CN114233310A - Square culvert jacking construction device, system and method - Google Patents
Square culvert jacking construction device, system and method Download PDFInfo
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- CN114233310A CN114233310A CN202111603674.7A CN202111603674A CN114233310A CN 114233310 A CN114233310 A CN 114233310A CN 202111603674 A CN202111603674 A CN 202111603674A CN 114233310 A CN114233310 A CN 114233310A
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- 238000010276 construction Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title abstract description 26
- 239000002689 soil Substances 0.000 claims abstract description 143
- 238000009412 basement excavation Methods 0.000 claims abstract description 75
- 230000001154 acute effect Effects 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 20
- 230000009471 action Effects 0.000 description 7
- 239000002002 slurry Substances 0.000 description 5
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
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- 238000004364 calculation method Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
- E21D9/0873—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines the shield being provided with devices for lining the tunnel, e.g. shuttering
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
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Abstract
The invention provides a square culvert jacking construction device, a system and a method, which relate to the field of geotechnical engineering and comprise a rectangular tubular jacking body, wherein one end surface of the jacking body is a diagonal plane which forms an acute angle relative to the axial line of the jacking body so as to act on an excavation part to form an inclined tunnel face, the other end surface of the jacking body is provided with a perforated baffle, and a soil bin is formed between the perforated baffle and the diagonal plane; one end of the soil bin close to the inclined plane is provided with a plurality of excavation rollers which are sequentially arranged at intervals; aiming at the problem that the construction of culvert jacking in front of the ground is easy to influence ground facilities, the rectangular tubular jacking body with the inclined plane is arranged to carry out culvert jacking construction, so that a rectangular culvert meeting the requirements of the square culvert is formed, the inclined plane can balance the soil pressure borne by the upper part and the lower part of the front end of the jacking body, the stability of a soil body in the jacking process is ensured, and the settlement or the uplift of the ground is reduced.
Description
Technical Field
The invention relates to the field of geotechnical engineering, in particular to a square culvert jacking construction device, system and method.
Background
In the construction of underground square culvert projects such as a comprehensive pipe gallery, an electric power tunnel, a rainwater box culvert and the like, the situation of crossing roads is often met. If the excavation construction is carried out, not only the trip of people is influenced, but also the process of destroying and recovering roads and related underground pipelines can cause not little economic waste. Secondary diseases such as settlement after construction and the like also have hidden troubles for related structures.
At present, the jacking construction is mostly carried out by adopting a non-excavation technology, the machine head of the pipe jacking machine in the non-excavation technology is mostly circular, the front end surface of the machine head is vertical to the jacking direction, and the cross section shape of the machine head is difficult to adapt to the jacking of a square culvert; in the technological improvement to adaptation square culvert, adopt a plurality of circular pipe push bench to carry out the work area integration, acquire the culvert that can adapt to and hold square culvert, but because the difference of cross sectional shape, the culvert that circular pipe push bench formed is difficult to adapt to and pastes square culvert. In addition, in the jacking process, because the lateral soil pressure at the top and the bottom is different, particularly in the jacking process of a square culvert with a large height, the differential control cannot be carried out, so that the soil body at the top or the bottom of the corresponding jacking front end is easy to damage, the action lining extends to the ground, the sedimentation or the uplift of the ground is caused, and ground facilities are damaged.
Disclosure of Invention
The invention aims to provide a device, a system and a method for square culvert jacking construction, aiming at the defects in the prior art, the rectangular culvert jacking construction meeting the requirements of a square culvert is formed by arranging a rectangular tubular jacking body with a chamfer plane, the chamfer plane can balance the soil pressure borne by the upper part and the lower part of the front end of the jacking body, the stability of a soil body in the jacking process is ensured, and the settlement or the uplift of the ground is reduced.
The invention aims to provide a square culvert jacking construction device, which adopts the following technical scheme:
the soil bin comprises a pushing body in a rectangular tubular shape, wherein one end face of the pushing body is a bevel cut face which forms an acute angle relative to the axis of the pushing body and acts on an excavation part to form an inclined tunnel face, the other end face of the pushing body is provided with a perforated baffle, and a soil bin is formed between the perforated baffle and the bevel cut face; a plurality of excavation rollers which are sequentially arranged at intervals are arranged at one end of the soil bin close to the inclined cutting plane.
Furthermore, the plane of the inclined cutting plane and the pipe wall of the top part of the pushing body form an acute angle when the pushing body works.
Furthermore, the cross section of the pushing body perpendicular to the axis direction is in a rectangular ring shape, and the outer contour of the cross section is consistent with that of a square culvert to be assembled.
Further, all excavation roller axes are arranged in a coplanar manner and are coplanar or parallel to the chamfer.
Furthermore, the outer circumferential surface of the excavation roller is intersected with the plane where the oblique cutting plane is located, and the local outer circumferential surface of the excavation roller extends out of the soil bin.
Furthermore, cutting bulges are arranged on the outer circumferential surface of the excavation roller, and the excavation roller rotates around the axis under the action of the driving piece.
Furthermore, the excavation rollers are respectively matched with driving pieces so as to control the jacking gesture of the pushing body by adjusting the autorotation state of the excavation rollers.
The attitude of box culvert jacking is controlled by adjusting the direction of the excavation roller rotating around the axis under the action of the driving piece, namely one end of the oblique tangent plane of the jacking body is controlled to be upward or downward, and timely deviation correction can be carried out on jacking.
Furthermore, the perforated baffle plate is provided with a power shaft hole, a grouting hole and a soil discharging hole, the power shaft hole is matched with a power shaft, and the power shaft is connected with a disturbance blade positioned in the soil bin.
Furthermore, a soil pressure gauge is installed in the soil bin, and the grouting hole and the soil discharging hole are respectively communicated with the soil bin.
A second object of the present invention is to provide a jacking system for jacking a construction device using a square culvert as described above.
The third purpose of the invention is to provide a square culvert jacking construction method, which utilizes the square culvert jacking construction device, and comprises the following steps:
the pushing body is axially pushed, the excavation roller cuts the front tunnel face and the excavated soil body enters the soil bin;
soil in the soil bin is discharged to the rear of the pushing body through the perforated baffle plate, so that the pushing body moves forwards along the axial direction to form an inclined tunnel face at the front and a rectangular culvert is formed at the rear;
and a square culvert is arranged in the rectangular culvert.
Compared with the prior art, the invention has the advantages and positive effects that:
(1) aiming at the problem that the construction of culvert jacking in front of the ground is easy to influence ground facilities, the rectangular tubular jacking body with the inclined plane is arranged to carry out culvert jacking construction, so that a rectangular culvert meeting the requirements of the square culvert is formed, the inclined plane can balance the soil pressure borne by the upper part and the lower part of the front end of the jacking body, the stability of a soil body in the jacking process is ensured, and the settlement or the uplift of the ground is reduced.
(2) The oblique plane is arranged at the contact position of the front end of the jacking body and the tunnel face, so that the upper end of the oblique plane is positioned in front of the lower end of the oblique plane, the upper end of the oblique plane is firstly contacted with the tunnel face to be excavated, the stability of the soil body in the front along the depth during jacking is considered, the jacking stability of the tunnel face is improved, the stability of the tunnel face and the soil body around the tunnel face is protected, and the influence of jacking on the deformation of the soil body on the ground above is reduced.
(3) The soil body of the front tunnel face is cut and excavated through the excavation roller, the inclined tunnel face is covered by the action face of the excavation roller, the shape of the tunnel face is consistent with that of the cross section of the pushing body, and a rectangular culvert adaptive to the square culvert is formed after pushing excavation, so that the subsequently installed square culvert is matched with the square culvert, and the attachment stability of the square culvert is ensured.
(4) The plurality of excavation rollers are sequentially arranged to cover an excavation face, the action areas of the excavation rollers protrude out of the inclined plane, the excavation rollers capable of rotating around the axis can drive the cutting lugs to contact with the soil body for excavation, jacking resistance is reduced, jacking speed is increased, and construction efficiency is improved.
(5) The soil pressure balance bin is formed inside the pushing body, soil bodies enter the soil bin through the cutting of the excavating roller and form soil quality convenient to output after grouting, and the soil mass is discharged to the outside of the pushing body through the soil outlet hole, so that the discharge of the soil bodies in the front excavating area is completed.
(6) The pushing body is consistent with the outline of the square culvert to be assembled, the pushing body forms the square culvert from the rear in the jacking process, and meanwhile, in the jacking process of the square culvert, the pushing body completely covers the square culvert in the section direction, so that the resistance of the square culvert during jacking is reduced, the construction efficiency is improved, and the influence on the soil body above the square culvert is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic view of a square culvert jacking construction device in embodiment 1 or 2 or 3 of the present invention;
FIG. 2 is a schematic view of the chamfer and the excavating roller in embodiment 1 or 2 or 3 of the present invention;
fig. 3 is a schematic view of the apparatus for square culvert jacking construction according to embodiment 1, 2 or 3 of the present invention;
FIG. 4 is a schematic view of mechanical analysis in the jacking construction process in embodiment 1, 2 or 3 of the present invention;
fig. 5 is a schematic view of the rectangular culvert stressed in the embodiment 1, 2 or 3 of the invention.
In the figure, 1 is a pushing body, 2 is a perforated baffle, 3 is a driving piece, 4 is an excavation roller, 5 is a soil pressure gauge, 6 is a disturbance blade, 7 is a grouting hole, 8 is a soil outlet hole, and 9 is a square culvert.
Detailed Description
Example 1
In an exemplary embodiment of the present invention, a square culvert jacking construction device is provided as shown in fig. 1-5.
As shown in fig. 1-2, the square culvert jacking construction device provided by the embodiment of the invention is suitable for construction of underground square culvert engineering, the rectangular tubular jacking body 1 with the inclined plane is configured, the jacking body 1 is used for carrying out culvert jacking construction, a rectangular culvert meeting the requirement of a square culvert 9 can be formed after jacking, and the inclined plane can balance soil pressure borne by the upper part and the lower part of the front end of the jacking body 1, ensure the stability of soil mass in the jacking process and reduce the settlement or uplift of the ground.
As shown in fig. 1, the square culvert jacking construction device mainly comprises a jacking body 1, a perforated baffle 2 and an excavation roller 4. Wherein the thruster 1 is preferably a rectangular tubular structure as mentioned above and shown in figures 1 and 2; the perforated baffle 2 is arranged at one end of the ejector body 1 and plugs one end of the ejector body 1, the perforated baffle 2 is positioned at the axial rear end of the ejector body 1 according to the working state of the ejector body 1, and holes formed in the perforated baffle 2 can be matched with functional elements to achieve corresponding functions, such as grouting, soil body discharge, power shaft installation and the like. The excavation roller 4 is arranged at one end, far away from the opening baffle 2, of the pushing body 1, and according to the working state of the pushing body 1, the excavation roller 4 is located at the axial front end of the pushing body 1, preferentially contacts with the tunnel face, cuts and excavates the tunnel face, inputs the cut soil body into the pushing body 1, and achieves the purpose that the excavated soil body enables the pushing body 1 to be pushed forwards.
In order to solve the problems of larger resistance and generation of bulge or subsidence to damage facilities on the ground in the traditional pushing process, the soil pressure of the soil body corresponding to the upper part and the soil body corresponding to the lower part of the pushing operation structure in the pushing process is balanced.
For the balancing process, as shown in fig. 3, according to the mohr coulomb strength theory, when the soil unit body is in shear failure, i.e. the shear stress on the failure surface reaches its maximum shear strength, the soil body reaches the ultimate balance state. In the pipe jacking project, one soil body unit in the jacking direction is taken for analysis. In the initial state, the soil body above the soil bodyThe direction of gravity of (a) is the principal stress direction and can be defined as sigma1The lateral earth pressure around the earth is from1The lateral soil pressure is multiplied by the lateral soil pressure coefficient to be sigma2When the square culvert 9 is pushed in, the lateral soil pressure along the pushing direction begins to decrease after entering a certain interval, and becomes sigma3With further jacking, σ3Further decrease, when σ is present3When the intensity is small to a certain degree, the ultimate balance state of the soil is reached, namely the Moire stress circle tangent of the soil body and the shear strength envelope line of the soil are reached, at the moment:
as shown in the combined figure 4, the angle between the damaged surface of the soil and the horizontal plane is
For the underground excavation work, as shown in FIG. 5, the top and bottom of the jacking work are due to σ1Different (theoretical calculation values are respectively sigma)11Rh and σ12R (h + Δ h)), so σ when the soil reaches the limit equilibrium state3Is also different (σ)31≠σ32) However, when the traditional earth pressure balance push bench is pushed, the top and the bottom of the pushing force are the same (sigma)31＝σ32) The difference adjustment cannot be performed on the division, so that the earth pressure balance push bench top has certain sedimentation or uplift risks.
In this embodiment, the front end of the pushing body 1 contacting the tunnel face is set to just solve the above problem, the end face of the pushing body 1 located at the axial front end when the pushing body 1 works is a chamfered face, the chamfered face and the axis of the pushing body 1 are arranged to form an acute angle, the chamfered face combines with the excavation roller 4 to act together on the tunnel face to form an inclined tunnel face, and the tunnel face and the bottom face of the formed rectangular culvert form an obtuse angle.
It can be understood that the inclined plane is obliquely arranged, and the plane where the inclined plane is located and the top pipe wall of the pushing body 1 during working form an acute angle, so that the upper end of the inclined plane is located in front of the lower end of the inclined plane, the upper end of the inclined plane is firstly contacted with an excavation tunnel face, the stability of the soil body in front of the pushing body along the depth is considered, the pushing stability of the soil body is improved, the tunnel face and the soil body around the tunnel face are protected to be stable, and the influence of the pushing on the deformation of the soil body on the ground above is reduced.
As shown in fig. 1, in the present embodiment, taking a state when the pushing body 1 performs pushing operation axially and horizontally as an example, at this time, the top surface and the bottom surface of the pushing body 1 are both in a horizontal state, and the chamfer surface is located between the top surface and the bottom surface of the pushing body 1, in this state:
the included angle between the top surface of the pushing body 1 and the inclined plane
With reference to FIG. 3, the sealing pressure is now set to σ3For the soil body unit A, the soil body pressure is sigma3For the soil body unit B, the soil pressure is sigma3+ Δ σ (lateral soil pressure generated by the soil on the left side of cell B), which is safe for both soil cells a and B.
As shown in fig. 1 and 2, the cross section of the pushing body 1 perpendicular to the axial direction is rectangular ring-shaped, the area forming the rectangular ring-shaped cross section does not include the area of the pushing body 1 corresponding to the chamfer, and the cross section of the area corresponding to the chamfer perpendicular to the axial direction is concave with an opening facing downwards so as to correspond to the chamfer arranged obliquely relative to the axial line of the pushing body 1.
The front end of the pushing body 1 maintains the soil pressure balance of the upper part and the lower part of the excavation area, and the position of the pushing body 1 contacting the tunnel face is used for cutting and excavating soil by installing an excavation roller 4.
Specifically, a soil bin is formed in an inner cavity of the pushing body 1 between the perforated baffle 2 and the oblique plane and can contain soil entering from the front end of the pushing body 1, and a plurality of excavation rollers 4 which are sequentially arranged at intervals are arranged at one end of the soil bin close to the oblique plane; as shown in fig. 1 and 2, the axes of the excavating rollers 4 are arranged in a coplanar manner, and in order to adapt to the trend of the inclined planes and meet the requirement of forming the inclined tunnel face, the axes of all the excavating rollers 4 are arranged in a coplanar or parallel manner with the inclined planes.
When the axis of the excavation roller 4 and the oblique plane are distributed in a coplanar manner, half of the excavation roller 4 is positioned in the soil bin, and the other half of the excavation roller is positioned outside the soil bin and faces the tunnel face.
It can be understood that when the axis of the excavation roller 4 is arranged parallel to the oblique plane, in order to meet the requirements of excavating soil and making the soil enter the soil warehouse, the outer circumferential surface of the excavation roller 4 intersects with the plane of the oblique plane, and the partial outer circumferential surface of the excavation roller 4 extends out of the soil warehouse. The outer circumferential surface of the excavation roller 4 positioned outside the soil bin can cut soil on the tunnel face, so that soil is excavated, and the soil is conveyed into the soil bin along with the rotation of the excavation roller 4.
The excavation rollers 4 need to be matched with the jacking speed in the working process, in order to meet the requirement of the excavation rollers 4 on the soil body excavation efficiency, cutting protrusions are arranged on the outer circumferential surfaces of the excavation rollers 4, the excavation rollers 4 rotate around the axis under the action of the driving piece 3, each excavation roller 4 can move independently, and all the excavation rollers 4 can also move simultaneously, when all the excavation rollers 4 rotate, a cutting surface is formed at the contact position of the excavation rollers 4 and the soil body on the tunnel face, the jacking resistance is reduced, and the excavation efficiency of the soil body in the jacking process is guaranteed.
The driving piece 3 can be a hydraulic motor, or a structure that the electric motor is matched with a speed reducer can be adopted, and in other embodiments, a required torque output element can be selected according to requirements and connected with the excavation roller 4.
It should be noted that, when the excavation rollers 4 are arranged, the excavation rollers can be arranged in parallel with the axes of the adjacent excavation rollers 4 at equal intervals, or the axes of the adjacent excavation rollers 4 can be arranged to form an included angle. When adjacent excavation rollers 4 are arranged at an included angle, trapezoidal channels with different widths at two ends are formed between the adjacent excavation rollers 4, the trapezoidal channels in the same state are sequentially arranged at intervals, the widths corresponding to the same ends of the adjacent trapezoidal channels are different, and the widths corresponding to the different ends are equal.
Through forming the trapezoidal announcement of special distribution and supplying the soil body process, improve the trafficability characteristic between excavation roller 4, when having avoided equidistant parallel arrangement excavation roller 4, bulky soil block is blocked the unable problem that passes through between adjacent excavation roller 4, and the width at every trapezoidal passageway both ends varies for bulky lug can remove big width one end gradually under the effect of excavation roller 4, thereby gets into in the soil storehouse from the big width one end of trapezoidal passageway.
The excavation device comprises a driving part, a driving part and a driving part, wherein the driving part is arranged on each excavation roller; the excavation speed can be changed by adjusting the excavation roller, and different stress states of the inclined cutting surface can be realized by regulating the direction, the speed difference and the working time of the excavation roller, so that the jacking posture of the jacking body is controlled.
The attitude of box culvert jacking is controlled by adjusting the direction of the excavation roller rotating around the axis under the action of the driving piece, namely one end of the oblique tangent plane of the pushing body is controlled to be upward or downward, the trend of the box culvert can be actively adjusted, and the jacking can be timely corrected.
As shown in fig. 1, for the matched elements in the soil bin, the perforated baffle 2 is provided with a power shaft hole, a grouting hole 7 and a soil outlet hole 8, a soil pressure gauge 5 is installed in the soil bin, and the grouting hole 7 and the soil outlet hole 8 are respectively communicated with the soil bin; the power shaft hole is matched with a power shaft, and the power shaft is connected with a disturbance blade 6 positioned in the soil bin to disturb soil entering the soil bin; the grouting holes 7 can be matched with external slurry supply equipment, so that slurry is input into the soil bin, the mobility of soil in the soil bin is improved, the soil is conveniently output from the soil outlet holes 8, the pressure in the soil bin can be maintained, and the soil pressure balance is realized; the soil outlet hole 8 is used for being matched with external conveying equipment, such as a spiral conveyor and the like, and can output soil in the soil bin to the outside of the soil bin and discharge the soil out of the culvert.
The soil pressure balance bin is formed inside the pushing body 1, soil bodies are cut by the excavating rollers 4 to enter the soil bin, soil quality convenient to output is formed after grouting, and the soil bodies are discharged to the outside of the pushing body 1 through the soil outlet holes 8, so that the soil bodies in the front excavating area are discharged.
Example 2
In another embodiment of the present invention, a jacking system is provided, as shown in fig. 1-5.
The jacking system utilizes the square culvert jacking construction device as described in embodiment 1, and the jacking main body of the jacking system is connected with the square culvert jacking construction device.
It can be understood that, referring to the embodiment 1, the jacking system further comprises a jacking mechanism, a slurry supply device and a conveying device, and the grouting holes 7 are matched with the slurry supply device so as to input slurry into the soil bin; go out soil hole 8 and be used for cooperating conveying equipment, can export the soil body in the soil storehouse outside the soil storehouse, in this embodiment, conveying equipment can select for use screw conveyer etc..
The jacking system can also drive the square culvert 9 to abut against the jacking body 1, and apply jacking force to the jacking body 1 through the square culvert 9, so that the jacking body 1 advances along the working direction.
It will be appreciated that the power source for the drive 3 may be arranged in the jacking body of the jacking system in correspondence with the drive 3 of the excavation roll 4.
For other components of the jacking system, the existing jacking equipment components can be adopted, and adaptive adjustment is carried out according to requirements to meet construction requirements.
The outer contour of the pushing body 1 is consistent with that of the square culvert 9 to be assembled, the pushing body 1 forms a square culvert from the rear in the pushing process, meanwhile, in the process of pushing the square culvert 9, the pushing body 1 completely covers the square culvert 9 in the section direction, the resistance of the square culvert 9 in the pushing process is reduced, the construction efficiency is improved, and the influence on the soil body above is reduced.
Example 3
In another embodiment of the invention, as shown in fig. 1-5, a square culvert jacking construction method is provided.
The square culvert jacking construction method utilizes the square culvert jacking construction device as described in embodiment 1, and adopts the following steps:
the pushing body 1 is pushed axially, the excavation roller 4 cuts the front tunnel face and enables the excavated soil body to enter the soil bin;
soil in the soil bin is discharged to the rear of the pushing body 1 through the perforated baffle 2, so that the pushing body 1 moves forwards in the axial direction to form an inclined tunnel face in the front and a rectangular culvert is formed in the rear;
the square culvert 9 is arranged in the rectangular culvert, and the multiple sections of square culverts 9 are sequentially abutted along the axial direction to form the required underground square culvert engineering.
The method for jacking the square culvert 9 is adaptively adjusted according to site construction conditions and by combining the embodiment 1, so that the problem of ground settlement or uplift in the construction process is reduced, the construction safety is improved, and ground facilities are protected.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A square culvert jacking construction device is characterized by comprising a rectangular tubular jacking body, wherein one end face of the jacking body is a diagonal plane which is acute-angled relative to the axial line of the jacking body so as to act on an excavation position to form an inclined tunnel face, the other end face of the jacking body is provided with a perforated baffle, and a soil bin is formed between the perforated baffle and the diagonal plane; a plurality of excavation rollers which are sequentially arranged at intervals are arranged at one end of the soil bin close to the inclined cutting plane.
2. The apparatus according to claim 1, wherein the plane of the chamfer is at an acute angle to the wall of the top pipe when the thruster is in operation.
3. The square culvert jacking construction device of claim 1, wherein the cross section of the jacking body perpendicular to the axial direction is in a rectangular ring shape, and the outer contour of the cross section is consistent with that of a square culvert to be assembled.
4. The apparatus of claim 1, wherein all of the excavation roller axes are arranged coplanar and coplanar with or parallel to the chamfer plane.
5. The apparatus of claim 4, wherein the outer circumference of the excavating roller intersects the plane of the chamfer and a portion of the outer circumference of the excavating roller extends outside the earth container.
6. The apparatus of claim 1, wherein the excavating roller has cutting projections formed on an outer circumferential surface thereof, and the excavating roller is rotated about the axis by the driving member.
7. The square culvert jacking construction device of claim 1, wherein the perforated baffle plate is provided with a power shaft hole, a grouting hole and a soil discharging hole, the power shaft hole is matched with a power shaft, and the power shaft is connected with a disturbance blade positioned in the soil bin.
8. The square culvert jacking construction device of claim 7, wherein a soil pressure gauge is installed in the soil bin, and the grouting hole and the soil discharging hole are respectively communicated with the soil bin.
9. A jacking system including a square culvert jacking construction apparatus as claimed in any one of claims 1 to 8, the jacking body of the jacking system being connected to the square culvert jacking construction apparatus.
10. A square culvert jacking construction method using the square culvert jacking construction device according to any one of claims 1 to 8, comprising the steps of:
the pushing body is axially pushed, the excavation roller cuts the front tunnel face and the excavated soil body enters the soil bin;
soil in the soil bin is discharged to the rear of the pushing body through the perforated baffle plate, so that the pushing body moves forwards along the axial direction to form an inclined tunnel face at the front and a rectangular culvert is formed at the rear;
and a square culvert is arranged in the rectangular culvert.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111603674.7A CN114233310A (en) | 2021-12-24 | 2021-12-24 | Square culvert jacking construction device, system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111603674.7A CN114233310A (en) | 2021-12-24 | 2021-12-24 | Square culvert jacking construction device, system and method |
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| CN114876471A (en) * | 2022-07-05 | 2022-08-09 | 中铁四局集团有限公司北京分公司 | Pipe jacking construction method for waterless sand layer |
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