CN215252899U - Support system with unloading and weight increasing functions - Google Patents
Support system with unloading and weight increasing functions Download PDFInfo
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- CN215252899U CN215252899U CN202023146306.8U CN202023146306U CN215252899U CN 215252899 U CN215252899 U CN 215252899U CN 202023146306 U CN202023146306 U CN 202023146306U CN 215252899 U CN215252899 U CN 215252899U
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Abstract
The utility model belongs to the technical field of underground foundation ditch engineering, side slope support technique and specifically relates to a strut system with off-load weight gain effect, its characterized in that: this strut system includes vertical supporting construction, horizontal off-load weight gain structure and connection structure, wherein vertical supporting construction struts the side that the object received outside soil body pressure to strutting, horizontal off-load weight gain structure follows vertical supporting construction's direction of height arranges and is located and struts below the object elevation, the one end setting of horizontal off-load weight gain structure is in among the outside soil body of side, just horizontal off-load weight gain structure passes through connection structure with vertical supporting construction is connected and constitutes whole strut system. The utility model has the advantages that have that the efficiency of construction is high, environmental impact is little, economic nature is good, material reuse, bear the heap and carry the ability reinforce, this structural system make full use of soil body dead weight has certain self-stability, supporting construction antidumping stability advantage such as good.
Description
Technical Field
The utility model belongs to the technical field of underground foundation ditch engineering, side slope support technique and specifically relates to a support system with off-load weight gain effect.
Background
With the acceleration of urbanization process, geotechnical engineering technology is continuously developed. However, the traditional foundation pit or side slope design does not allow the excavated earthwork to be piled and loaded at the periphery of the foundation pit; the excavation of the large-area foundation pit needs to be provided with the support, so that the construction cost of the foundation pit is higher, and the construction efficiency is lower.
Disclosure of Invention
The utility model aims at providing a strut system with off-load weight gain effect according to above-mentioned prior art not enough, set up transverse member through certain degree of depth department at vertical supporting construction, utilize peripheral suitable heap to carry the atress mode that changes supporting construction, reinforcing supporting construction stability reduces supporting construction and warp, optimizes the supporting construction size.
The utility model discloses the purpose is realized accomplishing by following technical scheme:
a support system with unloading and weight increasing functions is characterized in that: the supporting system comprises a vertical supporting structure, a transverse unloading weight increasing structure and a connecting structure, wherein the vertical supporting structure can bear the horizontal soil pressure outside a supporting object, the transverse unloading weight increasing structure is arranged along the height direction of the vertical supporting structure, one end of the transverse unloading weight increasing structure is arranged in the soil body outside, and the transverse unloading weight increasing structure is connected with the vertical supporting structure through the connecting structure to form an integral supporting system.
The vertical supporting structure and the transverse unloading weight increasing structure adopt pile members or plate members.
The vertical supporting structure is the pile members, the pile members are arranged at intervals along the extending direction of the side edge of the supporting object, and the transverse unloading weight-increasing structure is arranged in an interval gap between the pile members.
The vertical supporting structure is the plate member, and the transverse unloading weight increasing structures are arranged at intervals.
A construction method related to the support system with the unloading and weight increasing effects is characterized in that: the construction method comprises the following steps:
arranging a vertical supporting structure at the position of a supporting object, so that the vertical supporting structure resists the outside soil body pressure of the supporting object;
according to the calculation and on-site monitoring results, arranging a transverse unloading weight-increasing structure at a certain depth of the vertical supporting structure and connecting the transverse unloading weight-increasing structure with the vertical supporting structure to form an integral supporting system;
and bearing a certain amount of stacking load on one side of the supporting object, wherein the stacking load is applied above the transverse unloading weight-increasing structure.
The effective length of the transverse unloading weight-increasing structure arranged in the soil body at the outer side meets the requirement that
In the formula, LiEffective length, H, of the lateral unloading weight-increasing structureiThe depth of the transverse unloading weight-increasing structure below the elevation of a supporting object,
The friction angle of the transverse unloading weight-increasing structure in the soil body,
and filling a slope angle for the supporting object.
The utility model has the advantages that:
1) by arranging the transverse unloading weight increasing structure at a certain depth, the horizontal soil pressure acting on the vertical supporting structure can be reduced, the size of the component is optimized, and the horizontal displacement is reduced.
2) By arranging the transverse unloading weight-increasing structure at a certain depth, the supporting system can bear certain soil body stacking load, and the anti-overturning capacity of a foundation pit and a side slope can be effectively improved; meanwhile, the external earth transportation amount is reduced, the cost is saved, and the construction efficiency is improved.
3) The supporting system can fully utilize the transverse unloading weight-increasing structure to change the stress mode of the supporting structure, adjust the bending moment distribution of the vertical supporting structure and reduce the deformation of the supporting structure.
4) The vertical supporting structure can be prefabricated in an industrial mode, the site construction speed is high, energy is saved, the environment is protected, the environmental influence is small, and the economical efficiency is good.
Drawings
Fig. 1 is a first schematic structural diagram of the present invention;
FIG. 2 is a schematic cross-sectional view of FIG. 1;
FIG. 3 is a schematic plan view of FIG. 1;
FIG. 4 is a plan view of node A of FIG. 1;
FIG. 5 is a longitudinal cross-sectional view of node A of FIG. 1;
FIG. 6 is a second schematic structural view of the present invention;
fig. 7 is a schematic view of the unloading weight gain principle of the present invention;
FIG. 8 is a schematic diagram of the soil pressure calculation of the present invention;
fig. 9 is a schematic diagram of the bending moment calculation of the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:
as shown in fig. 1-9, the labels 1-7 are respectively shown as: the device comprises a vertical supporting structure 1, a transverse unloading weight increasing structure 2, a waist beam 3, angle steel 4, bolts 5, a crown beam 6 and a foundation pit or side slope 7.
The first embodiment is as follows: referring to fig. 1 and 2, the supporting system with unloading and weight increasing effects in this embodiment includes a vertical supporting structure 1, a horizontal unloading and weight increasing structure 2, and a wale 3. In the embodiment, the vertical supporting structure 1 adopts an H-shaped steel fender post, and the transverse unloading weight-increasing structure adopts H-shaped steel.
The vertical supporting structure 1 is arranged at the side edge of the pit wall of the foundation pit or the side slope 7 serving as a supporting object to support the foundation pit or the side slope 7, and resists the inward acting force of the external soil bodies on two sides of the foundation pit or the side slope 7 during supporting so as to avoid overturning. As shown in fig. 3, the vertical supporting structures 1 are arranged at regular intervals along the extending direction of the side of the foundation pit or the side slope 7.
The transverse unloading weight-increasing structure 2 is arranged in a gap between two adjacent vertical supporting structures 1; and the transverse unloading weight-increasing structure 2 is arranged perpendicular to the vertical supporting structure 1, namely the transverse unloading weight-increasing structure 2 is horizontally and transversely arranged. One end of the transverse unloading weight-increasing structure 2 is arranged in the soil body outside the foundation pit or the side slope 7, the other end of the transverse unloading weight-increasing structure extends into the foundation pit or the side slope 7, and the side end of the transverse unloading weight-increasing structure extends out of the vertical supporting structure 1.
As shown in fig. 4 and 5, the vertical supporting structure 1 and the transverse unloading weight-increasing structure 2 are connected and fixed through angle steel 4 and bolts 5. Specifically, one side surface of the angle steel 4 is connected and fixed with a web plate of the transverse unloading weight increasing structure 2 through a bolt 5, and the other side surface of the angle steel 4 is connected and fixed with a flange plate of the vertical supporting structure 1 through the bolt 5, so that the vertical supporting structure 1 and the transverse unloading weight increasing structure 2 are connected and fixed to form a structural unit. And a wale 3 is erected above the transverse unloading weight-increasing structure 2 to connect all the structural units into a whole, so that an integral supporting system is formed. During specific implementation, the waist beam 3 and the transverse unloading weight increasing structure 2 can be fixedly connected with the transverse unloading weight increasing structure 2 in a bolt connection mode, a welding mode and the like, so that the structural strength and the integrity between the waist beam and the transverse unloading weight increasing structure are guaranteed.
As shown in fig. 2, the exposed length of the unloading weight-increasing structure 2 in the foundation pit or the side slope 7, that is, the length of the unloading weight-increasing structure extending out of the vertical supporting structure 1 is flush with the wale 3, so as to ensure the uniformity of stress transmission.
The support system of the embodiment comprises the following construction steps:
1) arranging a vertical supporting structure 1 on the wall of a foundation pit or a side slope 7, wherein the vertical supporting structure 1 can adopt H-shaped steel; the vertical supporting structure 1 is made to resist the outside soil pressure of the foundation pit or the side slope 7.
2) According to the calculation and on-site monitoring results, a transverse unloading weight-increasing structure 2 is arranged at a certain depth of the vertical supporting structure 1, and the transverse unloading weight-increasing structure 2 and the vertical supporting structure 1 are connected through a waist beam 3, angle steel 4 and a bolt 5 to form an integral supporting system.
In this step, the calculation step includes the calculation of the effective length of the lateral unloading weight-increasing structure 2, which refers to the partial length of the lateral unloading weight-increasing structure inserted into the soil body outside the foundation pit or the side slope 7.
The effective length of the transverse unloading weight-increasing structure 2 meets the following requirements:
in the formula, LiEffective length, H, of weight-increasing structure 2 for transverse unloadingiThe depth of the transverse unloading weight-increasing structure 2 below the ground elevation of the foundation pit or the side slope 7,
Is a friction angle of the transverse unloading weight-increasing structure 2 in a soil body outside a foundation pit or a side slope 7,
the filling slope angle of the foundation pit or the side slope 7.
By calculating the effective length of the transverse unloading weight-increasing structure 2 (obtaining the setting depth of the transverse unloading weight-increasing structure 2 at the same time), the stress mode of the whole supporting system can be changed by using the effective length, the bending moment distribution of the vertical supporting structure 1 is adjusted, and the deformation of the supporting structure is reduced.
Specifically, the principle of the support system in this embodiment is as follows:
the supporting system in the embodiment is an improvement on the whole supporting system by utilizing the combination of the pile loading on the ground of a foundation pit or a side slope 7 and a transverse unloading weight-increasing structure 2. Generally speaking, when earth is excavated on the ground of the foundation pit or the side slope 7 and is piled around the foundation pit or the side slope, the pile formed by excavating the earth exerts an acting force on the soil outside the foundation pit or the side slope to deform the soil and generate an inward acting force, and the acting force further deforms or even overturns the foundation pit supporting structure, thereby easily causing danger.
At this time, the lateral unloading weight increasing structure 2 in this embodiment receives an external vertical force and acts on the overall supporting system through the connecting structure, so that the supporting system obtains an additional acting force, and the structural stability of the supporting system is improved. As shown in fig. 7, the left side of fig. 7 is a schematic diagram of a foundation pit supporting structure in the prior art, and the right side of fig. 7 is a schematic diagram of a supporting system in the embodiment. With reference to fig. 8 and 9, in this embodiment, the lateral unloading weight increasing structure 2 is fully utilized to change the stress mode of the supporting structure, reduce the horizontal soil pressure of the supporting structure, adjust the internal force distribution of the vertical supporting system, reduce the deformation of the supporting structure, and improve the anti-overturning stability of the supporting structure.
3) And (4) carrying out stacking loading above the foundation pit or the side slope 7, wherein the stacking loading is applied above the transverse unloading weight-increasing structure 2. The mounding may be excavation earthwork obtained during excavation of the foundation pit.
Example two: the difference between the present embodiment and the first embodiment is: as shown in fig. 6, in this embodiment, the vertical supporting structure 1 is a precast pile, the horizontal unloading weight increasing structure 2 is a precast pile, the waist beam 3 is a cast-in-place structure, and a crown beam 6 is poured on top of each precast pile serving as the vertical supporting structure 1. Wherein, the wale 3 is a horizontal component connected with the extending part of the transverse unloading weight-increasing structure 2. In the embodiment, the waist beam 3 and the crown beam 6 of the cast-in-place structure are used as connecting structures, and the vertical supporting structure 1 and the transverse unloading weight-increasing structure 2 are connected into an integral supporting system, so that enough structural strength can be ensured.
The above embodiments are embodied as follows: the structures of the vertical supporting structure 1, the transverse unloading structure 2 and the waist beam 3 can be selected according to actual conditions. When the vertical supporting structure 1 adopts a pile component, the vertical supporting structure 1 and the transverse unloading weight increasing structure 2 are arranged at intervals; when the vertical supporting structure 1 adopts a plate member, the transverse unloading weight increasing structures 2 can be arranged at certain intervals, namely two or more than two transverse unloading weight increasing structures are arranged at intervals along the vertical direction (the depth direction of the foundation pit or the side slope 7) of the vertical supporting structure 1, so that the supporting effect of the supporting system is further improved.
Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, the description thereof is not repeated herein.
Claims (4)
1. A support system with unloading and weight increasing functions is characterized in that: the supporting system comprises vertical supporting structures, transverse unloading weight increasing structures and connecting structures, wherein the vertical supporting structures can bear the horizontal soil pressure of the outer side of a supporting object, the transverse unloading weight increasing structures are arranged along the height direction of the vertical supporting structures, one ends of the transverse unloading weight increasing structures are arranged in soil bodies on the outer side, the transverse unloading weight increasing structures are connected with the vertical supporting structures through the connecting structures to form an integral supporting system, and the transverse unloading weight increasing structures are arranged in gaps between every two adjacent vertical supporting structures.
2. The support system with unloading and weight increasing functions according to claim 1, wherein the support system comprises: the vertical supporting structure and the transverse unloading weight increasing structure adopt pile members or plate members.
3. The support system with unloading and weight increasing functions according to claim 2, wherein the support system comprises: the vertical supporting structure is the pile members, the pile members are arranged at intervals along the extending direction of the side edge of the supporting object, and the transverse unloading weight-increasing structure is arranged in an interval gap between the pile members.
4. The support system with unloading and weight increasing functions according to claim 2, wherein the support system comprises: the vertical supporting structure is the plate member, and the transverse unloading weight increasing structures are arranged at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023146306.8U CN215252899U (en) | 2020-12-24 | 2020-12-24 | Support system with unloading and weight increasing functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023146306.8U CN215252899U (en) | 2020-12-24 | 2020-12-24 | Support system with unloading and weight increasing functions |
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| CN215252899U true CN215252899U (en) | 2021-12-21 |
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| CN202023146306.8U Active CN215252899U (en) | 2020-12-24 | 2020-12-24 | Support system with unloading and weight increasing functions |
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- 2020-12-24 CN CN202023146306.8U patent/CN215252899U/en active Active
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