阅读说明：本技术 一种结构补强的钢立柱桩 (Steel upright pile with reinforced structure ) 是由 石海军 刘彩霞 孙孝智 刘平 倪代俊 于 2021-06-30 设计创作，主要内容包括：本发明涉及一种结构补强的钢立柱桩,包括混凝土立柱桩和钢格构,所述钢格构下端插入所述混凝土立柱桩中,形成钢格构锚固段,所述混凝土立柱桩的中心设有钻孔,所述钻孔从混凝土立柱桩的桩顶开始向桩内延伸,且该钻孔的深度大于所述钢格构锚固段的深度,所述钻孔内部固定设有钢管,所述钢管的上端部与所述钢格构的上端部平齐。本发明通过在混凝土立柱桩增设一根用于补强的钢管,提高了原有的钢立柱桩结构强度,获得优化后的钢立柱桩,为栈桥板提供强有力的支撑,为大型作业车运输深基坑的泥土提供安全可靠的出土路线,满足新出土方式对于栈桥板承载力的需求。(The invention relates to a steel upright post pile for structural reinforcement, which comprises a concrete upright post pile and a steel lattice, wherein the lower end of the steel lattice is inserted into the concrete upright post pile to form a steel lattice anchoring section, a drill hole is arranged in the center of the concrete upright post pile, the drill hole extends from the pile top of the concrete upright post pile to the inside of the pile, the depth of the drill hole is greater than that of the steel lattice anchoring section, a steel pipe is fixedly arranged in the drill hole, and the upper end of the steel pipe is flush with the upper end of the steel lattice. According to the invention, the steel pipe for reinforcement is additionally arranged on the concrete upright pile, so that the structural strength of the original steel upright pile is improved, the optimized steel upright pile is obtained, a powerful support is provided for the trestle plate, a safe and reliable unearthing route is provided for a large-scale operation vehicle to transport soil of a deep foundation pit, and the requirement of a new unearthing mode on the bearing capacity of the trestle plate is met.)

1. A steel upright post pile for structure reinforcement comprises a concrete upright post pile and a steel lattice, the lower end of the steel lattice is inserted into the concrete upright post pile to form a steel lattice anchoring section, and is characterized in that,

the center of concrete column pile is equipped with the drilling, the drilling begins to extend to the stake from the pile bolck of concrete column pile, and the degree of depth of this drilling is greater than the degree of depth of steel lattice anchor section, the inside fixed steel pipe that is equipped with of drilling, the upper end of steel pipe with the upper end parallel and level of steel lattice.

2. A structurally reinforced steel stud according to claim 1 wherein the central axis of the steel tube is aligned with the central axis of the bore and a gap is left between the outer side wall of the steel tube and the inner wall of the bore.

3. A structurally reinforced steel stud according to claim 1, wherein the lower end of the steel tube is fixedly connected to the concrete stud by grout injection.

4. A structurally reinforced steel stud according to claim 1, wherein the steel tube is welded to the steel lattice at a portion thereof above the concrete stud by a connecting steel plate.

5. A structurally reinforced steel stud according to claim 1, wherein a plurality of detachably connected guide and positioning retaining sleeves are provided between the steel tube and the steel lattice, and the guide and positioning retaining sleeves are stacked one above the other and all located above the concrete stud.

6. A structurally reinforced steel stud according to claim 5 wherein the guide and location casing comprises a casing body and a plurality of guide and location plates, four guide and location plates being provided at each end of the casing body, and four guide and location plates on the same side being aligned one-to-one with the four angles of the steel lattice.

7. A structurally reinforced steel stud according to claim 6 wherein there is a gap between the outer side edges of the guide and locator plates and the angle iron.

8. A structurally reinforced steel stud according to claim 6, wherein the guide location plate is in the shape of an isosceles trapezoid, and the long base of the trapezoidal guide location plate is welded to the casing body.

9. A structurally reinforced steel stud according to claim 1, wherein the outer side of the upper end of the steel tube is provided with a plurality of anti-slip reinforcing bars, the anti-slip reinforcing bars being in contact connection with the cross bracing beams of the trestle plates.

10. A structurally reinforced steel stud according to claim 1 wherein the steel lattice comprises four angles and a gusset connecting two adjacent angles, the four angles opening towards the centre of the steel lattice, the outer corners of the angles being welded to the longitudinal bars of the outer cage.

Technical Field

The invention relates to the field of earthwork construction of deep foundation pits, in particular to a steel upright pile for structure reinforcement.

Background

A construction project close to the harbor territory sea area comprises apartment houses, offices, commercial skirt buildings, public supporting and the like, has two underground layers, and the underground construction area exceeds 6 ten thousand square meters, so that large-area deep foundation pit excavation is required. The project has been suspended and set aside for years for some reason, but has previously completed part of the steel stud piles used to support the deck slab and excavated part of the deep foundation pit.

Because the dead time of the project is long, the surrounding construction planning is greatly changed, for example, the east side of the project is a deep foundation pit of a tunnel under construction, etc., a subway tunnel exists near the south side, and the north side is close to a water transportation river channel. On the other hand, re-evaluation finds the originally designed unearthed mode: the excavating machinery and the earthwork vehicle are all arranged in the foundation pit for earthwork excavation, the influence on the soil geology of the area is large, and the large-scale vehicle in the downhill process can cause the extrusion deviation of the engineering pile and the creeping of the foundation pit soil layer.

Therefore, new ways of unearthing need to be changed and adopted: the small excavator excavates and transports to be close to the trestle plate in the foundation pit, then utilizes the long arm excavator off-position on the trestle plate, and the earthwork that is close to in the foundation pit is shipped to the car, and the outer earthwork of carrying on by the trestle plate again, so need increase the trestle plate so that lead to the traffic. However, evaluation finds that the structural strength of the original steel upright pile is not enough, reinforcement needs to be performed on the basis of the original steel upright pile structure, and the optimized steel upright pile is obtained, so that the defects of the existing steel upright pile are overcome, and the requirement of a new unearthing mode on the bearing capacity of the stacked bridge plate is met.

The above problems are worth solving.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a steel upright pile with reinforced structure.

The technical scheme of the invention is as follows:

the utility model provides a steel column pile of structure reinforcement, includes concrete column pile and steel lattice, the steel lattice lower extreme inserts in the concrete column pile, form steel lattice anchor section, the center of concrete column pile is equipped with drilling, the drilling begins to extend to the stake from the pile bolck of concrete column pile, and the degree of depth of this drilling is greater than the degree of depth of steel lattice anchor section, the inside fixed steel pipe that is equipped with of drilling, the upper end of steel pipe with the upper end parallel and level of steel lattice.

The invention according to the above aspect is characterized in that the depth of the steel lattice anchoring section is 3 meters, and the depth of the drilled hole is 5 meters.

The invention according to the above aspect is characterized in that the central axis of the steel pipe is aligned with the central axis of the bore, and a gap is left between the outer side wall of the steel pipe and the inner wall of the bore.

Further, the aperture of the drilling hole is 275 mm, and the outer diameter of the steel pipe is 194 mm.

The invention according to the scheme is characterized in that the lower end of the steel pipe is provided with a plurality of slurry outlet holes.

According to the invention of the scheme, the lower end part of the steel pipe is fixedly connected with the concrete upright post pile through grouting of cement paste.

According to the invention of the scheme, the part of the steel pipe, which is positioned above the concrete upright post pile, and the steel lattice are welded and fixed through the connecting steel plate.

The invention according to the scheme is characterized in that a plurality of detachably connected guiding and positioning pile casings are arranged between the steel pipe and the steel lattice, and the guiding and positioning pile casings are stacked up and down and are all positioned above the concrete upright pile.

Further, the guide positioning protects a section of thick bamboo and includes a section of thick bamboo main part and a plurality of direction locating plate, the both ends that protect a section of thick bamboo main part all are equipped with four direction locating plate, and with the four on one side direction locating plate with four angle steel one-to-one of steel lattice aligns.

Furthermore, a gap is reserved between the outer side edge of the guide positioning plate and the angle steel.

Furthermore, the distance of the gap between the outer side edge of the guide positioning plate and the angle steel is 7.5 mm.

Further, the guide positioning plate faces the axis of the casing main body.

The invention according to the scheme is characterized in that the guide positioning plate is in an isosceles trapezoid shape, and the long bottom edge of the trapezoid guide positioning plate is welded with the pile casing main body.

Furthermore, at least one end of the casing main body is provided with a hoisting hole.

Furthermore, the short bottom edge of the trapezoidal guide positioning plate is an arc edge.

Furthermore, the chord length of the arc-shaped side is 60 mm.

Furthermore, the included angle between the two side edges of the trapezoidal guide positioning plate and the long bottom edge is 45 degrees.

Further, the distance from the guide positioning plate to the end face of the casing main body is 50 mm.

Furthermore, the outer diameter of the casing main body is 352mm, and the wall thickness is 8 mm.

The invention according to the scheme is characterized in that a plurality of anti-skidding reinforcing steel bars are arranged on the outer side face of the upper end of the steel pipe, and the anti-skidding reinforcing steel bars are in contact connection with the cross support beam of the trestle plate.

The steel lattice structure is characterized by comprising four angle steels and a gusset plate for connecting two adjacent angle steels, wherein the openings of the four angle steels face to the axis of the steel lattice structure, and the outer side angles of the angle steels are welded with longitudinal ribs of an external reinforcement cage.

The invention according to the scheme is characterized in that the four angle steels of the steel lattice are all welded with first water stop plates in a surrounding manner, the steel pipe is welded with second water stop plates in a surrounding manner, the four first water stop plates are positioned on the same plane, and the first water stop plates and the second water stop plates are close to the top of the concrete upright and staggered up and down.

The invention according to the scheme has the advantages that:

according to the invention, the steel pipe for reinforcement is additionally arranged on the concrete upright pile, so that the structural strength of the original steel upright pile is improved, the optimized steel upright pile is obtained, a powerful support is provided for the trestle plate, a safe and reliable unearthing route is provided for a large-scale operation vehicle to transport soil of a deep foundation pit, and the requirement of a new unearthing mode on the bearing capacity of the trestle plate is met.

Drawings

FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram according to a second embodiment of the present invention;

FIG. 3 is a schematic structural view of a guiding and positioning casing according to the present invention;

FIG. 4 is a schematic structural view of the combined angle iron of the present invention;

FIG. 5 is a top view of the composite angle iron of the present invention;

FIG. 6 is a schematic structural view of a first water stop plate according to the present invention;

FIG. 7 is a schematic structural view of a second water stop plate according to the present invention;

FIG. 8 is a flowchart of a method according to a first embodiment of the present invention;

FIG. 9 is a flowchart of a method according to a second embodiment of the present invention.

In the figure, 1, a concrete upright pile; 11. drilling;

2. a steel lattice; 21. a steel lattice anchoring section; 22. angle steel; 23. a batten plate; 24. a first water stop plate;

201. a first angle steel; 202. a second angle steel; 203. welding angle steel; 2031. chamfering the back edges; 204. welding a seam;

3. a steel pipe; 31. anti-skid steel bars; 32. a second water stop plate;

4. guiding and positioning protective cylinders; 41. a casing main body; 42. guiding a positioning plate; 43. hoisting holes;

5. a cross support beam;

6. and connecting the steel plates.

Detailed Description

For better understanding of the objects, technical solutions and effects of the present invention, the present invention will be further explained with reference to the accompanying drawings and examples. Meanwhile, the following described examples are only for explaining the present invention, and are not intended to limit the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution.

The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically defined otherwise.

Example one

As shown in fig. 1, a steel column pile of structural reinforcement, including concrete column pile 1 and steel lattice 2, steel lattice 2 lower extreme inserts in concrete column pile 1, forms steel lattice anchor section 21, and the center of concrete column pile 1 is equipped with vertical drilling 11, and drilling 11 begins to extend to the stake in from the pile bolck of concrete column pile 1, and the degree of depth of this drilling 11 is greater than the degree of depth of steel lattice anchor section 21, and drilling 11 is inside to be fixed and is equipped with steel pipe 3, the upper end of steel pipe 3 and the upper end parallel and level of steel lattice 2.

In this embodiment, the depth of steel lattice anchor section 21 is 3 meters, and the depth of drilling 11 is 5 meters, and the depth of drilling 11 is greater than the depth of steel lattice anchor section 21 for the depth that steel pipe 3 inserted concrete upright pile 1 is greater than the depth of steel lattice anchor section 21, and after steel pipe 3 and steel lattice 2 fixed connection, steel pipe 3 becomes the anchor of steel lattice 2 center department and participates in, increases the length of steel pipe 3, does benefit to and promotes steel lattice 2 and concrete upright pile 1 anchor intensity.

The lower tip of steel pipe 3 and concrete column pile 1 fill fixed connection through the grout, the center pin of steel pipe 3 aligns with the center pin of drilling 11, and leave the clearance between the lateral wall of steel pipe 3 and the inner wall of drilling 11, in this embodiment, the aperture of drilling 11 is 275 millimeters, the external diameter of steel pipe 3 is 194 millimeters, sufficient clearance width does benefit to the cement thick liquid volume that increases clearance department, thereby make the parcel sufficient at the outside concrete thick liquid of steel pipe 3, with the inside grout cooperation of steel pipe 3, further promote the firm in connection degree.

The part of the steel pipe 3 above the concrete upright pile 1 and the steel lattice 2 are welded and fixed through a connecting steel plate 6. Therefore, the optimized steel upright post pile comprises an upper reinforcing structure and a lower reinforcing structure, wherein the lower part of the steel upright post pile consists of: the concrete upright pile 1 is simultaneously connected with the steel pipe 3 and the steel lattice 2 in an anchoring way, and the upper part of the concrete upright pile is composed of: the steel pipe 3 and the steel lattice 2 are welded and fixed to form a whole, the steel pipe is vertically communicated, and the structural strength of the center inside the structure is improved.

The lower end of the steel pipe 3 is provided with a plurality of grout outlet holes, so that the grout outlet speed of the grout in the steel pipe is improved. The lateral surface of the upper end of the steel pipe 3 is provided with a plurality of anti-skid steel bars 31, and the anti-skid steel bars 31 are in contact connection with the cross support beam 5 of the trestle plate. The anti-slip reinforcing bars 31 are used to increase the friction force when the steel pipe 3 is connected to the cross support beam 5, thereby reinforcing the firmness of connection between the steel pipe 3 and the cross support beam 5.

In this embodiment, the steel lattice 2 includes four angle steels 22 and a gusset plate 23 connecting two adjacent angle steels 22, openings of the four angle steels 22 face an axis of the steel lattice 2, and outer corners of the angle steels 22 are welded to longitudinal bars of an external reinforcement cage, so that the structural strength of the steel lattice 2 above is further enhanced.

As shown in fig. 6 and 7, the four angle steels 22 of the steel lattice 2 are all welded with the first water stop plates 24, the elevations of the four first water stop plates 24 are located on the same plane, the steel pipe 3 is welded with the second water stop plate 32, and the first water stop plates 24 and the second water stop plates 32 are close to the top of the concrete upright and staggered up and down. First stagnant water board and second stagnant water board make steel pipe and lattice column surface all form the platform of outside extension, have solved groundwater effectively along the problem of steel surface infiltration upwards, prolong the life of steel upright post stake.

As shown in fig. 8, in order to obtain the steel stud pile with reinforced structure according to the first embodiment, a method for reinforcing the structure of a steel stud pile is provided, which includes the following steps:

and S1, treating the soil body in the steel lattice.

And cleaning mud blocks in the steel lattice 2 by using a high-pressure pump and a rotary jet drilling machine, and changing the solid mud into mud liquid, wherein the model of the high-pressure pump is GPB-90B, and the model of the rotary jet drilling machine is MGJ-50A. The lower end part of the steel lattice 2 is inserted into the concrete upright post pile 1 and is solidified and combined with the concrete upright post pile 1 to form an anchoring area, and the concrete layer at the anchoring area is hard; and the part of the upper part of the steel lattice 2 which is not inserted into the concrete upright post pile 1 is wrapped by a soil layer, wherein the soil layer is sand, solid mud and the like and can be dispersed by high-pressure water, so that when the high-pressure rotary jet water drill is used for cleaning, only the part of the steel lattice 2 which is not inserted into the concrete upright post pile 1 is subjected to internal soil body treatment.

And step S2, cleaning the steel lattice.

And pumping out and cleaning the mud liquid treated in the steel lattice 2. In the embodiment, a single-phase screw rod submersible electric pump is adopted for pumping, discharging and cleaning, and the model of the single-phase screw rod submersible electric pump is QGD 3.5-150-1.5. After the steel lattice 2 is cleaned up, the drill bit of the drilling machine in the subsequent step can be conveniently lowered.

And S3, forming holes in the concrete upright post pile.

And a drill bit of the drilling machine penetrates through the cleaned steel lattice 2 from top to bottom to reach the top of the concrete upright pile 1, and drills the concrete upright pile 1, wherein the hole diameter of the drilled hole 11 is 275 mm, and soil residues in the drilled hole 11 of the concrete upright pile 1 are cleaned. The drilling depth of the drilling machine in the concrete upright pile 1 is greater than the anchoring depth of the steel lattice 2 in the concrete upright pile 1, and further, the drilling depth is at least 2 meters greater than the anchoring depth, in the embodiment, the anchoring length of the steel lattice 2 and the concrete upright pile 1 is 3 meters, and the depth of the drilling hole 11 is 5 meters.

And step S4, placing a steel pipe in the hole.

And (3) inserting the steel pipe 3 into the steel lattice 2 by using a crane, inserting the steel pipe into the drill hole 11 of the concrete upright pile 1, aligning the central shaft of the steel pipe 3 with the central shaft of the drill hole 11, and leaving a large gap between the steel pipe 3 and the inner wall of the drill hole 11, wherein the width of the gap is not less than 30 mm.

In this example, the steel pipe 3 has an outer diameter of 194 mm and a wall thickness of 10 mm, while the bore diameter of the bore hole 11 is 275 mm, and the clearance between the steel pipe 3 and the inner wall of the bore hole 11 is 40.5 mm.

And step S5, grouting in the steel pipe.

And (3) the high-pressure grouting head extends into the steel pipe 3 for grouting, and normal portland cement with the water-cement ratio of 0.55 and P.O42.5 is adopted during grouting to the orifice elevation, namely the pile top of the concrete upright pile 1. In the grouting process, cement paste flows from a gap at the bottom of the steel pipe 3 to the outside of the steel pipe 3, the whole drilled hole 11 is filled from bottom to top, grouting is stopped when the cement paste reaches the hole opening, and standing and maintaining are carried out for 12 hours, so that the placed steel pipe 3 and the concrete upright post pile 1 are fully and fixedly combined.

And S6, reinforcing the steel pipe and the steel lattice.

Inside concrete upright pile 1, steel pipe 3 and steel lattice 2 are all fixed through the mode that grout solidifies, and in concrete upright pile 1's top, are connected through steel connection plate 6 between steel pipe 3 and the steel lattice 2, when connecting, weld steel pipe 3 and steel lattice 2's angle steel 22, and in this embodiment, the steel connection plate size of adoption is 200mm 8mm, and is that length, width are 200 millimeters, and thickness is 8 millimeters.

According to the invention, the steel pipe 3 for reinforcement is additionally arranged on the concrete upright post pile 1, so that the structural strength of the original steel upright post pile is improved, the optimized steel upright post pile is obtained, a powerful support can be provided for a trestle plate, a safe and reliable unearthing route is provided for a large-scale operation vehicle to transport soil of a deep foundation pit, and the requirement of a new unearthing mode on the bearing capacity of the trestle plate is met.

The following are found in the reinforcing construction process: when the drill bit of rig arrives behind the top of concrete column pile and drills concrete column pile, has the problem of boring the in-process card brill, through reconnaissance analysis, learns that the steel lattice has taken place the off normal for should the slope of perpendicular decurrent steel lattice down originally, hit on the angle steel or the batten plate of steel lattice when the drill bit creeps into, lead to the pore-forming inefficiency.

Example two

As shown in fig. 2, in order to solve the problem of low porosity in the above method, the present embodiment provides an optimized structure-reinforced steel stud pile, which has a structure different from that of the first embodiment in that: be equipped with a plurality of detachable direction location between steel pipe 3 and the steel lattice 2 and protect a section of thick bamboo 4, a plurality of direction location protect a section of thick bamboo 4 and stack from top to bottom, and be located 1 tops of concrete upright post pile.

As shown in fig. 3, the guiding and positioning pile casing 4 includes a pile casing main body 41 and a plurality of guiding and positioning plates 42, the outer diameter of the pile casing main body 41 is 352mm, the wall thickness is 8mm, four guiding and positioning plates 42 are respectively arranged at two ends of the pile casing main body 41, the guiding and positioning plates 42 face the axis of the pile casing main body 41, and the four guiding and positioning plates 42 on the same side are aligned with the four angle steels 22 of the steel lattice 2 one by one.

A gap is left between the outer side edge of the guide positioning plate 42 and the angle steel 22, and in the embodiment, the gap distance between the outer side edge of the guide positioning plate 42 and the angle steel 22 is 7.5 mm. When the guiding and positioning pile casing 4 is hoisted, the gap of 7.5mm is beneficial to the guiding and positioning pile casing 4 to smoothly pass through the steel lattice 2 and reach the pile top of the concrete upright pile 1, and the pile is prevented from being clamped in the middle of the steel lattice 2.

In an alternative embodiment, the distance from the guide positioning plate to the end surface of the casing main body 41 is 50mm, the guide positioning plate 42 is shaped like an isosceles trapezoid, the long bottom edge of the trapezoidal guide positioning plate 42 is welded to the casing main body 41, the included angle between the two side edges and the long bottom edge is 45 °, the short bottom edge is an arc-shaped edge, and the chord length of the arc-shaped edge is 60 mm.

In an optional embodiment, at least one end of the casing main body 41 is provided with a hoisting hole 43, and the hoisting hole 43 is used for hoisting the guiding and positioning casing 4, so that the guiding and positioning casing 4 can be conveniently installed by a crane through the hoisting hole 43, the convenience is improved, and the installation speed is increased.

As shown in fig. 4 and 5, when the length of the steel lattice 2 is insufficient, the angle steel 22 needs to be lengthened, in order to match the use of the guiding and positioning casing 4, the invention further provides an angle steel lengthening structure of the steel lattice, each angle steel 22 of the structure comprises a combined angle steel, the combined angle steel comprises a first angle steel 201, a second angle steel 22202 and a welding angle steel 203, the end faces of the first angle steel 201 and the second angle steel 202 are welded, the welding angle steel 203 is arranged at the welding seam 204 on the inner side face, the length of the welding angle steel 203 is 500 mm, and the back edge of the welding angle steel 203 is provided with a back edge cut angle 2031.

The combined angle steels of the four angle steels 22 are not at the same horizontal height, namely the welding positions of the four angle steels 22 are staggered up and down, because in the welding position, a certain space is occupied inside the steel lattice 2 due to the arrangement of the welding angle steels 203, and if the welding positions of the different angle steels 22 are positioned on the same horizontal plane, the guide positioning protection cylinder 4 is not beneficial to being lowered; consequently, the welding position staggers and does benefit to guiding orientation and protects a section of thick bamboo 4 and pass steel lattice 2 smoothly and reach the pile bolck of concrete column pile 1, simultaneously, according to the aforesaid, leaves the clearance between the outside limit of guiding orientation board 42 and angle steel 22, and two structural design mutually support, can ensure that guiding orientation protects the smoothness nature of a section of thick bamboo 4 installation, dismantlement, lifting efficiency.

Compared with the first embodiment, the embodiment also has the following beneficial effects: the guide positioning protective cylinder builds a guide channel for the drilling process of the drill bit, the guide drill bit drills along the inclined direction of the steel lattice, the drill bit is prevented from being hit on the side wall of the steel lattice to damage the structure of the steel lattice, and the drill bit is even damaged, so that smooth drilling and coring are realized, and the hole forming efficiency is improved.

As shown in fig. 9, in order to obtain the steel stud pile of the second embodiment, this embodiment provides an optimized method for reinforcing a steel stud pile structure, which includes the following steps:

step S1, processing soil in the steel lattice;

step S2, cleaning holes of the steel lattice;

step S3, lowering the guide positioning protective sleeve, further comprising step a1, step a2, step b, step c and step d:

step a1, preparing a guide positioning protective sleeve: selecting a steel pipe as a pile casing main body 41 of the guide positioning pile casing 4, selecting a steel pipe with the outer diameter of 325 mm and the pipe wall of 8.5 mm as the pile casing main body 41 in the embodiment, welding four guide positioning plates 42 at two ends of the pile casing main body 41, wherein the direction of the four guide positioning plates 42 faces the axis of the pile casing main body 41, and the four guide positioning plates 42 are uniformly arranged on the circumference of the pile casing main body 41;

step a2, arranging hoisting holes 43 at two ends of the pile casing main body 41, and enabling the steel wire rope to penetrate through the hoisting holes 43 to hoist the guide positioning pile casing 4;

b, inserting the guide positioning protection cylinder 4 into the steel lattice 2, and aligning four trapezoidal guide positioning plates 42 of the guide positioning protection cylinder 4 with four angle steels 22 of the steel lattice 2;

c, putting the guide positioning pile casing 4 to the pile top of the concrete upright pile 1;

d, repeating the steps a 1-c, putting a plurality of guide positioning protective cylinders 4 downwards, and stacking the guide positioning protective cylinders 4 from bottom to top in sequence until the steel lattice 2 is filled;

step S4, forming holes in the concrete upright post pile, and specifically comprising the following steps:

step S41, the drill bit passes through the steel lattice 2 from the guide positioning protective cylinder 4;

step S42, the drill reaches the top of the concrete upright post pile 1, and drilling is carried out;

step S43, cleaning a drill hole 11 of the concrete upright post pile 1;

step S5, placing the steel pipe 3 into the hole, penetrating the steel pipe 3 into the guide positioning casing 4 in the steel lattice 2, and inserting the steel pipe 3 into the drill hole 11 of the concrete upright pile 1;

step S6, grouting in the steel pipe;

step S7, taking out the guide positioning protective sleeve: taking out the guiding and positioning casing 4 before the cement slurry is solidified, and moving to the next steel upright pile needing to be reinforced for use;

and S8, reinforcing the steel pipe and the steel lattice.

It should be noted that, since the steps in the second embodiment that are not described are the same as those in the first embodiment, they are not described herein again.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.