一种预应力锚索孔内隔离架

Abstract

本实用新型公开了一种预应力锚索孔内隔离架，属于锚索隔离架技术领域，包括支架本体及设置在该支架本体上并用于注浆管通过的注浆定位孔和用于预应力锚索的钢绞线通过的钢束定位孔，该注浆定位孔开设于支架本体的中央；钢束定位孔设置为至少两个，并与预应力锚索的钢绞线根数分别一一对应，且多个钢束定位孔环绕注浆定位孔呈环状均匀间隔布置；支架本体的外侧壁上设有用于扩展其外径以抵近锚索孔内径的一圈环板。本实用新型的隔离架增加了钻机成孔后孔内壁稳定性的同时，实现了钢绞线、注浆管在锚索孔内分离与定位，保证了施工质量与结构受力安全。

Claims

1. A prestressed cable hole isolation frame, comprising a bracket body (1) and a grouting positioning hole (3) provided on the bracket body (1) and used for grouting pipe (6) to pass through and a steel beam positioning hole (4) used for the steel strand (7) of the prestressed cable to pass through, characterized in that, The grouting positioning hole (3) is located in the center of the support body (1); at least two steel strand positioning holes (4) are provided, and each corresponds to one of the number of steel strands (7) of the prestressed anchor cable, and multiple steel strand positioning holes (4) are arranged in a ring with uniform intervals around the grouting positioning hole (3); a ring plate (2) is provided on the outer wall of the support body (1) to expand its outer diameter to approach the inner diameter of the anchor cable hole (8).

2. The in-hole prestressed cable spacer of claim 1, wherein, The thickness of the ring plate (2) is 0.4-0.9 times the thickness of the support body (1).

3. The in-hole prestressed cable spacer of claim 2, wherein, The ring plate (2) is set on the bracket body (1) by secondary injection molding, and the elastic modulus of the ring plate (2) is greater than that of the bracket body (1).

4. The prestressed anchor cable hole isolation frame according to claim 2, characterized in that, The bracket body (1) and the ring plate (2) are integrally injection molded, or the ring plate (2) is integrally machined from the bracket body (1).

5. The in-hole prestressed cable spacer of any one of claims 1-4, wherein, At least two rings of grout-permeable holes (5) are arranged radially from the inside to the outside on the support body (1), and each ring of grout-permeable holes (5) is evenly distributed in a ring around the grouting positioning hole (3).

6. The in-hole isolation frame for a prestressed cable according to claim 5, characterized in that, The grout passage (5) is set in four rings, and from the inside out, it is composed of a first through hole (51), a second through hole (52) and a third through hole (53) on the support body (1) and a fourth through hole (54) on the ring plate (2). The radiation radius of the steel strand positioning hole (4) is between the first through hole (51) and the third through hole (53). The steel strand positioning hole (4) and the second through hole (52) are staggered in pairs, and the third through hole (53) and the third through hole (53) are staggered in pairs.

7. The in-hole prestressed cable spacer of claim 6, wherein, The number of the first through hole (51) is equal to that of the steel strand positioning hole (4) and the fourth through hole (54), and all three are on the same first ray (A); the number of the second through hole (52) is equal to that of the third through hole (53), and both are on the same second ray (B).

8. The in-hole isolation frame of a prestressed cable according to claim 6, characterized in that, The first through hole (51) and the second through hole (52) are both set to one or more of the following shapes: circular, elliptical or polygonal, and the diameter of the first through hole (51) is smaller than the diameter of the second through hole (52).

9. The pre-stressed cable in-hole spacer of claim 6, wherein, Both the third through hole (53) and the fourth through hole (54) are configured as fan-shaped, and the arc length of the fourth through hole (54) is greater than the arc length of the third through hole (53).

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