A device for adjusting uneven settlement of iron tower column foot and a method for supporting and lifting the tower column foot

Abstract

The present invention discloses a device for adjusting uneven settlement of a tower column foot and a method for supporting and lifting, a device for adjusting uneven settlement of a tower column foot, the tower column foot comprises a lower supporting column, the adjusting device comprises a fixed column, a fixed column foot flange, a plurality of adjusting pads and a plurality of telescopic oil cylinders, and a plurality of evenly distributed fixed anchor bolts are fixedly connected to the interior of the fixed column. The present invention can realize that when the tower column foot undergoes uneven settlement, the tower column foot can be quickly raised and lowered to adjust the tower column foot, so that the plurality of column feet of the tower are always in the same horizontal plane, thereby maintaining structural stability; it has pressure bearing and pull-out resistance functions, and can provide a large lifting force and withstand a large pull-out resistance during the lifting and lowering process of the column foot. After the column foot is adjusted to a predetermined height, it is convenient to fix and maintain long-term efficient operation; it can effectively adjust the uneven settlement of the foundation of a tall and large tower in an area with strong winds, and can be repeatedly adjusted according to the settlement conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of tower column foot and foundation reconstruction, and in particular relates to a tower column foot uneven settlement regulating device and a support and replacement lifting method. Background Art

[0002] The existing signal or transmission tower structure generally has four tower feet, and most of them adopt the load-bearing form of step-shaped independent foundation plus columns, which has good strength, rigidity and stability. However, in recent years, with the increasing breadth and depth of underground space development, the foundation of the existing tower will sink under the surrounding disturbance, and multiple tower column feet will show uneven settlement, which will increase the structural internal force and deformation of the upper tower, affecting safe use.

[0003] When uneven settlement occurs in the iron tower, its foundation or column foot needs to be lifted and adjusted to restore the consistent elevation. In some special cases, such as with the continued underground mining activities, this uneven settlement of the iron tower column foot will also occur repeatedly for a long time. However, the existing iron tower uneven settlement correction devices are mostly aimed at small iron tower structures, and require synchronous design and pre-embedded construction, which makes it difficult to correct the existing iron towers. At the same time, large iron towers have a long construction period and high construction cost. When uneven settlement occurs, it is difficult to dismantle and rebuild. Therefore, it is even more necessary to make certain modifications to the foundation and tower foot of the existing iron tower, and at the same time develop a tower column foot replacement lifting device system to meet the real-time correction needs of the column foot.

[0004] At present, the jacking and underpinning technology has been applied to some building foundation reconstruction, but it is rarely used in the lifting of tower foundations. At the same time, there are also some invention patents and attempts in the uneven settlement control project of towers, but they are mainly embedded devices and have not yet been promoted and applied in actual projects.

[0005] In the invention patent with the authorization announcement number CN106703091B and the name "A device for correcting uneven settlement of a transmission tower", a device for correcting uneven settlement of a transmission tower is disclosed. The lower end of the cylinder is fixedly connected to the concrete foundation, the upper end of the tooth column slidably arranged in the simplified body is fixedly connected to the node plate of the tower foot, and the rack on the tooth column is meshed with the large gear, and the large gear is driven by the small gear. In this way, when one of the tower feet of the tower settles, the large gear is driven to rotate by rotating the small gear, and then the large gear will drive the tooth column to move upward in the longitudinal direction, so that the lower end of the tooth column moves upward. When the pad hole between the tooth column and the concrete foundation can accommodate the steel pad of the set height, the steel pad is placed in the pad hole and filled between the concrete foundation and the lower end of the tooth column, so as to achieve the purpose of adjusting the height of the tooth column. In this way, the position of the node plate of the tower foot is raised by filling the steel pad at the lower end of the tooth column, thereby achieving the function of correction.

[0006] In the invention patent application with application publication number CN106760903A and titled “A transmission tower uneven settlement adjustment device”, a transmission tower uneven settlement adjustment device is disclosed, including a tower foot bearing component, a limit rod, a compression spring, a support pad, an anchor bolt and a locking nut; the tower foot of the transmission tower is installed and connected to the tower foot bearing component, the tower foot bearing component is erected on the limit column pre-embedded and fixed in the bottom of the transmission tower foundation through the limit column mounting hole, the tower foot bearing component is installed and connected to the transmission tower foundation through the anchor bolt and locking nut pre-embedded and fixed in the transmission tower foundation, and the compression spring is compressed and arranged between the bottom plane of the tower foot bearing component and the top plane of the transmission tower foundation, and is sleeved and installed on the anchor bolt or the limit column.

[0007] The prior art has the following problems:

[0008] 1) Existing uneven settlement correction devices are mainly pre-buried devices. They need to be designed, constructed and used simultaneously with the tower foundation, column foot and superstructure, and cannot correct the settlement of the column foot of an existing tower. Such as the gear lifting correction device in CN106703091B and the compression spring lifting device in CN106760903A. However, with the increasing development of underground space, the lifting correction of the column foot of an existing tower is becoming more and more important.

[0009] 2) Existing uneven settlement correction devices rarely take into account the possible overturning risk of the column foot during the correction process, and their safety is relatively low. Under normal working conditions, the tower foundation mainly bears vertical pressure, but in areas with strong winds such as the northwest and high altitudes, the tower column foot needs to provide a large pull-out resistance. For example, in the gear lifting correction device in CN106703091B, it relies on a single gear column for weighing, and its pull-out and bending strengths are insufficient. In the compression spring lifting device in CN106760903A, during the release of the compression spring height, the locking nut is loosened and cannot provide pull-out resistance.

[0010] 3) Existing uneven settlement correction devices are mainly for small towers and are difficult to adapt to large towers with high height and heavy mass. Large towers have high construction costs, great construction difficulties, long construction periods, and need to be kept in operation and difficult to interrupt. When underground space activities must be carried out near the tower, such as underground mining operations, measures must be taken to deal with the uneven settlement hazards that may occur at the tower foot.

[0011] Therefore, in view of the above technical problems, it is necessary to provide a device for adjusting the uneven settlement of the tower column foot and a supporting and lifting method. Summary of the invention

[0012] The object of the present invention is to provide a device for adjusting uneven settlement of a tower column foot and a supporting and lifting method to solve the above-mentioned problems.

[0013] In order to achieve the above purpose, the technical solution provided by an embodiment of the present invention is as follows:

[0014] A device for adjusting uneven settlement of a tower column foot. The tower column foot comprises a lower supporting column. The adjusting device comprises a fixed column, a fixed column foot flange, a plurality of adjustment pads and a plurality of telescopic oil cylinders.

[0015] A plurality of evenly distributed fixing anchor bolts are fixedly connected inside the fixing column, and the upper ends of the fixing anchor bolts are threadedly connected with fixing nuts;

[0016] The fixed column base flange is arranged on the upper side of the fixed column, and a bolt hole matching with a fixed anchor bolt is opened on the fixed column base flange, and the fixed anchor bolt passes through the bolt hole, and the upper end of the fixed column base flange is fixedly connected with a main rod, a secondary rod 1 and a secondary rod 2, and a rib plate is fixedly connected between the main rod and the fixed column base flange;

[0017] A plurality of adjustment pads are arranged between the fixed column foot flange and the fixed column;

[0018] A plurality of telescopic oil cylinders are arranged between the fixed column base flange and the lower supporting column, and the plurality of telescopic oil cylinders are used to realize the lifting and lowering of the fixed column base flange.

[0019] As a further improvement of the present invention, a plurality of inter-column stirrups are fixedly connected between the plurality of fixing anchor bolts.

[0020] As a further improvement of the present invention, a groove matching the fixing anchor bolt is formed on the adjusting pad, and a fastening bolt is connected between two adjacent adjusting pads.

[0021] As a further improvement of the present invention, the telescopic cylinder includes a cylinder barrel and a cylinder rod, an upper ear plate is fixedly connected to the fixed column base flange, a lower ear plate is fixedly connected to the lower supporting column, the telescopic cylinder is installed between the upper ear plate and the lower ear plate, and pins are connected between the lower ear plate and the cylinder barrel and between the cylinder rod and the upper ear plate.

[0022] As a further improvement of the present invention, the upper end of the lower supporting column is fixedly connected to a lower supporting plate, and the lower ear plate is fixedly connected to the lower supporting plate.

[0023] As a further improvement of the present invention, the telescopic cylinder has a self-locking function.

[0024] A replacement and lifting method based on an uneven settlement adjustment device for a tower column foot comprises the following steps:

[0025] S1. Install safety protection system

[0026] The safety protection system includes a ground anchor, a diagonal anchor cable and a diagonal plate. The ground anchor is buried underground to form a concrete anchoring structure buried deep underground to provide anchoring force for the entire safety protection system. The diagonal plate is fixed on the main rod, and the diagonal anchor cable is connected between the diagonal plate and the ground anchor.

[0027] S2. Renovation of the foundation

[0028] The existing foundation is expanded and reconstructed in order from bottom to top, forming expansion step 1, expansion step 2, expansion step 3 and lower supporting columns respectively;

[0029] A plurality of additional transverse connecting beams are fixedly connected between a pair of transverse connecting beams, and a plurality of additional longitudinal connecting beams are fixedly connected between a pair of longitudinal connecting beams;

[0030] S3. Install the adjustment device

[0031] Casting the fixed column in the lower supporting column so that the fixed column and the lower supporting column form an integral structure, wherein the portion of the fixed column located in the lower supporting column is a rectangular cross section, and the top of the fixed column is a circular cross section;

[0032] Install the lower support plate on the upper end of the lower support column, install the lower ear plate on the upper end of the lower support plate, then install the telescopic cylinder, the fixed column foot flange, the fixing nut in sequence, install the multi-layer adjustment pads on the fixed column, and fix them with fastening bolts;

[0033] S4. Debugging and inspection

[0034] The multiple telescopic cylinders are regulated by a movable telescopic cylinder control mechanism to achieve balanced support. The telescopic cylinder control mechanism is removed, the stability and reliability of all structures are checked, and the safety protection system is dismantled or not to complete the underpinning and lifting construction.

[0035] As a further improvement of the present invention, in S1, an adjustment fixture is installed on the ground anchor, and the lower end of the inclined anchor cable is connected to the adjustment fixture.

[0036] As a further improvement of the present invention, in S1, the inclined plate is welded and fixed on the main rod.

[0037] As a further improvement of the present invention, in S4, the telescopic cylinder control mechanism includes a hydraulic valve, a hydraulic pump and an engine.

[0038] Compared with the prior art, the present invention has the following advantages:

[0039] 1) When uneven settlement occurs on the tower column foot, the present invention can quickly adjust the tower column foot so that multiple tower column foots are always on the same horizontal plane, thereby maintaining structural stability;

[0040] 2) It has pressure-bearing and anti-pulling functions. During the lifting and lowering process of the column foot, it can provide a large lifting force and withstand a large anti-pulling force. After the column foot is adjusted to a predetermined height, it is easy to fix and maintain long-term efficient operation;

[0041] 3) It can effectively adjust the uneven settlement of the foundations of large and tall iron towers in areas with strong winds, and can be adjusted repeatedly according to the settlement conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 It is a structural schematic diagram of a device for adjusting uneven settlement of a tower column foot in one embodiment of the present invention;

[0044] Figure 2 It is a structural schematic diagram of the existing structure of the iron tower and the overall reconstruction foundation in one embodiment of the present invention;

[0045] Figure 3 It is a front cross-sectional view of an independent foundation after transformation in one embodiment of the present invention;

[0046] Figure 4 It is a top view of the transformed independent foundation in one embodiment of the present invention;

[0047] Figure 5 It is a structural schematic diagram of the installation process of a tower column foot uneven settlement regulating device in one embodiment of the present invention;

[0048] Figure 6 It is a partial cross-sectional view of an adjusting pad block of a device for adjusting uneven settlement of a tower column foot in one embodiment of the present invention;

[0049] Figure 7 The present invention is a schematic structural diagram of an installation of an uneven settlement regulating device for a tower column foot according to an embodiment of the present invention.

[0050] In the figure: 1- foundation part, 2- fixing system, 3- lifting system, 4- safety protection system, 11- independent foundation after transformation, 12- existing independent foundation 1, 13- existing independent foundation 2, 14- existing independent foundation 3, 15- horizontal connecting beam, 16- vertical connecting beam, 17- additional vertical connecting beam, 18- additional horizontal connecting beam, 19- main rod, 110- auxiliary rod 1, 111- auxiliary rod 2, 112- existing independent foundation, 113- existing anchor bolt, 114- existing column base flange, 115- expansion Large step one, 116-enlarged step two, 117-enlarged step three, 21-fixed column, 22-fixed anchor bolt, 23-stirrups between columns, 24-fixed column base flange, 25-adjusting pad, 26-fixing nut, 27-fastening bolt, 28-rib plate, 31-lower supporting column, 32-lower supporting plate, 33-lower ear plate, 34-cylinder barrel, 35-cylinder rod, 36-upper ear plate, 37-pin shaft, 41-inclined plate, 42-inclined anchor cable, 43-ground anchor, 44-adjusting fixture. DETAILED DESCRIPTION

[0051] The present invention will be described in detail below in conjunction with the various embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0052] An embodiment of the present invention discloses a tower column foot uneven settlement adjustment device and a supporting and lifting method. The structural schematic diagram of the existing tower column foot supporting and lifting device system involved in this embodiment is as follows: Figure 1 As shown, it mainly includes: foundation part 1, fixing system 2, lifting system 3, and safety protection system 4. When the tower column foot has uneven settlement and needs to be replaced and lifted, the safety protection system 4 must be installed first to ensure the absolute safety of the tower.

[0053] Then the foundation part 1 needs to be remodeled, and some devices in the fixing system 2 and the lifting system 3 need to be cast and embedded. The lifting system 3 provides support and pull-out resistance for the lifting of the tower column foot, and the fixing system 2 is fixed after the column foot is adjusted to the specified elevation.

[0054] Basic part 1, such as Figure 2 As shown in the figure, the overall structure diagram of the existing and modified foundation of the iron tower is shown. The foundation part includes the existing foundation and the modified foundation. The existing structure of the iron towers such as communication and power transmission towers is mostly four column feet, and an independent foundation is set under each column foot, and it is a stepped independent foundation, which is a first step, a second step, a third step and a column from bottom to top, as shown in the existing independent foundation 12, the existing independent foundation 2 13 and the existing independent foundation 3 14.

[0055] Normally, a horizontal connecting beam 15 and a vertical connecting beam 16 are arranged between the independent foundations. Above the independent foundation is the column foot structure of the iron tower, which includes a main rod 19, a secondary rod 110, and a secondary rod 2 111. The main rod 19 is fixed to the existing independent foundation 12 through the existing column foot flange 114 and the existing anchor bolt 113. The load of the upper iron tower structure is transmitted to the existing independent foundation 12 through the main rod 19. When underground space activities such as mining are carried out under the iron tower foundation, the column foot foundation undergoes uneven settlement and the iron tower column foot needs to be lifted and replaced, the device system proposed in the present invention can be used.

[0056] First, the existing tower foundation is renovated, which includes two parts. On the one hand, a number of longitudinal connecting beams 17 and transverse connecting beams 18 are added between the existing transverse connecting beams 15 and longitudinal connecting beams 16 to enhance the overall strength, rigidity and stability of the foundation, thereby improving the foundation's ability to resist stress and deformation caused by uneven settlement. On the other hand, the single independent foundation itself is renovated, such as the renovated independent foundation 11 in the figure, to provide space and attachment support for the installation of the fixing system 2 and the lifting system 3. The front section view and top view of the renovated independent foundation 11 are shown in Figure 1. Figure 3 , Figure 4 shown.

[0057] When the reconstructed independent foundation 11, the existing independent foundation one 12, the existing independent foundation two 13 and the existing independent foundation three 14 are reconstructed, the existing independent foundation 112, the existing anchor bolts 113, the existing column base flange 114, the main rod 19, the auxiliary rod one 110 and the auxiliary rod two 111 keep the original structural form unchanged, and when the foundation expansion construction is carried out, the contact surfaces need to be roughened in advance to ensure the connection strength.

[0058] The foundation expansion and reconstruction is carried out in order from bottom to top, which are enlarged step one 115, enlarged step two 116, enlarged step three 117, fixed columns 21, and lower supporting columns 31. The fixed columns 21 and lower supporting columns 31 are integral structures and are constructed simultaneously, but they are distinguished by cross-section in this figure.

[0059] The structure of the fixture system 2 is as follows: Figure 4 , Figure 5 As shown, the fixing device system mainly includes a fixing column 21, a fixing anchor bolt 22, a fixing column foot flange 24 and an adjusting pad 25 from top to bottom. The fixing column 21 is cast in situ when the independent foundation 11 is constructed and reconstructed, and the fixing anchor bolt 22 is pre-embedded and cast. The fixing column 21 is designed with an enlarged cross-section along the existing column, and the middle and lower parts still maintain a rectangular cross-section, and the top is designed to be cylindrical to facilitate the installation and operation of the lifting system 3.

[0060] The fixed anchor bolts 22 are vertical anchor bolts with a certain length, cross-sectional area and bearing capacity. They are arranged circumferentially around the existing anchor bolts 113 and the existing column base flanges 114 in the fixed columns 21. In this embodiment, eight fixed anchor bolts 22 are arranged circumferentially, and three layers of column stirrups 23 are arranged from bottom to top, namely, lower, middle and upper layers, to increase the overall stiffness.

[0061] The fixed anchor bolt 22 is a part of the length beyond the top of the fixed column 21 and is threaded. The fixed column foot flange 24 is located above the existing column foot flange 114 and is a disc flange with a certain thickness as a whole. Bolt holes corresponding to the fixed anchor bolt 22 are opened on the ring. It is welded to the main rod 19, the auxiliary rod 110 and the auxiliary rod 2 111 into a whole, and the rib plate 28 is welded for reinforcement. In the process of lifting and lowering the column foot, the existing anchor bolt 113 and the existing column foot flange 114 need to be disengaged first, and the fixed column foot flange 24 can slide up and down along the fixed anchor bolt 22.

[0062] When the column foot is adjusted to the specified elevation, a large gap will be formed between the fixed column foot flange 24 and the fixed column 21, and the shear strength is insufficient. At this time, it is necessary to fill it with an adjustment pad 25. In the vertical direction, the adjustment pad 25 is divided into several layers, each layer can have a different thickness, and the remaining gap can be filled with a thinner adjustment pad.

[0063] The arrangement and cross-sectional shape of the adjustment pad 25 are as follows: Figure 6 As shown, the middle of the adjustment pad 25 has two deep grooves, which can hold the fixing anchor bolt 22 in the middle. One end of the adjustment pad 25 has a bolt hole, and the four identical adjustment pads 25 on the same layer are connected to each other by fastening bolts 27 to form a semi-rigid whole. At the same time, when the fixed column base flange 24 is raised and lowered to the specified height, and the adjustment pad 25 is connected in place in the horizontal and vertical directions, the fixing nut 26 on the upper surface of the fixed column base flange 24 is tightened in place, thereby completing the construction of the entire fixing system 2.

[0064] The components and structure of the lifting device system 3 are shown in FIG. Figure 7 As shown, the lifting device system 3 is the core device system for lifting and lowering the tower column foot. During the lifting process, it must bear the weight of the upper iron tower structure and have an anti-pullout function to prevent the column foot from tipping over due to factors such as wind. The lifting device system 3 disclosed in this embodiment includes a lower support column 31, a lower support plate 32, a lower ear plate 33, a cylinder barrel 34, a cylinder rod 35 and an upper ear plate 36 from bottom to top.

[0065] The lower support column 31 is the main force-bearing structure when the lifting device system 3 is in operation. It is cast in place with the fixed column 21 as a whole during the foundation reconstruction. It has an internal reinforcement structure and the top is lower than the top of the fixed column 21 to facilitate the installation and lifting operation of the cylinder barrel 34 and the cylinder rod 35 of the telescopic cylinder. At the same time, a lower support plate 32 is pre-cast on the top of the lower support column 31. Its structure is rectangular on the outside and circular on the inside. It is a steel plate of a certain thickness. One part is pre-buried in the lower support column 31, and the other part is exposed on the surface. The main purpose is to facilitate the welding and leveling of the lower ear plate 33.

[0066] The lower ear plate 33 is welded on the upper surface of the lower support plate 32 and is evenly arranged along the circumferential direction. At the same time, attention is paid to whether it will interfere with the installation of the adjustment pad 25. One solution in this embodiment is to arrange four of them in a circumferential direction. The lower end of the cylinder barrel 34 is installed on the lower ear plate 33 through a pin shaft 37. The hinged structure can rotate a certain angle in one direction. At the same time, the clearance is matched to allow a certain amount of displacement to the left and right, thereby facilitating installation and lifting operations.

[0067] The upper end of the cylinder rod 35 is hinged to the upper ear plate 36, and the installation and working mode are similar to the lower ear plate 33. The upper ear plate 36 is uniformly welded to the lower surface of the fixed column foot flange 24 along the circumferential direction. In addition, the telescopic cylinder control mechanism is used to control the telescopic cylinder. The telescopic cylinder control mechanism includes a hydraulic valve, a hydraulic pump and an engine. The telescopic cylinder control mechanism is a movable device that can be reused and is not described in detail in this embodiment. The entire hydraulic system is required to be able to realize both the individual control of the telescopic cylinder lifting and lowering and the joint control of multiple groups of telescopic cylinders, and have a self-locking function to prevent the cylinder from suddenly shortening or extending under the gravity of the tower column foot.

[0068] During the lifting operation, the hydraulic cylinder 34 and the hydraulic cylinder rod 35 remain in a vertical state, the hydraulic cylinder 34 remains stationary relative to the lower support column 32, and the hydraulic cylinder rod 35 is lifted and lowered relative to the hydraulic cylinder 34, thereby driving the fixed column foot flange 24 and the main rod 19, the auxiliary rod 110, the auxiliary rod 2 111 and the entire tower foot structure to perform lifting and lowering movements. When the tower foot needs to be lifted, the hydraulic cylinder 34 is filled with oil, and the hydraulic cylinder rod 35 moves upward relatively; when the tower foot needs to be lowered, the hydraulic cylinder rod 35 moves downward relatively. Before the first lifting operation of the tower column foot, the existing column foot flange 114 and the existing anchor bolt 113 should be disengaged, so that the existing fixing device fails, and the lifting device system 3 and the fixing device system 2 are relied on to maintain stability.

[0069] The structure of the safety protection system 4 is as follows Figure 1As shown, the safety protection system 4 is an auxiliary safety protection device system during the lifting operation of the tower column foot, which is mainly used to fix the main pole with anchor cables, and is suitable for large towers and areas with strong winds. The safety protection system 4 mainly includes a ground anchor 43, a cable-stayed anchor cable 42 and a cable-stayed plate 41 from bottom to top.

[0070] The ground anchor 43 is a concrete anchoring structure buried deep underground, which provides anchoring force for the entire safety protection system 4 and requires a relatively stable anchoring structure. The inclined plate 41 is a fixing device attached to the main rod 19 and is fixed relative to the main rod 19.

[0071] The inclined plate 41 is a circular ring structure as a whole, which is composed of two semicircular rings welded or connected by anchor bolts, welded to the main rod 19, and can be welded with ribs to ensure the connection strength with the main rod 19. The inclined plate 41 is provided with a mounting hole to connect with the upper end of the inclined anchor cable 42.

[0072] The inclined anchor cable 42 is a flexible steel strand with a certain strength. The upper end is connected and fixed to the inclined plate 41, and the lower end is connected to the ground anchor 43, so as to transfer the buoyancy of the upper tower under the action of wind load to the ground anchor 43, thereby playing an anti-pullout role.

[0073] Several inclined anchor cables 42 can be arranged along the circumferential direction of the foundation part 1. According to the actual pull-out resistance calculation and with a certain safety factor, three are arranged in the present invention, one is on the inner side of the diagonal of the independent foundation, and the other two are evenly distributed along the circumferential direction. The lower end of the inclined anchor cable 42 is connected and fixed to the ground anchor 43 by adjusting the clamp 44. The length of the inclined anchor cable 42 can be adjusted by adjusting the clamp 44, so that in the process of lifting and lowering the tower column foot, it can be adjusted in time to ensure the tightening and tension stability of the inclined anchor cable 42.

[0074] Specifically, a replacement lifting method based on an uneven settlement adjustment device for a tower column foot comprises the following steps:

[0075] S1. Install safety protection system 4

[0076] The safety protection system 4 includes a ground anchor 43, a diagonal anchor cable 42 and a diagonal plate 41. The ground anchor 43 is buried underground to form a concrete anchoring structure buried deep underground to provide anchoring force for the entire safety protection system 4. The diagonal plate 41 is fixed on the main rod 19, and the diagonal anchor cable 42 is connected between the diagonal plate 41 and the ground anchor 43.

[0077] S2. Renovation of the foundation

[0078] The existing foundation is expanded and reconstructed in order from bottom to top, forming an expanded step 115, an expanded step 2 116, an expanded step 3 117 and a lower supporting column 31;

[0079] A plurality of additional transverse connecting beams 18 are fixedly connected between a pair of transverse connecting beams 15, and a plurality of additional longitudinal connecting beams 17 are fixedly connected between a pair of longitudinal connecting beams 16;

[0080] S3. Install the adjustment device

[0081] Cast the fixed column 21 in the lower supporting column 31 so that the fixed column 21 and the lower supporting column 31 form an integral structure, wherein the portion of the fixed column 21 located in the lower supporting column 31 is a rectangular cross section, and the top of the fixed column 21 is a circular cross section;

[0082] Install the lower support plate 32 on the upper end of the lower support column 31, install the lower ear plate 33 on the upper end of the lower support plate 32, and then install the telescopic cylinder, the fixed column base flange 24, and the fixing nut 26 in sequence, install the multi-layer adjustment pad 25 on the fixed column 21, and fix it with the fastening bolts 27;

[0083] S4. Debugging and inspection

[0084] The multiple telescopic cylinders are regulated by a movable telescopic cylinder control mechanism to achieve balanced support. The telescopic cylinder control mechanism is removed, the stability and reliability of all structures are checked, and the safety protection system 4 is dismantled or not, to complete the underpinning and lifting construction.

[0085] It can be seen from the above technical solutions that the present invention has the following beneficial effects:

[0086] When uneven settlement occurs on the tower column base, the present invention can quickly lift and lower the tower column base so that multiple tower column bases are always on the same horizontal plane, thereby maintaining structural stability; it has pressure-bearing and pull-out resistance functions, and can provide both a large lifting force and a large pull-out resistance during the lifting and lowering of the column base. After the column base is adjusted to a predetermined height, it is convenient to fix it and maintain long-term efficient operation; it can effectively adjust the uneven settlement of the foundations of large towers in areas with strong winds, and can be adjusted repeatedly according to the settlement conditions.

[0087] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0088] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A replacement and lifting method based on an uneven settlement adjustment device for a tower column foot, characterized in that: The following steps are involved: S1. Install safety protection system The safety protection system includes a ground anchor, a diagonal anchor cable and a diagonal plate. The ground anchor is buried underground to form a concrete anchoring structure buried deep underground to provide anchoring force for the entire safety protection system. The diagonal plate is fixed on the main rod, and the diagonal anchor cable is connected between the diagonal plate and the ground anchor. S2. Renovation of the foundation The existing foundation is expanded and reconstructed in order from bottom to top, forming expansion step 1, expansion step 2, expansion step 3 and lower supporting columns respectively; A plurality of additional transverse connecting beams are fixedly connected between a pair of transverse connecting beams, and a plurality of additional longitudinal connecting beams are fixedly connected between a pair of longitudinal connecting beams; S3. Install the adjustment device Casting the fixed column in the lower supporting column so that the fixed column and the lower supporting column form an integral structure, wherein the portion of the fixed column located in the lower supporting column is a rectangular cross section, and the top of the fixed column is a circular cross section; Install the lower support plate on the upper end of the lower support column, install the lower ear plate on the upper end of the lower support plate, then install the telescopic cylinder, the fixed column foot flange, the fixing nut in sequence, install the multi-layer adjustment pads on the fixed column, and fix them with fastening bolts; S4. Debugging and inspection Through the movable telescopic cylinder control mechanism, multiple telescopic cylinders are regulated to achieve balanced support. The telescopic cylinder control mechanism is removed, the stability and reliability of all structures are checked, and the safety protection system is dismantled or not dismantled to complete the underpinning and lifting construction; Wherein, the adjustment device in step S3 comprises: a fixed column, wherein a plurality of evenly distributed fixing anchor bolts are fixedly connected inside the fixed column, and the upper ends of the fixing anchor bolts are threadedly connected with fixing nuts; A fixed column base flange is arranged on the upper side of the fixed column, a bolt hole matching the fixed anchor bolt is opened on the fixed column base flange, the fixed anchor bolt passes through the bolt hole, the upper end of the fixed column base flange is fixedly connected with a main rod, a secondary rod 1 and a secondary rod 2, and a rib plate is fixedly connected between the main rod and the fixed column base flange; A plurality of adjustment pads are arranged between the fixed column foot flange and the fixed column; A plurality of telescopic oil cylinders are arranged between the fixed column base flange and the lower supporting column of the tower column base, and the plurality of telescopic oil cylinders are used to realize the lifting and lowering of the fixed column base flange.

2. The underpinning and lifting method based on the uneven settlement adjustment device of the iron tower column foot according to claim 1 is characterized in that: In S1, an adjustment fixture is installed on the ground anchor, and the lower end of the inclined anchor cable is connected to the adjustment fixture.

3. The underpinning and lifting method based on the uneven settlement adjustment device of the tower column foot according to claim 1 is characterized in that: In S1, the inclined plate is welded and fixed on the main rod.

4. The underpinning and lifting method based on the uneven settlement adjustment device of the tower column foot according to claim 1 is characterized in that: In S4, the telescopic cylinder control mechanism includes a hydraulic valve, a hydraulic pump and an engine.

5. The underpinning and lifting method based on the uneven settlement adjustment device of the tower column foot according to claim 1 is characterized in that: A plurality of inter-column stirrups are fixedly connected between the plurality of fixing anchor bolts.

6. The underpinning and lifting method based on the uneven settlement adjustment device of the tower column foot according to claim 1 is characterized in that: The adjusting pad is provided with a groove matching the fixing anchor bolt, and two adjacent adjusting pads are connected with a fastening bolt.

7. The underpinning and lifting method based on the tower column foot uneven settlement adjustment device according to claim 1 is characterized in that: The telescopic cylinder includes a cylinder barrel and a cylinder rod. An upper ear plate is fixedly connected to the fixed column base flange, and a lower ear plate is fixedly connected to the lower supporting column. The telescopic cylinder is installed between the upper ear plate and the lower ear plate. Pins are connected between the lower ear plate and the cylinder barrel and between the cylinder rod and the upper ear plate.

8. The underpinning and lifting method based on the tower column foot uneven settlement adjustment device according to claim 7 is characterized in that: The upper end of the lower supporting column is fixedly connected with a lower supporting plate, and the lower ear plate is fixedly connected to the lower supporting plate.

9. The underpinning and lifting method based on the tower column foot uneven settlement adjustment device according to claim 7 is characterized in that: The telescopic oil cylinder has a self-locking function.

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