Construction method of steel trestle bridge

Abstract

The present application relates to a kind of steel trestle pre-bridge post anchor pile construction method, belong to trestle construction technical field, step one: hoist inserts and hits the steel pipe pile of current one cross trestle, and installs inter-pile connection system and pile cap;Step two: hoist is laid on the pile cap the distribution beam of current one cross trestle, and is installed above the distribution beam Bailey beam and bridge system, and the lateral dimension of bridge system is less than the lateral distance of two steel pipe piles;Step three: hoist is carried out the construction of the steel pipe pile of next cross trestle, connection system, pile cap, distribution beam, Bailey beam and bridge system, using puncher construction current one cross trestle anchor pile, and horizontality sensor uploads the horizontality data of current one cross trestle bridge system when anchor pile construction to control module, and operating personnel judge the progress or interruption according to horizontality data;Step four: repeat the above steps, until the construction of multiple cross trestle is completed, and it is high in construction efficiency, while the influence to trestle itself is small.

Description

Technical Field

[0001] This invention belongs to the field of trestle construction technology, specifically relating to a method for constructing steel trestle bridges by first building the bridge and then anchoring the piles. Background Technology

[0002] With the continuous advancement of infrastructure construction in my country, large bridges spanning waterways are being built more and more frequently. Since construction machinery and materials are difficult to cross the water surface, trestle bridges are required during the construction of bridges spanning waterways. The construction of trestle bridges requires similar steps to the construction of the main bridge, such as driving steel pipe piles into the riverbed and laying a bridge deck system on the steel pipe piles for personnel and equipment to walk on. When laying steel pipe piles, anchor piles are usually driven into the locations of the steel pipe piles to make them more stable.

[0003] However, in general construction methods, the construction sequence is to first drive in anchor piles, then install steel pipe piles at the anchor pile locations, and finally lay the bridge deck system. However, this method is time-consuming. To solve this problem, a common solution, such as the trestle bridge anchorage structure and erection method disclosed in Chinese Patent CN105544375A, includes the following steps: First step: complete all preparatory work for construction; Second step: use a pile driving vessel to hoist the steel pipe piles; Third step: weld the connecting system between adjacent steel pipe piles through connecting joints; Fourth step: erect the crossbeam on the steel pipe piles.

[0004] Step 5: Vertically install the longitudinal beams on the crossbeams; Step 6: Install the bridge deck on the longitudinal beams; Step 7: Use a drilling rig and position it at the upper pipe opening of the steel pipe piles to carry out the anchor pile construction; Step 8: After the anchor pile construction is completed, remove the drilling rig and install the auxiliary facilities, including the railings and streetlights on the bridge deck; This method first uses steel pipe piles, crossbeams, longitudinal beams, and the bridge deck system to initially construct a span of trestle bridge, and then, while constructing the next span of trestle bridge, anchor pile construction is carried out in the steel pipe piles of the constructed span of trestle bridge. This allows the anchor pile construction and trestle bridge construction to proceed simultaneously, reducing construction time and improving construction efficiency. At the same time, by using steel pipe piles for pilot drilling, the pollution to the water area during drilling and pouring is reduced; However, in the above process, during the construction of anchor piles, crossbeams and longitudinal beams are set between the bridge deck system and the steel pipe piles used to support the equipment. In actual construction, due to processing errors and random errors, the crossbeams and longitudinal beams may cause the bridge deck system and the equipment on it to tilt. The equipment on the tilted bridge deck system will be subjected to reaction forces during construction. When the reaction forces act on the bridge deck system and the trestle, under the action of gravity, the bridge deck system and the trestle may tend to slide off the trestle, and there is a probability that the trestle structure itself will tilt further. However, the above scheme does not include a tilt detection step, so it is impossible to detect and stop construction in time when tilting occurs to prevent further tilting. Therefore, a method is needed to ensure construction efficiency while minimizing the impact on the trestle itself, where the steel trestle is constructed first and then the anchor piles are installed. Summary of the Invention

[0005] To address the aforementioned problems in the existing technology, this invention provides a method for constructing steel trestle bridges by first building the bridge and then anchoring the piles, which has the advantage of minimizing the impact on the trestle bridge itself.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A method for constructing a steel trestle bridge by first building the bridge and then anchoring the piles includes the following steps:

[0008] Step 1: The crane drives the steel pipe piles of the current span of the trestle bridge and installs the pile connection system and pile caps;

[0009] Step 2: The crane lays the distribution beam of the current span of the trestle on the pile cap, and installs Bailey beams and bridge deck system on top of the distribution beam. The lateral dimension of the bridge deck system is smaller than the lateral distance between the two steel pipe piles.

[0010] Step 3: The crane will carry out the construction of the steel pipe piles, connecting system, pile cap, distribution beam, Bailey beam and bridge deck system of the next span of the trestle. The drilling rig will be used to construct the anchor piles of the current span of the trestle. The level sensor will upload the level data of the bridge deck system of the current span of the trestle to the control module during the anchor pile construction. The operators will determine whether the construction is in progress or interrupted based on the level data.

[0011] Step 4: Repeat the above steps until the construction of the multi-span trestle bridge is completed.

[0012] As a preferred technical solution of the present invention, step three further includes: the levelness sensor calculates the flatness data P based on several height data h at different positions of the current span of the trestle bridge surface system, and the control module determines whether P is greater than the pre-input flatness threshold P0. When the determination result is yes, the control module issues an alarm to the workers; wherein, P is the variance of several height data.

[0013] As a preferred technical solution of the present invention, step three further includes: the weight sensor uploads the load-bearing data m of the current span of the trestle bridge deck system to the control module; the control module uploads the load-bearing data m to the control module; the control module calculates the coefficient A1 based on the load-bearing data m and the weight reference value m0, and determines whether P is greater than the pre-input flatness threshold A1×P0; when the determination result is yes, the control module issues an alarm to the operator; wherein, A1=m0 / m.

[0014] As a preferred embodiment of the present invention, step two further includes: combining the distribution beam components and the distribution beam connection system to form a distribution beam, and the crane laying the distribution beam of the current span of the trestle on the pile cap.

[0015] As a preferred embodiment of the present invention, step two further includes: setting up construction auxiliary platforms at both ends of the distribution beam.

[0016] As a preferred embodiment of the present invention, step three further includes: the construction crane hoists the drilling rig to the anchor pile construction site; when the first positioner of the drilling rig and the second positioner of the construction crane are aligned, the second positioner sends a signal to the control module; the control module counts the time the second positioner sends a signal per unit time; and the operators determine whether the construction is in progress or interrupted based on the time the signal is sent.

[0017] As a preferred technical solution of the present invention, step three further includes: when constructing the anchor piles of the current span of the trestle bridge using a perforating drilling rig, with the trestle bridge axis as the axis of symmetry, a counterweight is set at a symmetrical position of the construction crane on the bridge deck along the axis of symmetry.

[0018] The beneficial effects of this invention are as follows:

[0019] (1) By uploading the bridge deck height data to the control module in real time during the anchor pile construction process, the control module can calculate the levelness based on the height data, so that the workers can judge whether to continue the project based on the levelness and prevent further tilting.

[0020] (2) By adjusting the judgment criteria for judging whether the flatness exceeds the threshold based on the weight of the equipment on the bridge deck surface, the judgment criteria are raised when the equipment weight is high and further tilting is more likely to occur, making it easier for operators to be aware of the occurrence of tilting. When the equipment weight is low and the probability of further tilting is low, the judgment criteria are lowered, reducing the frequency of reminding operators and ensuring construction efficiency.

[0021] (3) By setting the first locator and the second locator, and sending a signal to the control module when the first locator and the second locator are aligned, the control module counts the signals sent by the control module within a unit time and reminds the operators based on the statistical results. After checking the statistical results, the operators judge whether the construction is proceeding or interrupted, which reduces the probability of steel pipe pile rupture or insufficient anchor pile construction effect caused by the swing of the drilling rig. Attached Figure Description

[0022] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 This is a side view of the construction process of the present invention;

[0024] Figure 2 This is a frontal cross-sectional view of the construction process of this invention;

[0025] Figure 3 This is a top view of the pile cap of the present invention;

[0026] Figure 4 A front view of the beams allocated in this invention;

[0027] Figure 5 This is a block diagram of the control loop of the present invention.

[0028] Explanation of key component symbols:

[0029] In the diagram: 1. Trestle; 11. Bridge deck system; 12. Distribution beam; 13. Bailey beam; 14. Steel pipe pile; 15. Anchor pile; 16. Pile cap; 161. Panel; 162. Stiffening plate; 17. Construction auxiliary platform; 2. Crane; 21. Construction crane; 22. Drilling rig; 3. Control module. Detailed Implementation

[0030] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0031] Please see Figure 1-5A construction method for a steel trestle bridge 1, where the bridge is constructed first and then anchored with piles 15, includes the following steps: Step 1: A crane 2 drives steel pipe piles 14 into the current span of the trestle bridge 1. In this embodiment, the crane 2 drives the steel pipe piles 14 using a "fishing" method. Each span of the trestle bridge 1 has 2 to 3 pairs of steel pipe piles 14. The line connecting two steel pipe piles 14 in each pair is perpendicular to the extension direction of the trestle bridge 1. After the steel pipe piles 14 have penetrated to a certain depth into the ground, a pile connection system is installed. The pile connection system consists of two I-beams parallel to the ground and a vertically spaced connection between the two I-beams. The connecting rods are installed to initially stabilize the steel pipe piles 14 of the current span of the trestle bridge 1. After stabilization, pile caps 16 are installed on the top of the steel pipe piles 14. Specifically, the pile caps 16 are composed of stiffening plates 162 and panels 161. The panels 161 are square, and the center of the square panels 161 has a hollow hole with the same size as the outer diameter of the steel pipe piles 14. At the same time, each pile cap 16 has several stiffening plates 162. Each stiffening plate 162 is vertically installed on the lower surface of the panels 161. The stiffening plates 162 are used to enhance the structural strength of the panels 161. After the installation is completed, step two is performed.

[0032] Step 2: The crane 2 lays the distribution beam 12 of the current span of the trestle bridge 1 on the column cap. In this embodiment, each pair of steel pipe piles 14 corresponds to one distribution beam 12. The longitudinal dimension of the distribution beam 12 is greater than the distance between the two steel pipe piles 14 in the same pair, and the center of the distribution beam 12 is placed at the midpoint of the line connecting the two steel pipe piles 14 in the same pair. The distribution beam 12 is placed above the panel 161 of the pile cap 16. Optionally, the distribution beam 12 is connected to the pile cap 16. Subsequently, Bailey beams 13 are placed on several distribution beams 12 of the current span. The extension direction of Bailey beams 13 is consistent with the extension direction of trestle bridge 1. After the Bailey beams 13 are placed and installed, trestle bridge 1 of the current span has the support capacity at the position covered by bridge deck system 11. At this time, crane 2 places bridge deck system 11 on top of Bailey beams 13. At this time, steel pipe piles 14 support distribution beams 12, distribution beams 12 support Bailey beams 13, and Bailey beams 13 support bridge deck system 11, thus initially completing the construction of trestle bridge 1.

[0033] Specifically, taking the extension direction of the trestle bridge 1 as the longitudinal direction and the direction perpendicular to the extension direction of the trestle bridge 1 and parallel to the ground as the transverse direction, the distribution beam 12, Bailey beam 13 and bridge deck system 11 are all set parallel to the ground. The central axis of the bridge deck system 11 and the midpoint of the line connecting the two steel pipe piles 14 in the same pair of steel pipe piles 14 coincide in the vertical direction, and the transverse dimension of the bridge deck system 11 is smaller than the distance between the two steel pipe piles 14 in the same pair of steel pipe piles 14. At this time, in the vertical direction, the steel pipe piles 14 are located outside the side edge of the bridge deck system 11.

[0034] Then, step three is executed: Crane 2 constructs the steel pipe piles 14, connecting system, column caps, distribution beams 12, Bailey beams 13, and bridge deck system 11 of the next span of trestle bridge 1 using the methods described in steps one and two. During construction, the drilling rig 22 constructs the anchor piles 15 of the current span of trestle bridge 1. Specifically, the construction crane 21 moves along the bridge deck system 11 to the anchor pile 15 construction site and lifts the drilling rig 22. Subsequently, the construction crane 21 lowers the drilling rig... The machine 22 moves to directly above the steel pipe pile 14 and lowers the drilling rig 22. Since the steel pipe pile 14 is located outside the side edge of the bridge deck system 11 in the vertical direction, when the construction crane 21 extends its boom out of the side edge of the bridge deck system 11 to reach above the steel pipe pile 14, there is no obstruction from the bridge deck system 11 when it is lowered. At this time, the drilling rig 22 can enter the steel pipe pile 14 and move down along the internal space of the steel pipe pile 14, eventually moving to the riverbed and completing the drilling construction of the anchor pile 15.

[0035] After step three is completed, proceed to step four: repeat steps one to three until the construction of the multi-span trestle bridge 1 is completed, and anchor piles 15 are installed for the steel pipe piles 14 of each span of trestle bridge 1.

[0036] By setting the spacing between each pair of steel pipe piles 14 to be greater than the lateral dimension of the bridge deck system 11, and by designing the pile caps 16 to be hollow, the construction of the anchor piles 15 of the current span of the trestle bridge 1 can be carried out simultaneously during the construction of the next span of the trestle bridge 1, thereby reducing the construction time.

[0037] In the aforementioned process, to ensure the construction of anchor piles 15 and bridge deck system 11, column caps, distribution beams 12, Bailey beams 13, and bridge deck system 11 were installed on the steel pipe piles 14. However, due to processing errors and random errors, there is a probability that one or more of these structures will not be parallel to the ground after installation, causing the bridge deck system 11 to tilt. The equipment on the tilted bridge deck system 11 will be subjected to reaction forces during construction. When these reaction forces act on the bridge deck system 11 and the trestle bridge 1, they will, under the influence of gravity, cause the bridge deck system 11 and the trestle bridge 1 to tilt. There is a tendency for the bridge to slide off the trestle 1, which may cause the trestle 1 itself to tilt further. However, the above solution does not include a tilt detection step, so it is impossible to detect the impact on the trestle 1 and thus avoid further tilting of the trestle 1. This would result in the construction having a significant impact on the trestle 1 itself. In order to reduce the impact on the trestle 1, during the construction of the anchor pile 15 in step three, the levelness sensor uploads the levelness data of the bridge deck system 11 of the current span of the trestle 1 to the control module 3. The operators judge whether the construction is to proceed or be interrupted based on the levelness data.

[0038] Specifically, the levelness sensor includes several height sensors. These height sensors determine the distance of their respective portions of the bridge deck system 11 from a reference surface. In this embodiment, the reference surface can be a surface perpendicular to the direction of gravity, such as a water surface or the ground. When the bridge deck system 11 is parallel to the reference and is in a horizontal state, the distances of the portions of the bridge deck system 11 where the height sensors are located from the reference surface are equal, and the uploaded data is equal. When the bridge deck system 11 is tilted and forms an angle with the reference surface, the distances of the portions of the bridge deck system 11 where the height sensors are located from the reference surface are not equal, but the uploaded data is still equal. The control module 3 receives the height data from the several height sensors once per second and can determine the levelness of the bridge deck system 11 based on the differences between the several height data. After the determination is completed, the control module 3 can inform the workers of the levelness by projecting it onto a display screen or by radio signal. The workers can then determine whether to continue construction based on the levelness and take measures to adjust the levelness if construction is interrupted.

[0039] By having the level sensor upload the bridge deck height data to the control module 3 in real time during the construction of anchor pile 15, the control module 3 can calculate the levelness based on the height data. This allows the workers to determine whether to continue the project based on the levelness and prevent further tilting.

[0040] During the process of the levelness sensor detecting the levelness of the bridge deck system 11, specifically, several height sensors in the levelness sensor root upload several height data h to the control module 3. The control module 3 calculates the variance of the several height data to obtain the flatness data P. The control module 3 determines whether P is greater than the pre-input flatness threshold P0. When the determination result is yes, the control module 3 issues an alarm to the operator. After receiving the alarm, the operator checks the flatness data and determines whether the construction should continue based on the levelness.

[0041] During the levelness detection of the bridge deck system 11 by the aforementioned levelness sensor, different construction methods for the trestle 1 require construction equipment of varying weights. These different equipment exert different pressures on the trestle 1. When the bridge deck system 11 tilts, heavier equipment exerts a greater force on the bridge deck, making it more prone to further tilting. Conversely, lighter equipment exerts a smaller force on the bridge deck, reducing the probability and extent of further tilting. Therefore, when the equipment on the bridge deck system 11 is heavy, the standard for judging whether the flatness exceeds a threshold needs to be raised to allow for timely intervention from workers even when the flatness deviation is small. Note that when the weight of the equipment on the bridge deck system 11 is relatively small, the judgment standard for whether the flatness exceeds the threshold should be lowered to reduce the alarm frequency to the workers and ensure construction efficiency. To this end, step three also includes: the weight sensor uploads the load-bearing data m of the current span of the trestle bridge 11 to the control module 3. The control module 3 calculates the coefficient A1 based on the load-bearing data m and the weight reference value m0, and judges whether P is greater than the pre-input flatness threshold A1×P0. When the judgment result is yes, the control module 3 issues an alarm to the workers; where A1=m0 / m;

[0042] Specifically, in this embodiment, the weight sensor is a number of sensors distributed on the upper surface of the bridge deck system 11. The number of sensors are electrically connected to the control module 3 and upload pressure data. The control module 3 determines the load data m based on the pressure data, where m0 is a pre-input fixed value.

[0043] When in use, when the value of m increases until it exceeds the value of m0, it means that the weight of the equipment on the current bridge deck system 11 is relatively large, making it easier for the already tilted bridge deck to tilt further. The judgment standard needs to be raised. At this time, the value of A1 = m0 / m decreases, and the value of the flatness threshold A1 × P0 decreases, making it easier for the flatness value P to exceed the flatness threshold A1 × P0. This completes the raising of the judgment standard when the weight of the equipment on the bridge deck system 11 is relatively large. Similarly, when the value of m decreases until it exceeds the value of m0, it means that the weight of the equipment on the current bridge deck system 11 is relatively small, making it less likely for the tilted bridge deck to tilt further. The judgment standard needs to be lowered to reduce the alarm frequency and ensure construction efficiency. At this time, the value of A1 = m0 / m increases, and the value of the flatness threshold A1 × P0 increases, making it less likely for the flatness value P to exceed the flatness threshold A1 × P0. This completes the lowering of the judgment standard when the weight of the equipment on the bridge deck system 11 is relatively large.

[0044] By adjusting the judgment criteria for determining whether the flatness exceeds the threshold based on the weight of the equipment on the bridge deck system 11, the control module 3 can raise the judgment criteria when the equipment weight is high and further tilting is more likely to occur, making it easier for operators to detect the occurrence of tilting. When the equipment weight is low and the probability of further tilting is low, the judgment criteria can be lowered, reducing the frequency of reminders to operators and ensuring construction efficiency.

[0045] In step two, during the construction of the distribution beam 12, the distribution beam 12 is specifically composed of distribution beam components and distribution beam connecting system. In this embodiment, the distribution beam components are two parallel rectangular plate structures. Each rectangular plate distribution beam component is set parallel to the ground. The two distribution beam components are connected by the distribution beam connecting system, and after connection, they form a separate distribution beam 12. At the same time, each pair of steel pipe piles 14 corresponds to one distribution beam 12, and each distribution beam 12 is set on the top surface of the pile cap 16 of the two steel pipe piles 14.

[0046] By setting the distribution beam 12 as a separate distribution beam 12, the construction of the anchor piles 15 on the bridge deck system 11 is further facilitated, and the construction efficiency of the distribution beam 12 is improved.

[0047] In the above scheme, the workers can only stand on the bridge deck to monitor the construction of the anchor pile 15. To facilitate the workers to monitor the construction of the anchor pile 15 from an angle outside the bridge deck, step two also includes: setting up construction auxiliary platforms 17 at both ends of the distribution beam 12. Specifically, since the dimension of the distribution beam 12 in the direction perpendicular to the extension of the trestle 1 is larger than that of the bridge deck system 11, the two ends of the distribution beam 12 are located outside the bridge deck system 11 and have open space. After the Bailey beam 13 is set up, walking passages are set up at both ends of the distribution beam 12. The walking passages constitute the construction auxiliary platforms 17, which facilitates the workers to monitor the construction of the anchor pile 15 from an angle outside the bridge deck.

[0048] In the aforementioned process of first driving in steel pipe piles 14 and then constructing anchor piles 15 within them, the construction crane 21 is needed to extend the drilling equipment into the steel pipe piles 14 from above. Therefore, there is a certain probability that the drilling equipment will swing during construction and hoisting. This swinging could potentially worsen the construction effect of the anchor piles 15, and could also cause them to collide with the inner wall of the steel pipe piles 14, leading to cracking or structural damage. Cracking could cause concrete to leak into the waterway during the pouring of the anchor piles 15, causing pollution. Structural damage could lead to the collapse of the steel pipe piles 14 and the trestle bridge 1. Furthermore, due to the swinging... Since the movement occurs inside the steel pipe pile 14, it is difficult for the workers to observe and know about the swaying. In order to remind the workers when the swaying occurs and to make it easier for the workers to know about the swaying, step three also includes: the construction crane 21 hoists the drilling rig 22 to the construction site of the anchor pile 15. When the first positioner of the drilling rig 22 and the second positioner of the construction crane 21 are aligned, the second positioner sends a signal to the control module 3. The control module 3 counts the time when the second positioner sends a signal per unit time. The workers judge whether the construction is progressing or interrupted based on the time of the signal.

[0049] Specifically, the first locator is a laser emitter, and the second locator is a laser receiver. The laser receiver is configured to receive laser signals emitted towards itself from a conical space whose apex coincides with its own receiving point and is perpendicular to the ground. In this embodiment, the second locator checks whether it has received a signal every 0.05 seconds and sends a signal to the control module 3 when it receives a signal. When the perforating drill 22 swings with a small amplitude and is normally lowered, the second locator continuously receives signals from the first locator and notifies the control module 3. When the perforating drill 22 swings with a large amplitude or deviates from the position of the anchor pile 15, it will cause the first locator to leave the conical space, or cause the first... When the locator is facing other positions, the second locator cannot receive the signal from the first locator, and the control module 3 cannot receive the signal from the second locator. The control module 3 counts the time that the second locator signal is received per unit time and calculates the ratio of the time that the second locator signal is received per unit time. When the ratio is less than a certain value, for example, in this embodiment, the ratio is less than 0.7, it means that the swing causes the punching drill 22 and the first locator to be out of the conical space for a long time and the degree of swing is large. At this time, the control module 3 issues an alarm to remind the operator. The operator can then check the statistical results to know the swing situation and determine whether the construction is to proceed or be interrupted.

[0050] By setting a first locator and a second locator, and sending a signal to the control module 3 when the first locator and the second locator are aligned, the control module 3 counts the signals sent within a unit time and reminds the operators based on the statistical results. After checking the statistical results, the operators can judge whether the construction is progressing or interrupted, which reduces the probability of the steel pipe pile 14 breaking or the anchor pile 15 being insufficient due to the swing of the drilling rig 22.

[0051] When constructing one of the steel pipe piles 14, the crane 2 needs to be positioned on the side of the bridge deck system 11 close to the steel pipe pile 14 being constructed. This results in an imbalance of forces on the bridge deck system 11 and the entire steel trestle 1, which may cause the trestle 1 to tilt. To avoid this situation, step three also includes: when using the drilling rig 22 to construct the anchor pile 15 of the current span of the trestle 1, with the axis of symmetry of the trestle 1 as the axis of symmetry, a counterweight is placed on the bridge deck system 11 at a symmetrical position along the axis of symmetry of the construction crane 21. In this embodiment, the plane perpendicular to the ground and coinciding with the axis of symmetry is taken as the plane of symmetry. When the construction crane 21 is located on one side of the trestle 1 and is ready to construct, a counterweight of equal weight to the construction crane 21 is placed at a symmetrical position on the other side of the plane of symmetry of the construction equipment. At this time, the pressure on both sides of the trestle 1 is equal, reducing the probability of the trestle 1 tilting.

[0052] Working principle and usage process of this invention:

[0053] First, in step one, the crane 2 drives the steel pipe piles 14 of the current span of the trestle bridge 1 and installs the pile connection system and pile caps 16. Then, in step two, the crane 2 constructs the steel pipe piles 14, connection system, pile caps 16, distribution beams 12, Bailey beams 13 and bridge deck system 11 of the current span of the trestle bridge 1. Then, in step three, the drilling rig 22 is used to construct the anchor piles 15 of the current span of the trestle bridge 1. The levelness sensor uploads the levelness data of the bridge deck system 11 of the current span of the trestle bridge 1 to the control module 3 during the construction of the anchor piles 15. The operators determine whether the construction is in progress or interrupted based on the levelness data.

[0054] Finally, repeat the above steps until the construction of the multi-span trestle bridge 1 is completed.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method for constructing a steel trestle bridge by first building the bridge and then anchoring the piles, characterized in that: Includes the following steps: Step 1: The crane drives the steel pipe piles of the current span of the trestle bridge and installs the pile connection system and pile caps; Step 2: The crane lays the distribution beam of the current span of the trestle on the pile cap, and installs Bailey beams and bridge deck system on top of the distribution beam. The lateral dimension of the bridge deck system is smaller than the lateral distance between the two steel pipe piles. Step 3: The crane will carry out the construction of the steel pipe piles, connecting system, pile cap, distribution beam, Bailey beam and bridge deck system of the next span of the trestle. The drilling rig will be used to construct the anchor piles of the current span of the trestle. The level sensor will upload the level data of the bridge deck system of the current span of the trestle to the control module during the anchor pile construction. The operators will determine whether the construction is in progress or interrupted based on the level data. Step 4: Repeat the above steps until the construction of the multi-span trestle bridge is completed; Step three further includes: the levelness sensor calculates the flatness data P based on several height data h at different positions of the current span of the trestle bridge deck; the control module determines whether P is greater than the pre-input flatness threshold P0; if the determination result is yes, the control module issues an alarm to the workers; where P is the variance of several height data. Step three further includes: the weight sensor uploads the load-bearing data m of the current span of the trestle bridge deck system to the control module; the control module uploads the load-bearing data m to the control module; the control module calculates the coefficient A1 based on the load-bearing data m and the weight reference value m0; and determines whether P is greater than the pre-input flatness threshold A1×P0. If the determination result is yes, the control module issues an alarm to the workers; where A1=m0 / m.

2. The construction method for steel trestle bridges by first constructing the bridge and then anchoring the piles, as described in claim 1, is characterized in that: Step two also includes: combining the distribution beam components and the distribution beam connection system to form a distribution beam, and the crane laying the distribution beam of the current span of the trestle on the pile cap.

3. The construction method for steel trestle bridges with pre-construction and subsequent anchor pile installation according to claim 1, characterized in that: Step two also includes setting up construction auxiliary platforms at both ends of the distribution beam.

4. The construction method for steel trestle bridges with pre-construction and post-anchor pile construction as described in claim 1, characterized in that: Step three also includes: the construction crane hoists the percussion drilling rig to the anchor pile construction site, and when the first positioner of the percussion drilling rig and the second positioner of the construction crane are aligned, the second positioner sends a signal to the control module. The control module counts the time the second positioner sends a signal per unit time, and the operators judge whether the construction is in progress or interrupted based on the time of the signal.

5. The construction method for steel trestle bridges by first constructing the bridge and then anchoring the piles, as described in claim 1, is characterized in that: Step three also includes: when using a drilling rig to construct the anchor piles of the current span of the trestle bridge, with the trestle bridge's centerline as the axis of symmetry, counterweights are set at symmetrical positions along the axis of symmetry on the bridge deck system for the construction crane.

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