pipe 8 for solidification, the cement paste added into the second inner pipe 84 is solidified to form the second cement paste layer 92, due to the arrangement of the first cement paste layer 91, the second cement paste layer 92 can be distributed more widely, the filling is more compact, the geological enhancement on the artificial accumulated soil layer 1 and the flood layer 2 is improved, and the bearing capacity is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a backfill miscellaneous soil composite foundation structure, includes artifical long-pending soil layer (1) and flood layer (2), its characterized in that: the artificial accumulated soil layer (1) and the flood layer (2) are vertically inserted with grouting pipes (8), a plurality of grouting holes (81) are uniformly formed in the side walls of the grouting pipes (8), a dividing plate (82) is arranged in the middle of each grouting pipe (8) and located in the artificial accumulated soil layer (1), a first cement slurry layer (91) is formed above the dividing plate (82), a second cement slurry layer (92) is formed below the dividing plate (82), and the second cement slurry layer (92) is distributed inside each grouting pipe (8), the artificial accumulated soil layer (1) and the flood layer (2).

2. The backfill miscellaneous soil composite foundation structure of claim 1, wherein: a first inner pipe (83) and a second inner pipe (84) are connected to the upper portion of the dividing plate (82), the lower end of the first inner pipe (83) is located above the dividing plate (82), and the lower end of the second inner pipe (84) extends to the lower portion of the dividing plate (82).

3. The backfill miscellaneous soil composite foundation structure of claim 1 or 2, wherein: pile hole (3) have been seted up in artifical long-pending soil layer (1), be provided with in pile hole (3) stake pipe (4), the interval sets up between stake pipe (4) and stake hole (3) to it has concrete layer (7) to fill between stake pipe (4) and stake hole (3), the internal diameter of stake pipe (4) equals the external diameter of slip casting pipe (8).

4. The backfill miscellaneous soil composite foundation structure of claim 3, wherein: be provided with a plurality of horizontal pipes (5) on the outer wall of stake pipe (4), horizontal pipe (5) extend to in the inner wall of stake hole (3), horizontal pipe (5) are close to stake pipe (4) one end and slip casting hole (81) on slip casting pipe (8) and correspond the setting.

5. The backfill miscellaneous soil composite foundation structure of claim 4, wherein: threaded holes (41) are formed in the pile tube (4), and one end, close to the pile tube (4), of the horizontal tube (5) is in threaded connection with the pile tube (4) through the threaded holes (41).

6. The backfill miscellaneous soil composite foundation structure of claim 5, wherein: a plurality of said horizontal pipes (5) are distributed in a first cement paste layer (91) and a second cement paste layer (92).

7. The backfill miscellaneous soil composite foundation structure of claim 3, wherein: and a steel reinforcement cage (6) is arranged in the concrete layer (7).

8. The backfill miscellaneous soil composite foundation structure of claim 3, wherein: the length of the pile tube (4) is 1-2 m, and the length of the grouting tube (8) is 7-20 m.