CN213805466U

CN213805466U - Foundation reinforcing structure of many stake types

Info

Publication number: CN213805466U
Application number: CN202021838282.XU
Authority: CN
Inventors: 林启辉; 陈伟坚; 陈浅然; 武学跃
Original assignee: Guangdong Jianke Construction Engineering Technology Development Co ltd
Current assignee: Guangdong Jianke Construction Engineering Technology Development Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-07-27
Anticipated expiration: 2030-08-28

Abstract

The utility model discloses a foundation strengthening structure of many stake types, including raft foundation or cushion cap locate and plan to consolidate building and region around to be connected with the building, the top layer reservation of raft foundation or cushion cap has and is used for setting the stake hole position of stock static pressure pile and drilling bored concrete steel pipe pile, the stock static pressure pile that has set up in the front and the drilling bored concrete steel pipe pile that sets up behind have in the stake hole position, the stake end of drilling bored concrete steel pipe pile gets into in the holding force layer of basement rock. The utility model is suitable for a geological region that geological environment is comparatively sensitive, solution cavity is developed complicacy.

Description

Foundation reinforcing structure of many stake types

Technical Field

The utility model relates to a building engineering technical field especially relates to a foundation reinforcement structure of many stake types.

Background

Due to the multiple reasons of reconnaissance, design, construction, change of use function, change of adjacent environment and the like, the building possibly has insufficient bearing capacity of the original foundation and is subjected to uneven settlement. The foundation reinforcement is needed, and the anchor rod static pressure pile and the cast-in-situ bored pile are common foundation reinforcement structures at present.

The anchor rod static pressure pile is used as a friction pile, and the friction force provided by the pile side can provide a certain bearing capacity for the foundation to prevent the building from continuously settling.

The bored pile can be designed as an end-bearing pile, and the load is mainly borne by the pile end resistance. During construction, the bearing pile penetrates through a soft soil layer and enters a bearing layer for a certain depth, the end bearing pile can provide stable bearing capacity for an upper structure, and large disturbance can be generated on the soil layer during drilling construction.

When the method is used for construction in areas sensitive to geological environments, such as complex karst cave development, the single reinforcing mode cannot meet the foundation reinforcing requirement. When the soft soil layer is obviously settled, the anchor rod static pressure pile is adopted to generate the influence of negative friction force, and the foundation settlement can be caused under the long-term action, so that the upper structure is cracked; by adopting the drilling and column-filling piles, the original structural system and stress state of the soil layer can be changed and the settlement of the foundation structure can be accelerated during drilling construction, so that the original stability of the building structure is damaged.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a foundation reinforcement structure of many stake types can wide application in the geological region that geological environment is comparatively sensitive, solution cavity is developed complicatedly and other only use single traditional stake types can't satisfy the foundation reinforcement requirement.

The technical scheme of the utility model as follows:

the utility model provides a basic reinforced structure of many stake types, includes raft foundation or cushion cap, raft foundation or cushion cap are located and are planned reinforcement building and surrounding area to be connected with the building, the top layer reservation of raft foundation or cushion cap has the stake hole position that is used for setting up stock static pressure pile and drilling cast-in-place steel pipe pile, have the stock static pressure pile that sets up before in the stake hole position and the drilling cast-in-place steel pipe pile that sets up after, the pile end of drilling cast-in-place steel pipe pile gets into in the bearing layer of basement rock.

The utility model discloses earlier utilize to carry out interim ending to sinking to the building basis and handle to the less stock static pressure stake of soil body disturbance, recycle the more stable drilling bored concrete steel pipe pile of bearing capacity and carry out ultimate basis reinforcement to the building structure and handle, be applicable to the geological region that the geological environment is comparatively sensitive, solution cavity develops complicacy.

The utility model discloses an stock static pressure stake evenly distributed is in raft foundation or cushion cap are regional.

The utility model discloses an anchor rod static pressure pile is prefabricated type concrete pile or steel-pipe pile.

The utility model discloses a drilling bored concrete steel-pipe pile is end-bearing pile.

Further, the bored steel pipe pile is a friction end-bearing pile.

The utility model discloses a drilling bored concrete steel-pipe pile evenly arranges and is being close to the atress structural area of building.

The utility model discloses a drilling bored concrete steel-pipe pile gets into the degree of depth of bed rock and is no less than 0.5 m.

The utility model discloses a drilling bored concrete steel-pipe pile adopts segmentation welded overcoat steel pipe.

Compared with the prior art, the beneficial effects of the utility model are as follows:

many stake type foundation strengthening structure can exert simultaneously stock static pressure stake to the soil body disturbance less with the stable technical characterstic of drilling cast-in-place steel pipe pile bearing capacity, consolidate the building basis. The construction technology is simple and convenient to operate, has small influence on the foundation and the soil layer of the original structure, is high in safety, and can be widely applied to geological regions which are sensitive to geological environment, complex in karst cave development and cannot meet foundation reinforcement requirements only by using a single traditional pile type.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a sectional view of a multi-pile type foundation reinforcing structure of the present invention, which shows a partial structure;

fig. 2 is a plan view of pile position distribution of the multi-pile type foundation reinforcement structure of the present invention;

FIG. 3 is a construction flow chart of the multi-pile foundation reinforcement structure of the present invention;

description of reference numerals:

1-building, 2-raft foundation, 3-anchor rod static pressure pile, 4-drilling cast-in-place steel pipe pile and 5-pile pressing device.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments accompanying the drawings are described in detail below. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

The embodiment is based on raft foundation's reinforced structure for the example the utility model discloses a concrete structure, as shown in fig. 1 to fig. 3, the utility model discloses a basic reinforced structure of many stake types, including raft foundation 2, raft foundation 2 locates and plans reinforcement building 1 and its surrounding area to be connected with building 1, raft foundation 2's top layer is reserved has the stake hole site that is used for setting up stock static pressure stake 3 and drilling bored concrete steel pipe pile 4. The anchor static pressure pile 3 arranged in the front and the drilled cast-in-place steel pipe pile 4 arranged in the rear are arranged in the pile hole position, and the pile end of the drilled cast-in-place steel pipe pile 4 enters a bearing stratum of the bedrock to a certain depth.

Wherein, raft foundation 2 can be concrete raft, is connected with building 1 through the reinforcing bar, and raft foundation also can be replaced by bearing platform type's structures such as basis. At the stake hole site department of reserving, pre-buried stock static pressure pile 3, stock static pressure pile 3 is prefabricated type concrete pile or steel-pipe pile, and evenly distributed utilizes the jack to carry out the pile pressing in raft foundation 2's region, and when the pile pressing was to the designing requirement, then sealed the stake through sealing device 5, so far, 3 construction completions of stock static pressure pile.

And then, constructing the bored steel pipe pile 4, wherein the bored steel pipe pile 4 is an end-bearing pile, preferably a friction end-bearing pile, and the friction end-bearing pile is formed by using outer sleeved steel pipes welded in sections. During construction, a drilling machine is used for drilling holes, and the depth of the drilled holes is not less than 0.5m when the steel pipe piles 4 are poured into the bedrock. After drilling, the steel pipes are put into the holes in sections, after the steel pipes are put well, grouting is carried out at the bottom of the holes by using grouting pipes, pile sealing is carried out by using a pile sealing device 5 after grouting is finished, and the construction of the bored steel pipe piles 4 is also finished.

As a preferred embodiment, the utility model discloses a still should pay attention to following matters in the many stake type basis reinforced structure work progress:

(1) when the jack is used for pressing the pile, the pile pressing process must be continuous and the pile section should be kept vertical;

(2) the anchor rod static pressure piles and the drilled and poured steel pipe piles are uniformly arranged, and the distance between the piles is determined according to the design requirements of different projects, so that the pile group effect is avoided;

(3) the anchor rod static pressure piles are uniformly distributed in a raft area, and the drilled and poured steel pipe piles are arranged in areas close to stressed structures such as columns, shear walls and the like as much as possible;

(4) if a karst cave exists at the pile position during the advance drilling, cement mortar is needed to be poured into the hole opening for reverse grouting, and then the pile is formed continuously;

(5) in order to avoid the phenomena of hole collapse and hole shrinkage, a method of mud wall protection is adopted. If the mud guard wall is in a section difficult to form a hole, a steel cylinder guard wall method is adopted;

(6) and after the cement paste is initially set, filling the cement paste into the steel pipe pile again for the first time to prevent the cement paste from shrinking.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a basic reinforced structure of many piles type, includes raft foundation or cushion cap, its characterized in that, raft foundation or cushion cap are located and are planned reinforcement building and surrounding area to be connected with the building, the top layer of raft foundation or cushion cap reserves the stake hole position that is used for setting up stock static pressure pile and drilling bored concrete steel pipe pile, have the stock static pressure pile that sets up before in the stake hole position and the drilling bored concrete steel pipe pile that sets up after, the pile tip of drilling bored concrete steel pipe pile gets into in the bearing stratum of basement rock.

2. The multi-pile foundation reinforcing structure of claim 1, wherein the anchor rod static piles are uniformly distributed in the raft foundation or cap area.

3. The multi-pile foundation reinforcing structure of claim 2, wherein the anchor static pile is a prefabricated concrete pile or a steel pipe pile.

4. The multi-pile foundation reinforcement structure of claim 1, wherein the bored steel pipe pile is an end-supported pile.

5. The multi-pile foundation reinforcement structure of claim 4, wherein the bored steel pipe pile is a friction end-bearing pile.

6. The multi-pile foundation reinforcement structure of claim 4 or 5, wherein the bored steel pipe piles are uniformly arranged in a stressed structural area adjacent to the building.

7. The multi-pile type foundation reinforcing structure of claim 6, wherein the depth of the bored steel pipe pile into the bedrock is not less than 0.5 m.

8. The multi-pile foundation reinforcing structure of claim 6, wherein the bored steel pipe pile is a sectional welded outer jacket steel pipe.