CN215801568U

CN215801568U - Bored concrete pile structure for reducing filling coefficient in ultra-deep silt geology

Info

Publication number: CN215801568U
Application number: CN202120202087.6U
Authority: CN
Inventors: 向海保; 彭忠政
Original assignee: China 19th Metallurgical Corp
Current assignee: China 19th Metallurgical Corp
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2022-02-11
Anticipated expiration: 2031-01-25

Abstract

The utility model discloses a cast-in-place pile structure for reducing filling coefficient in ultra-deep silt geology. This application uses the steel reinforcement cage of iron sheet parcel bored concrete pile, the flow range of restriction concrete, the concrete that prevents to pour into steel reinforcement cage flows, make concrete placement at the within range of steel reinforcement cage and not fill the hole area of caving in, thereby the silt that the flow direction probably exists when solving underwater concrete placement problem in the area of caving in, reduce the actual use amount of concrete, reduce the size of filling coefficient, can also avoid caving in too greatly and influence foundation ditch basis construction scope.

Description

Bored concrete pile structure for reducing filling coefficient in ultra-deep silt geology

Technical Field

The utility model relates to the technical field of engineering construction, in particular to a filling pile structure for reducing filling coefficient in ultra-deep silt geology.

Background

The existing bored pile wet operation hole-forming protection method is slurry wall protection and local wall protection by increasing the length of a pile casing. However, in the ultra-deep silt geology, because silt fluidity is high and depth is difficult to control, only two methods of slurry wall protection and pile casing length increase are adopted, and the problem that filling coefficient is too large when pouring pile underwater concrete is generated. In the actual construction process, the deviation of pore-forming appearance is greater than the design size to and because reasons such as pile body lateral wall crack, hole and hole collapse can appear in the work progress, lead to the actual input to be greater than theoretical calculated volume, consequently filling coefficient is a quality index of judging pile foundation engineering. In ultra-deep silt geology, only the method of adopting the mud retaining wall and increasing the length of the retaining cylinder is adopted, so that when concrete is poured underwater, the concrete can flow to a silt collapse area which possibly exists, and in serious cases, the collapse is too large due to too much concrete flowing out, so that the foundation pit foundation construction range is influenced.

The above disadvantages need to be improved.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a filling pile structure for reducing filling coefficient in ultra-deep silt geology.

The technical scheme of the utility model is as follows:

the utility model provides a reduce bored concrete pile structure of sufficient coefficient in ultradeep silt geology, bored concrete pile include iron sheet outsourcing, steel reinforcement cage and inside concrete main part, the iron sheet outsourcing sets up steel reinforcement cage's outside, steel reinforcement cage is from inside to outside including location hoop, found muscle and spiral muscle, steel reinforcement cage includes the multisection unit cage body, welded connection between the unit cage body.

Foretell reduce bored concrete pile structure of filling coefficient in super dark silt geology, steel reinforcement cage interval a plurality of distances set up the location hoop.

Foretell bored concrete pile structure of filling coefficient in reduction super dark silt geology, steel reinforcement cage bottom shrink forms the round platform body, the diameter of round platform body bottom is than the diameter at round platform body top is 200 millimeters less.

Foretell reduce bored concrete pile structure of sufficient coefficient in ultradeep silt geology, the iron sheet outsourcing includes middle part cladding cortex and connects cladding cortex, unit cage body middle part surface sets up middle part cladding cortex, set up between the unit cage body connect cladding cortex, connect cladding cortex and connect one section respectively the unit cage body and next section the unit cage body.

Foretell reduce bored concrete pile structure of sufficient coefficient in extra-deep silt geology, the middle part of steel reinforcement cage sets up the grudging post, the grudging post with spiral muscle spot welding is connected, the location hoop with grudging post welded connection.

Foretell reduce bored concrete pile structure of sufficient coefficient in extra-deep silt geology, be provided with the main muscle on the grudging post and connect, the distribution of staggering in grudging post interval, on the same cross section of steel reinforcement cage main muscle connects quantity less than or equal to the 1/4 of grudging post quantity, just, on the same cross section of steel reinforcement cage the area that the main muscle connects is less than 25% of reinforcing bar total area.

According to the cast-in-place pile structure for reducing the filling coefficient in the ultra-deep silt geology, the pile position tolerance of the cast-in-place pile is less than or equal to 50 mm, and the verticality is less than or equal to 1/200.

The cast-in-place pile structure for reducing the filling coefficient in the ultra-deep silt geology is characterized in that the concrete main body is made of C30 or C35, and the reinforcement cage is made of HPB300 or HRB 400.

According to the scheme, the reinforcement cage of the cast-in-place pile is wrapped by the iron sheet, the flowing range of concrete is limited, the concrete poured into the reinforcement cage is prevented from flowing out, the concrete is poured within the range of the reinforcement cage and does not fill the hole collapse area, the problem that the concrete flows to the silt collapse area possibly existing in the underwater concrete pouring process is solved, the actual using amount of the concrete is reduced, the filling coefficient is reduced, and the problem that the foundation pit foundation construction range is influenced due to overlarge collapse can be avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a sectional view of section a-a in fig. 1.

Fig. 3 is a sectional view of section B-B in fig. 1.

Fig. 4 is a schematic structural diagram of another embodiment of the present invention.

Fig. 5 is a sectional view of section a-a in fig. 4.

Fig. 6 is a sectional view of section B-B in fig. 4.

Wherein, in the figures, the respective reference numerals:

1. a reinforcement cage; 2. wrapping the iron sheet; 3. erecting ribs; 4. a spiral rib; 5. the hoop is positioned.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "fixed" or "disposed" or "connected" to another element, it can be directly or indirectly located on the other element. The terms "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are only for convenience of description and not to be construed as limiting the technical solution. The meaning of "plurality" is two or more unless specifically limited otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

The utility model provides a reduce bored concrete pile structure of sufficient coefficient in ultradeep silt geology, as shown in fig. 1, the bored concrete pile includes iron sheet outsourcing 2, steel reinforcement cage 1 and inside concrete body, and steel reinforcement cage 1 is from inside to outside including location hoop 5, found muscle 3 and spiral muscle 4, and steel reinforcement cage 1 includes the multisection unit cage body, welded connection between the unit cage body.

As shown in fig. 1, the reinforcement cage 1 is divided into three sections, and the upper section and the lower section have the same structure. Spiral muscle 4 of steel reinforcement cage 1 spirals and forms the main part, and 1 interval a plurality of distances of steel reinforcement cage sets up positioning hoop 5, through the setting of positioning hoop 5 restriction spiral muscle 4, the middle section of steel reinforcement cage 1 sets up upright muscle 3, makes upright muscle 3 be connected with 4 spot welding of spiral muscle,

positioning hoop

5 and 3 welded connection of upright muscle to form and use spiral muscle 4, upright muscle 3 and positioning hoop 5 as the 1 middle section part of steel reinforcement cage of main part, as main part in the hole. The lower part of the pit bottom is a lower section of the reinforcement cage 1, the lower section of the reinforcement cage 1 is contracted to form a circular truncated cone, and the diameter of the bottom of the circular truncated cone is 200 mm smaller than that of the top of the circular truncated cone.

After the reinforcing cage 1 is formed, an iron sheet outer cover 2 is arranged outside the reinforcing cage 1 for coating. The iron sheet outsourcing 2 comprises a middle coating iron sheet layer and a connecting coating iron sheet layer, the middle coating iron sheet layer is arranged on the outer surface of the middle of the unit cage body, the connecting coating iron sheet layer is arranged between the unit cage bodies, and the connecting coating iron sheet layer is respectively connected with the upper unit cage body and the lower unit cage body.

In one embodiment, be provided with the owner muscle on the grudging post 3 and connect, the 3 interval distribution that staggers of grudging post, the owner muscle on the same cross section of steel reinforcement cage 1 connects quantity less than or equal to 1/4 of the 3 quantity of grudging post, and, the area that the owner muscle on the same cross section of steel reinforcement cage 1 connects is less than 25% of the reinforcing bar total area.

In one embodiment, the pile position tolerance of the cast-in-place pile is less than or equal to 50 mm, and the verticality is less than or equal to 1/200.

In one embodiment, the concrete body is made of C30 or C35, and the reinforcement cage 1 is made of HPB300 or HRB 400.

In an embodiment, as shown in fig. 1, 2 and 3, the diameter of the reinforcement cage 1 is 1200 mm, the front end of the reinforcement cage 1 is contracted, the diameter is 200 mm smaller than the diameter of the main body, the two ends are 100 mm smaller, and the contracted end is 500 mm long. The whole reinforcement cage 1 is formed by the spiral reinforcement 4 in a surrounding mode, the reinforcement diameter of the spiral reinforcement 4 at the lower portion of the reinforcement cage 1 is 12 mm, the interval between the spiral reinforcements 4 at the upper end and the lower end is 150 mm, the reinforcement diameter of the positioning hoop 5 is 18 mm, the interval between the upper positioning hoop 5 and the lower positioning hoop 5 is 1500 mm, and 13 vertical reinforcements 3 on the cross section of the reinforcement cage 1 are 32 mm; the diameter of the steel bar of the spiral rib 4 of the part in the pit is 12 millimeters, the interval of the spiral rib 4 at the upper end and the lower end is 100 millimeters, the diameter of the steel bar of the positioning hoop 5 is 18 millimeters, the interval of the upper positioning hoop 5 and the lower positioning hoop 5 is 1500 millimeters, the diameter of the vertical rib 3 on the cross section of the steel reinforcement cage 1 is 32 millimeters, totally 26, the structure extends to the bottom elevation of the tunnel, and the part above the bottom elevation of the tunnel is the same as the part below the steel reinforcement cage 1.

In another embodiment, as shown in fig. 4, 5 and 6, the diameter of the reinforcement cage 1 is 1200 mm, the front end of the reinforcement cage 1 is contracted, the diameter is 200 mm smaller than the diameter of the main body, the two ends are 100 mm smaller, and the contracted end is 500 mm long. The whole reinforcement cage 1 is formed by the spiral reinforcement 4 in a surrounding mode, the reinforcement diameter of the spiral reinforcement 4 at the lower portion of the reinforcement cage 1 is 12 mm, the interval between the spiral reinforcements 4 at the upper end and the lower end is 150 mm, the reinforcement diameter of the positioning hoop 5 is 18 mm, the interval between the upper positioning hoop 5 and the lower positioning hoop 5 is 1500 mm, and the diameter of the vertical reinforcement 3 on the cross section of the reinforcement cage 1 is 32 mm and 12 in total; the diameter of the steel bar of the spiral rib 4 of the part in the pit is 12 millimeters, the interval of the spiral rib 4 at the upper end and the lower end is 100 millimeters, the diameter of the steel bar of the positioning hoop 5 is 18 millimeters, the interval of the upper positioning hoop 5 and the lower positioning hoop 5 is 1500 millimeters, the diameter of the vertical rib 3 on the cross section of the steel reinforcement cage 1 is 32 millimeters, 24 pieces in total, the structure extends to the bottom elevation of the tunnel, and the upper part of the bottom elevation of the tunnel is the same as the lower part of the steel reinforcement cage 1. Concrete of the cast-in-place pile above the elevation of the tunnel bottom is grouted to be not less than 500 mm, the concrete strength of the stress key position of the pile body is ensured, and the pile body is dug out after being excavated to the corresponding elevation. And (5) backfilling the concrete with graded broken stones above the elevation of the concrete slurry.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a reduce bored concrete pile structure of sufficient coefficient in ultradeep silt geology, its characterized in that, bored concrete pile include iron sheet outsourcing, steel reinforcement cage and inside concrete main part, the iron sheet outsourcing sets up steel reinforcement cage's outside, steel reinforcement cage is from inside to outside including location hoop, founding muscle and spiral muscle, steel reinforcement cage includes the multisection unit cage body, welded connection between the unit cage body.

2. A bored pile structure to reduce the filling factor in ultra-deep silt geology according to claim 1, wherein said reinforcement cage is provided with said retaining hoops at intervals.

3. A bored concrete pile structure for reducing the filling factor in ultra-deep silt geology according to claim 1, wherein said reinforcement cage bottom is collapsed to form a truncated cone, the diameter of said truncated cone bottom being 200 mm smaller than the diameter of said truncated cone top.

4. A bored concrete pile structure for reducing the filling factor in ultra-deep silt geology according to claim 1, wherein said iron sheet outer covering includes a middle covering iron sheet layer and a connecting covering iron sheet layer, said middle covering iron sheet layer is disposed on the outer surface of the middle portion of said unit cage body, said connecting covering iron sheet layer is disposed between said unit cage bodies, and said connecting covering iron sheet layer connects the unit cage body of the previous section and the unit cage body of the next section, respectively.

5. A bored concrete pile structure for reducing the filling factor in ultra-deep silt geology according to claim 1, wherein said studs are provided in the middle of said reinforcement cage, said studs are spot-welded to said spiral ribs, and said positioning hoop is welded to said studs.

6. A bored pile structure for reducing filling factor in ultra-deep silt geology according to claim 1, wherein said studs are provided with main bar connectors, said studs are distributed in a staggered manner, the number of said main bar connectors on the same cross section of said reinforcement cage is less than or equal to 1/4 of the number of said studs, and the area of said main bar connectors on the same cross section of said reinforcement cage is less than 25% of the total area of said reinforcement.

7. A bored concrete pile structure for reducing the filling factor in ultra-deep silt geology according to claim 1, wherein the pile position tolerance of said bored concrete pile is 50 mm or less and the verticality is 1/200 or less.

8. A bored concrete pile structure for reducing the filling factor in ultra-deep silt geology according to claim 1, wherein said concrete body is made of C30 or C35, and said reinforcement cage is made of HPB300 or HRB 400.