桩基高应变检测导向锤架

Abstract

本实用新型涉及桩基检测领域，尤其涉及一种桩基高应变检测导向锤架。该导向锤架内顶部悬挂有落锤，落锤自由下落冲击待检测桩基；导向锤架上设有可竖向移动调节后定位的定位件，导向锤架顶部设置有提升装置把落锤提升至其顶面贴住定位件。操作人员用吊机把导向锤架安装到待检测桩基周侧的地面上使待检测桩基位于落锤底部，根据待检测桩基的情况计算确定落锤需下落的距离h，就操作定位件竖直上移距离h调节到所需高度后进行定位，然后操作提升装置把落锤提升至其顶面贴住定位件，落锤提升的高度即为距离h，释放落锤使其自由下落距离h冲击待检测桩基。落锤的提升高度可精确控制，检测准确性较高。

Claims

1. A pile foundation high strain detection guide hammer frame, characterized in that: The top of the hammer is suspended by a drop hammer (2), which falls freely to impact the pile foundation (3) to be tested; the feature is that the guide hammer frame (1) is provided with a positioning component (4) that can be vertically moved and adjusted for positioning, and the top of the guide hammer frame (1) is provided with a lifting device to lift the drop hammer (2) to its top surface to stick to the positioning component (4).

2. A pile high strain detection guide hammer frame as claimed in claim 1, characterised in that: The lifting device includes a rope reel (15), on which a steel wire rope (5) is wound vertically downward. A drop hammer (2) is installed at the end of the steel wire rope (5). The rope reel (15) rotates to take in and release the steel wire rope (5) so that the drop hammer (2) is vertically lifted and lowered.

3. A pile high strain detection guide hammer frame as claimed in claim 2, characterised in that: Four vertical guide posts (13) are arranged at intervals around the drop hammer (2). Each guide post (13) has a vertical guide groove (131) on its inward side. Four guide blocks (132) extend horizontally from the top of the drop hammer (2). The four guide blocks (132) are arranged at intervals around the circumference and extend into the four vertical guide grooves (131). The top surface of the guide blocks (132) is flush with the top surface of the drop hammer (2). When the rope wheel (15) drives the drop hammer (2) to rise and fall vertically, the guide blocks (132) rise and fall vertically along the vertical guide grooves (131).

4. A pile high strain detection guide hammer frame as claimed in claim 3, characterised in that: The wire rope (5) has an end cap (19) installed at its end, and three ports (191) are provided at its bottom, of which: The bottom of the central port (191) is connected to a locking wire rope (51), and the top center of the drop hammer (2) is installed at the bottom of the locking wire rope (51); The front and rear ports (191) are each connected to a safety wire rope (52). The top of the front and rear guide blocks (132) are connected to the bottom of the safety wire rope (52). The safety wire rope (52) is longer than the locking wire rope (51). It is usually in a slack state. When the lock wire rope (51) accidentally loosens at the center of the top of the drop hammer (2), it tightens and pulls the drop hammer (2).

5. A pile high strain detection guide hammer frame as claimed in claim 4, characterised in that: The bottom of the locking wire rope (51) is connected to a self-detaching hook (17), and a locking ring (21) is provided at the center of the top of the drop hammer (2). The self-detaching hook (17) hooks the locking ring (21) so that the center of the top of the drop hammer (2) is installed at the bottom of the locking wire rope (51). The bottom of the safety wire rope (52) is connected to a safety self-detaching hook (18), and a safety ring (136) is installed on the top of the front and rear guide blocks (132). The safety self-detaching hook (18) hooks the safety ring (136) so that the top of the front and rear guide blocks (132) is installed at the bottom of the safety wire rope (52).

6. A pile high strain detection guide hammer frame as claimed in claim 3, characterised in that: One of the guide posts (13) has a scale on its outward side, and the positioning element (4) is inserted through the guide post (13).

7. The pile high strain detection guide hammer bracket of claim 1, wherein: Includes a base (11), and a guide column (13) installed on the top of the base (11); the base (11) has a first through hole (111) in the center for the pile foundation (3) to be tested to pass through, and the axes of the drop hammer (2) and the first through hole (111) are coincident; the bottom of the base (11) is provided with a liftable support leg (12) to adjust the top surface of the base (11) to align with the top surface of the pile foundation (3) to be tested.

8. A pile high strain detection guide hammer frame as claimed in claim 2, characterised in that: The winding rope wheel (15) is provided with a first driving motor (151), the first driving motor (151) drives the winding rope wheel (15) to rotate to wind and unwind the steel wire rope (5).

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