Reusable grouting matching device for pile head stratum reinforcement

Abstract

The utility model relates to the technical field of grouting, in particular to a reusable grouting matching device for pile head stratum reinforcement. According to the technical scheme, the reusable grouting matching device for pile head stratum reinforcement comprises a spiral stirrup, the spiral stirrup is connected with a plurality of PVC pipes, the PVC pipes are annularly arranged at equal intervals, a pile end grouting pipe is detachably inserted into each PVC pipe, and the pile end grouting pipe is connected with the spiral stirrup. And a plurality of grouting holes are formed in the lower part of the pile end grouting pipe. According to the utility model, the repeated use of the grouting pipe at the pile end and the repeated use of the grouting pipe are realized, so that more grouting pipes do not need to be stored in the construction process, manpower and material resources are saved, the cost is greatly saved, the use convenience is improved, the construction efficiency is improved, in addition, the PVC pipe is reserved in the pile foundation and can be used for subsequent quality detection of the pile foundation, and the construction efficiency is improved. The convenience of subsequent pile foundation detection is improved, and the construction efficiency of the whole pile foundation is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to grouting technical field especially relates to a kind of grouting supporting device for pile head stratum reinforcement reusable. BACKGROUND

[0002] Long spiral drilling cast-in-place pile has the advantages of fast construction speed, low noise and vibration, wide adaptability to geological conditions, adjustable pile diameter, controllable quality and environmental protection, and is particularly suitable for construction in soft soil areas and urban centers with high environmental requirements, which makes it an ideal choice for many foundation projects.

[0003] However, due to the limitation of equipment capacity, the depth and diameter of the pile are difficult to meet the needs of super-deep or large-diameter piles; due to the limitation of construction technology, the pumping of pile body concrete is difficult, and the bearing capacity and durability of the pile are difficult to meet the design requirements. When high bearing capacity is required in densely built areas, the demand for rapid improvement of the additional bearing capacity of long spiral drilling cast-in-place piles increases significantly, so grouting and reinforcement of the soil at a certain depth of the pile head end are needed. Due to the limitation of the construction method of the prior art, the grouting pipe cannot be reused after grouting is completed, resulting in low construction efficiency and high construction cost. Patent No. CN112376571A discloses a pile side and pile end integrated grouting device and its construction method, which realizes multi-section depth, quantitative and sectional grouting of pile side and pile end by setting one grouting pipe, simplifies the construction process, saves materials and has significant economic benefits. However, it does not use a better grouting pipe recycling method, and the grouting core pipe can only be reused, but the grouting pipe is sealed with grouting liquid and cannot be reused. SUMMARY

[0004] The utility model provides a kind of grouting supporting device for pile head stratum reinforcement reusable, solve the problem that grouting pipe in prior art cannot be reused after grouting is completed, resulting in low construction efficiency and high construction cost.

[0005] To solve the above technical problems, the technical scheme adopted by the utility model is as follows:

[0006] A kind of grouting supporting device for pile head stratum reinforcement reusable, including spiral stirrup, the spiral stirrup is connected with several PVC pipes, several PVC pipes are arranged at equal intervals in ring shape, a pile end grouting pipe is detachably inserted and installed in each PVC pipe, and a plurality of grout injection holes are provided at the lower part of the pile end grouting pipe.

[0007] Further, the lower part of the pile end grouting pipe extends out of the PVC pipe by a distance, and the grout injection holes are distributed on the part of the lower part of the pile end grouting pipe that extends out of the PVC pipe.

[0008] Further, the jetting holes are uniformly distributed on the part of the pile end grouting pipe extending out of the PVC pipe, and the jetting holes are located on three fourths of the surface of the part of the pile end grouting pipe extending out towards the inner side wall of the pile foundation.

[0009] Further, the bottom end of the pile end grouting pipe is in a tapered shape.

[0010] Further, the combination part of the spiral stirrup and the PVC pipe is provided with a reinforcing rib, and the reinforcing rib is fixed to the inner side of the spiral stirrup.

[0011] Further, a plurality of main bars are fixed to the inner side of the spiral stirrup at equal intervals, the bottom end of the main bar is bent and fixed to the second fixing ring, and the PVC pipe is fixed to the spiral stirrup, the main bar and the reinforcing rib through the clamp assembly.

[0012] Further, the pile end grouting pipe is detachably installed on the PVC pipe through the fixing clamp, the fixing clamp comprises a positioning bolt, a first fixing ring and a rubber pad, the rubber pad is annular, the rubber pad is sleeved on the pile end grouting pipe, two first fixing rings are arranged on the outer ring surface of the rubber pad, and one of the first fixing rings is provided with a positioning screw hole, and the positioning bolt is threadedly connected in the positioning screw hole of the first fixing ring.

[0013] Further, the device further comprises a grouting plug, and the grouting plug is inserted into the gap space between the pile end grouting pipe and the PVC pipe.

[0014] The device has the following advantages: after grouting, the positioning bolt is loosened, the first fixing ring is removed, and then the pile end grouting pipe is pulled out of the PVC pipe, so that the pile end grouting pipe can be repeatedly used, the grouting pipe can be repeatedly used, the construction process does not need to reserve many grouting pipes, manpower and material resources are saved, the cost is greatly saved, the convenience of use is improved, the construction efficiency is improved, in addition, the PVC pipe is reserved in the pile foundation and can be used for quality detection of subsequent pile foundations, the convenience of subsequent pile foundation detection is improved, and the construction efficiency of the whole pile foundation is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the grouting matching device for pile head stratum reinforcement and can be repeatedly used.

[0016] Figure 2 It is a structural schematic view of the grouting matching device for pile head stratum reinforcement and can be repeatedly used. Figure 1 It is a sectional view along A-A in the device.

[0017] Figure 3 It is a structural schematic view of the pile end grouting pipe and the PVC pipe in the device.

[0018] Figure 4 It is the positioning bolt structure schematic view in the utility model;

[0019] Figure 5 It is the first fixed ring structure schematic view in the utility model;

[0020] Figure 6 It is the rubber pad structure schematic view in the utility model;

[0021] Figure 7 It is the stop plug structure schematic view in the utility model;

[0022] Figure 8 It is the U-shaped clamp structure schematic view in the utility model;

[0023] Figure 9 It is the connecting horizontal plate structure schematic view in the utility model;

[0024] Figure 10 It is the wing nut structure schematic view in the utility model;

[0025] Figure 11 It is the gasket structure schematic view in the utility model;

[0026] In the drawing: 1, spiral stirrup; 2, pile end grouting pipe; 3, reinforcing rib; 4, PVC pipe; 5, positioning bolt; 6, first fixed ring; 7, rubber pad; 8, stop plug; 9, grouting hole; 10, main reinforcement; 11, second fixed ring. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by the person skilled in the art without creative labor are involved in the protection scope of the utility model.

[0028] Example 1

[0029] In conjunction with Figures 1-11 As shown in the figure, a kind of grouting matching device for pile head stratum reinforcement reusable, including spiral stirrup 1, a plurality of PVC pipes 4 are connected on spiral stirrup 1, a plurality of PVC pipes 4 are arranged in ring shape equidistantly, one pile end grouting pipe 2 is detachably inserted and installed in each PVC pipe 4, and a plurality of grouting holes 9 are arranged in the lower part of pile end grouting pipe 2.

[0030] Wherein, the PVC pipe 4 is installed on the spiral hoop 1 by the clamp assembly, the clamp assembly includes a U-shaped clamp, a connecting horizontal plate, two butterfly nuts and a gasket, as shown in Figures 8-11 The U-shaped clamp is used to fix the upper end of the PVC pipe 4 on the spiral hoop 1, and in use, the U-shaped clamp is first sleeved on the PVC pipe 4, then the spiral hoop 1 is clamped, the connecting horizontal plate is installed, the gasket is sleeved, and the butterfly nut is tightened, so that the installation and fixation of the PVC pipe 4 are completed.

[0031] The pile end grouting pipe 2 is detachably installed on the PVC pipe 4 by the fixing clamp, the fixing clamp includes a positioning bolt 5, a first fixing ring 6 and a rubber gasket 7, the rubber gasket 7 is annular, the rubber gasket 7 is sleeved on the pile end grouting pipe 2, two first fixing rings 6 are arranged on both sides of the outer ring surface of the rubber gasket 7, and the two first fixing rings 6 are located in the gap space between the pile end grouting pipe 2 and the PVC pipe 4, one of the first fixing rings 6 is provided with a positioning screw hole, and the positioning bolt 5 is threadedly connected in the positioning screw hole of the first fixing ring 6.

[0032] In the embodiment, in actual installation, a hole is first formed in the wall of the PVC pipe 4, the diameter of the hole is slightly larger than the diameter of the positioning screw hole of the first fixing ring 6, so as to be used later; the pile end grouting pipe 2 is inserted into the PVC pipe, and it is ensured that the hole part faces the pile side wall.

[0033] The fixing clamp is installed on the inner side of the PVC pipe 4, the positioning screw hole of the first fixing ring 6 is matched with the hole of the PVC pipe 4, the rubber gasket 7 is sleeved on the outer side wall of the pile end grouting pipe 2 in contact with the first fixing ring 6, and then the positioning bolt 5 is tightened, so that the pile end grouting pipe 2 cannot rotate and slide.

[0034] The spiral hoop is made according to the corresponding pile foundation design drawing, the PVC pipe 4 is clamped on the spiral hoop by the U-shaped clamp, then the horizontal plate and the gasket are installed, and finally the butterfly nut is tightened, so that the positioning and installation of the spiral hoop 1, the pile end grouting pipe 2 and the PVC pipe 4 are completed, and then grouting can be performed, and the grout is sprayed from the grouting hole 9 at the bottom of the pile end grouting pipe 2 to the pile foundation soil.

[0035] After grouting is completed, the positioning bolt 5 is loosened to remove the first fixing ring 6, and then the pile end grouting pipe 2 is pulled out of the PVC pipe, so that the pile end grouting pipe 2 can be repeatedly used, the repeated use of the grouting pipe makes it unnecessary to reserve many grouting pipes in the construction process, saves manpower and material resources, greatly saves the cost, improves the convenience of use, improves the construction efficiency, in addition, the PVC pipe 4 remains in the pile foundation and can be used for subsequent quality detection of the pile foundation, improves the convenience of subsequent pile foundation detection, and greatly improves the construction efficiency of the entire pile foundation.

[0036] In addition, the first fixing ring 6 is made of high-strength and high-toughness engineering plastic, the outer diameter of which is accurately matched with the inner diameter of the PVC pipe 4, and the inner diameter is slightly larger than the diameter of the pile end grouting pipe 2, and the end portion extends outward by a part and is protruded, and the protruded part is slightly larger than the outer diameter of the PVC pipe 4, so that the first fixing ring 6 cannot slide downward in use.

[0037] A positioning screw hole is formed on the outer side wall of the first fixing ring 6, and a rubber pad 7 is installed on the inner side. When the positioning bolt 5 is tightened, the rotation of the pile end grouting pipe 2 can be effectively prevented by the extrusion effect.

[0038] The rubber pad 7 can not only increase the friction between the first fixing ring 6 and the pile end grouting pipe 2, but also can protect the pile end grouting pipe 2 from being damaged.

[0039] Example 2

[0040] In combination with Figures 1-3 The difference between the embodiment and the embodiment 1 is that:

[0041] The pile end grouting pipe 2 extends downward by a distance from the PVC pipe 4, and the grouting holes 9 are distributed on the part of the pile end grouting pipe 2 extending downward from the PVC pipe 4.

[0042] The grouting holes 9 are evenly distributed on the part of the pile end grouting pipe 2 extending downward from the PVC pipe 4, and the grouting holes 9 are located on three-fourths of the surface of the part of the pile end grouting pipe 2 extending downward from the PVC pipe 4, which faces the inner side wall of the pile foundation.

[0043] In the embodiment, the number of the PVC pipes 4 and the pile end grouting pipes 2 can be four or other numbers, and taking four as an example, the grouting holes 9 of the four pile end grouting pipes 2 extending downward face the inner side wall of the pile foundation, so that the pile foundation can be uniformly grouted.

[0044] In the embodiment, the PVC pipe is a hard plastic pipe, and the pile end grouting pipe 2 extends downward from the PVC pipe by 150-250 cm. The pile end grouting pipe 2 is a grouting steel pipe with an outer diameter of 32 mm, and is sleeved with a PVC pipe with an outer diameter of 40 mm. The pile end grouting pipe 2 is located inside the spiral hoop 1, and the length of the pile end grouting pipe 2 exceeds the bottom of the spiral hoop 1 by 100-200 cm.

[0045] The bottom end of the pile end grouting pipe 2 is in a sharp conical shape, which is convenient for insertion into the pile foundation.

[0046] Example 3

[0047] In combination with Figures 1-11 The difference between the embodiment and the embodiment 2 is that:

[0048] The combination part of the spiral hoop 1 and the PVC pipe 4 is provided with a reinforcing rib 3 which is fixed to the inner side of the spiral hoop 1, further improving the strength of the reinforcement cage.

[0049] The inner side of the spiral hoop 1 is provided with a plurality of main reinforcement bars 10 which are fixed to the second fixing ring 11 by being bent at the bottom end, and the PVC pipe 4 is fixed to the spiral hoop 1, the main reinforcement bars 10 and the reinforcing rib 3 by a clamp assembly.

[0050] The stop plug 8 is inserted into the gap space between the pile end grouting pipe 2 and the PVC pipe 4.

[0051] The thickness of the stop plug 8 inserted into the PVC pipe 4 is slightly equal to the thickness of the gap between the pile end grouting pipe 2 and the PVC pipe 4, the inner diameter of the stop plug 8 is consistent with the outer diameter of the pile end grouting pipe 2, and the end of the stop plug 8 is provided with a protrusion whose outer diameter is slightly larger than the outer diameter of the PVC pipe 4.

[0052] The stop plug 8 is made of compressible high-elastic rubber, which can effectively prevent the backflow of grout into the gap between the PVC pipe 4 and the pile end grouting pipe 2, and at the same time, plays a role of assisting the pile end grouting pipe 2 to be centered in the PVC pipe 4. When the grouting pipe is pulled out, the grout on the outer wall of the end of the pile end grouting pipe 2 can be cleaned, saving manpower and ensuring that the grouting pipe can be directly reused next time.

[0053] The stop plug is installed at the lower end to block the backflow of grout into the gap between the PVC pipe and the steel pipe.

[0054] The above embodiment describes the content in more detail and concretely, expresses the preferred embodiment of the utility model, and is only used for explaining the technical idea and characteristics of the utility model, and its purpose is to enable the person skilled in the art to understand the content of the utility model and to implement it, but is not limited to the utility model, and the patent range of the utility model cannot be limited by the embodiment, that is, any equivalent change or modification of the spirit disclosed by the utility model, the local improvement of the system and the change between the subsystems without departing from the structure of the utility model, is still within the patent range of the utility model.

Claims

1. A reusable grouting package for pile head ground reinforcement, characterized by, Including spiral stirrup (1), a plurality of PVC pipes (4) are connected on the spiral stirrup (1), a plurality of the PVC pipes (4) are arranged in a ring shape at equal intervals, and a pile end grouting pipe (2) is detachably inserted and installed in each of the PVC pipes (4), and a plurality of grouting holes (9) are arranged on the lower part of the pile end grouting pipe (2).

2. A reusable pile head strata reinforcement grouting kit according to claim 1, wherein, The lower part of the pile end grouting pipe (2) extends out of the PVC pipe (4) by a distance, and the grouting holes (9) are distributed on the part of the pile end grouting pipe (2) extending out of the PVC pipe (4).

3. A reusable pile head strata reinforcement grouting kit according to claim 2, wherein, The grouting holes (9) are uniformly distributed on the part of the pile end grouting pipe (2) extending out of the PVC pipe (4), and the grouting holes (9) are located on three-fourths of the surface of the part of the pile end grouting pipe (2) extending out, which is directed towards the inner side wall of the pile foundation.

4. A reusable pile head strata reinforcement grouting kit according to claim 3, wherein, The bottom end of the pile end grouting pipe (2) is in a sharp taper shape.

5. A reusable pile head strata reinforcement grouting kit as claimed in claim 1, wherein, The combination part of the spiral stirrup (1) and the PVC pipe (4) is provided with a reinforcing rib (3), and the reinforcing rib (3) is fixedly connected to the inner side of the spiral stirrup (1).

6. A reusable pile head strata reinforcement grouting kit as claimed in claim 1, wherein, The inner side of the spiral stirrup (1) is annularly and equidistantly provided with a plurality of main ribs (10), the bottom end of the main rib (10) is bent and fixedly connected to a second fixing ring (11), and the PVC pipe (4) is fixedly installed on the spiral stirrup (1), the main rib (10) and the reinforcing rib (3) through a clamp assembly.

7. A reusable pile head strata reinforcement grouting kit as claimed in claim 1, wherein, The pile end grouting pipe (2) is detachably installed on the PVC pipe (4) through a fixing clamp, the fixing clamp comprises a positioning bolt (5), a first fixing ring (6) and a rubber pad (7), the rubber pad (7) is annular, the rubber pad (7) is sleeved on the pile end grouting pipe (2), two first fixing rings (6) are arranged on the outer ring surface of the rubber pad (7) on both sides, two first fixing rings (6) are located in the gap space between the pile end grouting pipe (2) and the PVC pipe (4), one of the first fixing rings (6) is provided with a positioning screw hole, and the positioning bolt (5) is threadedly connected in the positioning screw hole of the first fixing ring (6).

8. A reusable pile head strata reinforcement grouting kit as claimed in claim 1, wherein, Further comprising a grouting plug (8) inserted into the gap space between the pile end grouting pipe (2) and the PVC pipe (4).

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