Press pile force locking structure of anchor rod static pressure pile

Abstract

The utility model discloses an anchor rod static pressure pile pressing force locking structure which comprises an anchor rod static pressure pile and anchor rods pre-buried in a bearing foundation around an anchor rod static pressure pile hole, the anchor rods are symmetrically distributed with the anchor rod static pressure pile hole as the center, and the top of each anchor rod is sleeved with a first counter-force frame and a second counter-force frame which are arranged in parallel. The sides, deviating from the anchor rod static pressure pile, of the first reaction frame and the second reaction frame are jacked and limited through a fastening nut mounted on the anchor rod; the bottom of the first reaction frame abuts against the top of the anchor rod static pressure pile, a hydraulic jack is placed on the top of the first reaction frame, and the top of the hydraulic jack abuts against the bottom of the second reaction frame. According to the structure, the pile pressing force is permanently locked in the building foundation through the synergistic effect of the counter-force frame and the pile sealing concrete, an active reinforcing measure is adopted, and the effect of permanently reinforcing the foundation can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of building tilt correction and foundation reinforcement technology, specifically to an anchor static pressure pile pressure locking structure. Background Technology

[0002] In the field of industrial and civil building reinforcement and foundation strengthening projects, anchored static pressure piles are often used as the main reinforcement method. This reinforcement method is an active reinforcement measure that uses the existing building's own weight load as the pile driving reaction force, and uses jacks to press the pile segments into the foundation soil layer. During the pile driving process, an upward lifting force is generated on the existing building. Therefore, anchored static pressure piles can effectively improve the foundation bearing capacity of existing buildings and control their settlement.

[0003] During the implementation of anchored static pressure piles, a reaction force acts on the existing building; after implementation, the reaction force dissipates as the pile driving force disappears. However, in correction and foundation reinforcement projects, it is often necessary to lock the pile driving force of the anchored static pressure piles to promptly curb settlement deformation. Therefore, developing a new structure capable of locking the pile driving force is particularly urgent. Utility Model Content

[0004] The purpose of this utility model is to provide a static pressure pile anchoring force locking structure to solve the problems existing in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A static pressure pile anchoring force locking structure includes a static pressure pile and anchors embedded in the bearing foundation around the pile hole of the static pressure pile. The anchors are symmetrically distributed around the pile hole of the static pressure pile. A first reaction frame and a second reaction frame are installed on the top of the anchors in parallel. The side of the first reaction frame and the second reaction frame away from the static pressure pile is tightened and limited by a set nut installed on the anchor. The bottom of the first reaction frame abuts against the top of the static pressure pile. A hydraulic jack is placed on the top of the first reaction frame, and the top of the hydraulic jack abuts against the bottom of the second reaction frame.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] 1. This structure can lock the static pressure pile driving force of the anchor rod, and retain the opposite upward pull force at the bottom of the existing building foundation, thereby reducing the base reaction force, reducing the drag settlement of the foundation, and playing a role in reducing settlement.

[0009] 2. This structure uses a hand-cranked hydraulic jack (including an oil gauge) to apply force to the static pressure pile, and the pile driving force can be monitored at any time;

[0010] 3. This structure is flexible in application and easy to construct. By combining two reaction frames, the loss of pile driving force caused by pressure fluctuations of hydraulic jacks during the pile sealing process can be avoided.

[0011] 4. The construction of this structure is carried out on the existing static pressure pile foundation, which has the characteristics of energy saving and environmental protection, and can save manpower, material resources and resources.

[0012] 5. This structure permanently locks the pile driving force inside the building foundation by vibrating and pouring C30 or C35 micro-expansion early strength concrete in the pile hole. It is an active reinforcement measure that can permanently reinforce the foundation and has a good effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 for Figure 1 A schematic diagram of the reaction frame structure.

[0015] Figure 3 This is a schematic diagram of the post-sealing pile structure applied in this utility model.

[0016] In the diagram, 1-first reaction frame, 2-second reaction frame, 3-anchor rod, 4-set nut, 5-anchor static pressure pile, 6-hydraulic jack, 7-channel steel, 8-I-beam. Detailed Implementation

[0017] The technical solution of this utility model will be further explained below with reference to the accompanying drawings.

[0018] like Figure 1 As shown, a static pressure pile anchoring force locking structure includes a static pressure pile 5 and anchor rods 3 pre-embedded in the bearing foundation around the pile hole of the static pressure pile 5. The anchor rods 3 are symmetrically distributed around the pile hole of the static pressure pile 5. A first reaction frame 1 and a second reaction frame 2 arranged in parallel are sleeved on the top of the anchor rod 3. The side of the first reaction frame 1 and the second reaction frame 2 away from the static pressure pile 5 is tightened and limited by a set nut 4 installed on the anchor rod 3. The bottom of the first reaction frame 1 abuts against the top of the static pressure pile 5. A hydraulic jack 6 is placed on the top of the first reaction frame 1. The top of the hydraulic jack 6 abuts against the bottom of the second reaction frame 2.

[0019] The implementation process of this utility model's pile driving force locking structure is as follows:

[0020] First, the construction of anchor static pressure pile 5 and the bearing foundation around the pile hole is carried out;

[0021] Secondly, after the anchor static pressure pile 5 reaches the designed depth in terms of pile driving force and pile driving depth, the pile driver is removed.

[0022] Then, place the first reaction frame 1 on the top surface of the anchor static pressure pile 5, and place the hydraulic jack 6 with an oil gauge on the first reaction frame 1. Then place the second reaction frame 2 on the hydraulic jack 6. Note that the second reaction frame 2 is installed on the anchor 3 through the set nut 4 and is pressed against the top of the hydraulic jack 6. The set nut 4 on the first reaction frame 1 is in the loose state. Figure 2 As shown, the first reaction frame 1 and the second reaction frame 2 have the same structure, both of which are welded together from two channel steels 7 and one I-beam 8.

[0023] Next, the hydraulic jack 6 is started manually by hand. During the lifting process, as the lifting force is applied to the second reaction frame 2, the first reaction frame 1 and the anchor static pressure pile 5 will receive a downward pile driving force, and the bottom surface of the existing building foundation will receive an upward pulling force in the opposite direction until the pile driving force displayed on the jack oil gauge is consistent with the original pile driving force. At this time, the set nut 4 on the back side of the first reaction frame 1 is locked, which also locks the pile driving force.

[0024] Finally, C30 or C35 micro-expansion early-strength concrete is vibrated and poured into the pile hole. After the concrete strength reaches the design requirements, the first reaction frame 1, the second reaction frame 2, and the hydraulic jack 6 are removed. Excess piles and anchors exposed on the foundation surface are then removed using static cutting methods, forming a structure as shown below. Figure 3 The building foundation permanent reinforcement structure shown.

[0025] This utility model uses the synergistic effect of the reaction frame and the sealing concrete to permanently lock the pile driving force of the anchor static pressure pile inside the building foundation, reducing the additional settlement of the building foundation, timely curbing abnormal and uneven settlement deformation of the building, and improving the effect of building tilt correction and foundation reinforcement.

Claims

1. An anchor rod static pressure pile pressing force locking structure, characterized by, The structure includes a static pressure pile (5) and an anchor rod (3) pre-embedded in the bearing foundation around the pile hole of the static pressure pile (5). The anchor rod (3) is symmetrically distributed around the pile hole of the static pressure pile (5). The top of the anchor rod (3) is fitted with a first reaction frame (1) and a second reaction frame (2) arranged in parallel. The side of the first reaction frame (1) and the second reaction frame (2) away from the static pressure pile (5) is tightened and limited by the set nut (4) installed on the anchor rod (3). The bottom of the first reaction frame (1) abuts against the top of the static pressure pile (5). A hydraulic jack (6) is placed on the top of the first reaction frame (1). The top of the hydraulic jack (6) abuts against the bottom of the second reaction frame (2).

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