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

Abstract

The invention relates to a glass fiber sleeve-underwater epoxy grouting material reinforced pile foundation construction method, pile foundation defect cleaning and glass fiber sleeve installation adopt a pull-up and support-down type liftable operation platform, can adapt to different height operation requirements, effectively improves the construction efficiency and safety, ensures the construction quality, and reduces the influence on the surrounding environment; a hoop pile foundation symmetrical underwater epoxy grouting material pouring device is adopted for pile foundation reinforcement, the bearing capacity and stability of a pile foundation are effectively improved, it is ensured that the pile foundation is kept stable under disturbance of water flow and waves through symmetrical underwater epoxy grouting material pouring, meanwhile, the cast-in-place workload is reduced, and the construction efficiency is improved; the hoop pile foundation hanging movable construction platform synchronous grouting pile side soil reinforcement technology is adopted, grouting is conducted through pile side guide hole pressure, the soil body bonding force and strength are effectively enhanced, the displacement difference is reduced, loads are more balanced and stable, and the pile foundation bearing capacity and stability are effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a construction method for reinforcing a pile foundation with a glass fiber sleeve and underwater epoxy grouting material. Background Art

[0002] As the main load-bearing component of the bridge, the pier pile foundation plays a decisive role in the bearing capacity and operational safety of the bridge. Underwater pile foundations are difficult to construct and are easily affected by factors such as water scouring and water erosion, which can cause damage. When the pile foundation is seriously damaged, it will have a serious impact on its structural safety. Detailed damage detection and bearing capacity assessment are required, and targeted repair and reinforcement of bridge pile foundation damage are required. Traditional underwater pile foundation damage repair and reinforcement have problems such as difficulty in cleaning pile foundation defects, low efficiency in pouring and installing fiberglass sleeves at pile foundation defects, and difficulty in pile foundation grouting construction. Therefore, a new reinforced pile foundation and construction method are urgently needed to solve this problem. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a construction method for reinforcing pile foundations using a glass fiber sleeve and underwater epoxy grouting material.

[0004] The fiberglass sleeve-underwater epoxy grouting material reinforced pile foundation construction method comprises the following steps:

[0005] Step 1: construct piers and tie beams, use the lower liftable support rods and retractable hangers to pull the tie beams to adjust the height of the pile foundation defect cleaning and fiberglass sleeve installation operation platform;

[0006] Step 2: Clean the pile foundation defect cleaning area on the pile foundation defect cleaning and glass fiber sleeve installation operation platform;

[0007] Step 3: Wrap the pile foundation with the fiberglass sleeve on the pile foundation defect cleaning and fiberglass sleeve installation operation platform to seal the bottom of the fiberglass sleeve; pour underwater epoxy grouting material into the fiberglass sleeve;

[0008] Step 4: hoist the movable construction platform and carry out synchronous pressure grouting of the side lead hole of the pile;

[0009] Step 5: After filling bagged gravel around the pile foundation, lay the top membrane bag concrete, and use interlocking block soft-body drainage to protect the beach on the outside.

[0010] Preferably, piers are constructed above the pile foundation, adjacent piers are connected by tie beams, the supporting base plate and the pile foundation are connected by supporting base plate clamps, lower liftable support rods are symmetrically installed on the supporting base plates on both sides of the pile foundation, and liftable support rod fixing sockets are provided on the lower liftable support rods, a pile foundation defect cleaning and glass fiber sleeve installation operating platform is installed on the upper part of the lower liftable support rods, and guardrails are provided on both sides of the pile foundation defect cleaning and glass fiber sleeve installation operating platform, an upper retractable hanger is connected to the pile foundation defect cleaning and glass fiber sleeve installation operating platform installed on the inner upper part of the pile foundation, the upper part of the upper retractable hanger is connected to the tie beam through retractable hanger and tie beam connecting bolts, and an upper retractable hanger control device is installed between the upper retractable hangers.

[0011] Preferably, in step two, the telescopic 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 glass fiber sleeve installation operating platform, and after determining the height of the pile foundation defect cleaning and glass fiber sleeve installation operating platform, the fixing bayonet of the liftable support rod is locked to ensure the stability of the pile foundation defect cleaning and glass fiber sleeve installation operating platform, and then the cleaning operation of the pile foundation defect cleaning area is carried out.

[0012] Preferably, the fiberglass sleeve includes two semicircular structures, which are connected by a locking groove, the locking groove is filled with epoxy sealing glue, the fiberglass sleeve is wrapped around the outside of the pile foundation, the surface of the fiberglass sleeve is temporarily tied with a fastening belt, the locking groove of the fiberglass sleeve is padded with a pad and fastened with a stainless steel anchor, and the bottom of the fiberglass sleeve is sealed with an underwater epoxy grouting bottom sealing strip.

[0013] Preferably, a symmetrical underwater epoxy grouting material pouring device for a hoop pile foundation comprises a first support cross bar, the first support cross bar is connected to the pile foundation through a lower hoop of the grouting material pouring device, the first support cross bar is vertically connected to the first support vertical bar, the first support vertical bar is vertically connected to the second support cross bar, the second support cross bar is connected to the fiberglass sleeve, the upper part of the first support vertical bar is topped with a grouting material conduit, the second support cross bar is vertically connected to the second support vertical bar, the upper part of the second support vertical bar is topped with a grouting material conduit, the upper part of the grouting material conduit is reinforced by a third support cross bar, the third support cross bar is connected to the pile foundation through an upper hoop 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, and the top is sealed by a top sealing strip after the fiberglass sleeve is filled.

[0014] Preferably, the hoop connecting bracket is connected to the pile foundation hoop through a hoop connecting device, the upper part of the retractable boom is connected to the hoop connecting bracket, the lower part of the retractable boom passes through the movable construction platform, a movable construction platform base support is arranged at the bottom of the retractable boom, the movable construction platform base support is supported under the movable construction platform, and movable construction platform guardrails are arranged on both sides of the movable construction platform. The movable construction platform can be moved up and down by controlling the length of the retractable boom, pile side lead holes are constructed in the soil layer around the pile foundation, a number of pile side lead hole grouting pipes are installed on the pile side, and the pile end grouting material is synchronously pressure grouted through the pile side lead hole grouting pipes for pile side lead holes.

[0015] Preferably, in step five, bagged gravel is dumped around the bottom of the pile foundation, the top of the bagged gravel is covered with top film bag concrete, and the outside of the top film bag concrete is covered with interlocking block soft beach protection.

[0016] A fiberglass sleeve-underwater epoxy grouting material reinforced pile foundation is obtained by any of the above methods.

[0017] The beneficial effects of the present invention are:

[0018] 1) The pile foundation defect cleaning and fiberglass sleeve installation of the present invention adopts an upper-pull and lower-supported liftable operating platform, 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 pile foundation reinforcement of the present invention adopts a symmetrical underwater epoxy grouting material pouring device for the hoop pile foundation, which effectively improves the bearing capacity and stability of the pile foundation. Through the symmetrical underwater epoxy grouting material pouring, it is ensured that the pile foundation remains stable under the disturbance of water flow and waves, while reducing the workload of cast-in-place and improving construction efficiency.

[0020] 3) The present invention adopts the technology of synchronous grouting pile side soil reinforcement by hanging a movable construction platform on the hoop pile foundation. Through pressure grouting in the pile side holes, the soil adhesion and strength are effectively enhanced, the displacement difference is reduced, the load is made 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 scour protection technology of sand film bag sand after pile foundation guided sliding. The bottom of the middle bridge pier pile foundation is filled with bagged gravel, and the top is weighted with film bag concrete, which effectively protects the mud surface erosion and bagged gravel filling at the pile foundation. The bridge pier pile foundations on both sides adopt concrete interlocking block soft beach protection to effectively protect the bridge pier pile foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a pull-up and support-down type liftable operating platform;

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

[0024] Figure 3 It is a structural schematic diagram of a symmetrical grouting material pouring device for a hoop pile foundation;

[0025] Figure 4 It is a schematic diagram of the local structure of underwater epoxy grouting material;

[0026] Figure 5 It is a schematic diagram of the side soil reinforcement structure of the hoop pile foundation with a retractable construction platform for synchronous grouting piles;

[0027] Figure 6 It is a schematic diagram of the sand scouring protection structure of the sand film bag after the guided sliding of the bridge pier pile foundation.

[0028] In the figure: 1-pile foundation, 2-pier column, 3-tie beam, 4-support base plate, 5-support base plate clamp, 6-lower liftable support rod, 7-liftable support rod fixing bayonet, 8-pile foundation defect cleaning and fiberglass sleeve installation operation platform, 9-guardrail, 10-upper telescopic hanger, 11-telescopic hanger and tie beam connecting bolt, 12-upper telescopic hanger control device, 13-first support cross bar, 14-grouting material casting device lower clamp, 15-first support vertical rod, 16-second support cross bar, 17-second support vertical rod, 18-third support cross bar, 19-grouting material casting device upper clamp, 20-grouting material conduit, 21-fiberglass sleeve, 22 - underwater epoxy grouting material, 23- locking groove, 24- bottom sealing strip of underwater epoxy grouting material, 25- soil layer, 26- hoop connecting bracket, 27- hoop connecting device, 28- control device, 29- telescopic boom, 30- movable construction platform bottom support, 31- movable construction platform, 32- movable construction platform guardrail, 33- pile side lead hole pressure grouting pipe, 34- pile side lead hole, 35- pile end grouting material, 36- bagged gravel, 37- top membrane bag concrete, 38- interlocking block soft row, 39- pad, 40- stainless steel anchor nail, 41- top sealing strip, 42- pile foundation defect cleaning part, 43- epoxy sealant, 44- fastening belt. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with embodiments. The description of the following embodiments is only used to help understand the present invention. It should be noted that for ordinary persons in the art, without departing from the principle of the present invention, the present invention can also be modified in some ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0030] Embodiment 1

[0031] As an example, Figures 1 to 6As shown in the figure, the main construction process of this glass fiber sleeve-underwater epoxy grouting material to reinforce the pile foundation is as follows:

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

[0033] Step 2, installation of the upper-pull and lower-support type liftable operating platform: construct pier columns 2 above the pile foundation 1, and the adjacent pier columns 2 are connected by tie beams 3. The support base plate 4 is connected to the pile foundation 1 by the support base plate clamp 5. The lower liftable support rods 6 are symmetrically installed on the support base plates 4 on both sides of the pile foundation 1. The lower liftable support rods 6 are provided with liftable support rod fixing bayonet 7. The pile foundation defect cleaning and fiberglass sleeve installation operating platform 8 is installed on the upper part of the lower liftable support rods 6. Guardrails 9 are set on both sides of the pile foundation defect cleaning and fiberglass sleeve installation operating platform 8. The pile foundation defect cleaning and fiberglass sleeve installation operating platform is installed on the inner upper part of the pile foundation 1. 8 is connected to an upper telescopic hanger 10, and the upper part of the upper telescopic hanger 10 is connected to the tie beam through a telescopic hanger and tie beam connecting bolt 11, and an upper telescopic hanger control device 12 is installed between the upper telescopic hanger 10. The telescopic length of the upper telescopic hanger 10 is controlled by the upper telescopic hanger control device 12, thereby controlling the height of the pile foundation defect cleaning and glass fiber sleeve installation operation platform 8. After determining the height of the pile foundation defect cleaning and glass fiber sleeve installation operation platform 8, the lifting support rod fixing bayonet 7 is locked to ensure the stability of the pile foundation defect cleaning and glass fiber sleeve installation operation platform 8.

[0034] Step 3: Cleaning the cylindrical surface of the pile foundation 1: After the installation of the upper pull-down support type liftable operating platform is completed, the cleaning operation of the pile foundation defect cleaning area 42 is carried out.

[0035] Step 4, installation of the fiberglass sleeve 21: After the cylindrical surface of the pile foundation 1 is cleaned, the fiberglass sleeve 21 is installed using an upper pull-down support type liftable operating platform; epoxy sealing glue 43 is poured into the locking groove 23 of the fiberglass sleeve 21, the fiberglass sleeve 21 is opened and wrapped around the pile foundation 1, and the fiberglass sleeve 21 is temporarily fixed with a fastening belt 44, and then the locking groove 23 of the fiberglass sleeve 21 is fastened by laying a pad 39 and using a stainless steel anchor 40, and then the bottom of the fiberglass sleeve 21 is sealed with an underwater epoxy grouting material and a bottom sealing strip 24.

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

[0037] Embodiment 2

[0038] As another embodiment, this embodiment 2 proposes a more specific construction method for reinforcing pile foundation with glass fiber sleeve-underwater epoxy grouting material on the basis of embodiment 1:

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

[0040] Step six, installation of the movable construction platform suspended from the hoop pile foundation: the hoop connecting bracket 26 is connected to the pile foundation 1 hoop through the hoop connecting device 27, the upper part of the telescopic suspension rod 29 is connected to the hoop connecting bracket 26, the lower part of the telescopic suspension rod 29 passes through the movable construction platform 31, and a movable construction platform base support 30 is arranged at the bottom of the telescopic suspension rod 29. The movable construction platform 31 is dragged by the movable construction platform base support 30, and movable construction platform guardrails 32 are arranged on both sides of the movable construction platform 31. The length of the telescopic suspension 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 pile side soil reinforcement construction: After the installation of the movable construction platform for hanging the hoop pile foundation is completed, the length of the telescopic suspension rod 29 can be controlled by the control device 28 to realize the up and down movement of the movable construction platform 31, which is convenient for the synchronous pressure grouting construction of the pile side soil; pile side lead holes 34 are constructed in the soil layer 25 around the pile foundation 1, and several pile side lead hole grouting pipes 33 are installed on the pile side. The pile end grouting material 35 is synchronously pressure grouted through the pile side lead hole grouting pipes 33 to perform pile side lead hole 34 grouting.

[0042] Step 8: Construction of sand scouring protection after guided sliding of the pier pile foundation: The bottom of the pile foundation 1 is filled with bagged gravel 36, the top is covered with top film bag concrete 37, and both sides are protected by interlocking block soft row 38.

[0043] It should be noted that the parts in this embodiment that are the same or similar to those in the first embodiment can be referenced to each other and will not be described in detail in this application.

[0044] Embodiment 3

[0045] As another embodiment, this embodiment three is proposed on the basis of embodiments one and two, in this glass fiber sleeve-underwater epoxy grouting material reinforced 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 upper pull and lower support type liftable operating platform is supported on the support base plate 4 by a lower liftable support rod 6, and the upper part is connected to the tie beam 3 by a telescopic suspension rod 10;

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

[0047] A hoop connection bracket 26 is fixed on the pile foundation 1 , and a movable construction platform 31 is suspended below the hoop connection bracket 26 through a telescopic suspension rod 29 for constructing a pile side guide hole 34 in the soil layer 25 around the pile foundation 1 .

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

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

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

Claims

1. A method for reinforcing pile foundations using a glass fiber sleeve and underwater epoxy grouting material, characterized in that: The following steps are involved: Step 1: construct piers and tie beams, use the lower liftable support rods and retractable hangers to pull the tie beams to adjust the height of the pile foundation defect cleaning and fiberglass sleeve installation operation platform; Step 2: Clean the pile foundation defect cleaning area on the pile foundation defect cleaning and glass fiber sleeve installation operation platform; Step 3: Wrap the pile foundation with the fiberglass sleeve on the pile foundation defect cleaning and fiberglass sleeve installation operation platform to seal the bottom of the fiberglass sleeve; pour underwater epoxy grouting material into the fiberglass sleeve; Step 4: hoist the movable construction platform and carry out synchronous pressure grouting of the side lead hole of the pile; Step 5: After filling bagged gravel around the pile foundation, lay the top membrane bag concrete, and use interlocking block soft-body drainage to protect the beach on the outside.

2. The method for reinforcing pile foundation by using glass fiber sleeve and underwater epoxy grouting material according to claim 1, characterized in that: Piers are constructed above the pile foundation, and adjacent piers are connected by tie beams, and the supporting base plate and the pile foundation are connected by supporting base plate clamps. Lower liftable support rods are symmetrically installed on the supporting base plates on both sides of the pile foundation, and liftable support rod fixing sockets are provided on the lower liftable support rods. An operating platform for pile foundation defect cleaning and fiberglass sleeve installation is installed on the upper part of the lower liftable support rods, and protective railings are provided on both sides of the operating platform for pile foundation defect cleaning and fiberglass sleeve installation. An upper retractable hanger is connected to the operating platform for pile foundation defect cleaning and fiberglass sleeve installation on the upper inner side of the pile foundation, and the upper part of the upper retractable hanger is connected to the tie beam through retractable hanger and tie beam connecting bolts, and an upper retractable hanger control device is installed between the upper retractable hangers.

3. The method for reinforcing pile foundation by glass fiber sleeve-underwater epoxy grouting material according to claim 2 is characterized in that: In step two, the telescopic 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 glass fiber sleeve installation operating platform. After determining the height of the pile foundation defect cleaning and glass fiber sleeve installation operating platform, the fixing bayonet of the liftable support rod is locked to ensure the stability of the pile foundation defect cleaning and glass fiber sleeve installation operating platform, and then the cleaning operation of the pile foundation defect cleaning area is carried out.

4. The method for reinforcing pile foundation by using glass fiber sleeve and underwater epoxy grouting material according to claim 1, characterized in that: The fiberglass sleeve includes two semicircular structures, which are connected by a locking groove. The locking groove is filled with epoxy sealing glue. The fiberglass sleeve is wrapped around the outside of the pile foundation. The surface of the fiberglass sleeve is temporarily tied with a fastening belt. The locking groove of the fiberglass sleeve is padded with a pad and fastened with a stainless steel anchor. The bottom of the fiberglass sleeve is sealed with an underwater epoxy grouting bottom sealing strip.

5. The method for reinforcing pile foundation by using glass fiber sleeve and underwater epoxy grouting material according to claim 1, characterized in that: The symmetrical underwater epoxy grouting material pouring device of the hoop pile foundation includes a first supporting cross bar, the first supporting cross bar is connected to the pile foundation through the lower hoop of the grouting material pouring device, the first supporting cross bar is vertically connected to the first supporting vertical bar, the first supporting vertical bar is vertically connected to the second supporting cross bar, the second supporting cross bar is connected to the glass fiber sleeve, the upper part of the first supporting vertical bar is topped with the grouting material conduit, the second supporting cross bar is vertically connected to the second supporting vertical bar, the upper part of the second supporting vertical bar is topped with the grouting material conduit, the upper part of the grouting material conduit is reinforced by the third supporting cross bar, the third supporting cross bar is connected to the pile foundation through the upper hoop of the grouting material pouring device, in step three, the underwater epoxy grouting material is injected into the glass fiber sleeve through the grouting material conduit, and the top is sealed by the top sealing strip after the glass fiber sleeve is filled.

6. The method for reinforcing pile foundation with glass fiber sleeve and underwater epoxy grouting material according to claim 1, characterized in that: The hoop connecting bracket is connected to the pile foundation hoop through the hoop connecting device, the upper part of the retractable boom is connected to the hoop connecting bracket, the lower part of the retractable boom passes through the movable construction platform, the bottom of the retractable boom is provided with a movable construction platform base support, the movable construction platform base support is supported under the movable construction platform, and movable construction platform guardrails are provided on both sides of the movable construction platform. The movable construction platform is moved up and down by controlling the length of the retractable boom, pile side lead holes are constructed in the soil layer around the pile foundation, several pile side lead hole grouting pipes are installed on the pile side, and the pile end grouting material is synchronously pressure grouted through the pile side lead hole grouting pipes for pile side lead holes.

7. The method for reinforcing pile foundation with glass fiber sleeve and underwater epoxy grouting material according to claim 1, characterized in that: In step five, bagged gravel is dumped around the bottom of the pile foundation, the top of the bagged gravel is covered with top film bag concrete, and the outside of the top film bag concrete is covered with interlocking block soft beach protection.

8. Glass fiber sleeve-underwater epoxy grouting material reinforced pile foundation, characterized in that: Obtained by the method according to any one of claims 1 to 7.

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