CN204626416U - A kind of from creeping into steel pipe pile diaphragm wall - Google Patents

Abstract

The utility model relates to a self-drilling steel pipe pile continuous wall in the field of foundation pit enclosure engineering. In the steel pipe pile continuous wall, a power device (5) and a self-propelled drill bit ( 6), the self-advancing drill pipe (7), when inserted into the construction, drives the self-advancing drill pipe (7) and the self-advancing drill bit (6) through the power device (5), and presses against the soil body at the bottom of the steel pipe pile (1). Drilling construction can greatly reduce the difficulty of insertion construction and the impact of insertion construction on the surrounding environment, and is conducive to reducing the impact of pile pulling construction on the surrounding environment. The construction equipment is simple, high in efficiency, low in cost, and has little impact on the surrounding environment .

Description

A self-drilling steel pipe pile continuous wall

technical field

The invention relates to the field of foundation pit protection in the field of geotechnical engineering.

Background technique

The insertion soil construction of steel pipe piles and steel pipe pile diaphragm walls is one of the key technologies in the field of foundation pit enclosure engineering in the field of geotechnical engineering. How to solve the problem of inserting steel pipe pile diaphragm walls in hard soil areas and complex environments? Pulling construction, effectively controlling the impact of plugging construction on the surrounding environment, is one of the main obstacles in the application of steel pipe pile diaphragm walls and steel pipe piles in foundation pit enclosure and pile foundation engineering. In hard soil areas, it is very difficult to insert steel pipe piles into the diaphragm wall. In areas with complex surrounding environments, factors such as steel pipe piles and steel pipe pile diaphragm wall insertion construction towage, settlement and construction vibration have the greatest impact on the surrounding environment. Difficulties to be overcome in the application of walls in foundation pit engineering and pile foundation engineering.

Contents of the invention

The first object of the present invention is to provide a self-drilling steel pipe pile diaphragm wall construction method, which can successfully complete the construction of the steel pipe pile diaphragm wall, the construction is fast, and the construction has a very small impact on the surrounding environment. Micro-disturbance construction method in soil engineering.

The self-drilling steel pipe pile diaphragm wall construction method includes the following steps:

a) The steel pipe piles are connected and installed on the steel pipe piles to make steel pipe pile continuous wall components.

b) Position the steel pipe pile diaphragm wall to be constructed, fix the power unit, self-advancing drill rod, and self-advancing drill bit on the steel pipe pile of the steel pipe pile diaphragm wall, place the self-advancing drill bit on the bottom of the steel pipe pile, Install the power device on the upper part of the steel pipe pile, and connect the power device with the self-propelled drill bit through the self-propelled drill pipe;

c) Use the steel pipe pile of the steel pipe pile continuous wall as a pile frame to connect the steel pipe pile and the steel pipe pile attached to the steel pipe pile, power unit, self-propelled drill pipe, and self-propelled drill bit to adjust the drilling direction to be consistent;

d) Start the power device, transmit the rotational torque to the self-propelled drill bit through the self-propelled drill pipe, and carry out the soil drilling and disturbance construction at the position of the steel pipe pile through the rotation of the self-propelled drill bit; use the self-weight of the steel pipe pile and the steel pipe pile as the sink Pile force or as part of the pile sinking force, so that the steel pipe piles of the steel pipe pile diaphragm wall are inserted into the soil after drilling together with the steel pipe pile connections;

e) Repeat step a) to step d), insert the steel pipe piles one by one to connect with the steel pipe piles, and make the adjacent steel pipe piles connect through the steel pipe piles to form a continuous wall of steel pipe piles capable of retaining soil and water, completing the automatic Drilled steel pipe piles for diaphragm wall insertion construction.

In the above self-drilling steel pipe pile continuous wall construction method, in the above step d), the pile sinking force can be increased by one or more combinations of vibration, hammering and static pile pressing methods, and the steel pipe pile can be accelerated. Insertion construction of tubular pile diaphragm wall.

In the above-mentioned self-drilling steel pipe pile continuous wall construction method, in the above-mentioned step d), after the steel pipe pile and the steel pipe pile are connected and inserted into the soil, the power unit, the self-propelled drill rod, and the self-propelled drill bit can be inserted After dismantling, it is installed on the next steel pipe pile to realize the reuse of the three parts.

In the above-mentioned self-drilling steel pipe pile diaphragm wall construction method, the drilling disturbance construction in the above-mentioned step d) can be one or more of drilling construction, soil mixing construction or rotary grouting disturbance soil construction. kind of combination.

In the above step e), after the steel pipe pile diaphragm wall is inserted and constructed and used, the steel pipe pile diaphragm wall member is pulled out, and cement slurry is mixed into the drilled soil to harden the drilled soil .

The second object of the present invention is to provide a self-drilling steel pipe pile continuous wall used in the construction method of the self-drilling steel pipe pile continuous wall. The impact is small, the construction is convenient, and the cost is low.

The continuous wall of self-drilling steel pipe piles consists of seven parts: steel pipe piles, steel pipe pile connections, water-stop cavity, water-stop body, power unit, self-propelled drill bits, and self-progressive drill pipes. The main force-bearing structure bearing the water and soil pressure, the steel pipe pile is connected to the structure that transmits the earth pressure between the adjacent steel pipe piles to the steel pipe pile, and the water-stop cavity is the structure located between the adjacent steel pipe piles. At the joint of the pipe pile, the adjacent steel pipe pile or the member connected to the adjacent steel pipe pile is a cavity structure with a certain length along the joint direction. The water stop body is filled in the water stop cavity and can be sealed Objects that block the joints of adjacent steel pipe piles, the power device is a device installed on the steel pipe piles that can provide rotational torque, the self-advancing drill bit is a structure that is located at the bottom of the steel pipe piles to drill and loosen the soil, and the self-advancing drill pipe is Connected between the power unit and the self-propelled drill bit to transmit the power of the power unit to the rod-shaped structure of the self-propelled drill bit.

In the above-mentioned continuous wall of self-drilling steel pipe piles, one or more combinations of vibratory hammers, piling hammers, and static pile pressing devices can be installed on the above-mentioned steel pipe piles.

In the above self-drilling steel pipe pile continuous wall, a fluid injection device can be installed on the inner wall of the steel pipe pile, and the fluid injection device is a device for pouring water or mud or cement slurry into the drilling disturbed soil body.

In the above self-drilling steel pipe pile continuous wall, the above-mentioned conveying pipe can be connected to the side wall of the steel pipe pile along the steel pipe pile section.

In the above-mentioned self-drilling steel pipe pile continuous wall, the above-mentioned mud injection device includes two parts: a pressure pump and a delivery pipe.

In the above-mentioned self-drilling steel pipe pile continuous wall, the above-mentioned self-advancing drill bit can be one or a combination of spiral plate drill bits, stirring pile drill bits, bored pile drill bits, and rotary jetting pile drill bits.

The self-drilling steel pipe pile diaphragm wall insertion construction method and the self-drilling steel pipe pile diaphragm wall used in the present invention solve the problem of disturbing the soil during the construction process of the steel pipe pile diaphragm wall, and make the The difficulty of inserting the steel pipe pile diaphragm wall in hard soil is greatly reduced, and it is beneficial to reduce the pulling effect of the pile during the pulling out construction process of the steel pipe pile diaphragm wall. It is especially suitable for foundation pit engineering and hard soil with complex surrounding environments. Foundation pit engineering in land areas.

Description of drawings

Fig. 1 is a schematic diagram of the longitudinal section structure of the continuous wall of self-drilling steel pipe piles used in the first embodiment and the second embodiment of the present invention.

Fig. 2 is a schematic diagram of the cross-sectional structure of the self-drilling steel pipe pile continuous wall used in the first embodiment and the second embodiment of the present invention;

Detailed ways

As the first embodiment of the present invention shown in Figure 1 and Figure 2, the main purpose is to introduce the steel pipe pile diaphragm wall structure and working principle used in the self-drilling steel pipe pile diaphragm wall insertion construction method of the present invention . The continuous wall of self-drilling steel pipe piles includes steel pipe piles (1), steel pipe pile connections (2), water-stop cavities (3), water-stop bodies (4), power devices (5), self-propelled drill bits (6 ), self-advancing drill pipe (7) seven parts. The steel pipe pile (1) is the main force-bearing structure bearing water and soil pressure after the construction is completed, and the steel pipe pile (1) can be a round steel pipe or a square steel pipe. The steel pipe pile connection (2) is a structure located between adjacent steel pipe piles (1) and transmitting the earth pressure between the adjacent steel pipe piles (1) to the steel pipe piles (1). The steel pipe pile connection (2) can be composed of steel plates, steel pipes, and open steel pipes with C-shaped cross-sections, as shown in Figure 1 and Figure 2, and can be connected in a way of interlocking, or it can be a coil similar to the steel sheet pile interface. The boards are connected in the form of interlocking. The water-stop cavity (3) is located at the joint (8) between the adjacent steel pipe piles (1) and is formed by the adjacent steel pipe piles (1) or the components connected to the adjacent steel pipe piles (1). The side wall has a cavity structure with a certain length along the seam (8) direction. The side wall of the water-stop cavity (3) must contain the side walls of two adjacent steel pipe piles (1) or the upper member connected to the steel pipe pile (1), that is, the water-stop cavity (3) must be densely filled In the case of , the joints (8) between the adjacent steel pipe piles (1) corresponding to the water-stop cavity (3) must be blocked by the filling body. The water stop body (4) is an object that can be filled in the water stop cavity (3) and can block the joints (8) of adjacent steel pipe piles (1). The power device (5) is a device that is installed on the steel pipe pile (1) and can provide rotational torque. Power unit (5) can be electric motor, also can be the device by hydraulic pressure or pneumatic transmission. In this embodiment, one or more combinations of vibratory hammer (14), static pile pressing device or hammering device can be installed on the steel pipe pile (1) above to apply pile sinking force on the top of the steel pipe pile (1), The insertion construction speed of the steel pipe pile (1) is accelerated. The self-advancing drill bit (6) is a structure located at the bottom of the steel pipe pile (1) to drill and loosen the soil. The above-mentioned self-advancing drill bit (6) can be one or more combinations in the spiral plate drill bit, stirring drill bit, bored pile drill bit, and jet spray pile drill bit. If it is a spiral plate drill bit, it can also be drilled while disturbing the soil Provide pile sinking or pile pulling power to promote the sinking or lifting of the steel pipe pile (1). The self-propelled drill rod (7) is a rod-shaped structure connected between the power unit (5) and the self-propelled drill bit (6) to transmit the power of the power unit (5) to the self-propelled drill bit (6). In this embodiment, the soil drilling and disturbing construction can be carried out by a dry method, that is, the soil is drilled and disturbed and loosened by the drilling of the self-propelled drill bit (6); In the process of drilling and disturbing the soil with the drill bit (6), inject water, mud or cement slurry into the soil, so that the disturbed soil is stirred and diluted into mud or cement soil by the drilling of the drill bit (6) slurry to improve the drilling effect. In this embodiment, a fluid injection device (9) can be installed on the inner wall of the steel pipe pile (1), and the fluid injection device (9) is a device for injecting water or mud or cement slurry into the drilling disturbed soil body. The fluid perfusion device (9) consists of two parts: a pressure pump (10) and a delivery pipe (11). In this embodiment, the section of the delivery pipe (11) along the steel pipe pile (1) can be connected to the side wall of the steel pipe pile (1).

As the second embodiment of the present invention shown in Fig. 1 and Fig. 2, the main purpose is to introduce the self-drilling steel pipe pile continuous wall insertion construction method and construction steps of the present invention. The self-drilling steel pipe pile continuous wall construction method includes the following five steps. In the first step of this embodiment, the steel pipe pile (1) and the steel pipe pile connection (2) are connected as a whole to make a steel pipe pile continuous wall member, and its structure can be as shown in Figure 1 and Figure 2, Other forms as described for the first embodiment of the invention are also possible. Thereby, the first step of this embodiment is completed, and the second step is entered. In this step, the steel pipe pile diaphragm wall to be constructed is positioned, and the power unit (5), self-advancing drill pipe (7), and self-advancing drill bit (6) are fixed on the steel pipe pile (1) of the steel pipe pile diaphragm wall. ), the self-propelled drill bit (6) is installed on the bottom of the steel pipe pile (1), the power unit (5) is installed on the top of the steel pipe pile (1), and the power unit ( 5) Connect with the self-advancing drill bit (6), and the structural structure of the self-drilling steel pipe pile continuous wall member to be inserted into the construction after installation is shown in Figure 1 and Figure 2. The selection of each component can refer to the first part of the present invention. an example. The self-advancing drill bit (6) and the self-advancing drill pipe (7) can be installed in the hollow part of the steel pipe pile (1), so that the self-advancing drill bit (6) is located at the bottom of the steel pipe pile (1), and the self-advancing drill The lower end of the drill bit (6) is lower than the bottom of the steel pipe pile, so that the soil at the bottom of the steel pipe pile (1) can be disturbed by drilling before the steel pipe pile (1) is inserted. It is also possible to connect the power unit (5) with the self-propelled drill pipe (7) and the self-propelled drill bit (6) to form a whole with a fixed relative position, and to allow a certain distance between these three components and the steel pipe pile (1). Slide up and down inside, for example, fix the chute (12) on the inner wall of the steel pipe pile (1), so that the whole connected by the three parts can be connected between the steel pipe pile (1) under the control of the chute (12). It can slide up and down, but it cannot rotate relative to the steel pipe pile (1). Of course, the three parts can also be directly fixed with the steel pipe pile (1). Thereby finish the second step of this embodiment, enter the third step. In this step, the steel pipe pile (1) of the continuous wall of the steel pipe pile is used as a pile frame to connect the steel pipe pile (1) and the steel pipe pile attached to the steel pipe pile (1) (2), the power device ( 5), adjust the self-advancing drill pipe (7) and the self-advancing drill bit (6) until the drilling direction is consistent. Generally speaking, the continuous wall of steel pipe piles is constructed vertically, as long as the combination of the above-mentioned components is hoisted by a crane (13) and vertically lowered to the ground. Thus, the third step of this embodiment is completed, and the fourth step is entered. In this step, the power unit (5) is started, and the rotational torque is transmitted to the self-propelled drill bit (6) through the self-propelled drill rod (7). The steel pipe pile (1) and steel pipe pile connection (2) are used as the pile sinking force or as part of the pile sinking force at the same time, so that the steel pipe pile (1) of the steel pipe pile diaphragm wall together with the steel pipe pile The pipe pile connection (2) is inserted into the disturbed soil. In this step, the diameter of the self-advancing drill bit (6) can be slightly smaller than the inner diameter of the steel pipe pile (1), and the range of drilling disturbed soil is similar to that of the steel pipe pile through the swing of the self-advancing drill bit (6) during the drilling process. (1) have the same outer diameter. The drilling disturbance construction on the soil body in this step may be one or more combinations of drilling construction, soil mixing construction or rotary grouting disturbance soil construction. In this step, the pile sinking force can be increased by one or more combinations of hammering, vibration and static pile pressing devices, so as to speed up the insertion construction of the steel pipe pile diaphragm wall. After the steel pipe pile (1) and the steel pipe pile connection (2) are inserted into the soil, the power unit (5), the self-propelled drill pipe (7), and the self-propelled drill bit (6) can be removed and installed on the next steel pipe pile. On the pipe pile (1), the repeated use of the three parts is realized. Thereby, the fourth part of this embodiment is completed, and the fifth step is entered. In this step, step a) to step d) are repeated, the steel pipe piles (1) are inserted one by one to connect with the steel pipe piles (2), and the adjacent steel pipe piles (1) are connected to the steel pipe piles (2) ) form a steel pipe pile diaphragm wall capable of retaining soil and water, and complete the insertion construction of the self-drilling steel pipe pile diaphragm wall. The self-drilling steel pipe pile diaphragm wall construction method of the present invention, because the soil in the steel pipe pile (1) has been disturbed during the insertion construction, it is beneficial to the soil in the steel pipe pile (1) during the pulling out construction. The disturbed soil fills the pores left by the pile in time, thereby reducing the dragging settlement of the pile. When the soil in the steel pipe pile (1) is sufficiently drilled and disturbed, for example, mud has been formed by drilling and disturbed. When the steel pipe pile is pulled out or after it is pulled out, cement is mixed into the drilled soil to harden the loose soil after the pile is pulled out.

This patent includes but is not limited to other construction methods that can be used by professionals in this field.

Claims (6)

1. one kind is crept into steel pipe pile diaphragm wall certainly, it is characterized in that comprising steel pipe pile (1), steel pipe pile connects (2), sealing cavity (3), water-stop body (4), power set (5), from entering drill bit (6), from entering drilling rod (7) seven part, steel pipe pile (1) is wherein that consequence of having constructed is carried water the main force structure of soil pressure, steel pipe pile connects (2) for being positioned at the structure between adjacent steel pile tube (1), the soil pressure between adjacent steel pile tube (1) being passed to steel pipe pile (1), sealing cavity (3) is for being positioned at seam (8) place of adjacent steel pile tube (1) and take adjacent steel pile tube (1) or the component that is connected to adjacent steel pile tube (1) as the cavity structure having certain length along seam (8) direction of sidewall, water-stop body (4) is that be filled in sealing cavity (3) can the object of seam (8) of shutoff adjacent steel pile tube (1), power set (5) for being arranged on, steel pipe pile (1) can provide the device of rotating torque, for being positioned at steel pipe pile (1) bottom, soil body brill is disturbed loosening structure from entering drill bit (6), from entering drilling rod (7) for being connected to power set (5) and certainly entering the rod-like structure between drill bit (6), the power transmission of power set (5) being entered extremely certainly drill bit (6).

2. according to claim 1 from creeping into steel pipe pile diaphragm wall, it is characterized in that the one or more combination of installing on above-mentioned steel pipe pile (1) in vibrating hammer, pile hammer, silent piling device.

3. according to claim 1 from creeping into steel pipe pile diaphragm wall, it is characterized in that installing fluid filling device (9) at above-mentioned steel pipe pile (1) inwall, fluid filling device (9) is by water or mud or grouts in the device boring and disturb in the soil body.

4. according to claim 3 from creeping into steel pipe pile diaphragm wall, it is characterized in that above-mentioned fluid filling device (9) comprises compression pump (10) and carrier pipe (11) two parts.

5. according to claim 4 from creeping into steel pipe pile diaphragm wall, it is characterized in that above-mentioned carrier pipe (11) is connected along the sidewall of steel pipe pile (1) section with steel pipe pile (1).

6. according to claim 1 from creeping into steel pipe pile diaphragm wall, it is characterized in that above-mentioned certainly to enter drill bit (6) be one or more combination in spiral plate drill bit, agitation pile drill bit, drilled pile drill bit, rotary churning pile drill bit.