CN1091197C

CN1091197C - Umbrella type anchor

Info

Publication number: CN1091197C
Application number: CN 97103512
Authority: CN
Inventors: 张继红
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-03-19
Filing date: 1997-03-19
Publication date: 2002-09-18
Anticipated expiration: 2017-03-19
Also published as: CN1193677A

Abstract

The present invention mainly relates to an anchoring device for providing withdrawal resistance for soil body surfaces in civil building engineering and earth work tests. The anchoring device is called an umbrella type anchoring device. The anchoring device mainly overcomes the defects of the difficulty of construction, the difficulty and shallowness of anchoring into soil bodies, weak withdrawal resistance, etc. of the existing anchoring device; the anchoring device is composed of an anchor head and an anchor rod, wherein the anchor head has a structure which is similar to that of an umbrella; when the anchoring device is anchored into soil bodies, the anchor head is folded up so as to facilitate anchoring and have little disturbance to soil bodies; when the anchoring device works, the anchor head is unfolded, thereby providing strong withdrawal resistance. The anchoring device can be widely applied to the field of engineering of pile foundation tests, anchored retaining walls, deep foundation ditch support, etc.

Description

Umbrella type anchor

The present invention relates to provide in civil construction project and the geotechnique's test anchor device of uplift resistance.

Traditional anchor device comprises ground tackle and cemented roof-bolt etc., these anchor devices in the process that anchors into the soil body and work, the shape of itself, structure and and the soil body between contact condition constant substantially.Thereby have constructional difficulties, anchor into the degree of depth little, shortcomings such as uplift resistance is little are provided.A kind of modifying device to this class known technology---is described---bar that an end that adopts a strip has a foliaceous soil colligator and supports as anchor in Chinese patent CN 1111702A, rotation by colligator, make colligator turn to second opening, the soil colligator is combined with the soil body from initial closed state.Although this device can increase this anchor device uplift resistance reaching under second opening, but still has following several respects shortcoming:

A) this anchor support is at (shown in Figure 11 and Figure 12 a in the patent document CN 1111702A manual) in squeezing into the process of the soil body, because colligator has the flat board (27) of foliation structure, and flat board is bending, and it is bigger that this makes this anchor support squeeze into soil body direction end, and still difficulty is squeezed into the soil body;

B) this anchor support is at (shown in Figure 11 and Figure 12 a in the patent document CN 1111702A manual) in squeezing into the process of the soil body, after reaching the precalculated position, often along stay and squeeze on threaded rod (35) direction end big or small essentially identical space, make blade (as Fig. 9 a in the patent document CN 1111702A manual, b and Figure 13 a, shown in the b) curved end (30a when initial closed state, b) or (55) do not insert the soil body or seldom insert the soil body, the other end (i.e. most advanced and sophisticated (54) or (28)) has inserted the soil body in addition, at (shown in Figure 12 b in the patent document CN 1111702A manual) after squeezing into the soil body, during drawing threaded rod (35), because on the flat board (27) or (53) of foliation structure, not radially away from the effect of the square upward force of threaded rod (35), or this active force do not reach enough greatly, is difficult to make the colligator of this anchor support to turn to second opening to accomplish the end in view from initial closed state.In this space, place, during measure such as penetration concrete, increased considerably engineering cost when adopting along threaded rod (35) direction;

C) this anchor support is when turning to the work of second opening (shown in Figure 12 c in the patent document CN 1111702A manual) after being driven into the precalculated position, the foliation structure of the colligator of anchor support provides the major part of uplift resistance, because the single blade construction of this colligator, make anchoring section stressed asymmetric, and blade construction links to each other with threaded rod (35) in the mode of semi girder, make that flat board (27) or (53) all produces very big moment of flexure with threaded rod (35) in this junction when the anchor support is subjected to external force, thereby make this part-structure higher to the strength of materials and rigidity requirement, squeeze into prebored hole in the process in precalculated position and dismounting slender casing (43) etc. than the complicated operations process in anchor support in addition, make its application and popularization be subjected to bigger restriction.

The object of the present invention is to provide a kind of improved anchor device.The resistance of soil body when this anchor device can reduce to anchor into effectively fully contacts the bigger uplift resistance of generation with the soil body during work, thereby improves the performance of anchor device, the frontier that the developing ground tackle is used.

This umbrella type anchor overlaps three parts by anchor head, anchor pole and anchor pole and forms.Wherein thereby anchor head is the parts that umbrella type anchor and soil body interaction produce uplift resistance, and its working mechanism is similar to common umbrella.It is characterized in that anchor head packs up when anchoring into, the space that occupies is little, play support after, during work, anchor head opens voluntarily, the space that occupies is big, fully contacts with the soil body, anchor pole can re-use.

The present invention compares with existing anchor device, and its anchor is easy to anchor into along narrow, is suitable for mechanized construction, increases work efficiency; Disturbance to the soil body is little, and it is big to anchor into the degree of depth; Ground tackle is when work, and anchor head opens, thereby the uplift resistance that provides is big; The present invention has opened up the frontier that ground tackle is used, and can be applied to pile test, in the engineering fields such as anchor pole shelves cob wall and deep foundation pit support.

Fig. 1 is the sectional view of this umbrella type anchor, and in Fig. 1, parts (1)-(6) are main component, and (7) are standby member, and other (8) and (9) are for key is connected, (10) pin for welding on the anchor pole.

Fig. 2 is the lateral view of this umbrella type anchor.

Contrast Fig. 1 and Fig. 2 further specify the solution of the present invention and embodiment below.

In the drawings, (1) is common drill bit, and its rotation can drive ground tackle and anchor into the soil body; (2) be the umbrella thigh, it can the elephanta umbrella equally struts and can bear certain load; (3) be the tension flexible net, it can be followed strutting of (2) and trail, and enlarges the interaction area of the anchor head and the soil body, and produces bigger uplift resistance with (2); (4) be umbrella handle, these parts are enclosed within on the anchor pole (5), and can slide up and down, its outer rim is connected to as the planar anchor edge (6) of spiral, and it can anchor into the soil body along with the rotation of anchor pole, when ground tackle is subjected to pull out force, (1) driving (2) has the trend that upwards moves, and herein owing to anchor produces resistance along (6), and draws the soil body around the pine, thereby (1) drive (2) and insert the soil body, begin to strut.In case of necessity, anchor pole cover (7) can also be inserted in the anchor pole (5), apply external force in soil body surface and play support.After this umbrella type anchor plays support, because the soil body produces resistance to (2); umbrella handle (4) glides relatively along anchor pole (5); anchor head just can strut voluntarily along with the increase of pull out force; when umbrella handle (4) and common drill bit (1) when locating to contact; no longer downslide, the dimensionally stable of anchor head, thus bigger uplift resistance is provided.The uplift resistance size that it provides is by the length and the intensity decision of umbrella thigh (2).

This umbrella type anchor is in anchoring into the process of the soil body, and the groove (11) of umbrella handle (4) is put in the upper end of umbrella thigh (2), because the lateral pressure of the soil body, the shape of anchor head will remain unchanged.

The anchor head of this umbrella type anchor can separate with anchor pole, and anchor pole can re-use.

Use when of the present invention, earlier anchor head is packed up, make the upper end of umbrella thigh (2) put into the groove (11) of umbrella handle (4), the opening (12) that makes pin (10) on the anchor pole put into umbrella handle (4) is located, and clockwise rotates anchor pole, makes pin and umbrella handle to slide up and down.After ground tackle anchored into, the anchor pole that reverses again made pin and umbrella handle to slide up and down, and ground tackle just can enter duty under external force.

Claims

1. anchor device, mainly be made up of anchor head, anchor pole and anchor pole cover (7), anchor head is packed up in anchoring into the process of the soil body, and the space that occupies is little, after playing support, during work, anchor head opens voluntarily, and the space that occupies is big, fully contact with the soil body, anchor pole can re-use, thereby feature of the present invention is that wherein anchor head is the parts that umbrella type anchor and soil body interaction produce uplift resistance, and it is made up of along (6) common drill bit (1), umbrella thigh (2), umbrella handle (4), anchor pole (5), anchor.

2. according to the said anchor device of claim 1, it is characterized in that space size that anchor head occupies can slide up and down and changes along anchor pole (5) along with umbrella handle (4).

3. according to the said anchor device of claim 1, it is characterized in that umbrella thigh (2) and tension flexible net (3) in the anchor head, can slide up and down and folding pack up or strut along anchor pole (5) along with umbrella handle (4).

4. according to the said anchor device of claim 1, it is characterized in that the outer rim of the umbrella handle (4) in the anchor head is connected to anchor along (6), anchor is the planar structure of spiral along (6).

5. according to the said anchor device of claim 1, it is characterized in that space that the umbrella handle (4) in the anchor head, common drill bit (1), umbrella thigh (2), tension flexible net (3), anchor pole (5) occupy anchor head try one's best little shape and combination thereof when anchor head is packed up.

6. according to the said anchor device of claim 1, when it is characterized in that anchor head is packed up, make the upper end of umbrella thigh (2) put into the groove (11) of umbrella handle (4), the unit construction that the opening (12) that makes pin (10) on the anchor pole put into umbrella handle (4) is located.

7. according to the said anchor device of claim 1, it is characterized in that anchor pole cover (7) can be used for playing the support anchor head in the mode that applies external force.