Glass fiber sleeve- underwater epoxy grouting material reinforced pile foundation construction method

Abstract

This invention relates to a construction method for reinforcing pile foundations with fiberglass sleeves and underwater epoxy grout. The pile foundation defect cleaning and fiberglass sleeve installation utilize a liftable operating platform with an upper pull and lower support, adaptable to different height requirements, effectively improving construction efficiency and safety, ensuring construction quality, and reducing the impact on the surrounding environment. The pile foundation reinforcement employs a symmetrical underwater epoxy grouting device with clamps, effectively improving the pile foundation's bearing capacity and stability. Symmetrical underwater epoxy grouting ensures the pile foundation remains stable under water flow and wave disturbances, while reducing the amount of on-site casting and improving construction efficiency. The method also utilizes a movable construction platform with clamp-type pile foundations for synchronous grouting and pile side soil reinforcement. Pressure grouting through pile side boreholes effectively enhances soil cohesion and strength, reduces displacement differences, and makes the load more balanced and stable, effectively improving the pile foundation's bearing capacity and stability.

Description

Technical Field

[0001] This invention belongs to the field of bridge engineering technology, and in particular relates to a construction method for reinforcing pile foundations with fiberglass sleeves and underwater epoxy grouting material. Background Technology

[0002] Bridge piers and pile foundations, as the main load-bearing components of bridges, play a decisive role in the bridge's load-bearing capacity and operational safety. Underwater pile foundations are prone to damage due to construction difficulties and susceptibility to water erosion and other factors. Severe pile foundation damage can seriously affect structural safety, necessitating detailed damage detection and load-bearing capacity assessment, followed by targeted repair and reinforcement. Traditional underwater pile foundation repair and reinforcement methods suffer from difficulties in cleaning pile defects, low efficiency in pouring concrete and installing fiberglass sleeves at defective areas, and high difficulty in grouting. Therefore, a new pile foundation reinforcement method and construction approach are urgently needed to address these issues. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a construction method for reinforcing pile foundations with fiberglass sleeves and underwater epoxy grouting material.

[0004] This method for reinforcing pile foundations using fiberglass sleeves and underwater epoxy grouting includes the following steps:

[0005] Step 1: Construct piers and tie beams, using the lower liftable support rods and telescopic hangers to pull the tie beams to adjust the height of the operation platform for cleaning pile foundation defects and installing fiberglass sleeves;

[0006] Step 2: Clean the defective areas of the pile foundation on the pile foundation defect cleaning and fiberglass sleeve installation operation platform;

[0007] Step 3: On the pile foundation defect cleaning and fiberglass sleeve installation operation platform, wrap the fiberglass sleeve around the pile foundation and seal the bottom of the fiberglass sleeve; inject underwater epoxy grout into the fiberglass sleeve;

[0008] Step 4: Hoist the movable construction platform and perform synchronous pressure grouting of the pile side pilot holes;

[0009] Step 5: After filling the area around the pile foundation with bagged crushed stone, lay the top membrane bag concrete, and use interlocking block soft drainage and protection on the outside.

[0010] Preferably, piers are constructed above the pile foundation, with adjacent piers connected by tie beams. The support base plate is connected to the pile foundation by a support base plate clamp. Lower liftable support rods are symmetrically installed on the support base plates on both sides of the pile foundation. The lower liftable support rods are equipped with lifting support rod fixing clips. A pile foundation defect cleaning and fiberglass sleeve installation operation platform is installed on the upper part of the lower liftable support rods. Protective railings are installed on both sides of the pile foundation defect cleaning and fiberglass sleeve installation operation platform. An upper telescopic hanger is connected to the pile foundation defect cleaning and fiberglass sleeve installation operation platform installed on the upper inner side of the pile foundation. The upper part of the upper telescopic hanger is connected to the tie beam by a telescopic hanger-tied beam connecting bolt. An upper telescopic hanger control device is installed between the upper telescopic hangers.

[0011] Preferably, in step two, the extension length of the upper telescopic boom is controlled by the upper telescopic boom control device, thereby controlling the height of the pile foundation defect cleaning and fiberglass sleeve installation operation platform. After determining the height of the pile foundation defect cleaning and fiberglass sleeve installation operation platform, the lifting support rod fixing buckle is locked to ensure the stability of the pile foundation defect cleaning and fiberglass sleeve installation operation platform, and then the cleaning operation of the pile foundation defect cleaning area is carried out.

[0012] Preferably, the fiberglass sleeve includes two semi-circular structures connected by a locking groove filled with epoxy sealant. The fiberglass sleeve is wrapped around the outside of the pile foundation, and a fastening band is temporarily tied to the surface of the fiberglass sleeve. A pad is placed at the locking groove of the fiberglass sleeve and secured with stainless steel anchors. The bottom of the fiberglass sleeve is sealed with an underwater epoxy grouting sealant.

[0013] Preferably, the underwater epoxy grouting material pouring device for the clamp-type pile foundation includes a first supporting horizontal bar, which is connected to the pile foundation via a clamp on the lower part of the grouting material pouring device. A first supporting vertical bar is vertically connected to the first supporting horizontal bar, and a second supporting horizontal bar is vertically connected to the first supporting vertical bar. The second supporting horizontal bar is connected to a fiberglass sleeve. The upper part of the first supporting vertical bar is connected to a grouting material conduit. The second supporting horizontal bar is vertically connected to a second supporting vertical bar, and the upper part of the second supporting vertical bar is connected to a grouting material conduit. The upper part of the grouting material conduit is reinforced by a third supporting horizontal bar, which is connected to the pile foundation via a clamp on the upper part of the grouting material pouring device. In step three, the underwater epoxy grouting material is injected into the fiberglass sleeve through the grouting material conduit. After the fiberglass sleeve is filled, it is sealed at the top by a top sealing strip.

[0014] Preferably, the ring-hoop connecting bracket is connected to the pile foundation clamp via the ring-hoop connecting device. The upper part of the telescopic rod is connected to the ring-hoop connecting bracket, and the lower part of the telescopic rod passes through the movable construction platform. The bottom of the telescopic rod is equipped with a movable construction platform base support, which rests on the movable construction platform. The movable construction platform is equipped with guardrails on both sides. The movable construction platform can be moved up and down by controlling the length of the telescopic rod. Pipe-side pilot hole construction is carried out in the soil layer around the pile foundation. Several pile-side pilot hole grouting pipes are installed on the pile side, and the pile end grouting material is injected synchronously into the pile-side pilot holes through the pile-side pilot hole grouting pipes.

[0015] As a preferred option, in step five, bagged crushed stone is dumped around the bottom of the pile foundation, the top of the bagged crushed stone is covered with top membrane bag concrete, and interlocking block soft drainage protection is used on the outside of the top membrane bag concrete.

[0016] Fiberglass sleeve-underwater epoxy grouting material reinforced pile foundation, obtained by any of the methods described above.

[0017] The beneficial effects of this invention are:

[0018] 1) The present invention adopts an up-pull and down-support type lifting operation platform for pile foundation defect cleaning and fiberglass sleeve installation, which can adapt to different height operation requirements, effectively improve construction efficiency and safety, ensure construction quality, and reduce the impact on the surrounding environment.

[0019] 2) The present invention adopts a symmetrical underwater epoxy grouting material casting device for pile foundation reinforcement, which effectively improves the bearing capacity and stability of the pile foundation. Through symmetrical underwater epoxy grouting material casting, the pile foundation is ensured to remain stable under the disturbance of water flow and waves, while reducing the amount of on-site casting and improving construction efficiency.

[0020] 3) This invention adopts a hoop-type suspended movable construction platform for synchronous grouting of pile side soil reinforcement technology. Through pressure grouting through pile side guide holes, the soil cohesion and strength are effectively enhanced, the displacement difference is reduced, the load is more balanced and stable, and the bearing capacity and stability of the pile foundation are effectively improved.

[0021] 4) The scour protection of the bridge pier pile foundation of the present invention adopts the sand-filled membrane bag sand scour protection technology after the pile foundation guides the sliding. The bottom of the middle bridge pier pile foundation is filled with bagged crushed stone, and the top is weighed with membrane bag concrete, which effectively protects the mud surface erosion at the pile foundation and the bagged crushed stone filling material. The pile foundations of the two bridge piers on both sides are protected by concrete interlocking block soft drainage beach, which effectively protects the bridge pier pile foundation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an upward-pull-down-support liftable operating platform structure;

[0023] Figure 2This is a schematic diagram of the fiberglass sleeve installation and stabilization bracket and construction platform structure;

[0024] Figure 3 This is a schematic diagram of the symmetrical grouting material pouring device for clamp pile foundation;

[0025] Figure 4 This is a partial structural diagram of underwater epoxy grouting material;

[0026] Figure 5 This is a schematic diagram of a synchronous grouting pile side soil reinforcement structure using a retractable construction platform suspended from a hoop pile foundation.

[0027] Figure 6 This is a schematic diagram of the sand-flushing membrane bag protection structure after the bridge pier pile foundation guides the slippage.

[0028] In the diagram: 1-Pile foundation, 2-Pier column, 3-Tie beam, 4-Support base plate, 5-Support base plate clamp, 6-Lower adjustable support rod, 7-Liftable support rod fixing clip, 8-Pile foundation defect cleaning and fiberglass sleeve installation operation platform, 9-Guardrail, 10-Upper telescopic boom, 11-Telescopic boom and tie beam connection bolt, 12-Upper telescopic boom control device, 13-First support horizontal bar, 14-Lower clamp of grouting material pouring device, 15-First support vertical bar, 16-Second support horizontal bar, 17-Second support vertical bar, 18-Third support horizontal bar, 19-Upper clamp of grouting material pouring device, 20-Grouting material conduit, 21-Fiberglass sleeve, 22 - Underwater epoxy grouting material, 23- Locking groove, 24- Underwater epoxy grouting material bottom sealing strip, 25- Soil layer, 26- Ring hoop connection bracket, 27- Ring hoop connection device, 28- Control device, 29- Telescopic rod, 30- Mobile construction platform base support, 31- Mobile construction platform, 32- Mobile construction platform guardrail, 33- Pile side pilot hole pressure grouting pipe, 34- Pile side pilot hole, 35- Pile end grouting material, 36- Bagged crushed stone, 37- Top membrane bag concrete, 38- Interlocking block soft strip, 39- Pad block, 40- Stainless steel anchor, 41- Top sealing strip, 42- Pile foundation defect cleaning area, 43- Epoxy sealing adhesive, 44- Fastening band. Detailed Implementation

[0029] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that those skilled in the art can make several modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0030] Example 1

[0031] As one example, such as Figures 1 to 6As shown, the main construction process of this fiberglass sleeve-underwater epoxy grouting material reinforced pile foundation is as follows:

[0032] Step 1: Preparation of fiberglass sleeve 21: Transport the fiberglass sleeve 21 to be installed to the construction site.

[0033] Step 2: Installation of the top-pull, bottom-support type liftable operating platform: Piers 2 are constructed above pile foundation 1. Adjacent piers 2 are connected by tie beams 3. The support base plate 4 is connected to pile foundation 1 by support base plate clamps 5. Lower liftable support rods 6 are symmetrically installed on the support base plates 4 on both sides of pile foundation 1. The lower liftable support rods 6 are equipped with lifting support rod fixing clips 7. A pile foundation defect cleaning and fiberglass sleeve installation operating platform 8 is installed on the upper part of the lower liftable support rods 6. Protective railings 9 are installed on both sides of the pile foundation defect cleaning and fiberglass sleeve installation operating platform. The pile foundation defect cleaning and fiberglass sleeve installation operating platform is installed on the upper inner side of pile foundation 1. The upper telescopic rod 10 is connected to the upper part of the pile foundation defect cleaning and fiberglass sleeve installation operation platform 8. The upper telescopic rod 10 is connected to the tie beam via the telescopic rod and tie beam connecting bolt 11. The upper telescopic rod control device 12 is installed between the upper telescopic rods 10. The telescopic rod 10 extension length is controlled by the upper telescopic rod control device 12, thereby controlling the height of the pile foundation defect cleaning and fiberglass sleeve installation operation platform 8. After determining the height of the pile foundation defect cleaning and fiberglass sleeve installation operation platform 8, the lifting support rod fixing buckle 7 is locked to ensure the stability of the pile foundation defect cleaning and fiberglass sleeve installation operation platform 8.

[0034] Step 3, cleaning of pile foundation column 1: After the installation of the pull-up and support type lifting operation platform, the cleaning work of the pile foundation defect cleaning part 42 is carried out.

[0035] Step 4, Installation of Fiberglass Sleeve 21: After the surface of the pile foundation 1 is cleaned, the fiberglass sleeve 21 is installed using an up-and-down liftable operating platform. Epoxy sealant 43 is injected into the locking groove 23 of the fiberglass sleeve 21 to open and wrap the fiberglass sleeve 21 around the pile foundation 1. The fiberglass sleeve 21 is temporarily fixed using fastening straps 44. Then, the locking groove 23 of the fiberglass sleeve 21 is tightened by padding with pads 39 and using stainless steel anchors 40. Finally, the bottom of the fiberglass sleeve 21 is sealed with underwater epoxy grouting sealant 24.

[0036] Step 5: Install the underwater epoxy grouting material 22 pouring device for the symmetrical pile foundation and pour the underwater epoxy grouting material 22 into the fiberglass sleeve 21.

[0037] Example 2

[0038] As another embodiment, this second embodiment proposes a more specific construction method for reinforcing pile foundations with fiberglass sleeves and underwater epoxy grouting material, based on the first embodiment:

[0039] Step five is as follows: The first support horizontal bar 13 is connected to the pile foundation 1 through the lower clamp 14 of the grouting material pouring device. The first support vertical bar 15 is vertically connected to the first support horizontal bar 13. The second support horizontal bar 16 is vertically connected to the first support vertical bar 15. The second support horizontal bar 16 is connected to the fiberglass sleeve 21. The upper part of the first support vertical bar 15 is connected to the grouting material conduit 20. The second support vertical bar 17 is vertically connected to the second support horizontal bar 16. The upper part of the second support vertical bar 17 is connected to the grouting material conduit 20. The upper part of the grouting material conduit 20 is reinforced by the third support horizontal bar 18. The third support horizontal bar 18 is connected to the pile foundation 1 through the upper clamp 19 of the grouting material pouring device. The underwater epoxy grouting material 22 is injected into the fiberglass sleeve 21 through the grouting material conduit 20. After the fiberglass sleeve 21 is filled, the top is sealed by the top sealing strip 41. After all construction is completed and the underwater epoxy grout 22 has cured for at least 24 hours at room temperature, the fastening strip 44 can be removed.

[0040] Step Six: Installation of the movable construction platform for the hoist pile foundation: The hoist connecting bracket 26 is connected to the hoist of the pile foundation 1 via the hoist connecting device 27. The upper part of the telescopic rod 29 is connected to the hoist connecting bracket 26, and the lower part of the telescopic rod 29 passes through the movable construction platform 31. The bottom of the telescopic rod 29 is equipped with a movable construction platform base support 30, which supports the movable construction platform 31. The movable construction platform 31 is equipped with movable construction platform guardrails 32 on both sides. The length of the telescopic rod 29 can be controlled by the control device 28 to realize the up and down movement of the movable construction platform 31.

[0041] Step 7: Synchronous Grouting of Pile Side Soil Reinforcement Construction: After the installation of the movable construction platform for the hoop pile foundation is completed, the length of the telescopic rod 29 can be controlled by the control device 28 to realize the up and down movement of the movable construction platform 31, which facilitates the synchronous pressure grouting construction of the pile side soil; pile side pilot holes 34 are constructed in the soil layer 25 around the pile foundation 1, and several pile side pilot hole grouting pipes 33 are installed on the pile side. The pile end grouting material 35 is injected synchronously into the pile side pilot holes 34 through the pile side pilot hole grouting pipes 33.

[0042] Step 8: Construction of sand scouring protection using sand-filled membrane bags after the guide slip of the bridge pier pile foundation: The bottom of pile foundation 1 is filled with bagged crushed stone 36, the top is covered with top membrane bag concrete 37, and the two sides are protected with interlocking soft material drains 38.

[0043] It should be noted that the parts in this embodiment that are the same as or similar to those in Embodiment 1 can be referred to each other, and will not be repeated in this application.

[0044] Example 3

[0045] As another embodiment, this embodiment three is proposed based on embodiments one and two. This fiberglass sleeve-underwater epoxy grouting material reinforces the pile foundation. A pier 2 is constructed above the pile foundation 1. Adjacent piers 2 are connected by tie beams 3. A support base plate 4 is fixed on the pile foundation 1. The lower part of the pull-up and support type liftable operating platform is supported on the support base plate 4 by the lower liftable support rod 6, and the upper part is connected to the tie beam 3 by the telescopic hanger 10.

[0046] A symmetrical underwater epoxy grouting material 22 pouring device for the pile foundation 1 is also fixed on the pile foundation 1, which is used to support the grouting material conduit 20 and to grout the inside of the fiberglass sleeve 21.

[0047] A ring-shaped connecting bracket 26 is fixed on the pile foundation 1. A movable construction platform 31 is suspended below the ring-shaped connecting bracket 26 by a telescopic rod 29, which is used to construct pile side guide holes 34 in the soil layer 25 surrounding the pile foundation 1.

[0048] The bottom of the pile foundation 1 is filled with bagged crushed stone 36, the top is covered with top membrane bag concrete 37, and the two sides are protected by interlocking block soft drainage 38.

[0049] It should be noted that the parts in this embodiment that are the same as or similar to those in Embodiments 1 and 2 can be referred to each other, and will not be repeated in this application.

[0050] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

Claims

1. A method for constructing pile foundations reinforced with fiberglass sleeves and underwater epoxy grout, characterized in that, Includes the following steps: Step 1: Construct piers and tie beams, using the lower liftable support rods and telescopic hangers to pull the tie beams to adjust the height of the operation platform for cleaning pile foundation defects and installing fiberglass sleeves; Step 2: Clean the defect cleaning area of ​​the pile foundation on the pile foundation defect cleaning and fiberglass sleeve installation operation platform; construct piers above the pile foundation, connect adjacent piers through tie beams, connect the support base plate and the pile foundation through support base plate clamps, symmetrically install lower liftable support rods on the support base plates on both sides of the pile foundation, and set the lower liftable support rod fixing clips on the lower liftable support rods, install the pile foundation defect cleaning and fiberglass sleeve installation operation platform on the upper part of the lower liftable support rods, set guard railings on both sides of the pile foundation defect cleaning and fiberglass sleeve installation operation platform, connect the upper telescopic hanger to the pile foundation defect cleaning and fiberglass sleeve installation operation platform installed on the upper part of the inner side of the pile foundation, connect the upper telescopic hanger to the tie beam through telescopic hanger and tie beam connecting bolts, and install the upper telescopic hanger control device between the upper telescopic hangers; The extension length of the upper telescopic boom is controlled by the upper telescopic boom control device, thereby controlling the height of the pile foundation defect cleaning and fiberglass sleeve installation operation platform. After determining the height of the pile foundation defect cleaning and fiberglass sleeve installation operation platform, the lifting support rod fixing buckle is locked to ensure the stability of the pile foundation defect cleaning and fiberglass sleeve installation operation platform, and then the cleaning operation of the pile foundation defect cleaning area is carried out. Step 3: On the pile foundation defect cleaning and fiberglass sleeve installation operation platform, wrap the fiberglass sleeve around the pile foundation and seal the bottom of the fiberglass sleeve; inject underwater epoxy grout into the fiberglass sleeve; Step 4: Hoist the movable construction platform and perform synchronous pressure grouting of the pile side pilot holes; Step 5: After filling the area around the pile foundation with bagged crushed stone, lay the top membrane bag concrete, and use interlocking block soft drainage and protection on the outside.

2. The construction method for reinforcing pile foundations with fiberglass sleeve-underwater epoxy grouting material according to claim 1, characterized in that, The fiberglass sleeve consists of two semi-circular structures connected by a locking groove filled with epoxy sealant. The fiberglass sleeve is wrapped around the outside of the pile foundation, and a fastening band is temporarily tied to the surface of the fiberglass sleeve. A pad is placed at the locking groove of the fiberglass sleeve and secured with stainless steel anchors. The bottom of the fiberglass sleeve is sealed with an underwater epoxy grouting sealant.

3. The construction method for reinforcing pile foundations with fiberglass sleeve-underwater epoxy grouting material according to claim 1, characterized in that, The underwater epoxy grouting material pouring device for symmetrical pile foundation includes a first support horizontal bar, which is connected to the pile foundation via a lower clamp of the grouting material pouring device. A first support vertical bar is vertically connected to the first support horizontal bar, and a second support horizontal bar is vertically connected to the first support vertical bar. The second support horizontal bar is connected to a fiberglass sleeve. The upper part of the first support vertical bar is connected to a grouting material conduit. The second support horizontal bar is vertically connected to the second support vertical bar, and the upper part of the second support vertical bar is connected to a grouting material conduit. The upper part of the grouting material conduit is reinforced by a third support horizontal bar, which is connected to the pile foundation via a clamp on the grouting material pouring device. In step three, underwater epoxy grouting material is injected into the fiberglass sleeve through the grouting material conduit. After the fiberglass sleeve is filled, it is sealed at the top by a top sealing strip.

4. The construction method for reinforcing pile foundations with fiberglass sleeve-underwater epoxy grouting material according to claim 1, characterized in that, The hoop connection bracket is connected to the pile foundation clamp via the hoop connection device. The upper part of the telescopic rod is connected to the hoop connection bracket, and the lower part of the telescopic rod passes through the movable construction platform. The bottom of the telescopic rod is equipped with a movable construction platform base support, which rests on the movable construction platform. The movable construction platform is equipped with guardrails on both sides. The movable construction platform can be moved up and down by controlling the length of the telescopic rod. Pipe-side pilot hole construction is carried out in the soil layer around the pile foundation. Several pile-side pilot hole grouting pipes are installed on the pile side. The grouting material at the pile end is injected synchronously into the pile-side pilot holes through the pile-side pilot hole grouting pipes.

5. The construction method for reinforcing pile foundations with fiberglass sleeve-underwater epoxy grouting material according to claim 1, characterized in that, In step five, bagged crushed stone is dumped around the bottom of the pile foundation, and the top of the bagged crushed stone is covered with top membrane bag concrete. Interlocking block soft drainage and protection is used on the outside of the top membrane bag concrete.

6. Fiberglass sleeve-underwater epoxy grouting material for reinforcing pile foundations, characterized in that... The method for reinforcing pile foundations with fiberglass sleeve-underwater epoxy grout as described in any of claims 1 to 5.

Images