Methods for compacting and jacking up industrial plant floors with excessive settlement and voids

Abstract

This invention relates to the field of building construction technology, and more specifically, to a method for compacting and lifting industrial plant floors with excessive settlement and voids. The method includes the following steps: Step 1: Based on the abnormal conditions of the industrial plant, investigate the industrial plant floor to determine the void areas; Step 2: Drill holes in the void areas to form grouting holes; Step 3: Arrange bearing piles or grout expansion chambers in the void areas to support and lift the industrial plant floor; Step 4: Prepare lightweight filling grout and inject it into the void areas through the grouting holes; Step 5: After grouting is completed, seal the grouting holes. This invention provides a method for compacting and lifting industrial plant floors with excessive settlement and voids, which can effectively fill voids, improve the bearing capacity of the foundation, and eliminate the problem of floor settlement.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and more specifically, to a method for compacting and jacking up industrial plant floors that have experienced excessive settlement and voiding. Background Technology

[0002] With the rapid development of industrial manufacturing, new energy, and new materials industries, industrial plants built on many filled or soft soil foundations are becoming increasingly larger, and the floor load is constantly increasing.

[0003] Building column foundations often use pile foundations, but ground slabs are generally treated with foundation treatment. Due to the consolidation and creep of unconsolidated fill and soft soil under ground load, the ground slab will continue to settle and deform under long-term use. The accumulation of slow settlement over a long period of time will seriously affect the normal use of the factory within 1-5 years.

[0004] Significant characteristics of industrial plant floor settlement: voids appear between the floor structure layer and the foundation soil layer, and the floor undergoes excessive settlement deformation under the use load, affecting the normal operation of factory machinery and equipment, and even causing accidents.

[0005] Currently, the main approach to controlling ground settlement is to address the problem of continuous ground subsidence. The most direct method is to grout and backfill the voids beneath the ground. However, conventional cement grouting, due to its high density, places a significant additional load on the foundation, potentially exacerbating ground settlement and causing secondary deformation, making it difficult to effectively control ground settlement. Summary of the Invention

[0006] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0007] To at least partially solve the above problems, the present invention provides a method for compacting and jacking up industrial plant floors with excessive settlement and voids, comprising the following steps:

[0008] Step 1: Based on the abnormal conditions of the industrial plant, investigate the industrial plant floor to identify areas of floor voids.

[0009] Step 2: Drill holes in the voided areas of the floor to create grouting holes;

[0010] Step 3: Install load-bearing piles or grout expansion chambers in the voided areas of the industrial plant floor to support and lift the floor.

[0011] Step 4: Prepare lightweight filler grout and inject it into the voided area of ​​the floor through the grouting holes;

[0012] Step 5: After grouting is completed through the grouting hole, seal the grouting hole.

[0013] Optionally, step one, based on the abnormal conditions of the industrial plant, involves investigating the industrial plant floor to determine the voided area. Specifically, this includes: scanning the abnormal area using geophysical exploration based on the abnormal conditions of the industrial plant, and determining the range and degree of voiding based on the waveform response of the differences in physical properties between the floor slab, the voided layer, and the soil layer.

[0014] Optionally, step one, investigating the industrial plant floor based on the abnormal conditions of the industrial plant to determine the void area, further includes: drilling observation holes in the industrial plant floor, inserting an endoscope into the observation holes, and taking pictures of the void area through the endoscope to determine the range and degree of void.

[0015] Optionally, after grouting through the grouting hole is completed, sealing the grouting hole specifically includes: after grouting is completed, sealing the grouting hole and the observation hole, filling the hole with cement slurry, and after smoothing with high-strength fast-hardening cement, grinding and cleaning the industrial plant floor, and repairing it in its original state with epoxy resin paint consistent with the original floor.

[0016] Optionally, step two, drilling holes in the voided area of ​​the floor to form grouting holes, specifically includes: using different drilling methods to drill grouting holes according to different strata; using diamond drill bits for industrial plant floors; and using small-diameter Luoyang shovels for drilling the soil layer under the industrial plant floors, with the drilling depth reaching below the bottom of the grouting hole layer.

[0017] Optionally, the lightweight filler grout is a lightweight foamed concrete grout. The preparation method of the lightweight foamed concrete grout is as follows: using PO42.5 cement, preparing the cement grout at a water-cement ratio of 0.5, and according to 10-20 kg / m³... 3 A lightweight foamed concrete slurry is prepared by adding a foaming agent and mixing. The density of the lightweight foamed concrete slurry is controlled at 0.5 t / m³. 3 Within this range, the strength is greater than 2 MPa.

[0018] Optionally, when injecting the lightweight filling grout into the voided area of ​​the floor through the grouting hole, the grouting pressure shall not be less than 0.5 MPa.

[0019] Optionally, when injecting lightweight filling grout into the voided area of ​​the floor through the grouting holes, the grouting construction shall start from the grouting hole at one end, with the adjacent grouting hole serving as an observation hole. The grout return situation shall be observed throughout the grouting process, and the grouting sequence shall be determined according to the distance of the grout return hole.

[0020] Optionally, the bearing pile is an anchor static pressure pile, a grout-solidified crushed stone steel pipe pile, or a grout expansion chamber. The bearing pile is pressed into the void area of ​​the ground by segmented static pressure or controlled grouting construction.

[0021] The method for controlling grouting construction is as follows: first, place the bladder and then inject grout under high pressure, thereby pressing it into the void area of ​​the ground.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] This invention provides a method for compacting and lifting industrial plant floors with excessive settlement and voids. It is applicable to situations where large-area settlement of the subgrade causes voids between the floor and foundation, resulting in floor settlement. The method effectively fills the voids, improves the bearing capacity of the foundation, and eliminates the problem of floor settlement. Based on geophysical exploration combined with drilling, endoscopy, and long-term monitoring of foundation and floor settlement, this invention determines the voids in the subgrade of the plant floor and repairs them by drilling and filling the voids with lightweight foamed concrete, thereby stopping the floor settlement. Through grouting reinforcement, the installation of anchor static pressure piles, or grout expansion chambers, the stability of the industrial plant floor is effectively improved.

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a process flow diagram of a method for compacting and jacking up an industrial plant floor with excessive settlement and voids, provided in an embodiment of the present invention.

[0027] Figure 2 A cross-sectional schematic diagram of a floor void situation provided in an embodiment of the present invention;

[0028] Figure 3 This is a cross-sectional schematic diagram of ground grouting backfill provided in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of a bearing pile provided in an embodiment of the present invention;

[0030] Figure 5 This is a cross-sectional structural schematic diagram of a bearing pile provided in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the grouting pipe provided in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the linkage mechanism provided in an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the reinforced skateboard provided in an embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram of the upper baffle mechanism provided in an embodiment of the present invention;

[0035] Figure 10 This is a schematic diagram of the lower baffle mechanism provided in an embodiment of the present invention;

[0036] Figure 11 This is a schematic diagram of the sealing mechanism provided in an embodiment of the present invention;

[0037] Figure 12 This is a schematic diagram of the enhanced clamping arm mechanism provided in an embodiment of the present invention.

[0038] Icons: Observation hole 1; Grouting hole 2; Bearing pile 3; Industrial plant floor 4; Floor void area 5; Square pile 6; Grouting pipe 7; Linkage mechanism 8; Linkage seat 801; Linkage body 802; Reinforced sliding plate 9; Upper baffle mechanism 10; Upper connecting pipe 1001; Upper sealing ring 1002; Upper buffer spring 1003; Upper baffle body 1004; Upper extension column 1005; Lower baffle mechanism 11; Lower connecting pipe 1101; Lower sealing ring 1102; Lower buffer spring 1103; Lower baffle body 1104; Lower extension column 1105; Longitudinal rack 1106; Sealing mechanism 12; Guide sleeve 1201; Sealing sliding plate 1202; Tension spring 1203; Guide shaft 1204; Reinforced locking arm mechanism 13; Gear 1301; Wheel axle 1302; Tilting locking arm 1303; Trapezoidal insert block 1304. Detailed Implementation

[0039] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0041] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0042] The following is in conjunction with the appendix Figure 1-12 The present invention will be described in further detail below.

[0043] Example 1

[0044] like Figure 1-12 As shown, the method for compacting and jacking up the floor of an industrial plant with excessive settlement and voids includes the following steps:

[0045] Step 1: Based on the abnormal conditions of the industrial plant, investigate the industrial plant floor 4 to identify the area 5 where the floor is loose;

[0046] Step 2: Drill holes in 5 locations in the voided area of ​​the floor to form 2 grouting holes;

[0047] Step 3: Install bearing piles 3 in the void area 5 of the floor to support and lift the industrial plant floor 4;

[0048] Step 4: Prepare lightweight filler grout and inject it into the voided area 5 of the floor through grouting hole 2;

[0049] Step 5: After grouting through grouting hole 2 is completed, seal grouting hole 2.

[0050] The working principle and beneficial effects of the above technical solution are as follows:

[0051] This invention provides a method for compacting and lifting industrial plant floors with excessive settlement and voids. It is applicable to situations where large-area settlement of the foundation beneath the industrial plant floor causes voids between the floor and the foundation, resulting in floor settlement. This method effectively fills the voids, improves the bearing capacity of the foundation, and eliminates the problem of floor settlement. During construction, the industrial plant floor (4) is first investigated based on the abnormal conditions of the industrial plant to identify the void areas (5). The method can be based on the site conditions of the industrial plant and long-term monitoring results of foundation and floor settlement. Geophysical exploration methods combined with on-site drilling and endoscopy were used to investigate the voiding situation. Depending on the actual site conditions, one or two methods such as ground-penetrating radar and ultrasonic sensors could be selected. In areas where geophysical exploration revealed anomalies, drilling combined with endoscopy was used for verification to determine the extent, depth, and degree of voiding under the factory floor. This effectively investigated the industrial factory floor 4 and identified the voiding area 5. After identifying the voiding area 5, holes were drilled at the voiding area 5 to form grouting holes 2, which can be used to... Based on the site layout of the factory and the void situation, the planar arrangement of the grouting holes was reasonably determined. Then, according to the previous arrangement of grouting hole 2, drilling was carried out on site. After drilling, the void situation was re-measured using an endoscope. Then, bearing piles 3 were installed in the void area 5 of the floor to support and lift the industrial plant floor 4. Finally, lightweight filling grout was prepared and injected into the void area 5 of the floor through grouting hole 2. During filling, grouting was carried out through a high-pressure grouting pipe. During the grouting process, the adjacent grouting hole 2 was re-examined. Grouting observation is performed, and the grouting spacing is adjusted according to the grout return situation. If the grout return is too fast or the hole spacing is too small, the grouting hole 2 should be plugged with cloth strips. After grouting through grouting hole 2 is completed, grouting hole 2 is sealed, and the hole is filled with cement grout to the ground. After it has basically solidified, the hole position of grouting hole 2 is smoothed with quick-hardening cement, and the ground is repaired to complete the entire grouting reinforcement process. After sealing the hole, the cement grout surface at the hole position is ground with a grinder to be level with the surrounding area. Epoxy resin paint is applied according to site requirements to restore the original appearance of the ground. This invention, based on the results of geophysical exploration combined with drilling, endoscopy, and long-term monitoring of foundation and ground settlement, determines the voids in the foundation under the factory floor. It uses drilling and filling of the voids with lightweight foamed concrete to repair the voids, thereby stopping the ground settlement. Through grouting reinforcement and the installation of anchor static pressure piles, the stability of the industrial factory floor is effectively improved.

[0052] Step one, based on the abnormal conditions of the industrial plant, involves investigating the industrial plant floor 4 to determine the void area 5. Specifically, this includes: using geophysical exploration to scan the abnormal area based on the abnormal conditions of the industrial plant; and determining the range and degree of voiding based on the waveform response of the differences in physical properties between the floor slab, the void layer, and the soil layer. This effectively improves the effectiveness and accuracy of the investigation of the industrial plant floor 4.

[0053] Step one, based on the abnormal conditions of the industrial plant, involves investigating the industrial plant floor 4 to determine the void area 5. This includes drilling observation holes 1 in the industrial plant floor 4 and inserting an endoscope into the observation holes 1 to photograph the void area 5 and determine the extent and degree of voiding. By photographing the void area 5 with the endoscope, combined with one or more methods such as ground-penetrating radar and ultrasonic sensors, the extent, depth, and degree of voiding in the foundation beneath the plant floor can be determined with high accuracy and good results.

[0054] After grouting through grouting hole 2 is completed, sealing grouting hole 2 is specifically included: after grouting is completed, grouting hole 2 and observation hole 1 are sealed. Cement slurry is used to fill the holes during sealing. After smoothing with high-strength and fast-hardening cement, the industrial plant floor 4 is ground and cleaned. Epoxy resin paint consistent with the original floor is used for original restoration.

[0055] Step two involves drilling holes in five areas of the voided floor to form grouting holes 2. Specifically, different drilling methods are used to drill the grouting holes 2 depending on the different strata being drilled. For the industrial plant floor 4, a diamond drill bit is used for drilling. For the soil layer under the industrial plant floor 4, a small-diameter Luoyang shovel is used for drilling. The drilling depth reaches below the bottom of the grouting hole 2.

[0056] The lightweight filler grout is a lightweight foamed concrete grout. The preparation method for the lightweight foamed concrete grout is as follows: use PO42.5 cement, prepare the cement grout at a water-cement ratio of 0.5, and adjust the concentration according to 10-20 kg / m³. 3 A lightweight foamed concrete slurry is prepared by adding a foaming agent and mixing. The density of the lightweight foamed concrete slurry is controlled at 0.5 t / m³. 3 Within a certain range, the strength is greater than 2 MPa. Using lightweight foamed concrete grout for filling results in a smaller additional load on the foundation, preventing exacerbation of foundation settlement and deformation, and effectively filling voids. The aforementioned lightweight filling grout, while ensuring strength, features low density and rapid setting.

[0057] When the lightweight filling grout is injected into the voided area 5 of the floor through the grouting hole 2, the grouting pressure shall not be less than 0.5 MPa.

[0058] When injecting lightweight filling grout into the void area 5 of the floor through the grouting hole 2, the grouting construction starts from the grouting hole 2 at one end, and the adjacent grouting hole 2 is used as the observation hole 1. The grout return situation is observed throughout the grouting process, and the grouting sequence is determined according to the distance of the grout return hole.

[0059] The bearing pile 3 is an anchored static pressure pile, a grout-bonded crushed stone steel pipe pile, or a grout-expanded slab. The bearing pile 3 is driven into the void area 5 of the ground surface through segmented static pressure or controlled grouting construction. The anchored static pressure pile (or grout-bonded crushed stone steel pipe pile or grout-expanded slab) uses steel pipe piles, precast PHC piles, or concrete square piles or slab bodies. Through segmented static pressure construction, the anchor piles support the ground surface load, and at the same time, the construction can also lift the ground surface.

[0060] Example 2

[0061] like Figure 1-12 As shown, the bearing pile 3 or grout expansion chamber includes a square pile body 6, a rotating grouting pipe 7 inside the central cavity of the square pile body 6, and two oppositely oriented threaded structures at both ends of the grouting pipe 7. The grouting pipe 7 is connected to the inner ends of two linkage mechanisms 8 through the two oppositely oriented threaded structures. The outer ends of the two linkage mechanisms 8 rotate relative to each other at the upper and lower ends of four reinforcing sliding plates 9. The middle of the four reinforcing sliding plates 9 is sealed and slides within four reinforcing slide tracks on the four sides of the square pile body 6. Each reinforcing sliding plate 9 is provided with multiple transverse grouting holes. An upper baffle machine is connected to the linkage mechanism 8 located at the upper end of the grouting pipe 7. Structure 10, with a lower baffle mechanism 11 connected to the linkage mechanism 8 at the lower end of the grouting pipe 7. Both the upper baffle mechanism 10 and the lower baffle mechanism 11 slide within the central cavity. A grouting chamber is formed between the square pile body 6, the grouting pipe 7, the upper baffle mechanism 10, and the lower baffle mechanism 11. The transverse grouting holes and the injection holes on the grouting pipe 7 are connected to the grouting chamber. Four sealing mechanisms 12 are connected within the central cavity of the square pile body 6. When the four reinforcing slide plates 9 slide out to the outer end of the square pile body 6, the four sealing mechanisms 12 can seal the inner ends of multiple transverse grouting holes of the four reinforcing slide plates 9.

[0062] The working principle and beneficial effects of the above technical solution are as follows:

[0063] In a method for compacting and lifting an industrial plant floor with excessive settlement and voids according to the present invention, the structural design of the bearing pile 3 provides better support and higher stability for the industrial plant floor 4. During use, the bearing pile 3 is pressed into the area to be installed, and then grout is injected into the grouting chamber through the grouting pipe 7. The grout flows through the grouting chamber into multiple transverse grouting holes of the four reinforcing slide plates 9, and then flows out through the multiple transverse grouting holes of the four reinforcing slide plates 9 into the voided area, effectively filling the voided area of ​​the bearing pile 3. When the area is filled to a certain extent, the grouting pipe 7 is rotated. The rotation of the grouting pipe 7 drives two linkage mechanisms through two oppositely oriented threaded structures. When the two linkage mechanisms 8 move in opposite directions, they can control the four reinforcing slide plates 9 to slide outwards within the four reinforcing slide tracks on the four sides of the square pile body 6. This controls the size of the four reinforcing slide plates 9 extending to the outer end of the square pile body 6 to increase the contact area between the four reinforcing slide plates 9 and the soil at the outer end, thereby improving the contact area between the bearing pile 3 and the soil. This is beneficial to improving the installation effect of the bearing pile 3 and the stability of the bearing pile 3 after installation. When the four reinforcing slide plates 9 slide out to the outer end of the square pile body 6, the four sealing mechanisms 12 can seal the inner ends of the multiple transverse grouting holes of the four reinforcing slide plates 9. At this time, grout continues to be injected into the grouting chamber through the grouting pipe 7. The grout can stay inside the bearing pile 3, strengthening the structural strength of the bearing pile 3.

[0064] The linkage mechanism 8 includes a linkage seat 801 and a linkage body 802. The linkage seat 801 is threadedly fitted onto the threaded structure of the grouting pipe 7. One end of each of the four linkage bodies 802 rotates on the linkage seat 801, and the other end of each of the four linkage bodies 802 is rotatably connected to one end of each of the four reinforcing slide plates 9.

[0065] When the grouting pipe 7 rotates, the thread structure of the grouting pipe 7 changes its contact position with the linkage seat 801, thereby driving the four connecting rod bodies 802 to push and pull the four reinforcing slide plates 9 through the linkage seat 801, controlling the position of the four reinforcing slide plates 9; in this invention, two linkage mechanisms 8 are provided, which is beneficial to improving the stability of the push and pull movement of the four reinforcing slide plates 9, and improving the stability of the four reinforcing slide plates 9 after movement.

[0066] The sealing mechanism 12 includes a guide sleeve 1201, which is fixed in the central cavity of the square pile 6. The sealing plate 1202 slides and engages in the groove of the guide sleeve 1201. One end of the sealing plate 1202 can press against the reinforcing plate 9, and the other end of the sealing plate 1202 is fixed with an outer stop. A tension spring 1203 is fixed between the outer stop and the inner stop fixed on the guide sleeve 1201. The tension spring 1203 is sleeved on the guide shaft 1204. One end of the guide shaft 1204 is fixed on the outer stop, and the middle part of the guide shaft 1204 slides on the inner stop. When the inner end face of the reinforcing plate 9 is coplanar with the inner side of the central cavity of the square pile 6, the sealing plate 1202 is blocked by the elastic force of the tension spring 1203 at the inner end of the reinforcing plate 9.

[0067] The outer stop block can move towards the inner stop block under the elastic force of the tension spring 1203. When the inner end face of the reinforcing slide plate 9 is coplanar with the inner side of the central cavity of the square pile body 6, the reinforcing slide plate 9 releases its obstruction to the sealing slide plate 1202. The sealing slide plate 1202 can slide in the guide sleeve 1201 under the drive of the outer stop block and the tension spring 1203, thereby sealing the inner end of the reinforcing slide plate 9 through the sealing slide plate 1202, realizing the sealing of multiple transverse grouting holes of the reinforcing slide plate 9, which facilitates stopping the injection of grout into the square pile body 6, and then injecting grout into the square pile body 6 to achieve different functions. Moreover, after sealing, it cannot automatically reset, and has good stability.

[0068] Example 3

[0069] like Figure 1-12 As shown, the upper baffle mechanism 10 includes an upper connecting pipe 1001, an upper sealing ring 1002, an upper buffer spring 1003, an upper baffle body 1004, and upper protruding columns 1005. The lower end of the upper connecting pipe 1001 is fixed to the linkage seat 801 of the upper connecting rod mechanism 8. The upper connecting pipe 1001 is sleeved on the outside of the grouting pipe 7. The upper sealing ring 1002 is fixed to the upper end of the upper connecting pipe 1001. The upper sealing ring 1002 slides and seals on the outside of the grouting pipe 7. The middle part of the upper connecting pipe 1001 slides and engages with the upper baffle body 1004. The upper baffle body 1004 slides and seals on the inner side of the central cavity of the square pile body 6. The upper sealing ring 1002 and the upper baffle body 1004 are fixedly connected by the upper buffer spring 1003. Multiple upper protruding columns 1005 are fixed to the upper end of the upper baffle body 1004. The middle parts of the multiple upper protruding columns 1005 slide in the upper through hole of the upper sealing ring 1002.

[0070] In a method for compacting and lifting industrial plant floors with excessive settlement and voids according to the present invention, the upper baffle mechanism 10 is structurally designed not only to form a grouting chamber with the square pile 6, grouting pipe 7, and lower baffle mechanism 11, but also to monitor the tightness of the injected grout to a certain extent. During use, after sealing multiple transverse grouting holes of the reinforcing slide plate 9, when grout is injected into the grouting chamber through the grouting pipe 7, when the grout is nearly full, it can generate upward pressure on the upper baffle body 1004. The upper baffle body 1004 can slide within the square pile 6 and compress the upper buffer spring 1003. The buffer spring 1003 improves the tightness of the grout injected into the grouting chamber. As the amount of grout injected increases, the upper baffle body 1004 slides upward a greater distance within the square pile body 6. The upper baffle body 1004 drives the multiple upper extension columns 1005 to extend above the upper sealing ring 1002, and the size of the extension columns 1005 above the upper sealing ring 1002 can be used to judge the tightness of the grout filling. In addition, the upper buffer spring 1003 can also effectively improve the stability of the linkage mechanism 8 after driving the reinforcing slide plate 9 to move, and the upper buffer spring 1003 plays a role in tensioning and limiting.

[0071] Example 4

[0072] like Figure 1-12 As shown, the lower baffle mechanism 11 includes a lower connecting pipe 1101, a lower sealing ring 1102, a lower buffer spring 1103, a lower baffle body 1104, and a lower protruding column 1105. The upper end of the lower connecting pipe 1101 is fixed to the lower end of the linkage seat 801 of the lower connecting rod mechanism 8. The lower connecting pipe 1101 is sleeved on the outside of the grouting pipe 7. The lower end of the lower connecting pipe 1101 is fixed with the lower sealing ring 1102, which slides and seals the grouting pipe. Outside the pipe 7, the lower connecting pipe 1101 slides and engages with the lower baffle body 1104 in the middle, and the lower baffle body 1104 slides and seals on the inner side of the central cavity of the square pile body 6; the lower sealing ring 1102 and the lower baffle body 1104 are fixedly connected by the lower buffer spring 1103; multiple lower protruding columns 1105 are fixed at the lower end of the lower baffle body 1104, and the middle of the multiple lower protruding columns 1105 slides in the lower through hole of the lower sealing ring 1102.

[0073] In a method for compacting and lifting industrial plant floors with excessive settlement and voids according to the present invention, the lower baffle mechanism 11 is structurally designed not only to form a grouting chamber with the square pile 6, grouting pipe 7, and upper baffle mechanism 10, but also to improve the tightness of the grout injected into the grouting chamber. During use, after sealing the multiple transverse grouting holes of the reinforcing slide plate 9, when grout is injected into the grouting chamber through the grouting pipe 7, when the grout is nearly full, it can generate downward pressure on the lower baffle body 1104. The lower baffle body 1104 can slide downward within the square pile 6, and exert downward pressure on the lower... The buffer spring 1103 is compressed, which improves the tightness of the grout injected into the grouting chamber. As the amount of grout injected increases, the lower baffle body 1104 slides downwards within the square pile body 6, and the lower baffle body 1104 drives multiple lower extension columns 1105 to extend to the lower sealing ring 1102. The setting of the lower buffer spring 1103 can also effectively improve the stability of the linkage mechanism 8 after driving the enhanced sliding plate 9 to move. The upper buffer spring 1003 and the lower buffer spring 1103 work together to achieve better tensioning and limiting effect.

[0074] The bearing pile 3 also includes a reinforcing clamping arm mechanism 13. There are four reinforcing clamping arm mechanisms 13, which are connected around the four sides of the outer side of the square pile body 6. The lower ends of multiple downward protruding columns 1105 are fixed with linkage rings, and four longitudinal racks 1106 are evenly fixed around the linkage rings. The four longitudinal racks 1106 are connected to the inner ends of the four reinforcing clamping arm mechanisms 13 one by one.

[0075] As the amount of grout injected increases, the lower baffle body 1104 slides downwards within the square pile body 6. At this time, multiple downward-extending columns 1105 drive the linkage ring and the four longitudinal racks 1106 on the linkage ring to move downwards. When the four longitudinal racks 1106 move downwards, they can engage and drive the four reinforced clamping arm mechanisms 1 to flip and unfold upwards, thereby clamping into the soil and further improving the stability of the bearing pile 3 after installation. The deformation of this structure is automatically adjusted with the injection of grout, without the need for manual operation.

[0076] The enhanced locking arm mechanism 13 includes a gear 1301, a wheel axle 1302, a flipping locking arm 1303, and a trapezoidal plug 1304 with a triangular plug. The gear 1301 is fixed on the wheel axle 1302, which rotates in the mounting groove on the outer side of the square pile body 6. The inner end of the gear 1301 is meshed with a longitudinal rack 1106. One end of the flipping locking arm 1303 is fixed on the wheel axle 1302, and the other end of the flipping locking arm 1303 is fixed to one end of the trapezoidal plug 1304. The triangular plug of the trapezoidal plug 1304 is set downward. When the longitudinal rack 1106 on the linkage ring slides downward, the flipping locking arm 1303 can be flipped upward to be perpendicular to the square pile body 6 through the cooperation of the longitudinal rack 1106 and the gear 1301.

[0077] When the longitudinal rack 1106 moves downward, it can mesh with and drive the gear 1301 to rotate. When the gear 1301 rotates, it can drive the axle 1302 to rotate. When the axle 1302 rotates, it can drive the flipping arm 1303 to flip upward to a position perpendicular to the square pile body 6. At this time, the stability of the bearing pile 3 after installation can be effectively improved. Furthermore, the other end of the flipping arm 1303 is fixed to one end of the trapezoidal plug 1304, which can increase the contact area with the soil and improve the fixing effect. The triangular plug of the trapezoidal plug 1304 is set downward, so that when it is installed with the bearing pile 3, it can drill and break the soil to a certain extent, improving the effect of pressing the bearing pile 3 into the soil.

[0078] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0079] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0080] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. Method for densifying and jacking up the floor of an industrial plant that has excessive settlement and voids, characterized in that, It comprises the following steps: Step one, according to the abnormal situation of industrial plant, the floor (4) of industrial plant is explored to determine the floor void area (5); Step two, drilling at the floor void area (5) to form the grouting hole (2); Step three, arranging the bearing pile (3) or grouting expansion sac in the floor void area (5) to support and jack up the floor (4) of industrial plant; Step four, configuring light filling slurry and injecting the light filling slurry into the floor void area (5) through the grouting hole (2); Step five, after the completion of grouting through the grouting hole (2), the grouting hole (2) is closed. The light filling slurry is light foam concrete slurry. The bearing pile (3) comprises a square pile body (6), a rotating grouting pipe (7) in the central cavity of the square pile body (6), two thread structures with opposite rotation at both ends of the grouting pipe (7), the grouting pipe (7) is connected with the inner ends of two connecting rod mechanisms (8) through the two thread structures with opposite rotation, the outer ends of the two connecting rod mechanisms (8) are relatively rotated at the upper and lower ends of four enhanced sliding plates (9); the middle part of the four enhanced sliding plates (9) is sealingly slid in the four enhanced sliding ways on the four sides of the square pile body (6), a plurality of transverse through slurry holes are arranged on each enhanced sliding plate (9), the connecting rod mechanism (8) located at the upper end of the grouting pipe (7) is connected with an upper baffle mechanism (10), the connecting rod mechanism (8) located at the lower end of the grouting pipe (7) is connected with a lower baffle mechanism (11), the upper baffle mechanism (10) and the lower baffle mechanism (11) are slid in the central cavity, a grouting chamber is formed between the square pile body (6), the grouting pipe (7), the upper baffle mechanism (10) and the lower baffle mechanism (11), the transverse through slurry holes and the injection holes on the grouting pipe (7) are in communication with the grouting chamber, four sealing mechanisms (12) are matched and connected in the central cavity of the square pile body (6), when the four enhanced sliding plates (9) slide out to the outer end of the square pile body (6), the four sealing mechanisms (12) can seal the inner ends of the plurality of transverse through slurry holes of the four enhanced sliding plates (9).

2. The method of densifying and jacking up a settled and voided industrial plant floor of claim 1, wherein, The step one, according to the abnormal situation of industrial plant, the floor (4) of industrial plant is explored to determine the floor void area (5), specifically comprises: according to the abnormal situation of industrial plant, the abnormal area is scanned by using geophysical prospecting, based on the reaction of the physical property difference of the floor bottom plate, the void layer and the soil layer on the waveform, the void range and the void degree are judged.

3. The method of densifying and jacking up a settled and voided industrial plant floor of claim 2, wherein, The step one, according to the abnormal situation of industrial plant, the floor (4) of industrial plant is explored to determine the floor void area (5), further comprises: drilling an observation hole (1) on the floor (4) of industrial plant, inserting a endoscope into the observation hole (1), shooting the situation in the floor void area (5) through the endoscope, judging the void range and the void degree.

4. The method of densifying and jacking up a settled and voided industrial plant floor of claim 3, wherein, After the completion of grouting through the grouting hole (2), the grouting hole (2) is closed, specifically comprising: after the completion of grouting, the grouting hole (2) and the observation hole (1) are sealed, when sealing, cement slurry is filled, after the treatment of smoothing by using high-strength fast-hardening cement, the floor (4) of industrial plant is polished and cleaned, and the original repair is carried out by using epoxy resin paint consistent with the original floor.

5. The method of densifying and jacking up a settled and voided industrial plant floor of claim 1, wherein, The step two, drilling at the floor void area (5) to form the grouting hole (2), specifically comprising: according to the different stratum drilled, using different drilling methods to drill the grouting hole (2), using diamond drill bit to drill the industrial plant floor (4), using small diameter Luoyang shovel to drill the soil layer under the industrial plant floor (4), and the drilling depth reaches the bottom of the grouting hole (2) layer.

6. The method of densifying and jacking up a settled and voided industrial plant floor of claim 1, wherein, The method for preparing the light-weight foam concrete slurry is as follows: using P.O.42.5 cement, preparing the cement slurry according to water-cement ratio 0.5, and adding 10-20kg / m 3 The light-weight foam concrete slurry is prepared by adding the foaming agent and mixing, and the density of the light-weight foam concrete slurry is controlled within 0.5t / m 3 2MPa.

7. The method of densifying and jacking up a settled and voided industrial plant floor of claim 1, wherein, When the light filling slurry is injected into the floor void area (5) through the grouting hole (2), the grouting pressure is not less than 0.5 MPa.

8. The method of densifying and jacking up a settled and voided industrial plant floor of claim 1, wherein, When the light filling slurry is injected into the floor void area (5) through the grouting hole (2), the grouting construction adopts the method that the grouting hole (2) at one end is started, the adjacent grouting hole (2) is used as the observation hole (1), the return slurry condition is observed during the grouting process, and the grouting sequence is determined according to the distance of the return slurry hole.

9. The method of densifying and jacking up a settled and voided industrial plant floor of claim 1, wherein, The bearing pile (3) is pressed into the floor void area (5) by the construction method of segmented static pressure.

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