CN204456145U - Flush type micro combination pile group - Google Patents

Abstract

The utility model relates to a kind of flush type micro combination pile group, comprising: at least two row's two row mini piles, and each mini pile is by being arranged in the load-bearing section of gliding mass and being arranged in the fixed section composition of sliding bed; The load-bearing segment length of each mini pile is: or the load-bearing segment length of each mini pile is: described L _2iwith predetermined length constant sum; Wherein, L _2ibe the load-bearing segment length of i-th row's mini pile, K is the design safety factor of mini pile, T _ibe the Thrust of Landslide of i-th row's mini pile load, the Thrust of Landslide of different row's mini pile load is different, n _ibe i-th row's mini pile every linear meter(lin.m.) mini pile quantity, D _ibe the stake footpath of i-th row's mini pile, q _ifor the adhesion strength of mini pile pile concrete and its all Rock And Soil.The technical scheme that the utility model provides, while ensure that the prevention effect of landslide control engineering, greatly reduces the construction costs of preventing land slide.

Description

Flush type micro combination pile group

Technical field

The utility model relates to a kind of preventing land slide technology, particularly relates to a kind of flush type micro combination pile group.

Background technology

Mini pile has obtained and has applied comparatively widely in landslide control engineering, and in actual applications, mini pile is normally arranged in landslide with the form of micro combination pile group.

Mini pile in existing landslide control engineering adopts total length formula set-up mode usually, and namely mini pile is through to the earth's surface on landslide always from sliding bed, and that is, the stake top of mini pile needs the earth's surface reaching landslide.

Inventor is realizing finding in the utility model process, and the part that mini pile works in preventing land slide is usually in the upper and lower certain limit of slide strips, and mini pile pile body role under earth's surface in certain limit little, which results in waste to a certain degree.At present, mini pile flush type set-up mode is suggested, and mini pile flush type set-up mode refers to that the stake apex distance of mini pile exists certain distance from the earth's surface on landslide.Stake top due to each mini pile in flush type set-up mode no longer needs the earth's surface reaching landslide, therefore, the length of the mini pile in flush type set-up mode is shorter than the length of the mini pile in total length formula set-up mode, thus effectively can reduce the cost of mini pile.But, when adopting mini pile flush type set-up mode in landslide control engineering, how reasonably to determine the length of embedment on mini pile stake top, make mini pile can either farthest play preventing land slide effect, can have lower cost again, be a technical problem urgently to be resolved hurrily.

Because technical problem urgently to be resolved hurrily needed for existing mini pile flush type set-up mode, inventor is based on being engaged in the practical experience and professional knowledge that this type of product design manufacture enriches for many years, and coordinate reasonably utilization, actively in addition research and innovation, to founding a kind of flush type micro combination pile group, effectively can solve the problems of the technologies described above, make it have more practicality.Through constantly research, design, through repeatedly studying sample and after improving, finally creating the utility model had practical value.

Utility model content

One of the purpose of this utility model is; a kind of flush type micro combination pile group is provided; problem to be solved comprises: make micro combination pile group can either farthest play preventing land slide effect; lower cost of manufacture can be had again; and then while the construction costs reducing preventing land slide; guarantee the prevention effect of landslide control engineering, be very suitable for practicality.

The purpose of this utility model and solve its technical problem and can adopt following technical scheme to realize.

According to a kind of flush type micro combination pile group that the utility model proposes, comprising: at least two row's two row mini piles, and each mini pile is by being arranged in the load-bearing section of gliding mass and being arranged in the fixed section composition of sliding bed; The load-bearing segment length of each mini pile is: or the load-bearing segment length of each mini pile is: described L _2iwith predetermined length constant sum; Wherein, L _2ibe the load-bearing segment length of i-th row's mini pile, K is the design safety factor of mini pile, T _ibe the Thrust of Landslide of i-th row's mini pile load, the Thrust of Landslide of different row's mini pile load is different, n _ibe i-th row's mini pile every linear meter(lin.m.) mini pile quantity, D _ibe the stake footpath of i-th row's mini pile, q _ifor the adhesion strength of mini pile pile concrete and its all Rock And Soil; Wherein, the load-bearing segment length of described each mini pile is L _2ibe applicable to adopt L in the load-bearing segment length of each mini pile with predetermined length constant sum _2ithe coefficient of stability of the part more than the stake top of each mini pile of the gliding mass that Shi Liyong Method for Numerical calculates does not meet predetermined requirement.

Preferably, aforesaid flush type micro combination pile group, wherein the cross-sectional area of the longitudinal rib of each mini pile is: wherein, A _sibe the cross-sectional area of the longitudinal rib of i-th row's mini pile, K is the design safety factor of mini pile, T _ibe the Thrust of Landslide of i-th row's mini pile load, n _ibe i-th row's mini pile every linear meter(lin.m.) mini pile quantity, τ _sfor the shear strength of arrangement of reinforcement.

Preferably, aforesaid flush type micro combination pile group, the longitudinal rib of wherein said mini pile comprises: reinforcing cage, tendon, steel pipe or shaped steel.

Preferably, aforesaid flush type micro combination pile group, wherein the fixed section length of each mini pile is:

wherein, L _1ibe the fixed section length of i-th row's mini pile, K is the design safety factor of mini pile, T _ibe the Thrust of Landslide of i-th row's mini pile load, n _ibe i-th row's mini pile every linear meter(lin.m.) mini pile quantity, D _ibe the stake footpath of i-th row's mini pile, q _ifor the adhesion strength of mini pile pile concrete and its all Rock And Soil.

By technique scheme, flush type micro combination pile group of the present utility model at least has following advantages and beneficial effect: the utility model calculates by utilizing the Thrust of Landslide of each mini pile load being respectively arranged in different row the load-bearing segment length that each mini pile being positioned at different row is in gliding mass respectively, and will the load-bearing segment length of Method for Numerical detection be successfully passed as final micro combination pile group anti-slide design parameter, make micro combination pile group can either farthest play preventing land slide effect, lower cost can be had again; Thus the technical scheme that the utility model provides is while reducing the construction costs of preventing land slide, ensure that the prevention effect of landslide control engineering.

In sum, the utility model has significant progress technically, and has significantly positive technique effect, is really a new and innovative, progressive, practical new design.

Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to technological means of the present utility model can be better understood, and can be implemented according to the content of manual, and can become apparent to allow above and other object of the present utility model, feature and advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.

Accompanying drawing explanation

Fig. 1 is the flush type micro combination pile group schematic diagram be arranged in gliding mass and sliding bed of the present utility model;

Fig. 2 is the micro combination pile group isosceles triangle arrangement schematic diagram of the A-A ' section of Fig. 1.

Description of reference numerals:

1 gliding mass; 2 slide strips; 3 sliding beds; 4 mini piles.

Detailed description of the invention

For further setting forth the utility model for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to according to its detailed description of the invention of flush type micro combination pile group, structure, feature and the effect thereof that the utility model proposes, be described in detail as follows.

The flush type micro combination pile group of the present embodiment is at least made up of two row's two row mini piles, and each mini pile is by load-bearing section and fixed section composition; Wherein, the load-bearing segment length of each mini pile can be:

$L_{2i}=\frac{K\×T_i}{n_i\×\mathrm{\π}\×D_i\×q_t}$ Formula (1)

In above-mentioned formula (1), L _2ibe the load-bearing segment length that i-th row's mini pile is in gliding mass, K is the design safety factor of mini pile, T _ibe the Thrust of Landslide of i-th row's mini pile load, n _ibe i-th row's mini pile every linear meter(lin.m.) mini pile quantity, D _ibe the stake footpath of i-th row's mini pile, q _tfor the adhesion strength of mini pile pile concrete and its all Rock And Soil.

The load-bearing segment length of each mini pile also can be: above-mentioned L _2iwith predetermined length constant sum.

The above-mentioned L calculated by formula (1) _2ibe applicable to adopt L in the load-bearing segment length of each mini pile _2ithe coefficient of stability of the part more than the stake top of each mini pile of the gliding mass that Shi Liyong Method for Numerical calculates can meet pre-provisioning request.

Above-mentioned L _2ibe applicable to adopt L in the load-bearing segment length of each mini pile with predetermined length constant sum _2ithe coefficient of stability of the part more than the stake top of each mini pile of the gliding mass that Shi Liyong Method for Numerical calculates does not meet predetermined requirement; That is, above-mentioned L _2ibe applicable to when the load-bearing segment length of each mini pile adopts this numerical value sum, the coefficient of stability of the part more than the stake top of each mini pile of the gliding mass utilizing Method for Numerical to calculate can meet pre-provisioning request with predetermined length constant sum.

Mini pile in the present embodiment load-bearing segment length be in gliding mass refers to the length of mini pile higher than slide strips part.

In above-mentioned formula (1), T _iit is the Thrust of Landslide being positioned at each mini pile difference load of different row determined according to the arrangement parameter of micro combination pile group.

Concrete, micro combination pile group in the present embodiment is flush type micro combination pile group, namely micro combination pile group adopts and imbeds set-up mode and be arranged in landslide, as shown in Figure 1, a part for mini pile 4 embeds and is fixed in sliding bed 3, forms fixed section, and another part of mini pile 4 is arranged in the gliding mass 1 on slide strips 2, form load-bearing section, namely the mini pile 4 of the present embodiment is made up of fixed section and load-bearing section, and the stake apex distance of each mini pile 4 exists certain distance from the earth's surface of gliding mass 1.

The arrangement parameter of the micro combination pile group in the present embodiment generally includes: mini pile line number and mini pile columns.Here mini pile line number refers to the line number of the mini pile set by the glide direction along gliding mass.Here mini pile columns refers to the columns of mini pile set on the direction perpendicular with the glide direction of gliding mass.Each mini pile place in micro combination pile group adopts mini pile group (namely a mini pile group externally shows as a mini pile), the mini pile line number in the present embodiment and mini pile columns can be for base unit and the line number of micro combination pile group that formed and columns with mini pile group.A concrete example, in fig. 2, three mini piles 4 form the mini pile group of an isosceles triangle, multiple mini pile group forms micro combination pile group, and Fig. 2 is only the part in whole micro combination pile group, in this part micro combination pile group, mini pile line number is 4, and mini pile columns is 5.

The each mini pile being arranged in different row in the present embodiment respectively Thrust of Landslide of load utilizes the mini pile line number of arrangement parameter to determine.In actual applications, first Thrust of Landslide (i.e. every linear meter(lin.m.) Thrust of Landslide) should be calculated for concrete landslide, the present embodiment thinks that the Thrust of Landslide calculated not is be distributed on each mini pile in micro combination pile group equably, that is, the Thrust of Landslide being in the mini pile institute load of diverse location in micro combination pile group is not identical.For a certain mini pile in micro combination pile group, the mini pile line number that the Thrust of Landslide of this root mini pile institute load and micro combination pile group comprise and this line correlation residing for root mini pile.

The mini pile line number that the present embodiment can comprise according to micro combination pile group and the concrete row residing for single mini pile are searched from the Thrust of Landslide allocation table preset, the Thrust of Landslide allocation proportion of each mini pile being positioned at different row can be obtained from lookup result, then, the Thrust of Landslide that the Thrust of Landslide allocation proportion found determines to be positioned at each mini pile difference load of different row is recycled.

An object lesson of the Thrust of Landslide allocation table preset as described in Table 1.

Table 1

	Two campsheds	Three campsheds	Four campsheds	Five campsheds	Six campsheds
						First campshed	1.2	1.3	1.4	1.6	1.65
Second campshed	0.8	1.0	1.15	1.2	1.35
						3rd campshed		0.7	0.85	1.0	1.1
4th campshed			0.6	0.7	0.9
						5th campshed				0.5	0.6
6th campshed					0.4

As shown in Table 1, if micro combination pile group is made up of two rows' mini pile (two campsheds namely in table 1), then in first row mini pile (the first campshed namely in table 1), in each mini pile and second row mini pile (the second campshed namely in table 1), the Thrust of Landslide ratio of each mini pile institute load is 1.2: 0.8, that is, Thrust of Landslide 60 percent by first row mini pile load, Thrust of Landslide 40 percent by second row mini pile load; If micro combination pile group is made up of three row's mini piles, then in first row, second row, the 3rd row's mini pile, the Thrust of Landslide ratio of each mini pile institute load is 1.3: 1: 0.7, that is, Thrust of Landslide 43 about percent by first row mini pile load, Thrust of Landslide 33 about percent by second row mini pile load, Thrust of Landslide 23 about percent by the 3rd row's mini pile load; By that analogy, other numerical value comprised in this not his-and-hers watches 1 illustrate one by one.

Thrust of Landslide in the present embodiment can be the Thrust of Landslide adopting in existing specification the method for recommending to calculate, the specific implementation of the present embodiment not limit calculation Thrust of Landslide.

Set-up mode is imbedded because micro combination pile group adopts, therefore, the stake apex distance of each mini pile has certain distance (as shown in Figure 1) from the earth's surface of gliding mass, the present embodiment should ensure the coefficient of stability of this part gliding mass not carrying out Skid Resistance Measures, ensures that this part gliding mass can not produce new slip.

Reference data based on the load-bearing segment length of the above-mentioned each mini pile calculated can be supplied to the application of certain numerical simulation by the present embodiment, certainly, according to the actual demand of numerical simulation application, also reference data based on other parameters can be supplied to numerical simulation application, as the arrangement parameter etc. of micro combination pile group.The application of this numerical simulation can export the coefficient of stability of this part gliding mass not carrying out anti-slide design after predetermined analog computation.

The coefficient of stability in the present embodiment can adopt existing Method for Numerical to calculate, and the present embodiment does not limit the specific implementation process of the actual Method for Numerical calculation stability coefficient adopted.

In the present embodiment, pre-provisioning request can be specially: the coefficient of stability that this part gliding mass not carrying out anti-slide design determined according to the grade of landslide control engineering will reach.At L _2ibasis on adopt numerical simulation calculation to go out the coefficient of stability be less than required by reach the coefficient of stability when, the L that the load-bearing segment length of each mini pile no longer adopts above-mentioned formula (1) to calculate _2i, and the L that above-mentioned formula (1) calculates should be greater than _2i, namely the load-bearing segment length of each mini pile is L _2iwith predetermined length constant sum, and at L _2ithe coefficient of stability reached required by should being greater than or equal to the coefficient of stability that the basis of predetermined length constant sum adopts numerical simulation calculation to go out; At L _2ibasis on adopt numerical simulation calculation to go out the coefficient of stability be greater than or equal to required by reach the coefficient of stability when, the L that the load-bearing segment length of each mini pile adopts above-mentioned formula (1) to calculate _2i.

The predetermined length constant corresponding to load-bearing segment length of different mini piles can identical (as all mini piles load-bearing section the stepping length that increases identical), also can different (as all mini piles load-bearing section the stepping length that increases not identical); A concrete example, the load-bearing section of each mini pile increases certain ratio etc. of himself length (or load-bearing segment length).The present embodiment also only can carry out for the part mini pile in micro combination pile group the operation of load-bearing segment length increasing mini pile, and the load-bearing section of all mini piles in this part can increase identical length; Certainly, the load-bearing section of all mini piles in this part also can increase different length, and the load-bearing section as each mini pile increases certain ratio etc. of himself length (or load-bearing segment length).

In the present embodiment, the longitudinal reinforcement cross-sectional area of each mini pile can utilize following formula (2) to determine:

$A_{\mathrm{si}}=\frac{{\mathrm{KT}}_i}{n_i{\mathrm{\τ}}_s}$ Formula (2)

In formula (2), A _sibe the cross-sectional area of the longitudinal rib of i-th row's mini pile, K is the design safety factor of mini pile, T _ibe the Thrust of Landslide of i-th row's mini pile load, n _ibe i-th row's mini pile every linear meter(lin.m.) mini pile quantity, τ _sfor the shear strength of arrangement of reinforcement.

It should be noted that, if micro combination pile group is be base unit with mini pile group micro combination pile group, then A _si, T _iand n _ishould be all for base unit with mini pile group; The micro combination pile group that if micro combination pile group is is base unit with single mini pile, then A _si, T _iand n _ishould be all for base unit with single mini pile.

In the present embodiment, the arrangement of reinforcement of mini pile can adopt the forms such as reinforcing cage, tendon, steel pipe or shaped steel.

The fixed section length that each mini pile being arranged in different row in the present embodiment is in sliding bed can be the length calculated based on following formula (3)

$L_{1i}=\frac{K\×T_i}{n_i\×\mathrm{\π}\×D_i\×q_t}$ Formula (3)

In above-mentioned formula (3), L _1ibe the fixed section length that i-th row's mini pile is in sliding bed, K is the design safety factor of mini pile, T _ibe the Thrust of Landslide of i-th row's mini pile load, n _ibe i-th row's mini pile every linear meter(lin.m.) mini pile quantity, D _ibe the stake footpath of i-th row's mini pile, q _tfor the adhesion strength of mini pile pile concrete and its all Rock And Soil.

The above is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, although the utility model discloses as above with preferred embodiment, but, above-described embodiment is also not used to limit the utility model, any those skilled in the art are not departing within the scope of technical solutions of the utility model, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solutions of the utility model, according to any simple modification that technical spirit of the present utility model is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.

Claims (4)

1. a flush type micro combination pile group, is characterized in that, comprising:

At least two row's two row mini piles, and each mini pile is by being arranged in the load-bearing section of gliding mass and being arranged in the fixed section composition of sliding bed;

The load-bearing segment length of each mini pile is: or

The load-bearing segment length of each mini pile is: described L _2iwith predetermined length constant sum;

Wherein, L _2ibe the load-bearing segment length of i-th row's mini pile, K is the design safety factor of mini pile, T _ibe the Thrust of Landslide of i-th row's mini pile load, the Thrust of Landslide of different row's mini pile load is different, n _ibe i-th row's mini pile every linear meter(lin.m.) mini pile quantity, D _ibe the stake footpath of i-th row's mini pile, q _ifor the adhesion strength of mini pile pile concrete and its all Rock And Soil;

Wherein, the load-bearing segment length of described each mini pile is L _2ibe applicable to adopt L in the load-bearing segment length of each mini pile with predetermined length constant sum _2ithe coefficient of stability of the part more than the stake top of each mini pile of the gliding mass that Shi Liyong Method for Numerical calculates does not meet predetermined requirement.

2. flush type micro combination pile group as claimed in claim 1, it is characterized in that, the cross-sectional area of the longitudinal rib of each mini pile is:

$A_{\mathrm{si}}=\frac{{\mathrm{KT}}_i}{n_i{\mathrm{\τ}}_s};$

Wherein, A _sibe the cross-sectional area of the longitudinal rib of i-th row's mini pile, K is the design safety factor of mini pile, T _ibe the Thrust of Landslide of i-th row's mini pile load, n _ibe i-th row's mini pile every linear meter(lin.m.) mini pile quantity, τ _sfor the shear strength of arrangement of reinforcement.

3. flush type micro combination pile group as claimed in claim 2, it is characterized in that, the longitudinal rib of described mini pile comprises: reinforcing cage, tendon, steel pipe or shaped steel.

4. the flush type micro combination pile group as described in claim 1 or 2 or 3, is characterized in that, the fixed section length of each mini pile is:

$L_{1i}=\frac{K\×T_i}{n_i\×\mathrm{\π}\×D_i\×q_t};$

Wherein, L _1ibe the fixed section length of i-th row's mini pile, K is the design safety factor of mini pile, T _ibe the Thrust of Landslide of i-th row's mini pile load, n _ibe i-th row's mini pile every linear meter(lin.m.) mini pile quantity, D _ibe the stake footpath of i-th row's mini pile, q _ifor the adhesion strength of mini pile pile concrete and its all Rock And Soil.