CN202227336U

CN202227336U - Rigid flexible composite foundation pile

Info

Publication number: CN202227336U
Application number: CN2011203382438U
Authority: CN
Inventors: 管自立
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-09
Filing date: 2011-09-09
Publication date: 2012-05-23
Anticipated expiration: 2021-09-09

Abstract

The utility model relates to a rigid flexible composite foundation pile which comprises a main body rigid pile. A flexible composite pile is attached at the outer side of the upper part of the main body rigid pile. The flexible composite pile is a cement soil pile or a discrete pile. The main body rigid pile is a prefabricated steel bar concrete pile or a prestressed pipe pile or a tube-sinking cast-in-situ pile. In the pile sinking process of the composite foundation pile, the large diameter flexible composite pile is placed in a sludge foundation in advance, when the large diameter flexible composite pile and the sludge soil combine and congeal into a stable column body, then the main body rigid pile is divided into sections to be lifted, is hammered into the center of the stable column body, is extruded and expanded and passes through the flexible composite pile, after the flexible composite pile fully congeals, the rigid flexible composite foundation pile is formed. The rigid flexible composite foundation pile provided by the utility model is difficult to incline in the construction process, is high in bearing capacity, etc.

Description

Hard and soft property composite foundation pile

Technical field

The utility model relates to a kind of composite foundation pile of soft foundation construction work.

Background technology

In recent years along with the theoretical developments and the engineering practice of pile soil common action; Adopt rigid pile and flexible pile application in conjunction in composite foundation and composite pile foundation on the soft foundation; Occur to be the composite pile that main body is inserted reinforced concrete core therein with the cement mixing pile, all to have obtained remarkable progress and formulated country and province's standard again a kind of after continuous.

But for being located in the deep weak muck foundation of enclosing and cultivating; Problems appear in the conventional pile foundation construction: (1), when adopting the prestressed pipe construction; At secondary consolidation barged-in fill soft foundation, very easily run-off the straight when ground and excavating foundation trench are squeezed in stake, off normal and come-up are so that carry out consolidation process; (2), when adopting bored pile construction owe fixed, half-flow plastic shape mud or mud burning into sand because barged-in fill has, boring subjects to slump and is difficult to pore-forming, pile; (3), when the cement earth pile that adopts conventional cutter formula Mixing Machine construction, the position is at half-flow plastic shape mud or mud burning into sand layer section, cement earth pile is difficult to moulding and collapse and broken pile occur.

Summary of the invention

The utility model technical problem to be solved is: a kind of hard and soft property composite foundation pile that can adapt to soft foundation is provided.

The technical scheme that the utility model adopted is: a kind of hard and soft property composite foundation pile, comprise the main body rigid pile, and the upper outside of said main body rigid pile is with the flexible compound stake.

The further technical scheme of the utility model is: said flexible compound stake is cement earth pile or granular pile.

Said main body rigid pile is precast reinforced mixed earth stake or pile for prestressed pipe or tube-sinking cast-in-situ pile.

During this composite foundation pile pile sinking; Insert muck foundation to large-diameter flexible composite pile (like cement earth pile) in advance; Treat to combine the stable column body that just congeals into, with main body rigid pile (long stake) merogenesis lifting, squeeze between two parties then with silt soil; Squeezed and pass the flexible compound stake, treat just to become after the flexible compound stake is solidified fully hard and soft property composite foundation pile.

The beneficial effect that the utlity model has: guiding and retaining wall positioning action when utilizing the flexible compound stake to do the preformed pile sinking are difficult for run-off the straight, off normal and come-up when making the main body rigid pile construction; Simultaneously, peripheral flexible compound stake is through the squeezed compound section that forms " soft outside but hard inside " of main body rigid pile (long stake), thereby improvement and the pile peripheral friction force that improves the mud section have improved bearing capacity, have one two function.

Below in conjunction with the accompanying drawing and the specific embodiment the utility model is described further.

Description of drawings

Fig. 1 is the sketch map of a kind of embodiment of the utility model hard and soft property composite foundation pile.

Fig. 2 is the sectional view of hard and soft property composite foundation pile.

Drawing explanation: 1. main body rigid pile (long stake), 2. flexible compound stake, 3. pile cap, 4. silt soil, 5. silt matter clay.

The specific embodiment

Like Fig. 1, shown in Figure 2, the hard and soft property of present embodiment composite foundation pile comprises main body rigid pile 1, and the pile body upper outside of main body rigid pile is with flexible compound stake 2.Flexible piles such as cement earth pile or granular pile are adopted in the flexible compound stake.The main body rigid pile adopts precast reinforced concrete pile or pile for prestressed pipe or tube-sinking cast-in-situ pile.

During this composite foundation pile pile sinking; Muck foundation is inserted in the stake of injection major diameter (being generally 850mm) column flexible compound at place, construction stake position in advance; Main body rigid pile design bearing capacity and requirements such as main body rigid pile construction pile sinking and plant should be satisfied with length in the stake footpath of its flexible compound stake, and its degree of depth should not be less than 12 ~ 15 meters, and the stable column body congeals at the beginning of treating to combine with silt soil; Then main body rigid pile merogenesis is lifted by crane; Squeeze between two parties, squeezed and pass the flexible compound stake, treat just to become after the flexible compound stake is solidified fully hard and soft property composite foundation pile.

Claims

1. a hard and soft property composite foundation pile comprises the main body rigid pile, it is characterized in that: the upper outside of said main body rigid pile is with the flexible compound stake.

2. hard and soft property composite foundation pile according to claim 1, it is characterized in that: said flexible compound stake is cement earth pile or granular pile.

3. hard and soft property composite foundation pile according to claim 1 and 2 is characterized in that: said main body rigid pile is precast reinforced mixed earth stake or pile for prestressed pipe or tube-sinking cast-in-situ pile.