Clamping type inclined strut static pressure construction device and working method thereof

Abstract

The invention discloses a clamping type inclined strut static pressure construction device and a working method thereof.The construction device is composed of a clamping device, an angle adjusting device and a pile pressing device, and the clamping device is connected with the pile pressing device through the angle adjusting device; the clamping device comprises two groups of steel clamps, and the two groups of steel clamps are respectively fixed on the profile steel of the two adjacent support piles; the angle adjusting device comprises a rotatable bottom plate, two fixing rods and two telescopic rods, the two fixing rods are the upper fixing rod and the lower fixing rod respectively, the fixing parts of the telescopic rods are rotationally connected to the lower fixing rod, the telescopic parts of the telescopic rods are rotationally connected to the bottom of the rotatable bottom plate, and the top of the rotatable bottom plate is rotationally connected to the upper fixing rod. The method has the advantages that the support pile is directly used as a counter-force device, so that weak stress links are reduced, counter-force transmission paths are reduced, and the safety of a foundation pit is greatly improved; the pile pressing angle is freely adjusted, and the requirement for pile avoiding of engineering is greatly met.

Description

Technical Field

[0001] The invention relates to the technical field of diagonal bracing construction, in particular to a clamping type diagonal bracing static pressure construction device and a working method thereof. Background Art

[0002] Foundation pit support is a critical step in ensuring the safety of underground structure construction in civil engineering. Diagonal bracing and pressure pile technology, a traditional form of support, is widely used in deep foundation pit projects. The core principle of this system is to install an oblique support structure between the pit sidewalls and the support piles. This structure transfers lateral earth pressure to the pit bottom or the opposite stable stratum, thereby balancing lateral soil deformation and maintaining pit stability.

[0003] Traditional diagonal bracing and pile-pressing systems typically consist of the following structures: supporting piles (such as cast-in-place piles, steel sheet piles, etc.), diagonal bracing rods (steel pipes, steel sections, or concrete components), connection nodes, and anchoring devices. Diagonal bracing is generally installed before excavation. If two diagonal braces are installed in the foundation pit, the construction sequence is as follows: construction of the supporting piles, installation of the first diagonal brace, excavation (generally to the location of the second diagonal brace), installation of the second diagonal brace, and continued excavation to the bottom of the foundation pit. The diagonal bracing rods and supporting piles are connected by welding or bolting nodes to form a spatial force system, which resists the lateral load of the soil through the axial compression characteristics of the diagonal brace. Traditional diagonal bracing and pile-pressing construction mainly includes two forms: mechanical pile-pressing and pile-pressing with a reserved cavity in the ring beam.

[0004] The disadvantages of the manipulator pile pressing method are: (1) The manipulator (pile driving device) is large, requiring more manpower and auxiliary machinery, and occupies a large space; (2) The cost of mechanical construction is high, which is not conducive to controlling the project cost; (3) The bearing capacity of the diagonal brace cannot be measured in real time.

[0005] The disadvantages of pile pressing with reserved holes in ring beams are: (1) Before the diagonal bracing piles are pressed, it is necessary to leave pile holes in advance on the ring beam. The pile driving equipment can only be installed after the strength of the ring beam reaches the design requirements. This is not conducive to controlling the construction schedule when the construction period is very tight; (2) The support piles cannot be used directly, and the force transmission path is long. The ring beam of the reserved pile hole must be used as a reaction device. The edge of the pile hole is a weak link in the force, and the design and construction parties need to strengthen control; (3) The angle of the diagonal support pile is fixed and cannot be adjusted, making it difficult to avoid when there are engineering piles nearby. Summary of the Invention

[0006] The present invention addresses the shortcomings of the prior art and provides a clamping-type diagonal brace static pressure construction device and its operating method. The construction device comprises a clamping device, an angle adjustment device, and a pile-pressing device. The clamping device is fixed to the support pile, and the pile-pressing device is used to clamp and press down the diagonal brace. The clamping device is connected to the pile-pressing device via an angle adjustment device, which can adjust the inclination angle of the diagonal brace. The operating method achieves pile-pressing of all diagonal braces by disassembling and assembling the construction device.

[0007] The purpose of the present invention is achieved by the following technical solutions: The top end face of said sliding arm is fixedly provided with a toothed connecting strip which is cooperatively connected with the toothed connecting strip of said toothed connecting gear.

[0008] The pile driving device includes a connecting rod, a force transmission hoop, a jack, an inner push rod and a connecting plate. The upper end and the lower end of the inner push rod are respectively connected to the jack and the force transmission hoop. The force transmission hoop is used to clamp the diagonal brace. The connecting rod is provided with two groups. The two groups of connecting rods are respectively arranged on both sides of the rotatable base plate. Each group of connecting rods includes two connecting rods. The top ends of the two connecting rods in each group of connecting rods are connected by the connecting plate. The four connecting rods are arranged in a rectangular shape on the rotatable base plate. There are two jacks and the two jacks are respectively mounted on the two connecting plates. The lower end of the inner push rod passes through the connecting plate to be connected to the force transmission hoop, and the force transmission hoop is respectively sleeved on the four connecting rods.

[0009] The rotatable bottom plate is provided with a bottom plate cavity for allowing the diagonal brace to pass through.

[0010] The fixing rod consists of a middle section and two side sections. The middle section of the fixing rod is cylindrical. One end of the side section of the fixing rod is cylindrical and the other end is flat. The middle section and the side sections of the fixing rod are connected by an adjusting sleeve. The adjusting sleeve has an internal thread. Both ends of the middle section of the fixing rod and one end of the side section of the fixing rod are provided with external threads that match the internal thread of the adjusting sleeve. The other end of the side section of the fixing rod is provided with a mounting hole.

[0011] The steel section is an H-shaped steel or an I-shaped steel, and the steel clamp is installed on one side of the steel section and fixed to the steel section by fastening bolts. The steel clamp is provided with a positioning bolt, and the positioning bolt is installed in the mounting hole of the side section of the fixing rod and is connected and cooperated with the locking nut to fix the fixing rod on the steel clamp.

[0012] A working method of a clamping type diagonal bracing static pressure construction device, the working method comprising the following steps: S1: constructing support piles and setting steel sections in the support piles; S2: According to the pile pressing position of the first diagonal brace, fix the steel clamp of the clamping device to the corresponding steel section of the support pile; S3: Connecting the fixed rod of the angle adjustment device to the steel clamp, and adjusting the inclination angle of the rotatable base plate of the angle adjustment device through the telescopic rod of the angle adjustment device; S4: Installing a pile pressing device on the rotatable bottom plate of the angle adjustment device; S5: hoisting the diagonal brace to a corresponding pile-pressing position, clamping the diagonal brace with a force-transmitting clamp of the pile-pressing device, and pressing the diagonal brace with a jack of the pile-pressing device; S6: Recording the pile-pressing force reading of the jack in real time, and determining the bearing capacity of the diagonal brace according to the pile-pressing force of the jack; S7: After the first diagonal brace completes pile driving, the angle adjustment device and the pile driving device are separated from the steel clamp of the clamping device as a whole, and the steel clamp of the clamping device on the steel section of the support pile is removed; the steel clamp of the clamping device is installed on the steel section of the support pile corresponding to the pile driving position of the next diagonal brace, and the angle adjustment device and the pile driving device are installed as a whole, and steps S5 to S6 are repeated until all the diagonal braces complete pile driving; S8: construct a ring beam on the top of the support pile, and connect the top of the diagonal brace to the ring beam.

[0013] The advantages of the present invention are: (1) The diagonal bracing can be designed and constructed simultaneously with the enclosure structure, which greatly reduces the construction period; (2) The supporting piles (H-shaped steel, I-shaped steel, etc.) are directly used as reaction devices, which reduces the weak links (ring beams with reserved holes for pile pressure), reduces the reaction force transmission path, and greatly improves the safety of the foundation pit; (3) After the pile driving is completed, the top of the diagonal support is directly connected to the ring beam, and the concrete is poured as a whole, which greatly improves the integrity and safety of the foundation pit retaining structure; (4) The pile driving equipment is compact and easy to install, disassemble and move, which greatly improves the construction efficiency; (5) The pile driving angle can be adjusted freely, which largely meets the requirements of pile avoidance in engineering projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the installation of the construction device of the present invention (1); Figure 2 This is a schematic diagram of the installation of the construction device of the present invention (II); Figure 3 This is a schematic diagram of the installation of the clamping device of the present invention; Figure 4 is a schematic diagram of the clamping device of the present invention; Figure 5 is a schematic diagram of the angle adjustment device of the present invention; Figure 6 is a schematic diagram of a pile driving device according to the present invention; like Figures 1 to 6 As shown, the marks in the figure represent: Support pile 1; steel section 11; clamping device 2; steel clamp 21; positioning bolt 22; fastening bolt 23; angle adjustment device 3; rotatable base plate 31; fixing rod 32; adjusting sleeve 321; telescopic rod 33; connecting thread 34; base plate cavity 35; locking nut 36; pile driving device 4; connecting rod 41; force transmission clamp 42; jack 43; inner push rod 44; connecting plate 45; diagonal brace 5. DETAILED DESCRIPTION

[0015] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art: Example: Figures 1 to 6 As shown, this embodiment relates to a clamping type diagonal brace static pressure construction device, which mainly includes a clamping device 2, an angle adjustment device 3 and a pile pressing device 4. The clamping device 2 is fixed on the supporting pile 1, and the pile pressing device 4 is used to clamp and press down the diagonal brace 5. The clamping device 2 is connected to the pile pressing device 4 through the angle adjustment device 3, and the angle adjustment device 3 can adjust the inclination angle of the diagonal brace 5.

[0016] like Figures 1 to 4As shown, the clamping device 2 includes two sets of steel clamps 21, and the two sets of steel clamps 21 are respectively fixed on the steel sections 11 of two adjacent supporting piles 1. Each set of steel clamps 21 includes two steel clamps 21 arranged upper and lower. The upper steel clamps 21 of the two sets of steel clamps 21 are at the same elevation, and the lower steel clamps 21 of the two sets of steel clamps 21 are also at the same elevation. The bottom end of the steel section 11 is arranged in the supporting pile 1 and the top end extends to the outside of the supporting pile 1. The steel clamps 21 are installed on one side of the steel section 11 and are fixed to the steel section 11 by fastening bolts 23. In this embodiment, In the embodiment, the steel section 11 generally adopts H-shaped steel or I-shaped steel (H-shaped steel is adopted in this embodiment), and the shape of the steel clamp 21 is adapted to the shape of one side of the steel section 11. The steel clamp 21 is installed along the longitudinal direction of the flange plate of the steel section 11. The fastening bolts 23 are arranged in two rows above and below, and each row of fastening bolts 23 includes four fastening bolts 23, two of which are respectively arranged on both sides of the inner side of the flange plate of the steel section 11, and the other two fastening bolts 23 are respectively arranged on both sides of the web plate of the steel section 11, to ensure that each contact surface of the steel clamp 21 and the steel section 11 is firmly connected.

[0017] like Figures 1 and 2 as well as Figure 5The top of the rotatable base plate 31 is rotatably connected to the top of the rotatable base plate 31, and the bottom of the rotatable base plate 31 is rotatably connected to the rotatable base plate 31. The rotatable bottom plate 31 is provided with a bottom plate cavity 35 that allows the diagonal brace 5 to pass through. The bottom plate cavity 35 is rectangular in shape, and the long side direction of the bottom plate cavity 35 is consistent with the direction of the pile driving angle adjustment of the diagonal brace 5, which can provide operating space for the pile driving angle adjustment. The rotatable bottom plate 31 is provided with a connecting thread 34, which can be connected to the connecting rod 41 of the pile driving device 4 and can also serve as the installation base of the pile driving device 4. The fixed rod 32 is composed of a middle section and two side sections. The middle section of the fixed rod 32 is cylindrical. One end of the side section of the fixed rod 32 is cylindrical and the other end is flat. The middle section and the side section of the fixed rod 32 are connected by an adjusting sleeve 321. The adjusting sleeve 321 has an internal thread. Both ends of the middle section of the fixed rod 32 and one end (cylindrical) of the side section of the fixed rod 32 are provided with external threads that match the internal threads of the adjusting sleeve 321. In this embodiment, the side sections of the fixed rod 32 The external threads at one end (cylindrical) of the segment have opposite thread directions to the external threads at the corresponding end (closer to the side segment) of the middle section of the fixing rod 32. When the adjustment sleeve 321 is rotated, the side segment and the middle section move synchronously inward or outward of the adjustment sleeve 321, allowing the overall length of the fixing rod 32 to be extended or retracted. Thread friction maintains the position of the fixing rod 32, eliminating the need for additional tightening. Furthermore, during use, the initial length and adjustment margin should be selected based on the range of extension and retraction, and grease should be applied regularly to reduce wear. The other end (flattened) of the side segment of the fixing rod 32 has a mounting hole. A locating bolt 22 is provided on the steel clamp 21. The locating bolt 22 is installed in the mounting hole of the side segment of the fixing rod 32 and engages with a locking nut 36 to secure the fixing rod 32 to the steel clamp 21. In this embodiment, each steel clamp 21 is equipped with two locating bolts 22, one located on either side of the outer side of the flange plate of the steel section 11.

[0018] like Figures 1 and 2 as well as Figure 6As shown, the pile driving device 4 includes a connecting rod 41, a force transmission hoop 42, a jack 43, an inner push rod 44 and a connecting plate 45. The upper end and the lower end of the inner push rod 44 are respectively connected to the jack 43 and the force transmission hoop 42. The force transmission hoop 42 is used to clamp the diagonal brace 5. There are two groups of connecting rods 41. The two groups of connecting rods 41 are respectively arranged on both sides of the rotatable base plate 31. Each group of connecting rods 41 includes two connecting rods 41. The top ends of the two connecting rods 41 of each group of connecting rods 41 are connected by a connecting plate 45. The four connecting rods 41 are arranged in a rectangular shape on the rotatable base plate 31. There are two jacks 43 and the two jacks 43 are respectively mounted on two connecting plates 45. The lower end of the inner push rod 44 passes through the connecting plate 45 to be connected with the force transmission hoop 42, and the force transmission hoop 42 is respectively sleeved on the four connecting rods 41. The jack 43 drives the force transmission hoop 42 to move vertically via the inner push rod 44 , and the connecting rod 41 can guide the force transmission hoop 42 .

[0019] like Figures 1 to 6 As shown, this embodiment also has a working method of a clamping type diagonal bracing static pressure construction device, which mainly includes the following steps: S1: Construct support piles 1 and set steel sections 11 inside the support piles 1.

[0020] Among them, before construction, a detailed survey of the geological conditions is required to ensure the applicability of static diagonal bracing piles. Static diagonal bracing piles are suitable for geological conditions such as soft soil, clay, and sand, but the pile pressing effect is not good in hard strata or rocks.

[0021] According to the foundation pit edge and the positioning of the support pile 1, the support pile 1 is constructed, the steel section 11 is inserted, and the support pile 1 is cured to the design strength.

[0022] S2: According to the pile-pressing position of the first diagonal brace 5 , the steel clamp 21 of the clamping device 2 is fixed to the corresponding steel section 11 of the supporting pile 1 .

[0023] S3: Connect the fixed rod 32 of the angle adjustment device 3 to the steel clamp 21, and adjust the tilt angle of the rotatable base plate 31 of the angle adjustment device 3 through the telescopic rod 33 of the angle adjustment device 3.

[0024] S4: Install the pile pressing device 4 on the rotatable base plate 31 of the angle adjustment device 3 .

[0025] S5: hoist the diagonal brace 5 to the corresponding pile driving position, clamp the diagonal brace 5 by the force transmission clamp 42 of the pile driving device 4, and drive the diagonal brace 5 by the jack 43 of the pile driving device 4.

[0026] When the diagonal brace 5 is hoisted to the corresponding ground pile position, it is necessary to ensure that the pile body of the diagonal brace 5 is perpendicular to the rotatable bottom plate 31. When the length of a single section of the diagonal brace 5 is insufficient, a welding connection method is used to connect the piles.

[0027] S6: Record the pile-pressing force reading of the jack 43 in real time, and determine the bearing capacity of the diagonal brace 5 based on the pile-pressing force of the jack 43 .

[0028] Among them, for those that do not meet the design requirements, modification plans can be proposed in advance for reinforcement to solve the unstable bearing capacity problem of traditional diagonal bracing technology.

[0029] S7: After the first diagonal brace 5 is pile-pressed, the angle adjustment device 3 and the pile-pressing device 4 are separated as a whole from the steel clamp 21 of the clamping device 2 (the rotatable base plate 31 of the angle adjustment device 3 and the connecting rod 41 of the pile-pressing device 4 are not disassembled), and the steel clamp 21 of the clamping device 2 on the steel section 11 of the supporting pile 1 is removed; the steel clamp 21 of the clamping device 2 is installed on the steel section 11 of the supporting pile 1 corresponding to the pile-pressing position of the next diagonal brace 5, and the angle adjustment device 3 and the pile-pressing device 1 are installed as a whole, and steps S5 to S6 are repeated until all diagonal braces 5 are pile-pressed.

[0030] Among them, the angle adjustment device 3 and the pile driving device 4 are both compact and only require 3 workers and a crane to transfer and construct. They hardly occupy the external space of the supporting structure and can be constructed close to buildings, land red lines, walls, etc.

[0031] S8: Construct a ring beam on top of the support pile 1 and connect the top of the diagonal brace 5 to the ring beam.

[0032] The beneficial technical effects of this embodiment are: (1) The diagonal bracing can be designed and constructed simultaneously with the enclosure structure, which greatly reduces the construction period; (2) The supporting piles (H-shaped steel, I-shaped steel, etc.) are directly used as reaction devices, which reduces the weak links (ring beams with reserved holes for pile pressure), reduces the reaction force transmission path, and greatly improves the safety of the foundation pit; (3) After the pile driving is completed, the top of the diagonal support is directly connected to the ring beam, and the concrete is poured as a whole, which greatly improves the integrity and safety of the foundation pit retaining structure; (4) The pile driving equipment is compact and easy to install, disassemble and move, which greatly improves the construction efficiency; (5) The pile driving angle can be adjusted freely, which largely meets the requirements of pile avoidance in engineering projects.

[0033] Although the above embodiments have described in detail the concepts and embodiments of the present invention with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, so they are not described in detail here.

Claims

1. A clamping type diagonal bracing static pressure construction device, characterized in that The construction device consists of a clamping device, an angle adjustment device and a pile driving device, and the clamping device is connected to the pile driving device through the angle adjustment device; the clamping device includes two groups of steel clamps, and the two groups of steel clamps are respectively fixed on the steel sections of two adjacent supporting piles, and each group of steel clamps includes two steel clamps arranged upper and lower; the angle adjustment device includes a rotatable base plate, two fixing rods and two telescopic rods, the two fixing rods are respectively an upper fixing rod and a lower fixing rod, the two ends of the upper fixing rod are respectively fixed on the steel clamps at the upper parts of the two groups of steel clamps, and the two ends of the lower fixing rod are respectively fixed on the steel clamps at the lower parts of the two groups of steel clamps, the fixed part of the telescopic rod is rotatably connected to the lower fixed rod, the telescopic part is rotatably connected to the bottom of the rotatable base plate, and the top of the rotatable base plate is rotatably connected to the upper fixing rod.

2. A clamping type diagonal bracing static pressure construction device as claimed in claim 1, characterized in that The pile driving device includes a connecting rod, a force transmission hoop, a jack, an inner push rod and a connecting plate. The upper end and the lower end of the inner push rod are respectively connected to the jack and the force transmission hoop. The force transmission hoop is used to clamp the diagonal brace. The connecting rod is provided with two groups. The two groups of connecting rods are respectively arranged on both sides of the rotatable base plate. Each group of connecting rods includes two connecting rods. The top ends of the two connecting rods in each group of connecting rods are connected by the connecting plate. The four connecting rods are arranged in a rectangular shape on the rotatable base plate. There are two jacks and the two jacks are respectively mounted on the two connecting plates. The lower end of the inner push rod passes through the connecting plate to be connected to the force transmission hoop, and the force transmission hoop is respectively sleeved on the four connecting rods.

3. A clamping type diagonal bracing static pressure construction device as claimed in claim 2, characterized in that The rotatable bottom plate is provided with a bottom plate cavity for allowing the diagonal brace to pass through.

4. A clamping type diagonal bracing static pressure construction device as claimed in claim 1, characterized in that The fixing rod consists of a middle section and two side sections. The middle section of the fixing rod is cylindrical. One end of the side section of the fixing rod is cylindrical and the other end is flat. The middle section and the side sections of the fixing rod are connected by an adjusting sleeve. The adjusting sleeve has an internal thread. Both ends of the middle section of the fixing rod and one end of the side section of the fixing rod are provided with external threads that match the internal thread of the adjusting sleeve. The other end of the side section of the fixing rod is provided with a mounting hole.

5. A clamping type diagonal bracing static pressure construction device as claimed in claim 4, characterized in that The steel section is an H-shaped steel or an I-shaped steel, and the steel clamp is installed on one side of the steel section and fixed to the steel section by fastening bolts. The steel clamp is provided with a positioning bolt, and the positioning bolt is installed in the mounting hole of the side section of the fixing rod and is connected and cooperated with the locking nut to fix the fixing rod on the steel clamp.

6. A method for operating a clamping-type diagonal bracing static pressure construction device according to any one of claims 1 to 5, characterized in that The working method comprises the following steps: S1: constructing support piles and setting steel sections in the support piles; S2: According to the pile pressing position of the first diagonal brace, fix the steel clamp of the clamping device to the corresponding steel section of the support pile; S3: Connecting the fixed rod of the angle adjustment device to the steel clamp, and adjusting the inclination angle of the rotatable base plate of the angle adjustment device through the telescopic rod of the angle adjustment device; S4: Installing a pile pressing device on the rotatable bottom plate of the angle adjustment device; S5: hoisting the diagonal brace to a corresponding pile-pressing position, clamping the diagonal brace with a force-transmitting clamp of the pile-pressing device, and pressing the diagonal brace with a jack of the pile-pressing device; S6: Recording the pile-pressing force reading of the jack in real time, and determining the bearing capacity of the diagonal brace according to the pile-pressing force of the jack; S7: After the first diagonal brace completes pile driving, the angle adjustment device and the pile driving device are separated from the steel clamp of the clamping device as a whole, and the steel clamp of the clamping device on the steel section of the support pile is removed; the steel clamp of the clamping device is installed on the steel section of the support pile corresponding to the pile driving position of the next diagonal brace, and the angle adjustment device and the pile driving device are installed as a whole, and steps S5 to S6 are repeated until all the diagonal braces complete pile driving; S8: construct a ring beam on the top of the support pile, and connect the top of the diagonal brace to the ring beam.

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