An integrated support model of foundation pit retaining pile, anchor and strut

Abstract

The present invention discloses a foundation pit support pile-anchor strut integrated support model, which includes a pressure strut bottom plate, a pressure strut platform, a unidirectional hydraulic jack, a hydraulic jack support, a force transfer rod, a pressure gauge, a vertical force transfer rod, a model box, an inclined strut platform, a pile casing, a fastening bolt, an anchor rod casing support, an anchor rod casing, a universal opening joint, a transverse hanger, a pile casing limit plate, a load plate vertical connecting rod, a main support, a bolt screw, a support platform and a reinforcement flat plate. The beneficial effects of the present invention are as follows: By pre-burying the anchor rod casing and the pile casing, using on-site cast-in-place concrete to form piles, then excavating the soil layer by layer, pouring the anchor rod at the designated position, and setting inclined struts at the same time, it realizes a better simulation of the construction process and the pile-anchor strut support system. Using the unidirectional hydraulic jack and the load plate can apply lateral force to the pile-anchor strut more accurately. A pressure gauge is provided at the lower part of the vertical force transfer rod, which is convenient for measuring the pressure.

Description

Technical Field

[0001] The present invention relates to an indoor model test device, specifically to a foundation pit supporting pile-anchor-brace integrated supporting model, belonging to the indoor model test device. Background Technique

[0002] As a commonly used supporting means, the pile-anchor-brace combined supporting system is widely used in foundation pit support. Among them, using indoor model tests to study the pile-anchor-brace system has the characteristics of high efficiency, accuracy, and convenience. In previous test processes, methods such as post-burying precast piles and pre-burying anchor rods were usually adopted. At the same time, the requirement of "supporting while excavating" on-site could not be achieved, which was quite different from the process of first casting supporting piles on-site, constructing to a certain depth, setting anchor rods and inclined braces, and thus would have a greater impact on the test results. Using soil surcharge to change the force of the pile-anchor-brace supporting system, this loading method is cumbersome and cannot accurately control the loading magnitude, and it is difficult to ensure uniform soil layer stress. Summary of the Invention

[0003] The purpose of the present invention is to provide a foundation pit supporting pile-anchor-brace integrated supporting model to solve the above problems.

[0004] The present invention realizes the above purpose through the following technical solutions: A foundation pit supporting pile-anchor-brace integrated supporting model, including a pressure brace bottom plate, a pressure brace platform, a unidirectional oil pressure jack, an oil pressure jack support, a force transfer rod, a pressure gauge, a vertical force transfer rod, a model box, an inclined brace platform, a pile casing, a fastening bolt, an anchor rod casing support, an anchor rod casing, a universal opening joint, a horizontal hanging bracket, a pile casing limit plate, a load plate vertical connecting rod, a load plate, a main support, a bolt screw, a support platform, and a reinforcement flat plate; the pressure brace bottom plate is rigidly connected to the pressure brace platform, and the two ends of the pressure brace platform are respectively provided with an oil pressure jack support and a pressure gauge. One end of the oil pressure jack support is connected to one end of the unidirectional oil pressure jack through a bolt, and the other end of the unidirectional oil pressure jack is connected to the vertical force transfer rod through a force transfer rod. One end of the vertical force transfer rod is connected to the pressure gauge, and the other end is rigidly connected to the main support. One end of the load plate vertical connecting rod is rigidly connected to the load plate, and one end is hinged to the main support through a bolt. The main support is hinged to the support platform through a bolt screw. Reinforcement flat plates are provided on both sides of the support platform. The pile casing is sleeved in the horizontal hanging bracket, and a pile casing limit plate is provided at the upper part of the pile casing. A fastening bolt is provided on the side of the horizontal hanging bracket. The anchor rod casing support is rigidly connected to the horizontal hanging bracket, and a universal opening joint is provided in the anchor rod casing support. The anchor rod casing is sleeved in the universal opening joint.

[0005] Further, when the unidirectional oil pressure jack moves downward, it drives the vertical force transfer rod to move downward through the force transfer rod, and at the same time, the pressure of the pressure gauge directly below the vertical force transfer rod changes to give a pressure value.

[0006] Further, during the downward movement of the unidirectional hydraulic jack, the vertical connecting rod of the load plate drives the load plate to move downward.

[0007] Further, the pile casing can move up and down on the transverse hanging bracket, and the pile length is controlled by the pile casing limiting plate.

[0008] Further, the anchor rod casing can move up, down, left and right in the universal opening joint of the anchor rod casing bracket.

[0009] Further, when pouring materials into the pile casing and the anchor rod casing, the pile casing is pulled out upward along the transverse hanging bracket, and the anchor rod casing is pulled out along the universal opening joint.

[0010] Further, a diagonal bracing platform is provided on one inner wall of the model box.

[0011] The beneficial effects of the present invention are as follows: The integrated support model device has a simple structure, reasonable design and convenient operation. By pre-burying the pile casing and using on-site cast-in-place concrete to form piles, after curing to the age, the soil body is simulated to be excavated layer by layer according to the test steps. After excavating to the specified position, the anchor rod is poured using the anchor rod casing, and at the same time, diagonal bracings are set to achieve the goal of simulating the on-site construction process and truly reflecting the force change of the pile-anchor bracing system. When using the unidirectional hydraulic jack and the load plate during the excavation process, it is more convenient and accurate to apply lateral force to the soil layer. When the unidirectional hydraulic jack moves downward and the vertical force transfer rod moves downward, the pressure of the pressure gauge connected to the vertical force transfer rod changes, giving an accurate pressure value. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is the schematic diagram of the overall structure of the present invention;

[0013] Figure 2 is the exploded schematic diagram of the overall structure of the present invention;

[0014] Figure 3 is the sectional view of the present invention;

[0015] Figure 4 is the detailed schematic diagram of the transverse hanging bracket of the present invention;

[0016] In the figure: 1, pressure bracing bottom plate; 2, pressure bracing platform; 3, unidirectional hydraulic jack; 4, hydraulic jack bracket; 5, force transfer rod; 6, pressure gauge; 7, vertical force transfer rod; 8, model box; 9, diagonal bracing platform; 10, pile casing; 11, fastening bolt; 12, anchor rod casing bracket; 13, anchor rod casing; 14, universal joint; 15, transverse hanging bracket; 16, pile casing limiting plate; 17, vertical connecting rod of load plate; 18, load plate; 19, main bracket; 20, bolt screw; 21, bracket bearing platform; 22, reinforcement flat plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] As Figures 1-4 shown, a foundation pit support pile-anchor bracing integrated support model includes a pressure bracing bottom plate 1, a pressure bracing platform 2, a unidirectional oil pressure jack 3, an oil pressure jack support 4, a force transmission rod 5, a pressure gauge 6, a vertical force transmission rod 7, a model box 8, an inclined bracing platform 9, a pile casing 10, a fastening bolt 11, an anchor rod casing support 12, an anchor rod casing 13, a universal opening joint 14, a transverse hanger 15, a pile casing limiting plate 16, a load plate vertical connecting rod 17, a load plate 18, a main support 19, a pin bolt screw 20, a support platform 21, and a reinforcement flat plate 22; the pressure bracing bottom plate 1 is rigidly connected to the pressure bracing platform 2, and the two ends of the pressure bracing platform 2 are respectively provided with an oil pressure jack support 4 and a pressure gauge 6. One end of the oil pressure jack support 4 is connected to one end of the unidirectional oil pressure jack 3 by a bolt, and the other end of the unidirectional oil pressure jack 3 is connected to the vertical force transmission rod 7 through the force transmission rod 5. One end of the vertical force transmission rod 7 is connected to the pressure gauge 6, and the other end is rigidly connected to the main support 19. One end of the load plate vertical connecting rod 17 is rigidly connected to the load plate 18, and one end is hinged to the main support 19 by a bolt. The main support 19 is hinged to the support platform 21 through the pin bolt screw 20. The two sides of the support platform 21 are provided with reinforcement flat plates 22. The pile casing 10 is sleeved in the transverse hanger 15, and a pile casing limiting plate 16 is provided at the upper part of the pile casing 10. A fastening bolt 11 is provided on the side of the transverse hanger 15. The anchor rod casing support 12 is rigidly connected to the transverse hanger 15, and a universal opening joint 14 is provided in the anchor rod casing support 12. The anchor rod casing 13 is sleeved in the universal opening joint 14.

[0020] As a technical optimization solution of the present invention: when the one-way hydraulic jack 3 moves downward, it drives the vertical force transmission rod 7 to move downward through the force transmission rod 5. At the same time, the pressure of the pressure gauge 6 directly below the vertical force transmission rod 7 changes to give a pressure value; during the process of the one-way hydraulic jack 3 moving downward, the load plate vertical connecting rod 17 drives the load plate 18 to move downward; the pile casing 10 can move up and down on the transverse hanger 15, and the pile length is controlled by the pile casing limiting plate 16; the anchor rod casing 13 can move up, down, left and right in the universal opening joint 14 of the anchor rod casing bracket 12; when pouring materials into the pile casing 10 and the anchor rod casing 13, the pile casing 10 is pulled out upward along the transverse hanger 15, and the anchor rod casing 13 is pulled out along the universal opening joint 14; on one inner wall of the model box 8, there is an inclined support platform 9.

[0021] When the present invention is in use, first check whether the connections of all components are firm, whether each screw can rotate normally, and whether the pile casing and the anchor rod casing can move normally. After the inspection is completed. Place the model box in the designated position, span the transverse hanger across both sides of the model box. After fixing, place the pile casing inside the transverse support, adjust it to the designated position, tighten the fastening bolts, insert the anchor rod casing into the universal opening joint, adjust the length and angle. After the adjustment is completed, backfill the soil densely in the model box, and then pour the cementitious material into the pile casing. At the same time, pull out the pipe while pouring. After reaching the curing age, adjust the main support so that the load plate contacts the surface of the unexcavated soil layer. Then adjust the one-way hydraulic jack to make the main support move downward, apply the load, and the pressure gauge gives the specific pressure value. Excavate the soil on one side of the support pile. After reaching the designated position, pour the cementitious material into the anchor rod casing. At the same time, pull out the pipe while pouring. Then construct the inclined support, excavate step by step downward, and successively construct the anchor rod and the inclined support according to the above steps until the bottom of the foundation pit is excavated, and adjust the one-way hydraulic jack according to the corresponding set pressure value.

[0022] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0023] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An integrated support model for foundation pit retaining piles and anchor struts, characterized in that: It includes a pressure support bottom plate (1), a pressure support platform (2), a unidirectional hydraulic jack (3), a hydraulic jack support (4), a load transfer rod (5), a pressure gauge (6), a vertical load transfer rod (7), a model box (8), a diagonal support platform (9), a pile casing (10), fastening bolts (11), an anchor casing support (12), an anchor casing (13), a universal opening joint (14), a transverse hanging bracket (15), a pile casing limit plate (16), a load plate vertical connecting rod (17), a load plate (18), a main support (19), a pin bolt screw (20), a support platform (21) and a reinforcement flat plate (22); the pressure support bottom plate (1) is rigidly connected to the pressure support platform (2), hydraulic jack supports (4) and pressure gauges (6) are respectively arranged at both ends of the pressure support platform (2), one end of the hydraulic jack support (4) is connected to one end of the unidirectional hydraulic jack (3) by bolts, the other end of the unidirectional hydraulic jack (3) is connected to the vertical load transfer rod (7) through the load transfer rod (5), one end of the vertical load transfer rod (7) is connected to the pressure gauge (6), and the other end is rigidly connected to the main support (19), one end of the load plate vertical connecting rod (17) is rigidly connected to the load plate (18), and one end is hinged to the main support (19) by bolts, the main support (19) is hinged to the support platform (21) through the pin bolt screw (20), reinforcement flat plates (22) are arranged on both sides of the support platform (21), the pile casing (10) is sleeved in the transverse hanging bracket (15), a pile casing limit plate (16) is arranged at the upper part of the pile casing (10), fastening bolts (11) are arranged on the side surface of the transverse hanging bracket (15), the anchor casing support (12) is rigidly connected to the transverse hanging bracket (15), a universal opening joint (14) is arranged in the anchor casing support (12), the anchor casing (13) is sleeved in the universal opening joint (14), the transverse hanging bracket (15) is spanned on both sides of the model box (8), after fixation, the pile casing (10) is sleeved in the transverse support, adjusted to the specified position, the fastening bolts are tightened, the anchor casing (13) is sleeved into the universal opening joint (14), the length and angle are adjusted, after adjustment, the soil in the model box (8) is compacted, then a gelling material is poured into the pile casing (10), after reaching the curing age, a load is applied, the soil on one side of the supporting pile is excavated, after reaching the specified position, a gelling material is poured into the anchor casing (13), then a diagonal support is constructed, and excavation is carried out step by step downwards.

2. The integrated support model of foundation pit retaining pile and anchor strut according to claim 1, characterized in that: When the unidirectional hydraulic jack (3) moves downward, it drives the vertical load transfer rod (7) to move downward through the load transfer rod (5), and at the same time, the pressure of the pressure gauge (6) directly below the vertical load transfer rod (7) changes to give a pressure value.

3. The integrated support model of foundation pit retaining pile and anchor strut according to claim 1, characterized in that: During the process of the unidirectional hydraulic jack (3) moving downward, the load plate vertical connecting rod (17) drives the load plate (18) to move downward.

4. The integrated support model of foundation pit retaining pile and anchor strut according to claim 1, characterized in that: The pile casing (10) can move up and down in the transverse hanging bracket (15), and the pile length is controlled by the pile casing limit plate (16).

5. The integrated support model of foundation pit retaining pile and anchor strut according to claim 1, characterized in that: The anchor casing (13) can move up, down, left and right in the universal opening joint (14) in the anchor casing support (12).

6. The integrated support model of foundation pit retaining pile and anchor strut according to claim 1, characterized in that: When pouring materials, the pile casing (10) is pulled upward along the transverse hanger (15), and the anchor rod casing (13) is pulled out along the universal opening joint (14).

7. A foundation pit support pile-anchor integrated support model according to claim 1, characterized in that: An inclined support platform (9) is provided on one inner wall of the model box (8).

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