CN219430846U - Load box - Google Patents
Load box Download PDFInfo
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- CN219430846U CN219430846U CN202320804014.3U CN202320804014U CN219430846U CN 219430846 U CN219430846 U CN 219430846U CN 202320804014 U CN202320804014 U CN 202320804014U CN 219430846 U CN219430846 U CN 219430846U
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Abstract
The utility model relates to the technical field of pile foundation detection, and particularly discloses a load box which comprises a box body and stirrups, wherein the stirrups are positioned at the bottom of the load box and are fixedly connected with the box body; the box is annular, the box top is equipped with the upper cover plate, be equipped with the spacer bar on the upper cover plate, spacer bar and upper cover plate fixed connection, spacer bar evenly distributed is on the upper cover plate. According to the scheme, the positioning steel bars are arranged to conveniently position the steel bars for installing the steel bar cage, meanwhile, the steel bars of the steel bar cage are not easy to incline in the welding process, and the error of the load box test data is reduced; the positioning steel bars have a certain length and good tolerance, and after the main steel bars of the steel bar cages with different heights can be connected, the end parts of the main steel bars of the steel bar cages can be flush.
Description
Technical Field
The utility model relates to the technical field of pile foundation detection, in particular to a load box.
Background
The load box is a loading jacking device special for pile foundation detection by a self-balancing method (self-reaction method). The self-balancing method for bearing capacity of foundation pile is characterized by that a specially-made loading device-load box is pre-buried in the pile body interior, before concrete is poured, the loading device and the reinforcing cage are buried in the correspondent position in the pile together (the concrete position is defined according to different purposes and conditions of test), the pressurizing pipe of the load box and other required testing devices (displacement rod, protecting pipe and stress meter, etc.) are led from pile body to ground, then the pile is poured. After the rest age, the pressurizing pump pressurizes and loads the load box on the ground through a pre-buried pipeline, so that the load box generates forces in an upper direction and a lower direction and transmits the forces to the pile body. Because of pile body self-forming reaction force, data equivalent to two static load tests are obtained: the upper part of the load box is provided with corresponding reaction parameters of the upper pile body during reverse loading; and the corresponding reaction parameters of the lower pile body under forward loading are obtained at the lower part of the load box. Through calculation and analysis of the relation between the loading force and the parameters (displacement, stress, etc.), a series of data such as pile foundation bearing capacity, pile end bearing capacity, side friction resistance, friction resistance conversion coefficient, etc. can be obtained.
When the reinforcement cage is welded on the load box at present, the length of the reinforcement cage has errors, and after the reinforcement is installed, the height of the reinforcement has errors, so that the errors of the test data of the load box are larger; if the high steel bars are welded and the multi-welding fusion parts are kept to be consistent in height, the direction of the steel bars is easy to incline in the welding process, so that the steel bars are not perpendicular to the load box, and the error of the test data of the load box is larger.
Disclosure of Invention
The utility model aims to provide a load box so as to solve the problem of larger error of load box test data caused by the length error of the steel bars of a steel bar cage.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the load box comprises a box body, stirrups and a laser emitter, wherein the stirrups are positioned at the bottom of the load box and are fixedly connected with the box body; the box is annular, the box top is equipped with the upper cover plate, be equipped with the spacer bar on the upper cover plate, spacer bar and upper cover plate fixed connection, spacer bar evenly distributed is on the upper cover plate, laser emitter is located upper cover plate center department, and its irradiation direction is perpendicular to upper cover plate
The technical scheme of the application is as follows: the stirrup is welded at the bottom of the load box, then the upper cover plate is connected with the load box, then the positioning steel bar is welded on the upper cover plate, the main steel bar on the steel reinforcement cage is welded with the positioning steel bar, the lower main steel bar of the steel reinforcement cage is welded with the stirrup, the steel bars of the steel reinforcement cage are conveniently positioned and installed by arranging the positioning steel bar, and meanwhile the steel bars of the steel reinforcement cage are not easy to incline in the welding process, so that the error of the test data of the load box is reduced; the positioning steel bars have a certain length and good tolerance, and after the positioning steel bars are connected with the main steel bars of the steel reinforcement cages with different heights, the end parts of the main steel bars of the steel reinforcement cages can be flush; in addition, in order to reduce the error that the reinforcing bar produced in the welding process to reduce the error of load case test data, through setting up laser emitter in upper cover plate center department, and the axle center direction irradiation towards the steel reinforcement cage. A plane plate is vertically arranged at the other end of the reinforcement cage, and the main reinforcement of the reinforcement cage is judged to be perpendicular to the upper cover plate of the load box by judging the position of the laser point on the axis of the reinforcement cage. The steel reinforcement cage main muscle quantity is comparatively more, and highly inconsistent main muscle welded time can be longer, can cause certain damage to the load case surface, can lead to oil leak or leak thick liquid, connects the steel reinforcement cage main muscle through the spacer bar, protection load case structure.
Preferably, the positioning steel bar is an L-shaped steel bar. The contact area of L type muscle bottom and upper cover plate is bigger, increases upper cover plate and steel reinforcement cage owner muscle joint strength, and the power dispersion is more even when carrying out the load test simultaneously, and the effect of test is better.
As an improvement, the connection length of the horizontal part of the positioning steel bar and the upper cover plate is smaller than the annular width of the box body.
As an improvement, the length of the vertical part of the positioning steel bar is larger than the maximum value of the difference value of the length of the main steel bar of the steel reinforcement cage.
Preferably, the center of the upper cover plate is provided with a cross, the cross is fixedly connected with the upper cover plate, the center of the cross is provided with a groove, and the laser transmitter is positioned in the groove. The cross groove is convenient for positioning and installing the laser transmitter.
Preferably, the upper cover plate is provided with a guide hole, the guide hole is used for installing a guide rib, and the guide rib is connected with the main rib of the reinforcement cage. The guide rib is used for guiding the concrete conduit to carry out secondary hole cleaning and pouring through the central hole of the load box, and plays a reinforcing role at the same time.
Preferably, the included angle between the guide rib and the box body is larger than 60 degrees.
Preferably, the oil pipe connector, the displacement rod connector, the sounding pipe connector and the grouting connector are embedded in the box body.
Preferably, the upper displacement rod connector and the lower displacement rod connector are symmetrically embedded in the box body.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.
Fig. 2 is a front partial schematic view of an embodiment of the present utility model.
Fig. 3 is a schematic bottom view of an embodiment of the present utility model.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: the device comprises a flow guiding unit 1, a flow guiding groove 11, a pressure unit 2, an upper cover plate 3, a sound tube joint 4, a lower displacement rod joint 5, an upper displacement rod joint 6, an oil tube joint 7, a hanging ring 8 and a positioning steel bar 9.
The basic structure of the embodiment is shown in figures 1, 2 and 3, and the embodiment provides a load box which comprises a box body and stirrups, wherein the stirrups are positioned at the bottom of the load box and are fixedly connected with the box body; the box body is annular, the top of the box body is provided with the upper cover plate 3, the upper cover plate 3 is provided with the positioning steel bars 9, the positioning steel bars 9 are fixedly connected with the upper cover plate 3, the steel bars of the steel bar cage are conveniently positioned and installed through the positioning steel bars 9, meanwhile, the steel bars of the steel bar cage are not easy to incline in the welding process, and the error of the test data of the load box is reduced; the positioning steel bar 9 has a certain length and good tolerance, and can be connected with the main steel bars of the steel bar cages with different heights so that the end parts of the main steel bars of the steel bar cages can be flush; the steel reinforcement cage main muscle quantity is comparatively more, and highly inconsistent main muscle welded time can be longer, can cause certain damage to the load case surface, can lead to oil leak or leak thick liquid, connects the steel reinforcement cage main muscle through the spacer bar 9, protection load case structure. The positioning steel bars 9 are uniformly distributed on the upper cover plate 3. The positioning steel bars 9 are annularly and uniformly distributed on the upper cover plate 3, and the positioning steel bars 9 are fixed on the upper cover plate 3 in a welding mode.
The positioning steel bar 9 is an L-shaped steel bar. The contact area of L type muscle bottom and upper cover plate 3 is bigger, increases upper cover plate 3 and steel reinforcement cage owner muscle joint strength, and the power dispersion is more even when carrying out the load test simultaneously, and the effect of test is better. The connecting length of the horizontal part of the positioning steel bar 9 and the upper cover plate 3 is smaller than the annular width of the box body. The length of the vertical part of the positioning steel bar 9 is larger than the maximum value of the difference value of the length of the main steel bar of the steel bar cage. The specification of the L-shaped rib is consistent with that of the main rib of the steel reinforcement cage, the length of the welded part of the L-shaped rib and the load box is 5cm less than the annular width of the load box in the embodiment, and the joint part of the L-shaped rib and the main rib of the steel reinforcement cage is ensured to be welded with the main rib in a superposition manner by 20 cm. The steel reinforcement cage and the load box must be ensured to be vertical during welding, and the eccentricity is controlled within 1 degree.
The upper cover plate 3 is provided with a guide hole, the guide hole is used for installing a guide rib, and the guide rib is connected with a main rib of the reinforcement cage. The guide rib is used for guiding the concrete conduit to carry out secondary hole cleaning and pouring through the central hole of the load box, and plays a reinforcing role at the same time. The included angle between the guide rib and the box body is larger than 60 degrees.
Still include laser emitter, laser emitter is located upper cover plate 3 center department, and laser emitter is connected with upper cover plate 3. After welding a main reinforcement of the steel reinforcement cage, a plane plate is placed at the center of the other end of the steel reinforcement cage, a circle with the same diameter as the steel reinforcement cage is drawn on the plane plate in a preferable mode, the circle center position is marked, the circle center position is conveniently placed on the axis of the steel reinforcement cage, a laser emitter is turned on, and the main reinforcement of the steel reinforcement cage is judged to be perpendicular to a load box according to whether laser generated by the laser emitter is located at the center of the plane plate. The center of the upper cover plate 3 is provided with a cross, the cross is fixedly connected with the upper cover plate 3, the center of the cross is provided with a groove, and the laser transmitter is positioned in the groove. The cross groove is convenient for positioning and installing the laser transmitter.
The oil pipe joint 7, the displacement rod joint, the sound tube joint 4 and the grouting joint are pre-buried in the box body. The displacement rod connector comprises an upper displacement rod connector 6 and a lower displacement rod connector 5, and the upper displacement rod connector 6 and the lower displacement rod connector 5 are symmetrically embedded in the box body.
The box includes water conservancy diversion unit 1 and pressure unit 2, pressure unit 2 is located the top of water conservancy diversion unit 1, upper cover plate 3 is located the top of pressure unit 2, water conservancy diversion unit 1 bottom is equipped with the outside guiding gutter 11 of opening, guiding gutter 11 is the ring shape specifically, the guiding gutter 11 groove is used for loading concrete, after the whole structure of load case is accomplished to the preparation, will be upwards with annular load case water conservancy diversion body, place on level ground, pour into guiding gutter 11 with the concrete in, then fully tamp with the vibrating rod, concrete strength is not less than pile body concrete strength, should adopt commodity concrete, the pouring is accomplished within 10 hours, must not remove the load case. The pressure unit 2 comprises a hydraulic cylinder and an annular shell, the annular shell is fixedly connected with the flow guiding unit 1, pistons are arranged at two ends of the hydraulic cylinder, and the pistons at two ends are fixedly connected with the upper cover plate 3 and the flow guiding unit 1 through piston rods respectively. The lower displacement rod connector 5 is fixedly connected with the flow guiding unit 1 and penetrates out of the cover plate, the upper displacement rod connector 6 is fixedly connected with the cover plate and penetrates out of the cover plate, the sound detection tube connector and the grouting connector are arranged on the upper cover plate 3, the grouting connector is used for grouting the pressure unit 2, when the static load test of the load box is completed, the load box and the reinforcement cage can be used as engineering piles in grouting, and the grouting connector is arranged to conveniently fill the load box with materials to form piles.
The upper displacement rod connector and the lower displacement rod connector are connected with a displacement tube, and the displacement tube is provided with: the mode of the displacement rod and the displacement protection tube is included, the outer diameter of the displacement rod is more than or equal to 16mm, the wall thickness is more than or equal to 1.5mm, the outer diameter of the displacement protection tube is more than or equal to 25mm, and the wall thickness is more than or equal to 2.0mm. According to the design length of the hole depth, the steel bar cage is connected to the ground along the steel bar cage, screw threads are adopted for connection, a raw material belt is required to be wound when the steel bar cage is screwed, and the compressive strength after connection is completed is more than or equal to 2MPa. Is arranged at 90 degrees and is respectively used for measuring the up-down displacement of the pile body;
the oil pipe joint 7 is connected with an oil pipe, is coiled at the load box in advance, is continuously unfolded when a reinforcement cage is to be placed, and is bound to the ground along the guide rib. The oil pipe is a high-pressure hose, and joints at two ends of the oil pipe are 24-degree cones M14x1.5. The connecting oil pipe is needed to be carried out after the load box and the reinforcement cage are welded for at least half an hour, so that the sealing ring in the oil pipe joint 7 is prevented from being scalded at high temperature during welding. The oil pipe joint 7 cannot be forced too hard when being screwed down, and the torque should be controlled between 25 and 35Nm.
The upper cover plate 3 is symmetrically provided with hanging rings 8, and the upper cover plate 3 and the hanging rings 8 are welded together.
After the connection of the load box and the reinforcement cage is completed, the reinforcement cage with the load box is lifted, the load box is prevented from being bent when the reinforcement cage with the load box is lifted, and the load box is connected with the lifting ring 8 by two lifting hooks; the load box and the steel reinforcement cage are placed in a pile foundation, and in the cage placing process, a displacement pipeline and an oil pipe are required to be bound, the displacement pipeline is bound by binding wires every 0.5 meter, and the oil pipe is bound by the binding wires every 1 meter. When the displacement cable is adopted, 4 main ribs are additionally arranged on the outer side of the reinforcement cage and used for guiding the displacement cable to be always bound to the ground so as to ensure the perpendicularity and effective protection of the displacement cable. When the pile top elevation is lower than the ground, a simple steel reinforcement cage (8 main reinforcements, one reinforcing hoop every 3 meters) is required to be placed on the ground from the pile top to guide and protect the pipeline. After the installation is completed, oil is filled into the hydraulic pressure, the hydraulic cylinder generates forces in the upper direction and the lower direction, and the forces are transmitted to external equipment through the upper displacement rod and the lower displacement rod.
According to the scheme, the L-shaped positioning steel bars 9 are arranged to conveniently position the steel bars for installing the steel bar cage, meanwhile, the steel bars of the steel bar cage are not easy to incline in the welding process, and the error of the load box test data is reduced; the contact area between the bottom of the L-shaped rib and the upper cover plate 3 is larger, the connection strength between the upper cover plate 3 and the main rib of the reinforcement cage is increased, meanwhile, the force dispersion is more uniform when the load test is carried out, and the test effect is better; the positioning steel bar 9 has a certain length and good tolerance, and can be connected with the main steel bars of the steel bar cages with different heights so that the end parts of the main steel bars of the steel bar cages can be flush; the number of the main reinforcements of the reinforcement cage is relatively large, the welding time of the main reinforcements with inconsistent heights is relatively long, certain damage can be caused to the surface of the load box, oil leakage or slurry leakage can be caused, the main reinforcements of the reinforcement cage are connected through the positioning reinforcements 9, and the structure of the load box is protected; and judging whether the main reinforcement of the reinforcement cage is vertical to the load box according to whether laser generated by the laser transmitter is at the center of the plane plate, so that the reinforcement cage is convenient and simple.
The foregoing is merely exemplary of the present utility model, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present utility model, and in the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "fixed," etc. are to be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (9)
1. The load box is characterized by comprising a box body, stirrups and a laser emitter, wherein the stirrups are positioned at the bottom of the load box and are fixedly connected with the box body; the box is annular, the box top is equipped with the upper cover plate, be equipped with the spacer bar on the upper cover plate, spacer bar and upper cover plate fixed connection, spacer bar evenly distributed is on the upper cover plate, laser emitter is located upper cover plate center department, and its irradiation direction is perpendicular to upper cover plate.
2. A load box according to claim 1, wherein: the positioning steel bar is an L-shaped steel bar.
3. The load box of claim 1, wherein the length of the connection of the horizontal portion of the spacer bar to the upper deck is less than the annular width of the box body.
4. A load box according to claim 1, wherein the length of the vertical portion of the spacer bar is greater than the maximum difference in length of the cage bars.
5. The load box of claim 1, wherein the top cover plate is provided with a cross at the center, the cross is fixedly connected with the top cover plate, a groove is formed in the center of the cross, and the laser transmitter is located in the groove.
6. A load box according to claim 1, wherein: the upper cover plate is provided with a guide hole, the guide hole is used for installing a guide rib, and the guide rib is connected with a main rib of the reinforcement cage.
7. A load box as claimed in claim 6, wherein: the included angle between the guide rib and the box body is larger than 60 degrees.
8. A load box according to claim 1, wherein: the oil pipe connector, the upper displacement rod connector, the lower displacement rod connector and the sounding pipe connector are embedded in the box body.
9. A load box as claimed in claim 8, wherein: the upper displacement rod connector and the lower displacement rod connector are symmetrically embedded in the box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320804014.3U CN219430846U (en) | 2023-04-12 | 2023-04-12 | Load box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320804014.3U CN219430846U (en) | 2023-04-12 | 2023-04-12 | Load box |
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| Publication Number | Publication Date |
|---|---|
| CN219430846U true CN219430846U (en) | 2023-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320804014.3U Active CN219430846U (en) | 2023-04-12 | 2023-04-12 | Load box |
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| CN (1) | CN219430846U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117127666A (en) * | 2023-10-27 | 2023-11-28 | 山西机械化建设集团有限公司 | Foundation pile negative friction resistance blocking type test element and mounting method |
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2023
- 2023-04-12 CN CN202320804014.3U patent/CN219430846U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117127666A (en) * | 2023-10-27 | 2023-11-28 | 山西机械化建设集团有限公司 | Foundation pile negative friction resistance blocking type test element and mounting method |
| CN117127666B (en) * | 2023-10-27 | 2024-01-26 | 山西机械化建设集团有限公司 | Foundation pile negative friction resistance blocking type test element and mounting method |
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