Axial compression-resistant lattice type load box
The axially compressive lattice load box addresses sediment retention and deformation issues by using steel ring-connected lattice plates and radial anchor key devices, ensuring effective sediment discharge and rigid structure for accurate pile foundation testing.
Patent Information
- Application Number
- CN202421108444.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-21
AI Technical Summary
Existing load boxes used in pile foundation testing suffer from sediment retention issues and structural deformation during concrete pouring, leading to test failures and inadequate axial bearing performance.
An axially compressive lattice load box with a first and second lattice plate, connected by steel rings and pressure units, featuring radial anchor key devices for anchoring in soil, and hydraulic mechanisms for synchronized displacement control.
Enhances sediment discharge, improves structural rigidity, and maintains load test balance, ensuring accurate axial bearing capacity evaluation.
Smart Images
Figure CN222295100U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of load boxes, and in particular relates to an axial compression lattice type load box. Background Art
[0002] As pile foundations are widely used by designers in construction, transportation, docks, railways and other projects, in order to ensure the safety of the project, the axial bearing performance of the pile foundation needs to be optimized in the engineering design; at the same time, in order to accurately evaluate the axial bearing capacity of the engineering piles, it is necessary to carry out on-site tests on the bearing capacity of the piles. Due to the widespread use of the self-balancing method for pile foundation bearing capacity detection, one or more detection equipment load boxes need to be embedded in the pile body during construction to load step by step. When pouring concrete, the sediment at the bottom of the pile is easy to be retained in the upper and lower parts of the load box to cause pile body defects. The local deformation of the load box during the loading process is too large, resulting in test failure. The above problems existing in real projects have caused difficulties in the design and use of pile foundation projects.
[0003] At present, there are many complete sets of equipment at home and abroad, but the structural design is relatively simple, ignoring the safety of its own structural strength and the sediment retention defects when concrete passes through. Therefore, the market urgently needs a load box that can enhance the axial compressive resistance. Utility Model Content
[0004] The utility model aims at the deficiencies in the prior art and provides an axially compressive lattice load box, which has strong axial compressive resistance and can effectively discharge pile bottom sediment.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] An axially compressive lattice load box comprises a first lattice plate, a second lattice plate and a pressure unit; the first lattice plate and the second lattice plate are coaxially distributed up and down; the pressure unit is arranged between the first lattice plate and the second lattice plate to drive the second lattice plate to move in a direction away from the first lattice plate; the first lattice plate and the second lattice plate both comprise an outer steel ring, an intermediate steel ring, an inner steel ring and a connecting rib plate; the outer steel ring, the intermediate steel ring and the inner steel ring are independent of each other and coaxially distributed; the connecting rib plate connects the outer steel ring, the intermediate steel ring and the inner steel ring.
[0007] Optionally, the connecting ribs are grouped into three and are parallel to each other; multiple groups of the connecting ribs surround the inner steel ring; and there is one or more intermediate steel rings.
[0008] Optionally, the pressure unit is a jack; the cylinder sleeve of the jack is welded on the first lattice plate, and the piston rod of the jack is welded on the second lattice plate; a first oil inlet pipe and a first oil outlet pipe are arranged on the cylinder sleeve of the jack; there are four pressure units, which are distributed in a ring shape; all of the first oil inlet pipes and the first oil outlet pipes extend out of the first lattice plate from the gaps in the first lattice plate, and are connected to the first hydraulic conveying mechanism.
[0009] Optionally, a plurality of first displacement wires are connected to the first lattice plate, and a plurality of second displacement wires are connected to the second lattice plate; a first radial anchor key device is provided on the first lattice plate, and a second radial anchor key device is provided on the second lattice plate; when the displacement deformation of all the first displacement wires is not synchronized, the first radial anchor key device is actuated to anchor the first radial anchor key device in the rock and soil around the pile; when the displacement deformation of all the second displacement wires is not synchronized, the second radial anchor key device is actuated to anchor the second radial anchor key device in the rock and soil around the pile.
[0010] Optionally, the first radial anchor key device and the second radial anchor key device both include an anchor key cylinder sleeve, an anchor key arm and an anchor key head; the anchor key cylinder sleeve is penetrated by an outer steel ring and an intermediate steel ring, and is connected to the outer circumferential surface of an inner steel ring; one end of the anchor key arm can move back and forth in the anchor key cylinder sleeve, and the other end is connected to the anchor key head; the second oil inlet pipe and the second oil outlet pipe are connected to the anchor key cylinder sleeve, and the second oil outlet pipe is close to the outer steel ring, and the second oil inlet pipe is close to the inner steel ring.
[0011] Optionally, the anchor key head is a cone or a quadrangular pyramid; limit blocks are provided on both the first lattice plate and the second lattice plate; the limit blocks are fixedly connected to the connecting ribs; the limit blocks are located outside the anchor key cylinder sleeve and abut against the end face of the anchor key cylinder sleeve close to the outer steel ring to prevent the anchor key arm from falling off from the anchor key cylinder sleeve.
[0012] Optionally, there are multiple first radial anchor key devices and multiple second radial anchor key devices, multiple first radial anchor key devices are grouped in pairs and arranged side by side, and multiple second radial anchor key devices are grouped in pairs and arranged side by side; multiple groups of first radial anchor key devices and multiple groups of second radial anchor key devices all surround the inner steel ring for one week; the first radial anchor key device and the second radial anchor key device are staggered in the axial direction of the inner steel ring.
[0013] Optionally, the driving oil circuits of all the first radial anchor key devices are connected, and the driving oil circuits of all the second radial anchor key devices are connected; and the driving oil circuits of the first radial anchor key devices and the second radial anchor key devices are both connected to the second hydraulic delivery mechanism.
[0014] The beneficial effects of the utility model are:
[0015] (1) The hollow structure of the first lattice plate and the second lattice plate can effectively discharge the sediment at the bottom of the pile, and at the same time improve the density of the load box and the concrete pouring. The connecting ribs connect the outer steel ring, the middle steel ring and the inner steel ring as a whole, which can ensure the rigidity of the first lattice plate and the second lattice plate and avoid deformation, thereby enhancing the overall axial compressive capacity of the load box.
[0016] (2) A first radial anchor key device is provided on the first lattice plate, and a second radial anchor key device is provided on the second lattice plate. The provision of the first radial anchor key device and the second radial anchor key device can solve the problem of balance point error during the self-balancing method detection process, thereby continuing to maintain the load test. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model when the anchor key arm is located at the initial position;
[0018] Figure 2 It is a schematic diagram of the overall structure of the utility model when the anchor key arm is ejected;
[0019] Figure 3 yes Figure 1 Schematic diagram of the AA section structure;
[0020] Figure 4 yes Figure 1 Schematic diagram of the BB cross-section structure;
[0021] Figure 5 Schematic diagram of the distribution position of the first oil inlet pipe and the first oil outlet pipe of the jack;
[0022] Figure 6 It is a structural schematic diagram of the anchor key head.
[0023] Markings in the figure are: 1 is the first lattice plate, 101 is the outer steel ring, 102 is the middle steel ring, 103 is the inner steel ring, 104 is the connecting rib, 2 is the second lattice plate, 3 is the pressure unit, 31 is the first oil inlet pipe, 32 is the first oil outlet pipe, 4 is the first hydraulic conveying mechanism, 5 is the first displacement wire, 6 is the second displacement wire, 7 is the first radial anchor key device, 8 is the second radial anchor key device, 9 is the anchor key cylinder sleeve, 10 is the anchor key arm, 11 is the anchor key head, 12 is the limit block, 13 is the second hydraulic conveying mechanism, 14 is the second oil inlet pipe, and 15 is the second oil outlet pipe. DETAILED DESCRIPTION
[0024] The utility model is described in detail below with reference to the accompanying drawings.
[0025] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "back", etc. used in the utility model are only for the convenience of description and are not used to limit the scope of implementation of the utility model. Changes or adjustments in their relative relationships should be regarded as the scope of implementation of the utility model without substantially changing the technical content.
[0026] like Figure 1-4 As shown, an axially compressive lattice load box comprises a first lattice plate 1, a second lattice plate 2 and a pressure unit 3; the first lattice plate 1 and the second lattice plate 2 are coaxially distributed up and down; the first lattice plate 1 and the second lattice plate 2 have the same cross-sectional area; the pressure unit 3 is arranged between the first lattice plate 1 and the second lattice plate 2 to drive the second lattice plate 2 to move in a direction away from the first lattice plate 1.
[0027] As an option, the pressure unit 3 is a jack; the cylinder sleeve of the jack is welded to the first lattice plate 1, and the piston rod of the jack is welded to the second lattice plate 2; there are four pressure units 3, which are distributed in a ring shape; in some other embodiments, the number of the pressure units 3 can be adjusted according to actual design requirements; the pressure unit 3 is directly welded to the first lattice plate 1 and the second lattice plate 2, which can ensure the connection strength while using the first lattice plate 1 and the second lattice plate 2 structure to effectively discharge the sediment at the bottom of the pile, while improving the density of the load box and the concrete pouring.
[0028] like Figure 3 and 4 As shown, the first lattice plate 1 and the second lattice plate 2 both include an outer steel ring 101, an intermediate steel ring 102, an inner steel ring 103 and a connecting rib 104; the outer steel ring 101, the intermediate steel ring 102 and the inner steel ring 103 are independent of each other and coaxially distributed; the connecting rib 104 extends along the radial direction of the lattice plate to connect the outer steel ring 101, the intermediate steel ring 102 and the inner steel ring 103 into a whole, the inner diameter of the inner steel ring 103 is the inner hole of the load box, and the heights of the outer steel ring 101, the intermediate steel ring 102 and the inner steel ring 103 can be determined according to actual design requirements; the connecting rib 104 is connected to the outer steel ring 101, the intermediate steel ring 102 and the inner steel ring 103 by welding; the setting of the three-layer steel ring can ensure rigidity and is not easy to deform, thereby enhancing the overall axial compression resistance of the load box.
[0029] Furthermore, the connecting ribs 104 are grouped into three and are parallel to each other; multiple groups of the connecting ribs 104 surround the inner steel ring 103; the middle steel ring 102 has one or more, and there are multiple groups of connecting ribs 104, and each group has multiple, which can enhance the connection strength of the outer steel ring 101, the middle steel ring 102 and the inner steel ring 103.
[0030] like Figure 5 As shown, a first oil inlet pipe 31 and a first oil outlet pipe 32 are arranged on the cylinder sleeve of the jack; the first oil inlet pipe 31 and the first oil outlet pipe 32 are located at two ends of the same diameter of the cylinder sleeve of the jack; all of the first oil inlet pipes 31 and the first oil outlet pipes 32 extend out of the first lattice plate 1 from the gaps in the first lattice plate 1 and are connected to the first hydraulic delivery mechanism 4, which can be a hydraulic oil pump.
[0031] In some other embodiments, a plurality of first displacement wires 5 are connected to the first lattice plate 1, and a plurality of second displacement wires 6 are connected to the second lattice plate 2; a first radial anchor key device 7 is provided on the first lattice plate 1, and a second radial anchor key device 8 is provided on the second lattice plate 2; when the displacement deformation of all the first displacement wires 5 is not synchronized, the first radial anchor key device 7 is actuated to anchor the first radial anchor key device 7 in the rock and soil around the pile; when the displacement deformation of all the second displacement wires 6 is not synchronized, the second radial anchor key device 8 is actuated to anchor the second radial anchor key device 8 in the rock and soil around the pile; the first displacement wire 5 is usually connected to a monitoring system for self-balancing detection, so that changes in the first displacement wire 5 and the second displacement wire 6 can be detected in real time. The structures of the first displacement wire 5 and the second displacement wire 6 can refer to the prior art. When the first radial anchor key device 7 is anchored in the rock and soil around the pile, the problem of balance point error of the self-balancing method can be solved, and the axial bearing capacity can be further increased to continue to maintain the load test.
[0032] The first radial anchor key device 7 and the second radial anchor key device 8 both include an anchor key cylinder sleeve 9, an anchor key arm 10 and an anchor key head 11; the anchor key cylinder sleeve 9 is penetrated by an outer steel ring 101 and an intermediate steel ring 102, and is connected to the outer circumferential surface of an inner steel ring 103; the anchor key cylinder sleeve 9 is welded to the first lattice plate 1 or the second lattice plate 2; one end of the anchor key arm 10 can move back and forth in the anchor key cylinder sleeve 9, and the other end is connected to the anchor key head 11; the second oil inlet pipe 14 and the second oil outlet pipe 15 are connected to the anchor key cylinder sleeve 9, and the second oil outlet pipe 15 is close to the outer steel ring 101, and the second oil inlet pipe 14 is close to the inner steel ring 103.
[0033] Specifically, Figure 6 As shown, the anchor key head 11 is a cone or a quadrangular pyramid; the first lattice plate 1 and the second lattice plate 2 are both provided with a limit block 12; the limit block 12 is fixedly connected to the connecting rib 104; the limit block 12 is located outside the anchor key cylinder sleeve 9 and abuts against the end surface of the anchor key cylinder sleeve 9 close to the outer steel ring 101 to prevent the anchor key arm 10 from falling off from the anchor key cylinder sleeve 9. There can be multiple limit blocks 12, which are distributed around the anchor key arm 10.
[0034] Specifically, there are a plurality of the first radial anchor key devices 7 and the second radial anchor key devices 8, and the plurality of the first radial anchor key devices 7 are grouped in pairs and arranged side by side, and the plurality of the second radial anchor key devices 8 are grouped in pairs and arranged side by side; the plurality of groups of first radial anchor key devices 7 and the plurality of groups of second radial anchor key devices 8 surround the inner steel ring 103 for one circle; the first radial anchor key devices 7 and the second radial anchor key devices 8 are staggered in the axial direction of the inner steel ring 103, and the first radial anchor key devices 7 and the second radial anchor key devices 8 are staggered, which can facilitate the arrangement of the driving oil circuit, and the first radial anchor key devices 7 and the second radial anchor key devices 8 are grouped in pairs, so as to improve the anchoring effect,
[0035] The driving oil circuits of all the first radial anchor key devices 7 are connected, and the driving oil circuits of all the second radial anchor key devices 8 are connected; the driving oil circuits of the first radial anchor key devices 7 and the second radial anchor key devices 8 are both connected to the second hydraulic delivery mechanism 13 .
[0036] Specifically, the second oil inlet pipe 14 of the first radial anchor key device 7 at the starting point is connected to the second hydraulic delivery mechanism 13, and the second oil outlet pipe 15 of the first radial anchor key device 7 at the end point is connected to the second hydraulic delivery mechanism 13, wherein the second oil outlet pipe 15 of one of the first radial anchor key devices 7 is connected to the second oil inlet pipe 14 of the first radial anchor key device 7 adjacent thereto, so that the anchor key cylinder sleeves 9 of all the first radial anchor key devices 7 are in communication, the second oil inlet pipe 14 of the second radial anchor key device 8 at the starting point is connected to the second hydraulic delivery mechanism 13, and the second oil outlet pipe 15 of the first radial anchor key device 7 is connected to the second oil inlet pipe 14 of the first radial anchor key device 7 adjacent thereto, so that the anchor key cylinder sleeves 9 of all the first radial anchor key devices 7 are in communication, The second oil outlet pipe 15 of the second radial anchor key device 8 is connected to the second hydraulic delivery mechanism 13, wherein the second oil outlet pipe 15 of one of the second radial anchor key devices 8 is connected to the second oil inlet pipe 14 of the second radial anchor key device 8 adjacent thereto, so that the anchor key cylinder sleeves 9 of all the second radial anchor key devices 8 are in communication, that is, when the first radial anchor key device 7 is in communication with the second hydraulic delivery mechanism 13, all the first radial anchor key devices 7 are anchored in the rock and soil around the pile in sequence, and when the second radial anchor key device 8 is in communication with the second hydraulic delivery mechanism 13, all the second radial anchor key devices 8 are anchored in the rock and soil around the pile in sequence.
[0037] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0038] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should be regarded as the protection scope of the utility model.
Claims
1. An axially compressive lattice load box, characterized in that: The invention comprises a first lattice plate (1), a second lattice plate (2) and a pressure unit (3); the first lattice plate (1) and the second lattice plate (2) are coaxially arranged up and down; the pressure unit (3) is arranged between the first lattice plate (1) and the second lattice plate (2) to drive the second lattice plate (2) to move in a direction away from the first lattice plate (1); the first lattice plate (1) and the second lattice plate (2) both comprise an outer steel ring (101), an intermediate steel ring (102), an inner steel ring (103) and a connecting rib (104); the outer steel ring (101), the intermediate steel ring (102) and the inner steel ring (103) are independent of each other and coaxially arranged; the connecting rib (104) connects the outer steel ring (101), the intermediate steel ring (102) and the inner steel ring (103).
2. The axially compressive lattice load box according to claim 1, characterized in that: The connecting ribs (104) are grouped in three and are parallel to each other; a plurality of groups of connecting ribs (104) surround the inner steel ring (103); and there is one or more intermediate steel rings (102).
3. The axially compressive lattice load box according to claim 1, characterized in that: The pressure unit (3) is a jack; the cylinder sleeve of the jack is welded to the first lattice plate (1), and the piston rod of the jack is welded to the second lattice plate (2); a first oil inlet pipe (31) and a first oil outlet pipe (32) are arranged on the cylinder sleeve of the jack; there are four pressure units (3) and they are distributed in a ring shape; all the first oil inlet pipes (31) and the first oil outlet pipes (32) extend out of the first lattice plate (1) from the gaps in the first lattice plate (1) and are connected to a first hydraulic conveying mechanism (4).
4. The axially compressive lattice load box according to claim 1, characterized in that: The first lattice plate (1) is connected to a plurality of first displacement wires (5), and the second lattice plate (2) is connected to a plurality of second displacement wires (6); the first lattice plate (1) is provided with a first radial anchor key device (7), and the second lattice plate (2) is provided with a second radial anchor key device (8); when the displacement deformation of all the first displacement wires (5) is not synchronous, the first radial anchor key device (7) is actuated to anchor the first radial anchor key device (7) in the rock and soil around the pile; when the displacement deformation of all the second displacement wires (6) is not synchronous, the second radial anchor key device (8) is actuated to anchor the second radial anchor key device (8) in the rock and soil around the pile.
5. The axially compressive lattice load box according to claim 4, characterized in that: The first radial anchor key device (7) and the second radial anchor key device (8) both comprise an anchor key cylinder sleeve (9), an anchor key arm (10) and an anchor key head (11); the anchor key cylinder sleeve (9) is provided with an outer steel ring (101) and an intermediate steel ring (102), and is connected to the outer circumferential surface of an inner steel ring (103); one end of the anchor key arm (10) can move back and forth in the anchor key cylinder sleeve (9), and the other end is connected to the anchor key head (11); the second oil inlet pipe (14) and the second oil outlet pipe (15) are connected to the anchor key cylinder sleeve (9), and the second oil outlet pipe (15) is close to the outer steel ring (101), and the second oil inlet pipe (14) is close to the inner steel ring (103).
6. The axially compressive lattice load box according to claim 5, characterized in that: The anchor key head (11) is a cone or a quadrangular pyramid; both the first lattice plate (1) and the second lattice plate (2) are provided with a limit block (12); the limit block (12) is fixedly connected to the connecting rib plate (104); the limit block (12) is located outside the anchor key cylinder sleeve (9) and abuts against the end surface of the anchor key cylinder sleeve (9) close to the outer steel ring (101) to prevent the anchor key arm (10) from falling off from the anchor key cylinder sleeve (9).
7. The axially compressive lattice load box according to claim 4, characterized in that: There are a plurality of the first radial anchor key devices (7) and the second radial anchor key devices (8), the plurality of the first radial anchor key devices (7) are grouped in pairs and arranged side by side, and the plurality of the second radial anchor key devices (8) are grouped in pairs and arranged side by side; the plurality of groups of the first radial anchor key devices (7) and the plurality of groups of the second radial anchor key devices (8) are all arranged around the inner steel ring (103); the first radial anchor key devices (7) and the second radial anchor key devices (8) are staggered in the axial direction of the inner steel ring (103).
8. The axially compressive lattice load box according to claim 7, characterized in that: The driving oil circuits of all the first radial anchor key devices (7) are interconnected, and the driving oil circuits of all the second radial anchor key devices (8) are interconnected; and the driving oil circuits of the first radial anchor key devices (7) and the second radial anchor key devices (8) are both connected to the second hydraulic delivery mechanism (13).