Anchor sealing template for circumferential prestress tension notch of prestressed concrete cable bent tower

Abstract

The utility model belongs to the technical field of bridge construction, and particularly relates to an anchor sealing template for a circumferential prestress tension notch of a prestressed concrete cable bent tower. Comprising an anchor sealing steel formwork, the anchor sealing steel formwork is mounted at a notch of an anchor groove, a plurality of formwork mounting holes are formed in the anchor sealing steel formwork, and the formwork mounting holes are fixed to anchor sealing steel bars in the notch; the template back edge is welded on the back of the anchor sealing steel template; the anchor sealing concrete discharging notch is formed in the top of the anchor sealing steel formwork, and the anchor sealing concrete discharging notch is communicated with the outside and the inside of the anchor groove. The anchor sealing device solves the problems existing in a conventional anchor sealing concrete construction method of a circumferential prestress tension notch.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bridge construction technical field, concretely relates to a kind of prestressed concrete cable tower annular prestress tensioning slot mouth seal anchor formwork. BACKGROUND

[0002] The similar prestressed concrete cable tower annular prestress tensioning slot mouth seal anchor construction method of prior art is as follows: ①after prestressed construction, install seal anchor reinforcement net in tensioning slot mouth, utilize existing bamboo plywood and square timber in site, bamboo plywood is used as panel, square timber is used as back ridge to make seal anchor wood formwork.When formwork is installed, the top of formwork is slightly lower than the top of tensioning slot mouth by about 5 centimeters, as the pouring opening of seal anchor concrete.The seal anchor concrete is poured into anchor groove from the gap reserved on the top of formwork, and the concrete is made dense by using hand hammer to knock the formwork.After seal anchor concrete reaches the strength that formwork can be removed, loosen formwork anchor and remove seal anchor wood formwork, and use trowel to fill the gap in the top of seal anchor that is not poured dense in the first time.Continue to wait for the concrete to solidify, and then polish seal anchor concrete with angle grinder to make it flat with the surface of cable tower, and the seal anchor is completed.②when prestressed concrete cable tower is constructed, a plastic pipe with a diameter of about 100mm is reserved on the top of tensioning slot mouth as the discharging hole for seal anchor concrete, and after prestressed construction, formwork is made by using existing bamboo plywood and square timber in site, and is fixed on the outside of seal anchor slot mouth by iron wire, and seal anchor concrete is poured into seal anchor slot mouth from the discharging pipe, and the formwork is knocked to seal anchor.When seal anchor concrete reaches the strength that formwork can be removed, remove the formwork, and then polish the surface of seal anchor concrete to be flat.This commonly used seal anchor construction method is widely used, and can adapt to different seal anchor scenes, but also has many disadvantages ①the quality and flatness of formwork assembled by bamboo plywood and square timber on site are poor, and the appearance quality of seal anchor concrete is seriously affected, and can only be improved by polishing in later period.②although it seems that waste bamboo plywood and square timber in site is utilized, but the seal anchor wood formwork is basically disposable, and the cost of labor is high for a large number of wood formwork.③the discharging guide pipe for seal anchor concrete is reserved in cable tower, and the pipe is difficult to install due to dense steel bars in cable tower, and the pipe is easily crushed, damaged or displaced during cable tower concrete construction, which leads to difficulty in seal anchor discharging in later period.④it seems that it is convenient and simple to seal anchor by using low formwork, but the small amount of seal anchor concrete is divided into two times of construction, the integrity is poor, and the density of seal anchor concrete in the second time cannot be guaranteed. SUMMARY

[0003] The present application provides a kind of prestressed concrete cable tower annular prestress tensioning slot mouth seal anchor formwork to solve the problems existing in conventional annular prestress tensioning slot mouth seal anchor concrete construction method.

[0004] The present application adopts the following technical solutions: a kind of prestressed concrete cable tower annular prestress tensioning slot mouth seal anchor formwork, comprising:

[0005] Anchorage sealing steel form plate is installed at the slot mouth of the anchor slot, a plurality of form plate mounting holes are arranged on the anchorage sealing steel form plate, and the anchorage sealing steel form plate is fixed by the anchor and the reserved steel bar of the slot mouth of the anchor slot;

[0006] A form plate back rib is welded at the back of the anchorage sealing steel form plate;

[0007] An anchorage sealing concrete feeding slot mouth is installed at the top of the anchorage sealing steel form plate, and the anchorage sealing concrete feeding slot mouth is connected with the outside and the anchor slot.

[0008] In some embodiments, the anchorage sealing steel form plate is a rectangular structure, the width a of the anchorage sealing steel form plate is greater than 6-12 mm of the diameter of the anchor slot, and the length of the anchorage sealing steel form plate is a+the elevation of the highest point of the anchorage sealing concrete feeding slot mouth-the elevation of the highest point of the anchor slot.

[0009] In some embodiments, the form plate back rib comprises:

[0010] Vertical back ribs are arranged in two groups, and the two groups of vertical back ribs are welded on the left and right sides of the anchorage sealing steel form plate;

[0011] Horizontal back ribs are arranged in three groups, the uppermost horizontal back rib is arranged at the bottom of the anchorage sealing concrete feeding slot mouth and is welded and fixed with the anchorage sealing steel form plate, the lowermost horizontal back rib is welded at the bottom of the anchorage sealing steel form plate, and the middle horizontal back rib is arranged between the upper and lower horizontal back ribs and is welded and fixed with the anchorage sealing steel form plate.

[0012] In some embodiments, the form plate back rib adopts a 25 mm square tube and is intermittently welded with the anchorage sealing steel form plate.

[0013] In some embodiments, the form plate mounting holes are arranged in four groups, two of which are arranged above the middle horizontal back rib, and the other two are arranged below the middle horizontal back rib.

[0014] In some embodiments, the anchorage sealing concrete feeding slot mouth comprises:

[0015] The feeding port is rectangular;

[0016] The discharging port is wedge-shaped and is arranged at the upper part of the anchorage sealing steel form plate;

[0017] An opening with a size same as that of the discharging port is arranged on the anchorage sealing steel form plate.

[0018] Compared with the prior art, the anchorage sealing concrete construction form plate can guarantee construction quality, is simple and convenient to operate, has low overall cost, and can be recycled. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 This is a front view of the present utility model;

[0020] Figure 2 for Figure 1 Side view;

[0021] Figure 3 for Figure 1 Top view;

[0022] In the diagram, 1-Sealing steel formwork, 2-Sealing concrete discharge trough, 2.1-Inlet, 2.2-Outlet, 3-Formwork back rib, 3.1-Vertical back rib, 3.2-Horizontal back rib, 4-Anchor groove, 5-Formwork installation hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] like Figures 1-3 The above describes a sealing template for the circumferential prestressing tensioning slot of a prestressed concrete cable tower, comprising:

[0025] Anchoring steel template 1 is installed at the opening of the anchor groove 4. Multiple template installation holes 5 are provided on the anchoring steel template 1. The anchoring steel template 1 is fixed to the steel bars reserved in the opening of the anchor groove 4 by anchoring members.

[0026] Template back rib 3, which is welded to the back of the sealing anchor steel template 1;

[0027] An anchor concrete discharge slot 2 is installed on the top of the anchor steel formwork 1 and connects the outside to the inside of the anchor slot 4.

[0028] The anchoring steel formwork 1 is a rectangular structure. The width 'a' of the anchoring steel formwork 1 is 6-12mm greater than the diameter of the anchor groove 4. The length of the anchoring steel formwork 1 is 'a' + the elevation of the highest point of the anchoring concrete discharge trough 2 - the elevation of the highest point of the anchor groove 4.

[0029] Template back rib 3 includes:

[0030] Vertical back ribs 3.1, two sets of vertical back ribs 3.1 are provided, and the two sets of vertical back ribs 3.1 are welded to the left and right sides of the sealing anchor steel formwork 1;

[0031] The transverse back battens 3.2 are arranged in three groups, the uppermost transverse back batten 3.2 is arranged at the bottom of the anchorage concrete discharge notch 2 and is welded and fixed with the anchorage steel formwork 1; the lowermost transverse back batten 3.2 is welded at the bottom of the anchorage steel formwork 1; the middle transverse back batten 3.2 is arranged between the upper and lower transverse back battens 3.2 and is welded and fixed with the anchorage steel formwork 1.

[0032] The formwork back batten 3 is made of a 25mm square tube and is intermittently welded with the anchorage steel formwork 1.

[0033] The formwork mounting holes 5 are arranged in four, two of which are above the middle transverse back batten 3.2 and the other two are below the middle transverse back batten 3.2.

[0034] The anchorage concrete discharge notch 2 comprises:

[0035] The feeding port 2.1 is rectangular;

[0036] The discharging port 2.2 is arranged on the anchorage steel formwork 1;

[0037] A preformed opening with the same size as the discharging port 2.2 is arranged on the anchorage steel formwork 1.

[0038] The anchorage steel formwork 1 is made of a D=3mm steel plate and a 25mm square tube according to the design size and shape, and the formwork mounting holes 5 are reserved on the anchorage steel formwork 1, a 3mm diameter iron wire is passed through the formwork mounting holes 5 and fixed with the anchorage steel bars in the notch, and the anchorage concrete is poured for anchorage construction.

[0039] According to the prestressed tension notch of the cable tower, the anchorage steel formwork 1 slightly larger than the size of the tension notch by about 3cm is made, it is strictly forbidden that the size of the steel formwork should meet the design requirements, the overlarge formwork will cause the new and old concrete to have serious differential settlement due to the overwide lap joint surface of the formwork and the original concrete surface of the cable tower, and the too small anchorage formwork will be difficult to install and will easily cause gaps between the formwork and the notch, resulting in grout leakage during the anchorage concrete construction and causing the anchorage concrete to have a rough surface. The anchorage steel formwork 1 is required to be flat and cannot have distortion; the formwork back batten 3 is intermittently welded with the panel, the welding quality should meet the standards, and the welding should be avoided in the circulation construction process; the formwork mounting holes 5 with a diameter of 5mm are reserved at the middle transverse back batten 3.2 for the fixation between the formwork and the main structure; the anchorage concrete discharge notch 2 is reserved at the top of the anchorage steel formwork 1 to facilitate the pouring of the anchorage concrete.

[0040] After the completion of the circumferential prestressed tension of the cable tower, the anchorage steel mesh is installed, two 3mm diameter iron wires are wound on the anchorage steel bars and passed through the formwork mounting holes 5 on the anchorage steel formwork 1, the anchorage steel formwork 1 is buckled, and the anchoring iron wires are tightened on the outer transverse battens of the formwork to play a fixing role on the anchorage formwork.

[0041] Slowly pour the anchoring concrete from the discharge port at the top of the anchoring steel formwork 1, and use a hammer to lightly hit the back of the steel formwork while pouring the concrete, so that the concrete poured into the anchoring groove is in a dense state. During the pouring process, the pouring speed of the concrete should be controlled to avoid pouring too much at once, which makes it difficult to compact the concrete and affects the quality of the anchoring concrete.

[0042] After the concrete reaches the strength that allows the formwork to be removed, cut the tie wires outside the anchoring formwork and remove the anchoring formwork. Continue to cure the anchoring concrete, and when the strength reaches more than 50% of the design strength, use an angle grinder to polish the joint between the anchoring concrete and the main structure to a smooth surface, which completes the construction of the anchoring concrete of the prestressed tension groove.

[0043] Before the anchoring formwork is used again, use a steel brush to polish and clean the residual cement paste and other residues on the surface of the formwork, and apply release agent or other isolation materials to ensure the appearance quality of the anchoring concrete.

[0044] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; 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 to 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 prestressed concrete cable tower hoop prestress tensioning groove sealing and anchoring formwork, characterized in that, The utility model relates to a formwork for anchorage concrete, which comprises: an anchorage steel formwork (1) installed at the slot of an anchorage slot (4), a plurality of formwork mounting holes (5) provided on the anchorage steel formwork (1), and the anchorage steel formwork (1) fixed by the steel bars reserved at the slot of the anchorage slot (4) through anchoring members; a formwork back bar (3) welded at the back of the anchorage steel formwork (1); an anchorage concrete feeding slot (2) installed at the top of the anchorage steel formwork (1), and the anchorage concrete feeding slot (2) connected with the outside and the anchorage slot (4).

2. The prestressed concrete pylon hoop prestressing tensioning slot sealing and anchoring formwork according to claim 1, characterized in that, The anchorage steel formwork (1) is in a rectangular structure, the width a of the anchorage steel formwork (1) is greater than the diameter of the anchorage slot (4) by 6-12 mm, and the length of the anchorage steel formwork (1) is a+the elevation of the highest point of the anchorage concrete feeding slot (2)-the elevation of the highest point of the anchorage slot (4).

3. The prestressed concrete pylon hoop prestressing tensioning slot sealing and anchoring formwork according to claim 1, characterized in that, The formwork back bar (3) comprises: vertical back bars (3.1) provided in two groups, the two groups of vertical back bars (3.1) welded at the left and right sides of the anchorage steel formwork (1); horizontal back bars (3.2) provided in three groups, the uppermost horizontal back bar (3.2) provided at the bottom of the anchorage concrete feeding slot (2) and welded and fixed with the anchorage steel formwork (1), the lowermost horizontal back bar (3.2) welded at the bottom of the anchorage steel formwork (1), and the middle horizontal back bar (3.2) provided between the upper and lower horizontal back bars (3.2) and welded and fixed with the anchorage steel formwork (1).

4. The prestressed concrete pylon hoop prestressing tensioning slot seal and anchor formwork according to claim 3, characterized in that, The formwork back bar (3) is made of a 25 mm square tube and discontinuously welded with the anchorage steel formwork (1).

5. The prestressed concrete pylon hoop prestressing tensioning slot seal and anchor formwork according to claim 3, characterized in that, The formwork mounting holes (5) are provided in four, two of which are above the middle horizontal back bar (3.2) and the other two of which are below the middle horizontal back bar (3.2).

6. The prestressed concrete pylon hoop prestressing tensioning slot seal anchor formwork according to claim 1, characterized in that, The anchorage concrete feeding slot (2) comprises: a feeding port (2.1) in a rectangular shape; a discharging port (2.2) in a wedge shape, the discharging port (2.2) provided on the anchorage steel formwork (1); a pre-prepared opening with the same size as the discharging port (2.2) provided on the anchorage steel formwork (1).

Images