CN114233384A - Open channel section construction system and method adopting layer-by-layer drainage method - Google Patents
Open channel section construction system and method adopting layer-by-layer drainage method Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 161
- 238000000034 method Methods 0.000 title claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 105
- 239000004576 sand Substances 0.000 claims abstract description 55
- 238000009412 basement excavation Methods 0.000 claims abstract description 45
- 230000037452 priming Effects 0.000 claims abstract description 20
- 230000000903 blocking effect Effects 0.000 claims description 16
- 241000826860 Trapezium Species 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 5
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- 235000017491 Bambusa tulda Nutrition 0.000 claims description 4
- 241001330002 Bambuseae Species 0.000 claims description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 4
- 239000011425 bamboo Substances 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 description 11
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- 230000000694 effects Effects 0.000 description 6
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000000149 penetrating effect Effects 0.000 description 2
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- 238000002360 preparation method Methods 0.000 description 2
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Abstract
The invention discloses a construction system and a method of an open channel section by adopting a layer-by-layer drainage method, wherein the system comprises the following steps: each construction platform that arranges in proper order along the excavation direction, construction platform is the trapezoidal structure of top wide end narrow along horizontal radial direction, and each construction platform arrange highly reduce gradually in order to constitute the hierarchical platform structure of step, and all arrange the multitube self priming pump drainage system that supplies the open trough section drainage on each construction platform, form the inclined plane structure and constitute the open trough section between the entry to the target depth along excavating, the open trough section includes a plurality ofly and the same and construction layer of constructing according to the preface of vertical direction along the hierarchical platform structure quantity. The core thought of the degraded drainage construction system and the degraded drainage construction method for the open channel section construction is that peripheral water flow of open channel excavation is blocked through special construction measures in the excavation process, the construction measures comprise step-by-step drainage and step-by-step excavation until the design excavation size is finally reached, and finally the water content of a sand layer in the open channel outside range is effectively controlled.
Description
Technical Field
The invention relates to the technical field of open channel section construction, in particular to a system and a method for open channel section construction by adopting a layer-by-layer drainage method.
Background
At present, inclined shaft development is mostly adopted for partial mines in the region, the mines are mostly located in desert zones, open trough sections are located in water-bearing sand beds, and a centralized dewatering method or a construction dewatering well method is usually adopted for construction drainage.
In the actual work progress, the staff finds gradually: in the drainage process of the traditional centralized dewatering method or construction dewatering well method, the sand layer group of the open trough section in partial areas is very loose, the consolidation capability is poor, the water permeability is high, the compression performance is high, the strength is low, the stability is crossed, the open trough construction quality is poor, the large-area open trough section sand layer collapse phenomenon often occurs in the construction process, and the actual construction is difficult. In order to improve the construction precipitation method of the open channel section and improve the construction quality of the open channel, the inventor designs a step-by-step drainage construction system and method for the open channel section construction through investigation, demonstration and technical innovation so as to improve the construction quality of the open channel section as much as possible.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a system and a method for constructing the open channel section by adopting a layer-by-layer drainage method, wherein the aim of precipitation and sand fixation is achieved by excavating layer by layer in a layer-by-layer drainage mode in the open channel section construction process, so that the quality of open channel construction is improved, and the low-cost, high-speed, quality-guaranteeing and safety-guaranteeing achievement of the open channel section construction is ensured.
In order to achieve the above object, the present invention provides an open channel segment construction system using a layer-by-layer drainage method, comprising: each construction platform that arranges in proper order along the excavation direction, construction platform is the narrow trapezium structure at wide end in top along horizontal radial direction, each construction platform arrange highly reduce in proper order in order to constitute the hierarchical platform structure of step, and all arrange the multitube self priming pump drainage system who supplies the open trough section drainage on each construction platform, excavate the narrow edge that the entry is located the construction platform of topmost layer, form inclined plane structure and constitute the open trough section to the target depth within a definite time along excavating the entry, the open trough section includes a plurality ofly and the same construction layer of just following the preface construction of vertical direction along the level platform structure quantity. Namely in the system: the construction platform construction, the multi-pipe self-priming pump drainage system drainage and the open channel section construction of the same layer form a construction layer, and the construction of the open channel section is carried out in a layered mode, so that construction teams can finish each construction layer one by one along the excavation direction.
As the further optimization of above-mentioned scheme, multitube self priming pump drainage system includes that the successive layer transversely is a plurality of multitube self priming pumps that the trapezium structure arranged, and a multitube self priming pump is connected with a plurality of suction drainage pipes of going deep into the water-containing sand bed below the construction platform through the pipe divider, and the output of all multitube self priming pumps passes through the drain pipe and with the water log in same drainage assembly. Through connecting a plurality of multitube self priming pumps on a drainage subassembly to realize the simultaneous working of all multitube self priming pumps, in order to realize the continuous drainage on the hydrous sand bed in the open trough section outside.
As a further optimization of the scheme, the multi-pipe self-priming pump drainage system further comprises a water level observation well which is arranged on the construction platform and is convenient for observing the height of the liquid level in the water level observation well in real time. The precipitation effect of the multi-tube self-priming pump can be observed through the water level observation well, and open trench excavation can be carried out if the requirement of excavation precipitation depth is met; on the contrary, the number of the multi-tube self-priming pumps can be increased at proper positions to improve the precipitation effect and ensure the smooth construction of the open trough section.
As a further optimization of the scheme, operation spaces are reserved on each layer of construction platform, and sand blocking piles are arranged on the operation spaces. So as to prevent the quicksand on the side slope above the layer of construction platform from flowing into the bottom of the open trough section.
As a further optimization of the scheme, an operation platform is constructed outside the construction platform on the top layer, a drainage ditch used for placing the output end of the drainage pipe is dug on the operation platform, and the drainage assembly comprises a water pump positioned in the drainage ditch and a water collecting part connected to the output end of the water pump. Because the water collecting part in the construction process of the open channel section is generally a reservoir specified by the first square, and a certain distance is reserved between the reservoir and the open channel section, the invention temporarily drains water through the drainage ditch so as to reduce the use length of a drain pipe connected with the multi-pipe self-priming pump, and only one or two water conveying pipes are connected between the water pump and the water collecting part, thereby greatly saving the construction cost.
A method for constructing an open channel section by adopting a layer-by-layer drainage method comprises the following steps:
s1, constructing a hierarchical platform structure: a plurality of layers of hierarchical platform structures which are gradually reduced along the vertical radial direction layer by layer are built from the excavation inlet from top to bottom along the excavation direction, and the cross section of each hierarchical platform structure is of a trapezoidal structure.
S2, constructing a multi-tube self-priming pump drainage system: a plurality of multi-tube self priming pumps have been arranged along the excavation direction successive layer on hierarchical platform structure, and constitute the trapezium structure with a plurality of multi-tube self priming pumps on layer, every multi-tube self priming pump all is connected with a plurality of suction drainage pipes that are located deep into this layer of hierarchical platform structure below contains water sand layer through the pipe divider, the output of all multi-tube self priming pumps is passed through the drain pipe and is discharged water in same drainage assembly, and multi-tube self priming pump, the pipe divider, suction drainage pipe, drain pipe and drainage assembly constitute multi-tube self priming pump drainage system.
S3, pumping water layer by layer: and draining water layer by layer along the excavation direction through a multi-tube self-priming pump drainage system.
S4, digging downwards layer by layer: and (5) the construction of the open channel section is followed by the step S to sequentially dig downwards layer by layer until the construction of the open channel section is finished.
As a further optimization of the above scheme, the method further comprises:
s5, protection of a sand bed bottom plate: after the construction of the open channel section is finished, a sand blocking and water controlling platform is built on a sand bed bottom plate, and the sand blocking and water controlling platform can be formed by driving one or more of steel pipe piles, bamboo clamping plates and sand bags.
The method has the core thought that peripheral water flow of open groove excavation is blocked through special construction measures in the excavation process, the construction measures comprise step-by-step drainage and step-by-step excavation until the design excavation size is finally reached, finally, the water content of a sand layer in the open groove opening range is effectively controlled, the situation that the side slope is gushed and collapsed due to open groove excavation is avoided, and the open groove construction environment is improved.
As a further optimization of the above scheme, in step S1, after the hierarchical platform structures are constructed, an operation space is reserved on each hierarchical platform structure, and sand blocking piles are buried in the operation space. So as to prevent the quicksand on the side slope above the layer of construction platform from flowing into the bottom of the open trough section.
As a further optimization of the above solution, in step S2, an operation platform is constructed outside the top layer of the hierarchical platform structure, a drainage ditch for placing an output end of a drainage pipe is excavated on the operation platform, and the drainage assembly includes a water pump located in the drainage ditch and a water collecting part connected to the output end of the water pump. Because the water collecting part in the construction process of the open channel section is generally a reservoir specified by the first square, and a certain distance is reserved between the reservoir and the open channel section, the invention temporarily drains water through the drainage ditch so as to reduce the use length of a drain pipe connected with the multi-pipe self-priming pump, and only one or two water conveying pipes are connected between the water pump and the water collecting part, thereby greatly saving the construction cost.
As a further optimization of the above scheme, after the step S3 is completed, before the step S4 is executed, a water level observation well which can facilitate real-time observation of the liquid level height in the water level observation well is opened on the construction platform. The precipitation effect of the multi-tube self-priming pump can be observed through the water level observation well, and open trench excavation can be carried out if the requirement of excavation precipitation depth is met; on the contrary, the number of the multi-tube self-priming pumps can be increased at proper positions to improve the precipitation effect and ensure the smooth construction of the open trough section.
The invention discloses a system and a method for constructing an open channel section by adopting a layer-by-layer drainage method, which have the following beneficial effects:
1) the core thought of the degraded drainage construction system and the degraded drainage construction method for the open channel section construction is that peripheral water flow of open channel excavation is blocked through special construction measures in the excavation process, the construction measures comprise step-by-step drainage and step-by-step excavation until the design excavation size is finally reached, finally, the water content of a sand layer in the open channel outside range is effectively controlled, the situation that the side slope is gushed and collapsed in the open channel excavation process is avoided, and the open channel construction environment is improved.
2) The multi-tube self-priming pump drainage system can realize continuous drainage of all multi-tube self-priming pumps through one drainage structure, and the drainage mode of the multi-tube self-priming pump drainage system is 1m compared with the traditional drainage mode according to actual measurement and calculation3And about 50-90 yuan can be saved, so that the actual drainage cost of open trench excavation is greatly reduced.
There have been disclosed in detail certain embodiments of the invention with reference to the following description and drawings, and it is to be understood that the embodiments of the invention are not limited thereby, but are intended to cover within the spirit and scope of the appended claims, many changes, modifications, and equivalents.
Drawings
Fig. 1 is a schematic view of the overall structure of an open channel section construction system using a layer-by-layer drainage method;
FIG. 2 is a schematic diagram of the overall structure of the hierarchical platform structure according to the present invention;
FIG. 3 is a schematic view of the overall configuration of the multi-tube self-priming pump drainage system of the present invention;
FIG. 4 is a schematic view of the overall structure of the open channel section of the present invention;
fig. 5 is a schematic view of a work flow of a construction method of an open channel section using a layer-by-layer drainage method.
In the figure: 1. a construction platform; 2. a multi-tube self-priming pump drainage system; 3. excavating an inlet; 4. a clear slot section; 5. a water level observation well; 6. an operating space; 7. an operating platform; 21. a multi-tube self-priming pump; 22. a pipe divider; 23. a suction and drainage pipe; 24. a drain pipe; 25. a drainage assembly; 41. constructing a layer; 61. blocking sand piles; 71. a drainage ditch; 251. a water pump; 252. a water collecting part.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.
It should be noted that when an element is referred to as being "disposed on," or provided with "another element, it can be directly on the other element or intervening elements may also be present, when an element is referred to as being" connected, "or coupled to another element, it can be directly on the other element or intervening elements may be present, and" fixedly coupled "means that the element is fixedly coupled in many ways, which are not intended to be within the scope of the present disclosure, the terms" vertical, "" horizontal, "" left, "" right, "and the like are used herein for illustrative purposes only and are not intended to be a single embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification are for the purpose of describing particular embodiments only and are not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items;
referring to the attached drawings 1 of the specification and the attached drawings 3 of the specification, the invention provides a technical scheme that: an open channel segment construction system using a layer-by-layer drainage method, comprising: each construction platform 1 that arranges in proper order along the excavation direction, construction platform 1 is the narrow trapezium structure at the wide end in top along horizontal radial direction, each construction platform 1 arrange highly reduce gradually in order to constitute the hierarchical platform structure of step, and all arrange the multitube self priming pump drainage system 2 that supplies the open channel section drainage on each construction platform 1, excavate the narrow edge that entry 3 is located the construction platform 1 of topmost layer, form inclined plane structure and constitute open channel section 4 along excavating between entry 3 to the target depth, open channel section 4 includes a plurality of and the same and construction layer 41 of constructing according to the preface of vertical direction along the vertical direction of hierarchical platform structure quantity. Namely in the system: the construction platform 1 of the same layer is constructed, the multi-pipe self-priming pump drainage system 2 drains water, the open trough section 4 is constructed to form a construction layer, and the construction of the open trough section 4 is carried out in a layered mode, so that construction teams can finish each construction layer one by one along the excavation direction.
As a further concrete scheme of the scheme, the multi-pipe self-priming pump drainage system 2 comprises a plurality of multi-pipe self-priming pumps 21 which are transversely arranged in a trapezoidal structure layer by layer, one multi-pipe self-priming pump 21 is connected with a plurality of suction and drainage pipes 23 which go deep into a water-containing sand layer below the construction platform 1 through pipe distributors 22, and the output ends of all the multi-pipe self-priming pumps 21 discharge water in the same drainage assembly 25 through drainage pipes 24. By connecting a plurality of multi-tube self-priming pumps 21 to one drainage assembly 25, simultaneous operation of all the multi-tube self-priming pumps 21 is realized, so that continuous and continuous drainage of the water-containing sand layer outside the open trough section 4 is realized.
In order to observe the precipitation effect of the multi-tube self-priming pump 21 conveniently, the multi-tube self-priming pump drainage system 2 further comprises a water level observation well 5 which is arranged on the construction platform 1 and is convenient for observing the height of the liquid level in the water level observation well 5 in real time. If the requirement of excavation dewatering depth is met, open trench excavation can be carried out; on the contrary, the number of the multi-tube self-priming pumps can be increased at proper positions to improve the precipitation effect and ensure the smooth construction of the open trough section.
Considering the condition that the quicksand on the side slope above the layer of the construction platform 1 gushes into the bottom of the open trough section 4, the invention reserves an operation space 6 on each layer of the construction platform 1, and the operation space 6 is provided with a sand blocking pile 61.
For the operation platform 7 constructed outside the construction platform 1 on the top floor, a drainage ditch 71 for placing the output end of the drainage pipe 24 is dug on the operation platform 7, and the drainage assembly 25 comprises a water pump 251 positioned in the drainage ditch 71 and a water collecting part 252 connected to the output end of the water pump 251.
Referring to the accompanying fig. 5, an embodiment of the open channel construction method using a layer-by-layer drainage method is shown as follows:
example 1;
an open slot construction section of a shaft of a certain project auxiliary inclined shaft;
target geological conditions: according to geological data, the excavation water inflow amount of the engineering open groove section is about 255m3/h, the sand layer group of the engineering open groove section is extremely loose, the consolidation capability is poor, the water permeability is high, the compression performance is high, the strength is low, and the stability is crossed.
The construction process comprises the following steps:
due to the characteristics of construction target geology, the traditional centralized dewatering method or construction dewatering well method has the risk of sand layer collapse of a large-area open channel section and cannot meet the construction requirements of the open channel construction section; therefore, the construction method for degrading drainage for open channel construction is adopted, the water content of the sand layer in the outer range of the open channel construction section is controlled, the situation that the slope gushes and collapses due to the open channel opening is avoided, and the open channel construction environment is improved.
The method comprises the following steps of exploring a construction site in detail by terrain and geological conditions, determining the position of an open channel construction section, completing preparation before construction, specifically, before construction, a construction technician carefully carries out safety technology to the constructor according to technical requirements, construction measures, operation requirements, achieved quality standards and safety precautions, and practically implements, and the invention provides the specific construction steps shown in figure 1:
s1, constructing a hierarchical platform structure: a multi-layer level platform structure which is reduced along the vertical radial direction layer by layer is constructed from the top to the bottom along the excavation direction by an excavation inlet, a side slope is connected between the lower edge of the platform on the upper layer and the lower edge of the platform on the lower layer, and the angle of the side slope is less than or equal to 35 degrees.
And the cross section of the hierarchical platform structure is in a trapezoidal structure.
Preferably, after the hierarchical platform structure is constructed in step S1, an operation space 6 is reserved on each hierarchical platform structure, preferably, the operation space in this embodiment is 2.5m, and the sand blocking piles 61 are buried in the operation space 6.
S2, constructing a multi-tube self-priming pump drainage system: a plurality of multi-tube self-priming pumps 21 are arranged on a hierarchical platform structure layer by layer along the excavation direction, and it should be noted that before the multi-tube self-priming pumps 21 are arranged, the static water level line of a sand layer section is detected and the multi-tube self-priming pumps 21 are ensured to be arranged on the static water level line, thereby ensuring the normal drainage of the multi-tube self-priming pump 21, and a plurality of multi-tube self-priming pumps 21 on the same layer form a ladder-shaped structure, each multi-tube self-priming pump 21 is connected with a plurality of water-containing sand layer water suction and drainage pipes 23 through a pipe divider 22, the water suction and discharge pipe can adopt a multi-hole pipe, and one section of the water suction and discharge pipe 23 with flower holes is wrapped by multilayer gauze, so as to avoid the phenomenon of pipe blockage caused by sand suction, the output ends of all the multi-pipe self-priming pumps 21 discharge water into the same drainage assembly 25 through the drainage pipe 24, and the multi-tube self-priming pump 21, the tube separator 22, the suction and drainage pipe 23, the drainage pipe 24 and the drainage assembly 25 form the multi-tube self-priming pump drainage system 2.
As a further specific solution of the above solution, in this embodiment, 40 to 100 multi-tube self-priming pumps are selected.
It should be noted that, in the present invention, the length of the water suction and discharge pipe 23 may be 4 to 12m, the pipe divider 22 is a self-made steel pipe with a length of 2 to 4m, each layer of the hierarchical platform structure is provided with a preformed hole in advance, and the distance between two adjacent preformed holes can be adjusted along with the water amount, if the water amount is large, the distance between two preformed holes can be smaller than 2m, and if the water amount is small, the distance between two preformed holes can be larger than 2m, preferably, the hole opening operation can be performed by using a pile type drilling tool, and the length of the flower hole end of the water suction and discharge pipe 23 penetrating into the preformed hole is generally 2 to 5 m.
Preferably, an operation platform 7 is constructed on the outer side of the top layer of the hierarchical platform structure, a drainage ditch 71 for placing the output end of the drainage pipe 24 is dug on the operation platform 7, and the drainage assembly 25 comprises a water pump 251 positioned in the drainage ditch 71 and a water collecting part 252 connected to the output end of the water pump 251.
S3, pumping water layer by layer: and water is drained layer by layer along the excavation direction through a multi-pipe self-priming pump drainage system 2.
A water level observation well 5 which can facilitate real-time observation of the height of the liquid level in the water level observation well 5 is arranged on the construction platform 1.
S4, digging downwards layer by layer: and the construction of the open groove section 4 is followed by the step S3 of downward digging layer by layer in sequence until the construction of the open groove section 4 is finished.
S5, protection of a sand bed bottom plate: after the construction of the open channel section 4 is finished, a sand blocking and water controlling platform is built on the sand bed bottom plate, and the sand blocking and water controlling platform can be formed by one or more of driving steel pipe piles, supporting bamboo splints and stacking sand bags.
Example 2:
an open slot construction section of a shaft of an auxiliary inclined shaft of a certain project mine;
according to geological data, the length of the open channel section of the construction section sand layer of the embodiment is 180m, the thickness of the open channel section sand layer is 15m, and the water inflow is 80m3/h。
The construction process comprises the following steps:
due to the characteristics of construction target geology, the traditional centralized dewatering method or construction dewatering well method has the risk of sand layer collapse of a large-area open channel section and cannot meet the construction requirements of the open channel construction section; therefore, the construction method for degrading drainage for open channel construction is adopted, the water content of the sand layer in the outer range of the open channel construction section is controlled, the situation that the slope gushes and collapses due to the open channel opening is avoided, and the open channel construction environment is improved.
The method comprises the following steps of exploring a construction site in detail by terrain and geological conditions, determining the position of an open channel construction section, completing preparation before construction, specifically, before construction, a construction technician carefully carries out safety technology to the constructor according to technical requirements, construction measures, operation requirements, achieved quality standards and safety precautions, and practically implements, and the invention provides the specific construction steps shown in figure 1:
s1, constructing a hierarchical platform structure: a multi-layer level platform structure which is reduced along the vertical radial direction layer by layer is constructed from the top to the bottom along the excavation direction by an excavation inlet, a side slope is connected between the lower edge of the platform on the upper layer and the lower edge of the platform on the lower layer, and the angle of the side slope is less than or equal to 35 degrees.
And the cross section of the hierarchical platform structure is in a trapezoidal structure.
Preferably, after the hierarchical platform structure is constructed in step S1, an operation space 6 is reserved on each hierarchical platform structure, preferably, the operation space in this embodiment is 2.5m, and the sand blocking piles 61 are buried in the operation space 6.
S2, constructing a multi-tube self-priming pump drainage system: multiple multi-tube self-priming pumps 21 have been arranged along excavation direction successive layer on hierarchical platform structure, it should be explained that, multi-tube self-priming pump 21 arranges before, it arranges on the hydrostatic line to find the quiet water line of sand bed section and guarantee that multi-tube self-priming pump 21 arranges to guarantee the normal drainage of multi-tube self-priming pump 21, and a plurality of multi-tube self-priming pumps 21 on the same layer constitute trapezium structure, every multi-tube self-priming pump 21 all is connected with the suction drainage pipe 23 on a plurality of contained sand layers through the tube divider 22, suction drainage pipe can adopt porous pipe, and all multi-tube self-priming pumps 21's output passes through drain pipe 24 and discharges water in same drainage module 25, and multi-tube self-priming pump 21, tube divider 22, suction drainage pipe 23, multi-tube 24 and drainage module 25 constitute self-priming pump drainage system 2.
As a further specific solution of the above solution, in this embodiment, 50 to 80 multi-tube self-priming pumps are selected.
It should be noted that each layer of the hierarchical platform structure is provided with a preformed hole in advance, preferably, the hole opening operation can be performed by using a pile drilling tool, and the length of the flower hole end of the water suction and discharge pipe 23 penetrating into the preformed hole is generally 2-5 m.
Preferably, an operation platform 7 is constructed on the outer side of the top layer of the hierarchical platform structure, a drainage ditch 71 for placing the output end of the drainage pipe 24 is dug on the operation platform 7, and the drainage assembly 25 comprises a water pump 251 positioned in the drainage ditch 71 and a water collecting part 252 connected to the output end of the water pump 251.
S3, pumping water layer by layer: and water is drained layer by layer along the excavation direction through a multi-pipe self-priming pump drainage system 2.
A water level observation well 5 which can facilitate real-time observation of the height of the liquid level in the water level observation well 5 is arranged on the construction platform 1.
S4, digging downwards layer by layer: and the construction of the open groove section 4 is followed by the step S3 of downward digging layer by layer in sequence until the construction of the open groove section 4 is finished.
S5, protection of a sand bed bottom plate: after the construction of the open channel section 4 is finished, a sand blocking and water controlling platform is built on the sand bed bottom plate, and the sand blocking and water controlling platform can be formed by one or more of driving steel pipe piles, supporting bamboo splints and stacking sand bags.
And (4) conclusion: it can be seen from the comprehensive embodiment 1 and embodiment 2 that, when the method is adopted in the open trench excavation precipitation construction process, the model of the excavated open trench section is as shown in fig. 4, and as can be seen from fig. 4, the excavated open trench section is of a stepped structure, compared with the open trench section of the traditional straight-cylindrical structure, the method can effectively control the water content of the sand layer outside the open trench section in a hierarchical level, effectively avoid the occurrence of collapse of the courage sand, and obviously improve the construction environment of the open trench section.
It should be understood that the present invention is not limited to the particular embodiments described herein, but is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An open channel segment construction system adopting a layer-by-layer drainage method is characterized by comprising the following steps: each construction platform (1) that arranges in proper order along the excavation direction, construction platform (1) is the narrow trapezium structure at the wide end in top along horizontal radial direction, the hierarchical platform structure of step is reduced in order to constitute in proper order to each highly arranging of construction platform (1), and all arranged on each construction platform (1) and supply the multitube self priming pump drainage system (2) of open groove section drainage, excavate entry (3) and be located the narrow limit of the construction platform (1) of topmost layer, form inclined plane structure and constitute open groove section (4) to the target depth along excavating entry (3), open groove section (4) include a plurality ofly with hierarchical platform structure quantity the same and along construction layer (41) that vertical direction is under construction according to the preface.
2. An open channel segment construction system using a layer-by-layer drainage method according to claim 1, characterized in that: multitube self priming pump drainage system (2) transversely is a plurality of multitube self priming pumps (21) that the trapezium structure arranged including the successive layer, and a multitube self priming pump (21) is connected with a plurality of suction drainage pipe (23) of deepening construction platform (1) below waterlogged sand layer through pipe divider (22), and the output of all multitube self priming pumps (21) passes through drain pipe (24) with the log raft in same drainage assembly (25).
3. An open channel segment construction system using a layer-by-layer drainage method according to claim 2, characterized in that: the multi-pipe self-priming pump drainage system (2) further comprises a water level observation well (5) which is arranged on the construction platform (1) and is convenient for observing the height of the liquid level in the water level observation well (5) in real time.
4. An open channel segment construction system using a layer-by-layer drainage method according to any one of claims 1 to 3, wherein: operation spaces (6) are reserved on each layer of construction platform (1), and sand blocking piles (61) are arranged on the operation spaces (6).
5. An open channel segment construction system using a layer-by-layer drainage method according to claim 4, wherein: an operating platform (7) is constructed outside the construction platform (1) on the top layer, a drainage ditch (71) for placing the output end of the drainage pipe (24) is dug on the operating platform (7), and the drainage assembly (25) comprises a water pump (251) positioned in the drainage ditch (71) and a water collecting part (252) connected to the output end of the water pump (251).
6. A stepwise drainage construction method for construction of an open channel section according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:
s1, constructing a hierarchical platform structure: a plurality of layers of hierarchical platform structures which are gradually reduced along the vertical radial direction layer by layer are built from the excavation inlet from top to bottom along the excavation direction, and the cross section of each hierarchical platform structure is of a trapezoidal structure.
S2, constructing a multi-tube self-priming pump drainage system: multiple multi-tube self-priming pumps (21) are arranged along excavation direction successive layer on the hierarchical platform structure, and multiple multi-tube self-priming pumps (21) on the same layer constitute trapezium structure, every multi-tube self-priming pump (21) all is connected with a plurality of suction and drainage pipes (23) that are located deep into this layer of hierarchical platform structure below contains water sand bed through pipe divider (22), the output of all multi-tube self-priming pumps (21) is passed through drain pipe (24) and is discharged water in same drainage component (25), and multi-tube self-priming pump (21), pipe divider (22), suction and drainage pipe (23), drain pipe (24) and drainage component (25) constitute self-priming pump drainage system (2).
S3, pumping water layer by layer: and water is drained layer by layer along the excavation direction through a multi-pipe self-priming pump drainage system (2).
S4, digging downwards layer by layer: and (5) the construction of the open groove section (4) is sequentially dug downwards layer by layer in the step S3 until the construction of the open groove section (4) is finished.
7. The method for constructing the open channel section by using the layer-by-layer drainage method according to claim 6, wherein: further comprising:
s5, protection of a sand bed bottom plate: after the construction of the open groove section (4) is finished, a sand blocking and water controlling platform is built on the sand bed bottom plate, and the sand blocking and water controlling platform can be formed by one or more of driving steel pipe piles, supporting bamboo splints and stacking sandbags.
8. An open channel segment construction method using a layer-by-layer drainage method according to claim 6 or claim 7, characterized in that: and in the step S1, after the hierarchical platform structure is constructed, reserving an operation space (6) on each hierarchical platform structure, and burying sand blocking piles (61) in the operation space (6).
9. An open channel segment construction method using a layer-by-layer drainage method according to claim 6 or claim 7, characterized in that: in the step S2, an operation platform (7) is constructed outside the top layer of the hierarchical platform structure, a drainage ditch (71) for placing the output end of the drainage pipe (24) is dug on the operation platform (7), and the drainage assembly (25) comprises a water pump (251) positioned in the drainage ditch (71) and a water collecting part (252) connected to the output end of the water pump (251).
10. An open channel segment construction method using a layer-by-layer drainage method according to claim 6 or claim 7, characterized in that: after the step S3 is completed, a water level observation well (5) convenient for real-time observation of the liquid level height in the water level observation well (5) is arranged on the construction platform (1) before the step S4 is performed.
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