CN218643407U

CN218643407U - Composite foundation for rocket hammer extrusion and expansion discrete material pile

Info

Publication number: CN218643407U
Application number: CN202222361963.7U
Authority: CN
Inventors: 张占奎; 杨明; 沈缤; 侯忠成; 赵凯强; 梁钦铠; 王瑞阳
Original assignee: Shandong Dingxin Geotechnical Technology Co ltd
Current assignee: Shandong Dingxin Geotechnical Technology Co ltd
Priority date: 2022-09-06
Filing date: 2022-09-06
Publication date: 2023-03-17
Anticipated expiration: 2032-09-06

Abstract

In order to solve the not good problem of foundation bearing capacity, the utility model provides a crowded hole enlargement bulk material pile composite foundation of rocket hammer, a serial communication port, including multiunit composite pile foundation, the even interval distribution of adjacent two sets of composite pile foundation, composite pile foundation includes the crowded reaming of rocket hammer, distributes at the inside rocket hammer real part and the column hammer tamp part of the crowded reaming of rocket hammer from bottom to top, the crowded hole enlargement of rocket hammer comprises expanding hole and the cylindrical crowded reaming of connecting in hole enlargement portion top, rocket hammer tamp part continuous distribution is in hole enlargement hole and the crowded reaming of certain depth, and rocket hammer tamp part is formed by rocket hammer tamp backfill, column hammer tamp part is formed by column hammer tamp lump stone or metalling, and in addition, multiunit composite pile foundation upper end still is provided with lime soil cushion layer or metalling, through the rubble portion of rocket pile foundation hammer and column hammer combination shaping and bottom, effectively improves the bearing capacity.

Description

Composite foundation for rocket hammer extrusion and expansion discrete material pile

Technical Field

The utility model relates to a construction technical field, in particular to compound ground of crowded diffusion bulk material stake of rocket hammer.

Background

The method is generally suitable for wet loess above the ground, the filling in holes of deep dynamic compaction piles and SDDC holes of deep super dynamic compaction piles are generally formed by adopting a rotary drilling rig or a long spiral drilling rig, the holes of the deep dynamic compaction piles are compacted by adopting a special heavy hammer, the foundation treatment depth is larger than that of the dynamic compaction, but the construction quality cannot be ensured when the groundwater is higher, so the method is generally suitable for the wet loess above the ground, the filling in the holes generally adopts 8978 zxft Water level, and the use range is limited.

Disclosure of Invention

In order to solve the problem, the utility model provides a crowded diffusion bulk material stake composite foundation of rocket hammer adopts technical scheme as follows:

the composite foundation is characterized by comprising a plurality of groups of composite pile foundations, wherein two adjacent groups of composite pile foundations are distributed at equal intervals, each composite pile foundation comprises a rocket hammer squeezing hole, a rocket hammer tamping part and a column hammer tamping part, the rocket hammer squeezing hole and the column hammer tamping part are distributed in the rocket hammer squeezing hole from bottom to top, each rocket hammer squeezing hole is composed of a diameter expanding hole and a cylindrical squeezing hole connected to the upper portion of the diameter expanding part, the rocket hammer tamping parts are continuously distributed in the diameter expanding holes and squeezing holes with certain depth, each rocket hammer tamping part is formed by tamping backfill materials with a rocket hammer, each column hammer tamping part is formed by tamping blocks or broken stones with a column hammer, and in addition, an ash soil cushion layer or a broken stone layer is further arranged at the upper end of each group of composite pile foundations.

Preferably, the multiple groups of composite pile foundations are distributed in a square or quincunx shape.

Preferably, the diameter of the expanding hole is 1.5 to 2 times of that of the cylindrical extruding and expanding hole.

Preferably, the distance between adjacent composite pile foundations is 2-3 times of the diameter of the cylindrical extrusion reaming hole.

Preferably, the height of the ramming real part of the column hammer is 2-3 m.

The beneficial effects of the utility model reside in that:

1. the expanding part at the lower end of the composite pile foundation forms a bearing layer at the bottom of the pile, so that the upper load is effectively transmitted to the better bearing layer through the pile and the expanding part below the pile, and the bearing capacity of the pile is improved;

2. when the construction is carried out in a slightly collapsible loess stratum with a relatively small thickness, lime soil cushion layers can be paved at the upper ends of the multiple groups of composite pile foundations to play a role in water isolation, and when the construction is carried out in stratums such as miscellaneous filling, weak and liquefaction, gravel layers can be paved at the upper ends of the multiple groups of composite pile foundations to improve the integral bearing capacity of the composite foundation;

3. the composite foundation has the advantages of small construction vibration, obvious compaction effect of soil around the pile, large treatment depth, effective improvement of foundation bearing capacity, uniform integral rigidity of the composite foundation, and use of broken bricks and tiles, concrete blocks, building muck, industrial waste residues and the like as backfill materials, thereby providing cheap raw materials for foundation treatment, changing waste into valuable and reducing engineering cost.

Drawings

FIG. 1 is a schematic view of the structure of the present invention

FIG. 2 is a schematic diagram of the distribution of multiple sets of composite pile foundations

Wherein: 1-rocket hammer extruding and expanding hole, 101-diameter expanding hole, 102-cylindrical extruding and expanding hole, 2-rocket hammer ramming real part, 3-column hammer ramming real part, 4-lime soil layer and 5-foundation pit.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The rocket hammer squeezing and expanding bulk material pile composite foundation shown in fig. 1-2 comprises a plurality of groups of composite pile foundations and a soil cement cushion layer 4 positioned at the upper end of the plurality of groups of composite pile foundations, the plurality of groups of composite pile foundations are distributed in a square shape, the interval distance between two adjacent groups of composite pile foundations is b, the composite pile foundations comprise a rocket hammer squeezing and expanding hole 1, a rocket hammer tamping part 2 and a column hammer tamping part 3, the rocket hammer squeezing and expanding hole 1 is composed of an expanding hole 101 and a cylindrical squeezing and expanding hole 102 connected above the expanding hole 101, the expanding hole 101 is of a partially spherical hole-shaped structure, the diameter of the rocket hammer tamping part is D, the diameter of the cylindrical squeezing and expanding hole 102 is D, D is 0.8-1.5 m, the diameter of the expanding hole 101 is D = 1.5-2D, the rocket hammer tamping part 2 is positioned inside the expanding hole 101 and the cylindrical squeezing and expanding hole 102, the depth of the rocket hammer tamping part 2 is h in the cylindrical squeezing and the rocket hammer tamping part 102, the rocket hammer tamping filler is obtained by tamping the ramming the soil cement hammer tamping part 2, the soil cement hammer tamping part 2 is positioned above the cylindrical squeezing and the column hammer tamping part 3, the adjacent groups of the building hammer tamping blocks are compacted and the column hammer tamping part 3, the soil cement hammer tamping part is formed by the column hammer tamping part 3 or the column hammer tamping part of the cylindrical ramming pile foundations at any time.

In this embodiment, the composite foundation of the rocket hammer extrusion-expansion discrete material pile can adopt the following construction method:

firstly, a rocket hammer is utilized to freely fall to form L + H depth in a rocket hammer squeezing hole 1, then a certain amount of backfill is poured into the bottom in a pile hole, the rocket hammer is utilized to impact the pile hole to L + H depth again, the tamping of the backfill is repeated until the penetration degree meets the requirement, an expanding part with the diameter of D is formed at the pile end, then the backfill is continuously poured into the pile hole and tamped by the rocket hammer until the height of H + H, then rock blocks or broken stones are poured into the pile hole, the tamping is carried out by a column hammer until the bottom surface of a foundation pit 5, after the construction of a plurality of groups of composite pile foundations is finished, a lime soil cushion layer 4 with a certain thickness is paved at the pile top, the lime soil cushion layer 4 is applied to a thin slightly-collapsible loess stratum, the water-resisting effect can be achieved, naturally, when the composite foundation is filled, weak, liquefied and the like, high-strength hammer materials such as the rock blocks and broken stones can be paved at the pile top, and tamped by the column, and finally the composite foundation expanding body of the rocket hammer is formed as shown in a diagram 1 and a diagram 2.

The integral composite foundation has small construction vibration, obvious compaction effect of soil around the pile, large treatment depth, pile diameter of 0.8-1.5 m, 3-9 times higher bearing capacity than the original foundation, uniform integral rigidity, and wide application in the fields of highways, industrial and civil buildings, etc.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements can be made, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a crowded diffusion bulk material stake composite foundation of rocket hammer, its characterized in that includes multiunit composite pile foundation, the even interval distribution of adjacent two sets of composite pile foundation, composite pile foundation includes the crowded reaming of rocket hammer, distributes inside the crowded reaming of rocket hammer and the real part of column hammer rammer from bottom to top, the crowded reaming of rocket hammer comprises expanding hole and the cylindrical crowded reaming of connecting in hole enlargement portion top, rocket hammer rammer portion distributes in hole enlargement hole and the crowded reaming of certain degree of depth in succession, rocket hammer rammer portion is formed by rocket hammer rammer backfill, column hammer rammer real part is formed by column hammer rammer lump stone or rubble, in addition, multiunit composite pile foundation upper end still is provided with lime soil bedding course or rubble layer.

2. The rocket hammer extrusion bulk material pile composite foundation according to claim 1, wherein the multiple groups of composite pile foundations are distributed in a square or quincunx shape.

3. The rocket hammer extruded bulk material pile composite foundation according to claim 1, wherein the diameter of the diameter expanding hole is 1.5-2 times of the diameter of the cylindrical extruded diameter expanding hole.

4. The rocket hammer extruded bulk material pile composite foundation according to claim 1, wherein the distance between adjacent composite pile foundations is 2-3 times of the diameter of the cylindrical extruded hole.

5. The rocket hammered bulk material pile composite foundation according to claim 1, wherein the height of the rammed part of the column hammer is 2-3 m.