Testing device for simulating inclined strut of foundation pit supporting system

Abstract

The utility model provides a test device for simulating an inclined strut of a foundation pit supporting system. The test device comprises a wall body model and an inclined strut model, the wall model comprises a supporting table arranged at the bottom of a foundation pit and a supporting plate arranged on the side wall of the foundation pit. The inclined strut model comprises a first supporting rod and a second supporting rod, the first supporting rod is hinged to the supporting table, the second supporting rod is hinged to the supporting plate, and the second supporting rod is arranged outside the first supporting rod in a sleeving mode; a plurality of clamping grooves are formed in the first supporting rod, buckles are hinged to the second supporting rod and matched with the clamping grooves, and pressing parts are arranged at the ends, away from the clamping grooves, of the buckles. The length of the inclined strut device is convenient to adjust, and the phenomenon that the inclined strut slides when bearing large force is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a foundation pit support technical field especially relates to a test device of simulation foundation pit support system inclined support. BACKGROUND

[0002] The safety of foundation pit engineering is an important guarantee for the development and utilization of urban underground space, and the development and utilization of urban underground space will inevitably involve large-scale deep foundation pit excavation, so the problem of deep foundation pit engineering with a large size has become an important field of geotechnical engineering. During the deep foundation pit excavation process, the diaphragm wall with internal support support system, as a common foundation pit support form, is widely used in practical engineering, and more accurate simulation of high-clearance deep foundation pit support system support change is a problem that needs to be solved in deep foundation pit group excavation model test.

[0003] At present, the internal support model component used in model test is ordinary PVC pipe material, both ends of which are hinged and fixed with the diaphragm wall by bolts, and the axial force of the support is measured by strain gauges. The traditional internal support device cannot adjust the prestress value of the internal support on the one hand, and the strain gauges are complex to paste, the strain gauges are easy to damage, the data acquisition is cumbersome, and when multiple axial forces of supports need to be measured at the same time, the operation is more complex. Due to uncontrollable environmental factors, line fault factors and other problems, the data measurement is not accurate, which makes the development of related scientific research work meet certain resistance.

[0004] In addition, in the past model test of foundation pit excavation and support, the internal support is mostly placed horizontally, the support device is connected to the two side walls, and the position and distance are fixed. With the increase of the depth and width of the foundation pit excavation, the support form with horizontal connection to the two side walls requires large size of materials and is difficult to install, which is difficult to be used in actual working conditions.

[0005] The utility model with publication number CN209353352U discloses a foundation pit inclined support device, which comprises a fence, an inclined support device, wherein the fence right side is fixed with a fixed frame connecting seat through a fixed bolt, the fixed frame connecting seat right side is provided with the inclined support device, the inclined support device is composed of a threaded sleeve at both ends of a threaded column and a base connected by a lower threaded column;The base left end is connected with a connecting rod, the connecting rod left end is connected with the fence bottom through a rotating shaft;The fixed frame connecting seat top is provided with a display screen and a horizontal sensor and a battery block connected below the fixed frame connecting seat. However, the threaded sleeve and the threaded column are connected by threads, and the inclined support is prone to slipping when the force is large. UTILITY MODEL CONTENTS

[0006] The utility model aims at solving the defects in the prior art, and provides a test device for simulating the inclined support of a foundation pit support system, which is convenient for adjusting the length of the inclined support device and avoids the slipping phenomenon when the force on the inclined support is large.

[0007] To achieve the above object, the utility model provides a test device of simulation foundation pit support system inclined support, including wall model and inclined support model,

[0008] The wall model includes the support platform arranged at the bottom of the foundation pit and the support plate arranged at the sidewall of the foundation pit,

[0009] The inclined support model includes the first support rod and the second support rod, the first support rod is hinged with the support platform, the second support rod is hinged with the support plate, and the second support rod is sleeved outside the first support rod,

[0010] A plurality of clamping grooves are arranged on the first support rod, the buckle is hinged on the second support rod, the buckle is matched with the clamping groove, and the end of the buckle away from the clamping groove is provided with a pressing part.

[0011] The test device of simulation foundation pit support system inclined support includes the wall model and the inclined support model, the wall model includes the support platform arranged at the bottom of the foundation pit and the support plate arranged at the sidewall of the foundation pit, a plurality of connecting holes are arranged on the support platform and the support plate, the first support rod can be hingedly fixed at different positions of the support platform through bolts, and the second support rod can be hingedly fixed at different heights of the support plate through bolts.

[0012] The inclined support model includes the first support rod and the second support rod. A plurality of clamping grooves are arranged on the first support rod, the buckle is hinged on the second support rod, the buckle is matched with the clamping groove, and the end of the buckle away from the clamping groove is provided with a pressing part.

[0013] The utility model can adjust the inclined support model, the connection position of the inclined support model and the wall model and the length of the inclined support model can be adjusted, the simulation needs of foundation pit excavation supporting at different heights can be met, the wall model and the inclined support model can be repeatedly used, a same set of test device can be used to carry out the test of different height foundation pit support, and the test cost is effectively saved.

[0014] The buckle and the clamping groove are adopted, the connection of the first support rod and the second support rod is realized, the sliding phenomenon when the inclined support is stressed is effectively solved. And the fixing device of the first support rod does not need to be disassembled in the extension process of the inclined support model, only by pressing the pressing part, pulling the first support rod, making the end of the buckle lift and clamping into different clamping grooves, the extension can be quickly carried out, the modification of the test device is reduced, the working principle is simple, the operation is convenient, and great practicability is obtained.

[0015] Optionally, a buckle seat is arranged between the second support rod and the buckle, and the buckle is hinged to the buckle seat.

[0016] Optionally, an elastic member is arranged between the pressing part and the buckle seat, so that the pressing part can return to the original position after being pressed and the buckle can be prevented from being pulled out of the buckle slot.

[0017] Optionally, a first screw is arranged between the first support rod and the support table, and the first screw is hinged to the support table.

[0018] A first screw is arranged between the first support rod and the support table, and the first screw is hinged to the support table. By adjusting the depth of the first screw screwed into the first support rod, the length of the diagonal brace can be finely adjusted to ensure that the diagonal brace is tightly supported by the wall body during the test and accurately applies stress.

[0019] Optionally, a threaded hole is arranged at one end of the first support rod adjacent to the first screw, and the first support rod is connected to the first screw through the threaded hole.

[0020] A threaded hole is arranged at one end of the first support rod, and the first screw is connected to the first support rod through the threaded hole. By rotating the first screw or the first support rod, the depth of the first screw screwed into the first support rod can be adjusted to finely adjust the length of the diagonal brace model.

[0021] Optionally, a second screw is arranged between the second support rod and the support plate, and the second screw is hinged to the support plate.

[0022] A second screw is arranged between the second support rod and the support plate, and the second screw is hinged to the support plate. By adjusting the depth of the second screw screwed into the second support rod, the length of the diagonal brace can be finely adjusted to ensure that the diagonal brace is tightly supported by the wall body during the test and accurately applies stress.

[0023] Optionally, a threaded hole is arranged at one end of the second support rod adjacent to the second screw, and the second support rod is connected to the second screw through the threaded hole.

[0024] A threaded hole is arranged at one end of the second support rod, and the second screw is connected to the second support rod through the threaded hole. By rotating the second screw or the second support rod, the depth of the second screw screwed into the second support rod can be adjusted to finely adjust the length of the diagonal brace model.

[0025] Optionally, the diagonal brace model further comprises a pressure sensor.

[0026] A pressure sensor is arranged in the middle of the diagonal brace model, and the pressure sensor is connected to a computer. The pressure sensor can obtain accurate axial pressure values of the diagonal brace model, avoiding the cumbersome operation of measuring the inner support pressure by using strain gauges in the traditional test method, and making the test device more accurate, simple, reliable and efficient.

[0027] Beneficial effects:

[0028] The utility model discloses a wall model and a diagonal bracing model, the wall model includes the support platform of being located at the base pit bottom and the support plate of being located at the base pit side wall, all be provided with a plurality of connecting holes on support platform and support plate, can first support rod is fixed in the different position of support platform through bolt hinged joint, can second support rod is fixed on the different height of support plate through bolt hinged joint.

[0029] The diagonal bracing model includes a first support rod and a second support rod. A plurality of clamping grooves are formed on the first support rod, and a clamping buckle is hinged to the second support rod. By pressing the pressing portion, one end of the clamping buckle is lifted and clamped into the clamping groove, thereby realizing the connection of the first support rod and the second support rod. In use, the first support rod is hinged to the support platform, and the second support rod is hinged to the support plate, thereby stably connecting the diagonal bracing model and the wall model. By clamping the clamping buckle into different clamping grooves, the connection position of the first support rod and the second support rod is adjusted, and the support length of the diagonal bracing model is adjusted to exert prestress.

[0030] The utility model can adjust the diagonal bracing model. By adjusting the connection position of the diagonal bracing model and the wall model and the length of the diagonal bracing model, the simulation needs of supporting the foundation pit excavation at different heights can be met. The wall model and the diagonal bracing model can be repeatedly used. The same set of test devices can be used to carry out tests on different groups of foundation pit supports at different heights, thereby effectively saving test costs.

[0031] The clamping buckle and the clamping groove are used to realize the connection of the first support rod and the second support rod, thereby effectively solving the sliding phenomenon of the diagonal bracing under large stress. In the extension and contraction process of the diagonal bracing model, the fixing device of the first support rod does not need to be disassembled. By pressing the pressing portion and pulling the first support rod, one end of the clamping buckle is lifted and clamped into different clamping grooves, thereby realizing rapid extension and contraction, reducing the modification of the test device, and having simple working principle, convenient operation and great practicability. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creating any creative labor.

[0033] Figure 1 The structure diagram of the test device for simulating the diagonal bracing of the foundation pit support system disclosed by the utility model is shown in the figure.

[0034] Figure 2 The structure diagram of the wall model in the test device for simulating the diagonal bracing of the foundation pit support system disclosed by the utility model is shown in the figure.

[0035] Figure 3 The utility model discloses a structure diagram of the inclined support model in the test device of the simulation foundation pit support system inclined support,

[0036] Figure 4 The utility model discloses a structure diagram of the buckle in the test device of the simulation foundation pit support system inclined support.

[0037] Reference signs:

[0038] 1 support platform, 2 support plate, 3 connecting hole, 4 first support rod, 41 clamping groove, 5 first screw rod, 6 second support rod, 61 buckle seat, 62 buckle, 63 pressing part, 64 elastic piece, 7 second screw rod.

[0039] The utility model discloses the realization, functional characteristics and advantages will combine the embodiment, and further explanation is made with reference to the drawings. Specific implementation

[0040] The technical scheme in the embodiment of the utility model will be described clearly and completely in the drawings in the embodiment of the utility model, and obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment of the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of the utility model protection.

[0041] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection should be understood broadly, and the person skilled in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.

[0042] In the description of the utility model, the description of reference terms "an embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable way.

[0043] Referring to Figures 1-4 , a test device of simulation foundation pit support system inclined support according to the embodiment of the utility model, including wall model and inclined support model,

[0044] The wall model includes a support platform 1 arranged at the bottom of the foundation pit and a support plate 2 arranged at the sidewall of the foundation pit.

[0045] The diagonal bracing model comprises a first support rod 4 and a second support rod 6, the first support rod 4 is hinged with the support table 1, the second support rod 6 is hinged with the support plate 2, and the second support rod 6 is sleeved outside the first support rod 4;

[0046] A plurality of clamping grooves 41 are arranged on the first support rod 4, and a buckle 62 is hinged on the second support rod 6, the buckle 62 is matched with the clamping grooves 41, and a pressing portion 63 is arranged at one end of the buckle 62, away from the clamping grooves 41.

[0047] Specifically, the test device for simulating the diagonal bracing of the foundation pit support system comprises a wall model and an aluminum pipe made diagonal bracing model, the wall model comprises a support table 1 arranged at the bottom of the foundation pit and a support plate 2 arranged at the sidewall of the foundation pit, a plurality of connecting holes 3 are arranged on the support table 1 and the support plate 2, the first support rod 4 can be hingedly fixed at different positions of the support table 1 by bolts, and the second support rod 6 can be hingedly fixed at different heights of the support plate 2 by bolts.

[0048] The diagonal bracing model comprises a first support rod 4 and a second support rod 6. The first support rod 4 is a hollow aluminum pipe, and a plurality of clamping grooves 41 are formed in the first support rod 4. The second support rod 6 is hinged with a buckle 62. By pressing the pressing portion 63, one end of the buckle 62 is lifted and clamped into the clamping groove 41, thereby realizing the connection between the first support rod 4 and the second support rod 6. In use, the first support rod 4 is hinged with the support table 1, and the second support rod 6 is hinged with the support plate 2, thereby stably connecting the diagonal bracing model with the wall model. By clamping the buckle 62 into different clamping grooves 41, the connection position of the first support rod 4 and the second support rod 6 is adjusted, and the support length of the diagonal bracing model is adjusted to apply prestress.

[0049] The utility model discloses adjustable diagonal bracing model, through adjusting the connection position of diagonal bracing model and wall model and the length of diagonal bracing model, can satisfy the simulation need of the support of foundation pit excavation at different heights, and wall model and diagonal bracing model can be repeatedly used, can adopt the same set test device to carry out the test of different height foundation pit support of many groups, and effective saving test cost.

[0050] The buckle 62 and the clamping groove 41 are adopted to realize the connection between the first support rod 4 and the second support rod 6, thereby effectively solving the sliding phenomenon when the diagonal bracing is subjected to large stress. Moreover, the fixing device of the first support rod 4 does not need to be disassembled during the extension and contraction of the diagonal bracing model, and by only pressing the pressing portion 63 and pulling the first support rod 4, one end of the buckle 62 is lifted and clamped into different clamping grooves 41, so that the extension and contraction can be quickly carried out, the modification of the test device is reduced, the working principle is simple, the operation is convenient, and great practicability is achieved.

[0051] Referring to Figure 3 In some embodiments of the utility model, a buckle seat 61 is arranged between the second support rod 6 and the buckle 62, and the buckle 62 is hinged with the buckle seat 61.

[0052] Referring to Figure 4 In some embodiments of the utility model, the press part 63 and buckle seat 61 are equipped with elastic piece 64, make press part 63 can restore to the original position after pressing, and can avoid buckle 62 from the card slot 41 and come off.

[0053] Referring to Figure 1 And 3 In some embodiments of the utility model, the first support rod 4 and support table 1 are equipped with first screw rod 5, and the first screw rod 5 is hinged with support table 1.

[0054] The first support rod 4 and support table 1 are equipped with first screw rod 5, and the first screw rod 5 is hinged with support table 1, by adjusting the depth of first screw rod 5 screwed into first support rod 4, the length of inclined support is fine adjusted, and the inclined support is ensured to be closely supported on the wall body during the test process, and stress is accurately applied.

[0055] Referring to Figure 1 And 3 In some embodiments of the utility model, the first support rod 4 is equipped with screw hole near one end of first screw rod 5, and the first support rod 4 is connected with first screw rod 5 through screw hole.

[0056] The first support rod 4 is equipped with screw hole, and the first screw rod 5 is connected with the first support rod 4 through the screw hole, and the depth of first screw rod 5 is adjusted by rotating first screw rod 5 or first support rod 4, and the length of inclined support model is fine adjusted.

[0057] Referring to Figure 1 And 3 In some embodiments of the utility model, the second support rod 6 and support plate 2 are equipped with second screw rod 7, and the second screw rod 7 is hinged with support plate 2.

[0058] The second support rod 6 and support plate 2 are equipped with second screw rod 7, and the second screw rod 7 is hinged with support plate 2, by adjusting the depth of second screw rod 7 screwed into second support rod 6, the length of inclined support is fine adjusted, and the inclined support is ensured to be closely supported on the wall body during the test process, and stress is accurately applied.

[0059] Referring to Figure 1 And 3 In some embodiments of the utility model, the second support rod 6 is equipped with screw hole near one end of second screw rod 7, and the second support rod 6 is connected with second screw rod 7 through screw hole.

[0060] One end of the second support rod 6 is provided with a threaded hole, the second screw rod 7 is connected with the second support rod 6 through the threaded hole, the second screw rod 7 or the second support rod 6 is rotated, the screwing depth of the second screw rod 7 can be adjusted, and the length of the diagonal bracing model is slightly adjusted.

[0061] Referring to Figure 1 Figure 1 In some embodiments of the utility model, the diagonal bracing model further comprises a pressure sensor.

[0062] The pressure sensor is arranged in the middle of the diagonal bracing model and is connected with a computer, accurate axial pressure values of the diagonal bracing model can be obtained through the pressure sensor, the complicated operation of measuring the inner support pressure by using strain gauges in the traditional test method is avoided, and the test device is more accurate, simple, reliable and efficient.

[0063] The above are only preferred embodiments of the utility model, and do not limit the patent range of the utility model, and any equivalent structural transformation, direct / indirect application in other related technical fields under the utility model concept of the utility model are included in the patent protection range of the utility model.

Claims

1. A test device for simulating a diagonal bracing system of a foundation pit support system, characterized by, The wall model and the inclined support model are included; The wall model includes a support platform arranged at the bottom of the foundation pit and a support plate arranged at the sidewall of the foundation pit; The inclined support model includes a first support rod and a second support rod, the first support rod is hinged with the support platform, the second support rod is hinged with the support plate, and the second support rod is sleeved outside the first support rod; A plurality of clamping grooves are arranged on the first support rod, a clamping buckle is hinged on the second support rod, the clamping buckle is matched with the clamping groove, and a pressing portion is arranged at the end of the clamping buckle away from the clamping groove.

2. The test device for simulating the bracing system of a foundation pit according to claim 1, wherein A clamping buckle seat is arranged between the second support rod and the clamping buckle, and the clamping buckle is hinged with the clamping buckle seat.

3. The test device for simulating the diagonal bracing of a sheet pile wall according to claim 2, wherein An elastic member is arranged between the pressing portion and the clamping buckle seat.

4. The test device for simulating the bracing system of a foundation pit support system diagonal according to claim 1, characterized in that, A first screw rod is arranged between the first support rod and the support platform, and the first screw rod is hinged with the support platform.

5. The test device for simulating the bracing system of a foundation pit support system diagonal according to claim 4, characterized in that, A threaded hole is arranged at the end of the first support rod adjacent to the first screw rod, and the first support rod is connected with the first screw rod through the threaded hole.

6. The test apparatus for simulating the bracing system of a foundation pit support system according to claim 1, wherein A second screw rod is arranged between the second support rod and the support plate, and the second screw rod is hinged with the support plate.

7. The test device for simulating the bracing system of a foundation pit support system diagonal according to claim 6, characterized in that, A threaded hole is arranged at the end of the second support rod adjacent to the second screw rod, and the second support rod is connected with the second screw rod through the threaded hole.

8. The test apparatus for simulating the bracing system of a foundation pit support system diagonal according to claim 1, characterized in that, The inclined support model further includes a pressure sensor.

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