CN212453828U

CN212453828U - Double-layer raw material yard structure constructed on deep soft soil foundation

Info

Publication number: CN212453828U
Application number: CN202021095232.7U
Authority: CN
Inventors: 李梦云; 田田; 崔军; 陈龙
Original assignee: Wuhan Surveying Geotechnical Research Institute Co Ltd of MCC
Current assignee: Wuhan Surveying Geotechnical Research Institute Co Ltd of MCC
Priority date: 2020-06-14
Filing date: 2020-06-14
Publication date: 2021-02-02
Anticipated expiration: 2030-06-14

Abstract

The utility model provides a be under construction in double-deck raw material yard structure of deep weak soil foundation. The raw material yard structure comprises an underground stacking chamber, an overground stacking chamber and an artificial upper and lower channel, wherein the underground stacking chamber is an underground space structure formed by constructing an underground continuous wall below a soft soil layer from the ground and then excavating to the bottom surface of the soft soil layer, a first raft plate layer is laid on the bottom surface of the underground stacking chamber, and a feeding conveying channel and a discharging conveying channel are respectively arranged on two sides of the underground stacking chamber; the side columns on two sides of the above-ground stacking chamber are respectively arranged above the underground continuous wall, the material shed is erected at the top of each side column, the bottom surface of the above-ground stacking chamber consists of a bearing beam and a second raft slab layer paved on the bearing beam, and a support column is arranged between the above-ground stacking chamber and the underground stacking chamber. The utility model discloses leave out the step that soft base was handled, practiced thrift the occupation of land space, make full use of foundation soil self intensity and bearing capacity correction on the degree of depth, can improve the bearing capacity greatly, avoided the ground subside to become various diseases to the knot structure.

Description

Double-layer raw material yard structure constructed on deep soft soil foundation

Technical Field

The utility model relates to a geotechnical engineering ground is handled, underground space exploitation utilizes design technical field, especially utilizes the underground space to be under construction in the double-deck raw material yard structure of deep weak soil foundation.

Background

The stock yard is an indispensable important ring of steel enterprises and plays a role in preparing and treating more than 95% of materials of the steel enterprises. The dust pollution caused by open storage yards becomes a main pollution source for unorganized emission in the processes of raw material production, transportation and storage. At present, with the increasing of environmental protection strength, open-air storage yards face huge pressure and are converted into a totally-closed storage mode. The closed stock ground can effectively reduce the pollution to the surrounding environment, and has the characteristics of large storage capacity per unit area, small material loss and easy material classification and storage.

The material shed of the closed stock ground is generally a large-span reticulated shell structure, the width of a single span exceeds 90m, the width of a double-span arch exceeds 180m, the material shed foundation is sensitive to sedimentation and horizontal deformation, the foundation deformation can be transmitted to the grid rods through the upright posts, the additional stress of the rods is increased, even the rods reach an over-stress state and are damaged, the grid structure is damaged, and particularly under the condition of windy load and snow load superposition. The mineral aggregate stockpiling area is large in area and large in load, the foundation of the mineral aggregate stockpiling area is large in settlement, horizontal thrust and deformation are generated on a latticed shell foundation, safety of the foundation and the latticed frame is affected, and particularly a raw material yard is constructed on a deep soft soil foundation, and generally the foundation is firstly treated, then the bearing capacity and the deformation control requirements are met, and then stockpiling is carried out. The drainage channel is preset and the drainage consolidation is carried out by the aid of the graded preloading, so that the drainage consolidation is one of the most common modes for reinforcing soft soil foundations, particularly, the natural foundation is subjected to preloading drainage consolidation treatment, the foundation reaches certain strength, CFG piles or stirring piles are arranged in a material strip area and a material taking machine area for reinforcement, and the treatment mode has the defect that the construction period is long and is as long as 8 months to 12 months. Therefore, a novel double-layer stock yard structure is needed to shorten the construction period and effectively avoid various diseases caused by ground settlement of a stockpiling area.

Disclosure of Invention

The utility model provides a to above-mentioned problem, provide a be under construction in double-deck raw material field structure of deep soft soil foundation, soft soil foundation in the natural foundation is directly dug out to this raw material field structure, forms the underground compost layer, can leave out the weak soil processing procedure, practices thrift the engineering time, can practice thrift simultaneously and take up an area of the space to make full use of foundation soil self intensity and bearing capacity are the correction on the degree of depth, improve the bearing capacity greatly, can avoid ground subside to the various diseases of structure.

In order to achieve the purpose, the utility model provides a double-layer raw material yard structure constructed on a deep soft soil foundation, which comprises an underground stacking chamber arranged below the ground, an above-ground stacking chamber and an artificial upper and lower channel communicated with the underground stacking chamber, wherein the underground stacking chamber is excavated to the bottom surface of a soft soil layer to form an underground space structure after constructing an underground continuous wall below the soft soil layer from the ground, a first raft plate layer is laid on the bottom surface of the underground stacking chamber, a feeding conveying channel and a discharging conveying channel are respectively arranged on two sides of the underground stacking chamber, and the feeding conveying channel and the discharging conveying channel are respectively communicated with the ground; the side columns on two sides of the above-ground stacking chamber are respectively arranged above the underground continuous wall, the material shed is erected at the top of each side column, the bottom surface of the above-ground stacking chamber consists of a bearing beam and a second raft slab layer paved on the bearing beam, and a support column is arranged between the above-ground stacking chamber and the underground stacking chamber.

The utility model discloses further technical scheme: the first raft layer and the second raft layer are both made of reinforced concrete raft plates, the bottom of the first raft layer is provided with a gravel leveling layer, and two ends of the first raft layer and the second raft layer are respectively provided with drainage ditches.

The utility model discloses better technical scheme: the middle part of the ground material piling chamber is provided with a material distribution area, the support columns are arranged in two rows and are distributed on the bottom surface of the material distribution area at equal intervals, each support column is a cast-in-situ bored pile, and the diameter of the cast-in-situ bored pile is 1.2 m.

The utility model discloses better technical scheme: the feeding conveying channel and the discharging conveying channel are arranged at the two side parts of the underground stacking chamber, and material belt conveyors are arranged in the feeding conveying channel and the discharging conveying channel and extend into the underground stacking chamber.

The utility model discloses better technical scheme: the underground continuous wall and the side columns are both of reinforced concrete structures, the thickness of the underground continuous wall is 1.2m, the bottom of the underground continuous wall is embedded below the bottom surface of the underground stockpiling room, and the embedding depth is 2/3 of the space height of the underground stockpiling room; the side columns are connected with the underground continuous wall.

The utility model discloses better technical scheme: the artificial up-down passage is arranged on the side surface of the ground stacking chamber and adopts a staircase form.

The utility model discloses better technical scheme: the material shed adopts a net rack shell structure.

The utility model discloses better technical scheme: the thickness of first raft sheet layer and second raft sheet layer is 0.8m, and the bearing beam width of second raft sheet layer lower part is 1.2m, and the height is 1.5 m.

The invention has the following excellent technical scheme: the drainage ditch is of a reinforced concrete structure, the width of the drainage ditch is 0.8m, and the depth of the drainage ditch is 1.0 m.

The utility model excavates the soft soil foundation in the natural foundation, constructs the underground raw material stacking layer below the ground, omits the step of treating the soft soil and saves the time; meanwhile, the stockyard is changed from stockpiling on the ground plane to stockpiling on the solid, and the occupied area is saved under the condition of the same stockpiling; similar to the structure of a basement, the self strength of the foundation soil and the correction of the bearing capacity on the depth are fully utilized, and the bearing capacity is greatly improved. In general, the depth of the basement is 13m, the corrected value of the bearing capacity of the foundation in the depth is 13mx16kPa/m, namely 208kPa, and the sum of the corrected value and the inherent bearing capacity of the foundation soil in situ 130kPa can reach 318 kPa. The double-layer structure avoids various diseases caused by the settlement and knot structure of deep soft soil, and can be applied to the engineering of constructing a closed large-scale stock yard on a complex deep soft soil foundation.

Drawings

FIG. 1 is a schematic view of the double-layer stock yard structure of the present invention;

FIG. 2 is a cross-sectional view AA of FIG. 1;

FIG. 3 is a schematic view of the bottom of an above ground stacking chamber when the underground stacking chamber is dug;

fig. 4 is a schematic diagram of material distribution or taking of the present invention.

In the figure: 1-material shed, 2-side column, 3-underground continuous wall, 4-spandrel girder, 5-support column, 6-second raft slab, 7-first raft slab, 8-rubble leveling layer, 9-underground piling chamber, 10-aboveground piling chamber, 11-manual upper and lower channels, 12-feeding conveying channel, 13-discharging conveying channel, 14-drainage ditch, 15-distributing area, 16-material conveying belt machine, 17-piling, 18-distributing reclaimer, and 19-soil reclaiming port.

Detailed Description

The present invention will be further explained with reference to the drawings and examples. Fig. 1 is a drawing of an embodiment, which is drawn in a simplified manner and is only used for the purpose of clearly and concisely illustrating an embodiment of the present invention. The following detailed description of the embodiments of the present invention is presented in the drawings and is not intended to limit the scope of the invention as claimed. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The embodiment provides a double-layer raw material yard structure constructed on a deep soft soil foundation, and particularly as shown in fig. 1 and 2, the raw material yard structure comprises an underground stacking chamber 9 arranged below the ground, an above-ground stacking chamber 10 arranged above the ground and an artificial up-and-down passage 11 leading to the underground stacking chamber 9, wherein the artificial up-and-down passage 11 is arranged on the side surface of the above-ground stacking chamber 10 and is in the form of a staircase. The underground material piling chamber 9 is formed by constructing the underground continuous wall 3 below the soft soil layer from the ground and then excavating to the bottom surface of the soft soil layer, the underground continuous wall 3 is of a reinforced concrete structure, the thickness of the underground continuous wall 3 is 1.2m, the bottom of the underground continuous wall is embedded below the bottom surface of the underground piling chamber 9, the embedding depth is 2/3 of the space height of the underground stacking chamber 9, a gravel leveling layer 8 is laid on the bottom surface of the underground stacking chamber 9, a first raft slab layer 7 with the thickness of 0.8m is laid on the upper part of the gravel leveling layer 8, a feeding conveying channel 12 and a discharging conveying channel 13 are respectively arranged on the two sides of the underground stacking chamber 9 after the construction through the underground continuous wall 3 and are respectively communicated with the ground, a material belt conveyor 16 is arranged in each of the feeding conveying channel 12 and the discharging conveying channel 13, and the material belt conveyor 16 extends into the underground stacking chamber 9.

In the embodiment of the double-layer raw material yard structure constructed on a deep soft soil foundation, as shown in fig. 1 and 2, the above-ground piling room 10 comprises side columns 2 on two sides and a material shed 1 erected on the tops of the side columns 2, wherein the side columns 2 are of a reinforced concrete structure, are arranged above an underground continuous wall 3 and are connected with the underground continuous wall 3, and the material shed 1 is of a net rack shell structure. The bottom surface of the ground stacking chamber 10 is composed of a bearing beam 4 and a second raft plate layer 6 paved on the bearing beam 4, the width of the bearing beam 4 is 1.2m, the height of the bearing beam 4 is 1.5m, and the thickness of the second raft plate layer 6 is 0.8 m. The middle part of the ground stacking chamber 10 is provided with a material distribution area 15, support columns 5 are arranged between the ground stacking chamber 10 and the underground stacking chamber 9, two rows of the support columns 5 are arranged and distributed on the bottom surface of the material distribution area 15 at equal intervals, each support column 5 is a cast-in-situ bored pile, and the pile diameter of each support column is 1.2 m. First raft sheet layer 7 and second raft sheet layer 6 all adopt reinforced concrete raft board, are equipped with wide 0.8m, dark 1.0 m's escape canal 14 respectively at first raft sheet layer 7 and 6 both ends of second raft sheet layer, and escape canal 14 adopts reinforced concrete structure.

The construction process of the invention is further explained by combining with specific implementation, the embodiment is to construct a stock yard in a certain area, the stock yard is composed of seven material storehouses such as an iron-making material storeroom, a No. 1-No. 2 blending material storeroom, a No. 1-No. 4 sintering material storeroom and the like, a site stratum is mainly composed of artificial miscellaneous fill, silty clay, silt fine sand and the like, wherein the thickness of the artificial miscellaneous fill layer is 0.3-3.4 m, the thickness of the silty clay is 2.8-8.0 m, and the specific construction steps of the double-layer stock yard structure are as follows:

(1) constructing basement outer walls on two sides of a span of a stock yard respectively: calculating according to the soil pressure to obtain the thickness of the underground continuous wall as 1.2m, namely excavating to the bottom of a soft soil layer, and obtaining the excavating depth as 10.0m, wherein the embedding depth of the underground continuous wall is 2/3 of the excavating depth by using an empirical formula, namely 6.7m, so as to determine the depth of the underground continuous wall as 16.7 m; the underground continuous wall is of a reinforced concrete structure and needs to meet the requirements of standard water resistance, seepage prevention and corrosion prevention; simultaneously, driving a vertical column pile below the reclaimer area, wherein the vertical column pile is a cast-in-situ bored pile, and the diameter of the pile is 1.2 m;

(2) excavating a soil body: the thickness of a reinforced concrete raft plate below a first layer area of a raw material yard structure is 0.8m, a supporting beam is arranged below the raft plate and is 1.2m wide and 1.5m high, so that the construction is facilitated, the reinforced concrete raft plate is firstly excavated to a position 0.5m deep below the first layer raft plate and the supporting beam, a second raft plate layer 6 and the supporting beam at the bottom of an overground material piling room 10 are constructed, the supporting beam is converted into a bearing beam at the later stage, and when the second raft plate layer 6 at the bottom of the overground material piling room 10 is constructed, as shown in figure 3, a plurality of soil taking ports 19 are reserved at equal intervals, so that the underground material piling room 9 can be conveniently excavated;

(3) continuing excavation, performing secondary excavation to a depth of 0.7m below the first raft slab layer 7 on the bottom surface of the underground stacking chamber 9, paving broken stones, leveling, and pouring concrete to construct the first raft slab layer 7;

(4) after the underground piling chamber 9 is dug, a soil taking port 19 reserved on the bottom surface of the underground piling chamber 10 is closed, a strip-shaped foundation pit is dug on the ground on the same side of the feeding direction and the discharging direction of the underground piling chamber 10, an underground continuous wall 3 is constructed firstly, a feeding conveying channel 12 and a discharging conveying channel 13 are constructed, the feeding conveying channel 12 and the discharging conveying channel 13 are both directly led to the underground piling chamber 9 from the ground, conveying belts are installed in the feeding conveying channel 12 and the discharging conveying channel 13 for conveying materials, meanwhile, an artificial up-down channel 11 is constructed by digging the foundation pit on the side surface of the underground piling chamber 10, and the artificial up-down channel 11 is used for entering and exiting in a stair up-down mode, so that the manual up-down operation is convenient;

(5) after the construction of the structure of the stock yard is completed, the materials can be respectively stacked on the first layer structure and the second layer structure, the material distribution and the material taking on the upper layer are shown in figure 4, and the material distribution and taking machine 18 can be driven to the material distribution area 15 to perform the material distribution and taking work; during lower floor's cloth, can unpack the cloth machine apart, carry in underground stacking chamber 9, then assemble, carry out the cloth and get the material, and need reserve the hoist and mount space at the roof of underground stacking chamber 9.

In the embodiment of the double-layer raw material yard structure, the stockpile structure of one layer in the depth direction with two connected spans in the horizontal direction is changed into the stockpile structure of one span in the horizontal direction and two layers above and below in the depth direction, which is equivalent to a basement with one layer built below the ground and is also used for stockpiling. Under the condition of the same stockpiling, the occupied area is saved, the self strength of the foundation soil and the correction of the bearing capacity on the depth are fully utilized, the bearing capacity is greatly improved, various diseases caused by the ground settlement and knot formation are avoided, and the method can be applied to the engineering of constructing a closed large-scale raw material yard on a complex deep soft soil foundation.

The above description is only a detailed description of the specific embodiments of the present invention, and the present invention is not limited thereto, and any modifications, equivalent replacements, improvements, etc. made on the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a be under construction in double-deck raw material yard structure of deep soft soil foundation which characterized in that: the raw material yard structure comprises an underground stacking chamber (9) arranged below the ground, an above-ground stacking chamber (10) arranged above the ground and an artificial upper and lower channel (11) leading to the underground stacking chamber (9), wherein the underground stacking chamber (9) is excavated to the bottom surface of a soft soil layer after an underground continuous wall (3) is constructed below the soft soil layer from the ground, a first raft slab layer (7) is laid on the bottom surface of the underground stacking chamber (9), a feeding conveying channel (12) and a discharging conveying channel (13) are respectively arranged on two sides of the underground stacking chamber (9), and the feeding conveying channel (12) and the discharging conveying channel (13) are respectively led to the ground; the side columns (2) on two sides of the ground stacking chamber (10) are arranged above the underground continuous wall (3) respectively, the material shed (1) is erected at the tops of the side columns (2), the bottom surface of the ground stacking chamber (10) is composed of a bearing beam (4) and a second raft slab layer (6) paved on the bearing beam (4), and a support column (5) is arranged between the ground stacking chamber (10) and the underground stacking chamber (9).

2. The double-layer raw material yard structure constructed on a deep soft soil foundation according to claim 1, characterized in that: first raft sheet layer (7) and second raft sheet layer (6) all adopt reinforced concrete raft board, are equipped with rubble screed-coat (8) in the bottom of first raft sheet layer (7), are equipped with escape canal (14) respectively at first raft sheet layer (7) and second raft sheet layer (6) both ends.

3. The double-layer raw material yard structure constructed on a deep soft soil foundation according to claim 1 or 2, characterized in that: the middle part of the ground stacking chamber (10) is provided with a distribution area (15), the support columns (5) are arranged in two rows and are distributed on the bottom surface of the distribution area (15) at equal intervals, each support column (5) is a cast-in-situ bored pile, and the diameter of the cast-in-situ bored pile is 1.2 m.

4. The double-layer raw material yard structure constructed on a deep soft soil foundation according to claim 1 or 2, characterized in that: the feeding conveying channel (12) and the discharging conveying channel (13) are arranged at the two side positions of the underground stacking chamber (9), material conveying belt conveyors (16) are arranged in the feeding conveying channel (12) and the discharging conveying channel (13), and the material conveying belt conveyors (16) extend into the underground stacking chamber (9).

5. The double-layer raw material yard structure constructed on a deep soft soil foundation according to claim 1 or 2, characterized in that: the underground continuous wall (3) and the side columns (2) are both of reinforced concrete structures, the thickness of the underground continuous wall is 1.2m, the bottom of the underground continuous wall is embedded below the bottom surface of the underground stacking chamber (9), and the embedding depth is 2/3 of the space height of the underground stacking chamber (9); the side columns (2) are connected with the underground continuous wall (3).

6. The double-layer raw material yard structure constructed on a deep soft soil foundation according to claim 1 or 2, characterized in that: the artificial up-down passage (11) is arranged on the side surface of the ground stacking chamber (10) and adopts a staircase form.

7. The double-layer raw material yard structure constructed on a deep soft soil foundation according to claim 1 or 2, characterized in that: the material shed (1) adopts a net rack shell structure.

8. The double-layer raw material yard structure constructed on a deep soft soil foundation according to claim 2, characterized in that: the thickness of first raft sheet layer (7) and second raft sheet layer (6) is 0.8m, and spandrel girder (4) of second raft sheet layer (6) lower part is wide 1.2m, and is high 1.5 m.

9. The double-layer raw material yard structure constructed on a deep soft soil foundation according to claim 2, characterized in that: the drainage ditch (14) is of a reinforced concrete structure, the width of the drainage ditch is 0.8m, and the depth of the drainage ditch is 1.0 m.