CN104878774B - Movable cofferdam open-cutting method - Google Patents

Abstract

The present invention is a mobile cofferdam open excavation method, comprising the following steps: 1), forming a weir body; 2), digging out the soil in the construction body (1), and building a tunnel; 3), dismantling the demolition body (2); 4), constructing a new structure (3); 5), repeating steps 2) to 4) until the tunnel construction is completed; the steps 2), 3), and 4) can also be carried out synchronously, in no particular order. The advantages of the present invention: using the mobile cofferdam open excavation method described in this application can shorten the construction period; reduce construction costs; do not affect the passage of air routes in wide waters; can realize long-distance and ultra-long-distance tunnel construction; the excavation area is more Small, less excavated earthwork, less impact on the environment.

Description

Mobile cofferdam open cut method

technical field

The invention relates to a mobile cofferdam open-cut method that can be used in tunnel construction, and belongs to the technical field of tunnel construction.

Background technique

Existing tunnel construction usually takes a long construction period, costs a lot, and has a great impact on the environment. Therefore, shortening the construction period, reducing construction costs, improving the construction environment, and reducing environmental impact have always been urgent problems in the tunnel industry.

The existing tunnel construction methods include: cofferdam open cut method, pipe jacking method, Xinao method, immersed pipe method, shield method, etc.

The cofferdam open cut method, as shown in Figure 1, uses multi-level sheet piles to isolate water and soil. The sheet piles are arranged in a ladder shape, and horizontal supports are used between the sheet piles on both sides of the tunnel to withstand the impact of water and soil on the sheet piles. horizontal force. This kind of cofferdam method usually adopts the method of pouring on site, which is cumbersome to construct, has a long maintenance period, occupies a large area, and has a great impact on the environment. When excavating a lake bottom tunnel, the cofferdam open cut method is to dig from both sides to the middle, and the excavated soil is transported in a large amount, and the excavated soil needs to be accumulated in a large land area.

The pipe jacking method is a kind of underground excavation construction method. The disadvantages of this method are large diameter, super long jacking, difficulty in deviation correction, and it is only suitable for small linear tunnels.

The new Austrian method is a construction method that uses blasting technology to excavate the entire section under the premise of utilizing the bearing capacity of the surrounding rock itself. The new Austrian method is only suitable for building tunnels in rocks.

The immersed tube method is to transport a section of the tunnel to the installation place through the water surface, and place it one by one in the dredged foundation trench. The immersed tube method is to carry out underwater operations on the water platform, which is difficult to construct and greatly affected by the environment. , and it is necessary to build a very large prefabricated yard on the shore, which is expensive.

The advantage of the shield method is that the shield machine excavates tunnels in the lower part of the underground pipe network, which theoretically will not damage the underground pipe network and will not affect traffic. However, in reality, because urban subway tunnels usually build a platform at intervals, the open-cut method must be carried out when building the platform, so the shield method still affects traffic. When excavating an underwater tunnel, the start of the shield method is on land, and the excavated soil is transported in a large amount, and the excavated soil needs to be accumulated in a large land area.

Contents of the invention

The present invention proposes a mobile cofferdam cut-and-cover method that can be used in tunnel construction. Its purpose is to overcome the above-mentioned defects in the prior art, and to solve the technology of how to build tunnels in shallow water, land, or medium and deep water conditions. difficult problem, realize many advantages of the present invention.

Technical solution of the present invention: mobile cofferdam cut-and-cover method, it is characterized in that this method comprises the steps:

1), to form a weir body;

2) Excavate the soil in the construction body to build the tunnel;

3) Dismantling the demolition body;

4) Build a new structure;

5) Steps 2) to 4) are repeated until the tunnel construction is completed; the steps 2), 3) and 4) can also be carried out synchronously in no particular order.

The advantages of the present invention: the present invention can shorten the construction period; reduce the construction cost; it does not affect the passage of the airway in wide waters; it can realize long-distance and ultra-long-distance tunnel construction, the excavation area is smaller, and the amount of earthwork excavated is less. Environmental impact is small.

Description of drawings

Fig. 1 is the sectional view of the weir body of the existing cofferdam open cut method.

Fig. 2 is a schematic diagram of the mobile cofferdam open cut method during construction.

Fig. 3 is a sectional view of E-E in Fig. 2 .

Fig. 4 is a top view of the weir after being enclosed.

Figure 5.1 is the axial side view after the weir body is enclosed.

Figure 5.2 is a schematic diagram of the state after the I-shaped sheet pile 4 at the left end of the demolition body 2 is pulled out.

Figure 5.3 is a schematic diagram of the state after pulling out the B profiled end face partition 6b and the Type II sheet pile 7 at the left end of the demolition body 2.

Figure 5.4 is to put the B profiled end face partition 6b into the type II sheet pile 7 between the rear section 1-1 of the construction body and the front section 1-2 of the construction body, and the rear section 1-1 of the construction body becomes a new demolition body 2 state diagram.

Figure 5.5 is a schematic diagram of the state in which the front end of the construction body 3 is pressed into the I-shaped sheet pile 4.

Figure 5.6 shows the A full-face partition 5a in the type II sheet pile 7 between the construction body 3 and the front section 1-2 of the construction body being pulled out. The front section 1-2 of the original construction body becomes the rear section 1-1 of the construction body. Body 3 becomes a schematic diagram of the state of the front section 1-2 of the new construction body.

Figure 6 is a front view of Type I sheet pile.

Figure 7 is a top view of Type I sheet pile.

Fig. 8 is a partial enlarged view of A in Fig. 7 .

Fig. 9 is a side view of Type I sheet pile.

Fig. 10 is an axial side view of Type I sheet pile.

Figure 11 is the force diagram of Type I sheet pile.

Fig. 12 is a schematic diagram of the first splicing unit.

Fig. 13 is a schematic diagram of the second splicing unit.

Fig. 14 is an axial side view of type II sheet pile.

Fig. 15 is a top view of Type II sheet pile.

Fig. 16 is a partial enlarged view of B in Fig. 15 .

Fig. 17 is a side view of Type II sheet pile.

Fig. 18 is a force diagram of type II sheet piles with full-face partitions 5 or profiled-face partitions 6.

Fig. 19 is a top view of Type II sheet piles with full-face partitions 5 or profiled-face partitions 6.

Fig. 20 is a partial enlarged view at point C in Fig. 19 .

Fig. 21 is a front view of Type II sheet pile with a full-face partition 5.

Fig. 22 is a front view of Type II sheet pile with profiled end face partition 6.

FIG. 23 is a front view of the full-face partition 5 .

FIG. 24 is an isometric view of the full-face partition 5 .

FIG. 25 is a front view of the profiling end face partition 6 .

Fig. 26 is a bottom view of a full-section partition 5 or a profiled end partition 6.

Fig. 27 is a partial enlarged view at D in Fig. 26 .

Fig. 28 is a front view of the sheet pile transfer trolley 8.

Fig. 29 is a schematic diagram of a sheet pile transfer trolley 8 carrying a type I sheet pile 4 or a type II sheet pile 7.

Fig. 30 is a bottom view of sheet pile transfer trolley 8.

Fig. 31 is a schematic diagram of the structural position of the first and second wheel sets in the sheet pile transfer trolley 8.

FIG. 32 is a partially enlarged schematic view of FIG. 31 .

Fig. 33 is a schematic diagram of the structural positions of the third and fourth wheel groups in the sheet pile transfer trolley 8.

FIG. 34 is a partially enlarged schematic view of FIG. 33 .

FIG. 35 is a front view of the end face partition lifting trolley 9 .

FIG. 36 is a side view of the end face partition lifting trolley 9 .

FIG. 37 is a front view of the end-to-tail pile extractor 10 .

FIG. 38 is a side view of the end-to-tail pile extractor 10 .

FIG. 39 is a side view of the end pile driver 11 .

FIG. 40 is a front view of the pile driver 11 at the end.

FIG. 41 is a front view of the case body 13 .

FIG. 42 is a top view of the box body 13 .

Fig. 43 is a plan view of the weir body formed in the open and cut method of the submerged cofferdam.

Fig. 44 is a cross-sectional view of F-F in Fig. 43 .

Fig. 45 is a front view of the weir body enclosed in the open and cut method of the submerged cofferdam.

Fig. 46 is a schematic diagram of the initial state of dismantling the demolition body 2 in the open and cut method of the submerged cofferdam.

Fig. 47 is a schematic diagram of the isolation state of the construction body 1 and the demolition body 2 in the submerged cofferdam open cut method.

Fig. 48 is a schematic diagram of the state of lowering the A full-face partition 5a and B full-face partition 5b on both sides of the demolition body 2 and lifting the profiling end face partition 6 on the left side of the demolition body 2 in the submerged cofferdam open cut method.

Fig. 49 is a schematic diagram of the state in which the demolition body 2 is gradually pulled out in the open and cut method of the submerged cofferdam.

Fig. 50 is a force diagram during the floating process of the demolition body 2.

Fig. 51 is a schematic diagram of the state after the removal body 2 is pulled out in the submerged cofferdam body.

FIG. 52 is a schematic diagram of the initial state of constructing the structure 3 .

Fig. 53 is a schematic diagram of the structure 3 after sinking.

FIG. 54 is a cross-sectional view of FIG. 53 .

FIG. 55 is a schematic diagram of the pressure on the construction body 3 .

Fig. 56 is a schematic diagram of the construction body 3 after being pressed into the soil.

Fig. 57 is a schematic diagram of a construction body 3 changing into a new construction body 1.

FIG. 58 is a schematic diagram of the structural composition of the modular tunnel 14.

In the figure, 1 is the construction body, 1-1 is the rear section of the construction body, 1-2 is the front section of the construction body, 2 is the demolition body, 3 is the construction body, 4 is type I sheet pile, 4-1 is the load-bearing body, 4- 2 is auxiliary sheet pile, 4-3 is sheet pile, 4-4 is supporting beam, 4-5 is walking track, 4-6 is hinge buckle, 4-7 is installation groove, 4-8 is the first filling area, 4-9 is a hinged buckle, 5 is a full-face partition, 5-1 is a partition, 5-2 is a rectangle, 5-3 is a second filling area, 6 is a profiled end partition, 6-1 is a partition, 6- 2 is a rectangular body, 6-3 is a profiling edge, 7 is a type II sheet pile, 8 is a sheet pile transfer trolley, 8-1 is a transfer frame, 8-2 is a sheet pile support, 8-3 is a traveling wheel, 8-3-1 is the first round, 8-3-2 is the second round, 8-3-3 is the third round, 8-3-4 is the fourth round, 8-3-5 is the The fifth wheel group, 8-3-6 is the sixth wheel group, 8-3-7 is the seventh wheel group, 8-3-8 is the eighth wheel group, 8-4 is the gap, and 9 is the end partition lifting trolley , 9-1 is the partition pulling and pressing device, 9-2 is the frame, 9-3 is the running wheel of the end face partition lifting trolley, 9-4 is the bottom support of the end face partition lifting trolley, 10 is the end and tail pile pulling machine, 10-1 10-2 is the pile pulling device, 10-3 is the traverse device, 10-4 is the walking wheel of the end-tail pile pulling machine, 10-5 is the bottom support of the end-tail pile pulling machine, and 11 is the end Pile press machine, 11-1 is the pile press frame, 11-2 is the pile press device, 11-3 is the dredging and leveling device, 11-4 is the driving wheel of the end pile press machine, 11-5 is the end pile press Machine bottom support, 11-6 is hoisting traverse device, 12 is side partition, 13 is box body, 13-1 is cabin body, 13-2 is left end partition, 13-3 is right end partition, 13-4 is partition lifting Device, 13-5 is a closed cavity, 14 is a modular tunnel, 14-1 is the left part of the cavity, 14-2 is the right part of the cavity, 14-3 is the bottom plate of the cavity, 14-4 is the middle wall, 14- 5 is a left cover, 14-6 is a right cover, 14-7 is a middle cover, and 14-9 is a horizontal partition.

detailed description

The mobile cofferdam open cut method includes the following steps:

1), to form a weir body;

2) Excavate the soil in the construction body 1 to build the tunnel;

3), remove the demolition body 2;

4), build a new structure 3;

5) Steps 2) to 4) are repeated until the tunnel construction is completed; the steps 2), 3) and 4) can also be carried out synchronously in no particular order.

When using the mobile cofferdam open cut method to construct a tunnel, the state of the weir body may include: ①, construction body 1 and demolition body 2, ②, construction body 1 and construction body 3, ③, construction body 1, demolition body 2 and construction object 3, that is, demolition object 2 and construction object 3 do not necessarily exist at the same time.

The two sides of construction body 1, demolition body 2 and construction body 3 are side partitions 12,

Between the construction body 1 and the demolition body 2 is an A profiled end face partition 6a, and between the construction body 1 and the construction body 3 is an A full end face partition 5a;

The construction body 1 is surrounded by side partitions 12, A full end face partition 5a and A profiled end face partition 6a;

The construction body 1 includes a rear section 1-1 of the construction body and a front section 1-2 of the construction body, between the rear section 1-1 of the construction body and the front section 1-2 of the construction body is a Type II sheet pile 7, and the side partition 12 is composed of Several I-type sheet piles 4 and/or II-type sheet piles 7 are spliced together;

The demolition body 2 is surrounded by the side partition 12 on the left side of the construction body 1, the A profiled end face partition 6a and the B profiled end face partition 6b;

The construction body 3 is surrounded by the side partition 12 on the right side of the construction body 1, the A full-end partition 5a and the B full-end partition 5b.

Step 3) The operation method for dismantling the demolition body 2 is: pull out the I-type sheet pile 4 and the II-type sheet pile (7) at the left end of the demolition body 2, and when the tunnel is built to the front section 1-2 of the construction body, the demolition The B profiling end partition 6b at the left end of the body 2 is pulled out, and the B profiling end partition 6b is pressed into the type II sheet pile 7 between the rear section 1-1 of the construction body and the front section 1-2 of the construction body. At this time, The rear section 1-1 of the construction body becomes the new demolition body 2, and the profiled end partition 6b of B becomes the profiled end partition 6a of A;

Step 4) The operation method of constructing the new construction body 3 is: press the type I sheet pile 4 and the type II sheet pile 7 at the front end (i.e. the right end) of the construction body 3, pull out the construction body 3 and the front section of the construction body 1- The entire end face of A in Type II sheet pile 7 between 2 is cut off 5a. At this time, the construction body 3 becomes the front section 1-2 of the construction body, and the front section 1-2 of the original construction body becomes the rear section 1-1 of the construction body. The end partition 5a and the type II sheet pile 7 are pressed into the front end of the type I sheet pile 4 to form a new construction 3. At this time, the A full-end partition 5a becomes the B full-face partition 5b. If the new construction 3 has water , the water in the new construction body 3 should be discharged to complete the construction of the new construction body 3 .

The I-type sheet piles 4 pulled out from step 3) and step 4) can be used to build the construction body 3, and the pulled-out B-shaped end face partition 6b can be used to form a new demolition body 2. The pulled out Type II sheet pile 7 can be used for building the building body 3 , and the pulled out A full-face partition 5a can be used for building a new building body 3 .

The I-type sheet pile 4 includes a load-bearing body 4-1, a sheet pile 4-3, and a support beam 4-4, wherein the load-bearing body 4-1 is symmetrically arranged on both sides of the support beam 4-4, and the sheet pile 4- 3 Arranged at the lower end of the load-bearing body 4-1. There are splicing units at both ends of the I-type sheet pile 4. When I-type sheet pile 4 and I-type sheet pile 4 or II-type sheet pile 7 are spliced, the gap A first filling area 4-8 is formed, and the first filling area 4-8 can be filled with fillers for water-stopping.

The I-type sheet pile 4 also includes an auxiliary sheet pile 4-2 and a walking track 4-5. The walking track 4-5 is installed on the top of the load-bearing body 4-1, and the auxiliary sheet pile 4-2 is installed on the load-bearing body 4-1. 1, when the I-type sheet pile 4 is fully inserted into place, the auxiliary sheet pile 4-2 is also inserted into the soil.

There are two supporting beams 4-4 in the type II sheet pile 7, and there is an installation groove 4-7 between the two supporting beams 4-4, and a full-face partition 5 or a profiling end-face partition can be placed in the installation groove 4-7 6. The full-face partition 5 includes a rectangular body 5-2 and a partition 5-1, wherein the partition 5-1 is installed at the lower part of the rectangular body 5-2. The profiling end partition 6 includes a rectangular body 6-2 and a partition 6-1, wherein the partition 6-1 is installed on the lower part of the rectangular body 6-2, and the lower part of the partition 6-1 has a profiling edge 6-3, and the profiling Side 6-3 is attached to the sides and top of the tunnel.

The full end face partition 5 or the profiling end face partition 6 and the type II sheet pile 7 each have a connecting unit at the junction, and a second filling area 5-3 is formed between the connecting unit and the connecting unit, and the second filling area 5 -3 can be filled with fillers for water stop.

The transportation of type I sheet pile 4, full end face partition 5, profiling end face partition 6 and type II sheet pile 7 is carried by sheet pile transfer trolley 8, and the sheet pile transfer trolley 8 includes a transfer frame 8-1 , sheet pile support 8-2, travel wheel 8-3, described sheet pile support 8-2 is symmetrically installed on both sides of transfer frame 8-1, and described travel wheel 8-3 is installed on transfer frame 8-1 The lower end of the sheet pile bracket 8-2 is used to support the I-type sheet pile 4, the II-type sheet pile 7, the full end face partition 5 or the profiling end face partition 6, and the walking wheel 8-3 can be used for the side partition 12 The I-type sheet pile 4 and the II-type sheet pile 7 travel on the walking track 4-5, and there is a gap 8-4 in the middle of the transfer frame 8-1, and the full end face partition 5 or the profiling end face partition 6 can reach the lower part from the upper part of the sheet pile transfer trolley 8 through the gap 8-4, or reach the upper part from the lower part of the sheet pile transfer trolley 8.

The pulling out or pressing in of the full end face partition 5 and the profiling end face partition 6 are pulled out and pressed in through the end face partition lifting trolley 9, and the end face partition lifting trolley 9 has a structure including a partition pulling and pressing device 9-1, Frame 9-2, running wheels 9-3 of the end face partition lifting trolley, bottom support 9-4 of the end face partition lifting trolley, the partition pulling and pressing device 9-1 is installed on the upper part of the frame 9-2, and the end face partition lifting The trolley running wheel 9-3 is installed on the bottom of the frame 9-2, and the bottom of the frame 9-2 of the end face partition lifting trolley 9 can be equipped with an end face partition lifting trolley bottom support 9-4, and the end face partition lifting trolley walks The wheel 9-3 can walk on the walking track 4-5 on the I-type sheet pile 4 and the II-type sheet pile 7, and the bottom support 9-4 of the end-face partition lifting trolley can be supported on the soil when pulling out. .

The I-type sheet pile 4, the profiling end face partition 6 and the II-type sheet pile 7 are pulled out using an end-tail pile extractor 10, and the end-tail pile extractor 10 includes a pile extractor frame 10-1, a pile extractor Device 10-2, traverse device 10-3, end-tail pile extractor bottom support 10-5, the pile extractor 10-2 is installed on the traverse device 10-3, and the traverse device 10-3 is installed On the top of the pile extractor frame 10-1; the bottom support 10-5 of the end-tail pile extractor is installed on the bottom of the pile extractor frame 10-1, and the bottom support 10-5 of the end-tail pile extractor can be supported on on the soil.

The Type I sheet pile 4, the full-face partition 5, and the Type II sheet pile 7 are pressed in by using a terminal pile driver 11, and the terminal pile driver 11 includes a pile driver frame 11-1, a pile driver Device 11-2, dredging and leveling device 11-3, driving wheel 11-4 of the terminal pile driver, bottom support 11-5 of the terminal pile driver and hoisting traverse device 11-6, the terminal pile driver The walking wheel 11-4 is installed on the bottom of the pile-pressing machine frame 11-1, and the traveling wheel 11-4 of the terminal pile-pressing machine can be on the walking track 4- 5, walk on top; the hoisting traverse device 11-6 and the pile pressing device 11-2 are installed on the top of the pile pressing frame 11-1; the bottom support 11-5 of the terminal pile pressing machine is installed on the pile pressing frame The bottom of 11-1, the bottom support 11-5 of the end pile driver can be supported on the soil; the dredging and leveling device 11-3 is installed on the front lower part of the pile driver frame 11-1.

Said step 1), enclosing a weir body, the weir body formed is in the center of the water body, tunnels are excavated from the weir body to both sides of the water body, the weir body formed can be used as a prefabricated field for making modular tunnels 14, excavated The soil can be piled up around the prefabrication field to form a sightseeing island. After the tunnel is completed, the prefabrication field can be used as a parking lot.

As shown in Figure 58, the modularized tunnel 14 consists of a cavity left part 14-1, a cavity right part 14-2, a cavity bottom plate 14-3, an intermediate wall 14-4, a left cover 14-5, and a right cover 14-6, middle cover 14-7 and horizontal partition 14-9.

Further describe the technical scheme of the present invention below in conjunction with accompanying drawing:

The mobile cofferdam open cut method applicable to tunnel construction under shallow water and land conditions includes the following steps:

1) to form a weir body;

The weir body enclosed by tunnel construction includes construction body 1, demolition body 2 and construction body 3. The construction body 1 is the weir body at the tunnel construction site, and is divided by side partition 12 and A full-end partition 5a (as shown in Figure 23 , shown in Figure 24) and A profiled end face partition 6a (as shown in Figure 25), the demolition body 2 is the weir body in the demolition process, and is composed of the side partition 12 on the left side of the construction body 1, and the A profiled end face Partition 6a and B profiling end face partition 6b surround, and the construction body 3 is the weir body in the construction process, and is surrounded by the side partition 12 on the right side of the construction body 1, A full end face partition 5a and B full end face partition 5b; The two sides of the construction body 1, the demolition body 2 and the construction body 3 are side partitions 12, between the construction body 1 and the demolition body 2 is an A profiled end face partition 6a, between the construction body 1 and the construction body 3 It is the full-face partition 5a of A. The construction body 1 includes the rear section 1-1 of the construction body and the front section 1-2 of the construction body. The side partition 12 is composed of several I-type sheet piles 4 (as shown in Fig. 6 and Fig. 7 ) and/or II-type sheet piles 7 (as shown in Fig. 14 and Fig. 15 ), and the I-type sheet piles 4 and Type II sheet piles 7 are set according to actual construction needs;

2) Excavate the soil in the construction body 1 to build the tunnel.

The preferred method of this step is: digging out the soil in the construction body 1, transporting the tunnel modules poured in the prefabrication yard to the place in the completed tunnel, and constructing the tunnel.

3) Demolition Demolition body 2:

For the convenience of description, it is assumed that the construction body 3 does not move, and the initial state is shown in Figure 5.1; the Type I sheet pile 4 and the Type II sheet pile (7) at the left end of the demolition body 2 are pulled out, as shown in Figure 5.2; the tunnel construction After arriving at the front section 1-2 of the construction body, pull out the B profiled end partition 6b at the left end of the demolished body 2, as shown in Figure 5.3; put the B profiled end partition 6b into the rear section 1-1 of the construction body and construct In the type II sheet pile 7 between the front section 1-2 of the construction body, at this time, the rear section 1-1 of the construction body becomes a new demolition body 2, as shown in Figure 5.4;

4) Build new construct 3:

For the convenience of description, it is assumed that the demolition body 2 does not move, and the initial state is shown in Figure 5.4; Type I sheet pile 4 and Type II sheet pile 7 are pressed into the front end of the construction body 3, as shown in Figure 5.5; the construction body 3 is pulled out A full-face partition 5a in Type II sheet pile 7 between the front section 1-2 of the construction body, at this time, the construction body 3 becomes the front section 1-2 of the construction body, and the front section 1-2 of the original construction body becomes the back section of the construction body Section 1-1, as shown in Figure 5.6; A full-face partition 5a and Type II sheet pile 7 are pressed into the front end of the pressed I-type sheet pile 4 to form a new construction body 3. At this time, A full-face partition 5a becomes the full-face partition 5b of B. If there is water in the new building 3, the water in the building 3 should be drained, as shown in Figure 5.1; the construction of the building 3 is completed.

5) Repeat steps 2) to 4) until the tunnel construction is completed.

In step 3), the pulled-out type I sheet pile 4 can be used to build the construction body 3, the pulled-out B-shaped profiled end face partition 6b can be used to form a new demolition body 2, and the pulled-out type II sheet pile 7 Available for construction of said structure 3;

In step 4), the extracted full-face partition 5a of A can be used for building a new structure 3 .

The I-type sheet pile 4, as shown in Figures 6 to 10, is used to isolate water and soil on both sides of the I-type sheet pile 4, so as to carry out soil excavation and tunnel construction. The force diagram of the I-type sheet pile 4 is shown in Fig. 11 .

I-type sheet pile 4, its structure comprises load-bearing body 4-1, sheet pile 4-3, support beam 4-4, and described load-bearing body 4-1 is symmetrically arranged on the both sides of support beam 4-4, and described sheet pile 4-3 is arranged at the lower end of the load-bearing body 4-1. There are splicing units at both ends of the I-type sheet pile 4. When the I-type sheet pile 4 and the I-type sheet pile 4 are spliced, there A first filling area 4-8 (as shown in FIG. 12 and FIG. 13 ) is formed, and the first filling area 4-8 can be filled with fillers for water-stopping.

The I-type sheet pile 4 also includes an auxiliary sheet pile 4-2, and the auxiliary sheet pile 4-2 is installed at the lower end of the load-bearing body 4-1. When the I-type sheet pile 4 is fully inserted in place, the auxiliary sheet pile 4 -2 is also inserted into the dirt.

The I-shaped sheet pile 4 also includes a running track 4-5, and the running track 4-5 is installed on the top of the bearing body 4-1. There are four described walking tracks 4-5.

The main function of the load-bearing body 4-1 is to transfer the vertical downward force acting on its top to the soil through its bottom, which is the sheet pile transfer trolley 8 on it (as shown in Figure 29), the end face partition Lifting trolley 9 (as shown in Figure 35), end-tail pile pulling trolley 10 (as shown in Figure 37), terminal pile pressing trolley 11 (as shown in Figure 39) etc. provide operating platforms.

The function of the sheet pile 4-3 is to isolate the water and soil on both sides of the I-type sheet pile 4, so as to carry out soil excavation and tunnel construction.

The function of the supporting beam 4-4 is to bear the water pressure transmitted from the bearing body 4-1 on both sides thereof and the pressure transmitted from the sheet pile 4-3.

The functions of the auxiliary sheet pile 4-2 are: ①, to fill the space between the auxiliary sheet pile 4-2 and the sheet pile 4-3 with fillers to solve the problem of uneven water bottom surface; ②, to enhance the water-stop effect.

The function of the walking track 4-5 is: sheet pile transfer trolley 8 (as shown in Figure 29), end face partition lifting trolley 9 (as shown in Figure 35), end-tail pile extractor 10 (as shown in Figure 37), The end pile driver 11 (as shown in Figure 39) provides a running track, the inner two are for the sheet pile transfer trolley 8 to run, and the outer two are for the end surface partition lifting trolley 9, the end tail pile extractor 10, and the end pile driver 11 walking, such arrangement is convenient for the sheet pile transfer trolley 8 to enter the bottom of the end partition lifting trolley 9, the end-tail pile extractor 10, and the end pile driver 11, and then transfer the I-type sheet pile 4 and the II-type sheet pile 7 operate.

The function of the splicing unit is ①, for water sealing, ②, in order to form the first filling area 4-8, after filling the first filling area 4-8 with filler for water sealing, the splicing unit can prevent the filling from losing , and the filling can further enhance the water-stop effect. If there is a small amount of water seepage, it can be solved by pumping water and other methods. For this reason, the present application discloses two structures of splicing units, as shown in FIG. 12 and FIG. 13 .

The structure of the first splicing unit is as follows: as shown in Figure 12, two pairs of hinged buckles 4-6 are installed symmetrically on both sides of the I-type sheet pile 4. After the two pairs of hinged buckles 4-6 are hinged, the two pairs of hinged buckles 4 -6 and the sides of two adjacent I-shaped sheet piles 4 together form a first filling area 4-8.

The structure of the second splicing unit is: as shown in Figure 13, two pairs of hinged buckles 4-9 are installed symmetrically on both sides of the I-shaped sheet pile 4, and the two pairs of hinged buckles 4-9 can be butted, and the two pairs of hinged buckles 4 -9 and the sides of two adjacent I-shaped sheet piles 4 together form a first filling area 4-8.

There are many schemes for forming the first filling region 4-8.

The advantage of I-type sheet pile 4 is that the I-type sheet pile is an integral structure, which combines the traditional stepped sheet pile and horizontal support into an integral structure, with a smaller excavation area and less excavated earthwork.

The Type II sheet pile 7, as shown in Figures 14 to 17, differs in function between the Type II sheet pile 7 and the Type I sheet pile 4 in order to place the full end face partition 5 (as shown in Figure 21) and the profiling end face partition 6 (as shown in Figure 22), bear the pressure of water and soil pressure on the full-face partition 5 and the profiling end-face partition 6, and its force diagram is shown in Figure 18.

Type II sheet pile 7 has roughly the same structural features as Type I sheet pile 4, and also includes load-bearing body 4-1, sheet pile 4-3, supporting beam 4-4, and splicing unit. The difference is that the supporting beam 4-4 has Two, there is an installation groove 4-7 between the two supporting beams 4-4, and a full-face partition 5 (as shown in Figure 23) or a profiling end-face partition 6 (such as As shown in Figure 25), the type II sheet pile 7 and the full-face partition 5 or the profiling end-face partition 6 each have a connection unit at the junction, and the full-face partition 5 or the profiling end-face partition 6 is put into the installation groove 4- 7, a second filling area 5-3 is formed between the connecting units, as shown in FIG. 20 , the second filling area 5-3 can be filled with fillers for water-stopping.

The structure of the connecting unit may be a hinge buckle 4-6.

A connection device, such as a bolt connection, is installed in the installation groove 4-7.

The load-bearing body 4-1, sheet pile 4-3, support beam 4-4 and splicing unit on the type II sheet pile 7 have the same functions as the corresponding parts of the type I sheet pile 4.

The function of the installation groove 4-7 is: to place the full end face partition 5 or the profiled end face partition 6 in the type II sheet pile 7, and connect the full end face partition 5 or the profiled end face partition 6 to the type II sheet pile through the connecting device Pile 7, forming an integral structure. The full-face partition 5 or the profiling end-face partition 6 is put into the installation groove 4-7, and the water-stop effect can be enhanced after filling the second filling area 5-3 with filler for water-stop, as shown in FIG. 20 .

The function of the connection device is to connect the full-face partition 5 or the profiling end-face partition 6 with the type II sheet pile 7, and the implementation method may be to use bolts for connection.

The role of the connecting unit is to form a second filling area. After filling the second filling area with filler for water stop, the connecting unit can prevent the filling from losing, and the filler can be used to stop water. If there is a small amount of water seepage, It is solved by pumping water and other methods.

The full-face partition 5 and the profiling end-face partition 6, as shown in Figures 21 to 27, the full-face partition 5 is used to isolate the water and soil at the front end of the construction body 1; the profiling end-face partition 6 is used to isolate the rear of the construction body 1 side of the water and soil.

The structure of the full-face partition 5 includes a partition 5-1 and a rectangular body 5-2, the partition 5-1 is installed at the lower part of the rectangular body 5-2, and the full-face partition 5 and Type II sheet pile 7 are There are connecting units at the junctions, and after the full-face partitions 5 are put into the installation grooves 4-7 of Type II sheet piles 7, a second filling area 5-3 is formed between the connecting units, as shown in Figure 20 , the second filling area 5-3 can be filled with fillers for water-stopping.

The structure of the profiling end face partition 6 is roughly the same as that of the full end face partition 5, as shown in Figure 22, including a partition 6-1 and a rectangular body 6-2, the difference is that the lower part of the profiling end face partition 6 has a profiling edge 6- 3. The profiled edge 6-3 is close to the two sides and the top of the outer contour of the tunnel.

In order to reduce the press-in force when the full-face partition 5 or the profiling end-face partition 6 is pressed in, the full-face partition 5 or the profiling end-face partition 6 can be composed of several segments spliced together.

The function of the partition 5-1 or the partition 6-2 is to isolate the water and soil at the front end or rear end of the construction body 1 .

The function of the rectangular body 5-2 or the rectangular body 6-2 is: ①. To facilitate the extraction or pressing of the partition 5-1 or the partition 6-1, that is, to provide a uniform pull-out force when pulling out or pressing in or press-in force; ②, apply the horizontal force on the partition 5-1 or partition 6-1 to the supporting beam 4-4 of the Type II sheet pile 7; ③, if the rectangular body 5-2 or the rectangular body 6-2 When it is a cavity, it can increase the buoyancy when pulling out or increase the gravity when pressing in by draining water and filling water.

The function of the profiling edge 6-3 is to prevent the profiling end face partition 6 from interfering with the tunnel when isolating the water and soil at the rear end of the construction body.

The sheet pile transfer trolley 8, as shown in Figures 28 to 34, the main functions of the sheet pile transfer trolley 8 are:

①. Transporting type I sheet pile 4, type II sheet pile 7, full end face partition 5 or profiling end face partition 6;

② Carry the profiling end face partition 6 and use it together with the end face partition elevating trolley 9 (as shown in Figure 35 and Figure 36), put the profiling end face partition 6 into the front section 1-2 of the construction body and the rear section 1-2 of the construction body 1 in the Type II sheet pile 7;

③. Carry Type II sheet pile 7 and use it in conjunction with the end face partition lifting trolley 9 to pull out the full end face partition 5 in the Type II sheet pile 7 between the construction body 3 and the construction body 1 into the Type II sheet pile 7 .

The sheet pile transfer trolley 8 has a structure comprising a transfer frame 8-1, a sheet pile support 8-2, and a walking wheel 8-3, and the sheet pile support 8-2 is symmetrically installed on both sides of the transfer frame 8-1. side, the walking wheels 8-3 are installed at the lower end of the transfer frame 8-1, and the sheet pile bracket 8-2 is used to support the I-type sheet pile 4, the II-type sheet pile 7, the full-face partition 5, or the imitation Shaped end face partition 6, the walking wheels 8-3 can walk on the walking track 4-5 on the I-type sheet pile 4 and II-type sheet pile 7 of the side partition 12, and the middle of the transfer frame 8-1 is also There is a gap 8-4, and the full-face partition 5 or profiled-face partition 6 can pass through the gap 8-4 from the upper part of the sheet pile transfer trolley 8 to the lower part, or from the lower part of the sheet pile transfer trolley 8 to the upper part.

The effect of sheet pile support 8-2 is to support sheet pile 4-3, also can support partition 5-1 and partition 6-1.

The effect of walking wheel 8-3 is to move for sheet pile transfer dolly 8.

The walking principle of the walking wheel 8-3 is: the walking wheel is composed of eight sets of liftable wheels (as shown in Figure 30 to Figure 34), when the sheet pile transfer trolley transitions from the high walking track to the low walking track, it will go ahead Walk to make the first set of wheels 8-3-1 and the fifth set of wheels 8-3-5 leave the high walking track and enter the low walking track directly above, then the first set of wheels 8-3-1 and the fifth set of wheels Group 8-3-5 extends downward until it touches the low travel track, and the sheet pile transfer trolley continues to walk until the third wheel group 8-3-3 and the seventh wheel group 8-3-7 break away from the high travel track and enter Directly above the low walking track, then the second wheel set 8-3-2 and the sixth wheel set 8-3-6, the third wheel set 8-3-3 and the seventh wheel set 8-3-7 Stretch out until it touches the low running track, and the sheet pile transfer trolley continues to walk. When the fourth set of wheels 8-3-4 and the eighth set of wheels 8-3-8 leave the high running track and enter directly above the low running track, The fourth set of wheels 8-3-4 and the eighth set of wheels 8-3-8 protrude downward until they contact the low running track. So far the transition of the sheet pile transfer trolley from the high travel track to the low travel track has been completed. When the sheet pile transfer trolley transitions from a low-travel track to a high-travel track, the same is true and vice versa. In the running direction, the distance between any two sets of wheels is larger than the gap of the running track, so that the sheet pile transfer trolley can transition smoothly on the running track.

The function of the notch 8-4 is to make the full end face partition 5 or the profiling end face partition 6 of the upper (lower) part of the sheet pile transfer trolley 8 enter its lower (upper) part.

The end face partition lifting trolley 9, as shown in Figure 35 and Figure 36, the main functions of the end face partition lifting trolley 9 are: ①, pull out the full end face of the type II sheet pile 7 between the construction body 3 and the front section 1-2 of the construction body Partition 5; ②. Put the profiling end face partition 6 into the type II sheet pile 7 between the rear section 1-1 of the construction body and the front section 1-2 of the construction body.

The full-section partition 5 and the profiled end partition 6 can be pressed in or pulled out by the end partition lifting trolley 9 .

The structure of the end face partition lifting trolley 9 includes a partition pulling and pressing device 9-1, a frame 9-2, an end face partition lifting trolley running wheel 9-3, and an end face partition lifting trolley bottom support 9-4. The device 9-1 is installed on the top of the frame 9-2, and the end-face partition lifting trolley walking wheel 9-3 is installed on the bottom of the frame 9-2, and the bottom of the frame 9-2 of the end-face partition lifting trolley 9 can be Equipped with the bottom support 9-4 of the end-face partition lifting trolley, the walking wheels 9-3 of the end-face partition lifting trolley can walk on the walking track 4-5 on the I-type sheet pile 4 and the II-type sheet pile 7, and the end-face partition Lifting trolley bottom support 9-4 can be supported on the soil when pulling out operation.

The partition drawing and pressing device 9-1 can be a functional component such as a screw rod with the properties of pulling out and pressing in, and its function is to pull out or press in the full end face partition 5 and the profiling end face partition 6 .

The effect and the walking principle of the running wheel 9-3 of the end face partition lifting trolley are the same as the sheet pile transfer trolley 8.

The function of the support 9-4 at the bottom of the end face partition lifting trolley is to transfer the vertically downward force acting on the end face partition lifting trolley to the soil.

End-tail pile extractor 10, as shown in Fig. 37 and Fig. 38, the main function of end-tail pile extractor 10 is to pull out type I sheet pile 4, type II sheet pile 7 and profiling end face partition 6, and place them on the Sheet pile transfer trolley 8.

End-tail pile extractor 10, its structure includes pile extractor frame 10-1, pile extractor 10-2, traverse device 10-3, end-tail pile extractor walking wheel 10-4, end-tail pile extractor bottom support 10-5, the pile pulling device 10-2 and the traverse device 10-3 are installed on the top of the pile pulling frame 10-1; -1, the travel wheel 10-4 of the end-tail pile extractor can walk on the walking track 4-5 on the type I sheet pile 4 and type II sheet pile 7; the bottom of the end-tail pile extractor The support 10-5 is installed at the bottom of the pile extractor frame 10-1, and the bottom support 10-5 of the end-tail pile extractor can be supported on the soil.

The pile pulling device 10-2 can be a hoist, a hoist, a chain, a screw mandrel, etc., which have the function of pulling out and lowering the hanging device.

The lateral movement device 10-3 may be a functional component with lateral movement similar to a crane.

The functions of the walking wheels 10-4 of the end-tail pile extractor and the bottom support 10-5 of the end-tail pile extractor are the same as those of the end face partition lifting trolley 9, the end face partition lifting trolley walking wheels 9-3, and the end face partition lifting trolley bottom support 9- 4.

The function of the pile pulling device 10-2 is to pull out the I-type sheet pile 4, the profiling end face partition 6, and the II-type sheet pile 7.

The function of the traversing device 10-3 is to place the I-type sheet pile 4, the profiling end face partition 6, and the II-type sheet pile 7 pulled out by the pile pulling device 10-2 on the sheet pile transfer trolley 8.

End-end pile driver 11, as shown in Figure 39 and Figure 40, the main functions of end-end pile driver 11 are: ①, transfer I-type sheet pile 4, full-face partition 5, and II-type sheet pile 7 from the sheet pile Take off the trolley 8 and move it laterally, and press the I-type sheet pile 4, the full-face partition 5, and the II-type sheet pile 7 to the set position; ②, clean up the silt in front and level the construction foundation.

End pile driver 11, its structure includes pile driver frame 11-1, pile driver 11-2, dredging leveling device 11-3, end pile driver walking wheel 11-4, end pile driver bottom Support 11-5 and hoisting traverse device 11-6, the driving wheel 11-4 of the terminal pile driver is installed on the bottom of the pile driving frame 11-1, and the driving wheel 11-4 of the terminal pile driver can be Walk on the walking track 4-5 on the I-type sheet pile 4 and II-type sheet pile 7; the hoisting traverse device 11-6 and the pile-pressing device 11-2 are installed on the pile-pressing frame 11-1 The upper part; the bottom support 11-5 of the end pile driver is installed on the bottom of the pile driver frame 11-1, and the bottom support 11-5 of the end pile driver can be supported on the soil; the dredging and leveling device 11-3 is installed in the front lower part of pile pressing frame 11-1.

The pile-pressing device 11-2 may be a pile-pressing structure such as a piling or a heavy hammer.

The structure of pile-pressing device 11-2 comprises screw mandrel transmission device and hydraulic cylinder, and screw mandrel drive device is installed on the pile-pressing frame 11-1, and hydraulic cylinder is installed on the lower end of screw mandrel drive device, and during pile pressing, hydraulic cylinder first Press the I-type sheet pile 4 downward into the stroke of a hydraulic cylinder, and then the screw drive device pushes the hydraulic cylinder downward for a stroke of the hydraulic cylinder, and the oil cylinder retracts synchronously. Repeat the above two steps until the I-type sheet pile 4 Press into place.

The functions of the traveling wheel 11-4 of the terminal pile driver and the bottom support 11-5 of the terminal pile driver are the same as those of the end face partition lifting trolley 9, the end face partition lifting trolley walking wheel 9-3, and the end face partition lifting trolley bottom support 9- 4.

The function of the hoisting traverse device 11-6 shown is to remove the I-type sheet pile 4, the full-face partition 5, and the II-type sheet pile 7 from the sheet pile transfer trolley 8.

The function of the pile pressing device 11-2 is to press the I-type sheet pile 4, the full-face partition 5, and the II-type sheet pile 7 into the set positions.

The function of the dredging and leveling device 11-3 is to clean up the silt in front of the end presser and level the construction foundation.

The method of pulling out and transporting the I-type sheet pile 4 is as follows: the end-to-end pile extractor 10 travels to the top of the I-type sheet pile 4 at the rear end of the demolition body 2, and discharges the water in the load-bearing body 4-1 of the I-type sheet pile 4, In order to reduce the pull-out force, the pile pulling device 10-2 pulls out the I-type sheet pile 4, the sheet pile transfer trolley 8 drives to the right end below the end-tail pile puller 10, and the traverse device 10-3 pulls the I-type sheet pile 4 Placed on the sheet pile transfer trolley 8, the sheet pile transfer trolley 8 carries the I-type sheet pile 4 forward to the end pile driver 11.

Similarly, type II sheet pile 7 is pulled out and transported.

In the same way, the profiling end face partition 6 is pulled out and transported.

In the same way, the type II sheet pile 7 with the profiling end face partition 6 is pulled out and transported.

The method of transporting the profiling end partition 6 and pressing it into the type II sheet pile 7 between the rear section 1-1 of the construction body and the front section 1-2 of the construction body is: the end partition lifting trolley 9 drives to the top of the type II sheet pile 7 , the sheet pile transfer trolley 8 carries the profiling end face partition 6 and travels to the bottom of the end face partition lifting trolley 9, and the partition pulling and pressing device 9-1 hangs the profiling end face partition 6 and puts it into the Type II sheet pile 7.

The method of pulling out and transporting the full end partition 5 in the type II sheet pile 7 between the construction body 3 and the front section 1-2 of the construction body is: the end partition lifting trolley 9 drives to the top of the type II sheet pile 7, and the partition is pulled out and pressed. The device 9-1 pulls out the full-face partition 5 to the sheet pile transfer trolley 8 through the gap 8-4, and the sheet pile transfer trolley 8 carries the full-face partition 5 forward for transport.

The method of transporting and pressing the type II sheet pile 7 is: the sheet pile transfer trolley 8 carries the type II sheet pile 7 and drives into the pile driver 11 at the end, and the hoisting traverse device 11-6 lifts the type II sheet pile 7 from the sheet pile Take off the transfer trolley 8 and place it on the lower part of the pile pressing device 11-2, fill the load-bearing body 4-1 of the type II sheet pile 7 and the rectangular body 5-2 of the full-face partition 5 with water, and the pile pressing device 11 -2 Press the Type II sheet pile 7 into the soil until it reaches the set position.

Similarly, transport and press into the I-type sheet pile 4.

In the same way, transport and press into the full-face partition 5.

In the same way, the type II sheet pile 7 with full-face partition 5 is transported and pressed in.

Under land conditions, the case of a shallow groundwater table is equivalent to the shallow water condition, and the condition of a deep groundwater table does not require profiling end-face partitions 6 and full-face partitions 5 . Therefore, the mobile cofferdam open cut method can also be constructed under land conditions.

(B) As shown in Figure 41 to Figure 57, the submerged cofferdam open excavation method suitable for medium and deep water conditions includes the following steps:

1) Enclosing the weir body: as shown in Figure 43, use the upside-down box body 13 to enclose the construction body 1, the demolition body 2 and the construction body 3 in sequence;

2) Excavate the soil in the construction body 1 to build the tunnel;

3) Demolition of demolition body 2: For the convenience of description, assume that the initial state is as shown in Figure 46. The state of the shaped partition 6 is shown in Figure 46, and the steps include:

① Isolation of construction body 1 and demolition body 2:

As shown by the arrow in Figure 47, press the profiling end face partition 6 on the left side of the construction body 1, and fill the surroundings of the profiling end face partition 6 to isolate the construction body 1 and the demolition body 2;

②Pull out the demolition body 2, including:

a Put down the A full-end partition 5a and B full-end partition 5b on both sides of the demolition body 2, as shown in Figure 48;

b Lift the profiling end partition 6 on the left side of the demolition body 2, as shown in Figure 48;

c. Discharge the water in the cabin body 13-1, and pass gas to the lower part of the demolition body 2, so that the upward force on the demolition body 2 is greater than the downward force (the force diagram of the demolition body 2 is shown in Figure 50), so that Demolition body 2 floats up;

d During the floating process of the demolition body 2, the A full-face partitions 5a and B full-face partitions 5b on both sides are also lowered continuously (as shown in Figure 49), until the demolition body 2 is pulled out, as shown in Figure 51;

4) Construct structure 3, the steps include:

①Docking of construction body 3 and construction body 1: transport construction body 3 to the right side of construction body 1, and dock construction body 3 with the splicing unit of construction body 1;

②Sinking construction body 3: as shown by the arrow in Figure 52, put down the A full-end partition 5a and B full-end partition 5b on the left and right sides of the construction body 3; -1 is filled with water, the construction body 3 gradually sinks and is initially inserted into the soil, so that the cabin body 13-1, the side partition 12, the left partition 13-2, the right partition 13-3 and the soil form a closed cavity 13-5, as shown in the figure 53. The state shown in Figure 54;

③ Construction body 3 is pressed into the soil layer: the water in the closed cavity 13-5 at the lower part of the construction body 3 is discharged to form negative pressure locally in the closed cavity 13-5, because the downward resultant force of the construction body 3 is much greater than the upward resultant force of the construction body 3 , the force diagram is shown in Figure 55, therefore, in the process of drainage, the construction body 3 is gradually pressed into the soil layer under the action of the downward resultant force until it reaches the set position, as shown in Figure 56;

④Construction body 3 is connected with construction body 1: continue to drain the water at the junction of the closed cavity and box body 13, lift the A full-face partition 5a on the left side of construction body 3 and the B full-face partition 5b on the right side of construction body 1, and the construction body 3 connects with the construction body 1, as shown by the arrow in Figure 57, at this time, the construction body 3 becomes a new construction body 1.

5) Repeat steps 2) to 4) until the tunnel construction is completed.

Step 3) In the step of removing the demolition body, the detached demolition body 2 can be reused as a new construction body 3 .

As shown in Figures 41 to 45, the box body 13 with an upside-down button has a structure including a cabin body 13-1, a side partition 12, a left-end partition 13-2, a right-end partition 13-3 and a sealing device, and the cabin body 13- 1 is installed above the side partition 12, the left partition 13-2 and the right partition 13-3 are respectively installed at both ends of the cabin 13-1, the cabin 13-1, the side partition 12, the left partition 13- 2 and the right-end partition 13-3, and the left-end partition 13-2 is equipped with a full-face partition 5a (as shown in Figure 23 and Figure 24) and a profiling end-face partition 6 (as shown in Figure 25 and Figure 26) As shown), the right end partition 13-3 is installed with a B full-face partition 5b, and the upper part of the A full-face partition 5a, B full-face partition 5b, and profiling end-face partition 6 is respectively installed with a set of partition lifting devices 13-4. The two ends of the box body 13 are also equipped with a splicing unit for docking between the box bodies 13, and a sealing device is installed on the splicing unit. The side partition 12 , the left partition 13 - 2 and the right partition 13 - 3 jointly enclose the box body 13 with the upside down.

The side partitions 12 are sheet piles.

The function of the box body 13 is to form a construction space for tunnel construction.

The function of the cabin body 13-1 is to increase the buoyancy of the box body 13 by inflating or increase the gravity of the box body 13 by filling water.

The effect of left end partition 13-2 is to be used for isolating the water and soil of box body 13 rear ends.

The effect of right end partition 13-3 is to be used for isolating the water and soil of box body 13 front ends.

The function of the partition lifting device 13-4 is to lift or lower the A full-face partition 5a, the B full-face partition 5b and the profiling end-face partition 6.

The function of the sealing device is to seal between the box body 13 and the box body 13 .

Claims (13)

1. portable cofferdam cut and cover method, is characterized in that the method comprises the steps:

1) weir body, is surrounded；

2), cut out the earth that construction is internal, build tunnel；

3), body is removed；

4), newly-built body is built；

5), step 2 is repeated) to 4), until completing constructing tunnel；Described step 2), 3), 4) in no particular order；

Described step 1) surrounds weir body, and this weir body includes constructing body, dismounting body and building body,

Wherein construct body, remove body and build body two sides be side cut off,

It is that A profiling end face cuts off between described construction body and dismounting body, is that the full end face of A cuts off between construction body and construction body；

Described construction body is cut off by side, the full end face of A cuts off and A profiling end face partition surrounds；

Described construction body includes construct body back segment and construction body leading portion, is II template stake between construction body back segment and construction body leading portion, and described side cuts off to be spliced by several I template stakes and/or II template stake and forms；

Described dismounting body is cut off by the side on the body left side of constructing, A profiling end face cuts off and B profiling end face partition surrounds；

Described construction body is cut off by the side on the right of body of constructing, the full end face of A cuts off and B full end face partition surrounds.

Portable cofferdam the most according to claim 1 cut and cover method, it is characterized in that described step 3) is removed the operational approach of body and is: extract I template stake and the II template stake removing body left end, after tunnel is built at construction body leading portion, the B profiling end face removing body left end is cut off and extracts, and B profiling end face is cut off the II template stake put between construction body back segment and construction body leading portion, now, construction body back segment becomes newly removes body, and B profiling end face cuts off becomes A profiling end face partition.

Portable cofferdam the most according to claim 1 cut and cover method, it is characterized in that described step 4) is built the operational approach of newly-built body and is: building front end press-in I template stake and the II template stake of body, the full end face of A extracted in the II template stake built between body and construction body leading portion cuts off, now, build body and become construction body leading portion, former construction body leading portion becomes construction body back segment, complete for A end face is cut off and II template stake is pressed into the right-hand member being pressed into I template stake, form newly-built body, now, the full end face of A cuts off becomes B full end face partition, the full end face of former B cuts off becomes A full end face partition, if newly-built body has water, then should discharge newly-built internal water, complete the construction of newly-built body.

4. according to the portable cofferdam cut and cover method described in Claims 2 or 3, it is characterized in that the I template stake extracted in described step 3) is for building described construction body, the described B profiling end face extracted cuts off for forming new dismounting body, the described II template stake extracted for building described construction body, described in the full end face of A extracted cut off the construction body new for construction.

Portable cofferdam the most according to claim 1 cut and cover method, it is characterized in that described I template stake, it is characterized in that including weight body, sheet pile, support crossbeam, wherein weight body is symmetrically arranged in the both sides supporting crossbeam, wherein sheet pile is arranged in weight body lower end, and there are concatenation unit, I template stake and I template stake or II template stake in the two ends of I template stake when splicing, form the first filling region between concatenation unit and concatenation unit, in this first filling region, fill the implant for sealing.

Portable cofferdam the most according to claim 5 cut and cover method, it is characterized in that described I template stake also includes assisting sheet pile and walking track, walking track installation is at weight body top, auxiliary sheet pile is arranged on the lower end of weight body, when described I template stake is entirely insertable and puts in place, auxiliary sheet pile is also inserted into earth.

Portable cofferdam the most according to claim 1 cut and cover method, it is characterized in that with the difference of I template stake, described II template stake is that II template stake includes that two support crossbeam, a mounting groove is had between two support crossbeams, place full end face in mounting groove to cut off or profiling end face partition, this full end face cuts off and includes cuboid, cut off, wherein cut off the bottom being arranged on cuboid, profiling end face cuts off and includes cuboid, cut off, wherein cut off the bottom being arranged on cuboid, profiling limit is arranged at the bottom cut off, described profiling limit is close to both sides and the top in tunnel, described full end face cuts off or profiling end face cuts off to be respectively arranged with in junction with II template stake and is connected unit, this connection unit fills region with being connected between unit formation second, the implant for sealing is filled in described second filling region.

Portable cofferdam the most according to claim 1 cut and cover method, it is characterized in that described I template stake, full end face cuts off, profiling end face cuts off and the transport of II template stake is to use sheet pile transport carriage to transport, described sheet pile transport carriage, including transhipment frame, sheet piling, road wheel, described sheet piling is symmetrically mounted on the both sides of transhipment frame, described road wheel is arranged on the lower end of transhipment frame, described sheet piling is used for supporting I template stake, II template stake, full end face cuts off, profiling end face cuts off, walk on walking track in I template stake that described road wheel cuts off in side and II template stake, the centre of described transhipment frame also has breach, described full end face cuts off or profiling end face cuts off by breach from the arrival bottom, top of sheet pile transport carriage, or from the arrival top, bottom of sheet pile transport carriage.

9. according to the portable cofferdam cut and cover method described in Claims 2 or 3, extract or be pressed into full end face partition described in it is characterized in that and profiling end face partition cuts off lift cart by end face and extracts and be pressed into, described end face cuts off lift cart, pressure device is pulled out including partition, frame, end face cuts off lift cart road wheel, described partition pulls out pressure device and is arranged on the top of frame, described end face cuts off lift cart road wheel and is arranged on the bottom of frame, this end face cuts off the bottom of the frame of lift cart and cuts off lift cart bottom support equipped with end face, described end face cuts off walks on lift cart road wheel walking track in I template stake and II template stake, described end face cuts off lift cart bottom support when carrying out extracting operation, it is supported on soil.

Portable cofferdam the most according to claim 2 cut and cover method, it is characterized in that described I template stake, profiling end face cut off and II template stake uses end tail pile-drawing machine to extract, described end tail pile-drawing machine includes pile pulling frame, pile pulling device, Traverse Displacement Unit, end tail pile-drawing machine bottom support, and described pile pulling device and Traverse Displacement Unit are arranged on the top of pile pulling frame；Described end tail pile-drawing machine bottom support is arranged on the bottom of pile pulling frame, and described end tail pile-drawing machine bottom support is supported on soil.

11. portable cofferdam according to claim 3 cut and cover methodes, it is characterized in that described I template stake, full end face cut off, II template stake is to use termination pile press machine press-in, described termination pile press machine, including piling machine frame, pile pressing device, desilting flattening device, termination pile press machine road wheel, termination pile press machine bottom support and lifting Traverse Displacement Unit, described termination pile press machine road wheel is arranged on the bottom of piling machine frame, and pile press machine road wheel walking track in described I template stake and II template stake in described termination is walked；Described lifting Traverse Displacement Unit and pile pressing device are arranged on the top of piling machine frame；Described termination pile press machine bottom support is arranged on the bottom of piling machine frame, and described termination pile press machine bottom support is supported on soil；Described desilting flattening device is arranged on the front lower portion of piling machine frame.

null12. portable cofferdam according to claim 1 cut and cover methodes，It is characterized in that described construction body、Remove body and build the box body that body is back-off，The box body of this back-off includes nacelle、Side cuts off、Left end cuts off and right-hand member cuts off，Described nacelle is arranged on the top that side cuts off，Left end cuts off and right-hand member cuts off the two ends being separately mounted to described nacelle，Described nacelle、Side cuts off、Left end cuts off sealing between right-hand member partition，Described left end is provided with the full end face of A and cuts off and profiling end face partition in cutting off，Right-hand member is provided with the full end face of B and cuts off in cutting off，The full end face of described A cuts off、The top that the full end face of B cuts off and profiling end face cuts off respectively is provided with a set of partition lowering or hoisting gear，The two ends that described side cuts off are also equipped with between box body the concatenation unit of docking，When the full end face at box body two ends cuts off and puts down，Nacelle、Side cuts off、Left end cuts off and right-hand member cuts off the box body jointly surrounding described back-off.

13. portable cofferdam according to claim 1 cut and cover methodes, it is characterized in that described step 1), surround weir body, the weir body that this surrounds is in water body central authorities, from this weir body toward water body two sides tunneling, the weir body surrounded is as the precasting yard making modularity tunnel, the earth accumulation excavated forms tourist island around precasting yard, and after tunnel builds up, precasting yard is as parking lot.