CN214271993U

CN214271993U - Dry-type vibroflotation gravel pile for soft foundation treatment

Info

Publication number: CN214271993U
Application number: CN202022537772.2U
Authority: CN
Inventors: 王新泉
Original assignee: Zhejiang Shirun Jianchuang Technology Development Co Ltd
Current assignee: Shenzhen Jianan Group Co ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-09-24
Anticipated expiration: 2030-11-05

Abstract

The utility model relates to the technical field of foundation treatment, in particular to a dry vibroflotation gravel pile for soft foundation treatment, which has good bearing capacity, avoids foundation settlement and is beneficial to environmental protection; including sand bag crowd and gravel column, the sand bag crowd is located at the gravel column periphery, and sand bag crowd intermediate position is provided with crowded hole that expands, and the gravel column is installed inside crowded hole that expands, and the gravel column is formed by the broken stone segmentation vibration.

Description

Dry-type vibroflotation gravel pile for soft foundation treatment

Technical Field

The utility model relates to a technical field that the ground was handled specifically is a dry-type vibroflotation gravel pile for soft base is handled.

Background

The vibro-replacement stone-breaking pile is characterized in that a pile body consisting of stones is manufactured in a foundation by utilizing a construction process of a vibro-replacement method, and the pile body and original foundation soil jointly form a composite foundation so as to improve the bearing capacity of the foundation; the method is simple, convenient and quick in construction, and is an economical and reasonable technology for reinforcing loose and soft soil; however, the broken stones are directly contacted with the soft soil to generate shearing damage, so that the foundation settlement is caused, and the method wastes water resources by adopting a high-pressure water flushing method, forms a large amount of waste slurry, and is not beneficial to environmental protection.

At present, much research is carried out at home and abroad on how to make full use of and treat the soft foundation better for improving the strength of the soft foundation. The prior patent CN91215299.0 discloses a sand shell gravel pile, which is characterized in that a sand well is formed by using a immersed tube construction method, gravel is filled in the sand well to form a gravel core by using the immersed tube construction method, and the gravel of the gravel core is not in direct contact with a soil body, so that shearing damage is prevented; although the sand well and the gravel pile are combined to be applied, the common sand well is extruded through the steel sleeve to form the sand protective shell, good wrapping force cannot be provided for the gravel pile, and the gravel core is not compacted through vibration, so that the bearing capacity is limited, and the problems of foundation settlement and the like easily occur. Patent CN201410216197.2 provides a pilot hole implantation sack rubble slip casting pile and construction method, adopts the pilot hole implantation method, solves pile body necking down, bulging, hole collapse, mud pollution scheduling problem, improves the wholeness of structure, bearing capacity, reduces the settlement of pile body, accelerates to improve foundation bearing capacity, improves pile-forming quality. However, the prior art does not directly discuss and solve the problems that water resources are wasted to form a large amount of waste slurry in the manufacturing and construction process of the vibroflotation gravel pile, and the phenomena that the gravel is directly contacted with soft soil to generate shearing damage, cause foundation settlement and the like.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a dry-type vibroflotation gravel pile for soft base of bearing capacity is good, avoids the ground to subside and does benefit to the environmental protection.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: a dry-type vibroflotation gravel pile for soft foundation is handled, including sand bag crowd and gravel column, the sand bag crowd is located at the gravel column periphery, and sand bag crowd intermediate position is provided with crowded hole of expanding, the gravel column is installed inside crowded hole of expanding, and the gravel column is vibrated by the rubble segmentation and is formed, and sand bag crowd and gravel column top are equipped with the grit bed course.

Preferably, the sandbag group is formed by connecting one ends of a plurality of sandbags together and then binding the sandbags together by penetrating the sandbags through bag loops on the sandbags by using hemp ropes at certain intervals.

Preferably, the inside dry sand that blows is closely packed into of sand bag, and the sand bag sack is the state of tieing up.

Preferably, the squeezing and expanding holes are formed by inserting squeezing and expanding steel pipes into the bottom ends of the sand bag groups and then spirally pulling upwards.

Preferably, the paving thickness of the sand cushion layer is 30 cm.

(III) advantageous effects

Compared with the prior art, the utility model provides a dry-type vibroflotation gravel pile for soft base is handled possesses following beneficial effect:

1. according to the dry-type vibroflotation gravel pile for soft foundation treatment, the bagged sand well and the vibroflotation gravel pile process are combined to form a sand bag group in advance, the sand bag group can provide a certain wrapping force, then the pile is formed through vibration, settlement is effectively avoided, and the dry-type vibroflotation gravel pile is suitable for soft soil and ultra-soft soil foundations, and has remarkable technical advantages;

2. according to the dry vibroflotation gravel pile for soft foundation treatment, the gravel pile is formed by adopting a pile forming mode of dry vibroflotation, only vibration is carried out, and high-pressure water impact is not adopted, so that not only is water resource saved, but also the problem of treatment of waste slurry after the traditional vibroflotation gravel pile is formed is solved, and the environment is protected;

3. this a dry-type vibroflotation gravel pile for soft foundation is handled, at the gravel post pile-forming in-process, the sand material in the sand bag crowd has also obtained the extrusion closely knit, becomes the sand bag stake by the sand bag, so to a certain extent, has further promoted the bearing capacity promotion of dry-type vibroflotation gravel pile.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic perspective view of a sandbag cluster;

FIG. 4 is a schematic perspective view of the lowering of a group of sandbags;

FIG. 5 is a schematic view of a reamed hole formation;

FIG. 6 is a top view of a reamed hole;

FIG. 7 is a schematic illustration of a fragmented fabrication of a gravel column;

fig. 8 is a schematic view of pillar gravel formation.

In the figure: 1. soft foundation; 2. a sandstone cushion layer; 3. a group of sand bags; 4. a gravel column; 5. a sand bag; 6. hemp ropes; 7. sinking the pipe; 8. extruding and expanding a steel pipe; 9. a vibroflotation device; 10. extruding and expanding holes; 11. crushing stone; 12. the bag loop.

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 the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting.

Referring to fig. 1-8, a dry-type vibro-replacement gravel pile for soft foundation treatment comprises a sand bag group 3 and a gravel column 4, wherein the sand bag group 3 is arranged at the periphery of the gravel column 4, a bagged sand well is combined with the vibro-replacement gravel pile process to form the sand bag group in advance, the sand bag group can provide a certain wrapping force and then is vibrated to form the pile so as to effectively avoid settlement, a squeezing and expanding hole 10 is arranged at the middle position of the sand bag group 3, the gravel column 4 is arranged inside the squeezing and expanding hole 10, the gravel column 4 is formed by segmented vibration of gravel 11, the gravel pile is formed by a dry vibro-replacement pile-forming method, vibration is only carried out, high-pressure water impact is not adopted, water resources are saved, the problem of waste slurry treatment after the traditional vibro-replacement gravel pile is formed is solved, environmental protection is facilitated, a gravel cushion layer 2 is arranged at the tops of the sand bag group 3 and the gravel column 4, the sand bag group 3 is connected together by one end of a plurality of sand bags 5, then adopt rope made of hemp 6 to pass bag tong 12 on the sand bag 5 and bind together according to certain interval and make, sand bag 5 inside is closely knit to be filled with air-dried sand, and 5 sack of sand bag is for tying up the state, and at gravel post pile-forming in-process, the sand material in the sand bag crowd has also obtained the extrusion closely knit, becomes the sand bag stake by the sand bag, has further promoted the bearing capacity promotion of dry-type vibroflotation gravel pile, and crowded counterboring hole 10 inserts through crowded counterboring steel pipe and pulls out the formation to the bottom of sand bag crowd again spiral, and the thickness of paving of grit bed course 2 is 30 cm.

To sum up, when the dry vibroflotation gravel pile for soft foundation treatment is constructed, firstly, the immersed tube 7 with the valve pile tip is adopted, the immersed tube 7 is driven into the soft foundation 1 to a designed depth by a vibration method, the whole sand bag group 3 is lifted after the immersed tube is driven to finish, the end parts connected together are placed into the mouth of the immersed tube 7, then the tail of the sand bag group 3 is pulled to pass through the inlet roller of the immersed tube 7, the sand bag group 3 is stably and rapidly sent into the immersed tube 7, the sand bag group 3 is controlled to be slowly lowered to the bottom of the immersed tube 7, after the immersed tube 7 is placed, the sand bag group 3 is continuously and slowly and completely pulled out, the sand bag group 3 is left in the soft foundation 1, then the squeeze-expansion steel tube 8 is inserted into the center of the formed sand bag group 3 to the bottom end of the sand bag group 3, then the squeeze-expansion steel tube 8 is slowly and spirally pulled up, finally the squeeze-expansion hole 10 is formed, then the gravel 11 is put into the squeeze-expansion hole 10, and the amount of the gravel 11 is put in one time, controlling the height of the gravel pile to be about 0.5-1.0 m, lifting a vibroflot 9 by a crane to align with a squeezing hole 10 of a pile position, then putting the vibroflot 9 into the hole, starting the vibroflot 9, starting a dry vibroflot 11, setting a vibration-remaining time until a through-long gravel column 4 is formed, after compaction and reinforcement are completed, shoveling soil on the top surface of the pile, leveling the site, paving and compacting a 30cm gravel cushion layer 2, cutting off a sand bag group 3 higher than the cushion layer part, tying the bag mouth again, burying the sand bag group 3 exposed out of the ground into the gravel cushion layer 2, wherein the burying length is more than 30cm or meets the design requirement.

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 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

1. A dry-type vibroflotation gravel pile for soft foundation is handled which characterized in that: including sand bag crowd (3) and gravel column (4), sand bag crowd (3) are located at gravel column (4) periphery, and sand bag crowd (3) intermediate position is provided with crowded hole (10), install inside crowded hole (10) that expands in gravel column (4), and gravel column (4) are formed by rubble (11) segmentation vibration, sand bag crowd (3) and gravel column (4) top are equipped with grit bed course (2).

2. A dry vibro-replacement stone column for soft foundation treatment as claimed in claim 1, wherein: the sandbag group (3) is formed by connecting one ends of a plurality of sandbags (5) together and then binding the sandbags together by a hemp rope (6) penetrating through bag loops (12) on the sandbags (5).

3. A dry vibro-replacement stone column for soft foundation treatment as claimed in claim 1, wherein: the inside of the sand bag (5) is densely filled with air-dried sand, and the opening of the sand bag (5) is in a tightening state.

4. A dry vibro-replacement stone column for soft foundation treatment as claimed in claim 1, wherein: the squeezing hole (10) is formed by inserting a squeezing steel pipe into the bottom end of the sandbag group and then spirally pulling upwards.

5. A dry vibro-replacement stone column for soft foundation treatment as claimed in claim 1, wherein: the paving thickness of the sand cushion layer (2) is 30 cm.