CN2837381Y - Reinforced cement bonded sand composite pile - Google Patents

Abstract

The utility model discloses a reinforced cement bonded sand composite pile comprising a cement body with sand grain and mud pellet inside. The reinforced cement bonded sand composite pile has a rational structure, and greatly improves the strength intensity, the stiffness, the density and the bearing capacity of the pile body. The hardness of the soft part of the bottom and the body of the composite pile is strengthened, effectively increasing the side-friction force of the pile body and resistance of the pile tip.

Description

Stiffness sand-cement composite pile

Technical field:

The utility model relates to the stake that a kind of Foundation Design is used.

Background technology:

During existing ground is handled, general cement mixing pile, the sand-gravel pile etc. of adopting, cement mixing pile (particularly powder spray piling) construction is simple, and cost is lower, has bigger stake surface area that bigger side friction and end resistance is provided, but because of intensity low, the Load Transfer degree of depth is little, generally only is 5～7D, and bearing capacity of single pile lower (especially when soft layers such as underground river creek are arranged), add that some construction team's quality lowly uses inferior materials and turns out substandard goods, accident takes place frequently.And the micro-vibration pipeline sinking pile, a lengthening hand steeredly can pass in and out the field from the hanging tractor, can form compacted sand-gravel pile, plain concrete stake and reinforced concrete pile, be characterized in easy construction, construct in the place that narrower or soft other large-scale stake machines can't be marched into the arena, cheap, vibration, noise are also less, though but sand-gravel pile has compacted and quickens the effect of soil solidifying, " because of itself being bulk solid; its effect is restricted by the passive bound of pile peripheral earth; the Load Transfer degree of depth is littler, only be 2-4D, easily swell is burst bad and the bearing capacity increase rate is less.And the higher plain concrete of rigidity is identical with other rigid pile with steel concrete mini pile, less pile side resistance and end resistance then is provided because of pile body surface is long-pending less, many states that reach capacity because of sedimentation is excessive when pile shaft material intensity is not given full play to, cause pile shaft material intensity major part to be wasted, and bearing capacity of single pile little (intensity of this type and bearing capacity are subjected to this weakness position control and bearing capacity is littler when having soft layer such as underground river creek to exist, even occur " negative friction ").

Summary of the invention:

It is a kind of rational in infrastructure that the purpose of this utility model is to provide, the stiffness sand-cement composite pile that intensity and bearing capacity are big.

Technical solution of the present utility model is:

A kind of stiffness sand-cement composite pile is characterized in that: body of cement is arranged, be furnished with sand grains in the body of cement, be furnished with the earth grain in the body of cement.

In the complex that body of cement and sand grains, grogs form, be provided with steel core.

The utility model is rational in infrastructure, has increased substantially intensity, rigidity, density and the bearing capacity of pile body.At the bottom of the composite pile stake and the weak part hardness of pile body strengthen, effectively improve pile body side-friction force and end resistance.

Description of drawings:

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the configuration diagram of embodiment 1.

Fig. 2 is the configuration diagram of embodiment 2.

The specific embodiment:

Embodiment 1:

A kind of stiffness sand-cement composite pile has body of cement 1, is furnished with sand grains 2 in the body of cement 1, is furnished with earth grain 3 in the body of cement 1.

Can adopt one of following method to carry out during construction:

1, adopt the powder spray piling job practices, during the powder spray, with sand, cement mixing, ejection is together stirred again, and grogs is stirred into, and promptly forms stiffness sand-cement composite pile.

2, adopt the powder spray piling job practices, elder generation's sandblast during the powder spray, and stir formation sand agitation pile, and carry out the cement mixing pile construction again at sand agitation pile center, promptly form stiffness sand-cement composite pile.

3, adopt the powder spray piling job practices, elder generation's spraying cement forms powder spray piling during the powder spray, carries out multiple sandblast at the powder spray piling center again, stirs grogs is stirred into, and promptly forms stiffness sand-cement composite pile.

4, employing wet shot pile construction method pumps cement mortar with mortar pump, stirs grogs is stirred into again, and promptly forms stiffness sand-cement composite pile.

Also can adopt other suitable job practicess.

Embodiment 2:

A kind of stiffness sand-cement composite pile has body of cement 4, is furnished with sand grains 5 in the body of cement 4, is furnished with earth grain 6 in the body of cement 4.In the complex that body of cement 4 and sand grains 5, grogs 6 form, be provided with steel core 7 (reinforcing bar, steel pipe or shaped steel etc.).

Claims (2)

1, a kind of stiffness sand-cement composite pile is characterized in that: body of cement is arranged, be furnished with sand grains in the body of cement, be furnished with the earth grain in the body of cement.

2, stiffness sand-cement composite pile according to claim 1 is characterized in that: be provided with steel core in the complex that body of cement and sand grains, grogs form.

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