A steel-concrete composite pier for detecting uplift bearing capacity of an anchor rod and a construction method thereof

Abstract

The present application relates to the field of geotechnical anchoring engineering, and particularly relates to a steel-concrete combined pier for detecting uplift bearing capacity of anchor rod and a construction method thereof, the steel-concrete combined pier for detecting uplift bearing capacity of anchor rod comprises a concrete base and two profile steel beams fixed on the concrete base, a plurality of steel bars, stirrups and shear reinforcement are arranged in the concrete base, the stirrups and the shear reinforcement are arranged perpendicularly to the length direction of the concrete base, the steel bars are fixed on the inner side of the stirrups, and the extension direction of the steel bars is parallel to the length direction of the concrete base, and a rib plate is welded on the outer side of the two profile steel beams and between the two profile steel beams. Compared with the traditional pure concrete cushion pier, the combined pier provided by the present application is lighter in weight, is more beneficial to hoisting of the cushion pier, is more convenient to construct, and can ensure that the concrete base is not cracked or damaged under the pressure load of the profile steel beams.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of geotechnical anchoring engineering, in particular to a steel-concrete composite pier for detecting the uplift bearing capacity of an anchor rod and a construction method thereof. BACKGROUND

[0002] Vertical anchor rods, especially anti-floating anchor rods, are widely used in the field of geotechnical anchoring engineering. Therefore, the detection of the uplift bearing capacity of the anti-floating anchor rod is an important link for evaluating the construction quality of the anchor rod and whether it is qualified. Since the anti-floating anchor rod is generally constructed after the soil excavation reaches the foundation bottom elevation, the required equipment for detection is affected by the site and hoisting environment, and the construction is difficult. The traditional beam detection method needs to use a cushion pier to erect a detection steel beam. There is a large gap between the cushion pier and the anchor rod to be detected, and the detection result is relatively reliable. However, the cushion pier is mostly poured with pure concrete, which is heavy and difficult to hoist, and is prone to cracking under high pressure load. Therefore, optimizing the beam detection device, especially improving the cushion pier, can help improve the detection efficiency of the beam detection method and ensure the reliability of the detection result.

[0003] Based on this, in order to promote the application of the beam detection method and make the beam detection method more convenient, the present application provides a steel-concrete composite pier for detecting the uplift bearing capacity of an anchor rod. SUMMARY

[0004] To solve the defects of the cushion pier of the beam detection method, the present application provides a steel-concrete composite pier for detecting the uplift bearing capacity of an anchor rod, which comprises a concrete base and two steel beams fixed on the concrete base. The concrete base is provided with a plurality of steel bars, stirrups and shear reinforcement. The stirrups and shear reinforcement are arranged perpendicular to the length direction of the concrete base. The steel bars are fixed inside the stirrups, and the extension direction of the steel bars is parallel to the length direction of the concrete base. The outer sides of the two steel beams and the space between the two steel beams are welded with a rib plate.

[0005] Further, the depth of the steel beam embedded in the concrete base is 0.3-0.5 times the height of the steel beam.

[0006] Further, the steel bars are arranged at the upper and lower parts of the concrete base. By arranging the steel bars in the concrete base, the tensile strength and overall stiffness of the composite pier are improved.

[0007] Further, the length of the steel beam is 0.4-0.8m shorter than the length of the concrete base.

[0008] Further, the stirrups include first stirrups and second stirrups, the first stirrups are respectively arranged between the two ends of the steel beam and the two ends of the concrete base, the second stirrups are arranged in the concrete base at equal intervals, and the second stirrups include first outer stirrups welded on the outer sides of the steel beams and inner stirrups between the two steel beams. The steel bars are constrained in the concrete base by the combination of the first stirrups and the second stirrups, and the integrity is improved.

[0009] Further, the shear bars are arranged in the concrete base at equal intervals, and the shear bars include second outer stirrups welded on the outer sides of the two steel beams, and each of the second outer stirrups is connected with an upwardly inclined bent-up bar, and the two bent-up bars are located between the two steel beams and staggered with each other.

[0010] Further, the rib plates include edge rib plates and middle rib plates, the edge rib plates are welded on the outer sides of the steel beams, the middle rib plates are welded between the two steel beams, and the edge rib plates and the middle rib plates are on the same vertical plane.

[0011] Further, the concrete base is further provided with steel bar stools, and the steel bar stools are welded at equal intervals at the bottom of the two steel beams. The steel bar stools can support the steel beams when the steel beams are installed, form a certain interval with the bottom of the composite pier, and better transmit force.

[0012] The application also provides a construction method of the steel-concrete composite pier for detecting the uplift bearing capacity of an anchor rod.

[0013] S1, the steel beam is inverted, the interval between the two steel beams is adjusted, the second stirrups and the shear bars are welded on the steel beams at a designed interval, and then the rib plates are welded on the steel beams at a designed interval; it can be understood that when the composite pier includes the steel bar stools, the steel bar stools also need to be welded on the steel beams;

[0014] S2, a bottom mold plate is laid, the welded steel beams are turned right side up and placed on the bottom mold plate, the steel bars are inserted into the second stirrups and the shear bars and bound, and the first stirrups are inserted into the steel bars at the designed positions and bound;

[0015] S3, side mold plates of the concrete base are installed, concrete is poured, and the steel-concrete composite pier for detecting the uplift bearing capacity of an anchor rod is obtained after drying.

[0016] Compared with the prior art, the technical scheme provided by the application has the following advantages:

[0017] (1) The application adopts the steel beam and the concrete base to form a composite cushion pier, compared with the traditional pure concrete cushion pier, the quality is lighter, the hoisting of the cushion pier is more beneficial, and the construction is more convenient.

[0018] (2) The steel beam used in this invention is embedded in the concrete base, and the steel beam and the concrete base are connected into one piece by ribs and stirrups, thereby enhancing the stability and rigidity of the steel beam and enabling it to support a larger test load.

[0019] (3) The concrete base of the present invention is provided with shear reinforcement. The shear reinforcement is symmetrically arranged, which can enhance the shear and punching shear bearing capacity of the concrete base and ensure that the concrete base does not crack or break under the pressure load of the steel beam. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 The top view of the steel-concrete composite pier for detecting the pull-out bearing capacity of anchor bolts provided in the embodiment of the present invention is shown, in which stirrups, shear bars, ribs and steel reinforcement bars are hidden;

[0022] Figure 2 The top view of a steel-concrete composite pier for detecting the pull-out bearing capacity of anchor bolts is provided in an embodiment of the present invention, in which the reinforcing bars and ribs are hidden;

[0023] Figure 3 The top view of the steel-concrete composite pier for detecting the pull-out bearing capacity of anchor bolts provided in the embodiment of the present invention is shown, in which the reinforcing bars, stirrups, shear bars and reinforcing bars are hidden;

[0024] Figure 4 for Figure 2 Sectional view along axis AA;

[0025] Figure 5 for Figure 2 BB-direction sectional view;

[0026] Figure 6 for Figure 2 CC-direction sectional view;

[0027] Figure 7 for Figure 2 DD section view;

[0028] Figure 8 for Figure 2 EE-directed sectional view;

[0029] Figure 9 This is a schematic diagram of the steel bar stool structure provided in an embodiment of the present invention;

[0030] Figure 10 F-F is a cross-sectional view of Figure 3

[0031] Reference signs:

[0032] 100, concrete base;

[0033] 110, steel bar;

[0034] 120, shear bar; 121, second outer stirrup; 122, bent-up bar;

[0035] 130, first stirrup;

[0036] 140, second stirrup; 141, first outer stirrup; 142, inner stirrup;

[0037] 150, steel stool; 151, bar seat; 152, bar waist; 153, bar claw;

[0038] 200, steel beam; 210, upper flange; 220, lower flange; 230, web; 240, edge rib plate; 250, middle rib plate. DETAILED DESCRIPTION

[0039] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0040] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms “center”, “longitudinal”, “transverse”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms “first” and “second” are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0041] Figure 1 and Figure 2 ​As shown in the figure, a steel-concrete composite pier for detecting the uplift bearing capacity of an anchor rod comprises a concrete base 100 and two profile steel beams 200 fixed on the concrete base 100. The concrete base 100 is provided with a plurality of steel bars 110, stirrups and shear reinforcement 120. The stirrups and shear reinforcement 120 are arranged perpendicular to the length direction of the concrete base 100. The steel bars 110 are fixed inside the stirrups and extend parallel to the length direction of the concrete base 100. Figure 3 As shown in the figure, the outer sides of the two profile steel beams 200 and the space between the two profile steel beams 200 are welded with a rib plate. It should be noted that the outer side of the profile steel beam 200 refers to the side of any profile steel beam 200 away from the adjacent profile steel beam 200.

[0042] Specifically, Figure 4 As shown in the figure, the profile steel beam 200 comprises an upper flange 210 and a lower flange 220 arranged in parallel, and a web 230 connected vertically between the upper flange 210 and the lower flange 220. The depth of the profile steel beam 200 embedded in the concrete base 100 is 0.3-0.5 times the height of the profile steel beam 200, that is, the lower flange 220 and the lower part of the web 230 of the profile steel beam 200 are located in the concrete base 100.

[0043] The length of the profile steel beam 200 is 0.4-0.8 m shorter than the length of the concrete base 100, that is, there is a certain distance between the two ends of the profile steel beam 200 and the two ends of the concrete base 100.

[0044] Figure 5 As shown in the figure, the steel bars 110 are arranged at the upper and lower parts of the concrete base 100. In this embodiment, the upper part of the concrete base 100 is provided with 7 steel bars 110, and the 7 steel bars 110 are located on the same horizontal plane. The lower part of the concrete base 100 is provided with 9 steel bars 110, and the 9 steel bars 110 are located on the same horizontal plane. Of course, the number and position of the steel bars 110 are not limited to this and can be adjusted arbitrarily.

[0045] The stirrups comprise first stirrups 130 and second stirrups 140. The first stirrups 130 are provided with two, which are respectively located between the two ends of the profile steel beam 200 and the two ends of the concrete base 100. The second stirrups 140 are provided with a plurality of, which are equally spaced in the concrete base 100. Figure 6 As shown in the figure, the second stirrups 140 comprise first outer stirrups 141 welded on the outer sides of the profile steel beams 200 and inner stirrups 142 welded between the two profile steel beams 200. Specifically, the first outer stirrups 141 are welded on the webs 230 of the outer sides of the profile steel beams 200, and the two ends of the inner stirrups 142 are welded with the webs 230 of the two profile steel beams 200 respectively.

[0046] The shear reinforcement 120 is provided with a plurality of, which are equally spaced in the concrete base 100, Figure 7As shown, the shear reinforcement 120 comprises the second outer stirrup 121 welded on the outer side of the two steel beams 200, and each second outer stirrup 121 is connected with the upwardly inclined bent-up bar 122, and the two bent-up bars 122 are located between the two steel beams 200 and staggered with each other.

[0047] Figure 8 As shown, the concrete base 100 is further provided with the reinforcement stool 150, and the reinforcement stool 150 is welded at the bottom of the two steel beams 200 at equal intervals. Figure 9 As shown, the reinforcement stool 150 comprises the stirrup seat 151 and the stirrup waist 152 arranged on both sides of the stirrup seat 151, and the stirrup claw 153 parallel to the stirrup seat 151 is connected at the bottom of the stirrup waist 152, the stirrup seat 151 is welded with the bottom of the lower flange 220 of the steel beam 200, and the stirrup claw 153 is flush with the bottom surface of the concrete base 100.

[0048] Figure 10 As shown, the rib plate comprises the edge rib plate 240 and the middle rib plate 250, the edge rib plate 240 is welded on the outer side of the steel beam 200, and the middle rib plate 250 is welded between the two steel beams 200, and the edge rib plate 240 and the middle rib plate 250 are on the same vertical plane. The edge rib plate 240 and the middle rib plate 250 on the same vertical plane are taken as a group of rib plates, and in the embodiment, two groups of rib plates are arranged on the steel beam 200, and of course, more than two groups of rib plates can be arranged in other embodiments.

[0049] The application further provides a construction method of the steel-concrete composite pier for detecting the uplift bearing capacity of the anchor rod.

[0050] S1, the steel beam 200 is inverted, and the interval between the two steel beams 200 is adjusted, the second stirrup 140, the shear reinforcement 120 and the reinforcement stool 150 are welded on the steel beam 200 at the designed interval, and then the rib plate is welded on the steel beam 200 at the designed interval;

[0051] S2, the bottom mold plate is paved, the welded steel beam 200 is turned right side up and placed on the bottom mold plate, the steel bar 110 is inserted into the second stirrup 140 and the shear reinforcement 120 and bound, and the first stirrup 130 is inserted into the both ends of the steel bar 110 to the designed position and bound;

[0052] S3, the side mold plate of the concrete base 100 is installed, the concrete is poured, and the steel-concrete composite pier for detecting the uplift bearing capacity of the anchor rod is obtained after drying.

[0053] In use, the steel-concrete composite piers are symmetrically arranged at both sides of the anchor rod to be detected according to the designed interval, two parallel steel beams are vertically placed on the steel-concrete composite piers with the anchor rod to be detected as the center, and then the steel pad plate with a center opening, the center-piercing jack, the anchor pad plate and the anchor device are sequentially sleeved to the anchor rod to be detected to complete the installation of the detection loading device.

[0054] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A steel-concrete composite pier for testing the pull-out bearing capacity of anchor bolts, characterized in that: It includes a concrete base and two steel beams fixed on the concrete base. The concrete base is provided with multiple steel bars, stirrups and shear bars. The stirrups and shear bars are arranged perpendicular to the length direction of the concrete base. The steel bars are fixed inside the stirrups and extend parallel to the length direction of the concrete base. Ribs are welded to the outer sides of the two steel beams and between the two steel beams.

2. The steel-concrete composite pier for testing the pull-out bearing capacity of anchor bolts according to claim 1, characterized in that: The depth to which the steel beam is embedded in the concrete base is 0.3-0.5 times the height of the steel beam.

3. The steel-concrete composite pier for testing the pull-out bearing capacity of anchor bolts according to claim 1, characterized in that: The reinforcing bars are installed at the upper and lower parts of the concrete base.

4. The steel-concrete composite pier for testing the pull-out bearing capacity of anchor bolts according to claim 1, characterized in that: The length of the steel beam is 0.4-0.8m shorter than the length of the concrete base.

5. The steel-concrete composite pier for testing the pull-out bearing capacity of anchor bolts according to claim 4, characterized in that: The stirrups include a first stirrup and a second stirrup. The first stirrup is respectively located between the two ends of the steel beam and the two ends of the concrete base. The second stirrup is equally spaced within the concrete base and includes a first outer stirrup welded to the outside of the steel beam and an inner stirrup between the two steel beams.

6. The steel-concrete composite pier for testing the pull-out bearing capacity of anchor bolts according to claim 1, characterized in that: The shear reinforcement bars are evenly spaced within the concrete base, including second outer stirrups welded to the outer sides of the two steel beams. Each second outer stirrup is connected to an upwardly inclined bent-up bar on its inner side, and the two bent-up bars are located between the two steel beams and staggered from each other.

7. The steel-concrete composite pier for testing the pull-out bearing capacity of anchor bolts according to claim 1, characterized in that: The rib plate includes a side rib plate and a middle rib plate. The side rib plate is welded to the outside of the steel beam, and the middle rib plate is welded between the two steel beams. The side rib plate and the middle rib plate are on the same vertical plane.

8. The steel-concrete composite pier for testing the pull-out bearing capacity of anchor bolts according to claim 1, characterized in that: The concrete base is also equipped with steel bar stools, which are welded at equal intervals to the bottom of the two steel beams.

9. A construction method for a steel-concrete composite pier for testing the pull-out bearing capacity of anchor bolts as described in any one of claims 1-8, characterized in that, The construction steps are as follows: S1. Invert the steel beam and adjust the spacing between the two steel beams. First, weld the second stirrup, shear reinforcement and steel reinforcement bar to the steel beam at the designed spacing. Then, weld the rib plate to the steel beam at the designed spacing. S2. Lay the bottom formwork, turn the welded steel beam right side up, place it on the bottom formwork, insert the steel bars into the second stirrup and the shear reinforcement and tie them, insert the first stirrup into the two ends of the steel bars to the design position and tie them; S3. Install the side formwork of the concrete base, pour concrete, and after drying, obtain the steel-concrete composite pier used for testing the pull-out bearing capacity of the anchor rods.

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