CN213267821U - Air-extracting sleeve gravel pile composite foundation - Google Patents

Abstract

The utility model provides an air-extracting sleeve gravel pile composite foundation, which consists of an air-extracting sleeve gravel pile and soil between piles after vacuum preloading; the air-extracting sleeve gravel pile consists of a pile body water-permeable sleeve system, gravel and a pile cap; the pile body water-permeable sleeve system is formed by sleeving a perforated steel wire plastic sleeve into a pile body air exhaust system, and the perforated steel wire plastic sleeves are connected by sleeve joints; the pile body air exhaust system is formed by connecting a water permeable pile tip and a vertical air exhaust pipe.

Description

Air-extracting sleeve gravel pile composite foundation

Technical Field

The utility model relates to a ground treatment field, in particular to compound ground of casing pipe gravel pile bleeds is applicable to soft ground such as silt, mucky soil, fill out or fill out, and the treatment depth should be within 5-20m within range.

Background

Along with the development of cities, road traffic areas are improved continuously, various complex construction environments are often encountered in the construction process, and particularly, various soft foundations bring difficulties to construction. In order to reinforce soft foundations, composite foundations such as gravel piles, sand piles, muck piles and the like are widely applied at home and abroad. The traditional gravel pile is suitable for compacted and loose sandy soil, silt, plain filling soil and miscellaneous filling soil foundations, but cannot be well suitable for ultra-soft foundations such as silt, mucky soil, filling soil or dredger fill and the like, although a vacuum preloading method can be adopted, the required time is long, and the foundation consolidation effect is general.

Therefore, the air-extracting sleeve gravel pile composite foundation which is suitable for the ultra-soft foundation and has good consolidation effect and bearing capacity and the construction method thereof are very important.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a casing pipe gravel pile composite foundation that bleeds that is applicable to super soft foundation, and consolidates effect and bearing capacity is good.

This scheme provides a sleeve pipe rubble stake composite foundation bleeds, including a sleeve pipe rubble composite foundation bleeds, be applicable to and consolidate soft foundation and include: the air-extracting casing pipe gravel pile is inserted into the soft foundation, and the inter-pile soil is pre-pressed in vacuum and is arranged between the air-extracting casing pipe gravel piles; the air-bleed sleeve gravel pile is composed of a pile body water-permeable sleeve system and gravels poured into the pile body water-permeable sleeve system, the pile body water-permeable sleeve system comprises a pile body air-bleed system and perforated steel wire plastic sleeves sleeved outside the pile body air-bleed system, the perforated steel wire plastic sleeves are connected through sleeve joints, and the pile body air-bleed system is composed of a water-permeable pile tip and a vertical air-bleed pipe connected to the water-permeable pile tip and vertically arranged.

Compared with the prior art, the technical scheme has the following characteristics and beneficial effects:

(1) on the basis of traditional immersed tube gravel pile, the utility model discloses introduce in the pile body bleed and the foraminiferous sleeve pipe encloses and wraps up in the technique, make it applicable in soft ground, among the specially adapted super soft ground, technical advantage is showing.

(2) The utility model discloses with gravel pile and vacuum pre-compaction inter combination, not only can shorten the consolidation time of foundation soil, can also promote the bearing capacity of composite foundation, strengthen its soft base punishment effect, also shortened construction cycle to a certain extent, its technique and economic advantage are obvious.

(3) The utility model discloses not only carry out the evacuation at the earth's surface, can also be inside the evacuation of bleeding in the gravel pile, compare with single vacuum preloading technique, the utility model discloses strengthened the vacuum confining pressure effort to foundation soil, further promoted the shear strength of soil all around the pile.

Drawings

Figure 1 is a schematic view of a suction sleeve gravel pile composite foundation.

FIG. 2 is a plan layout view of a suction sleeve gravel pile composite foundation.

Figure 3 is a schematic view of a suction sleeve gravel pile.

Fig. 4 is a schematic view of a shaft water-permeable casing system.

Fig. 5 is a structural schematic diagram of the perforated steel wire plastic sleeve.

FIG. 6 is a schematic view of a shaft extraction system.

Fig. 7 is a schematic structural view of the water permeable pile tip.

Fig. 8 is a top view of fig. 7.

Fig. 9 is a cross-sectional view of the sinking pipe of the shaft water-permeable casing system.

Figure 10 is a cross-sectional view of the construction of a suction sleeve gravel pile.

Wherein: 1-soft foundation; 2-steel immersed tube; 3-fiber rope; 4-fixing the rod; 5-casing joint; 6-steel wire plastic sleeve with hole; 7-vertical exhaust pipe; 8-water permeable pile tip; 9-a limit lifting lug; 10-vertical water permeable holes; 11-lateral inclined permeable holes; 12-a cross positioning frame; 13-geotextile; 14-wire mesh; 15-open pore; 16-broken stone; 17-water permeable cushion layer; 18-pumping filter tube; 19-air extraction equipment; 20-air extraction casing gravel pile; 21-plastic drain board; 22-soil between piles.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purposes of limitation.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

The scheme provides an air-extracting casing gravel pile composite foundation and a construction method thereof, wherein the structure of the air-extracting casing gravel pile composite foundation is as follows:

the casing gravel pile composite foundation of bleeding is applicable to and consolidates soft foundation 1, includes at least: the air-extracting casing gravel pile 20 and the inter-pile soil 22, wherein the air-extracting casing gravel pile 20 is inserted into the soft foundation 1, the inter-pile soil 22 is pre-pressed in vacuum and is arranged between the air-extracting casing gravel piles 20, a plastic drainage plate 21 is inserted in the center of the inter-pile soil 22, and the plastic drainage plate 21 is inserted into the soft foundation 1;

in one embodiment of the present solution, plastic drainage plates 21 are spaced apart at locations between the inter-pile soils 22.

Air-bleed sleeve gravel pile 20 comprises the permeable sleeve system of pile body and rubble 16 of pouring into the permeable sleeve system of pile body, and the permeable sleeve system of pile body includes pile body air exhaust system and the trompil steel wire plastic casing 6 of cover setting outside the pile body air exhaust system, adopts bushing 5 to connect between the trompil steel wire plastic casing 6, and pile body air exhaust system comprises permeable pile point 8 and the vertical exhaust tube 7 of gas of connecting on permeable pile point 8 perpendicular setting.

The lower side part of the permeable pile tip 8 is designed into a conical shape so as to be beneficial to inserting the permeable pile tip 8 into the soft foundation 1; the upper side part of the permeable pile tip 8 is in a round table shape and is used for connecting the vertical exhaust pipe 7, the steel wire plastic sleeve 6 and the steel immersed tube 2.

The upper surface of the permeable pile tip 8 is pre-buried with a sleeve joint 5, a cross positioning frame 12 and a limiting lifting lug 9, the bottom of the vertical exhaust tube 7 is connected with the cross positioning frame 12 on the permeable pile tip 8, and specifically, the vertical exhaust tube 7 and the cross positioning frame 12 are connected and fixed through a rope fastener; the bottom of the perforated steel wire plastic sleeve 6 is connected with the sleeve joint 5 on the permeable pile tip 8, in addition, the steel immersed tube 2 is arranged on the permeable pile tip 8, the limiting lifting lug 9 and the embedded sleeve joint 5 limit the steel immersed tube 2 to the permeable pile tip 8 and are positioned on the side of the perforated steel wire plastic sleeve 6, the top of the perforated steel wire plastic sleeve 6 is fixed on a fixed rod 4 outside the steel immersed tube 2 through a fiber rope 3, and the fixed rod 4 is welded on the steel immersed tube 2.

Specifically, the vertical hole 10 that permeates water in center of 8 stake points of permeating water hole drill way pre-buried cross locating rack 12 to central point is the protruding annular bushing 5 of pre-buried ring of centre of a circle, and limit lug 9 is pre-buried to the avris position.

The position that corresponds cross locating rack 12 below in the stake point 8 that permeates water is equipped with communicating vertical hole 10 and the hole 11 that permeates water of incline, or, sets up cross locating rack 12 in vertical hole 10 drill way of permeating water, and wherein vertical hole 10 that permeates water sets up, and the hole 11 that permeates water of incline is relative vertical hole 10 that permeates water and is inclined setting and communicate with each other with the external world.

In addition, the length of the vertical extraction pipes 7 needs to exceed the length of the perforated steel wire plastic sleeves 6, and the vertical extraction pipes 7 on the gravel piles 20 of each extraction sleeve are respectively communicated with the extraction strainer 18 and connected into the extraction equipment 19.

The perforated steel wire plastic sleeve 6 is formed by arranging a steel wire mesh 14 between the inner and outer plastic sleeves with the perforations 15.

The tube body of the vertical exhaust tube 7 is provided with an opening 15, and the outer side of the vertical exhaust tube is wrapped with a layer of permeable geotextile 13.

The pile point 8 that permeates water is prefabricated concrete structure, and outward appearance parcel or paste the geotechnological cloth 13 that permeates water, and it sets up spacing lug 9 and bushing 5 to pre-bury in advance at the pile point 8 upper surface that permeates water during prefabrication, has set up vertical hole 10 that permeates water and the hole 11 that permeates water of side slope in inside, and the two link up each other to set up cross locating rack 12 in vertical hole 10 drill way of permeating water.

The permeable pile tip 8 is originally arranged on the soft foundation 1, and then the permeable pile tip 8 is arranged in the soft foundation 1 by utilizing the immersed tube pile driver to statically press and arrange the steel immersed tube 2. Combining plastic drainage plates 21 on soil 22 between piles, laying a sandstone permeable cushion layer 17 and a vacuum prepressing system on the ground surface, burying the plastic drainage plates 21 in a weak foundation and laying the sandstone permeable cushion layer 17 on the surface, then isolating the sandstone permeable cushion layer from the atmosphere by using an airtight sealing film, burying and pressing the end part of a sealing film, vacuumizing the film by using a vacuum pump to form negative pressure, preferably adopting a jet vacuum pump for vacuum prepressing, wherein the number of the vacuum pumps is determined according to the reinforcing area, and at least two vacuum pumps are required to be arranged in each reinforcing site.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.

Claims (9)

1. The utility model provides a casing gravel pile composite foundation bleeds, is applicable to and consolidates soft foundation (1), its characterized in that includes:

the air-extracting casing gravel pile (20) and the soil among the piles (22), wherein the air-extracting casing gravel pile (20) is inserted into the soft foundation (1), and the soil among the piles (22) is pre-pressed in vacuum and is arranged among the air-extracting casing gravel piles (20);

air exhaust sleeve gravel pile (20) comprises pile body water-permeable sleeve system and rubble (16) poured into the pile body water-permeable sleeve system, the pile body water-permeable sleeve system comprises a pile body air exhaust system and perforated steel wire plastic sleeves (6) sleeved outside the pile body air exhaust system, sleeve joints (5) are adopted between the perforated steel wire plastic sleeves (6) for connection, and the pile body air exhaust system comprises a water-permeable pile tip (8) and a vertical air exhaust pipe (7) connected to the water-permeable pile tip (8) and vertically arranged.

2. The air-extracting sleeve gravel pile composite foundation as claimed in claim 1, wherein the sleeve joint (5) and the cross positioning frame (12) are pre-embedded on the upper surface of the water-permeable pile tip (8), and the bottom of the vertical air-extracting pipe (7) is connected with the cross positioning frame (12) on the water-permeable pile tip (8); the bottom of the perforated steel wire plastic sleeve (6) is connected with a sleeve joint (5) on the water permeable pile tip (8), the steel immersed tube (2) is arranged on the water permeable pile tip (8) and is positioned at the side of the perforated steel wire plastic sleeve (6), the top of the perforated steel wire plastic sleeve (6) is fixed on a fixing rod (4) outside the steel immersed tube (2) through a fiber rope (3), and the fixing rod (4) is arranged at the upper end of the steel immersed tube (2).

3. A suction sleeve gravel pile composite foundation according to claim 2, wherein the vertical suction pipes (7) and the cross positioning frame (12) are connected and fixed by fasteners.

4. The air extraction sleeve gravel pile composite foundation as claimed in claim 2, wherein a cross-shaped positioning frame (12) is embedded in an orifice of a vertical water permeable hole (10) in the center of the water permeable pile tip (8), an annular sleeve joint (5) is embedded in a protruding mode by taking the center position as the center of a circle, and a limiting lifting lug (9) is embedded in the side position.

5. Air extraction sleeve gravel pile composite foundation according to claim 1, characterized in that the water permeable pile tip (8) is provided with vertical water permeable holes (10) and lateral inclined water permeable holes (11) at positions corresponding to the lower part of the cross-shaped positioning frame (12), wherein the vertical water permeable holes (10) are arranged vertically, and the lateral inclined water permeable holes (11) are arranged obliquely relative to the vertical water permeable holes (10) and are communicated with the outside.

6. An air-extracting casing gravel pile composite foundation according to claim 1, wherein the length of the vertical air-extracting pipe (7) exceeds that of the perforated steel wire plastic casing (6), and the air-extracting water filter pipe (18) connects the vertical air-extracting pipes (7) on each air-extracting casing gravel pile (20) and is connected into an air-extracting device (19).

7. A suction sleeve gravel pile composite foundation according to claim 1, wherein the perforated steel wire plastic sleeves (6) are formed by arranging steel wire meshes (14) between the plastic sleeves of the inner and outer layers of perforated holes (15).

8. Air extraction sleeve gravel pile composite foundation according to claim 1, characterized in that the body of the vertical extraction pipes (7) is provided with openings (15) and is wrapped with a layer of permeable geotextile (13).

9. Air extraction casing gravel pile composite foundation according to claim 1, characterized in that a plastic drainage plate (21) is inserted in the center of the inter-pile soil (22), and the plastic drainage plate (21) is inserted into the weak foundation (1).

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