Construction technology for preventing stress concentration part from being bonded with prestress anti-pulling glass fiber anchor rod pile

Abstract

The invention discloses a construction process for preventing a stress concentration part from being bonded with a prestress anti-pulling glass fiber anchor rod pile. The construction process comprises the following steps that a construction site is managed, the position of the anchor rod pile is determined, drilling is completed through a long spiral drilling machine, a glass fiber rod cage is hoisted into the drilled hole after the drilled hole is detected, adjustment is conducted after grouting is completed, and then the operation is repeated. According to the construction process for avoiding stress concentration and partially bonding the prestress anti-pulling glass fiber anchor rod pile, an arrangement mode for avoiding stress concentration is adopted, so that the superiority is shown in a horizontal bedding development stratum; meanwhile, the glass fiber material with good corrosion resistance is adopted, so that the requirement of the anti-floating anchor rod under the corrosion condition is met; the design of partial bonding prestress is adopted, so that the stress characteristic that a traditional anti-pulling anchor rod is loosened when being pulled is changed into the stress characteristic that the traditional anti-pulling anchor rod is tightened when being pulled like a wedge, the bearing capacity of the anchor rod with the same length and diameter is greatly improved, the bearing capacity can be improved by 80% according to related test data, and the economic benefit advantage is obvious.

Description

Technical Field

[0001] The present invention relates to the technical field of uplift anchor rods, and particularly to a construction process for a partially bonded prestressed uplift glass fiber anchor rod pile to avoid stress concentration parts. Background Art

[0002] At present, when designing uplift anchor rods, people usually find relatively good strata and design the same length, and think there is nothing wrong. In fact, this design is not perfect. When encountering a stratum with well-developed horizontal bedding, it becomes unreasonable. When the water level rises, the buoyancy increases, and it is possible to lift the entire horizontal stratum, resulting in the failure of the anti-floating design. This requires us to analyze specific problems specifically, make targeted designs, improve the drawbacks of current conventional designs, strive to avoid stress concentration, and take the anti-floating design to a new level.

[0003] In a corrosive environment, anti-corrosion design is also required. In addition to wrapping the rod body in the anchorage section with cement slurry or mortar for anti-corrosion, in a severely corrosive environment, the rod body in the anchorage section is commonly sheathed with a corrugated pipe, and the void inside the pipe is filled with epoxy resin or cement slurry. The thickness of the protective layer around the casing is not less than 10 mm. For the prior art invention patent "A composite anchor rod with a concrete rod body and its construction method" (CN201510360640.8), and the utility model patent "A composite anchor rod with a concrete rod body" (CN201520446623.1), they include: a concrete rod body, a rod bone pipe, a grouting body, rod reinforcement, and a positioning and guiding device; the upper end is a pressed flower anchor type or a wedge anchor type anchor. Its construction method is to first press-grout a concrete plain pile, then implant a steel pipe (rod bone pipe), then lower the steel strand, inject cement slurry, use the steel pipe to protect the steel strand inside, and there is a relatively thick plain concrete protective layer outside. It seems to be double-layer anti-corrosion, but actually, upon careful analysis, it will be found that because a long spiral press-grouting plain concrete pile is used, the diameter is generally not less than 400 mm, which is thicker than the conventional anchor rod of 150 - 200 mm, and the side friction resistance is larger. The uplift force borne by a single anchor rod pile is correspondingly higher, and the total number of roots is reduced. In the case where the uplift bearing capacity of a single anchor rod pile is high, the steel pipe is bonded throughout its length, and its force-bearing characteristics are no different from those of an ordinary uplift pile anchor, which will cause the concrete around the steel pipe to crack. The design itself determines the characteristic that the outer concrete will inevitably crack when the uplift bearing capacity of a single anchor rod pile is high, which leads to the failure of the first anti-corrosion barrier. The second barrier is the steel pipe, and the anti-corrosion performance of an ordinary steel pipe is extremely limited. This leads to the result that although it seems to be double-layer protection, the effect is actually very limited. It can even be said that this is a design with congenital defects.

[0004] The partial bond prestressed technology is a relatively mature technology whether it is used for steel strands or steel bars. It can quickly transfer buoyancy or uplift force to the lower part of the pile or anchor. During the uplift process, a wedge effect is formed at the lower part, and it becomes tighter as it is pulled. Just by changing the structure of the cage, the stress characteristics are changed, bringing the benefit that the bearing capacity is greatly improved with the same pile length or the same anchor rod length. At the same time, it can also be designed according to the first-level crack resistance. It is a good technology and its technical advantages should be further exploited.

[0005] The outstanding advantages of glass fiber rod or tube are high strength, especially high tensile strength, light weight, convenient for transportation and handling, and good corrosion resistance. It can be summarized as high strength, light weight and corrosion resistance. Its weight is only 1 / 4 of that of steel bars of the same volume, and its tensile strength is 20% higher than that of steel bars of the same specification. Its coefficient of thermal expansion is closer to that of cement compared with steel, so it has a stronger bonding and wrapping force with concrete, mortar, cement slurry, etc. Its processing performance is also very good. These properties are exactly what the anti-pull anchor rod needs in a corrosive environment.

[0006] It should be noted that the above content belongs to the technical cognition scope of the inventor and does not necessarily constitute the prior art. Summary of the Invention

[0007] The purpose of the present invention is to provide a construction process for a partial bond prestressed anti-pull glass fiber anchor rod pile that avoids stress concentration in view of the deficiencies of the prior art, so as to solve the problems raised in the background art.

[0008] To achieve the above purpose, the present invention provides the following technical solution: a construction process for a partial bond prestressed anti-pull glass fiber anchor rod pile that avoids stress concentration, including the following steps:

[0009] Step 1: Implement management measures for the construction site, including balance of plane layout, personnel arrangement, material reserve, and smooth communication;

[0010] Step 2: According to the design drawings, complete measurement, setting out, and determination of the anchor rod pile positions. The specific steps are as follows: Select steel bars to drill holes at the anchor positions, use lime for marking, and insert wooden sticks for marking if necessary. The anchor rod pile positions of one building should be set out at one time, and subsequent processes can be carried out only after being jointly inspected and accepted by the supervisor and the construction party without error;

[0011] Step 3: Implement drilling operations through a long auger drill. On the premise that there is no hole collapse phenomenon in the formation, after drilling to the design depth, lift the drill tool out of the hole;

[0012] Step 4: Detect the borehole diameter, depth, verticality, and thickness of the virtual soil at the bottom of the hole. After meeting the requirements, the processed glass fiber rod cage can be hoisted into the hole;

[0013] Step 5: Use the primary grouting pipe to grout cement slurry to the design elevation. When necessary, secondary supplementary grouting is required until the design grouting volume is reached;

[0014] The steps for preparing the cement slurry are as follows: Select the raw materials for the cement slurry, repeatedly determine its ratio and then inject them into a mixer for mixing. Subsequently, filter through a fixed sieve and start the grouting pump to achieve pumping;

[0015] Step 6: Move the machine to adjust the level and verticality again, and use a long auger drill to construct the next anchor rod pile;

[0016] Step 7: After the anchor rod pile construction is completed and cured to reach the age, it can be tested. After passing the test, tension and lock it, and tighten the nut to the design torque value;

[0017] It is preferred to place the locking device at the top of the anchor rod pile, and the extended part is anchored into the bottom plate. It is also possible to place the locking device at the reserved position in the upper half of the bottom plate. After locking, fill the reserved pit with anti-seepage concrete;

[0018] When the stress condition is good, there is a certain amount of overburden soil designed on the bottom plate. At this time, the locking device can be placed above the bottom plate, and after locking, directly carry out the overburden soil;

[0019] As a preferred technical solution of the present invention, the implementation steps of the plane layout balance in the management measures are as follows:

[0020] According to the construction drawings and project requirements, plan a reasonable construction area, warehouse, office area and living area to ensure smooth traffic between each area;

[0021] Set up safe and unobstructed access channels to ensure the unhindered flow of personnel and materials;

[0022] By setting clear signs and indicators, help construction personnel quickly understand the layout of the construction site. For various facilities such as long auger drills, they can be quickly positioned during the construction process;

[0023] The implementation steps of the personnel arrangement balance are as follows:

[0024] According to the construction requirements and progress, clarify the responsibilities and work tasks of each position;

[0025] According to different types of work and processes, reasonably arrange the number of construction personnel to ensure that there are enough personnel in the operation area to guarantee the construction progress;

[0026] All construction personnel need to receive construction training to ensure that they can master the necessary operating specifications;

[0027] According to the construction progress and on-site conditions, adjust the personnel arrangement in real time to avoid the situation of unbalanced human resources;

[0028] The implementation steps for material reserve balance are as follows:

[0029] Based on the construction plan and the material requirements of each process, formulate a detailed material procurement and supply plan;

[0030] Advance reserve the main materials required to ensure that the construction period will not be delayed due to material shortages during the construction process;

[0031] Regularly check the material inventory and replenish it in time if shortages or damages are found.

[0032] As a preferred technical solution of the present invention, the implementation steps for smooth communication are as follows:

[0033] Ensure that all on-site management personnel and construction workers can communicate effectively and quickly through devices such as landline phones, walkie-talkies, and mobile phones;

[0034] Establish a clear information transmission channel to ensure that all decisions and instructions during the construction process can be quickly conveyed.

[0035] As a preferred technical solution of the present invention, the diameter of the glass fiber rod is controlled within 20 - 50 mm, and the diameter of the anchor rod hole needs to be controlled within 150 - 200 mm. Its arrangement is as follows: The odd-numbered anchor rods in the first row, such as 1, 3, 5, 7, 9, are designed to be long, and the even-numbered anchor rods, such as 2, 4, 6, 8, 10, are designed to be short. The corresponding second row is arranged at intervals, and the third row, the fourth row, and so on follow this pattern.

[0036] As a preferred technical solution of the present invention, before the long auger drill rig is in place, it is required that the site be leveled and solid, and meet the construction verticality requirements. After the drill rig is in place at the designated position, under the guidance of technical personnel, adjust the angles of the mast and drill pipe, and use the cross method to align the hole position.

[0037] As a preferred technical solution of the present invention, the lower half of the glass fiber rod cage is a threaded structure, and this structure has adhesion with the cement slurry. The upper half of the glass fiber rod cage is coated with butter and then externally wrapped with a plastic jacket, and both ends of the plastic jacket are tied with wire to prevent the cement slurry from entering and ensure that this section is non-bonded;

[0038] The glass fiber rod cage adopts the same structure as the common steel reinforcement cage, and a centering support is provided every 1.5 - 2 meters. The support is made of corrosion-resistant plastic material.

[0039] As a preferred technical solution of the present invention, the primary grouting pipe and the secondary grouting pipe are respectively located in the internally reserved cavities. The secondary grouting pipe is made of glass fiber and is not recycled. When necessary, it can be used for split grouting.

[0040] As a preferred technical solution of the present invention, during the drilling operation of the long auger drill, when the phenomenon of hole collapse occurs in the formation, the following steps are adopted:

[0041] 1) Complete the opening identification and slump measurement at the position of the hole collapse;

[0042] 2) Transport the concrete to the on-site pump, and connect the drilling rig perfusion hose to the pump;

[0043] 3) After the bottom valve of the drill tool is flushed open by pumping concrete, lift the pile pipe to the design elevation while pumping concrete;

[0044] 4) Lift the drill tool, insert the glass fiber cage into the concrete until the design depth, and lift the vibratory hammer away from the anchor rod pile opening;

[0045] 5) Move the machine to adjust the level and verticality again, and use the long auger drill to construct the next anchor rod pile.

[0046] Compared with the prior art, the present invention provides a construction process for a partially bonded prestressed anti-pulling glass fiber anchor rod pile that avoids stress concentration, and has the following beneficial effects:

[0047] This construction process for a partially bonded prestressed anti-pulling glass fiber anchor rod pile that avoids stress concentration adopts an arrangement method that avoids stress concentration, showing its superiority in the formation with developed horizontal bedding; at the same time, it uses a glass fiber material with good corrosion resistance to meet the requirements of anti-floating anchor rods under corrosion conditions; it adopts a design of partial bonded prestress, changing the force-bearing characteristic of the traditional anti-pulling anchor rod of "loosening more and more when pulled" to a force-bearing characteristic of "tightening more and more like a wedge". For anchor rods of the same length and diameter, the bearing capacity is greatly improved, and according to relevant test data, it can be increased by 80%. Its economic benefit advantage is obvious. Also, due to the adoption of the design concept of anchor rod piles, the concept of piles can be adopted during acceptance, greatly reducing the number of inspections, saving both inspection costs and inspection time, and improving efficiency;

[0048] For the same bearing capacity, fewer anchor rod piles can be arranged, or for the same number of piles, the pile length or pile diameter can be reduced. There are not only savings in concrete, mortar, cement, and labor costs, but also due to advantages such as improved efficiency and construction civilization, the savings brought by only the increase in bearing capacity can account for more than about 20% of the total cost. The key is to avoid concentrated stress and extend the service life of the superstructure. The economic benefits are significant, and the social and environmental benefits are obvious. Description of the Drawings

[0049] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0050] Figure 1This is the construction flow chart of the prestressed anti-pulling glass fiber anchor rod pile with bonded stress concentration avoidance part in a non-caving state for the present invention;

[0051] Figure 2 This is the construction flow chart of the prestressed anti-pulling glass fiber anchor rod pile with bonded stress concentration avoidance part in a caving state of the formation for the present invention;

[0052] Figure 3 This is the schematic plan view of the layout state of the anchor rod pile for the present invention;

[0053] Figure 4 This is the schematic sectional view of the anchor rod pile for the present invention;

[0054] Figure 5 This is the schematic view of the state where prestress is applied to the end of the anchor rod pile for the present invention;

[0055] Figure 6 This is the schematic view of the state where prestress is applied to the small pit reserved on the upper part of the bottom plate for the present invention;

[0056] Figure 7 This is the schematic view of the state where prestress is applied to the upper surface of the bottom plate for the present invention. Specific embodiments

[0057] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0058] Please refer to Figure 1-7 :

[0059] Embodiment 1, the construction process of the prestressed anti-pulling glass fiber anchor rod pile with bonded stress concentration avoidance part, includes the following steps:

[0060] Step 1: Implement management measures for the construction site, including balance of plane layout, personnel arrangement, material reserve, and smooth communication;

[0061] The implementation steps of the balance of plane layout in the management measures are as follows:

[0062] According to the construction drawings and project requirements, plan reasonable construction areas, warehouses, office areas, and living areas to ensure unobstructed traffic between each area;

[0063] Set safe and unobstructed access channels to ensure the unimpeded flow of personnel and materials;

[0064] By setting clear signs and indicator boards, help construction personnel quickly understand the layout of the construction site, and various facilities such as long auger drills can be quickly positioned during the construction process;

[0065] The implementation steps for personnel arrangement balance are as follows:

[0066] Based on the construction requirements and progress, clarify the responsibilities and work tasks of each position;

[0067] According to different types of work and processes, reasonably arrange the number of construction personnel to ensure that there are enough personnel in the operation area to guarantee the construction progress;

[0068] All construction personnel need to receive construction training to ensure that they can master the necessary operating specifications;

[0069] According to the construction progress and on-site conditions, adjust the personnel arrangement in real time to avoid the situation of unbalanced human resources;

[0070] The implementation steps for material reserve balance are as follows:

[0071] Based on the construction plan and material requirements of each process, formulate a detailed material procurement and supply plan;

[0072] Reserve the required main materials in advance to ensure that the construction period will not be delayed due to material shortages during the construction process;

[0073] Regularly check the material inventory and replenish it in time if shortages or damages are found;

[0074] The implementation steps for smooth communication are as follows:

[0075] Ensure that all on-site management personnel and construction personnel can communicate effectively and quickly through devices such as landlines, walkie-talkies, and mobile phones;

[0076] Establish a clear information transmission channel to ensure that all decisions and instructions during the construction process can be quickly conveyed;

[0077] Step 2: According to the design drawings, complete the measurement, setting out, and determination of the anchor rod positions. The specific steps are as follows: Select steel bars to drill holes at the anchor positions, use lime for marking, and insert wooden sticks for marking if necessary. The anchor rod positions of one building block need to be set out at one time, and the subsequent processes can be carried out only after being jointly inspected and approved by the supervisor and the construction party;

[0078] The diameter of the fiberglass rod is controlled within 20 - 50 mm, and the diameter of the anchor rod hole needs to be controlled within 150 - 200 mm. The arrangement method is as follows: The odd-numbered anchor rods in the first row, such as 1, 3, 5, 7, 9, are designed to be long, and the even-numbered anchor rods, such as 2, 4, 6, 8, 10, are designed to be short. The second row is arranged at intervals, and the third row and the fourth row follow the same pattern;

[0079] Step 3: Implement the drilling operation through a long auger drill. On the premise that there is no hole collapse in the formation, after drilling to the designed depth, lift the drill tool out of the hole;

[0080] Before the long auger drill rig is positioned, it is required that the site be leveled and solid, and meet the construction verticality requirements. After the drill rig is positioned at the designated location, under the guidance of technicians, adjust the angles of the mast and drill pipe. When aligning the hole position, use the cross method to center the hole position;

[0081] Step 4: Detect the borehole diameter, hole depth, verticality and the thickness of the virtual soil at the bottom of the hole. After meeting the requirements, the completed glass fiber rod cage can be hoisted into the hole;

[0082] The lower half of the glass fiber rod cage is a threaded structure, which has adhesion with the cement slurry. The upper half of the glass fiber rod cage is coated with butter and then wrapped with a plastic outer sleeve, and both ends of the plastic outer sleeve are tied with wire to prevent the cement slurry from entering and ensure that this section is non-bonded;

[0083] The glass fiber rod cage adopts the same structure as the common steel bar cage, and a centering support is set every 1.5 - 2 meters. The support is made of corrosion-resistant plastic material;

[0084] Step 5: Use the primary grouting pipe to inject cement slurry to the designed elevation. When necessary, secondary supplementary grouting is required to reach the designed grouting volume;

[0085] The preparation steps of the cement slurry are as follows: Select the raw materials of the cement slurry, repeatedly determine its ratio and then inject them into the mixer for mixing. Subsequently, start the grouting pump after filtering through a fixed sieve to achieve pumping;

[0086] The primary grouting pipe and the secondary grouting pipe are respectively located in the inner reserved cavity. The secondary grouting pipe is made of glass fiber and is not recovered. When necessary, it can be used for split grouting;

[0087] Step 6: Move the machine and adjust the level and verticality again, and use the long auger drill rig to construct the next anchor rod pile;

[0088] Step 7: After the anchor rod pile is constructed and cured to reach the age, it can be detected. After passing the inspection, tension and lock it, and tighten the nut to the designed torque value;

[0089] It is preferred to place the locking device at the top of the anchor rod pile, and the extended part is anchored into the bottom plate. It is also possible to place the locking device at the reserved position in the upper half of the bottom plate. After locking, fill the reserved pit with anti-seepage concrete;

[0090] When the stress condition is good, there is a certain amount of overburden soil designed on the bottom plate. At this time, the locking device can be placed above the bottom plate, and after locking, directly cover the soil;

[0091] Example 2, Construction technology of bonded prestressed anti-pulling glass fiber anchor rod pile for avoiding stress concentration part, includes the following steps:

[0092] Step 1: Implement management measures at the construction site, including balance of layout, personnel arrangement, material reserve, and smooth communication;

[0093] The implementation steps for balance of layout in management measures are as follows:

[0094] According to the construction drawings and project requirements, plan reasonable construction areas, warehouses, office areas, and living areas to ensure smooth traffic between areas;

[0095] Set up safe and unobstructed access channels to ensure the unimpeded flow of personnel and materials;

[0096] By setting clear signs and indicators, help construction personnel quickly understand the construction site layout. For various facilities such as long auger drills, they can be quickly positioned during the construction process;

[0097] The implementation steps for balance of personnel arrangement are as follows:

[0098] According to the construction requirements and progress, clarify the responsibilities and tasks of each position;

[0099] According to different types of work and processes, reasonably arrange the number of construction personnel to ensure that there are enough personnel in the operation area to guarantee the construction progress;

[0100] All construction personnel need to receive construction training to ensure that they can master the necessary operating specifications;

[0101] According to the construction progress and on-site conditions, adjust the personnel arrangement in real time to avoid the situation of unbalanced human resources;

[0102] The implementation steps for balance of material reserve are as follows:

[0103] According to the construction plan and material requirements of each process, formulate a detailed material procurement and supply plan;

[0104] Reserve the required main materials in advance to ensure that the construction period will not be delayed due to material shortages;

[0105] Regularly check the material inventory and replenish in time if shortages or damages are found;

[0106] The implementation steps for smooth communication are as follows:

[0107] Ensure that all on-site management personnel and construction personnel can communicate effectively and quickly through devices such as landlines, walkie-talkies, and mobile phones;

[0108] Establish clear information transmission channels to ensure that all decisions and instructions during the construction process can be quickly conveyed;

[0109] Step 2: According to the design drawings, complete the measurement, setting out the lines, and determining the positions of anchor bolts. The specific steps are as follows: Select steel bars to drill holes at the anchor positions, use lime for marking, and insert wooden sticks for marking if necessary. The positions of the anchor bolts for one building block need to be set out at one time, and subsequent processes can only be carried out after the joint acceptance by the supervisor and the construction party is correct;

[0110] The diameter of the fiberglass rod is controlled within 20 - 50 mm, and the diameter of the anchor bolt hole needs to be controlled within 150 - 200 mm. The arrangement is as follows: In the first row, the odd-numbered anchor bolts 1, 3, 5, 7, 9 are designed to be long, and the even-numbered anchor bolts 2, 4, 6, 8, 10 are designed to be short. Accordingly, the second row is arranged at intervals, and the third row and the fourth row follow this pattern;

[0111] Step 3: Perform the drilling operation through a long - auger drill, and complete the opening inspection and slump measurement at the caving position;

[0112] Before the long - auger drill is in place, it is required that the site be leveled and solid, and meet the construction verticality requirements. After the drill is in place at the designated position, under the guidance of technical personnel, adjust the angles of the mast and the drill pipe, and use the cross - intersection method to align the hole position;

[0113] Transport the concrete to the on - site pump, and connect the perfusion hose of the drill to the pump;

[0114] After the concrete is pumped and the bottom valve of the drill tool is flushed open, lift the pile pipe while pumping the concrete until the design elevation is reached;

[0115] Lift the drill tool, insert the fiberglass cage into the concrete until the design depth, and lift the vibrating hammer away from the anchor bolt pile opening;

[0116] The lower half of the fiberglass rod cage is a threaded structure, which has adhesion with the cement slurry. The upper half of the fiberglass rod cage is smeared with butter and then wrapped with a plastic outer sleeve, and both ends of the plastic outer sleeve are tied with wire to prevent the cement slurry from entering and ensure that this section is non - adhesive;

[0117] The fiberglass rod cage adopts the same structure as the common steel bar cage, and a centered support is set every 1.5 - 2 meters. The support is made of corrosion - resistant plastic material

[0118] Move the machine and adjust the level and verticality again, and use the long - auger drill to construct the next anchor bolt pile.

[0119] Each embodiment in this specification is described in a progressive manner. For the same or similar parts between each embodiment, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the description of the method embodiment.

[0120] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Avoid stress concentration in the partially bonded prestressed anti-pulling glass fiber anchor pile construction process, which is characterized by: The steps include: Step 1: Implement management measures for the construction site, including balanced layout, balanced personnel arrangements, balanced material reserves and smooth communications; Step 2: According to the design drawings, complete the measurement, layout and determination of anchor pile positions. The specific steps are as follows: Use steel bars to drill holes on the anchor positions, use white lime to mark them, and insert wooden sticks to mark them if necessary. The anchor pile positions of a building need to be laid out at one time, and the subsequent processes can only be carried out after the joint acceptance by the supervisor and the construction party; Step 3: Use a long spiral drill to drill holes. On the premise that the formation does not collapse, drill to the designed depth and then pull the drill out of the hole. Step 4: Check the borehole diameter, hole depth, verticality and the thickness of the loose soil at the bottom of the hole. Once the requirements are met, the processed fiberglass rod cage can be hoisted into the hole; Step 5: Use the primary grouting pipe to inject cement slurry to the designed elevation. If necessary, secondary grouting is required to reach the designed grouting volume; The steps of preparing cement slurry are as follows: selecting cement slurry raw materials, repeatedly determining their proportions, injecting them into a mixer for mixing, then filtering through a fixed screen and starting a grouting pump to achieve pumping; Step 6: Move the machine to adjust the horizontal and vertical positions again, and use the long spiral drill to construct the next anchor pile; Step 7: After the anchor pile is constructed and maintained to the age, it can be inspected. After passing the inspection, tighten the nut to the designed torque value by tensioning and locking. It is preferred to place the locking device on the top of the anchor pile and anchor the extended part into the bottom plate. The locking device can also be placed in the reserved position in the upper part of the bottom plate. After locking, fill the reserved pit with anti-seepage concrete. When the stress condition is good, a certain amount of soil is designed to cover the bottom plate. At this time, the locking device can be placed above the bottom plate, and the soil can be directly covered after locking.

2. The construction process of prestressed anti-pulling glass fiber anchor piles with partial bonding to avoid stress concentration according to claim 1, characterized in that: The steps for implementing the layout balance in the management measures described in step 1 are as follows: According to the construction drawings and project requirements, plan the construction area, warehouse, office area and living area reasonably to ensure smooth traffic between the areas; Set up safe and unobstructed access channels to ensure the unimpeded flow of personnel and materials; By setting up clear signs and signs, construction workers can quickly understand the layout of the construction site, and various facilities such as long spiral drills can be quickly put in place during the construction process; The steps for implementing the balance of personnel arrangements are as follows: According to the construction requirements and progress, clarify the responsibilities and tasks of each position; Reasonably arrange the number of construction personnel according to different types of work and processes to ensure that there are enough personnel in the work area to ensure the construction progress; All construction workers need to receive construction training to ensure they can master the necessary operating specifications; Adjust personnel arrangements in real time according to construction progress and on-site conditions to avoid imbalance in human resources; The material reserve balance implementation steps are as follows: Develop detailed material procurement and supply plans based on the construction plan and material requirements of each process; Reserve the main materials needed in advance to ensure that the construction period will not be delayed due to shortage of materials; Check material inventory regularly and replenish it promptly if any shortage or damage is found.

3. The construction process of prestressed anti-pulling glass fiber anchor piles with partial bonding to avoid stress concentration according to claim 1, characterized in that: The steps for implementing the smooth communication described in step 1 are as follows: Ensure that all managers and construction workers on site can communicate effectively and quickly through landline phones, intercoms, mobile phones and other devices; Establish clear information channels to ensure that all decisions and instructions during the construction process can be communicated quickly.

4. The construction process of prestressed anti-pulling glass fiber anchor piles with partial bonding to avoid stress concentration according to claim 1, characterized in that: In step 2, the diameter of the fiberglass rod is controlled at 20-50 mm, and the diameter of the anchor hole needs to be controlled at 150-200 mm. The arrangement is as follows: the odd-numbered anchor rods of 1, 3, 5, 7, and 9 in the first row are designed to be long, and the even-numbered anchor rods of 2, 4, 6, 8, and 10 are designed to be short. The corresponding second row is arranged at intervals, and the third and fourth rows are arranged in the same way.

5. The construction process of partially bonding prestressed anti-pulling glass fiber anchor piles to avoid stress concentration according to claim 1, characterized in that: Before the long spiral drilling rig described in step three is put into place, the site must be flat and solid, and meet the construction verticality requirements. After the drilling rig is in place according to the specified position, under the guidance of technical personnel, the angles of the mast and drill rod are adjusted, and the hole position is centered crosswise.

6. The construction process of partially bonding prestressed anti-pulling glass fiber anchor piles to avoid stress concentration according to claim 1, characterized in that: The lower part of the fiberglass rod cage in step 4 is a threaded structure, which is bonded to the cement slurry. The upper part of the fiberglass rod cage is coated with butter and then covered with a plastic jacket. Both ends of the plastic jacket are tied with wire to prevent cement slurry from entering, ensuring that this length is unbonded. The fiberglass rod cage adopts the same structure as the common steel bar cage, and a central bracket is arranged every 1.5-2 meters, and the bracket is made of corrosion-resistant plastic material.

7. The construction process of prestressed anti-pulling glass fiber anchor piles with partial bonding to avoid stress concentration according to claim 1, characterized in that: The primary grouting pipe and the secondary grouting pipe described in step five are respectively located in the cavities reserved inside. The secondary grouting pipe is made of glass fiber and is not recycled. It can be used for splitting grouting when necessary.

8. The construction process of prestressed anti-pulling glass fiber anchor piles with partial bonding to avoid stress concentration according to claim 1, characterized in that: When the ground collapses during the long spiral drilling operation described in step 3, the following steps are adopted: 1) Complete the opening identification and slump measurement of the collapsed hole location; 2) Transport the concrete to the on-site ground pump and connect the drilling rig injection hose to the ground pump; 3) After the valve at the bottom of the drill bit is opened by pouring concrete, the pile pipe is lifted to the designed elevation while pouring concrete; 4) Lift the drill bit, insert the fiberglass cage into the concrete to the designed depth, and lift the vibrating hammer away from the anchor pile mouth. 5) Move the machine and adjust the horizontal and vertical positions again, and use a long spiral drill to construct the next anchor pile.

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