CN108951611B - Canal type cutting assembly type underground continuous wall and construction method - Google Patents
Canal type cutting assembly type underground continuous wall and construction method Download PDFInfo
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- CN108951611B CN108951611B CN201810803258.3A CN201810803258A CN108951611B CN 108951611 B CN108951611 B CN 108951611B CN 201810803258 A CN201810803258 A CN 201810803258A CN 108951611 B CN108951611 B CN 108951611B
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Abstract
The invention discloses a canal type cutting fabricated underground continuous wall and a construction method, and aims to provide a canal type cutting fabricated underground continuous wall and a construction method which can effectively shorten the construction period of foundation pit enclosure and reduce the occupied space of the foundation pit enclosure under the condition of ensuring the soil retaining capability and the water stopping capability of the foundation pit enclosure. The canal type cutting assembly type underground continuous wall comprises an underground cement soil continuous wall, and the underground water soil continuous wall is used for blocking underground water to form a foundation pit enclosure; and the assembly type wall body component is inserted in the underground cement continuous wall and comprises a plurality of vertical reinforced concrete prefabricated parts which are sequentially arranged and distributed along the length direction of the underground cement continuous wall, and two adjacent vertical reinforced concrete prefabricated parts are connected through a mortise and tenon structure.
Description
Technical Field
The invention relates to an underground continuous wall, in particular to a channel type cutting assembly type underground continuous wall and a construction method.
Background
The foundation pit construction of a building or a structure generally comprises the steps of firstly constructing the enclosure of the foundation pit and then excavating the foundation pit.
The types of foundation pit enclosure structures are more, and the following two foundation pit enclosure forms are generally adopted: firstly, soil is retained by a drilled pile, an underground cement-soil continuous wall is constructed on the outer side of the drilled pile, and the underground cement-soil continuous wall blocks underground water to form a foundation pit enclosure (such as a canal type cutting cement-soil wall); and secondly, earth is retained by the reinforced concrete underground continuous wall, and underground water is blocked by the underground cement continuous wall constructed on the outer side to form a foundation pit enclosure.
Above two kinds of foundation ditch enclosure forms commonly used all need to be under construction two kinds of stake, and the rigidity stake that is located the inboard is used for retaining soil, and the groundwater earth continuous wall that is located the outside is used for stagnant water, owing to have two rows of stakes, not only construction cycle extension when envelope construction, the space occupies great moreover.
Disclosure of Invention
The invention aims to provide a channel type cutting assembly type underground continuous wall and a construction method, which can effectively shorten the construction period of the foundation pit enclosure and reduce the occupied space of the foundation pit enclosure under the condition of ensuring the soil retaining capability and the water stopping capability of the foundation pit enclosure.
The technical scheme of the invention is as follows:
a trench cutting fabricated underground diaphragm wall comprising: the underground cement soil continuous wall is used for blocking underground water to form a foundation pit enclosure; the assembled wall body component comprises a plurality of vertical reinforced concrete prefabricated components which are sequentially arranged along the length direction of the underground cement continuous wall, two adjacent vertical reinforced concrete prefabricated components are connected through a mortise-tenon structure, the mortise-tenon structure comprises a vertical mortise arranged on the side face of one vertical reinforced concrete prefabricated component and a vertical tenon arranged on the side face of the other vertical reinforced concrete prefabricated component and matched with the vertical mortise, the upper end of the vertical mortise is communicated with the upper end face of the vertical reinforced concrete prefabricated component, the lower end of the vertical mortise is communicated with the lower end face of the vertical reinforced concrete prefabricated component, and the vertical tenon is matched with the corresponding vertical mortise.
The assembled wall body component is inserted into the underground water soil continuous wall of the channel type cutting assembled underground continuous wall, so that the strength of the channel type cutting assembled underground continuous wall can be guaranteed, when a foundation pit is excavated, the soil retaining capacity and the water stopping capacity of foundation pit support can be guaranteed only by constructing one channel type cutting assembled underground continuous wall, the safe excavation of the foundation pit is realized, the construction period of the foundation pit support is effectively shortened, and the occupied space of the foundation pit support is reduced.
On the other hand, the assembled wall body component is composed of a plurality of vertical reinforced concrete prefabricated components, two adjacent vertical reinforced concrete prefabricated components are connected through the tenon-and-mortise structure, and due to the assembled structure, finished product prefabrication can be carried out according to specifications, and on-site assembly construction is carried out, so that maintenance of concrete for manufacturing a reinforcement cage on site and pouring a reinforced concrete continuous wall is not needed, and the construction period can be further shortened.
Preferably, the vertical reinforced concrete prefabricated part consists of a plurality of sections of concrete prefabricated parts which are sequentially distributed from bottom to top, and each concrete prefabricated part comprises a concrete prefabricated part main body, an upper metal connecting end plate arranged at the upper end of the concrete prefabricated part main body and a lower metal connecting end plate arranged at the lower end of the concrete prefabricated part main body; in two adjacent concrete prefabricated components of same vertical reinforced concrete prefabricated part: and the upper metal connecting end plate of the concrete prefabricated part positioned below is connected with the lower metal connecting end plate of the concrete prefabricated part positioned above through welding.
The structure of the scheme is favorable for actual production and manufacture of the vertical reinforced concrete prefabricated member, and can sequentially place the concrete prefabricated members forming the vertical reinforced concrete prefabricated member into the underground cement continuous wall, and then connect the two adjacent concrete prefabricated members up and down through welding, so that the vertical reinforced concrete prefabricated member on site is favorable for being placed into the underground cement continuous wall.
Preferably, in the same precast concrete member: the upper metal connecting end plate is provided with vertical limiting rods, the lower metal connecting end plate is provided with end plate limiting holes which are in one-to-one correspondence with the vertical limiting rods, and the lower end face of the concrete prefabricated part main body is provided with main body limiting holes which are in one-to-one correspondence with the vertical limiting rods; in two adjacent concrete prefabricated components of same vertical reinforced concrete prefabricated part: the vertical limiting rod of the concrete prefabricated part positioned below is inserted into the end plate limiting hole and the main body limiting hole of the concrete prefabricated part positioned above.
This scheme structure is favorable to two adjacent concrete prefabricated component from top to bottom to connect according to setting for the requirement when the installation.
Preferably, the lengths of the concrete prefabricated components are the same, and in two adjacent vertical reinforced concrete prefabricated components: the height of the upper end face of one vertical reinforced concrete prefabricated member is higher than that of the upper end face of the other vertical reinforced concrete prefabricated member, and the distance between the upper end faces of the two adjacent vertical reinforced concrete prefabricated members is larger than the sum of the thickness of the lower metal connecting plate and the thickness of the upper metal connecting plate.
The vertical reinforced concrete prefabricated parts are composed of a plurality of sections of concrete prefabricated parts which are sequentially distributed from bottom to top, and two adjacent sections of concrete prefabricated parts are connected by welding, so that the same vertical reinforced concrete prefabricated part is provided with a plurality of connecting parts which are sequentially distributed from bottom to top (a connecting part is arranged between two adjacent sections of concrete prefabricated parts), once a part of the connecting parts in each vertical reinforced concrete prefabricated part of the assembly type wall body component are positioned at the same height, the overall strength of the assembly type wall body component can be reduced, and the assembly type wall body component is easily sheared and damaged at the connecting parts; in order to solve the problem, the inventor sets the lengths of the concrete prefabricated components to be the same, and enables the distance between the upper end faces of the two adjacent vertical reinforced concrete prefabricated components to be larger than the sum of the thickness of the lower metal connecting end plate and the thickness of the upper metal connecting end plate, so that the connecting parts of the two adjacent vertical reinforced concrete prefabricated components are vertically distributed in a staggered mode, a part of the connecting parts in each vertical reinforced concrete prefabricated component of the assembly type wall body component is prevented from being located at the same height, and the assembly type wall body component is prevented from being sheared and damaged at the connecting parts.
Preferably, the vertical tenon is composed of a plurality of vertical steel pipes which are sequentially distributed from bottom to top, a plurality of slurry passing holes which are sequentially distributed from bottom to top are formed in the outer side surface of each vertical steel pipe, the slurry passing holes are communicated with the inner cavity of the vertical steel pipe, the upper end and the lower end of each vertical steel pipe are provided with openings, the lower end of each vertical steel pipe is provided with a vertical splicing pipe, the outer diameter of each vertical splicing pipe is smaller than or equal to the inner diameter of the vertical steel pipe, and the vertical splicing pipe on the vertical steel pipe above the two adjacent vertical steel pipes is inserted into the upper end; the side surface of the concrete prefabricated part where the vertical tenon is located is provided with a vertical filling groove, the upper end of the vertical filling groove is communicated with the top surface of the concrete prefabricated part, the lower end of the vertical filling groove is communicated with the bottom surface of the concrete prefabricated part, a plurality of transverse reinforcing steel bars are sequentially distributed in the concrete prefabricated part from bottom to top, one end of one part of the transverse reinforcing steel bars extends out of the outer side of the side surface of the concrete prefabricated part to form a tenon connecting piece, the tenon connecting piece is located in the vertical filling groove, and the tenon connecting pieces are sequentially distributed from bottom to top along the length direction of the vertical filling groove; the vertical steel pipes in the same vertical tenon correspond to the concrete prefabricated parts in the same vertical reinforced concrete prefabricated part one by one, the vertical steel pipes are arranged on the side faces of the corresponding concrete prefabricated parts through tenon connecting parts, and the vertical steel pipes are connected with the tenon connecting parts on the corresponding concrete prefabricated parts through welding.
Because the inevitable gaps exist among the tenon-and-mortise structures, the inventor hopes to eliminate the gaps existing among the tenon-and-mortise structures so as to improve the water stopping capacity of the canal type cutting assembly type underground continuous wall; however, because the assembly type wall body component is composed of a plurality of vertical reinforced concrete prefabricated components, the problem is solved by how to arrange the grouting channel on the vertical reinforced concrete prefabricated components and ensure that the integrity and effectiveness of the grouting channel can be kept after the vertical reinforced concrete prefabricated components are inserted into the cement-soil continuous wall. In order to solve the problem, the inventor makes up the vertical tenon by a plurality of vertical steel pipes that distribute from bottom to top in proper order, the vertical grafting pipe on the vertical steel pipe that lies in the top in two adjacent vertical steel pipes is inserted and is established in the last port of the vertical steel pipe that lies in the below, and pass through the welding with the tenon connecting piece on the vertical steel pipe and the concrete prefabricated component that corresponds and link to each other, so can form a top-down's slip casting passageway, and after guaranteeing that vertical reinforced concrete prefabricated component inserts the soil cement diaphragm wall, can also keep the integrality and the validity of slip casting passageway, just so can realize the slip casting through the slip casting passageway that vertical tenon constitutes, eliminate the clearance that exists between the tenon fourth of twelve earthly branches structure, make assembled wall component have stagnant water ability simultaneously, thereby further improve the stagnant water ability of assembled underground diaphragm wall of ditch formula.
Preferably, in the same vertical reinforced concrete prefabricated member: the vertical mortise is arranged on one side face of the vertical reinforced concrete prefabricated part, the vertical tenon is arranged on the other side face of the vertical reinforced concrete prefabricated part, and the vertical mortise and the vertical tenon are positioned on two opposite sides of the vertical reinforced concrete prefabricated part.
Preferably, the vertical reinforced concrete prefabricated member is provided with at least one vertical through hole.
Preferably, the vertical tenon and the vertical reinforced concrete prefabricated member are integrally formed into the reinforced concrete prefabricated member.
A construction method of a channel type cutting assembly type underground continuous wall sequentially comprises the following steps:
constructing an underground cement-soil continuous wall on foundation soil;
in the construction process of the underground cement-soil continuous wall, after constructing an underground cement-soil continuous wall with a set length, constructing a corresponding assembly type wall body member in the underground cement-soil continuous wall;
the construction of the assembled wall body member sequentially comprises the following steps:
sequentially placing vertical reinforced concrete prefabricated members into the underground cement-soil continuous wall one by one along the length direction of the underground cement-soil continuous wall, wherein two adjacent vertical reinforced concrete prefabricated members are connected through a tenon-and-mortise structure, and vertical tenons of the tenon-and-mortise structure are inserted into corresponding vertical mortises;
wherein, the installation of same vertical reinforced concrete prefab includes following step in proper order:
a, hoisting a concrete prefabricated part by a crane and placing the concrete prefabricated part into an underground cement continuous wall;
b, hoisting another concrete prefabricated part and placing the concrete prefabricated part above the concrete prefabricated part placed in the underground cement continuous wall;
then, inserting a vertical limiting rod of the concrete prefabricated part positioned below into an end plate limiting hole and a main body limiting hole of the concrete prefabricated part positioned above;
then, connecting an upper metal connecting end plate of the concrete prefabricated component positioned below with a lower metal connecting end plate of the concrete prefabricated component positioned above by welding, so that the upper concrete prefabricated component and the lower concrete prefabricated component are connected into a whole, and then placing the integrally connected concrete prefabricated components into the underground cement-soil continuous wall;
and C, returning to the step B, hoisting, welding and placing the concrete prefabricated parts one by one until the design requirements are met, and finishing the installation of the vertical reinforced concrete prefabricated part.
The construction method of the canal type cutting assembly type underground continuous wall is characterized by further comprising a plurality of construction auxiliary devices, wherein the construction auxiliary devices comprise vertical filling steel pipes which correspond to concrete prefabricated parts one by one, the upper ends and the lower ends of the vertical filling steel pipes are closed, vertical studs are arranged at the upper ends of the vertical filling steel pipes, a connecting flat plate is arranged below the vertical filling steel pipes, the connecting flat plate is connected with the lower end faces of the vertical filling steel pipes through connecting rods, and stud through holes corresponding to the vertical studs are formed in the connecting flat plate;
the construction method of the canal type cutting assembly type underground continuous wall sequentially comprises the following steps:
constructing an underground cement-soil continuous wall on foundation soil;
in the construction process of the underground cement-soil continuous wall, after constructing an underground cement-soil continuous wall with a set length, constructing a corresponding assembly type wall body member in the underground cement-soil continuous wall;
the construction of the assembled wall body member sequentially comprises the following steps:
the first step, installing the first vertical reinforced concrete prefabricated member, the construction of installing the first vertical reinforced concrete prefabricated member sequentially comprises the following steps,
a, inserting vertical filling steel pipes into vertical mortises on concrete prefabricated parts of a first vertical reinforced concrete prefabricated part in a one-to-one correspondence manner, and filling the vertical mortises through the vertical filling steel pipes;
b, hoisting a concrete prefabricated part with a vertical filling steel pipe inserted into the vertical mortise by using a crane;
then, closing the lower end of the vertical filling steel pipe in the lifted concrete prefabricated part;
then, placing the concrete prefabricated part and the vertical filling steel pipe into the underground cement continuous wall together;
c, hoisting another concrete prefabricated part with a vertical filling steel pipe inserted into the vertical mortise, and placing the concrete prefabricated part above the concrete prefabricated part placed into the underground cement continuous wall;
then, inserting a vertical limiting rod of the concrete prefabricated part positioned below into an end plate limiting hole and a main body limiting hole of the concrete prefabricated part positioned above;
inserting the vertical splicing pipe on the vertical steel pipe positioned above into the upper port of the vertical steel pipe positioned below;
penetrating a vertical stud at the upper end of a vertical filling steel pipe below through a stud through hole of a connecting flat plate at the lower end of a vertical filling steel pipe above, and then connecting the vertical stud with a vertical stud above the connecting flat plate through a nut, so that an upper vertical filling steel pipe and a lower vertical filling steel pipe are connected into a whole;
then, connecting an upper metal connecting end plate of the concrete prefabricated component positioned below with a lower metal connecting end plate of the concrete prefabricated component positioned above by welding, so that the upper concrete prefabricated component and the lower concrete prefabricated component are connected into a whole; then, putting the concrete prefabricated part and the vertical filling steel pipe which are connected into a whole into the underground cement continuous wall;
d, returning to the step C, hoisting, welding and placing the concrete prefabricated components one by one until the first vertical reinforced concrete prefabricated component reaches the depth required by the design, and finishing the installation of the first vertical reinforced concrete prefabricated component;
secondly, pulling out the vertical filling steel pipes which are connected into a whole in the vertical mortises of the first vertical reinforced concrete prefabricated part through a crane;
thirdly, installing a second vertical reinforced concrete prefabricated part, wherein the construction for installing the second vertical reinforced concrete prefabricated part sequentially comprises the following steps,
a, inserting the vertical filling steel pipes into vertical mortises on a concrete prefabricated part of a second vertical reinforced concrete prefabricated part in a one-to-one correspondence manner, and filling the vertical mortises through the vertical filling steel pipes;
b, hoisting a concrete prefabricated part with a vertical filling steel pipe inserted into the vertical mortise by using a crane;
then, closing the lower end of the vertical filling steel pipe in the lifted concrete prefabricated part;
then, placing the concrete prefabricated part and the vertical filling steel pipe into the underground cement continuous wall together; simultaneously, inserting the vertical steel pipes on the concrete prefabricated components of the second vertical reinforced concrete prefabricated component into the vertical mortises of the concrete prefabricated components of the first vertical reinforced concrete prefabricated component;
c, hoisting another concrete prefabricated part with the vertical filling steel pipe inserted into the vertical mortise, and placing the concrete prefabricated part above the concrete prefabricated part of the second vertical reinforced concrete prefabricated part placed into the underground cement continuous wall;
then, inserting a vertical limiting rod of the concrete prefabricated part positioned below into an end plate limiting hole and a main body limiting hole of the concrete prefabricated part positioned above;
inserting the vertical splicing pipe on the vertical steel pipe positioned above into the upper port of the vertical steel pipe positioned below;
penetrating a vertical stud at the upper end of a vertical filling steel pipe below through a stud through hole of a connecting flat plate at the lower end of a vertical filling steel pipe above, and then connecting the vertical stud with a vertical stud above the connecting flat plate through a nut, so that an upper vertical filling steel pipe and a lower vertical filling steel pipe are connected into a whole;
then, connecting an upper metal connecting end plate of the concrete prefabricated component positioned below with a lower metal connecting end plate of the concrete prefabricated component positioned above by welding, so that the upper concrete prefabricated component and the lower concrete prefabricated component are connected into a whole; then, putting the concrete prefabricated part and the vertical filling steel pipe which are connected into a whole into the underground cement continuous wall; simultaneously, inserting the vertical steel pipes on the concrete prefabricated components of the second vertical reinforced concrete prefabricated component into the vertical mortises of the concrete prefabricated components of the first vertical reinforced concrete prefabricated component;
d, returning to the step C, hoisting, welding and placing the concrete prefabricated components one by one until the second vertical reinforced concrete prefabricated component reaches the depth required by the design, completing the installation of the second vertical reinforced concrete prefabricated component, and connecting the first vertical reinforced concrete prefabricated component and the second vertical reinforced concrete prefabricated component through a mortise and tenon structure;
fourthly, pulling out the vertical filling steel pipes which are connected into a whole in the vertical mortises of the second vertical reinforced concrete prefabricated part through a crane;
fifthly, returning to the third step, and sequentially installing the rest vertical reinforced concrete prefabricated parts according to the method of the third step and the method of the fourth step until the construction of the assembly type wall body component is completed;
sixthly, after the construction of the assembled wall body component is completed, grouting is carried out on partial or all tenon-and-mortise structures in the assembled wall body component, and the grouting construction of the tenon-and-mortise structures sequentially comprises the following steps:
a, adopting a grouting pump, injecting cement slurry into the vertical steel pipe from the upper port of the uppermost vertical steel pipe in the tenon-and-mortise structure, stopping the grouting pump when the grouting pressure of the grouting pump reaches a set pressure or the cement slurry overflows to the upper port of the uppermost vertical steel pipe in the tenon-and-mortise structure, and filling the vertical filling groove and the gap between the vertical steel pipe and the vertical mortise by the cement slurry through a slurry passing hole in the vertical steel pipe in the process;
and then, using a cork to plug the upper port of the vertical steel pipe positioned at the top in the tenon-and-mortise structure.
The invention has the beneficial effects that: the construction period of the foundation pit enclosure can be effectively shortened under the condition of ensuring the soil retaining capability and the water stopping capability of the foundation pit enclosure, and the occupied space of the foundation pit enclosure is reduced.
Drawings
Fig. 1 is a plan view of a trench cutting fabricated underground diaphragm wall of example 1 of the present invention.
Fig. 2 is a side view of an assembled wall component of embodiment 1 of the present invention.
Fig. 3 is a side view of a concrete precast element of embodiment 1 of the present invention.
Fig. 4 is a top view of fig. 3.
Fig. 5 is a side view of a concrete precast element of embodiment 3 of the present invention.
Fig. 6 is a top view of fig. 5.
FIG. 7 is a side view of a vertical fill steel tube of example 4 of the present invention.
Fig. 8 is a top view of fig. 7.
Fig. 9 is a plan view of a trench cutting fabricated underground diaphragm wall in the course of construction according to example 4 of the present invention.
In the figure:
underground cement continuous wall 1
Assembly type wall body component 2
The prefabricated concrete structure comprises a vertical reinforced concrete prefabricated part 3, a concrete prefabricated part 3.1, a concrete prefabricated part main body 3.11, an upper metal connecting end plate 3.12, a lower metal connecting end plate 3.13, a vertical limiting rod 3.14, an end plate limiting hole 3.15, a main body limiting hole 3.16, a vertical through hole 3.17, a vertical filling groove 3.18, a transverse steel bar 3.19 and a tenon connecting piece 3.20;
the structure comprises a tenon-and-mortise structure 4, a vertical mortise 4.0, a vertical tenon 4.1, a vertical steel pipe 4.11, a grout passing hole 4.12 and a vertical splicing pipe 4.13;
the steel tube comprises a vertical filling steel tube 5, a vertical stud 5.1, a connecting flat plate 5.2, a connecting rod 5.3 and a stud through hole 5.4.
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings:
example 1: as shown in fig. 1 and 2, a trench cutting fabricated underground diaphragm wall includes: the underground cement-soil continuous wall 1 is used for blocking underground water to form a foundation pit enclosure; and an assembly type wall member 2 inserted in the underground cemented soil continuous wall.
The assembled wall body component comprises a plurality of vertical reinforced concrete prefabricated parts 3 which are sequentially arranged and distributed along the length direction of the underground cement-soil continuous wall, and every two adjacent vertical reinforced concrete prefabricated parts are connected through a mortise-tenon joint structure 4.
As shown in fig. 1 and 4, the mortise and tenon structure comprises a vertical mortise 4.0 arranged on the side surface of one vertical reinforced concrete prefabricated member and a vertical tenon 4.1 arranged on the side surface of the other vertical reinforced concrete prefabricated member and matched with the vertical mortise. The upper end of the vertical mortise is communicated with the upper end face of the vertical reinforced concrete prefabricated member, and the lower end of the vertical mortise is communicated with the lower end face of the vertical reinforced concrete prefabricated member. The vertical tenons are matched with the corresponding vertical mortises.
The cross section of the vertical tenon is in a dovetail shape or a trapezoid shape or a T shape or a semicircular shape or a circular shape or an oval shape, and the cross section of the vertical tenon in the embodiment is in the dovetail shape. The cross section of the vertical mortise corresponds to that of the vertical tenon.
In the same vertical reinforced concrete prefabricated member: the vertical mortise is arranged on one side face of the vertical reinforced concrete prefabricated part, the vertical tenon is arranged on the other side face of the vertical reinforced concrete prefabricated part, and the vertical mortise and the vertical tenon are positioned on two opposite sides of the vertical reinforced concrete prefabricated part.
Two vertical through holes 3.17 are arranged on the vertical reinforced concrete prefabricated member. The upper end of the vertical through hole is communicated with the upper end face of the vertical reinforced concrete prefabricated member, and the lower end of the vertical through hole is communicated with the lower end face of the vertical reinforced concrete prefabricated member.
As shown in fig. 1, 2 and 3, the vertical reinforced concrete prefabricated member is composed of a plurality of concrete prefabricated members 3.1 which are sequentially distributed from bottom to top. The lengths of the concrete prefabricated parts are the same.
The concrete prefabricated part comprises a concrete prefabricated part main body 3.11, an upper metal connecting end plate 3.12 arranged at the upper end of the concrete prefabricated part main body and a lower metal connecting end plate 3.13 arranged at the lower end of the concrete prefabricated part main body.
In the same precast concrete unit: the upper metal connecting end plate is provided with vertical limiting rods 3.14, the lower metal connecting end plate is provided with end plate limiting holes 3.15 corresponding to the vertical limiting rods one by one, and the lower end face of the concrete prefabricated part main body is provided with main body limiting holes 3.16 corresponding to the vertical limiting rods one by one.
In two adjacent concrete prefabricated components of same vertical reinforced concrete prefabricated part: the vertical limiting rod of the concrete prefabricated part positioned below is inserted into the end plate limiting hole and the main body limiting hole of the concrete prefabricated part positioned above.
In two adjacent concrete prefabricated components of same vertical reinforced concrete prefabricated part: the upper metal connecting end plate of the concrete prefabricated part positioned below is connected with the lower metal connecting end plate of the concrete prefabricated part positioned above through welding and/or cementing (such as sulfur cement or epoxy resin cementing).
As shown in fig. 2, in two adjacent vertical reinforced concrete prefabricated members 3: the height of the upper end face of one vertical reinforced concrete prefabricated member is higher than that of the upper end face of the other vertical reinforced concrete prefabricated member. The distance between the upper end faces of two adjacent vertical reinforced concrete prefabricated parts is larger than the sum of the thickness of the lower metal connecting end plate and the thickness of the upper metal connecting end plate. In the embodiment, the distance between the upper end surfaces of two adjacent vertical reinforced concrete prefabricated members is 10-100 cm. The upper metal connecting end plate and the lower metal connecting end plate have the same thickness. The thickness of the upper metal connecting end plate is 0.5-2 cm.
The vertical reinforced concrete prefabricated parts are composed of a plurality of sections of concrete prefabricated parts which are sequentially distributed from bottom to top, and two adjacent sections of concrete prefabricated parts are connected by welding, so that the same vertical reinforced concrete prefabricated part is provided with a plurality of connecting parts which are sequentially distributed from bottom to top (a connecting part is arranged between two adjacent sections of concrete prefabricated parts), once a part of the connecting parts in each vertical reinforced concrete prefabricated part of the assembly type wall body component are positioned at the same height, the overall strength of the assembly type wall body component can be reduced, and the assembly type wall body component is easily sheared and damaged at the connecting parts; in order to solve the problem, the inventor sets the lengths of the concrete prefabricated components to be the same, and enables the distance between the upper end faces of the two adjacent vertical reinforced concrete prefabricated components to be larger than the sum of the thickness of the lower metal connecting end plate and the thickness of the upper metal connecting end plate, so that the connecting parts of the two adjacent vertical reinforced concrete prefabricated components are vertically distributed in a staggered mode, a part of the connecting parts in each vertical reinforced concrete prefabricated component of the assembly type wall body component is prevented from being located at the same height, and the assembly type wall body component is prevented from being sheared and damaged at the connecting parts.
In this embodiment, the vertical tenon and the vertical reinforced concrete prefabricated member are integrally formed reinforced concrete prefabricated members.
Example 2: a construction method of a trench cutting fabricated underground continuous wall, the concrete structure of the trench cutting fabricated underground continuous wall of the embodiment refers to embodiment 1.
The construction method of the canal type cutting assembly type underground continuous wall sequentially comprises the following steps:
as shown in fig. 1, an underground cemented soil continuous wall 1, such as a trench cut cemented soil wall, is constructed on foundation soil.
In the process of constructing the underground cemented soil continuous wall, after each section of the underground cemented soil continuous wall with a set length is constructed (for example, after each section of the underground cemented soil continuous wall with the set length of 5-10 meters is constructed), the corresponding assembly type wall body component 2 is constructed in the section of the underground cemented soil continuous wall.
The construction of the assembled wall body member sequentially comprises the following steps:
the vertical reinforced concrete prefabricated members are sequentially placed into the underground cement-soil continuous wall one by one along the length direction of the underground cement-soil continuous wall, and the two adjacent vertical reinforced concrete prefabricated members are connected through the tenon-and-mortise structure, namely, the vertical tenons are inserted into the corresponding vertical mortises.
Wherein, the installation of same vertical reinforced concrete prefab includes following step in proper order:
a, hoisting a concrete prefabricated part by a crane and placing the concrete prefabricated part into an underground cement continuous wall;
b, hoisting another concrete prefabricated part and placing the concrete prefabricated part above the concrete prefabricated part placed in the underground cement continuous wall;
then, inserting a vertical limiting rod of the concrete prefabricated part positioned below into an end plate limiting hole and a main body limiting hole of the concrete prefabricated part positioned above;
then, connecting an upper metal connecting end plate of the concrete prefabricated component positioned below with a lower metal connecting end plate of the concrete prefabricated component positioned above by welding, so that the upper concrete prefabricated component and the lower concrete prefabricated component are connected into a whole, and then placing the integrally connected concrete prefabricated components into the underground cement-soil continuous wall;
and C, returning to the step B, hoisting, welding and placing the concrete prefabricated parts one by one until the design requirements are met, and finishing the installation of the vertical reinforced concrete prefabricated part.
Example 3, the remaining structure of this example refers to example 1, with the following differences:
as shown in fig. 5 and 6, the vertical tenon is composed of a plurality of vertical steel pipes 4.11 which are distributed from bottom to top in sequence. The outer side surface of the vertical steel pipe is provided with a plurality of slurry passing holes 4.12 which are distributed from bottom to top in sequence, and the slurry passing holes are communicated with the inner cavity of the vertical steel pipe.
The vertical steel pipe is a round pipe. The upper and lower both ends of vertical steel pipe are open. The lower end of the vertical steel pipe is provided with a vertical splicing pipe 4.13. The outer diameter of the vertical splicing pipe is less than or equal to the inner diameter of the vertical steel pipe. The vertical splicing pipe on the vertical steel pipe above the two adjacent vertical steel pipes is inserted into the upper port of the vertical steel pipe below the vertical steel pipe.
And a vertical filling groove 3.18 is formed in the side face of the concrete prefabricated part where the vertical tenon is located. The upper end of the vertical filling groove is communicated with the top surface of the concrete prefabricated part, and the lower end of the vertical filling groove is communicated with the bottom surface of the concrete prefabricated part.
The concrete prefabricated part is internally provided with a plurality of transverse reinforcing steel bars 3.19 which are sequentially distributed from bottom to top, wherein one end of one part of the transverse reinforcing steel bars extends out of the outer side of the side surface of the concrete prefabricated part and forms a tenon joint part 3.20. The tenon connecting pieces are positioned in the vertical filling grooves and are sequentially distributed from bottom to top along the length direction of the vertical filling grooves.
And the vertical steel pipes in the same vertical tenon correspond to the concrete prefabricated parts in the same vertical reinforced concrete prefabricated part one by one. The vertical steel pipes are arranged on the side faces of the corresponding concrete prefabricated parts through tenon connecting pieces, and the vertical steel pipes are connected with the corresponding tenon connecting pieces on the concrete prefabricated parts through welding.
Because the inevitable gaps exist among the tenon-and-mortise structures, the inventor hopes to eliminate the gaps existing among the tenon-and-mortise structures so as to improve the water stopping capacity of the canal type cutting assembly type underground continuous wall; however, because the assembly type wall body component is composed of a plurality of vertical reinforced concrete prefabricated components, the problem is solved by how to arrange the grouting channel on the vertical reinforced concrete prefabricated components and ensure that the integrity and effectiveness of the grouting channel can be kept after the vertical reinforced concrete prefabricated components are inserted into the cement-soil continuous wall. In order to solve the problem, the inventor makes up the vertical tenon by a plurality of vertical steel pipes that distribute from bottom to top in proper order, the vertical grafting pipe on the vertical steel pipe that lies in the top in two adjacent vertical steel pipes is inserted and is established in the last port of the vertical steel pipe that lies in the below, and pass through the welding with the tenon connecting piece on the vertical steel pipe and the concrete prefabricated component that corresponds and link to each other, so can form a top-down's slip casting passageway, and after guaranteeing that vertical reinforced concrete prefabricated component inserts the soil cement diaphragm wall, can also keep the integrality and the validity of slip casting passageway, just so can realize the slip casting through the slip casting passageway that vertical tenon constitutes, eliminate the clearance that exists between the tenon fourth of twelve earthly branches structure, make assembled wall component have stagnant water ability simultaneously, thereby further improve the stagnant water ability of assembled underground diaphragm wall of ditch formula.
Example 4: a construction method of a trench cutting fabricated underground continuous wall, the concrete structure of the trench cutting fabricated underground continuous wall of the embodiment refers to embodiment 3.
As shown in fig. 7 and 8, the construction method of the trench cutting fabricated underground diaphragm wall further includes a plurality of construction auxiliary devices. The construction auxiliary device comprises a plurality of vertical filling steel pipes 5, and the vertical filling steel pipes of the same construction auxiliary device correspond to the concrete prefabricated parts on the same vertical reinforced concrete prefabricated part one by one. The upper and lower ends of the vertical filling steel pipe are closed. The upper end of the vertical filling steel pipe is provided with a vertical stud 5.1. A connecting flat plate 5.2 is arranged below the vertical filling steel pipe. The lower end faces of the connecting flat plate and the vertical filling steel pipe are connected through a connecting rod 5.3. Stud through holes 5.4 corresponding to the vertical studs are arranged on the connecting flat plate.
As shown in fig. 9, the construction method of the trench cutting fabricated underground diaphragm wall of the present embodiment sequentially includes the following steps:
and constructing the underground cement soil continuous wall 1 on the foundation soil.
In the process of constructing the underground cemented soil continuous wall, after each section of the underground cemented soil continuous wall with a set length is constructed (for example, after each section of the underground cemented soil continuous wall with the set length of 5-10 meters is constructed), the corresponding assembly type wall body component 2 is constructed in the section of the underground cemented soil continuous wall.
The construction of the assembled wall body member sequentially comprises the following steps:
the first step, installing the first vertical reinforced concrete prefabricated member, the construction of installing the first vertical reinforced concrete prefabricated member sequentially comprises the following steps,
and A, inserting the vertical filling steel pipes 5 into the vertical mortises on the concrete prefabricated parts of the first vertical reinforced concrete prefabricated part in a one-to-one correspondence manner, and filling the vertical mortises through the vertical filling steel pipes.
B, hoisting a concrete prefabricated part with a vertical filling steel pipe inserted into the vertical mortise by using a crane;
then, closing the lower end of the vertical filling steel pipe in the lifted concrete prefabricated part;
and then, placing the concrete prefabricated part and the vertical filling steel pipe into the underground cement continuous wall together.
Because the vertical filling steel pipe fills the vertical mortise, the stone in the cement can be prevented from entering the vertical mortise in the process of placing the concrete prefabricated part and the vertical filling steel pipe into the underground cement continuous wall.
C, hoisting another concrete prefabricated part with a vertical filling steel pipe inserted into the vertical mortise, and placing the concrete prefabricated part above the concrete prefabricated part placed into the underground cement continuous wall;
then, inserting a vertical limiting rod of the concrete prefabricated part positioned below into an end plate limiting hole and a main body limiting hole of the concrete prefabricated part positioned above;
inserting the vertical splicing pipe on the vertical steel pipe above into the upper port of the vertical steel pipe below, so as to communicate the upper and lower sections of vertical steel pipes;
penetrating a vertical stud at the upper end of a vertical filling steel pipe below through a stud through hole of a connecting flat plate at the lower end of a vertical filling steel pipe above, and then connecting the vertical stud with a vertical stud above the connecting flat plate through a nut, so that an upper vertical filling steel pipe and a lower vertical filling steel pipe are connected into a whole;
then, connecting an upper metal connecting end plate of the concrete prefabricated component positioned below with a lower metal connecting end plate of the concrete prefabricated component positioned above by welding, so that the upper concrete prefabricated component and the lower concrete prefabricated component are connected into a whole; and then, putting the integrated concrete prefabricated part and the vertical filling steel pipe into the underground cement-soil continuous wall.
And D, returning to the step C, hoisting, welding and placing the concrete prefabricated components one by one until the first vertical reinforced concrete prefabricated component reaches the depth required by the design, and finishing the installation of the first vertical reinforced concrete prefabricated component.
And secondly, pulling out the vertical filling steel pipes connected into a whole in the vertical mortises of the first vertical reinforced concrete prefabricated part through a crane.
Thirdly, installing a second vertical reinforced concrete prefabricated part, wherein the construction for installing the second vertical reinforced concrete prefabricated part sequentially comprises the following steps,
a, inserting the vertical filling steel pipes into vertical mortises on a concrete prefabricated part of a second vertical reinforced concrete prefabricated part in a one-to-one correspondence manner, and filling the vertical mortises through the vertical filling steel pipes;
b, hoisting a concrete prefabricated part with a vertical filling steel pipe inserted into the vertical mortise by using a crane;
then, closing the lower end of the vertical filling steel pipe in the lifted concrete prefabricated part;
then, placing the concrete prefabricated part and the vertical filling steel pipe into the underground cement continuous wall together; and simultaneously, inserting the vertical steel pipes on the concrete prefabricated parts of the second vertical reinforced concrete prefabricated part into the vertical mortises of the concrete prefabricated parts of the first vertical reinforced concrete prefabricated part.
C, hoisting another concrete prefabricated part with the vertical filling steel pipe inserted into the vertical mortise, and placing the concrete prefabricated part above the concrete prefabricated part of the second vertical reinforced concrete prefabricated part placed into the underground cement continuous wall;
then, inserting a vertical limiting rod of the concrete prefabricated part positioned below into an end plate limiting hole and a main body limiting hole of the concrete prefabricated part positioned above;
inserting the vertical splicing pipe on the vertical steel pipe positioned above into the upper port of the vertical steel pipe positioned below;
penetrating a vertical stud at the upper end of a vertical filling steel pipe below through a stud through hole of a connecting flat plate at the lower end of a vertical filling steel pipe above, and then connecting the vertical stud with a vertical stud above the connecting flat plate through a nut, so that an upper vertical filling steel pipe and a lower vertical filling steel pipe are connected into a whole;
then, connecting an upper metal connecting end plate of the concrete prefabricated component positioned below with a lower metal connecting end plate of the concrete prefabricated component positioned above by welding, so that the upper concrete prefabricated component and the lower concrete prefabricated component are connected into a whole; then, putting the concrete prefabricated part and the vertical filling steel pipe which are connected into a whole into the underground cement continuous wall; and simultaneously, inserting the vertical steel pipes on the concrete prefabricated parts of the second vertical reinforced concrete prefabricated part into the vertical mortises of the concrete prefabricated parts of the first vertical reinforced concrete prefabricated part.
And D, returning to the step C, hoisting, welding and placing the concrete prefabricated components one by one until the second vertical reinforced concrete prefabricated component reaches the depth required by the design, completing the installation of the second vertical reinforced concrete prefabricated component, and connecting the first vertical reinforced concrete prefabricated component and the second vertical reinforced concrete prefabricated component through a mortise and tenon joint structure.
Because the vertical filling steel pipes are filled in the vertical mortises, stones in the cement can be prevented from entering the vertical mortises in the process of placing the concrete prefabricated part and the vertical filling steel pipes into the underground cement continuous wall; after the vertical filling steel pipe is pulled out, the second vertical reinforced concrete prefabricated part is immediately installed, so that the vertical tenon of the second vertical reinforced concrete prefabricated part is inserted into the vertical mortise of the first vertical reinforced concrete prefabricated part, and the problem that stones in cement soil enter the vertical mortise to influence the installation of the second vertical reinforced concrete prefabricated part and even lead to the fact that the second vertical reinforced concrete prefabricated part cannot be smoothly installed can be effectively avoided.
And fourthly, pulling out the vertical filling steel pipes which are connected into a whole in the vertical mortises of the second vertical reinforced concrete prefabricated part through a crane.
And fifthly, returning to the third step, and sequentially installing the rest vertical reinforced concrete prefabricated parts according to the method of the third step and the method of the fourth step until the construction of the assembly type wall body member is completed.
Sixthly, after the construction of the assembled wall body component is completed, grouting is carried out on partial or all tenon-and-mortise structures in the assembled wall body component, and the grouting construction of the tenon-and-mortise structures sequentially comprises the following steps:
a, adopting a grouting pump, injecting cement slurry into the vertical steel pipe from the upper port of the uppermost vertical steel pipe in the tenon-and-mortise structure, stopping the grouting pump when the grouting pressure of the grouting pump reaches a set pressure or the cement slurry overflows to the upper port of the uppermost vertical steel pipe in the tenon-and-mortise structure, and filling the vertical filling groove and the gap between the vertical steel pipe and the vertical mortise by the cement slurry through a slurry passing hole in the vertical steel pipe in the process;
and then, using a cork to plug the upper port of the vertical steel pipe positioned at the top in the tenon-and-mortise structure.
The vertical tenon is composed of a plurality of vertical steel pipes which are sequentially distributed from bottom to top, the vertical splicing pipe on the vertical steel pipe positioned above the two adjacent vertical steel pipes is inserted into the upper port of the vertical steel pipe positioned below the vertical steel pipes, and the vertical steel pipes are connected with the tenon connecting piece on the corresponding concrete prefabricated component through welding, so that a top-down grouting channel can be formed, and after the vertical reinforced concrete prefabricated component is inserted into the cement continuous wall, the integrity and the effectiveness of the grouting channel can be kept, so that the grouting channel composed of the vertical tenons can be used, a cement slurry injection mode can be adopted, grouting is realized, gaps existing among tenon-and-mortise structures are eliminated, the assembled wall component has water stopping capacity, and the water stopping capacity of the canal type cutting assembled underground continuous wall is further improved.
On the other hand, because the setting of vertical filling groove, and the tenon connecting piece is located vertical filling groove, so fill up vertical filling groove and the clearance between vertical steel pipe and the vertical tongue-and-groove at cement thick liquid and solidify the back, will form two tenon fourth of the twelve earthly branches structures that each other is as an organic whole, one of them tenon fourth of the twelve earthly branches structure is vertical steel pipe and vertical tongue-and-groove cooperation formation that vertical tenon structure and vertical filling groove constitute for vertical steel pipe component, another tenon fourth of the twelve earthly branches structure is vertical steel pipe, the tenon structure that the grout of solidification and the grout of vertical filling groove internal solidification constitute jointly forms, further effectual connection structure stability between two adjacent vertical reinforced concrete prefabs of improvement, and then improve the structural stability and the soil-blocking ability of assembled wall body component.
Claims (6)
1. A construction method of a canal cutting assembly type underground continuous wall is characterized in that,
this assembled underground continuous wall of canal cutting includes:
the underground cement soil continuous wall is used for blocking underground water to form a foundation pit enclosure; and
an assembled wall body component inserted in the underground cement continuous wall,
the assembled wall body component comprises a plurality of vertical reinforced concrete prefabricated parts which are sequentially distributed along the length direction of the underground cement continuous wall, and every two adjacent vertical reinforced concrete prefabricated parts are connected through a mortise-tenon structure, each mortise-tenon structure comprises a vertical mortise arranged on the side surface of one vertical reinforced concrete prefabricated part and a vertical tenon arranged on the side surface of the other vertical reinforced concrete prefabricated part and matched with the vertical mortise, the upper end of each vertical mortise is communicated with the upper end surface of each vertical reinforced concrete prefabricated part, the lower end of each vertical mortise is communicated with the lower end surface of each vertical reinforced concrete prefabricated part, and each vertical tenon is matched with the corresponding vertical mortise;
the vertical reinforced concrete prefabricated part consists of a plurality of sections of concrete prefabricated parts which are sequentially distributed from bottom to top, and each concrete prefabricated part comprises a concrete prefabricated part main body, an upper metal connecting end plate arranged at the upper end of the concrete prefabricated part main body and a lower metal connecting end plate arranged at the lower end of the concrete prefabricated part main body;
in two adjacent concrete prefabricated components of same vertical reinforced concrete prefabricated part: the upper metal connecting end plate of the concrete prefabricated part positioned below is connected with the lower metal connecting end plate of the concrete prefabricated part positioned above through welding;
the vertical tenon is composed of a plurality of vertical steel pipes which are sequentially distributed from bottom to top, a plurality of slurry passing holes which are sequentially distributed from bottom to top are formed in the outer side surface of each vertical steel pipe, the slurry passing holes are communicated with the inner cavity of the vertical steel pipe, the upper end and the lower end of each vertical steel pipe are open, a vertical inserting pipe is arranged at the lower end of each vertical steel pipe, the outer diameter of each vertical inserting pipe is smaller than or equal to the inner diameter of each vertical steel pipe, and the vertical inserting pipe on the vertical steel pipe positioned above the two adjacent vertical steel pipes is inserted into the upper end opening;
the side surface of the concrete prefabricated part where the vertical tenon is positioned is provided with a vertical filling groove, the upper end of the vertical filling groove is communicated with the top surface of the concrete prefabricated part, the lower end of the vertical filling groove is communicated with the bottom surface of the concrete prefabricated part,
the concrete prefabricated part is internally provided with a plurality of transverse reinforcing steel bars which are sequentially distributed from bottom to top, one end of one part of the transverse reinforcing steel bars extends out of the outer side of the side surface of the concrete prefabricated part and forms a tenon connecting piece, the tenon connecting piece is positioned in the vertical filling groove, and the tenon connecting pieces are sequentially distributed from bottom to top along the length direction of the vertical filling groove;
the vertical steel pipes in the same vertical tenon correspond to the concrete prefabricated parts in the same vertical reinforced concrete prefabricated part one by one, the vertical steel pipes are arranged on the side surfaces of the corresponding concrete prefabricated parts through tenon connecting parts, and the vertical steel pipes are connected with the tenon connecting parts on the corresponding concrete prefabricated parts through welding;
the construction method of the canal type cutting assembly type underground continuous wall further comprises a plurality of construction auxiliary devices, wherein the construction auxiliary devices comprise vertical filling steel pipes which correspond to the concrete prefabricated parts one by one, the upper ends and the lower ends of the vertical filling steel pipes are closed, vertical studs are arranged at the upper ends of the vertical filling steel pipes, a connecting flat plate is arranged below the vertical filling steel pipes, the connecting flat plate is connected with the lower end faces of the vertical filling steel pipes through connecting rods, and stud through holes corresponding to the vertical studs are formed in the connecting flat plate;
the construction method of the canal type cutting assembly type underground continuous wall sequentially comprises the following steps:
constructing an underground cement-soil continuous wall on foundation soil;
in the construction process of the underground cement-soil continuous wall, after constructing an underground cement-soil continuous wall with a set length, constructing a corresponding assembly type wall body member in the underground cement-soil continuous wall;
the construction of the assembled wall body member sequentially comprises the following steps:
the first step, installing the first vertical reinforced concrete prefabricated member, the construction of installing the first vertical reinforced concrete prefabricated member sequentially comprises the following steps,
a, inserting vertical filling steel pipes into vertical mortises on concrete prefabricated parts of a first vertical reinforced concrete prefabricated part in a one-to-one correspondence manner, and filling the vertical mortises through the vertical filling steel pipes;
b, hoisting a concrete prefabricated part with a vertical filling steel pipe inserted into the vertical mortise by using a crane;
then, closing the lower end of the vertical filling steel pipe in the lifted concrete prefabricated part;
then, placing the concrete prefabricated part and the vertical filling steel pipe into the underground cement continuous wall together;
c, hoisting another concrete prefabricated part with a vertical filling steel pipe inserted into the vertical mortise, and placing the concrete prefabricated part above the concrete prefabricated part placed into the underground cement continuous wall;
then, inserting a vertical limiting rod of the concrete prefabricated part positioned below into an end plate limiting hole and a main body limiting hole of the concrete prefabricated part positioned above;
inserting the vertical splicing pipe on the vertical steel pipe positioned above into the upper port of the vertical steel pipe positioned below;
penetrating a vertical stud at the upper end of a vertical filling steel pipe below through a stud through hole of a connecting flat plate at the lower end of a vertical filling steel pipe above, and then connecting the vertical stud with a vertical stud above the connecting flat plate through a nut, so that an upper vertical filling steel pipe and a lower vertical filling steel pipe are connected into a whole;
then, connecting an upper metal connecting end plate of the concrete prefabricated component positioned below with a lower metal connecting end plate of the concrete prefabricated component positioned above by welding, so that the upper concrete prefabricated component and the lower concrete prefabricated component are connected into a whole; then, putting the concrete prefabricated part and the vertical filling steel pipe which are connected into a whole into the underground cement continuous wall;
d, returning to the step C, hoisting, welding and placing the concrete prefabricated components one by one until the first vertical reinforced concrete prefabricated component reaches the depth required by the design, and finishing the installation of the first vertical reinforced concrete prefabricated component;
secondly, pulling out the vertical filling steel pipes which are connected into a whole in the vertical mortises of the first vertical reinforced concrete prefabricated part through a crane;
thirdly, installing a second vertical reinforced concrete prefabricated part, wherein the construction for installing the second vertical reinforced concrete prefabricated part sequentially comprises the following steps,
a, inserting the vertical filling steel pipes into vertical mortises on a concrete prefabricated part of a second vertical reinforced concrete prefabricated part in a one-to-one correspondence manner, and filling the vertical mortises through the vertical filling steel pipes;
b, hoisting a concrete prefabricated part with a vertical filling steel pipe inserted into the vertical mortise by using a crane;
then, closing the lower end of the vertical filling steel pipe in the lifted concrete prefabricated part;
then, placing the concrete prefabricated part and the vertical filling steel pipe into the underground cement continuous wall together; simultaneously, inserting the vertical steel pipes on the concrete prefabricated components of the second vertical reinforced concrete prefabricated component into the vertical mortises of the concrete prefabricated components of the first vertical reinforced concrete prefabricated component;
c, hoisting another concrete prefabricated part with the vertical filling steel pipe inserted into the vertical mortise, and placing the concrete prefabricated part above the concrete prefabricated part of the second vertical reinforced concrete prefabricated part placed into the underground cement continuous wall;
then, inserting a vertical limiting rod of the concrete prefabricated part positioned below into an end plate limiting hole and a main body limiting hole of the concrete prefabricated part positioned above;
inserting the vertical splicing pipe on the vertical steel pipe positioned above into the upper port of the vertical steel pipe positioned below;
penetrating a vertical stud at the upper end of a vertical filling steel pipe below through a stud through hole of a connecting flat plate at the lower end of a vertical filling steel pipe above, and then connecting the vertical stud with a vertical stud above the connecting flat plate through a nut, so that an upper vertical filling steel pipe and a lower vertical filling steel pipe are connected into a whole;
then, connecting an upper metal connecting end plate of the concrete prefabricated component positioned below with a lower metal connecting end plate of the concrete prefabricated component positioned above by welding, so that the upper concrete prefabricated component and the lower concrete prefabricated component are connected into a whole; then, putting the concrete prefabricated part and the vertical filling steel pipe which are connected into a whole into the underground cement continuous wall; simultaneously, inserting the vertical steel pipes on the concrete prefabricated components of the second vertical reinforced concrete prefabricated component into the vertical mortises of the concrete prefabricated components of the first vertical reinforced concrete prefabricated component;
d, returning to the step C, hoisting, welding and placing the concrete prefabricated components one by one until the second vertical reinforced concrete prefabricated component reaches the depth required by the design, completing the installation of the second vertical reinforced concrete prefabricated component, and connecting the first vertical reinforced concrete prefabricated component and the second vertical reinforced concrete prefabricated component through a mortise and tenon structure;
fourthly, pulling out the vertical filling steel pipes which are connected into a whole in the vertical mortises of the second vertical reinforced concrete prefabricated part through a crane;
fifthly, returning to the third step, and sequentially installing the rest vertical reinforced concrete prefabricated parts according to the method of the third step and the method of the fourth step until the construction of the assembly type wall body component is completed;
sixthly, after the construction of the assembled wall body component is completed, grouting is carried out on partial or all tenon-and-mortise structures in the assembled wall body component, and the grouting construction of the tenon-and-mortise structures sequentially comprises the following steps:
a, adopting a grouting pump, injecting cement slurry into the vertical steel pipe from the upper port of the uppermost vertical steel pipe in the tenon-and-mortise structure, stopping the grouting pump when the grouting pressure of the grouting pump reaches a set pressure or the cement slurry overflows to the upper port of the uppermost vertical steel pipe in the tenon-and-mortise structure, filling the cement slurry into the vertical filling groove and the gap between the vertical steel pipe and the vertical mortise through a slurry passing hole in the vertical steel pipe in the process, and filling the vertical filling groove and the gap between the vertical steel pipe and the vertical mortise;
and then, using a cork to plug the upper port of the vertical steel pipe positioned at the top in the tenon-and-mortise structure.
2. The construction method of a trench cutting fabricated underground diaphragm wall as claimed in claim 1, wherein, in the same concrete prefabricated member: the upper metal connecting end plate is provided with vertical limiting rods, the lower metal connecting end plate is provided with end plate limiting holes which are in one-to-one correspondence with the vertical limiting rods, and the lower end face of the concrete prefabricated part main body is provided with main body limiting holes which are in one-to-one correspondence with the vertical limiting rods;
in two adjacent concrete prefabricated components of same vertical reinforced concrete prefabricated part: the vertical limiting rod of the concrete prefabricated part positioned below is inserted into the end plate limiting hole and the main body limiting hole of the concrete prefabricated part positioned above.
3. The method of constructing a trench cut fabricated underground diaphragm wall as claimed in claim 1 or 2, wherein the concrete precast elements have the same length,
in two adjacent vertical reinforced concrete prefabricates: the height of the upper end face of one vertical reinforced concrete prefabricated member is higher than that of the upper end face of the other vertical reinforced concrete prefabricated member, and the distance between the upper end faces of the two adjacent vertical reinforced concrete prefabricated members is larger than the sum of the thickness of the lower metal connecting plate and the thickness of the upper metal connecting plate.
4. The construction method of the trench cutting fabricated underground diaphragm wall as claimed in claim 1 or 2, wherein in the same vertical reinforced concrete prefabricated member: the vertical mortise is arranged on one side face of the vertical reinforced concrete prefabricated part, the vertical tenon is arranged on the other side face of the vertical reinforced concrete prefabricated part, and the vertical mortise and the vertical tenon are positioned on two opposite sides of the vertical reinforced concrete prefabricated part.
5. The construction method of the trench cutting fabricated underground diaphragm wall as claimed in claim 1 or 2, wherein the vertical reinforced concrete prefabricated member is provided with at least one vertical through hole.
6. The construction method of the trench cutting fabricated underground diaphragm wall as claimed in claim 1 or 2, wherein the vertical tenon and the vertical reinforced concrete prefabricated member are integrally formed reinforced concrete prefabricated members.
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| CN110965803B (en) * | 2019-11-29 | 2024-03-26 | 中冶天工集团有限公司 | Underground diaphragm wall dismantling construction device and construction method thereof |
| CN112942313B (en) * | 2021-01-26 | 2022-12-06 | 上海兴庚基础工程有限公司 | Cement-mixed soil-implanted prefabricated reinforced concrete pile enclosure wall and construction method thereof |
| CN113863283A (en) * | 2021-09-30 | 2021-12-31 | 中国建筑第八工程局有限公司 | Connecting structure of diaphragm wall and construction method thereof |
| CN115262533B (en) * | 2022-08-08 | 2023-06-27 | 上海建工集团股份有限公司 | Joint-free underground diaphragm wall and construction method thereof |
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| CN102561314A (en) * | 2012-03-05 | 2012-07-11 | 张继红 | Prefabricated waterproof pile (WSP pile) and inserting and pulling construction method thereof |
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