CN1208102A

CN1208102A - Deposited pile and its construction

Info

Publication number: CN1208102A
Application number: CN 98116992
Authority: CN
Inventors: 叶长生
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-07-31
Filing date: 1998-07-31
Publication date: 1999-02-17

Abstract

The deposited reinforced concrete pile has expanded parts in different depth and may have grouting pipes reaching separately the base of pile and the base of expanded parts. It has grouted reinforced net around it. During the construction, pile hole with expanded parts is first formed from top to bottom with auger and reamer; reinforcing bar cage and grouting pipes are then set and concrete is deposited to form pile; and cement mortar is finally grouted from bottom to top via the grouting pipes. Pile has high bearing capacity.

Description

A kind of castinplace pile and job practices thereof

The present invention relates to a kind of castinplace pile and job practices thereof.

Castinplace pile is that first pore-forming is gone up in a kind of stake position at the construction field (site), is provided with in the hole then behind reinforcing cage and the concrete perfusion and the foundation pile that forms.Known castinplace pile is isometrical solid pile, and consumable material is many, and own wt is heavy, has not only reduced the supporting capacity of ground, and because the bearing capacity of pile concrete is far longer than the resistance of ground to stake, and cause the wide variety of materials waste.

The purpose of this invention is to provide a kind of castinplace pile and job practices thereof that under the prerequisite of the bearing capacity that does not reduce stake, can reduce construction cost greatly.

The principal character of this castinplace pile is the concrete enlarged footing that forms hole enlargement on the different depth position of isometrical steel concrete solid pile.

The further feature of this castinplace pile be provided with in the isometrical steel concrete solid pile direct reach at the bottom of and insert the grout pipe of soil layer and direct reach at least two grout pipes of each concrete enlarged footing bottom position, and around the stake end of isometrical steel concrete solid pile and the pile body and the concrete enlarged footing around form the permeation enhanced net of grouting.

The job practices of this castinplace pile is:

One, on the stake position, adopt drill to form a hole and enlarged footing hole the demarcation degree of depth piecemeal by designing requirement from top to bottom until the stake hole with the mutual method of replacement of reaming bit;

Two, in the stake hole, place reinforcing cage behind the clear hole;

Three, concrete perfusion is to position, stake top.

The further measure of this job practices is:

In reinforcing cage to be placed, lay at the bottom of directing reach and will insert the grout pipe of soil layer and direct reach at least two grout pipes of each concrete enlarged footing bottom position, behind concrete perfusion and the pile, inject cement grout to the grout pipe high pressure from bottom to top again.

Above-mentioned concrete enlarged footing according to the geology condition setting in having the power of the holding soil layer of higher-strength, can obtain bigger vertical bearing ability, add pile after high-pressure slip-casting at the bottom of stake and around the pile body and around the concrete enlarged footing the permeation enhanced net of formed grouting to the further reinforcement of stake intensity with to the further raising of pile capacity, certainly will cause designing the stake footpath, the stake high and the stake number minimizing, like this, casting amount in the pile hole construction and the consumption of materials in the formation of pile will reduce, and its final good effect is exactly to greatly reduce construction cost under the prerequisite of the bearing capacity of guaranteeing stake.Consider from another angle, adjust the diameter and the number of concrete enlarged footing, can satisfy the requirement of upper load again to the bearing capacity of stake, thereby be convenient to control and stable construction quality, in addition, job practices vibration of the present invention is little, noise is low, do not need special installation, technology is simple, and is widely applicable.

Illustrate particular content of the present invention below in conjunction with drawings and Examples.

Fig. 1: the structure chart of castinplace pile of the present invention;

Fig. 2: the job practices schematic diagram of castinplace pile of the present invention.

As shown in Figure 1, castinplace pile of the present invention is the concrete enlarged footing 2 that forms hole enlargement on the different depth position of isometrical steel concrete solid pile 1.The position of this concrete enlarged footing 2 is to set according to the geological conditions on the stake position, generally it is arranged in the power of the holding soil layer with higher-strength, to make full use of the bearing capacity of foundation soil; The number of concrete enlarged footing 2, diameter and thickness then will be determined according to designing requirement and in conjunction with geological conditions.In order further to improve the supporting capacity of this castinplace pile, can in isometrical steel concrete solid pile 1, be provided with at the bottom of directing reach and insert the grout pipe 3 of soil layer and direct reach at least two grout pipes 4,5 of each concrete enlarged footing 2 bottom position, and around the stake end of isometrical steel concrete solid pile 1 and the pile body and concrete enlarged footing 2 around form the permeation enhanced net 6,7,8 of grouting.These permeation enhanced nets the 6,7, the 8th that are in the milk, the high pressure cement slurries are extruded towards periphery soil layer infiltration and formed in conjunction with the back with the layer of sand in the soil layer, macadam through grout pipe 3,4,5, can consolidating pile with the adhesion of soil layer, thereby a bearing capacity that improves.

The job practices of above-mentioned castinplace pile is explained as follows with reference to Fig. 2:

One, on the stake position, adopt drill to form a hole 9 and enlarged footing hole 10 the demarcation degree of depth piecemeal by designing requirement from top to bottom until stake hole 9 with the mutual method of replacement of reaming bit;

Two, in stake hole 10, place reinforcing cage 11 behind the clear hole;

Three, concrete perfusion is to position, stake top.

Drill and reaming bit are installed in the head that double as is inhaled the hollow drilling pipe of mud pipe use, and displacement is used mutually, in the process of drilling soil layer, water under high pressure pours into soil layer around hollow drilling pipe, and is mixed after hollow drilling pipe is sucted discharge by dredge pump with water by the earth of drilling.

For the permeation enhanced net 6,7,8 of grouting is set, this job practices can be done following adjustment and replenish: promptly lay at the bottom of directing reach in reinforcing cage to be placed 11 and will insert the grout pipe 3 of soil layer and direct reach at least two grout pipes 4,5 of each concrete enlarged footing 2 bottom position, behind concrete perfusion and the pile, inject cement grout to grout pipe 3,4,5 high pressure from bottom to top again.Grouting pressure is 0.3-30MPa, and grout pipe 3,4,5 will suitably be tied up solid on reinforcing cage 11.The quantity of the grout pipe 4,5 of each concrete enlarged footing 2 will be determined according to the size of concrete enlarged footing 2, and adopt symmetry or balanced the laying.

Claims

1, a kind of castinplace pile is characterized in that: the concrete enlarged footing (2) that forms hole enlargement on the different depth position of isometrical steel concrete solid pile (1).

2, castinplace pile according to claim 1, it is characterized in that: in isometrical steel concrete solid pile (1), be provided with at the bottom of directing reach and insert the grout pipe (3) of soil layer and direct reach at least two grout pipes (4,5) of each concrete enlarged footing (2) bottom position, and around the stake end of isometrical steel concrete solid pile (1) and the pile body and concrete enlarged footing (2) around form the permeation enhanced net (6,7,8) that is in the milk.

3, the job practices of the described castinplace pile of a kind of claim 1 is characterized in that: one, adopt drill to form a hole (9) and enlarged footing hole (10) the demarcation degree of depth until stake hole (9) piecemeal by designing requirement from top to bottom with the mutual method of replacement of reaming bit on the stake position; Two, in stake hole (10), place reinforcing cage (11) behind the clear hole; Three, concrete perfusion is to position, stake top.

4, the job practices of castinplace pile according to claim 3, it is characterized in that: in reinforcing cage to be placed (11), lay at the bottom of directing reach and will insert the grout pipe (3) of soil layer and direct reach at least two grout pipes (4,5) of each concrete enlarged footing (2) bottom position, behind concrete perfusion and the pile, inject cement grout to grout pipe (3,4,5) high pressure from bottom to top again.