Circumferential prestressed anchorage installation process

Abstract

This application discloses a circumferential prestressed anchor installation process, belonging to the field of building engineering technology. In this process, each steel strand is a U-shaped steel strand. The first and second circumferential prestressed anchors are located on both sides of the load-bearing body of each steel strand. The strand segments at the anchorage end of the first steel strand and at the tensioning end of the second steel strand are respectively passed through the anchor holes of the first circumferential prestressed anchor. The strand segments at the tensioning end of the first steel strand and at the anchorage end of the second steel strand are respectively passed through the anchor holes of the second circumferential prestressed anchor. After each steel strand is passed through the holes, anchor plates and clamps are installed at the anchorage end and tensioning end respectively for fixing and clamping. This ensures that both sides of the load-bearing body of each steel strand bear the same amount of prestress during tensioning, guaranteeing the stability of the load-bearing body in its internal structure.

Description

Technical Field

[0001] This application relates to the field of building construction technology, and in particular to a circumferential prestressed anchor installation process. Background Technology

[0002] Generally, after the steel strands are threaded, circumferential prestressed anchors need to be installed. In the existing circumferential prestressed anchor installation process, a single circumferential prestressed anchor is used. The strand ends of the tensioning end or anchoring end of the steel strand are aligned and passed through the anchor hole of the same circumferential prestressed anchor to complete the installation. However, this method is prone to causing inconsistent prestress on both sides of the load-bearing body during the tensioning process, which leads to instability of the internal structure when the load-bearing body is too high, that is, it is easy to cause phenomena such as fracture.

[0003] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is prior art.

[0004] Application content

[0005] The main purpose of this application is to provide a circumferential prestressed anchor installation process, which aims to solve the technical problems of easy fracture and other phenomena in the prior art.

[0006] To achieve the above objectives, this application proposes a circumferential prestressed anchor installation process, which includes the following steps:

[0007] After each steel strand is threaded through, the strand section at the anchorage end of the first steel strand and the strand section at the tensioning end of the second steel strand are respectively passed through the anchor hole of the first circumferential prestressed anchor.

[0008] The strand of the first steel strand at the tensioning end and the strand of the second steel strand at the anchoring end are respectively passed through the anchor hole of the second circumferential prestressed anchor.

[0009] After each steel strand has been drilled, anchor plates and wedges are installed at the anchoring end and the tensioning end respectively to complete the installation of the circumferential prestressed anchor.

[0010] Each of the steel strands is a U-shaped steel strand, and the first circumferential prestressed anchor and the second circumferential prestressed anchor are located on both sides of the bearing body of each steel strand.

[0011] Optionally, the strand segment at the anchoring end of each steel strand is divided into two groups before being passed through the hole, and the two groups of strand segments are passed through the left anchor hole and the right anchor hole of the first circumferential prestressed anchor, or the left anchor hole and the right anchor hole of the second circumferential prestressed anchor, respectively.

[0012] Optionally, the first circumferential prestressed anchor and the second circumferential prestressed anchor are arranged on both sides of the bearing of each steel strand in a staggered manner.

[0013] Optionally, during the perforation process, the strand end of each steel strand at the anchorage end is perforated according to a first preset perforation sequence, and the tension end of each steel strand at the anchorage end is perforated according to a second preset perforation sequence.

[0014] Optionally, the wedges are installed at both ends of each steel strand, characterized in that, after the step of installing anchor plates and wedges at the anchoring end and the tensioning end respectively, the circumferential prestressed anchor installation process includes:

[0015] After the clamps are installed, ensure that the gap between each clamp at one end of each steel strand is equal.

[0016] Ensure that the back seats of each clamp at one end of each steel strand are in the same plane.

[0017] Optionally, after each steel strand has been drilled, and after installing anchor plates and wedges at the anchoring end and the tensioning end respectively, the circumferential prestressed anchor installation process includes:

[0018] Install a tool anchor at the tensioning end;

[0019] The positions of the anchor plate holes on the tool anchor are determined to correspond one-to-one with the positions of the anchor holes on the circumferential prestressed anchor.

[0020] Optionally, after the step of determining the one-to-one correspondence between the hole positions of the anchor plate holes on the tool anchor and the hole positions of the anchor holes on the circumferential prestressed anchor, the circumferential prestressed anchor installation process includes:

[0021] Install jacks at the tensioning end;

[0022] The installation axis of the anchor plate and the jack is determined to be in a straight line with the strand segment at the tensioning end of each steel strand.

[0023] Optionally, after each steel strand has been drilled, and after installing anchor plates and wedges at the anchoring end and the tensioning end respectively, the circumferential prestressed anchor installation process includes:

[0024] The exposed strand ends and the circumferential prestressed anchor are sealed to prevent dust and water from entering the circumferential prestressed anchor, as well as the joint between the anchor plate and the anchor pad on the tool anchor.

[0025] Optionally, before the step of installing anchor plates and wedges at the anchoring end and the tensioning end respectively after each steel strand has been drilled, the circumferential prestressed anchor installation process includes:

[0026] Clean the tapered hole on the anchor plate and the surface of the clamping piece.

[0027] This application proposes a circumferential prestressed anchor installation process. Compared with existing technologies where circumferential prestressed anchor installation easily leads to inconsistent prestress at both ends of the load-bearing body, resulting in internal structural instability under excessive load, this application uses a U-shaped steel strand for each strand. The first and second circumferential prestressed anchors are located on both sides of the load-bearing body of each steel strand. The strand segments at the anchorage end of the first steel strand and the strand segments at the tensioning end of the second steel strand are respectively passed through the anchor holes of the first circumferential prestressed anchor. The strand segments at the tensioning end of the first steel strand and the strand segments at the anchorage end of the second steel strand are respectively passed through the anchor holes of the second circumferential prestressed anchor. After each steel strand is passed through the holes, anchor plates and clamps are installed at the anchorage end and the tensioning end respectively for fixing and clamping. This ensures that both sides of the load-bearing body of each steel strand bear the same amount of prestress during tensioning, guaranteeing the stability of the internal structure of the load-bearing body. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a flowchart illustrating the first embodiment of the circumferential prestressed anchor installation process of this application;

[0031] Figure 2 This is a schematic diagram of the first scenario of the first embodiment of the circumferential prestressed anchor installation process of this application;

[0032] Figure 3 This is a schematic diagram of the second scenario of the first embodiment of the circumferential prestressed anchor installation process of this application;

[0033] Figure 4 This is a schematic diagram of the third scenario of the first embodiment of the circumferential prestressed anchor installation process of this application;

[0034] Figure 5 This is a schematic diagram of the fourth scenario of the first embodiment of the circumferential prestressed anchor installation process of this application.

[0035] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0037] This application provides a circumferential prestressed anchor installation process, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the circumferential prestressed anchor installation process of this application.

[0038] In this embodiment, the circumferential prestressed anchor installation process includes:

[0039] Step S10: After each steel strand is threaded through the prestressed anchorage, the strand section at the anchorage end of the first steel strand and the strand section at the tensioning end of the second steel strand are respectively passed through the anchorage hole of the first circumferential prestressed anchorage.

[0040] A circumferential prestressed anchor is a prestressed anchor that allows the strand ends of both the tensioning end and the anchoring end of the steel strand to pass through simultaneously. In other words, the circumferential prestressed anchor integrates anchoring and tensioning. The circumferential prestressed anchor includes an anchor hole at the tensioning end and an anchor hole at the anchoring end.

[0041] like Figure 2 As shown, each steel strand is a U-shaped steel strand, and the first circumferential prestressed anchor and the second circumferential prestressed anchor are on both sides of the bearing body of each steel strand.

[0042] like Figure 2 As shown, if the circumferential prestressed anchor at the upper end of the bearing body is the first circumferential prestressed anchor, after each steel strand is threaded through, the strand segment at the anchorage end of the first steel strand and the strand segment at the tensioning end of the second steel strand are respectively passed through the anchor hole of the first circumferential prestressed anchor. That is, at the upper end of the bearing body, the first steel strand on the left side of the bearing body is passed through the anchor hole of the first circumferential prestressed anchor at the upper end of the bearing body, and the second steel strand on the right side of the bearing body is passed through the anchor hole of the first circumferential prestressed anchor at the upper end of the bearing body, respectively passing through the strand end at the anchorage end of the first steel strand and the strand end at the tensioning end of the second steel strand.

[0043] Step S20: Pass the strand segment at the tensioning end of the first steel strand and the strand segment at the anchoring end of the second steel strand through the anchor hole of the second circumferential prestressed anchor, respectively.

[0044] like Figure 2 As shown, if the circumferential prestressed anchor at the lower end of the bearing body is the second circumferential prestressed anchor, at the lower end of the bearing body, the first steel strand on the left side of the bearing body is passed through the anchor hole of the second circumferential prestressed anchor at the lower end of the bearing body, and the second steel strand on the right side of the bearing body is passed through the anchor hole of the second circumferential prestressed anchor at the lower end of the bearing body, respectively passing through the strand end of the tensioning end of the first steel strand and the strand end of the anchoring end of the second steel strand.

[0045] Each steel strand on the left side of the carrier is perforated in the same manner as the first steel strand, and each steel strand on the right side of the carrier is perforated in the same manner as the second steel strand.

[0046] By passing each remaining steel strand sequentially through the first circumferential prestressed anchor and the second circumferential prestressed anchor in the manner described above, the perforation of each steel strand can be completed.

[0047] Step S30: After each steel strand has been threaded, install anchor plates and wedges at the anchoring end and the tensioning end respectively to complete the installation of the circumferential prestressed anchor.

[0048] Circumferential prestressed anchorages include anchor plates and wedges, etc.

[0049] After each steel strand has been drilled, anchor plates and wedges are installed at the anchoring end and the tensioning end, respectively. Since the components of the circumferential prestressed anchors required at the tensioning end and the anchoring end are different, the installation of the circumferential prestressed anchors can be preliminarily completed after the above steps are completed.

[0050] Each steel strand in this application is a U-shaped steel strand. The first and second circumferential prestressed anchors are located on both sides of the load-bearing body of each steel strand. The strand segments at the anchorage end of the first steel strand and at the tensioning end of the second steel strand are respectively passed through the anchor holes of the first circumferential prestressed anchor. The strand segments at the tensioning end of the first steel strand and at the anchorage end of the second steel strand are respectively passed through the anchor holes of the second circumferential prestressed anchor. After each steel strand is passed through the holes, anchor plates and clamps are installed at the anchorage end and the tensioning end respectively for fixing and clamping. This ensures that both sides of the load-bearing body of each steel strand bear the same amount of prestress, guaranteeing the stability of the load-bearing body's internal structure and preventing breakage.

[0051] Optionally, such as Figure 2As shown, the strands at the anchoring end of each steel strand are divided into two groups before being passed through the holes. The two groups of strands are then passed through the left and right anchor holes of the first circumferential prestressed anchor, or the left and right anchor holes of the second circumferential prestressed anchor, respectively.

[0052] like Figure 3 As shown, the anchor holes on both sides of the circumferential prestressed anchor are the anchor holes at the anchoring end, and the anchor hole in the middle is the anchor hole at the tensioning end.

[0053] This application divides the strand segment at the anchoring end of each steel strand into two groups before perforation, so that when the steel strand at the anchoring end is tensioned by the tensioning end, the tensile stress bearing range of the load-bearing body is wider, and the steel strand is less likely to retract, making the load-bearing body more stable in internal structure and better preventing the load-bearing body from breaking.

[0054] Optionally, the first circumferential prestressed anchor and the second circumferential prestressed anchor are arranged on both sides of the bearing of each steel strand in a staggered manner.

[0055] like Figure 2 As shown, it can be understood that the staggered circumferential prestressed anchors on both sides of the bearing body of each steel strand ensure that the maximum prestress inside the bearing body is not concentrated in the middle part of the bearing body. That is, the prestress on both sides of the bearing body and the prestress in the middle are balanced, making the internal structure of the bearing body more stable and less susceptible to damage by external loads.

[0056] Optionally, during the perforation process, the strand end of each steel strand at the anchorage end is perforated according to a first preset perforation sequence, and the tension end of each steel strand at the anchorage end is perforated according to a second preset perforation sequence.

[0057] During the threading process of the steel strands, the threading is carried out according to a preset threading sequence, such as... Figure 4 As shown, Figure 4 The threading sequence of the strand ends at the tensioning end of the steel strands during the threading process is the second preset threading sequence. According to the numbers, the strand ends of the steel strands at the tensioning end of (1)(8)(18)(11)(2)(5)(9)(15)(12)(6)(10)(19)(16)(3)(7)(20)(17)(13)(4)(21)(22)(14) are sequentially threaded through the anchor holes corresponding to the circumferential prestressed anchors.

[0058] like Figure 5 As shown, Figure 5The threading sequence of the strand ends at the anchorage end of the steel strand during the threading process is the first preset threading sequence. According to the numbers (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22), the strand ends at the anchorage end of the steel strands (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22) are sequentially threaded through the anchor holes corresponding to the circumferential prestressed anchorage.

[0059] The purpose of perforating according to the first and second preset perforation sequences corresponding to the preset perforation sequence is to avoid the opposite torque generated at both ends of each steel strand when the circumferential prestressed anchor deviates during tensioning, which would cause chaotic changes in the prestress inside the bearing body in different directions and lead to instability of the internal structure of the bearing body.

[0060] In this embodiment, the above-described installation process can generate prestress that makes the internal structure of the load-bearing body more stable during the tensioning process.

[0061] Furthermore, based on the above embodiments of the circumferential prestressed anchor installation process, this application also provides a second embodiment.

[0062] In this embodiment, the clamps are installed at both ends of each steel strand. After the steps of installing anchor plates and clamps at the anchoring end and the tensioning end respectively, the circumferential prestressed anchor installation process includes:

[0063] Step S40: After installing the clamps, ensure that the gap between each clamp at one end of each steel strand is equal;

[0064] After installing the clamps, ensure that the gap between each clamp at one end of each steel strand is equal. If the gaps between each clamp are not equal, it will affect the prestressing during subsequent tensioning and grouting processes.

[0065] Step S50: Determine that the back seats of each clamp at one end of each steel strand are on the same plane.

[0066] After the clamps are installed, it is ensured that the back seats of each clamp at one end of each steel strand are on the same plane. This ensures that the clamps are securely installed. If the clamps retract, it will lead to a loss of prestress. On the other hand, after grouting, clamps that are not on the same plane may become loose, resulting in instability of the internal structure.

[0067] In this embodiment, after each steel strand has been drilled, and anchor plates and wedges are installed at the anchoring end and the tensioning end respectively, the circumferential prestressed anchor installation process includes:

[0068] Step S60: Install a tool anchor at the tensioning end;

[0069] At the tensioning end, in addition to the anchor plate and wedges mentioned above, the circumferential prestressed anchor also needs to be installed with a tool anchor.

[0070] Step S70: Determine that the hole positions of the anchor plate holes on the tool anchor correspond one-to-one with the hole positions of the anchor holes on the circumferential prestressed anchor.

[0071] After the tool anchor is installed at the tensioning end, the hole positions of the anchor plate on the tool anchor are determined to correspond one-to-one with the hole positions of the anchor holes on the circumferential prestressed anchor. This is also to avoid the occurrence of inconsistent prestress magnitudes during the tensioning process.

[0072] In this embodiment, after the step of determining the one-to-one correspondence between the hole positions of the anchor plate holes on the tool anchor and the hole positions of the anchor holes on the circumferential prestressed anchor, the circumferential prestressed anchor installation process includes:

[0073] Step S80: Install jacks at the tensioning end;

[0074] At the tensioning end, in addition to the aforementioned anchor plate, wedge, and tool anchor, the circumferential prestressed anchor also needs to be equipped with a jack.

[0075] Step S90: Determine that the installation axis of the anchor plate and the jack is in a straight line with the strand segment at the tensioning end of each steel strand.

[0076] After the jacks are installed at the tensioning end, ensure that the installation axes of the anchor plate and the jacks are aligned with the strand segments at the tensioning end of each steel strand. This is to prevent inconsistencies in the magnitude of prestress generated during the tensioning process.

[0077] In this embodiment, by determining the correct installation positions of the clamps, tool anchors, and jacks, it is possible to avoid inconsistent prestress during the tensioning process.

[0078] Furthermore, based on the above embodiments of the circumferential prestressed anchor installation process, this application also provides a third embodiment.

[0079] In this embodiment, after each steel strand has been drilled, and anchor plates and wedges are installed at the anchoring end and the tensioning end respectively, the circumferential prestressed anchor installation process includes:

[0080] Step S100: Seal the exposed stranded wire end and the circumferential prestressed anchor to prevent dust and water from entering the circumferential prestressed anchor, as well as the joint between the anchor plate and the anchor pad on the tool anchor.

[0081] If tensioning cannot be performed promptly after the circumferential prestressed anchor is installed, the exposed strand ends and the circumferential prestressed anchor should be sealed to prevent dust and water from entering the circumferential prestressed anchor, as well as the joint between the anchor plate and the anchor pad on the tool anchor. This will extend the service life of the circumferential prestressed anchor.

[0082] In this embodiment, before the step of installing anchor plates and wedges at the anchoring end and the tensioning end respectively after each steel strand has been drilled, the circumferential prestressed anchor installation process includes:

[0083] Step S110: Clean the tapered hole on the anchor plate and the surface of the clamping piece.

[0084] Before installing the anchor plate and wedge at the anchoring end and tensioning end respectively, it is necessary to clean the tapered hole on the anchor plate and the surface of the wedge to prevent debris on their surface from corroding the circumferential prestressed anchor and causing prestress loss inside the bearing body, thereby extending the service life of the circumferential prestressed anchor.

[0085] In this embodiment, the service life of the circumferential prestressed anchor is extended by controlling the environmental hygiene of the anchor.

[0086] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0087] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0088] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A process for installing circumferential prestressed anchorages, characterized in that, The installation process of the circumferential prestressed anchor includes the following steps: After each steel strand is threaded through, the strand section at the anchorage end of the first steel strand and the strand section at the tensioning end of the second steel strand are respectively passed through the anchor hole of the first circumferential prestressed anchor. The strand segments at the tensioning end of the first steel strand and the strand segments at the anchoring end of the second steel strand are respectively passed through the anchor holes of the second circumferential prestressed anchor. Before piercing, the strand segments at the anchoring end of each steel strand are divided into two groups. The two groups of strand segments are respectively passed through the left and right anchor holes of the first circumferential prestressed anchor, or the left and right anchor holes of the second circumferential prestressed anchor. The first and second circumferential prestressed anchors are arranged on both sides of the carrier of each steel strand in a staggered manner. During the piercing process, the strand ends at the anchoring end of each steel strand are pierced according to a first preset piercing sequence, and the tensioning ends at the anchoring end of each steel strand are pierced according to a second preset piercing sequence. After each steel strand has been drilled, anchor plates and wedges are installed at the anchoring end and the tensioning end respectively to complete the installation of the circumferential prestressed anchor. Each of the steel strands is a U-shaped steel strand, and the first circumferential prestressed anchor and the second circumferential prestressed anchor are located on both sides of the bearing body of each steel strand.

2. The circumferential prestressed anchor installation process as described in claim 1, wherein the clamps are installed at both ends of each steel strand, characterized in that, After the step of installing anchor plates and wedges at the anchoring end and the tensioning end respectively, the circumferential prestressed anchor installation process includes: After the clamps are installed, ensure that the gap between each clamp at one end of each steel strand is equal. Ensure that the back seats of each clamp at one end of each steel strand are in the same plane.

3. The circumferential prestressed anchorage installation process as described in claim 1, characterized in that, After each steel strand has been drilled, and anchor plates and wedges are installed at the anchoring end and tensioning end respectively, the circumferential prestressed anchor installation process includes: Install a tool anchor at the tensioning end; The positions of the anchor plate holes on the tool anchor are determined to correspond one-to-one with the positions of the anchor holes on the circumferential prestressed anchor.

4. The circumferential prestressed anchorage installation process as described in claim 3, characterized in that, After the step of determining the one-to-one correspondence between the hole positions of the anchor plate holes on the tool anchor and the hole positions of the anchor holes on the circumferential prestressed anchor, the installation process of the circumferential prestressed anchor includes: Install jacks at the tensioning end; The installation axis of the anchor plate and the jack is determined to be in a straight line with the strand segment at the tensioning end of each steel strand.

5. The circumferential prestressed anchorage installation process as described in claim 3, characterized in that, After each steel strand has been drilled, and anchor plates and wedges are installed at the anchoring end and tensioning end respectively, the circumferential prestressed anchor installation process includes: The exposed strand ends and the circumferential prestressed anchor are sealed to prevent dust and water from entering the circumferential prestressed anchor, as well as the joint between the anchor plate and the anchor pad on the tool anchor.

6. The circumferential prestressed anchorage installation process as described in claim 1, characterized in that, Before the step of installing anchor plates and wedges at the anchoring end and the tensioning end respectively after each steel strand has been drilled, the circumferential prestressed anchor installation process includes: Clean the tapered hole on the anchor plate and the surface of the clamping piece.

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